/* roulang page: index */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --glass-strong:rgba(18,28,48,.82);
  --primary:#2F6BFF;
  --accent:#2BE0A8;
  --hot:#FF7A3C;
  --text:#EAF0FF;
  --muted:#9AA9C4;
  --dim:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --warn:#FFB020;
  --err:#FF5C6C;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --sh-1:0 8px 24px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(0,0,0,.45);
  --sh-3:0 24px 64px rgba(47,107,255,.18);
  --container:1280px;
  --font: "PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:32px 32px;
  opacity:.5;
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  top:-200px;
  right:-160px;
  width:640px;
  height:640px;
  background:radial-gradient(circle at center, rgba(47,107,255,.22), transparent 65%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease, border-color .2s ease, background-color .2s ease;}
a:hover{text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{margin:0;font-weight:650;color:var(--text);letter-spacing:.2px;line-height:1.32;}
h1{font-size:clamp(30px,4vw,46px);font-weight:700;}
h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;}
h3{font-size:22px;}
h4{font-size:18px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,textarea,select{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:2;
}
.section{padding:104px 0;position:relative;z-index:2;}
.section-tight{padding:72px 0;}
.section-head{max-width:820px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:2px;text-transform:uppercase;
  color:var(--accent);
  padding:6px 14px;border-radius:var(--radius-pill);
  border:1px solid rgba(43,224,168,.28);
  background:rgba(43,224,168,.08);
  margin-bottom:16px;
}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:15px;max-width:760px;}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  transition:background-color .28s ease, box-shadow .28s ease, border-color .28s ease, backdrop-filter .28s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  min-height:76px;
  padding-top:10px;
  padding-bottom:10px;
}
.nav-side{display:flex;align-items:center;gap:6px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--muted);
  border-radius:10px;
  white-space:nowrap;
  transition:color .2s ease, background-color .2s ease;
}
.nav-link:hover{color:var(--text);background:rgba(47,107,255,.10);text-decoration:none;}
.nav-link.active{color:var(--text);}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),var(--primary));
}
.brand{
  display:flex;flex-direction:column;align-items:center;
  text-align:center;text-decoration:none;
  padding:0 18px;
}
.brand:hover{text-decoration:none;}
.brand-main{
  font-size:17px;font-weight:700;color:var(--text);
  letter-spacing:.4px;line-height:1.25;
  background:linear-gradient(100deg,#EAF0FF 20%, #6FA0FF 75%, #2BE0A8 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.brand-sub{
  font-size:11px;letter-spacing:3px;color:var(--dim);
  margin-top:6px;
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 20px;margin-left:8px;
  font-size:14px;font-weight:600;color:#04121C;
  border-radius:var(--radius-btn);
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
  transition:transform .2s ease, box-shadow .2s ease, filter .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 0 30px rgba(47,107,255,.62);
  filter:saturate(1.06);
}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:rgba(18,28,48,.6);
  border:1px solid var(--line);
  border-radius:12px;color:var(--text);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;border-radius:2px;}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- Drawer ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:120;
  background:rgba(7,11,20,.97);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:22px 22px 40px;
  transform:translateX(102%);
  transition:transform .32s cubic-bezier(.4,.1,.2,1);
  overflow-y:auto;
  display:flex;flex-direction:column;
}
.drawer.open{transform:translateX(0);}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:18px;border-bottom:1px solid var(--line);
}
.drawer-close{
  width:42px;height:42px;border-radius:12px;
  background:rgba(18,28,48,.7);border:1px solid var(--line);
  color:var(--text);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-group{
  padding:22px 0 6px;
  font-size:12px;letter-spacing:2px;color:var(--dim);
}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;
  font-size:16px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{text-decoration:none;color:var(--primary);}
.drawer-link.active{color:var(--accent);}
.drawer-link .arrow{color:var(--dim);font-size:14px;}
.drawer-cta{
  margin-top:26px;display:flex;align-items:center;justify-content:center;
  min-height:48px;border-radius:var(--radius-btn);
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#04121C;font-weight:600;font-size:15px;
}
.drawer-cta:hover{text-decoration:none;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease, box-shadow .2s ease, background-color .2s ease, border-color .2s ease, filter .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn:active{transform:translateY(1px);}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
}
.btn-primary:hover{box-shadow:0 0 32px rgba(47,107,255,.65);filter:saturate(1.06);}
.btn-ghost{
  color:var(--text);
  background:rgba(18,28,48,.5);
  border-color:rgba(47,107,255,.4);
}
.btn-ghost:hover{background:rgba(47,107,255,.12);box-shadow:var(--sh-1);}
.btn-plain{
  color:var(--primary);background:transparent;padding:0 4px;
}
.btn-plain:hover{background:transparent;color:var(--accent);box-shadow:none;}
.btn-plain .arrow{transition:transform .2s ease;}
.btn-plain:hover .arrow{transform:translateX(4px);}
.btn-block{width:100%;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:170px 0 96px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center right;
  opacity:.42;
  z-index:0;
}
.hero-bg::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(90deg, var(--bg) 26%, rgba(7,11,20,.86) 54%, rgba(7,11,20,.42) 100%),
    linear-gradient(180deg, rgba(7,11,20,.72), rgba(7,11,20,.96));
}
.hero-grid{
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:56px;
  align-items:center;
}
.hero h1{margin-bottom:20px;}
.hero h1 .hl{
  background:linear-gradient(100deg,#5C8BFF,#2BE0A8);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-lead{
  font-size:17px;color:var(--muted);max-width:600px;
  margin-bottom:14px;
}
.hero-sub{
  font-size:15px;color:var(--dim);max-width:600px;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-points{
  display:flex;flex-wrap:wrap;gap:10px;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;font-size:13px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(18,28,48,.45);
}
.tag-accent{color:var(--accent);border-color:rgba(43,224,168,.3);background:rgba(43,224,168,.08);}
.tag-hot{color:var(--hot);border-color:rgba(255,122,60,.32);background:rgba(255,122,60,.08);}

.login-card{
  position:relative;
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  border-radius:20px;
  padding:28px;
  box-shadow:var(--sh-2);
  overflow:hidden;
}
.login-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.login-card h3{font-size:19px;margin-bottom:6px;}
.login-card .card-note{font-size:13.5px;color:var(--dim);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:7px;}
.field input{
  width:100%;
  min-height:46px;
  padding:0 14px;
  color:var(--text);
  background:rgba(7,11,20,.6);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field input::placeholder{color:#4C5A76;}
.field input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(47,107,255,.16);
}
.login-card .btn-primary{width:100%;margin-top:6px;}
.login-meta{
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--dim);margin-top:16px;
}
.login-meta a{color:var(--muted);}
.login-meta a:hover{color:var(--accent);text-decoration:none;}
.login-status{
  margin-top:18px;padding:12px 14px;
  border-radius:12px;
  border:1px solid rgba(43,224,168,.24);
  background:rgba(43,224,168,.07);
  font-size:13px;color:var(--accent);
  display:flex;align-items:center;gap:8px;
}
.dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 10px rgba(43,224,168,.9);
  flex:none;
}

/* ---------- Stats ---------- */
.stats{
  position:relative;z-index:2;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:rgba(13,20,36,.55);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
}
.stat{
  padding:30px 24px;
  border-right:1px solid var(--line);
}
.stat:last-child{border-right:none;}
.stat .value{
  font-size:32px;font-weight:700;line-height:1.2;
  background:linear-gradient(100deg,#EAF0FF,#5C8BFF);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat .value.accent{background:linear-gradient(100deg,#2BE0A8,#2F6BFF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.stat .label{font-size:13.5px;color:var(--dim);margin-top:8px;}

/* ---------- Compare table ---------- */
.table-shell{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:rgba(13,20,36,.6);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.table-scroll{overflow-x:auto;}
table.compare{
  width:100%;
  min-width:840px;
  border-collapse:separate;
  border-spacing:0;
}
table.compare thead th{
  position:sticky;top:0;
  background:rgba(13,20,36,.96);
  backdrop-filter:blur(8px);
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  text-align:center;
  padding:20px 16px;
  border-bottom:1px solid var(--line);
  z-index:2;
}
table.compare thead th:first-child{text-align:left;color:var(--dim);font-weight:500;width:26%;}
table.compare thead th.recommend{
  color:var(--text);
  background:linear-gradient(180deg,rgba(47,107,255,.16),rgba(13,20,36,.96));
  border-left:1px solid rgba(47,107,255,.4);
  border-right:1px solid rgba(47,107,255,.4);
  position:relative;
}
table.compare thead th .plan-name{display:block;font-size:16px;color:var(--text);font-weight:700;margin-bottom:4px;}
table.compare thead th .plan-price{font-size:13px;color:var(--hot);font-weight:600;}
.badge-rec{
  display:inline-block;
  font-size:11px;letter-spacing:1px;
  color:#04121C;font-weight:700;
  padding:2px 10px;border-radius:var(--radius-pill);
  background:var(--hot);
  margin-left:6px;
  vertical-align:middle;
}
table.compare tbody td{
  padding:16px;
  font-size:14.5px;
  text-align:center;
  color:var(--muted);
  border-bottom:1px solid var(--line);
}
table.compare tbody td:first-child{text-align:left;color:var(--text);font-size:14.5px;}
table.compare tbody tr:last-child td{border-bottom:none;}
table.compare tbody td.col-rec{
  background:rgba(47,107,255,.08);
  border-left:1px solid rgba(47,107,255,.35);
  border-right:1px solid rgba(47,107,255,.35);
  color:var(--text);
}
table.compare tbody tr:hover td{background:rgba(255,255,255,.02);}
table.compare tbody tr:hover td.col-rec{background:rgba(47,107,255,.13);}
.yes{color:var(--accent);font-weight:600;}
.no{color:var(--dim);opacity:.6;}
.table-foot{
  padding:16px 22px;
  font-size:13px;color:var(--dim);
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
}

/* ---------- Level cards ---------- */
.level-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.level-card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  overflow:hidden;
}
.level-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.7),transparent);
  opacity:0;transition:opacity .25s ease;
}
.level-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-3);
}
.level-card:hover::before{opacity:1;}
.level-card.main{grid-column:span 6;padding:34px;}
.level-card.side{grid-column:span 3;}
.level-badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:1px;
  padding:5px 12px;border-radius:var(--radius-pill);
  margin-bottom:18px;
}
.lv-1{color:var(--muted);background:rgba(154,169,196,.1);border:1px solid var(--line);}
.lv-2{color:var(--accent);background:rgba(43,224,168,.1);border:1px solid rgba(43,224,168,.3);}
.lv-3{color:var(--hot);background:rgba(255,122,60,.1);border:1px solid rgba(255,122,60,.32);}
.level-card h3{font-size:20px;margin-bottom:10px;}
.level-card .desc{font-size:14.5px;color:var(--muted);margin-bottom:20px;}
.level-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;}
.level-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--muted);
}
.level-list li::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  margin-top:9px;flex:none;
  background:var(--primary);
}
.level-list li.good::before{background:var(--accent);box-shadow:0 0 8px rgba(43,224,168,.8);}
.meter{margin-top:18px;}
.meter-top{
  display:flex;justify-content:space-between;
  font-size:13px;color:var(--dim);margin-bottom:8px;
}
.meter-bar{
  height:8px;border-radius:999px;
  background:rgba(255,255,255,.06);
  overflow:hidden;
}
.meter-fill{
  height:100%;border-radius:999px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
}
.meter-fill.hot{background:linear-gradient(90deg,var(--hot),#FFC48C);}
.meter-fill.mid{background:linear-gradient(90deg,#3E63D6,#2BE0A8);}

/* ---------- Content cards ---------- */
.content-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.content-card{
  position:relative;
  background:rgba(13,20,36,.72);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  display:flex;flex-direction:column;
}
.content-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-3);
}
.content-thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  border-radius:12px 12px 0 0;
  background:#0A101E;
}
.content-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.content-card:hover .content-thumb img{transform:scale(1.05);}
.lock-mask{
  position:absolute;inset:0;
  background:rgba(6,10,18,.62);
  backdrop-filter:blur(2px);
  display:flex;align-items:center;justify-content:center;
  transition:background-color .25s ease;
}
.content-card:hover .lock-mask{background:rgba(6,10,18,.42);}
.lock-icon{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(18,28,48,.85);
  border:1px solid var(--line-strong);
  color:var(--muted);font-size:16px;
}
.lv-tag{
  position:absolute;top:12px;right:12px;
  font-size:11px;font-weight:600;letter-spacing:.6px;
  padding:4px 10px;border-radius:var(--radius-pill);
  background:rgba(7,11,20,.82);
  border:1px solid rgba(255,122,60,.4);
  color:var(--hot);
  z-index:3;
}
.lv-tag.green{border-color:rgba(43,224,168,.4);color:var(--accent);}
.content-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.cat-chip{
  display:inline-flex;align-self:flex-start;
  font-size:12px;color:var(--primary);
  padding:3px 10px;border-radius:var(--radius-pill);
  border:1px solid rgba(47,107,255,.3);
  background:rgba(47,107,255,.08);
  margin-bottom:12px;
}
.content-body h3{
  font-size:16.5px;
  line-height:1.5;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.content-body h3 a{color:var(--text);}
.content-body h3 a:hover{color:var(--primary);text-decoration:none;}
.content-body .excerpt{
  font-size:13.5px;color:var(--dim);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:16px;
}
.content-foot{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--dim);
  padding-top:14px;border-top:1px solid var(--line);
}
.unlock-hint{color:var(--hot);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:1000px;}
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:rgba(13,20,36,.66);
  overflow:hidden;
  transition:border-color .25s ease, background-color .25s ease;
}
.faq-item:hover{border-color:rgba(47,107,255,.32);}
.faq-item.open{border-color:rgba(47,107,255,.45);background:rgba(18,28,48,.72);}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:14px;
  padding:20px 24px;
  background:transparent;border:none;
  color:var(--text);font-size:16px;font-weight:600;
  text-align:left;cursor:pointer;
  position:relative;
}
.faq-q::before{
  content:"";
  width:2px;align-self:stretch;border-radius:2px;
  background:var(--primary);
  flex:none;
  transition:background-color .25s ease;
}
.faq-item.open .faq-q::before{background:var(--accent);}
.faq-q .q-text{flex:1;min-width:0;}
.faq-arrow{
  flex:none;color:var(--dim);font-size:13px;
  transition:transform .28s ease, color .28s ease;
}
.faq-item.open .faq-arrow{transform:rotate(180deg);color:var(--accent);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .34s ease;
}
.faq-a .inner{
  max-width:760px;
  padding:0 24px 22px 40px;
  font-size:14.5px;color:var(--muted);line-height:1.8;
}
.faq-item.open .faq-a{max-height:420px;}

/* ---------- CMS posts ---------- */
.post-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.post-card{
  display:flex;flex-direction:column;
  background:rgba(13,20,36,.72);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.post-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-3);
}
.post-thumb{
  display:block;
  aspect-ratio:16/9;
  overflow:hidden;
  background:#0A101E;
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.05);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.post-body h3{
  font-size:16.5px;line-height:1.5;margin:10px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body h3 a{color:var(--text);}
.post-body h3 a:hover{color:var(--primary);text-decoration:none;}
.post-body .excerpt{
  font-size:13.5px;color:var(--dim);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:16px;
}
.empty-state{
  grid-column:1 / -1;
  text-align:center;
  padding:56px 24px;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
  background:rgba(13,20,36,.5);
}
.empty-state .icon{
  width:52px;height:52px;margin:0 auto 16px;
  border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,107,255,.1);
  border:1px solid rgba(47,107,255,.28);
  color:var(--primary);font-size:20px;
}
.empty-state p{color:var(--dim);font-size:14.5px;margin-bottom:18px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-strong);
  border-radius:24px;
  background:linear-gradient(120deg, rgba(18,28,48,.9), rgba(13,20,36,.72));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:48px;
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:36px;
  align-items:center;
  box-shadow:var(--sh-2);
}
.cta-band::after{
  content:"";
  position:absolute;
  top:-120px;right:-80px;
  width:420px;height:420px;
  background:radial-gradient(circle at center, rgba(255,122,60,.22), transparent 65%);
  pointer-events:none;
}
.cta-band h2{font-size:28px;margin-bottom:14px;}
.cta-band p{color:var(--muted);font-size:15px;max-width:560px;}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.cta-actions{
  display:flex;flex-direction:column;gap:14px;
  position:relative;z-index:2;
}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;z-index:2;
  border-top:1px solid var(--line);
  background:rgba(9,14,24,.9);
  padding:72px 0 0;
  margin-top:8px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand-main{font-size:18px;}
.footer-brand .brand-sub{
  display:block;text-align:left;
  margin-top:10px;
}
.footer-brand p{
  margin-top:18px;font-size:13.5px;color:var(--dim);
  line-height:1.75;max-width:320px;
}
.footer-col h4{
  font-size:14px;color:var(--text);margin-bottom:18px;
  letter-spacing:.5px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:13.5px;color:var(--muted);}
.footer-col a:hover{color:var(--accent);text-decoration:none;}
.footer-col .plain{font-size:13.5px;color:var(--muted);}
.footer-legal{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--dim);
}
.footer-legal .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-legal a{color:var(--dim);}
.footer-legal a:hover{color:var(--muted);text-decoration:none;}

/* ---------- Responsive ---------- */
@media (max-width:1439px){
  .container{max-width:1140px;}
  .section{padding:88px 0;}
}
@media (max-width:1199px){
  .container{max-width:100%;}
  .hero{padding-top:150px;}
  .hero-grid{gap:40px;}
  .content-grid{grid-template-columns:repeat(3,1fr);}
  .level-card.main{grid-column:span 6;}
  .level-card.side{grid-column:span 3;}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{grid-template-columns:auto 1fr auto;min-height:68px;}
  .brand{grid-column:2;justify-self:center;padding:0;}
  .nav-toggle{grid-column:1;grid-row:1;}
  .nav-right-mobile{display:flex;grid-column:3;justify-self:end;align-items:center;gap:10px;}
  .hero{padding-top:126px;padding-bottom:72px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-bg{background-position:center;}
  .section{padding:72px 0;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:none;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}
  .level-grid{grid-template-columns:repeat(6,1fr);}
  .level-card.main{grid-column:span 6;}
  .level-card.side{grid-column:span 3;}
  .content-grid{grid-template-columns:repeat(2,1fr);}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;padding:38px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .hero{padding-top:112px;padding-bottom:56px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .level-grid{grid-template-columns:1fr;}
  .level-card.main,.level-card.side{grid-column:span 1;}
  .content-grid{grid-template-columns:1fr;}
  .post-grid{grid-template-columns:1fr;}
  .faq-q{padding:18px 18px;font-size:15px;}
  .faq-a .inner{padding:0 18px 20px 34px;}
  .cta-band{padding:30px 22px;border-radius:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-legal{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  h1{font-size:28px;}
  h2{font-size:23px;}
  .stats-grid{grid-template-columns:1fr;}
  .stat{border-right:none;border-bottom:1px solid var(--line);}
  .stat:last-child{border-bottom:none;}
  .login-card{padding:22px 18px;}
  .btn{width:100%;}
  .table-foot{font-size:12.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --primary:#2F6BFF;
  --primary-soft:rgba(47,107,255,.14);
  --accent:#2BE0A8;
  --heat:#FF7A3C;
  --text:#EAF0FF;
  --text-2:#9AA9C4;
  --text-3:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --warn:#FFB020;
  --error:#FF5C6C;
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(0,0,0,.45);
  --shadow-3:0 24px 64px rgba(47,107,255,.18);
  --container:1280px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(47,107,255,.16), transparent 62%),
    radial-gradient(760px 420px at 4% 6%, rgba(43,224,168,.10), transparent 60%),
    linear-gradient(180deg,#070B14 0%,#080D18 46%,#070B14 100%);
  background-attachment:fixed;
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  min-height:100vh;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:32px 32px;
  opacity:.55;
  mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease, border-color .18s ease, background .18s ease;}
a:hover{color:#7FA6FF;text-decoration:underline;text-underline-offset:3px;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;color:var(--text);}
h1{font-size:clamp(28px,4vw,44px);font-weight:700;letter-spacing:-.4px;}
h2{font-size:clamp(24px,2.6vw,32px);}
h3{font-size:22px;}
h4{font-size:18px;}
p{margin:0 0 16px;color:var(--text-2);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:2;}
.tnum{font-variant-numeric:tabular-nums;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,11,20,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(9,14,25,.88);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.42);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  min-height:78px;
}
.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  gap:2px;
  padding:6px 14px;
  text-decoration:none;
}
.brand:hover{text-decoration:none;}
.brand-main{
  font-size:18px;
  font-weight:700;
  letter-spacing:.6px;
  background:linear-gradient(100deg,#EAF0FF 8%,#8FB4FF 52%,#2BE0A8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;
  letter-spacing:3px;
  color:var(--text-3);
  text-transform:none;
}
.nav-side{display:flex;align-items:center;gap:6px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--text-2);
  white-space:nowrap;
  transition:color .18s ease, background .18s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);text-decoration:none;}
.nav-link.active{color:var(--text);}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--accent),rgba(43,224,168,.2));
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  height:42px;
  padding:0 18px;
  margin-left:8px;
  border-radius:var(--radius-sm);
  font-size:14.5px;
  font-weight:600;
  color:#04121C;
  background:linear-gradient(135deg,#2F6BFF 0%,#2BE0A8 100%);
  box-shadow:0 0 22px rgba(47,107,255,.45);
  transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.nav-cta:hover{
  color:#04121C;
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 0 30px rgba(47,107,255,.6);
  filter:saturate(1.06);
}
.nav-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  align-items:center;
  justify-content:center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .22s ease, opacity .22s ease;
}
.nav-toggle span::before{transform:translateY(-6px);}
.nav-toggle span::after{transform:translateY(4px);}

/* ---------- breadcrumb ---------- */
.crumb-bar{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, rgba(13,20,36,.72), rgba(13,20,36,.24));
}
.crumb-inner{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  padding:18px 0;
  font-size:13.5px;
  color:var(--text-3);
}
.crumb-inner a{color:var(--text-2);}
.crumb-inner a:hover{color:var(--primary);}
.crumb-sep{color:var(--text-3);opacity:.7;}
.crumb-current{
  max-width:56ch;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  color:var(--text);
}
.tag-chip{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  font-size:12px;
  letter-spacing:.4px;
  color:#BBD1FF;
  background:rgba(47,107,255,.14);
  border:1px solid rgba(47,107,255,.34);
}

/* ---------- article hero ---------- */
.article-head{
  padding:44px 0 34px;
  position:relative;
}
.article-head::after{
  content:"";
  position:absolute;
  left:24px;right:24px;bottom:0;
  height:1px;
  background:linear-gradient(90deg, rgba(47,107,255,.5), rgba(43,224,168,.16), transparent);
}
.article-head-inner{max-width:900px;}
.article-head h1{
  margin:16px 0 18px;
  line-height:1.3;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  font-size:13.5px;
  color:var(--text-3);
}
.meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(43,224,168,.7);
  flex:none;
}

/* ---------- layout ---------- */
.page-main{padding:56px 0 88px;}
.read-layout{
  display:grid;
  grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:40px;
  align-items:start;
}
.article-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  padding:28px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.lead-box{
  border-left:3px solid var(--primary);
  background:rgba(47,107,255,.07);
  border-radius:0 12px 12px 0;
  padding:16px 20px;
  margin-bottom:26px;
  color:var(--text-2);
  font-size:15px;
}

/* ---------- article body (CMS 注入) ---------- */
.article-body{
  max-width:780px;
  font-size:16px;
  line-height:1.9;
  color:#CBD6EC;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;color:#C3CFE7;line-height:1.9;}
.article-body h2{
  position:relative;
  margin:2.1em 0 .9em;
  padding-left:16px;
  font-size:24px;
  color:var(--text);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;
  width:3px;height:1.05em;
  border-radius:3px;
  background:linear-gradient(180deg,var(--primary),#7FA6FF);
}
.article-body h3{
  position:relative;
  margin:1.7em 0 .7em;
  padding-left:18px;
  font-size:19px;
  color:#DDE7FF;
}
.article-body h3::before{
  content:"";
  position:absolute;
  left:2px;top:.5em;
  width:0;height:0;
  border-left:7px solid var(--accent);
  border-top:5px solid transparent;
  border-bottom:5px solid transparent;
}
.article-body h4{margin:1.4em 0 .5em;font-size:16.5px;color:#DDE7FF;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;}
.article-body ul li,
.article-body ol li{
  position:relative;
  padding-left:22px;
  margin-bottom:.55em;
  color:#C3CFE7;
  line-height:1.85;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--accent);
  opacity:.85;
}
.article-body ol{counter-reset:olc;}
.article-body ol li::before{
  counter-increment:olc;
  content:counter(olc);
  position:absolute;
  left:0;top:.32em;
  width:18px;height:18px;
  display:flex;align-items:center;justify-content:center;
  font-size:11px;
  color:#04121C;
  background:var(--accent);
  border-radius:6px;
}
.article-body blockquote{
  margin:1.6em 0;
  padding:16px 22px;
  border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;
  background:rgba(43,224,168,.07);
  color:#D6E2F7;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:12px;
  margin:1.4em 0;
  box-shadow:var(--shadow-1);
}
.article-body figure{margin:1.4em 0;}
.article-body figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--text-3);
  text-align:center;
}
.article-body table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  margin:1.5em 0;
  font-size:14.5px;
}
.article-body th,.article-body td{
  padding:10px 14px;
  text-align:left;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.article-body th{color:var(--text);background:rgba(47,107,255,.08);}
.article-body td{color:var(--text-2);}
.article-body strong{color:var(--text);}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0;}
.article-body a{color:var(--primary);}

/* ---------- sidebar ---------- */
.side-col{display:flex;flex-direction:column;gap:22px;}
.side-sticky{position:sticky;top:104px;display:flex;flex-direction:column;gap:22px;}
.side-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  padding:22px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.side-card h3{
  font-size:15px;
  letter-spacing:.6px;
  color:var(--text);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:3px;height:14px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--accent));
}
.toc-list li{margin-bottom:4px;}
.toc-list a{
  display:block;
  padding:9px 12px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-2);
  border-left:2px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.toc-list a:hover{
  color:var(--text);
  background:rgba(47,107,255,.1);
  border-left-color:var(--primary);
  text-decoration:none;
  transform:translateX(2px);
}
.hot-list li + li{border-top:1px solid var(--line);}
.hot-list a{
  display:block;
  padding:12px 0;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.6;
}
.hot-list a:hover{color:var(--primary);text-decoration:none;}
.hot-list .hot-meta{
  display:block;
  margin-top:5px;
  font-size:12px;
  color:var(--text-3);
}
.side-note{
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
  margin:0;
}

/* ---------- tags / pager / related ---------- */
.block-gap{margin-top:78px;}
.block-head{margin-bottom:26px;}
.block-head h2{margin-bottom:10px;}
.block-head p{margin:0;font-size:15px;}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  padding-top:26px;
  margin-top:30px;
  border-top:1px solid var(--line);
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  font-size:13px;
  color:#BBD1FF;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-strong);
  transition:border-color .18s ease, background .18s ease, transform .18s ease;
}
.tag-pill:hover{
  color:var(--text);
  border-color:rgba(47,107,255,.5);
  background:var(--primary-soft);
  text-decoration:none;
  transform:translateY(-2px);
}
.pager-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.pager-card{
  display:block;
  padding:22px 24px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.pager-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--shadow-2);
  text-decoration:none;
}
.pager-card .pager-label{
  display:block;
  font-size:12px;
  letter-spacing:1.4px;
  color:var(--text-3);
  margin-bottom:8px;
}
.pager-card .pager-title{
  display:block;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  line-height:1.5;
}
.pager-card .pager-desc{
  display:block;
  margin-top:8px;
  font-size:13.5px;
  color:var(--text-2);
}

.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--gap);
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;
  transition:opacity .22s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--shadow-2);
}
.card:hover::before{opacity:1;}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,#101A2E,#0A1120);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.card:hover .card-media img{transform:scale(1.05);}
.card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 40%, rgba(7,11,20,.72) 100%);
}
.card-body{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:22px 24px 24px;
  flex:1;
}
.card-title{
  font-size:17px;
  line-height:1.55;
  color:var(--text);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-desc{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  color:var(--text-3);
}
.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  font-size:12px;
  letter-spacing:.3px;
  color:#BBD1FF;
  background:rgba(47,107,255,.14);
  border:1px solid rgba(47,107,255,.32);
  white-space:nowrap;
}
.badge-accent{color:#9BF2D6;background:rgba(43,224,168,.12);border-color:rgba(43,224,168,.34);}
.badge-heat{color:#FFC7A6;background:rgba(255,122,60,.14);border-color:rgba(255,122,60,.36);}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:82px;
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid rgba(47,107,255,.32);
  background:
    radial-gradient(620px 300px at 12% 0%, rgba(47,107,255,.26), transparent 62%),
    radial-gradient(520px 300px at 92% 100%, rgba(43,224,168,.18), transparent 60%),
    var(--panel);
  box-shadow:var(--shadow-3);
  padding:42px;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
  gap:32px;
  align-items:center;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:12px;}
.cta-band p{margin:0;font-size:15px;color:var(--text-2);}
.cta-points{
  margin-top:16px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  font-size:13.5px;
  color:var(--text-2);
}
.cta-points span{display:inline-flex;align-items:center;gap:8px;}
.cta-points span::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(43,224,168,.7);
}
.cta-actions{display:flex;flex-direction:column;gap:14px;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--radius-sm);
  font-size:15.5px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, filter .18s ease;
}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,#2F6BFF 0%,#2BE0A8 100%);
  box-shadow:0 0 22px rgba(47,107,255,.45);
}
.btn-primary:hover{
  color:#04121C;
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 0 34px rgba(47,107,255,.62);
  filter:saturate(1.06);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  color:#CFE0FF;
  background:rgba(255,255,255,.03);
  border-color:rgba(47,107,255,.4);
}
.btn-ghost:hover{
  color:var(--text);
  text-decoration:none;
  background:rgba(47,107,255,.12);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-link{
  min-height:auto;
  padding:0;
  color:var(--primary);
  font-weight:500;
  justify-content:flex-start;
}
.btn-link:hover{color:#7FA6FF;text-decoration:underline;text-underline-offset:3px;}

/* ---------- empty state ---------- */
.empty-state{
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:16px;
  padding:64px 24px;
  border-radius:var(--radius);
  border:1px dashed var(--line-strong);
  background:rgba(255,255,255,.02);
}
.empty-icon{
  width:56px;height:56px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid rgba(47,107,255,.4);
  background:rgba(47,107,255,.1);
  color:#BBD1FF;
  font-size:22px;
}
.empty-state h3{font-size:19px;}
.empty-state p{margin:0;font-size:14.5px;max-width:48ch;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(13,20,36,.5), rgba(7,11,20,.9));
  padding:64px 0 28px;
  position:relative;
  z-index:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:36px;
  padding-bottom:38px;
}
.footer-brand{display:flex;flex-direction:column;gap:8px;}
.footer-brand .brand-main{font-size:18px;}
.footer-brand .brand-sub{letter-spacing:3px;}
.footer-brand p{margin-top:10px;font-size:14px;color:var(--text-3);max-width:44ch;line-height:1.8;}
.footer-col h4{
  font-size:14.5px;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.4px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-col .plain{font-size:14px;color:var(--text-3);}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-legal .links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-legal a{color:var(--text-3);}
.footer-legal a:hover{color:var(--primary);}

/* ---------- responsive ---------- */
@media (max-width:1439px){
  :root{--container:1140px;}
}
@media (max-width:1199px){
  .read-layout{grid-template-columns:minmax(0,1fr);}
  .side-sticky{position:static;flex-direction:row;flex-wrap:wrap;}
  .side-sticky > *{flex:1 1 300px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .nav-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    min-height:70px;
  }
  .nav-toggle{display:inline-flex;}
  .brand{position:absolute;left:50%;transform:translateX(-50%);}
  .nav-side{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:4px;
    padding:96px 24px 32px;
    background:rgba(7,11,20,.98);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    transform:translateY(-100%);
    opacity:0;
    visibility:hidden;
    transition:transform .3s ease, opacity .25s ease, visibility .3s ease;
    z-index:90;
    overflow-y:auto;
  }
  .nav-left{order:1;}
  .nav-right{order:2;justify-content:flex-start;border-top:1px solid var(--line);margin-top:12px;padding-top:12px;}
  body.nav-open .nav-side{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
  }
  .nav-link{
    height:50px;
    font-size:16px;
    padding:0 14px;
    border-radius:12px;
  }
  .nav-link.active{background:rgba(47,107,255,.12);}
  .nav-link.active::after{display:none;}
  .nav-cta{margin:14px 0 0;height:50px;justify-content:center;}
  .article-head{padding:34px 0 28px;}
  .page-main{padding:40px 0 70px;}
  .block-gap{margin-top:60px;}
  .cta-band{padding:32px;margin-top:64px;}
  .site-footer{margin-top:72px;padding:52px 0 24px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  body{font-size:15.5px;}
  .article-panel{padding:20px 18px;}
  .article-body{max-width:none;}
  .pager-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-legal{flex-direction:column;align-items:flex-start;}
  .cta-actions .btn{width:100%;}
  .cta-band{padding:26px 20px;border-radius:16px;}
  .crumb-inner{padding:14px 0;}
  .article-head h1{font-size:clamp(24px,7vw,30px);}
}
@media (max-width:479px){
  .brand-main{font-size:15.5px;letter-spacing:.2px;}
  .brand-sub{font-size:10px;letter-spacing:2px;}
  .meta-row{gap:8px 14px;font-size:13px;}
  .side-card{padding:18px;}
  .badge{font-size:11.5px;padding:0 10px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --glass-2:rgba(18,28,48,.78);
  --primary:#2F6BFF;
  --primary-soft:rgba(47,107,255,.14);
  --accent:#2BE0A8;
  --accent-soft:rgba(43,224,168,.14);
  --hot:#FF7A3C;
  --text:#EAF0FF;
  --text-2:#9AA9C4;
  --text-3:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --warn:#FFB020;
  --err:#FF5C6C;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 8px 24px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(0,0,0,.45);
  --sh-3:0 24px 64px rgba(47,107,255,.18);
  --ease:cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.55;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:3px}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(47,107,255,.35);color:#fff}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 28px;
  position:relative;
  z-index:1;
}
@media (max-width:1439px){.container{max-width:1140px}}
@media (max-width:1024px){.container{padding:0 22px}}
@media (max-width:520px){.container{padding:0 18px}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,11,20,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.site-header.scrolled{
  background:rgba(7,11,20,.92);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  min-height:78px;
}
.nav-side{display:flex;align-items:center;gap:26px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 0;
  white-space:nowrap;
  transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s var(--ease);
}
.nav-link:hover{color:var(--text);text-decoration:none}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--text);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  line-height:1.1;
  padding:4px 10px;
  border-radius:var(--r-btn);
}
.brand:hover{text-decoration:none}
.brand-main{
  font-size:19px;
  font-weight:700;
  letter-spacing:.5px;
  background:linear-gradient(92deg,#FFFFFF 10%,#9FC0FF 90%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:#fff;
}
.brand-sub{
  font-size:11px;
  letter-spacing:.24em;
  color:var(--text-3);
  margin-top:5px;
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:0 20px;
  border-radius:var(--r-btn);
  font-size:14px;
  font-weight:600;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 20px rgba(47,107,255,.35);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
  white-space:nowrap;
}
.nav-cta:hover{
  text-decoration:none;
  transform:translateY(-2px);
  filter:saturate(1.12);
  box-shadow:0 0 28px rgba(47,107,255,.5);
}
.nav-cta:active{transform:translateY(1px)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  background:var(--glass);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  position:relative;
  z-index:80;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .25s var(--ease),background .25s var(--ease);
}
.nav-toggle span::before{content:"";position:absolute;transform:translateY(-6px)}
.nav-toggle span::after{content:"";position:absolute;transform:translateY(6px)}
.nav-open .nav-toggle span{background:transparent}
.nav-open .nav-toggle span::before{transform:rotate(45deg)}
.nav-open .nav-toggle span::after{transform:rotate(-45deg)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative}
@media (max-width:1024px){.section{padding:64px 0}}
@media (max-width:520px){.section{padding:48px 0}}
.section-head{max-width:800px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--accent);
  border:1px solid var(--accent-soft);
  background:var(--accent-soft);
  padding:5px 12px;
  border-radius:var(--r-pill);
  margin-bottom:16px;
}
.section h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.35;
  letter-spacing:.2px;
}
.section-desc{
  margin-top:14px;
  color:var(--text-2);
  font-size:15px;
  max-width:760px;
}
.section-head.center .section-desc{margin-left:auto;margin-right:auto}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease);
  white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
}
.btn-primary:hover{transform:translateY(-2px);filter:saturate(1.06);box-shadow:0 0 32px rgba(47,107,255,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--text);
  background:var(--glass);
  border:1px solid rgba(47,107,255,.4);
}
.btn-ghost:hover{background:var(--primary-soft);transform:translateY(-2px);border-color:rgba(47,107,255,.7)}
.btn-line{
  color:var(--primary);
  padding:0 4px;
  min-height:44px;
  border:0;
}
.btn-line::after{content:"→";transition:transform .22s var(--ease)}
.btn-line:hover::after{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:80px 0 88px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  opacity:.42;
  -webkit-mask-image:linear-gradient(90deg,rgba(0,0,0,.22) 0%,rgba(0,0,0,.8) 45%,rgba(0,0,0,.35) 100%);
  mask-image:linear-gradient(90deg,rgba(0,0,0,.22) 0%,rgba(0,0,0,.8) 45%,rgba(0,0,0,.35) 100%);
}
.hero::after{
  content:"";
  position:absolute;
  top:-180px;right:-120px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(47,107,255,.28),transparent 68%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:56px;
  align-items:center;
}
.hero h1{
  font-size:clamp(30px,4vw,46px);
  font-weight:700;
  line-height:1.28;
  letter-spacing:.4px;
  margin:18px 0 18px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(92deg,var(--primary),var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{
  color:var(--text-2);
  font-size:16px;
  max-width:560px;
  line-height:1.8;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-2);
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:7px 14px;
}
.pill i{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
  font-style:normal;
}
.hero-card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  box-shadow:var(--sh-2);
}
.hero-card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  border-radius:var(--r-card) var(--r-card) 0 0;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.hero-card h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:6px;
}
.hero-card .card-note{
  font-size:13px;
  color:var(--text-3);
  margin-bottom:20px;
}
.step-mini{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-top:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
}
.step-mini:first-of-type{border-top:0}
.step-mini b{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 24px;
  height:24px;
  border-radius:8px;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:12px;
  font-weight:700;
}
.hero-status{
  margin-top:18px;
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  color:var(--accent);
  background:var(--accent-soft);
  border:1px solid rgba(43,224,168,.24);
  border-radius:var(--r-btn);
  padding:10px 14px;
}

/* ---------- 指标条 ---------- */
.metrics{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,20,36,.7),rgba(13,20,36,.15));
}
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.metric{
  padding:34px 26px;
  border-left:1px solid var(--line);
}
.metric:first-child{border-left:0}
.metric .num{
  font-size:clamp(26px,3vw,34px);
  font-weight:700;
  line-height:1.2;
  color:var(--text);
  font-variant-numeric:tabular-nums;
  letter-spacing:.5px;
}
.metric .num span{font-size:16px;color:var(--text-2);margin-left:4px;font-weight:500}
.metric .lbl{
  margin-top:8px;
  font-size:14px;
  color:var(--text-2);
}
.metric .tag{
  display:inline-block;
  margin-top:12px;
  font-size:12px;
  color:var(--primary);
  background:var(--primary-soft);
  border-radius:var(--r-pill);
  padding:3px 10px;
}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  counter-reset:step;
}
.step{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.step::before{
  counter-increment:step;
  content:"0" counter(step);
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  margin-bottom:14px;
}
.step:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-3);
}
.step h3{font-size:18px;font-weight:600;margin-bottom:10px}
.step p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- 图文卡 ---------- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.feature-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.feature-card::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-3);
}
.feature-card:hover::after{transform:scaleX(1)}
.feature-card .thumb{
  aspect-ratio:16/9;
  width:100%;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.feature-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.feature-card:hover .thumb img{transform:scale(1.04)}
.feature-body{padding:24px 26px 28px}
.feature-body h3{font-size:20px;font-weight:600;margin-bottom:10px}
.feature-body p{font-size:14.5px;color:var(--text-2);line-height:1.8}
.check-list{margin-top:16px;display:grid;gap:9px}
.check-list li{
  position:relative;
  padding-left:22px;
  font-size:14px;
  color:var(--text-2);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 8px rgba(43,224,168,.6);
}

/* ---------- 对比矩阵 ---------- */
.matrix-wrap{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--glass);
  overflow:hidden;
}
.matrix-scroll{overflow-x:auto}
.matrix{
  min-width:840px;
  display:grid;
  grid-template-columns:220px repeat(3,1fr);
}
.matrix > div{
  padding:18px 20px;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
  display:flex;
  align-items:center;
  gap:10px;
}
.matrix .m-head{
  font-size:15px;
  font-weight:600;
  color:var(--text);
  background:rgba(255,255,255,.02);
  position:sticky;
  top:0;
}
.matrix .m-row{
  color:var(--text);
  font-weight:500;
  background:rgba(255,255,255,.015);
}
.matrix .m-col-hot{
  background:rgba(47,107,255,.08);
  border-left:1px solid rgba(47,107,255,.35);
  border-right:1px solid rgba(47,107,255,.35);
}
.matrix .m-head.m-col-hot{position:relative}
.matrix .m-head.m-col-hot .hot-badge{
  display:inline-block;
  margin-left:8px;
  font-size:11px;
  font-weight:700;
  color:#1B0E05;
  background:var(--hot);
  border-radius:var(--r-pill);
  padding:2px 9px;
  vertical-align:middle;
}
.bar{
  flex:1;
  height:6px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.08);
  overflow:hidden;
  min-width:60px;
}
.bar i{
  display:block;
  height:100%;
  border-radius:var(--r-pill);
  background:linear-gradient(90deg,var(--primary),var(--accent));
}
.bar.dim i{background:rgba(255,255,255,.18)}
.matrix .num-inline{
  font-variant-numeric:tabular-nums;
  color:var(--text);
  font-weight:600;
  font-size:13px;
}
.dot-yes::before{content:"✓";color:var(--accent);font-weight:700;font-size:13px}
.dot-no{color:var(--text-3);opacity:.6}
.matrix-note{
  font-size:13px;
  color:var(--text-3);
  padding:16px 20px;
  border-top:1px solid var(--line);
}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;display:grid;gap:12px}
.faq-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.faq-item[open]{border-color:rgba(47,107,255,.4);background:var(--glass-2)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 24px 20px 26px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:2px;height:22px;
  border-radius:2px;
  background:var(--primary);
  transition:background .25s var(--ease);
}
.faq-item[open] summary::before{background:var(--accent)}
.faq-item summary::after{
  content:"";
  flex:0 0 10px;
  width:10px;height:10px;
  border-right:2px solid var(--text-2);
  border-bottom:2px solid var(--text-2);
  transform:rotate(45deg);
  transition:transform .3s var(--ease),border-color .3s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--accent)}
.faq-body{
  padding:0 24px 22px 26px;
  max-width:760px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.85;
}
.faq-item summary:hover{color:#fff}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  overflow:hidden;
  background:linear-gradient(120deg,rgba(18,28,48,.9),rgba(13,20,36,.72));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:44px 48px;
  display:grid;
  grid-template-columns:1.35fr .65fr;
  gap:40px;
  align-items:center;
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  box-shadow:var(--sh-2);
}
.cta-panel::before{
  content:"";
  position:absolute;
  top:-140px;right:-80px;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(255,122,60,.22),transparent 66%);
  pointer-events:none;
}
.cta-panel h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.35}
.cta-panel p{margin-top:12px;color:var(--text-2);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:stretch;position:relative}
.cta-actions .btn{width:100%}
.cta-actions .hint{font-size:12.5px;color:var(--text-3);text-align:center}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  padding:22px 0 0;
}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:var(--text-3);opacity:.6}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:20px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,20,36,.55),rgba(7,11,20,.95));
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid var(--line);
}
.footer-brand .brand-main{display:block;font-size:18px}
.footer-brand .brand-sub{display:block;margin-top:6px}
.footer-brand p{
  margin-top:18px;
  font-size:13.5px;
  color:var(--text-3);
  line-height:1.8;
  max-width:360px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col li{margin-bottom:11px;font-size:14px}
.footer-col a{color:var(--text-2)}
.footer-col a:hover{color:var(--primary);text-decoration:none}
.footer-col .plain{color:var(--text-3);font-size:13.5px}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:14px 24px;
  align-items:center;
  justify-content:space-between;
  padding-top:24px;
  font-size:13px;
  color:var(--text-3);
}
.footer-legal .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal a{color:var(--text-3)}
.footer-legal a:hover{color:var(--primary);text-decoration:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-grid{gap:40px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(3){border-left:0}
  .metric:nth-child(n+3){border-top:1px solid var(--line)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-col:last-child{grid-column:span 3}
}
@media (max-width:1024px){
  .nav-toggle{display:flex;order:0}
  .nav-wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:66px;
    position:relative;
  }
  .brand{
    position:absolute;
    left:50%;
    transform:translateX(-50%);
  }
  .brand-main{font-size:17px}
  .nav-side{
    position:fixed;
    left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:0 24px;
    opacity:0;
    visibility:hidden;
    transition:opacity .28s var(--ease),transform .28s var(--ease);
    z-index:70;
  }
  .nav-left{
    top:0;
    height:100%;
    padding-top:104px;
    background:rgba(7,11,20,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    transform:translateY(-10px);
    overflow-y:auto;
  }
  .nav-right{
    bottom:0;
    padding-bottom:44px;
    padding-top:16px;
    transform:translateY(10px);
    background:linear-gradient(180deg,transparent,rgba(7,11,20,.97) 30%);
  }
  .nav-open .nav-left,
  .nav-open .nav-right{opacity:1;visibility:visible;transform:none}
  .nav-link{
    font-size:16.5px;
    padding:16px 0;
    border-bottom:1px solid var(--line);
    color:var(--text-2);
  }
  .nav-link.active{color:var(--accent)}
  .nav-cta{width:100%;min-height:48px;font-size:15px}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .cta-panel{grid-template-columns:1fr;padding:34px 28px;gap:26px}
  .feature-grid{grid-template-columns:1fr}
}
@media (max-width:767px){
  .metrics-grid{grid-template-columns:1fr}
  .metric{border-left:0;border-top:1px solid var(--line);padding:26px 20px}
  .metric:first-child{border-top:0}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col:last-child{grid-column:span 2}
  .footer-brand{grid-column:span 2}
  .hero-actions .btn{width:100%}
  .section-head{margin-bottom:32px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:28px}
  .hero-card{padding:22px}
  .feature-body{padding:20px}
  .faq-item summary{padding:17px 18px 17px 20px;font-size:15px}
  .faq-body{padding:0 18px 18px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-col:last-child,.footer-brand{grid-column:span 1}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .cta-panel{padding:28px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --primary:#2F6BFF;
  --primary-soft:rgba(47,107,255,.12);
  --accent:#2BE0A8;
  --orange:#FF7A3C;
  --text:#EAF0FF;
  --text-2:#9AA9C4;
  --text-3:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --warn:#FFB020;
  --err:#FF5C6C;
  --r-card:16px;
  --r-input:12px;
  --r-pill:999px;
  --shadow-1:0 8px 24px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(0,0,0,.45);
  --shadow-3:0 24px 64px rgba(47,107,255,.18);
  --sect:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:32px 32px;
  -webkit-mask-image:radial-gradient(ellipse at 60% 0%,#000 0%,transparent 72%);
  mask-image:radial-gradient(ellipse at 60% 0%,#000 0%,transparent 72%);
}
body::after{
  content:"";position:fixed;top:-220px;right:-180px;width:620px;height:620px;pointer-events:none;z-index:0;
  background:radial-gradient(circle,rgba(47,107,255,.22),transparent 66%);
  filter:blur(10px);
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{text-decoration:underline;text-underline-offset:3px}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:650;line-height:1.28;color:var(--text);letter-spacing:-.01em}
h1{font-size:clamp(30px,4vw,46px);font-weight:700}
h2{font-size:32px}
h3{font-size:22px}
h4{font-size:18px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.section{padding:var(--sect) 0;position:relative;z-index:1}
.section-head{max-width:780px;margin-bottom:40px}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:2px}
.rule{height:1px;background:var(--line);margin:0}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(7,11,20,.92),rgba(7,11,20,.62));
  border-bottom:1px solid transparent;
  transition:background .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header.is-stuck{
  background:rgba(7,11,20,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.nav-wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:76px;gap:20px}
.nav-side{display:flex;align-items:center;gap:6px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  color:var(--text-2);font-size:15px;font-weight:500;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);text-decoration:none}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--accent);
}
.nav-cta{
  margin-left:8px;display:inline-flex;align-items:center;min-height:44px;padding:0 20px;border-radius:var(--r-input);
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#04121C;font-weight:650;font-size:15px;
  box-shadow:0 0 22px rgba(47,107,255,.38);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.nav-cta:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 0 30px rgba(47,107,255,.6);filter:saturate(1.06)}
.nav-cta:active{transform:translateY(1px)}
.brand{display:flex;flex-direction:column;align-items:center;line-height:1.2;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-main{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.01em}
.brand-sub{font-size:11px;letter-spacing:.22em;color:var(--text-3);margin-top:3px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);align-items:center;justify-content:center;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:18px;height:2px;border-radius:2px;background:var(--text);position:absolute;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span::before{transform:translateY(-6px)}
.nav-toggle span::after{transform:translateY(6px)}
.site-header.nav-open .nav-toggle span{background:transparent}
.site-header.nav-open .nav-toggle span::before{transform:rotate(45deg)}
.site-header.nav-open .nav-toggle span::after{transform:rotate(-45deg)}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:44px;padding:0 24px;border-radius:var(--r-input);
  font-size:15px;font-weight:650;border:1px solid transparent;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#04121C;box-shadow:0 0 22px rgba(47,107,255,.42);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(47,107,255,.62);filter:saturate(1.06)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{
  background:rgba(47,107,255,.06);
  border-color:rgba(47,107,255,.4);
  color:var(--text);
}
.btn-outline:hover{background:rgba(47,107,255,.16);border-color:rgba(47,107,255,.7);transform:translateY(-2px)}
.btn-ghost{color:var(--primary);padding:0 6px;background:transparent}
.btn-ghost i{transition:transform .2s ease}
.btn-ghost:hover i{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ============ badges / tags ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1;
  background:rgba(43,224,168,.12);color:var(--accent);border:1px solid rgba(43,224,168,.28);
}
.badge-blue{background:rgba(47,107,255,.14);color:#8FB2FF;border-color:rgba(47,107,255,.32)}
.badge-orange{background:rgba(255,122,60,.14);color:#FFA477;border-color:rgba(255,122,60,.34)}
.badge-muted{background:rgba(255,255,255,.05);color:var(--text-3);border-color:var(--line)}

/* ============ hero ============ */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:112px 0 0}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.5;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,11,20,.98) 8%,rgba(7,11,20,.88) 46%,rgba(7,11,20,.42) 100%);
}
.cat-hero .hero-inner{position:relative;z-index:2;max-width:840px}
.cat-hero h1{margin-bottom:18px}
.cat-hero .lead{color:var(--text-2);font-size:17px;max-width:700px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-note{display:flex;align-items:center;gap:10px;margin-top:22px;color:var(--text-3);font-size:14px}
.hero-note i{color:var(--accent)}

/* metric bar */
.metric-bar{
  position:relative;z-index:2;margin-top:64px;
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  background:rgba(13,20,36,.62);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-radius:16px 16px 0 0;
}
.metric{padding:24px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric b{display:block;font-size:30px;font-weight:700;color:var(--text);letter-spacing:-.02em}
.metric b span{font-size:15px;font-weight:500;color:var(--text-3);margin-left:4px}
.metric small{display:block;margin-top:6px;color:var(--text-2);font-size:14px}

/* ============ matrix table ============ */
.matrix-wrap{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.matrix-scroll{overflow-x:auto}
.matrix{width:100%;min-width:780px;border-collapse:collapse;font-size:15px}
.matrix thead th{
  position:sticky;top:76px;z-index:3;
  background:#0F1729;
  padding:18px 20px;text-align:left;font-size:14px;font-weight:650;color:var(--text-2);
  border-bottom:1px solid var(--line-strong);letter-spacing:.02em;
}
.matrix thead th.rowhead{color:var(--text-3)}
.matrix th.rowhead{
  text-align:left;font-weight:600;color:var(--text);font-size:15px;padding:18px 20px;
  background:rgba(255,255,255,.02);white-space:nowrap;
}
.matrix td{padding:18px 20px;border-top:1px solid var(--line);color:var(--text-2);vertical-align:middle}
.matrix tbody tr:hover td{background:rgba(255,255,255,.02);color:var(--text)}
.matrix .col-rec{background:rgba(47,107,255,.08);border-left:1px solid rgba(47,107,255,.4);border-right:1px solid rgba(47,107,255,.4);color:var(--text)}
.matrix thead th.col-rec{color:#A9C2FF}
.tag-rec{
  display:inline-flex;align-items:center;height:20px;padding:0 8px;margin-right:8px;border-radius:var(--r-pill);
  background:rgba(255,122,60,.16);color:#FFA477;font-size:11px;font-weight:700;letter-spacing:.04em;
}
.metric-cell{display:flex;flex-direction:column;gap:8px;min-width:96px}
.metric-cell b{font-size:15px;color:var(--text)}
.metric-cell b em{font-style:normal;font-size:12px;color:var(--text-3);font-weight:500;margin-left:3px}
.bar{height:6px;border-radius:var(--r-pill);background:rgba(255,255,255,.08);overflow:hidden}
.bar i{display:block;height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--primary),var(--accent))}
.bar i.warnbar{background:linear-gradient(90deg,#8a6a2b,var(--warn))}
.matrix .dash{color:var(--text-3);opacity:.65}
.matrix-foot{
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  padding:18px 24px;border-top:1px solid var(--line);color:var(--text-3);font-size:13px;
}

/* ============ tier cards ============ */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px;align-items:start}
.tier-card{
  position:relative;padding:26px;border-radius:var(--r-card);
  background:var(--panel);border:1px solid var(--line);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.tier-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0;transition:opacity .25s ease;
}
.tier-card:hover{transform:translateY(-4px);border-color:rgba(47,107,255,.45);box-shadow:var(--shadow-2)}
.tier-card:hover::before{opacity:1}
.tier-card.lv1{min-height:290px}
.tier-card.lv2{min-height:350px}
.tier-card.lv3{min-height:412px;background:linear-gradient(180deg,rgba(47,107,255,.12),rgba(13,20,36,.9));border-color:rgba(47,107,255,.42);box-shadow:var(--shadow-3)}
.tier-card h3{margin:16px 0 8px}
.tier-card .tier-price{margin-top:14px;font-size:14px;color:var(--text-3)}
.tier-card .tier-price b{font-size:26px;color:var(--text);margin-right:4px;letter-spacing:-.02em}
.tier-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.tier-list li{display:flex;gap:10px;color:var(--text-2);font-size:14.5px;line-height:1.6}
.tier-list i{color:var(--accent);margin-top:5px;font-size:12px}
.tier-list li.off i{color:var(--text-3)}
.tier-list li.off{color:var(--text-3);opacity:.8}
.tier-progress{margin-top:22px}
.tier-progress .row{display:flex;justify-content:space-between;font-size:13px;color:var(--text-3);margin-bottom:8px}
.tier-progress .row b{color:var(--text)}
.tier-card .btn{margin-top:24px;width:100%}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:44px}
.step{
  position:relative;padding:26px 22px;border-radius:var(--r-card);
  background:rgba(18,28,48,.4);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:rgba(47,107,255,.42);transform:translateY(-4px)}
.step .num{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;
  background:rgba(47,107,255,.14);color:#8FB2FF;font-weight:700;font-size:14px;margin-bottom:16px;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{color:var(--text-2);font-size:14.5px}

/* ============ split feature ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split .media{
  position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-2);aspect-ratio:16/9;
}
.split .media img{width:100%;height:100%;object-fit:cover}
.split .media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(7,11,20,.7))}
.check-list{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:12px;color:var(--text-2);font-size:15px}
.check-list i{color:var(--accent);margin-top:6px;font-size:12px}
.note-card{
  margin-top:28px;padding:20px 22px;border-radius:14px;
  background:rgba(47,107,255,.07);border:1px solid rgba(47,107,255,.28);color:var(--text-2);font-size:14.5px;
}
.note-card b{color:var(--text)}

/* ============ faq ============ */
.faq{max-width:920px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:rgba(18,28,48,.4);
  margin-bottom:12px;overflow:hidden;transition:border-color .25s ease,background .25s ease;
}
.faq-item:hover{border-color:rgba(47,107,255,.34)}
.faq-item.open{border-color:rgba(47,107,255,.45);background:rgba(18,28,48,.62)}
.faq-q{
  width:100%;background:none;border:0;color:var(--text);text-align:left;
  display:flex;align-items:center;gap:14px;padding:20px 22px;font-size:16.5px;font-weight:600;
}
.faq-q::before{content:"";width:2px;align-self:stretch;border-radius:2px;background:var(--primary);transition:background .25s ease}
.faq-item.open .faq-q::before{background:var(--accent)}
.faq-q span{flex:1}
.faq-q i{color:var(--text-3);transition:transform .28s ease}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a .inner{
  max-width:760px;padding:0 22px 22px 40px;color:var(--text-2);font-size:15px;line-height:1.8;
}

/* ============ cta ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,107,255,.16),rgba(13,20,36,.86) 58%);
  padding:48px;display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;
  box-shadow:var(--shadow-2);
}
.cta-band::after{
  content:"";position:absolute;top:-140px;right:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,224,168,.22),transparent 68%);pointer-events:none;
}
.cta-band h2{margin-bottom:14px}
.cta-band p{color:var(--text-2);max-width:560px}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.cta-points span{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);font-size:13px;
}
.cta-points i{color:var(--accent);font-size:11px}

/* ============ footer ============ */
.site-footer{border-top:1px solid var(--line);margin-top:var(--sect);padding:56px 0 28px;position:relative;z-index:1;background:rgba(7,11,20,.7)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-brand .brand-main{font-size:16px}
.footer-brand p{margin-top:14px;color:var(--text-2);font-size:14px;max-width:360px}
.footer-col h4{font-size:14px;color:var(--text);letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:var(--text-2);font-size:14px}
.footer-col a:hover{color:var(--text);text-decoration:none}
.footer-col .plain{color:var(--text-3);font-size:14px}
.footer-legal{
  border-top:1px solid var(--line);padding-top:22px;display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;color:var(--text-3);font-size:13px;
}
.footer-legal .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal a{color:var(--text-3);font-size:13px}
.footer-legal a:hover{color:var(--text-2);text-decoration:none}

/* ============ responsive ============ */
@media (max-width:1439px){
  .container{max-width:1140px}
}
@media (max-width:1199px){
  .split{grid-template-columns:1fr;gap:36px}
  .tiers{grid-template-columns:repeat(3,1fr);gap:18px}
  .tier-card{padding:22px}
}
@media (max-width:1023px){
  :root{--sect:64px}
  .nav-wrap{grid-template-columns:auto 1fr auto;min-height:64px;position:relative}
  .nav-toggle{display:inline-flex;order:1}
  .brand{order:2;justify-self:center;text-align:center}
  .nav-right{order:3}
  .nav-right .nav-link{display:none}
  .nav-right .nav-cta{display:none}
  .nav-side{display:none}
  .site-header.nav-open .nav-side{
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    position:fixed;top:64px;left:0;right:0;bottom:0;
    background:rgba(7,11,20,.985);padding:20px 24px 48px;overflow-y:auto;z-index:70;
    border-top:1px solid var(--line);
  }
  .site-header.nav-open .nav-left{order:1}
  .site-header.nav-open .nav-right{order:2}
  .site-header.nav-open .nav-link{
    padding:16px 4px;font-size:17px;border-bottom:1px solid var(--line);color:var(--text);
  }
  .site-header.nav-open .nav-link.active::after{display:none}
  .site-header.nav-open .nav-link.active{color:var(--accent)}
  .site-header.nav-open .nav-cta{
    display:flex;justify-content:center;margin:22px 0 0;width:100%;
  }
  .metric-bar{grid-template-columns:repeat(2,1fr)}
  .metric{border-bottom:1px solid var(--line)}
  .metric:nth-child(2n){border-right:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:36px}
  .cta-band .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .matrix thead th{top:64px}
}
@media (max-width:767px){
  :root{--sect:48px}
  .container{padding:0 20px}
  h2{font-size:26px}
  h3{font-size:20px}
  .cat-hero{padding:64px 0 0}
  .metric-bar{margin-top:40px;border-radius:14px 14px 0 0}
  .metric{padding:18px 20px}
  .metric b{font-size:24px}
  .tiers{grid-template-columns:1fr}
  .tier-card.lv1,.tier-card.lv2,.tier-card.lv3{min-height:0}
  .steps{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .cta-band{padding:28px;border-radius:16px}
  .cta-band .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .faq-a .inner{padding:0 20px 20px 20px}
  .footer-legal{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .matrix{min-width:660px}
  .matrix thead th,.matrix td,.matrix th.rowhead{padding:14px 14px;font-size:14px}
  .brand-main{font-size:15px}
  .brand-sub{letter-spacing:.14em}
  .metric b{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --primary:#2F6BFF;
  --accent:#2BE0A8;
  --hot:#FF7A3C;
  --text:#EAF0FF;
  --text-2:#9AA9C4;
  --text-3:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --warn:#FFB020;
  --err:#FF5C6C;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --sh1:0 8px 24px rgba(0,0,0,.35);
  --sh2:0 16px 40px rgba(0,0,0,.45);
  --sh3:0 24px 64px rgba(47,107,255,.18);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(900px 480px at 88% -6%, rgba(47,107,255,.20), transparent 62%),
    radial-gradient(700px 420px at 4% 12%, rgba(43,224,168,.10), transparent 60%),
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
  background-attachment:fixed,fixed,scroll,scroll;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7FA4FF;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px;}
h1{font-size:clamp(30px,4vw,46px);line-height:1.24;}
h2{font-size:32px;line-height:1.3;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
h4{font-size:18px;line-height:1.45;font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:16px;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1140px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,11,20,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(7,11,20,.9);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  min-height:78px;
}
.brand{
  grid-column:2;
  display:flex;flex-direction:column;align-items:center;
  text-decoration:none;line-height:1.1;
}
.brand-main{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.4px;white-space:nowrap;}
.brand-sub{font-size:11px;letter-spacing:.22em;color:var(--text-3);margin-top:5px;white-space:nowrap;}
.brand:hover .brand-main{color:#fff;}
.nav-side{display:flex;align-items:center;gap:2px;}
.nav-left{grid-column:1;justify-content:flex-start;}
.nav-right{grid-column:3;justify-content:flex-end;}
.nav-link{
  position:relative;
  padding:9px 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .2s ease,background .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--text);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}
.nav-cta{
  margin-left:8px;
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{color:#04121C;transform:translateY(-2px);box-shadow:0 0 30px rgba(47,107,255,.6);filter:saturate(1.06);}
.nav-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;grid-column:1;justify-self:start;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:background .2s;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
body.nav-open .nav-toggle span{background:transparent;}
body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}

/* mobile drawer */
.mobile-panel{
  position:fixed;inset:0;z-index:200;
  background:rgba(7,11,20,.97);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:22px 24px 40px;
  transform:translateY(-100%);
  opacity:0;visibility:hidden;
  transition:transform .32s ease,opacity .32s ease,visibility .32s;
  overflow-y:auto;
}
body.nav-open .mobile-panel{transform:translateY(0);opacity:1;visibility:visible;}
.mp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.mp-title{font-size:12px;letter-spacing:.24em;color:var(--text-3);}
.mp-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-2);
}
.mp-group{margin-bottom:26px;}
.mp-group h4{font-size:12px;letter-spacing:.2em;color:var(--text-3);font-weight:600;margin-bottom:12px;text-transform:uppercase;}
.mp-group a{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 16px;margin-bottom:8px;border-radius:12px;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  color:var(--text);font-size:16px;font-weight:500;
}
.mp-group a:hover{border-color:rgba(47,107,255,.45);background:rgba(47,107,255,.1);color:var(--text);}
.mp-group a.active{color:var(--accent);border-color:rgba(43,224,168,.4);}
.mp-group a .arrow{color:var(--text-3);font-size:14px;}
.mp-cta{
  display:flex;align-items:center;justify-content:center;
  min-height:50px;border-radius:var(--r-btn);font-weight:600;color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 24px rgba(47,107,255,.4);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease,color .2s ease;
}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
}
.btn-primary:hover{color:#04121C;transform:translateY(-2px);box-shadow:0 0 32px rgba(47,107,255,.62);filter:saturate(1.06);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  color:var(--text);
  background:var(--glass);
  border:1px solid rgba(47,107,255,.4);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{color:var(--text);background:rgba(47,107,255,.12);border-color:rgba(47,107,255,.7);transform:translateY(-2px);}
.btn-text{color:var(--primary);padding:0 4px;min-height:44px;}
.btn-text:hover{color:#8FB0FF;text-decoration:underline;text-underline-offset:3px;}
.btn-lg{min-height:52px;padding:0 28px;font-size:16px;}

/* ---------- section base ---------- */
main{display:block;}
.section{padding:96px 0;position:relative;}
.section.tight{padding:72px 0;}
.sec-head{max-width:780px;margin-bottom:44px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-head h2{margin-bottom:14px;}
.sec-head p{color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.18em;color:var(--accent);
  padding:6px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(43,224,168,.28);
  background:rgba(43,224,168,.08);
  margin-bottom:16px;
}
.eyebrow.blue{color:#8FB0FF;border-color:rgba(47,107,255,.32);background:rgba(47,107,255,.1);}
.eyebrow.hot{color:#FFB08A;border-color:rgba(255,122,60,.32);background:rgba(255,122,60,.1);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:84px 0 88px;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(7,11,20,.96) 0%,rgba(7,11,20,.82) 42%,rgba(7,11,20,.32) 74%,rgba(7,11,20,.7) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover,cover;
  background-position:center,center right;
  z-index:0;
}
.hero::after{
  content:"";position:absolute;left:-120px;top:-140px;width:520px;height:420px;
  background:radial-gradient(circle,rgba(47,107,255,.28),transparent 68%);
  filter:blur(10px);z-index:0;pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
}
.hero h1{margin-bottom:20px;}
.hero h1 em{font-style:normal;color:var(--accent);}
.hero-sub{font-size:18px;color:#C6D3EC;max-width:560px;margin-bottom:28px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.chip i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

.hero-card{
  position:relative;
  background:var(--glass);
  border:1px solid rgba(255,255,255,.12);
  border-radius:20px;
  padding:26px;
  box-shadow:var(--sh2);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.hero-card::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
  border-radius:2px;
}
.hero-card h3{font-size:17px;margin-bottom:6px;}
.hero-card .hc-note{font-size:13px;color:var(--text-3);margin-bottom:18px;}
.hc-list li{
  display:flex;align-items:flex-start;gap:10px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:14px;color:var(--text-2);
}
.hc-list li:last-child{border-bottom:0;}
.hc-list .dot{
  flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
  background:rgba(43,224,168,.14);border:1px solid rgba(43,224,168,.4);
  display:flex;align-items:center;justify-content:center;
  font-size:10px;color:var(--accent);
}
.hc-list b{color:var(--text);font-weight:600;}
.hc-status{
  margin-top:18px;display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--text-2);
  background:rgba(47,107,255,.1);border:1px solid rgba(47,107,255,.28);
  border-radius:12px;padding:11px 14px;
}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(43,224,168,.8);animation:pulse 2s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}

/* ---------- stats bar ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;
}
.stat{background:rgba(13,20,36,.86);padding:26px 24px;}
.stat .k{font-size:13px;color:var(--text-3);margin-bottom:8px;}
.stat .v{font-size:30px;font-weight:700;color:var(--text);letter-spacing:.5px;}
.stat .v span{font-size:15px;color:var(--accent);margin-left:4px;font-weight:600;}
.stat .d{font-size:13px;color:var(--text-2);margin-top:6px;}

/* ---------- staggered content grid ---------- */
.grid12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.card{
  position:relative;
  background:linear-gradient(180deg,rgba(18,28,48,.72),rgba(13,20,36,.72));
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh1);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  display:flex;flex-direction:column;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;z-index:3;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:opacity .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,107,255,.45);box-shadow:var(--sh3);}
.card:hover::before{opacity:1;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:12px;margin:14px 14px 0;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1;}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:5px 11px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.04);
}
.badge.open{color:#8CF0D1;border-color:rgba(43,224,168,.38);background:rgba(43,224,168,.1);}
.badge.std{color:#9DBCFF;border-color:rgba(47,107,255,.4);background:rgba(47,107,255,.12);}
.badge.vip{color:#FFC09A;border-color:rgba(255,122,60,.42);background:rgba(255,122,60,.12);}
.badge.lock{color:var(--text-3);}
.card h3{font-size:19px;margin-bottom:10px;}
.card p.excerpt{font-size:14.5px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}
.card-meta .go{color:var(--primary);font-weight:600;}
.card-meta .go:hover{text-decoration:underline;text-underline-offset:3px;}
.card.locked .card-media::after{
  content:"";position:absolute;inset:0;background:rgba(7,11,20,.55);
  transition:background .3s ease;
}
.card.locked:hover .card-media::after{background:rgba(7,11,20,.32);}
.lock-flag{
  position:absolute;left:14px;top:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 11px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;color:#FFE0CE;
  background:rgba(255,122,60,.18);border:1px solid rgba(255,122,60,.5);
  backdrop-filter:blur(6px);
}
.lock-flag svg{width:12px;height:12px;}
.card.locked .card-media .lock-center{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(7,11,20,.6);border:1px solid rgba(255,255,255,.18);
  color:var(--text);backdrop-filter:blur(6px);
}
.card.locked .card-media .lock-center svg{width:18px;height:18px;}
.card-big{grid-column:span 6;}
.card-small{grid-column:span 3;}
.card-std{grid-column:span 3;}
.card-big .card-media{aspect-ratio:16/9;}
.card-big h3{font-size:24px;}
.card-big p.excerpt{-webkit-line-clamp:3;font-size:15.5px;}
.unlock-tip{
  font-size:12.5px;color:var(--warn);
  display:inline-flex;align-items:center;gap:6px;
}
.mini-bar{
  height:6px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:14px;
}
.mini-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--primary),var(--accent));}
.mini-bar.hot i{background:linear-gradient(90deg,var(--hot),#FFB08A);}

/* ---------- unlock compare strip ---------- */
.strip{
  background:linear-gradient(180deg,rgba(18,28,48,.6),rgba(13,20,36,.5));
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:8px 0;overflow:hidden;
}
.strip-row{
  display:grid;grid-template-columns:220px 1fr 1fr 1fr;
  align-items:center;gap:20px;
  padding:20px 26px;border-bottom:1px solid var(--line);
}
.strip-row:last-child{border-bottom:0;}
.strip-row.head{background:rgba(47,107,255,.06);}
.strip-row.head .col-title{color:var(--text-2);font-size:13px;letter-spacing:.06em;}
.strip-row .row-title{font-size:15px;font-weight:600;color:var(--text);}
.strip-row .row-title small{display:block;font-size:12.5px;color:var(--text-3);font-weight:400;margin-top:4px;}
.tier-cell{display:flex;flex-direction:column;gap:8px;}
.tier-cell .val{font-size:15px;color:var(--text);font-weight:600;}
.tier-cell .val.muted{color:var(--text-3);font-weight:400;}
.tier-cell .bar{height:7px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden;}
.tier-cell .bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,rgba(47,107,255,.85),rgba(43,224,168,.85));}
.tier-cell.vip .val{color:#FFC09A;}
.tier-cell.vip .bar i{background:linear-gradient(90deg,var(--hot),#FFC09A);}
.tier-cell .tagline{font-size:12px;color:var(--text-3);}

/* ---------- services ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.svc{
  padding:28px 26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(12px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.svc:hover{transform:translateY(-4px);border-color:rgba(47,107,255,.45);box-shadow:var(--sh2);}
.svc .ico{
  width:46px;height:46px;border-radius:12px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,107,255,.14);border:1px solid rgba(47,107,255,.35);color:#9DBCFF;
}
.svc .ico svg{width:20px;height:20px;}
.svc h3{font-size:18px;margin-bottom:10px;}
.svc p{font-size:14.5px;color:var(--text-2);}
.svc ul{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.svc ul li{font-size:13.5px;color:var(--text-2);padding-left:16px;position:relative;}
.svc ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.85;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step{
  position:relative;padding:28px 24px 24px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(18,28,48,.62),rgba(13,20,36,.42));
  border:1px solid var(--line);
}
.step::after{
  content:"";position:absolute;right:-13px;top:52px;width:26px;height:1px;
  background:linear-gradient(90deg,rgba(47,107,255,.6),transparent);
}
.step:last-child::after{display:none;}
.step .no{
  width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 18px rgba(47,107,255,.4);margin-bottom:16px;
}
.step h3{font-size:17px;margin-bottom:9px;}
.step p{font-size:14px;color:var(--text-2);}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
  background:rgba(18,28,48,.4);overflow:hidden;
  transition:border-color .25s ease,background .25s ease;
}
.faq-item:hover{border-color:rgba(47,107,255,.35);}
.faq-item.open{background:rgba(18,28,48,.7);border-color:rgba(47,107,255,.4);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:var(--primary);transition:background .25s ease;
}
.faq-item.open .faq-q::before{background:var(--accent);}
.faq-arrow{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .3s ease;
}
.faq-arrow::before,.faq-arrow::after{
  content:"";position:absolute;left:5px;top:10px;width:12px;height:2px;border-radius:2px;background:var(--text-2);
}
.faq-arrow::before{transform:rotate(45deg);}
.faq-arrow::after{transform:rotate(-45deg);left:6px;}
.faq-item.open .faq-arrow::before{transform:rotate(-45deg);background:var(--accent);}
.faq-item.open .faq-arrow::after{transform:rotate(45deg);background:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a-inner{padding:0 22px 22px;max-width:760px;font-size:15px;line-height:1.8;color:var(--text-2);}
.faq-a-inner b{color:var(--text);font-weight:600;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:20px;border:1px solid rgba(47,107,255,.32);
  background:linear-gradient(120deg,rgba(18,28,48,.92),rgba(13,20,36,.72));
  padding:48px;
  display:grid;grid-template-columns:1.35fr .65fr;gap:36px;align-items:center;
  box-shadow:var(--sh2);
}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-110px;width:420px;height:360px;
  background:radial-gradient(circle,rgba(47,107,255,.35),transparent 68%);
  filter:blur(8px);
}
.cta-band::after{
  content:"";position:absolute;left:-60px;bottom:-120px;width:340px;height:300px;
  background:radial-gradient(circle,rgba(43,224,168,.22),transparent 70%);
  filter:blur(8px);
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:30px;margin-bottom:14px;}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:620px;}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:24px;
  border-top:1px solid var(--line);
  background:rgba(9,14,26,.86);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid var(--line);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;}
.footer-brand .brand-main{font-size:18px;}
.footer-brand .brand-sub{margin-top:6px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-3);line-height:1.8;max-width:340px;}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--text);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--text-2);font-size:14px;}
.footer-col a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.footer-col .plain{color:var(--text-3);font-size:13.5px;line-height:1.7;}
.footer-legal{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:var(--text-3);
}
.footer-legal .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-legal a{color:var(--text-3);font-size:13px;}
.footer-legal a:hover{color:var(--primary);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-inner{gap:36px;}
  .strip-row{grid-template-columns:180px 1fr 1fr 1fr;gap:16px;padding:18px 20px;}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{grid-template-columns:auto 1fr auto;min-height:68px;}
  .brand{justify-self:center;}
  .section{padding:64px 0;}
  .section.tight{padding:52px 0;}
  .hero{padding:56px 0 64px;}
  .hero-inner{grid-template-columns:1fr;}
  .hero-card{max-width:640px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .svc-grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .step::after{display:none;}
  .card-big{grid-column:span 12;}
  .card-small{grid-column:span 6;}
  .card-std{grid-column:span 6;}
  .cta-band{grid-template-columns:1fr;padding:36px;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  h2{font-size:26px;}
  .container{padding:0 18px;}
  .section{padding:48px 0;}
  .section.tight{padding:44px 0;}
  .sec-head{margin-bottom:30px;}
  .stats{grid-template-columns:1fr 1fr;}
  .stat{padding:20px 16px;}
  .stat .v{font-size:24px;}
  .svc-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .card-small,.card-std{grid-column:span 12;}
  .card-body{padding:18px;}
  .strip{padding:4px 0;}
  .strip-row{grid-template-columns:1fr;gap:12px;padding:18px;}
  .strip-row.head{display:none;}
  .strip-row .row-title small{margin-top:2px;}
  .tier-cell{flex-direction:row;align-items:center;gap:12px;}
  .tier-cell .bar{flex:1;}
  .tier-cell .val{min-width:96px;}
  .faq-q{font-size:15.5px;padding:18px;}
  .faq-a-inner{padding:0 18px 20px;}
  .cta-band{padding:26px;}
  .cta-band h2{font-size:24px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px;}
  .hero-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:479px){
  h1{font-size:27px;}
  .hero-sub{font-size:16px;}
  .brand-main{font-size:15px;}
  .brand-sub{font-size:10px;letter-spacing:.16em;}
  .card-big h3{font-size:20px;}
  .stats{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --bg:#070B14;
  --panel:#0D1424;
  --glass:rgba(18,28,48,.55);
  --primary:#2F6BFF;
  --accent:#2BE0A8;
  --flare:#FF7A3C;
  --text:#EAF0FF;
  --muted:#9AA9C4;
  --weak:#5F6E8C;
  --line:rgba(255,255,255,.08);
  --warn:#FFB020;
  --err:#FF5C6C;
  --r-card:16px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 8px 24px rgba(0,0,0,.35);
  --sh-2:0 16px 40px rgba(0,0,0,.45);
  --sh-3:0 24px 64px rgba(47,107,255,.18);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:radial-gradient(ellipse at 50% 0%,rgba(0,0,0,.9),transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,rgba(0,0,0,.9),transparent 78%);
}
body::after{
  content:"";
  position:fixed;
  top:-260px;
  right:-180px;
  width:720px;
  height:720px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,107,255,.20),transparent 68%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{text-decoration:underline;text-underline-offset:3px}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:8px}
h1,h2,h3,h4{line-height:1.3;margin:0;font-weight:700}
h1{font-size:clamp(30px,4vw,46px);letter-spacing:-.6px}
h2{font-size:clamp(24px,2.4vw,32px);font-weight:650}
h3{font-size:22px;font-weight:600}
h4{font-size:18px;font-weight:600}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
.container{width:min(1280px,100% - 48px);margin-inline:auto;position:relative}
@media (min-width:1200px) and (max-width:1439px){.container{width:min(1140px,100% - 48px)}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,rgba(7,11,20,.92),rgba(7,11,20,.55));
  border-bottom:1px solid transparent;
  transition:background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-stuck{
  background:rgba(7,11,20,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  min-height:76px;
}
.nav-side{display:flex;align-items:center;gap:6px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s ease;
}
.nav-link:hover{color:var(--text);text-decoration:none;background:rgba(47,107,255,.08)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--text)}
.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:2px;
  text-align:center;
  text-decoration:none;
}
.brand:hover{text-decoration:none}
.brand-main{
  font-size:19px;
  font-weight:700;
  letter-spacing:.4px;
  background:linear-gradient(100deg,#EAF0FF 10%,#8FB6FF 55%,#2BE0A8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;
  letter-spacing:.24em;
  color:var(--weak);
  white-space:nowrap;
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 20px;
  margin-left:10px;
  border-radius:var(--r-input);
  font-size:15px;
  font-weight:600;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 20px rgba(47,107,255,.4);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 0 28px rgba(47,107,255,.62);
  filter:saturate(1.06);
}
.nav-cta:active{transform:translateY(1px)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-close{display:none}
.nav-quick-cta{display:none}

/* ---------- 页首小条 ---------- */
.page-hero{
  position:relative;
  z-index:1;
  padding:72px 0 64px;
  background-image:linear-gradient(90deg,rgba(7,11,20,.96) 0%,rgba(7,11,20,.82) 46%,rgba(7,11,20,.42) 100%),url(/assets/images/backpic/back-1.webp);
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.6),transparent);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--weak);
  margin-bottom:20px;
}
.crumbs a{color:var(--muted)}
.crumbs .sep{opacity:.6}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:40px;
  align-items:center;
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--accent);
  background:rgba(43,224,168,.10);
  border:1px solid rgba(43,224,168,.32);
  margin-bottom:18px;
}
.hero-lead{
  color:var(--muted);
  font-size:17px;
  max-width:620px;
  margin-top:16px;
}
.hero-subline{
  color:var(--text);
  font-size:17px;
  font-weight:600;
  margin-top:10px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:44px;
  padding:12px 24px;
  border-radius:var(--r-input);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,filter .2s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 22px rgba(47,107,255,.45);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(47,107,255,.62);filter:saturate(1.06)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--text);
  background:rgba(18,28,48,.55);
  border-color:rgba(47,107,255,.4);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.btn-ghost:hover{background:rgba(47,107,255,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;filter:grayscale(.4)}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--accent);
}
.link-arrow:hover{text-decoration:none;color:#5CF0C2}

.hero-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-2);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  position:relative;
  overflow:hidden;
}
.hero-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.hero-card h3{font-size:18px;margin-bottom:6px}
.hero-card .card-note{font-size:13px;color:var(--weak);margin-bottom:18px}
.entry-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.entry-row:last-of-type{border-bottom:0}
.entry-row .k{color:var(--muted)}
.entry-row .v{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}
.status-line{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:18px;
  padding:10px 14px;
  border-radius:var(--r-input);
  font-size:13px;
  color:var(--accent);
  background:rgba(43,224,168,.08);
  border:1px solid rgba(43,224,168,.24);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(43,224,168,.8);
  flex:none;
}

/* ---------- 统计条 ---------- */
.stats-band{
  position:relative;
  z-index:1;
  border-bottom:1px solid var(--line);
  background:rgba(13,20,36,.55);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.stat-cell{
  padding:28px 24px;
  border-right:1px solid var(--line);
}
.stat-cell:last-child{border-right:0}
.stat-num{
  font-size:32px;
  font-weight:700;
  color:var(--text);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.5px;
  line-height:1.1;
}
.stat-num span{font-size:16px;color:var(--muted);margin-left:4px;font-weight:500}
.stat-label{font-size:13px;color:var(--weak);margin-top:8px}

/* ---------- 主体两栏 ---------- */
.section{position:relative;z-index:1;padding:88px 0}
.section.tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--primary);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head p{color:var(--muted);margin-top:14px}

.support-layout{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.toc{
  position:sticky;
  top:108px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:18px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--sh-1);
}
.toc h3{font-size:14px;color:var(--weak);letter-spacing:.1em;margin-bottom:14px;font-weight:600}
.toc a{
  display:block;
  padding:10px 14px;
  font-size:14px;
  color:var(--muted);
  border-left:2px solid var(--line);
  border-radius:0 8px 8px 0;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc a:hover{color:var(--text);background:rgba(47,107,255,.08);text-decoration:none;border-left-color:rgba(47,107,255,.5)}
.toc a.active{color:var(--text);border-left-color:var(--accent);background:rgba(47,107,255,.1)}
.toc .toc-foot{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--weak);
}

.faq-group{margin-bottom:44px;scroll-margin-top:120px}
.faq-group:last-child{margin-bottom:0}
.group-head{
  display:flex;
  align-items:baseline;
  gap:12px;
  margin-bottom:18px;
}
.group-head h3{font-size:22px}
.group-head .group-count{
  font-size:12px;
  color:var(--accent);
  background:rgba(43,224,168,.1);
  border:1px solid rgba(43,224,168,.28);
  border-radius:var(--r-pill);
  padding:2px 10px;
  font-variant-numeric:tabular-nums;
}
.faq-item{
  border:1px solid var(--line);
  border-left:2px solid var(--primary);
  border-radius:0 var(--r-card) var(--r-card) 0;
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  margin-bottom:12px;
  transition:border-color .24s ease,box-shadow .24s ease,transform .24s ease;
}
.faq-item:hover{border-color:rgba(47,107,255,.35);border-left-color:var(--primary)}
.faq-item[open]{
  border-left-color:var(--accent);
  box-shadow:var(--sh-1);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  list-style:none;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#BFD3FF}
.faq-arrow{
  flex:none;
  width:9px;height:9px;
  margin-right:6px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .26s ease,border-color .26s ease;
}
.faq-item[open] .faq-arrow{transform:rotate(-135deg);border-color:var(--accent)}
.faq-answer{
  padding:0 22px 20px;
  max-width:760px;
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}
.faq-answer strong{color:var(--text);font-weight:600}

/* ---------- 联系表单 ---------- */
.contact-band{
  position:relative;
  z-index:1;
  padding:88px 0;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,20,36,.6),rgba(7,11,20,.9));
}
.contact-grid{
  display:grid;
  grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:48px;
  align-items:start;
}
.contact-info h2{font-size:clamp(24px,2.4vw,32px)}
.contact-info p{color:var(--muted);margin-top:14px}
.info-list{margin-top:28px;display:grid;gap:14px}
.info-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:14px;
  color:var(--muted);
  padding:14px 16px;
  border:1px solid var(--line);
  border-radius:var(--r-input);
  background:rgba(18,28,48,.4);
}
.info-list .ico{
  flex:none;
  width:26px;height:26px;
  border-radius:8px;
  display:grid;place-items:center;
  font-size:13px;
  color:var(--accent);
  background:rgba(43,224,168,.1);
  border:1px solid rgba(43,224,168,.24);
}
.form-card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px;
  box-shadow:var(--sh-2);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
}
.form-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.field{display:flex;flex-direction:column}
.field.full{grid-column:1 / -1}
.field label{font-size:13px;color:var(--muted);margin-bottom:8px}
.field input,.field textarea{
  width:100%;
  background:rgba(9,15,28,.8);
  border:1px solid var(--line);
  border-radius:var(--r-input);
  padding:12px 14px;
  font-size:15px;
  color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:128px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--weak)}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(47,107,255,.16);
  background:rgba(13,20,36,.9);
}
.field .hint{font-size:13px;color:var(--err);margin-top:6px;display:none}
.field.error input,.field.error textarea{border-color:var(--err)}
.field.error .hint{display:block}
.form-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  margin-top:24px;
}
.form-foot .tip{font-size:13px;color:var(--weak)}
.form-msg{
  margin-top:20px;
  padding:14px 16px;
  border-radius:var(--r-input);
  font-size:14px;
  display:none;
}
.form-msg.success{
  display:block;
  color:var(--accent);
  background:rgba(43,224,168,.08);
  border:1px solid rgba(43,224,168,.3);
  border-top:2px solid var(--accent);
}
.form-msg.error{
  display:block;
  color:var(--err);
  background:rgba(255,92,108,.08);
  border:1px solid rgba(255,92,108,.3);
}

/* ---------- CTA ---------- */
.cta-band{position:relative;z-index:1;padding:0 0 96px}
.cta-card{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:32px;
  align-items:center;
  padding:44px;
  border-radius:var(--r-card);
  border:1px solid rgba(47,107,255,.32);
  background:linear-gradient(120deg,rgba(18,28,48,.85),rgba(13,20,36,.7));
  box-shadow:var(--sh-3);
}
.cta-card::after{
  content:"";
  position:absolute;
  top:-140px;right:-80px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,107,255,.28),transparent 66%);
  pointer-events:none;
}
.cta-card h2{font-size:clamp(24px,2.6vw,32px)}
.cta-card p{color:var(--muted);margin-top:14px;max-width:640px}
.cta-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:20px;
  font-size:14px;
  color:var(--muted);
}
.cta-points span{display:inline-flex;align-items:center;gap:8px}
.cta-points span::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px rgba(43,224,168,.8);
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 配图区 ---------- */
.figure-band{
  position:relative;
  z-index:1;
  padding:0 0 88px;
}
.figure-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.figure-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.figure-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,107,255,.45);
  box-shadow:var(--sh-2);
}
.figure-media{
  position:relative;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border-radius:12px 12px 0 0;
  background:#0A1120;
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure-body{padding:22px 24px 26px}
.figure-body h3{font-size:18px;margin-bottom:8px}
.figure-body p{font-size:14px;color:var(--muted);margin:0}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.badge{
  font-size:12px;
  padding:3px 10px;
  border-radius:var(--r-pill);
  color:var(--primary);
  background:rgba(47,107,255,.12);
  border:1px solid rgba(47,107,255,.3);
}
.badge.accent{color:var(--accent);background:rgba(43,224,168,.1);border-color:rgba(43,224,168,.3)}
.badge.flare{color:var(--flare);background:rgba(255,122,60,.1);border-color:rgba(255,122,60,.32)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  border-top:1px solid var(--line);
  background:rgba(9,14,26,.9);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand{display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.footer-brand .brand-main{font-size:18px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:360px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col .plain{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--primary);text-decoration:none}
.footer-col .plain{display:block;line-height:1.7}
.footer-legal{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:var(--weak);
}
.footer-legal .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-legal a{color:var(--muted);font-size:13px}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .section{padding:76px 0}
  .support-layout{gap:32px;grid-template-columns:230px minmax(0,1fr)}
}
@media (max-width:1023px){
  .nav-wrap{
    position:fixed;
    inset:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:88px 22px 36px;
    min-height:auto;
    background:rgba(7,11,20,.98);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    transform:translateX(100%);
    transition:transform .32s cubic-bezier(.4,.16,.2,1);
    overflow-y:auto;
    z-index:80;
  }
  body.nav-open .nav-wrap{transform:translateX(0)}
  body.nav-open{overflow:hidden}
  .nav-side{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .nav-left,.nav-right{justify-content:flex-start}
  .nav-left::before{
    content:"账户与权益";
    display:block;
    font-size:12px;
    letter-spacing:.16em;
    color:var(--weak);
    padding:8px 12px 4px;
  }
  .nav-right::before{
    content:"内容与帮助";
    display:block;
    font-size:12px;
    letter-spacing:.16em;
    color:var(--weak);
    padding:16px 12px 4px;
  }
  .nav-link{
    padding:14px 12px;
    font-size:16px;
    border-radius:12px;
    color:var(--text);
  }
  .nav-link::after{display:none}
  .nav-link:hover,.nav-link.active{background:rgba(47,107,255,.12)}
  .nav-cta{
    margin:22px 0 0;
    width:100%;
    min-height:48px;
  }
  .nav-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    position:fixed;
    left:16px;
    top:16px;
    width:44px;height:44px;
    z-index:90;
    border-radius:12px;
    border:1px solid var(--line);
    background:rgba(18,28,48,.7);
  }
  .nav-toggle span{
    display:block;
    width:18px;height:2px;
    border-radius:2px;
    background:var(--text);
    position:relative;
  }
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";
    position:absolute;left:0;
    width:18px;height:2px;
    border-radius:2px;
    background:var(--text);
    transition:transform .24s ease;
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}
  .brand{
    position:fixed;
    left:50%;
    top:14px;
    transform:translateX(-50%);
    z-index:90;
  }
  .nav-close{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    position:fixed;
    right:18px;
    top:16px;
    width:44px;height:44px;
    border-radius:12px;
    border:1px solid var(--line);
    background:rgba(18,28,48,.7);
    color:var(--text);
    font-size:20px;
    line-height:1;
    cursor:pointer;
    z-index:90;
  }
  .nav-quick-cta{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    position:fixed;
    right:72px;
    top:20px;
    z-index:85;
    font-size:13px;
    font-weight:600;
    color:var(--accent);
    padding:6px 12px;
    border-radius:var(--r-pill);
    border:1px solid rgba(43,224,168,.36);
    background:rgba(43,224,168,.1);
  }
  .nav-quick-cta:hover{text-decoration:none;background:rgba(43,224,168,.18)}
  body.nav-open .nav-quick-cta{display:none}
  .nav-wrap > .brand{position:fixed}
  .site-header{background:rgba(7,11,20,.86);backdrop-filter:blur(12px);border-bottom-color:var(--line)}
  .nav-wrap .brand{align-self:center}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero{padding:56px 0 52px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-cell:nth-child(2){border-right:0}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .support-layout{grid-template-columns:1fr;gap:28px}
  .toc{position:static}
  .toc ul{display:grid;grid-template-columns:repeat(2,1fr);gap:4px}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .cta-card{grid-template-columns:1fr;padding:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .figure-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767px){
  .container{width:min(100% - 32px,640px)}
  .section{padding:64px 0}
  .page-hero{padding:44px 0 44px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-cell{padding:22px 18px}
  .stat-num{font-size:26px}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:22px}
  .faq-item summary{padding:16px 18px;font-size:15px}
  .faq-answer{padding:0 18px 18px}
  .figure-grid{grid-template-columns:1fr}
  .cta-band{padding-bottom:72px}
}
@media (max-width:520px){
  .container{width:calc(100% - 28px)}
  .stats-grid{grid-template-columns:1fr}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line)}
  .stat-cell:last-child{border-bottom:0}
  .toc ul{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .group-head{flex-wrap:wrap;gap:8px}
  .nav-quick-cta{right:64px;top:21px;font-size:12px;padding:5px 10px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}