/* roulang page: index */
:root{
  --bg:#0d0a13;
  --bg-alt:#100c18;
  --panel:#161020;
  --panel-2:#1d1629;
  --text:#f5f1ea;
  --muted:#a79fb8;
  --line:rgba(255,255,255,.09);
  --brand:#ffc247;
  --brand-2:#ff7a45;
  --grad:linear-gradient(135deg,#ffc247,#ff7a45);
  --r-xl:26px;
  --r-lg:20px;
  --r-md:14px;
  --shadow:0 20px 46px rgba(0,0,0,.45);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.75 system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,p{margin:0}
ul{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
section[id]{scroll-margin-top:86px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(13,10,19,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.2px;min-height:44px}
.logo-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:var(--grad);color:#26130a;font-size:17px;font-weight:800;
}
.nav ul{display:flex;align-items:center;gap:4px}
.nav a{
  display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:999px;
  color:var(--muted);font-size:15px;transition:color .2s,background .2s;
}
.nav a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav a.active{color:#2a1400;background:var(--grad);font-weight:600}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;
}
.btn-primary{background:var(--grad);color:#26130a;box-shadow:0 10px 26px rgba(255,122,69,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(255,122,69,.36)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.btn-sm{min-height:44px;padding:0 20px;font-size:14.5px}

/* hero */
.hero{position:relative;overflow:hidden;padding:64px 0 76px;isolation:isolate}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.22;z-index:-2}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(13,10,19,.55) 0%,rgba(13,10,19,.85) 55%,var(--bg) 96%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;
  border:1px solid rgba(255,194,71,.4);color:var(--brand);font-size:13.5px;margin-bottom:20px;
}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand)}
.hero h1{font-size:clamp(30px,4vw,48px);line-height:1.22;letter-spacing:-.5px;font-weight:800}
.hero h1 em{
  font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{margin-top:20px;color:#cfc7dd;font-size:16.5px;line-height:1.85;max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:24px;font-size:14.5px;color:var(--muted)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-2)}

.hero-panel{
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--r-xl);padding:26px;box-shadow:var(--shadow);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.panel-head h2{font-size:17px}
.panel-head span{font-size:13px;color:var(--brand);border:1px solid rgba(255,194,71,.35);padding:3px 10px;border-radius:999px}
.ring{
  width:136px;height:136px;border-radius:50%;margin:0 auto 20px;
  background:conic-gradient(from 200deg,#ffc247,#ff7a45,rgba(255,255,255,.07) 72%);
  display:grid;place-items:center;
}
.ring-inner{
  width:106px;height:106px;border-radius:50%;background:var(--panel);display:grid;place-items:center;
  text-align:center;font-size:13px;color:var(--muted);line-height:1.5;padding:8px;
}
.ring-inner strong{display:block;color:var(--text);font-size:15px;margin-bottom:2px}
.tiers li{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line)}
.tiers li:last-child{border-bottom:0;padding-bottom:0}
.tier-name{font-size:14.5px;font-weight:600;white-space:nowrap}
.tier-note{font-size:13px;color:var(--muted);text-align:right;line-height:1.6}
.hero-panel .btn{width:100%;margin-top:18px}

/* sections */
section.block{padding:76px 0}
section.alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.3px;font-weight:800}
.section-head h2 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.85}

/* kpi */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kpi{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px 22px;
  transition:transform .25s,border-color .25s;
}
.kpi:hover{transform:translateY(-4px);border-color:rgba(255,194,71,.35)}
.kpi span{display:block;font-size:13px;color:var(--muted);letter-spacing:.4px}
.kpi strong{display:block;margin-top:10px;font-size:21px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.kpi p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.65}

/* cards */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:12px;transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(255,194,71,.3)}
.thumb{position:relative;aspect-ratio:3/4;border-radius:var(--r-md);overflow:hidden;background:#221a30}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .thumb img{transform:scale(1.06)}
.badge{
  position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:999px;
  background:var(--grad);color:#26130a;font-size:12px;font-weight:700;
}
.score{
  position:absolute;right:10px;bottom:10px;padding:2px 10px;border-radius:999px;
  background:rgba(0,0,0,.68);color:var(--brand);font-size:12.5px;font-weight:700;
}
.card h3{margin:12px 4px 0;font-size:16px;font-weight:700}
.card p{margin:6px 4px 4px;font-size:14px;line-height:1.65;color:var(--muted)}

/* channels */
.channel{
  display:flex;flex-direction:column;gap:8px;min-height:100%;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
  transition:transform .25s,border-color .25s,background .25s;
}
.channel:hover{transform:translateY(-4px);border-color:rgba(255,194,71,.38);background:var(--panel-2)}
.channel h3{font-size:17px}
.channel p{font-size:14px;color:var(--muted);line-height:1.7}
.channel .go{margin-top:auto;padding-top:12px;font-size:14px;color:var(--brand);font-weight:600}

/* services */
.service{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
  display:flex;flex-direction:column;gap:10px;
}
.service-icon{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  background:rgba(255,194,71,.12);color:var(--brand);font-weight:800;font-size:15px;
}
.service h3{font-size:16.5px}
.service p{font-size:14px;color:var(--muted);line-height:1.7}

/* compare */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
thead th{background:rgba(255,255,255,.04);font-size:14px;color:var(--muted);font-weight:600}
tbody tr:last-child td{border-bottom:0}
tbody td:first-child{font-weight:600}
td.mine{color:var(--brand)}
tbody tr:hover{background:rgba(255,255,255,.03)}

/* rank */
.rank{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.rank li{
  display:grid;grid-template-columns:46px 1fr auto auto auto;align-items:center;gap:14px;
  padding:14px 20px;border-bottom:1px solid var(--line);transition:background .2s;
}
.rank li:last-child{border-bottom:0}
.rank li:hover{background:rgba(255,255,255,.035)}
.no{
  width:30px;height:30px;border-radius:10px;display:grid;place-items:center;
  background:rgba(255,255,255,.06);font-size:14px;font-weight:700;color:var(--muted);
}
.rank li:nth-child(-n+3) .no{background:var(--grad);color:#26130a}
.rank-name{font-size:15.5px;font-weight:600}
.rank-heat{font-size:13.5px;color:var(--muted)}
.rank-score{font-size:14px;font-weight:700;color:var(--brand)}
.chip{font-size:12.5px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 10px;white-space:nowrap}

/* creators */
.creator{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px}
.creator img{width:56px;height:56px;border-radius:50%;object-fit:cover;flex:none;border:2px solid rgba(255,194,71,.35)}
.creator h3{font-size:15.5px}
.creator p{font-size:13.5px;color:var(--muted);margin-top:2px}

/* timeline */
.timeline{border-left:1px solid var(--line);margin-left:8px;padding-left:26px}
.timeline li{position:relative;padding-bottom:26px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-32px;top:8px;width:10px;height:10px;border-radius:50%;
  background:var(--grad);box-shadow:0 0 0 4px rgba(255,194,71,.14);
}
.timeline .when{font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.4px}
.timeline h3{margin-top:6px;font-size:16.5px}
.timeline p{margin-top:6px;font-size:14px;color:var(--muted);line-height:1.7}

/* news */
.news-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:12px;transition:transform .25s,border-color .25s}
.news-card:hover{transform:translateY(-4px);border-color:rgba(255,194,71,.32)}
.news-thumb{aspect-ratio:16/9;border-radius:var(--r-md);overflow:hidden;background:#221a30}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-card h3{margin:12px 4px 0;font-size:15.5px;line-height:1.6}
.news-card p{margin:6px 4px 4px;font-size:14px;color:var(--muted);line-height:1.65}

/* assure */
.assure-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:20px}
.assure{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px}
.assure-icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,122,69,.14);color:var(--brand-2);font-weight:800;font-size:15px;margin-bottom:12px;
}
.assure h3{font-size:15.5px}
.assure p{margin-top:6px;font-size:14px;color:var(--muted);line-height:1.65}

/* faq */
.faq{display:grid;gap:12px;max-width:900px}
details{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);padding:0 20px;transition:border-color .2s}
details[open]{border-color:rgba(255,194,71,.35)}
summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;cursor:pointer;font-size:15.5px;font-weight:600;list-style:none;
}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--brand);font-size:20px;font-weight:700;line-height:1}
details[open] summary::after{content:"−"}
details p{padding:0 0 18px;font-size:14.5px;color:var(--muted);line-height:1.8}

/* join */
.join{
  background:radial-gradient(120% 140% at 15% 0%,rgba(255,194,71,.18),transparent 55%),var(--panel);
  border:1px solid rgba(255,194,71,.28);border-radius:var(--r-xl);
  padding:48px 40px;text-align:center;
}
.join h2{font-size:clamp(22px,2.8vw,30px);font-weight:800}
.join p{margin:14px auto 0;max-width:660px;color:var(--muted);font-size:15.5px;line-height:1.85}
.join-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:26px}
.join-note{margin-top:16px;font-size:13.5px;color:var(--muted)}

/* footer */
.site-footer{background:#0a0810;border-top:1px solid var(--line);padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.8;max-width:34ch}
.footer-col h3{font-size:14.5px;margin-bottom:14px;color:var(--text)}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s;display:inline-flex;align-items:center;min-height:32px}
.footer-col a:hover{color:var(--brand)}
.copyright{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;
  font-size:13.5px;color:var(--muted);text-align:center;
}

/* responsive */
@media (max-width:1024px){
  .hero{padding:52px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  section.block{padding:60px 0}
}
@media (max-width:768px){
  .header-inner{flex-wrap:wrap;padding:8px 0}
  .nav{order:3;width:100%;overflow-x:auto;scrollbar-width:none}
  .nav::-webkit-scrollbar{display:none}
  .nav ul{gap:2px;padding-bottom:2px}
  .nav a{white-space:nowrap;font-size:14.5px;padding:0 12px}
  .nav-cta{display:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .rank li{grid-template-columns:40px 1fr auto;gap:10px;padding:13px 16px}
  .rank-heat,.rank-score{display:none}
  .join{padding:36px 22px}
  .hero h1{font-size:30px}
  .lead{font-size:15.5px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .kpi-grid{grid-template-columns:1fr}
  .grid-4{gap:14px}
  .card{padding:10px}
  .card h3{font-size:15px}
  .hero-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  section.block{padding:48px 0}
  .rank li{grid-template-columns:34px 1fr;gap:10px}
  .rank .chip{display:none}
}