/* roulang page: index */
:root{
  --ink:#231910;
  --ink2:#6b5c4c;
  --line:#eddfca;
  --paper:#fffaf1;
  --card:#fff;
  --brand:#ef7a1c;
  --brand-d:#c95c07;
  --brand-soft:#fdeedd;
  --plum:#3a1f3d;
  --plum-soft:#f3e9f4;
  --r:16px;
  --sh:0 8px 26px rgba(88,52,16,.08);
  --sh-h:0 16px 38px rgba(88,52,16,.16);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;background:var(--paper);color:var(--ink);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:min(1180px,92%);margin:0 auto}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,250,241,.94);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:14px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:.5px;flex:0 0 auto}
.logo-mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,#ffb01f,var(--brand));color:#fff;font-size:17px;font-weight:800;box-shadow:0 6px 16px rgba(239,122,28,.34)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{padding:9px 13px;border-radius:999px;font-size:15px;color:var(--ink2);white-space:nowrap;transition:.18s}
.nav-links a:hover{background:var(--brand-soft);color:var(--brand-d)}
.nav-links a.active{background:var(--brand);color:#fff;box-shadow:0 6px 14px rgba(239,122,28,.28)}

/* hero */
.hero{position:relative;color:#fff;padding:74px 0 64px;background:url("/assets/images/backpic/back-1.jpg") center/cover no-repeat;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(38,18,48,.95) 0%,rgba(52,24,58,.84) 48%,rgba(196,92,20,.62) 100%)}
.hero .container{position:relative;z-index:1}
.hero-tag{display:inline-block;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);font-size:13px;letter-spacing:1px;color:#ffe3c4}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.2;margin-top:18px;letter-spacing:1px}
.hero h1 span{display:block;margin-top:8px;font-size:.72em;color:#ffc46b}
.hero-sub{margin-top:16px;font-size:18px;color:#f3e6f0}
.hero-desc{margin-top:12px;max-width:720px;font-size:15px;color:#e4d5e2;line-height:1.85}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:38px;max-width:760px}
.hero-metrics li{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18)}
.hero-metrics strong{display:block;font-size:19px;color:#ffc46b}
.hero-metrics span{font-size:13px;color:#e6d8e4}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;transition:.2s;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,#ffab3d,var(--brand));color:#fff;box-shadow:0 10px 24px rgba(239,122,28,.34)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(239,122,28,.46)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.08)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}

/* section */
.sec{padding:64px 0}
.sec-alt{background:#fff}
.sec-head{max-width:700px;margin-bottom:34px}
.sec-head h2{font-size:clamp(21px,2.4vw,29px);line-height:1.35;letter-spacing:.5px}
.sec-head p{margin-top:12px;color:var(--ink2);font-size:15px}
.sec-dark{position:relative;color:#fff;background:url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;overflow:hidden}
.sec-dark::before{content:"";position:absolute;inset:0;background:linear-gradient(130deg,rgba(36,16,44,.95),rgba(58,26,58,.88))}
.sec-dark .container{position:relative;z-index:1}
.sec-dark .sec-head p{color:#d9c8dd}

/* kpi */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kpi{position:relative;overflow:hidden;padding:24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line)}
.kpi::after{content:"";position:absolute;right:-26px;top:-26px;width:80px;height:80px;border-radius:50%;background:var(--brand-soft)}
.kpi strong{position:relative;z-index:1;display:block;font-size:17px}
.kpi span{position:relative;z-index:1;display:block;margin-top:8px;font-size:14px;color:var(--ink2)}

/* matrix */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.matrix li{padding:24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);transition:.24s}
.matrix li:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:#f4cd9c}
.matrix h3{display:flex;align-items:center;gap:8px;font-size:16px}
.matrix h3::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--brand)}
.matrix p{margin-top:10px;font-size:14px;color:var(--ink2)}

/* hot cards */
.hot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.hot-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.24s}
.hot-card:hover{transform:translateY(-5px);box-shadow:var(--sh-h);border-color:#f4cd9c}
.cover{position:relative;aspect-ratio:3/4;display:grid;place-items:center;padding:14px;text-align:center;font-size:17px;font-weight:800;line-height:1.35;letter-spacing:1px;color:#fff;background:linear-gradient(155deg,var(--c1,#ef9a3f),var(--c2,#d1572f))}
.cover::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.3),transparent 62%)}
.cover span{position:relative;z-index:1}
.hot-info{padding:12px 14px 15px}
.hot-info h3{font-size:15px;font-weight:700;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hot-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:9px;font-size:12.5px;color:var(--ink2)}
.badge{display:inline-block;padding:2px 9px;border-radius:999px;background:var(--brand-soft);color:var(--brand-d);font-size:11.5px;font-weight:600}
.badge.alt{background:var(--plum-soft);color:var(--plum)}
.hot-grid>li:nth-child(1) .cover{--c1:#f7a44c;--c2:#d95f2c}
.hot-grid>li:nth-child(2) .cover{--c1:#7bb0e8;--c2:#3f5fa6}
.hot-grid>li:nth-child(3) .cover{--c1:#f06e6e;--c2:#9c2d3f}
.hot-grid>li:nth-child(4) .cover{--c1:#8c7ee0;--c2:#4a3291}
.hot-grid>li:nth-child(5) .cover{--c1:#5fbfa6;--c2:#23776b}
.hot-grid>li:nth-child(6) .cover{--c1:#e8b04b;--c2:#9a6a1b}
.hot-grid>li:nth-child(7) .cover{--c1:#ef86b0;--c2:#a5396a}
.hot-grid>li:nth-child(8) .cover{--c1:#f2a35e;--c2:#b5541c}
.hot-grid>li:nth-child(9) .cover{--c1:#6fb2d8;--c2:#2b6b91}
.hot-grid>li:nth-child(10) .cover{--c1:#c78be0;--c2:#6a2f92}
.hot-grid>li:nth-child(11) .cover{--c1:#89c47a;--c2:#3d7a3a}
.hot-grid>li:nth-child(12) .cover{--c1:#f0a96b;--c2:#9c4a2c}

/* channels */
.channels{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.channels a{display:block;height:100%;padding:24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);transition:.24s}
.channels a:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:#f4cd9c}
.channels h3{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:16.5px}
.channels h3::after{content:"›";color:var(--brand);font-size:20px;line-height:1}
.channels p{margin-top:10px;font-size:14px;color:var(--ink2)}

/* rank */
.rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 22px}
.rank-grid li{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:13px 16px;border-radius:14px;background:var(--card);border:1px solid var(--line);transition:.2s}
.rank-grid li:hover{border-color:#f4cd9c;box-shadow:var(--sh)}
.no{flex:0 0 auto;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:800;background:#f7ecdb;color:#a8781f}
.rank-grid li:nth-child(-n+3) .no{background:linear-gradient(135deg,#ffb01f,var(--brand));color:#fff}
.rank-name{font-size:15px;font-weight:600}
.rank-heat{margin-left:auto;font-size:12.5px;color:var(--ink2);white-space:nowrap}
.chip{font-size:11.5px;padding:2px 9px;border-radius:999px;background:var(--plum-soft);color:var(--plum);white-space:nowrap}

/* quotes */
.quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.quote{padding:22px 24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line)}
.quote p{font-size:15px}
.quote .who{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:13px;color:var(--ink2)}
.avatar{flex:0 0 auto;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:13px;background:linear-gradient(135deg,var(--c1,#f2a05a),var(--c2,#c85a2a))}

/* creators */
.creators{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.creator{display:flex;align-items:center;gap:14px;padding:18px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);transition:.24s}
.creator:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.creator .avatar{width:48px;height:48px;font-size:17px}
.creator h3{font-size:15.5px}
.creator p{margin-top:4px;font-size:13px;color:var(--ink2)}
.creators li:nth-child(1) .avatar{--c1:#8c7ee0;--c2:#4a3291}
.creators li:nth-child(2) .avatar{--c1:#5fbfa6;--c2:#23776b}
.creators li:nth-child(3) .avatar{--c1:#ef86b0;--c2:#a5396a}
.creators li:nth-child(4) .avatar{--c1:#6fb2d8;--c2:#2b6b91}
.creators li:nth-child(5) .avatar{--c1:#e8b04b;--c2:#9a6a1b}
.creators li:nth-child(6) .avatar{--c1:#f06e6e;--c2:#9c2d3f}

/* timeline */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tl{padding:22px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);border-top:3px solid var(--brand)}
.tl h3{font-size:15px;color:var(--brand-d)}
.tl p{margin-top:9px;font-size:14px;color:var(--ink2)}

/* news */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.24s}
.news li:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.news img{width:100%;height:172px;object-fit:cover}
.news h3{padding:14px 16px 18px;font-size:15px;line-height:1.55}

/* guard */
.guard{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.guard li{padding:24px;border-radius:var(--r);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16)}
.guard h3{display:flex;align-items:center;gap:9px;font-size:16px}
.guard h3::before{content:"✓";flex:0 0 auto;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:12px;color:#fff;background:linear-gradient(135deg,#ffb01f,var(--brand))}
.guard p{margin-top:10px;font-size:14px;color:#ddcddf}

/* faq */
.faq{display:grid;gap:12px;max-width:900px}
.faq details{padding:16px 20px;border-radius:14px;background:var(--card);border:1px solid var(--line);transition:.2s}
.faq details[open]{border-color:#f4cd9c;box-shadow:var(--sh)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:26px;font-size:15.5px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;font-weight:700;line-height:1;color:var(--brand)}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:12px;font-size:14.5px;color:var(--ink2);line-height:1.85}

/* footer */
.footer{background:#241428;color:#c9b9d0;padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:34px}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff}
.foot-desc{margin-top:14px;max-width:320px;font-size:14px;color:#b7a6be}
.footer h4{margin-bottom:14px;font-size:15px;color:#fff}
.footer li a{display:block;padding:6px 0;font-size:14px;color:#c9b9d0;transition:.18s}
.footer li a:hover{color:#ffb01f}
.copy{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:44px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#a897af}

@media(max-width:1024px){
  .nav{height:auto;flex-wrap:wrap;padding:10px 0;row-gap:8px}
  .nav-links{width:100%;margin-left:0;gap:2px;overflow-x:auto;padding-bottom:2px}
  .nav-links a{font-size:14px;padding:8px 11px}
  .hero{padding:56px 0 52px}
  .hot-grid{grid-template-columns:repeat(3,1fr)}
  .matrix,.channels,.creators,.news{grid-template-columns:repeat(2,1fr)}
  .kpi-grid,.guard,.timeline{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media(max-width:768px){
  .sec{padding:48px 0}
  .hero-metrics{grid-template-columns:repeat(2,1fr);max-width:none}
  .hot-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .rank-grid{grid-template-columns:1fr}
  .quotes{grid-template-columns:1fr}
  .hero-sub{font-size:16px}
  .news img{height:190px}
}
@media(max-width:520px){
  .container{width:94%}
  .sec{padding:40px 0}
  .hot-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .cover{font-size:15px;padding:10px}
  .hot-info{padding:10px 11px 13px}
  .matrix,.channels,.kpi-grid,.guard,.timeline,.news,.creators,.foot-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .hero h1{font-size:30px}
  .rank-heat{margin-left:0;width:100%}
  .news img{height:180px}
}