/* roulang page: index */
:root{
  --primary:#D8506E;
  --primary-d:#c2455f;
  --ink:#17120F;
  --bg:#FBF7F4;
  --sand:#F4E3DD;
  --apricot:#F0A67C;
  --muted:#6B5F5A;
  --line:rgba(23,18,15,.10);
  --dark:#14100E;
  --r:4px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding:0 48px}
.hl{color:var(--primary)}
.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--primary);font-weight:700;margin-bottom:10px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r);font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out}
.btn-main{background:var(--primary);color:#FBF7F4}
.btn-main:hover{background:var(--primary-d);transform:translateX(1px)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}

/* header */
.hdr{position:sticky;top:0;z-index:60;background:transparent;border-bottom:1px solid transparent;transition:background .2s ease-out,border-color .2s ease-out}
.hdr.on{background:var(--bg);border-bottom-color:var(--line)}
.hdr-in{max-width:1200px;margin:0 auto;padding:0 48px;height:72px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:30px;height:30px;border-radius:var(--r);background:var(--primary);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700}
.logo-txt{font-size:15px;font-weight:800;letter-spacing:-.01em}
.nav{margin-left:auto;display:flex;align-items:center;gap:26px;font-size:14px;color:var(--muted)}
.nav a{transition:color .16s ease-out}
.nav a:hover{color:var(--primary)}
.nav a.active{color:var(--ink);font-weight:700}
.btn-min{height:36px;padding:0 16px;font-size:13.5px;border-radius:var(--r);border:1px solid var(--ink);display:inline-flex;align-items:center;transition:border-color .18s ease-out,color .18s ease-out}
.btn-min:hover{border-color:var(--primary);color:var(--primary)}
.nav-cta{display:none}
.burger{display:none;width:44px;height:44px;margin-left:auto;background:none;border:0;padding:0;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4px auto;transition:transform .2s ease-out,opacity .2s ease-out}
.burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* hero */
.hero{padding:56px 0 72px}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:start}
.hero h1{font-size:clamp(28px,4.2vw,50px);line-height:1.2;margin-bottom:18px}
.hero-sub{font-size:16.5px;font-weight:600;color:var(--ink);margin-bottom:14px}
.hero-desc{font-size:15px;color:var(--muted);max-width:560px}
.hero-btns{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-art{position:relative;border-radius:6px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/5}
.hero-art img{width:100%;height:100%;object-fit:cover}
.hero-art::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(20,16,14,.42),rgba(20,16,14,0) 45%)}
.hero-tag{position:absolute;left:14px;top:14px;z-index:2;background:var(--primary);color:#FBF7F4;font-size:12px;padding:3px 11px;border-radius:999px}
.hero-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:64px;height:64px;border-radius:50%;background:rgba(251,247,244,.92);color:var(--primary);display:grid;place-items:center;font-size:18px;padding-left:4px}
.hero-foot{border-top:1px solid var(--line);margin-top:16px;padding-top:10px}
.hero-note{font-size:12px;color:var(--muted);letter-spacing:.02em;font-variant-numeric:tabular-nums}

/* section common */
.sec{padding:96px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px}
.sec-head h2{font-size:clamp(23px,2.6vw,32px)}
.sec-sub{margin-top:12px;font-size:14.5px;color:var(--muted);max-width:680px}
.more{font-size:13.5px;color:var(--muted);white-space:nowrap;border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .16s ease-out,border-color .16s ease-out}
.more:hover{color:var(--primary);border-color:var(--primary)}

/* 12 cards */
.grid-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:30px 24px}
.card .poster{position:relative;display:block;aspect-ratio:3/4;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);transition:transform .18s ease-out,border-color .18s ease-out}
.card .poster img{width:100%;height:100%;object-fit:cover}
.card:hover .poster{transform:translateY(-2px);border-color:var(--primary)}
.badge{position:absolute;left:8px;top:8px;font-size:11px;line-height:1.7;padding:1px 8px;border-radius:999px;font-variant-numeric:tabular-nums}
.b-hd{background:rgba(251,247,244,.92);border:1px solid var(--ink);color:var(--ink)}
.b-bd{background:var(--sand);color:var(--ink)}
.b-up{background:none;color:#fff;padding:0 0 0 12px;text-shadow:0 1px 6px rgba(0,0,0,.6)}
.b-up::before{content:"";position:absolute;left:0;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--primary)}
.corner{position:absolute;right:8px;bottom:8px;width:30px;height:30px;border-radius:50%;background:rgba(251,247,244,.92);color:var(--primary);display:grid;place-items:center;font-size:11px;opacity:0;transition:opacity .18s ease-out}
.card:hover .corner{opacity:1}
.cap{display:flex;align-items:center;gap:8px;margin-top:10px}
.name{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.score{margin-left:auto;font-size:14px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;white-space:nowrap}
.score em{font-style:normal;font-size:11px;font-weight:400;color:var(--muted);opacity:.6;margin-left:1px}

/* hot cards */
.hot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.hot{border:1px solid var(--line);border-radius:var(--r);background:transparent;transition:background .18s ease-out,border-color .18s ease-out;overflow:hidden}
.hot:hover{background:var(--sand);border-color:rgba(23,18,15,.16)}
.hot-thumb{aspect-ratio:16/10;overflow:hidden}
.hot-thumb img{width:100%;height:100%;object-fit:cover}
.hot-body{padding:18px 20px 24px}
.hot-kicker{font-size:12px;color:var(--muted);letter-spacing:.02em}
.hot-title{font-size:17px;margin:6px 0 8px}
.hot-desc{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* channels */
.ch-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;border-left:1px solid var(--line);padding-left:36px}
.ch{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;padding:26px 0;border-bottom:1px solid var(--line)}
.ch-num{font-size:44px;line-height:1;color:#E0C6BE;font-weight:700;font-variant-numeric:tabular-nums}
.ch-name{font-size:17px;font-weight:700;transition:color .16s ease-out}
.ch:hover .ch-name{color:var(--primary)}
.ch-desc{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.7}
.ch-arrow{color:var(--muted);font-size:15px;transition:transform .18s ease-out,color .18s ease-out}
.ch:hover .ch-arrow{transform:translateX(4px);color:var(--primary)}

/* stats */
.stats{background:var(--dark);color:#FBF7F4;padding:72px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.num{font-size:38px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:#FBF7F4}
.num span{font-size:12.5px;font-weight:400;color:rgba(251,247,244,.55);margin-left:6px;letter-spacing:0}
.stat-l{font-size:13px;color:rgba(251,247,244,.6);margin-top:4px}

/* flow */
.flow{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.flow::before{content:"";position:absolute;left:22px;right:22px;top:22px;border-top:1px dashed rgba(23,18,15,.22)}
.step{position:relative}
.step-n{width:44px;height:44px;border-radius:50%;border:1px solid var(--ink);display:grid;place-items:center;font-size:14px;font-weight:700;background:var(--bg);position:relative;z-index:1;font-variant-numeric:tabular-nums}
.step h3{font-size:16px;margin:16px 0 8px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.7;max-width:290px}

/* rank */
.rank{background:var(--sand);padding:96px 0}
.rank-cols{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.rank-head{display:grid;grid-template-columns:52px 1fr auto auto auto;gap:14px;font-size:11px;letter-spacing:.1em;color:var(--muted);padding-bottom:10px;border-bottom:1px solid rgba(23,18,15,.18)}
.rank-row{display:grid;grid-template-columns:52px 1fr auto auto auto;gap:14px;align-items:center;padding:13px 0;border-bottom:1px solid rgba(23,18,15,.1);transition:background .16s ease-out}
.rank-row:hover{background:rgba(23,18,15,.05)}
.r-num{font-size:28px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(23,18,15,.32);font-variant-numeric:tabular-nums}
.rank-row:hover .r-num{color:var(--primary);-webkit-text-stroke:0}
.r-name{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.r-heat{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.r-score{font-size:14px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums}
.r-tag{font-size:11px;border:1px solid rgba(23,18,15,.22);border-radius:999px;padding:1px 8px;color:var(--muted);white-space:nowrap}

/* topics */
.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.topic{position:relative;display:block;aspect-ratio:16/7;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.topic img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.topic:hover img{transform:scale(1.03)}
.topic-mask{position:absolute;inset:0;background:linear-gradient(to top,rgba(20,16,14,.82),rgba(20,16,14,.18) 55%,rgba(20,16,14,0));display:flex;flex-direction:column;justify-content:flex-end;padding:22px;color:#FBF7F4}
.topic-mask h3{font-size:18px}
.topic-mask p{font-size:12.5px;color:rgba(251,247,244,.8);margin-top:4px}

/* news */
.news-list{max-width:860px}
.news{display:grid;grid-template-columns:180px 1fr;gap:20px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}
.news-thumb{aspect-ratio:16/10;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news h3{font-size:15.5px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news time{display:block;font-size:12px;color:var(--muted);margin-top:6px;font-variant-numeric:tabular-nums}
.news a:hover h3{color:var(--primary)}

/* faq */
.faq-list{max-width:900px}
details.faq{border-top:1px solid var(--line);transition:border-color .18s ease-out}
details.faq[open]{border-top-color:var(--primary)}
summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;font-size:16px;font-weight:700}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--primary);font-size:20px;font-weight:400;line-height:1}
details[open] summary::after{content:"−"}
details.faq p{padding-bottom:22px;font-size:14px;color:var(--muted);max-width:720px;line-height:1.8}

/* partners */
.pt-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pt-grid span{font-size:12.5px;color:rgba(23,18,15,.36);text-align:center;letter-spacing:.04em}

/* guard */
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.guard-ico{width:26px;height:26px;border:1px solid var(--ink);border-radius:3px;display:grid;place-items:center;font-size:12px;color:var(--primary)}
.guard h3{font-size:14.5px;margin:12px 0 4px}
.guard p{font-size:13px;color:var(--muted);line-height:1.7}

/* cta */
.cta{position:relative;overflow:hidden;background:var(--dark);color:#FBF7F4;padding:88px 0 64px}
.cta-bg{position:absolute;inset:0;opacity:.26}
.cta-bg img{width:100%;height:100%;object-fit:cover}
.cta-inner{position:relative;z-index:1;max-width:720px}
.cta h2{font-size:clamp(23px,3vw,34px);color:#FBF7F4}
.cta p{margin-top:14px;font-size:15px;color:rgba(251,247,244,.74)}
.cta-btns{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.cta .btn-ghost{border-color:rgba(251,247,244,.55);color:#FBF7F4}
.cta .btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.cta-note{position:relative;z-index:1;margin-top:36px;text-align:right;font-size:11.5px;color:rgba(251,247,244,.44);font-variant-numeric:tabular-nums}

/* footer */
.ftr{border-top:1px solid var(--line);padding:64px 0 28px}
.ftr-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
.ftr h4{font-size:13px;letter-spacing:.08em;margin-bottom:14px}
.ftr li{margin-bottom:8px;font-size:13.5px;color:var(--muted)}
.ftr li a:hover{color:var(--primary)}
.ftr-intro{font-size:13.5px;color:var(--muted);margin-top:14px;line-height:1.75;max-width:300px}
.ftr-decl{font-size:13px;color:var(--muted);line-height:1.75;max-width:340px}
.copy{margin-top:44px;padding-top:18px;border-top:1px solid var(--line);text-align:center;font-size:12px;color:var(--muted)}

/* motion */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition-duration:.01ms!important}
  .card:hover .poster,.topic:hover img,.btn-main:hover{transform:none}
}

/* 1024 */
@media (max-width:1024px){
  .wrap{padding:0 32px}
  .hdr-in{padding:0 32px;gap:18px}
  .nav{gap:18px;font-size:13.5px}
  .hero-grid{gap:36px}
  .sec{padding:80px 0}
  .rank{padding:80px 0}
  .grid-cards{grid-template-columns:repeat(3,1fr)}
  .hot-grid{grid-template-columns:repeat(2,1fr)}
  .ch-grid{grid-template-columns:1fr;padding-left:28px}
  .ftr-grid{grid-template-columns:1fr 1fr;gap:32px}
  .topic-grid{grid-template-columns:1fr 1fr}
}
/* 768 */
@media (max-width:768px){
  .wrap{padding:0 20px}
  .hdr-in{height:56px;padding:0 20px}
  .burger{display:block}
  .nav{position:absolute;left:0;right:0;top:56px;display:none;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 20px 20px}
  .nav.open{display:flex}
  .nav a{padding:13px 0;font-size:17px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}
  .nav a.active{color:var(--primary)}
  .nav-cta{display:flex;margin-top:16px;justify-content:center}
  .btn-min{display:none}
  .hero{padding:28px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-art{aspect-ratio:4/3}
  .hero-btns .btn{flex:1 1 46%}
  .sec{padding:64px 0}
  .rank{padding:64px 0}
  .stats{padding:56px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .grid-cards{grid-template-columns:repeat(2,1fr);gap:24px 16px}
  .hot-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr;gap:24px}
  .flow{grid-template-columns:1fr;gap:26px}
  .flow::before{left:22px;right:auto;top:0;bottom:0;border-top:0;border-left:1px dashed rgba(23,18,15,.22)}
  .step p{max-width:none}
  .rank-cols{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .news{grid-template-columns:118px 1fr;gap:16px}
  .guard-grid{grid-template-columns:1fr 1fr}
  .pt-grid{grid-template-columns:repeat(3,1fr);gap:12px}
  .cta{padding:64px 0 48px}
  .cta-note{text-align:left;margin-top:28px}
  .ftr{padding:48px 0 24px}
}
/* 520 */
@media (max-width:520px){
  .grid-cards{grid-template-columns:1fr}
  .hero-btns .btn{flex:1 1 100%}
  .guard-grid{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr}
  .ch-num{font-size:34px}
  .ch{padding:20px 0;gap:14px}
  .num{font-size:30px}
  .r-num{font-size:22px}
  .rank-head,.rank-row{grid-template-columns:38px 1fr auto auto;gap:10px}
  .rank-head span:last-child,.rank-row .r-tag{display:none}
  .news{grid-template-columns:96px 1fr;gap:14px}
  .sec{padding:56px 0}
  .rank{padding:56px 0}
  .hero-sub{font-size:15.5px}
}