/* roulang page: index */
:root{
  --paper:#FAF6EF;
  --card:#FFFFFF;
  --ink:#17181C;
  --dark:#15171B;
  --primary:#C9451F;
  --orange:#E4572E;
  --bamboo:#1F8A70;
  --line:#E6DED2;
  --muted:#66645F;
  --soft:#F3EDE3;
  --r:10px;
  --sh:0 6px 18px rgba(23,24,28,.06);
  --sh-h:0 12px 28px rgba(23,24,28,.10);
  --num:"Barlow Condensed","DIN Alternate",ui-monospace,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,figure,ol,ul{margin:0;padding:0}
ul,ol{list-style:none}
button{font:inherit}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section[id]{scroll-margin-top:96px}
a:focus-visible,summary:focus-visible,button:focus-visible{outline:2px solid var(--bamboo);outline-offset:2px;border-radius:4px}

/* header */
.site-head{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;flex:0 0 auto}
.logo{width:38px;height:38px;border-radius:10px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:15px;letter-spacing:1px}
.wordmark{font-size:19px;letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:24px;overflow-x:auto;scrollbar-width:none;min-width:0}
.nav::-webkit-scrollbar{display:none}
.nav a{position:relative;padding:8px 0;color:var(--muted);white-space:nowrap;font-size:15px;transition:color .2s}
.nav a:hover{color:var(--ink)}
.nav a.active{color:var(--ink);font-weight:700}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary)}

/* breadcrumb */
.crumb-bar{background:var(--soft);border-bottom:1px solid var(--line);font-size:13px}
.crumb-inner{display:flex;align-items:center;height:44px;gap:8px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
.crumb-inner::-webkit-scrollbar{display:none}
.crumbs{display:flex;align-items:center;gap:8px;color:var(--muted)}
.crumbs .sep{color:#BDB6AA}
.crumbs a:hover{color:var(--primary)}
.crumbs .cur{color:var(--ink);font-weight:600}

/* generic section */
.sec{padding:76px 0}
.sec.alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:30px}
.eyebrow{font-size:12px;letter-spacing:2px;color:var(--primary);font-weight:700;text-transform:uppercase}
.sec-head h2{font-size:32px;font-weight:800;line-height:1.25;margin-top:6px}
.sec-head p{margin-top:10px;color:var(--muted);font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:8px;font-size:15px;font-weight:600;border:1.5px solid transparent;transition:background .2s,color .2s,border-color .2s,transform .2s;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--orange);transform:translateY(-1px)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}

/* hero */
.hero{padding:64px 0 72px}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(32px,4.6vw,54px);line-height:1.15;font-weight:800;letter-spacing:-.5px}
.hero h1 .hl{color:var(--primary)}
.hero-sub{font-size:17px;font-weight:600;margin-top:16px;color:var(--ink)}
.hero-desc{margin-top:14px;max-width:38em;color:var(--muted)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.live{display:inline-flex;align-items:center;gap:10px;margin-top:24px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--card);font-size:13px;color:var(--muted)}
.live b{font-family:var(--num);font-size:16px;color:var(--primary);letter-spacing:1px;font-variant-numeric:tabular-nums}
.live .dot{width:7px;height:7px;border-radius:50%;background:var(--bamboo)}
.stage{position:relative;min-height:340px}
.stage figure{position:absolute;width:78%;border-radius:10px;overflow:hidden;box-shadow:0 12px 28px rgba(23,24,28,.14);background:#E8E0D4}
.stage figure img{width:100%;height:100%;object-fit:cover}
.stage figure:nth-child(1){top:0;left:0;z-index:3}
.stage figure:nth-child(2){top:22px;right:0;z-index:2}
.stage figure:nth-child(3){bottom:0;left:11%;z-index:1}

/* pain */
.pain-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px}
.pain-head h2{font-size:30px;font-weight:800;line-height:1.3;margin-top:6px}
.pain-head p{margin-top:12px;color:var(--muted)}
.pain-list li{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.pain-list li:first-child{padding-top:0}
.pain-list .num{font-family:var(--num);font-size:26px;color:var(--primary);line-height:1.2;flex:0 0 auto}
.pain-list h3{font-size:17px;font-weight:700;margin-bottom:6px}
.pain-list p{color:var(--muted);font-size:14px}

/* video cards */
.hot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-h)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E8E0D4}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card:hover .thumb img{transform:scale(1.03)}
.dur{position:absolute;right:8px;bottom:8px;background:rgba(21,23,27,.78);color:#fff;font-size:12px;padding:1px 7px;border-radius:4px;font-family:var(--num);letter-spacing:.5px}
.card-body{padding:14px 16px 16px}
.card-title{font-size:16px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.card:hover .card-title{color:var(--primary)}
.meta{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:12px;color:var(--muted)}
.pill{background:rgba(31,138,112,.1);color:var(--bamboo);border-radius:999px;padding:1px 9px;font-size:12px;white-space:nowrap}
.plays{display:inline-flex;align-items:center;gap:5px;font-family:var(--num);font-size:13px;letter-spacing:.3px}
.plays::before{content:"";width:0;height:0;border-left:6px solid var(--primary);border-top:4px solid transparent;border-bottom:4px solid transparent}

/* latest */
.latest-grid{display:grid;grid-template-columns:repeat(2,1fr);column-gap:36px}
.rowcard{display:flex;gap:14px;padding:16px 8px;border-bottom:1px solid var(--line);transition:background .2s}
.rowcard:hover{background:var(--paper)}
.rowthumb{flex:0 0 160px;width:160px;height:90px;border-radius:8px;overflow:hidden;background:#E8E0D4}
.rowthumb img{width:100%;height:100%;object-fit:cover}
.rowmain{min-width:0}
.rowmain h3{font-size:16px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.rowcard:hover h3{color:var(--primary)}
.rowmeta{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;font-size:12px;color:var(--muted)}
.rowmeta .t{font-family:var(--num);letter-spacing:.4px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
.steps li{position:relative;padding:24px 22px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.steps li::after{content:"";position:absolute;top:50%;right:-24px;width:24px;height:1px;background:var(--line)}
.steps li:last-child::after{display:none}
.step-num{font-family:var(--num);font-size:30px;color:var(--primary);line-height:1}
.steps h3{font-size:17px;font-weight:700;margin:10px 0 8px}
.steps p{font-size:14px;color:var(--muted)}
.steps a{display:inline-block;margin-top:12px;font-size:13px;font-weight:600;color:var(--bamboo);border-bottom:1px solid rgba(31,138,112,.4)}
.steps a:hover{color:var(--primary);border-bottom-color:var(--primary)}

/* channels */
.chan{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.chan li{border-radius:var(--r);padding:24px;display:flex;flex-direction:column;gap:8px;transition:transform .2s,box-shadow .2s;grid-column:span 3;background:var(--card);border:1px solid var(--line)}
.chan li:hover{transform:translateY(-2px);box-shadow:var(--sh-h)}
.chan li.big{grid-column:span 6;background:rgba(201,69,31,.06);border-color:rgba(201,69,31,.18)}
.chan h3{font-size:19px;font-weight:800}
.chan li.big h3{font-size:26px}
.chan p{font-size:14px;color:var(--muted);line-height:1.7}
.chan .cnt{font-family:var(--num);font-size:13px;color:var(--bamboo);letter-spacing:.4px;margin-top:auto}
.chan .arrow{font-size:14px;color:var(--primary);font-weight:700}
.chan-more{margin-top:26px}

/* rank */
.rank{background:var(--dark);color:#fff;padding:76px 0}
.rank-grid{display:grid;grid-template-columns:4fr 8fr;gap:44px}
.rank-grid h2{font-size:30px;font-weight:800;line-height:1.3;color:#fff;margin-top:6px}
.rank-grid .rsub{margin-top:12px;color:rgba(255,255,255,.62);font-size:14px}
.rank-grid .eyebrow{color:var(--orange)}
.rank-item{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.rank-item:first-child{border-top:1px solid rgba(255,255,255,.1)}
.rank-no{font-family:var(--num);font-size:22px;width:44px;flex:0 0 44px;color:rgba(255,255,255,.42);letter-spacing:.5px}
.rank-item:nth-child(-n+3) .rank-no{color:var(--orange)}
.rank-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}
.heat{width:88px;height:4px;border-radius:2px;background:rgba(255,255,255,.14);overflow:hidden;flex:0 0 88px}
.heat i{display:block;height:100%;background:var(--bamboo)}
.rank-plays{font-family:var(--num);font-size:14px;color:rgba(255,255,255,.72);flex:0 0 auto}
.rank-tag{font-size:12px;border:1px solid rgba(255,255,255,.24);border-radius:999px;padding:1px 9px;color:rgba(255,255,255,.8);flex:0 0 auto}

/* results */
.results{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.results li{padding:28px 22px;border-left:1px solid var(--line)}
.results li:first-child{border-left:0}
.results b{display:block;font-family:var(--num);font-size:42px;line-height:1.05;color:var(--primary);letter-spacing:-.5px}
.results span{display:block;margin-top:6px;font-size:14px;font-weight:700}
.results p{margin-top:4px;font-size:13px;color:var(--muted);line-height:1.6}
.note{margin-top:16px;font-size:12px;color:var(--muted)}

/* voices */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.vcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:22px}
.vcard:nth-child(2){margin-top:24px}
.vcard:nth-child(3){margin-top:12px}
.vtop{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:42px;height:42px;border-radius:50%;background:rgba(201,69,31,.12);color:var(--primary);display:grid;place-items:center;font-weight:800;font-size:16px}
.vtop strong{display:block;font-size:14px}
.vtop em{font-style:normal;font-size:12px;color:var(--muted)}
.vcard blockquote{margin:0;font-size:14px;color:#3C3B38;line-height:1.75}
.vtag{display:inline-block;margin-top:14px;font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 9px}

/* audience */
.aud{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.aud>li{grid-column:span 2;background:var(--card);border-left:3px solid var(--primary);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.aud>li:nth-child(4){grid-column:2/span 2}
.aud h3{font-size:16px;font-weight:700}
.aud p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.7}
.aud .idx{font-family:var(--num);font-size:13px;color:var(--bamboo);letter-spacing:1px}

/* topics */
.topics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.topic{position:relative;background:var(--card);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s}
.topic:hover{transform:translateY(-2px);box-shadow:var(--sh-h)}
.topic .tt{aspect-ratio:4/3;overflow:hidden;background:#E8E0D4}
.topic .tt img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.topic:hover .tt img{transform:scale(1.03)}
.topic .badge{position:absolute;top:10px;left:10px;background:rgba(201,69,31,.92);color:#fff;font-size:11px;padding:2px 9px;border-radius:999px}
.topic .tbody{padding:14px 16px 18px}
.topic h3{font-size:16px;font-weight:700}
.topic p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.7}

/* news */
.news{display:grid;grid-template-columns:repeat(2,1fr);gap:6px 36px}
.nitem{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);transition:background .2s}
.nitem:hover{background:var(--paper)}
.nthumb{flex:0 0 132px;width:132px;aspect-ratio:3/2;border-radius:8px;overflow:hidden;background:#E8E0D4}
.nthumb img{width:100%;height:100%;object-fit:cover}
.nitem h3{font-size:15px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nitem:hover h3{color:var(--primary)}
.nmeta{display:flex;gap:10px;margin-top:8px;font-size:12px;color:var(--muted)}
.nmeta .d{font-family:var(--num);letter-spacing:.4px}
.nmeta .k{color:var(--bamboo)}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:26px 44px}
.metrics .mlabel{display:flex;justify-content:space-between;align-items:baseline;font-size:14px;font-weight:600}
.metrics .mlabel b{font-family:var(--num);font-size:16px;color:var(--bamboo);letter-spacing:.5px}
.bar{height:6px;background:var(--line);border-radius:3px;overflow:hidden;margin:8px 0 6px}
.bar i{display:block;height:100%;background:var(--bamboo);border-radius:3px}
.metrics p{font-size:13px;color:var(--muted)}

/* faq */
.faq{max-width:860px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin-bottom:14px;transition:background .2s,border-color .2s}
.faq details[open]{background:rgba(201,69,31,.05);border-color:rgba(201,69,31,.24)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;min-height:44px;cursor:pointer;font-weight:700;font-size:15px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;line-height:1;color:var(--primary);flex:0 0 auto}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 18px 18px;color:var(--muted);font-size:15px}

/* cta */
.cta{position:relative;background:var(--dark);color:#fff;padding:66px 0;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:url('/assets/images/ca7c9a925cd2612c.jpg') center/cover no-repeat;opacity:.2}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta h2{font-size:24px;font-weight:800;line-height:1.4;max-width:16em}
.cta p{margin-top:10px;color:rgba(255,255,255,.72);font-size:14px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta .btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.cta .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.1)}

/* footer */
.foot{background:var(--dark);color:#C9C6C0;padding:56px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:4fr 2fr 2fr;gap:36px}
.foot .brand{color:#fff;margin-bottom:14px}
.foot .fdesc{font-size:13px;line-height:1.8;color:rgba(255,255,255,.6);max-width:32em}
.foot h3{font-size:14px;color:#fff;font-weight:700;margin-bottom:12px}
.foot ul li{margin-bottom:8px}
.foot ul a{font-size:13px;color:rgba(255,255,255,.66);transition:color .2s,border-color .2s;border-bottom:1px solid transparent}
.foot ul a:hover{color:var(--orange);border-bottom-color:var(--orange)}
.copyright{margin-top:40px;border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:12px;color:rgba(255,255,255,.5);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .stage{min-height:300px}
  .pain-grid{grid-template-columns:1fr;gap:28px}
  .hot-grid{grid-template-columns:repeat(3,1fr)}
  .chan li{grid-column:span 6}
  .rank-grid{grid-template-columns:1fr;gap:28px}
  .results{grid-template-columns:repeat(2,1fr)}
  .results li:nth-child(3){border-left:0}
  .results li:nth-child(3),.results li:nth-child(4){border-top:1px solid var(--line)}
  .aud{grid-template-columns:repeat(2,1fr)}
  .aud>li,.aud>li:nth-child(4){grid-column:auto}
  .topics{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:2fr 1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .head-inner{height:64px;gap:14px}
  .brand{gap:8px}
  .logo{width:34px;height:34px;font-size:13px}
  .wordmark{font-size:17px}
  .nav{gap:16px;font-size:14px}
  .nav a{font-size:14px;padding:10px 0}
  .sec{padding:48px 0}
  .hero{padding:40px 0 48px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .sec-head h2,.pain-head h2,.rank-grid h2{font-size:24px}
  .stage{min-height:0;display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .stage figure{position:static;width:100%;box-shadow:var(--sh)}
  .stage figure:nth-child(3){display:none}
  .hot-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .latest-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:16px}
  .steps li::after{display:none}
  .chan li,.chan li.big{grid-column:span 12}
  .chan li.big h3{font-size:22px}
  .voices{grid-template-columns:1fr}
  .vcard:nth-child(2),.vcard:nth-child(3){margin-top:0}
  .aud{grid-template-columns:1fr}
  .topics{grid-template-columns:repeat(2,1fr)}
  .news{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr;gap:20px}
  .cta{padding:48px 0}
  .cta h2{font-size:20px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:24px}
  .foot .fbrand{grid-column:span 2}
  .rank-item{flex-wrap:wrap}
  .heat{display:none}
  .rank-title{white-space:normal;line-height:1.45}
}
@media (max-width:520px){
  .stage{grid-template-columns:1fr}
  .stage figure:nth-child(2){display:none}
  .hot-grid{grid-template-columns:1fr}
  .results{grid-template-columns:1fr}
  .results li{border-left:0;border-top:1px solid var(--line);padding:22px 4px}
  .results li:first-child{border-top:0}
  .topics{grid-template-columns:1fr}
  .rowthumb{flex:0 0 116px;width:116px;height:66px}
  .nthumb{flex:0 0 104px;width:104px}
  .foot-grid{grid-template-columns:1fr}
  .foot .fbrand{grid-column:span 1}
  .hero-actions .btn{width:100%}
  .copyright{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  .card:hover,.topic:hover,.chan li:hover{transform:none}
}