/* roulang page: index */
:root{
  --bg:#0d0f14;
  --surface:#161922;
  --surface-2:#1d222d;
  --text:#eef1f7;
  --muted:#98a1b3;
  --line:#272d3a;
  --accent:#ff6b3d;
  --accent-soft:rgba(255,107,61,.14);
  --gold:#ffc85c;
  --radius:16px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25}
p{margin:0}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* 顶栏 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(13,15,20,.9);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.02em;flex:none}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),#ffa270);
  display:grid;place-items:center;color:#14161c;font-weight:800;font-size:17px;
}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:9px 14px;border-radius:999px;font-size:14.5px;color:var(--muted);transition:background .2s,color .2s;min-height:44px;display:inline-flex;align-items:center}
.nav a:hover,.nav a:focus-visible{color:var(--text);background:var(--surface-2);outline:none}
.nav a.active{color:#14161c;background:var(--accent);font-weight:600}

/* 首屏 */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(9,11,15,.95) 0%,rgba(9,11,15,.84) 46%,rgba(9,11,15,.42) 100%);
}
.hero-inner{position:relative;padding:92px 0 80px;max-width:680px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:600;
  border:1px solid rgba(255,107,61,.32);
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block}
.hero h1{font-size:clamp(30px,4.2vw,50px);margin:22px 0 14px;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-sub{font-size:17.5px;color:#d3dae7;font-weight:500;margin:0 0 16px}
.hero-desc{color:var(--muted);font-size:15.5px;max-width:580px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:999px;font-size:15.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s,box-shadow .18s,background .18s,border-color .18s;
}
.btn-primary{background:var(--accent);color:#14161c;box-shadow:0 12px 28px rgba(255,107,61,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,107,61,.42)}
.btn-ghost{background:rgba(255,255,255,.07);color:var(--text);border-color:rgba(255,255,255,.2)}
.btn-ghost:hover{background:rgba(255,255,255,.13);transform:translateY(-2px)}
.btn:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* 通用板块 */
.section{padding:72px 0;border-bottom:1px solid var(--line)}
.section--alt{background:#11141b}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.sec-title{font-size:clamp(22px,2.5vw,30px);letter-spacing:-.01em}
.sec-title span{color:var(--accent)}
.sec-desc{margin-top:10px;color:var(--muted);font-size:14.5px;max-width:640px}
.sec-more{
  font-size:14px;color:var(--muted);border:1px solid var(--line);
  padding:10px 20px;border-radius:999px;transition:.2s;flex:none;
}
.sec-more:hover{color:var(--accent);border-color:var(--accent)}

/* 卡片网格 */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}

.card{
  background:var(--surface-2);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(255,107,61,.42)}
.poster{position:relative;display:block;aspect-ratio:2/3;overflow:hidden;background:#20242e}
.poster img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.card:hover .poster img{transform:scale(1.06)}
.badge{
  position:absolute;top:10px;left:10px;padding:3px 9px;border-radius:6px;
  font-size:11.5px;font-weight:700;letter-spacing:.02em;
  background:rgba(9,11,15,.8);color:#fff;backdrop-filter:blur(4px);
}
.badge--hd{color:var(--gold)}
.rate{
  position:absolute;right:10px;bottom:10px;padding:3px 9px;border-radius:6px;
  background:rgba(9,11,15,.82);color:var(--gold);font-size:12.5px;font-weight:700;
}
.card-body{padding:14px 15px 16px}
.card-title{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:8px;font-size:13px;color:var(--muted)}

/* 分类频道 */
.channels{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.channel{
  display:block;padding:26px 24px;border-radius:var(--radius);
  background:var(--surface-2);border:1px solid var(--line);
  transition:transform .22s,border-color .22s,background .22s;
}
.channel:hover{transform:translateY(-3px);border-color:var(--accent);background:#242b39}
.channel h3{font-size:17px;display:flex;align-items:center;gap:10px;margin-bottom:9px}
.channel h3 i{width:6px;height:18px;border-radius:3px;background:var(--accent);display:block;flex:none}
.channel p{font-size:14px;color:var(--muted);line-height:1.72}

/* 排行榜 */
.rank-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 26px}
.rank-item{
  display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:12px;
  background:var(--surface-2);border:1px solid var(--line);
  transition:transform .2s,border-color .2s;
}
.rank-item:hover{transform:translateX(3px);border-color:rgba(255,107,61,.45)}
.rank-no{width:28px;flex:none;font-size:16px;font-weight:800;color:var(--muted);font-variant-numeric:tabular-nums}
.rank-item:nth-child(-n+3) .rank-no{color:var(--accent)}
.rank-name{flex:1;min-width:0;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-bar{width:86px;height:6px;border-radius:3px;background:#2b3242;overflow:hidden;flex:none}
.rank-bar i{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,var(--accent),var(--gold))}
.rank-score{width:34px;text-align:right;font-size:13.5px;font-weight:700;color:var(--gold);flex:none}
.tag{font-size:11.5px;padding:2px 8px;border-radius:5px;background:var(--accent-soft);color:var(--accent);flex:none}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news{
  display:flex;gap:14px;padding:14px;border-radius:var(--radius);
  background:var(--surface-2);border:1px solid var(--line);
  transition:transform .22s,border-color .22s;
}
.news:hover{transform:translateY(-3px);border-color:rgba(255,107,61,.4)}
.thumb{width:96px;height:72px;flex:none;border-radius:10px;overflow:hidden;background:#20242e}
.thumb img{width:100%;height:100%;object-fit:cover}
.news h3{font-size:14.5px;font-weight:600;line-height:1.6;margin-bottom:6px}
.news time{font-size:12.5px;color:var(--muted)}

/* 常见问答 */
.faq{display:grid;gap:14px;max-width:920px}
.faq details{
  background:var(--surface-2);border:1px solid var(--line);
  border-radius:14px;padding:0 22px;transition:border-color .2s;
}
.faq details[open]{border-color:rgba(255,107,61,.45)}
.faq summary{
  list-style:none;cursor:pointer;padding:18px 0;font-weight:600;font-size:15.5px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:21px;line-height:1;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.faq p{margin:0 0 20px;color:var(--muted);font-size:14.5px}

/* 页脚 */
.site-footer{background:#0a0c11;border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;margin-bottom:14px}
.footer-about{color:var(--muted);font-size:14px;max-width:330px}
.footer-col h4{font-size:14px;margin-bottom:16px;letter-spacing:.04em}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:14px;transition:color .2s;display:inline-block;padding:3px 0}
.footer-col a:hover{color:var(--accent)}
.copyright{
  border-top:1px solid var(--line);padding:22px 0;font-size:13px;color:#6e7787;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}

/* 响应式 */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .channels{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero-inner{padding:72px 0 62px}
  .section{padding:60px 0}
}
@media (max-width:768px){
  .header-inner{height:auto;flex-wrap:wrap;padding:12px 0;gap:12px}
  .nav{width:100%;margin-left:0;overflow-x:auto;gap:6px;padding-bottom:4px}
  .nav a{white-space:nowrap;padding:8px 13px;font-size:14px}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}
  .rank-list{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .hero-inner{padding:56px 0 48px;max-width:100%}
  .hero h1{margin:18px 0 12px}
  .sec-head{margin-bottom:26px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr);gap:14px}
  .channels{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero h1{font-size:27px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px}
  .btn{padding:0 20px;font-size:15px;flex:1}
  .card-body{padding:11px 12px 13px}
  .rank-bar{width:60px}
  .tag{display:none}
  .thumb{width:84px;height:64px}
  .faq summary{font-size:15px}
}