/* roulang page: index */
*,*::before,*::after{box-sizing:border-box}
:root{
  --green-deep:#0B4A36;--green:#1E8A5F;--clay:#C46A45;--gold:#C9A24B;--lime:#DDF06A;
  --ivory:#F5F4EC;--dark:#0B2E24;--ink:#14201B;--muted:#5B6B63;--paper:#F7F8F2;--line:#E3E2D6;
  --grad:linear-gradient(135deg,#0B4A36 0%,#1E8A5F 100%);
  --r-lg:28px;--r-md:20px;--r-sm:12px;
  --sh:0 12px 32px rgba(11,74,54,.10);--sh-h:0 18px 40px rgba(11,74,54,.16);
  --serif:"Noto Serif SC","Songti SC","Songti TC",serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --num:"Barlow","DIN Alternate",ui-monospace,"SFMono-Regular",monospace;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;color:var(--ink);background:var(--ivory);-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--serif);font-weight:800;line-height:1.2;letter-spacing:-.01em;margin:0}
p{margin:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
[id]{scroll-margin-top:96px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:60;background:rgba(245,244,236,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:20px;height:68px;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:36px;height:36px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:19px;font-weight:800;box-shadow:0 6px 16px rgba(11,74,54,.25)}
.brand-name{font-family:var(--serif);font-size:19px;font-weight:800;white-space:nowrap}
.search{flex:1;max-width:400px;position:relative}
.search input{width:100%;height:44px;border-radius:999px;border:1px solid var(--line);background:#fff;padding:0 46px 0 18px;font-size:14px;outline:none;transition:.2s}
.search input::placeholder{color:#93A09A}
.search input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,162,75,.18)}
.search button{position:absolute;right:6px;top:6px;width:32px;height:32px;border:0;border-radius:999px;background:var(--green-deep);color:#fff;display:grid;place-items:center;cursor:pointer;font-size:13px}
.top-right{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.pill{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;color:var(--muted)}
.pill b{color:var(--green-deep);font-family:var(--num)}
.lang{border-color:transparent;background:transparent;cursor:pointer;color:var(--ink);font-weight:600}
.lang:hover{background:#fff;border-color:var(--line)}

/* 骨架 */
.shell{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:240px minmax(0,1fr)}
.sidebar{border-right:1px solid var(--line);padding:24px 12px 40px 24px}
.toc{position:sticky;top:88px;max-height:calc(100vh - 116px);overflow:auto}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--muted);font-weight:700;margin:0 0 12px;padding-left:12px}
.toc a{position:relative;display:flex;align-items:center;gap:10px;min-height:40px;padding:6px 12px;border-radius:10px;font-size:14px;color:var(--muted);transition:.18s}
.toc a i{font-family:var(--num);font-style:normal;font-size:12px;color:#A9B4AE;width:20px;flex-shrink:0}
.toc a::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:transparent;transition:.18s}
.toc a:hover{background:#fff;color:var(--ink)}
.toc a.active{background:#fff;color:var(--green-deep);font-weight:700}
.toc a.active::before{background:var(--grad)}
.toc a.active i{color:var(--green)}
main{padding:0 24px 72px;min-width:0}

/* 通用 */
.sec{margin-top:56px}
.sec-h{margin-bottom:22px;display:flex;flex-wrap:wrap;align-items:flex-end;gap:8px 24px}
.sec-h h2{font-size:31px}
.sec-sub{margin:0;font-size:15px;color:var(--muted);max-width:660px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:.2s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(11,74,54,.3)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.52);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.15)}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:700;background:#EAF3EE;color:var(--green-deep)}
.tag-gold{background:rgba(201,162,75,.16);color:#8A6D26}

/* 01 首屏 */
.hero{position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--dark);color:#fff;margin-top:24px;isolation:isolate}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45;z-index:-2}
.hero-veil{position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,74,54,.95),rgba(11,46,36,.72) 55%,rgba(30,138,95,.8));z-index:-1}
.hero-in{position:relative;padding:40px 44px 46px}
.hero-in::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.055) 0 1px,transparent 1px 104px),repeating-linear-gradient(0deg,rgba(255,255,255,.055) 0 1px,transparent 1px 104px)}
.hero-nav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;position:relative;z-index:2}
.hero-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid rgba(255,255,255,.3);font-size:14px;color:rgba(255,255,255,.88);transition:.2s}
.hero-nav a:hover{background:rgba(255,255,255,.14);border-color:transparent;color:#fff}
.hero-nav a:first-child{background:var(--lime);color:var(--green-deep);border-color:transparent;font-weight:700}
.hero h1{font-size:clamp(32px,4.2vw,53px);line-height:1.15;max-width:16em}
.hl{background:linear-gradient(100deg,#DDF06A,#C9A24B);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{margin-top:14px;font-size:18px;font-weight:600;color:rgba(255,255,255,.94)}
.hero-p{margin-top:14px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.78);max-width:660px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-stats div{display:flex;align-items:baseline;gap:8px;padding:10px 18px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16)}
.hero-stats b{font-family:var(--num);font-size:20px;font-variant-numeric:tabular-nums;color:var(--lime);line-height:1}
.hero-stats span{font-size:13px;color:rgba(255,255,255,.82)}

/* 02 数据看板 */
.metrics{position:relative;overflow:hidden;border-radius:var(--r-lg);padding:36px 40px 40px;color:#fff;background:linear-gradient(135deg,#0B2E24 0%,#0B4A36 58%,#1E8A5F 100%)}
.metrics::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 84% 12%,rgba(201,162,75,.24),transparent 56%)}
.metrics h2{font-size:29px;position:relative}
.metrics .sec-sub{color:rgba(255,255,255,.68);position:relative;margin-top:8px}
.metrics-grid{display:grid;grid-template-columns:repeat(5,1fr);margin-top:30px;position:relative}
.metric{padding:0 22px;border-left:1px solid rgba(255,255,255,.14)}
.metric:first-child{border-left:0;padding-left:0}
.metric b{display:block;font-family:var(--num);font-size:44px;line-height:1.05;font-variant-numeric:tabular-nums;color:#fff}
.metric span{display:block;font-size:13px;color:rgba(255,255,255,.66);margin-top:6px}
.trend{display:inline-block;margin-top:10px;font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px;background:rgba(221,240,106,.16);color:var(--lime)}

/* 03 分类频道 */
.ch-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.ch-card{display:flex;align-items:flex-start;gap:12px;padding:20px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);transition:.22s}
.ch-card:hover{box-shadow:var(--sh-h);transform:translateY(-3px)}
.ch-ico{width:42px;height:42px;flex-shrink:0;border-radius:14px;background:linear-gradient(140deg,#EAF3EE,#DDF06A);display:grid;place-items:center;font-size:18px;color:var(--green-deep)}
.ch-body{min-width:0;flex:1}
.ch-body strong{display:block;font-family:var(--serif);font-size:17px;margin-bottom:4px}
.ch-body em{font-style:normal;display:block;font-size:13px;line-height:1.6;color:var(--muted)}
.ch-count{display:block;margin-top:10px;font-size:12px;font-family:var(--num);color:var(--green-deep);font-weight:700}
.ch-arrow{color:var(--green);font-size:15px;flex-shrink:0;transition:.2s}
.ch-card:hover .ch-arrow{transform:translateX(4px)}

/* 04 热门视频 */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.vcard{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:12px 12px 16px;transition:.22s}
.vcard:hover{box-shadow:var(--sh-h)}
.vthumb{position:relative;display:block;border-radius:14px;overflow:hidden;aspect-ratio:16/9;background:#E9EDE8}
.vthumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.vcard:hover .vthumb img{transform:scale(1.04)}
.vtime{position:absolute;right:8px;bottom:8px;font-family:var(--num);font-size:12px;padding:2px 8px;border-radius:999px;background:rgba(11,46,36,.84);color:#fff}
.vplay{position:absolute;inset:0;margin:auto;width:48px;height:48px;border-radius:999px;background:rgba(245,244,236,.94);color:var(--green-deep);display:grid;place-items:center;font-size:15px;opacity:0;transform:scale(.86);transition:.22s}
.vcard:hover .vplay{opacity:1;transform:scale(1)}
.vtitle{margin:12px 2px 0;font-size:16px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vmeta{margin:8px 2px 0;font-size:13px;color:var(--muted)}
.vscore{color:var(--clay);font-weight:700;font-family:var(--num)}
.vplays{margin:4px 2px 0;font-size:13px;color:var(--muted);font-family:var(--num)}

/* 05 观看方式对比 */
.cmp-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:#fff}
.cmp{width:100%;border-collapse:collapse;font-size:14px;min-width:600px}
.cmp caption{text-align:left;font-size:13px;color:var(--muted);padding:16px 18px;border-bottom:1px solid var(--line)}
.cmp th{background:var(--green-deep);color:#fff;font-weight:700;text-align:left;padding:14px 18px;white-space:nowrap;font-size:14px}
.cmp td{padding:14px 18px;border-top:1px solid var(--line);vertical-align:top;color:var(--ink)}
.cmp tbody tr:nth-child(even){background:#FAFAF5}
.cmp tbody tr:hover{background:#F0F5F1}
.cmp th:first-child,.cmp td:first-child{position:sticky;left:0;z-index:1}
.cmp td:first-child{background:#fff;font-weight:700}
.cmp tbody tr:nth-child(even) td:first-child{background:#FAFAF5}
.cmp th:first-child{background:var(--green-deep)}

/* 06 最新上传 */
.latest-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 24px}
.litem{display:flex;gap:14px;align-items:center;padding:10px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);transition:.2s}
.litem:hover{box-shadow:var(--sh)}
.litem img{width:160px;height:90px;object-fit:cover;border-radius:10px;flex-shrink:0}
.litem h3{font-size:15px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.litem .lmeta{margin-top:6px;font-size:13px;color:var(--muted);font-family:var(--num)}

/* 07 播放排行 */
.rank{position:relative;overflow:hidden;border-radius:var(--r-lg);padding:36px 40px 40px;color:#fff;background:linear-gradient(150deg,#0B2E24 0%,#0B4A36 62%,#156B4C 100%)}
.rank::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 16% 86%,rgba(201,162,75,.18),transparent 52%)}
.rank h2{font-size:29px;position:relative}
.rank .sec-sub{color:rgba(255,255,255,.66);position:relative;margin-top:8px}
.rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;margin-top:26px;position:relative}
.rank-row{display:flex;align-items:center;gap:14px;padding:12px;border-radius:10px;border-bottom:1px solid rgba(255,255,255,.12);transition:.18s}
.rank-row:hover{background:rgba(255,255,255,.08)}
.rank-num{font-family:var(--serif);font-size:30px;line-height:1;width:40px;flex-shrink:0;color:rgba(255,255,255,.4);font-variant-numeric:tabular-nums}
.rank-row.p1 .rank-num,.rank-row.p2 .rank-num,.rank-row.p3 .rank-num{color:var(--gold)}
.rank-name{flex:1;min-width:0;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-play{font-family:var(--num);font-size:13px;color:rgba(255,255,255,.7);white-space:nowrap}
.medal{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:999px;font-size:11px;font-weight:800;flex-shrink:0;color:#3A2C0B}
.m1{background:#C9A24B}.m2{background:#D8D8D0}.m3{background:#C98B5E}

/* 08 里程碑 */
.mile-track{display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.mile-item{position:relative;padding-top:32px;border-top:1px solid var(--line)}
.mile-item::before{content:"";position:absolute;top:-6px;left:0;width:11px;height:11px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px var(--ivory)}
.mile-item b{display:block;font-family:var(--num);font-size:14px;color:var(--green-deep);margin-bottom:6px}
.mile-item p{font-size:14px;line-height:1.65;color:var(--muted)}

/* 09 片单专题 */
.col-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.col-card{position:relative;display:flex;align-items:flex-end;min-height:220px;border-radius:var(--r-lg);overflow:hidden;color:#fff;isolation:isolate}
.col-card.wide{grid-column:span 2;min-height:260px}
.col-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform .4s}
.col-card:hover img{transform:scale(1.03)}
.col-card::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(11,46,36,.12) 0%,rgba(11,46,36,.86) 100%)}
.col-in{padding:26px}
.col-in strong{display:block;font-family:var(--serif);font-size:22px;margin-bottom:8px}
.col-in em{font-style:normal;display:block;font-size:14px;color:rgba(255,255,255,.82);max-width:44em}
.col-tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:rgba(221,240,106,.92);color:var(--green-deep);font-size:12px;font-weight:700;margin-bottom:10px}

/* 10 视频资讯 */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 36px}
.nitem{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--line);align-items:flex-start}
.nitem img{width:120px;height:90px;object-fit:cover;border-radius:12px;flex-shrink:0}
.nitem h3{font-size:15px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nmeta{margin-top:8px;font-size:13px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.nmeta time{font-family:var(--num)}

/* 11 平台保障 */
.guard{display:grid;grid-template-columns:repeat(4,1fr);padding:28px 8px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.guard-item{padding:0 24px;border-left:1px solid var(--line)}
.guard-item:first-child{border-left:0}
.guard-item span{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,#EAF3EE,#DDF06A);font-size:17px;margin-bottom:12px}
.guard-item strong{display:block;font-size:16px;font-family:var(--serif);margin-bottom:6px}
.guard-item p{font-size:13px;line-height:1.65;color:var(--muted)}

/* 12 快速解答 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{position:relative;padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);transition:.2s}
.step:hover{box-shadow:var(--sh)}
.step::after{content:"";position:absolute;right:-24px;top:52px;width:24px;border-top:2px dashed var(--line)}
.step:last-child::after{display:none}
.step b{display:block;font-family:var(--num);font-size:34px;line-height:1;color:var(--green);opacity:.5;margin-bottom:12px}
.step strong{display:block;font-family:var(--serif);font-size:18px;margin-bottom:8px}
.step p{font-size:14px;line-height:1.7;color:var(--muted)}

/* 13 常见问答 */
.faq{max-width:880px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 22px;margin-bottom:12px;transition:.2s}
.faq details[open]{border-color:rgba(30,138,95,.42);box-shadow:var(--sh)}
.faq summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;padding:20px 0;font-size:16px;font-weight:700;cursor:pointer}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--num);font-size:22px;line-height:1;color:var(--green);transition:transform .2s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 0 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* 14 订阅 */
.sub{display:grid;grid-template-columns:1fr 1fr;gap:44px;padding:40px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh)}
.sub h2{font-size:29px;margin-bottom:12px}
.sub-info p{font-size:15px;line-height:1.8;color:var(--muted)}
.privacy{margin-top:14px;font-size:13px;color:#8A968F;display:flex;gap:8px;align-items:flex-start}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;min-height:48px;border:1px solid var(--line);border-radius:12px;background:var(--ivory);padding:0 14px;font-size:14px;outline:none;transition:.2s}
.field textarea{min-height:88px;padding:12px 14px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,162,75,.2);background:#fff}
.field input.is-error,.field select.is-error{border-color:var(--clay)}
.err{display:block;font-size:12px;color:var(--clay);margin-top:6px}
.sub .btn{width:100%;margin-top:6px}
.form-note{margin-top:12px;font-size:12px;color:#8A968F}

/* 页脚 */
.foot{margin-top:76px;background:var(--dark);color:rgba(247,248,242,.8);padding-top:56px}
.foot-in{max-width:1280px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{box-shadow:none}
.foot-brand span{font-family:var(--serif);font-size:19px;font-weight:800;color:#fff}
.foot p{font-size:14px;line-height:1.75;color:rgba(247,248,242,.62);max-width:30em}
.foot h3{font-family:var(--sans);font-size:14px;font-weight:700;color:#fff;margin:0 0 14px}
.foot a{display:block;font-size:14px;padding:6px 0;min-height:34px;color:rgba(247,248,242,.7);transition:.18s}
.foot a:hover{color:var(--gold);text-decoration:underline;text-underline-offset:4px}
.foot-info p{font-size:13px;line-height:1.9;color:rgba(247,248,242,.6)}
.foot-bottom{margin-top:40px;border-top:1px solid rgba(255,255,255,.1);padding:20px 24px;text-align:center;font-size:12px;color:rgba(247,248,242,.5)}

/* 1024 */
@media (max-width:1024px){
  .shell{grid-template-columns:1fr}
  .sidebar{border-right:0;border-bottom:1px solid var(--line);padding:0}
  .toc{position:sticky;top:68px;display:flex;gap:8px;overflow-x:auto;padding:12px 20px;background:var(--ivory);max-height:none;scrollbar-width:none}
  .toc::-webkit-scrollbar{display:none}
  .toc-title{display:none}
  .toc a{flex-shrink:0;padding:0 14px;min-height:40px;background:#fff;border:1px solid var(--line);border-radius:999px;white-space:nowrap}
  .toc a::before{display:none}
  .toc a.active{background:var(--green-deep);color:#fff;border-color:transparent}
  .toc a.active i{color:var(--lime)}
  main{padding:0 20px 56px}
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .ch-grid{grid-template-columns:repeat(3,1fr)}
  .metrics-grid{grid-template-columns:repeat(3,1fr);row-gap:26px}
  .metric:nth-child(4){border-left:0;padding-left:0}
  .guard{grid-template-columns:repeat(2,1fr);row-gap:26px}
  .guard-item:nth-child(3){border-left:0;padding-left:0}
  .sub{grid-template-columns:1fr;gap:28px;padding:32px}
  .foot-in{grid-template-columns:1fr 1fr;gap:32px}
  .hero-in{padding:34px 32px 38px}
  .metrics,.rank{padding:30px 28px 34px}
}
/* 768 */
@media (max-width:768px){
  .topbar-in{height:auto;padding:10px 16px 12px;gap:10px;flex-wrap:wrap}
  .brand-name{font-size:16px}
  .search{order:3;flex-basis:100%;max-width:none}
  .search input{height:42px}
  .top-right{gap:8px}
  .pill{padding:0 10px;font-size:12px}
  .toc{top:104px;padding:10px 16px}
  main{padding:0 16px 48px}
  .sec{margin-top:44px}
  .sec-h h2{font-size:25px}
  .hero{margin-top:16px}
  .hero-in{padding:26px 22px 30px}
  .hero h1{font-size:30px}
  .hero-lead{font-size:16px}
  .hero-p{font-size:14px}
  .hero-stats div{padding:8px 14px}
  .hero-stats b{font-size:17px}
  .metrics h2,.rank h2,.sub h2{font-size:24px}
  .metrics-grid{grid-template-columns:repeat(2,1fr);row-gap:22px}
  .metric{padding:0 16px}
  .metric:nth-child(3){border-left:0;padding-left:0}
  .metric:nth-child(4){border-left:1px solid rgba(255,255,255,.14);padding-left:16px}
  .metric b{font-size:34px}
  .ch-grid{grid-template-columns:repeat(2,1fr)}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .latest-grid{grid-template-columns:1fr}
  .rank-grid{grid-template-columns:1fr;gap:0}
  .rank{padding:26px 22px 30px}
  .metrics{padding:26px 22px 30px}
  .mile-track{grid-template-columns:1fr;gap:22px}
  .mile-item{border-top:0;border-left:1px solid var(--line);padding:0 0 0 22px}
  .mile-item::before{left:-6px;top:8px;box-shadow:0 0 0 4px var(--ivory)}
  .col-grid{grid-template-columns:1fr}
  .col-card.wide{grid-column:span 1;min-height:220px}
  .news-grid{grid-template-columns:1fr;gap:0}
  .steps{grid-template-columns:1fr}
  .step::after{display:none}
  .guard{grid-template-columns:1fr;padding:22px;row-gap:20px}
  .guard-item{border-left:0;padding:0}
  .sub{padding:24px;gap:22px}
  .foot-in{grid-template-columns:1fr;gap:26px}
  .foot{margin-top:52px;padding-top:40px}
}
/* 520 */
@media (max-width:520px){
  body{font-size:15px}
  .brand-mark{width:32px;height:32px;border-radius:10px;font-size:17px}
  .btn{min-height:46px;padding:0 20px;font-size:14px}
  .hero h1{font-size:26px}
  .hero-btns .btn{flex:1 1 auto}
  .hero-stats{gap:8px}
  .hero-stats div{flex-wrap:wrap;padding:8px 12px}
  .sec-h h2{font-size:22px}
  .sec-sub{font-size:14px}
  .ch-grid{grid-template-columns:1fr}
  .video-grid{gap:12px}
  .vtitle{font-size:14px}
  .litem img{width:112px;height:auto;aspect-ratio:16/9}
  .nitem img{width:96px;height:72px}
  .rank-num{font-size:22px;width:30px}
  .rank-name{font-size:14px}
  .cmp{min-width:520px}
  .foot-bottom{font-size:11px;padding:16px}
}