/* roulang page: index */
:root{
  --ink:#17191C;--ink-2:#3A3F45;--muted:#6B7075;
  --paper:#F7F4EC;--surface:#FFFFFF;--line:#E3DDD0;
  --brand:#F0B429;--brand-strong:#D99A12;--brand-soft:#FFF3D1;
  --accent:#2C6E5B;--accent-soft:#E8F0EC;
  --alert:#C4553B;--dark:#141619;
  --r-s:10px;--r-m:14px;--r-l:20px;--r-xl:28px;
  --sh-s:0 1px 2px rgba(23,25,28,.04);
  --sh-h:0 16px 40px -16px rgba(23,25,28,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-family:"Inter","DIN Alternate",sans-serif;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head h2{font-size:clamp(1.5rem,2.6vw,2.25rem);line-height:1.2;letter-spacing:-.02em;font-weight:700}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:15px;line-height:1.8}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--brand-soft);color:#8A5A00;font-size:12px;font-weight:600}
.eyebrow-green{background:var(--accent-soft);color:var(--accent)}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:12px;background:var(--brand);color:var(--ink);font-size:15px;font-weight:700;transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(217,154,18,.9)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:12px;border:1.5px solid var(--ink);color:var(--ink);font-size:15px;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost:focus-visible{outline:2px solid var(--brand-strong);outline-offset:2px}
.link-line{color:var(--ink);font-weight:600;border-bottom:2px solid var(--brand);padding-bottom:1px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.link-line:hover{color:var(--accent);border-color:var(--accent)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600}
.badge-y{background:var(--brand-soft);color:#8A5A00}
.badge-g{background:var(--accent-soft);color:var(--accent)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}

/* Header */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:38px;border-radius:10px;background:var(--ink);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand-text em{font-size:11px;font-style:normal;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--ink-2);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover{color:var(--ink);background:rgba(240,180,41,.16)}
.nav-link:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.lang-switch{display:inline-flex;align-items:center;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
.lang-item{padding:3px 12px;border-radius:999px;font-size:12px;font-weight:600;color:var(--muted);transition:background .2s var(--ease),color .2s var(--ease)}
.lang-item.is-on{background:var(--ink);color:var(--paper)}
.menu-btn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:inline-flex;align-items:center;justify-content:center;transition:background .2s var(--ease)}
.menu-btn:hover{background:var(--brand-soft)}
.menu-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.mobile-drawer{position:fixed;top:68px;right:0;width:min(320px,86vw);height:calc(100vh - 68px);background:var(--paper);border-left:1px solid var(--line);padding:22px;transform:translateX(105%);transition:transform .28s var(--ease);overflow-y:auto;z-index:70}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-link{display:block;padding:12px 4px;font-size:16px;border-bottom:1px dashed rgba(23,25,28,.16);color:var(--ink-2);transition:color .2s var(--ease)}
.drawer-link:hover{color:var(--accent)}
.drawer-note{margin-top:22px;font-size:13px;color:var(--muted);line-height:1.7}

/* Hero */
.hero{position:relative;padding:56px 0 72px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/f2eeaea9bb9a5215.webp');background-size:cover;background-position:center;opacity:.07;pointer-events:none}
.hero-inner{position:relative}
.hero-main{padding:38px;border-radius:var(--r-xl);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-s)}
.hero-main h1{font-size:clamp(2rem,4.2vw,3.5rem);line-height:1.12;letter-spacing:-.02em;font-weight:700;margin-top:18px}
.hero-sub{margin-top:16px;font-size:18px;font-weight:600;color:var(--accent)}
.hero-lead{margin-top:18px;font-size:15px;line-height:1.85;color:var(--ink-2)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-marks{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;padding-top:22px;border-top:1px dashed rgba(23,25,28,.18)}
.hero-marks li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 auto}
.dot-g{background:var(--accent)}
.side-card{padding:24px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-s)}
.side-card h3{font-size:16px;font-weight:700}
.mini-list{margin-top:14px;display:grid;gap:10px}
.mini-list li{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-2);padding-bottom:9px;border-bottom:1px dashed rgba(23,25,28,.14)}
.mini-list li:last-child{border-bottom:none;padding-bottom:0}
.mini-list span:last-child{color:var(--ink);font-weight:600;text-align:right}
.mini-tile{display:block;padding:20px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.mini-tile:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.mini-tile strong{display:block;font-size:15px;margin-top:8px}
.mini-tile small{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.6}
.hero-strip{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:24px;padding:20px 26px;border-radius:var(--r-l);background:var(--dark);color:#F4EFE4}
.hero-strip p{font-size:14.5px;color:rgba(244,239,228,.82);line-height:1.7}
.hero-strip strong{color:#fff}

/* Versions */
.versions{background:var(--surface);padding:0 0 0;border-top:1px dashed rgba(23,25,28,.14);border-bottom:1px solid var(--line)}
.ver-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;padding:26px 0}
.ver-cells{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));flex:1 1 640px}
.ver-cell{padding:0 18px;border-left:1px solid var(--line)}
.ver-cell:first-child{border-left:none;padding-left:0}
.ver-cell small{display:block;font-size:12px;color:var(--muted)}
.ver-cell strong{display:block;font-size:15px;font-weight:700;margin-top:4px}

/* Download */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.dl-card{padding:28px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-s);display:flex;flex-direction:column;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.dl-icon{width:46px;height:46px;border-radius:12px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}
.dl-card h3{font-size:19px;font-weight:700;margin-top:16px}
.dl-card p{font-size:14px;color:var(--ink-2);margin-top:8px;flex:1}
.dl-file{margin-top:14px;font-size:12.5px;color:var(--muted);font-family:"Inter",sans-serif}
.dl-card .btn-primary{margin-top:18px;width:100%}
.dl-note{margin-top:26px;padding:18px 22px;border-radius:var(--r-m);background:var(--brand-soft);border-left:4px solid var(--brand);font-size:14px;color:#6E4A00;line-height:1.75}

/* Matrix bento */
.matrix{background:var(--paper)}
.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.bento-card{position:relative;display:block;padding:26px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.bento-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.bento-card h3{font-size:18px;font-weight:700;margin-top:14px}
.bento-card p{font-size:14px;color:var(--ink-2);margin-top:8px;line-height:1.75}
.bento-card .arrow{position:absolute;right:22px;bottom:22px;color:var(--muted);transition:transform .22s var(--ease),color .22s var(--ease)}
.bento-card:hover .arrow{transform:translateX(4px);color:var(--accent)}
.bento-big{grid-column:span 6;display:flex;flex-direction:column;justify-content:space-between;padding:0;overflow:hidden}
.bento-big .big-body{padding:28px}
.bento-big img{width:100%;height:220px;object-fit:cover;border-top:1px solid var(--line)}
.span3{grid-column:span 3}
.span4{grid-column:span 4}
.bento-icon{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}

/* Stats dark */
.stats{background:var(--dark);color:#F4EFE4;position:relative;overflow:hidden}
.stats::after{content:"";position:absolute;left:0;right:0;bottom:64px;border-top:1px dashed rgba(255,255,255,.16)}
.stats h2{color:#fff}
.stats .sec-head p{color:rgba(244,239,228,.72)}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.stat-item{padding:26px 22px;border-radius:var(--r-l);border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.03)}
.stat-item .val{font-size:clamp(2.5rem,5vw,4rem);line-height:1;font-weight:700;color:var(--brand)}
.stat-item .lab{margin-top:10px;font-size:14px;font-weight:600;color:#fff}
.stat-item .desc{margin-top:10px;font-size:13px;color:rgba(244,239,228,.7);line-height:1.7}

/* Scenes */
.scene-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.scene-card{padding:26px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h)}
.scene-wide{grid-column:span 6;background:var(--accent-soft);border-color:#CFE0D7}
.scene-4{grid-column:span 6}
.scene-card h3{font-size:18px;font-weight:700}
.scene-card p{font-size:14px;color:var(--ink-2);margin-top:10px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* Flow */
.flow{background:var(--surface)}
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;position:relative}
.flow-step{position:relative;padding-top:8px}
.flow-num{width:46px;height:46px;border-radius:50%;border:2px solid var(--brand);color:var(--ink);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;background:var(--brand-soft)}
.flow-step h3{font-size:17px;font-weight:700;margin-top:16px}
.flow-step p{font-size:14px;color:var(--ink-2);margin-top:8px;line-height:1.75}
.flow-line{position:absolute;top:31px;left:60px;right:0;border-top:1px dashed rgba(23,25,28,.22)}

/* Progress */
.progress-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:start}
.prog-col{grid-column:span 4;padding:24px;border-radius:var(--r-l);border:1px solid var(--line);background:var(--surface)}
.prog-col.is-accent{background:var(--accent-soft);border-color:#CFE0D7}
.prog-col.is-soft{background:var(--brand-soft);border-color:#F0E0B4}
.prog-col h3{font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px}
.prog-col ul{margin-top:16px;display:grid;gap:12px}
.prog-col li{font-size:14px;color:var(--ink-2);padding-left:16px;position:relative;line-height:1.7}
.prog-col li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--accent)}

/* Changelog */
.log{background:var(--surface)}
.log-wrap{display:grid;grid-template-columns:280px minmax(0,1fr);gap:48px}
.log-aside{position:sticky;top:96px;align-self:start}
.log-aside h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.25;font-weight:700}
.log-aside p{font-size:14px;color:var(--ink-2);margin-top:12px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{padding:5px 12px;border-radius:999px;background:var(--paper);border:1px solid var(--line);font-size:12.5px;color:var(--ink-2)}
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;border-left:1px dashed rgba(23,25,28,.24)}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-26px;top:8px;width:11px;height:11px;border-radius:50%;background:var(--brand);border:2px solid var(--surface);box-shadow:0 0 0 2px rgba(240,180,41,.38)}
.tl-item h3{font-size:17px;font-weight:700;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tl-item ul{margin-top:12px;display:grid;gap:8px}
.tl-item li{font-size:14px;color:var(--ink-2);padding-left:16px;position:relative}
.tl-item li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* Topic wall */
.topics{background:var(--paper)}
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.topic-card{position:relative;display:block;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.topic-thumb{position:relative;overflow:hidden}
.topic-thumb img{width:100%;height:200px;object-fit:cover;transition:transform .35s var(--ease)}
.topic-card:nth-child(3n+2) .topic-thumb img{height:250px}
.topic-card:hover .topic-thumb img{transform:scale(1.03)}
.topic-body{padding:20px 22px 24px}
.topic-body h3{font-size:16.5px;font-weight:700;line-height:1.5;transition:color .2s var(--ease)}
.topic-card:hover .topic-body h3{color:var(--brand-strong)}
.topic-body p{margin-top:8px;font-size:13.5px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.topic-meta{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:12.5px;color:var(--muted)}

/* News */
.news{background:var(--surface)}
.news-wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:32px;align-items:start}
.news-lead{display:block;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--paper);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.news-lead:hover{transform:translateY(-2px);box-shadow:var(--sh-h)}
.news-lead img{width:100%;height:250px;object-fit:cover}
.news-lead div{padding:24px}
.news-lead h3{font-size:20px;font-weight:700;line-height:1.5;margin-top:12px}
.news-lead p{margin-top:10px;font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-rows{display:grid;gap:0}
.news-row{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-bottom:1px dashed rgba(23,25,28,.16);transition:background .2s var(--ease)}
.news-row:first-child{padding-top:0}
.news-row:hover h3{color:var(--accent)}
.news-row h3{font-size:15px;font-weight:600;line-height:1.6;transition:color .2s var(--ease);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row .rmeta{font-size:12.5px;color:var(--muted);margin-top:6px}
.news-row .idx{font-size:13px;font-weight:700;color:var(--brand-strong);flex:0 0 auto;padding-top:2px}
.empty-state{padding:40px 26px;border-radius:var(--r-l);background:var(--paper);border:1px dashed var(--line);text-align:center}
.empty-state strong{display:block;font-size:16px;margin-top:12px}
.empty-state p{font-size:14px;color:var(--muted);margin-top:8px}

/* Platform wall */
.platform{background:var(--paper);border-top:1px dashed rgba(23,25,28,.16);border-bottom:1px solid var(--line)}
.plat-wall{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
.plat-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:22px 10px;border-radius:var(--r-m);border:1px solid var(--line);background:var(--surface);filter:grayscale(1);transition:filter .2s var(--ease),transform .2s var(--ease)}
.plat-item:hover{filter:grayscale(0);transform:translateY(-2px)}
.plat-item span{font-size:13px;font-weight:600;color:var(--ink-2);text-align:center}
.plat-note{margin-top:20px;font-size:13px;color:var(--muted)}

/* FAQ */
.faq{background:var(--surface)}
.faq-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:48px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-aside h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.25;font-weight:700}
.faq-aside p{font-size:14px;color:var(--ink-2);margin-top:12px;line-height:1.8}
details.faq-item{border-bottom:1px solid var(--line);padding:4px 0}
details.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 0;font-size:16px;font-weight:600;transition:color .2s var(--ease)}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary:hover{color:var(--accent)}
details.faq-item summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
details.faq-item summary::after{content:"+";font-size:20px;line-height:1;color:var(--brand-strong);flex:0 0 auto}
details.faq-item[open] summary::after{content:"−"}
details.faq-item p{padding:0 0 20px;font-size:14.5px;color:var(--ink-2);line-height:1.85;max-width:760px}

/* Safety bar */
.safety{background:var(--accent-soft);border-top:1px solid #D3E3DA;border-bottom:1px solid #D3E3DA}
.safety-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
.safety-item{padding:0 32px;border-left:1px solid #C9DDD2}
.safety-item:first-child{border-left:none;padding-left:0}
.safety-item h3{font-size:16.5px;font-weight:700;display:flex;align-items:center;gap:10px}
.safety-item p{font-size:14px;color:var(--ink-2);margin-top:10px;line-height:1.8}

/* Channel blocks */
.channels{background:var(--surface)}
.chan-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.chan{position:relative;display:block;padding:26px;border-radius:var(--r-l);border:1px solid var(--line);background:var(--paper);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.chan:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.chan.is-y{background:var(--brand-soft);border-color:#F0E0B4}
.chan.is-g{background:var(--accent-soft);border-color:#CFE0D7}
.chan small{font-size:12px;color:var(--muted)}
.chan h3{font-size:17px;font-weight:700;margin-top:8px}
.chan .go{position:absolute;right:22px;bottom:22px;color:var(--ink-2);transition:transform .22s var(--ease),color .2s var(--ease)}
.chan:hover .go{transform:translateX(4px);color:var(--accent)}

/* CTA form */
.cta{background:var(--dark);color:#F4EFE4}
.cta h2{color:#fff;font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.25;font-weight:700}
.cta p{color:rgba(244,239,228,.76);font-size:14.5px;line-height:1.8;margin-top:14px}
.cta-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);gap:48px;align-items:start}
.cta-list{margin-top:24px;display:grid;gap:10px}
.cta-list li{display:flex;gap:10px;font-size:14px;color:rgba(244,239,228,.82)}
.cta-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:11px;flex:0 0 auto}
.form-card{padding:28px;border-radius:var(--r-l);background:#1D2024;border:1px solid rgba(255,255,255,.12)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:rgba(244,239,228,.75);margin-bottom:6px}
.field input,.field select{width:100%;height:46px;padding:0 14px;border-radius:12px;border:1px solid rgba(255,255,255,.16);background:#F7F4EC;color:var(--ink);font-size:14px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.field input::placeholder{color:var(--muted)}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(240,180,41,.35)}
.form-card .btn-primary{width:100%;margin-top:6px}
.form-tip{margin-top:14px;font-size:12.5px;color:rgba(244,239,228,.6);line-height:1.7}
.form-msg{margin-top:12px;font-size:13px;color:var(--brand);display:none}
.form-msg.is-on{display:block}
.form-msg.is-err{color:#F0A08C}

/* Footer */
.site-footer{background:var(--dark);color:rgba(244,239,228,.78);padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.foot-brand strong{color:#fff;font-size:16px;display:block;margin-top:14px}
.foot-brand p{font-size:13.5px;margin-top:10px;line-height:1.8;color:rgba(244,239,228,.66)}
.foot-brand .domain{margin-top:12px;font-size:12.5px;color:rgba(244,239,228,.5);font-family:"Inter",sans-serif}
.foot-col h4{font-size:13px;color:#fff;font-weight:700;letter-spacing:.04em;margin-bottom:14px}
.foot-col a,.foot-col span{display:block;font-size:13.5px;padding:6px 0;color:rgba(244,239,228,.72);transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:rgba(244,239,228,.5)}

@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .card:hover,.bento-card:hover,.dl-card:hover,.topic-card:hover,.scene-card:hover,.chan:hover,.news-lead:hover,.mini-tile:hover{transform:none!important}
  .topic-card:hover .topic-thumb img{transform:none!important}
}
@media(max-width:1024px){
  .main-nav{display:none}
  .ver-cells{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:18px}
  .ver-cell:nth-child(4){border-left:none;padding-left:0}
  .dl-grid{grid-template-columns:1fr}
  .bento-big{grid-column:span 12}
  .span3,.span4{grid-column:span 6}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-wide,.scene-4{grid-column:span 12}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}
  .flow-line{display:none}
  .prog-col{grid-column:span 12}
  .log-wrap{grid-template-columns:1fr;gap:28px}
  .log-aside{position:static}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .news-wrap{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plat-wall{grid-template-columns:repeat(3,minmax(0,1fr))}
  .safety-grid{grid-template-columns:1fr;gap:24px}
  .safety-item{border-left:none;padding:0}
  .chan-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-wrap{grid-template-columns:1fr;gap:32px}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  section{padding:56px 0}
  .container-x{padding:0 20px}
  .hero{padding:32px 0 48px}
  .hero-main{padding:26px 22px}
  .hero-cta .btn-primary,.hero-cta .btn-ghost{width:100%}
  .ver-cells{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ver-cell{padding:0 0 0 14px}
  .ver-cell:nth-child(2n+1){border-left:none;padding-left:0}
  .span3,.span4{grid-column:span 12}
  .topic-grid{grid-template-columns:1fr}
  .chan-grid{grid-template-columns:1fr}
  .plat-wall{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .news-lead img{height:200px}
  .bento-big img{height:180px}
}

/* roulang page: article */
:root{
  --ink:#17191C;--ink-2:#3A3F45;--muted:#6B7075;
  --paper:#F7F4EC;--surface:#FFFFFF;--line:#E3DDD0;
  --brand:#F0B429;--brand-strong:#D99A12;--brand-soft:#FFF3D1;
  --accent:#2C6E5B;--accent-soft:#E8F0EC;
  --alert:#C4553B;--dark:#141619;
  --r-s:10px;--r-m:14px;--r-l:20px;--r-xl:28px;
  --sh-s:0 1px 2px rgba(23,25,28,.04);
  --sh-h:0 16px 40px -16px rgba(23,25,28,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:12px;background:var(--brand);color:var(--ink);font-size:15px;font-weight:700;transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(217,154,18,.9)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:12px;border:1.5px solid var(--ink);color:var(--ink);font-size:15px;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost:focus-visible{outline:2px solid var(--brand-strong);outline-offset:2px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600}
.badge-y{background:var(--brand-soft);color:#8A5A00}
.badge-g{background:var(--accent-soft);color:var(--accent)}
/* Header */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:10px;background:var(--ink);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand-text em{font-size:11px;font-style:normal;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--ink-2);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover{color:var(--ink);background:rgba(240,180,41,.16)}
.nav-link:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.lang-switch{display:inline-flex;align-items:center;padding:3px;border-radius:999px;border:1px solid var(--line);background:var(--surface)}
.lang-item{padding:3px 12px;border-radius:999px;font-size:12px;font-weight:600;color:var(--muted);transition:background .2s var(--ease),color .2s var(--ease)}
.lang-item.is-on{background:var(--ink);color:var(--paper)}
.header-cta{height:42px;padding:0 18px;font-size:14px;border-radius:10px}
.menu-btn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:none;align-items:center;justify-content:center;transition:background .2s var(--ease)}
.menu-btn:hover{background:var(--brand-soft)}
.menu-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.mobile-drawer{position:fixed;top:68px;right:0;width:min(320px,86vw);height:calc(100vh - 68px);background:var(--paper);border-left:1px solid var(--line);padding:22px;transform:translateX(105%);transition:transform .28s var(--ease);overflow-y:auto;z-index:70}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-link{display:block;padding:12px 4px;font-size:16px;border-bottom:1px dashed rgba(23,25,28,.16);color:var(--ink-2);transition:color .2s var(--ease)}
.drawer-link:hover{color:var(--accent)}
.drawer-note{margin-top:22px;font-size:13px;color:var(--muted);line-height:1.7}
/* Article head */
.article-head{padding:32px 0 8px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--ink-2);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:#C9C1B0}
.crumbs .current{color:var(--muted);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.head-box{margin-top:22px;padding:34px 34px 30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--sh-s);position:relative;overflow:hidden}
.head-box::after{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,var(--brand) 0 42%,var(--accent) 42% 100%)}
.head-box h1{font-size:clamp(1.7rem,3.2vw,2.6rem);line-height:1.28;letter-spacing:-.02em;font-weight:700;margin-top:14px}
.head-lead{margin-top:16px;font-size:15px;line-height:1.9;color:var(--ink-2);max-width:820px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:24px;padding-top:20px;border-top:1px dashed rgba(23,25,28,.18);font-size:13px;color:var(--muted)}
.meta-row strong{color:var(--ink);font-weight:600}
/* Layout */
.article-wrap{padding:44px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-col{min-width:0}
.block{margin-bottom:40px}
.block:last-child{margin-bottom:0}
.block-title{font-size:22px;font-weight:700;letter-spacing:-.01em;line-height:1.4}
.block-title span{color:var(--accent)}
/* TLDR */
.tldr{background:var(--brand-soft);border-radius:var(--r-l);padding:26px 28px;border-left:6px solid var(--brand)}
.tldr h2{font-size:18px;font-weight:700;color:#7A4F00}
.tldr ul{margin-top:14px;display:grid;gap:10px}
.tldr li{position:relative;padding-left:20px;font-size:14px;line-height:1.8;color:#5C4200}
.tldr li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--brand-strong)}
/* Body */
.article-body{max-width:720px;font-size:16px;line-height:1.9;color:var(--ink-2)}
.article-body h2{font-size:24px;line-height:1.45;font-weight:700;color:var(--ink);margin:44px 0 16px;padding-left:14px;border-left:4px solid var(--brand);scroll-margin-top:92px}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:19px;font-weight:700;color:var(--ink);margin:30px 0 12px;scroll-margin-top:92px}
.article-body p{margin:0 0 20px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px;list-style:revert}
.article-body li{margin-bottom:8px}
.article-body ul li::marker{color:var(--accent)}
.article-body ol li::marker{color:var(--accent);font-weight:600}
.article-body a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--brand);text-decoration-thickness:2px;text-underline-offset:4px;transition:color .2s var(--ease),text-decoration-color .2s var(--ease)}
.article-body a:hover{color:var(--accent);text-decoration-color:var(--accent)}
.article-body blockquote{margin:0 0 22px;padding:16px 22px;background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;color:var(--ink-2);font-size:15px}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;margin:26px auto;border:1px solid var(--line)}
.article-body figure{margin:26px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:10px}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:14px;margin:0 0 22px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--paper);font-weight:600;color:var(--ink)}
.article-body pre{background:var(--dark);color:#F4EFE4;padding:18px 20px;border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.7;margin:0 0 22px}
.article-body code{font-family:"Inter","DIN Alternate",ui-monospace,monospace;font-size:.94em}
.article-body hr{border:none;border-top:1px dashed rgba(23,25,28,.2);margin:32px 0}
.empty-state{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:48px 28px;text-align:center;box-shadow:var(--sh-s)}
.empty-state h2{font-size:22px;font-weight:700;color:var(--ink)}
.empty-state p{margin-top:12px;color:var(--muted);font-size:15px}
.empty-state .btn-primary{margin-top:24px}
/* Side */
.article-side{position:sticky;top:88px;display:grid;gap:20px}
.toc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:20px 22px;box-shadow:var(--sh-s)}
.toc-card h3{font-size:14px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px}
.toc-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand)}
.toc-list{margin-top:14px;display:grid;gap:2px}
.toc-list a{display:block;padding:7px 10px;border-left:2px solid transparent;font-size:13.5px;line-height:1.6;color:var(--ink-2);border-radius:0 8px 8px 0;transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease)}
.toc-list a:hover{color:var(--ink);background:var(--paper)}
.toc-list a.is-current{color:var(--ink);font-weight:600;border-left-color:var(--brand);background:var(--brand-soft)}
.toc-empty{font-size:13px;color:var(--muted);margin-top:12px}
.side-note{background:var(--accent-soft);border-radius:var(--r-l);padding:20px 22px}
.side-note h3{font-size:14px;font-weight:700;color:var(--accent)}
.side-note p{font-size:13px;line-height:1.8;color:#255648;margin-top:8px}
.side-note a{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;font-weight:700;color:var(--ink);border-bottom:2px solid var(--brand);padding-bottom:2px}
.side-note a:hover{color:var(--accent);border-bottom-color:var(--accent)}
/* CMS embed lists */
.cms-embed{margin-top:18px}
.cms-embed ul,.cms-embed ol{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.cms-embed li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:16px 18px;box-shadow:var(--sh-s);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);font-size:15px;line-height:1.7;color:var(--ink-2)}
.cms-embed li:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.cms-embed li a{color:var(--ink);font-weight:600;transition:color .2s var(--ease)}
.cms-embed li a:hover{color:var(--accent)}
.cms-embed li span,.cms-embed li time{display:block;font-size:12.5px;color:var(--muted);margin-top:6px}
.muted-note{font-size:14px;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-m);padding:20px 22px}
/* Continue reading */
.post-nav-embed ul{grid-template-columns:1fr 1fr;gap:16px}
/* Editor note */
.editor-note{background:#FBF8F0;border:1px solid var(--line);border-radius:var(--r-m);padding:20px 22px}
.editor-note h2{font-size:15px;font-weight:700;color:var(--ink)}
.editor-note p{font-size:13.5px;line-height:1.85;color:var(--muted);margin-top:8px}
/* CTA */
.article-cta{background:var(--dark);color:#F4EFE4;padding:64px 0}
.cta-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
.article-cta .badge{background:rgba(240,180,41,.14);color:var(--brand);border:1px solid rgba(240,180,41,.4)}
.article-cta h2{font-size:clamp(1.5rem,2.4vw,2rem);font-weight:700;line-height:1.35;margin-top:16px;letter-spacing:-.01em;color:#fff}
.article-cta p{font-size:15px;line-height:1.85;color:rgba(244,239,228,.72);margin-top:14px;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;align-items:center}
.cta-link{font-size:14px;font-weight:600;color:#F4EFE4;border-bottom:2px solid var(--brand);padding-bottom:2px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.cta-link:hover{color:var(--brand);border-bottom-color:var(--brand)}
.dl-grid{display:grid;gap:12px}
.dl-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 20px;border-radius:var(--r-m);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.dl-card:hover{background:rgba(240,180,41,.16);border-color:rgba(240,180,41,.5);transform:translateY(-2px)}
.dl-card:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.dl-card strong{font-size:15px;color:#fff;font-weight:700}
.dl-card span{font-size:12.5px;color:rgba(244,239,228,.6);font-family:"Inter","DIN Alternate",ui-monospace,monospace}
.dl-card .dl-arrow{color:var(--brand);font-weight:700}
/* Footer */
.site-footer{background:var(--dark);color:#F4EFE4;padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.08)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand strong{display:block;margin-top:16px;font-size:15px;color:#fff}
.foot-brand p{font-size:13.5px;line-height:1.8;color:rgba(244,239,228,.68);margin-top:10px;max-width:320px}
.domain{display:inline-block;margin-top:14px;font-size:12px;letter-spacing:.04em;color:rgba(244,239,228,.5)}
.foot-col h4{font-size:13px;font-weight:600;letter-spacing:.06em;color:rgba(244,239,228,.55);margin:0 0 14px}
.foot-col a,.foot-col span{display:block;font-size:14px;color:rgba(244,239,228,.75);margin-bottom:10px;transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:rgba(244,239,228,.6)}
/* Mobile toc */
.mobile-toc{display:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);margin-bottom:24px}
.mobile-toc summary{padding:14px 18px;font-size:14px;font-weight:700;cursor:pointer;list-style:none}
.mobile-toc summary::-webkit-details-marker{display:none}
.mobile-toc .toc-list{padding:0 12px 14px}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}
@media (max-width:1080px){
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .header-cta{display:none}
}
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-side{position:static;order:-1}
  .toc-card{display:none}
  .mobile-toc{display:block}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container-x{padding:0 20px}
  .head-box{padding:26px 22px 24px;border-radius:var(--r-l)}
  .head-lead{font-size:14px}
  .article-wrap{padding:32px 0 56px}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:18px}
  .tldr{padding:22px}
  .post-nav-embed ul{grid-template-columns:1fr}
  .article-cta{padding:52px 0}
  .crumbs .current{max-width:240px}
}
@media (max-width:520px){
  .header-inner{height:64px}
  .mobile-drawer{top:64px;height:calc(100vh - 64px)}
  .brand-text em{display:none}
  .brand-text strong{font-size:15px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn-primary{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .head-box h1{font-size:1.5rem}
  .meta-row{gap:8px 16px;font-size:12.5px}
}

/* roulang page: category1 */
:root{
  --ink:#17191C;--ink-2:#3A3F45;--muted:#6B7075;
  --paper:#F7F4EC;--surface:#FFFFFF;--line:#E3DDD0;
  --brand:#F0B429;--brand-strong:#D99A12;--brand-soft:#FFF3D1;
  --accent:#2C6E5B;--accent-soft:#E8F0EC;
  --alert:#C4553B;--dark:#141619;
  --r-s:10px;--r-m:14px;--r-l:20px;--r-xl:28px;
  --sh-s:0 1px 2px rgba(23,25,28,.04);
  --sh-h:0 16px 40px -16px rgba(23,25,28,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p{margin:0}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:88px 0}
.sec-alt{background:var(--surface)}
.sec-green{background:var(--accent-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--brand-soft);color:#8A5A00;font-size:12px;font-weight:600}
.eyebrow-green{background:var(--accent-soft);color:var(--accent)}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:12px;background:var(--brand);color:var(--ink);font-size:15px;font-weight:700;transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(217,154,18,.9)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:12px;border:1.5px solid var(--ink);color:var(--ink);font-size:15px;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost:focus-visible{outline:2px solid var(--brand-strong);outline-offset:2px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600}
.badge-y{background:var(--brand-soft);color:#8A5A00}
.badge-g{background:var(--accent-soft);color:var(--accent)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.text-link{display:inline-block;color:var(--ink);font-size:14px;font-weight:600;border-bottom:1.5px solid var(--brand);padding-bottom:2px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.text-link:hover{color:var(--accent);border-color:var(--accent)}
.text-link:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:2px}

/* Header */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:10px;background:var(--ink);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.brand-text em{font-size:11px;font-style:normal;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;display:inline-block;padding:8px 11px;font-size:15px;color:var(--ink-2);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover{color:var(--ink);background:rgba(240,180,41,.16)}
.nav-link:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.lang-switch{display:inline-flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
.lang-item{padding:2px 12px;border-radius:999px;font-size:12px;font-weight:600;color:var(--muted);line-height:1.7;transition:background .2s var(--ease),color .2s var(--ease);cursor:pointer}
.lang-item.is-on{background:var(--ink);color:var(--paper)}
.lang-item:not(.is-on):hover{color:var(--ink);background:var(--brand-soft)}
.lang-item:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.nav-cta{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.menu-btn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:none;align-items:center;justify-content:center;transition:background .2s var(--ease)}
.menu-btn:hover{background:var(--brand-soft)}
.menu-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.mobile-drawer{position:fixed;top:68px;right:0;width:min(320px,86vw);height:calc(100vh - 68px);background:var(--paper);border-left:1px solid var(--line);padding:22px;transform:translateX(105%);transition:transform .28s var(--ease);overflow-y:auto;z-index:70}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-link{display:block;padding:12px 4px;font-size:16px;border-bottom:1px dashed rgba(23,25,28,.16);color:var(--ink-2);transition:color .2s var(--ease)}
.drawer-link:hover{color:var(--accent)}
.drawer-link.is-active{color:var(--ink);font-weight:600}
.drawer-note{margin-top:22px;font-size:13px;color:var(--muted);line-height:1.7}

/* 分类页头 */
.page-head{padding:30px 0 0;background:var(--paper);position:relative}
.page-head::after{content:"";display:block;margin-top:44px;border-top:1px dashed rgba(23,25,28,.18)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb a{color:var(--ink-2);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:#B9B3A5}
.crumb .current{color:var(--muted)}
.head-grid{display:grid;grid-template-columns:1.6fr .9fr;gap:36px;align-items:start;margin-top:26px}
.page-title{font-size:clamp(2rem,4vw,3rem);line-height:1.14;letter-spacing:-.02em;font-weight:700;margin-top:16px}
.head-lead{margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--ink-2);max-width:64ch}
.head-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:28px;padding-top:22px;border-top:1px dashed rgba(23,25,28,.18)}
.head-stats strong{display:block;font-size:24px;font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.head-stats span{font-size:12.5px;color:var(--muted)}
.head-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);padding:24px}
.card-title{font-size:16px;font-weight:700;letter-spacing:-.01em}
.mini-list{margin-top:14px;display:grid;gap:10px}
.mini-list li{display:flex;justify-content:space-between;gap:14px;font-size:13px;color:var(--muted);padding-bottom:9px;border-bottom:1px dashed rgba(23,25,28,.14)}
.mini-list li:last-child{border-bottom:none;padding-bottom:0}
.mini-list span:last-child{color:var(--ink);font-weight:600;text-align:right}
.head-card .text-link{margin-top:18px}

/* 筛选条 */
.chips-bar{background:var(--surface);border-bottom:1px solid var(--line);padding:20px 0}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.chip{padding:7px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:13.5px;color:var(--ink-2);transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.chip.is-on{background:var(--ink);color:var(--paper);border-color:var(--ink);font-weight:600}
.chip-note{margin-left:auto;font-size:12.5px;color:var(--muted)}

/* 通用板块头 */
.sec-head{max-width:760px;margin-bottom:34px}
.sec-title{font-size:clamp(1.5rem,2.6vw,2.25rem);line-height:1.25;letter-spacing:-.02em;font-weight:700}
.sec-desc{margin-top:12px;font-size:15px;color:var(--ink-2);line-height:1.85}

/* 教程列表 */
.tut-list{display:grid;gap:18px}
.tut-card{display:grid;grid-template-columns:250px 1fr;gap:22px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.tut-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.tut-thumb{position:relative;aspect-ratio:16/10;border-radius:var(--r-m);overflow:hidden;background:var(--accent-soft)}
.tut-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.tut-card:hover .tut-thumb img{transform:scale(1.03)}
.tut-body{display:flex;flex-direction:column;justify-content:center;min-width:0}
.tut-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:8px}
.tut-time{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.tut-title{font-size:19px;line-height:1.45;font-weight:700;letter-spacing:-.01em}
.tut-desc{margin-top:8px;font-size:14.5px;line-height:1.78;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tut-foot{margin-top:14px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.tag{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
.list-more{margin-top:32px;display:flex;justify-content:center}

/* 精选导读 */
.picked-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.picked-item{display:block;padding:26px 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.picked-item:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.picked-no{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--brand-soft);color:#8A5A00;font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.picked-title{margin-top:14px;font-size:17px;font-weight:700;line-height:1.5}
.picked-why{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-2)}
.picked-go{margin-top:16px;font-size:13px;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:6px}

/* 阅读路径 */
.path-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.path-item{display:flex;align-items:flex-start;gap:14px;padding:20px 22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease)}
.path-item:hover{border-color:var(--accent);background:#FBFDFC;transform:translateY(-1px)}
.path-item:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.path-no{flex:0 0 auto;font-size:12px;font-weight:700;color:#8A5A00;background:var(--brand-soft);border-radius:8px;padding:3px 9px;font-variant-numeric:tabular-nums;line-height:1.6}
.path-text strong{display:block;font-size:15.5px;font-weight:700;line-height:1.6}
.path-text em{display:block;margin-top:2px;font-style:normal;font-size:13.5px;color:var(--muted);line-height:1.7}

/* 版本提示条 */
.notice-wrap{padding:0 0 88px}
.notice{display:flex;align-items:flex-start;gap:18px;padding:26px 28px;border-radius:var(--r-l);background:var(--brand-soft);border:1px solid #F0DFAE}
.notice-icon{flex:0 0 auto;width:40px;height:40px;border-radius:12px;background:var(--brand);display:flex;align-items:center;justify-content:center}
.notice-body{flex:1;min-width:0}
.notice-body strong{display:block;font-size:16.5px;font-weight:700}
.notice-body p{margin-top:6px;font-size:14.5px;line-height:1.8;color:#6B4E0D}
.notice .text-link{flex:0 0 auto;align-self:center}

/* FAQ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 2px;font-size:16px;font-weight:600;line-height:1.6;transition:color .2s var(--ease)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-item summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.faq-ico{position:relative;flex:0 0 auto;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--ink);transition:transform .22s var(--ease),border-color .2s var(--ease)}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink);border-radius:1px}
.faq-ico::before{width:10px;height:1.5px;transform:translate(-50%,-50%)}
.faq-ico::after{width:1.5px;height:10px;transform:translate(-50%,-50%)}
details[open] .faq-ico{transform:rotate(45deg);border-color:var(--brand-strong)}
.faq-a{padding:0 2px 22px;font-size:14.5px;line-height:1.85;color:var(--ink-2);max-width:72ch}

/* 相关专题 */
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.topic-block{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px 26px;border-radius:var(--r-l);border:1px solid var(--line);background:var(--surface);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.topic-block:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.topic-block:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.topic-block.is-yellow{background:var(--brand-soft);border-color:#F0DFAE}
.topic-block.is-green{background:var(--accent-soft);border-color:#D2E2D9}
.topic-name{font-size:16.5px;font-weight:700;letter-spacing:-.01em}
.topic-desc{margin-top:4px;font-size:13.5px;color:var(--ink-2);line-height:1.7}
.topic-arrow{flex:0 0 auto;width:34px;height:34px;border-radius:50%;border:1px solid rgba(23,25,28,.2);display:flex;align-items:center;justify-content:center;transition:transform .22s var(--ease),background .2s var(--ease)}
.topic-block:hover .topic-arrow{transform:translateX(3px);background:var(--surface)}

/* 下载 */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.dl-card{display:flex;flex-direction:column;padding:28px 26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-s);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.dl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:#D6CCB6}
.dl-plat{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;color:var(--accent);background:var(--accent-soft);padding:4px 12px;border-radius:999px;align-self:flex-start}
.dl-name{margin-top:16px;font-size:19px;font-weight:700;letter-spacing:-.01em}
.dl-file{margin-top:6px;font-size:13px;color:var(--muted);word-break:break-all}
.dl-note{margin-top:12px;font-size:14px;line-height:1.75;color:var(--ink-2);flex:1}
.dl-card .btn-primary{margin-top:20px;width:100%}

/* Footer */
.site-footer{background:var(--dark);color:rgba(244,239,228,.82);padding:64px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand strong{display:block;margin-top:16px;font-size:15px;color:#F4EFE4;font-weight:700}
.foot-brand p{margin-top:10px;font-size:13.5px;line-height:1.8;color:rgba(244,239,228,.66);max-width:34ch}
.foot-brand .domain{display:inline-block;margin-top:14px;font-size:12.5px;letter-spacing:.04em;color:var(--brand)}
.foot-col h4{font-size:13px;font-weight:700;color:#F4EFE4;letter-spacing:.06em;margin-bottom:14px}
.foot-col a,.foot-col span{display:block;font-size:13.5px;line-height:1.7;color:rgba(244,239,228,.66);padding:4px 0;transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-col a:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:2px}
.foot-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;font-size:12.5px;color:rgba(244,239,228,.55)}

/* 响应式 */
@media (max-width:1023px){
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .nav-cta{display:none}
  .sec{padding:64px 0}
  .head-grid{grid-template-columns:1fr;gap:26px}
  .picked-grid{grid-template-columns:1fr}
  .path-grid{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .tut-card{grid-template-columns:200px 1fr;gap:18px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .notice-wrap{padding:0 0 64px}
}
@media (max-width:767px){
  .container-x{padding:0 20px}
  .chips-bar{padding:16px 0}
  .chip-note{margin-left:0;width:100%}
  .tut-card{grid-template-columns:1fr;padding:14px}
  .tut-thumb{aspect-ratio:16/10}
  .tut-title{font-size:17.5px}
  .notice{flex-direction:column;gap:14px;padding:22px}
  .notice .text-link{align-self:flex-start}
  .head-stats{gap:24px}
}
@media (max-width:639px){
  .sec{padding:52px 0}
  .page-head{padding:22px 0 0}
  .page-head::after{margin-top:34px}
  .page-title{font-size:clamp(1.6rem,7.4vw,2.2rem)}
  .head-lead{font-size:14.5px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:44px 0 22px}
  .btn-primary,.btn-ghost{width:100%}
  .list-more .btn-ghost{width:100%}
  .foot-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  html{scroll-behavior:auto}
  .tut-card:hover,.picked-item:hover,.topic-block:hover,.dl-card:hover,.path-item:hover{transform:none}
  .tut-card:hover .tut-thumb img{transform:none}
}