/* 欧易注册指南 · 浅色青柠（基于 02-浅色青柠 / PAPER 模板） */
:root{--bg:#f5f7eb;--fg:#111511;--panel:#eff6d8;--muted:#454943;--soft:#6a6e66;--accent:#caee69;--accent-deep:#6e8040;--on-accent:#10140f;--line:#c3c5bb}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
a{color:inherit;text-decoration:none}
a,summary,button{cursor:pointer}
a:focus-visible,summary:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--fg);outline-offset:4px}
::selection{background:var(--accent);color:var(--on-accent)}
h1,h2,h3,p,figure,ul,ol{margin:0}
h1,h2,h3{text-wrap:balance}
img{display:block;max-width:100%;height:auto}
.wrap{width:min(1280px,calc(100% - 88px));margin-inline:auto}
.nw{white-space:nowrap}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* 顶部提示 + 导航 */
.notice{text-align:center;padding:9px 16px;background:var(--panel);font-size:12px;line-height:1.6;border-bottom:1px solid var(--line);color:var(--muted)}
.notice b{color:var(--fg)}
.nav{min-height:84px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line)}
.identity{display:flex;align-items:center;gap:14px;min-height:48px;flex:none}
.mark{display:grid;grid-template-columns:repeat(3,1fr);width:30px;height:30px;flex:none}
.mark i{background:var(--fg)}.mark i:nth-child(2n){background:transparent}
.identity b{font-size:17px;letter-spacing:-.03em;line-height:1.2;display:block}
.identity small{display:block;font-size:11px;color:var(--muted);line-height:1.5;margin-top:2px}
.nav nav{display:flex;gap:24px;margin-left:12px}
.nav nav a{min-height:48px;display:inline-flex;align-items:center;font-size:14px;color:var(--muted)}
.nav nav a:hover,.nav nav a[aria-current=page]{color:var(--fg);text-decoration:underline;text-underline-offset:6px}
.nav-end{margin-left:auto;display:flex;align-items:center;gap:12px;flex:none}
.code-chip{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 6px 0 12px;border:1px solid var(--line);font:12px "Courier New",monospace;letter-spacing:.06em;color:var(--muted)}
.code-chip b{font:700 15px Arial;letter-spacing:.02em;color:var(--fg)}
.code-chip button{font:600 12px Arial;min-height:32px;padding:0 10px;border:0;background:var(--fg);color:var(--bg)}

/* 按钮与链接 */
.btn{display:inline-flex;align-items:center;justify-content:space-between;gap:30px;padding:13px 22px;min-height:50px;border:1px solid var(--fg);background:var(--fg);color:var(--bg);font-size:15px;font-weight:700;line-height:1.4;transition:transform .18s,box-shadow .18s}
.btn span{font-size:19px;line-height:1}
.btn:hover{transform:translateY(-2px);box-shadow:0 5px 0 rgba(17,21,17,.14)}
.btn.small{min-height:44px;padding:10px 16px;gap:16px;font-size:14px}
.btn.lime{background:var(--accent);color:var(--on-accent);border-color:var(--on-accent)}
.btn.ghost{background:transparent;color:var(--fg);border-color:transparent;padding-inline:0;gap:16px}
.btn.ghost:hover{box-shadow:none;transform:none;text-decoration:underline;text-underline-offset:5px}
.text-link{display:inline-flex;align-items:center;gap:22px;min-height:46px;font-size:14px;font-weight:600;border-bottom:1px solid currentColor;margin-top:18px}
.text-link:hover{opacity:.7}
.eyebrow,.micro{font:11px/1.7 "Courier New",monospace;letter-spacing:.08em}
.eyebrow{display:flex;align-items:center;gap:10px;color:var(--muted)}
.eyebrow>i{display:block;width:7px;height:7px;background:var(--accent-deep)}
.mini-check{display:inline-block;width:24px;height:24px;flex:none;background:conic-gradient(currentColor 25%,transparent 0 50%,currentColor 0 75%,transparent 0) 0 0/16px 16px}

/* 字体层级 */
h1{font-size:clamp(46px,5.4vw,80px);line-height:1.12;font-weight:900;letter-spacing:-.06em;margin:22px 0 24px}
h1 em{font-style:normal;font-weight:400;letter-spacing:-.055em}
h2{font-size:clamp(30px,3.2vw,46px);line-height:1.22;letter-spacing:-.045em}
h3{font-size:22px;line-height:1.38;letter-spacing:-.03em}
p{font-size:16px;line-height:1.85;color:var(--muted)}
strong{color:var(--fg)}

/* 首屏：错位封面 */
.hero{display:grid;grid-template-columns:1fr 1.1fr;grid-template-areas:"copy media" "feature media" "meta meta";gap:26px 64px;padding-block:44px 40px}
.hero-copy{grid-area:copy;min-width:0;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}
.hero-copy>p{max-width:33ch}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;margin-top:28px}
.hero-media{grid-area:media;position:relative;min-width:0;min-height:520px;background:var(--panel);overflow:hidden;margin:20px 0 40px;transform:rotate(2deg)}
.hero-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.hero-media:hover img{transform:scale(1.03)}
.hero-media figcaption{position:absolute;left:24px;right:24px;bottom:18px;display:flex;justify-content:space-between;gap:20px;font:10px/1.6 "Courier New",monospace;letter-spacing:.06em;color:var(--muted)}
.hero-feature{grid-area:feature;position:relative;z-index:2;background:var(--accent);color:var(--on-accent);padding:24px 28px;margin-right:-60px;margin-top:-18px;transform:rotate(-2deg);box-shadow:7px 7px 0 rgba(17,21,17,.14);display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px 22px}
.hero-feature .feature-top{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between}
.hero-feature .code{font:900 40px/1 Arial;letter-spacing:-.02em}
.hero-feature .code-label{font-size:13px;line-height:1.6;color:var(--on-accent);margin-top:6px;max-width:none}
.hero-feature .feature-btns{display:flex;flex-direction:column;gap:8px}
.copy-btn{font:700 14px Arial;min-height:46px;padding:0 18px;border:1px solid var(--on-accent);background:transparent;color:var(--on-accent);transition:background .2s,color .2s}
.copy-btn:hover,.copy-btn.done{background:var(--on-accent);color:var(--accent)}
.hero-meta{grid-area:meta;display:flex;justify-content:space-between;gap:16px;padding-top:18px;border-top:1px solid var(--line);font:11px/1.7 "Courier New",monospace;letter-spacing:.06em;color:var(--muted)}

/* 章节条 + 数字条 */
.chapter{display:flex;align-items:center;justify-content:space-between;gap:30px;border-block:1px solid var(--line);padding-block:18px;color:var(--muted)}
.chapter .mini-check{color:var(--fg);width:22px;height:22px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.stats>div{padding:26px 24px;border-right:1px solid var(--line)}
.stats>div:first-child{padding-left:0}.stats>div:last-child{border-right:0}
.stats b{display:block;font:900 34px/1.1 Arial;letter-spacing:-.04em}
.stats span{display:block;font-size:13px;line-height:1.7;color:var(--muted);margin-top:8px}

/* 通用区块 */
.section{padding-block:88px}
.section-head{display:grid;grid-template-columns:1fr 1fr;align-items:end;gap:40px;border-bottom:1px solid var(--line);padding-bottom:28px;margin-bottom:40px}
.section-head h2{margin-top:16px}
.section-head>p{max-width:38ch;justify-self:end}
.section-head.center{display:flex;flex-direction:column;align-items:center;text-align:center;border:0;gap:18px;padding:0}
.section-head.center>p{justify-self:auto}

/* 内容卡片：主次展台 */
.bento{display:grid;grid-template-columns:1.12fr 1fr;gap:22px}
.card{position:relative;min-width:0;background:var(--panel);border:1px solid var(--line);padding:28px}
.card-kicker{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:38px}
.card-index{font:300 38px/1 Arial;letter-spacing:-.06em;opacity:.5}
.card-art{color:var(--fg)}
.card-art svg{width:100%;height:100%;display:block}
.card h3{font-size:24px;margin-bottom:14px}
.card p{max-width:40ch}
.card .tag{display:inline-block;margin-top:16px;font:11px "Courier New",monospace;letter-spacing:.06em;border:1px solid currentColor;padding:6px 9px;opacity:.8}
.bento .card:first-child{grid-row:span 2;padding:36px;display:flex;flex-direction:column}
.bento .card:first-child .card-art{height:300px;flex:1;margin-block:18px 26px}
.bento .card:first-child h3{font-size:30px}
.bento .card:not(:first-child){display:grid;grid-template-columns:120px 1fr;gap:18px 26px}
.bento .card:not(:first-child) .card-kicker{grid-column:1/-1}
.bento .card:not(:first-child) .card-art{height:130px;align-self:center}
.tone-ink{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.tone-ink p{color:#c9ccc2}.tone-ink strong{color:var(--accent)}
.tone-ink .card-art{color:var(--accent)}
.big-num{font:900 clamp(64px,8vw,120px)/.9 Arial;letter-spacing:-.07em;color:var(--accent)}

/* 三列卡片 */
.cards3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.cards3 .card{display:flex;flex-direction:column;gap:18px}
.cards3 .card:nth-child(3n+2){background:transparent}
.cards3 .card h3{margin:0}
.cards3 .card .text-link{margin-top:auto;align-self:flex-start}
.step-dot{width:48px;height:48px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font:16px Arial;flex:none}
.cards3 .ico{font:32px/1 Arial;color:var(--accent-deep)}

/* 对比表 */
.compare{border:1px solid var(--line);background:var(--bg)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:560px;font-size:15px}
th{font:11px "Courier New",monospace;letter-spacing:.06em;color:var(--muted);text-align:left;font-weight:400;padding:16px 20px;border-bottom:1px solid var(--line)}
td{padding:18px 20px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.6}
td small{display:block;color:var(--muted);font-size:12px}
tr:last-child td{border-bottom:0}
td.hl,th.hl{background:var(--accent);color:var(--on-accent)}
th.hl{font-weight:700}
.compare-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px;border-top:1px solid var(--line);background:var(--panel)}
.compare-foot p{font-size:14px;max-width:none}

/* 路线图（细节行） */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px}
.split-lead{min-width:0}
.split-lead h2{margin:16px 0 22px}
.split-lead .big-num{color:var(--fg);opacity:.16;margin-top:30px}
.lines{min-width:0}
.line{display:grid;grid-template-columns:44px minmax(0,1fr) 20px;gap:20px;padding:26px 0;border-top:1px solid var(--line)}
.line:last-child{border-bottom:1px solid var(--line)}
.line>b{font:400 22px/1.4 Georgia,serif}
.line h3{margin-bottom:10px}
.line p{max-width:46ch}
.line .text-link{margin-top:8px;font-size:13px}
.line>span{font-size:19px;line-height:1.6}
.panel{background:var(--panel);border:1px solid var(--line);padding:48px}

/* 六宫格 */
.grid6{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line)}
.grid6 article{padding:30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0}
.grid6 article:nth-child(3n){border-right:0}
.grid6 article:nth-last-child(-n+3){border-bottom:0}
.grid6 .ico{display:block;font:34px/1 Arial;margin:18px 0 16px;color:var(--accent-deep)}
.grid6 h3{font-size:20px;margin-bottom:8px}
.grid6 p{font-size:15px}

/* 热搜标签 */
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tags a{display:inline-flex;align-items:center;min-height:40px;padding:8px 14px;border:1px solid var(--line);font-size:14px;color:var(--muted);background:var(--bg);transition:background .15s,color .15s}
.tags a:hover{background:var(--accent);color:var(--on-accent);border-color:var(--on-accent)}
.tags a.hot{border-color:var(--fg);color:var(--fg);font-weight:600}
.tags a.hot:before{content:"热";font:700 10px Arial;background:var(--fg);color:var(--accent);padding:2px 4px;margin-right:8px}

/* 问答面板 */
.qa{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;background:var(--panel);border:1px solid var(--line);padding:46px;margin-block:88px}
.qa-lead h2{margin-top:16px}
.qa-lead p{margin-top:20px;max-width:32ch}
.qa-list{min-width:0}
details{border-bottom:1px solid var(--line)}
summary{display:flex;align-items:center;justify-content:space-between;gap:22px;font-size:17px;font-weight:600;min-height:72px;padding:20px 0;list-style:none;line-height:1.5}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";font-size:24px;font-weight:400;flex:none}
details[open] summary:after{content:"−"}
details p{padding-bottom:24px;max-width:56ch}
details p+p{margin-top:-12px}

/* 票券收尾 */
.outro{display:grid;grid-template-columns:120px minmax(0,1fr) auto;align-items:center;gap:36px;padding:40px 42px;margin-bottom:80px;background:var(--accent);color:var(--on-accent);border-block:2px solid var(--on-accent);position:relative;overflow:clip}
.outro:before,.outro:after{content:"";width:12px;height:24px;position:absolute;left:0;top:calc(50% - 12px);border-radius:0 12px 12px 0;background:var(--bg)}
.outro:after{left:auto;right:0;border-radius:12px 0 0 12px}
.outro-index{font:300 72px/.9 Arial;letter-spacing:-.07em;padding-right:22px;border-right:1px dashed currentColor;white-space:nowrap}
.outro h2{font-size:clamp(28px,3vw,40px);margin-top:12px}
.outro p{color:var(--on-accent);font-size:14px;margin-top:8px;max-width:none}
.outro .btn{background:var(--on-accent);color:var(--accent);border-color:var(--on-accent);white-space:nowrap}

/* 文章页 */
.crumbs{display:flex;flex-wrap:wrap;gap:8px;padding-top:26px;font-size:13px;color:var(--muted)}
.crumbs a{text-decoration:underline;text-underline-offset:4px}
.article-hero{display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:end;padding-block:26px 50px;border-bottom:1px solid var(--line)}
.article-hero h1{font-size:clamp(38px,4.4vw,64px);margin-bottom:20px}
.article-hero .lede{max-width:46ch;font-size:17px}
.byline{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:22px;font:12px/1.6 "Courier New",monospace;letter-spacing:.04em;color:var(--muted)}
.code-card{background:var(--accent);color:var(--on-accent);padding:26px;transform:rotate(-1.5deg);box-shadow:7px 7px 0 rgba(17,21,17,.14)}
.code-card .micro{display:flex;justify-content:space-between}
.code-card .code{display:block;font:900 42px/1 Arial;letter-spacing:-.02em;margin:18px 0 8px}
.code-card p{color:var(--on-accent);font-size:14px;line-height:1.7}
.code-card .row{display:flex;gap:8px;margin-top:18px}
.code-card .row .btn{flex:1;background:var(--on-accent);color:var(--accent);border-color:var(--on-accent);gap:12px}
.layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:64px;padding-block:56px 30px}
.toc{position:sticky;top:24px;align-self:start;border-top:2px solid var(--fg);padding-top:16px}
.toc b{display:block;font:11px "Courier New",monospace;letter-spacing:.08em;color:var(--muted);margin-bottom:10px}
.toc a{display:block;padding:9px 0;font-size:14px;color:var(--muted);border-bottom:1px solid var(--line);line-height:1.5}
.toc a:hover{color:var(--fg)}
.toc .btn{width:100%;margin-top:18px;font-size:14px;color:var(--bg);border-bottom:1px solid var(--fg);padding:10px 16px}
.toc .btn:hover{color:var(--bg)}
.prose{min-width:0;max-width:780px}
.prose>section{padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid var(--line)}
.prose>section:last-child{border-bottom:0}
.prose h2{font-size:clamp(26px,2.6vw,36px);margin:10px 0 20px}
.prose h3{font-size:20px;margin:28px 0 10px}
.prose p{max-width:none;margin-bottom:14px}
.prose ul,.prose ol{padding-left:22px;margin:6px 0 16px;color:var(--muted);font-size:16px;line-height:1.85}
.prose li{margin-bottom:6px}
.prose li::marker{color:var(--accent-deep);font-weight:700}
.prose table{margin:14px 0 8px}
.prose .compare{margin:18px 0}
.prose .compare table{margin:0}
.callout{border-left:4px solid var(--accent-deep);background:var(--panel);padding:18px 22px;margin:18px 0}
.callout p{margin:0;font-size:15px}
.callout.warn{border-left-color:#b4452f;background:#f7eadf}
.callout.cta{display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid var(--on-accent);border-left-width:4px;background:var(--accent)}
.callout.cta p{color:var(--on-accent)}
.steps{list-style:none;padding:0!important;counter-reset:s;margin:18px 0}
.steps li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:16px;padding:18px 0;border-top:1px solid var(--line);margin:0}
.steps li:before{content:counter(s,decimal-leading-zero);font:400 20px/1.5 Georgia,serif;color:var(--fg)}
.steps li b{display:block;color:var(--fg);font-size:17px;margin-bottom:4px}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:10px}
.related a{display:block;border:1px solid var(--line);padding:20px;background:var(--panel);min-height:120px}
.related a:hover{border-color:var(--fg)}
.related small{display:block;font:11px "Courier New",monospace;letter-spacing:.06em;color:var(--muted);margin-bottom:8px}
.related b{font-size:17px;line-height:1.45}

/* 手续费计算器 */
.calc-wrap{display:grid;grid-template-columns:360px minmax(0,1fr);border:1px solid var(--line);background:var(--bg)}
.calc{padding:28px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:18px;background:var(--panel)}
.calc label{display:block;font:11px "Courier New",monospace;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}
.calc input,.calc select{width:100%;min-height:48px;background:var(--bg);border:1px solid var(--line);color:var(--fg);font:16px Arial;padding:10px 14px}
.preset{display:flex;flex-wrap:wrap;gap:8px}
.preset button{font:13px Arial;min-height:38px;padding:0 12px;background:transparent;color:var(--muted);border:1px solid var(--line)}
.preset button:hover{color:var(--fg);border-color:var(--fg)}
.calc-out{padding:28px;display:flex;flex-direction:column;justify-content:center;gap:12px}
.calc-out .row{display:flex;justify-content:space-between;gap:12px;font-size:15px;color:var(--muted);padding-bottom:12px;border-bottom:1px solid var(--line)}
.calc-out .row b{color:var(--fg)}
.calc-total{background:var(--accent);color:var(--on-accent);padding:22px;margin-top:8px}
.calc-total b{display:block;font:900 44px/1.1 Arial;letter-spacing:-.04em;margin-top:6px}

/* 页脚 */
.risk{border-top:1px solid var(--line);padding:30px 0 0}
.risk p{font-size:13px;max-width:none}
.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:36px 0;border-top:1px solid var(--line);margin-top:30px}
.footer-links b{display:block;font:11px "Courier New",monospace;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
.footer-links a{display:block;font-size:14px;padding:7px 0;color:var(--muted)}
.footer-links a:hover{color:var(--fg)}
.footer{display:flex;align-items:center;justify-content:space-between;gap:30px;padding-block:28px 36px;border-top:1px solid var(--line)}
.footer p{font-size:12px;max-width:none}
.footer>a{font-size:13px;min-height:44px;display:inline-flex;align-items:center}

/* 手机底部常驻注册条 */
.dock{display:none}

@media(max-width:1150px){
  .wrap{width:calc(100% - 56px)}
  .nav nav{gap:18px;margin-left:0}
  .nav nav a:nth-child(n+6){display:none}
  .hero{column-gap:36px}
  .hero-feature{margin-right:-30px}
  .hero-feature .code{font-size:34px}
  .split,.qa{gap:44px}
  .layout{grid-template-columns:210px minmax(0,1fr);gap:40px}
}
@media(max-width:980px){
  .nav{flex-wrap:wrap;row-gap:0;padding-top:10px}
  .nav nav{order:3;width:100%;margin:0 -2px;gap:4px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;border-top:1px solid var(--line)}
  .nav nav::-webkit-scrollbar{display:none}
  .nav nav a,.nav nav a:nth-child(n+6){display:inline-flex;flex:none;min-height:46px;padding:0 10px;font-size:14px}
  .nav nav a[aria-current=page]{text-decoration:none;box-shadow:inset 0 -2px 0 var(--fg)}
  .calc-wrap{grid-template-columns:1fr}.calc{border-right:0;border-bottom:1px solid var(--line)}
  .layout{grid-template-columns:1fr}.toc{display:none}
  .article-hero{grid-template-columns:1fr;gap:30px}
  .code-card{max-width:440px}
}
@media(max-width:820px){
  .hero{grid-template-columns:1fr;grid-template-areas:"copy" "feature" "media" "meta";gap:26px;padding-top:30px}
  .hero-feature{margin:0;transform:rotate(-1.5deg)}
  .hero-media{min-height:320px;margin:0;transform:rotate(1.5deg)}
  .stats{grid-template-columns:1fr 1fr}
  .stats>div{padding:20px 16px 20px 0;border-right:0;border-bottom:1px solid var(--line)}
  .stats>div:nth-child(odd){border-right:1px solid var(--line)}
  .stats>div:nth-child(even){padding-left:16px}
  .stats>div:nth-last-child(-n+2){border-bottom:0}
  .bento{grid-template-columns:1fr}
  .bento .card:first-child{grid-row:auto}
  .bento .card:first-child .card-art{height:200px}
  .cards3{grid-template-columns:1fr}
  .cards3 .card:nth-child(3n+2){background:var(--panel)}
  .cards3 .card:nth-child(even){background:transparent}
  .split{grid-template-columns:1fr;gap:26px}
  .split-lead .big-num{display:none}
  .panel{padding:30px 24px}
  .grid6{grid-template-columns:1fr 1fr}
  .grid6 article,.grid6 article:nth-last-child(-n+3){border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .grid6 article:nth-child(2n){border-right:0}
  .grid6 article:nth-last-child(-n+2){border-bottom:0}
  .qa{grid-template-columns:1fr;padding:30px 24px;gap:22px}
  .outro{grid-template-columns:1fr;gap:18px;padding:32px 28px}
  .outro-index{border-right:0;padding:0 0 14px;border-bottom:1px dashed currentColor;font-size:56px}
  .related{grid-template-columns:1fr}
  .footer-links{grid-template-columns:1fr 1fr}
  .section-head{grid-template-columns:1fr;gap:16px}.section-head>p{justify-self:start}
}
@media(max-width:680px){
  .wrap{width:calc(100% - 32px)}
  .notice{font-size:11px;padding:8px 12px}
  .nav{min-height:0;gap:12px}
  .nav .identity{min-height:52px}
  .identity b{font-size:15px}
  .code-chip{display:none}
  h1{font-size:clamp(36px,10.4vw,48px);letter-spacing:-.05em}
  h2{font-size:30px}
  p{font-size:16px}
  .section{padding-block:56px}
  .hero-feature{grid-template-columns:1fr;padding:22px}
  .hero-feature .feature-btns{flex-direction:row}
  .hero-feature .feature-btns>*{flex:1}
  .hero-meta{flex-direction:column;gap:4px}
  .chapter .micro:last-child{display:none}
  .stats b{font-size:26px}
  .card,.bento .card:first-child{padding:24px}
  .bento .card:not(:first-child){grid-template-columns:80px 1fr;gap:14px 18px}
  .bento .card:not(:first-child) .card-art{height:90px}
  .grid6{grid-template-columns:1fr}
  .grid6 article,.grid6 article:nth-last-child(-n+3),.grid6 article:nth-child(2n){border-right:0;border-bottom:1px solid var(--line)}
  .grid6 article:last-child{border-bottom:0}
  .line{grid-template-columns:32px minmax(0,1fr);gap:12px}
  .line>span{display:none}
  .compare-foot,.callout.cta{flex-direction:column;align-items:flex-start}
  table{min-width:0;font-size:14px}
  td,th{padding:13px 10px}
  th{letter-spacing:0}
  .footer{flex-direction:column;align-items:flex-start;gap:10px}
  .footer-links{gap:10px 20px}
  .dock{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;gap:8px;align-items:center;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:var(--fg);color:var(--bg);box-shadow:0 -6px 20px rgba(0,0,0,.18)}
  .dock .d-code{flex:1;min-width:0;font-size:12px;line-height:1.35;color:#c9ccc2}
  .dock .d-code b{display:block;font:900 19px Arial;color:var(--accent);letter-spacing:.01em}
  .dock button{font:700 13px Arial;min-height:44px;padding:0 12px;background:transparent;color:var(--bg);border:1px solid #5b6057}
  .dock a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;background:var(--accent);color:var(--on-accent);font:700 14px Arial}
  body{padding-bottom:76px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* 语言切换 */
.lang{display:inline-flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);flex:none;white-space:nowrap}
.lang a{display:inline-flex;align-items:center;justify-content:center;min-width:42px;min-height:40px;padding:6px 9px;font:600 12px/1.2 Arial,"Microsoft YaHei",sans-serif;color:var(--muted)}
.lang a[aria-current=page]{background:var(--fg);color:var(--bg)}
.lang a:not([aria-current]):hover{color:var(--fg);text-decoration:underline;text-underline-offset:4px}

/* 英文排版：拉丁字母字距比中文松 */
html:lang(en) h1{font-size:clamp(40px,4.8vw,70px);line-height:1.06;letter-spacing:-.045em}
html:lang(en) h1 em{letter-spacing:-.035em}
html:lang(en) h2{letter-spacing:-.035em;line-height:1.15}
html:lang(en) h3{letter-spacing:-.02em}
html:lang(en) .article-hero h1{font-size:clamp(34px,4vw,58px)}
html:lang(en) .hero-copy>p{max-width:38ch}
html:lang(en) summary{font-weight:600}
@media(max-width:680px){
  .nav-end{gap:8px}
  .lang a{min-width:38px;padding:6px 7px}
  .nav-end .btn.small{padding:10px 12px;gap:10px}
  .identity small{display:none}
  html:lang(en) h1{font-size:clamp(32px,9.4vw,44px)}
  html:lang(en) .article-hero h1{font-size:clamp(30px,8.6vw,40px)}
}
@media(max-width:360px){.identity b{font-size:14px}.mark{width:24px;height:24px}}
html:lang(en) .tags a.hot:before{content:"HOT"}
@media(max-width:680px){.nav-end>.btn.small{display:none}}