:root{
  /* 品牌色 */
  --brand:#E8341C;
  --brand-2:#FF7A2F;
  --brand-grad:linear-gradient(135deg,#FF4D2E 0%,#FF8A3D 100%);
  /* 深色（头部 / Hero） */
  --ink:#151B2B;
  --ink-2:#1E2536;
  --hero-1:#123A4A;
  --hero-2:#1A2F45;
  /* 中性 */
  --text:#1F2430;
  --text-2:#5A6376;
  --text-3:#8A93A6;
  --line:#E8EBF0;
  --line-2:#F0F2F6;
  --bg:#F5F7FA;
  --white:#fff;
  /* 语义 */
  --success:#12A150;
  --info:#2563EB;
  /* 尺寸 */
  --radius-s:8px;
  --radius:12px;
  --radius-l:16px;
  --maxw:1200px;
  --shadow-1:0 1px 2px rgba(21,27,43,.04),0 2px 8px rgba(21,27,43,.04);
  --shadow-2:0 4px 16px rgba(21,27,43,.08);
  --shadow-3:0 12px 32px rgba(21,27,43,.12);
  --header-h:60px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  font-size:14px;line-height:1.7;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{border:0;background:none;cursor:pointer;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ============ 顶部导航 ============ */
.hd{position:sticky;top:0;z-index:100;background:var(--ink);color:#fff}
.hd-in{display:flex;align-items:center;gap:24px;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.logo-mark{width:30px;height:30px;border-radius:7px;background:var(--brand-grad);
  display:grid;place-items:center;font-weight:800;font-size:16px;letter-spacing:-1px}
.logo-txt b{display:block;font-size:14px;line-height:1.2;letter-spacing:.5px}
.logo-txt span{display:block;font-size:10px;color:#9AA4B8;letter-spacing:1px}

.nav{display:flex;align-items:center;gap:2px;flex:1}
.nav a{display:flex;align-items:center;gap:3px;padding:0 12px;height:var(--header-h);
  font-size:13.5px;color:#D8DEEA;transition:color .15s,background .15s;white-space:nowrap}
.nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav a.on{color:#fff;box-shadow:inset 0 -2px 0 var(--brand)}
.nav .cv{width:12px;height:12px;opacity:.6}
.hd-r{display:flex;align-items:center;gap:14px;flex-shrink:0}
.hd-btn{display:flex;align-items:center;gap:6px;font-size:13px;color:#D8DEEA;padding:6px 10px;border-radius:var(--radius-s);transition:.15s}
.hd-btn:hover{color:#fff;background:rgba(255,255,255,.08)}
.hd-ava{width:26px;height:26px;border-radius:50%;background:var(--brand-grad);display:grid;place-items:center;font-size:11px;font-weight:700}
.burger{display:none;width:36px;height:36px;border-radius:var(--radius-s);place-items:center;color:#fff}
.burger:hover{background:rgba(255,255,255,.08)}

/* 移动端抽屉 */
.drawer{position:fixed;inset:0;z-index:200;display:none}
.drawer.open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(10,14,22,.5);animation:fade .2s}
.drawer-panel{position:absolute;top:0;left:0;bottom:0;width:78%;max-width:300px;background:var(--ink);
  padding:16px;overflow-y:auto;animation:slide .24s cubic-bezier(.2,.8,.2,1)}
@keyframes fade{from{opacity:0}}
@keyframes slide{from{transform:translateX(-100%)}}
.drawer-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.1)}
.drawer a{display:block;padding:12px 8px;color:#D8DEEA;font-size:14.5px;border-radius:var(--radius-s)}
.drawer a.on{color:#fff;background:rgba(255,255,255,.08)}

/* ============ Hero ============ */
.hero{background:linear-gradient(135deg,var(--hero-1) 0%,var(--hero-2) 60%,#1F2C40 100%);position:relative;overflow:hidden;
  height:auto;min-height:0;max-height:none}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 80% 100% at 50% 0%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 100% at 50% 0%,#000 40%,transparent 100%)}
.hero-in{position:relative;padding:calc(var(--nav-h) + 36px) 20px 44px;text-align:center}

/* 列表/详情页紧凑搜索条 */
.hero.slim .hero-in{padding:calc(var(--nav-h) + 20px) 20px 26px}
.hero.slim .search{margin-top:0;max-width:680px}
main.help-sub:has(> .hero.slim){padding-top:0}

/* 详情页右栏渐变求助卡 */
.card-help{background:linear-gradient(135deg,#FF4D2E,#FF8A3D);border:none;border-radius:var(--radius);padding:22px 18px 20px;color:#fff;text-align:center;position:relative;overflow:hidden}
.card-help::before,.card-help::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.14);pointer-events:none}
.card-help::before{width:96px;height:96px;right:-34px;top:-38px}
.card-help::after{width:120px;height:120px;left:-46px;bottom:-58px}
.card-help .ci{width:44px;height:44px;margin:0 auto 10px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.2);color:#fff;position:relative;z-index:1}
.card-help b{display:block;font-size:15px;font-weight:600;position:relative;z-index:1}
.card-help p{margin:4px 0 14px;font-size:12.5px;color:rgba(255,255,255,.88);line-height:1.6;position:relative;z-index:1}
.card-help .btn-w{display:block;background:#fff;color:var(--brand);border-radius:8px;padding:9px 0;font-size:13.5px;font-weight:600;position:relative;z-index:1;transition:transform .18s,box-shadow .18s}
.card-help .btn-w:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(140,20,0,.28)}
.hero h1{font-size:32px;color:#fff;letter-spacing:.5px}
.hero p{margin:10px 0 0;color:#A9B6C8;font-size:14px}
.hero-sm{display:flex;flex-direction:column;gap:8px;margin-top:22px}

/* 搜索框 */
.search{display:flex;align-items:center;gap:0;max-width:620px;margin:22px auto 0;background:#fff;
  border-radius:10px;padding:5px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.search-ic{flex:0 0 40px;display:grid;place-items:center;color:var(--text-3)}
.search input{flex:1;min-width:0;border:0;outline:0;padding:0 4px;height:36px;font-size:14px;background:transparent}
.search input::placeholder{color:var(--text-3)}
.search button{flex:0 0 auto;height:36px;padding:0 24px;border-radius:7px;background:var(--brand-grad);
  color:#fff;font-size:14px;font-weight:600;transition:filter .15s,transform .15s}
.search button:hover{filter:brightness(1.06)}
.search button:active{transform:scale(.98)}
.hot-kw{margin-top:14px;font-size:12.5px;color:#8E9DB1;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center}
.hot-kw a{padding:3px 10px;border:1px solid rgba(255,255,255,.18);border-radius:20px;color:#C2CDDC;transition:.15s}
.hot-kw a:hover{border-color:var(--brand);color:#fff;background:rgba(232,52,28,.25)}

/* ============ 通用区块 ============ */
.sec{padding:38px 0}
.sec-hd{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}
.sec-hd h2{font-size:19px;display:flex;align-items:center;gap:9px}
.sec-hd h2::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--brand-grad)}
.sec-hd .more{font-size:13px;color:var(--text-2)}
.sec-hd .more:hover{color:var(--brand)}

/* 快捷入口 */
.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:-30px;position:relative;z-index:2}
.qcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  display:flex;align-items:center;gap:13px;box-shadow:var(--shadow-1);transition:.2s}
.qcard:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#FFD9CF}
.qcard .qi{width:40px;height:40px;flex:0 0 40px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#FFF1ED,#FFE4D8);color:var(--brand)}
.qcard b{display:block;font-size:14.5px}
.qcard span{display:block;font-size:12px;color:var(--text-3)}

/* 分类网格 */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.cat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 16px;transition:.2s;position:relative;overflow:hidden}
.cat:hover{border-color:#FFCFC2;box-shadow:var(--shadow-2);transform:translateY(-2px)}
.cat .cat-ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;margin-bottom:12px;
  background:linear-gradient(135deg,#F3F7FF,#E6EEFF);color:var(--info);transition:.2s}
.cat:hover .cat-ic{background:var(--brand-grad);color:#fff}
.cat h3{font-size:15px;margin-bottom:6px}
.cat p{margin:0;font-size:12.5px;color:var(--text-3);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cat ul{margin-top:11px;padding-top:11px;border-top:1px dashed var(--line)}
.cat li{font-size:12.5px;color:var(--text-2);padding:2.5px 0;display:flex;align-items:center;gap:6px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cat li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--text-3);flex:0 0 4px}
.cat li:hover{color:var(--brand)}
.cat .cnt{position:absolute;top:16px;right:16px;font-size:12px;color:var(--text-3);background:var(--line-2);
  padding:2px 8px;border-radius:20px}

/* 热门文章 */
.hot{display:grid;grid-template-columns:1fr 1fr;gap:0 32px}
.hot li{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--line-2)}
.hot .rk{flex:0 0 20px;height:20px;border-radius:5px;background:var(--line-2);color:var(--text-3);
  font-size:11.5px;font-weight:700;display:grid;place-items:center;margin-top:2px}
.hot li:nth-child(-n+3) .rk{background:var(--brand-grad);color:#fff}
.hot a{font-size:14px;line-height:1.6;transition:color .15s;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.hot a:hover{color:var(--brand)}
.hot .meta{font-size:12px;color:var(--text-3);margin-top:2px}

/* 服务渠道 */
.channels{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ch{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px;text-align:center;transition:.2s}
.ch:hover{border-color:#FFCFC2;box-shadow:var(--shadow-1)}
.ch .ci{width:46px;height:46px;margin:0 auto 12px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,#FFF1ED,#FFE0D3);color:var(--brand)}
.ch b{display:block;font-size:14.5px;margin-bottom:3px}
.ch span{display:block;font-size:12.5px;color:var(--text-3);line-height:1.6}
.ch .cta{margin-top:11px;display:inline-block;font-size:13px;color:var(--brand);font-weight:600}
.ch .cta:hover{text-decoration:underline}

/* ============ 面包屑 ============ */
.crumb{padding:14px 0;font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.5}
.crumb b{color:var(--text);font-weight:500}

/* ============ 列表页 ============ */
.ls{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:start;padding-bottom:48px}

.side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px;position:sticky;top:calc(var(--header-h) + 16px)}
.side-t{font-size:12px;color:var(--text-3);padding:10px 12px 6px;letter-spacing:.5px}
.side a{display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:var(--radius-s);
  font-size:13.5px;color:var(--text-2);transition:.15s}
.side a:hover{background:var(--line-2);color:var(--text)}
.side a.on{background:linear-gradient(135deg,#FFF1ED,#FFE6DB);color:var(--brand);font-weight:600}
.side a .n{margin-left:auto;font-size:11.5px;color:var(--text-3);font-weight:400}
.side a.on .n{color:var(--brand);opacity:.75}
.side a svg{flex:0 0 16px;opacity:.85}

.ls-head{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:14px}
.ls-head h1{margin:0 0 6px;font-size:22px;display:flex;align-items:center;gap:10px}
.ls-head h1 .ic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:var(--brand-grad);color:#fff;flex:0 0 34px}
.ls-head p{margin:0;font-size:13.5px;color:var(--text-2)}
.ls-head .tags{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.ls-head .tags a{font-size:12.5px;padding:3px 10px;border:1px solid var(--line);border-radius:20px;color:var(--text-2);transition:.15s}
.ls-head .tags a:hover{border-color:var(--brand);color:var(--brand);background:#FFF6F4}

/* 移动端分类 tab */
.tabbar{display:none;position:sticky;top:var(--header-h);z-index:60;background:#fff;
  border-bottom:1px solid var(--line);overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.tabbar::-webkit-scrollbar{display:none}
.tabbar-in{display:flex;gap:6px;padding:10px 16px;width:max-content}
.tabbar a{flex:0 0 auto;padding:6px 14px;border-radius:20px;background:var(--line-2);
  font-size:13.5px;color:var(--text-2);white-space:nowrap;transition:.15s}
.tabbar a.on{background:var(--brand-grad);color:#fff;font-weight:600}

/* 文章卡片列表 */
.list{display:flex;flex-direction:column;gap:10px}
.art{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;transition:.18s}
.art:hover{border-color:#FFCFC2;box-shadow:var(--shadow-2);transform:translateX(2px)}
.art h3{font-size:15.5px;margin-bottom:7px;transition:color .15s}
.art:hover h3{color:var(--brand)}
.art p{margin:0;font-size:13px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art .meta{display:flex;align-items:center;gap:14px;margin-top:11px;font-size:12px;color:var(--text-3);flex-wrap:wrap}
.art .meta span{display:flex;align-items:center;gap:4px}
.art .tag{background:var(--line-2);padding:1px 8px;border-radius:4px;color:var(--text-2)}

.pager{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:24px;flex-wrap:wrap}
.pager a,.pager span{min-width:34px;height:34px;padding:0 10px;border-radius:var(--radius-s);
  border:1px solid var(--line);background:#fff;display:grid;place-items:center;font-size:13px;color:var(--text-2);transition:.15s}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager .on{background:var(--brand-grad);color:#fff;border-color:transparent;font-weight:600}
.pager .dis{opacity:.45;cursor:not-allowed}

/* 求助卡 */
.helpcard{margin-top:20px;background:linear-gradient(135deg,#FFF7F5,#FFF1EC);border:1px solid #FFDCD2;
  border-radius:var(--radius);padding:18px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.helpcard b{font-size:14.5px}
.helpcard p{margin:2px 0 0;font-size:13px;color:var(--text-2)}
.helpcard .btn{margin-left:auto}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 18px;
  border-radius:var(--radius-s);font-size:14px;font-weight:600;transition:.15s;white-space:nowrap}
.btn-p{background:var(--brand-grad);color:#fff}
.btn-p:hover{filter:brightness(1.06);box-shadow:0 4px 12px rgba(232,52,28,.28)}
.btn-o{border:1px solid var(--line);background:#fff;color:var(--text-2)}
.btn-o:hover{border-color:var(--brand);color:var(--brand)}

/* ============ 详情页 ============ */
.dt{display:grid;grid-template-columns:1fr 260px;gap:28px;align-items:start;padding-bottom:48px}
.doc{background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);padding:32px 36px 36px}
.doc h1{font-size:26px;line-height:1.4;margin-bottom:14px}
.doc-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:18px;
  border-bottom:1px solid var(--line);font-size:12.5px;color:var(--text-3)}
.doc-meta span{display:flex;align-items:center;gap:5px}
.doc-meta .tag{background:#FFF1ED;color:var(--brand);padding:2px 9px;border-radius:4px;font-weight:600}

.doc-body{padding-top:24px;font-size:15px;line-height:1.85;color:#2B3242}
.doc-body h2{font-size:19px;margin:34px 0 14px;padding-left:11px;border-left:3px solid var(--brand)}
.doc-body h3{font-size:16px;margin:26px 0 10px}
.doc-body p{margin:0 0 14px}
.doc-body ul,.doc-body ol{margin:0 0 16px;padding-left:22px}
.doc-body ul li{list-style:disc;margin-bottom:7px}
.doc-body ol li{list-style:decimal;margin-bottom:7px}
.doc-body strong{color:var(--text);font-weight:600}
.doc-body a{color:var(--brand);text-decoration:underline;text-underline-offset:2px}
.doc-body code{background:var(--line-2);padding:2px 6px;border-radius:4px;font-size:13px;
  font-family:ui-monospace,Consolas,Monaco,monospace;color:#C7254E}
.doc-body pre{background:#151B2B;color:#D8DEEA;padding:16px 18px;border-radius:var(--radius);
  overflow-x:auto;font-size:13px;line-height:1.7;font-family:ui-monospace,Consolas,Monaco,monospace}
.doc-body pre code{background:none;color:inherit;padding:0}
.doc-body img{border-radius:var(--radius);border:1px solid var(--line);margin:8px 0 16px}
.tip{border-radius:var(--radius);padding:14px 16px;margin:0 0 16px;font-size:14px;display:flex;gap:10px}
.tip svg{flex:0 0 18px;margin-top:2px}
.tip p{margin:0}
.tip-info{background:#EFF5FF;border:1px solid #CFE0FF;color:#1E40AF}
.tip-warn{background:#FFF8E8;border:1px solid #FFE3A8;color:#8A5A00}
.tip-ok{background:#EDFAF2;border:1px solid #BDEBD0;color:#0A6B36}
.steps{counter-reset:s;margin:0 0 16px;padding-left:0}
.steps li{position:relative;padding-left:36px;margin-bottom:16px;list-style:none}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:1px;
  width:24px;height:24px;border-radius:50%;background:var(--brand-grad);color:#fff;
  font-size:12.5px;font-weight:700;display:grid;place-items:center}
.steps b{display:block;margin-bottom:2px}

/* 反馈 */
.fb{margin-top:32px;padding-top:24px;border-top:1px solid var(--line);text-align:center}
.fb p{margin:0 0 12px;font-size:14px;color:var(--text-2)}
.fb-btns{display:flex;gap:10px;justify-content:center}
.fb-btns button{display:flex;align-items:center;gap:6px;height:38px;padding:0 20px;border-radius:20px;
  border:1px solid var(--line);background:#fff;font-size:13.5px;color:var(--text-2);transition:.15s}
.fb-btns button:hover{border-color:var(--brand);color:var(--brand);background:#FFF6F4}
.fb-btns button.done{border-color:var(--success);color:var(--success);background:#EDFAF2}

.rel{margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}
.rel h4{font-size:15px;margin-bottom:12px}
.rel ul{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.rel a{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);
  padding:9px 12px;border:1px solid var(--line);border-radius:var(--radius-s);transition:.15s}
.rel a:hover{border-color:#FFCFC2;color:var(--brand);background:#FFF9F8}
.rel a svg{flex:0 0 14px;opacity:.6}

.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
.pn a{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;transition:.15s;background:#fff}
.pn a:hover{border-color:#FFCFC2;box-shadow:var(--shadow-1)}
.pn span{display:block;font-size:12px;color:var(--text-3);margin-bottom:3px}
.pn b{font-size:13.5px;font-weight:500;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.pn a:hover b{color:var(--brand)}
.pn .next{text-align:right}

/* 侧栏 */
.aside{position:sticky;top:calc(var(--header-h) + 16px);display:flex;flex-direction:column;gap:14px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.card-t{font-size:13px;font-weight:600;margin-bottom:10px;display:flex;align-items:center;gap:7px}
.card-t::before{content:"";width:3px;height:13px;border-radius:2px;background:var(--brand-grad)}
.toc{font-size:13.5px;max-height:calc(100vh - 220px);overflow-y:auto}
.toc a{display:block;padding:6px 10px;border-left:2px solid var(--line);color:var(--text-2);
  transition:.15s;line-height:1.6}
.toc a:hover{color:var(--brand);border-left-color:#FFC9BB}
.toc a.on{color:var(--brand);border-left-color:var(--brand);background:#FFF6F4;font-weight:600}
.toc a.lv3{padding-left:24px;font-size:12.5px}
.aside .ch{text-align:left;padding:16px;display:flex;gap:12px;align-items:center}
.aside .ch .ci{margin:0;flex:0 0 42px;width:42px;height:42px}
.aside .ch .cta{margin-top:6px}
.aside ul.hotmini li{padding:8px 0;border-bottom:1px solid var(--line-2);font-size:13.5px}
.aside ul.hotmini li:last-child{border:0;padding-bottom:0}
.aside ul.hotmini a:hover{color:var(--brand)}
.aside ul.hotmini a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 移动端 TOC 折叠 */
.toc-m{display:none}

/* ============ 页脚 ============ */
.ft{background:var(--ink);color:#8E9AAD;padding:34px 0 26px;font-size:13px;margin-top:20px}
.ft-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ft h4{color:#fff;font-size:14px;margin-bottom:12px}
.ft a{color:#8E9AAD;display:block;padding:3px 0}
.ft a:hover{color:#fff}
.ft-b{margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px}

/* 返回顶部 */
.totop{position:fixed;right:20px;bottom:24px;width:42px;height:42px;border-radius:50%;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-2);display:grid;place-items:center;color:var(--text-2);
  opacity:0;pointer-events:none;transition:.25s;z-index:90}
.totop.show{opacity:1;pointer-events:auto}
.totop:hover{color:var(--brand);border-color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .cats{grid-template-columns:repeat(3,1fr)}
  .quick,.channels{grid-template-columns:repeat(2,1fr)}
  .dt{grid-template-columns:1fr}
  .aside{position:static;flex-direction:row;flex-wrap:wrap}
  .aside .card{flex:1 1 260px}
}
@media (max-width:768px){
  .nav,.hd-r{display:none}
  .burger{display:grid}
  .hd-in{height:52px;--header-h:52px;justify-content:space-between}
  :root{--header-h:52px}
  .wrap{padding:0 16px}
  .hero-in{padding:calc(var(--nav-h) + 24px) 16px 34px}
  .hero.slim .hero-in{padding:calc(var(--nav-h) + 14px) 16px 20px}
  .hero h1{font-size:22px}
  .hero p{font-size:13px;display:none}
  .search{max-width:none}
  .search button{padding:0 16px}
  .hot-kw{font-size:12px}
  .quick{margin-top:-22px;grid-template-columns:1fr 1fr;gap:10px}
  .qcard{padding:13px;gap:10px}
  .qcard .qi{width:34px;height:34px;flex:0 0 34px}
  .qcard b{font-size:13.5px}
  .qcard span{font-size:11.5px}
  .cats{grid-template-columns:1fr 1fr;gap:10px}
  .cat{padding:14px}
  .cat .cat-ic{width:36px;height:36px;margin-bottom:9px}
  .cat h3{font-size:14px}
  .cat p,.cat .cnt{display:none}
  .cat ul{margin-top:9px;padding-top:9px}
  .cat li{font-size:12px}
  .hot{grid-template-columns:1fr}
  .sec{padding:28px 0}
  .sec-hd h2{font-size:17px}
  .ls{grid-template-columns:1fr;gap:0;padding-bottom:32px}
  .side{display:none}
  .tabbar{display:block}
  .ls-head{padding:16px;border-radius:0;border-left:0;border-right:0;margin-bottom:10px}
  .ls-head h1{font-size:18px}
  .art{padding:14px 16px;border-radius:var(--radius)}
  .art h3{font-size:15px}
  .art .meta{gap:10px;font-size:11.5px}
  .doc{padding:20px 18px 26px;border-radius:var(--radius)}
  .doc h1{font-size:20px}
  .doc-body{font-size:14.5px}
  .doc-body h2{font-size:17px;margin:26px 0 12px}
  .toc-m{display:block}
  .toc-m summary{cursor:pointer;font-size:13.5px;font-weight:600;padding:12px 16px;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);list-style:none;
    display:flex;align-items:center;justify-content:space-between}
  .toc-m summary::-webkit-details-marker{display:none}
  .toc-m[open] summary{border-radius:var(--radius) var(--radius) 0 0;border-bottom:0}
  .toc-m .toc{border:1px solid var(--line);border-top:1px solid var(--line);
    border-radius:0 0 var(--radius) var(--radius);padding:8px 4px;background:#fff;max-height:none}
  .aside .card-toc{display:none}
  .rel ul,.pn{grid-template-columns:1fr}
  .ft-in{flex-direction:column;gap:20px}
  .helpcard{padding:16px}
  .helpcard .btn{margin-left:0;width:100%}
  .totop{right:14px;bottom:16px}
}
@media (max-width:400px){
  .quick,.cats{grid-template-columns:1fr 1fr}
  .cat li{display:none}
  .cat ul{display:none}
}

/* ---------- 站点统一头部为 72px，吸顶元素对齐 ---------- */
.tabbar{top:var(--nav-h)}
.side{top:calc(var(--nav-h) + 16px)}
.help-sub{padding-top:var(--nav-h)}

/* ---------- 动态富文本正文适配 ---------- */
.doc-body img{max-width:100%;height:auto;border-radius:var(--radius-s)}
.doc-body table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13.5px}
.doc-body th,.doc-body td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.doc-body th{background:var(--line-2)}
.doc-body iframe,.doc-body video{max-width:100%}
.doc-body a{color:var(--brand)}

/* ============ 代码块（One Dark 深色主题：行号 + 语言标签 + 复制按钮） ============ */
/* Prism 由 site/vendor/prism/prism.min.js 提供（manual 模式，help.js 定向高亮）。
   主题色不引官方 css，直接在这里写 One Dark 配色，便于与站点风格统一。 */
.doc-body pre[class*="language-"],.doc-body pre.code-plain{
  position:relative;
  background:#282c34;color:#abb2bf;
  border-radius:10px;
  padding:46px 18px 16px;
  margin:20px 0;
  overflow-x:auto;
  font-size:13px;line-height:1.7;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Monaco,monospace;
  box-shadow:0 2px 10px rgba(15,23,42,.08);
}
.doc-body pre[class*="language-"] code,.doc-body pre.code-plain code{
  background:none;color:inherit;padding:0;font-size:inherit;text-shadow:none;white-space:pre
}
/* 左上角语言标签 */
.doc-body pre[data-lang]::before{
  content:attr(data-lang);
  position:absolute;top:12px;left:16px;
  font-size:11px;font-weight:500;letter-spacing:.6px;
  color:#8b95a8;background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.08);
  padding:2px 9px;border-radius:5px;
  font-family:ui-monospace,Consolas,Monaco,monospace;
  pointer-events:none;
}
/* 右上角复制按钮：悬停浮现 */
.doc-body .code-copy{
  position:absolute;top:9px;right:10px;
  opacity:0;transform:translateY(-2px);
  transition:opacity .18s ease,transform .18s ease,background .18s ease,color .18s ease;
  background:rgba(255,255,255,.08);color:#abb2bf;
  border:1px solid rgba(255,255,255,.14);
  padding:4px 12px;border-radius:6px;
  font-size:12px;line-height:1.4;cursor:pointer;
  font-family:inherit;user-select:none;
}
.doc-body pre:hover .code-copy,.doc-body .code-copy:focus-visible{opacity:1;transform:translateY(0)}
.doc-body .code-copy:hover{background:rgba(255,255,255,.16);color:#fff}
.doc-body .code-copy.done{background:rgba(103,191,111,.18);border-color:rgba(103,191,111,.4);color:#7ee787;opacity:1}

/* 行号列（覆盖 prism-line-numbers 插件默认样式，融入 One Dark） */
.doc-body pre[class*="language-"].line-numbers{padding-left:56px}
.doc-body pre[class*="language-"] .line-numbers-rows{
  border-right:1px solid rgba(255,255,255,.09);
  color:#4e5a6e;font-size:12.5px;top:2px;
}
.doc-body pre[class*="language-"] code{padding-left:0}

/* One Dark token 配色 */
.doc-body .token.comment,.doc-body .token.prolog,.doc-body .token.doctype,.doc-body .token.cdata{color:#5c6370;font-style:italic}
.doc-body .token.punctuation{color:#abb2bf}
.doc-body .token.selector,.doc-body .token.tag{color:#e06c75}
.doc-body .token.property,.doc-body .token.attr-name{color:#d19a66}
.doc-body .token.string,.doc-body .token.char,.doc-body .token.attr-value,.doc-body .token.inserted{color:#98c379}
.doc-body .token.number,.doc-body .token.boolean,.doc-body .token.constant,.doc-body .token.symbol{color:#d19a66}
.doc-body .token.keyword{color:#c678dd}
.doc-body .token.function,.doc-body .token.class-name{color:#61afef}
.doc-body .token.operator,.doc-body .token.entity,.doc-body .token.url{color:#56b6c2;background:none}
.doc-body .token.variable{color:#e06c75}
.doc-body .token.builtin{color:#e5c07b}
.doc-body .token.regex,.doc-body .token.important{color:#98c379}
.doc-body .token.deleted{color:#e06c75}
.doc-body .token.bold{font-weight:600}
.doc-body .token.italic{font-style:italic}
.doc-body .token.namespace{opacity:.7}

@media (max-width:767px){
  .doc-body pre[class*="language-"],.doc-body pre.code-plain{padding:42px 12px 12px;font-size:12px;border-radius:8px}
  .doc-body pre[class*="language-"].line-numbers{padding-left:46px}
  .doc-body .code-copy{opacity:1;transform:none}
}