/* ============================================================
   职场AI三千问 · 千问办公 学习站  —  纸感暖灰主题
   ============================================================ */
:root{
  --ink:#18181b; --text:#494641; --muted:#77736c; --subtle:#a19d96;
  --line:#e6e2da; --line-strong:#d0cdc7; --paper:#ffffff; --paper-warm:#fafaf8;
  --sidebar:#fafaf9;
  --green:#47c77a; --green-strong:#24774d; --green-ink:#206944;
  --green-soft:rgba(71,199,122,.12);
  --shadow-float:0 12px 32px rgba(24,24,27,.08);
  --ease:cubic-bezier(.16,1,.3,1);
  --sky-deep:#0a2a55;
  --header-h:56px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper); color:var(--text);
  font-family:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',-apple-system,sans-serif;
  letter-spacing:-.006em; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ---------- header ---------- */
.hdr{
  position:sticky; top:0; z-index:50; height:var(--header-h);
  display:flex; align-items:center; gap:28px; padding:0 22px;
  background:rgba(252,252,252,.9); backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.hdr-brand{display:flex;align-items:center;gap:11px;white-space:nowrap}
.hdr-brand img{height:26px;display:block}
.hdr-brand .sep{width:1px;height:17px;background:var(--line-strong)}
.hdr-brand .sub{font-size:13px;font-weight:500;color:var(--muted)}
.hdr-nav{display:flex;align-items:center;gap:4px;height:100%}
.hdr-nav a{
  display:flex;align-items:center;height:100%;padding:0 15px;
  font-size:14.5px;font-weight:560;color:var(--text);
  border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.hdr-nav a:hover{color:var(--ink)}
.hdr-nav a.active{color:var(--green-strong);border-bottom-color:var(--green)}
.hdr-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.hdr-right a.site{font-size:14px;font-weight:560;color:var(--green-ink)}
.hdr-right a.site:hover{color:var(--green-strong)}
.hdr-burger{display:none;width:34px;height:34px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;cursor:pointer;align-items:center;justify-content:center}
.hdr-burger span,.hdr-burger span::before,.hdr-burger span::after{content:'';display:block;width:16px;height:1.7px;background:var(--ink);position:relative;transition:.2s}
.hdr-burger span::before{position:absolute;top:-5px}
.hdr-burger span::after{position:absolute;top:5px}

/* ---------- header dropdown / mega menu ---------- */
.hdr-item{position:relative;height:100%;display:flex;align-items:center}
.hdr-item>a{display:flex;align-items:center;gap:5px;height:100%;padding:0 15px;
  font-size:14.5px;font-weight:560;color:var(--text);border-bottom:2px solid transparent;
  transition:color .2s,border-color .2s}
.hdr-item>a:hover{color:var(--ink)}
.hdr-item>a.active{color:var(--green-strong);border-bottom-color:var(--green)}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.55;transition:transform .2s,opacity .2s}
.hdr-item:hover .caret,.hdr-item:focus-within .caret{transform:rotate(180deg);opacity:.9}
.hdr-menu{position:absolute;top:calc(100% + 1px);left:0;z-index:60;
  background:rgba(252,252,252,.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-float);
  padding:10px;min-width:200px;opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s}
.hdr-item:hover .hdr-menu,.hdr-item:focus-within .hdr-menu{opacity:1;visibility:visible;transform:none}
.hdr-menu a{display:block;padding:9px 12px;border-radius:8px;font-size:13.5px;font-weight:520;
  color:var(--text);white-space:nowrap;height:auto;border:none;transition:background .18s,color .18s}
.hdr-menu a:hover{background:#eef4ef;color:var(--green-ink)}
.hdr-menu.mega{left:50%;transform:translateX(-50%) translateY(6px);
  display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:8px 4px;padding:16px}
.hdr-item:hover .hdr-menu.mega,.hdr-item:focus-within .hdr-menu.mega{transform:translateX(-50%)}
.hcol-h{display:flex;align-items:center;gap:7px;padding:6px 12px 8px;font-size:12px;font-weight:700;
  color:var(--muted);letter-spacing:.02em}
.hcol-h .dot{width:6px;height:6px;border-radius:2px;background:var(--green);flex:none}

/* ============================================================
   子页面菜单栏（solid 变体）——与首页透明菜单栏结构一致，实心可读
   ============================================================ */
.menubar.solid{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:36px;
  height:56px;padding:0 28px;background:rgba(252,252,252,.9);backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.menubar.solid .brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:700;
  color:var(--ink);text-decoration:none;white-space:nowrap}
.menubar.solid .brand img{height:1.49em;display:block}
.menubar.solid .brand .sep{width:1px;height:1.1em;background:var(--line-strong)}
.menubar.solid .nav{display:flex;align-items:center;gap:6px;height:100%}
.menubar.solid .nav-item{position:relative;height:100%;display:flex;align-items:center}
.menubar.solid .nav-link{display:flex;align-items:center;gap:5px;padding:7px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--text);text-decoration:none;white-space:nowrap;
  transition:background .2s,color .2s}
.menubar.solid .nav-item:hover>.nav-link{background:#eef4ef;color:var(--green-ink)}
.menubar.solid .nav-link.active{color:var(--green-strong);font-weight:700}
.menubar.solid .nav-caret{width:7px;height:7px;border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.menubar.solid .nav-item:hover .nav-caret{transform:rotate(225deg) translateY(-1px)}
.menubar.solid .dropdown{position:absolute;top:calc(100% - 6px);left:0;min-width:148px;padding:8px;
  background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-float);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s,transform .18s,visibility .18s}
.menubar.solid .nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.menubar.solid .dropdown a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;
  color:var(--ink);text-decoration:none;white-space:nowrap}
.menubar.solid .dropdown a:hover{background:var(--green-soft);color:var(--green-ink)}
/* 课程内容为单层入口：全站不展示课程子菜单。 */
.nav-link[href$="courses/index.html"] .nav-caret,
.nav-link[href$="courses/index.html"] + .dropdown{display:none!important}
.lang-switch{margin-left:auto;flex:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;
  min-width:64px;height:34px;padding:0 12px;border:1px solid rgba(6,40,26,.14);border-radius:999px;
  background:rgba(255,255,255,.9);color:var(--green-ink);font:inherit;font-size:13px;font-weight:700;
  text-decoration:none;box-shadow:0 4px 14px rgba(6,40,26,.08);transition:background .2s,border-color .2s,transform .2s}
.lang-switch:hover{background:#ecf9f0;border-color:rgba(22,122,67,.28);transform:translateY(-1px)}
.lang-switch:focus-visible{outline:2px solid var(--green);outline-offset:2px}
.lang-switch svg{width:15px;height:15px;flex:none}
.menubar:not(.solid) .lang-switch{background:rgba(5,28,20,.28);border-color:rgba(255,255,255,.42);color:#fff;
  box-shadow:0 4px 16px rgba(0,0,0,.12);backdrop-filter:blur(10px)}
.menubar:not(.solid) .lang-switch:hover{background:rgba(5,28,20,.44);border-color:rgba(255,255,255,.65)}
@media(max-width:720px){.lang-switch{position:sticky;right:8px;min-width:58px;padding:0 10px}}
@media(max-width:720px){.menubar.solid{gap:14px;padding:0 14px;overflow-x:auto}.menubar.solid .brand{font-size:15px}}

/* ============================================================
   HOME  —  hero banner (octopus mascot follows cursor)
   ============================================================ */
.hero-sky{position:relative;height:37.5svh;min-height:230px;overflow:hidden;background:var(--sky-deep)}
.bg-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none}
.cloud-fade{position:absolute;left:-4%;right:-4%;bottom:-1px;height:26%;z-index:3;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.45) 55%,rgba(255,255,255,.92) 85%,#fff 100%)}
.cloud-fade::after{content:"";position:absolute;left:0;right:0;bottom:0;height:20%;background:#fff}
.hero-cap{position:absolute;z-index:4;left:0;right:0;bottom:22px;text-align:center;pointer-events:none;padding:0 16px}
.hero-cap h1{font-size:clamp(20px,3.4vw,32px);font-weight:760;letter-spacing:-.03em;color:#fff;text-shadow:0 2px 12px rgba(6,24,50,.5)}
.hero-cap p{margin-top:6px;font-size:clamp(12px,1.6vw,15px);color:rgba(255,255,255,.92);text-shadow:0 1px 8px rgba(6,24,50,.5)}

/* ---------- home content ---------- */
.home{max-width:1120px;margin:0 auto;padding:34px 22px 80px}
.home-sec{margin-top:52px}
.home-sec:first-child{margin-top:8px}
.sec-title{display:flex;align-items:baseline;gap:10px;font-size:21px;font-weight:730;letter-spacing:-.02em;color:var(--ink)}
.sec-stage{font-size:13px;font-weight:650;color:var(--green-strong);background:#ecf9f0;border:1px solid #cfe9da;border-radius:6px;padding:3px 9px;transform:translateY(-2px)}
.sec-stage::after{content:'｜';margin-left:9px;color:#cfe9da}
.sec-sub{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7;max-width:760px}

.grid2{margin-top:20px;display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
.grid3{margin-top:20px;display:grid;gap:16px;grid-template-columns:repeat(3,1fr)}
.grid5{margin-top:20px;display:grid;gap:14px;grid-template-columns:repeat(5,1fr)}

/* green bar + panel (知识库分组) */
.gbar{display:flex;align-items:center;gap:9px;background:#ecf9f0;border-radius:10px;padding:12px 16px;font-size:14.5px;font-weight:650;color:var(--ink);transition:background .25s var(--ease)}
a.gbar:hover{background:#dff3e6}
.gbar-sq{width:8px;height:8px;border-radius:2px;background:var(--green);flex:none}
.gbar-arrow{margin-left:auto;color:var(--green-strong);font-size:13px;opacity:0;transform:translateX(-4px);transition:opacity .25s var(--ease),transform .25s var(--ease)}
a:hover>.gbar-arrow,.rowlink:hover .gbar-arrow,.tile:hover .gbar-arrow{opacity:1;transform:translateX(0)}
.panel{margin-top:8px;background:#fff;border:1px solid #9fd3c4;border-radius:10px;padding:8px}
.rowlink{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;font-size:14px;font-weight:560;color:var(--text);transition:background .2s}
.rowlink:hover{background:#f2faf5;color:var(--green-ink)}
.rowlink-doc{width:15px;height:17px;flex:none;border:1.5px solid #4dab9a;border-radius:3px;position:relative}
.rowlink-doc::after{content:'';position:absolute;left:2.5px;right:2.5px;top:3.5px;height:1.5px;background:#4dab9a;box-shadow:0 3.5px 0 #4dab9a,0 7px 0 #4dab9a}

/* tiles (artCard) */
.tile{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease)}
.tile:hover{transform:translateY(-3px);border-color:#9fd3c4;box-shadow:var(--shadow-float)}
.tile-cover{position:relative;height:118px;overflow:hidden;background:#eef5f1}
.tile-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.tile:hover .tile-cover img{transform:scale(1.05)}
.tile-cover-sm{height:auto;aspect-ratio:16/9}
.tile-title{display:flex;align-items:center;gap:8px;padding:12px 15px;font-size:14px;font-weight:620;color:var(--ink)}

/* wide media card */
.wide{display:flex;align-items:center;gap:22px;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;padding-right:22px;margin-top:20px;transition:border-color .25s,box-shadow .25s}
.wide:hover{border-color:#9fd3c4;box-shadow:var(--shadow-float)}
.wide-cover{position:relative;width:340px;aspect-ratio:16/9;flex-shrink:0;background:#eef5f1}
.wide-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.wide-body{flex:1;display:flex;flex-direction:column;gap:6px;padding:20px 0}
.wide-title{font-size:16px;font-weight:600;color:#2f2d29}
.wide-desc{font-size:13.5px;color:#77736c}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--ink);font-size:14px;font-weight:560;border:1px solid var(--line-strong);border-radius:10px;padding:10px 18px;flex-shrink:0;transition:border-color .25s,transform .25s}
.btn-ghost:hover{border-color:var(--green);transform:translateY(-1px)}
.badge-soon{display:inline-block;font-size:11px;font-weight:650;color:#b26a00;background:#fff5e6;border:1px solid #f4d9a8;border-radius:999px;padding:2px 8px;margin-left:8px;transform:translateY(-2px)}

.fade-up{opacity:0;transform:translateY(18px);animation:fadeUp .8s var(--ease) forwards}
@keyframes fadeUp{to{opacity:1;transform:none}}

/* ============================================================
   HOME v2  —  精选视频 + 热门文章 TOP5 双栏
   ============================================================ */
.home-top{margin-top:6px;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;align-items:stretch}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.card-head{display:flex;align-items:center;gap:9px;padding:16px 20px;font-size:15px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}
.card-head .hbar{width:4px;height:16px;border-radius:2px;background:var(--green);flex:none}
.card-head .more{margin-left:auto;font-size:12.5px;font-weight:560;color:var(--muted)}
.card-head a.more:hover{color:var(--green-ink)}

/* 精选视频：左播放器 + 右播放列表 */
.feat{display:grid;grid-template-columns:minmax(0,1fr) 216px;min-height:300px}
.feat-player{position:relative;background:#1c1c1e;display:flex;align-items:center;justify-content:center;overflow:hidden}
.feat-player video{width:100%;height:100%;object-fit:cover;display:block}
.feat-skel{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:16px 18px;
  background:linear-gradient(180deg,#2a2a2e 0%,#161618 100%)}
.feat-skel .play{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);width:56px;height:56px;border-radius:50%;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center}
.feat-skel .play::after{content:'';margin-left:4px;border-left:15px solid rgba(255,255,255,.85);border-top:9px solid transparent;border-bottom:9px solid transparent}
.feat-skel .bar{display:flex;align-items:center;gap:10px;color:rgba(255,255,255,.7);font-size:11px}
.feat-skel .track{flex:1;height:3px;border-radius:3px;background:rgba(255,255,255,.2)}
.feat-list{border-left:1px solid var(--line);padding:8px;display:flex;flex-direction:column;gap:2px;background:#fff}
.feat-row{display:flex;align-items:center;gap:10px;padding:12px 12px;border-radius:9px;font-size:13.5px;font-weight:540;color:var(--text);cursor:default;transition:background .18s}
.feat-row .fdot{width:6px;height:6px;border-radius:50%;background:var(--line-strong);flex:none}
.feat-row.on{background:#ecf9f0;color:var(--green-strong);font-weight:650}
.feat-row.on .fdot{background:var(--green)}

/* 热门文章 TOP5 */
.rank{padding:8px 10px 12px;display:flex;flex-direction:column}
.rank-row{display:flex;align-items:center;gap:13px;padding:11px 12px;border-radius:10px;transition:background .18s}
.rank-row:hover{background:#f2faf5}
.rank-no{flex:none;width:24px;height:24px;border-radius:7px;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:750;color:#fff;background:var(--line-strong)}
.rank-row:nth-child(1) .rank-no{background:#f5a623}
.rank-row:nth-child(2) .rank-no{background:#9aa4ad}
.rank-row:nth-child(3) .rank-no{background:#d0742f}
.rank-row:nth-child(n+4) .rank-no{background:#eef1ee;color:var(--subtle)}
.rank-body{min-width:0}
.rank-title{font-size:14px;font-weight:580;color:var(--ink);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-row:hover .rank-title{color:var(--green-ink)}
.rank-meta{font-size:11.5px;color:var(--subtle);margin-top:2px}

/* 三大板块 section title + 板块内内容沿用 grid2/grid3/grid5/tile/gbar/panel/wide */
.home-sec .sec-block{margin-top:26px}
.home-sec .sec-block:first-of-type{margin-top:20px}
.block-sub{margin:22px 0 4px;font-size:14.5px;font-weight:680;color:var(--ink);display:flex;align-items:center;gap:8px}
.block-sub .sdot{width:7px;height:7px;border-radius:2px;background:var(--green);flex:none}

@media(max-width:900px){
  .home-top{grid-template-columns:minmax(0,1fr)}
  .feat{grid-template-columns:minmax(0,1fr)}
  .feat-list{border-left:none;border-top:1px solid var(--line);flex-direction:row;overflow-x:auto}
  .feat-row{white-space:nowrap}
}

/* ============================================================
   DOC / PLACEHOLDER  —  sidebar layout
   ============================================================ */
.shell{display:grid;grid-template-columns:262px minmax(0,1fr);align-items:start;max-width:1400px;margin:0 auto}
.side{position:sticky;top:var(--header-h);height:calc(100svh - var(--header-h));overflow-y:auto;background:var(--sidebar);padding:22px 14px 40px}
.side-group{margin-bottom:8px}
.side-glabel{display:flex;align-items:center;gap:8px;padding:8px 10px;font-size:12.5px;font-weight:700;color:var(--muted);letter-spacing:.02em;text-transform:none}
.side-glabel .dot{width:6px;height:6px;border-radius:2px;background:var(--green);flex:none}
.side-link{display:block;padding:7px 12px 7px 24px;border-radius:8px;font-size:13.5px;font-weight:500;color:var(--text);transition:background .18s,color .18s}
.side-link:hover{background:#eef4ef;color:var(--green-ink)}
.side-link.active{background:#ecf9f0;color:var(--green-strong);font-weight:650}
.side-scrim{display:none}

.doc-wrap{display:grid;grid-template-columns:minmax(0,1fr) 208px;gap:40px;padding:34px 44px 90px;max-width:1180px}
.doc-main{min-width:0}
.doc-banner{display:block;width:100%;aspect-ratio:4/1;object-fit:cover;border-radius:16px;margin-bottom:22px;border:1px solid var(--line)}
.crumb{font-size:12.5px;color:var(--subtle);margin-bottom:14px}
.crumb a:hover{color:var(--green-ink)}
.doc-title{font-size:30px;font-weight:760;letter-spacing:-.03em;color:var(--ink);line-height:1.25;margin-bottom:8px}
.doc-lead{font-size:15px;color:var(--muted);line-height:1.75;margin-bottom:8px}
.doc-toc{position:sticky;top:calc(var(--header-h) + 28px);align-self:start;height:fit-content;max-height:calc(100svh - var(--header-h) - 60px);overflow-y:auto}
.doc-toc .toc-head{font-size:12px;font-weight:700;color:var(--subtle);letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px}
.doc-toc a{display:block;font-size:13px;line-height:1.5;color:var(--muted);padding:5px 0 5px 12px;border-left:2px solid var(--line);transition:color .18s,border-color .18s}
.doc-toc a.lv3{padding-left:24px}
.doc-toc a:hover{color:var(--green-ink);border-left-color:var(--green)}
.doc-toc a.active{color:var(--green-strong);border-left-color:var(--green);font-weight:600}

/* ---------- prose ---------- */
.prose{font-size:15px;line-height:1.85;color:var(--text)}
.prose h1,.prose h2,.prose h3,.prose h4{color:var(--ink);letter-spacing:-.02em;font-weight:700;scroll-margin-top:calc(var(--header-h) + 20px)}
.prose h1{font-size:23px;margin:2.4rem 0 1rem}
.prose h2{font-size:20px;margin:2.6rem 0 1rem;padding-bottom:.4em;border-bottom:1px solid var(--line)}
.prose h3{font-size:17px;margin:1.9rem 0 .7rem}
.prose h4{font-size:15.5px;margin:1.5rem 0 .6rem}
.prose p{margin:.9rem 0}
.prose ul,.prose ol{margin:.9rem 0;padding-left:1.4em}
.prose li{margin:.35rem 0}
.prose strong{color:var(--ink);font-weight:650}
.prose a{color:var(--green-ink);text-decoration:underline;text-decoration-color:rgba(32,105,68,.35);text-underline-offset:3px}
.prose a:hover{color:var(--green-strong);text-decoration-color:var(--green-strong)}
.prose hr{border:none;border-top:1px solid var(--line);margin:2rem 0}
.prose :not(pre)>code{background:#f6f5f3;border:1px solid #e1dfda;border-radius:4px;padding:2px 5px;font-size:.88em;color:#4a4640;font-family:'SFMono-Regular',Consolas,monospace}
.prose pre{background:#f7f7f5;border:1px solid var(--line);border-radius:12px;padding:16px 18px;overflow-x:auto;margin:1.2rem 0;font-size:13px;line-height:1.7}
.prose pre code{font-family:'SFMono-Regular',Consolas,monospace;color:#3a3833;filter:saturate(.5)}
.prose blockquote{border-left:3px solid var(--green);background:var(--paper-warm);padding:.6rem 1rem;margin:1.2rem 0;border-radius:0 8px 8px 0;color:var(--muted)}

/* 文档内嵌产品截图 */
.prose .doc-shot{margin:1.1rem 0}
.prose .doc-shot img{display:block;max-width:100%;height:auto;border:1px solid var(--line);border-radius:12px;box-shadow:0 6px 20px -12px rgba(24,60,40,.28)}

/* tables */
.prose .table-wrap{overflow-x:auto;margin:1.2rem 0;border:1px solid var(--line);border-radius:12px}
.prose table{width:100%;border-collapse:collapse;font-size:13.6px}
.prose th,.prose td{padding:10px 14px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);text-align:left;vertical-align:top}
.prose th:last-child,.prose td:last-child{border-right:none}
.prose tr:last-child td{border-bottom:none}
.prose th{background:var(--paper-warm);color:var(--ink);font-weight:650;white-space:nowrap}
.prose tbody tr:hover{background:#fbfbf9}

/* callout */
.callout{display:flex;gap:12px;background:#ecf9f0;border:1px solid #cfe9da;border-radius:12px;padding:14px 16px;margin:1.4rem 0}
.callout .ico{flex:none;width:22px;height:22px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.callout .ct{font-size:15px;line-height:1.7;color:var(--ink);font-weight:550}
.callout .ct strong{color:var(--green-strong)}

/* demo card (video/img dropped, keeps 示例提示词 + 做同款按钮) */
.demo{border:1px solid var(--line);border-radius:14px;background:var(--paper-warm);padding:16px 18px;margin:1.3rem 0}
.demo-head{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:650;color:var(--green-ink);margin-bottom:10px}
.demo-head .dico{width:18px;height:18px;border-radius:5px;background:#ecf9f0;border:1px solid #cfe9da;display:flex;align-items:center;justify-content:center;font-size:11px}
.demo-prompt{font-size:13.5px;line-height:1.7;color:var(--text);background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;white-space:pre-wrap;word-break:break-word}
.demo-note{font-size:12.5px;color:var(--subtle);margin-top:8px}
.prose a.demo-btn{display:inline-flex;align-items:center;gap:6px;margin-top:12px;background:var(--green-strong);color:#fff;font-size:13.5px;font-weight:600;border-radius:9px;padding:9px 16px;text-decoration:none;transition:background .2s,transform .2s}
.prose a.demo-btn:hover{background:#1a6640;transform:translateY(-1px);color:#fff}

/* qw-demo：知识库操作演示 + 可下载产物 */
.qw-demo{border:1px solid var(--line);border-radius:16px;background:#fff;margin:1.4rem 0;overflow:hidden}
.qw-demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:0}
.qw-demo-col{display:flex;flex-direction:column;min-width:0}
.qw-demo-col+.qw-demo-col{border-left:1px solid var(--line)}
.qw-demo-bar{height:58px;display:flex;align-items:center;justify-content:center;width:100%;font-size:17px;font-weight:750;
  color:var(--ink);background:linear-gradient(90deg,#edf9f1,#f4fbf6);border-bottom:1px solid #e4ece6}
.qw-demo-col:first-child>video,.qw-demo-col:first-child>img,.qw-demo-col:first-child>audio{
  width:calc(100% - 48px);height:auto;display:block;margin:24px;border:1px solid var(--line);border-radius:14px;background:#0c1622}
.qw-demo-col:first-child>audio{margin-top:auto;margin-bottom:auto;background:#fff}
.qw-demo-files{min-height:230px;margin:24px;padding:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;border:1.5px dashed #c8d0ca;border-radius:14px;background:#fff;text-align:center}
.prose a.qw-demo-file{display:inline-flex;align-items:center;justify-content:center;gap:8px;max-width:100%;font-size:15px;
  font-weight:650;color:var(--green-strong);background:transparent;border:0;padding:0;text-decoration:underline;
  text-decoration-color:#a8cbb6;text-underline-offset:4px;transition:color .2s;overflow-wrap:anywhere}
.prose a.qw-demo-file:hover{color:#165f3b;text-decoration-color:currentColor}
.prose a.qw-demo-file::before{content:'📄';flex:none;filter:saturate(.55)}
.prose a.qw-demo-btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:68px;margin:0;
  background:linear-gradient(90deg,#46dc83,#2dce70);color:#fff;font-size:18px;font-weight:750;border-radius:0;
  padding:14px 20px;text-decoration:none;transition:filter .2s,transform .2s}
.prose a.qw-demo-btn:hover{background:linear-gradient(90deg,#3fd77c,#28c96b);filter:saturate(1.05);color:#fff}
.prose a.qw-demo-btn:active{transform:translateY(1px)}
.prose a.qw-demo-btn[aria-disabled="true"]{background:#e8ece9;color:#77817a;cursor:not-allowed;pointer-events:none;filter:none}
.qw-demo-intro{margin:1.2rem 0}
.qw-demo-intro video{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:14px;background:#0c1622;box-shadow:0 8px 24px -14px rgba(24,60,40,.4)}
@media(max-width:720px){
  .qw-demo-grid{grid-template-columns:1fr}
  .qw-demo-col+.qw-demo-col{border-left:0;border-top:1px solid var(--line)}
  .qw-demo-bar{height:52px;font-size:15px}
  .qw-demo-col:first-child>video,.qw-demo-col:first-child>img,.qw-demo-col:first-child>audio{width:calc(100% - 32px);margin:16px}
  .qw-demo-files{min-height:150px;margin:16px;padding:22px}
  .prose a.qw-demo-btn{min-height:60px;font-size:16px}
}

/* placeholder skeleton */
.skel-hero{background:var(--paper-warm);border:1px dashed var(--line-strong);border-radius:16px;padding:40px 32px;text-align:center;margin-top:8px}
.skel-hero .st{font-size:20px;font-weight:720;color:var(--ink)}
.skel-hero .sd{margin-top:8px;font-size:14px;color:var(--muted)}
.skel-rows{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.skel-row{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff}
.skel-badge{flex:none;width:44px;height:44px;border-radius:10px;background:#ecf9f0;border:1px solid #cfe9da;display:flex;align-items:center;justify-content:center;font-size:18px}
.skel-body{flex:1;min-width:0}
.skel-line{height:11px;border-radius:6px;background:#edf1ee}
.skel-line.t{width:34%;margin-bottom:9px;height:13px;background:#e5ebe7}
.skel-line.m{width:64%}
.skel-tag{flex:none;font-size:11px;font-weight:650;color:#b26a00;background:#fff5e6;border:1px solid #f4d9a8;border-radius:999px;padding:3px 10px}

.foot{border-top:1px solid var(--line);padding:26px 22px;text-align:center;color:var(--subtle);font-size:12.5px}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .doc-wrap{grid-template-columns:minmax(0,1fr);padding:28px 28px 80px}
  .doc-toc{display:none}
}
@media(max-width:860px){
  .grid5{grid-template-columns:repeat(3,1fr)}
  .wide{flex-direction:column;align-items:stretch;gap:14px;padding-right:0;padding-bottom:18px}
  .wide-cover{width:100%;height:150px}
  .wide-body{padding:0 18px}
  .wide .btn-ghost{margin:0 18px}
}
@media(max-width:760px){
  .grid2,.grid3{grid-template-columns:1fr}
  .grid5{grid-template-columns:repeat(2,1fr)}
  body{padding-bottom:calc(66px + env(safe-area-inset-bottom))}
  .hero-sky{display:block;height:240px;min-height:240px}
  .hdr-burger{display:flex}
  .menubar,.menubar.solid{
    height:56px;min-height:56px;padding:0 14px;gap:10px;overflow:visible;
  }
  .menubar.solid{background:rgba(252,252,252,.98);backdrop-filter:none;-webkit-backdrop-filter:none}
  .menubar .brand,.menubar.solid .brand{min-width:0;gap:8px}
  .menubar .brand img,.menubar.solid .brand img{height:25px;max-width:116px;object-fit:contain}
  .menubar .brand .sep,.menubar.solid .brand .sep,
  .menubar .brand>span:last-child,.menubar.solid .brand>span:last-child{display:none}
  .menubar .nav,.menubar.solid .nav{
    position:fixed;left:0;right:0;bottom:0;z-index:90;height:calc(62px + env(safe-area-inset-bottom));
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;padding:0 6px env(safe-area-inset-bottom);
    background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(24,24,27,.06);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)
  }
  .menubar .nav-item,.menubar.solid .nav-item{height:62px;min-width:0;display:flex;align-items:stretch}
  .menubar .nav-link,.menubar.solid .nav-link{
    width:100%;height:100%;min-width:0;padding:8px 2px 7px;border-radius:0;justify-content:center;
    color:var(--muted);text-shadow:none;font-size:12px;font-weight:650;text-align:center;white-space:nowrap;
    border-top:2px solid transparent
  }
  .menubar .nav-link.active,.menubar.solid .nav-link.active{color:var(--green-strong);border-top-color:var(--green)}
  .menubar .nav-item:hover>.nav-link,.menubar.solid .nav-item:hover>.nav-link{background:transparent;color:var(--green-strong)}
  .menubar .nav-caret,.menubar .dropdown,.menubar.solid .nav-caret,.menubar.solid .dropdown{display:none!important}
  .lang-switch{position:static;margin-left:auto;right:auto;min-width:54px;height:32px;padding:0 9px;font-size:12px}
  /* 移动端：下拉导航改为竖排面板，点汉堡展开 */
  .hdr-nav{display:none;position:fixed;top:var(--header-h);left:0;right:0;z-index:45;
    flex-direction:column;align-items:stretch;height:auto;gap:0;padding:8px 10px 14px;
    background:rgba(252,252,252,.99);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);box-shadow:var(--shadow-float);max-height:calc(100svh - var(--header-h));overflow-y:auto}
  .hdr-nav.mobile-open{display:flex}
  .hdr-item{display:block;height:auto}
  .hdr-item>a{height:auto;padding:12px 12px;border-bottom:1px solid var(--line)}
  .hdr-menu,.hdr-menu.mega{position:static;opacity:1;visibility:visible;transform:none;
    display:none;box-shadow:none;border:none;border-radius:0;padding:4px 4px 8px;min-width:0;
    grid-template-columns:1fr;background:transparent}
  .hdr-item.mopen .hdr-menu,.hdr-item.mopen .hdr-menu.mega{display:block}
  .hdr-menu.mega{display:none}
  .hdr-item.mopen .hdr-menu.mega{display:grid;grid-template-columns:1fr 1fr}
  .caret{margin-left:auto}
  .shell{grid-template-columns:1fr}
  .side{position:fixed;top:var(--header-h);left:0;bottom:calc(62px + env(safe-area-inset-bottom));width:min(86vw,320px);height:auto;z-index:80;transform:translateX(-100%);transition:transform .25s var(--ease);border-right:1px solid var(--line)}
  .side.open{transform:none;box-shadow:var(--shadow-float)}
  .side-scrim.show{display:block;position:fixed;inset:var(--header-h) 0 calc(62px + env(safe-area-inset-bottom)) 0;background:rgba(0,0,0,.28);z-index:79}
  .doc-wrap{padding:22px 16px 54px}
  .doc-banner{border-radius:13px;margin-bottom:18px}
  .doc-title{font-size:27px;overflow-wrap:anywhere}
  .prose{font-size:15px;line-height:1.8}
  .prose h1{font-size:22px;margin:2rem 0 .85rem}
  .prose h2{font-size:19px;margin:2.2rem 0 .85rem}
  .prose .table-wrap{-webkit-overflow-scrolling:touch}
  .prose .table-wrap table{min-width:560px}
  .prose .table-wrap::after{content:'左右滑动查看完整表格';display:block;position:sticky;left:0;width:max-content;padding:6px 10px;font-size:11px;color:var(--subtle);background:var(--paper-warm)}
  .foot{padding-bottom:22px}
}

@media(max-width:420px){
  .menubar,.menubar.solid{padding-left:12px;padding-right:10px}
  .menubar .nav-link,.menubar.solid .nav-link{font-size:11.5px}
  .lang-switch{min-width:50px;padding:0 8px}
  .home{padding-left:14px;padding-right:14px}
}

@media(hover:none){
  .tile:hover,.wide:hover,.kb-card:hover,.live-card:hover{transform:none}
}