/* ============================================================
   图吧工具箱 · 全站样式（深色科技风）
   断点：1080 / 900 / 720 / 560
   ============================================================ */
:root{
  --bg:#070a12;
  --bg-soft:#0a0f1c;
  --panel:#0d1424;
  --panel-2:#111a2e;
  --line:rgba(148,163,184,.14);
  --line-strong:rgba(148,163,184,.28);
  --txt:#e8edf7;
  --txt-dim:#a3b3ca;
  --txt-mute:#6b7c96;
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --violet:#8b5cf6;
  --green:#4ade80;
  --amber:#fbbf24;
  --red:#f87171;
  --grad:linear-gradient(135deg,#22d3ee,#3b82f6 55%,#8b5cf6);
  --header-h:64px;
  --wrap:1240px;
  --r-lg:18px; --r-md:12px; --r-sm:8px;
  --sp-section:96px;
  --sp-section-sm:64px;
  --sp-head:36px;
  --gutter:24px;
  --side:264px;
  --font:"Segoe UI","PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"Cascadia Code",Consolas,"JetBrains Mono",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px);-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--txt);
  line-height:1.75;
  overflow-x:hidden;
  position:relative;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(34,211,238,.10),transparent 60%),
    radial-gradient(1000px 620px at 92% 6%,rgba(139,92,246,.10),transparent 62%),
    radial-gradient(820px 560px at 50% 112%,rgba(59,130,246,.08),transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(900px 480px at 50% 0%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(900px 480px at 50% 0%,#000 0%,transparent 78%);
}
::selection{background:rgba(34,211,238,.28)}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}
table{border-collapse:collapse;width:100%}

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

/* ---------------- 滚动进度条 ---------------- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:99;transition:width .08s linear}

/* ---------------- 顶部导航 ---------------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(7,10,18,.78);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-head .bar{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:12px;color:var(--txt)}
.brand:hover{text-decoration:none}
.brand .mark{
  width:38px;height:38px;border-radius:10px;overflow:hidden;flex:none;
  box-shadow:0 0 0 1px rgba(148,163,184,.25),0 6px 18px rgba(34,211,238,.18);
}
.brand .mark img{width:100%;height:100%;object-fit:cover}
.brand .bt b{display:block;font-size:1.06rem;line-height:1.25;letter-spacing:.5px}
.brand .bt span{display:block;font-size:.72rem;color:var(--txt-mute);letter-spacing:1.5px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{
  color:var(--txt-dim);font-size:.92rem;padding:8px 14px;border-radius:8px;
  transition:color .2s,background .2s;
}
.nav a:hover{color:var(--txt);background:rgba(148,163,184,.08);text-decoration:none}
.nav a.active{color:#06121c;background:linear-gradient(135deg,#22d3ee,#38bdf8);font-weight:600}
.nav a.nav-cta{
  margin-left:8px;color:#06121c;background:var(--grad);font-weight:600;
  box-shadow:0 4px 16px rgba(34,211,238,.25);
}
.menu-btn{display:none;background:none;border:1px solid var(--line-strong);border-radius:8px;
  color:var(--txt-dim);width:42px;height:42px;font-size:1.25rem;cursor:pointer}
.m-nav{display:none}

/* ---------------- 面包屑 ---------------- */
.crumbs{padding-top:22px}
.crumbs .wrap{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:.84rem;color:var(--txt-mute)}
.crumbs a{color:var(--txt-mute)}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{color:var(--txt-mute);opacity:.6}
.crumbs .cur{color:var(--txt-dim)}

/* ---------------- hero ---------------- */
.hero{padding:calc(var(--sp-section) * .62) 0 var(--sp-section);position:relative}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;color:var(--cyan);letter-spacing:2px;
  border:1px solid rgba(34,211,238,.35);border-radius:999px;padding:5px 16px;
  background:rgba(34,211,238,.07);margin-bottom:22px;
}
.hero-kicker .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
h1.hero-title{font-size:clamp(2.1rem,4.4vw,3.3rem);line-height:1.22;font-weight:800;letter-spacing:.5px}
h1.hero-title .hl{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:18px;font-size:1.08rem;color:var(--txt-dim);max-width:34em}
.hero-act{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero-meta{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.chip{
  font-size:.8rem;color:var(--txt-dim);border:1px solid var(--line-strong);
  border-radius:999px;padding:4px 14px;background:rgba(148,163,184,.05);
}
.chip b{color:var(--cyan);font-weight:600}
.hero-shot{position:relative}
.shot-frame{
  background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:10px;box-shadow:0 24px 60px rgba(0,0,0,.45),0 0 0 1px rgba(34,211,238,.06);
  position:relative;
}
.shot-frame::before{
  content:"";position:absolute;inset:-1px;border-radius:var(--r-lg);pointer-events:none;
  background:linear-gradient(135deg,rgba(34,211,238,.35),transparent 40%,transparent 62%,rgba(139,92,246,.35));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;padding:1px;
}
.shot-frame img{border-radius:10px}
.shot-cap{margin-top:14px;font-size:.84rem;color:var(--txt-mute);text-align:center}
.shot-frame a{display:block;line-height:0;border-radius:10px}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 26px;border-radius:10px;font-size:.96rem;font-weight:600;
  border:1px solid var(--line-strong);color:var(--txt);background:rgba(148,163,184,.06);
  cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;
  font-family:var(--font);line-height:1.5;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);border-color:rgba(34,211,238,.5)}
.btn-primary{
  background:var(--grad);color:#06121c;border:0;
  box-shadow:0 8px 24px rgba(34,211,238,.28);
}
.btn-primary:hover{box-shadow:0 12px 32px rgba(34,211,238,.4)}
.btn-lg{padding:14px 34px;font-size:1.04rem}
.btn-sm{padding:7px 16px;font-size:.85rem}

/* ---------------- section 与标题三版式 ---------------- */
section{scroll-margin-top:calc(var(--header-h) + 24px)}
.sec{padding:var(--sp-section) 0}
.sec-sm{padding:var(--sp-section-sm) 0}
.band{
  background:linear-gradient(180deg,rgba(13,20,36,.5),rgba(10,15,28,.2) 12%,rgba(10,15,28,.2) 88%,rgba(13,20,36,.5));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{text-align:center;max-width:760px;margin:0 auto var(--sp-head)}
.section-head h2,.sec-head h2,.rail-head h2,.doc-h2{
  font-size:clamp(1.5rem,2.6vw,2.05rem);font-weight:750;line-height:1.3;letter-spacing:.5px;
}
.section-head p{margin-top:12px;color:var(--txt-dim)}
.sec-head{
  display:flex;justify-content:space-between;align-items:flex-end;gap:24px;
  padding-bottom:18px;margin-bottom:var(--sp-head);
  border-bottom:1px solid var(--line);position:relative;
}
.sec-head::after{
  content:"";position:absolute;left:0;bottom:-1px;width:120px;height:2px;background:var(--grad);
}
.sec-head p{color:var(--txt-mute);font-size:.92rem;max-width:38em;text-align:right}
.rail-head{padding-left:18px;margin-bottom:var(--sp-head);position:relative}
.rail-head::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--grad);
}
.rail-head p{margin-top:8px;color:var(--txt-mute);font-size:.92rem}

/* ---------------- 网格与卡片 ---------------- */
.grid{display:grid;gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.g-asym{grid-template-columns:1.35fr 1fr}
.g-side{grid-template-columns:.8fr 1.22fr}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 26px 24px;position:relative;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4);box-shadow:0 16px 40px rgba(0,0,0,.35)}
.card--plain{background:transparent;border-style:dashed;box-shadow:none}
.card--accent::before{
  content:"";position:absolute;top:0;left:22px;right:22px;height:2px;border-radius:2px;background:var(--grad);
}
.card .ico{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(34,211,238,.14),rgba(139,92,246,.14));
  border:1px solid rgba(34,211,238,.25);margin-bottom:16px;
}
.card .ico svg{width:22px;height:22px;stroke:var(--cyan);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:1.08rem;font-weight:700;margin-bottom:8px}
.card p{color:var(--txt-dim);font-size:.92rem}
.card .more{display:inline-block;margin-top:14px;font-size:.86rem;color:var(--cyan)}
.card--row{display:grid;grid-template-columns:46px minmax(0,1fr);gap:4px 18px;align-items:start}
.card--row .ico{grid-row:1 / span 2;margin-bottom:0}
.card--row h3{margin-top:10px}
.card--row p{margin-top:2px}

/* ---------------- 泳道 ---------------- */
.lane{display:flex;flex-wrap:wrap;gap:14px}
.lane-item{
  flex:1 1 168px;min-width:168px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;position:relative;transition:border-color .2s,transform .2s;
}
.lane-item:hover{border-color:rgba(34,211,238,.4);transform:translateY(-3px)}
.lane-item::before{
  content:attr(data-n);position:absolute;top:14px;right:16px;
  font-size:.78rem;font-weight:700;color:var(--txt-mute);opacity:.7;
}
.lane-item b{display:block;font-size:.98rem;margin-bottom:4px}
.lane-item span{font-size:.82rem;color:var(--txt-mute)}

/* ---------------- 步骤 ---------------- */
.steps{display:grid;gap:18px;counter-reset:step}
.step{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:18px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);padding:22px 24px;
}
.step .no{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1.05rem;color:#06121c;background:var(--grad);
}
.step h3{font-size:1.02rem;margin-bottom:6px}
.step p{color:var(--txt-dim);font-size:.92rem}
.step p code,.prose code,p code,li code,td code{
  font-family:var(--mono);font-size:.86em;background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.2);border-radius:6px;padding:1px 7px;color:#7dd3fc;
}

/* ---------------- 表格 ---------------- */
.table-wrap{
  overflow-x:auto;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-md);
}
table.data{min-width:640px;font-size:.92rem}
table.data th{
  text-align:left;padding:14px 18px;color:var(--txt-mute);font-weight:600;font-size:.84rem;
  letter-spacing:1px;border-bottom:1px solid var(--line-strong);white-space:nowrap;
  background:rgba(148,163,184,.04);
}
table.data td{padding:13px 18px;border-bottom:1px solid var(--line);color:var(--txt-dim);vertical-align:top}
table.data tbody tr:last-child td{border-bottom:0}
table.data tbody tr:hover td{background:rgba(34,211,238,.03)}
table.data td b{color:var(--txt);font-weight:600}
.tag{
  display:inline-block;font-size:.76rem;padding:2px 10px;border-radius:999px;font-weight:600;
  background:rgba(74,222,128,.12);color:var(--green);border:1px solid rgba(74,222,128,.3);white-space:nowrap;
}
.tag--blue{background:rgba(59,130,246,.12);color:#93c5fd;border-color:rgba(59,130,246,.35)}
.tag--amber{background:rgba(251,191,36,.1);color:var(--amber);border-color:rgba(251,191,36,.3)}

@media (max-width:720px){
  table.stack{min-width:0;display:block}
  table.stack thead{display:none}
  table.stack tbody{display:block}
  table.stack tbody tr{display:block;padding:10px 16px 14px;border-bottom:1px solid var(--line)}
  table.stack tbody td{display:grid;grid-template-columns:96px minmax(0,1fr);gap:12px;padding:6px 0;border:0}
  table.stack tbody td::before{content:attr(data-label);font-size:.78rem;color:var(--txt-mute)}
}

/* ---------------- 速答区 ---------------- */
.seo-quick{
  margin-top:34px;background:var(--panel);border:1px solid var(--line);
  border-left:3px solid var(--cyan);border-radius:var(--r-md);padding:22px 26px;
}
.seo-quick h2{font-size:1rem;color:var(--cyan);letter-spacing:2px;margin-bottom:10px}
.seo-quick p{color:var(--txt-dim);font-size:.95rem;margin-top:6px}
.seo-quick p b{color:var(--txt)}

/* ---------------- 下载页 ---------------- */
.dl-hero{
  display:grid;grid-template-columns:1.22fr .78fr;gap:26px;margin-top:8px;
}
.dl-hero-main{
  background:linear-gradient(135deg,rgba(34,211,238,.08),rgba(139,92,246,.07));
  border:1px solid rgba(34,211,238,.3);border-radius:var(--r-lg);padding:32px 34px;
}
.dl-hero-main h2{font-size:1.5rem;margin-bottom:10px}
.dl-hero-main .lead{color:var(--txt-dim);margin-bottom:22px}
.dl-hero-act{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.dl-hero-meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}
.dl-side{display:grid;gap:22px;align-content:start}
.dl-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
}
.dl-card h3{font-size:1rem;margin-bottom:8px}
.dl-card p{font-size:.88rem;color:var(--txt-dim)}
.dl-card.featured{border-color:rgba(34,211,238,.35)}
.dl-note{
  margin-top:26px;border:1px solid rgba(251,191,36,.3);background:rgba(251,191,36,.05);
  border-radius:var(--r-md);padding:18px 22px;font-size:.9rem;color:var(--txt-dim);
}
.dl-note b{color:var(--amber)}
.dl-channels{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-chan{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;display:flex;flex-direction:column;gap:14px;
  transition:transform .25s,border-color .25s;
}
.dl-chan:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4)}
.dl-chan .cn{display:flex;align-items:center;gap:10px}
.dl-chan .cn .n{
  width:34px;height:34px;border-radius:10px;flex:none;display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#06121c;background:var(--grad);font-size:.95rem;
}
.dl-chan .cn b{font-size:1.02rem}
.dl-chan .desc{font-size:.86rem;color:var(--txt-dim);flex:1}
.dl-chan .act{display:flex;gap:10px;flex-wrap:wrap}
.dl-chan .act .btn{flex:1}
.dl-chan .code{margin-top:2px}

/* 复制块 */
.code{
  background:#0a1120;border:1px solid var(--line-strong);border-radius:var(--r-sm);
  overflow:hidden;
}
.code .code-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:8px 12px;border-bottom:1px solid var(--line);font-size:.8rem;color:var(--txt-mute);
}
.code .copy{
  background:none;border:1px solid var(--line-strong);color:var(--txt-dim);
  border-radius:6px;font-size:.76rem;padding:3px 12px;cursor:pointer;font-family:var(--font);
  transition:color .2s,border-color .2s;
}
.code .copy:hover{color:var(--cyan);border-color:rgba(34,211,238,.5)}
.code .copy.done{color:var(--green);border-color:rgba(74,222,128,.5)}
.code pre{padding:12px 14px;overflow-x:auto}
.code pre code{font-family:var(--mono);font-size:.82rem;color:#8be9fd;background:none;border:0;padding:0;white-space:pre-wrap;word-break:break-all}

/* ---------------- 下载页美化组件 ---------------- */
.dl-topglow{position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:900px;height:420px;pointer-events:none;z-index:0;
  background:radial-gradient(closest-side,rgba(34,211,238,.16),transparent 70%)}
.dl-hero-main{position:relative;overflow:hidden}
.dl-hero-main::after{
  content:"";position:absolute;right:-80px;bottom:-110px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(139,92,246,.18),transparent 70%);pointer-events:none;
}
.dl-hero-main > *{position:relative;z-index:1}
.dl-ver{
  display:flex;align-items:baseline;gap:12px;margin:14px 0 6px;flex-wrap:wrap;
}
.dl-ver b{
  font-size:clamp(2rem,4.2vw,2.9rem);font-weight:800;letter-spacing:1px;line-height:1.1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.dl-ver .vtag{
  font-size:.8rem;padding:3px 12px;border-radius:999px;font-weight:600;
  border:1px solid rgba(34,211,238,.45);color:var(--cyan);background:rgba(34,211,238,.08);
}
.dl-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:34px;
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);overflow:hidden;
}
.dl-stats .ds{padding:20px 18px;text-align:center;border-right:1px solid var(--line)}
.dl-stats .ds:last-child{border-right:0}
.dl-stats .ds b{
  display:block;font-size:1.22rem;font-weight:800;color:var(--txt);letter-spacing:.5px;
}
.dl-stats .ds span{font-size:.8rem;color:var(--txt-mute)}

.dl-chan{position:relative;overflow:hidden}
.dl-chan::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.55;
  transition:opacity .25s;
}
.dl-chan:hover::before{opacity:1}
.dl-chan--rec{border-color:rgba(34,211,238,.42);box-shadow:0 12px 34px rgba(34,211,238,.10)}
.chan-rec{
  position:absolute;top:0;right:0;font-size:.74rem;font-weight:700;letter-spacing:1px;
  color:#06121c;background:var(--grad);padding:4px 16px 4px 18px;border-bottom-left-radius:12px;
}
.dl-chan .cn{gap:12px}
.dl-chan .cn .ci{
  width:40px;height:40px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(34,211,238,.14),rgba(139,92,246,.14));
  border:1px solid rgba(34,211,238,.25);
}
.dl-chan .cn .ci svg{width:20px;height:20px;stroke:var(--cyan);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.dl-chan .cn .n{width:32px;height:32px;font-size:.92rem;border-radius:9px}
.dl-chan .cn b{font-size:1.05rem}
.dl-chan .cmeta{display:flex;flex-wrap:wrap;gap:8px}
.dl-chan .desc{margin-top:-4px}
.dl-chan .act .btn{flex:1 1 auto}
.dl-chan .act .btn-primary{flex:1 1 60%}

/* 下载包内容清单 */
.files{display:grid;gap:12px}
.files-row{
  display:grid;grid-template-columns:34px 240px minmax(0,1fr);gap:16px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 20px;transition:border-color .2s,transform .2s;
}
.files-row:hover{border-color:rgba(34,211,238,.35);transform:translateY(-2px)}
.files-row .fi{
  width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.2);
}
.files-row .fi svg{width:18px;height:18px;stroke:var(--cyan);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.files-row b{font-size:.98rem;font-weight:700}
.files-row span{font-size:.9rem;color:var(--txt-mute)}

.warn-list{list-style:none;display:grid;gap:10px}
.warn-list li{padding-left:30px;position:relative;color:var(--txt-dim);font-size:.94rem}
.warn-list li::before{
  content:"!";position:absolute;left:0;top:0;width:18px;height:18px;border-radius:50%;
  color:#0b1220;background:var(--amber);font-weight:800;font-size:.78rem;
  display:flex;align-items:center;justify-content:center;margin-top:.32em;
}

/* 工具详解入口 */
.tool-item a{color:inherit;display:block}
.tool-item a:hover{text-decoration:none}
.tool-item a b{color:var(--txt)}
.tool-item a:hover b{color:var(--cyan)}
.tool-item .go{
  display:inline-block;margin-top:6px;font-size:.78rem;color:var(--cyan);
  border-bottom:1px dashed rgba(34,211,238,.5);
}

/* ---------------- 手风琴 FAQ ---------------- */
.acc{display:grid;gap:14px}
details.acc-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .2s;
}
details.acc-item[open]{border-color:rgba(34,211,238,.4)}
details.acc-item summary{
  list-style:none;cursor:pointer;padding:18px 52px 18px 24px;position:relative;
  font-weight:600;font-size:.98rem;color:var(--txt);
}
details.acc-item summary::-webkit-details-marker{display:none}
details.acc-item summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:1.3rem;color:var(--cyan);font-weight:400;transition:transform .2s;
}
details.acc-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
details.acc-item .acc-body{padding:0 24px 20px;color:var(--txt-dim);font-size:.93rem}
details.acc-item .acc-body p{margin-top:6px}

/* ---------------- 版本时间线 ---------------- */
.timeline{display:grid;gap:0;position:relative;padding-left:30px}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--cyan),rgba(139,92,246,.4));
}
.tl-item{position:relative;padding:0 0 40px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-27px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:3px solid var(--cyan);box-shadow:0 0 12px rgba(34,211,238,.5);
}
.tl-item .tl-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;margin-bottom:10px}
.tl-item .ver{font-size:1.2rem;font-weight:800}
.tl-item .date{font-size:.84rem;color:var(--txt-mute)}
.tl-item .tag{transform:translateY(-2px)}
.tl-item ul{list-style:none;display:grid;gap:7px}
.tl-item li{
  color:var(--txt-dim);font-size:.93rem;padding-left:20px;position:relative;
}
.tl-item li::before{
  content:"";position:absolute;left:2px;top:.62em;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}

/* ---------------- 文档双栏 ---------------- */
.doc{display:grid;grid-template-columns:var(--side) minmax(0,1fr);gap:44px;align-items:start;padding-top:34px}
.doc-toc{position:sticky;top:calc(var(--header-h) + 24px);max-height:calc(100vh - var(--header-h) - 48px);overflow-y:auto}
.doc-toc .toc-title{font-size:.8rem;letter-spacing:2px;color:var(--txt-mute);margin-bottom:12px}
.doc-toc nav{display:grid;gap:2px;border-left:1px solid var(--line-strong)}
.doc-toc nav a{
  color:var(--txt-mute);font-size:.88rem;padding:7px 0 7px 16px;margin-left:-1px;
  border-left:2px solid transparent;
}
.doc-toc nav a:hover{color:var(--txt);text-decoration:none}
.doc-toc nav a.active{color:var(--cyan);border-left-color:var(--cyan)}
.doc-main{min-width:0}
.doc-main > section{padding:0 0 52px}
.doc-main > section:last-of-type{padding-bottom:0}
.doc-h2{padding-bottom:12px;margin-bottom:18px;border-bottom:1px solid var(--line);position:relative}
.doc-h2::after{content:"";position:absolute;left:0;bottom:-1px;width:64px;height:2px;background:var(--grad)}
.toc-toggle{display:none}

/* ---------------- 提示块 ---------------- */
.note{
  border-radius:var(--r-md);padding:16px 20px;font-size:.9rem;color:var(--txt-dim);
  border:1px solid var(--line-strong);background:rgba(148,163,184,.05);margin:16px 0;
}
.note b{color:var(--txt)}
.note--warn{border-color:rgba(251,191,36,.35);background:rgba(251,191,36,.05)}
.note--warn b{color:var(--amber)}
.note--good{border-color:rgba(74,222,128,.3);background:rgba(74,222,128,.05)}
.note--good b{color:var(--green)}

/* ---------------- 继续阅读 / 内链模块 ---------------- */
.related{padding:var(--sp-section-sm) 0 var(--sp-section-sm)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rel-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;color:var(--txt-dim);font-size:.88rem;
  transition:transform .2s,border-color .2s;display:block;
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.4);text-decoration:none}
.rel-card b{display:block;color:var(--txt);font-size:.98rem;margin-bottom:6px}
.rel-card span{color:var(--txt-mute);font-size:.82rem}

/* ---------------- CTA ---------------- */
.cta{
  text-align:center;padding:64px 28px;border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(34,211,238,.09),rgba(139,92,246,.1));
  border:1px solid rgba(34,211,238,.28);position:relative;overflow:hidden;
}
.cta h2{font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:12px}
.cta p{color:var(--txt-dim);margin-bottom:26px}
.cta .act{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------------- 页脚 ---------------- */
.site-foot{border-top:1px solid var(--line);background:rgba(7,10,18,.7);margin-top:var(--sp-section)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:32px;padding:52px 0 36px}
.foot-brand .brand{margin-bottom:14px}
.foot-desc{font-size:.86rem;color:var(--txt-mute);max-width:30em}
.foot-col h3{font-size:.82rem;letter-spacing:2px;color:var(--txt-mute);margin-bottom:14px;font-weight:600}
.foot-col ul{list-style:none;display:grid;gap:9px}
.foot-col a{color:var(--txt-dim);font-size:.88rem}
.foot-col a:hover{color:var(--cyan)}
.foot-base{
  border-top:1px solid var(--line);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:.78rem;color:var(--txt-mute);
}
.foot-base a{color:var(--txt-mute)}
.upd{display:inline-flex;align-items:center;gap:6px}
.upd::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green)}

/* ---------------- 回顶 ---------------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:12px;
  background:var(--panel-2);border:1px solid var(--line-strong);color:var(--cyan);
  font-size:1.1rem;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .25s,transform .25s;z-index:60;
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{border-color:rgba(34,211,238,.5)}

/* ---------------- 内页页头 ---------------- */
.page-head{padding:54px 0 10px}
.page-head h1{font-size:clamp(1.75rem,3.6vw,2.55rem);line-height:1.28;font-weight:800;letter-spacing:.5px}
.page-head h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-head .lead{margin-top:16px;color:var(--txt-dim);max-width:46em;font-size:1.02rem}

/* ---------------- 杂项 ---------------- */
.num-stat{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.num-stat .ns{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;text-align:center;
}
.num-stat .ns b{
  display:block;font-size:1.7rem;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.num-stat .ns span{font-size:.84rem;color:var(--txt-mute)}
.check-list{list-style:none;display:grid;gap:10px}
.check-list li{padding-left:28px;position:relative;color:var(--txt-dim);font-size:.94rem}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--green);font-weight:700;
}
.kbd{
  font-family:var(--mono);font-size:.8em;border:1px solid var(--line-strong);
  border-bottom-width:2px;border-radius:6px;padding:1px 8px;background:rgba(148,163,184,.07);color:var(--txt-dim);
}
.filter-box{position:relative;margin-bottom:22px}
.filter-box input{
  width:100%;background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;
  padding:12px 16px 12px 42px;color:var(--txt);font-size:.95rem;font-family:var(--font);outline:none;
  transition:border-color .2s;
}
.filter-box input:focus{border-color:rgba(34,211,238,.5)}
.filter-box::before{
  content:"🔍";position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:.9rem;opacity:.7;
}
.cat-block{margin-bottom:34px}
.cat-block > h3{
  font-size:1.15rem;margin-bottom:14px;padding-left:14px;position:relative;
}
.cat-block > h3::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:4px;background:var(--grad);
}
.cat-block .tools{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.tool-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:14px 18px;transition:border-color .2s;
}
.tool-item:hover{border-color:rgba(34,211,238,.35)}
.tool-item b{display:block;font-size:.95rem;margin-bottom:3px}
.tool-item span{font-size:.84rem;color:var(--txt-mute)}
.tool-item.hide,.cat-block.hide{display:none}
.no-result{display:none;color:var(--txt-mute);padding:30px 0;text-align:center}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-shot{max-width:640px}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  :root{--sp-section:64px;--sp-section-sm:48px}
  .nav{display:none}
  .menu-btn{display:flex;align-items:center;justify-content:center}
  .m-nav{
    display:none;position:absolute;top:var(--header-h);left:0;right:0;
    background:rgba(9,13,24,.98);border-bottom:1px solid var(--line-strong);
    padding:10px 20px 18px;flex-direction:column;gap:2px;
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  }
  .m-nav.open{display:flex}
  .m-nav a{color:var(--txt-dim);padding:12px 8px;border-bottom:1px solid var(--line);font-size:.96rem}
  .m-nav a.active{color:var(--cyan)}
  .m-nav a.nav-cta{color:#06121c;background:var(--grad);border-radius:10px;text-align:center;margin-top:10px;font-weight:600}
  .g-3,.g-asym,.g-side{grid-template-columns:1fr}
  .dl-hero{grid-template-columns:1fr}
  .dl-channels{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start}
  .sec-head p{text-align:left}
  .doc{grid-template-columns:minmax(0,1fr);gap:20px}
  .doc-toc{position:static;max-height:none;overflow:visible;border:1px solid var(--line);
    border-radius:var(--r-md);background:var(--panel);padding:6px 16px}
  .toc-toggle{
    display:flex;justify-content:space-between;align-items:center;width:100%;
    background:none;border:0;color:var(--txt);font-size:.95rem;font-weight:600;
    padding:12px 0;cursor:pointer;font-family:var(--font);
  }
  .toc-toggle .ico-x{transition:transform .2s;color:var(--cyan)}
  .doc-toc.collapsed .toc-toggle .ico-x{transform:rotate(45deg)}
  .doc-toc nav{display:none;border-left:0;padding-bottom:12px}
  .doc-toc:not(.collapsed) nav{display:grid}
  .related-grid{grid-template-columns:1fr}
  .num-stat{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .g-2,.g-4{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .hero-act .btn{width:100%}
  .dl-hero-act .btn{width:100%}
  .dl-chan .act .btn{width:100%}
  .brand .bt span{display:none}
  .crumbs{padding-top:16px}
  .card{padding:22px 20px}
  .cta .act .btn{width:100%}
  .code pre{white-space:pre-wrap;word-break:break-word}
}
/* 下载页组件响应式（放在最后，覆盖前面的基础规则） */
@media (max-width:1080px){
  .dl-stats{grid-template-columns:repeat(2,1fr)}
  .dl-stats .ds:nth-child(2n){border-right:0}
  .dl-stats .ds:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
@media (max-width:900px){
  .dl-stats{grid-template-columns:repeat(2,1fr)}
  .files-row{grid-template-columns:1fr;gap:8px}
  .files-row .fi{display:none}
  .dl-topglow{width:100%}
}
@media (max-width:560px){
  .dl-stats{grid-template-columns:1fr}
  .dl-stats .ds{border-right:0;border-bottom:1px solid var(--line)}
  .dl-stats .ds:last-child{border-bottom:0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}