/* ==========================================================================
   NavAuth / 臻云 官网设计系统 v3 —— 微光玻璃拟态（Luminous Glass）
   ---------------------------------------------------------------------------
   设计依据（联网调研 2026 主流做法，参数取自多份玻璃拟态实践指南的共识区间）：
     玻璃配方：background rgba 白 0.12~0.30（深色底）/ 0.55~0.72（浅色底）
               backdrop-filter: blur(12~20px) saturate(160~180%)  ← 12~16px 为最佳区间
               1px 半透明亮边（光线在玻璃棱边的高光）
               inset 0 1px 0 rgba(255,255,255,.7x)  ← 最易被忽略、却最决定「真实感」
     硬性前提：玻璃必须叠在「有层次/有颜色」的背景上，纯色底上玻璃不可见
               → 因此页面背景采用低饱和弥散光（mesh / 光斑）而非纯色
     性能与克制：backdrop-filter 只用于吸顶导航/主视觉面板等重点元素（单屏 ≤3 处），
               普通卡片用半透明填充模拟霜面，避免大面积实时模糊
     可读性：玻璃上不放 10% 透明度上的正文；文字统一加深，并提供
             @supports 与 prefers-reduced-transparency 的不透明回退
   ========================================================================== */

:root{
  --bg:#eef1f7;
  --surface:#ffffff;
  --surface-2:#f5f7fb;
  --ink:#0d1424;
  --ink-2:#454e66;
  --ink-3:#6d768c;
  --line:rgba(13,20,36,.10);
  --line-2:rgba(13,20,36,.06);
  --accent:#3b5bdb;
  --ok:#0f9d63;
  --warn:#b4690e;
  --danger:#c0263a;

  /* 玻璃配方（浅色底） */
  --glass-fill:rgba(255,255,255,.58);
  --glass-border:rgba(255,255,255,.68);
  --glass-inner:rgba(255,255,255,.80);
  --glass-blur:blur(18px) saturate(180%);
  --glass-shadow:0 10px 40px rgba(16,24,48,.12);

  /* 霜面卡片（不使用 backdrop-filter，成本更低） */
  --card-fill:rgba(255,255,255,.68);
  --card-border:rgba(255,255,255,.85);
  --card-shadow:0 1px 2px rgba(16,24,48,.04), 0 14px 34px rgba(16,24,48,.07);

  --radius:18px;
  --radius-sm:12px;
  --radius-lg:26px;
  --maxw:1180px;
  --gutter:24px;
  --section-y:104px;

  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-display:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

[data-theme="dark"]{
  --bg:#080b14;
  --surface:#141926;
  --surface-2:#121722;
  --ink:#eef2fa;
  --ink-2:#a9b3ca;
  --ink-3:#79839c;
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);
  --accent:#8ea8ff;
  --ok:#3ddc97;
  --warn:#f0b457;
  --danger:#ff7a8a;

  --glass-fill:rgba(22,27,41,.52);
  --glass-border:rgba(255,255,255,.12);
  --glass-inner:rgba(255,255,255,.10);
  --glass-shadow:0 12px 44px rgba(0,0,0,.5);
  --card-fill:rgba(21,26,39,.62);
  --card-border:rgba(255,255,255,.09);
  --card-shadow:0 1px 2px rgba(0,0,0,.3), 0 16px 38px rgba(0,0,0,.4);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.78;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background:var(--bg);overflow-x:hidden;
}
/* 弥散光背景：低饱和多点径向光斑，给玻璃提供可折射的「层次」 */
body::before{
  content:"";position:fixed;inset:-25% -15%;z-index:-1;pointer-events:none;
  background:
    radial-gradient(38% 34% at 12% 6%,  rgba(96,131,255,.62),  transparent 62%),
    radial-gradient(34% 30% at 88% 4%,  rgba(159,124,255,.52), transparent 60%),
    radial-gradient(42% 38% at 80% 86%, rgba(22,197,227,.44),  transparent 64%),
    radial-gradient(30% 28% at 6% 80%,  rgba(236,150,250,.40), transparent 60%),
    radial-gradient(26% 24% at 50% 46%, rgba(255,201,138,.30), transparent 62%);
}
[data-theme="dark"] body::before{
  background:
    radial-gradient(38% 34% at 12% 6%,  rgba(58,86,220,.44), transparent 62%),
    radial-gradient(34% 30% at 88% 4%,  rgba(112,72,196,.40), transparent 60%),
    radial-gradient(42% 38% at 80% 86%, rgba(14,148,168,.34),  transparent 64%),
    radial-gradient(30% 28% at 6% 80%,  rgba(150,70,160,.30), transparent 60%);
}
/* 轻微纸张颗粒，削弱大面积渐变的「塑料感」 */
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.35;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.045'/%3E%3C/svg%3E");
}

a{color:var(--ink);text-decoration:none;transition:color .16s ease,opacity .16s ease}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
::selection{background:rgba(59,91,219,.18)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);position:relative}
.container.narrow{max-width:800px}

/* ---------- 玻璃基元 ---------- */
.glass{
  background:var(--glass-fill);
  -webkit-backdrop-filter:var(--glass-blur);
  backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  box-shadow:var(--glass-shadow), inset 0 1px 0 var(--glass-inner);
}
/* 卡片层也使用真实背景模糊，保持与导航/主面板一致的玻璃语言
   （对比度由 --card-fill 的不透明度保证；模糊只作用于静态卡片，不做动画） */
.card{
  background:var(--card-fill);
  -webkit-backdrop-filter:blur(14px) saturate(165%);
  backdrop-filter:blur(14px) saturate(165%);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  box-shadow:var(--card-shadow), inset 0 1px 0 var(--glass-inner);
  padding:28px;
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  /* 不支持背景模糊时提高不透明度保证可读，但保留半透感（避免变成死白卡片） */
  .glass{background:rgba(255,255,255,.82)}
  [data-theme="dark"] .glass{background:rgba(20,25,38,.86)}
}
@media (prefers-reduced-transparency:reduce){
  /* 该偏好要求「降低透明度」：提高填充不透明度即可；保留模糊，否则玻璃质感完全消失 */
  .glass{background:rgba(255,255,255,.88)}
  [data-theme="dark"] .glass{background:rgba(20,25,38,.92)}
  body::before{opacity:.8}
}

/* ---------- 吸顶导航（玻璃 #1） ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:14px 0 0}
.site-header .inner{
  max-width:var(--maxw);margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:24px;
  background:var(--glass-fill);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);border-radius:999px;
  box-shadow:0 8px 28px rgba(16,24,48,.10), inset 0 1px 0 var(--glass-inner);
}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:15.5px;letter-spacing:-.01em}
.brand .logo{
  width:30px;height:30px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:16px;font-weight:700;color:#fff;
  background:linear-gradient(145deg,#4a63e0,#7b52d6);
  box-shadow:0 4px 14px rgba(80,90,220,.38), inset 0 1px 0 rgba(255,255,255,.4);
}
.brand small{display:block;font-size:11px;color:var(--ink-3);font-weight:500;letter-spacing:.04em;line-height:1.4}
.nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.nav a{padding:8px 14px;border-radius:999px;color:var(--ink-2);font-size:14px;font-weight:500}
.nav a:hover{color:var(--ink);background:rgba(255,255,255,.55)}
[data-theme="dark"] .nav a:hover{background:rgba(255,255,255,.08)}
.nav a.active{color:var(--ink);font-weight:600;background:rgba(255,255,255,.62)}
[data-theme="dark"] .nav a.active{background:rgba(255,255,255,.10)}
.nav .cta{background:var(--ink);color:var(--bg);padding:9px 18px;margin-left:10px;font-weight:600}
.nav .cta:hover{color:var(--bg);opacity:.88}
.theme-btn,.menu-btn{
  border:1px solid var(--line);background:rgba(255,255,255,.5);color:var(--ink-2);
  width:34px;height:34px;border-radius:999px;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;margin-left:8px;
}
[data-theme="dark"] .theme-btn,[data-theme="dark"] .menu-btn{background:rgba(255,255,255,.06)}
.theme-btn:hover,.menu-btn:hover{color:var(--ink)}
.theme-btn svg,.menu-btn svg{display:block}
.theme-btn .ic-moon{display:none}
[data-theme="dark"] .theme-btn .ic-sun{display:none}
[data-theme="dark"] .theme-btn .ic-moon{display:block}
.menu-btn{display:none}

/* ---------- 版式 ---------- */
.section{padding:var(--section-y) 0;position:relative}
.section.tight{padding:calc(var(--section-y) * .62) 0}
.section-head{margin:0 0 48px;max-width:660px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{
  margin:0 0 14px;font-family:var(--font-display);
  font-size:clamp(1.65rem,2.8vw,2.35rem);font-weight:700;line-height:1.28;letter-spacing:.01em;
}
.section-head p{margin:0;color:var(--ink-2);font-size:16px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);
  background:rgba(255,255,255,.55);border:1px solid var(--glass-border);border-radius:999px;
  padding:5px 13px;margin:0 0 18px;box-shadow:inset 0 1px 0 var(--glass-inner);
}
[data-theme="dark"] .eyebrow{background:rgba(255,255,255,.06)}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(59,91,219,.16)}
.muted{color:var(--ink-3);font-size:13.5px}
.mono{font-family:var(--mono);font-size:.92em}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--ink);color:var(--bg);border:1px solid transparent;border-radius:999px;
  padding:12px 26px;font-size:14.5px;font-weight:600;font-family:inherit;cursor:pointer;
  text-decoration:none;transition:transform .16s ease,opacity .16s ease,background .16s ease;
  box-shadow:0 6px 20px rgba(16,24,48,.18);
}
.btn:hover{color:var(--bg);opacity:.9;transform:translateY(-2px)}
.btn.ghost{
  background:var(--glass-fill);color:var(--ink);border-color:var(--glass-border);
  -webkit-backdrop-filter:blur(12px) saturate(160%);backdrop-filter:blur(12px) saturate(160%);
  box-shadow:0 6px 20px rgba(16,24,48,.08), inset 0 1px 0 var(--glass-inner);
}
.btn.ghost:hover{color:var(--ink);opacity:1;border-color:rgba(255,255,255,.9)}
.btn.lg{padding:15px 32px;font-size:15.5px}
.btn.sm{padding:8px 15px;font-size:13px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.grid.gap{background:transparent;border:0}

/* ---------- 标签 ---------- */
.pill{
  display:inline-block;border-radius:999px;padding:3px 10px;font-size:11.5px;font-weight:600;
  border:1px solid var(--line);color:var(--ink-2);background:rgba(255,255,255,.6);
}
[data-theme="dark"] .pill{background:rgba(255,255,255,.07)}
.pill.ok{border-color:rgba(15,157,99,.28);color:var(--ok);background:rgba(15,157,99,.10)}
.pill.warn{border-color:rgba(180,105,14,.28);color:var(--warn);background:rgba(180,105,14,.10)}
.pill.off{border-color:var(--line);color:var(--ink-3)}
.tag-chip{
  display:inline-block;font-size:12.5px;color:var(--ink-2);border:1px solid var(--glass-border);
  border-radius:999px;padding:4px 11px;background:rgba(255,255,255,.5);
}
[data-theme="dark"] .tag-chip{background:rgba(255,255,255,.06)}
.tag-chip:hover{color:var(--ink);border-color:rgba(255,255,255,.95)}

.alert{
  border-radius:var(--radius-sm);padding:13px 16px;font-size:13.5px;margin-bottom:16px;
  border:1px solid var(--card-border);background:var(--card-fill);color:var(--ink-2);
}
.alert-ok{border-color:rgba(15,157,99,.26);background:rgba(15,157,99,.09);color:var(--ok)}
.alert-danger{border-color:rgba(192,38,58,.26);background:rgba(192,38,58,.09);color:var(--danger)}
.alert-info{border-color:rgba(59,91,219,.22);background:rgba(59,91,219,.08);color:var(--ink-2)}
.alert-warn{border-color:rgba(180,105,14,.26);background:rgba(180,105,14,.09);color:var(--warn)}

/* ---------- Hero（玻璃 #2：主视觉面板） ---------- */
.hero{padding:76px 0 var(--section-y)}
.hero .hero-panel{
  padding:clamp(34px,4.4vw,60px);
  border-radius:var(--radius-lg);
  /* 主视觉面板加大模糊与饱和度，让玻璃感更明确 */
  -webkit-backdrop-filter:blur(24px) saturate(185%);
  backdrop-filter:blur(24px) saturate(185%);
  background:rgba(255,255,255,.50);
}
[data-theme="dark"] .hero .hero-panel{background:rgba(20,25,38,.48)}
.hero h1{
  margin:0 0 24px;font-family:var(--font-display);max-width:17.5em;
  font-size:clamp(2.2rem,4.6vw,3.5rem);line-height:1.2;font-weight:700;letter-spacing:.005em;
  text-wrap:balance;
}
.hero h1 em{font-style:normal;color:var(--accent);white-space:nowrap}
.hero p.lead{margin:0 0 34px;max-width:62ch;font-size:16.5px;line-height:1.9;color:var(--ink-2)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:38px}
.hero-note{font-size:13.5px;color:var(--ink-2)}
.facts{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;
  padding-top:28px;border-top:1px solid var(--line);
}
.fact{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-2)}
.fact::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 6px;margin-top:9px;
  box-shadow:0 0 0 3px rgba(59,91,219,.14);
}

/* ---------- 本托网格（Bento） ---------- */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.bento .b-item{padding:32px 30px;border-radius:var(--radius);display:flex;flex-direction:column}
.bento .b-wide{grid-column:span 2}
.bento .b-tall{grid-row:span 2}
.feature-num{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--accent);
  margin-bottom:16px;display:block;
}
.bento h3,.feature h3{margin:0 0 10px;font-size:16.5px;font-weight:700;letter-spacing:-.01em}
.bento p,.feature p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.88}
.feature{padding:30px 28px}

/* ---------- 产品卡 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px}
.prod-card{
  display:flex;flex-direction:column;overflow:hidden;padding:0;border-radius:var(--radius);
  transition:transform .18s ease,box-shadow .18s ease;
}
.prod-card:hover{transform:translateY(-4px);box-shadow:0 20px 50px rgba(16,24,48,.14), inset 0 1px 0 var(--glass-inner)}
.prod-cover{
  aspect-ratio:16/9;background:linear-gradient(140deg,rgba(74,99,224,.18),rgba(123,82,214,.14));
  display:flex;align-items:center;justify-content:center;overflow:hidden;border-bottom:1px solid var(--line-2);
}
.prod-cover img{width:100%;height:100%;object-fit:cover}
.prod-cover .ph{
  font-family:var(--font-display);font-size:34px;font-weight:700;color:rgba(13,20,36,.28);
}
[data-theme="dark"] .prod-cover .ph{color:rgba(255,255,255,.3)}
.prod-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.prod-body h3{margin:0;font-size:18px;font-weight:700;letter-spacing:-.01em}
.prod-body .tagline{margin:0;color:var(--ink-2);font-size:14px;line-height:1.8;min-height:44px}
.prod-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line-2)}
.prod-price{font-size:22px;font-weight:800;letter-spacing:-.02em}
.prod-price small{font-size:12.5px;color:var(--ink-3);font-weight:500;margin-left:5px}

/* ---------- 定价 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:22px}
.price-card{display:flex;flex-direction:column}
.price-card.pick{border-color:rgba(59,91,219,.4);box-shadow:0 20px 48px rgba(59,91,219,.16), inset 0 1px 0 var(--glass-inner)}
.price-card .name{margin:0 0 8px;font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px}
.price-card .desc{color:var(--ink-3);font-size:13px;margin:0 0 20px;line-height:1.75;min-height:38px}
.price-card .amount{font-size:36px;font-weight:800;letter-spacing:-.03em;line-height:1}
.price-card .amount small{font-size:12.5px;color:var(--ink-3);font-weight:500;margin-left:6px}
.price-card ul{
  list-style:none;margin:22px 0 26px;padding:20px 0 0;display:flex;flex-direction:column;gap:10px;
  border-top:1px solid var(--line-2);
}
.price-card li{font-size:13.5px;color:var(--ink-2);display:flex;gap:10px;align-items:flex-start;line-height:1.65}
.price-card li::before{content:"—";color:var(--accent);flex:0 0 auto}
.price-card .btn{margin-top:auto;width:100%}
.ribbon{
  display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:#fff;background:linear-gradient(145deg,#4a63e0,#7b52d6);border-radius:999px;padding:3px 10px;
  box-shadow:0 4px 12px rgba(80,90,220,.3);
}

/* ---------- 流程 ---------- */
.steps{counter-reset:s}
.step{padding:30px 28px}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);display:block;font-family:var(--mono);
  font-size:20px;color:var(--accent);margin-bottom:14px;letter-spacing:.06em;
}
.step h3{margin:0 0 9px;font-size:15.5px;font-weight:700}
.step p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.85}

/* ---------- 文章 / 新闻 ---------- */
.art-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:22px}
.art-item{padding:26px;display:flex;flex-direction:column;gap:12px;transition:transform .18s ease,box-shadow .18s ease}
.art-item:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(16,24,48,.13), inset 0 1px 0 var(--glass-inner)}
.art-item h3{margin:0;font-size:16.5px;font-weight:700;line-height:1.5;letter-spacing:-.01em}
.art-item .sum{
  margin:0;color:var(--ink-2);font-size:14px;line-height:1.82;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.art-meta{
  display:flex;gap:14px;font-size:12px;color:var(--ink-3);margin-top:auto;padding-top:14px;
  border-top:1px solid var(--line-2);font-family:var(--mono);
}
.art-list{display:flex;flex-direction:column;gap:0}
.art-row{
  display:flex;gap:20px;align-items:baseline;justify-content:space-between;
  padding:18px 22px;border-radius:var(--radius-sm);border-bottom:1px solid var(--line-2);
  transition:background .16s ease;
}
.art-row:hover{background:rgba(255,255,255,.6)}
[data-theme="dark"] .art-row:hover{background:rgba(255,255,255,.05)}
.art-row .t{font-size:15.5px;font-weight:600}
.art-row .d{font-family:var(--mono);font-size:12.5px;color:var(--ink-3);white-space:nowrap}

.art-hero{padding:56px 0 30px;margin-bottom:38px;border-bottom:1px solid var(--line)}
.art-hero h1{
  margin:0 0 18px;font-family:var(--font-display);
  font-size:clamp(1.6rem,3vw,2.25rem);line-height:1.34;font-weight:700;letter-spacing:.005em;
}
.art-body{font-size:16.5px;line-height:1.95}
.art-body h2{margin:44px 0 16px;font-size:21px;font-weight:700;font-family:var(--font-display)}
.art-body h3{margin:32px 0 13px;font-size:17.5px;font-weight:700}
.art-body p{margin:0 0 20px}
.art-body ul,.art-body ol{margin:0 0 20px;padding-left:22px}
.art-body li{margin:7px 0}
.art-body img{border-radius:var(--radius-sm);margin:22px 0;box-shadow:var(--card-shadow)}
.art-body figure{margin:24px 0}
.art-body figcaption{text-align:center;color:var(--ink-3);font-size:12.5px;margin-top:10px}
.art-body blockquote{
  margin:22px 0;padding:6px 0 6px 20px;border-left:3px solid rgba(59,91,219,.5);color:var(--ink-2);
}
.art-body code{
  font-family:var(--mono);background:rgba(13,20,36,.06);border:1px solid var(--line-2);
  padding:2px 6px;border-radius:6px;font-size:.88em;
}
[data-theme="dark"] .art-body code{background:rgba(255,255,255,.08)}
.art-body a{color:var(--accent);border-bottom:1px solid rgba(59,91,219,.3)}

.pager{display:flex;gap:8px;margin-top:40px;flex-wrap:wrap}
.pager a,.pager span{
  padding:8px 15px;border:1px solid var(--glass-border);border-radius:999px;
  background:rgba(255,255,255,.55);color:var(--ink-2);font-size:13.5px;font-family:var(--mono);
}
[data-theme="dark"] .pager a,[data-theme="dark"] .pager span{background:rgba(255,255,255,.06)}
.pager a:hover{color:var(--ink)}
.pager span.cur{background:var(--ink);border-color:transparent;color:var(--bg)}
.empty{padding:64px 20px;text-align:center;color:var(--ink-3);font-size:14px}

/* ---------- 文档中心 ---------- */
.doc-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:26px;align-items:start}
.doc-side{
  position:sticky;top:96px;padding:20px 18px;max-height:calc(100vh - 130px);overflow:auto;
}
.doc-side h4{
  margin:0 0 10px;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);
}
.doc-side .cat{margin-bottom:18px}
.doc-side .cat>a{
  display:block;font-size:13.5px;font-weight:700;padding:6px 10px;border-radius:8px;color:var(--ink);
}
.doc-side .cat>a:hover{background:rgba(255,255,255,.6)}
[data-theme="dark"] .doc-side .cat>a:hover{background:rgba(255,255,255,.06)}
.doc-side .cat ul{list-style:none;margin:4px 0 0;padding:0}
.doc-side .cat li a{
  display:block;font-size:13px;color:var(--ink-2);padding:6px 10px 6px 18px;border-radius:8px;
  border-left:2px solid transparent;
}
.doc-side .cat li a:hover{color:var(--ink);background:rgba(255,255,255,.55)}
.doc-side .cat li a.on{
  color:var(--accent);background:rgba(59,91,219,.10);border-left-color:var(--accent);font-weight:600;
}
.doc-main{min-width:0}
.doc-toc{
  padding:18px 20px;font-size:13px;
}
.doc-toc h4{margin:0 0 10px;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.doc-toc a{display:block;padding:5px 0;color:var(--ink-2);font-size:13px}
.doc-toc a.lv3{padding-left:14px;font-size:12.5px;color:var(--ink-3)}
.doc-toc a:hover{color:var(--accent)}
.doc-body{font-size:16px;line-height:1.95}
.doc-body h2{margin:40px 0 14px;font-size:21px;font-weight:700;font-family:var(--font-display);scroll-margin-top:96px}
.doc-body h3{margin:30px 0 12px;font-size:17px;font-weight:700;scroll-margin-top:96px}
.doc-body p{margin:0 0 18px}
.doc-body ul,.doc-body ol{margin:0 0 18px;padding-left:22px}
.doc-body li{margin:6px 0}
.doc-body img{border-radius:var(--radius-sm);margin:20px 0;box-shadow:var(--card-shadow)}
.doc-body pre{
  background:rgba(13,20,36,.05);border:1px solid var(--line-2);border-radius:var(--radius-sm);
  padding:14px 16px;overflow:auto;font-family:var(--mono);font-size:13px;line-height:1.7;
}
[data-theme="dark"] .doc-body pre{background:rgba(255,255,255,.05)}
.doc-body code{font-family:var(--mono);font-size:.9em;background:rgba(13,20,36,.06);padding:1px 5px;border-radius:5px}
[data-theme="dark"] .doc-body code{background:rgba(255,255,255,.08)}
.doc-body blockquote{margin:20px 0;padding:6px 0 6px 20px;border-left:3px solid rgba(59,91,219,.5);color:var(--ink-2)}
.doc-body a{color:var(--accent);border-bottom:1px solid rgba(59,91,219,.3)}

/* ---------- 表单 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--ink-2);font-weight:600;margin:0 0 7px}
.field input[type=text],.field input[type=email],.field input[type=password],.field input[type=number],
.field input[type=file],.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--glass-border);border-radius:var(--radius-sm);
  font-size:14.5px;background:rgba(255,255,255,.72);color:var(--ink);font-family:inherit;line-height:1.5;
}
[data-theme="dark"] .field input,[data-theme="dark"] .field select,[data-theme="dark"] .field textarea{background:rgba(255,255,255,.06)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(59,91,219,.55);box-shadow:0 0 0 4px rgba(59,91,219,.14);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.hint{font-size:12.5px;color:var(--ink-3);margin-top:6px}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:20px;padding:56px 0 40px;border-top:1px solid var(--line)}
.site-footer .cols{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;margin-bottom:38px}
.site-footer h4{margin:0 0 14px;font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.site-footer a{display:block;color:var(--ink-2);font-size:13.5px;padding:4px 0}
.site-footer a:hover{color:var(--ink)}
.site-footer .bottom{
  border-top:1px solid var(--line-2);padding-top:22px;color:var(--ink-3);font-size:12.5px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-family:var(--mono);
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;list-style:none;padding:22px 2px;font-size:15.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0;padding:0 2px 24px;color:var(--ink-2);font-size:14.5px;line-height:1.88;max-width:72ch}

/* ---------- 响应式 ---------- */
@media(max-width:1080px){
  :root{--section-y:84px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento .b-wide{grid-column:span 2}
  .grid.c4{grid-template-columns:repeat(2,1fr)}
  .grid.c3{grid-template-columns:repeat(2,1fr)}
  .doc-layout{grid-template-columns:220px minmax(0,1fr)}
}
@media(max-width:820px){
  .doc-layout{grid-template-columns:1fr}
  .doc-side{position:static;max-height:none}
}
@media(max-width:760px){
  :root{--section-y:64px;--gutter:16px}
  .site-header{padding:10px 0 0}
  .site-header .inner{border-radius:20px;padding:9px 14px}
  .nav{display:none}
  .nav.open{
    display:flex;flex-direction:column;align-items:stretch;position:absolute;top:calc(100% + 8px);left:16px;right:16px;
    background:rgba(255,255,255,.9);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
    border:1px solid var(--glass-border);border-radius:20px;padding:10px;gap:2px;
    box-shadow:0 18px 44px rgba(16,24,48,.16);
  }
  [data-theme="dark"] .nav.open{background:rgba(18,23,36,.94)}
  .menu-btn{display:inline-flex}
  .hero{padding:40px 0 56px}
  .hero .hero-panel{padding:26px 20px;border-radius:22px}
  .bento,.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}
  .bento .b-wide{grid-column:auto}
  .form-row{grid-template-columns:1fr}
  .site-footer .cols{grid-template-columns:1fr 1fr;gap:24px}
  .art-hero{padding:36px 0 22px;margin-bottom:26px}
}
@media(max-width:480px){
  .site-footer .cols{grid-template-columns:1fr}
}