/* ZipGlass site — tokens & layering follow docs/DESIGN.md (macOS 26 Tahoe, Liquid Glass) */
:root{
  /* Palette — DESIGN.md */
  --blue:#2563EB;          /* 文件蓝 */
  --bg:#F8FAFC;            /* 浅底 */
  --surface:#FFFFFF;       /* 内容层实体背景 */
  --text:#0F172A;          /* 正文 */
  --muted:#475569;         /* 次要文字 */
  --danger:#DC2626;        /* 错误红 */
  --ok:#15803d;
  --okbg:#dcfce7;
  --border:rgba(15,23,42,.09);
  --radius:20px;
  --shadow:0 20px 60px rgba(15,23,42,.10);
  --max:1120px;
  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:48px; --s6:64px; /* 8pt grid */
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(800px 400px at 15% -5%, #dbeafe 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 10%, #e0e7ff 0%, transparent 60%),
    var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
.container{max-width:var(--max);margin:0 auto;padding:0 var(--s3)}

/* ---- Glass ONLY on nav / control layer (DESIGN.md hard rule) ---- */
.nav{position:sticky;top:12px;z-index:50;margin:12px auto 0;max-width:var(--max)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 10px 10px 18px;
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(22px) saturate(1.6);
  -webkit-backdrop-filter:blur(22px) saturate(1.6);
  border:1px solid var(--border);border-radius:999px;
  box-shadow:0 8px 32px rgba(15,23,42,.08);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px;text-decoration:none}
.logo{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:#fff;font-weight:900;
  background:linear-gradient(135deg,#2563EB,#1d4ed8);
  box-shadow:0 6px 18px rgba(37,99,235,.35);
}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{text-decoration:none;font-size:14px;color:#334155;padding:8px 14px;border-radius:999px}
.nav-links a:hover{background:rgba(15,23,42,.06);color:var(--text)}
.nav-links a.active{background:var(--text);color:#fff}
/* Solid buttons inside glass — no stacked glass */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:12px 22px;font-weight:700;font-size:15px;
  text-decoration:none;border:1px solid transparent;cursor:pointer;transition:.2s;
}
.btn-primary{background:var(--text);color:#fff;box-shadow:0 10px 24px rgba(15,23,42,.25)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.35)}
.btn-blue:hover{transform:translateY(-1px)}
.btn-solid{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn-solid:hover{border-color:#cbd5e1}

.hero{padding:var(--s6) 0 var(--s4);text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:#334155;
  background:rgba(255,255,255,.75);border:1px solid var(--border);
  padding:7px 14px;border-radius:999px;backdrop-filter:blur(10px);
}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:#f59e0b;box-shadow:0 0 0 6px rgba(245,158,11,.18);display:inline-block}
h1{font-size:clamp(36px,6vw,64px);line-height:1.1;letter-spacing:-.03em;margin:22px 0 16px;font-weight:800}
h1 .grad{color:var(--blue)}
.sub{color:var(--muted);font-size:clamp(15px,2vw,18px);max-width:700px;margin:0 auto}
.hero-cta{display:flex;gap:12px;justify-content:center;margin:28px 0 14px;flex-wrap:wrap}
.mini{font-size:13px;color:var(--muted)}

/* ---- App mock: titlebar/drag/progress = control layer (glass ok); lists = content (solid) ---- */
.mock{
  margin:36px auto 0;max-width:920px;text-align:left;
  background:var(--surface);border:1px solid var(--border);
  border-radius:22px;box-shadow:var(--shadow);overflow:hidden;
}
.titlebar{
  display:flex;align-items:center;gap:8px;padding:14px 18px;
  border-bottom:1px solid var(--border);
  background:rgba(248,250,252,.8);backdrop-filter:blur(14px);
}
.dot{width:12px;height:12px;border-radius:50%}
.mock-body{display:grid;grid-template-columns:260px 1fr;min-height:360px}
.side{border-right:1px solid var(--border);padding:18px;background:var(--surface)}
.side-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;font-size:14px;color:#334155;margin-bottom:6px}
.side-item.on{background:var(--text);color:#fff}
.main{padding:22px;background:var(--surface)}
/* 拖放卡片：regular glass，可交互；悬停/演示态才用 accent 着色 */
.drop{
  border:1.5px dashed rgba(37,99,235,.45);border-radius:16px;padding:28px;text-align:center;
  background:rgba(37,99,235,.06);backdrop-filter:blur(8px);
}
/* 进度胶囊 + 取消/计数放同一容器（对应 GlassEffectContainer 语义） */
.capsule-row{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);border-radius:999px;padding:8px 8px 8px 16px;margin-top:12px;font-size:14px}
.capsule-row .bar{height:8px;background:#e2e8f0;border-radius:99px;overflow:hidden;flex:1;min-width:80px}
.capsule-row .bar span{display:block;height:100%;background:var(--blue);border-radius:99px}
.pillbtn{border:1px solid var(--border);background:#f1f5f9;border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700;white-space:nowrap}
.taskline{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:12px 14px;margin-top:12px;font-size:14px}
/* 状态：图标 + 文字，不只用颜色 */
.st{display:inline-flex;align-items:center;gap:6px;font-weight:800;font-size:13px;padding:3px 10px;border-radius:99px;white-space:nowrap}
.st-ok{background:var(--okbg);color:var(--ok)}
.st-wait{background:#fef3c7;color:#92400e}
.st-err{background:#fee2e2;color:var(--danger)}
.st-info{background:#dbeafe;color:#1d4ed8}

.grid{display:grid;gap:var(--s2)}
.grid.cols3{grid-template-columns:repeat(3,1fr)}
.grid.cols2{grid-template-columns:repeat(2,1fr)}
.section{padding:var(--s5) 0}
.section h2{font-size:clamp(26px,4vw,38px);letter-spacing:-.02em;line-height:1.25;margin:0 0 10px;text-align:center}
.section p.lead{text-align:center;color:var(--muted);max-width:720px;margin:0 auto 28px}
/* 内容层卡片：实体背景，不用玻璃 */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:var(--s3)}
.card h3{margin:12px 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:20px;background:#eff6ff;border:1px solid #dbeafe}
/* 格式徽章：实体浅底胶囊 */
.fbadge{display:inline-block;background:#f1f5f9;border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:700;color:#334155}
.fbadge.hot{background:#dbeafe;border-color:#bfdbfe;color:#1d4ed8}
code.inline{background:var(--text);color:#e2e8f0;padding:2px 8px;border-radius:8px;font-size:13px}
table{width:100%;border-collapse:collapse;font-size:15px;background:var(--surface)}
th,td{padding:14px 16px;border-bottom:1px solid var(--border);text-align:left}
th{background:rgba(15,23,42,.04)}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px 18px;margin-bottom:10px}
.faq summary{font-weight:700;cursor:pointer}
.faq p{color:var(--muted);font-size:15px}
.soon{border-style:dashed;background:#fffbeb;border-color:#fcd34d}
.kv{display:grid;grid-template-columns:200px 1fr;gap:8px 16px;font-size:15px}
.kv dt{color:#334155;font-weight:700}
.kv dd{margin:0;color:var(--muted)}
.timeline{border-left:2px solid #e2e8f0;margin-left:8px;padding-left:20px}
.timeline div{margin-bottom:18px}
.timeline strong{display:block}
.cta{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 100%);color:#fff;border-radius:28px;padding:48px 32px;text-align:center}
.prose{max-width:880px;margin:0 auto}
.prose .card{margin-bottom:16px}
.prose h1{font-size:clamp(30px,5vw,46px);text-align:center}
.prose h2{font-size:21px;margin:0 0 10px;text-align:left}
.prose ul{color:var(--muted)}
.footer{padding:32px 0 48px;color:var(--muted);font-size:14px}
.footer-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;border-top:1px solid var(--border);padding-top:24px}
.footer a{color:#334155;text-decoration:none}
.footer a:hover{text-decoration:underline}
.lang{display:flex;gap:8px;align-items:center}
.lang button{border:1px solid var(--border);background:#fff;border-radius:99px;padding:6px 14px;font-size:13px;font-weight:700;cursor:pointer}
.lang button.on{background:var(--text);color:#fff}

/* ---- 无障碍兜底 (DESIGN.md: adaptiveGlassSurface / 减少动态效果) ---- */
@media (prefers-reduced-transparency: reduce){
  .nav-inner,.eyebrow,.titlebar,.drop{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{transition:none !important}
}
@media(max-width:860px){
  .grid.cols3,.grid.cols2{grid-template-columns:1fr}
  .mock-body{grid-template-columns:1fr}
  .side{display:none}
  .nav-links a.hide-m{display:none}
  .kv{grid-template-columns:1fr}
}