/* ============================================================
   DocFlow Hub · 样式表（专业 / 高级感 / 全端自适应 / 暗色主题）
   ============================================================ */
:root {
  --bg: #f5f7fb;
  --bg-soft: #eef2f9;
  --surface: #ffffff;
  --surface-2: #fafbff;
  --ink: #0e1726;
  --ink-soft: #51607a;
  --ink-faint: #93a0b8;
  --primary: #4f46e5;
  --primary-2: #7c3aed;
  --accent: #0ea5e9;
  --grad: linear-gradient(135deg, #6366f1 0%, #4f46e5 45%, #7c3aed 100%);
  --grad-soft: linear-gradient(135deg, #eef2ff, #f5f3ff);
  --border: #e6eaf2;
  --border-strong: #d3dae8;
  --success: #16a34a;
  --danger: #dc2626;
  --warn: #d97706;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px -12px rgba(31, 41, 90, 0.18);
  --shadow-lg: 0 24px 60px -20px rgba(31, 41, 90, 0.30);
  --maxw: 1180px;
  --nav-h: 64px;
}

/* ---------------- 暗色主题 ---------------- */
[data-theme="dark"] {
  --bg: #0c1018;
  --bg-soft: #141a26;
  --surface: #161c2a;
  --surface-2: #1b2233;
  --ink: #e8edf7;
  --ink-soft: #aab4cb;
  --ink-faint: #72809b;
  --primary: #818cf8;
  --primary-2: #a78bfa;
  --accent: #38bdf8;
  --grad: linear-gradient(135deg, #818cf8 0%, #6366f1 45%, #a855f7 100%);
  --grad-soft: linear-gradient(135deg, #1e2540, #241d3f);
  --border: #283146;
  --border-strong: #36425c;
  --success: #34d399;
  --danger: #f87171;
  --warn: #fbbf24;
  --shadow: 0 12px 34px -14px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 28px 70px -22px rgba(0, 0, 0, 0.7);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .35s ease, color .35s ease;
}
a { color: inherit; text-decoration: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--ink-soft); }
.center { text-align: center; }

/* ---------------- 顶部导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.nav.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: -0.3px; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 10px; background: var(--grad);
  display: grid; place-items: center; color: #fff; box-shadow: var(--shadow);
}
.brand .logo svg { width: 20px; height: 20px; }
.brand small { font-weight: 600; color: var(--ink-faint); font-size: 12px; margin-left: 2px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 14px; border-radius: 10px; font-weight: 600; font-size: 14px;
  color: var(--ink-soft); transition: .18s;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--ink); }

.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--ink); cursor: pointer; }
.nav-toggle svg { width: 22px; height: 22px; }

.theme-toggle { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--ink); cursor: pointer; display: grid; place-items: center;
  position: relative; transition: .2s; }
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }
.theme-toggle svg { width: 20px; height: 20px; position: absolute; transition: opacity .25s, transform .35s; }
.theme-toggle .ic-moon { opacity: 0; transform: rotate(-40deg) scale(.6); }
[data-theme="dark"] .theme-toggle .ic-sun { opacity: 0; transform: rotate(40deg) scale(.6); }
[data-theme="dark"] .theme-toggle .ic-moon { opacity: 1; transform: none; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  border: none; font-weight: 700; font-size: 14px; padding: 11px 20px;
  border-radius: 12px; transition: .2s; font-family: inherit;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--border-strong); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn:focus-visible, .theme-toggle:focus-visible, .nav-toggle:focus-visible,
.field select:focus-visible, .field input:focus-visible, .toggle:focus-visible {
  outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 35%, transparent);
}

/* ---------------- Hero ---------------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 56px; }
.blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5; z-index: 0; }
.blob.b1 { width: 420px; height: 420px; background: #c7d2fe; top: -120px; right: -60px; }
.blob.b2 { width: 360px; height: 360px; background: #ddd6fe; bottom: -140px; left: -80px; }
[data-theme="dark"] .blob.b1 { background: #3730a3; opacity: .35; }
[data-theme="dark"] .blob.b2 { background: #6d28d9; opacity: .3; }
.hero-inner { position: relative; z-index: 1; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border-radius: 999px; background: var(--grad-soft); border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent);
  color: var(--primary); font-weight: 700; font-size: 13px; margin-bottom: 18px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 15%, transparent); }
h1.title { font-size: clamp(30px, 5vw, 52px); line-height: 1.1; margin: 0 0 18px; letter-spacing: -1.2px; font-weight: 850; }
h1.title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(15px, 2vw, 19px); color: var(--ink-soft); max-width: 640px; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 30px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats .s { display: flex; flex-direction: column; }
.hero-stats .s b { font-size: 26px; font-weight: 850; letter-spacing: -0.5px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .s span { font-size: 13px; color: var(--ink-faint); }

/* 漂浮格式芯片（装饰） */
.hero-orbit { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.float-chip {
  position: absolute; padding: 7px 14px; border-radius: 999px; font-weight: 800; font-size: 13px;
  background: var(--surface); border: 1px solid var(--border); color: var(--primary);
  box-shadow: var(--shadow); opacity: .9;
  animation: floaty 7s ease-in-out infinite;
}
.float-chip.fc1 { top: 12%; left: 6%; animation-delay: 0s; }
.float-chip.fc2 { top: 22%; right: 10%; animation-delay: 1.1s; }
.float-chip.fc3 { top: 54%; left: 3%; animation-delay: 2.2s; }
.float-chip.fc4 { bottom: 16%; right: 7%; animation-delay: .6s; }
.float-chip.fc5 { top: 66%; right: 16%; animation-delay: 1.7s; }
.float-chip.fc6 { top: 8%; right: 30%; animation-delay: 2.8s; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---------------- 转换工作台 ---------------- */
.workbench {
  margin: -36px auto 0; position: relative; z-index: 5;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 22px; box-shadow: var(--shadow-lg); padding: 26px;
  animation: rise .6s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
.wb-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.wb-head h2 { font-size: 19px; margin: 0; letter-spacing: -0.3px; }
.wb-head .tag { font-size: 12px; color: var(--ink-faint); font-weight: 600; }

.drop {
  border: 2px dashed var(--border-strong); border-radius: var(--radius);
  padding: 34px 20px; text-align: center; transition: .2s; cursor: pointer;
  background: var(--surface-2); position: relative; overflow: hidden;
}
.drop:hover, .drop.drag { border-color: var(--primary); background: var(--grad-soft); transform: translateY(-2px); }
.drop.drag::after {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius);
  background: radial-gradient(circle at center, color-mix(in srgb, var(--primary) 10%, transparent), transparent 70%);
}
.drop .ic { width: 52px; height: 52px; margin: 0 auto 12px; border-radius: 14px;
  background: var(--grad); display: grid; place-items: center; color: #fff; box-shadow: var(--shadow);
  animation: bob 3.5s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.drop .ic svg { width: 26px; height: 26px; }
.drop strong { display: block; font-size: 16px; }
.drop span { font-size: 13px; color: var(--ink-faint); }

.filelist { margin-top: 14px; display: none; flex-direction: column; gap: 8px; }
.filelist.show { display: flex; animation: fadein .3s ease; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.fchip {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; font-size: 14px;
  animation: rise .35s ease both;
}
.fchip .ext { font-size: 11px; font-weight: 800; padding: 3px 8px; border-radius: 6px;
  background: var(--grad); color: #fff; text-transform: uppercase; }
.fchip .nm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fchip .sz { color: var(--ink-faint); font-size: 12px; }
.fchip .x { cursor: pointer; color: var(--ink-faint); font-weight: 800; padding: 0 4px; }
.fchip .x:hover { color: var(--danger); }

.wb-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: end; margin-top: 16px; }
.field label { display: block; font-size: 13px; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; }
.field select, .field input {
  width: 100%; padding: 11px 12px; border-radius: 11px; border: 1px solid var(--border-strong);
  background: var(--surface); font-size: 14px; color: var(--ink); font-family: inherit; transition: .18s;
}
.field select:focus, .field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent); }
.swap {
  width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--border-strong);
  background: var(--surface); display: grid; place-items: center; cursor: pointer; color: var(--primary);
  align-self: end; transition: .2s;
}
.swap:hover { background: var(--grad-soft); border-color: var(--primary); transform: rotate(180deg); }
.swap svg { width: 20px; height: 20px; }

.opts { margin-top: 14px; padding: 14px; border: 1px dashed var(--border-strong); border-radius: 12px; background: var(--surface-2); display: none; flex-direction: column; gap: 12px; }
.opts.show { display: flex; animation: fadein .3s ease; }
.opts .opt-row { display: flex; gap: 14px; flex-wrap: wrap; }
.opts .opt-row > div { flex: 1; min-width: 150px; }
.hint { margin-top: 12px; font-size: 13px; padding: 10px 14px; border-radius: 10px; display: none; animation: fadein .25s ease; }
.hint.show { display: block; }
.hint.warn { background: color-mix(in srgb, var(--warn) 12%, var(--surface)); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); }
.hint.ok { background: color-mix(in srgb, var(--success) 12%, var(--surface)); color: var(--success); border: 1px solid color-mix(in srgb, var(--success) 30%, transparent); }
.hint.err { background: color-mix(in srgb, var(--danger) 12%, var(--surface)); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }

.wb-actions { display: flex; gap: 12px; margin-top: 18px; align-items: center; }
.spinner { width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.5); border-top-color: #fff; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.progress { flex: 1; height: 8px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; display: none; }
.progress.show { display: block; }
.progress > i { display: block; height: 100%; width: 0; background: var(--grad); border-radius: 999px;
  transition: width .3s; background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
@keyframes shimmer { 0% { background-position: 0 0; } 100% { background-position: 200% 0; }
  background-image: linear-gradient(90deg, var(--primary) 0%, var(--primary-2) 50%, var(--primary) 100%); }

.result {
  margin-top: 16px; padding: 16px; border-radius: 14px; display: none;
  background: var(--grad-soft); border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent); align-items: center; gap: 14px;
  animation: pop .35s cubic-bezier(.2,.8,.2,1) both;
}
@keyframes pop { from { opacity: 0; transform: scale(.96); } to { opacity: 1; transform: none; } }
.result.show { display: flex; }
.result .meta { flex: 1; }
.result .meta b { font-size: 15px; }
.result .meta span { display: block; font-size: 12.5px; color: var(--ink-soft); }

/* ---------------- 区块标题 ---------------- */
.section { padding: 60px 0; }
.section.sm { padding: 40px 0; }
.sec-head { text-align: center; max-width: 680px; margin: 0 auto 38px; }
.sec-head .kicker { color: var(--primary); font-weight: 800; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; }
.sec-head h2 { font-size: clamp(24px, 3.5vw, 34px); margin: 10px 0 12px; letter-spacing: -0.8px; }
.sec-head p { color: var(--ink-soft); font-size: 16px; margin: 0; }

/* ---------------- 功能卡片 ---------------- */
.grid { display: grid; gap: 18px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: .22s; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
  background: var(--grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }
.card .ci { width: 46px; height: 46px; border-radius: 13px; background: var(--grad-soft);
  display: grid; place-items: center; color: var(--primary); margin-bottom: 14px; transition: .22s; }
.card:hover .ci { transform: scale(1.06) rotate(-3deg); }
.card .ci svg { width: 24px; height: 24px; }
.card h3 { margin: 0 0 8px; font-size: 17px; letter-spacing: -0.3px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.card .pill { position: absolute; top: 18px; right: 18px; font-size: 11px; font-weight: 700;
  padding: 4px 9px; border-radius: 999px; background: var(--grad-soft); color: var(--primary); }

/* ---------------- 格式流 ---------------- */
.flow { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.flow .pair { display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; font-weight: 700; font-size: 14px; transition: .2s; }
.flow .pair:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.flow .pair .arrow { color: var(--primary); }
.flow .pair .fx { padding: 3px 9px; border-radius: 7px; background: var(--grad); color: #fff; font-size: 12px; }

/* ---------------- 矩阵表 ---------------- */
.matrix-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table.matrix { border-collapse: collapse; width: 100%; font-size: 13px; min-width: 760px; }
table.matrix th, table.matrix td { border: 1px solid var(--border); padding: 9px 10px; text-align: center; transition: background .15s; }
table.matrix th { background: var(--bg-soft); font-weight: 800; position: sticky; top: 0; }
table.matrix td.rowh { font-weight: 800; background: var(--bg-soft); text-align: left; position: sticky; left: 0; }
table.matrix tbody tr:hover td { background: color-mix(in srgb, var(--primary) 8%, var(--surface)); }
table.matrix .yes { color: var(--success); font-weight: 800; }
table.matrix .no { color: var(--ink-faint); }
table.matrix .self { color: var(--ink-faint); font-weight: 700; }

/* ---------------- 步骤 ---------------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { text-align: center; padding: 24px 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); transition: .22s; }
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step .n { width: 40px; height: 40px; margin: 0 auto 12px; border-radius: 50%; background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 850; }
.step h4 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* ---------------- 页脚 ---------------- */
.footer { border-top: 1px solid var(--border); background: var(--surface); padding: 40px 0 30px; margin-top: 30px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.footer .col h5 { margin: 0 0 12px; font-size: 14px; }
.footer .col a { display: block; color: var(--ink-soft); font-size: 13.5px; padding: 4px 0; }
.footer .col a:hover { color: var(--primary); }
.footer .copy { text-align: center; color: var(--ink-faint); font-size: 13px; margin-top: 26px; }

/* ---------------- 后台 ---------------- */
.admin-wrap { max-width: 1080px; margin: 30px auto; }
.login-card { max-width: 400px; margin: 70px auto; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 34px; box-shadow: var(--shadow-lg); }
.login-card h2 { margin: 0 0 6px; text-align: center; }
.login-card p { text-align: center; color: var(--ink-soft); margin: 0 0 22px; }
.login-card .field { margin-bottom: 14px; }
.admin-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 12px; }
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 26px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 18px; position: relative; overflow: hidden; }
.stat-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--grad); }
.stat-card b { font-size: 28px; font-weight: 850; display: block; letter-spacing: -0.5px; }
.stat-card span { color: var(--ink-faint); font-size: 13px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin-bottom: 22px; }
.panel h3 { margin: 0 0 16px; font-size: 17px; }
table.admin-tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.admin-tbl th, table.admin-tbl td { padding: 11px 12px; border-bottom: 1px solid var(--border); text-align: left; }
table.admin-tbl th { color: var(--ink-soft); font-weight: 700; }
.status-pill { display: inline-block; white-space: nowrap; font-size: 11px; font-weight: 800; padding: 3px 9px; border-radius: 999px; }
.status-pill.on { background: color-mix(in srgb, var(--success) 14%, transparent); color: var(--success); }
.status-pill.off { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
.status-pill.disabled { background: var(--bg-soft); color: var(--ink-faint); }
.toggle { cursor: pointer; white-space: nowrap; padding: 6px 14px; border-radius: 9px; border: 1px solid var(--border-strong); background: var(--surface); font-weight: 700; font-size: 12.5px; transition: .18s; }
.toggle:hover { border-color: var(--primary); color: var(--primary); }
.log-row { display: flex; gap: 12px; padding: 9px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.log-row .t { color: var(--ink-faint); font-variant-numeric: tabular-nums; }
.log-row .ok { color: var(--success); font-weight: 800; }
.log-row .fail { color: var(--danger); font-weight: 800; }
.flash { background: color-mix(in srgb, var(--danger) 12%, var(--surface)); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); padding: 10px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 14px; }

/* 后台：转换器使用条形（纯 CSS） */
.bars { display: flex; flex-direction: column; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 140px 1fr 44px; align-items: center; gap: 10px; font-size: 13px; }
.bar-track { height: 10px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--grad); border-radius: 999px; width: 0; transition: width .8s ease; }

/* ---------------- 滚动揭示动画 ---------------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
  .grid.c3, .grid.c4 { grid-template-columns: repeat(2, 1fr); }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    position: absolute; top: var(--nav-h); right: 12px; left: 12px;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
    padding: 10px; box-shadow: var(--shadow-lg);
    opacity: 0; transform: translateY(-10px); pointer-events: none; transition: .2s;
  }
  .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 12px 14px; }
  .theme-toggle { width: 100%; justify-content: center; }
  .wb-row { grid-template-columns: 1fr; }
  .swap { transform: rotate(90deg); justify-self: center; }
  .hero { padding: 48px 0 40px; }
  .workbench { padding: 18px; }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .section { padding: 44px 0; }
  .hero-orbit { display: none; }
}
@media (max-width: 460px) {
  .brand small { display: none; }
  .container { padding: 0 14px; }
  .workbench { border-radius: 16px; }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ================= 会员 / 微信 / 后台扩展 ================= */

/* 导航：会员态 */
.nav-user { display: inline-flex; flex-direction: column; line-height: 1.15; padding: 0 4px; color: var(--ink); font-weight: 700; font-size: 13px; }
.nav-user small { font-size: 10.5px; color: var(--primary); font-weight: 800; }

/* 微信按钮 */
.btn-wechat { background: #07c160; color: #fff; border: none; }
.btn-wechat:hover { background: #06ad56; transform: translateY(-1px); }
.divider { display: flex; align-items: center; text-align: center; color: var(--ink-faint); font-size: 12px; margin: 6px 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.divider span { padding: 0 10px; }

/* 通用标签（会员等级“当前”等） */
.pill { display: inline-block; font-size: 11px; font-weight: 800; padding: 3px 9px; border-radius: 999px; background: var(--bg-soft); color: var(--ink-soft); }
.pill.on { background: color-mix(in srgb, var(--primary) 16%, transparent); color: var(--primary); }

/* 后台子导航 */
.admin-subnav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.admin-subnav a { padding: 8px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); font-size: 13.5px; font-weight: 700; color: var(--ink-soft); }
.admin-subnav a:hover { border-color: var(--primary); color: var(--primary); }

/* 会员中心：等级卡片 */
.tier-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; display: flex; flex-direction: column; }
.tier-card.current { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent); }
.tier-head { display: flex; align-items: center; justify-content: space-between; }
.tier-head b { font-size: 16px; }
.tier-price { font-size: 22px; font-weight: 800; margin: 10px 0; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.tier-auth { display: inline-block; font-size: 13px; font-weight: 700; margin: 10px 0 4px; padding: 3px 12px; border-radius: 999px; background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); border: 1px solid color-mix(in srgb, var(--primary) 28%, transparent); }
.tier-list { list-style: none; padding: 0; margin: 6px 0 16px; font-size: 13px; color: var(--ink-soft); }
.tier-list li { padding: 5px 0; border-bottom: 1px dashed var(--border); }

/* 会员表格操作区 */
table.admin-tbl td.ops { white-space: nowrap; }
.toggle.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.toggle.danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); border-color: var(--danger); }

/* 会员 / 后台表单优化 */
.login-card .field input, .panel .field input, .panel .field select {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--card); color: var(--ink); font-size: 14px;
}
.login-card .field input:focus, .panel .field input:focus, .panel .field select:focus {
  border-color: var(--primary); outline: none;
}

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 10px; max-width: 820px; margin: 0 auto; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 4px 16px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--primary); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 14px; color: var(--ink-soft); font-size: 14px; line-height: 1.7; }

/* 合规页脚 / 备案展示 */
.footer .copy .filing { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; justify-content: center; font-size: 13px; }
.footer .copy .filing a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px dashed color-mix(in srgb, var(--ink-soft) 50%, transparent); }
.footer .copy .filing a:hover { color: var(--primary); }
.badge-nonbiz { font-size: 11.5px; padding: 2px 9px; border-radius: 999px; background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent); }

/* 法律文书页 */
.legal-wrap { max-width: 860px; padding: 40px 20px 64px; }
.legal-doc { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 32px 36px; }
.legal-doc h1 { margin: 0 0 4px; font-size: 28px; }
.legal-doc h2 { margin: 28px 0 10px; font-size: 19px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.legal-doc p, .legal-doc li { line-height: 1.8; color: var(--ink-soft); font-size: 14.5px; }
.legal-doc ul { padding-left: 22px; margin: 8px 0 14px; }
.legal-doc li { margin: 4px 0; }
.legal-doc code { background: var(--card); padding: 2px 6px; border-radius: 6px; border: 1px solid var(--border); font-size: 13px; }
.legal-updated { color: var(--muted); font-size: 13px; margin-top: 0; }
.legal-summary { background: color-mix(in srgb, var(--primary) 8%, var(--surface)); border: 1px solid color-mix(in srgb, var(--primary) 25%, var(--border)); border-radius: 12px; padding: 14px 18px; margin: 18px 0 8px; line-height: 1.75; font-size: 14.5px; color: var(--ink-soft); }

/* 注册同意勾选 */
.login-card .agree { display: flex; align-items: flex-start; gap: 8px; font-size: 12.5px; color: var(--ink-soft); margin: 10px 0 4px; line-height: 1.5; }
.login-card .agree input { margin-top: 3px; }
.login-card .agree a { color: var(--primary); text-decoration: none; }

/* textarea 通用（社群发帖 / 评论 / 举报） */
.field textarea, .panel textarea, .comment-form textarea, .modal textarea {
  width: 100%; box-sizing: border-box; padding: 11px 13px; border-radius: 11px;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--ink);
  font: inherit; font-size: 14px; resize: vertical; line-height: 1.6;
}
.field textarea:focus, .panel textarea:focus, .modal textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
}

/* 社群：板块筛选 chips */
.community-cats { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 12px; }
.chip { font-size: 13px; font-weight: 700; padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--ink-soft); text-decoration: none; transition: .18s; }
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.on { background: var(--grad); color: #fff; border-color: transparent; }

/* 帖子列表 */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-item { display: flex; align-items: center; gap: 14px; padding: 14px 6px; border-bottom: 1px solid var(--border); }
.post-item:last-child { border-bottom: none; }
.post-main { flex: 1; min-width: 0; }
.post-title { display: block; font-size: 15.5px; font-weight: 700; color: var(--ink); text-decoration: none; }
.post-title:hover { color: var(--primary); }
.post-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 5px; font-size: 12.5px; color: var(--ink-faint); }
.post-go { font-size: 24px; color: var(--ink-faint); text-decoration: none; line-height: 1; }
.cat-badge, .pin { font-size: 11px; font-weight: 800; padding: 2px 8px; border-radius: 6px; }
.cat-badge { background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); }
.pin { background: color-mix(in srgb, var(--warn, #f59e0b) 16%, transparent); color: #b45309; margin-left: 6px; }
.pager { display: flex; align-items: center; justify-content: center; gap: 16px; margin: 18px 0; font-size: 13.5px; }
.pager a { color: var(--primary); text-decoration: none; }

.community-rules { margin-top: 22px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 4px 16px; }
.community-rules summary { cursor: pointer; font-weight: 700; padding: 12px 0; list-style: none; }
.community-rules summary::-webkit-details-marker { display: none; }
.community-rules ul { margin: 0 0 14px; padding-left: 20px; color: var(--ink-soft); font-size: 13.5px; line-height: 1.8; }

/* 帖子详情 */
.back-link { display: inline-block; color: var(--primary); text-decoration: none; font-size: 13.5px; margin: 4px 0; }
.post-detail .post-head { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.post-detail-title { margin: 0 0 8px; font-size: 24px; line-height: 1.35; }
.post-body { white-space: pre-wrap; line-height: 1.8; color: var(--ink-soft); font-size: 15px; margin: 12px 0 18px; }
.post-actions { border-top: 1px solid var(--border); padding-top: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* 评论 */
.comment-list { list-style: none; margin: 6px 0 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.comment-item { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; }
.comment-head { display: flex; gap: 10px; align-items: baseline; margin-bottom: 4px; }
.comment-body { white-space: pre-wrap; line-height: 1.7; color: var(--ink-soft); font-size: 14px; }
.comment-actions { margin-top: 6px; }
.comment-form { margin-bottom: 14px; }

/* 举报弹窗 */
.modal { position: fixed; inset: 0; background: rgba(15, 18, 32, .5); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 20px; }
.modal[hidden] { display: none; }
.modal-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px; width: 100%; max-width: 440px; box-shadow: var(--shadow-lg); }
.modal-card h3 { margin: 0 0 6px; }