/* ==========================================================================
   甄房OS 产品官网 — 设计系统
   品牌蓝 #0070F2 / 深墨 #0B1420 / 品牌金 #C6A15B
   ========================================================================== */

:root {
  --brand: #0070f2;
  --brand-600: #0064d9;
  --brand-700: #0055b8;
  --brand-50: #eaf3ff;
  --brand-100: #d6e7ff;
  --ink: #0b1420;
  --graphite: #1f2d3d;
  --muted: #556b82;
  --muted-2: #7a8ca0;
  --line: #e5e7eb;
  --line-strong: #d5dae1;
  --paper: #f5f6f7;
  --paper-2: #f8fafc;
  --white: #ffffff;
  --gold: #c6a15b;
  --gold-soft: #f6efe2;
  --green: #256f3a;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(11, 20, 32, 0.06);
  --shadow: 0 8px 30px rgba(11, 20, 32, 0.07);
  --shadow-lg: 0 24px 70px rgba(11, 20, 32, 0.14);
  --container: 1200px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Inter, Arial, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--graphite);
  background: var(--white);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font-family: inherit; }
::selection { background: var(--brand-100); color: var(--ink); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -100px; left: 16px; z-index: 200;
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 8px;
}
.skip-link:focus { top: 12px; }

/* ---------- 通用文本 ---------- */
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  color: var(--brand); text-transform: uppercase;
}
.kicker::before {
  content: ""; width: 18px; height: 2px; background: var(--brand); border-radius: 2px;
}
.kicker--light { color: #8dc0ff; }
.kicker--light::before { background: #8dc0ff; }

.display {
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink);
}
.display em { font-style: normal; color: var(--brand); }

h2.section-title {
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 700;
  color: var(--ink);
}
h3.block-title {
  font-size: 21px; line-height: 1.4; font-weight: 650; color: var(--ink);
}
.lead {
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.8;
  color: var(--muted);
}
.body-sm { font-size: 14px; line-height: 1.75; color: var(--muted); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 15px; font-weight: 600; line-height: 1;
  cursor: pointer; white-space: nowrap;
  transition: transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px rgba(0, 112, 242, .22); }
.btn-primary:hover { background: var(--brand-600); box-shadow: 0 10px 24px rgba(0, 112, 242, .28); }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--brand); color: var(--brand); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #17283c; }
.btn-light { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.28); backdrop-filter: blur(6px); }
.btn-light:hover { background: rgba(255,255,255,.18); }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; border-radius: 8px; }
.btn .arrow { transition: transform .18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.text-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; color: var(--brand); font-size: 15px;
}
.text-link:hover { color: var(--brand-700); }
.text-link .arrow { transition: transform .18s ease; }
.text-link:hover .arrow { transform: translateX(3px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(11, 20, 32, .05);
}
.header-inner {
  height: 68px; display: flex; align-items: center; gap: 34px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.logo-mark {
  width: 32px; height: 32px; flex: none;
  display: grid; place-items: center;
}
.logo-mark img { width: 100%; height: 100%; object-fit: contain; display: block; }
.logo-text { font-size: 19px; font-weight: 700; letter-spacing: -0.01em; color: var(--ink); }
.logo-text span { color: var(--brand); }

.nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 10px 13px; border-radius: 8px;
  font-size: 14.5px; font-weight: 500; color: var(--graphite);
  transition: color .15s ease, background .15s ease;
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--brand); background: var(--brand-50); }
.nav-link .chev { transition: transform .2s ease; opacity: .55; }
.nav-item:hover .chev { transform: rotate(180deg); }

.dropdown-panel {
  position: absolute; top: calc(100% + 10px); left: -12px;
  width: 520px; padding: 12px;
  background: #fff; border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow-lg);
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.nav-item:hover .dropdown-panel,
.nav-item:focus-within .dropdown-panel { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-item {
  display: block; padding: 11px 12px; border-radius: 10px;
  transition: background .15s ease;
}
.dropdown-item:hover { background: var(--paper); }
.dropdown-item strong { display: block; font-size: 14px; color: var(--ink); font-weight: 600; }
.dropdown-item small { display: block; font-size: 12.5px; color: var(--muted); margin-top: 2px; }

.header-cta { display: flex; align-items: center; gap: 10px; flex: none; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  background: #fff; border-radius: 10px; cursor: pointer; padding: 0;
  place-items: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--ink);
  color: #fff;
  padding: 92px 0 84px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(900px 480px at 78% 8%, rgba(0, 112, 242, .38), transparent 62%),
    radial-gradient(620px 420px at 4% 92%, rgba(0, 112, 242, .16), transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.7), transparent 72%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid {
  display: grid; grid-template-columns: 1.06fr .94fr;
  gap: 56px; align-items: center;
}
.hero .display { color: #fff; }
.hero .display em { color: #6fb2ff; }
.hero .lead { color: rgba(255, 255, 255, .72); max-width: 540px; margin-top: 22px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-note {
  margin-top: 18px; font-size: 13px; color: rgba(255,255,255,.5);
  display: flex; align-items: center; gap: 8px;
}
.hero-note svg { flex: none; }

.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 11px; border-radius: 999px;
  font-size: 12.5px; font-weight: 500;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  color: rgba(255,255,255,.82);
}
.tag--light { background: var(--paper); border-color: var(--line); color: var(--muted); }
.tag--brand { background: var(--brand-50); border-color: var(--brand-100); color: var(--brand-700); }
.tag--gold { background: var(--gold-soft); border-color: #eadcc0; color: #8a6a2f; }

/* Hero 产品界面示意 */
.product-mock {
  position: relative;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(180deg, rgba(255,255,255,.1), rgba(255,255,255,.03));
  box-shadow: 0 40px 90px rgba(0,0,0,.45);
  overflow: hidden;
  transform: perspective(1400px) rotateY(-5deg) rotateX(2deg);
}
.mock-top {
  height: 36px; display: flex; align-items: center; gap: 6px;
  padding: 0 14px; border-bottom: 1px solid rgba(255,255,255,.1);
  background: rgba(255,255,255,.05);
}
.mock-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.25); }
.mock-title { margin-left: 10px; font-size: 11px; color: rgba(255,255,255,.5); letter-spacing: .04em; }
.mock-body {
  display: grid; grid-template-columns: 52px 1fr; min-height: 316px;
  background: #0f1b2b;
}
.mock-side {
  border-right: 1px solid rgba(255,255,255,.08);
  padding: 14px 0; display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.mock-side i {
  width: 22px; height: 22px; border-radius: 6px; background: rgba(255,255,255,.1); display: block;
}
.mock-side i:first-child { background: var(--brand); box-shadow: 0 0 0 4px rgba(0,112,242,.18); }
.mock-main { padding: 16px 18px; }
.mock-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.mock-h { font-size: 13px; font-weight: 600; color: #fff; }
.mock-pill { font-size: 10px; color: #8dc0ff; background: rgba(0,112,242,.2); padding: 3px 8px; border-radius: 999px; }
.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.mock-kpi {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px; padding: 9px 10px;
}
.mock-kpi b { display: block; font-size: 17px; color: #fff; font-variant-numeric: tabular-nums; }
.mock-kpi small { font-size: 9.5px; color: rgba(255,255,255,.45); }
.mock-chart {
  height: 108px; border-radius: 8px; border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(0,112,242,.16), rgba(0,112,242,0));
  position: relative; overflow: hidden; margin-bottom: 12px;
}
.mock-chart svg { position: absolute; inset: auto 0 0 0; width: 100%; height: 78%; }
.mock-rows { display: grid; gap: 6px; }
.mock-row {
  display: grid; grid-template-columns: 1.5fr .8fr .8fr; gap: 8px;
  font-size: 10px; color: rgba(255,255,255,.55);
  padding: 7px 9px; border-radius: 6px; background: rgba(255,255,255,.035);
}
.mock-row b { color: rgba(255,255,255,.85); font-weight: 500; }
.mock-row .ok { color: #6ee7a8; }

/* ---------- 数据条 ---------- */
.metric-strip {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.metric-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 34px 0;
}
.metric { text-align: center; padding: 0 18px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric-value {
  font-size: clamp(28px, 2.6vw, 38px); font-weight: 700; color: var(--ink);
  letter-spacing: -0.02em; font-variant-numeric: tabular-nums; line-height: 1.1;
}
.metric-value span { font-size: .5em; color: var(--brand); margin-left: 2px; font-weight: 600; }
.metric-label { font-size: 13px; color: var(--muted); margin-top: 8px; }

/* ---------- 区块 ---------- */
.section { padding: 92px 0; }
.section--tight { padding: 68px 0; }
.section--paper { background: var(--paper); }
.section--ink { background: var(--ink); color: #fff; }
.section--ink h2.section-title { color: #fff; }
.section--ink .lead { color: rgba(255,255,255,.66); }
.section-head { max-width: 760px; }
.section-head .section-title { margin-top: 14px; }
.section-head .lead { margin-top: 16px; }
.section-head--center { margin: 0 auto; text-align: center; }
.section-head--center .kicker { justify-content: center; }
.section-head-row {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 44px;
}
.section-head-row .section-head { margin-bottom: 0; }

/* ---------- 网格与卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.card-icon {
  width: 42px; height: 42px; border-radius: 11px;
  display: grid; place-items: center;
  background: var(--brand-50); color: var(--brand);
  margin-bottom: 18px;
}
.card-icon svg { width: 21px; height: 21px; }
.card-title { font-size: 17px; font-weight: 650; color: var(--ink); line-height: 1.45; }
.card-desc { font-size: 14px; line-height: 1.75; color: var(--muted); margin-top: 9px; }
.card-list { margin-top: 16px; display: grid; gap: 8px; }
.card-list li {
  position: relative; padding-left: 16px; font-size: 13px; line-height: 1.6; color: var(--graphite);
}
.card-list li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--brand);
}
.card-foot { margin-top: 20px; }
.card--accent { border-color: var(--brand-100); background: linear-gradient(180deg, #fbfdff, #fff); }
.card--ink { background: var(--ink); border-color: #1b2c41; }
.card--ink .card-title { color: #fff; }
.card--ink .card-desc { color: rgba(255,255,255,.62); }
.card--ink .card-icon { background: rgba(0,112,242,.18); color: #7db4ff; }

/* ---------- 业务链路 ---------- */
.chain {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: #fff;
}
.chain-node {
  padding: 24px 20px 22px; position: relative;
  border-right: 1px solid var(--line);
  transition: background .2s ease;
}
.chain-node:last-child { border-right: 0; }
.chain-node:hover { background: var(--paper-2); }
.chain-node::after {
  content: ""; position: absolute; right: -7px; top: 50%; z-index: 2;
  width: 12px; height: 12px; border-top: 1px solid var(--line); border-right: 1px solid var(--line);
  background: #fff; transform: translateY(-50%) rotate(45deg);
}
.chain-node:last-child::after { display: none; }
.chain-index {
  font-size: 11px; font-weight: 700; letter-spacing: .1em; color: var(--brand);
  font-variant-numeric: tabular-nums;
}
.chain-name { font-size: 16px; font-weight: 650; color: var(--ink); margin-top: 8px; }
.chain-desc { font-size: 12.5px; line-height: 1.65; color: var(--muted); margin-top: 6px; }

/* ---------- 角色 Tab ---------- */
.role-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.role-tab {
  padding: 10px 18px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: #fff;
  font-size: 14px; font-weight: 550; color: var(--muted);
  transition: all .18s ease;
}
.role-tab:hover { border-color: var(--brand); color: var(--brand); }
.role-tab.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.role-panel { display: none; }
.role-panel.is-active { display: block; animation: fadeUp .3s ease; }
.role-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.check-list { display: grid; gap: 14px; margin-top: 24px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--graphite); }
.check-list .ic {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--brand-50); color: var(--brand);
  display: grid; place-items: center; margin-top: 2px;
}
.check-list .ic svg { width: 12px; height: 12px; }

/* ---------- 对比表 ---------- */
.table-wrap {
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow-x: auto; background: #fff;
}
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td {
  padding: 17px 20px; border-bottom: 1px solid var(--line);
  font-size: 14px; vertical-align: top;
}
.compare-table thead th {
  background: var(--paper); font-size: 13px; font-weight: 600; color: var(--muted);
  letter-spacing: .02em;
}
.compare-table thead th:nth-child(3) { color: var(--brand); }
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table tbody tr:hover { background: var(--paper-2); }
.compare-table .dim { font-weight: 600; color: var(--ink); width: 20%; }
.compare-table .old { color: var(--muted); width: 38%; }
.compare-table .new { color: var(--graphite); width: 42%; }
.compare-table .new strong { color: var(--brand); }
.compare-note { font-size: 12.5px; color: var(--muted-2); margin-top: 14px; }

/* ---------- 分割布局 ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.split--reverse .split-visual { order: -1; }
.split .section-title { margin-top: 14px; }
.split .lead { margin-top: 16px; }

/* 通用界面示意（浅色） */
.ui-mock {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow);
  overflow: hidden;
}
.ui-mock-top {
  height: 34px; display: flex; align-items: center; gap: 6px; padding: 0 14px;
  background: var(--paper); border-bottom: 1px solid var(--line);
}
.ui-mock-top i { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); display: block; }
.ui-mock-top span { margin-left: auto; font-size: 11px; color: var(--muted-2); }
.ui-mock-body { padding: 18px; }
.ui-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 12px; border-radius: 8px; background: var(--paper-2);
  font-size: 12.5px; color: var(--graphite); margin-bottom: 8px;
}
.ui-row b { font-weight: 600; color: var(--ink); }
.ui-row .status { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: #e8f7ee; color: var(--green); }
.ui-row .status--blue { background: var(--brand-50); color: var(--brand-700); }
.ui-row .status--gold { background: var(--gold-soft); color: #8a6a2f; }
.ui-bars { display: flex; align-items: flex-end; gap: 8px; height: 92px; margin: 14px 0 4px; }
.ui-bars i { flex: 1; border-radius: 4px 4px 0 0; background: var(--brand-100); }
.ui-bars i:nth-child(2n) { background: var(--brand); opacity: .85; }
.ui-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.ui-kpi { background: var(--paper-2); border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
.ui-kpi b { display: block; font-size: 18px; color: var(--ink); font-variant-numeric: tabular-nums; }
.ui-kpi small { font-size: 10.5px; color: var(--muted); }

/* ---------- 数字/步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding-top: 26px; border-top: 2px solid var(--line); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: -13px; left: 0;
  background: #fff; padding-right: 12px;
  font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .06em;
}
.step-title { font-size: 16px; font-weight: 650; color: var(--ink); }
.step-desc { font-size: 13.5px; line-height: 1.7; color: var(--muted); margin-top: 8px; }

/* ---------- 引用 ---------- */
.quote-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px; display: flex; flex-direction: column; gap: 18px;
}
.quote-mark { color: var(--brand-100); font-size: 44px; line-height: 1; font-family: Georgia, serif; }
.quote-text { font-size: 15px; line-height: 1.8; color: var(--graphite); }
.quote-meta { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--brand-50); color: var(--brand);
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
}
.quote-meta strong { display: block; font-size: 13.5px; color: var(--ink); font-weight: 600; }
.quote-meta small { display: block; font-size: 12px; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 0 20px; transition: border-color .18s ease;
}
.faq details[open] { border-color: var(--brand-100); }
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 0;
  font-size: 15.5px; font-weight: 600; color: var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-size: 20px; color: var(--muted-2); font-weight: 400; line-height: 1;
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); color: var(--brand); }
.faq .faq-body { padding: 0 0 18px; font-size: 14px; line-height: 1.8; color: var(--muted); }

/* ---------- CTA ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #06101c 0%, #0b1e33 48%, #093a72 100%);
  color: #fff; border-radius: var(--radius-lg);
  padding: 64px 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 48px;
}
.cta-band::after {
  content: ""; position: absolute; right: -120px; top: -140px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,112,242,.5), transparent 68%);
}
.cta-band > * { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(26px, 3vw, 38px); line-height: 1.25; font-weight: 700; letter-spacing: -0.015em; }
.cta-band p { color: rgba(255,255,255,.66); margin-top: 12px; font-size: 15px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; flex: none; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #07111d; color: rgba(255,255,255,.62);
  padding: 66px 0 30px; font-size: 13.5px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 36px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.09);
}
.footer-brand .logo-text { color: #fff; }
.footer-brand p { margin-top: 16px; max-width: 280px; line-height: 1.8; color: rgba(255,255,255,.45); }
.footer-col h4 { font-size: 13px; color: #fff; font-weight: 600; margin-bottom: 16px; letter-spacing: .02em; }
.footer-col a { display: block; padding: 6px 0; color: rgba(255,255,255,.55); transition: color .15s ease; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding-top: 26px; font-size: 12.5px; color: rgba(255,255,255,.36);
}

/* ---------- 内页 Hero ---------- */
.page-hero {
  background: var(--ink); color: #fff; padding: 58px 0 64px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(760px 360px at 85% 0%, rgba(0,112,242,.32), transparent 65%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 12.5px; color: rgba(255,255,255,.45); margin-bottom: 22px;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { color: rgba(255,255,255,.25); }
.page-hero h1 {
  font-size: clamp(30px, 3.6vw, 46px); line-height: 1.2;
  letter-spacing: -0.018em; font-weight: 700; color: #fff;
}
.page-hero .lead { color: rgba(255,255,255,.68); max-width: 720px; margin-top: 16px; }
.page-hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }

/* 模块页侧栏 */
.module-layout {
  display: grid; grid-template-columns: 232px 1fr; gap: 56px; align-items: start;
}
.module-aside { position: sticky; top: 92px; }
.module-aside h4 {
  font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted-2); margin-bottom: 12px;
}
.module-nav { display: grid; gap: 2px; }
.module-nav a {
  display: block; padding: 9px 12px; border-radius: 8px;
  font-size: 14px; color: var(--muted); border-left: 2px solid transparent;
}
.module-nav a:hover { background: var(--paper); color: var(--ink); }
.module-nav a.is-active {
  background: var(--brand-50); color: var(--brand-700); font-weight: 600;
  border-left-color: var(--brand);
}
.aside-cta {
  margin-top: 26px; padding: 18px; border-radius: 12px;
  background: var(--paper); border: 1px solid var(--line);
}
.aside-cta p { font-size: 13px; line-height: 1.65; color: var(--muted); }
.aside-cta .btn { width: 100%; margin-top: 14px; }

/* 模块页内容 */
.module-section { padding: 54px 0; border-bottom: 1px solid var(--line); }
.module-section:first-child { padding-top: 0; }
.module-section:last-child { border-bottom: 0; }
.module-section h2 {
  font-size: 26px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em;
}
.module-section > p.lead { font-size: 15.5px; margin-top: 12px; }

.feature-rows { display: grid; gap: 14px; margin-top: 28px; }
.feature-row {
  display: grid; grid-template-columns: 44px 1fr; gap: 18px;
  padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: #fff;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.feature-row:hover { border-color: var(--brand-100); box-shadow: var(--shadow-sm); }
.feature-row .num {
  width: 36px; height: 36px; border-radius: 9px; background: var(--brand-50);
  color: var(--brand); display: grid; place-items: center;
  font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.feature-row h3 { font-size: 16px; font-weight: 650; color: var(--ink); }
.feature-row p { font-size: 13.5px; line-height: 1.75; color: var(--muted); margin-top: 6px; }
.feature-row .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

.value-box {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px;
}
.value-item {
  padding: 18px; border-radius: 12px; background: var(--paper-2); border: 1px solid var(--line);
}
.value-item b { display: block; font-size: 20px; color: var(--brand); font-variant-numeric: tabular-nums; }
.value-item span { display: block; font-size: 12.5px; color: var(--muted); margin-top: 6px; line-height: 1.6; }

/* ---------- 表单 ---------- */
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 38px; box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 600; color: var(--graphite); }
.field label .req { color: #c0392b; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line-strong); border-radius: 9px;
  font-family: inherit; font-size: 14px; color: var(--ink); background: #fff;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(0,112,242,.12);
}
.form-note { font-size: 12.5px; color: var(--muted-2); margin-top: 16px; line-height: 1.7; }
.form-success {
  display: none; margin-top: 18px; padding: 14px 16px; border-radius: 10px;
  background: #e8f7ee; color: var(--green); font-size: 14px; font-weight: 500;
}
.form-success.is-visible { display: block; }

.contact-panel {
  background: var(--ink); color: #fff; border-radius: var(--radius-lg);
  padding: 38px; position: relative; overflow: hidden;
}
.contact-panel::after {
  content: ""; position: absolute; right: -80px; bottom: -100px;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,112,242,.42), transparent 70%);
}
.contact-panel > * { position: relative; z-index: 2; }
.contact-list { display: grid; gap: 16px; margin-top: 26px; }
.contact-list li { display: flex; gap: 12px; font-size: 14px; color: rgba(255,255,255,.72); }
.contact-list .ic {
  flex: none; width: 34px; height: 34px; border-radius: 9px;
  background: rgba(255,255,255,.08); color: #8dc0ff; display: grid; place-items: center;
}
.contact-list b { display: block; color: #fff; font-weight: 600; font-size: 13px; margin-bottom: 2px; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .06s; }
.reveal-delay-2 { transition-delay: .12s; }
.reveal-delay-3 { transition-delay: .18s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .product-mock { transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .product-mock { transform: none; max-width: 620px; }
  .module-layout { grid-template-columns: 200px 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1.4fr repeat(2, 1fr); row-gap: 32px; }
}

@media (max-width: 900px) {
  .section { padding: 68px 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .chain { grid-template-columns: repeat(2, 1fr); }
  .chain-node { border-bottom: 1px solid var(--line); }
  .chain-node::after { display: none; }
  .chain-node:nth-child(2n) { border-right: 0; }
  .chain-node:last-child { grid-column: 1 / -1; border-bottom: 0; }
  .split, .role-layout { grid-template-columns: 1fr; gap: 34px; }
  .split--reverse .split-visual { order: 0; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 44px 34px; }
  .module-layout { grid-template-columns: 1fr; }
  .module-aside { position: static; display: none; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(1), .metric:nth-child(2) { border-bottom: 1px solid var(--line); padding-bottom: 24px; }

  /* 移动端导航 */
  .nav-toggle { display: grid; }
  .header-cta { margin-left: auto; }
  .header-cta .btn { display: none; }
  .nav {
    position: fixed; inset: 68px 0 auto 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px 20px 22px; max-height: calc(100vh - 68px); overflow-y: auto;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav-link { padding: 13px 8px; font-size: 15px; justify-content: space-between; }
  .dropdown-panel {
    position: static; width: auto; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: 0; border-radius: 0; padding: 0 0 8px 10px;
    display: none; grid-template-columns: 1fr;
  }
  .nav-item.is-open .dropdown-panel { display: grid; }
  .nav-item:hover .dropdown-panel { display: none; }
  .nav-item.is-open:hover .dropdown-panel { display: grid; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .header-inner { height: 62px; gap: 12px; }
  .nav { inset: 62px 0 auto 0; }
  .logo-text { font-size: 17px; }
  .hero { padding: 60px 0 56px; }
  .hero-actions .btn { width: 100%; }
  .hero-actions { gap: 10px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .section-head-row { flex-direction: column; align-items: flex-start; }
  .cta-band { padding: 36px 24px; border-radius: 16px; }
  .cta-actions { width: 100%; flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .form-card { padding: 24px 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .value-box { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .compare-table th, .compare-table td { padding: 13px 12px; font-size: 12.5px; }
  .compare-table .dim { width: 26%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .chain { grid-template-columns: 1fr; }
  .chain-node { border-right: 0; }
  .chain-node:last-child { grid-column: auto; }
  .role-tab { padding: 8px 14px; font-size: 13px; }
  .page-hero { padding: 40px 0 46px; }
  .module-section { padding: 40px 0; }
  .feature-row { grid-template-columns: 1fr; gap: 12px; padding: 18px; }
}