/* =========================================================
   盾隐浏览器官网 · 全局样式 v1.0
   颜色规范（沿用 APP 的 Slate + Indigo 10 色阶）
   ========================================================= */
:root {
  /* 主色：Indigo */
  --indigo-50:  #eef2ff;
  --indigo-100: #e0e7ff;
  --indigo-200: #c7d2fe;
  --indigo-300: #a5b4fc;
  --indigo-400: #818cf8;
  --indigo-500: #6366f1;
  --indigo-600: #4f46e5;
  --indigo-700: #4338ca;
  --indigo-800: #3730a3;
  --indigo-900: #312e81;

  /* 次色：Violet */
  --violet-50:  #f5f3ff;
  --violet-100: #ede9fe;
  --violet-200: #ddd6fe;
  --violet-300: #c4b5fd;
  --violet-400: #a78bfa;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;
  --violet-700: #6d28d9;

  /* 中性：Slate  */
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  /* 语义色 */
  --emerald-500:#10b981;
  --amber-500:  #f59e0b;
  --rose-500:   #f43f5e;
  --fuchsia-500:#d946ef;

  /* 全局语义变量 */
  --bg:          #ffffff;
  --bg-alt:      var(--slate-50);
  --bg-hero:     linear-gradient(135deg, #eef2ff 0%, #f5f3ff 45%, #fdf4ff 100%);
  --text:        var(--slate-800);
  --text-soft:   var(--slate-600);
  --text-muted:  var(--slate-500);
  --border:      var(--slate-200);
  --border-soft: var(--slate-100);

  --primary:     var(--indigo-600);
  --primary-h:   var(--indigo-700);
  --primary-s:   var(--indigo-500);
  --primary-txt: #ffffff;
  --primary-50:  var(--indigo-50);
  --primary-100: var(--indigo-100);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 10px 28px -14px rgba(15,23,42,.18), 0 4px 10px -4px rgba(79,70,229,.08);
  --shadow-lg: 0 28px 60px -28px rgba(79,70,229,.35), 0 14px 28px -18px rgba(139,92,246,.3);

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Roboto, Arial, sans-serif;

  --container: 1200px;
  --nav-h: 68px;
}

* { box-sizing: border-box; }
html, body { margin:0; padding:0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--primary); }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 920px; }
.row { display: flex; flex-wrap: wrap; gap: 20px; }
.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 { width: 100%; }
@media(min-width: 768px){
  .col-6 { width: calc(50% - 10px); }
  .col-4 { width: calc(33.333% - 14px); }
  .col-3 { width: calc(25% - 15px); }
  .col-8 { width: calc(66.666% - 7px); }
}

/* ================================
   顶部导航
================================ */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.site-nav .nav-inner {
  height: var(--nav-h);
  display: flex; align-items: center; gap: 32px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 800; font-size: 20px; color: var(--slate-900);
  letter-spacing: -0.02em;
}
.brand-badge {
  width: 38px; height: 38px; border-radius: 12px;
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-500));
  color: #fff; font-weight: 800; font-size: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 18px -8px rgba(79,70,229,.55);
  letter-spacing: -0.01em;
}
.nav-links {
  display: none;
  flex: 1; align-items: center; gap: 4px;
}
@media(min-width: 960px){
  .nav-links { display: inline-flex; }
}
.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-xs);
  color: var(--text-soft);
  font-size: 14.5px; font-weight: 500;
}
.nav-links a.active,
.nav-links a:hover {
  background: var(--primary-50);
  color: var(--primary);
}
.nav-cta {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 10px;
}

/* ================================
   通用按钮
================================ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  transition: all .18s ease;
  white-space: nowrap;
  cursor: pointer;
}
.btn.btn-primary {
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-600));
  color: #fff;
  box-shadow: 0 10px 24px -14px rgba(79,70,229,.75);
}
.btn.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 32px -16px rgba(124,58,237,.8);
}
.btn.btn-ghost {
  background: var(--slate-50);
  color: var(--slate-700);
  border-color: var(--border);
}
.btn.btn-ghost:hover {
  background: var(--slate-100);
  color: var(--primary);
  border-color: var(--primary-100);
}
.btn.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: var(--primary-100);
}
.btn.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-200);
}
.btn.btn-lg { padding: 15px 28px; border-radius: 14px; font-size: 16px; }
.btn.btn-icon .ic { width: 20px; height: 20px; flex: 0 0 auto; }

/* ================================
   Hero 首屏
================================ */
.hero {
  background: var(--bg-hero);
  position: relative; overflow: hidden;
  padding: 86px 0 96px;
}
.hero::before,
.hero::after {
  content:""; position: absolute; border-radius: 50%;
  filter: blur(70px); opacity: .55; pointer-events: none;
}
.hero::before {
  width: 420px; height: 420px;
  background: radial-gradient(closest-side, #818cf8, transparent);
  left: -120px; top: -120px;
}
.hero::after {
  width: 480px; height: 480px;
  background: radial-gradient(closest-side, #c084fc, transparent);
  right: -160px; top: 60px;
}
.hero-inner { position: relative; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.75);
  border: 1px solid var(--primary-100);
  color: var(--primary); font-size: 13px; font-weight: 600;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--emerald-500);
  box-shadow: 0 0 0 4px rgba(16,185,129,.15);
}
.hero-title {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.12; font-weight: 800; letter-spacing: -0.03em;
  color: var(--slate-900);
  margin: 0 0 20px;
}
.hero-title .grad {
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-600));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subtitle {
  color: var(--text-soft);
  font-size: 18px; max-width: 660px; margin: 0 0 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta {
  margin-top: 28px; display: flex; gap: 24px; flex-wrap: wrap;
  color: var(--text-muted); font-size: 14px;
}
.hero-meta b { color: var(--slate-700); }

.hero-card {
  border-radius: 24px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.6);
  box-shadow: var(--shadow-lg);
  padding: 18px;
  backdrop-filter: blur(18px);
}
.hero-card .screen-header {
  display: flex; align-items: center; gap: 8px; padding: 8px 4px 16px;
}
.hero-card .dot3 { width: 10px; height: 10px; border-radius: 50%; }
.hero-card .dot3.r { background:#f87171; }
.hero-card .dot3.y { background:#fbbf24; }
.hero-card .dot3.g { background:#34d399; }
.hero-card .screen-body {
  border-radius: 16px; background: var(--slate-50);
  border: 1px solid var(--border);
  overflow: hidden;
  aspect-ratio: 9 / 16;
  display: grid; grid-template-rows: 56px 1fr 72px;
}
.hero-card .mobile-top {
  padding: 0 14px; display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-600));
  color: #fff; font-weight: 700; font-size: 14px;
}
.hero-card .mobile-main {
  padding: 16px; display: grid; gap: 12px;
  background: linear-gradient(180deg, #eef2ff 0%, #fdf4ff 100%);
}
.hero-card .fp-chip {
  height: 44px; border-radius: 12px; background:#fff; border:1px solid var(--border);
  display: grid; grid-template-columns: 14px 1fr auto; align-items: center; gap: 10px;
  padding: 0 12px; font-size: 12px; color: var(--slate-600);
}
.hero-card .fp-chip .sw { width:14px; height:14px; border-radius: 4px; }
.hero-card .mobile-nav {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background:#fff; border-top: 1px solid var(--border);
}
.hero-card .mobile-nav .nav-item {
  display: grid; place-items: center; color: var(--slate-500); font-size: 11px;
}
.hero-card .mobile-nav .nav-item.active { color: var(--primary); font-weight: 700; }

/* ================================
   Section 通用
================================ */
section { padding: 96px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-kicker {
  display: inline-block;
  padding: 6px 14px; border-radius: 999px;
  background: var(--primary-50);
  color: var(--primary); font-weight: 600; font-size: 13px;
  margin-bottom: 14px;
  letter-spacing: .02em;
}
.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--slate-900);
  margin: 0 0 14px;
}
.section-sub {
  font-size: 17px; color: var(--text-soft); max-width: 720px; margin: 0 auto;
}

/* ================================
   三卡核心卖点 / 下载大按钮（通用卡片）
================================ */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all .22s ease;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-100);
}
.card .card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 20px; color: #fff;
}
.card .card-icon.indigo { background: linear-gradient(135deg, var(--indigo-500), var(--indigo-700)); }
.card .card-icon.violet { background: linear-gradient(135deg, var(--violet-500), var(--violet-700)); }
.card .card-icon.amber  { background: linear-gradient(135deg, #f59e0b, #d97706); }
.card .card-icon.fuchsia{ background: linear-gradient(135deg, var(--fuchsia-500), #a21caf); }
.card .card-icon.emerald{ background: linear-gradient(135deg, var(--emerald-500), #047857); }
.card .card-icon.rose   { background: linear-gradient(135deg, var(--rose-500), #be123c); }
.card h3 {
  font-size: 20px; margin: 0 0 10px;
  color: var(--slate-900); letter-spacing: -0.015em;
}
.card p { color: var(--text-soft); margin: 0; font-size: 15px; }

/* ================================
   指纹特性矩阵
================================ */
.fp-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media(min-width: 780px){ .fp-grid { grid-template-columns: repeat(2, 1fr); } }
@media(min-width: 1100px){ .fp-grid { grid-template-columns: repeat(3, 1fr); } }
.fp-card {
  background: #fff; border: 1px solid var(--border); border-radius: 18px;
  padding: 26px 24px;
}
.fp-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.fp-bar {
  width: 4px; height: 28px; border-radius: 4px;
}
.fp-bar.indigo  { background: var(--indigo-500); }
.fp-bar.violet  { background: var(--violet-500); }
.fp-bar.fuchsia { background: var(--fuchsia-500); }
.fp-bar.amber   { background: var(--amber-500); }
.fp-bar.emerald { background: var(--emerald-500); }
.fp-bar.rose    { background: var(--rose-500); }
.fp-head h3 { margin: 0; font-size: 17px; color: var(--slate-900); }
.fp-list { margin: 0; padding: 0; list-style: none; }
.fp-list li {
  padding: 11px 0;
  border-bottom: 1px dashed var(--border-soft);
  display: grid;
  grid-template-columns: 145px 1fr; gap: 14px;
  align-items: start;
}
.fp-list li:last-child { border-bottom: none; padding-bottom: 0; }
.fp-list .k {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12.5px;
  color: var(--primary);
  background: var(--primary-50);
  padding: 3px 8px;
  border-radius: 6px;
  display: inline-block;
  word-break: break-all;
}
.fp-list .v { font-size: 14px; color: var(--text-soft); }

/* ================================
   FAQ 手风琴
================================ */
.faq-wrap { max-width: 880px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-q {
  width: 100%; padding: 18px 24px;
  text-align: left;
  font-size: 16px; font-weight: 600; color: var(--slate-800);
  background: transparent; border: none;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
.faq-q:hover { background: var(--slate-50); }
.faq-q .chev {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary-50);
  color: var(--primary);
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform .2s ease;
  flex: 0 0 auto;
}
.faq-item.open .faq-q .chev { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .3s ease;
  color: var(--text-soft);
}
.faq-item.open .faq-a { max-height: 600px; }
.faq-a-inner { padding: 0 24px 20px; border-top: 1px solid var(--border-soft); padding-top: 16px; }

/* ================================
   CTA 条（下载中心大条）
================================ */
.cta-band {
  background: linear-gradient(135deg, var(--indigo-700) 0%, var(--violet-700) 100%);
  color: #fff;
  border-radius: 28px;
  padding: 56px;
  box-shadow: var(--shadow-lg);
  position: relative; overflow: hidden;
}
.cta-band::after {
  content:""; position: absolute;
  right:-120px; bottom:-120px; width: 420px; height: 420px;
  border-radius:50%;
  background: radial-gradient(closest-side, rgba(255,255,255,.2), transparent);
}
.cta-band h2 {
  font-size: clamp(26px, 3vw, 36px); margin: 0 0 12px; font-weight: 800; letter-spacing: -0.02em;
}
.cta-band p { margin: 0 0 24px; opacity: .85; max-width: 640px; }
.cta-band .btns { display: flex; flex-wrap: wrap; gap: 14px; position: relative; z-index: 1; }
.cta-band .btn-ghost-light {
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.28);
  color: #fff;
}
.cta-band .btn-ghost-light:hover { background: rgba(255,255,255,.22); }

/* ================================
   下载页 · 平台卡片
================================ */
.dl-grid {
  display: grid; gap: 20px;
  grid-template-columns: 1fr;
}
@media(min-width: 820px){ .dl-grid { grid-template-columns: repeat(2, 1fr); } }
@media(min-width: 1180px){ .dl-grid { grid-template-columns: repeat(4, 1fr); } }
.dl-card {
  background: #fff; border: 1px solid var(--border); border-radius: 20px;
  padding: 24px; display: flex; flex-direction: column; gap: 16px;
  transition: all .2s ease;
  position: relative; overflow: hidden;
}
.dl-card::before {
  content:""; position: absolute; top: 0; left: 0; width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--indigo-500), var(--violet-500));
  opacity: 0; transition: opacity .2s ease;
}
.dl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-100); }
.dl-card:hover::before { opacity: 1; }
.dl-card .plat-head {
  display: flex; align-items: center; gap: 14px;
}
.dl-card .plat-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--primary-50);
  color: var(--primary);
  display: inline-flex; align-items: center; justify-content: center;
}
.dl-card .plat-icon.win { background: #eaf6ff; color:#0ea5e9; }
.dl-card .plat-icon.android { background: #ecfdf5; color:var(--emerald-500); }
.dl-card .plat-icon.mac { background: #f8fafc; color: var(--slate-700); }
.dl-card .plat-icon.lin { background: #fef3c7; color:#b45309; }
.dl-card h3 { margin: 0; font-size: 18px; color: var(--slate-900); }
.dl-card .tag {
  display: inline-block; font-size: 12px; padding: 2px 10px; border-radius: 999px;
  background: var(--primary-50); color: var(--primary); font-weight: 600;
}
.dl-card .tag.rec { background: linear-gradient(135deg, #dcfce7, #eef2ff); color: var(--primary); }
.dl-card .plat-body { color: var(--text-soft); font-size: 14px; }
.dl-card .plat-meta {
  display: flex; gap: 16px; color: var(--text-muted); font-size: 13px; flex-wrap: wrap;
}
.dl-card .plat-meta b { color: var(--slate-700); }
.dl-card .dl-action { margin-top: auto; }

/* ===== 下载页主区：介绍文字整行独立（不并排） + 下方 2 个元素（卡片）并排 = 「APK 下载卡 ↔ 二维码」仅这 2 元素并排 ===== */

/* 介绍文字段：整行占满，不参与并排，用户点名『文字不并排，只要二维码元素与 APK 卡并排』*/
.dl-intro-head {
  width: 100%;
  margin-bottom: 32px;
}

/* 2 卡片并排（APK 卡 + 二维码）— 默认手机端 1 列，PC 强制 2 列 + 兜底 768px */
.dl-row-cards {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
  align-items: stretch; /* 两卡片等高，视觉底部平齐 */
}
/* 内部占位元素 (dl-platforms / qr-wrap) 100% 撑满列 */
.dl-card-left > .dl-grid { grid-template-columns: 1fr; }
.dl-card-right > .qr-wrap {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}
/* PC: 强制 2 列并排 56px gap（不看窗口大小）*/
.device-pc .dl-row-cards,
.dl-row-cards.force-2-cols {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
}
/* 手机端：单列顺序 = 先二维码（扫一扫顺手）→ 再 APK 下载卡（兜底点按钮），介绍文字在最上方 */
.device-mobile .dl-row-cards {
  grid-template-areas: "qrcode" "download";
  gap: 28px;
}
.device-mobile .dl-row-cards > .dl-card-left { grid-area: download; }
.device-mobile .dl-row-cards > .dl-card-right { grid-area: qrcode; }
.device-mobile .dl-intro-head { text-align: center; }
.device-mobile .dl-intro-head .section-head { text-align: center !important; }
.device-mobile .dl-intro-head .section-head h2,
.device-mobile .dl-intro-head .section-head p { text-align: center !important; }
.device-mobile .dl-intro-head .section-head .section-kicker { display: inline-block; }
.device-mobile .dl-card-right > .qr-wrap { width: 96%; max-width: 360px; }

/* 兜底：>=768px （禁用 JS 也生效 2 列并排）*/
@media(min-width: 768px){
  .dl-row-cards { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; }
}
@media(max-width: 767px){
  .dl-row-cards {
    grid-template-areas: "qrcode" "download";
    gap: 28px;
  }
  .dl-row-cards > .dl-card-left { grid-area: download; }
  .dl-row-cards > .dl-card-right { grid-area: qrcode; }
  .dl-intro-head { text-align: center; }
  .dl-intro-head .section-head { text-align: center !important; }
  .dl-intro-head .section-head h2,
  .dl-intro-head .section-head p { text-align: center !important; }
  .dl-intro-head .section-head .section-kicker { display: inline-block; }
}

/* ================================
   二维码
================================ */
.qr-wrap {
  background: #fff; border: 1px solid var(--border); border-radius: 22px;
  padding: 30px; display: flex; flex-direction: column; align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}
.qr-wrap h4 { margin: 0; font-size: 16px; color: var(--slate-800); }
.qr-svg { width: 200px; height: 200px; border-radius: 14px; padding: 10px; background: #fff; border: 1px solid var(--border); }
.qr-caption { color: var(--text-muted); font-size: 13.5px; text-align: center; }

/* ================================
   更新日志
================================ */
.cl-list { border-left: 2px dashed var(--border); padding-left: 28px; margin-left: 10px; }
.cl-item { position: relative; margin-bottom: 32px; }
.cl-item:last-child { margin-bottom: 0; }
.cl-item::before {
  content:""; position: absolute;
  width: 14px; height: 14px; border-radius: 50%;
  left: -37px; top: 5px;
  background: linear-gradient(135deg, var(--indigo-500), var(--violet-500));
  box-shadow: 0 0 0 4px var(--primary-50);
}
.cl-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cl-ver { font-weight: 800; color: var(--slate-900); font-size: 17px; }
.cl-date { color: var(--text-muted); font-size: 14px; }
.cl-tag {
  padding: 3px 10px; border-radius: 999px;
  background: linear-gradient(135deg, var(--indigo-50), var(--violet-50));
  color: var(--primary); font-size: 12px; font-weight: 600;
  border: 1px solid var(--primary-100);
}
.cl-items { margin: 10px 0 0; padding-left: 22px; color: var(--text-soft); }
.cl-items li { padding: 3px 0; font-size: 15px; }

/* ================================
   归档表
================================ */
.table-wrap {
  overflow-x: auto;
  background: #fff; border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}
table.archives {
  width: 100%; min-width: 720px; border-collapse: collapse;
}
table.archives th, table.archives td {
  padding: 16px 22px; text-align: left; font-size: 14.5px;
  border-bottom: 1px solid var(--border-soft);
}
table.archives th {
  background: var(--slate-50); color: var(--text-soft); font-weight: 600;
}
table.archives tr:last-child td { border-bottom: none; }
table.archives td code {
  background: var(--slate-50); padding: 2px 8px; border-radius: 6px;
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px;
}

/* ================================
   面包屑
================================ */
.crumbs {
  padding: 24px 0 8px;
  color: var(--text-muted); font-size: 14px;
}
.crumbs a { color: var(--primary); }
.crumbs .sep { margin: 0 10px; color: var(--slate-400); }

/* ================================
   Footer
================================ */
.footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 72px 0 28px;
  margin-top: 64px;
}
.footer a { color: var(--slate-300); }
.footer a:hover { color: var(--indigo-300); }
.footer .brand { color: #fff; }
.footer .f-groups {
  display: grid; gap: 36px;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(148,163,184,.15);
}
@media(max-width: 960px){ .footer .f-groups { grid-template-columns: 1fr 1fr; } }
@media(max-width: 620px){ .footer .f-groups { grid-template-columns: 1fr; } }
.footer h5 {
  color: #fff; font-size: 14px; margin: 0 0 14px;
  letter-spacing: .04em; text-transform: uppercase;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { padding: 5px 0; font-size: 14.5px; }
.footer .brand-desc {
  color: var(--slate-400); max-width: 360px; margin: 12px 0 18px; font-size: 14.5px;
}
.footer .socials { display: flex; gap: 10px; flex-wrap: wrap; }
.footer .socials a {
  width: 36px; height: 36px; border-radius: 10px;
  background: rgba(148,163,184,.12);
  color: var(--slate-300);
  display: inline-flex; align-items: center; justify-content: center;
}
.footer .socials a:hover {
  background: linear-gradient(135deg, var(--indigo-600), var(--violet-600));
  color: #fff;
}
.footer-bottom {
  padding-top: 24px; display: flex; gap: 18px; flex-wrap: wrap;
  justify-content: space-between; font-size: 13.5px;
  color: var(--slate-500);
}

/* ================================
   响应式补漏
================================ */
@media(max-width: 600px){
  section { padding: 64px 0; }
  .hero { padding: 56px 0 64px; }
  .cta-band { padding: 32px 24px; border-radius: 20px; }
  .btn.btn-lg { padding: 13px 22px; }
}