/* ============================================================
   Pony VPN 官网 — 全站样式
   风格：杂志编辑式排版 / 宽松留白 / 大卡片 / 主色 #3858e9
   支持：亮色 & 暗色双模式
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --primary: #3858e9;
  --primary-strong: #2a44c8;
  --primary-tint: rgba(56, 88, 233, 0.08);
  --primary-tint-2: rgba(56, 88, 233, 0.14);

  --bg: #f5f7fc;
  --bg-soft: #edf1f9;
  --surface: #ffffff;
  --surface-2: #f2f5fb;

  --text: #16203c;
  --text-2: #47527a;
  --text-3: #7b86a8;

  --border: #e3e9f5;
  --border-strong: #d2dcf0;

  /* 扁平化设计：去除全部阴影，层次由边框 + 背景色差承担 */
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 36px;

  --container: 1200px;
  --header-h: 72px;

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --primary: #6f92f5;
  --primary-strong: #8ba9f8;
  --primary-tint: rgba(111, 146, 245, 0.12);
  --primary-tint-2: rgba(111, 146, 245, 0.2);

  --bg: #0a1020;
  --bg-soft: #0e1628;
  --surface: #111a30;
  --surface-2: #16223c;

  --text: #eaf0fc;
  --text-2: #a8b6d6;
  --text-3: #7887ad;

  --border: #22304e;
  --border-strong: #2e3f66;

  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand img { height: 34px; width: auto; }
.brand .brand-dark { display: none; }
[data-theme="dark"] .brand .brand-light { display: none; }
[data-theme="dark"] .brand .brand-dark { display: block; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover { color: var(--text); background: var(--surface-2); }

.site-nav a.active {
  color: var(--primary);
  background: var(--primary-tint);
  font-weight: 600;
}

.header-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}
.theme-toggle:hover { color: var(--primary); border-color: var(--primary); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; }

.header-cta {
  padding: 9px 20px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 999px;
  transition: transform 0.2s ease;
}
.header-cta:hover { transform: translateY(-1px); }

/* ---------- 通用区块 ---------- */
.section { padding: 104px 0; }
.section--tight { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-2);
  max-width: 640px;
}

.section-head { margin-bottom: 56px; }
.section-head--center { text-align: center; }
.section-head--center .section-desc { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font);
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; flex-shrink: 0; }

.btn--primary {
  background: var(--primary);
  color: #fff;
}
.btn--primary:hover { background: var(--primary-strong); transform: translateY(-2px); }

.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

.btn--light {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
}
.btn--light:hover { background: rgba(255, 255, 255, 0.24); transform: translateY(-2px); }

.btn--lg { padding: 16px 34px; font-size: 16px; }
.btn--block { width: 100%; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 104px;
  background:
    radial-gradient(900px 480px at 88% -10%, var(--primary-tint-2), transparent 62%),
    radial-gradient(700px 420px at -8% 108%, var(--primary-tint), transparent 60%),
    var(--bg);
}

.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 26px;
  box-shadow: var(--shadow-sm);
}
.hero-eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.18);
}

.hero-title {
  font-size: clamp(38px, 5.4vw, 62px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -1.5px;
  margin-bottom: 22px;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(100deg, var(--primary), #7aa2ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-2);
  max-width: 520px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}
.hero-meta .meta-item { display: flex; flex-direction: column; gap: 2px; }
.hero-meta .meta-num {
  font-family: var(--font-en);
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}
.hero-meta .meta-label { font-size: 13px; color: var(--text-3); }

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-visual img {
  width: 100%;
  max-width: 620px;
}

/* ---------- 数据条 ---------- */
.stats-band { padding: 0; }
.stats-band .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transform: translateY(-46px);
  margin-bottom: -46px;
}
.stat-cell {
  background: var(--surface);
  padding: 34px 28px;
  text-align: center;
}
.stat-num {
  font-family: var(--font-en);
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-label { font-size: 14px; color: var(--text-2); }

/* ---------- 图标网格（一键加速） ---------- */
.social-strip {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 18px;
  margin-top: 48px;
}
.social-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 12px 16px;
  text-align: center;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.social-cell:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.social-cell img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  margin: 0 auto 12px;
}
.social-cell span { font-size: 13px; color: var(--text-2); font-weight: 500; }

/* ---------- 特性双卡 ---------- */
.duo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.feature-card img {
  width: 92px;
  height: 92px;
  object-fit: contain;
  margin-bottom: 26px;
}
.feature-card h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
}
.feature-card p { font-size: 16px; color: var(--text-2); }

/* ---------- 优势网格 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease;
  position: relative;
  overflow: hidden;
}
.adv-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 180px; height: 180px;
  background: radial-gradient(circle, var(--primary-tint), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.adv-card:hover::after { opacity: 1; }
.adv-icon {
  width: 60px; height: 60px;
  border-radius: 18px;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.adv-icon svg { width: 28px; height: 28px; }
.adv-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.adv-card p { font-size: 15px; color: var(--text-2); position: relative; z-index: 1; }

/* ---------- 免费策略注记（精选摘要捕获段） ---------- */
.free-note {
  max-width: 760px;
  margin: 0 auto 40px;
  font-size: 16.5px;
  color: var(--text-2);
  line-height: 1.9;
  text-align: center;
}
.free-note a { color: var(--primary); font-weight: 600; text-decoration: none; border-bottom: 1px solid var(--primary-tint-2); }
.free-note a:hover { border-bottom-color: var(--primary); }

/* ---------- 截图展示 ---------- */
.shots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: end;
}
.shot-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease;
}
.shot-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.shot-card img {
  width: 100%;
  max-width: 260px;
  margin: 0 auto 24px;
  border-radius: 20px;
}
.shot-card h3 { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.shot-card p { font-size: 14px; color: var(--text-2); }
.shot-card--tall img { max-width: 300px; }

/* ---------- 步骤流程 ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.step-num {
  font-family: var(--font-en);
  font-size: 52px;
  font-weight: 900;
  line-height: 1;
  color: var(--primary-tint-2);
  -webkit-text-stroke: 1.5px var(--primary);
  margin-bottom: 18px;
}
.step-card h3 { font-size: 19px; font-weight: 800; margin-bottom: 10px; }
.step-card p { font-size: 15px; color: var(--text-2); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item[open] { border-color: var(--primary); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 17px;
  font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.faq-item summary .chev svg { width: 14px; height: 14px; }
.faq-item[open] summary .chev { transform: rotate(180deg); background: var(--primary); color: #fff; }
.faq-body {
  padding: 0 26px 24px;
  font-size: 15.5px;
  color: var(--text-2);
  line-height: 1.85;
}
.faq-body p + p { margin-top: 10px; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  padding: 76px 64px;
  background: linear-gradient(120deg, #1b2f8f 0%, #3858e9 55%, #5b7cf6 100%);
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.cta-band::before,
.cta-band::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.16);
}
.cta-band::before { width: 420px; height: 420px; top: -210px; right: -120px; }
.cta-band::after { width: 300px; height: 300px; bottom: -150px; left: -80px; }
.cta-band .eyebrow { color: rgba(255, 255, 255, 0.75); }
.cta-band .eyebrow::before { background: rgba(255, 255, 255, 0.6); }
.cta-band h2 {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.cta-band p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin: 0 auto 36px;
  position: relative;
  z-index: 1;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 72px 0 32px;
  margin-top: 104px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-brand img { height: 34px; width: auto; margin-bottom: 20px; }
.footer-brand .brand-dark { display: none; }
[data-theme="dark"] .footer-brand .brand-light { display: none; }
[data-theme="dark"] .footer-brand .brand-dark { display: block; }
.footer-brand p { font-size: 14.5px; color: var(--text-2); max-width: 300px; }
.footer-col h5 {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 18px;
}
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 15px; color: var(--text-2); transition: color 0.2s ease; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
  color: var(--text-3);
}

/* ---------- 下载页 ---------- */
.dl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.dl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 38px;
  display: flex;
  gap: 26px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.dl-icon {
  flex-shrink: 0;
  width: 68px; height: 68px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.dl-icon svg { width: 32px; height: 32px; }
.dl-icon--android { background: linear-gradient(140deg, #3ddc84, #1faf61); }
.dl-icon--ios { background: linear-gradient(140deg, #4b5563, #111827); }
.dl-icon--win { background: linear-gradient(140deg, #3858e9, #2a44c8); }
.dl-icon--mac { background: linear-gradient(140deg, #94a3b8, #64748b); }
.dl-body { flex: 1; min-width: 0; }
.dl-body h3 { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.dl-ver { font-size: 13.5px; color: var(--text-3); margin-bottom: 14px; font-family: var(--font-en); }
.dl-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.dl-tag {
  font-size: 12.5px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-2);
}
.dl-tag--hot { background: rgba(239, 68, 68, 0.1); color: #ef4444; }
.dl-tag--free { background: rgba(34, 197, 94, 0.12); color: #16a34a; }

/* 安装教程 */
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.guide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 34px;
  box-shadow: var(--shadow-sm);
}
.guide-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.guide-card h3 .badge {
  width: 34px; height: 34px;
  border-radius: 11px;
  background: var(--primary-tint);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.guide-card h3 .badge svg { width: 18px; height: 18px; }
.guide-card ol { counter-reset: g; }
.guide-card ol li {
  counter-increment: g;
  position: relative;
  padding-left: 38px;
  font-size: 15.5px;
  color: var(--text-2);
  margin-bottom: 14px;
  line-height: 1.8;
}
.guide-card ol li::before {
  content: counter(g);
  position: absolute;
  left: 0; top: 3px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.guide-card ol li strong { color: var(--text); }

/* ---------- 功能页 ---------- */
.feat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 104px;
}
.feat-row:last-child { margin-bottom: 0; }
.feat-row--reverse .feat-media { order: 2; }
.feat-media {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  display: flex;
  justify-content: center;
}
.feat-media img { max-width: 100%; }
.feat-media--phone img { max-height: 520px; width: auto; }
.feat-media--wide img { width: 100%; }
.feat-text h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 18px;
}
.feat-text > p { font-size: 16.5px; color: var(--text-2); margin-bottom: 26px; }
.feat-points li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
  font-size: 15.5px;
  color: var(--text-2);
}
.feat-points .tick {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.14);
  color: #16a34a;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
.feat-points .tick svg { width: 13px; height: 13px; }
.feat-points strong { color: var(--text); }

/* 平台支持表 */
.platform-table {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.platform-table table { width: 100%; border-collapse: collapse; }
.platform-table th,
.platform-table td {
  padding: 18px 26px;
  text-align: left;
  font-size: 15px;
  border-bottom: 1px solid var(--border);
}
.platform-table th {
  background: var(--surface-2);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-3);
}
.platform-table tr:last-child td { border-bottom: none; }
.platform-table td:first-child { font-weight: 700; color: var(--text); }
.platform-table .yes { color: #16a34a; font-weight: 700; }

/* ---------- 关于页 ---------- */
.prose { max-width: 760px; }
.prose h2 {
  font-size: 24px;
  font-weight: 800;
  margin: 44px 0 16px;
}
.prose h2:first-child { margin-top: 0; }
.prose p { font-size: 16.5px; color: var(--text-2); margin-bottom: 16px; line-height: 1.9; }
.prose ul { margin: 0 0 16px 0; }
.prose ul li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 10px;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 12px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.value-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  box-shadow: var(--shadow-sm);
}
.value-card .v-icon {
  width: 52px; height: 52px;
  border-radius: 16px;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.value-card .v-icon svg { width: 24px; height: 24px; }
.value-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
.value-card p { font-size: 14.5px; color: var(--text-2); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.contact-card .c-icon {
  width: 48px; height: 48px;
  margin: 0 auto 18px;
  border-radius: 14px;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card .c-icon svg { width: 22px; height: 22px; }
.contact-card h3 { font-size: 17px; font-weight: 800; margin-bottom: 6px; }
.contact-card p { font-size: 14.5px; color: var(--text-2); word-break: break-all; }

/* ---------- 面包屑 ---------- */
.page-hero {
  padding: 72px 0 64px;
  background:
    radial-gradient(800px 400px at 85% -20%, var(--primary-tint-2), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(32px, 4.6vw, 52px);
  font-weight: 900;
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin-bottom: 16px;
}
.page-hero p { font-size: 17.5px; color: var(--text-2); max-width: 620px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-3);
  margin-bottom: 22px;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.5; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .social-strip { grid-template-columns: repeat(4, 1fr); }
  .feat-row { grid-template-columns: 1fr; gap: 40px; }
  .feat-row--reverse .feat-media { order: 0; }
  .feat-media--phone img { max-height: 460px; }
}

@media (max-width: 920px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
  .site-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .site-nav a { padding: 13px 16px; border-radius: 12px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }

  .hero .container { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; }
  .hero { padding: 56px 0 88px; }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); }
  .duo-grid { grid-template-columns: 1fr; }
  .shots-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .dl-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .cta-band { padding: 56px 32px; }
  .dl-card { flex-direction: column; gap: 18px; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .adv-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .social-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-meta { gap: 20px; }
  .feature-card { padding: 36px 28px; }
  .platform-table th, .platform-table td { padding: 14px 16px; font-size: 14px; }
}

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}