/* ============================================================
   网好推科技 · whtgeo.com — 主样式表
   设计语言：深空科技 + 玻璃拟态 + 全域流量面板
   版本：2026-09-17 改版（移除 3D 地球 / 全端重做）
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bg-deep: #07070c;
  --bg-surface: #0d0d17;
  --bg-elev: #12121e;

  --card: rgba(255, 255, 255, 0.028);
  --card-hover: rgba(255, 255, 255, 0.055);
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.13);
  --line-glow: rgba(20, 184, 166, 0.30);

  --accent: #14b8a6;
  --accent-deep: #0d9488;
  --accent-light: #5eead4;
  --indigo: #6366f1;
  --violet: #a855f7;

  --text: #e6ecf5;
  --text-2: #94a3b8;
  --text-3: #64748b;

  --grad: linear-gradient(120deg, #14b8a6 0%, #6366f1 52%, #a855f7 100%);
  --grad-btn: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
  --grad-card: linear-gradient(135deg, rgba(20, 184, 166, 0.10), rgba(99, 102, 241, 0.07));

  --r-sm: 0.75rem;
  --r-md: 1rem;
  --r-lg: 1.35rem;
  --r-xl: 1.75rem;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 28px rgba(0, 0, 0, 0.32);
  --shadow-glow: 0 12px 40px rgba(20, 184, 166, 0.10);
  --shadow-pop: 0 18px 50px rgba(0, 0, 0, 0.5);

  --font: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 200ms var(--ease);
  --t-smooth: 420ms var(--ease);

  --nav-h: 72px;

  /* ---- 旧版变量别名（about.html 等历史页面仍在使用，勿删） ---- */
  --bg-surface-legacy: #0f0f18;
  --text-primary: #e6ecf5;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-soft: #0d9488;
  --accent-glow: rgba(20, 184, 166, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.13);
  --border-glow: rgba(20, 184, 166, 0.30);
  --gradient-hero: linear-gradient(120deg, #14b8a6 0%, #6366f1 52%, #a855f7 100%);
  --gradient-card: linear-gradient(135deg, rgba(20, 184, 166, 0.10), rgba(99, 102, 241, 0.07));
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.35rem;
  --radius-xl: 1.75rem;
  --font-heading: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --transition-fast: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100dvh;
  -webkit-text-size-adjust: 100%;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
ul { list-style: none; }

::selection { background: rgba(20, 184, 166, 0.3); color: #fff; }

/* 背景：细网格 + 顶部光晕（替代原粒子地球的“科技感”来源） */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.016) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -30vh;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, 130vw);
  height: 900px;
  background: radial-gradient(ellipse at center, rgba(20, 184, 166, 0.13) 0%, rgba(99, 102, 241, 0.07) 38%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--t-smooth), padding var(--t-smooth), border-color var(--t-smooth);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(7, 7, 12, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
  padding: 0.625rem 0;
}

/* 移动菜单展开时必须关掉导航本身的背景模糊：
   backdrop-filter 会让 .nav 变成 fixed 后代的包含块，
   导致全屏菜单被压回导航条高度（曾经实测只剩 120px）。 */
.nav.menu-open {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: transparent;
  border-bottom-color: transparent;
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-logo-icon {
  width: 2.35rem;
  height: 2.35rem;
  background: var(--grad);
  border-radius: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 6px 18px rgba(20, 184, 166, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  transition: color var(--t-fast);
  white-space: nowrap;
}

.nav-links a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -5px; left: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width var(--t-smooth);
}

.nav-links a:not(.nav-cta):hover { color: var(--text); }
.nav-links a:not(.nav-cta):hover::after { width: 100%; }

.nav-cta {
  padding: 0.5rem 1.2rem;
  background: rgba(20, 184, 166, 0.14);
  border: 1px solid var(--line-glow);
  border-radius: 999px;
  color: var(--accent-light) !important;
  font-weight: 600;
}

.nav-cta:hover { background: rgba(20, 184, 166, 0.26); }

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  z-index: 1002;
}

/* 移动端底部快捷咨询条 */
.mobile-cta-bar { display: none; }

/* --- Section Commons --- */
.section {
  position: relative;
  z-index: 1;
  padding: 6rem 2rem;
}

.section-inner { max-width: 1280px; margin: 0 auto; }

.section-header, .services-header, .ai-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--line-glow);
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.08);
}

.section-title {
  font-size: clamp(1.75rem, 3.4vw, 2.65rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin-bottom: 0.85rem;
}

.section-subtitle {
  color: var(--text-2);
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.75;
  max-width: 660px;
  margin: 0 auto;
}

/* --- Hero --- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-h) + 4rem) 2rem 4.5rem;
  overflow: visible;
}

.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content { max-width: 620px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: 1.5rem;
}

.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(1.6); }
}

.hero-title {
  font-size: clamp(1.8rem, 3.8vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.18;
  margin-bottom: 1.25rem;
}

.hero-title-line { display: block; }

.hero-title-gradient {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  color: var(--text-2);
  line-height: 1.85;
  margin-bottom: 2.25rem;
  max-width: 560px;
}

.hero-desc b { color: var(--text); font-weight: 600; }

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast), background var(--t-fast), border-color var(--t-fast);
  text-decoration: none;
  border: 1px solid transparent;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 8px 26px rgba(20, 184, 166, 0.28);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(20, 184, 166, 0.4); }

.btn-outline {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--line-strong);
  color: var(--text);
}

.btn-outline:hover { border-color: var(--accent); background: rgba(20, 184, 166, 0.07); }

/* 信任条 */
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.hero-trust-item {
  font-size: 0.82rem;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.hero-trust-item svg { width: 15px; height: 15px; stroke: var(--accent); flex-shrink: 0; }

/* --- Hero Visual: AI 搜索可见度面板（替代原旋转地球） --- */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 1.1rem;
}

.geo-demo {
  position: relative;
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, rgba(20, 184, 166, 0.09), rgba(99, 102, 241, 0.05) 45%, rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-pop);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
}

.geo-demo::before {
  content: '';
  position: absolute;
  top: 0; left: 12%; right: 12%;
  height: 1px;
  background: var(--grad);
  opacity: 0.85;
}

.geo-demo-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
}

.geo-dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.geo-dot:nth-child(1) { background: rgba(239, 68, 68, 0.65); }
.geo-dot:nth-child(2) { background: rgba(251, 191, 36, 0.65); }
.geo-dot:nth-child(3) { background: rgba(52, 211, 153, 0.65); }

.geo-demo-title {
  margin-left: 0.5rem;
  font-size: 0.76rem;
  color: var(--text-3);
  letter-spacing: 0.02em;
}

.geo-live {
  margin-left: auto;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid var(--line-glow);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.geo-live::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 1.6s ease-in-out infinite;
}

.geo-query {
  margin: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
}

.geo-query svg { width: 16px; height: 16px; stroke: var(--accent); flex-shrink: 0; }

.geo-query-text {
  font-size: 0.9rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.geo-caret {
  width: 1.5px;
  height: 1.05rem;
  background: var(--accent);
  margin-left: auto;
  flex-shrink: 0;
  animation: caret-blink 1.1s step-end infinite;
}

@keyframes caret-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.geo-answers { padding: 0 1.15rem 0.4rem; display: grid; gap: 0.7rem; }

.geo-answer {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.022);
  padding: 0.9rem 1rem;
}

.geo-answer-alt { background: rgba(255, 255, 255, 0.012); }

.geo-answer-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.geo-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 0.4rem;
  color: #fff;
}

.geo-badge-doubao { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.geo-badge-deepseek { background: linear-gradient(135deg, #4f46e5, #7c3aed); }

.geo-answer-note { font-size: 0.7rem; color: var(--text-3); }

.geo-text {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 0.55rem;
}

.geo-hit {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: 0.7rem;
  background: linear-gradient(100deg, rgba(20, 184, 166, 0.16), rgba(99, 102, 241, 0.09));
  border: 1px solid var(--line-glow);
  box-shadow: 0 0 0 1px rgba(20, 184, 166, 0.06), 0 6px 22px rgba(20, 184, 166, 0.12);
}

.geo-hit-rank {
  width: 1.35rem; height: 1.35rem;
  border-radius: 0.4rem;
  background: var(--grad-btn);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.geo-hit-name { font-size: 0.84rem; font-weight: 700; color: var(--text); }

.geo-hit-tag {
  margin-left: auto;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--accent-light);
  border: 1px solid var(--line-glow);
  background: rgba(20, 184, 166, 0.12);
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  white-space: nowrap;
}

.geo-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 1rem 1.15rem 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.16);
}

.geo-metric { padding: 0.7rem 0.5rem; text-align: center; }
.geo-metric + .geo-metric { border-left: 1px solid var(--line); }

.geo-metric b {
  display: block;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.25;
}

.geo-metric span { font-size: 0.68rem; color: var(--text-3); }

.geo-demo-foot {
  padding: 0.75rem 1.15rem 1rem;
  font-size: 0.66rem;
  color: var(--text-3);
  text-align: center;
}

/* 平台胶囊：静态换行排列，不做绝对定位 → 移动端不裁切 */
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.hero-chip {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-2);
  transition: transform var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.hero-chip:hover { transform: translateY(-2px); }
.chip-baidu:hover { border-color: rgba(96, 165, 250, 0.5); color: #93c5fd; }
.chip-douyin:hover { border-color: rgba(244, 114, 182, 0.5); color: #f9a8d4; }
.chip-tencent:hover { border-color: rgba(45, 212, 191, 0.5); color: #5eead4; }
.chip-xhs:hover { border-color: rgba(248, 113, 113, 0.5); color: #fca5a5; }
.chip-ai:hover { border-color: rgba(192, 132, 252, 0.5); color: #d8b4fe; }

/* --- Stats Strip --- */
.stats-strip {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.014), transparent);
}

.stats-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 2.75rem 2rem;
}

.stat-item { text-align: center; position: relative; }
.stat-item + .stat-item::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 62%;
  background: var(--line);
}

.stat-number {
  font-size: clamp(1.9rem, 3.2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.15;
  margin-bottom: 0.35rem;
}

.stat-label { font-size: 0.82rem; color: var(--text-3); }

/* --- Pain Points (新增) --- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.pain-card {
  position: relative;
  padding: 1.75rem 1.5rem;
  border-radius: var(--r-lg);
  background: var(--card);
  border: 1px solid var(--line);
  transition: transform var(--t-smooth), border-color var(--t-smooth), background var(--t-smooth);
  overflow: hidden;
}

.pain-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.75), rgba(251, 146, 60, 0.5));
  opacity: 0.9;
}

.pain-card:hover { transform: translateY(-4px); border-color: var(--line-strong); background: var(--card-hover); }

.pain-icon {
  width: 2.75rem; height: 2.75rem;
  border-radius: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  margin-bottom: 1.1rem;
  color: #f87171;
}

.pain-icon svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; }

.pain-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; letter-spacing: -0.01em; }
.pain-card p { font-size: 0.85rem; color: var(--text-2); line-height: 1.7; }

/* --- Services --- */
.services-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.service-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.9rem;
  transition: transform var(--t-smooth), background var(--t-smooth), border-color var(--t-smooth), box-shadow var(--t-smooth);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--grad);
  opacity: 0;
  transition: opacity var(--t-smooth);
}

.service-card:hover {
  background: var(--card-hover);
  border-color: var(--line-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.service-card:hover::before { opacity: 1; }

/* 6 张卡等宽 2×3 排布，避免末行留空；主推卡靠渐变底 + 高亮描边区分层级 */
.service-card.featured {
  background: var(--grad-card);
  border-color: var(--line-glow);
}

.service-card.featured .service-icon {
  background: rgba(20, 184, 166, 0.2);
  border-color: rgba(20, 184, 166, 0.32);
}

.service-icon {
  width: 2.9rem; height: 2.9rem;
  border-radius: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.15rem;
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.18);
  color: var(--accent);
}

.service-icon svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; }

.service-card.featured .service-icon { background: rgba(20, 184, 166, 0.18); }

.service-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.55rem; letter-spacing: -0.01em; }
.service-card p { font-size: 0.88rem; color: var(--text-2); line-height: 1.72; margin-bottom: 1.1rem; }

.service-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.service-tag {
  font-size: 0.69rem;
  padding: 0.24rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--text-3);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.service-card:hover .service-tag { border-color: var(--line-strong); color: var(--text-2); }

/* --- AI Section --- */
.ai-section {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, rgba(20, 184, 166, 0.03), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 6rem 2rem;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  max-width: 1280px;
  margin: 0 auto;
}

.ai-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.6rem 1.35rem;
  text-align: center;
  transition: transform var(--t-smooth), background var(--t-smooth), border-color var(--t-smooth), box-shadow var(--t-smooth);
  overflow: hidden;
}

.ai-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-smooth);
}

.ai-card:hover {
  background: var(--card-hover);
  border-color: var(--line-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.ai-card:hover::after { transform: scaleX(1); }

.ai-card-icon {
  width: 3.2rem; height: 3.2rem;
  border-radius: 0.9rem;
  margin: 0 auto 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  background: var(--grad);
  box-shadow: 0 8px 22px rgba(20, 184, 166, 0.2);
  letter-spacing: -0.02em;
}

.ai-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.35rem; }
.ai-card p { font-size: 0.78rem; color: var(--text-3); line-height: 1.6; }

/* --- Advertising --- */
.ad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.ad-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.6rem;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast);
  overflow: hidden;
}

.ad-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-smooth);
}

.ad-card:hover { background: var(--card-hover); border-color: var(--line-strong); transform: translateY(-2px); }
.ad-card:hover::after { transform: scaleX(1); }

.ad-card-header { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.9rem; }

.ad-card-icon {
  width: 2.4rem; height: 2.4rem;
  border-radius: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  flex-shrink: 0;
}

.ad-card h4 { font-size: 0.98rem; font-weight: 700; }
.ad-card p { font-size: 0.81rem; color: var(--text-3); line-height: 1.65; }

/* --- Advantages (新增) --- */
.adv-section {
  position: relative;
  z-index: 1;
  padding: 6rem 2rem;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.adv-card {
  display: flex;
  gap: 1.1rem;
  padding: 1.7rem 1.6rem;
  border-radius: var(--r-lg);
  background: var(--card);
  border: 1px solid var(--line);
  transition: transform var(--t-smooth), background var(--t-smooth), border-color var(--t-smooth);
}

.adv-card:hover { transform: translateY(-3px); background: var(--card-hover); border-color: var(--line-strong); }

.adv-index {
  flex-shrink: 0;
  width: 2.6rem; height: 2.6rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--accent-light);
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.2);
}

.adv-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.4rem; }
.adv-card p { font-size: 0.86rem; color: var(--text-2); line-height: 1.72; }

/* --- Regions --- */
.regions-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.7rem;
}

.region-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.15rem 0.85rem;
  text-align: center;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}

.region-card:hover { background: var(--card-hover); border-color: var(--line-glow); transform: translateY(-2px); }

.region-card.primary {
  border-color: var(--line-glow);
  background: var(--grad-card);
}

.region-name { font-weight: 700; font-size: 1.02rem; margin-bottom: 0.2rem; }
.region-sub { font-size: 0.72rem; color: var(--text-3); }

/* --- Process --- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
}

.process-step { position: relative; text-align: center; }

.process-step::after {
  content: '';
  position: absolute;
  top: 1.5rem;
  left: calc(50% + 2.4rem);
  width: calc(100% - 4.8rem);
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}

.process-step:last-child::after { display: none; }

.process-number {
  width: 3rem; height: 3rem;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.02rem;
  font-weight: 800;
  margin: 0 auto 1.1rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 8px 22px rgba(20, 184, 166, 0.22);
}

.process-step h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.45rem; }
.process-step p { font-size: 0.82rem; color: var(--text-3); line-height: 1.65; }

/* --- FAQ (新增) --- */
.faq-list { max-width: 880px; margin: 0 auto; display: grid; gap: 0.7rem; }

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--card);
  overflow: hidden;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.faq-item[open] { border-color: var(--line-glow); background: rgba(20, 184, 166, 0.04); }

.faq-q {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.35rem;
  font-size: 0.98rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  transition: color var(--t-fast);
}

.faq-q::-webkit-details-marker { display: none; }
.faq-q:hover { color: var(--accent-light); }

.faq-q::before {
  content: 'Q';
  flex-shrink: 0;
  width: 1.65rem; height: 1.65rem;
  border-radius: 0.45rem;
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.2);
  color: var(--accent-light);
  font-size: 0.72rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-q::after {
  content: '+';
  margin-left: auto;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-3);
  transition: transform var(--t-smooth);
  line-height: 1;
}

.faq-item[open] .faq-q::after { transform: rotate(45deg); color: var(--accent); }

.faq-a {
  padding: 0 1.35rem 1.25rem 3.9rem;
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.8;
}

/* --- CTA --- */
.cta-section { position: relative; z-index: 1; padding: 6rem 2rem; }

.cta-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--grad-card);
  border: 1px solid var(--line-glow);
  border-radius: var(--r-xl);
  padding: 3.5rem 2.75rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at center, rgba(20, 184, 166, 0.07), transparent 55%);
  animation: cta-glow 9s ease-in-out infinite;
}

@keyframes cta-glow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(5%, -5%); }
}

.cta-card > * { position: relative; z-index: 1; }
.cta-card .section-title { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
.cta-card .section-subtitle { margin-bottom: 2rem; }
.cta-card .hero-actions { justify-content: center; }

.cta-foot {
  color: var(--text-3);
  font-size: 0.82rem;
  margin-top: 1.5rem;
  line-height: 1.8;
}

.cta-foot a { color: var(--accent-light); text-decoration: none; font-weight: 600; }

/* --- News / Blog --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}

.news-card:hover {
  border-color: var(--line-glow);
  background: var(--card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

/* 卡片顶部色带（AI 卡片与静态卡片统一结构） */
.news-card .news-image,
.news-card > .news-tag {
  position: relative;
}

.news-card .news-image {
  height: 66px;
  flex-shrink: 0;
  background:
    radial-gradient(120% 150% at 12% 0%, rgba(20, 184, 166, 0.28), transparent 60%),
    linear-gradient(120deg, rgba(99, 102, 241, 0.16), rgba(168, 85, 247, 0.10));
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 1.15rem;
}

.news-card:nth-child(3n+2) .news-image {
  background:
    radial-gradient(120% 150% at 12% 0%, rgba(99, 102, 241, 0.26), transparent 60%),
    linear-gradient(120deg, rgba(20, 184, 166, 0.14), rgba(99, 102, 241, 0.12));
}

.news-card:nth-child(3n) .news-image {
  background:
    radial-gradient(120% 150% at 12% 0%, rgba(168, 85, 247, 0.24), transparent 60%),
    linear-gradient(120deg, rgba(168, 85, 247, 0.12), rgba(20, 184, 166, 0.12));
}

.news-card .news-content {
  padding: 1.15rem 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
  background: rgba(20, 184, 166, 0.14);
  border: 1px solid rgba(20, 184, 166, 0.22);
  color: var(--accent-light);
  white-space: nowrap;
}

.news-card .news-content .news-tag { margin-bottom: 0.7rem; align-self: flex-start; }

.news-card .news-content h3,
.news-card .news-title {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 0.55rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card .news-content p,
.news-card .news-excerpt {
  font-size: 0.8rem;
  color: var(--text-3);
  line-height: 1.65;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-date { font-size: 0.72rem; color: var(--text-3); display: block; margin-bottom: 0.5rem; }

.news-link {
  font-size: 0.78rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--t-fast), gap var(--t-fast);
  margin-top: auto;
}

.news-link:hover { color: var(--accent-light); }
.news-link i { font-style: normal; }

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  gap: 0.75rem;
}

.news-meta .news-date { margin-bottom: 0; }

/* 静态卡片旧结构兜底（无 .news-content 包裹时） */
.news-card > .news-tag { margin: 1.25rem 1.25rem 0; align-self: flex-start; }
.news-card > .news-title { margin: 0.75rem 1.25rem 0; }
.news-card > .news-excerpt { margin: 0 1.25rem 1rem; }
.news-card > .news-meta { margin: 0 1.25rem 1.35rem; }

.news-more-wrap { text-align: center; margin-top: 2.75rem; }

.news-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.9rem 2.4rem;
  border-radius: 999px;
  background: var(--grad-btn);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(20, 184, 166, 0.3);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}

.news-more-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(20, 184, 166, 0.42); }
.news-more-arrow { transition: transform var(--t-fast); }
.news-more-btn:hover .news-more-arrow { transform: translateX(5px); }
.news-more-tip { margin-top: 0.85rem; font-size: 0.78rem; color: var(--text-3); }

/* --- Footer --- */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.012), transparent);
  padding: 3.75rem 2rem 2rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.75rem;
}

.footer-brand h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.7rem; }
.footer-brand p { font-size: 0.84rem; color: var(--text-3); line-height: 1.75; max-width: 300px; }

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 1.1rem;
}

.footer-col li { margin-bottom: 0.6rem; }

.footer-col li a {
  color: var(--text-3);
  text-decoration: none;
  font-size: 0.84rem;
  transition: color var(--t-fast);
}

.footer-col li a:hover { color: var(--accent-light); }

.footer-bottom {
  max-width: 1280px;
  margin: 2.75rem auto 0;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.78rem;
  color: var(--text-3);
  flex-wrap: wrap;
}

.footer-bottom a { color: var(--text-3); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent-light); }

/* 友情链接 */
.seo-friend-links {
  max-width: 1280px;
  margin: 1.25rem auto 0;
  padding: 0.85rem 0 0;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 11px;
  color: var(--text-3);
  line-height: 2;
}

.seo-friend-links a {
  color: var(--text-3) !important;
  text-decoration: none;
  margin: 0 7px;
}

.seo-friend-links a:hover { color: var(--accent-light) !important; }

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 2.75rem; height: 2.75rem;
  border-radius: 50%;
  background: rgba(20, 184, 166, 0.16);
  border: 1px solid var(--line-glow);
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--t-smooth), transform var(--t-smooth), background var(--t-fast);
  font-size: 1.05rem;
  pointer-events: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: rgba(20, 184, 166, 0.3); }

/* --- Reveal ---
   渐进增强：默认全部可见（JS 失效时内容不会消失），
   仅在 <html class="js"> 存在时才做隐藏 + 进场动画。 */
.reveal {
  opacity: 1;
  transform: none;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

html.js .reveal.visible { opacity: 1; transform: translateY(0); }

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.4s; }

/* ============================================================
   响应式
   ============================================================ */

/* 大屏收敛 */
@media (max-width: 1200px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .regions-grid { grid-template-columns: repeat(4, 1fr); }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1080px) {
  .ai-grid { grid-template-columns: repeat(3, 1fr); }
  .ad-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 平板 / 移动菜单 */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    position: fixed;
    inset: 0;
    background: rgba(7, 7, 12, 0.98);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    padding: 5.5rem 1.75rem 2rem;
    gap: 0.25rem;
    z-index: 1001;
    overflow-y: auto;
  }

  .nav-links.open li { width: 100%; }

  .nav-links.open a {
    display: block;
    width: 100%;
    font-size: 1.1rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--line);
    color: var(--text);
  }

  .nav-links.open a::after { display: none; }

  .nav-links.open .nav-cta {
    margin-top: 1.25rem;
    text-align: center;
    border-bottom: none;
    color: var(--accent-light) !important;
  }

  /* Hero：内容优先（原版地球图在移动端抢在标题之前，这里修正） */
  .hero {
    min-height: auto;
    padding: calc(var(--nav-h) + 2.75rem) 1.5rem 3rem;
  }

  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-content { max-width: 100%; text-align: center; }
  .hero-desc { max-width: 100%; margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-trust { justify-content: center; gap: 1rem 1.25rem; }  .hero-visual { order: 2; }

  .section, .ai-section, .adv-section, .cta-section { padding: 4.25rem 1.5rem; }

  .services-bento { grid-template-columns: repeat(2, 1fr); }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.75rem 1rem; padding: 2.25rem 1.5rem; }
  .stat-item:nth-child(odd)::before { display: none; }
  .stat-item:nth-child(3)::before { display: none; }

  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 2rem 1.25rem; }
  .process-step::after { display: none; }

  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }

  .adv-grid { grid-template-columns: 1fr; }

  /* 移动端底部快捷条 */
  .mobile-cta-bar {
    display: flex;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 998;
    gap: 0.5rem;
    padding: 0.55rem 0.85rem calc(0.55rem + env(safe-area-inset-bottom, 0px));
    background: rgba(7, 7, 12, 0.94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--line);
  }

  .mobile-cta-bar a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.7rem 0.5rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
  }

  .mcb-call { background: var(--grad-btn); color: #fff; }
  .mcb-chat { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line-strong); color: var(--text); }

  body.has-mobile-cta { padding-bottom: 4.25rem; }

  .back-to-top { bottom: 5rem; right: 1rem; width: 2.5rem; height: 2.5rem; }
}

/* 手机 */
@media (max-width: 640px) {
  .nav-inner { padding: 0 1.25rem; }
  .nav-logo { font-size: 1.05rem; }
  .nav-logo-icon { width: 2.1rem; height: 2.1rem; font-size: 1rem; }

  .hero { padding: calc(var(--nav-h) + 2.25rem) 1.25rem 2.75rem; }
  .hero-title { font-size: clamp(1.7rem, 7.6vw, 2.35rem); }
  .hero-badge { font-size: 0.72rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { flex-direction: column; align-items: center; gap: 0.7rem; }

  .geo-query { margin: 0.9rem; padding: 0.7rem 0.85rem; }
  .geo-query-text { font-size: 0.84rem; }
  .geo-answers { padding: 0 0.9rem 0.3rem; }
  .geo-answer { padding: 0.8rem 0.85rem; }
  .geo-metrics { margin: 0.9rem 0.9rem 0; }
  .geo-metric b { font-size: 0.92rem; }
  .geo-demo-foot { padding: 0.65rem 0.9rem 0.9rem; }
  .hero-chip { font-size: 0.72rem; padding: 0.34rem 0.7rem; }

  .section, .ai-section, .adv-section, .cta-section { padding: 3.5rem 1.25rem; }
  .section-header, .services-header, .ai-header { margin-bottom: 2.5rem; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); padding: 2rem 1.25rem; }

  .pain-grid { grid-template-columns: 1fr; gap: 0.9rem; }
  .services-bento { grid-template-columns: 1fr; }
  .service-card { padding: 1.6rem; }

  .ai-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .ai-card { padding: 1.3rem 1rem; }
  .ai-card-icon { width: 2.8rem; height: 2.8rem; font-size: 1rem; }

  .ad-grid { grid-template-columns: 1fr; gap: 0.9rem; }
  .ad-card { padding: 1.35rem; }

  .adv-card { padding: 1.4rem 1.25rem; gap: 0.9rem; }
  .adv-index { width: 2.35rem; height: 2.35rem; font-size: 0.88rem; }

  .regions-grid { grid-template-columns: repeat(2, 1fr); }

  .process-steps { grid-template-columns: 1fr; gap: 1.75rem; }

  .faq-q { padding: 1rem 1.1rem; font-size: 0.92rem; }
  .faq-a { padding: 0 1.1rem 1.1rem 3.2rem; font-size: 0.85rem; }

  .cta-card { padding: 2.5rem 1.4rem; }
  .cta-card .hero-actions { flex-direction: column; }
  .cta-card .hero-actions .btn { width: 100%; }

  .news-grid { grid-template-columns: 1fr; }

  .footer { padding: 3rem 1.25rem 1.75rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 0.5rem; }
}

@media (max-width: 400px) {
  .geo-metric b { font-size: 0.85rem; }
  .geo-metric span { font-size: 0.62rem; }
  .ai-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   旧版首页元素兜底（防御性，勿删）
   服务器/WAF 对 HTML 下发 30 天强缓存，Apache 层覆盖无效。
   老访客可能仍在用缓存中的旧 index.html（旋转地球版），
   而它引用的正是本文件。若不保留这些旧类的基本样式，
   2MB 的地球图会以原始尺寸撑破布局。新页面没有元素会命中
   这些选择器，属于零成本兜底。
   ============================================================ */
.hero-planet {
  width: 340px; height: 340px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.globe-2d {
  width: 260px; height: 260px; max-width: 260px;
  border-radius: 50%; object-fit: cover; display: block;
}
.planet-atmosphere { position: absolute; inset: -8%; border-radius: 50%; pointer-events: none; }
.hero-orb-satellite {
  position: absolute; width: 6px; height: 6px;
  border-radius: 50%; background: var(--accent); pointer-events: none;
}
.hero-floating-cards { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.float-card {
  position: absolute;
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.75rem 1rem;
  font-size: 0.78rem; white-space: nowrap;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text-2);
}
.card-1 { top: 5%; right: 8%; }
.card-2 { top: 22%; right: 0; }
.card-3 { top: 42%; right: 5%; }
.card-4 { bottom: 18%; right: 10%; }
.card-5 { bottom: 5%; right: 0; }
.float-card-icon {
  width: 2rem; height: 2rem; border-radius: 0.5rem;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
  background: rgba(255, 255, 255, 0.08);
}
.fc-baidu { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.fc-douyin { background: rgba(236, 72, 153, 0.15); color: #f472b6; }
.fc-tencent { background: rgba(20, 184, 166, 0.15); color: #2dd4bf; }

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  #particle-canvas { display: none; }
  .reveal { opacity: 1; transform: none; }
}