/* ============================================
   ASO星辰 - 主样式文件
   蓝色主题 · 干净整洁
============================================ */

:root {
  --primary: #1a6fff;
  --primary-dark: #0d4fd4;
  --primary-light: #4f8fff;
  --primary-pale: #e8f0ff;
  --accent: #00d4ff;
  --text-dark: #0d1b3e;
  --text-body: #3a4b6b;
  --text-muted: #7a8db5;
  --bg-white: #ffffff;
  --bg-light: #f0f7ff;
  --bg-section: #f8fbff;
  --border: #dce9ff;
  --shadow-sm: 0 2px 12px rgba(26,111,255,0.08);
  --shadow-md: 0 8px 32px rgba(26,111,255,0.12);
  --shadow-lg: 0 16px 48px rgba(26,111,255,0.18);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-pad { padding: 80px 0; }

/* ====== 按钮 ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(26,111,255,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,111,255,0.45);
}
.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: rgba(26, 111, 255, 0.08);
  font-weight: 600;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 111, 255, 0.3);
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-full { width: 100%; }

/* ====== Section Header ====== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-pale);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ====== 导航栏 ====== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow-md);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: 68px;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.logo-icon { font-size: 24px; }
.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-dark);
}
.logo-accent { color: var(--primary); }
.logo-white .logo-text { color: #fff; }
.logo-white .logo-accent { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-item {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-item:hover, .nav-item.active {
  color: var(--primary);
  background: var(--primary-pale);
}
.nav-cta { flex-shrink: 0; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ====== Hero ====== */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, #0d2b7a 0%, #1a4fd4 40%, #0096ff 100%);
  display: flex;
  align-items: center;
  padding-top: 68px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.hero-circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}
.hero-circle.c1 { width: 500px; height: 500px; top: -100px; right: -100px; }
.hero-circle.c2 { width: 300px; height: 300px; bottom: 50px; left: -80px; }
.hero-circle.c3 { width: 200px; height: 200px; top: 50%; right: 30%; }

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 24px 100px;
  position: relative;
  z-index: 1;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 13px;
  padding: 8px 18px;
  border-radius: 50px;
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
}
.hero-title {
  font-size: 52px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-title .highlight {
  color: var(--accent);
  text-shadow: 0 0 30px rgba(0,212,255,0.5);
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 480px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; margin-bottom: 48px; flex-wrap: wrap; }
/* Hero区域按钮特殊样式 - 深色背景需要更明显的边框 */
.hero .btn-outline {
  border-color: rgba(255,255,255,0.7);
  color: #fff;
  background: rgba(255,255,255,0.12);
}
.hero .btn-outline:hover {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.stat-num em { font-style: normal; font-size: 18px; color: var(--accent); }
.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
  display: block;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.25);
}

/* Phone Mockup */
.hero-right { display: flex; justify-content: center; }
.hero-phone-wrap { position: relative; }
.phone-mockup {
  width: 260px;
  height: 520px;
  background: linear-gradient(160deg, #1a1a2e, #16213e);
  border-radius: 40px;
  padding: 20px 14px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5), inset 0 0 0 2px rgba(255,255,255,0.1);
  position: relative;
}
.phone-mockup::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 6px;
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
}
.phone-screen {
  background: #f8fbff;
  border-radius: 28px;
  height: 100%;
  overflow: hidden;
  padding: 14px;
}
.app-store-ui { height: 100%; display: flex; flex-direction: column; gap: 12px; }
.store-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark);
  padding: 8px 10px;
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}
.rank-list { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.rank-item {
  background: #fff;
  border-radius: 10px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  box-shadow: var(--shadow-sm);
}
.rank-item.rank-1 { background: linear-gradient(135deg, #fff9e6, #fff); border: 1px solid #ffd700; }
.rank-badge { font-size: 11px; font-weight: 700; color: var(--primary); }
.rank-item.rank-1 .rank-badge { color: #d4a000; }
.rank-app { display: flex; align-items: center; gap: 8px; }
.app-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  color: #fff;
  flex-shrink: 0;
}
.app-info { flex: 1; }
.app-name { display: block; font-size: 11px; font-weight: 600; color: var(--text-dark); }
.app-cat { font-size: 10px; color: var(--text-muted); }
.app-stars { font-size: 10px; color: #ffc107; }
.trend-bar {
  background: #fff;
  border-radius: 10px;
  padding: 8px 10px;
  box-shadow: var(--shadow-sm);
}
.trend-label { font-size: 10px; color: var(--text-muted); display: block; margin-bottom: 6px; }
.bar-track { background: #e8f0ff; border-radius: 4px; height: 6px; position: relative; }
.bar-fill { background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 4px; height: 100%; }
.trend-val { font-size: 11px; font-weight: 700; color: var(--primary); display: block; text-align: right; margin-top: 4px; }

/* Float Cards */
.float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 150px;
  animation: float 3s ease-in-out infinite;
}
.float-card.card-1 { top: 40px; right: -60px; animation-delay: 0s; }
.float-card.card-2 { bottom: 80px; left: -60px; animation-delay: 1.5s; }
.card-icon { font-size: 24px; }
.card-title { display: block; font-size: 11px; color: var(--text-muted); }
.card-val { display: block; font-size: 16px; font-weight: 700; color: var(--primary); }
.card-val em { font-style: normal; color: #22c55e; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
}
.hero-wave svg { width: 100%; display: block; }

/* ====== 信任带 ====== */
.trust-band {
  background: var(--bg-light);
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.trust-label {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.trust-logos {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.trust-logo {
  padding: 8px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  transition: all var(--transition);
}
.trust-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ====== 服务网格 ====== */
.services { background: var(--bg-white); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(26,111,255,0.12);
  border-color: var(--primary-light);
}
.service-card.featured {
  border-color: var(--primary-light);
  border-width: 1.5px;
  background: #f8fbff;
}
.service-icon-wrap {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, #e8f0ff, #d4e8ff);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.service-icon { font-size: 26px; }
.service-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}
.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.service-features {
  margin-bottom: 20px;
}
.service-features li {
  font-size: 13px;
  color: var(--text-body);
  padding: 4px 0;
}
.service-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.service-link:hover { gap: 8px; }

/* ====== 数字区域 ====== */
.numbers-section {
  background: linear-gradient(135deg, #1a4fd4, #0096ff);
  padding: 60px 0;
}
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.number-item {
  text-align: center;
  color: #fff;
}
.number-icon { font-size: 36px; margin-bottom: 12px; }
.number-val {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  display: inline;
}
.number-suffix {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  display: inline;
}
.number-label {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-top: 8px;
}

/* ====== 核心优势 ====== */
.advantages { background: var(--bg-section); }
.adv-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}
.adv-chart {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
}
.chart-title { font-size: 14px; font-weight: 600; color: var(--text-dark); margin-bottom: 24px; }
.chart-bars {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 16px;
  height: 160px;
  margin-bottom: 16px;
}
.chart-col { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.bar-before, .bar-after {
  width: 60px;
  background: var(--bg-light);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}
.bar-before { height: 120px; }
.bar-after { height: 120px; }
.bar-before .bar-inner { width: 100%; background: #b0c4ff; transition: height 1.5s ease; }
.bar-after .bar-inner { width: 100%; background: linear-gradient(180deg, var(--accent), var(--primary)); transition: height 1.5s ease; }
.bar-label { font-size: 12px; color: var(--text-muted); }
.chart-arrow { font-size: 24px; align-self: center; }
.chart-note { font-size: 13px; color: var(--text-body); text-align: center; }
.chart-note strong { color: var(--primary); }
.adv-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.adv-badge {
  padding: 8px 16px;
  background: var(--primary-pale);
  color: var(--primary);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
}
.adv-list { display: flex; flex-direction: column; gap: 28px; }
.adv-item { display: flex; gap: 20px; align-items: flex-start; }
.adv-icon {
  width: 48px; height: 48px;
  background: var(--primary-pale);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.adv-text h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); }
.adv-text p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ====== 流程 ====== */
.process { background: var(--bg-white); }
.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
}
.process-step {
  flex: 1;
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  position: relative;
  transition: all var(--transition);
}
.process-step:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.step-num {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
}
.step-icon { font-size: 36px; margin-bottom: 12px; }
.process-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.process-step p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.process-arrow {
  font-size: 24px;
  color: var(--primary-light);
  padding-top: 48px;
  flex-shrink: 0;
}

/* ====== 案例 ====== */
.cases { background: var(--bg-section); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.case-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.case-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.case-header h4 { font-size: 16px; font-weight: 700; }
.case-category { font-size: 12px; color: var(--text-muted); }
.case-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
}
.metric-val {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}
.metric-label { font-size: 12px; color: var(--text-muted); }
.case-desc { font-size: 13px; color: var(--text-body); line-height: 1.7; margin-bottom: 16px; }
.case-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  padding: 4px 12px;
  background: var(--primary-pale);
  color: var(--primary);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
}
.cases-cta { text-align: center; }

/* ====== 促销区域 ====== */
.promo-section {
  background: linear-gradient(135deg, #0d2b7a, #1a4fd4);
  padding: 60px 0;
}
.promo-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.promo-tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.promo-left h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.promo-left p { font-size: 15px; color: rgba(255,255,255,0.8); margin-bottom: 24px; }
.promo-price { display: flex; align-items: baseline; gap: 12px; }
.price-old { font-size: 20px; color: rgba(255,255,255,0.5); text-decoration: line-through; }
.price-new { font-size: 42px; font-weight: 800; color: var(--accent); }
.price-save {
  background: #ff4d6d;
  color: #fff;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
}
.promo-items { margin-bottom: 28px; display: flex; flex-direction: column; gap: 12px; }
.promo-item { font-size: 14px; color: rgba(255,255,255,0.9); }

/* ====== 评价 ====== */
.testimonials { background: var(--bg-white); }
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-section);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.quote {
  font-size: 48px;
  color: var(--primary-light);
  line-height: 0.8;
  margin-bottom: 12px;
  font-family: Georgia, serif;
}
.testimonial-card p { font-size: 14px; color: var(--text-body); line-height: 1.8; margin-bottom: 20px; }
.reviewer { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.reviewer-avatar {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
}
.reviewer-name { display: block; font-size: 14px; font-weight: 600; }
.reviewer-role { font-size: 12px; color: var(--text-muted); }
.review-stars { font-size: 14px; color: #ffc107; }

/* ====== 联系 ====== */
.contact { background: var(--bg-section); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}
.contact-left h2 { font-size: 32px; font-weight: 700; margin: 12px 0; }
.contact-left p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 28px; }
.contact-info-list { display: flex; flex-direction: column; gap: 14px; }
.contact-info-item { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--text-body); }
.ci-icon { font-size: 20px; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text-dark); }
.form-group input,
.form-group select,
.form-group textarea {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-dark);
  background: #fff;
  transition: border-color var(--transition);
  font-family: inherit;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,111,255,0.1);
}

/* 联系方式输入组 */
.contact-input-group {
  display: flex;
  gap: 8px;
}
.contact-type-select {
  width: 110px;
  flex-shrink: 0;
  padding: 12px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-dark);
  background: #fff;
  cursor: pointer;
  outline: none;
}
.contact-type-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,111,255,0.1);
}
.contact-input-group input {
  flex: 1;
}

@media (max-width: 480px) {
  .contact-input-group {
    flex-direction: column;
  }
  .contact-type-select {
    width: 100%;
  }
}

/* ====== 页脚 ====== */
.footer {
  background: #0d1b3e;
  color: rgba(255,255,255,0.7);
}
.footer-top {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  padding: 64px 0 40px;
}
.footer-brand p { font-size: 14px; line-height: 1.8; margin: 16px 0 24px; }
.social-links { display: flex; gap: 10px; }
.social-btn {
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  transition: all var(--transition);
}
.social-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h5 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 6px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}

/* ====== Toast ====== */
.toast {
  display: none;
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: #1a4fd4;
  color: #fff;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 15px;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  transition: bottom 0.4s ease;
}
.toast.show { 
  display: block;
  bottom: 40px; 
}

/* ====== 知识库模块（首页） ====== */
.kb-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.kb-article-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: all 0.3s;
  cursor: pointer;
}
.kb-article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}
.kb-article-img {
  aspect-ratio: 16 / 9;
  width: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  overflow: hidden;
}
.kb-article-body {
  padding: 20px;
}
.kb-article-cat {
  display: inline-block;
  padding: 4px 12px;
  background: #e8f0ff;
  color: #1a6fff;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 10px;
}
.kb-article-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  line-height: 1.5;
}
.kb-article-card h3 a {
  color: #1a1a1a;
  text-decoration: none;
}
.kb-article-card h3 a:hover {
  color: #1a6fff;
}
.kb-article-excerpt {
  font-size: 13px;
  color: #666;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.kb-article-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #999;
  margin-top: 12px;
}
.kb-more {
  text-align: center;
}

@media (max-width: 768px) {
  .kb-articles-grid {
    grid-template-columns: 1fr;
  }
}

/* ====== 回到顶部 ====== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: all var(--transition);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; }
.back-to-top:hover { transform: translateY(-3px); }

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .hero-title { font-size: 40px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-content { grid-template-columns: 1fr; }
  .promo-inner { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .section-title { font-size: 26px; }
  .hero-title { font-size: 32px; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; }
  .process-arrow { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .hero-stats { gap: 16px; }
  .stat-num { font-size: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ====== 分类页特有样式 ====== */
.page-hero {
  background: linear-gradient(135deg, #0d2b7a, #1a4fd4, #0096ff);
  padding: 120px 0 80px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0; right: 0;
  height: 60px;
  background: var(--bg-white);
  clip-path: ellipse(55% 100% at 50% 100%);
}
.page-hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 16px; position: relative; z-index: 1; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 500px; margin: 0 auto; position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,0.4); }

/* 分类筛选 */
.filter-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 68px;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.filter-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.filter-label { font-size: 14px; font-weight: 600; color: var(--text-dark); margin-right: 4px; }
.filter-btn {
  padding: 8px 20px;
  border-radius: 50px;
  border: 1.5px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  cursor: pointer;
  background: #fff;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 分类主内容 */
.category-main { padding: 60px 0; }
.category-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

/* 侧边栏 */
.cat-sidebar {
  position: sticky;
  top: 120px;
}
.sidebar-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
}
.sidebar-title {
  padding: 16px 20px;
  background: var(--primary-pale);
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}
.sidebar-menu { padding: 8px 0; }
.sidebar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition);
}
.sidebar-item:hover, .sidebar-item.active {
  background: var(--bg-light);
  color: var(--primary);
}
.sidebar-item .count {
  background: var(--primary-pale);
  color: var(--primary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 50px;
  font-weight: 600;
}

/* 产品网格 */
.cat-products-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.cat-count { font-size: 14px; color: var(--text-muted); }
.sort-select {
  padding: 8px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-dark);
  cursor: pointer;
  background: #fff;
  outline: none;
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.product-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.product-icon-wrap {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: var(--primary-pale);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.product-badge {
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 600;
}
.badge-hot { background: #ffe8e8; color: #e63946; }
.badge-new { background: #e8fff0; color: #2d9e5f; }
.badge-rec { background: var(--primary-pale); color: var(--primary); }
.product-card h4 { font-size: 16px; font-weight: 700; flex: 1; }
.product-desc { font-size: 13px; color: var(--text-muted); line-height: 1.7; }
.product-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}
.product-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: auto;
}
.price-from { font-size: 12px; color: var(--text-muted); }
.price-amount { font-size: 22px; font-weight: 800; color: var(--primary); }
.price-unit { font-size: 12px; color: var(--text-muted); }
.product-actions { display: flex; gap: 10px; }

/* 热门关键词云 */
.keyword-cloud { display: flex; gap: 8px; flex-wrap: wrap; }
.kw-tag {
  padding: 6px 14px;
  background: var(--bg-light);
  color: var(--text-body);
  border-radius: 50px;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
}
.kw-tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* CTA横幅 */
.cta-banner {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  padding: 32px 28px;
  color: #fff;
  text-align: center;
  margin-bottom: 20px;
}
.cta-banner h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.cta-banner p { font-size: 13px; color: rgba(255,255,255,0.85); margin-bottom: 16px; }

/* ====== 分类页移动端适配 ====== */
@media (max-width: 1024px) {
  .category-layout {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  /* 页面标题区 */
  .page-hero {
    padding: 90px 20px 70px;
  }
  .page-hero::after {
    height: 40px;
  }
  .page-hero h1 {
    font-size: 26px;
    margin-bottom: 12px;
  }
  .page-hero p {
    font-size: 13px;
  }

  /* 筛选栏 - 移动端横向滚动 */
  .filter-bar {
    top: 60px;
    padding: 12px 0;
  }
  .filter-inner {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 4px;
  }
  .filter-inner::-webkit-scrollbar {
    display: none;
  }
  .filter-btn {
    flex-shrink: 0;
    padding: 8px 14px;
    font-size: 12px;
  }
  .filter-label {
    flex-shrink: 0;
  }

  /* 主内容布局 - 移动端隐藏侧边栏 */
  .category-main {
    padding: 30px 0;
  }
  .category-layout {
    grid-template-columns: 1fr;
  }
  .cat-sidebar {
    display: none; /* 移动端隐藏侧边栏 */
  }

  /* 产品网格 - 移动端单列 */
  .products-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .cat-products-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
  }
  .sort-select {
    width: 100%;
  }

  /* 产品卡片 */
  .product-card {
    padding: 16px;
    gap: 12px;
  }
  .product-card-top {
    margin-bottom: 4px;
  }
  .product-icon-wrap {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }
  .product-card h4 {
    font-size: 15px;
    line-height: 1.4;
  }
  .product-desc {
    font-size: 12px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .product-meta {
    gap: 12px;
    font-size: 11px;
    flex-wrap: wrap;
  }
  .product-tags {
    flex-wrap: wrap;
    gap: 6px;
  }
  .case-tags .tag {
    padding: 4px 10px;
    font-size: 11px;
  }
  .product-actions {
    flex-direction: column;
    gap: 8px;
  }
  .product-actions .btn {
    width: 100%;
    padding: 12px !important;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  /* 页面标题区 */
  .page-hero {
    padding: 80px 16px 60px;
  }
  .page-hero::after {
    height: 30px;
    clip-path: ellipse(70% 100% at 50% 100%);
  }
  .page-hero h1 {
    font-size: 22px;
  }
  .page-hero p {
    font-size: 12px;
  }

  /* 筛选按钮更小 */
  .filter-btn {
    padding: 6px 12px;
    font-size: 11px;
  }

  /* 产品卡片 */
  .product-card {
    padding: 14px;
  }
  .product-card h4 {
    font-size: 14px;
  }
  .product-desc {
    font-size: 12px;
    -webkit-line-clamp: 2;
  }
  .product-meta {
    font-size: 10px;
    gap: 8px;
  }

  /* CTA横幅 */
  .cta-banner {
    padding: 24px 20px;
  }
  .cta-banner h4 {
    font-size: 16px;
  }
  .cta-banner p {
    font-size: 12px;
  }
}