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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* ========== Section Headers ========== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: #666;
}

.section-header.light h2 {
  color: #fff;
}

.section-header.light p {
  color: rgba(255,255,255,0.8);
}

.section-header .sub {
  font-size: 14px;
  margin-top: 4px;
  opacity: 0.7;
}

.section-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}

.section-actions.center {
  justify-content: center;
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #00d67e;
  color: #fff;
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0,214,126,0.3);
}

.btn-primary:hover {
  background: #00c06e;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,214,126,0.4);
}

.btn-green {
  display: inline-flex;
  align-items: center;
  background: #00d67e;
  color: #fff;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-green:hover {
  background: #00c06e;
  transform: translateY(-1px);
}

.btn-blue {
  display: inline-flex;
  align-items: center;
  background: #4f6ef7;
  color: #fff;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-blue:hover {
  background: #3d5ae0;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  border: 1px solid #ccc;
  color: #666;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  border-color: #4f6ef7;
  color: #4f6ef7;
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-outline-white:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}

.btn-link {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  transition: color 0.3s;
}

.btn-link:hover {
  color: #fff;
}

/* ========== Hero Section ========== */
.hero-section {
  background: linear-gradient(135deg, #4f6ef7 0%, #7b4ff0 50%, #a855f7 100%);
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.badge-new {
  display: inline-block;
  background: #00d67e;
  color: #fff;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 24px;
  line-height: 1.7;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.hero-features span {
  background: rgba(255,255,255,0.15);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  backdrop-filter: blur(4px);
}

.tag-new {
  display: inline-block;
  background: #fbbf24;
  color: #1a1a2e;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  font-style: normal;
  margin-left: 4px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Hero Visual */
.hero-visual {
  flex: 1;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 380px;
}

.hero-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.3;
}

.hero-circle.orange {
  width: 200px;
  height: 200px;
  background: #f97316;
  top: -30px;
  right: 20px;
  filter: blur(40px);
}

.hero-circle.blue {
  width: 160px;
  height: 160px;
  background: #4f6ef7;
  bottom: -20px;
  left: 40px;
  filter: blur(30px);
}

.hero-device-phone {
  position: absolute;
  left: 10px;
  top: 20px;
  z-index: 2;
}

.phone-frame {
  width: 140px;
  background: #1a1a2e;
  border-radius: 20px;
  padding: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.phone-header {
  background: #4f6ef7;
  padding: 8px;
  border-radius: 12px 12px 0 0;
  text-align: center;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
}

.phone-body {
  background: #fff;
  border-radius: 0 0 12px 12px;
  padding: 6px;
}

.phone-banner {
  height: 40px;
  background: linear-gradient(135deg, #4f6ef7, #a855f7);
  border-radius: 6px;
  margin-bottom: 6px;
}

.phone-item {
  height: 28px;
  background: #f5f5f5;
  border-radius: 4px;
  margin-bottom: 4px;
}

.hero-device-desktop {
  position: absolute;
  right: 10px;
  top: 30px;
  z-index: 1;
}

.desktop-frame {
  width: 280px;
  background: #1a1a2e;
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.desktop-topbar {
  display: flex;
  gap: 5px;
  padding: 6px 8px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #fbbf24; }
.dot.green { background: #22c55e; }

.desktop-body {
  display: flex;
  gap: 6px;
  background: #fff;
  border-radius: 4px;
  padding: 6px;
  min-height: 160px;
}

.desktop-sidebar {
  width: 40px;
  background: #f0f0f0;
  border-radius: 4px;
}

.desktop-main {
  flex: 1;
}

.desktop-banner {
  height: 30px;
  background: linear-gradient(135deg, #4f6ef7, #a855f7);
  border-radius: 4px;
  margin-bottom: 6px;
}

.desktop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.desktop-card {
  height: 30px;
  background: #f5f5f5;
  border-radius: 3px;
}

/* ========== Advantages Section ========== */
.advantages-section {
  padding: 80px 0;
  background: #fff;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.adv-card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 16px;
  padding: 32px 24px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.adv-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #4f6ef7, #a855f7);
  opacity: 0;
  transition: opacity 0.3s;
}

.adv-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(79,110,247,0.12);
  border-color: transparent;
}

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

.adv-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.icon-server { background: linear-gradient(135deg, #e0e7ff, #c7d2fe); }
.icon-server::after { content: '🖥️'; }
.icon-shield { background: linear-gradient(135deg, #dcfce7, #bbf7d0); }
.icon-shield::after { content: '🛡️'; }
.icon-operation { background: linear-gradient(135deg, #fef3c7, #fde68a); }
.icon-operation::after { content: '⚙️'; }
.icon-speed { background: linear-gradient(135deg, #fce7f3, #fbcfe8); }
.icon-speed::after { content: '⚡'; }
.icon-template { background: linear-gradient(135deg, #e0f2fe, #bae6fd); }
.icon-template::after { content: '🎨'; }
.icon-innovation { background: linear-gradient(135deg, #f3e8ff, #e9d5ff); }
.icon-innovation::after { content: '🚀'; }

.adv-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 8px;
}

.adv-card p {
  font-size: 14px;
  color: #888;
  line-height: 1.7;
}

/* ========== Solution Section ========== */
.solution-section {
  padding: 80px 0;
  background: #f0f4ff;
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}

.tab-btn {
  padding: 10px 28px;
  border: none;
  background: #fff;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 500;
  color: #666;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.tab-btn:hover {
  color: #4f6ef7;
}

.tab-btn.active {
  background: #4f6ef7;
  color: #fff;
  box-shadow: 0 4px 16px rgba(79,110,247,0.3);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active {
  display: block;
}

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

.solution-layout {
  display: flex;
  gap: 40px;
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.solution-left, .solution-right {
  flex: 1;
}

.solution-layout h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 24px;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.channel-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  background: #f8f9ff;
  border-radius: 12px;
  transition: all 0.3s;
}

.channel-item:hover {
  background: #eef1ff;
  transform: translateY(-2px);
}

.channel-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.wechat { background: #dcfce7; }
.wechat::after { content: '💬'; }
.weibo { background: #fee2e2; }
.weibo::after { content: '📢'; }
.gzh { background: #dcfce7; }
.gzh::after { content: '📰'; }
.site { background: #dbeafe; }
.site::after { content: '🌐'; }
.qq { background: #e0f2fe; }
.qq::after { content: '🐧'; }
.community { background: #f3e8ff; }
.community::after { content: '👥'; }

/* Retention tab icons */
.content-daily { background: #fef3c7; }
.content-daily::after { content: '📅'; }
.content-topic { background: #e0f2fe; }
.content-topic::after { content: '📋'; }
.content-brand { background: #fce7f3; }
.content-brand::after { content: '🏷️'; }
.content-inspect { background: #dcfce7; }
.content-inspect::after { content: '✅'; }
.content-rank { background: #fee2e2; }
.content-rank::after { content: '🔥'; }
.content-activity { background: #f3e8ff; }
.content-activity::after { content: '🎯'; }

/* Conversion tab icons */
.cvr-coupon { background: #fee2e2; }
.cvr-coupon::after { content: '🎫'; }
.cvr-flash { background: #fef3c7; }
.cvr-flash::after { content: '⚡'; }
.cvr-discount { background: #dcfce7; }
.cvr-discount::after { content: '💰'; }
.cvr-gift { background: #fce7f3; }
.cvr-gift::after { content: '🎁'; }
.cvr-half { background: #e0f2fe; }
.cvr-half::after { content: '🏷️'; }
.cvr-nine { background: #f3e8ff; }
.cvr-nine::after { content: '🛍️'; }

/* Repurchase tab icons */
.rep-push { background: #e0f2fe; }
.rep-push::after { content: '🔔'; }
.rep-member { background: #fef3c7; }
.rep-member::after { content: '👑'; }
.rep-point { background: #dcfce7; }
.rep-point::after { content: '⭐'; }
.rep-remind { background: #fee2e2; }
.rep-remind::after { content: '⏰'; }
.rep-exclusive { background: #f3e8ff; }
.rep-exclusive::after { content: '💎'; }
.rep-share { background: #fce7f3; }
.rep-share::after { content: '🔗'; }

/* Efficiency tab icons */
.eff-auto { background: #dcfce7; }
.eff-auto::after { content: '🤖'; }
.eff-batch { background: #e0f2fe; }
.eff-batch::after { content: '📦'; }
.eff-data { background: #fef3c7; }
.eff-data::after { content: '📊'; }
.eff-schedule { background: #fee2e2; }
.eff-schedule::after { content: '⏱️'; }
.eff-sync { background: #f3e8ff; }
.eff-sync::after { content: '🔄'; }
.eff-smart { background: #fce7f3; }
.eff-smart::after { content: '🧠'; }

.channel-item span {
  font-size: 13px;
  color: #555;
  font-weight: 500;
}

.customize-preview {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.mini-phone {
  width: 100px;
  background: #1a1a2e;
  border-radius: 14px;
  padding: 6px;
  flex-shrink: 0;
}

.mini-phone-header {
  height: 60px;
  background: linear-gradient(135deg, #4f6ef7, #a855f7);
  border-radius: 8px 8px 0 0;
}

.mini-phone-body {
  background: #fff;
  border-radius: 0 0 8px 8px;
  height: 80px;
}

.customize-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.customize-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #444;
}

.customize-item .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: #00d67e;
  color: #fff;
  border-radius: 50%;
  font-size: 12px;
  flex-shrink: 0;
}

/* ========== Exclusive Section ========== */
.exclusive-section {
  padding: 80px 0;
  background: #0f172a;
}

.exclusive-layout {
  display: flex;
  gap: 24px;
  align-items: stretch;
}

.exclusive-left, .exclusive-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exclusive-center {
  flex: 0 0 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ex-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 18px 16px;
  transition: all 0.3s;
}

.ex-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.ex-card-header {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ex-card-header.purple {
  color: #a78bfa;
}

.ex-card-header.yellow {
  color: #fbbf24;
}

.ex-badge {
  display: inline-block;
  background: #fbbf24;
  color: #1a1a2e;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}

.ex-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

/* Phone showcase */
.phone-showcase {
  display: flex;
  gap: 8px;
}

.showcase-phone {
  width: 80px;
  background: #1a1a2e;
  border-radius: 16px;
  padding: 4px;
  border: 2px solid rgba(255,255,255,0.1);
}

.showcase-phone-notch {
  width: 30px;
  height: 4px;
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
  margin: 4px auto;
}

.showcase-phone-screen {
  border-radius: 10px;
  overflow: hidden;
}

.screen-banner {
  height: 30px;
  background: linear-gradient(135deg, #a855f7, #6366f1);
}

.screen-banner.brand {
  background: linear-gradient(135deg, #f97316, #ef4444);
}

.screen-banner.flash {
  background: linear-gradient(135deg, #fbbf24, #f97316);
}

.screen-list {
  background: #fff;
  height: 60px;
}

/* ========== Audience Section ========== */
.audience-section {
  padding: 80px 0;
  background: #fff;
}

.audience-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.aud-card {
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.aud-card.blue {
  background: linear-gradient(135deg, #eef2ff, #e0e7ff);
  border: 1px solid #c7d2fe;
}

.aud-card.orange {
  background: linear-gradient(135deg, #fff7ed, #ffedd5);
  border: 1px solid #fed7aa;
}

.aud-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.aud-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.blogger { background: #dbeafe; }
.blogger::after { content: '👩‍💻'; }
.community { background: #e0f2fe; }
.community::after { content: '👥'; }
.webmaster { background: #fef3c7; }
.webmaster::after { content: '👨‍💻'; }
.mom { background: #fce7f3; }
.mom::after { content: '👩‍👧'; }

.aud-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 10px;
}

.aud-card p {
  font-size: 13px;
  color: #666;
  line-height: 1.7;
}

/* Audience Network */
.audience-network {
  position: relative;
  width: 360px;
  height: 360px;
  margin: 0 auto;
}

.network-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, #4f6ef7, #6366f1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(79,110,247,0.3);
  z-index: 2;
}

.network-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.network-node {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transform: translate(-50%, -50%) rotate(var(--angle)) translateY(-140px) rotate(calc(-1 * var(--angle)));
}

.node-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.n1::after { content: '🛒'; }
.n2::after { content: '⭐'; }
.n3::after { content: '🏪'; }
.n4::after { content: '📱'; }
.n5::after { content: '🎬'; }
.n6::after { content: '🏢'; }
.n7::after { content: '💼'; }

.network-node span {
  font-size: 12px;
  color: #555;
  font-weight: 500;
  white-space: nowrap;
}

.network-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 14px;
  color: #888;
}

/* ========== Activity Section ========== */
.activity-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #4f6ef7, #6366f1);
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.act-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s;
}

.act-card:hover {
  background: rgba(255,255,255,0.18);
  transform: translateY(-4px);
}

.act-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(255,255,255,0.15);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.holiday::after { content: '🎉'; }
.hotspot::after { content: '🔥'; }
.category::after { content: '📂'; }
.promo::after { content: '🏷️'; }

.act-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.hot-badge {
  display: inline-block;
  background: #ef4444;
  color: #fff;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}

.act-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

/* ========== AI Section ========== */
.ai-section {
  padding: 80px 0;
  background: #f0f4ff;
}

.ai-diagram {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  min-height: 480px;
}

.ai-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
}

.ai-engine {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: #fff;
  padding: 24px 32px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(124,58,237,0.3);
}

.ai-engine span {
  display: block;
  font-size: 16px;
  font-weight: 700;
}

.ai-engine small {
  display: block;
  font-size: 12px;
  opacity: 0.8;
  margin-top: 4px;
}

.ai-module {
  position: absolute;
  display: flex;
  gap: 16px;
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
  max-width: 280px;
  transition: all 0.3s;
}

.ai-module:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}

.ai-module.left-top {
  top: 20px;
  left: 0;
}

.ai-module.left-bottom {
  bottom: 20px;
  left: 0;
}

.ai-module.right-top {
  top: 20px;
  right: 0;
}

.ai-module.right-bottom {
  bottom: 20px;
  right: 0;
}

.ai-mod-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.mod1 { background: #f3e8ff; }
.mod1::after { content: '📊'; }
.mod2 { background: #e0f2fe; }
.mod2::after { content: '🧮'; }
.mod3 { background: #dcfce7; }
.mod3::after { content: '🔍'; }
.mod4 { background: #fef3c7; }
.mod4::after { content: '📤'; }

.ai-mod-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 6px;
}

.ai-mod-content p {
  font-size: 12px;
  color: #888;
  line-height: 1.6;
}

/* AI connecting lines */
.ai-line {
  position: absolute;
  border: none;
  background: #c7d2fe;
  z-index: 1;
}

.ai-line.line-lt {
  top: 100px;
  left: 280px;
  width: 80px;
  height: 2px;
  transform: rotate(-15deg);
}

.ai-line.line-lb {
  bottom: 100px;
  left: 280px;
  width: 80px;
  height: 2px;
  transform: rotate(15deg);
}

.ai-line.line-rt {
  top: 100px;
  right: 280px;
  width: 80px;
  height: 2px;
  transform: rotate(15deg);
}

.ai-line.line-rb {
  bottom: 100px;
  right: 280px;
  width: 80px;
  height: 2px;
  transform: rotate(-15deg);
}

/* ========== Brand Section ========== */
.brand-section {
  padding: 80px 0;
  background: #fff;
}

.brand-slogan {
  text-align: center;
  margin-bottom: 48px;
}

.brand-slogan h2 {
  font-size: 36px;
  font-weight: 800;
  color: #1a1a2e;
  margin-bottom: 8px;
}

.brand-slogan p {
  font-size: 16px;
  color: #888;
}

.brand-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
}

.stat-item {
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: #4f6ef7;
  margin-bottom: 4px;
}

.stat-item span {
  font-size: 14px;
  color: #888;
}

.brand-capabilities {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin-bottom: 40px;
}

.cap-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.cap-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.cap1 { background: #e0f2fe; }
.cap1::after { content: '🔄'; }
.cap2 { background: #dcfce7; }
.cap2::after { content: '✅'; }
.cap3 { background: #fef3c7; }
.cap3::after { content: '🏗️'; }
.cap4 { background: #fce7f3; }
.cap4::after { content: '🚀'; }
.cap5 { background: #f3e8ff; }
.cap5::after { content: '👨‍💻'; }

.cap-item span {
  font-size: 13px;
  color: #555;
  font-weight: 500;
}

/* ========== Floating Sidebar ========== */
.floating-sidebar {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
}

.float-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: #fff;
  border-radius: 12px;
  padding: 12px 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: all 0.3s;
  min-width: 64px;
}

.float-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}

.float-icon {
  font-size: 22px;
}

.float-btn span {
  font-size: 11px;
  color: #555;
  white-space: nowrap;
  font-weight: 500;
}

.float-btn.wechat-consult .float-icon {
  background: #00d67e;
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-features {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-visual {
    width: 100%;
    min-height: 300px;
  }

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

  .solution-layout {
    flex-direction: column;
  }

  .exclusive-layout {
    flex-direction: column;
  }

  .exclusive-center {
    flex: 0 0 auto;
  }

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

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

  .ai-diagram {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

  .ai-module {
    position: static !important;
    max-width: 100%;
  }

  .ai-center {
    position: static !important;
    transform: none !important;
  }

  .ai-line {
    display: none;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }

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

  .audience-cards {
    grid-template-columns: 1fr;
  }

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

  .brand-stats {
    flex-wrap: wrap;
    gap: 24px;
  }

  .brand-capabilities {
    flex-wrap: wrap;
    gap: 20px;
  }

  .tabs {
    flex-wrap: wrap;
  }

  .floating-sidebar {
    right: 8px;
  }

  .float-btn span {
    font-size: 10px;
  }

  .network-node span {
    font-size: 10px;
  }
}