/* ============================================================
   海角 - hj889.cn | 主样式文件
   品牌色: 深海蓝 #1a3a5c / 珊瑚红 #e84d6c / 青碧 #0d9488
   ============================================================ */

/* ---------- CSS变量 ---------- */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --accent: #e84d6c;
  --accent-light: #f06080;
  --teal: #0d9488;
  --teal-light: #14b8a6;
  --bg: #f8fafc;
  --bg-card: #1e2a3a;
  --text: #1a2332;
  --text-secondary: #5a6a7a;
  --border: #e2e8f0;
  --border-dark: rgba(255,255,255,0.1);
  --shadow: 0 4px 20px rgba(26,58,92,0.10);
  --shadow-lg: 0 8px 40px rgba(26,58,92,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }
input, textarea, select { font-family: var(--font); }

/* ---------- 容器 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部公告栏 ---------- */
.top-bar {
  background: var(--primary);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.top-bar strong { color: #fff; }
.top-bar-links { display: flex; gap: 16px; }
.top-bar-links a { color: rgba(255,255,255,0.7); font-size: 12px; }
.top-bar-links a:hover { color: var(--accent); }

/* ---------- 头部 ---------- */
.site-header {
  background: rgba(26,58,92,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
  transition: box-shadow var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 0;
  flex-wrap: nowrap;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: contain;
  background: rgba(255,255,255,0.1);
}
.logo-text { display: flex; flex-direction: column; }
.logo-name {
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 2px;
  line-height: 1.2;
}
.logo-sub {
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 1px;
  line-height: 1;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  flex-wrap: wrap;
}
.main-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: #fff;
  background: rgba(255,255,255,0.12);
}
.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}
.header-search input {
  padding: 7px 14px;
  border: 1px solid rgba(255,255,255,0.2);
  border-right: none;
  border-radius: 20px 0 0 20px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 13px;
  width: 180px;
  outline: none;
  transition: all var(--transition);
}
.header-search input::placeholder { color: rgba(255,255,255,0.5); }
.header-search input:focus { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.4); }
.search-btn {
  padding: 7px 14px;
  background: var(--accent);
  color: #fff;
  border-radius: 0 20px 20px 0;
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition);
}
.search-btn:hover { background: var(--accent-light); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 搜索栏 ---------- */
.search-bar-section {
  background: var(--primary-light);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.search-bar-inner {
  display: flex;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}
.search-bar-inner input {
  flex: 1;
  padding: 10px 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-right: none;
  border-radius: 25px 0 0 25px;
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: all var(--transition);
}
.search-bar-inner input::placeholder { color: rgba(255,255,255,0.55); }
.search-bar-inner input:focus { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.5); }
.search-bar-inner button {
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: 0 25px 25px 0;
  font-size: 14px;
  font-weight: 700;
  transition: background var(--transition);
}
.search-bar-inner button:hover { background: var(--accent-light); }

/* ---------- 英雄区 ---------- */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-section:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,58,92,0.88) 0%, rgba(26,58,92,0.65) 50%, rgba(232,77,108,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: 60px 0;
}
.hero-badge {
  display: inline-block;
  background: rgba(232,77,108,0.9);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.hero-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 18px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero-title span { color: var(--accent); }
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 560px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(232,77,108,0.4);
}
.btn-primary:hover {
  background: var(--accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(232,77,108,0.5);
}
.btn-outline {
  display: inline-block;
  padding: 12px 28px;
  border: 2px solid rgba(255,255,255,0.6);
  color: #fff;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 700;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.hero-stat-num {
  font-size: 22px;
  font-weight: 900;
  color: var(--accent);
}
.hero-stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-top: 2px;
}

/* ---------- 弹幕栏 ---------- */
.danmu-bar {
  background: var(--primary);
  border-radius: var(--radius);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  overflow: hidden;
}
.danmu-label {
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}
.danmu-scroll { overflow: hidden; flex: 1; }
.danmu-text {
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  white-space: nowrap;
  animation: danmuScroll 20s linear infinite;
  display: inline-block;
}
@keyframes danmuScroll {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

/* ---------- 数据统计 ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
.stat-item:hover { transform: translateY(-4px); }
.stat-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}
.stat-num span { font-size: 16px; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }

/* ---------- 通用Section ---------- */
.section { padding: 70px 0; }
.section-gray { background: var(--bg); }
.section-dark { background: var(--primary); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  background: rgba(232,77,108,0.08);
  padding: 4px 14px;
  border-radius: 12px;
  margin-bottom: 12px;
  border: 1px solid rgba(232,77,108,0.2);
}
.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-tag { color: var(--accent); background: rgba(232,77,108,0.15); }
.section-desc { font-size: 15px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; line-height: 1.8; }
.section-dark .section-desc { color: rgba(255,255,255,0.65); }

/* ---------- 视频卡片 ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a2332;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.35); }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--primary);
  margin-left: 4px;
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
}
.live-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: #fff;
  border-radius: 50%;
  margin-right: 4px;
  animation: livePulse 1.2s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.video-info { padding: 16px; }
.video-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.video-stats {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

/* ---------- 功能卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.feature-icon {
  width: 50px;
  height: 50px;
  background: rgba(26,58,92,0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}
.feature-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}
.feature-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- 照片网格 ---------- */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.photo-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
}
.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s ease;
}
.photo-card:hover img { transform: scale(1.08); }
.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,58,92,0.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition);
}
.photo-card:hover .photo-overlay { opacity: 1; }
.photo-label {
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

/* ---------- AI布局 ---------- */
@media (max-width: 768px) {
  .ai-layout { grid-template-columns: 1fr !important; }
}

/* ---------- 专家卡片 ---------- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.expert-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: top;
}
.expert-info { padding: 18px; }
.expert-name { font-size: 17px; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.expert-role { font-size: 12px; color: var(--accent); font-weight: 600; margin-bottom: 10px; }
.expert-bio { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.award-tag {
  font-size: 11px;
  background: rgba(26,58,92,0.07);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 10px;
  font-weight: 600;
}
.expert-btns { display: flex; gap: 8px; }
.btn-sm { padding: 6px 14px; border-radius: 16px; font-size: 12px; font-weight: 700; transition: all var(--transition); }
.btn-primary-sm { background: var(--primary); color: #fff; }
.btn-primary-sm:hover { background: var(--primary-light); color: #fff; }
.btn-outline-sm { border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline-sm:hover { background: var(--primary); color: #fff; }

/* ---------- 合作伙伴 ---------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.partner-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  transition: all var(--transition);
}
.partner-item:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ---------- 步骤列表 ---------- */
.steps-list { display: flex; flex-direction: column; gap: 16px; }
.step-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}
.step-num {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 900;
  flex-shrink: 0;
}
.step-content h4 { font-size: 15px; font-weight: 800; color: var(--primary); margin-bottom: 6px; }
.step-content p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 评价卡片 ---------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border-top: 3px solid var(--accent);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.review-stars { color: #f59e0b; font-size: 16px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; font-style: italic; }
.review-user { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name { font-size: 13px; font-weight: 700; color: var(--primary); }
.review-date { font-size: 11px; color: var(--text-secondary); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  transition: background var(--transition);
}
.faq-question:hover { background: rgba(26,58,92,0.04); }
.faq-icon {
  width: 26px;
  height: 26px;
  background: rgba(26,58,92,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-item.open .faq-icon { background: var(--accent); color: #fff; transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 联系卡片 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.contact-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover { background: rgba(255,255,255,0.14); transform: translateY(-2px); }
.contact-icon { font-size: 28px; margin-bottom: 8px; }
.contact-label { font-size: 12px; color: rgba(255,255,255,0.55); margin-bottom: 6px; }
.contact-value { font-size: 14px; font-weight: 700; color: #fff; }

/* ---------- 分享栏 ---------- */
.share-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.share-label { font-size: 14px; color: var(--text-secondary); font-weight: 600; }
.share-btn {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  transition: all var(--transition);
  border: 1.5px solid var(--border);
  color: var(--text);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); }

/* ---------- 标签云 ---------- */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(26,58,92,0.07);
  color: var(--primary);
  border-radius: 14px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid rgba(26,58,92,0.12);
  transition: all var(--transition);
}
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 二维码 ---------- */
.qr-wrap { text-align: center; }
.qr-wrap img {
  width: 120px;
  height: 120px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.2);
}
.qr-label {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-top: 8px;
  line-height: 1.5;
}

/* ---------- 底部 ---------- */
.site-footer { background: var(--primary); padding: 60px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .footer-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-brand .footer-desc strong { color: rgba(255,255,255,0.8); }
.footer-qr-row { display: flex; gap: 20px; }
.footer-col-title {
  font-size: 14px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent); }
.update-time { font-size: 12px; color: rgba(255,255,255,0.35); }

/* ---------- 内页Banner ---------- */
.inner-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--accent) 100%);
  padding: 50px 0;
  text-align: center;
}
.inner-banner-content h1 {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 10px;
}
.inner-banner-content p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
}

/* ---------- 面包屑 ---------- */
.breadcrumb { background: #f1f5f9; border-bottom: 1px solid var(--border); padding: 10px 0; }
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}
.breadcrumb-list a { color: var(--primary); }
.breadcrumb-list a:hover { color: var(--accent); }
.sep { color: var(--text-secondary); }

/* ---------- 内页内容 ---------- */
.inner-content { padding: 50px 0; }
.inner-content h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin: 32px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
}
.inner-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin: 24px 0 10px;
}
.inner-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 14px;
}
.intro-box {
  background: linear-gradient(135deg, rgba(26,58,92,0.05), rgba(232,77,108,0.05));
  border: 1px solid rgba(26,58,92,0.1);
  border-radius: var(--radius);
  padding: 22px 26px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 32px;
}
.intro-box strong { color: var(--primary); }

/* ---------- 动画 ---------- */
.fade-in-up {
  animation: fadeInUp 0.6s ease both;
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .partner-grid { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 16px 20px;
    gap: 4px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; border-radius: 8px; }
  .header-search { display: none; }
  .site-header .header-inner { position: relative; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-content { padding: 40px 0; }
  .hero-stats { gap: 16px; }
  .section { padding: 48px 0; }
  .ai-layout { grid-template-columns: 1fr !important; }
}
@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { text-align: center; }
}

/* ---------- 打印优化 ---------- */
@media print {
  .site-header, .top-bar, .search-bar-section, .site-footer { display: none; }
  .hero-section { min-height: auto; }
  .hero-bg, .hero-overlay { display: none; }
  .hero-content { color: #000; }
}