/* ===================================================
   海角 主样式文件 | shayrkj.cn
   海角传媒 - 影视传媒与视频社区平台
   完全原创设计
   =================================================== */

/* ---- CSS变量 ---- */
:root {
  --bg-dark: #080f1a;
  --bg-medium: #0d1b2a;
  --bg-light: #132236;
  --card-bg: #0f1e30;
  --card-border: rgba(255,255,255,0.07);
  --accent: #e8a020;
  --accent-hover: #f0b030;
  --accent-light: rgba(232,160,32,0.12);
  --blue-primary: #1a6fb5;
  --blue-light: #2a8fd5;
  --red-live: #e84040;
  --text-primary: #e8f0f8;
  --text-secondary: #a0b4c8;
  --text-muted: #607080;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.35);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.5);
  --transition: all 0.22s ease;
  --font-main: '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: 15px; }
body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-main); }

/* ---- 顶部公告 ---- */
.top-notice {
  background: linear-gradient(90deg, #0d2a4a, #1a3a5c, #0d2a4a);
  color: var(--text-secondary);
  font-size: 12px;
  text-align: center;
  padding: 7px 16px;
  border-bottom: 1px solid var(--card-border);
}
.top-notice a { color: var(--accent); font-weight: 600; }

/* ---- 导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(8,15,26,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-primary);
}
.site-logo img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
}
.logo-text { display: flex; flex-direction: column; }
.logo-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  letter-spacing: 2px;
}
.logo-sub { font-size: 10px; color: var(--text-muted); letter-spacing: 1px; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary);
  background: var(--bg-light);
}
.main-nav a.active { color: var(--accent); font-weight: 600; }
.nav-live {
  background: var(--red-live) !important;
  color: #fff !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
}
.nav-live:hover { opacity: 0.85; }
.nav-actions { display: flex; gap: 8px; flex-shrink: 0; }
.btn-login, .btn-register {
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
}
.btn-login {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
}
.btn-login:hover { background: var(--bg-light); color: var(--text-primary); }
.btn-register {
  background: linear-gradient(135deg, var(--accent), #c07010);
  color: #fff;
}
.btn-register:hover { opacity: 0.9; transform: translateY(-1px); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- 移动端菜单 ---- */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg-medium);
  border-bottom: 1px solid var(--card-border);
  padding: 12px 20px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--card-border);
}
.mobile-menu a:last-child { border-bottom: none; }

/* ---- 搜索栏 ---- */
.search-bar-wrap {
  background: var(--bg-medium);
  border-bottom: 1px solid var(--card-border);
  padding: 14px 20px;
}
.search-bar-inner {
  max-width: 800px;
  margin: 0 auto;
}
.search-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
}
.search-tab {
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.search-tab.active, .search-tab:hover {
  background: var(--accent-light);
  color: var(--accent);
}
.search-form {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.search-input {
  flex: 1;
  background: var(--bg-light);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-main);
  outline: none;
  transition: var(--transition);
}
.search-input:focus { border-color: var(--accent); background: #162840; }
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  background: linear-gradient(135deg, var(--accent), #c07010);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-btn:hover { opacity: 0.9; }
.search-hot { font-size: 12px; color: var(--text-muted); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.search-hot a { color: var(--text-muted); font-size: 12px; }
.search-hot a:hover { color: var(--accent); }

/* ---- 容器 ---- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Hero ---- */
.hero-section {
  position: relative;
  height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,15,26,0.92) 0%, rgba(13,27,42,0.75) 60%, rgba(8,15,26,0.5) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}
.hero-badge {
  display: inline-block;
  background: var(--red-live);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.hero-title {
  font-size: 46px;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.hero-title span { color: var(--accent); }
.hero-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 28px;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
}
.hero-stat-label { font-size: 11px; color: rgba(255,255,255,0.55); margin-top: 2px; }
.hero-actions { display: flex; gap: 14px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #c07010);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  border: none;
  transition: var(--transition);
  display: inline-block;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,160,32,0.4); color: #fff; }
.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.2);
  transition: var(--transition);
  display: inline-block;
  backdrop-filter: blur(4px);
}
.btn-secondary:hover { background: rgba(255,255,255,0.18); color: #fff; }

/* ---- 统计数据 ---- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--accent-light); transform: translateY(-2px); }
.stat-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ---- 分类标签 ---- */
.category-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.category-tab {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-light);
  border: 1px solid var(--card-border);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.category-tab.active, .category-tab:hover {
  background: var(--accent-light);
  color: var(--accent);
  border-color: rgba(232,160,32,0.3);
}

/* ---- Section ---- */
.section { padding: 32px 0; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  padding-left: 14px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
}
.section-more {
  font-size: 13px;
  color: var(--text-muted);
}
.section-more:hover { color: var(--accent); }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.video-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,160,32,0.25);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-light);
}
.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 0.25s ease;
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.45); }
.play-icon {
  width: 48px;
  height: 48px;
  background: rgba(232,160,32,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.25s ease;
}
.play-icon::after {
  content: '';
  border-left: 16px solid #fff;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 3px;
}
.live-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--red-live);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
.live-viewers {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 3px;
}
.video-info { padding: 12px; }
.video-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-muted);
}
.video-author { color: var(--text-muted); }
.video-stats { display: flex; gap: 8px; }
.video-stat { color: var(--text-muted); }

/* ---- 美图网格 ---- */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.photo-card {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
}
.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.photo-card:hover img { transform: scale(1.08); }
.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 12px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  transform: translateY(100%);
  transition: transform 0.3s ease;
}
.photo-card:hover .photo-overlay { transform: translateY(0); }
.photo-name { font-size: 13px; font-weight: 600; color: #fff; margin-bottom: 4px; }
.photo-tag { font-size: 11px; color: rgba(255,255,255,0.65); }

/* ---- AI区块 ---- */
.ai-section {
  background: linear-gradient(135deg, #0a1828 0%, #0d2240 50%, #0a1828 100%);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ai-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  position: relative;
}
.ai-card:hover {
  background: rgba(232,160,32,0.05);
  border-color: rgba(232,160,32,0.25);
  transform: translateY(-3px);
}
.ai-icon { font-size: 36px; margin-bottom: 14px; }
.ai-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.ai-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}
.ai-features { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---- 标签 ---- */
.tag {
  background: var(--accent-light);
  color: var(--accent);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(232,160,32,0.2);
}

/* ---- 专家 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  border-color: rgba(232,160,32,0.3);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--accent);
}
.expert-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.expert-title {
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}
.expert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: center;
  margin-bottom: 14px;
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
}
.btn-sm-primary {
  background: linear-gradient(135deg, var(--accent), #c07010);
  color: #fff;
}
.btn-sm-primary:hover { opacity: 0.9; }
.btn-sm-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
  display: inline-block;
}
.btn-sm-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ---- 步骤 ---- */
.how-to-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.step-card:hover { border-color: rgba(232,160,32,0.3); transform: translateY(-3px); }
.step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), #c07010);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 14px;
}
.step-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.step-desc { font-size: 12px; color: var(--text-secondary); line-height: 1.7; }

/* ---- 合作品牌 ---- */
.partners-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--accent); color: var(--accent); }

/* ---- 联系 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.contact-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--card-border);
}
.contact-info-list { display: flex; flex-direction: column; gap: 12px; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}
.contact-info-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.qr-row { display: flex; gap: 24px; justify-content: center; margin-top: 16px; }
.qr-item { text-align: center; }
.qr-item img {
  width: 90px;
  height: 90px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  object-fit: cover;
  margin: 0 auto 6px;
}
.qr-label { font-size: 11px; color: var(--text-muted); }

/* ---- 评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition);
}
.review-card:hover { border-color: rgba(232,160,32,0.25); transform: translateY(-2px); }
.review-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.review-avatar {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), #c07010);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-user { flex: 1; }
.review-name { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.review-date { font-size: 11px; color: var(--text-muted); }
.review-stars { color: var(--accent); font-size: 12px; }
.review-text { font-size: 12px; color: var(--text-secondary); line-height: 1.7; }

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(232,160,32,0.3); }
.faq-question {
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-question::after {
  content: '+';
  font-size: 20px;
  color: var(--accent);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after { 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 p {
  padding: 0 20px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---- 分享栏 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn {
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.share-wechat { background: rgba(7,193,96,0.15); color: #07c160; }
.share-weibo { background: rgba(230,22,45,0.12); color: #e6162d; }
.share-douyin { background: rgba(255,255,255,0.07); color: var(--text-secondary); }
.share-bilibili { background: rgba(0,161,214,0.12); color: #00a1d6; }
.share-btn:hover { opacity: 0.8; transform: translateY(-1px); }

/* ---- 页脚 ---- */
.site-footer {
  background: var(--bg-medium);
  border-top: 1px solid var(--card-border);
  padding: 40px 0 0;
  margin-top: 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 24px;
}
.footer-brand-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 14px 0;
}
.footer-social {
  display: flex;
  gap: 8px;
}
.footer-social a {
  width: 32px;
  height: 32px;
  background: var(--bg-light);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-social a:hover { border-color: var(--accent); color: var(--accent); }
.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 12px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-copy p { font-size: 12px; color: var(--text-muted); }
.footer-copy a { color: var(--text-muted); }
.footer-copy a:hover { color: var(--accent); }
.footer-update { font-size: 12px; color: var(--text-muted); }

/* ---- 页面Hero ---- */
.page-hero {
  background: linear-gradient(135deg, #0a1828, #0d2240);
  border-bottom: 1px solid var(--card-border);
  padding: 36px 0 28px;
}
.page-hero-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 10px 0 8px;
}
.page-hero-desc { font-size: 14px; color: var(--text-secondary); }

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb strong { color: var(--text-secondary); }

/* ---- 侧边栏布局 ---- */
.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
  align-items: start;
}
.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 16px;
}
.sidebar-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--card-border);
}

/* ---- 响应式 ---- */
@media (max-width: 1100px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .reviews-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .main-nav { display: none; }
  .nav-actions { display: none; }
  .hamburger { display: flex; }
  .hero-title { font-size: 32px; }
  .hero-section { height: 420px; }
  .hero-stats { gap: 18px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .how-to-steps { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .sidebar-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 560px) {
  .hero-title { font-size: 24px; }
  .hero-section { height: 360px; }
  .hero-stats { flex-wrap: wrap; gap: 14px; }
  .video-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .how-to-steps { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .hero-content { padding: 0 20px; }
  .search-bar-wrap { padding: 10px 12px; }
}