/* =============================================
   海角网 - 主样式文件
   hmstyq.cn | HAIJIAO MEDIA
   ============================================= */

/* ---- CSS变量 / 设计系统 ---- */
:root {
  --color-primary: #0d2b4e;
  --color-secondary: #1a4a7a;
  --color-accent: #f0a500;
  --color-accent-light: #ffc840;
  --color-bg: #f5f7fa;
  --color-bg-dark: #0a1628;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-white: #ffffff;
  --color-border: #e5e7eb;
  --color-card-bg: #ffffff;
  --color-red: #e53e3e;
  --color-green: #38a169;
  --color-purple: #7c3aed;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --transition: 0.25s ease;
  --max-width: 1280px;
}

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

/* ---- 工具类 ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.hidden { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---- 标题系统 ---- */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}
.section-header { margin-bottom: 48px; }
.section-header .section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: 2px;
  margin-top: 12px;
}
.section-header.text-center .section-title::after { margin: 12px auto 0; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(240,165,0,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(240,165,0,0.45); }
.btn-outline {
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}
.btn-outline:hover { background: var(--color-accent); color: var(--color-primary); }
.btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-dark:hover { background: var(--color-secondary); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--color-primary);
  color: rgba(255,255,255,0.85);
  font-size: 0.82rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.top-bar-notice { display: flex; align-items: center; gap: 8px; }
.top-bar-links { display: flex; align-items: center; gap: 16px; }
.top-bar-links a { color: rgba(255,255,255,0.75); font-size: 0.82rem; }
.top-bar-links a:hover { color: var(--color-accent); }

/* ---- 导航栏 ---- */
.navbar {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.navbar-brand img.site-favicon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}
.navbar-brand img.site-logo {
  height: 44px;
  width: auto;
}
.navbar-brand .brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}
.navbar-brand .brand-name span { color: var(--color-accent); }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
  background: rgba(240,165,0,0.08);
}
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
  z-index: 200;
  border: 1px solid var(--color-border);
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 0.88rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { color: var(--color-accent); background: var(--color-bg); }
.navbar-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---- 搜索框 ---- */
.search-bar-wrapper {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  padding: 16px 0;
  border-bottom: 3px solid var(--color-accent);
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}
.search-bar-inner .search-label {
  color: rgba(255,255,255,0.9);
  font-size: 0.9rem;
  white-space: nowrap;
  font-weight: 600;
}
.search-input-wrap {
  flex: 1;
  display: flex;
  background: var(--color-white);
  border-radius: 40px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.search-input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  padding: 11px 20px;
  font-size: 0.95rem;
  color: var(--color-text);
  background: transparent;
}
.search-input-wrap button {
  background: var(--color-accent);
  color: var(--color-primary);
  border: none;
  padding: 11px 24px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
}
.search-input-wrap button:hover { background: var(--color-accent-light); }
.search-hot-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; justify-content: center; }
.search-hot-tags span { color: rgba(255,255,255,0.7); font-size: 0.8rem; }
.search-hot-tags a {
  color: rgba(255,255,255,0.85);
  font-size: 0.8rem;
  background: rgba(255,255,255,0.12);
  padding: 3px 10px;
  border-radius: 20px;
  transition: all var(--transition);
}
.search-hot-tags a:hover { background: var(--color-accent); color: var(--color-primary); }

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 12px 0;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-text); }

/* ---- 英雄区 / Banner ---- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-bg-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
  transition: opacity 0.5s;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.85) 40%, rgba(26,74,122,0.6) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  color: var(--color-white);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(240,165,0,0.2);
  border: 1px solid rgba(240,165,0,0.4);
  color: var(--color-accent);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--color-white);
}
.hero h1 .highlight { color: var(--color-accent); }
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-accent);
  display: block;
}
.hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.65); }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0a1628;
}
.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(0,0,0,0.3);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.video-play-btn svg {
  width: 56px;
  height: 56px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5));
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: var(--color-white);
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-badge.live { background: var(--color-red); color: var(--color-white); }
.video-badge.hot { background: #ff6b35; color: var(--color-white); }
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.video-author { display: flex; align-items: center; gap: 6px; }
.video-author-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  object-fit: cover;
}
.video-stats { display: flex; align-items: center; gap: 12px; }
.video-stat { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.video-tag {
  font-size: 0.72rem;
  color: var(--color-secondary);
  background: rgba(26,74,122,0.08);
  padding: 2px 8px;
  border-radius: 12px;
}

/* ---- 分类标签栏 ---- */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.category-tab {
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
}
.category-tab:hover, .category-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ---- 功能模块卡片 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}
.feature-icon.blue { background: rgba(13,43,78,0.1); }
.feature-icon.gold { background: rgba(240,165,0,0.12); }
.feature-icon.purple { background: rgba(124,58,237,0.1); }
.feature-icon.green { background: rgba(56,161,105,0.1); }
.feature-icon.red { background: rgba(229,62,62,0.1); }
.feature-title { font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.feature-desc { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; }

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.expert-photo {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 1.1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 4px; }
.expert-title { font-size: 0.85rem; color: var(--color-accent); font-weight: 600; margin-bottom: 10px; }
.expert-bio { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.expert-award {
  font-size: 0.75rem;
  background: rgba(240,165,0,0.1);
  color: var(--color-accent);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(240,165,0,0.25);
}
.expert-actions { display: flex; gap: 8px; }
.expert-social { display: flex; gap: 8px; margin-top: 10px; }
.expert-social a {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.expert-social a:hover { background: var(--color-primary); color: var(--color-white); }

/* ---- 用户评论 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  flex-shrink: 0;
}
.review-user-info .user-name { font-size: 0.95rem; font-weight: 600; color: var(--color-text); }
.review-user-info .user-label { font-size: 0.78rem; color: var(--color-text-muted); }
.review-stars { display: flex; gap: 2px; color: var(--color-accent); font-size: 0.9rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--color-text); line-height: 1.7; }
.review-date { font-size: 0.78rem; color: var(--color-text-muted); margin-top: 10px; }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  gap: 12px;
}
.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(240,165,0,0.12);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ---- 合作品牌Logo墙 ---- */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: center;
}
.partner-logo-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 28px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
  transition: all var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-logo-item:hover { border-color: var(--color-accent); color: var(--color-primary); box-shadow: var(--shadow-sm); }

/* ---- 联系区 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}
.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(13,43,78,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-label { font-size: 0.78rem; color: var(--color-text-muted); margin-bottom: 2px; }
.contact-value { font-size: 0.92rem; font-weight: 600; color: var(--color-text); }
.qrcode-group { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.qrcode-item { text-align: center; }
.qrcode-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); }
.qrcode-item p { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 8px; }

/* ---- 社区入口 ---- */
.community-entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.community-entry-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  cursor: pointer;
}
.community-entry-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.community-entry-icon { font-size: 2rem; margin-bottom: 10px; }
.community-entry-title { font-size: 0.9rem; font-weight: 600; color: var(--color-primary); margin-bottom: 4px; }
.community-entry-desc { font-size: 0.78rem; color: var(--color-text-muted); }

/* ---- 分享按钮 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-bar .share-label { font-size: 0.88rem; color: var(--color-text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.share-btn.wechat { background: #07c160; color: #fff; }
.share-btn.weibo { background: #e6162d; color: #fff; }
.share-btn.douyin { background: #000; color: #fff; }
.share-btn.bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ---- 页脚 ---- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.75);
  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(255,255,255,0.08);
}
.footer-brand .brand-logo { height: 44px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand .brand-desc { font-size: 0.85rem; line-height: 1.8; color: rgba(255,255,255,0.6); margin-bottom: 20px; }
.footer-col-title { font-size: 0.95rem; font-weight: 700; color: var(--color-white); margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.85rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--color-accent); }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--color-accent); color: var(--color-primary); }

/* ---- 统计数字区 ---- */
.stats-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  padding: 56px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item {}
.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-accent);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { font-size: 0.88rem; color: rgba(255,255,255,0.75); }

/* ---- How-To 指南 ---- */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step-counter;
}
.howto-step {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  text-align: center;
  border: 1px solid var(--color-border);
  position: relative;
  counter-increment: step-counter;
  transition: all var(--transition);
}
.howto-step:hover { box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.howto-step::before {
  content: counter(step-counter);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.howto-icon { font-size: 2rem; margin-bottom: 14px; }
.howto-title { font-size: 0.95rem; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.howto-desc { font-size: 0.83rem; color: var(--color-text-muted); line-height: 1.6; }

/* ---- 图片展示区 ---- */
.photo-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.photo-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
  position: relative;
}
.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.photo-item:hover img { transform: scale(1.06); }
.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 12px;
}
.photo-item:hover .photo-overlay { opacity: 1; }
.photo-overlay span { color: var(--color-white); font-size: 0.82rem; }

/* ---- 分页 ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}
.tag-primary { background: rgba(13,43,78,0.08); color: var(--color-primary); }
.tag-accent { background: rgba(240,165,0,0.12); color: var(--color-accent); }
.tag-red { background: rgba(229,62,62,0.1); color: var(--color-red); }
.tag-green { background: rgba(56,161,105,0.1); color: var(--color-green); }

/* ---- 通知条 ---- */
.notice-bar {
  background: rgba(240,165,0,0.1);
  border-left: 4px solid var(--color-accent);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---- 懒加载占位 ---- */
.lazy-placeholder {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }
  .navbar-nav { display: none; }
  .navbar-toggle { display: flex; }
  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    gap: 4px;
  }
  .navbar-nav.open .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-bg);
    margin-top: 4px;
    border-radius: var(--radius-sm);
  }
  .hero { min-height: 420px; }
  .hero h1 { font-size: 1.6rem; }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 1.2rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .top-bar .container { flex-direction: column; gap: 4px; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .expert-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .search-bar-inner { flex-direction: column; gap: 8px; }
  .search-bar-inner .search-label { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .hero-actions { flex-direction: column; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
}

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

/* ---- 视频模态框 ---- */
.video-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}
.video-modal.open { opacity: 1; visibility: visible; }
.video-modal-inner {
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 860px;
  width: 100%;
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition);
}
.video-modal-close:hover { background: rgba(255,255,255,0.3); }
.video-modal video { width: 100%; display: block; }

/* ---- 回到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 500;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-accent); color: var(--color-primary); transform: translateY(-3px); }

/* ---- 内页通用 ---- */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  padding: 56px 0;
  color: var(--color-white);
}
.page-hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.page-hero p { font-size: 1rem; color: rgba(255,255,255,0.75); }

/* ---- 文章卡片 ---- */
.article-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.article-thumb { aspect-ratio: 16/9; overflow: hidden; }
.article-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.article-category { font-size: 0.75rem; font-weight: 700; color: var(--color-accent); text-transform: uppercase; margin-bottom: 8px; }
.article-title { font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; line-height: 1.4; }
.article-excerpt { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; flex: 1; }
.article-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; font-size: 0.78rem; color: var(--color-text-muted); }