/* ===================================================
   糖心vlog - 主样式文件 style.css
   Brand: 糖心vlog | Domain: shdfckj.cn
   =================================================== */

/* === 重置 & 基础 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #1a1a2e;
  background: #f8fafc;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color 0.25s; }
a:hover { color: #ff6b35; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }

/* === 容器 === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* === 顶部公告栏 === */
.top-bar {
  background: #1a3a5c;
  color: rgba(255,255,255,0.85);
  font-size: 12px;
  padding: 7px 0;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.top-bar strong { color: #ff6b35; }
.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: #ff6b35; }

/* === 主导航 === */
.site-header {
  background: #fff;
  box-shadow: 0 2px 12px rgba(26,58,92,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.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: 900;
  color: #1a3a5c;
  line-height: 1.1;
  letter-spacing: -0.5px;
}
.logo-sub {
  font-size: 10px;
  color: #ff6b35;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #374151;
  transition: all 0.25s;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  background: #f0f4f8;
  color: #1a3a5c;
}
.main-nav .nav-btn {
  background: #ff6b35;
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 20px;
}
.main-nav .nav-btn:hover {
  background: #e55a2b;
  color: #fff !important;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #1a3a5c;
  border-radius: 2px;
  transition: all 0.3s;
}

/* === 搜索栏 === */
.search-bar-wrap {
  background: #f0f4f8;
  padding: 10px 0;
  border-bottom: 1px solid #e5e7eb;
}
.search-bar {
  display: flex;
  max-width: 600px;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(26,58,92,0.1);
}
.search-bar input {
  flex: 1;
  padding: 10px 20px;
  border: none;
  font-size: 14px;
  outline: none;
  background: #fff;
}
.search-bar button {
  padding: 10px 24px;
  background: #1a3a5c;
  color: #fff;
  border: none;
  font-size: 14px;
  font-weight: 700;
  transition: background 0.25s;
}
.search-bar button:hover { background: #ff6b35; }

/* === 通知滚动栏 === */
.notice-bar {
  background: linear-gradient(90deg, #1a3a5c, #2d5a8e);
  color: rgba(255,255,255,0.9);
  padding: 8px 0;
  overflow: hidden;
}
.notice-inner {
  display: flex;
  align-items: center;
  gap: 16px;
}
.notice-label {
  background: #ff6b35;
  color: #fff;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}
.notice-scroll { overflow: hidden; flex: 1; }
.notice-text {
  display: inline-block;
  white-space: nowrap;
  font-size: 13px;
  animation: scrollNotice 30s linear infinite;
}
@keyframes scrollNotice {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

/* === Hero 首屏 === */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0d1b2a 0%, #1a3a5c 50%, #2d5a8e 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/banner-hero.jpg') center/cover no-repeat;
  opacity: 0.25;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,27,42,0.85) 0%, rgba(26,58,92,0.7) 100%);
}
.hero-section .container { position: relative; z-index: 2; padding: 80px 20px; }
.hero-content { max-width: 680px; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,107,53,0.2);
  border: 1px solid rgba(255,107,53,0.4);
  color: #ff8c5a;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-title em {
  color: #ff6b35;
  font-style: normal;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #ff6b35, #ff8c5a);
  color: #fff;
  border: none;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(255,107,53,0.35);
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.45);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.3s;
  cursor: pointer;
}
.btn-outline:hover {
  border-color: #ff6b35;
  color: #ff6b35;
  background: rgba(255,107,53,0.1);
}
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 28px;
  font-weight: 900;
  color: #ff6b35;
  line-height: 1.1;
}
.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

/* === 通用Section === */
.section { padding: 72px 0; }
.section-alt { background: #f0f4f8; }
.section-dark {
  background: linear-gradient(135deg, #0d1b2a, #1a3a5c);
  color: #fff;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.3);
  color: #ff6b35;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: #1a3a5c;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-dark .section-title { color: #fff; }
.section-desc {
  font-size: 15px;
  color: #6b7280;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}
.section-dark .section-desc { color: rgba(255,255,255,0.65); }

/* === 视频标签 === */
.video-section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1a3a5c;
  color: #fff;
  padding: 6px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 24px;
}
.video-section-label::before {
  content: '▶';
  color: #ff6b35;
  font-size: 10px;
}

/* === 视频网格 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

/* === 视频卡片 === */
.video-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(26,58,92,0.08);
  transition: all 0.3s;
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(26,58,92,0.15);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0d1b2a;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.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 0.3s;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,107,53,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 4px 16px rgba(255,107,53,0.5);
  transition: transform 0.2s;
}
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 18px solid #fff;
  margin-left: 4px;
}
.video-card:hover .play-icon { transform: scale(1.1); }
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(255,107,53,0.9);
  color: #fff;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
}
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 14px;
  font-weight: 700;
  color: #1a1a2e;
  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: #9ca3af;
}
.video-meta .views::before { content: '▶ '; }
.video-meta .likes::before { content: '♥ '; color: #ff6b35; }
.video-meta .comments::before { content: '💬 '; }

/* === 直播网格 === */
.live-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.live-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transition: transform 0.3s;
}
.live-card:hover { transform: scale(1.02); }
.live-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.live-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 50%);
}
.live-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: #e74c3c;
  color: #fff;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
.live-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
}
.live-name {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.live-viewers {
  font-size: 12px;
  color: rgba(255,255,255,0.8);
}

/* === 功能网格 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.feature-item {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 28px 24px;
  transition: all 0.3s;
}
.feature-item:hover {
  border-color: #ff6b35;
  box-shadow: 0 8px 24px rgba(255,107,53,0.12);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 36px;
  display: block;
  margin-bottom: 16px;
}
.feature-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.7;
}

/* === 卡片网格 === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(26,58,92,0.08);
  transition: all 0.3s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(26,58,92,0.15);
}
.card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.card:hover .card-img img { transform: scale(1.05); }
.card-body { padding: 20px; }
.card-tag {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  color: #ff6b35;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 10px;
}
.card-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 8px;
  line-height: 1.4;
}
.card-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.7;
}

/* === 专家网格 === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s;
}
.expert-card:hover {
  border-color: #1a3a5c;
  box-shadow: 0 8px 24px rgba(26,58,92,0.12);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 3px solid #f0f4f8;
}
.expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.expert-name {
  font-size: 18px;
  font-weight: 800;
  color: #1a3a5c;
  margin-bottom: 4px;
}
.expert-role {
  font-size: 12px;
  color: #ff6b35;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.expert-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.7;
  margin-bottom: 16px;
}
.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.btn-sm {
  padding: 7px 16px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid #1a3a5c;
  color: #1a3a5c;
  background: transparent;
  transition: all 0.25s;
  cursor: pointer;
}
.btn-sm:hover { background: #1a3a5c; color: #fff; }
.btn-sm.filled { background: #1a3a5c; color: #fff; }
.btn-sm.filled:hover { background: #ff6b35; border-color: #ff6b35; }

/* === 合作品牌 === */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.partner-logo {
  padding: 14px 28px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  color: #6b7280;
  transition: all 0.3s;
}
.partner-logo:hover {
  border-color: #1a3a5c;
  color: #1a3a5c;
  box-shadow: 0 4px 12px rgba(26,58,92,0.1);
}

/* === 步骤 === */
.how-to-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step-item {
  background: #fff;
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  border: 1px solid #e5e7eb;
  position: relative;
  transition: all 0.3s;
}
.step-item:hover {
  border-color: #ff6b35;
  box-shadow: 0 8px 24px rgba(255,107,53,0.12);
}
.step-icon {
  font-size: 40px;
  display: block;
  margin-bottom: 16px;
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 10px;
}
.step-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.7;
}

/* === 联系网格 === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.contact-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}
.contact-card:hover {
  border-color: #1a3a5c;
  box-shadow: 0 8px 24px rgba(26,58,92,0.1);
}
.contact-icon { font-size: 32px; margin-bottom: 12px; }
.contact-title {
  font-size: 15px;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 10px;
}
.contact-info {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.8;
}
.contact-info a { color: #ff6b35; font-weight: 600; }

/* === 二维码 === */
.qrcode-wrap {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}
.qrcode-item { text-align: center; }
.qrcode-item img {
  border-radius: 12px;
  border: 3px solid #f0f4f8;
  margin-bottom: 8px;
}
.qrcode-label {
  font-size: 12px;
  color: #6b7280;
  line-height: 1.5;
}

/* === 评价 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s;
}
.review-card:hover {
  box-shadow: 0 8px 24px rgba(26,58,92,0.1);
  border-color: #1a3a5c;
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a3a5c, #2d5a8e);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}
.review-user { flex: 1; }
.review-name { font-size: 14px; font-weight: 700; color: #1a3a5c; }
.review-date { font-size: 11px; color: #9ca3af; }
.review-stars { color: #f59e0b; font-size: 14px; }
.review-text { font-size: 13px; color: #6b7280; line-height: 1.8; }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  background: #fff;
}
.faq-question {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 700;
  color: #1a3a5c;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.25s;
}
.faq-question::after {
  content: '+';
  font-size: 20px;
  color: #ff6b35;
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-question { background: #f0f4f8; }
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer span {
  display: block;
  padding: 0 20px 18px;
  font-size: 14px;
  color: #6b7280;
  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: #6b7280; }
.share-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #000; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: scale(1.05); }

/* === 标签云 === */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 14px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 16px;
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  transition: all 0.25s;
}
.tag:hover {
  background: #ff6b35;
  border-color: #ff6b35;
  color: #fff;
}

/* === 分页 === */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 32px;
}
.page-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  border: 1px solid #e5e7eb;
  color: #1a3a5c;
  background: #fff;
  transition: all 0.25s;
}
.page-btn:hover, .page-btn.active {
  background: #1a3a5c;
  color: #fff;
  border-color: #1a3a5c;
}

/* === 面包屑 === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #9ca3af;
  padding: 12px 0;
}
.breadcrumb a { color: #6b7280; }
.breadcrumb a:hover { color: #ff6b35; }
.breadcrumb strong { color: #1a3a5c; }
.breadcrumb span { color: #d1d5db; }

/* === 页面头部 === */
.page-hero {
  background: linear-gradient(135deg, #1a3a5c, #2d5a8e);
  padding: 60px 20px;
  text-align: center;
}
.page-hero-content h1 {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
}
.page-hero-content p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto;
}

/* === 侧边栏布局 === */
.content-sidebar {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: start;
}
.sidebar-widget {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-widget h3 {
  font-size: 15px;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f0f4f8;
}
.footer-links { display: flex; flex-direction: column; gap: 6px; }
.footer-links a {
  font-size: 13px;
  color: #6b7280;
  padding: 4px 0;
  border-bottom: 1px solid #f0f4f8;
  transition: color 0.25s;
}
.footer-links a:hover { color: #ff6b35; }

/* === 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;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  padding: 20px;
}
.video-modal.active {
  opacity: 1;
  pointer-events: all;
}
.modal-inner {
  background: #0d1b2a;
  border-radius: 16px;
  overflow: hidden;
  max-width: 800px;
  width: 100%;
  position: relative;
  transform: scale(0.9);
  transition: transform 0.3s;
}
.video-modal.active .modal-inner { transform: scale(1); }
.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  cursor: pointer;
  transition: background 0.25s;
}
.modal-close:hover { background: #ff6b35; }
.modal-video { width: 100%; }

/* === 底部 === */
.site-footer {
  background: linear-gradient(135deg, #0d1b2a, #1a3a5c);
  color: rgba(255,255,255,0.8);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .site-logo { margin-bottom: 16px; }
.footer-brand .logo-name { color: #fff; }
.footer-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-social { display: flex; gap: 10px; }
.social-link {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
  transition: all 0.25s;
}
.social-link:hover { background: #ff6b35; color: #fff; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col .footer-links a {
  color: rgba(255,255,255,0.55);
  border-bottom-color: rgba(255,255,255,0.05);
}
.footer-col .footer-links a:hover { color: #ff6b35; }
.footer-bottom {
  background: rgba(0,0,0,0.3);
  padding: 16px 20px;
  font-size: 12px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: #ff6b35; }

/* === 返回顶部 === */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: #1a3a5c;
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(26,58,92,0.3);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 999;
  cursor: pointer;
}
.back-to-top.visible { opacity: 1; pointer-events: all; }
.back-to-top:hover { background: #ff6b35; transform: translateY(-2px); }

/* === 工具类 === */
.text-center { text-align: center; }
.mt-8 { margin-top: 32px; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-sidebar { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    z-index: 999;
    gap: 4px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { width: 100%; text-align: center; padding: 12px; }
  .hamburger { display: flex; }
  .hero-section { min-height: 480px; }
  .hero-stats { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .live-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 48px 0; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .how-to-steps { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .top-bar .container { flex-direction: column; }
  .top-bar-links { display: none; }
  .video-grid { grid-template-columns: 1fr; }
  .live-grid { grid-template-columns: 1fr; }
  .back-to-top { bottom: 16px; right: 16px; }
}

/* === 打印样式 === */
@media print {
  .site-header, .search-bar-wrap, .notice-bar, .back-to-top, .video-modal { display: none; }
}