/* ========================================
   糖心vlog - 主样式文件
   Brand: 糖心vlog | cga6ua.cn
   ======================================== */

/* CSS变量 - 原创配色方案 */
:root {
  --primary: #e8436a;
  --primary-dark: #c02d52;
  --primary-light: #ff6b8a;
  --secondary: #7c3aed;
  --secondary-light: #a78bfa;
  --accent: #f59e0b;
  --accent-pink: #fce4ec;
  --bg-dark: #0f0a1a;
  --bg-card: #1a1228;
  --bg-section: #120d1f;
  --text-white: #ffffff;
  --text-light: #e2d9f3;
  --text-muted: #9d8fb5;
  --border-color: rgba(232,67,106,0.2);
  --gradient-main: linear-gradient(135deg, #e8436a 0%, #7c3aed 100%);
  --gradient-card: linear-gradient(145deg, #1a1228 0%, #0f0a1a 100%);
  --gradient-hero: linear-gradient(135deg, #0f0a1a 0%, #1a0d2e 50%, #0f0a1a 100%);
  --shadow-card: 0 8px 32px rgba(232,67,106,0.15);
  --shadow-hover: 0 16px 48px rgba(232,67,106,0.3);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ========================================
   通用工具类
   ======================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,67,106,0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  padding: 11px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.tag {
  display: inline-block;
  background: rgba(232,67,106,0.15);
  color: var(--primary-light);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid rgba(232,67,106,0.3);
}

/* ========================================
   顶部公告栏
   ======================================== */
.top-bar {
  background: var(--gradient-main);
  padding: 8px 0;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.top-bar a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 10, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 20px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.navbar-brand img.site-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}

.navbar-brand img.site-favicon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-light);
  background: rgba(232,67,106,0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-btn-live {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--gradient-main);
  color: #fff;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.nav-btn-live:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(232,67,106,0.4);
}

.live-dot {
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========================================
   搜索框
   ======================================== */
.search-bar-section {
  background: var(--bg-section);
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.search-bar-wrapper {
  display: flex;
  align-items: center;
  max-width: 680px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  overflow: hidden;
  transition: var(--transition);
}

.search-bar-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,67,106,0.15);
}

.search-bar-wrapper input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-white);
  font-size: 0.95rem;
  padding: 12px 20px;
}

.search-bar-wrapper input::placeholder {
  color: var(--text-muted);
}

.search-bar-wrapper button {
  background: var(--gradient-main);
  border: none;
  color: #fff;
  padding: 12px 24px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-bar-wrapper button:hover {
  opacity: 0.9;
}

.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.search-hot-tags span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.search-hot-tags a {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: var(--transition);
}

.search-hot-tags a:hover {
  color: var(--primary-light);
  border-color: var(--primary);
}

/* ========================================
   Hero 横幅
   ======================================== */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,10,26,0.9) 0%, rgba(124,58,237,0.3) 50%, rgba(15,10,26,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,67,106,0.15);
  border: 1px solid rgba(232,67,106,0.4);
  color: var(--primary-light);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}

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

.hero-stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.hero-stat-item .label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1228;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.08);
}

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: var(--transition);
}

.video-card:hover .video-play-btn {
  opacity: 1;
}

.play-circle {
  width: 60px;
  height: 60px;
  background: rgba(232,67,106,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
  backdrop-filter: blur(4px);
}

.video-card:hover .play-circle {
  transform: scale(1);
}

.play-circle svg {
  width: 24px;
  height: 24px;
  fill: #fff;
  margin-left: 3px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}

.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.video-info {
  padding: 14px 16px;
}

.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-white);
  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: 0.78rem;
  color: var(--text-muted);
}

.video-author {
  display: flex;
  align-items: center;
  gap: 6px;
}

.author-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.video-stats {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.video-stats span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ========================================
   分区模块
   ======================================== */
.section {
  padding: 72px 0;
}

.section-dark {
  background: var(--bg-section);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}

.section-header-left h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.section-header-left h2 .brand {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header-left p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.view-all {
  color: var(--primary-light);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.view-all:hover {
  color: var(--primary);
}

/* ========================================
   专家展示
   ======================================== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--primary);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
  border: 3px solid rgba(232,67,106,0.3);
}

.expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.expert-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.expert-title {
  font-size: 0.82rem;
  color: var(--primary-light);
  margin-bottom: 12px;
}

.expert-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.expert-awards {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.expert-actions a {
  font-size: 0.78rem;
  padding: 6px 14px;
  border-radius: 50px;
  font-weight: 600;
}

/* ========================================
   功能特色模块
   ======================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(232,67,106,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.6rem;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--gradient-main);
}

.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========================================
   合作品牌Logo墙
   ======================================== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}

.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}

.partner-item:hover {
  color: var(--text-white);
  border-color: var(--primary);
  background: rgba(232,67,106,0.08);
}

/* ========================================
   加入社区指南
   ======================================== */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.join-step {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  border: 1px solid var(--border-color);
  position: relative;
  transition: var(--transition);
}

.join-step:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.step-num {
  position: absolute;
  top: -14px;
  left: 20px;
  width: 28px;
  height: 28px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
}

.join-step h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  margin-top: 8px;
}

.join-step p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========================================
   FAQ 常见问题
   ======================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-question {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  gap: 12px;
  user-select: none;
}

.faq-question:hover {
  color: var(--primary-light);
}

.faq-icon {
  width: 24px;
  height: 24px;
  background: rgba(232,67,106,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
  transition: var(--transition);
  color: var(--primary-light);
}

.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 20px 18px;
}

/* ========================================
   用户评价
   ======================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.reviewer-info h4 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.reviewer-info span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.review-stars {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.review-text {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

.review-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--primary-light);
  background: rgba(232,67,106,0.1);
  padding: 3px 10px;
  border-radius: 50px;
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(232,67,106,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  border: 1px solid rgba(232,67,106,0.2);
}

.contact-item-text h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-item-text p, .contact-item-text a {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.contact-item-text a:hover {
  color: var(--primary-light);
}

.qr-codes {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

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

.qr-item img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
  margin-bottom: 8px;
}

.qr-item p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ========================================
   社交分享
   ======================================== */
.share-section {
  background: var(--bg-section);
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.share-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-light);
}

.share-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  color: #fff;
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #000000; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; }
.share-qq { background: #1D6FA4; }

/* ========================================
   页脚
   ======================================== */
.footer {
  background: #080512;
  padding: 60px 0 0;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.footer-brand .brand-name {
  font-size: 1.2rem;
  margin-bottom: 12px;
  display: block;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-white);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--primary-light);
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary-light);
}

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: var(--transition);
}

.breadcrumb a:hover {
  color: var(--primary-light);
}

.breadcrumb .separator {
  color: var(--border-color);
}

.breadcrumb .current {
  color: var(--text-light);
}

/* ========================================
   分类标签栏
   ======================================== */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.cat-tab {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  transition: var(--transition);
}

.cat-tab:hover,
.cat-tab.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
}

/* ========================================
   直播卡片
   ======================================== */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #e8436a;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  position: absolute;
  top: 8px;
  right: 8px;
}

.live-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: pulse-dot 1.2s infinite;
}

/* ========================================
   AI功能展示
   ======================================== */
.ai-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid rgba(124,58,237,0.2);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.ai-card:hover {
  border-color: var(--secondary);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(124,58,237,0.2);
}

.ai-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: block;
}

.ai-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--secondary-light);
}

.ai-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========================================
   统计数字展示
   ======================================== */
.stats-section {
  background: var(--gradient-main);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .num {
  font-size: 2.4rem;
  font-weight: 900;
  color: #fff;
  display: block;
  margin-bottom: 8px;
}

.stat-item .label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}

/* ========================================
   内页 Banner
   ======================================== */
.page-banner {
  background: var(--gradient-hero);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,67,106,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.page-banner h1 .brand {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-banner p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ========================================
   加载动画
   ======================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .ai-features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(15, 10, 26, 0.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    gap: 4px;
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .nav-links a {
    padding: 12px 16px;
    width: 100%;
  }
  
  .hamburger {
    display: flex;
  }
  
  .nav-btn-live {
    display: none;
  }
  
  .navbar-inner {
    position: relative;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  
  .ai-features {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .section {
    padding: 48px 0;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .join-steps {
    grid-template-columns: 1fr;
  }
  
  .experts-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    gap: 16px;
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .share-buttons {
    gap: 8px;
  }
  
  .share-btn {
    padding: 8px 14px;
    font-size: 0.82rem;
  }
}

/* ========================================
   滚动条样式
   ======================================== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ========================================
   选中文字样式
   ======================================== */
::selection {
  background: rgba(232,67,106,0.3);
  color: #fff;
}