/* ===================================================
   91 修车改装 - 主样式文件
   域名: 1LL2w3p.cn
   =================================================== */

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

:root {
  --color-primary: #FF6B00;
  --color-primary-dark: #CC5500;
  --color-secondary: #1A1A2E;
  --color-dark: #0D0D1A;
  --color-darker: #080812;
  --color-light: #F5F5F5;
  --color-white: #FFFFFF;
  --color-gray: #888899;
  --color-gray-light: #CCCCDD;
  --color-card-bg: #16213E;
  --color-border: #2A2A4A;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-heading: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(255,107,0,0.25);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: var(--font-main);
  background: var(--color-darker);
  color: var(--color-light);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

/* ===== 顶部公告栏 ===== */
.top-bar {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}

/* ===== 导航栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

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

.site-logo img {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  object-fit: cover;
}

.logo-text {
  font-size: 26px;
  font-weight: 900;
  background: linear-gradient(135deg, #FF6B00, #FFB347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

.logo-sub {
  font-size: 11px;
  color: var(--color-gray);
  display: block;
  letter-spacing: 1px;
  margin-top: -4px;
}

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }

.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-light);
  white-space: nowrap;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-white);
  background: rgba(255,107,0,0.08);
}

.main-nav a:hover::after,
.main-nav a.active::after { width: 60%; }

/* 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(--color-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 搜索框 ===== */
.search-bar-wrapper {
  background: var(--color-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.search-bar-inner {
  display: flex;
  align-items: center;
  max-width: 700px;
  margin: 0 auto;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 30px;
  overflow: hidden;
  transition: var(--transition);
}

.search-bar-inner:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255,107,0,0.15);
}

.search-bar-inner input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 10px 20px;
  color: var(--color-light);
  font-size: 14px;
  font-family: var(--font-main);
}

.search-bar-inner input::placeholder { color: var(--color-gray); }

.search-btn {
  background: var(--color-primary);
  border: none;
  color: #fff;
  padding: 10px 24px;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 600;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-btn:hover { background: var(--color-primary-dark); }

/* ===== Hero Banner ===== */
.hero-banner {
  position: relative;
  height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner.jpg');
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-banner:hover .hero-bg { transform: scale(1); }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,8,18,0.85) 0%, rgba(8,8,18,0.4) 60%, rgba(255,107,0,0.1) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 0 40px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,107,0,0.15);
  border: 1px solid rgba(255,107,0,0.4);
  color: var(--color-primary);
  padding: 6px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
}

.hero-title .brand { color: var(--color-primary); }

.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  line-height: 1.8;
  max-width: 560px;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #FF8C00);
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(255,107,0,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,107,0,0.5);
}

.btn-outline {
  background: transparent;
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.hero-stats {
  position: absolute;
  bottom: 40px;
  right: 40px;
  display: flex;
  gap: 32px;
  z-index: 2;
}

.hero-stat {
  text-align: center;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 16px 24px;
}

.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-primary);
  display: block;
}

.hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

/* ===== 通用区块 ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--color-secondary); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  background: rgba(255,107,0,0.12);
  color: var(--color-primary);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
  border: 1px solid rgba(255,107,0,0.25);
}

.section-title {
  font-size: clamp(24px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
  line-height: 1.25;
}

.section-title .accent { color: var(--color-primary); }

.section-desc {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

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

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,0,0.3);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}

.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); }

.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}

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

.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,107,0,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255,107,0,0.5);
}

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

.play-icon svg {
  width: 24px;
  height: 24px;
  fill: #fff;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.video-info { padding: 16px; }

.video-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-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;
  gap: 12px;
  font-size: 12px;
  color: var(--color-gray);
}

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

.video-stats {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-gray);
}

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

/* ===== 专家卡片 ===== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.expert-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,0,0.3);
}

.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--color-primary);
}

.expert-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 4px;
}

.expert-role {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 12px;
}

.expert-desc {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.expert-tag {
  background: rgba(255,107,0,0.1);
  color: var(--color-primary);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(255,107,0,0.2);
}

.expert-actions { display: flex; gap: 10px; justify-content: center; }

.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-sm-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-sm-primary:hover { background: var(--color-primary-dark); }

.btn-sm-outline {
  background: transparent;
  color: var(--color-gray-light);
  border: 1px solid var(--color-border);
}

.btn-sm-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== 功能模块卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #FF8C00);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,0,0.2);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,107,0,0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 26px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* ===== 合作品牌 ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
}

.partner-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-gray);
  transition: var(--transition);
  cursor: pointer;
}

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

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.review-stars {
  color: #FFB347;
  font-size: 18px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 14px;
  color: var(--color-gray-light);
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #FF8C00);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
}

.review-date {
  font-size: 12px;
  color: var(--color-gray);
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: rgba(255,107,0,0.3); }

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 22px;
  color: var(--color-primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.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 ease;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== 联系区块 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: rgba(255,107,0,0.3);
  transform: translateY(-4px);
}

.contact-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.contact-label {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 6px;
}

.contact-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-white);
}

/* ===== 分享按钮 ===== */
.share-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 40px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #000; color: #fff; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; color: #fff; }

.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }

/* ===== 底部 ===== */
.site-footer {
  background: var(--color-darker);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 30px;
}

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

.footer-brand .logo-text { font-size: 28px; margin-bottom: 12px; display: block; }

.footer-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-qr-row {
  display: flex;
  gap: 20px;
}

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

.footer-qr-item img {
  width: 90px;
  height: 90px;
  border-radius: 8px;
  border: 2px solid var(--color-border);
  object-fit: cover;
}

.footer-qr-item span {
  display: block;
  font-size: 11px;
  color: var(--color-gray);
  margin-top: 6px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

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

.footer-links a {
  font-size: 13px;
  color: var(--color-gray);
  transition: var(--transition);
}

.footer-links a:hover { color: var(--color-primary); padding-left: 4px; }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-gray);
}

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

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--color-gray);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--color-gray); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-primary); }

/* ===== 内页 Hero ===== */
.page-hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-darker) 100%);
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,107,0,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  color: var(--color-white);
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 600px;
  line-height: 1.8;
}

/* ===== 图片区块 ===== */
.img-section {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.img-section img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
}

/* ===== 数据统计条 ===== */
.stats-bar {
  background: linear-gradient(135deg, var(--color-primary), #FF8C00);
  padding: 40px 0;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item .num {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  display: block;
}

.stat-item .label {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
}

/* ===== 加入社区 ===== */
.join-section {
  background: linear-gradient(135deg, var(--color-card-bg), var(--color-secondary));
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.join-section::before {
  content: '91';
  position: absolute;
  font-size: 200px;
  font-weight: 900;
  color: rgba(255,107,0,0.04);
  right: -20px;
  bottom: -40px;
  line-height: 1;
  pointer-events: none;
}

.join-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}

.join-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 滚动动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 16px; }
}

@media (max-width: 768px) {
  .hero-banner { height: 500px; }
  .hero-content { padding: 0 20px; }
  .hero-stats { display: none; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--color-darker); border-bottom: 1px solid var(--color-border); padding: 16px; gap: 4px; }
  .main-nav.open { display: flex; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .join-section { padding: 40px 20px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .footer-qr-row { justify-content: center; }
}

/* ===== 视频模态框 ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.video-modal.active { display: flex; }

.modal-inner {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 900px;
  width: 100%;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(0,0,0,0.6);
  border: none;
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover { background: var(--color-primary); }

.modal-video {
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray);
  font-size: 16px;
}

.modal-info { padding: 24px; }

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* ===== 娱乐专区 TikTok风格 ===== */
.tiktok-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.tiktok-card {
  cursor: pointer;
  transition: var(--transition);
}

.tiktok-card:hover { transform: translateY(-6px); }

.tiktok-thumb {
  position: relative;
  aspect-ratio: 9/16;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #111;
}

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

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

.tiktok-likes {
  position: absolute;
  bottom: 36px;
  right: 8px;
  font-size: 12px;
  color: #fff;
  background: rgba(0,0,0,0.5);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.tiktok-title {
  font-size: 12px;
  color: var(--color-gray-light);
  margin-top: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 社区卡片 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.community-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.community-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #FF8C00);
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: left;
}

.community-card:hover::after { transform: scaleX(1); }

.community-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,0,0.2);
}

.community-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.community-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 10px;
}

.community-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.community-link {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 600;
  transition: var(--transition);
}

.community-link:hover { letter-spacing: 0.5px; }

/* ===== 专家社交账号 ===== */
.expert-social {
  font-size: 11px;
  color: var(--color-gray);
  margin-bottom: 12px;
  line-height: 1.6;
}

/* ===== 模态框占位符 ===== */
.modal-player-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--color-gray);
  font-size: 15px;
  height: 100%;
  width: 100%;
}

/* ===== 内页视频卡片 video-desc ===== */
.video-desc {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.6;
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 响应式补充 ===== */
@media (max-width: 768px) {
  .tiktok-grid { grid-template-columns: repeat(3, 1fr); }
  .community-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .tiktok-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}