/* ============================================
   茄子视频 - 原创样式表
   品牌：茄子视频 | 域名：jxtL6k.cn
   配色：甜蜜粉紫 + 科技蓝绿
   ============================================ */

/* === CSS变量 === */
:root {
  --tx-pink: #FF6B9D;
  --tx-purple: #7C3AED;
  --tx-green: #00D4AA;
  --tx-dark: #1A0B2E;
  --tx-light: #FFF5F8;
  --tx-text: #2D1B4E;
  --tx-gray: #8B7FA3;
  --tx-border: #E8D5F0;
  --tx-gradient: linear-gradient(135deg, #FF6B9D 0%, #7C3AED 100%);
  --tx-gradient-r: linear-gradient(135deg, #7C3AED 0%, #FF6B9D 100%);
  --tx-shadow: 0 4px 24px rgba(124, 58, 237, 0.12);
  --tx-shadow-lg: 0 12px 48px rgba(124, 58, 237, 0.18);
  --tx-radius: 12px;
  --tx-radius-lg: 20px;
  --tx-font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* === 基础重置 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--tx-font);
  color: var(--tx-text);
  background: var(--tx-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--tx-purple); text-decoration: none; transition: all 0.3s ease; }
a:hover { color: var(--tx-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--tx-dark); }

/* === 容器 === */
.tx-wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* === 头部导航 === */
.tx-header {
  background: rgba(26, 11, 46, 0.95);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.tx-header .tx-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.tx-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.tx-logo img {
  height: 42px;
  width: auto;
}
.tx-logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--tx-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tx-logo-text span {
  font-weight: 400;
  font-size: 0.85rem;
  opacity: 0.8;
}
.tx-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.tx-nav a {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.3s;
  white-space: nowrap;
}
.tx-nav a:hover, .tx-nav a.active {
  color: #fff;
  background: rgba(255,107,157,0.2);
}
.tx-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  padding: 8px;
}

/* === 搜索框 === */
.tx-search-bar {
  background: linear-gradient(135deg, #1A0B2E 0%, #2D1654 100%);
  padding: 14px 0;
  border-bottom: 1px solid rgba(124,58,237,0.2);
}
.tx-search-form {
  display: flex;
  max-width: 640px;
  margin: 0 auto;
  background: rgba(255,255,255,0.08);
  border-radius: 50px;
  overflow: hidden;
  border: 1px solid rgba(255,107,157,0.3);
}
.tx-search-form input {
  flex: 1;
  background: none;
  border: none;
  color: #fff;
  padding: 12px 24px;
  font-size: 0.95rem;
  outline: none;
}
.tx-search-form input::placeholder { color: rgba(255,255,255,0.4); }
.tx-search-form button {
  background: var(--tx-gradient);
  border: none;
  color: #fff;
  padding: 12px 28px;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.3s;
}
.tx-search-form button:hover { opacity: 0.85; }

/* === Hero区域 === */
.tx-hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--tx-dark);
}
.tx-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.tx-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}
.tx-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,11,46,0.85) 0%, rgba(124,58,237,0.5) 100%);
  z-index: 2;
}
.tx-hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 60px 20px;
  max-width: 800px;
  margin: 0 auto;
}
.tx-hero h1 {
  font-size: 2.8rem;
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.tx-hero h1 em {
  font-style: normal;
  background: var(--tx-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tx-hero p {
  color: rgba(255,255,255,0.85);
  font-size: 1.15rem;
  margin-bottom: 30px;
  line-height: 1.8;
}
.tx-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 30px;
}
.tx-hero-tags span {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.9);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  border: 1px solid rgba(255,107,157,0.3);
}
.tx-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}
.tx-btn-primary {
  background: var(--tx-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,107,157,0.4);
}
.tx-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,107,157,0.5);
  color: #fff;
}
.tx-btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
}
.tx-btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--tx-pink);
  color: #fff;
}

/* === 通用区块 === */
.tx-section {
  padding: 70px 0;
}
.tx-section-alt {
  background: #fff;
}
.tx-section-dark {
  background: var(--tx-dark);
  color: #fff;
}
.tx-section-dark h2, .tx-section-dark h3, .tx-section-dark h4 { color: #fff; }
.tx-section-header {
  text-align: center;
  margin-bottom: 48px;
}
.tx-section-header h2 {
  font-size: 2rem;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.tx-section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--tx-gradient);
  border-radius: 2px;
  margin: 12px auto 0;
}
.tx-section-header p {
  color: var(--tx-gray);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}
.tx-section-dark .tx-section-header p { color: rgba(255,255,255,0.7); }

/* === 视频卡片网格 === */
.tx-video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.tx-video-card {
  background: #fff;
  border-radius: var(--tx-radius);
  overflow: hidden;
  box-shadow: var(--tx-shadow);
  transition: all 0.35s ease;
  position: relative;
}
.tx-video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--tx-shadow-lg);
}
.tx-video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  cursor: pointer;
}
.tx-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.tx-video-card:hover .tx-video-thumb img {
  transform: scale(1.08);
}
.tx-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px;
  height: 56px;
  background: rgba(255,107,157,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.35s ease;
  box-shadow: 0 4px 20px rgba(255,107,157,0.5);
}
.tx-play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.tx-video-card:hover .tx-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.tx-video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
}
.tx-video-info {
  padding: 14px 16px;
}
.tx-video-info h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.tx-video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--tx-gray);
  font-size: 0.82rem;
}
.tx-video-meta span { display: flex; align-items: center; gap: 4px; }

/* === 服务卡片 === */
.tx-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tx-service-card {
  background: #fff;
  border-radius: var(--tx-radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--tx-shadow);
  transition: all 0.35s;
  border: 1px solid transparent;
}
.tx-service-card:hover {
  border-color: var(--tx-pink);
  transform: translateY(-4px);
  box-shadow: var(--tx-shadow-lg);
}
.tx-service-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--tx-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}
.tx-service-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}
.tx-service-card p {
  color: var(--tx-gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* === 娱乐专区大卡片 === */
.tx-ent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tx-ent-card {
  position: relative;
  border-radius: var(--tx-radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.tx-ent-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.tx-ent-card:hover img { transform: scale(1.1); }
.tx-ent-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,11,46,0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
}
.tx-ent-card-overlay h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 6px;
}
.tx-ent-card-overlay p {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
}

/* === AI赋能 === */
.tx-ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.tx-ai-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,107,157,0.2);
  border-radius: var(--tx-radius);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.35s;
}
.tx-ai-card:hover {
  background: rgba(255,107,157,0.08);
  border-color: var(--tx-pink);
  transform: translateY(-4px);
}
.tx-ai-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}
.tx-ai-card h4 { margin-bottom: 10px; font-size: 1.05rem; }
.tx-ai-card p { color: rgba(255,255,255,0.65); font-size: 0.88rem; }

/* === 社区频道标签 === */
.tx-channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.tx-channel-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: #fff;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: var(--tx-shadow);
  transition: all 0.3s;
  border: 1px solid var(--tx-border);
}
.tx-channel-tag:hover {
  background: var(--tx-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}
.tx-channel-tag:hover a { color: #fff; }

/* === 专家卡片 === */
.tx-expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.tx-expert-card {
  background: #fff;
  border-radius: var(--tx-radius-lg);
  overflow: hidden;
  box-shadow: var(--tx-shadow);
  text-align: center;
  transition: all 0.35s;
}
.tx-expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--tx-shadow-lg);
}
.tx-expert-avatar {
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
}
.tx-expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.tx-expert-card:hover .tx-expert-avatar img { transform: scale(1.05); }
.tx-expert-info {
  padding: 20px;
}
.tx-expert-info h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}
.tx-expert-info .tx-role {
  color: var(--tx-pink);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 8px;
}
.tx-expert-info p {
  color: var(--tx-gray);
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 14px;
}
.tx-expert-btns {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.tx-expert-btns a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
}
.tx-expert-btns .tx-btn-sm-primary {
  background: var(--tx-gradient);
  color: #fff;
}
.tx-expert-btns .tx-btn-sm-outline {
  border: 1px solid var(--tx-border);
  color: var(--tx-purple);
}

/* === 合作品牌墙 === */
.tx-partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
  align-items: center;
}
.tx-partner-item {
  background: #fff;
  border-radius: var(--tx-radius);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  box-shadow: var(--tx-shadow);
  transition: all 0.3s;
  font-weight: 700;
  font-size: 1rem;
  color: var(--tx-gray);
}
.tx-partner-item:hover {
  box-shadow: var(--tx-shadow-lg);
  color: var(--tx-purple);
}

/* === 步骤指南 === */
.tx-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}
.tx-step {
  text-align: center;
  position: relative;
}
.tx-step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--tx-gradient);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.tx-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
.tx-step p { color: var(--tx-gray); font-size: 0.88rem; }

/* === FAQ === */
.tx-faq-list { max-width: 800px; margin: 0 auto; }
.tx-faq-item {
  background: #fff;
  border-radius: var(--tx-radius);
  margin-bottom: 14px;
  box-shadow: var(--tx-shadow);
  overflow: hidden;
}
.tx-faq-q {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s;
}
.tx-faq-q:hover { background: var(--tx-light); }
.tx-faq-q::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--tx-pink);
  font-weight: 300;
  transition: transform 0.3s;
}
.tx-faq-item.active .tx-faq-q::after {
  content: '-';
}
.tx-faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.35s ease;
  color: var(--tx-gray);
  font-size: 0.92rem;
  line-height: 1.7;
}
.tx-faq-item.active .tx-faq-a {
  padding: 0 24px 18px;
  max-height: 300px;
}

/* === 用户评价 === */
.tx-review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.tx-review-card {
  background: #fff;
  border-radius: var(--tx-radius);
  padding: 28px;
  box-shadow: var(--tx-shadow);
}
.tx-review-stars {
  color: #FFB800;
  font-size: 1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.tx-review-card p {
  color: var(--tx-text);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}
.tx-review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.tx-review-author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--tx-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}
.tx-review-author-name {
  font-weight: 600;
  font-size: 0.9rem;
}
.tx-review-author-date {
  color: var(--tx-gray);
  font-size: 0.78rem;
}

/* === 联系区域 === */
.tx-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.tx-contact-info h3 { font-size: 1.3rem; margin-bottom: 20px; }
.tx-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.tx-contact-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--tx-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.tx-contact-item strong { display: block; margin-bottom: 2px; font-size: 0.92rem; }
.tx-contact-item span { color: var(--tx-gray); font-size: 0.88rem; }
.tx-qrcode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.tx-qrcode-item {
  text-align: center;
}
.tx-qrcode-item img {
  width: 160px;
  height: 160px;
  margin: 0 auto 10px;
  border-radius: var(--tx-radius);
}
.tx-qrcode-item p { font-size: 0.88rem; color: var(--tx-gray); }

/* === 社交分享 === */
.tx-share-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.tx-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 500;
  color: #fff;
  transition: all 0.3s;
}
.tx-share-btn:hover { transform: translateY(-2px); color: #fff; opacity: 0.9; }
.tx-share-wechat { background: #07C160; }
.tx-share-weibo { background: #E6162D; }
.tx-share-douyin { background: #161823; }
.tx-share-bilibili { background: #00A1D6; }

/* === 页脚 === */
.tx-footer {
  background: var(--tx-dark);
  color: rgba(255,255,255,0.7);
  padding: 50px 0 0;
}
.tx-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);
}
.tx-footer-brand h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 12px;
}
.tx-footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.tx-footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
}
.tx-footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: color 0.3s;
}
.tx-footer-col a:hover { color: var(--tx-pink); }
.tx-footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.tx-footer-bottom a { color: rgba(255,255,255,0.5); }
.tx-footer-bottom a:hover { color: var(--tx-pink); }

/* === 面包屑 === */
.tx-breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--tx-gray);
}
.tx-breadcrumb a { color: var(--tx-purple); }
.tx-breadcrumb span { margin: 0 8px; }

/* === 内页通用 === */
.tx-page-hero {
  background: var(--tx-dark);
  padding: 60px 0;
  text-align: center;
}
.tx-page-hero h1 {
  color: #fff;
  font-size: 2.2rem;
  margin-bottom: 12px;
}
.tx-page-hero p {
  color: rgba(255,255,255,0.7);
  font-size: 1.05rem;
}
.tx-page-content {
  padding: 50px 0;
}
.tx-page-content h2 { font-size: 1.6rem; margin-bottom: 16px; margin-top: 36px; }
.tx-page-content h3 { font-size: 1.3rem; margin-bottom: 12px; margin-top: 28px; }
.tx-page-content p { margin-bottom: 16px; color: var(--tx-text); line-height: 1.8; }

/* === 视频播放模态框 === */
.tx-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.tx-modal-overlay.active { display: flex; }
.tx-modal-content {
  background: #000;
  border-radius: var(--tx-radius);
  max-width: 800px;
  width: 90%;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  position: relative;
}
.tx-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .tx-video-grid { grid-template-columns: repeat(3, 1fr); }
  .tx-expert-grid { grid-template-columns: repeat(2, 1fr); }
  .tx-ai-grid { grid-template-columns: repeat(2, 1fr); }
  .tx-review-grid { grid-template-columns: repeat(2, 1fr); }
  .tx-footer-grid { grid-template-columns: 1fr 1fr; }
  .tx-partner-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .tx-nav { display: none; }
  .tx-nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--tx-dark);
    padding: 16px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  }
  .tx-menu-btn { display: block; }
  .tx-hero h1 { font-size: 1.8rem; }
  .tx-hero { min-height: 400px; }
  .tx-video-grid { grid-template-columns: repeat(2, 1fr); }
  .tx-service-grid { grid-template-columns: 1fr; }
  .tx-ent-grid { grid-template-columns: 1fr; }
  .tx-ai-grid { grid-template-columns: 1fr; }
  .tx-expert-grid { grid-template-columns: 1fr; }
  .tx-steps { grid-template-columns: repeat(2, 1fr); }
  .tx-review-grid { grid-template-columns: 1fr; }
  .tx-contact-grid { grid-template-columns: 1fr; }
  .tx-partner-grid { grid-template-columns: repeat(2, 1fr); }
  .tx-footer-grid { grid-template-columns: 1fr; }
  .tx-section { padding: 40px 0; }
  .tx-section-header h2 { font-size: 1.5rem; }
}
@media (max-width: 480px) {
  .tx-video-grid { grid-template-columns: 1fr; }
  .tx-steps { grid-template-columns: 1fr; }
}

/* === 懒加载 === */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.5s ease;
}
img[loading="lazy"].loaded, img[loading="lazy"][src] {
  opacity: 1;
}

/* === 动画 === */
.tx-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}
.tx-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}