/* ============================================
   香蕉视频 原创样式表
   配色：深邃暗蓝 + 火焰橙 + 赛博青绿
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --tx-primary: #1B1F3B;
  --tx-accent: #FF6B35;
  --tx-cyber: #00D4AA;
  --tx-bg-dark: #0D1117;
  --tx-bg-card: #161B22;
  --tx-bg-card-hover: #1C2333;
  --tx-text: #E6EDF3;
  --tx-text-muted: #8B949E;
  --tx-border: #30363D;
  --tx-radius: 12px;
  --tx-radius-sm: 8px;
  --tx-shadow: 0 4px 24px rgba(0,0,0,0.3);
  --tx-transition: all 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  background: var(--tx-bg-dark);
  color: var(--tx-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--tx-cyber); text-decoration: none; transition: var(--tx-transition); }
a:hover { color: var(--tx-accent); }

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

/* === 容器 === */
.tx-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* === 顶部导航 === */
.tx-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13,17,23,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tx-border);
}

.tx-header .tx-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.tx-logo img { height: 48px; width: auto; }

.tx-nav { display: flex; gap: 8px; }

.tx-nav-link {
  padding: 8px 16px;
  color: var(--tx-text-muted);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--tx-radius-sm);
  transition: var(--tx-transition);
}

.tx-nav-link:hover, .tx-nav-link.active {
  color: var(--tx-text);
  background: rgba(255,107,53,0.15);
}

.tx-nav-link.active { color: var(--tx-accent); }

.tx-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.tx-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--tx-text);
  border-radius: 2px;
  transition: var(--tx-transition);
}

/* 搜索框 */
.tx-search-bar {
  background: rgba(22,27,34,0.9);
  padding: 10px 0;
  border-bottom: 1px solid var(--tx-border);
}

.tx-search-wrap {
  display: flex;
  max-width: 680px;
  margin: 0 auto;
}

.tx-search-input {
  flex: 1;
  padding: 10px 18px;
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-right: none;
  border-radius: var(--tx-radius-sm) 0 0 var(--tx-radius-sm);
  color: var(--tx-text);
  font-size: 14px;
  outline: none;
  transition: var(--tx-transition);
}

.tx-search-input:focus { border-color: var(--tx-accent); }

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

.tx-search-btn {
  padding: 10px 24px;
  background: var(--tx-accent);
  color: #fff;
  border: none;
  border-radius: 0 var(--tx-radius-sm) var(--tx-radius-sm) 0;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--tx-transition);
}

.tx-search-btn:hover { background: #E85A28; }

/* 移动端菜单 */
.tx-mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(13,17,23,0.98);
  z-index: 999;
  flex-direction: column;
  padding: 16px 20px;
  border-bottom: 1px solid var(--tx-border);
}

.tx-mobile-menu.open { display: flex; }

.tx-mobile-link {
  padding: 12px 16px;
  color: var(--tx-text-muted);
  font-size: 16px;
  border-radius: var(--tx-radius-sm);
}

.tx-mobile-link:hover, .tx-mobile-link.active {
  color: var(--tx-accent);
  background: rgba(255,107,53,0.1);
}

/* === Banner === */
.tx-hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  margin-top: 110px;
  overflow: hidden;
}

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

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

.tx-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,17,23,0.85) 0%, rgba(27,31,59,0.7) 50%, rgba(13,17,23,0.85) 100%);
  z-index: 1;
}

.tx-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}

.tx-hero-content h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--tx-text) 0%, var(--tx-accent) 50%, var(--tx-cyber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.tx-hero-desc {
  font-size: 1.1rem;
  color: var(--tx-text-muted);
  max-width: 800px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.tx-hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

.tx-btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--tx-radius);
  transition: var(--tx-transition);
  cursor: pointer;
  text-align: center;
}

.tx-btn-primary {
  background: var(--tx-accent);
  color: #fff;
  border: 2px solid var(--tx-accent);
}

.tx-btn-primary:hover {
  background: #E85A28;
  border-color: #E85A28;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.3);
}

.tx-btn-outline {
  background: transparent;
  color: var(--tx-cyber);
  border: 2px solid var(--tx-cyber);
}

.tx-btn-outline:hover {
  background: var(--tx-cyber);
  color: var(--tx-bg-dark);
  transform: translateY(-2px);
}

.tx-hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.tx-stat { text-align: center; }

.tx-stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--tx-accent);
}

.tx-stat-label {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
}

/* === 通用区块 === */
.tx-section {
  padding: 80px 0;
}

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

.tx-section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--tx-text);
}

.tx-section-desc {
  text-align: center;
  color: var(--tx-text-muted);
  max-width: 800px;
  margin: 0 auto 48px;
  font-size: 1rem;
  line-height: 1.8;
}

/* === 网格 === */
.tx-grid {
  display: grid;
  gap: 24px;
}

.tx-grid-2 { grid-template-columns: repeat(2, 1fr); }
.tx-grid-3 { grid-template-columns: repeat(3, 1fr); }
.tx-grid-4 { grid-template-columns: repeat(4, 1fr); }
.tx-grid-experts { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }

/* === 卡片 === */
.tx-card {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  padding: 32px 24px;
  transition: var(--tx-transition);
}

.tx-card:hover {
  transform: translateY(-4px);
  border-color: var(--tx-accent);
  box-shadow: 0 8px 32px rgba(255,107,53,0.15);
}

.tx-card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.tx-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--tx-text);
}

.tx-card p {
  color: var(--tx-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.tx-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0,212,170,0.12);
  color: var(--tx-cyber);
  font-size: 0.8rem;
  border-radius: 20px;
  margin-right: 6px;
  margin-bottom: 4px;
}

.tx-tag-sm {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(255,107,53,0.12);
  color: var(--tx-accent);
  font-size: 0.75rem;
  border-radius: 12px;
  margin-right: 4px;
}

/* === 视频卡片 === */
.tx-video-card {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  overflow: hidden;
  transition: var(--tx-transition);
  cursor: pointer;
}

.tx-video-card:hover {
  transform: translateY(-4px);
  border-color: var(--tx-accent);
  box-shadow: var(--tx-shadow);
}

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

.tx-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.tx-video-card:hover .tx-video-thumb img {
  transform: scale(1.05);
}

.tx-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.tx-play-btn span {
  width: 56px;
  height: 56px;
  background: var(--tx-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,107,53,0.4);
  transition: transform 0.3s ease;
}

.tx-video-card:hover .tx-play-btn span { transform: scale(1.1); }

.tx-video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 2px 8px;
  font-size: 0.8rem;
  border-radius: 4px;
}

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

.tx-video-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--tx-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tx-video-meta {
  font-size: 0.8rem;
  color: var(--tx-text-muted);
  margin-bottom: 8px;
}

/* === 特色卡片（娱乐专区） === */
.tx-feature-card {
  position: relative;
  border-radius: var(--tx-radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
}

.tx-feature-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.tx-feature-card:hover img { transform: scale(1.08); }

.tx-feature-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(transparent, rgba(13,17,23,0.95));
}

.tx-feature-overlay h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--tx-text);
}

.tx-feature-overlay p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

/* === AI卡片 === */
.tx-ai-card {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  overflow: hidden;
  transition: var(--tx-transition);
}

.tx-ai-card:hover {
  transform: translateY(-4px);
  border-color: var(--tx-cyber);
  box-shadow: 0 8px 32px rgba(0,212,170,0.15);
}

.tx-ai-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.tx-ai-card h3 {
  padding: 20px 20px 8px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--tx-text);
}

.tx-ai-card p {
  padding: 0 20px;
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  line-height: 1.7;
}

.tx-ai-stats {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tx-ai-stats span {
  font-size: 0.85rem;
  color: var(--tx-text-muted);
}

.tx-ai-stats strong {
  color: var(--tx-cyber);
}

/* === 社区卡片 === */
.tx-community-card {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--tx-transition);
}

.tx-community-card:hover {
  transform: translateY(-4px);
  border-color: var(--tx-accent);
}

.tx-community-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.tx-community-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--tx-text);
}

.tx-community-card p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.tx-member-count {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,107,53,0.12);
  color: var(--tx-accent);
  font-size: 0.85rem;
  border-radius: 20px;
  font-weight: 600;
}

/* === 专家卡片 === */
.tx-expert-card {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  padding: 28px 24px;
  transition: var(--tx-transition);
}

.tx-expert-card:hover {
  border-color: var(--tx-cyber);
  box-shadow: 0 4px 20px rgba(0,212,170,0.1);
}

.tx-expert-avatar {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.tx-expert-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--tx-accent);
  margin-bottom: 10px;
}

.tx-expert-cred {
  font-size: 0.88rem;
  color: var(--tx-cyber);
  margin-bottom: 10px;
  font-style: italic;
}

.tx-expert-card p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  line-height: 1.6;
  margin-bottom: 6px;
}

.tx-expert-social {
  color: var(--tx-cyber) !important;
  font-weight: 500;
  margin-top: 8px !important;
}

.tx-expert-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.tx-btn-sm {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  background: var(--tx-accent);
  color: #fff;
  transition: var(--tx-transition);
}

.tx-btn-sm:hover { background: #E85A28; color: #fff; }

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

.tx-btn-sm-outline:hover {
  background: var(--tx-cyber);
  color: var(--tx-bg-dark);
}

/* === 合作品牌 === */
.tx-brand-wall {
  margin-bottom: 48px;
}

.tx-brand-wall h3 {
  font-size: 1.3rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 24px;
  color: var(--tx-text);
}

.tx-brand-logos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tx-brand-item {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius-sm);
  padding: 20px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--tx-text-muted);
  transition: var(--tx-transition);
}

.tx-brand-item:hover {
  border-color: var(--tx-accent);
  color: var(--tx-text);
}

/* === How-To步骤 === */
.tx-howto {
  margin-bottom: 48px;
}

.tx-howto h3 {
  font-size: 1.3rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 32px;
  color: var(--tx-text);
}

.tx-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tx-step {
  background: var(--tx-bg-card);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
}

.tx-step-num {
  width: 40px;
  height: 40px;
  background: var(--tx-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 auto 14px;
}

.tx-step h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--tx-text);
}

.tx-step p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  line-height: 1.6;
}

/* === FAQ === */
.tx-faq h3 {
  font-size: 1.3rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 24px;
  color: var(--tx-text);
}

.tx-faq-item {
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
}

.tx-faq-q {
  width: 100%;
  padding: 16px 20px;
  background: var(--tx-bg-card);
  border: none;
  color: var(--tx-text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--tx-transition);
}

.tx-faq-q:hover { background: var(--tx-bg-card-hover); }

.tx-faq-arrow {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
  color: var(--tx-accent);
}

.tx-faq-item.open .tx-faq-arrow { transform: rotate(180deg); }

.tx-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.tx-faq-item.open .tx-faq-a { max-height: 300px; }

.tx-faq-a p {
  padding: 16px 20px;
  color: var(--tx-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  background: rgba(22,27,34,0.5);
}

/* === 评论卡片 === */
.tx-review-card {
  background: var(--tx-bg-dark);
  border: 1px solid var(--tx-border);
  border-radius: var(--tx-radius);
  padding: 24px;
  transition: var(--tx-transition);
}

.tx-review-card:hover {
  border-color: var(--tx-accent);
}

.tx-review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.tx-review-name {
  font-weight: 600;
  color: var(--tx-text);
}

.tx-review-stars {
  color: #FFB800;
  font-size: 1.1rem;
}

.tx-review-text {
  font-size: 0.95rem;
  color: var(--tx-text-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.tx-review-date {
  font-size: 0.8rem;
  color: var(--tx-text-muted);
}

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

.tx-contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--tx-accent);
}

.tx-contact-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--tx-border);
  font-size: 0.95rem;
  color: var(--tx-text-muted);
}

.tx-contact-item strong {
  color: var(--tx-text);
}

.tx-contact-qr {
  display: flex;
  gap: 24px;
  justify-content: center;
}

/* === 分享栏 === */
.tx-share-bar {
  background: var(--tx-primary);
  padding: 20px 0;
  border-top: 1px solid var(--tx-border);
  border-bottom: 1px solid var(--tx-border);
}

.tx-share-bar .tx-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.tx-share-label {
  font-size: 0.95rem;
  color: var(--tx-text-muted);
  font-weight: 600;
}

.tx-share-btns {
  display: flex;
  gap: 10px;
}

.tx-share-btn {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  transition: var(--tx-transition);
}

.tx-share-wechat { background: #07C160; }
.tx-share-weibo { background: #E6162D; }
.tx-share-douyin { background: #161823; border: 1px solid #FE2C55; }
.tx-share-bilibili { background: #00A1D6; }

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

/* === 页脚 === */
.tx-footer {
  background: var(--tx-primary);
  padding: 60px 0 0;
  border-top: 2px solid var(--tx-accent);
}

.tx-footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--tx-border);
}

.tx-footer-brand img {
  height: 48px;
  width: auto;
  margin-bottom: 16px;
}

.tx-footer-brand p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  line-height: 1.7;
}

.tx-footer-links h4, .tx-footer-contact h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--tx-text);
  margin-bottom: 16px;
}

.tx-footer-links a {
  display: block;
  padding: 4px 0;
  color: var(--tx-text-muted);
  font-size: 0.9rem;
}

.tx-footer-links a:hover { color: var(--tx-accent); }

.tx-footer-contact p {
  font-size: 0.9rem;
  color: var(--tx-text-muted);
  padding: 3px 0;
}

.tx-footer-bottom {
  padding: 20px 0;
  text-align: center;
}

.tx-footer-bottom p {
  font-size: 0.85rem;
  color: var(--tx-text-muted);
  margin: 4px 0;
}

/* === Toast === */
.tx-toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--tx-accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--tx-radius);
  font-size: 0.95rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.4s ease;
  pointer-events: none;
}

.tx-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* === 内页通用 === */
.tx-page-hero {
  margin-top: 110px;
  padding: 60px 0;
  background: linear-gradient(135deg, var(--tx-primary) 0%, var(--tx-bg-dark) 100%);
  text-align: center;
}

.tx-page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--tx-text);
}

.tx-page-hero p {
  font-size: 1.05rem;
  color: var(--tx-text-muted);
  max-width: 700px;
  margin: 0 auto;
}

.tx-breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--tx-text-muted);
  margin-top: 110px;
}

.tx-breadcrumb a { color: var(--tx-cyber); }
.tx-breadcrumb span { margin: 0 8px; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .tx-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .tx-footer-top { grid-template-columns: 1fr 1fr; }
  .tx-steps { grid-template-columns: repeat(2, 1fr); }
  .tx-brand-logos { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .tx-nav { display: none; }
  .tx-menu-btn { display: flex; }
  
  .tx-hero { min-height: 500px; margin-top: 110px; }
  .tx-hero-content h1 { font-size: 1.8rem; }
  .tx-hero-desc { font-size: 0.95rem; }
  .tx-hero-btns { flex-direction: column; align-items: center; }
  .tx-hero-stats { gap: 24px; }
  .tx-stat-num { font-size: 1.5rem; }
  
  .tx-grid-2, .tx-grid-3, .tx-grid-4 { grid-template-columns: 1fr; }
  .tx-grid-experts { grid-template-columns: 1fr; }
  
  .tx-section { padding: 48px 0; }
  .tx-section-title { font-size: 1.5rem; }
  
  .tx-contact-grid { grid-template-columns: 1fr; }
  .tx-contact-qr { justify-content: center; }
  
  .tx-footer-top { grid-template-columns: 1fr; }
  .tx-steps { grid-template-columns: 1fr; }
  .tx-brand-logos { grid-template-columns: repeat(2, 1fr); }
  
  .tx-share-bar .tx-container { flex-direction: column; }
}

@media (max-width: 480px) {
  .tx-hero-content { padding: 40px 16px; }
  .tx-hero-content h1 { font-size: 1.5rem; }
  .tx-hero-stats { gap: 16px; }
  .tx-stat-num { font-size: 1.3rem; }
}