/* ===== Zhiku (Knowledge Base) Page Styles ===== */

/* Base container width - 统一最大宽度1450px */
.tengzhi-section-pad {
  max-width: 1450px;
  margin: 0 auto;
  padding: 80px 60px;
}

/* Hero Banner */
.tengzhi-zhiku-hero {
  background: linear-gradient(135deg, #78C950 0%, #5ab840 100%);
  padding: 100px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tengzhi-zhiku-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.tengzhi-hero-content {
  max-width: 1450px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  width: 100%;
}

.tengzhi-hero-title {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.tengzhi-hero-subtitle {
  font-size: 20px;
  color: rgba(255,255,255,0.95);
  margin-bottom: 50px;
  line-height: 1.6;
}

.tengzhi-hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

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

.tengzhi-stat-number {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.tengzhi-stat-label {
  font-size: 16px;
  color: rgba(255,255,255,0.95);
  font-weight: 500;
}

/* Section Header */
.tengzhi-section-header {
  text-align: center;
  margin-bottom: 60px;
}

.tengzhi-section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(120,201,80,0.1);
  color: var(--primary-color);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.tengzhi-section-title {
  font-size: 36px;
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: 16px;
}

.tengzhi-section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.6;
  max-width: 1450px;
  margin: 0 auto;
}

/* News Tabs */
.tengzhi-news-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tengzhi-tab-btn {
  padding: 12px 28px;
  border: 2px solid rgba(0,0,0,0.1);
  background: #fff;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: all 0.3s;
}

.tengzhi-tab-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.tengzhi-tab-btn.tengzhi-active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: #fff;
}

/* News Grid */
.tengzhi-news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto 40px;
}

.tengzhi-news-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: all 0.3s;
  border: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-news-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.tengzhi-news-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.tengzhi-news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.tengzhi-news-card:hover .tengzhi-news-image img {
  transform: scale(1.1);
}

.tengzhi-news-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: var(--primary-color);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
}

.tengzhi-news-content {
  padding: 24px;
}

.tengzhi-news-title {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 12px;
  line-height: 1.4;
}

.tengzhi-news-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.tengzhi-news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-light);
}

.tengzhi-news-views {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tengzhi-news-views i {
  width: 16px;
  height: 16px;
}

.tengzhi-load-more {
  text-align: center;
}

/* Video Platforms */
.tengzhi-video-platforms {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 1450px;
  margin: 0 auto 60px;
}

.tengzhi-platform-card {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.tengzhi-platform-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.tengzhi-platform-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), #5ab840);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
}

.tengzhi-platform-icon svg {
  width: 40px;
  height: 40px;
}

.tengzhi-platform-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 12px;
}

.tengzhi-platform-desc {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.tengzhi-platform-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-dark);
}

.tengzhi-platform-stats strong {
  color: var(--primary-color);
  font-size: 18px;
}

/* Video Categories */
.tengzhi-video-categories {
  max-width: 1450px;
  margin: 0 auto 40px;
}

.tengzhi-category-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 20px;
}

.tengzhi-video-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.tengzhi-video-tag {
  padding: 10px 20px;
  background: #fff;
  border: 2px solid rgba(0,0,0,0.1);
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: all 0.3s;
}

.tengzhi-video-tag:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.tengzhi-video-tag.tengzhi-active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: #fff;
}

/* Video Grid */
.tengzhi-video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto;
}

.tengzhi-video-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: all 0.3s;
  border: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.tengzhi-video-thumbnail {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.tengzhi-video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.tengzhi-video-card:hover .tengzhi-video-thumbnail img {
  transform: scale(1.1);
}

.tengzhi-video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  opacity: 0;
  transition: opacity 0.3s;
}

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

.tengzhi-video-play svg {
  width: 32px;
  height: 32px;
}

.tengzhi-video-duration {
  position: absolute;
  bottom: 12px;
  right: 12px;
  padding: 4px 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
}

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

.tengzhi-video-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
  line-height: 1.4;
}

.tengzhi-video-meta {
  font-size: 13px;
  color: var(--text-light);
}

/* Knowledge Categories */
.tengzhi-knowledge-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto 40px;
}

.tengzhi-knowledge-category {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.tengzhi-category-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), #5ab840);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.tengzhi-category-icon svg {
  width: 28px;
  height: 28px;
}

.tengzhi-category-info {
  flex: 1;
}

.tengzhi-category-name {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.tengzhi-category-count {
  font-size: 14px;
  color: var(--text-light);
}

.tengzhi-article-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tengzhi-article-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-article-list li:last-child {
  border-bottom: none;
}

.tengzhi-article-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dark);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.3s;
}

.tengzhi-article-link:hover {
  color: var(--primary-color);
}

.tengzhi-article-link svg {
  width: 18px;
  height: 18px;
  color: var(--primary-color);
}

.tengzhi-access-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.tengzhi-access-badge.tengzhi-free {
  background: rgba(120,201,80,0.1);
  color: var(--primary-color);
}

.tengzhi-access-badge.tengzhi-member {
  background: rgba(255,216,90,0.1);
  color: #d4a017;
}

.tengzhi-access-badge.tengzhi-vip {
  background: rgba(239,68,68,0.1);
  color: #dc2626;
}

/* Membership Prompt */
.tengzhi-membership-prompt {
  max-width: 1450px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(120,201,80,0.05), rgba(90,184,64,0.05));
  border-radius: 16px;
  padding: 32px;
  border: 2px solid rgba(120,201,80,0.2);
}

.tengzhi-prompt-content {
  display: flex;
  align-items: center;
  gap: 20px;
}

.tengzhi-prompt-content svg {
  width: 48px;
  height: 48px;
  color: var(--primary-color);
  flex-shrink: 0;
}

.tengzhi-prompt-text {
  flex: 1;
}

.tengzhi-prompt-text h4 {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.tengzhi-prompt-text p {
  font-size: 15px;
  color: var(--text-light);
}

/* Question Stats */
.tengzhi-question-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto 60px;
}

.tengzhi-stat-box {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), #5ab840);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.tengzhi-stat-icon svg {
  width: 28px;
  height: 28px;
}

.tengzhi-stat-info {
  flex: 1;
}

.tengzhi-stat-value {
  font-size: 28px;
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.tengzhi-stat-label {
  font-size: 14px;
  color: var(--text-light);
}

/* Question Categories */
.tengzhi-question-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto 60px;
}

.tengzhi-qcategory-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.tengzhi-qcategory-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.tengzhi-qcategory-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), #5ab840);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: #fff;
}

.tengzhi-qcategory-icon svg {
  width: 32px;
  height: 32px;
}

.tengzhi-qcategory-title {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.tengzhi-qcategory-count {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.tengzhi-progress-bar {
  height: 8px;
  background: rgba(0,0,0,0.05);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.tengzhi-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #5ab840);
  border-radius: 4px;
  transition: width 0.3s;
}

.tengzhi-progress-text {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}

/* Practice Modes */
.tengzhi-practice-modes {
  max-width: 1450px;
  margin: 0 auto;
}

.tengzhi-mode-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 24px;
}

.tengzhi-mode-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tengzhi-mode-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.tengzhi-mode-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.tengzhi-mode-card svg {
  width: 48px;
  height: 48px;
  color: var(--primary-color);
  margin-bottom: 16px;
}

.tengzhi-mode-card h4 {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 12px;
}

.tengzhi-mode-card p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* Exam Types */
.tengzhi-exam-types {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1450px;
  margin: 0 auto 60px;
}

.tengzhi-exam-type-card {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  transition: all 0.3s;
}

.tengzhi-exam-type-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.tengzhi-exam-type-card.tengzhi-exam-featured {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, rgba(120,201,80,0.05), rgba(90,184,64,0.05));
}

.tengzhi-exam-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 6px 14px;
  background: var(--accent-color);
  color: #333;
  font-size: 13px;
  font-weight: 700;
  border-radius: 20px;
}

.tengzhi-exam-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), #5ab840);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
}

.tengzhi-exam-icon svg {
  width: 32px;
  height: 32px;
}

.tengzhi-exam-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 12px;
  text-align: center;
}

.tengzhi-exam-desc {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 24px;
  text-align: center;
  line-height: 1.6;
}

.tengzhi-exam-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.tengzhi-detail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dark);
}

.tengzhi-detail-item svg {
  width: 18px;
  height: 18px;
  color: var(--primary-color);
}

.tengzhi-exam-price {
  text-align: center;
  margin-bottom: 24px;
}

.tengzhi-price-label {
  font-size: 15px;
  color: var(--text-light);
}

.tengzhi-price-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-color);
}

/* Exam Features */
.tengzhi-exam-features {
  max-width: 1450px;
  margin: 0 auto;
}

.tengzhi-features-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 24px;
  text-align: center;
}

.tengzhi-feature-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tengzhi-feature-item {
  background: #fff;
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.05);
}

.tengzhi-feature-item svg {
  width: 40px;
  height: 40px;
  color: var(--primary-color);
  margin-bottom: 16px;
}

.tengzhi-feature-item h4 {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.tengzhi-feature-item p {
  font-size: 14px;
  color: var(--text-light);
}

/* CTA Section */
.tengzhi-section-cta {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 80px 60px;
  text-align: center;
}

.tengzhi-cta-content {
  max-width: 1450px;
  margin: 0 auto;
}

.tengzhi-cta-title {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.tengzhi-cta-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 32px;
  line-height: 1.6;
}

.tengzhi-cta-btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.tengzhi-btn-primary,
.tengzhi-btn-secondary,
.tengzhi-btn-outline,
.tengzhi-cta-btn-primary,
.tengzhi-cta-btn-secondary {
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}

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

.tengzhi-btn-primary:hover {
  background: #5ab840;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(120,201,80,0.3);
}

.tengzhi-btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

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

.tengzhi-btn-outline:hover {
  background: var(--primary-color);
  color: #fff;
}

.tengzhi-btn-large {
  width: 100%;
  padding: 16px;
  font-size: 16px;
}

.tengzhi-cta-btn-primary {
  background: var(--accent-color);
  color: #333;
}

.tengzhi-cta-btn-primary:hover {
  background: #ffed4a;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255,216,90,0.4);
}

.tengzhi-cta-btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.6);
}

.tengzhi-cta-btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  transform: translateY(-3px);
}

/* Background Alt */
.tengzhi-bg-alt {
  background: #f8fafc;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .tengzhi-section-pad {
    padding: 60px 40px;
  }
  
  .tengzhi-zhiku-hero {
    padding: 80px 40px;
  }
  
  .tengzhi-site-footer .tengzhi-footer-inner {
    padding: 0 40px;
  }
  
  .tengzhi-news-grid,
  .tengzhi-video-grid,
  .tengzhi-question-categories,
  .tengzhi-mode-cards,
  .tengzhi-feature-list {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tengzhi-knowledge-categories {
    grid-template-columns: 1fr;
  }
  
  .tengzhi-video-platforms,
  .tengzhi-exam-types {
    grid-template-columns: 1fr;
  }
  
  .tengzhi-question-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tengzhi-hero-stats {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .tengzhi-section-pad {
    padding: 40px 20px;
  }
  
  .tengzhi-zhiku-hero {
    padding: 60px 20px;
    min-height: 400px;
  }
  
  .tengzhi-hero-title {
    font-size: 32px;
  }
  
  .tengzhi-hero-subtitle {
    font-size: 16px;
  }
  
  .tengzhi-hero-stats {
    gap: 24px;
  }
  
  .tengzhi-stat-number {
    font-size: 36px;
  }
  
  .tengzhi-stat-label {
    font-size: 14px;
  }
  
  .tengzhi-section-title {
    font-size: 28px;
  }
  
  .tengzhi-news-grid,
  .tengzhi-video-grid,
  .tengzhi-question-categories,
  .tengzhi-mode-cards,
  .tengzhi-feature-list,
  .tengzhi-question-stats {
    grid-template-columns: 1fr;
  }
  
  .tengzhi-news-tabs {
    gap: 12px;
  }
  
  .tengzhi-tab-btn {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  .tengzhi-platform-card {
    padding: 24px;
  }
  
  .tengzhi-platform-stats {
    flex-direction: column;
    gap: 12px;
  }
  
  .tengzhi-prompt-content {
    flex-direction: column;
    text-align: center;
  }
  
  .tengzhi-cta-title {
    font-size: 28px;
  }
  
  .tengzhi-cta-btn-group {
    flex-direction: column;
  }
  
  .tengzhi-cta-btn-primary,
  .tengzhi-cta-btn-secondary {
    width: 100%;
  }
  
  .tengzhi-site-footer .tengzhi-footer-inner {
    padding: 0 20px;
  }
}