/* ==============================
   老人帮首页样式 lb_homepage.css v4.0
   视觉全面升级 - 暖色调 + CSS变量
   ============================== */

/* --- 全局重置 & 基础 --- */
*, *::before, *::after {
  box-sizing: border-box;
}

.lb-homepage {
  font-size: var(--font-size-sm);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

.lb-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* --- 动画关键帧 --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* 浮动圆形动画 */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

@keyframes floatFast {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

/* ================================
   1. 顶部导航栏
   ================================ */
.lb-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 70px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.lb-nav.scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.lb-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}

.lb-nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}

.lb-nav-logo {
  font-size: 28px;
  line-height: 1;
}

.lb-nav-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.lb-nav-search {
  flex: 1;
  max-width: 400px;
}

.lb-search-input {
  width: 100%;
  padding: 10px 18px;
  border: 2px solid #E2E8F0;
  border-radius: 24px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-bg);
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.lb-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(232, 97, 58, 0.15);
}

.lb-search-input::placeholder {
  color: var(--color-text-light);
}

.lb-nav-fontsize {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.lb-fontsize-btn {
  padding: 6px 12px;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-sm);
  background: var(--color-card);
  color: var(--color-text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lb-fontsize-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lb-fontsize-btn.active {
  background: var(--gradient-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
}

/* 字号等级 */
.lb-homepage.lb-font-small { font-size: var(--font-size-xs); }
.lb-homepage.lb-font-medium { font-size: var(--font-size-sm); }
.lb-homepage.lb-font-large { font-size: var(--font-size-body); }

/* ================================
   2. Hero 轮播区 - 暖色升级
   ================================ */
.lb-hero {
  position: relative;
  width: 100%;
  height: 360px;
  overflow: hidden;
  background: var(--gradient-hero);
}

.lb-hero-track {
  position: relative;
  z-index: 2;
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.lb-hero-slide {
  min-width: 100%;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.lb-hero-content {
  max-width: 700px;
  text-align: center;
  color: #FFFFFF;
  animation: fadeInUp 0.6s ease;
}

.lb-hero-title {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 16px;
  line-height: 1.3;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.lb-hero-desc {
  font-size: var(--font-size-body);
  margin: 0 0 28px;
  opacity: 0.95;
  line-height: var(--line-height);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.lb-hero-btn {
  display: inline-block;
  padding: 14px 36px;
  background: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.lb-hero-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.lb-hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.lb-hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.lb-hero-dot.active {
  background: #FFFFFF;
  transform: scale(1.2);
}

/* --- 浮动圆形几何装饰 --- */
.lb-hero-bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.lb-shape {
  position: absolute;
  border-radius: 50%;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
}

/* 浮动圆形1 - 左上大圆 */
.lb-shape-1 {
  width: 280px;
  height: 280px;
  background: rgba(255, 255, 255, 0.12);
  top: -80px;
  left: -60px;
  animation: floatSlow 8s ease-in-out infinite;
  filter: blur(1px);
}

/* 浮动圆形2 - 右上中圆 */
.lb-shape-2 {
  width: 160px;
  height: 160px;
  background: rgba(255, 255, 255, 0.15);
  top: 30px;
  right: 10%;
  animation: float 6s ease-in-out infinite;
}

/* 浮动圆形3 - 左下小圆 */
.lb-shape-3 {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.2);
  bottom: 40px;
  left: 20%;
  animation: floatFast 5s ease-in-out infinite;
}

/* 浮动圆形4 - 右中小圆 */
.lb-shape-4 {
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.35);
  top: 50%;
  right: 15%;
  animation: float 7s ease-in-out infinite;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* 大装饰圆环 - 右下 */
.lb-shape-5 {
  width: 300px;
  height: 300px;
  border: 3px solid rgba(255, 255, 255, 0.15);
  background: transparent;
  bottom: -120px;
  right: -80px;
  animation: floatSlow 12s ease-in-out infinite;
  border-radius: 50%;
}

/* 小菱形 - 左中 */
.lb-shape-6 {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.25);
  top: 40%;
  left: 12%;
  transform: rotate(45deg);
  animation: floatFast 9s ease-in-out infinite;
  border-radius: 8px;
}

/* --- SVG波浪分割线 --- */
.lb-hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  z-index: 5;
  line-height: 0;
}

.lb-hero-wave svg {
  display: block;
  width: 100%;
  height: 50px;
}

/* ================================
   3. 快捷入口网格 - 升级
   ================================ */
.lb-section {
  padding: var(--space-2xl) 0;
}

.lb-section-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 28px;
  position: relative;
  padding-left: 16px;
  text-align: left;
}

.lb-section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background: var(--gradient-primary);
}

.lb-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.lb-section-header .lb-section-title {
  margin-bottom: 0;
}

.lb-section-more {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

.lb-section-more:hover {
  color: var(--color-primary-dark);
}

.lb-quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 16px;
}

.lb-quick-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 16px;
  min-height: 150px;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: var(--transition);
  animation: fadeInUp 0.5s ease backwards;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

/* 卡片渐变背景 - 各不相同 */
.lb-quick-card:nth-child(1) {
  background: linear-gradient(135deg, #FFF0EC, #FFE4DB);
  animation-delay: 0.05s;
}
.lb-quick-card:nth-child(2) {
  background: linear-gradient(135deg, #E8F8F0, #D4F2E4);
  animation-delay: 0.1s;
}
.lb-quick-card:nth-child(3) {
  background: linear-gradient(135deg, #FFF8E8, #FFEFC0);
  animation-delay: 0.15s;
}
.lb-quick-card:nth-child(4) {
  background: linear-gradient(135deg, #EDF4FF, #D6E8FF);
  animation-delay: 0.2s;
}
.lb-quick-card:nth-child(5) {
  background: linear-gradient(135deg, #F8F0FF, #EDE0FF);
  animation-delay: 0.25s;
}
.lb-quick-card:nth-child(6) {
  background: linear-gradient(135deg, #FFF0F5, #FFE0EA);
  animation-delay: 0.3s;
}
.lb-quick-card:nth-child(7) {
  background: linear-gradient(135deg, #FFF0EC, #FFE4DB);
  animation-delay: 0.35s;
}
.lb-quick-card:nth-child(8) {
  background: linear-gradient(135deg, #E8F8F0, #D4F2E4);
  animation-delay: 0.4s;
}

.lb-quick-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.lb-quick-card:nth-child(1):hover { background: linear-gradient(135deg, #FFE8E0, #FFD6C7); }
.lb-quick-card:nth-child(2):hover { background: linear-gradient(135deg, #D4F0E0, #BEE8D0); }
.lb-quick-card:nth-child(3):hover { background: linear-gradient(135deg, #FFF0CC, #FFE5A0); }
.lb-quick-card:nth-child(4):hover { background: linear-gradient(135deg, #D6E8FF, #BCD8FF); }
.lb-quick-card:nth-child(5):hover { background: linear-gradient(135deg, #ECE0FF, #DCC8FF); }
.lb-quick-card:nth-child(6):hover { background: linear-gradient(135deg, #FFE0E8, #FFCCD5); }
.lb-quick-card:nth-child(7):hover { background: linear-gradient(135deg, #FFE8E0, #FFD6C7); }
.lb-quick-card:nth-child(8):hover { background: linear-gradient(135deg, #D4F0E0, #BEE8D0); }

.lb-quick-icon {
  font-size: 48px;
  line-height: 1;
}

.lb-quick-text {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

/* ================================
   4. 热门推荐区 - 升级
   ================================ */
.lb-hot-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.lb-hot-scroll::-webkit-scrollbar {
  height: 4px;
}

.lb-hot-scroll::-webkit-scrollbar-track {
  background: #F1F5F9;
  border-radius: 2px;
}

.lb-hot-scroll::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 2px;
}

.lb-hot-card {
  min-width: 260px;
  max-width: 280px;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--color-text);
  scroll-snap-align: start;
  transition: var(--transition);
  animation: slideIn 0.5s ease backwards;
  border-left: 4px solid var(--color-primary);
}

.lb-hot-card:nth-child(1) { animation-delay: 0.1s; border-left-color: #3B82F6; }
.lb-hot-card:nth-child(2) { animation-delay: 0.2s; border-left-color: var(--color-primary); }
.lb-hot-card:nth-child(3) { animation-delay: 0.3s; border-left-color: var(--color-accent); }
.lb-hot-card:nth-child(4) { animation-delay: 0.4s; border-left-color: #7C3AED; }

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

.lb-hot-bar {
  height: 4px;
  width: 100%;
}

.lb-hot-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  margin: 16px 16px 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lb-hot-tag {
  display: inline-block;
  margin: 0 16px;
  padding: 4px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.lb-hot-excerpt {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin: 8px 16px 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 阅读更多链接 */
.lb-hot-readmore {
  display: inline-block;
  margin: 0 16px 16px;
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.lb-hot-readmore:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* 日期和分类pill标签 */
.lb-hot-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 16px 16px;
}

.lb-hot-date {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: #F1F5F9;
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

/* ================================
   5. 分类内容区（Tab切换） - 暖色升级
   ================================ */
.lb-tabs-section {
  background: var(--color-card);
}

.lb-tabs-header {
  display: flex;
  gap: 0;
  position: relative;
  border-bottom: 2px solid #E2E8F0;
  margin-bottom: 28px;
}

.lb-tab-btn {
  padding: 14px 28px;
  background: none;
  border: none;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.3s;
  position: relative;
}

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

.lb-tab-btn.active {
  color: var(--color-primary);
}

.lb-tab-indicator {
  position: absolute;
  bottom: -2px;
  left: 0;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lb-tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

.lb-tab-panel.active {
  display: block;
}

.lb-tab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.lb-article-card {
  display: block;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border-left: 4px solid #3B82F6;
  text-decoration: none;
  color: var(--color-text);
  transition: var(--transition);
}

.lb-article-card:hover {
  background: var(--color-card);
  box-shadow: var(--shadow-card);
  transform: translateX(4px);
}

.lb-article-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.4;
}

.lb-article-excerpt {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin: 0 0 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lb-article-date {
  font-size: 12px;
  color: var(--color-text-light);
  background: #F1F5F9;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.lb-no-posts {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: 40px 0;
  grid-column: 1 / -1;
}

/* ================================
   6. 互动专区 - 暖色升级
   ================================ */
.lb-interactive {
  background: var(--color-bg);
}

.lb-interactive-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.lb-poll {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.lb-poll-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 16px;
}

.lb-poll-question {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin: 0 0 20px;
  font-weight: 500;
}

.lb-poll-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lb-poll-option {
  padding: 12px 20px;
  background: var(--color-bg);
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: left;
}

.lb-poll-option:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.lb-poll-option.selected {
  border-color: var(--color-primary);
  background: var(--gradient-primary);
  color: #FFFFFF;
}

.lb-notice {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.lb-notice-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 16px;
}

.lb-notice-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.lb-notice-item {
  display: flex;
  gap: var(--space-md);
  padding: 12px 0;
  border-bottom: 1px solid #F1F5F9;
  align-items: flex-start;
}

.lb-notice-item:last-child {
  border-bottom: none;
}

.lb-notice-date {
  font-size: 12px;
  color: var(--color-text-light);
  background: #F1F5F9;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
}

.lb-notice-text {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

/* ================================
   7. 信任感模块
   ================================ */
.lb-trust-section {
  background: var(--color-bg-warm);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.lb-trust-section .lb-section-title {
  text-align: center;
  padding-left: 0;
}

.lb-trust-section .lb-section-title::before {
  display: none;
}

.lb-section-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.lb-trust-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.lb-trust-item {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.lb-trust-number {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
  line-height: 1.2;
}

.lb-trust-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ================================
   8. 底部 Footer - 暖色升级
   ================================ */
.lb-footer {
  background: #1E293B;
  color: #CBD5E1;
  padding: var(--space-2xl) 0 0;
}

.lb-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.lb-footer-heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: #FFFFFF;
  margin: 0 0 16px;
}

.lb-footer-text {
  font-size: var(--font-size-xs);
  color: #94A3B8;
  margin: 0 0 8px;
  line-height: var(--line-height);
}

.lb-footer-link {
  display: block;
  font-size: var(--font-size-xs);
  color: #94A3B8;
  text-decoration: none;
  margin-bottom: 8px;
  transition: var(--transition-fast);
}

.lb-footer-link:hover {
  color: #FFFFFF;
}

.lb-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 36px;
  padding: 20px 0;
  border-top: 1px solid #334155;
  font-size: var(--font-size-xs);
  color: #64748B;
}

.lb-back-top {
  padding: 10px 20px;
  background: #334155;
  border: none;
  border-radius: var(--radius-sm);
  color: #CBD5E1;
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
}

.lb-back-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.lb-back-top:hover {
  background: var(--gradient-primary);
  color: #FFFFFF;
}

/* ================================
   滚动淡入动画 - JS启用后才动画，默认内容可见
   ================================ */
.lb-fade-in {
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.lb-animate .lb-fade-in {
  opacity: 0;
  transform: translateY(20px);
}

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

/* ================================
   响应式 - 768px~1023px 平板
   ================================ */
@media (max-width: 1023px) {
  .lb-quick-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .lb-hot-scroll .lb-hot-card {
    min-width: 220px;
  }

  .lb-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .lb-trust-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ================================
   响应式 - <768px 手机
   ================================ */
@media (max-width: 767px) {
  .lb-homepage {
    font-size: 15px;
  }

  .lb-nav-inner {
    gap: 10px;
  }

  .lb-nav-name {
    font-size: 18px;
  }

  .lb-nav-search {
    max-width: 200px;
  }

  .lb-search-input {
    padding: 8px 14px;
    font-size: 14px;
  }

  .lb-nav-fontsize {
    gap: 2px;
  }

  .lb-fontsize-btn {
    padding: 5px 8px;
    font-size: 12px;
  }

  .lb-hero {
    height: 240px;
  }

  .lb-hero-title {
    font-size: 24px;
  }

  .lb-hero-desc {
    font-size: 15px;
  }

  .lb-hero-btn {
    padding: 12px 28px;
    font-size: 15px;
  }

  .lb-section {
    padding: 32px 0;
  }

  .lb-section-title {
    font-size: var(--font-size-lg);
    margin-bottom: 20px;
  }

  .lb-quick-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .lb-quick-card {
    padding: 16px 8px;
    min-height: 120px;
  }

  .lb-quick-icon {
    font-size: 36px;
  }

  .lb-quick-text {
    font-size: var(--font-size-xs);
  }

  .lb-hot-card {
    min-width: 200px;
  }

  .lb-tab-btn {
    padding: 10px 16px;
    font-size: 15px;
  }

  .lb-tab-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .lb-interactive-grid {
    grid-template-columns: 1fr;
  }

  .lb-trust-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .lb-trust-number {
    font-size: 28px;
  }

  .lb-footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .lb-footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}