/* ========================================
   玄晶引擎移动端专属样式
   技术栈: HTML + CSS + JavaScript
   公司名称: 玄晶引擎（四川）人工智能科技有限公司
   ======================================== */

/* CSS Variables - 移动端配色 */
:root {
  --primary-blue: #1E3A8A;
  --primary-blue-dark: #0F1F4A;
  --primary-blue-light: #3B82F6;
  --accent-orange: #F97316;
  --accent-orange-light: #FB923C;
  --bg-white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-gray: #E8ECF0;
  --text-dark: #1A1A2E;
  --text-gray: #5A5A6E;
  --text-light: #8A8A9A;
  --border-color: #E2E8F0;
  --success-green: #10B981;
  --error-red: #EF4444;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

/* Reset & Base - 移动端优化 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: calc(80px + var(--safe-bottom));
  min-height: 100vh;
}

/* 移动端容器 */
.container {
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ========================================
   顶部导航栏
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--bg-white);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-logo img {
  height: 32px;
  width: auto;
}

.header-logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
}

.menu-btn span {
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 全屏菜单 */
.fullscreen-menu {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-white);
  z-index: 999;
  padding: 24px 16px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}

.fullscreen-menu.active {
  transform: translateX(0);
}

.menu-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.menu-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-dark);
}

.menu-item a.active {
  color: var(--primary-blue);
}

.menu-item a svg {
  width: 20px;
  height: 20px;
  color: var(--text-light);
}

.menu-actions {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ========================================
   底部导航栏
   ======================================== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(64px + var(--safe-bottom));
  background: var(--bg-white);
  border-top: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding-bottom: var(--safe-bottom);
}

.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 100%;
  color: var(--text-gray);
  text-decoration: none;
  font-size: 11px;
  transition: color 0.2s ease;
}

.bottom-nav-item svg {
  width: 24px;
  height: 24px;
}

.bottom-nav-item.active {
  color: var(--primary-blue);
}

.bottom-nav-item.active svg {
  stroke: var(--primary-blue);
}

/* ========================================
   Hero区域 - 移动端
   ======================================== */
.hero {
  padding-top: 72px;
  padding-bottom: 32px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

.hero-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-title span {
  color: var(--accent-orange);
}

.hero-subtitle {
  font-size: 15px;
  line-height: 1.7;
  opacity: 0.9;
  margin-bottom: 28px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 28px;
}

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

.hero-stat-value {
  font-size: 24px;
  font-weight: 800;
}

.hero-stat-label {
  font-size: 12px;
  opacity: 0.8;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ========================================
   按钮样式 - 移动端
   ======================================== */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  min-height: 48px;
}

.btn-primary {
  background: var(--accent-orange);
  color: white;
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

.btn-secondary {
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary-blue);
  border: 1.5px solid var(--primary-blue);
}

.btn-ghost {
  background: transparent;
  color: var(--text-gray);
}

.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
  min-height: 40px;
}

/* ========================================
   卡片样式 - 移动端
   ======================================== */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-gray);
}

.card-body {
  color: var(--text-gray);
  font-size: 14px;
  line-height: 1.7;
}

/* ========================================
   功能卡片 - 横向滑动
   ======================================== */
.scroll-container {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 16px 16px;
  margin: 0 -16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.scroll-container::-webkit-scrollbar {
  display: none;
}

.scroll-card {
  flex: 0 0 280px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  scroll-snap-align: start;
}

.scroll-card-image {
  width: 100%;
  height: 140px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}

.scroll-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scroll-card-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.scroll-card-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ========================================
   标签样式
   ======================================== */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: rgba(30, 58, 138, 0.08);
  color: var(--primary-blue);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.tag-primary {
  background: var(--primary-blue);
  color: white;
}

.tag-orange {
  background: rgba(249, 115, 22, 0.1);
  color: var(--accent-orange);
}

/* ========================================
   列表样式
   ======================================== */
.list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.list-icon {
  width: 32px;
  height: 32px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success-green);
  flex-shrink: 0;
}

.list-icon svg {
  width: 16px;
  height: 16px;
}

.list-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.list-content p {
  font-size: 13px;
  color: var(--text-gray);
}

/* ========================================
   区块标题
   ======================================== */
.section {
  padding: 32px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 24px;
  padding: 0 16px;
}

.section-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-gray);
}

/* ========================================
   定价卡片
   ======================================== */
.pricing-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary-blue);
}

.pricing-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-orange);
  color: white;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.pricing-name {
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}

.pricing-desc {
  font-size: 13px;
  color: var(--text-gray);
  text-align: center;
  margin-bottom: 20px;
}

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

.pricing-price .currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary-blue);
}

.pricing-price .amount {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1;
}

.pricing-price .period {
  font-size: 14px;
  color: var(--text-gray);
}

.pricing-features {
  margin-bottom: 24px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
}

.pricing-feature svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.pricing-feature.included svg {
  color: var(--success-green);
}

.pricing-feature.not-included {
  color: var(--text-light);
}

.pricing-feature.not-included svg {
  color: var(--text-light);
}

/* ========================================
   Tab切换
   ======================================== */
.tab-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 16px 12px;
  margin: 0 -16px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  flex: 0 0 auto;
  padding: 10px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-gray);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--primary-blue);
  color: white;
  border-color: var(--primary-blue);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ========================================
   客户案例卡片
   ======================================== */
.case-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.case-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}

.case-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}

.case-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-info h4 {
  font-size: 15px;
  font-weight: 600;
}

.case-info p {
  font-size: 12px;
  color: var(--text-gray);
}

.case-body {
  padding: 16px;
}

.case-quote {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-gray);
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--accent-orange);
}

.case-result {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: rgba(16, 185, 129, 0.08);
  border-radius: var(--radius-md);
}

.case-result svg {
  width: 20px;
  height: 20px;
  color: var(--success-green);
  flex-shrink: 0;
}

.case-result span {
  font-size: 13px;
  color: var(--text-dark);
  font-weight: 500;
}

/* ========================================
   时间线
   ======================================== */
.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: 24px;
}

.timeline-dot {
  position: absolute;
  left: -24px;
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--primary-blue);
  border-radius: 50%;
  border: 3px solid var(--bg-white);
  box-shadow: 0 0 0 2px var(--primary-blue);
}

.timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 13px;
  color: var(--text-gray);
}

/* ========================================
   统计数据
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-blue);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-gray);
}

/* ========================================
   团队成员
   ======================================== */
.team-card {
  text-align: center;
  padding: 20px;
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
  color: white;
}

.team-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  font-size: 13px;
  color: var(--primary-blue);
  margin-bottom: 8px;
}

.team-bio {
  font-size: 12px;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ========================================
   联系信息
   ======================================== */
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(30, 58, 138, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-info h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-info p {
  font-size: 13px;
  color: var(--text-gray);
}

/* ========================================
   浮动AI助手
   ======================================== */
.ai-float {
  position: fixed;
  bottom: calc(80px + var(--safe-bottom));
  right: 16px;
  z-index: 999;
}

.ai-button {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 20px rgba(30, 58, 138, 0.4);
  position: relative;
}

.ai-button svg {
  width: 28px;
  height: 28px;
}

.ai-pulse {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-blue);
  border-radius: 50%;
  opacity: 0.4;
  animation: aiPulse 2s ease-out infinite;
  z-index: -1;
}

.ai-pulse.delay {
  animation-delay: 1s;
}

@keyframes aiPulse {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.8); opacity: 0; }
}

/* AI聊天窗口 */
.ai-chat {
  position: fixed;
  bottom: calc(144px + var(--safe-bottom));
  right: 16px;
  left: 16px;
  max-width: 400px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: none;
  overflow: hidden;
}

.ai-chat.active {
  display: block;
}

.ai-chat-header {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-chat-title {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
}

.ai-chat-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ai-chat-avatar svg {
  width: 20px;
  height: 20px;
}

.ai-chat-title h4 {
  font-size: 15px;
  font-weight: 600;
}

.ai-chat-title span {
  font-size: 12px;
  opacity: 0.8;
}

.ai-chat-close {
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  border: none;
}

.ai-chat-body {
  padding: 16px;
  max-height: 300px;
  overflow-y: auto;
  background: var(--bg-light);
}

.ai-message {
  margin-bottom: 12px;
}

.ai-message-bot .ai-message-content {
  background: var(--bg-white);
  padding: 12px 16px;
  border-radius: 16px 16px 16px 4px;
  font-size: 14px;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
}

.ai-message-user {
  text-align: right;
}

.ai-message-user .ai-message-content {
  display: inline-block;
  background: var(--primary-blue);
  color: white;
  padding: 10px 16px;
  border-radius: 16px 16px 4px 16px;
  font-size: 14px;
}

.ai-chat-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 8px;
}

.ai-chat-footer input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  font-size: 14px;
  outline: none;
}

.ai-chat-footer button {
  width: 44px;
  height: 44px;
  background: var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  border: none;
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--bg-white);
  padding: 32px 16px;
  margin-bottom: calc(64px + var(--safe-bottom));
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.footer-logo img {
  height: 28px;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.7;
  margin-bottom: 24px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-gray);
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  color: var(--primary-blue);
  flex-shrink: 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 8px;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: 12px;
  color: var(--text-light);
}

/* ========================================
   折叠面板
   ======================================== */
.accordion-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  cursor: pointer;
}

.accordion-header h4 {
  font-size: 15px;
  font-weight: 600;
}

.accordion-header svg {
  width: 20px;
  height: 20px;
  color: var(--text-gray);
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header svg {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-body {
  max-height: 500px;
}

.accordion-content {
  padding: 0 16px 16px;
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ========================================
   搜索框
   ======================================== */
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
}

.search-box svg {
  width: 20px;
  height: 20px;
  color: var(--text-light);
  flex-shrink: 0;
}

.search-box input {
  flex: 1;
  border: none;
  font-size: 14px;
  outline: none;
  background: transparent;
}

/* ========================================
   视频卡片
   ======================================== */
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
}

.video-thumbnail {
  position: relative;
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
}

.video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
}

.video-play svg {
  width: 24px;
  height: 24px;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.video-meta {
  font-size: 12px;
  color: var(--text-gray);
}

/* ========================================
   报告卡片
   ======================================== */
.report-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}

.report-tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(30, 58, 138, 0.08);
  color: var(--primary-blue);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
}

.report-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.report-desc {
  font-size: 13px;
  color: var(--text-gray);
  margin-bottom: 16px;
  line-height: 1.6;
}

.report-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-light);
}

/* ========================================
   文档卡片
   ======================================== */
.doc-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
}

.doc-icon {
  width: 48px;
  height: 48px;
  background: rgba(30, 58, 138, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  flex-shrink: 0;
}

.doc-icon svg {
  width: 24px;
  height: 24px;
}

.doc-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.doc-content p {
  font-size: 13px;
  color: var(--text-gray);
}

.doc-arrow {
  margin-left: auto;
  color: var(--text-light);
}

.doc-arrow svg {
  width: 20px;
  height: 20px;
}

/* ========================================
   动画
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

/* ========================================
   工具类
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary-blue); }
.text-orange { color: var(--accent-orange); }
.text-gray { color: var(--text-gray); }
.text-light { color: var(--text-light); }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }

.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

.p-16 { padding: 16px; }
.p-20 { padding: 20px; }
.p-24 { padding: 24px; }

.bg-white { background: var(--bg-white); }
.bg-light { background: var(--bg-light); }

.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }