/* ========== 全局CSS变量 ========== */
:root {
  --ai-blue: #2563eb;
  --ai-blue-light: #3b82f6;
  --ai-purple: #7c3aed;
  --ai-gradient: linear-gradient(135deg, var(--ai-blue), var(--ai-purple));
  --text-dark: #1e293b;
  --text-gray: #64748b;
  --bg-light: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --success: #10b981;
}

/* ========== 全局重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #f0f9ff, #f8fafc);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========== 导航栏样式 ========== */
.navbar {
  background: white !important;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06) !important;
  padding: 16px 0 !important;
  position: sticky;
  top: 0;
  z-index: 1000;
  border: none !important;
  border-top: none !important;
  border-bottom: none !important;
  border-left: none !important;
  border-right: none !important;
}

.navbar-light {
  border: none !important;
}

.navbar-expand-lg {
  border: none !important;
}

.navbar-brand {
  font-weight: 800;
  font-size: 1.5rem !important;
  display: flex;
  align-items: center;
  gap: 8px;
  border: none !important;
  text-decoration: none;
  padding: 0 !important;
  margin-right: 0 !important;
}

.navbar-brand:hover,
.navbar-brand:focus {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  text-decoration: none;
}

.navbar-brand img {
  transition: transform 0.3s ease;
  border: none !important;
}

.navbar-brand:hover img {
  transform: scale(1.05);
}

.navbar-toggler {
  border: 1px solid var(--ai-blue) !important;
  font-size: 1rem !important;
}

.navbar-toggler:focus {
  box-shadow: none !important;
}

.navbar-nav {
  border: none !important;
}

.nav-item {
  border: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.nav-item:hover,
.nav-item:focus {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  background: transparent !important;
}

.nav-link {
  color: var(--text-dark) !important;
  margin-left: 32px;
  font-weight: 500 !important;
  font-size: 1rem !important;
  transition: all 0.3s ease;
  position: relative;
  border: none !important;
  border-top: none !important;
  border-bottom: none !important;
  text-decoration: none;
  padding: 10px 16px !important;
  background: transparent !important;
  border-radius: 8px;
}

/* 下划线效果 */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  border-radius: 2px;
}

/* 悬浮效果 */
.nav-link:hover {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), rgba(118, 75, 162, 0.08)) !important;
  color: #667eea !important;
  transform: translateY(-2px);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link:focus,
.nav-link:active {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  background: transparent !important;
}

/* 选中状态 */
.nav-link.active {
  color: white !important;
  border: none !important;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3) !important;
}

.nav-link.active::after {
  display: none;
}

.nav-link.active:hover {
  background: linear-gradient(135deg, #7c8ef0 0%, #8a5ab5 100%) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4) !important;
}

/* ========== 页脚样式 ========== */
.site-footer {
  background: white;
  border-top: 1px solid var(--border);
  color: var(--text-gray);
  padding: 32px 0;
  text-align: center;
  font-size: 0.95rem;
  margin-top: auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--ai-blue);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.site-footer a:hover {
  color: var(--ai-purple);
  text-decoration: underline;
}

.copyright {
  margin: 0;
  font-size: 0.9rem;
}

/* ========== 回到顶部按钮 ========== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 16px;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(100px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-8px) scale(1.1);
  box-shadow: 0 12px 32px rgba(102, 126, 234, 0.6);
  background: linear-gradient(135deg, #7c8ef0 0%, #8a5ab5 100%);
}

.back-to-top:active {
  transform: translateY(-5px) scale(1.05);
}

/* 火箭图标动画 */
.back-to-top i {
  transition: transform 0.3s ease;
  animation: rocket-float 2s ease-in-out infinite;
}

.back-to-top:hover i {
  transform: rotate(-5deg);
}

/* 发射动画 */
.back-to-top.launching {
  animation: launch 0.6s ease-out;
}

.back-to-top.launching i {
  animation: rocket-launch 0.6s ease-out;
}

/* 火箭悬浮动画 */
@keyframes rocket-float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-3px) rotate(-2deg);
  }
  75% {
    transform: translateY(3px) rotate(2deg);
  }
}

/* 火箭发射动画 */
@keyframes launch {
  0% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-20px) scale(1.2);
  }
  100% {
    transform: translateY(-1000px) scale(0.5);
    opacity: 0;
  }
}

@keyframes rocket-launch {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-45deg) scale(1.5);
  }
}

/* 火箭尾焰效果 */
.back-to-top::before {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 0;
  background: linear-gradient(to bottom, rgba(255, 149, 0, 0.8), transparent);
  border-radius: 3px;
  opacity: 0;
  transition: all 0.3s ease;
}

.back-to-top:hover::before {
  height: 20px;
  opacity: 1;
}

.back-to-top.launching::before {
  height: 60px;
  opacity: 1;
  animation: flame 0.6s ease-out;
}

@keyframes flame {
  0% {
    height: 20px;
    opacity: 1;
  }
  100% {
    height: 80px;
    opacity: 0;
  }
}

/* ========== 主体内容 ========== */
main {
  flex: 1;
  padding-top: 0;
  padding-bottom: 80px;
}

/* ========== 表格样式 ========== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

table thead {
  background: var(--ai-gradient);
  color: white;
}

table thead th {
  padding: 16px 20px;
  text-align: left;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: all 0.2s ease;
}

table tbody tr:hover {
  background: linear-gradient(135deg, #f0f9ff, #faf5ff);
}

table tbody tr:last-child {
  border-bottom: none;
}

table tbody td {
  padding: 14px 20px;
  color: var(--text-dark);
  font-size: 0.95rem;
}

table tbody td:first-child {
  font-weight: 600;
  color: var(--ai-blue);
}
.detail-content img {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
}
/* 表格响应式 */
@media (max-width: 768px) {
  table {
    font-size: 0.85rem;
  }
  
  table thead th,
  table tbody td {
    padding: 10px 12px;
  }
}

/* ========== 响应式设计 ========== */
@media (max-width: 992px) {
  .nav-link {
    margin-left: 0 !important;
    padding: 12px 16px !important;
    font-size: 1rem !important;
    border-radius: 8px;
    margin-bottom: 6px;
  }
  
  /* 移动端下划线效果 */
  .nav-link::after {
    display: none;
  }
  
  /* 移动端悬浮效果 */
  .nav-link:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1)) !important;
    transform: translateX(8px);
  }
  
  /* 移动端选中状态 */
  .nav-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3) !important;
    transform: translateX(0);
  }
  
  .nav-link.active:hover {
    background: linear-gradient(135deg, #7c8ef0 0%, #8a5ab5 100%) !important;
    transform: translateX(8px);
  }
  
  .navbar-nav {
    margin-top: 15px;
    padding: 10px 0;
  }
  
  .nav-item {
    margin-bottom: 4px;
  }
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 50px;
    height: 50px;
    font-size: 1.3rem;
    border-radius: 14px;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 576px) {
  .navbar {
    padding: 8px 0;
  }

  .site-footer {
    padding: 24px 0;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 46px;
    height: 46px;
    font-size: 1.2rem;
    border-radius: 12px;
  }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: var(--ai-gradient);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--ai-purple), var(--ai-blue));
}

.site-footer {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #e2e8f0;
  position: relative;
  margin-top: 5rem;
  overflow: hidden;
}

/* 波浪分隔线 */
.footer-wave {
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.footer-wave svg {
  position: relative;
  display: block;
  width: calc(100% + 1.3px);
  height: 80px;
}

.footer-wave path {
  fill: #ffffff;
}

/* 背景装饰 */
.site-footer::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  top: -200px;
  right: -100px;
  pointer-events: none;
}

.site-footer::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -150px;
  left: -100px;
  pointer-events: none;
}

/* 容器 */
.footer-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 5rem 2rem 0;
  position: relative;
  z-index: 1;
}

/* 主内容区 */
.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 3fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== 品牌区域 ===== */

/* ===== 品牌区域 ===== */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.brand-logo {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.logo-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-icon:hover {
  transform: translateY(-5px) rotate(5deg);
  box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
}

.logo-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0 0 0.75rem 0;
  background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.logo-text p {
  font-size: 0.95rem;
  color: #94a3b8;
  line-height: 1.7;
  margin: 0;
}

/* 社交按钮 */
.social-connect {
  display: flex;
  gap: 1rem;
}

.social-btn {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 1.3rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.social-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  opacity: 0;
  transition: opacity 0.3s;
}

.social-btn:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
  color: white;
}

.social-btn:hover::before {
  opacity: 1;
}

.social-btn i {
  position: relative;
  z-index: 1;
}

/* 微信二维码弹窗 */
.wechat-trigger {
  position: relative;
  overflow: visible !important;
}

.wechat-qr-popup {
  position: absolute;
  bottom: calc(100% + 15px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  pointer-events: none;
}

.wechat-trigger:hover .wechat-qr-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.qr-arrow {
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: rgba(15, 23, 42, 0.98);
  border: 1px solid rgba(7, 193, 96, 0.3);
  border-top: none;
  border-left: none;
  transform: translateX(-50%) rotate(45deg);
}

.qr-content {
  background: rgba(15, 23, 42, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(7, 193, 96, 0.3);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  min-width: 200px;
}

.qr-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #07c160;
}

.qr-header i {
  font-size: 1.2rem;
}

.qr-image {
  background: white;
  padding: 0.75rem;
  border-radius: 10px;
  display: inline-block;
  margin-bottom: 0.75rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.qr-image img {
  display: block;
  width: 120px;
  height: 120px;
  border-radius: 4px;
}

.qr-tip {
  font-size: 0.85rem;
  color: #94a3b8;
  text-align: center;
}

/* ===== 导航区域 ===== */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.nav-section h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0 0 1.5rem 0;
  position: relative;
  padding-bottom: 0.75rem;
}

.nav-section h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  border-radius: 2px;
}

.nav-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.nav-section ul li a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  padding: 0.4rem 0;
}

.nav-section ul li a i {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
  color: #64748b;
}

.nav-section ul li a:hover {
  color: #60a5fa;
  padding-left: 0.5rem;
}

.nav-section ul li a:hover i {
  transform: translateX(4px);
  color: #60a5fa;
}

/* 联系方式列表 */
.contact-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.contact-list li i {
  color: #60a5fa;
  font-size: 0.9rem;
  width: 16px;
}

/* ===== 统计区域 ===== */
.footer-stats h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0 0 1.5rem 0;
  position: relative;
  padding-bottom: 0.75rem;
}

.footer-stats h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  border-radius: 2px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.stat-card:hover .stat-icon {
  transform: scale(1.1);
}

.stat-icon.today {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.stat-icon.total {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.stat-data {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #f1f5f9;
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: #94a3b8;
  font-weight: 500;
}

.stats-tip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #64748b;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  border-left: 3px solid #3b82f6;
}

.stats-tip i {
  color: #60a5fa;
}

/* ===== 友情链接区域 ===== */
.friend-links-section {
  padding: 3rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.links-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0 0 2rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  padding-bottom: 0.75rem;
}

.links-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  border-radius: 2px;
}

.links-title i {
  color: #60a5fa;
  font-size: 1rem;
}

.links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.link-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: #94a3b8;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  position: relative;
  white-space: nowrap;
}

.link-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  opacity: 0;
  transition: opacity 0.3s;
}

.link-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  color: #60a5fa;
}

.link-item:hover::before {
  opacity: 1;
}

.link-logo {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.9);
  padding: 2px;
}

.link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: #60a5fa;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.link-name {
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  z-index: 1;
}

/* ===== 底部版权 ===== */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0;
  font-size: 0.9rem;
  color: #64748b;
}

.copyright-text {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.copyright-text .divider {
  color: #475569;
}

.copyright-text a {
  color: #64748b;
  text-decoration: none;
  transition: color 0.3s ease;
}

.copyright-text a:hover {
  color: #60a5fa;
}

.powered-by {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.powered-by i.pulse {
  color: #ef4444;
  animation: pulse 1.5s ease-in-out infinite;
}

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

/* ==================== 响应式设计 ==================== */

@media (max-width: 1200px) {
  .footer-content {
    grid-template-columns: 1.5fr 2.5fr 1fr;
    gap: 2.5rem;
  }
  
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .footer-container {
    padding: 4rem 1.5rem 0;
  }
  
  .footer-wave svg {
    height: 60px;
  }
  
  .footer-content {
    gap: 2.5rem;
    padding-bottom: 2rem;
  }
  
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  .brand-logo {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .logo-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }
  
  .social-connect {
    justify-content: center;
  }
  
  .links-grid {
    gap: 0.625rem;
  }
  
  .link-item {
    padding: 0.5rem 0.75rem;
    font-size: 0.825rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
    padding: 1.5rem 0;
  }
  
  .copyright-text {
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .footer-container {
    padding: 3rem 1rem 0;
  }
  
  .footer-nav {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-card {
    padding: 1rem;
  }
  
  .stat-value {
    font-size: 1.5rem;
  }
  
  .logo-text h3 {
    font-size: 1.5rem;
  }
  
  .logo-icon {
    width: 55px;
    height: 55px;
    font-size: 1.8rem;
  }
  
  .social-btn {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  .links-grid {
    gap: 0.5rem;
    justify-content: center;
  }
  
  .friend-links-section {
    padding: 2rem 0 1.5rem;
  }
}