/* 全局变量与基础样式 */
:root {
  /* 颜色变量 */
  --primary-color: #425AFE;
  --primary-gradient: linear-gradient(90deg, #425AFE, #26C0FF);
  --secondary-color: #FF649E;
  --accent-color: #00C9A7;
  --text-primary: #222222;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --background-primary: #fafafa;
  --background-secondary: #ffffff;
  --background-tertiary: #F7FBFF;
  --border-color: #E8F0FF;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --transition-speed: 0.3s;
  
  /* 布局变量 */
  --container-padding: 4rem;
  --header-height: 80px;
  --section-spacing: 80px;
  --border-radius: 12px;
  --border-radius-lg: 20px;
}

/* 重置与基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background-color: var(--background-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) ease;
}

.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 16px;
  transition: all var(--transition-speed) ease;
  border: none;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 16px rgba(66, 90, 254, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(66, 90, 254, 0.4);
}

.btn-secondary {
  background: var(--background-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(66, 90, 254, 0.05);
  transform: translateY(-2px);
}

/* 区域样式 */
.section {
  padding: var(--section-spacing) 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

.section-title p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 控制面板 */
.control-panel {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
}

.control-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--background-secondary);
  padding: 12px;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
}

.control-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--primary-gradient);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition-speed) ease;
}

.control-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(66, 90, 254, 0.3);
}

/* Banner样式优化 */
.banner {
  position: relative;
  height: 600px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.banner-swiper {
  width: 100%;
  height: 100%;
  position: relative;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  display: flex;
  align-items: center;
}

.banner-slide.active {
  opacity: 1;
  z-index: 1;
}

.banner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  height: 100%;
}

.banner-text, .banner-demo {
  padding: 20px;
}

.banner-content h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
  color: white;
}

.banner-content h1 span {
  background: linear-gradient(90deg, #FFE160, #FFC952);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.banner-content p {
  font-size: 20px;
  margin-bottom: 30px;
  opacity: 0.9;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

.banner-btn {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}


.demo-placeholder {
  position: relative;
  cursor: pointer;
  transition: transform var(--transition-speed) ease;
}

.demo-placeholder:hover {
  transform: scale(1.02);
}

.demo-thumbnail {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 12px;
}

.play-btn {
  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;
  font-size: 24px;
  color: var(--primary-color);
  transition: all var(--transition-speed) ease;
}

.play-btn:hover {
  background: white;
  transform: translate(-50%, -50%) scale(1.1);
}

.demo-video {
  width: 100%;
  height: 300px;
  border-radius: 12px;
  display: block;
}

.demo-tags {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.demo-tags span {
  background: rgba(255, 255, 255, 0.2);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 14px;
  color: white;
  backdrop-filter: blur(5px);
}

/* Banner指示器 */
.banner-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.indicator-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  border: none;
}

.indicator-dot.active {
  width: 30px;
  border-radius: 6px;
  background: white;
}

.indicator-dot:hover {
  background: rgba(255, 255, 255, 0.8);
  transform: scale(1.1);
}

/* Banner箭头 */
.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  z-index: 10;
  border: none;
  opacity: 0.7;
}

.banner-arrow:hover {
  background: rgba(255, 255, 255, 0.3);
  opacity: 1;
  transform: translateY(-50%) scale(1.1);
}

.arrow-left {
  left: 20px;
}

.arrow-right {
  right: 20px;
}

/* 诊聊·斗AI入口模块 */
.zhenliao-entry {
  background: var(--background-tertiary);
  padding: 60px 0;
  position: relative;
  margin-top: -20px;
  border-radius: 0 0 40px 40px;
}

.zhenliao-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}

.zhenliao-text {
  flex: 1;
  min-width: 300px;
}

.zhenliao-text h3 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.zhenliao-text h3 span {
  color: var(--primary-color);
}

.zhenliao-text p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.zhenliao-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.zhenliao-tags span {
  background: var(--background-secondary);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  transition: all var(--transition-speed) ease;
}

.zhenliao-tags span:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(66, 90, 254, 0.1);
}

.zhenliao-btn {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.zhenliao-img {
  flex: 1;
  min-width: 300px;
  text-align: center;
  position: relative;
}

.zhenliao-img img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 25px rgba(66, 90, 254, 0.15);
  transition: transform var(--transition-speed) ease;
}

.zhenliao-img img:hover {
  transform: translateY(-5px);
}

/* 专业版核心优势 */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.advantage-item {
  background: var(--background-secondary);
  padding: 40px 30px;
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-speed) ease;
  border-top: 4px solid var(--primary-color);
  box-shadow: 0 2px 8px var(--shadow-color);
}

.advantage-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.advantage-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(66, 90, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.advantage-icon i {
  font-size: 28px;
  color: var(--primary-color);
}

.advantage-item h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.advantage-item p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 双品牌介绍 */
.brand-grid {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.brand-item {
  flex: 1;
  min-width: 300px;
  background: var(--background-secondary);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: 0 6px 18px var(--shadow-color);
  transition: transform var(--transition-speed) ease;
}

.brand-item:hover {
  transform: translateY(-5px);
}

.brand-item h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-item.pro h3 {
  color: var(--primary-color);
}

.brand-item.zhenliao h3 {
  color: var(--secondary-color);
}

.brand-item p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.brand-feature {
  list-style: none;
  margin-bottom: 24px;
}

.brand-feature li {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-feature li::before {
  content: "✓";
  color: var(--primary-color);
  font-weight: bold;
}

/* 合作案例 */
.case-slider {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 20px 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-color) #f0f0f0;
  scroll-behavior: smooth;
}

.case-slider::-webkit-scrollbar {
  height: 6px;
}

.case-slider::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 3px;
}

.case-item {
  flex: 0 0 320px;
  background: var(--background-secondary);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition: all var(--transition-speed) ease;
  box-shadow: 0 4px 12px var(--shadow-color);
  border: 1px solid var(--border-color);
}

.case-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.case-logo {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.case-logo img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all var(--transition-speed) ease;
}

.case-item:hover .case-logo img {
  filter: grayscale(0%);
  opacity: 1;
}

.case-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.case-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 底部CTA */
.cta {
  background: var(--primary-gradient);
  color: white;
  text-align: center;
  padding: 80px 0;
  border-radius: 40px;
  margin: 80px 20px;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="none"/><circle cx="20" cy="20" r="3" fill="white" opacity="0.1"/><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="80" r="4" fill="white" opacity="0.1"/></svg>');
  opacity: 0.2;
}

.cta h2 {
  font-size: 36px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.cta p {
  font-size: 18px;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto 30px;
  position: relative;
  z-index: 1;
}

.cta-btn {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* 工具提示 */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltip-text {
  visibility: hidden;
  width: 120px;
  background-color: var(--text-primary);
  color: white;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 12px;
}

.tooltip .tooltip-text::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: var(--text-primary) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* 导航栏升级：高级简约，贴合游戏官网质感 */
.header { 
  position: fixed; 
  top: 0; 
  left: 0; 
  right: 0; 
  background: rgba(255, 255, 255, 0.95); 
  backdrop-filter: blur(8px); 
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); 
  z-index: 999; 
  transition: all 0.3s ease;
}

/* 深色模式下的导航栏 */
[data-theme="dark"] .header {
  background: rgba(30, 30, 30, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* 导航栏布局 */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  height: 36px;
  width: auto;
  transition: opacity 0.3s ease;
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color, #425AFE);
  transition: color 0.3s ease;
}

.menu {
  display: flex;
  gap: 40px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu li a {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary, #333);
  transition: color 0.3s;
  position: relative;
  text-decoration: none;
}

.menu li a:hover,
.menu li a.active {
  color: var(--primary-color, #425AFE);
}

.menu li a.active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-color, #425AFE);
  border-radius: 3px;
}

.tools {
  display: flex;
  gap: 16px;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 4px;
  z-index: 1001;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary, #333);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--background-secondary, #fff);
  z-index: 1000;
  padding: 20px;
  overflow-y: auto;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
}

.mobile-menu.active {
  display: block;
  opacity: 1;
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color, #E8F0FF);
}

.mobile-menu-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-primary, #333);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.3s ease;
}

.mobile-menu-close:hover {
  color: var(--primary-color, #425AFE);
}

.mobile-menu-list {
  list-style: none;
  margin: 0 0 30px 0;
  padding: 0;
}

.mobile-menu-list li {
  margin-bottom: 10px;
}

.mobile-menu-list a {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  color: var(--text-primary, #333);
  border-radius: var(--border-radius, 12px);
  transition: all 0.3s ease;
  text-decoration: none;
}

.mobile-menu-list a:hover,
.mobile-menu-list a.active {
  background: var(--background-tertiary, #F7FBFF);
  color: var(--primary-color, #425AFE);
}

.mobile-menu-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 0;
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .menu {
    display: none !important;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .tools {
    display: none;
  }
  
  .nav-left {
    gap: 20px;
  }
}

@media (max-width: 576px) {
  .nav {
    height: 70px;
  }
  
  .logo-text {
    font-size: 20px;
  }
  
  .mobile-menu {
    padding: 15px;
  }
}

/* ========================================
   页脚样式
   ======================================== */

.footer {
  background: var(--background-tertiary, #F7FBFF);
  color: var(--text-primary, #222);
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-speed, 0.3s) ease;
}

/* 深色模式下的页脚 */
[data-theme="dark"] .footer {
  background: var(--background-secondary, #1e1e1e);
  color: var(--text-primary, #fff);
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-color, #425AFE), transparent);
  opacity: 0.3;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

/* 页脚logo区域 */
.footer-logo {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
}

.footer-logo .logo-text {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-color, #425AFE);
  margin-bottom: 20px;
  display: inline-block;
  transition: color var(--transition-speed, 0.3s) ease;
}

.footer-logo p {
  color: var(--text-secondary, #666);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 25px;
  opacity: 0.9;
}

/* 深色模式下的文字颜色 */
[data-theme="dark"] .footer-logo p {
  color: var(--text-secondary, #ccc);
}

.footer-brand {
  font-size: 14px;
  color: var(--text-secondary, #666);
  margin-bottom: 30px;
  display: block;
}

.footer-brand span {
  color: var(--primary-color, #425AFE);
  font-weight: 600;
  font-size: 15px;
  padding: 4px 8px;
  background: rgba(66, 90, 254, 0.1);
  border-radius: 4px;
  margin-left: 4px;
}

/* 社交链接 */
.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 30px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--background-secondary, #fff);
  color: var(--text-primary, #222);
  font-size: 18px;
  transition: all var(--transition-speed, 0.3s) ease;
  border: 1px solid var(--border-color, #E8F0FF);
  text-decoration: none;
}

.social-link:hover {
  background: var(--primary-color, #425AFE);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(66, 90, 254, 0.2);
  border-color: var(--primary-color, #425AFE);
}

/* 页脚导航区域 */
.footer-nav {
  flex: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 40px;
  max-width: 800px;
}

.footer-nav-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary, #222);
  position: relative;
  padding-bottom: 8px;
}

.footer-nav-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-color, #425AFE);
  border-radius: 2px;
}

.footer-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav-list li {
  margin-bottom: 12px;
  transition: transform var(--transition-speed, 0.3s) ease;
}

.footer-nav-list li:hover {
  transform: translateX(5px);
}

.footer-nav-list li a {
  color: var(--text-secondary, #666);
  font-size: 14px;
  transition: all var(--transition-speed, 0.3s) ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-nav-list li a::before {
  content: '→';
  font-size: 12px;
  opacity: 0;
  transform: translateX(-5px);
  transition: all var(--transition-speed, 0.3s) ease;
}

.footer-nav-list li a:hover {
  color: var(--primary-color, #425AFE);
  padding-left: 5px;
}

.footer-nav-list li a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-nav-list li:not(:has(a)) {
  color: var(--text-secondary, #666);
  font-size: 14px;
  line-height: 1.5;
  opacity: 0.9;
}

/* 深色模式下的导航链接颜色 */
[data-theme="dark"] .footer-nav-list li a {
  color: var(--text-secondary, #ccc);
}

[data-theme="dark"] .footer-nav-list li a:hover {
  color: var(--primary-color, #6d8cff);
}

/* 版权信息 */
.copyright {
  text-align: center;
  color: var(--text-tertiary, #999);
  font-size: 14px;
 
  position: relative;
  z-index: 1;
}

.copyright a {
  color: var(--primary-color, #425AFE);
  text-decoration: none;
  transition: color var(--transition-speed, 0.3s) ease;
  margin-left: 4px;
}

.copyright a:hover {
  color: var(--primary-color, #425AFE);
  text-decoration: underline;
}

/* 深色模式下的版权信息 */
[data-theme="dark"] .copyright {
  color: var(--text-tertiary, #888);
  border-top-color: var(--border-color, #333);
}

/* 回到顶部按钮 */
.footer-back-to-top {
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-color, #425AFE);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed, 0.3s) ease;
  border: none;
  opacity: 0.8;
  z-index: 2;
}

.footer-back-to-top:hover {
  opacity: 1;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(66, 90, 254, 0.3);
}

/* 响应式设计 */
@media (max-width: 992px) {
  .footer {
    padding: 60px 0 30px;
  }
  
  .footer-inner {
    gap: 30px;
  }
  
  .footer-nav {
    gap: 30px;
  }
  
  .footer-logo {
    min-width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .footer {
    padding: 50px 0 25px;
  }
  
  .footer-inner {
    flex-direction: column;
    gap: 40px;
  }
  
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }
  
  .footer-logo p {
    font-size: 14px;
  }
  
  .copyright {
    padding-top: 30px;
    font-size: 13px;
  }
}

@media (max-width: 576px) {
  .footer {
    padding: 40px 0 20px;
  }
  
  .footer-nav {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-logo .logo-text {
    font-size: 24px;
  }
  
  .social-link {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  .footer-back-to-top {
    right: 15px;
    bottom: 15px;
    width: 36px;
    height: 36px;
  }
}