/* 
 * 全局样式
 * 网站主要样式定义，包括布局、颜色和组件
 */

/*=====================================================
  变量定义 - 颜色、尺寸和动画时间
=====================================================*/
:root {
  /* 主题颜色 */
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --dark-color: #2c3e50;
  --light-color: #ecf0f1;
  
  /* 文字颜色 */
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #ecf0f1;
  
  /* 背景颜色 */
  --bg-primary: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --bg-secondary: rgba(255, 255, 255, 0.9);
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-hero: linear-gradient(135deg, rgba(236, 240, 241, 0.8) 0%, rgba(255, 255, 255, 0.9) 100%);
  
  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
  
  /* 边框 */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 20px;
  --border-radius-full: 50px;
  
  /* 间距 */
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-lg: 20px;
  --spacing-xl: 30px;
  
  /* 字体大小 */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.9rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-xxl: 2rem;
  --font-size-hero: 3.5rem;
  
  /* 动画时间 */
  --transition-speed: 0.3s;
  --animation-speed-fast: 0.3s;
  --animation-speed-normal: 0.6s;
  --animation-speed-slow: 1s;
  
  /* 布局尺寸 */
  --container-max-width: 1200px;
  --content-width: 800px;
  --navbar-height: 70px;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  flex: 1;
}

/*=====================================================
  导航栏样式
=====================================================*/
.navbar {
  background-color: var(--bg-secondary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-speed);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: var(--container-max-width);
  margin: 0 auto;
  position: relative;
}

/* Logo样式 */
.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 30px;
  width: 30px;
  margin-right: var(--spacing-sm);
  transition: all var(--transition-speed);
  object-fit: contain;
}

.logo:hover .logo-img {
  transform: rotate(20deg);
}

.logo span {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: all var(--transition-speed);
}

.logo:hover span {
  transform: scale(1.05);
}

/* 导航链接 */
.nav-links {
  display: flex;
  list-style: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-links li {
  margin: 0 var(--spacing-md);
}

.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: all var(--transition-speed);
  position: relative;
  padding: 5px 0;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  transition: all var(--transition-speed);
  opacity: 0.8;
}

.nav-links a:hover::after {
  width: 100%;
}

/* 活动链接样式 */
.nav-links a.active {
  color: var(--primary-color);
  font-weight: 600;
  position: relative;
}

.nav-links a.active::after {
  width: 100%;
  height: 2px;
}

/* 社交图标 */
.social-icons {
  display: flex;
  align-items: center;
}

.social-icon {
  margin-left: var(--spacing-md);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  transition: all var(--transition-speed);
}

.social-icon:hover {
  color: var(--primary-color);
  transform: translateY(-3px);
}

/*=====================================================
  英雄区域样式
=====================================================*/
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--navbar-height);
  position: relative;
  overflow: hidden;
  background: var(--bg-hero);
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%233498db' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
  opacity: 0.8;
  z-index: 0;
}

body.dark-theme .hero {
  background: linear-gradient(135deg, rgba(44, 62, 80, 0.8) 0%, rgba(26, 28, 32, 0.9) 100%);
}

body.dark-theme .hero::before {
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%233498db' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
  opacity: 0.5;
}

/* 英雄内容卡片 */
.hero-content {
  z-index: 2;
  max-width: var(--content-width);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  animation: fadeInUp var(--animation-speed-normal) ease-out forwards;
  will-change: transform, opacity;
  transform: translateY(30px);
  opacity: 0;
}

.hero-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  border-radius: var(--border-radius-lg);
  z-index: -1;
}

/* 标题样式 */
.hero-title {
  font-size: var(--font-size-hero);
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fadeInUp var(--animation-speed-normal) ease-out forwards;
  position: relative;
  display: inline-block;
  will-change: transform, opacity;
}

/* 文字动画效果 */
.hero-title .animated-text {
  display: inline-block;
  animation: textWave 3s ease-in-out infinite;
  transition: all var(--transition-speed);
}

.hero-title:hover .animated-text {
  animation-play-state: paused;
}

.hero-title .animated-text:hover {
  transform: scale(1.2);
  text-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

/* 字符动画延迟 */
.hero-title .char1 { animation-delay: 0.0s; }
.hero-title .char2 { animation-delay: 0.1s; }
.hero-title .char3 { animation-delay: 0.2s; }
.hero-title .char4 { animation-delay: 0.3s; }
.hero-title .char5 { animation-delay: 0.4s; }
.hero-title .char6 { animation-delay: 0.5s; }
.hero-title .char7 { animation-delay: 0.6s; }
.hero-title .char8 { animation-delay: 0.7s; }

/* 文字波浪动画 */
@keyframes textWave {
  0%, 100% {
    transform: translateY(0);
  }
  25% {
    transform: translateY(-10px) rotate(3deg);
  }
  50% {
    transform: translateY(0) scale(1.05);
  }
  75% {
    transform: translateY(5px) rotate(-3deg);
  }
}

/* 副标题样式 */
.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
  animation: fadeInUp var(--animation-speed-normal) ease-out 0.2s forwards;
  opacity: 0;
  will-change: transform, opacity;
}

.subtitle-text {
  position: relative;
  display: inline-block;
  padding: 3px 8px;
  font-weight: 500;
  background-color: rgba(0, 0, 0, 0.05);
  border-radius: var(--border-radius-sm);
  margin-right: 5px;
  will-change: transform, opacity;
}

.subtitle-text i {
  margin-right: 5px;
  color: var(--primary-color);
}

/*=====================================================
  打字机效果
=====================================================*/
.typewriter {
  position: relative;
  display: inline-block;
  min-width: 1em;
  min-height: 1.2em;
  white-space: nowrap;
  vertical-align: middle;
  line-height: normal;
}

.typewriter-container {
  display: inline-flex;
  position: relative;
  min-width: 10ch;
  min-height: 1.5em;
  background-color: rgba(0, 0, 0, 0.05);
  border-radius: var(--border-radius-sm);
  padding: 0 4px;
  will-change: transform, opacity;
  align-items: center;
}

body.dark-theme .typewriter-container {
  background-color: rgba(255, 255, 255, 0.1);
}

.typewriter::after {
  content: '|';
  position: absolute;
  display: inline-block;
  right: -0.1em;
  top: 0;
  animation: blink 0.7s infinite;
  color: var(--primary-color);
  font-weight: bold;
  height: 100%;
  line-height: inherit;
}

body.dark-theme .typewriter::after {
  color: #2ecc71;
  text-shadow: 0 0 5px rgba(46, 204, 113, 0.5);
}

body.dark-theme .typewriter-text {
  color: #ecf0f1;
  text-shadow: 0 0 2px rgba(255, 255, 255, 0.3);
  font-weight: 500;
}

.typewriter-text {
  font-weight: 500;
  display: inline-block;
  min-width: 1px;
  min-height: 1em;
  vertical-align: middle;
}

/* 占位符样式 */
.typewriter-placeholder {
  display: inline-block;
  width: 1px;
  opacity: 0;
  pointer-events: none;
}

/*=====================================================
  按钮样式
=====================================================*/
.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  animation: fadeInUp var(--animation-speed-normal) ease-out 0.4s forwards;
  opacity: 0;
  flex-wrap: wrap;
  will-change: opacity, transform;
}

.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
}

.btn-primary {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 7px 20px rgba(52, 152, 219, 0.4);
}

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

.btn-outline:hover {
  background: var(--text-primary);
  color: white;
  transform: translateY(-3px);
}

.btn i {
  margin-right: 8px;
}

/*=====================================================
  动画背景
=====================================================*/
.animated-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.animated-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  filter: blur(60px);
}

.shape1 {
  width: 300px;
  height: 300px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  top: 20%;
  left: 10%;
  animation: float 15s ease-in-out infinite;
}

.shape2 {
  width: 250px;
  height: 250px;
  background: linear-gradient(45deg, #e74c3c, #f39c12);
  top: 40%;
  right: 15%;
  animation: float 20s ease-in-out infinite;
}

.shape3 {
  width: 200px;
  height: 200px;
  background: linear-gradient(45deg, #9b59b6, #3498db);
  bottom: 15%;
  left: 20%;
  animation: float 18s ease-in-out infinite;
}

/* 动画时长变量 */
.shape-extra-0 { animation-duration: 18s; }
.shape-extra-1 { animation-duration: 22s; }
.shape-extra-2 { animation-duration: 25s; }
.shape-extra-3 { animation-duration: 30s; }
.shape-extra-4 { animation-duration: 28s; }
.shape-extra-5 { animation-duration: 20s; }
.shape-extra-6 { animation-duration: 23s; }
.shape-extra-7 { animation-duration: 26s; }

/*=====================================================
  特性部分样式
=====================================================*/
.features {
  padding: var(--spacing-xl) 0;
  background-color: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-xxl);
}

.features-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.feature-card {
  background-color: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-speed);
  text-align: center;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-speed);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
  color: var(--secondary-color);
}

.feature-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: var(--font-size-md);
}

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

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(20px, -30px) rotate(5deg);
  }
  50% {
    transform: translate(-20px, -15px) rotate(-5deg);
  }
  75% {
    transform: translate(-10px, 10px) rotate(3deg);
  }
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/*=====================================================
  浮动元素
=====================================================*/
.floating-element {
  position: absolute;
  z-index: 1;
  opacity: 0.3;
  animation: floatingIcons 20s ease-in-out infinite;
  will-change: transform;
}

@keyframes floatingIcons {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  20% {
    transform: translate(15px, -15px) rotate(10deg);
  }
  40% {
    transform: translate(-10px, -30px) rotate(-5deg);
  }
  60% {
    transform: translate(-20px, 10px) rotate(-15deg);
  }
  80% {
    transform: translate(10px, 20px) rotate(5deg);
  }
}

/*=====================================================
  标题提示样式
=====================================================*/
.title-container {
  position: relative;
  display: inline-block;
}

.title-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(52, 152, 219, 0.2);
  padding: 8px 15px;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  white-space: nowrap;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  pointer-events: none;
  animation: pulse 2s infinite;
  z-index: 10;
  width: auto;
  margin: 0 auto;
}

body.dark-theme .title-hint {
  background-color: rgba(52, 152, 219, 0.3);
  color: var(--text-light);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hint-icon {
  margin-right: 5px;
  animation: movePointer 1.5s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.9;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.7;
    transform: translate(-50%, -50%) scale(1.05);
  }
}

@keyframes movePointer {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(5px);
  }
}

.hero-title:hover .title-hint {
  opacity: 0;
  visibility: hidden;
}

.hero-title .animated-text:hover ~ .title-hint {
  opacity: 0;
  visibility: hidden;
}

/*=====================================================
  移动菜单按钮
=====================================================*/
.mobile-only {
  display: none;
}

.mobile-only:hover {
  transform: scale(1.1);
}

/* 页脚样式 */
#footer {
    width: 100%;
    background-color: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(231, 231, 231, 0.5);
    padding: 20px 0;
    margin-top: 30px;
}

.footer-container {
    text-align: center;
    padding: 20px 0;
    color: #6c757d;
    font-size: 14px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-container div {
    margin: 8px 0;
}

.footer-container a {
    color: #6c757d;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-container a:hover {
    color: #007bff;
    text-decoration: underline;
}

#running-days {
    font-weight: bold;
    color: #007bff;
}

.copyright-info {
    font-size: 14px;
}

.runtime-info {
    font-size: 13px;
    margin-top: 5px;
}

.beian-info {
    font-size: 12px;
    margin-top: 8px;
}

/* Toast提示框样式 */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 25px;
  border-radius: 50px;
  font-size: 1rem;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  text-align: center;
  max-width: 90%;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  bottom: 50px;
}

body.dark-theme .toast {
  background-color: rgba(255, 255, 255, 0.8);
  color: var(--dark-bg-color);
}

/* 复制按钮悬停效果 */
#copy-email:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

#copy-email:active {
  transform: scale(0.95);
}

/* 关于页面样式 */
.about-content {
  margin-bottom: 50px;
}

.about-text {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.about-text p {
  margin-bottom: 20px;
  color: var(--dark-color);
}

.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-speed);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--primary-color);
  display: flex;
  align-items: center;
}

.skill-category h3 i {
  margin-right: 10px;
  font-size: 1.6rem;
}

.skill-category ul {
  list-style: none;
  padding-left: 10px;
}

.skill-category li {
  margin-bottom: 12px;
  position: relative;
  padding-left: 20px;
  color: var(--dark-color);
}

.skill-category li:before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--primary-color);
  border-radius: 50%;
}

body.dark-theme .skill-category {
  background: var(--dark-card-bg);
}

body.dark-theme .skill-category li {
  color: var(--dark-text-color);
}

body.dark-theme .about-text p {
  color: var(--dark-text-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar-container {
    flex-direction: column;
    padding: 10px;
  }
  
  .nav-links {
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-links li {
    margin: 5px 10px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    margin-bottom: 10px;
  }
  
  .features-container {
    grid-template-columns: 1fr;
  }
}