:root {
  /* 主色调 */
  --primary-color: #667eea;
  --primary-dark: #764ba2;
  
  /* 辅助色 */
  --accent-color: #ff6b6b;
  --success-color: #27ca40;
  --warning-color: #ffd93d;
  
  /* 背景色 */
  --bg-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  --bg-white: #fff;
  --bg-gray: #f8f9fa;
  
  /* 文字色 */
  --text-primary: #333;
  --text-secondary: #666;
  --text-muted: #999;
  --text-white: #fff;
  
  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  transition: color var(--transition-fast);
}

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

.nav-links a:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  padding: 20px;
}

.mobile-menu a {
  display: block;
  padding: 12px 20px;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-menu a:hover {
  background: rgba(102, 126, 234, 0.1);
}

.mobile-menu a:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

/* Hero区域 */
.hero {
  padding: 150px 0 100px;
}

.hero-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 60px;
}

.hero-left {
  flex: 1;
}

.hero-left h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 15px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 20px;
}

.description {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: 30px;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent-color) 0%, #ee5a5a 100%);
  color: var(--text-white);
  padding: 15px 30px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  box-shadow: 0 4px 20px rgba(255, 107, 107, 0.4);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(255, 107, 107, 0.5);
}

.download-btn:active {
  transform: translateY(-1px) scale(0.98);
}

.download-btn:focus {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.btn-icon {
  font-size: 20px;
}

.btn-version {
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.learn-btn {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-white);
  padding: 15px 30px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  transition: background var(--transition-fast);
}

.learn-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.learn-btn:active {
  transform: scale(0.98);
}

.learn-btn:focus {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.update-badge {
  display: inline-flex;
  align-items: center;
  background: linear-gradient(135deg, var(--warning-color) 0%, #ff9500 100%);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: 20px;
  font-weight: 600;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.hero-right {
  flex: 1;
  display: flex;
  justify-content: center;
}

.plugin-preview {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  width: 320px;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-gray);
}

.preview-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: var(--success-color); }

.preview-title {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 20px;
}

.preview-content {
  padding: 20px;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.preview-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 15px;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: var(--text-secondary);
  transition: transform var(--transition-fast);
}

.preview-card:hover {
  transform: scale(1.05);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.card-icon.pdd { background: linear-gradient(135deg, var(--accent-color), #ee5a5a); }
.card-icon.ai { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.card-icon.duozan { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.card-icon.wuhen { background: linear-gradient(135deg, #fa709a, #fee140); }

/* 功能介绍 */
.features {
  background: var(--bg-white);
  padding: 80px 0;
}

.features h2 {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 50px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-card {
  position: relative;
  text-align: center;
  padding: 30px;
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
  transition: left 0.5s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.feature-card:hover::before {
  left: 100%;
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 下载区域 */
.download {
  padding: 80px 0;
  color: var(--text-white);
}

.download-content {
  text-align: center;
}

.download h2 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 15px;
}

.download-desc {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 40px;
}

.download-options {
  max-width: 500px;
  margin: 0 auto;
}

.download-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 20px 25px;
  text-decoration: none;
  color: var(--text-white);
  transition: background var(--transition-fast);
}

.download-option:hover {
  background: rgba(255, 255, 255, 0.25);
}

.download-option:active {
  transform: scale(0.98);
}

.download-option:focus {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.option-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.option-icon.chrome {
  background: linear-gradient(135deg, #4285f4, #34a853, #fbbc05, #ea4335);
}

.option-info {
  flex: 1;
  text-align: left;
  padding: 0 20px;
}

.option-title {
  display: block;
  font-size: 18px;
  font-weight: 600;
}

.option-version {
  font-size: 14px;
  opacity: 0.8;
}

.option-arrow {
  font-size: 24px;
  opacity: 0.7;
}

.download-tip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  font-size: 14px;
  opacity: 0.8;
}

.install-guide {
  max-width: 500px;
  margin: 40px auto 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 25px;
  text-align: left;
}

.install-guide h4 {
  font-size: 16px;
  margin-bottom: 15px;
}

.install-guide ol {
  list-style-position: inside;
  font-size: 14px;
  line-height: 2;
  opacity: 0.9;
}

/* 更新日志 */
.update {
  background: var(--bg-white);
  padding: 80px 0;
}

.update h2 {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 50px;
}

.update-list {
  max-width: 800px;
  margin: 0 auto;
}

.update-item {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.update-version {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary-color);
  margin-right: 20px;
}

.update-date {
  font-size: 14px;
  color: var(--text-muted);
}

.update-changes {
  margin-top: 20px;
  list-style: none;
}

.update-changes li {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
  font-size: 14px;
  color: var(--text-secondary);
}

.update-changes li:last-child {
  border-bottom: none;
}

/* 联系作者 */
.contact {
  padding: 80px 0;
  color: var(--text-white);
}

.contact h2 {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 50px;
}

.contact-content {
  text-align: center;
}

.contact-info {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
}

.contact-icon {
  font-size: 24px;
}

.contact-text {
  color: var(--text-white);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.contact-text:hover {
  opacity: 0.8;
}

.contact-text:focus {
  outline: 3px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.contact-qr img {
  width: 150px;
  height: 150px;
  border-radius: var(--radius-md);
  background: var(--bg-white);
  padding: 10px;
}

.contact-qr span {
  font-size: 14px;
  opacity: 0.8;
}

/* 页脚 */
.footer {
  background: rgba(0, 0, 0, 0.2);
  padding: 30px 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }

  .hero-left h1 {
    font-size: 32px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

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

  .contact-info {
    flex-direction: column;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}