/* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 英雄区样式 */
        .hero {
            background-color: #fff;
            padding: 60px 0;
        }
        
        .hero-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 50px;
        }
        
        .hero-text {
            flex: 1;
        }
        
        .hero-text h1 {
            font-size: 36px;
            font-weight: bold;
            color: #333;
            margin-bottom: 15px;
            line-height: 1.3;
        }
        
        .hero-text .subtitle {
            font-size: 16px;
            color: #666;
            margin-bottom: 30px;
        }
        
        .hero-buttons {
            display: flex;
            gap: 15px;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: bold;
            text-decoration: none;
            border-radius: 5px;
            transition: all 0.3s;
            cursor: pointer;
        }
        
        .btn-primary {
            background-color: #000;
            color: #fff;
            border: 2px solid #000;
        }
        
        .btn-primary:hover {
            background-color: #333;
        }
        
        .btn-secondary {
            background-color: #ff3b30;
            color: #fff;
            border: 2px solid #ff3b30;
        }
        
        .btn-secondary:hover {
            background-color: #e03128;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
        }
        
        .hero-image img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
        }
        
        /* 主要内容区样式 */
        .main-content {
            padding: 40px 0;
        }
        
        .section-title {
            text-align: center;
            font-size: 28px;
            font-weight: bold;
            color: #333;
            margin-bottom: 40px;
        }
        
        .features-section {
            background-color: #fff;
            padding: 60px 0;
            margin: 40px 0;
        }
        
        .features-header {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .features-header h2 {
            font-size: 24px;
            font-weight: bold;
            color: #333;
            margin-bottom: 10px;
        }
        
        .features-header p {
            color: #666;
            font-size: 16px;
        }
        
        .stats {
            display: flex;
            justify-content: center;
            gap: 80px;
            margin: 40px 0;
            flex-wrap: wrap;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-value {
            font-size: 32px;
            font-weight: bold;
            color: #333;
            display: block;
        }
        
        .stat-label {
            font-size: 14px;
            color: #666;
            margin-top: 5px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .feature-card {
            background-color: #fafafa;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        
        .feature-card h3 {
            font-size: 18px;
            font-weight: bold;
            color: #333;
            margin-bottom: 15px;
        }
        
        .feature-card p {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
        }
        
        /* 下载区样式 */
        .download-section {
            background-color: #f5f5f5;
            padding: 60px 0;
            text-align: center;
        }
        
        .download-btn {
            background-color: #ff3b30;
            color: #fff;
            font-size: 20px;
            font-weight: bold;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            display: inline-block;
            margin: 20px 0;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(255, 59, 48, 0.3);
        }
        
        .download-btn:hover {
            background-color: #e03128;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 59, 48, 0.4);
        }
        
        /* 页脚样式 */
        footer {
            background-color: #333;
            color: #fff;
            padding: 40px 0;
            text-align: center;
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .footer-links {
            margin: 20px 0;
        }
        
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            margin: 0 15px;
            font-size: 14px;
        }
        
        .footer-links a:hover {
            color: #fff;
        }
        
        .copyright {
            margin-top: 20px;
            font-size: 12px;
            color: #999;
        }
        
        /* 相关链接 */
        .related-links {
            background-color: #fff;
            padding: 60px 0;
            margin: 40px 0;
        }

        .related-links-title {
            text-align: center;
            font-size: 24px;
            font-weight: bold;
            color: #333;
            margin-bottom: 30px;
        }

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

        .related-link-card {
            background-color: #fafafa;
            border: 1px solid #eaeaea;
            border-radius: 8px;
            padding: 15px;
            transition: all 0.3s ease;
            text-decoration: none;
            color: #333;
            display: block;
        }

        .related-link-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-color: #ff3b30;
        }

        .related-link-desc {
            font-size: 14px;
            line-height: 1.4;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text h1 {
                font-size: 28px;
            }
            
            .hero-buttons {
                justify-content: center;
            }
            
            .stats {
                gap: 40px;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .related-links-grid {
                grid-template-columns: 1fr;
            }
        }

/* ===== 友情链接 ===== */
.flink-section {
    padding: 2.5rem 1rem;
    border-top: 1px solid rgba(128, 128, 128, 0.2);
}
.flink-section .container,
.flink-section .inner,
.flink-section .wrap {
    max-width: 1200px;
    margin: 0 auto;
}
.flink-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.flinks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem 0.75rem;
}
.flink-item {
    font-size: 0.8125rem;
    text-decoration: none;
    opacity: 0.85;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: opacity 0.2s ease;
}
.flink-item:hover {
    opacity: 1;
}
@media (max-width: 640px) {
    .flinks-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 全局组件（悬浮条 / 回顶 / 友链等）===== */
.float-dl-banner {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 9000;
  width: min(420px, calc(100% - 32px));
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.float-dl-banner.is-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.float-dl-close {
  position: absolute;
  top: 6px;
  right: 10px;
  border: none;
  background: none;
  color: rgba(255, 255, 255, 0.55);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.float-dl-close:hover {
  color: #fff;
}
.float-dl-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 40px 14px 16px;
  color: #fff;
  text-decoration: none;
}
.float-dl-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.float-dl-text strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}
.float-dl-text small {
  display: block;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.65);
}
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 9100;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.45);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  transform: translateY(-3px);
}
@media (max-width: 640px) {
  .float-dl-banner {
    width: calc(100% - 24px);
    bottom: 12px;
  }
  .back-to-top {
    right: 14px;
    bottom: 18px;
    width: 40px;
    height: 40px;
  }
}