:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #64748b;
            --background: #f8fafc;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --success: #10b981;
            --warning: #f59e0b;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
        }
        
        .dark-mode {
            --background: #0f172a;
            --card-bg: #1e293b;
            --text: #f1f5f9;
            --text-light: #94a3b8;
            --border: #334155;
        }
        
        body {
            background-color: var(--background);
            color: var(--text);
            transition: var(--transition);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1450px;
            margin: 0 auto;
            padding: 15px 20px;
        }
        .category-nav .container{
            max-width: 100%;

        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary), #1e40af);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 24px;
            font-weight: 700;
        }

        .logo, .logo:link, .logo:visited, .logo:hover, .logo:active {
            color: #ffffff;
            text-decoration: none;
        }
        
        .logo i {
            font-size: 28px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        
        nav a {
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        
        nav a:hover, nav a.active {
            color: white;
        }
        
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: white;
            transition: var(--transition);
        }
        
        nav a:hover::after, nav a.active::after {
            width: 100%;
        }
        
        .header-actions {
            display: flex;
            gap: 15px;
            align-items: center;
        }
        
        .search-box {
            display: flex;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 8px 15px;
            align-items: center;
        }
        
        .search-box input {
            background: transparent;
            border: none;
            color: white;
            outline: none;
            width: 180px;
            padding: 0 10px;
        }
        
        .search-box input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        
        .theme-toggle {
            background: transparent;
            border: none;
            color: white;
            font-size: 20px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        
        .theme-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        
        /* 英雄区域 */
        .hero {
            padding: 60px 0 40px;
            text-align: center;
            background: linear-gradient(to bottom, rgba(37, 99, 235, 0.1), transparent);
        }
        
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            background: linear-gradient(to right, var(--primary), #8b5cf6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        .stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        
        .stat-item {
            background: var(--card-bg);
            padding: 20px 30px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            min-width: 180px;
        }
        
        .stat-item .number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .stat-item .label {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        
        /* 分类导航 */
        .category-nav {
            padding: 25px 0;
            position: sticky;
            top: 70px;
            background: var(--background);
            z-index: 90;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }
        
        .categories {
            display: flex;
            gap: 5px;
            overflow-x: auto;
            padding: 5px 0;
            justify-content: center;
        }
        
        .category-btn {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 8px 20px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            color: var(--text);
        }
        
        .category-btn:hover, .category-btn.active {
            background: var(--primary);
            color: var(--background);
            border-color: var(--primary);
        }
        
        /* 系统镜像列表 */
        .system-list {
            padding: 30px 0 60px;
            gap: 25px;
        }

        .system-list.container {
            display: none;
        }

        .system-list.container.active {
            display: block;
        }

        
        .system-card {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            height: fit-content;
        }
        
        .system-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }
        
        .card-header {
            padding: 20px;
            display: flex;
            align-items: center;
            cursor: pointer;
        }
        
        .os-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        .windows-icon {
            background: linear-gradient(135deg, #0078d7, #00a4ef);
            color: white;
        }
        
        .linux-icon {
            background: linear-gradient(135deg, #ff7700, #ff5500);
            color: white;
        }
        
        .mac-icon {
            background: linear-gradient(135deg, #a2aaad, #000000);
            color: white;
        }
        
        .server-icon {
            background: linear-gradient(135deg, #10b981, #059669);
            color: white;
        }
        
        .card-header-content {
            flex-grow: 1;
        }
        
        .card-header h3 {
            font-size: 1.3rem;
            margin-bottom: 5px;
            display: flex;
            align-items: center;
        }
        
        .card-header h3 .new-badge {
            background: var(--warning);
            color: white;
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 50px;
            margin-left: 10px;
        }
        
        .card-header p {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        .card-header .expand-icon {
            font-size: 1.2rem;
            transition: var(--transition);
        }
        
        .card-header.active .expand-icon {
            transform: rotate(180deg);
        }
        
        .download-links {
            background: rgba(37, 99, 235, 0.05);
            border-top: 1px solid var(--border);
            max-height: 0;
            overflow: auto;
            transition: var(--transition);
        }
        
        .download-links.active {
            max-height: 5000px;
        }
        
        .download-grid {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 0;
        }
        
        .download-item {
            border-bottom: 1px solid var(--border);
            border-right: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 60px;
        }
        
        .download-item:nth-child(7n) {
            border-right: none;
        }
        
        .download-links .download-item {
            border-bottom: none;
        }
        
        .download-links .btn {
            background: var(--primary);
            color: white;
            text-decoration: none;
            padding: 8px 20px;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            display: inline-block;
            margin-left: auto;
        }
        
        .download-links .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        
        .file-info {
            display: flex;
            padding: 15px 20px;
            background: rgba(0, 0, 0, 0.02);
            color: var(--text-light);
            font-size: 0.85rem;
            justify-content: space-between;
        }
        
        .hash {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        /* 页脚 */
        footer {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        /* 桌面端固定五列 */
        @media (min-width: 1100px) {
            .footer-content {
                grid-template-columns: repeat(5, 1fr);
            }
        }
        
        .footer-column h4 {
            margin-bottom: 20px;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .footer-links a:hover {
            color: var(--primary);
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        /* 移动端菜单 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }
        
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #ffb3d1;
            box-shadow: var(--shadow);
            z-index: 99;
        }
        
        .mobile-nav.active {
            display: block;
        }
        
        .mobile-nav ul {
            flex-direction: column;
            padding: 20px;
            gap: 0;
        }
        
        .mobile-nav li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .mobile-nav li:last-child {
            border-bottom: none;
        }
        
        .mobile-nav a {
            display: block;
            padding: 7.5px 0;
            color: white;
        }
        
        /* 响应式设计 */
        @media (max-width: 900px) {
            .header-content {
                flex-wrap: wrap;
                gap: 15px;
            }
            
            nav {
                order: 3;
                width: 100%;
            }
            
            nav ul {
                justify-content: center;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .stat-item {
                padding: 15px 20px;
                min-width: 140px;
            }
            
            .stat-item .number {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
            }
            
            .desktop-nav {
                display: none;
            }
            
            .header-content {
                flex-wrap: nowrap;
                justify-content: space-between;
            }
            
            .header-actions {
                gap: 10px;
            }
            
            .search-box {
                display: none;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .stats {
                flex-direction: column;
                gap: 15px;
            }
            
            .stat-item {
                min-width: auto;
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }
            
            .categories {
                flex-wrap: wrap;
                justify-content: center;
                gap: 8px;
            }
            
            .category-btn {
                font-size: 0.9rem;
                padding: 6px 16px;
            }
            
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            
            .download-item {
                min-height: 50px;
                padding: 8px;
                border: 1px solid var(--border);
                border-radius: 6px;
                margin: 2px;
                background: var(--card-bg);
            }
            
            .download-item:nth-child(2n) {
                border-right: 1px solid var(--border);
            }
            
            .download-links .btn {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
        }
        
        @media (max-width: 600px) {
            .system-list {
                grid-template-columns: 1fr;
            }
            
            .hero {
                padding: 30px 0 15px;
            }
            
            .hero h1 {
                font-size: 1.6rem;
            }
            
            .container {
                padding: 5px 10px;
            }
            
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 6px;
            }
            
            .download-item {
                padding: 6px;
                font-size: 0.85rem;
            }
            
            .download-links .btn {
                padding: 8px 16px;
                font-size: 0.85rem;
                margin: 5px 0;
            }
            
            .file-info {
                flex-direction: column;
                gap: 10px;
                text-align: left;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        
        @media (max-width: 480px) {
            .logo {
                font-size: 20px;
            }
            
            .logo i {
                font-size: 24px;
            }
            
            .hero h1 {
                font-size: 1.4rem;
            }
            
            .hero p {
                font-size: 0.9rem;
            }
            
            .stat-item .number {
                font-size: 1.8rem;
            }
            
            .stat-item .label {
                font-size: 0.85rem;
            }
            
            .category-btn {
                font-size: 0.8rem;
                padding: 5px 12px;
            }
        }
        
        .custom-iso-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 12px;
            display: block;
        }
        .version{
            cursor: pointer;
        }
        /*超链接*/
        a:link {
            text-decoration: none;
	        color: var(--color);
        }
        a:hover {
            text-decoration: none;
	        color: blue;
        }
         /* 通用最新版徽标样式（用于列表项） */
        .new-badge {
            background: var(--warning);
            color: white;
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 50px;
            margin-left: 10px;
        }

        .notice-body {
            background-color: #ff9800; 
            color: white; 
            padding: 10px 0; 
            text-align: center; 
            font-size: 14px; 
            position: sticky; 
            top: 0; 
            z-index: -1;
        }
        .notice-body-main {
            max-width: 1200px; 
            margin: 0 auto; 
            display: flex; 
            align-items: center;
            justify-content: center;
        }
        .notice-body-main-title {
            min-width: 90px;
            font-weight: 600;
            padding-right: 16px;
        }
        .notice-body-main-content {
            text-align: left;
        }
        .notice-body-close {
            padding-left: 16px;
            cursor: pointer;
        }
        @media (max-width: 600px) {
            .notice-body-main {
                flex-direction: column;
            }
            .notice-body-main-content {
                padding: 16px;
            }
        }
        /* 捐助弹窗样式 */
        .donation-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 9999;
            justify-content: center;
            align-items: center;
        }
        
        .donation-content {
            background-color: #fff;
            border-radius: 10px;
            padding: 25px;
            width: 90%;
            max-width: 500px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.3);
            position: relative;
            text-align: center;
        }
        
        .donation-close {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 1.5rem;
            cursor: pointer;
            color: #999;
            transition: color 0.3s;
        }
        
        .donation-close:hover {
            color: #333;
        }
        
        .donation-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .donation-text {
            margin-bottom: 20px;
            line-height: 1.6;
            color: #555;
        }
        
        .donation-options {
            display: flex;
            justify-content: space-around;
            margin-bottom: 25px;
            flex-wrap: wrap;
        }
        
        .donation-option {
            text-align: center;
            cursor: pointer;
            padding: 10px;
            border-radius: 8px;
            transition: background-color 0.3s;
            margin: 5px;
        }
        
        .donation-option:hover {
            background-color: #f5f5f5;
        }
        
        .donation-option img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
            border: 1px solid #eee;
            border-radius: 5px;
        }
        
        .donation-option span {
            display: block;
            font-weight: 500;
        }
        
        .donation-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 15px;
        }
        
        .donation-remember {
            display: flex;
            align-items: center;
            font-size: 0.9rem;
            color: #666;
        }
        
        .donation-confirm {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .donation-confirm:hover {
            background-color: #2980b9;
        }
        
        body.dark-mode .donation-content {
            background-color: #2c3e50;
            color: #ecf0f1;
        }
        
        body.dark-mode .donation-title {
            color: #ecf0f1;
        }
        
        body.dark-mode .donation-text {
            color: #bdc3c7;
        }
        
        body.dark-mode .donation-option:hover {
            background-color: #34495e;
        }
        
        body.dark-mode .donation-remember {
            color: #bdc3c7;
        }