.go-btn:active {
    transform: scale(0.95);
    transition: transform 0.1s;
}
 
.sub-nodes.show {
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
 
@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}    
/* 新增样式调整 */
.backup-button {
    pointer-events: none;  /* 完全禁用点击事件 */
    cursor: default;        /* 修改光标样式 */
    opacity: 0.4;           /* 视觉弱化效果 */
    padding: 12px 50px 12px 12px;
}
 

 
.go-btn:hover {
    background: #1e4db7;
}    
    /* 新增样式调整 */
.backup-button {
    padding: 12px 50px 12px 12px; /* 调整内边距适配纯按钮 */
    text-align: left;
}
 
.go-btn {
    right: 8px; /* 调整按钮位置 */
    padding: 8px 16px;
}
        :root {
            --primary: #2d3436;
            --surface: #ffffff;
            --accent: #2563eb;
            --warning: #ffab00;
            --danger: #dc3545;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --hover-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }

        * {
            padding: 0;
            margin: 0;
            box-sizing: border-box;
            text-shadow: 3px 3px 6px rgb(22 22 21);
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
            min-height: 100vh;
            font-family: 'Segoe UI', system-ui, sans-serif;
            padding: 1.5rem;
        }

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

        .brand {
            text-align: center;
            margin-bottom: 2rem;
            background: linear-gradient(135deg, var(--accent) 0%, #639bff 100%);
            border-radius: 20px;
            box-shadow: 0 6px 12px 1px #232323;
            color: white;
            position: relative;
            padding: 1.2rem;
        }

        .announcement-bar {
            position: absolute;
            bottom: -40px;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 12px 24px;
            overflow: hidden;
            transform: translateY(0);
            transition: transform 0.3s ease;
        }

        .announcement-text {
            font-weight: 500;
            color: #fff;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
            white-space: nowrap;
            animation: scroll 15s linear infinite;
        }

        @keyframes scroll {
            0% { transform: translateX(100%); }
            100% { transform: translateX(-100%); }
        }

        .nav-grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .nav-grid {
            border-radius: 16px;
            background: linear-gradient(145deg, #e6e6e6, #ffffff);
            box-shadow: var(--shadow);
            padding: 1rem;
        }

        .nav-card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 6px 12px 1px #232323;
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .nav-card__header {

            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            flex-direction: column;
            text-align: center;
            background: #3F51B5;
        }

        .nav-card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 0.5rem;
        }

        .nav-card__subtitle {
            color: var(--warning);
            background: rgba(255, 171, 0, 0.1);
            padding: 4px 8px;
            border-radius: 6px;
            display: inline-block;
            text-align: center;
            box-shadow: 0 6px 12px 1px #2323234d;
        }

        .backup-buttons {
            padding: 1rem;
        }

        .button-container {
            position: relative;
        }

        .backup-button {
            display: block;
            width: 100%;
            background: #f8f9fa;
            border-radius: 10px;
            text-decoration: none;
            color: var(--primary);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            text-align: left;
            border: 2px solid transparent;
        }

        .backup-button:hover {
            border-color: var(--accent);
            background: rgba(37, 99, 235, 0.1);
        }

        .button-text {
            display: block;
            font-size: 0.9rem;
            margin-bottom: 0.3rem;
            color: var(--primary);
        }

        .button-status {
            font-size: 0.8rem;
            color: var(--warning);
            font-weight: 500;
        }

        .go-btn {
    right: 10px;
    top: 50%;
    background: var(--warning);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    width: 100%;
    box-shadow: 0 6px 12px 1px #0c0c0d;
        }

        .go-btn:hover {
            background: #ff9500;
        }

        .sub-nodes {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 10px;
            margin-top: 1rem;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 12px;
            animation: fadeIn 0.3s ease;
            max-height: 400px;
            overflow-y: auto;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .sub-nodes.show {
            opacity: 1;
            visibility: visible;
        }

        .sub-node {
            display: block;
            padding: 8px 12px;
            background: var(--accent);
            color: white !important;
            text-decoration: none;
            border-radius: 8px;
            font-size: 0.9rem;
            text-align: center;
            transition: transform 0.2s;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            min-width: 0;
        }

        .sub-node:hover {
            transform: translateY(-2px);
            box-shadow: 0 3px 8px rgba(0,0,0,0.1);
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .float-btn-group {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 1000;
        }

        .float-btn {
            position: relative;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 20px;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        .wechat-icon {
            width: 28px;
            height: 28px;
            fill: white;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .back-to-top {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--warning);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: all 0.3s ease;
            display: none;
            position: fixed;
            right: 20px;
            bottom: 150px;
            z-index: 1000;
        }

        .back-to-top.show {
            display: block;
        }

        .qrcode-modal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: var(--hover-shadow);
            z-index: 1001;
            text-align: center;
        }

        .qrcode-modal img {
            width: 200px;
            height: 200px;
            margin-bottom: 1rem;
            border-radius: 8px;
        }

        .close-btn {
            display: block;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #eee;
            text-align: center;
            line-height: 30px;
            margin: 0 auto;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .close-btn:hover {
            background: #ddd;
            transform: rotate(90deg);
        }

        .contact-section {
            background: var(--surface);
            padding: 2rem;
            text-align: center;
            margin-top: 2rem;
            box-shadow: 0 6px 12px 1px #232323;
            border-radius: 15px;
        }

        .contact-section h3 {
            color: var(--primary);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }

        .contact-section a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .contact-section a:hover {
            color: #0056b3;
        }

        .tips-section {
            margin-top: 2rem;
            padding: 2rem;
            background: var(--surface);
            border-radius: 16px;
            box-shadow: 0 6px 12px 1px #232323;
        }

        .tips-section h3 {
            color: var(--primary);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }

        .tips-list {
            list-style: none;
            padding-left: 1rem;
        }

        .tip-item {
            padding: 1rem;
            margin-bottom: 0.8rem;
            background: #f8f9fa;
            border-radius: 8px;
            font-size: 0.9rem;
            position: relative;
            padding-left: 2.5rem;
        }

        .tip-item::before {
            content: "✨";
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
        }

        .footer {
            text-align: center;
            margin-top: 3rem;
            padding: 2rem;
            color: var(--primary);
            opacity: 0.8;
            border-top: 1px solid #eee;
        }