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

    body {
        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
        background-color: #f5f5f5;
        color: #333;
    }

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

    .header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 30px;
        border-radius: 10px;
        margin-bottom: 30px;
        text-align: center;
        position: relative;
    }

    .header h1 {
        font-size: 2.5rem;
        margin-bottom: 10px;
    }

    .header p {
        font-size: 1.1rem;
        opacity: 0.9;
        margin-bottom: 20px;
    }

    .header-actions {
        position: absolute;
        top: 20px;
        right: 20px;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .logout-btn {
        background: rgba(255, 255, 255, 0.15);
        border: 2px solid rgba(255, 255, 255, 0.3);
        color: white;
        padding: 8px 16px;
        border-radius: 25px;
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
        backdrop-filter: blur(10px);
    }

    .logout-btn:hover {
        background: rgba(255, 255, 255, 0.25);
        border-color: rgba(255, 255, 255, 0.5);
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    .header-action-btn {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: white;
        padding: 8px 14px;
        border-radius: 20px;
        font-size: 13px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
        backdrop-filter: blur(5px);
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .header-action-btn:hover {
        background: rgba(255, 255, 255, 0.2);
        border-color: rgba(255, 255, 255, 0.4);
        transform: translateY(-1px);
    }

    .section-action-btn {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border: none;
        color: white;
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 13px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        gap: 6px;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    }

    .section-action-btn:hover {
        background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    }

    .add-section {
        background: white;
        padding: 25px;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        margin-bottom: 30px;
    }

    .add-section h2 {
        margin-bottom: 20px;
        color: #333;
    }

    .form-group {
        margin-bottom: 15px;
    }

    .form-group label {
        display: block;
        margin-bottom: 5px;
        font-weight: 500;
        color: #555;
    }

    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 12px;
        border: 2px solid #e1e1e1;
        border-radius: 5px;
        font-size: 14px;
        transition: border-color 0.3s;
    }

    .form-group input:focus,
    .form-group textarea:focus {
        outline: none;
        border-color: #667eea;
    }

    .form-group textarea {
        height: 80px;
        resize: vertical;
    }

    .btn {
        padding: 12px 25px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        font-size: 14px;
        font-weight: 500;
        transition: all 0.3s;
        text-decoration: none;
        display: inline-block;
        text-align: center;
    }

    .btn-primary {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    }

    .btn-success {
        background: #28a745;
        color: white;
    }

    .btn-warning {
        background: #ffc107;
        color: #212529;
    }

    .btn-danger {
        background: #dc3545;
        color: white;
    }

    .btn-sm {
        padding: 6px 12px;
        font-size: 12px;
        margin: 0 2px;
    }

    .subscriptions-section {
        background: white;
        padding: 25px;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .section-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 20px;
    }

    .subscriptions-section h2 {
        margin: 0;
        color: #333;
    }

    #subscriptionsList {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .subscription-item {
        border: 1px solid #f0f0f0;
        border-radius: 10px;
        margin-bottom: 0;
        padding: 12px;
        background: white;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        position: relative;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        height: 100%;
    }

    .subscription-item::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .subscription-item:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    }

    .subscription-item:hover::before {
        opacity: 1;
    }

    .subscription-item.inactive {
        opacity: 0.6;
        background: #f5f5f5;
        border-color: #e0e0e0;
        filter: grayscale(100%);
    }

    .subscription-item.inactive:hover {
        transform: none;
        box-shadow: none;
    }

    .subscription-item.inactive::before {
        background: #ccc;
        display: none;
    }

    .subscription-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 8px;
        padding-bottom: 8px;
        border-bottom: 1px solid #f0f0f0;
    }

    .subscription-name {
        font-size: 1rem;
        font-weight: 700;
        color: #2d3748;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .subscription-status {
        padding: 2px 8px;
        border-radius: 30px;
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .status-active {
        background: #c6f6d5;
        color: #2f855a;
    }

    .status-active::before {
        content: "●";
        color: #38a169;
    }

    .status-inactive {
        background: #fed7d7;
        color: #9b2c2c;
    }

    .status-inactive::before {
        content: "○";
        color: #e53e3e;
    }

    .subscription-url {
        color: #4a5568;
        word-break: break-all;
        margin: 8px 0;
        font-family: "SF Mono", "Cascadia Code", "Fira Code", monospace;
        background: #f7fafc;
        padding: 6px;
        border-radius: 4px;
        font-size: 0.8rem;
        border: 1px dashed #e2e8f0;
    }

    .subscription-description {
        color: #718096;
        margin: 6px 0;
        line-height: 1.4;
        font-size: 0.85rem;
    }

    .subscription-meta {
        display: flex;
        flex-direction: column;
        gap: 8px;
        font-size: 0.8rem;
        color: #718096;
        margin: 8px 0;
        padding-top: 8px;
        border-top: 1px solid #f0f0f0;
    }

    .subscription-meta-row {
        display: flex;
        align-items: center;
        gap: 20px;
    }

    .subscription-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .subscription-meta span::before {
        font-size: 1.1rem;
    }

    .meta-traffic {
        flex: 1;
    }

    .meta-expire {
        margin-left: auto;
        text-align: right;
    }

    .usage-bar {
        display: flex;
        height: 8px;
        width: 100%;
        border-radius: 4px;
        overflow: hidden;
        background: #e2e8f0;
    }

    .usage-download {
        height: 100%;
        background: linear-gradient(90deg, #4f86ff 0%, #3b6ef0 100%);
    }

    .usage-upload {
        height: 100%;
        background: linear-gradient(90deg, #38c172 0%, #2fb86a 100%);
    }

    .usage-icon {
        display: inline-block;
        margin-left: 8px;
        font-size: 1rem;
        vertical-align: middle;
        opacity: 0.9;
    }

    .subscription-actions {
        display: flex;
        justify-content: flex-end;
        gap: 6px;
        margin-top: auto;
        padding-top: 8px;
        opacity: 0.8;
        transition: opacity 0.3s ease;
    }

    .subscription-item:hover .subscription-actions {
        opacity: 1;
    }

    .loading {
        text-align: center;
        padding: 40px;
        color: #666;
    }

    .message {
        padding: 15px;
        border-radius: 5px;
        margin-bottom: 20px;
        font-weight: 500;
    }

    .message.success {
        background: #d4edda;
        color: #155724;
        border: 1px solid #c3e6cb;
    }

    .message.error {
        background: #f8d7da;
        color: #721c24;
        border: 1px solid #f5c6cb;
    }

    .stats {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
        margin-bottom: 30px;
    }

    .stat-card {
        background: white;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        text-align: center;
    }

    .stat-number {
        font-size: 2rem;
        font-weight: 700;
        color: #667eea;
    }

    .stat-label {
        color: #666;
        margin-top: 5px;
    }

    @media (max-width: 1200px) {
        #subscriptionsList {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 768px) {
        #subscriptionsList {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 768px) {
        .container {
            padding: 10px;
        }

        .header {
            padding: 20px 15px;
        }

        .header h1 {
            font-size: 1.8rem;
        }

        .header-actions {
            position: static;
            flex-direction: row;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }

        .header-action-btn {
            font-size: 12px;
            padding: 8px 14px;
            flex: 1;
            min-width: 120px;
            max-width: 140px;
            justify-content: center;
        }

        .logout-btn {
            padding: 8px 14px;
            font-size: 12px;
            flex: 1;
            min-width: 80px;
            max-width: 100px;
        }

        .action-buttons {
            flex-direction: column;
            gap: 15px;
            margin: 20px 0;
        }

        .action-btn {
            min-width: auto;
            width: 100%;
            padding: 16px 20px;
        }

        .subscription-header {
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
        }

        .subscription-actions {
            text-align: left;
            width: 100%;
        }

        .modal-content {
            margin: 10% auto;
            width: 95%;
        }

        .stats {
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .section-header {
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
        }

        .section-action-btn {
            align-self: stretch;
            justify-content: center;
        }
    }

    /* =========================== 超小屏幕优化 =========================== */
    @media (max-width: 480px) {
        .header-actions {
            flex-direction: column;
            gap: 8px;
        }

        .header-action-btn,
        .logout-btn {
            flex: none;
            min-width: auto;
            max-width: none;
            width: 100%;
            justify-content: center;
        }

        .header h1 {
            font-size: 1.5rem;
        }

        .header p {
            font-size: 0.9rem;
        }
    }

    /* =========================== 模态框样式 =========================== */
    .modal {
        display: none;
        position: fixed;
        z-index: 1000;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(5px);
    }

    .modal-content {
        background-color: #fff;
        margin: 5% auto;
        padding: 0;
        border-radius: 15px;
        width: 90%;
        max-width: 600px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        animation: modalSlideIn 0.3s ease-out;
    }

    @keyframes modalSlideIn {
        from {
            opacity: 0;
            transform: translateY(-50px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .modal-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 20px 25px;
        border-radius: 15px 15px 0 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .modal-title {
        margin: 0;
        font-size: 1.4rem;
        font-weight: 600;
    }

    .close {
        color: white;
        font-size: 28px;
        font-weight: bold;
        cursor: pointer;
        background: none;
        border: none;
        padding: 0;
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        transition: background-color 0.3s;
    }

    .close:hover {
        background-color: rgba(255, 255, 255, 0.2);
    }

    .modal-body {
        padding: 25px;
    }

    .modal-form .form-group {
        margin-bottom: 20px;
    }

    .modal-form .form-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: 500;
        color: #333;
    }

    .modal-form .form-group input,
    .modal-form .form-group textarea {
        width: 100%;
        padding: 12px 15px;
        border: 2px solid #e1e1e1;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 500;
        color: #333;
        background-color: #fff;
        background-image: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.03) 100%);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-sizing: border-box;
    }

    .modal-form .form-group input:hover,
    .modal-form .form-group textarea:hover {
        border-color: #667eea;
        background-color: #faf9ff;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
    }

    .modal-form .form-group input:focus,
    .modal-form .form-group textarea:focus {
        outline: none;
        border-color: #667eea;
        background-color: #faf9ff;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15), 0 2px 12px rgba(102, 126, 234, 0.2);
    }

    .modal-form .form-group textarea {
        height: 80px;
        resize: vertical;
    }

    /* 自定义 select 下拉框样式 */
    .modal-form .form-group select {
        width: 100%;
        padding: 12px 40px 12px 15px;
        border: 2px solid #e1e1e1;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 500;
        color: #333;
        background-color: #fff;
        background-image: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.03) 100%);
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-sizing: border-box;
        appearance: none;
        -webkit-appearance: none;
        -moz-appearance: none;
        /* 自定义箭头图标 */
        background-repeat: no-repeat;
        background-position: right 12px center;
        background-size: 20px;
        background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%23667eea" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    }

    .modal-form .form-group select:hover {
        border-color: #667eea;
        background-color: #faf9ff;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
    }

    .modal-form .form-group select:focus {
        outline: none;
        border-color: #667eea;
        background-color: #faf9ff;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15), 0 2px 12px rgba(102, 126, 234, 0.2);
    }

    /* select option 样式 */
    .modal-form .form-group select option {
        padding: 12px;
        font-size: 14px;
        font-weight: 500;
        background-color: #fff;
        color: #333;
    }

    .modal-form .form-group select option:hover {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }

    .modal-form .form-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .modal-footer {
        padding: 0 25px 25px 25px;
        display: flex;
        justify-content: flex-end;
        gap: 10px;
    }

    .btn-modal {
        padding: 12px 25px;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        font-size: 14px;
        font-weight: 500;
        transition: all 0.3s;
        text-decoration: none;
        display: inline-block;
        text-align: center;
    }

    .btn-modal-primary {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }

    .btn-modal-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    }

    .btn-modal-secondary {
        background: #f8f9fa;
        color: #6c757d;
        border: 1px solid #dee2e6;
    }

    .btn-modal-secondary:hover {
        background: #e9ecef;
        color: #495057;
    }

    .action-buttons {
        display: none;
        /* 隐藏原来的按钮区域 */
    }

    .action-btn {
        padding: 18px 35px;
        border: none;
        border-radius: 12px;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
        min-width: 180px;
        position: relative;
        overflow: hidden;
    }

    .action-btn::before {
        content: "";
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
        transition: left 0.5s;
    }

    /* =========================== Loading Overlay =========================== */
    .loading-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(255, 255, 255, 0.7);
        backdrop-filter: blur(2px);
        z-index: 9999;
        display: none;
        justify-content: center;
        align-items: center;
        flex-direction: column;
    }

    .loading-overlay.visible {
        display: flex;
    }

    .spinner {
        width: 50px;
        height: 50px;
        border: 4px solid #f3f3f3;
        border-top: 4px solid #667eea;
        border-radius: 50%;
        animation: spin 1s linear infinite;
        margin-bottom: 15px;
    }

    .loading-text {
        color: #667eea;
        font-weight: 500;
        font-size: 1.1rem;
    }

    @keyframes spin {
        0% {
            transform: rotate(0deg);
        }

        100% {
            transform: rotate(360deg);
        }
    }



    .action-btn:hover::before {
        left: 100%;
    }

    .action-btn:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
    }

    .action-btn-config {
        background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
        color: white;
    }

    .action-btn-config:hover {
        background: linear-gradient(135deg, #5a4fcf 0%, #9085e8 100%);
    }

    .action-btn-add {
        background: linear-gradient(135deg, #00cec9 0%, #55efc4 100%);
        color: white;
    }

    .action-btn-add:hover {
        background: linear-gradient(135deg, #00b894 0%, #00a085 100%);
    }

    /* Toast Notification Container */
    .toast-container {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 9999;
        display: flex;
        flex-direction: column;
        gap: 10px;
        pointer-events: none;
    }

    /* Toast Notification */
    .toast {
        background: #fff;
        min-width: 300px;
        max-width: 400px;
        padding: 16px 20px;
        border-radius: 12px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
        display: flex;
        align-items: center;
        gap: 12px;
        transform: translateX(120%);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        pointer-events: auto;
        border-left: 5px solid #ccc;
        font-size: 14px;
        font-weight: 500;
        overflow: hidden;
        margin-bottom: 10px;
    }

    .toast.show {
        transform: translateX(0);
        opacity: 1;
    }

    .toast.success {
        border-left-color: #28a745;
    }

    .toast.success .toast-icon {
        color: #28a745;
        background: #e8f5e9;
    }

    .toast.error {
        border-left-color: #dc3545;
    }

    .toast.error .toast-icon {
        color: #dc3545;
        background: #ffebee;
    }

    .toast.info {
        border-left-color: #17a2b8;
    }

    .toast.info .toast-icon {
        color: #17a2b8;
        background: #e0f7fa;
    }

    .toast-icon {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        font-size: 16px;
    }

    .toast-content {
        flex: 1;
        color: #333;
        line-height: 1.4;
    }

    .toast-close {
        color: #999;
        cursor: pointer;
        font-size: 18px;
        padding: 4px;
        transition: color 0.2s;
        background: none;
        border: none;
        line-height: 1;
    }

    .toast-close:hover {
        color: #333;
    }