/* 全局样式 */
        :root {
            --primary: #3B82F6;
            --secondary: #10B981;
            --warning: #F59E0B;
            --dark: #1E293B;
            --light: #F8FAFC;
            --gray: #4B5563;
            --gray-light: #E5E7EB;
            --gray-ultralight: #F3F4F6;
        }

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

        body {
            background: linear-gradient(to bottom right, var(--light), #E0F2FE);
            min-height: 100vh;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: var(--dark);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hidden {
            display: none !important;
        }

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

        .animate-fadeIn {
            animation: fadeIn 0.5s ease-out forwards;
        }

        .animate-pulse {
            animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        /* 弹窗样式 */
        #updateModal {
            position: fixed;
            inset: 0;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1rem;
            background-color: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            transition: opacity 0.3s ease;
        }

        .modal-content {
            background-color: white;
            border-radius: 1rem;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            padding: 2rem;
            max-width: 30rem;
            width: 100%;
            transform: scale(0.95);
            transition: transform 0.3s ease;
        }

        #updateModal:not(.hidden) .modal-content {
            transform: scale(1);
        }

        .modal-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: bold;
            color: red;
            margin-bottom: 1rem;
        }

        .modal-message {
            color: var(--gray);
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }

        .modal-button {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: 9999px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto;
            cursor: pointer;
            transition: all 0.2s ease;
            border: none;
        }

        .modal-button:hover {
            background-color: #2563EB;
            transform: translateY(-1px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

        /* 主内容样式 */
        .main-container {
            max-width: 48rem;
            width: 100%;
            background-color: white;
            border-radius: 1.5rem;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(to right, var(--primary), #2563EB);
            padding: 2rem;
            text-align: center;
            color: white;
        }

        .header-title {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: bold;
            margin-bottom: 1rem;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .header-message {
            color: #ffffff;
            font-size: clamp(1rem, 2vw, 1.25rem);
            max-width: 32rem;
            margin: 0 auto;
        }

        .content {
            padding: 2rem;
        }

        /* 顶部倒计时样式 */
        .header-countdown {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: rgba(255, 255, 255, 0.2);
            border-radius: 9999px;
            padding: 0.75rem 1.5rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
            animation: pulse 2s infinite;
        }

        .header-countdown-icon {
            margin-right: 0.75rem;
            font-size: 1.5rem;
            animation: spin 2s linear infinite;
        }

        .header-countdown-text {
            font-size: 1.25rem;
            margin-right: 0.25rem;
        }

        .header-countdown-value {
		    color: #e2ff04;
            font-size: 1.5rem;
            font-weight: bold;
            min-width: 2rem;
            text-align: center;
        }

        .header-countdown-postfix {
            font-size: 1.25rem;
            margin-left: 0.25rem;
        }

        .url-container {
            margin-bottom: 1.5rem;
        }

        .url-label {
            display: block;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--gray);
            margin-bottom: 0.5rem;
        }

        .url-input {
            width: 100%;
            padding: 0.75rem 1rem;
            background-color: var(--gray-ultralight);
            border: 1px solid var(--gray-light);
            border-radius: 0.5rem;
            color: var(--dark);
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .url-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
        }

        .copy-status {
            position: absolute;
            right: 3rem;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--secondary);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .copy-status.visible {
            opacity: 1;
        }

        .buttons-container {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        @media (min-width: 640px) {
            .buttons-container {
                flex-direction: row;
            }
        }

        .copy-btn, .jump-btn {
		    font-size: 16px;
            flex: 1;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s ease;
            border: 1px solid var(--gray-light);
            background-color: white;
            color: var(--dark);
        }

        .copy-btn:hover {
            background-color: var(--gray-ultralight);
        }

        .jump-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
        }

        .jump-btn:hover {
            background-color: #059669;
        }

        .btn-icon {
            margin-right: 0.5rem;
            transition: transform 0.2s ease;
        }

        .jump-btn:hover .btn-icon {
            transform: translateX(2px);
        }

        .footer {
            margin-top: 2rem;
            text-align: center;
            color: var(--gray);
            font-size: 0.875rem;
        }

        .footer p + p {
            margin-top: 0.25rem;
        }