:root {
            --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
            --card-bg: rgba(255, 255, 255, 0.03);
            --card-border: rgba(255, 255, 255, 0.08);
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --accent-color: #6366f1;
            --accent-glow: rgba(99, 102, 241, 0.4);
            --btn-gradient: linear-gradient(90deg, #4f46e5, #7c3aed);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background: var(--bg-gradient);
            color: var(--text-primary);
            min-height: 100vh;
            /* 适配移动端动态视口高度 */
            min-height: 100dvh; 
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            overflow: hidden;
        }

        /* 背景动态光斑 */
        .bg-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.4;
            animation: float 10s infinite ease-in-out;
        }
        .orb-1 { width: 300px; height: 300px; background: #4f46e5; top: -10%; left: -10%; }
        .orb-2 { width: 250px; height: 250px; background: #ec4899; bottom: -5%; right: -5%; animation-delay: -5s; }

        .container {
            width: 100%;
            max-width: 480px; /* 限制最大宽度，更像App卡片 */
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--card-border);
            border-radius: 24px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .header-poem {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            letter-spacing: 2px;
            opacity: 0.8;
            font-weight: 500;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(99, 102, 241, 0.1);
            color: #818cf8;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(99, 102, 241, 0.2);
        }

        .spinner {
            width: 14px;
            height: 14px;
            border: 2px solid #818cf8;
            border-top-color: transparent;
            border-radius: 50%;
            margin-right: 8px;
            animation: spin 1s linear infinite;
        }

        h1 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            background: linear-gradient(to right, #fff, #c7d2fe);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .description {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 30px;
        }

        .countdown-wrap {
            position: relative;
            display: flex;
            justify-content: center;
            margin-bottom: 30px;
        }

        .countdown-number {
            font-size: 72px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.5) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-variant-numeric: tabular-nums;
            letter-spacing: -2px;
        }

        .domain-card {
            background: rgba(0, 0, 0, 0.2);
            border-radius: 12px;
            padding: 16px;
            margin-bottom: 30px;
            border: 1px solid rgba(255,255,255,0.05);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .domain-label {
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .domain-text {
            font-family: 'SF Mono', 'Roboto Mono', monospace;
            color: #67e8f9;
            font-size: 18px;
            word-break: break-all;
        }

        /* 进度条 */
        .progress-container {
            height: 4px;
            background: rgba(255,255,255,0.1);
            border-radius: 2px;
            margin: 0 auto 30px auto;
            width: 100%;
            overflow: hidden;
            position: relative;
        }

        .progress-bar {
            height: 100%;
            width: 0;
            background: var(--btn-gradient);
            border-radius: 2px;
            transition: width 3s linear;
            box-shadow: 0 0 10px var(--accent-glow);
        }

        .btn-primary {
            width: 100%;
            padding: 16px;
            border: none;
            border-radius: 14px;
            background: var(--btn-gradient);
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 20px rgba(79, 70, 229, 0.4);
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 2px 10px rgba(79, 70, 229, 0.3);
        }

        /* 按钮光效扫过动画 */
        .btn-primary::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            animation: shimmer 3s infinite;
        }

        .footer-hint {
            margin-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }

        @keyframes spin { 100% { transform: rotate(360deg); } }
        @keyframes float { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(20px, -20px); } }
        @keyframes shimmer { 0% { left: -100%; } 20% { left: 100%; } 100% { left: 100%; } }
        @keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

        /* 移动端特别优化 */
        @media (max-width: 480px) {
            .container {
                padding: 30px 20px;
                border: none; /* 移动端可以去掉边框让背景融合 */
                background: rgba(255, 255, 255, 0.05);
            }
            .countdown-number { font-size: 64px; }
            h1 { font-size: 24px; }
            .domain-text { font-size: 16px; }
        }