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

        body {
            font-family: 'Inter', sans-serif;
            background: #05070f;
            color: #f0f3fa;
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* 高科技动态背景 */
        .bg-glow {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2;
            background: radial-gradient(circle at 20% 30%, rgba(10, 20, 40, 0.9), #03050b);
        }

        .bg-glow::before {
            content: "";
            position: absolute;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(68, 160, 255, 0.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(68, 160, 255, 0.08) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .bg-glow::after {
            content: "";
            position: absolute;
            top: -30%;
            left: -20%;
            width: 140%;
            height: 140%;
            background: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
            filter: blur(80px);
            animation: pulseGlow 12s infinite alternate;
        }

        @keyframes pulseGlow {
            0% { opacity: 0.4; transform: scale(1);}
            100% { opacity: 1; transform: scale(1.2);}
        }

        /* 容器与布局 */
        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding: 24px 0 16px;
            border-bottom: 1px solid rgba(72, 187, 255, 0.2);
            backdrop-filter: blur(4px);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #FFF, #3b82f6, #a855f7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .logo i {
            font-size: 2rem;
            background: none;
            -webkit-background-clip: unset;
            background-clip: unset;
            color: #3b82f6;
            text-shadow: 0 0 8px #3b82f680;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .nav-links a {
            text-decoration: none;
            color: #ccd6f6;
            font-weight: 500;
            transition: 0.2s;
            font-size: 1rem;
            letter-spacing: 0.3px;
            position: relative;
            cursor: pointer;
        }

        .nav-links a:hover, .nav-links a.active {
            color: #3b82f6;
            text-shadow: 0 0 5px rgba(59,130,246,0.5);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, #3b82f6, #a855f7);
            border-radius: 4px;
        }

        /* 按钮风格 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: 0.25s ease;
            cursor: pointer;
            border: none;
            background: rgba(20, 30, 55, 0.6);
            backdrop-filter: blur(8px);
            color: white;
            text-decoration: none;
        }

        .btn-primary {
            background: linear-gradient(95deg, #0f2b5c, #1e3a8a);
            border: 1px solid rgba(59,130,246,0.5);
            box-shadow: 0 4px 14px rgba(59,130,246,0.2);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            background: linear-gradient(95deg, #1e3a8a, #2563eb);
            box-shadow: 0 8px 20px rgba(59,130,246,0.4);
            border-color: #3b82f6;
        }

        .btn-outline {
            border: 1px solid #3b82f6;
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(59,130,246,0.15);
            transform: translateY(-2px);
        }

        /* 卡片通用 */
        .card {
            background: rgba(12, 20, 35, 0.6);
            backdrop-filter: blur(12px);
            border-radius: 28px;
            border: 1px solid rgba(59, 130, 246, 0.2);
            padding: 28px 24px;
            transition: all 0.3s;
        }

        .card:hover {
            border-color: rgba(59, 130, 246, 0.6);
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.5);
        }

        /* 页面视图切换 */
        .page-view {
            display: none;
            animation: fadeIn 0.4s ease;
        }
        .page-view.active-page {
            display: block;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(8px);}
            to { opacity: 1; transform: translateY(0);}
        }

        /* 首页特有 */
        .hero {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 60px 0 40px;
            gap: 40px;
        }

        .hero-content {
            flex: 1.2;
        }

        .hero-badge {
            background: rgba(59,130,246,0.2);
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            border: 1px solid #3b82f660;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #FFFFFF, #60a5fa, #c084fc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: #b9c7e0;
            max-width: 550px;
            margin-bottom: 32px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 20px;
        }

        .stat-item h3 {
            font-size: 2rem;
            font-weight: 700;
            color: #3b82f6;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin: 60px 0;
        }

        .feature-icon {
            font-size: 2.2rem;
            background: linear-gradient(145deg, #1e2a4a, #0f172a);
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 20px;
            margin-bottom: 20px;
            color: #3b82f6;
        }

        .feature-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* 表单通用 */
        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #e2e8ff;
        }

        input, select {
            width: 100%;
            padding: 14px 18px;
            background: rgba(10, 18, 30, 0.8);
            border: 1px solid #2d3a5e;
            border-radius: 24px;
            color: white;
            font-size: 1rem;
            transition: 0.2s;
        }

        input:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59,130,246,0.3);
        }

        .result-area {
            margin-top: 28px;
            background: #0a1022cc;
            border-radius: 24px;
            padding: 20px;
            text-align: center;
            border: 1px dashed #3b82f6;
        }
        .price-badge {
            font-size: 1.8rem;
            font-weight: 700;
            color: #60a5fa;
        }
        .plan-card {
            background: rgba(0, 20, 45, 0.6);
            border-radius: 28px;
            padding: 18px;
            text-align: center;
            transition: 0.2s;
            cursor: pointer;
            border: 1px solid rgba(59,130,246,0.3);
        }
        .plan-card.selected {
            border-color: #3b82f6;
            background: rgba(59,130,246,0.15);
            box-shadow: 0 0 12px rgba(59,130,246,0.3);
        }
        .plan-card h4 {
            font-size: 1.4rem;
        }
        footer {
            border-top: 1px solid rgba(59,130,246,0.2);
            margin-top: 80px;
            padding: 30px 0 40px;
            text-align: center;
            color: #8a99b9;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .navbar { flex-direction: column; gap: 16px; }
            .hero-title { font-size: 2.3rem; }
            .hero-stats { flex-wrap: wrap; }
        }
        .toast-msg {
            position: fixed;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            background: #0e1a2fcc;
            backdrop-filter: blur(12px);
            padding: 12px 28px;
            border-radius: 60px;
            border: 1px solid #3b82f6;
            color: white;
            z-index: 999;
            font-weight: 500;
            pointer-events: none;
            transition: 0.2s;
        }