:root {
            --primary: #ff4d4f;
            --primary-hover: #e63939;
            --accent: #ffd700;
            --text-dark: #1a1a1a;
            --text-light: #333333;
            --bg-white: #ffffff;
            --bg-light: #f8f9fa;
            --border: #e5e5e5;
            --shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background: var(--bg-white);
            color: var(--text-dark);
            line-height: 1.7;
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid var(--border);
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
        }
        .logo { font-size: 28px; font-weight: 700; color: var(--primary); letter-spacing: -1px; }
        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-right { display: flex; align-items: center; gap: 16px; }
        .btn { padding: 10px 24px; border-radius: 50px; text-decoration: none; font-weight: 600; transition: all 0.3s; }
        .btn-primary {
            background: var(--primary);
            color: white;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }
        .hero {
            min-height: 100vh;
            background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 4.2rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--text-dark);
        }
        .hero p {
            font-size: 1.35rem;
            color: var(--text-light);
            margin-bottom: 40px;
        }
        .hero-btns {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .card {
            background: white;
            border-radius: 20px;
            box-shadow: var(--shadow);
            padding: 32px;
            transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.4s;
        }
        .card:hover {
            transform: translateY(-12px);
            box-shadow: 0 25px 50px -12px rgb(255 77 79 / 0.25);
        }
        .section {
            padding: 100px 0;
        }
        .section-title {
            font-size: 2.4rem;
            text-align: center;
            margin-bottom: 60px;
            color: var(--text-dark);
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }
        .table {
            width: 100%;
            border-collapse: collapse;
            margin: 40px 0;
            font-size: 0.95rem;
        }
        .table th, .table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        .table th {
            background: #f8f9fa;
            font-weight: 600;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 0;
            cursor: pointer;
            font-weight: 600;
        }
        .faq-answer {
            display: none;
            padding: 0 0 22px 0;
            color: var(--text-light);
        }
        .faq-answer.open {
            display: block;
        }
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }
        .footer {
            background: #f8f9fa;
            padding: 60px 0 20px;
            border-top: 1px solid var(--border);
        }
        .form-group {
            margin-bottom: 24px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
        }
        .btn-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary);
            color: white;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            box-shadow: 0 10px 30px rgba(255,77,79,0.3);
            z-index: 999;
        }
        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 4px;
            background: var(--primary);
            z-index: 9999;
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-right { gap: 12px; }
        }