:root {
            --primary-color: #2a5caa;
            --secondary-color: #f8b500;
            --dark-color: #1a365d;
            --light-color: #f8f9fa;
            --success-color: #28a745;
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
        }
        .btn-primary:hover {
            background-color: var(--dark-color);
            border-color: var(--dark-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: #333;
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
        }
        .btn-secondary:hover {
            background-color: #e0a500;
            border-color: #e0a500;
            color: #333;
            transform: translateY(-3px);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark-color) !important;
            margin: 0 0.5rem;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            left: 0;
            bottom: 0;
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(42, 92, 170, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1544620347-c4fd4a3d5957?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2069&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            margin-top: 76px;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            color: white;
            margin-bottom: 1.5rem;
        }
        .hero-section p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .icon-box {
            background: white;
            padding: 2.5rem 1.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            text-align: center;
            height: 100%;
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .icon-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }
        .icon-box i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: rgba(42, 92, 170, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
        }
        .feature-icon i {
            font-size: 2.5rem;
            color: var(--primary-color);
        }
        .coach-card {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: var(--transition);
            background: white;
        }
        .coach-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }
        .coach-img {
            height: 280px;
            object-fit: cover;
            width: 100%;
        }
        .coach-info {
            padding: 1.5rem;
        }
        .coach-rating {
            color: var(--secondary-color);
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 2rem;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 1.5rem;
            position: relative;
            z-index: 2;
        }
        .process-step::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 3px;
            background: var(--primary-color);
            top: 90px;
            left: 50%;
            z-index: 1;
        }
        .process-step:last-child::before {
            display: none;
        }
        .price-card {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: var(--transition);
            background: white;
            text-align: center;
            border: 2px solid transparent;
        }
        .price-card:hover {
            transform: translateY(-10px);
            border-color: var(--secondary-color);
        }
        .price-header {
            background: var(--primary-color);
            color: white;
            padding: 2rem;
        }
        .price-body {
            padding: 2rem;
        }
        .price {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .price-unit {
            font-size: 1rem;
            color: #666;
        }
        .contact-info-box {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            text-align: center;
            height: 100%;
            border-left: 5px solid var(--primary-color);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 4rem 0 2rem;
        }
        footer a {
            color: #ddd;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid rgba(248, 181, 0, 0.3);
            display: inline-block;
        }
        .friendlink {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 0.5rem 1rem;
            border-radius: 5px;
            margin: 0.3rem;
            color: #ddd;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .friendlink:hover {
            background: rgba(248, 181, 0, 0.2);
            color: white;
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 1.5rem 0;
            margin-top: 3rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: #333;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .process-step::before {
                display: none;
            }
            .navbar-collapse {
                background: white;
                padding: 1rem;
                border-radius: 10px;
                margin-top: 1rem;
                box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            }
        }