* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            --primary: #2c5aa0;
            --primary-dark: #1a3a6e;
            --accent: #ff9800;
            --light: #f5f7fa;
            --dark: #333;
            --text: #444;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
        }

        body {
            color: var(--text);
            line-height: 1.6;
            background: #f9f9f9;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(0,0,0,0.65), rgba(0,0,0,0.65)), 
                        url('https://images.unsplash.com/photo-1530549387789-4c1017266635?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
            background-size: cover;
            background-position: center 30%;
            padding: 100px 0;
            text-align: center;
            color: white;
        }
        <!-- 替换图片URL: wild-swimming-hero.jpg -->

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .hero .tagline {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 30px;
            opacity: 0.95;
        }

        .btn-primary {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 14px 35px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            transition: 0.3s;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }

        .btn-primary:hover {
            background: #e68900;
            transform: translateY(-3px);
        }

        /* Section General */
        section {
            padding: 70px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title h2 {
            font-size: 2.3rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .section-title p {
            max-width: 700px;
            margin: 0 auto;
            color: #666;
            font-size: 1.05rem;
        }

        /* Features Grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 20px;
        }

        .feature-card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-img {
            width: 100%;
            aspect-ratio: 1 / 1;
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 20px;
            background-color: #f0f0f0;
        }

        .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-card h3 {
            color: var(--primary);
            margin-bottom: 12px;
            font-size: 1.3rem;
        }

        /* Product Showcase */
        .product-showcase {
            background: white;
        }

        .showcase-layout {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }

        .showcase-image {
            flex: 1;
            min-width: 280px;
            background: #f0f0f0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .showcase-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        .showcase-content {
            flex: 1;
        }

        .showcase-content h3 {
            color: var(--primary);
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .spec-list {
            list-style: none;
            margin: 20px 0;
        }

        .spec-list li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .spec-list li::before {
            content: "✓";
            color: var(--accent);
            font-weight: bold;
            font-size: 1.2rem;
        }

        /* Why Wild Swimming */
        .why-wild {
            background: var(--light);
        }

        .reasons-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .reason-item {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }

        .reason-item h4 {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            text-align: center;
            padding: 70px 0;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
        }

        .cta-section p {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 25px;
        }

        .btn-cta {
            background: var(--accent);
            color: white;
            padding: 14px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            display: inline-block;
            transition: 0.3s;
        }

        .btn-cta:hover {
            background: #e68900;
            transform: translateY(-3px);
        }

        /* Footer */
        .footer {
            background: var(--dark);
            color: white;
            padding: 30px 0;
            text-align: center;
        }

        .footer p {
            font-size: 0.85rem;
            color: #aaa;
        }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2rem; }
            .features-grid, .reasons-grid { grid-template-columns: 1fr; }
            .showcase-layout { flex-direction: column; }
            .section-title h2 { font-size: 1.8rem; }
        }