* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f5f7fa;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        
        ul, ol {
            list-style: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        .btn {
            display: inline-block;
            padding: 14px 36px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
            color: white;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            text-align: center;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(44, 128, 255, 0.3);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(44, 128, 255, 0.4);
        }
        
        .btn-primary {
            background: linear-gradient(to right, #ff4b2b, #ff416c);
            box-shadow: 0 4px 12px rgba(255, 75, 43, 0.3);
        }
        
        .btn-primary:hover {
            box-shadow: 0 6px 18px rgba(255, 75, 43, 0.4);
        }
        
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            color: #1a2b5e;
            font-size: 2.5rem;
            position: relative;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 100px;
            height: 4px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
            margin: 20px auto 0;
            border-radius: 2px;
        }
        
        header {
            background-color: white;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 20px;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #2c80ff;
        }
        
        .logo span {
            color: #ff4b2b;
        }
        
        .nav-links {
            display: flex;
            gap: 40px;
        }
        
        .nav-links a {
            font-weight: 600;
            color: #444;
            position: relative;
        }
        
        .nav-links a:hover {
            color: #2c80ff;
        }
        
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
            transition: width 0.3s;
        }
        
        .nav-links a:hover:after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #2c80ff;
        }
        
        .banner {
            background: linear-gradient(rgba(26, 43, 94, 0.9), rgba(26, 43, 94, 0.9)), 
                        url('https://images.unsplash.com/photo-1558655146-364e1d5d6e8f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 140px 0;
            text-align: center;
        }
        
        .banner-content {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .banner h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        
        .banner p {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .package-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 40px;
            margin-top: 30px;
        }
        
        .package-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.4s, box-shadow 0.4s;
        }
        
        .package-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }
        
        .package-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #ff4b2b;
            color: white;
            padding: 6px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
        }
        
        .package-img {
            /*height: 220px;*/
            overflow: hidden;
            position: relative;
        }
        
        .package-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .package-card:hover .package-img img {
            transform: scale(1.05);
        }
        
        .package-content {
            padding: 30px;
        }
        
        .package-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #1a2b5e;
        }
        
        .package-features {
            margin-bottom: 25px;
        }
        
        .package-features li {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            justify-content: space-between;
        }
        
        .package-features li:last-child {
            border-bottom: none;
        }
        
        .package-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: #2c80ff;
            margin-bottom: 25px;
        }
        
        .package-price span {
            font-size: 1rem;
            color: #888;
            font-weight: normal;
        }
        
        .process-steps {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-top: 50px;
        }
        
        .step {
            flex: 1;
            min-width: 220px;
            text-align: center;
            padding: 0 20px;
            margin-bottom: 40px;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            font-weight: 800;
            margin: 0 auto 25px;
            box-shadow: 0 8px 20px rgba(44, 128, 255, 0.3);
        }
        
        .step-title {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #1a2b5e;
        }
        
        .coverage-content {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 50px;
        }
        
        .coverage-text {
            flex: 1;
            min-width: 300px;
        }
        
        .coverage-map {
            flex: 1;
            min-width: 300px;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .coverage-list {
            margin-top: 30px;
        }
        
        .coverage-list li {
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
        }
        
        .coverage-list li:before {
            content: '✓';
            display: inline-block;
            width: 24px;
            height: 24px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
            color: white;
            border-radius: 50%;
            text-align: center;
            line-height: 24px;
            margin-right: 15px;
            font-size: 0.9rem;
        }
        
        .tutorial-steps, .tips-list, .faq-list, .review-tips-list {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .tutorial-step, .tip-item, .faq-item, .review-tip {
            padding: 30px;
            margin-bottom: 25px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            border-left: 5px solid #2c80ff;
        }
        
        .faq-question {
            font-weight: 700;
            color: #1a2b5e;
            margin-bottom: 15px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.1rem;
        }
        
        .faq-answer {
            display: none;
            padding-top: 15px;
            color: #555;
            line-height: 1.8;
        }
        
        footer {
            background: linear-gradient(to right, #1a2b5e, #2c3e6e);
            color: white;
            padding: 80px 0 40px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 50px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 250px;
            margin-bottom: 40px;
        }
        
        .footer-title {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: #fff;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: linear-gradient(to right, #2c80ff, #1a5dc1);
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #bbb;
        }
        
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        
        @media (max-width: 992px) {
            .section-title {
                font-size: 2.2rem;
            }
            
            .banner h1 {
                font-size: 2.7rem;
            }
            
            .banner p {
                font-size: 1.2rem;
            }
            
            .process-steps {
                flex-direction: column;
                align-items: center;
            }
            
            .package-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                z-index: 1000;
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 10px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .banner {
                padding: 100px 0;
            }
            
            .banner h1 {
                font-size: 2.2rem;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .coverage-content {
                flex-direction: column;
            }
            
            .footer-column {
                flex: 100%;
            }
        }
        
        @media (max-width: 480px) {
            .banner h1 {
                font-size: 1.8rem;
            }
            
            .package-grid {
                grid-template-columns: 1fr;
            }
            
            .step {
                min-width: 100%;
            }
        }