* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f8fafc;
            color: #334155;
            line-height: 1.6;
            scroll-behavior: smooth;
        }

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e40af;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}



.nav-link {
    color: #64748b;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-link:hover, 
.nav-link.active {
    background: #3b82f6;
    color: white;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-toggle::after {
    content: "▼";
    font-size: 0.7rem;
    margin-left: 5px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    z-index: 1000;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
    margin-top: 5px;
}

.dropdown:hover .dropdown-menu {
    display: block;
    animation: fadeIn 0.3s ease;
}

.dropdown-item {
    display: block;
    padding: 20px 20px;
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background: #f1f5f9;
    color: #3b82f6;
}

.dropdown-item.active {
    background: #eff6ff;
    color: #3b82f6;
    font-weight: 600;
}
.sub-nav-link {
    color: #64748b;
    text-decoration: none;
    font-weight: 400;
    padding: 5px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.sub-nav-link:hover, 
.sub-nav-link.active {
    background: #3b82f6;
    color: white;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        margin-top: 0;
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .dropdown-toggle::after {
        display: none;
    }
}
/* 页面标题区域样式 */
.page-header {
    background: linear-gradient(rgba(30, 64, 175, 0.85), rgba(59, 130, 246, 0.85)), url('https://images.unsplash.com/photo-1551836022-d5d88e9218df?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 5rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.page-header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.95;
}

/* 响应式设计调整 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    nav ul {
        margin-top: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    nav ul li {
        margin: 0.5rem;
    }
    
    .page-header {
        padding: 3rem 0;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
}

/* 修复导航栏滚动问题 */
header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 10px 0;
}

/* 主内容区域上边距调整 */
main {
    margin-top: 80px;
}

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 导航栏样式 */
        .navbar {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled {
            padding: 10px 0;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1e40af;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 8px;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
        }
        
        .nav-item {
            margin: 0 10px;
        }
        
        .nav-link {
            text-decoration: none;
            color: #64748b;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all 0.3s ease;
        }
        
        .nav-link:hover, .nav-link.active {
            background: #3b82f6;
            color: white;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #3b82f6;
            cursor: pointer;
        }
        
        /* 页面头部样式 */
        .hero {
            background: linear-gradient(135deg, #1e40af, #3b82f6);
            color: white;
            padding: 150px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 60px;
        }
        
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,208C1248,224,1344,192,1392,176L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
            background-size: cover;
            background-position: bottom;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
        }
        
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 30px;
        }
        
        .btn {
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            text-align: center;
        }
        
        .btn-primary {
            background: white;
            color: #3b82f6;
        }
        
        .btn-primary:hover {
            background: #f8fafc;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }
        
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        /* 服务概览部分 */
        .services-overview {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.2rem;
            color: #1e293b;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #64748b;
            max-width: 600px;
            margin: 0 auto;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .service-item {
            background: white;
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .service-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: white;
        }
        
        .service-icon-1 {
            background: linear-gradient(135deg, #10b981, #34d399);
        }
        
        .service-icon-2 {
            background: linear-gradient(135deg, #3b82f6, #60a5fa);
        }
        
        .service-icon-3 {
            background: linear-gradient(135deg, #8b5cf6, #a78bfa);
        }
        
        .service-item h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: #1e293b;
        }
        
        .service-item p {
            color: #64748b;
            margin-bottom: 20px;
        }
        
        .service-link {
            color: #3b82f6;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        
        .service-link i {
            margin-left: 5px;
            transition: transform 0.3s ease;
        }
        
        .service-link:hover i {
            transform: translateX(5px);
        }
        
        /* FAQ部分 */
        .faq-section {
            padding: 80px 0;
            background: #f1f5f9;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: white;
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: #1e293b;
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: #64748b;
        }
        
        .faq-answer.active {
            padding: 0 20px 20px;
            max-height: 300px;
        }
        
        .faq-toggle {
            transition: transform 0.3s ease;
        }
        
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
        }
        
        .faq-more {
            text-align: center;
            margin-top: 40px;
        }
        
        /* 条款部分 */
        .terms-section {
            padding: 80px 0;
        }
        
        .terms-content {
            background: white;
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        }
        
        .terms-list {
            list-style: none;
            margin-top: 20px;
        }
        
        .terms-list li {
            margin-bottom: 15px;
            padding-left: 30px;
            position: relative;
        }
        
        .terms-list li:before {
            content: "•";
            color: #3b82f6;
            font-weight: bold;
            position: absolute;
            left: 0;
            top: 0;
            font-size: 1.2rem;
        }
        
        /* 下载部分 */
        .downloads-section {
            padding: 80px 0;
            background: #f1f5f9;
        }
        
        .downloads-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }
        
        .download-item {
            background: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
        }
        
        .download-icon {
            color: #3b82f6;
            font-size: 2.5rem;
            margin-bottom: 15px;
        }
        
        .download-item h3 {
            margin-bottom: 10px;
            color: #1e293b;
        }
        
        .download-item p {
            color: #64748b;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        
        .download-btn {
            background: #3b82f6;
            color: white;
            padding: 10px;
            border-radius: 8px;
            text-decoration: none;
            text-align: center;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .download-btn:hover {
            background: #2563eb;
        }
        
        /* 案例部分 */
        .cases-section {
            padding: 80px 0;
        }
        
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .case-item {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .case-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .case-image {
            height: 200px;
            background: linear-gradient(135deg, #1e40af, #3b82f6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }
        
        .case-content {
            padding: 25px;
        }
        
        .case-content h3 {
            margin-bottom: 15px;
            color: #1e293b;
        }
        
        .case-content p {
            color: #64748b;
            margin-bottom: 20px;
        }
        
        .case-link {
            color: #3b82f6;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        
        .case-link i {
            margin-left: 5px;
            transition: transform 0.3s ease;
        }
        
        .case-link:hover i {
            transform: translateX(5px);
        }
        
        /* 页脚样式 */
        footer {
            background: #1e293b;
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-section h3 {
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        
        .contact-info p {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        
        .contact-info i {
            margin-right: 10px;
            width: 20px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #94a3b8;
        }
        
        .copyright a {
            color: #60a5fa;
            text-decoration: none;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                background: white;
                width: 100%;
                flex-direction: column;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                padding: 20px 0;
                transition: all 0.3s ease;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-item {
                margin: 10px 0;
                text-align: center;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero-buttons {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
                margin-bottom: 10px;
            }
        }
/* 服务导航样式 */
.service-nav {
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    margin-bottom: 40px;
    position: sticky;
    top: 80px;
    z-index: 100;
}

.service-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    flex-wrap: wrap;
}

.service-nav li {
    margin: 0 10px;
}

.service-nav a {
    text-decoration: none;
    color: #64748b;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.service-nav a:hover, 
.service-nav a.active {
    background: #3b82f6;
    color: white;
}

/* 服务卡片样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.service-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: 30px 30px 20px;
    position: relative;
    z-index: 1;
}

.card-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: white;
}

.ipv4-rental .card-icon {
    background: linear-gradient(135deg, #10b981, #34d399);
}

.ipv4-sale .card-icon {
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.asn-registration .card-icon {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #1e293b;
}

.card-price {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.ipv4-rental .card-price {
    color: #10b981;
}

.ipv4-sale .card-price {
    color: #3b82f6;
}

.asn-registration .card-price {
    color: #8b5cf6;
}

.card-description {
    color: #64748b;
    margin-bottom: 20px;
}

.card-body {
    padding: 0 30px 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-features {
    margin-bottom: 25px;
}

.card-features h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #1e293b;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
}

.feature-list i {
    margin-right: 10px;
    margin-top: 4px;
    flex-shrink: 0;
}

.ipv4-rental .feature-list i {
    color: #10b981;
}

.ipv4-sale .feature-list i {
    color: #3b82f6;
}

.asn-registration .feature-list i {
    color: #8b5cf6;
}

.special-offer {
    background: #fff7ed;
    border-left: 4px solid #f59e0b;
    padding: 12px 15px;
    margin-top: 15px;
    border-radius: 0 8px 8px 0;
    display: flex;
    align-items: center;
}

.special-offer i {
    color: #f59e0b;
    margin-right: 10px;
}

.card-footer {
    margin-top: auto;
    padding-top: 20px;
}

.btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.ipv4-rental .btn {
    background: #10b981;
    color: white;
}

.ipv4-rental .btn:hover {
    background: #059669;
}

.ipv4-sale .btn {
    background: #3b82f6;
    color: white;
}

.ipv4-sale .btn:hover {
    background: #2563eb;
}

.asn-registration .btn {
    background: #8b5cf6;
    color: white;
}

.asn-registration .btn:hover {
    background: #7c3aed;
}

/* 服务对比表格样式 */
.comparison-section {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    margin-bottom: 60px;
}

.comparison-table {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

th, td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background: #f1f5f9;
    font-weight: 600;
    color: #1e293b;
}

tr:last-child td {
    border-bottom: none;
}

tr:nth-child(even) {
    background: #f8fafc;
}

.highlight {
    background: #eff6ff !important;
    font-weight: 600;
}

/* 响应式设计调整 */
@media (max-width: 768px) {
    .service-nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .service-nav li {
        margin: 0.3rem 0;
    }
    
    .service-nav a {
        width: 100%;
        text-align: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-section {
        padding: 20px;
    }
    
    th, td {
        padding: 12px 15px;
    }
}
/* FAQ导航样式 */
.faq-nav {
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    margin-bottom: 40px;
    position: sticky;
    top: 80px;
    z-index: 100;
}

.faq-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    flex-wrap: wrap;
}

.faq-nav li {
    margin: 0 10px;
}

.faq-nav a {
    text-decoration: none;
    color: #64748b;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.faq-nav a:hover, 
.faq-nav a.active {
    background: #3b82f6;
    color: white;
}

/* FAQ内容区域 */
.faq-content {
    padding: 40px 0;
}

.faq-category {
    margin-bottom: 60px;
}

.category-title {
    font-size: 1.8rem;
    color: #1e40af;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
    display: flex;
    align-items: center;
}

.category-title i {
    margin-right: 15px;
    font-size: 1.5rem;
}

/* FAQ项目样式 */
.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: #1e293b;
    background: #f8fafc;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: #64748b;
}

.faq-answer.active {
    padding: 20px;
    max-height: 1000px;
}

.faq-toggle {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

/* 高亮和警告样式 */
.highlight {
    color: #3b82f6;
    font-weight: 600;
}

.warning {
    color: #ef4444;
    font-weight: 600;
}

.note-box {
    background: #eff6ff;
    border-left: 4px solid #3b82f6;
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
}

.alert-box {
    background: #fef2f2;
    border-left: 4px solid #ef4444;
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
}

/* 联系部分样式 */
.contact-section {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    margin: 60px 0;
    text-align: center;
}

.contact-section h2 {
    font-size: 2rem;
    color: #1e293b;
    margin-bottom: 20px;
}

.contact-section p {
    color: #64748b;
    max-width: 600px;
    margin: 0 auto 30px;
}

.contact-btn {
    display: inline-block;
    padding: 12px 30px;
    background: #3b82f6;
    color: white;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background: #2563eb;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .faq-nav ul {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 10px;
    }
    
    .faq-nav li {
        margin: 0 5px;
    }
    
    .contact-section {
        padding: 20px;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
}

/* FAQ内容内部样式 */
.faq-answer p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.faq-answer ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.faq-answer li {
    margin-bottom: 8px;
    position: relative;
}

.faq-answer li:before {
    content: "•";
    color: #3b82f6;
    font-weight: bold;
    position: absolute;
    left: -15px;
}

/* 平滑滚动效果 */
.faq-category {
    scroll-margin-top: 120px;
}

/* 激活状态指示 */
.faq-nav a.active {
    position: relative;
}

.faq-nav a.active:after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #3b82f6;
    border-radius: 50%;
}

/* 服务条款页面专用样式 */
.terms-container {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
    line-height: 1.8;
}

.terms-container h1 {
    font-size: 2.5rem;
    color: #1e40af;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
}

.terms-container > p {
    margin-bottom: 30px;
    color: #64748b;
}

/* 高亮提示框 */
.highlight {
    background: #eff6ff;
    border-left: 4px solid #3b82f6;
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
}

.highlight strong {
    color: #1e40af;
}

/* 条款部分 */
.section {
    margin: 40px 0;
}

.section h2 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e2e8f0;
}

.section h3 {
    font-size: 1.4rem;
    color: #374151;
    margin: 25px 0 15px;
}

.section p {
    margin-bottom: 15px;
    color: #4b5563;
}

/* 列表样式 */
.section ul {
    margin: 15px 0;
    padding-left: 30px;
}

.section li {
    margin-bottom: 10px;
    position: relative;
}

.section li:before {
    content: "•";
    color: #3b82f6;
    font-weight: bold;
    position: absolute;
    left: -20px;
}

.section ul ul {
    margin: 10px 0;
}

.section ul ul li:before {
    content: "◦";
    color: #64748b;
}

/* 嵌套列表样式 */
.section ul ul {
    list-style-type: circle;
    padding-left: 20px;
}

/* 同意部分 */
.agree-section {
    background: #f9fafb;
    border-radius: 12px;
    padding: 30px;
    margin-top: 40px;
    text-align: center;
    border: 1px solid #e5e7eb;
}

.agree-section h3 {
    font-size: 1.5rem;
    color: #1e40af;
    margin-bottom: 15px;
}

.agree-section p {
    color: #64748b;
    margin-bottom: 0;
}

/* 强调文本 */
strong {
    color: #1e293b;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .terms-container {
        padding: 20px;
    }
    
    .terms-container h1 {
        font-size: 2rem;
    }
    
    .section h2 {
        font-size: 1.5rem;
    }
    
    .section h3 {
        font-size: 1.2rem;
    }
    
    .section ul {
        padding-left: 20px;
    }
}

/* 打印样式 */
@media print {
    .terms-container {
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }
    
    .highlight {
        border: 1px solid #3b82f6;
    }
}

/* 文件下载页面专用样式 */

/* 分类导航 */
.category-nav {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    padding: 20px;
    margin-bottom: 40px;
}

.category-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    flex-wrap: wrap;
    gap: 10px;
}

.category-nav li {
    margin: 0;
}

.category-nav a {
    display: block;
    padding: 10px 20px;
    background: #f8fafc;
    border-radius: 30px;
    text-decoration: none;
    color: #64748b;
    font-weight: 600;
    transition: all 0.3s ease;
}

.category-nav a:hover,
.category-nav a.active {
    background: #3b82f6;
    color: white;
}

/* 分类区域 */
.category-section {
    margin-bottom: 60px;
}

.category-title {
    font-size: 1.8rem;
    color: #1e40af;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
    display: flex;
    align-items: center;
}

.category-title i {
    margin-right: 15px;
    font-size: 1.5rem;
}

/* 下载网格 */
.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

/* 下载卡片 */
.download-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 卡片头部 */
.card-header {
    background: linear-gradient(135deg, #1e40af, #3b82f6);
    color: white;
    padding: 25px;
    display: flex;
    align-items: center;
}

.file-icon {
    font-size: 2.5rem;
    margin-right: 15px;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
}

.card-title {
    flex: 1;
}

.card-title h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.file-type {
    font-size: 0.85rem;
    opacity: 0.9;
}

/* 卡片主体 */
.card-body {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-description {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.6;
}

.file-meta {
    display: flex;
    justify-content: space-between;
    color: #94a3b8;
    font-size: 0.9rem;
    margin-top: auto;
    padding-top: 15px;
    border-top: 1px solid #f1f5f9;
}

/* 下载按钮 */
.download-btn {
    display: block;
    background: #3b82f6;
    color: white;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.download-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

.download-btn i {
    margin-right: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .category-nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .category-nav a {
        width: 100%;
        text-align: center;
    }
    
    .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
    }
    
    .file-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .file-meta {
        flex-direction: column;
        gap: 5px;
    }
}

/* 文件类型颜色变体 */
.file-icon-contract {
    color: #10b981;
}

.file-icon-handshake {
    color: #8b5cf6;
}

.file-icon-exchange {
    color: #f59e0b;
}

.file-icon-stamp {
    color: #ef4444;
}

.file-icon-globe {
    color: #3b82f6;
}

.file-icon-clipboard {
    color: #06b6d4;
}

.file-icon-receipt {
    color: #84cc16;
}

/* 动画效果 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.download-btn:active {
    animation: pulse 0.3s ease;
}

/* 空状态样式 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #64748b;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #cbd5e1;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #475569;
}

.empty-state p {
    max-width: 500px;
    margin: 0 auto;
}
        
        /* 案例展示部分 */
        .cases-intro {
            text-align: center;
            margin-bottom: 3rem;
        }
        
        .cases-intro h2 {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 1rem;
        }
        
        .cases-intro p {
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto;
            color: var(--text);
        }
        
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-bottom: 4rem;
        }
        
        .case-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            position: relative;
        }
        
        .case-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .case-image {
            height: 250px;
            overflow: hidden;
            position: relative;
        }
        
        .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .case-card:hover .case-image img {
            transform: scale(1.05);
        }
        
        .case-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
            display: flex;
            align-items: flex-end;
            padding: 1.5rem;
        }
        
        .case-overlay h3 {
            color: white;
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }
        
        .case-overlay p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
        }
        
        .case-content {
            padding: 1.5rem;
        }
        
        .case-content p {
            margin-bottom: 1.5rem;
            color: var(--text);
        }
        
        .case-stats {
            display: flex;
            justify-content: space-between;
            background: var(--light);
            padding: 0.8rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        
        .stat-item {
            text-align: center;
            flex: 1;
        }
        
        .stat-value {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
        }
        
        .stat-label {
            font-size: 0.8rem;
            color: #6b7280;
        }
        
        .benefits-section {
            
            color: white;
            padding: 4rem 0;
            margin: 4rem 0;
            text-align: center;
                        background: linear-gradient(rgba(30, 64, 175, 0.9), rgba(59, 130, 246, 0.9)), url('https://images.unsplash.com/photo-1551836022-d5d88e9218df?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
        }
        
        .benefits-container {
            max-width: 1000px;
            margin: 0 auto;
            
        }
        
        .benefits-title {
            font-size: 2rem;
            margin-bottom: 2rem;
        }
        
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        
        .benefit-card {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 2rem;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        
        .benefit-card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.15);
        }
        
        .benefit-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: white;
        }
        
        .benefit-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        
        .benefit-card p {
            opacity: 0.9;
        }
        
        .testimonials {
            margin: 4rem 0;
            text-align: center;
        }
        
        .testimonials h2 {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 2rem;
        }
        
        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            max-width: 800px;
            margin: 0 auto;
            position: relative;
        }
        
        .testimonial-card::before {
            content: """;
            font-size: 5rem;
            position: absolute;
            top: -20px;
            left: 20px;
            color: var(--light);
            font-family: Georgia, serif;
        }
        
        .testimonial-text {
            font-size: 1.1rem;
            font-style: italic;
            margin-bottom: 1.5rem;
            color: var(--text);
        }
        
        .testimonial-author {
            font-weight: 600;
            color: var(--primary);
        }
        
        .testimonial-company {
            color: #6b7280;
            font-size: 0.9rem;
        }
        /* 服务卡片网格容器样式 */
/* 产品服务页面专用样式 - 避免与其他页面冲突 */

/* 页面头部 */
.product-page-header {
    background: linear-gradient(rgba(30, 64, 175, 0.85), rgba(59, 130, 246, 0.85)), url('https://images.unsplash.com/photo-1551836022-d5d88e9218df?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 5rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.product-page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.product-page-header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.95;
}

/* 服务导航 */
.product-service-nav {
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
    margin-bottom: 40px;
    position: sticky;
    top: 80px;
    z-index: 100;
}

.product-service-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    flex-wrap: wrap;
}

.product-service-nav li {
    margin: 0 10px;
}

.product-service-nav a {
    text-decoration: none;
    color: #64748b;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.product-service-nav a:hover, 
.product-service-nav a.active {
    background: #3b82f6;
    color: white;
}

/* 服务卡片网格 */
.product-services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0 60px;
}

/* 服务卡片 */
.product-service-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 卡片头部 */
.product-card-header {
    padding: 30px 30px 20px;
    text-align: center;
}

.product-card-icon {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: white;
}

.product-ipv4-rental .product-card-icon {
    background: linear-gradient(135deg, #10b981, #34d399);
}

.product-ipv4-sale .product-card-icon {
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.product-asn-registration .product-card-icon {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa);
}

.product-card-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #1e293b;
    font-weight: 700;
}

.product-card-price {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 5px;
}

.price-main {
    font-size: 2.2rem;
    font-weight: 800;
}

.price-unit {
    font-size: 1rem;
    font-weight: 500;
    margin-top: 5px;
    color: #64748b;
}

.product-ipv4-rental .price-main {
    color: #10b981;
}

.product-ipv4-sale .price-main {
    color: #3b82f6;
}

.product-asn-registration .price-main {
    color: #8b5cf6;
}

.product-card-description {
    color: #64748b;
    margin: 15px 0 0;
    line-height: 1.6;
}

/* 卡片主体 */
.product-card-body {
    padding: 0 30px 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-card-features {
    margin-bottom: 25px;
}

.product-card-features h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #1e293b;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 8px;
}

.product-feature-list {
    list-style: none;
}

.product-feature-list li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
}

.product-feature-list i {
    margin-right: 10px;
    margin-top: 4px;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.product-ipv4-rental .product-feature-list i {
    color: #10b981;
}

.product-ipv4-sale .product-feature-list i {
    color: #3b82f6;
}

.product-asn-registration .product-feature-list i {
    color: #8b5cf6;
}

.product-special-offer {
    background: #fff7ed;
    border-left: 4px solid #f59e0b;
    padding: 12px 15px;
    margin-top: 15px;
    border-radius: 0 8px 8px 0;
    display: flex;
    align-items: center;
}

.product-special-offer i {
    color: #f59e0b;
    margin-right: 10px;
    font-size: 1.2rem;
}

.product-card-footer {
    margin-top: auto;
    padding-top: 20px;
}

.product-btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.product-ipv4-rental .product-btn {
    background: #10b981;
    color: white;
}

.product-ipv4-rental .product-btn:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3);
}

.product-ipv4-sale .product-btn {
    background: #3b82f6;
    color: white;
}

.product-ipv4-sale .product-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59, 130, 246, 0.3);
}

.product-asn-registration .product-btn {
    background: #8b5cf6;
    color: white;
}

.product-asn-registration .product-btn:hover {
    background: #7c3aed;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

/* 服务对比表格 */
.product-comparison-section {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    margin-bottom: 60px;
}

.product-section-title {
    text-align: center;
    margin-bottom: 30px;
}

.product-section-title h2 {
    font-size: 2.2rem;
    color: #1e293b;
    margin-bottom: 15px;
}

.product-section-title p {
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.product-comparison-table {
    overflow-x: auto;
}

.product-comparison-table table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.product-comparison-table th, 
.product-comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.product-comparison-table th {
    background: #f1f5f9;
    font-weight: 600;
    color: #1e293b;
}

.product-comparison-table tr:last-child td {
    border-bottom: none;
}

.product-comparison-table tr:nth-child(even) {
    background: #f8fafc;
}

.product-highlight {
    background: #eff6ff !important;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .product-services-grid {
        grid-template-columns: 1fr;
    }
    
    .product-service-nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .product-service-nav li {
        margin: 0.3rem 0;
    }
    
    .product-service-nav a {
        width: 100%;
        text-align: center;
    }
    
    .product-comparison-section {
        padding: 20px;
    }
    
    .product-comparison-table th, 
    .product-comparison-table td {
        padding: 12px 15px;
    }
    
    .product-page-header {
        padding: 3rem 0;
    }
    
    .product-page-header h1 {
        font-size: 2.2rem;
    }
}