/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根变量 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --secondary-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --max-width: 1200px;
    --border-radius: 12px;
}

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    opacity: 1;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.logo-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff20" fill-opacity="1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 560px;
}

.hero-title {
    margin-bottom: 24px;
}

.title-main {
    display: block;
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-subtitle {
    display: block;
    font-size: 24px;
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 32px;
    opacity: 0.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* 漂浮卡片动画 */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

.card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 16px 24px;
    font-weight: 600;
    color: white;
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 20%;
    animation-delay: 1.5s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 3s;
}

.card-4 {
    top: 10%;
    right: 10%;
    animation-delay: 4.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

/* 通用区块样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 核心功能区域 */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 技术优势区域 */
.advantages {
    background: white;
}

.advantages-content {
    display: grid;
    gap: 48px;
}

.advantage-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 32px;
    align-items: start;
}

.advantage-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.2;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.advantage-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 16px;
}

/* 应用场景区域 */
.scenarios {
    background: var(--bg-secondary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.scenario-card {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid var(--border-color);
}

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.scenario-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.scenario-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.scenario-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.cta-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-logo .logo-text {
    color: white;
    font-size: 28px;
}

.footer-logo .logo-subtitle {
    color: var(--text-light);
}

.footer-brand p {
    color: var(--text-light);
    font-size: 16px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1200px) {
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}

.link-group h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 8px;
}

.link-group a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.link-group a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --border-radius: 8px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .title-main {
        font-size: 48px;
    }
    
    .title-subtitle {
        font-size: 20px;
    }
    
    .section-header h2 {
        font-size: 36px;
    }
    
    .features-grid,
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .advantage-item {
        grid-template-columns: 60px 1fr;
        gap: 20px;
    }
    
    .advantage-number {
        font-size: 36px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .cta-content h2 {
        font-size: 36px;
    }
    
    .hero-actions,
    .cta-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-container {
        padding: 0 16px;
        height: 70px;
    }
    
    .hero {
        padding: 100px 0 40px;
    }
    
    .title-main {
        font-size: 36px;
    }
    
    .title-subtitle {
        font-size: 18px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .feature-card,
    .scenario-card {
        padding: 24px;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 16px;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选择文本样式 */
::selection {
    background: var(--primary-light);
    color: white;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 产品方案区域 */
.products {
    background: var(--bg-secondary);
}

/* 标签页样式 */
.network-tabs {
    margin-bottom: 40px;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 24px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    position: relative;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid white;
}

/* 网络信息样式 */
.network-info {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.network-info h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.network-info p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* 产品表格样式 */
.products-content {
    margin-bottom: 60px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.products-table {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.products-table table {
    width: 100%;
    border-collapse: collapse;
}

.products-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.5px;
}

.products-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-primary);
}

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

.products-table tr:hover {
    background: var(--bg-secondary);
}

.products-table .price {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 16px;
}

/* 小按钮样式 */
.btn-small {
    padding: 8px 16px;
    font-size: 12px;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-small:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 定制服务区域 */
.custom-services {
    margin-top: 60px;
}

.custom-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.custom-card {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    text-align: center;
}

.custom-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.custom-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.custom-card h4 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.custom-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.custom-card ul {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.custom-card li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.custom-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* 响应式设计扩展 */
@media (max-width: 768px) {
    .tab-buttons {
        gap: 6px;
        padding: 0 10px;
    }
    
    .tab-btn {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .products-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .products-table table {
        min-width: 700px;
    }
    
    .custom-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .custom-card {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .network-info {
        padding: 20px 16px;
    }
    
    .network-info h3 {
        font-size: 20px;
    }
    
    .network-info p {
        font-size: 14px;
    }
    
    .products-table th,
    .products-table td {
        padding: 12px 8px;
        font-size: 12px;
    }
    
    .products-table .price {
        font-size: 14px;
    }
    
    .btn-small {
        padding: 6px 12px;
        font-size: 11px;
    }
    
    .custom-card {
        padding: 24px 20px;
    }
    
    .custom-icon {
        width: 60px;
        height: 60px;
    }
    
    .custom-card h4 {
        font-size: 20px;
    }
    
    .custom-card p {
        font-size: 14px;
    }
    
    .custom-card li {
        font-size: 13px;
    }
}