/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 */
:root {
    --primary-color: #00ffff;
    --secondary-color: #7b61ff;
    --accent-color: #ff46a3;
    --dark-bg: #0a0a0f;
    --darker-bg: #050508;
    --card-bg: #12121b;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b8;
    --border-color: #1e1e2e;
    --gradient-primary: linear-gradient(135deg, #00ffff 0%, #7b61ff 100%);
    --gradient-secondary: linear-gradient(135deg, #ff46a3 0%, #7b61ff 100%);
    --gradient-bg: radial-gradient(circle at 20% 50%, rgba(123, 97, 255, 0.1) 0%, transparent 50%),
                   radial-gradient(circle at 80% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
                   radial-gradient(circle at 40% 20%, rgba(255, 70, 163, 0.1) 0%, transparent 50%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 255, 255, 0.3);
    --shadow-glow-secondary: 0 0 20px rgba(123, 97, 255, 0.3);
}

/* 基础样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--dark-bg);
    background-image: var(--gradient-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 15, 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: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 20px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(123, 97, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 70, 163, 0.1) 0%, transparent 50%);
    animation: gradientShift 15s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-20px, -20px) rotate(120deg); }
    66% { transform: translate(20px, -10px) rotate(240deg); }
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease-in-out infinite;
}

@keyframes gradientFlow {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(30deg); }
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--dark-bg);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--dark-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* 网络动画 */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.network-animation {
    position: relative;
    width: 400px;
    height: 400px;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    box-shadow: 0 0 20px var(--primary-color);
    animation: nodePulse 3s ease-in-out infinite;
}

.node-1 {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    animation-delay: 0s;
}

.node-2 {
    top: 20%;
    left: 70%;
    animation-delay: 0.5s;
}

.node-3 {
    top: 70%;
    left: 20%;
    animation-delay: 1s;
}

.node-4 {
    top: 20%;
    left: 20%;
    animation-delay: 1.5s;
}

.node-5 {
    top: 70%;
    left: 70%;
    animation-delay: 2s;
}

@keyframes nodePulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.7; }
}

.connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform-origin: left center;
    animation: connectionGlow 3s ease-in-out infinite;
}

.connection-1 {
    top: 50%;
    left: 50%;
    width: 120px;
    transform: rotate(-45deg);
    animation-delay: 0s;
}

.connection-2 {
    top: 50%;
    left: 50%;
    width: 120px;
    transform: rotate(45deg);
    animation-delay: 1s;
}

.connection-3 {
    top: 50%;
    left: 50%;
    width: 120px;
    transform: rotate(135deg);
    animation-delay: 2s;
}

.connection-4 {
    top: 50%;
    left: 50%;
    width: 120px;
    transform: rotate(-135deg);
    animation-delay: 0.5s;
}

.connection-5 {
    top: 35%;
    left: 35%;
    width: 170px;
    transform: rotate(0deg);
    animation-delay: 1.5s;
}

@keyframes connectionGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    animation: bounce 2s ease-in-out infinite;
}

.hero-scroll i {
    margin-top: 10px;
    font-size: 24px;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 关于我们 */
.about {
    background: var(--darker-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.tech-stack {
    display: flex;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-width: 120px;
    transition: all 0.3s ease;
}

.tech-item i {
    font-size: 40px;
    color: var(--primary-color);
}

.tech-item span {
    font-weight: 600;
    color: var(--text-primary);
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.stat-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 技术架构 */
.architecture-diagram {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.architecture-layer {
    margin-bottom: 60px;
    position: relative;
}

.layer-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.layer-content {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.component {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    min-width: 200px;
    transition: all 0.3s ease;
    position: relative;
}

.component::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 12px 12px 0 0;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.component:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.component:hover::before {
    transform: scaleX(1);
}

.component i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.component span {
    display: block;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.component p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.layer-middle::before,
.layer-bottom::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: var(--gradient-primary);
}

/* 核心优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.advantage-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.advantage-card:hover::before {
    opacity: 0.05;
}

.card-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 40px;
    color: var(--dark-bg);
    transition: all 0.3s ease;
}

.advantage-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.advantage-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 功能特性 */
.features {
    background: var(--darker-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.category-title i {
    font-size: 32px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.feature-item i {
    color: var(--primary-color);
    font-size: 18px;
}

.feature-item:hover {
    color: var(--primary-color);
    padding-left: 10px;
}

/* 产品对比 */
.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--gradient-primary);
    color: var(--dark-bg);
    font-weight: 700;
}

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

.comparison-table tr:hover {
    background: rgba(0, 255, 255, 0.05);
}

.highlight {
    color: var(--primary-color);
    font-weight: 700;
}

/* 客户案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.case-logo {
    font-size: 60px;
    margin-bottom: 20px;
    text-align: center;
}

.case-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    text-align: center;
    color: var(--text-primary);
}

.case-card p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.6;
    text-align: center;
}

.case-stats {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.case-stats span {
    background: rgba(0, 255, 255, 0.1);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(0, 255, 255, 0.3);
}

/* 技术文档 */
.docs {
    background: var(--darker-bg);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.doc-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.doc-category-title {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.doc-category-title i {
    font-size: 32px;
}

.doc-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.doc-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.doc-item:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.doc-item i {
    color: var(--primary-color);
    font-size: 18px;
}

.doc-item span {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 16px;
}

.doc-item p {
    font-size: 14px;
    line-height: 1.5;
}

/* 产品定价 */
.pricing {
    background: var(--darker-bg);
}

.pricing-tiers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.tier-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 30px;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: scale(0.8);
}

.tier-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.tier-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.tier-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: var(--dark-bg);
    padding: 8px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
}

.tier-header {
    text-align: center;
    margin-bottom: 30px;
}

.tier-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.tier-card.basic .tier-header h3 {
    color: #4ade80;
}

.tier-card.business .tier-header h3 {
    color: var(--primary-color);
}

.tier-card.enterprise .tier-header h3 {
    color: var(--accent-color);
}

.price {
    margin-bottom: 15px;
}

.currency {
    font-size: 20px;
    color: var(--text-secondary);
    vertical-align: top;
}

.amount {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
}

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

.tier-desc {
    color: var(--text-secondary);
    font-size: 16px;
}

.tier-features {
    flex: 1;
    margin-bottom: 30px;
}

.tier-features ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tier-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 16px;
}

.tier-features li i.fa-check {
    color: #4ade80;
}

.tier-features li i.fa-times {
    color: #f87171;
}

.tier-cta {
    text-align: center;
}

.pricing-features {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.pricing-features h3 {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.pricing-features .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.pricing-features .feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.pricing-features .feature-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.feature-info h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    background: rgba(0, 255, 255, 0.1);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 255, 0.3);
}

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.contact-item i {
    font-size: 32px;
    color: var(--primary-color);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 255, 0.1);
    border-radius: 50%;
}

.contact-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 255, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
}

/* 友情链接 */
.friend-links {
    background: var(--dark-bg);
    padding: 80px 0;
}

.links-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.link-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.link-category:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.link-category h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.link-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.link-list a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 0;
    transition: all 0.3s ease;
    position: relative;
    font-size: 15px;
}

.link-list a::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.link-list a:hover {
    color: var(--primary-color);
    padding-left: 10px;
}

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

/* 页脚 */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

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

.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* 动画效果 */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--darker-bg);
        transition: left 0.3s ease;
        overflow-y: auto;
    }

    .nav-dropdown .dropdown-menu {
        position: static;
        background: var(--dark-bg);
        border: none;
        border-left: 2px solid var(--primary-color);
        box-shadow: none;
        margin-left: 20px;
        margin-top: 10px;
        margin-bottom: 10px;
    }

    .dropdown-item {
        padding: 10px 15px;
        font-size: 14px;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        padding: 40px 20px;
        gap: 20px;
    }

    .nav-link {
        font-size: 20px;
        padding: 15px 0;
        display: block;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        height: 300px;
    }

    .network-animation {
        width: 300px;
        height: 300px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .tech-stack {
        justify-content: center;
    }

    .layer-content {
        flex-direction: column;
        align-items: center;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

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

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .docs-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    /* 产品定价移动端适配 */
    .pricing-tiers {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .tier-card {
        padding: 30px 20px;
        transform: scale(1);
        opacity: 1;
    }

    .tier-card.featured {
        transform: scale(1);
    }

    .tier-card.featured:hover {
        transform: translateY(-10px);
    }

    /* 友情链接移动端适配 */
    .links-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .link-category {
        padding: 20px;
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    /* 产品定价超小屏幕适配 */
    .pricing-tiers {
        gap: 15px;
    }

    .tier-card {
        padding: 25px 15px;
    }

    .tier-header h3 {
        font-size: 20px;
    }

    .amount {
        font-size: 36px;
    }

    /* 友情链接超小屏幕适配 */
    .links-container {
        gap: 15px;
    }

    .link-category {
        padding: 15px;
    }

    .link-category h3 {
        font-size: 18px;
    }

    .link-list a {
        font-size: 14px;
    }

    section {
        padding: 60px 0;
    }

    .contact-form {
        padding: 30px 20px;
    }
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

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

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

/* 选择文本样式 */
::selection {
    background: rgba(0, 255, 255, 0.3);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(0, 255, 255, 0.3);
    color: var(--text-primary);
}