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

:root {
    --primary-color: #7c3aed;
    --secondary-color: #ec4899;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --dark-bg: #0a0a0a;
    --dark-surface: #111111;
    --dark-card: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #e5e7eb;
    --text-muted: #9ca3af;
    --border-color: #2d2d2d;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a0a 0%, #111111 100%);
    --gradient-glow: linear-gradient(135deg, #7c3aed 0%, #ec4899 50%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--dark-bg);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 60% 60%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 25s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { 
        transform: scale(1) rotate(0deg);
        filter: hue-rotate(0deg);
    }
    25% { 
        transform: scale(1.05) rotate(0.5deg);
        filter: hue-rotate(90deg);
    }
    50% { 
        transform: scale(1.1) rotate(1deg);
        filter: hue-rotate(180deg);
    }
    75% { 
        transform: scale(1.05) rotate(0.5deg);
        filter: hue-rotate(270deg);
    }
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.nav-logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-logo:hover::after {
    transform: scaleX(1);
}

.nav-logo i {
    margin-right: 0.5rem;
    font-size: 1.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-3px); }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 0.5rem 0;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
}

.nav-menu a:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-menu a:hover::before {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

/* 主页横幅 */
.hero {
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-dark);
    opacity: 0.7;
    z-index: -1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.8rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 50%, #9ca3af 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.hero-content h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: expandWidth 1.5s ease-out 0.5s both;
}

@keyframes expandWidth {
    from { width: 0; }
    to { width: 100px; }
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    animation: fadeInUp 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
    line-height: 1.7;
    font-weight: 300;
}

.hero-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.stat {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

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

.stat:hover {
    transform: translateY(-8px) scale(1.05);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    animation: fadeInUp 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.6s both;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

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

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px) scale(1.05);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* CDN可视化 */
.cdn-visualization {
    position: relative;
    width: 450px;
    height: 450px;
    margin: 0 auto;
    animation: fadeInRight 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.8s both;
}

.center-node {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90px;
    height: 90px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: white;
    animation: pulse 3s ease-in-out infinite;
    box-shadow: 0 0 40px rgba(124, 58, 237, 0.6);
    position: relative;
}

.center-node::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: ripple 2s ease-out infinite;
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.edge-nodes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.node {
    position: absolute;
    width: 45px;
    height: 45px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    animation: float 4s ease-in-out infinite;
    animation-delay: var(--delay);
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.6);
    transition: all 0.3s ease;
}

.node:hover {
    transform: scale(1.2);
    box-shadow: 0 0 35px rgba(6, 182, 212, 0.8);
}

.node:nth-child(1) { top: 8%; left: 18%; }
.node:nth-child(2) { top: 8%; right: 18%; }
.node:nth-child(3) { top: 50%; left: 3%; }
.node:nth-child(4) { top: 50%; right: 3%; }
.node:nth-child(5) { bottom: 8%; left: 18%; }
.node:nth-child(6) { bottom: 8%; right: 18%; }

@keyframes pulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 40px rgba(124, 58, 237, 0.6);
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.1);
        box-shadow: 0 0 60px rgba(124, 58, 237, 0.8);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px) scale(1) rotate(0deg); }
    25% { transform: translateY(-8px) scale(1.05) rotate(5deg); }
    50% { transform: translateY(-15px) scale(1.1) rotate(0deg); }
    75% { transform: translateY(-8px) scale(1.05) rotate(-5deg); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 服务部分 */
.services {
    padding: 100px 0;
    background: var(--dark-surface);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.services .container {
    position: relative;
    z-index: 1;
}

.services h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
}

.services h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    backdrop-filter: blur(25px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.service-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.service-card:hover .service-icon::before {
    left: 100%;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
    font-weight: 700;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.05rem;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 0.8rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.service-card li:hover {
    color: var(--text-primary);
    transform: translateX(5px);
}

.service-card li i {
    color: var(--success-color);
    margin-right: 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.service-card li:hover i {
    transform: scale(1.2);
}

/* 功能特色 */
.features {
    padding: 100px 0;
    background: var(--dark-bg);
}

.features h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
}

.features h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: 2px;
}

.features-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(550px, 1fr));
    gap: 2.5rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    padding: 2.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(25px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-secondary);
    transform: scaleY(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover::before {
    transform: scaleY(1);
}

.feature-item:hover {
    transform: translateX(15px) scale(1.02);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-secondary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.4);
    transition: all 0.4s ease;
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 0 35px rgba(6, 182, 212, 0.6);
}

.feature-text h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.feature-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* 价格方案 */
.pricing {
    padding: 100px 0;
    background: var(--dark-surface);
    position: relative;
}

.pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.pricing .container {
    position: relative;
    z-index: 1;
}

.pricing h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
}

.pricing h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    text-align: center;
    backdrop-filter: blur(25px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
    background: rgba(124, 58, 237, 0.1);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    opacity: 0.1;
}

.pricing-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-15px) scale(1.03);
}

.pricing-header h3 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

.price {
    margin-bottom: 2.5rem;
}

.currency {
    font-size: 1.3rem;
    color: var(--text-muted);
    font-weight: 500;
}

.amount {
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.period {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2.5rem;
}

.pricing-features li {
    padding: 1rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.pricing-features li:hover {
    color: var(--text-primary);
    transform: scale(1.05);
}

.pricing-features li i {
    color: var(--success-color);
    margin-right: 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.pricing-features li:hover i {
    transform: scale(1.2);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--dark-bg);
}

.contact h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, #ffffff 0%, #e5e7eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
}

.contact h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(25px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-item:hover::before {
    transform: scaleY(1);
}

.contact-item:hover {
    transform: translateX(15px) scale(1.02);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.contact-item i {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    font-size: 1.3rem;
    transition: all 0.4s ease;
}

.contact-item:hover i {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 0 25px rgba(124, 58, 237, 0.5);
}

.contact-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-weight: 700;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 2.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(25px);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-form:hover::before {
    transform: scaleX(1);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.1);
    transform: translateY(-2px);
}

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

/* 页脚 */
.footer {
    background: var(--dark-surface);
    color: var(--text-primary);
    padding: 80px 0 30px;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
    position: relative;
    padding-left: 0;
}

.footer-section ul li a::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: all 0.3s ease;
    color: var(--accent-color);
}

.footer-section ul li a:hover {
    color: var(--accent-color);
    padding-left: 20px;
}

.footer-section ul li a:hover::before {
    opacity: 1;
}

.social-links {
    display: flex;
    gap: 1.2rem;
}

.social-links a {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    font-size: 1.2rem;
}

.social-links a:hover {
    background: var(--gradient-primary);
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
    }
    
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .cdn-visualization {
        width: 350px;
        height: 350px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features-content {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .cdn-visualization {
        width: 280px;
        height: 280px;
    }
    
    .center-node {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
    .node {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
    
    .service-card,
    .feature-item,
    .pricing-card {
        padding: 2rem;
    }
    
    .services h2,
    .features h2,
    .pricing h2,
    .contact h2 {
        font-size: 2.2rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
    border: 2px solid var(--dark-bg);
}

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