:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #f59e0b;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 加载动画 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-text {
    margin-top: 20px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 8px;
    color: #fff;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 粒子背景 */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* 容器 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.logo {
    display: flex;
    align-items: baseline;
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-dot {
    color: var(--accent-color);
    margin: 0 2px;
}

.logo-tech {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
}

.nav-menu a::before {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.nav-menu a:hover::before {
    opacity: 1;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

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

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

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

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    padding: 10px 20px;
    font-size: 14px;
}

.btn-ghost:hover {
    color: var(--primary-color);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    transition: transform var(--transition-normal);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(255, 107, 107, 0.2) 0%, transparent 40%);
    z-index: -1;
}

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

.hero-content {
    color: #fff;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    animation: fadeInDown 1s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
    overflow: hidden;
}

.line-1 {
    animation: slideInUp 1s ease 0.2s both;
}

.line-2 {
    animation: slideInUp 1s ease 0.4s both;
}

.hero-description {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 500px;
    animation: fadeIn 1s ease 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease 0.8s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeIn 1s ease 1s both;
}

.hero-stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
}

.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease 0.4s both;
}

.floating-card {
    position: absolute;
    padding: 24px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    text-align: center;
    color: #fff;
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.card-label {
    font-size: 14px;
    font-weight: 500;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation: float 6s ease-in-out infinite;
}

.card-2 {
    top: 40%;
    right: 10%;
    animation: float 6s ease-in-out infinite 2s;
}

.card-3 {
    bottom: 15%;
    left: 30%;
    animation: float 6s ease-in-out infinite 4s;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: #fff;
    border-radius: 2px;
    animation: scroll 1.5s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; top: 8px; }
    50% { opacity: 0; top: 20px; }
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section通用样式 */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-secondary);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: 50px;
    margin-bottom: 24px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.title-accent {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.title-main {
    color: var(--text-primary);
}

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

/* 服务项目 */
.services {
    background: var(--bg-secondary);
}

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

.service-card {
    position: relative;
    padding: 50px 40px;
    background: #fff;
    border-radius: 24px;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.service-number {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 60px;
    font-weight: 800;
    color: var(--bg-secondary);
    line-height: 1;
    transition: color var(--transition-normal);
}

.service-card:hover .service-number {
    color: rgba(99, 102, 241, 0.1);
}

.service-icon-wrapper {
    width: 80px;
    height: 80px;
    background: var(--bg-secondary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon-wrapper {
    background: var(--gradient-primary);
    transform: scale(1.1);
}

.service-card:hover .service-icon-wrapper svg {
    stroke: #fff;
}

.service-icon {
    color: var(--primary-color);
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.service-description {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition-fast);
}

.service-link:hover {
    gap: 12px;
}

.service-link svg {
    transition: transform var(--transition-normal);
}

.service-link:hover svg {
    transform: translateX(4px);
}

/* 业务领域 */
.business {
    background: #fff;
}

.business-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.business-card-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.business-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 30px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.business-card:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
}

.business-card.active {
    background: #fff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.card-index {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
    min-width: 60px;
}

.business-card.active .card-index {
    color: var(--primary-color);
}

.card-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

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

.business-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag {
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    border-radius: 50px;
    transition: all var(--transition-normal);
    cursor: default;
}

.tag:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

.about-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
    z-index: 0;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
}

.about-image {
    width: 100%;
    height: 500px;
    background: var(--gradient-primary);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.placeholder-text {
    font-size: 72px;
    font-weight: 800;
    letter-spacing: 8px;
}

.placeholder-sub {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 12px;
    margin-top: 8px;
}

.about-card {
    position: absolute;
    padding: 24px 32px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    text-align: center;
    animation: float 4s ease-in-out infinite;
}

.about-card-1 {
    top: 40px;
    right: -40px;
}

.about-card-2 {
    bottom: 40px;
    left: -40px;
    animation-delay: 2s;
}

.card-value {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.card-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.about-content {
    max-width: 550px;
}

.about-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.about-features {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: #fff;
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.feature-icon {
    width: 24px;
    height: 24px;
    color: #10b981;
    flex-shrink: 0;
}

.about-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 32px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-plus,
.stat-percent {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--border-color);
}

/* 联系我们 */
.contact {
    background: #fff;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.contact-card:hover {
    background: #fff;
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.contact-icon-wrapper {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

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

.contact-form-wrapper {
    background: #fff;
    border-radius: 24px;
    box-shadow: var(--shadow-2xl);
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 16px 20px;
    font-size: 15px;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: 12px;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    background: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: #fff;
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand {
    margin-bottom: 24px;
}

.footer-description {
    margin-top: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-3px);
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
}

.footer-nav {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 12px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: #fff;
}

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

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.contact-list li svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .business-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }

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

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

    .hero-description {
        margin: 0 auto 40px;
    }

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

    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-visual {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: #fff;
        padding: 30px;
        box-shadow: var(--shadow-xl);
        transform: translateY(-150%);
        transition: transform var(--transition-normal);
        gap: 20px;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-actions .btn {
        display: none;
    }

    .hamburger {
        display: flex;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-divider {
        width: 50px;
        height: 1px;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 28px;
    }

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

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