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

:root {
    --primary-color: #0066ff;
    --secondary-color: #0066ff;
    --dark-bg: #f5f5fa;
    --section-alt-bg: #e4e9f0;
    --card-bg: #f7f9ff;
    --text-light: #2c3e50;
    --text-gray: #596b7e;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-light: rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    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(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding-top: 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

/* hero canvas removed */

/* aurora layer removed */

.hero-bg-img {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 115%;
    height: 115%;
    object-fit: cover;
    transform: translate(-50%, -50%) scale(1);
    will-change: transform;
    filter: blur(8px) saturate(1.15) contrast(1.05) brightness(1.05);
    opacity: 0.9;
}

.hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(1000px 600px at 10% 20%, rgba(102,126,234,0.12), transparent 60%),
        radial-gradient(800px 500px at 80% 70%, rgba(118,75,162,0.10), transparent 60%),
        linear-gradient(180deg, rgba(10,16,32,0.08), rgba(255,255,255,0.12));
    pointer-events: none;
}
.hero .container {
    position: relative;
    z-index: 1;
}


.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #00d4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-light);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-gray);
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.4s both;
}

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

@media (prefers-reduced-motion: reduce) {
    .hero-bg-img {
        filter: blur(6px) saturate(1.1) contrast(1.02) brightness(1.02);
    }
}

/* Section 通用样式 */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

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

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-light);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.about-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* 核心服务 */
.services {
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--section-alt-bg) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    transition: all 0.3s;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.service-card:hover::before {
    opacity: 0.1;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    position: relative;
}

.service-card p {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    position: relative;
}

/* 解决方案 */
.solutions {
    background: var(--dark-bg);
}

.solutions-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.flow-item {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-light);
    transition: all 0.3s;
    position: relative;
}

.flow-item:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.flow-number {
    font-size: 2.5rem;
    font-weight: bold;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.flow-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.flow-item p {
    color: var(--text-gray);
}

/* 资质荣誉 */
.qualifications {
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--section-alt-bg) 100%);
}

.qualifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.qual-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s;
}

.qual-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(118, 75, 162, 0.4);
}

.qual-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.qual-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.qual-card p {
    color: var(--text-gray);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    padding: 60px 0 30px;
    text-align: center;
    border-top: 1px solid var(--border-light);
}

.footer h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer p {
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

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

.contact-item strong {
    color: var(--text-light);
}

.copyright {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-light);
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .services-grid,
    .solutions-flow,
    .qualifications-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 1rem;
    }
}