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

:root {
    --primary-color: #1d1d1f;
    --secondary-color: #0071e3;
    --accent-color: #06c;
    --text-color: #1d1d1f;
    --text-light: #6e6e73;
    --bg-light: #f5f5f7;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    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(20px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

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

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* 首页横幅 */
.hero {
    padding: 180px 0 120px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 16px 48px;
    background: var(--white);
    color: var(--secondary-color);
    text-decoration: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 60px;
}

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

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.solution-card {
    padding: 40px;
    background: var(--bg-light);
    border-radius: 20px;
    transition: all 0.3s ease;
}

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

.solution-card .icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: 600;
}

.solution-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 核心优势 */
.features {
    background: var(--bg-light);
}

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

.feature-item {
    padding: 35px;
    background: var(--white);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
}

/* 服务流程 */
.process {
    background: var(--white);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    display: inline-block;
    width: 80px;
    height: 80px;
    line-height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: var(--white);
    border-radius: 50%;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 25px;
}

.process-step h3 {
    font-size: 22px;
    margin-bottom: 12px;
    font-weight: 600;
}

.process-step p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 联系我们 */
.contact {
    background: var(--bg-light);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.contact-item {
    text-align: center;
    padding: 40px;
    background: var(--white);
    border-radius: 16px;
}

.contact-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.contact-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

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

/* 页脚 */
.footer {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 40px 0;
}

.footer p {
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 20px;
        font-size: 12px;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .solution-grid,
    .features-grid,
    .process-timeline,
    .contact-info {
        grid-template-columns: 1fr;
    }
}