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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #eee;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a1a;
    letter-spacing: 1px;
}

.nav a {
    margin-left: 32px;
    color: #555;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s;
}

.nav a:hover {
    color: #0066cc;
}

/* Hero */
.hero {
    padding: 120px 0;
    text-align: center;
    background: linear-gradient(135deg, #f8f9fc 0%, #eef2f7 100%);
}

.hero h2 {
    font-size: 36px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 16px;
}

.hero .subtitle {
    font-size: 18px;
    color: #666;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-alt {
    background: #fafbfc;
}

.section h3 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #1a1a1a;
    text-align: center;
}

.section p {
    color: #555;
    font-size: 16px;
    text-align: center;
    max-width: 720px;
    margin: 0 auto 12px;
}

/* Services */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.service-item {
    background: #fff;
    padding: 32px 24px;
    border-radius: 8px;
    border: 1px solid #eee;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.service-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.service-item h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #1a1a1a;
}

.service-item p {
    font-size: 14px;
    color: #666;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: #aaa;
    padding: 32px 0;
    text-align: center;
    font-size: 14px;
}

.footer p {
    margin: 4px 0;
}

.footer a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Responsive */
@media (max-width: 640px) {
    .nav a {
        margin-left: 16px;
        font-size: 14px;
    }

    .hero {
        padding: 80px 0;
    }

    .hero h2 {
        font-size: 26px;
    }

    .section {
        padding: 60px 0;
    }
}