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

:root {
    --primary-blue: #4A90D9;
    --light-blue: #E8F4FD;
    --warm-blue: #2E5C8A;
    --text-dark: #333;
    --text-light: #666;
    --white: #fff;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    background: linear-gradient(180deg, #E8F4FD 0%, #fff 100%);
    min-height: 100vh;
}

header {
    background: var(--white);
    box-shadow: 0 2px 20px rgba(74, 144, 217, 0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--warm-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.logo-text {
    font-size: 24px;
    font-weight: 600;
    color: var(--warm-blue);
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 30px;
    font-size: 15px;
    transition: color 0.3s;
}

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

.hero {
    padding: 80px 0;
    text-align: center;
}

.hero-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-blue), var(--warm-blue));
    border-radius: 50%;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    box-shadow: 0 10px 40px rgba(74, 144, 217, 0.3);
}

.hero h1 {
    font-size: 42px;
    color: var(--warm-blue);
    margin-bottom: 16px;
}

.hero p {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.tagline {
    display: inline-block;
    background: var(--light-blue);
    color: var(--primary-blue);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    margin-top: 20px;
}

.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 28px;
    color: var(--warm-blue);
    margin-bottom: 40px;
}

.about {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 4px 30px rgba(74, 144, 217, 0.08);
}

.about p {
    color: var(--text-light);
    font-size: 16px;
    line-height: 2;
}

.about .highlight {
    color: var(--primary-blue);
    font-weight: 500;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.feature-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.06);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(74, 144, 217, 0.12);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--light-blue);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 18px;
    color: var(--warm-blue);
    margin-bottom: 12px;
}

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

.services {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: linear-gradient(135deg, var(--primary-blue), var(--warm-blue));
    border-radius: 16px;
    padding: 30px;
    color: var(--white);
    text-align: center;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.service-card p {
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.8;
}

.service-card .phase {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    margin-bottom: 16px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.stat-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.06);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

footer {
    background: var(--warm-blue);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

footer p {
    opacity: 0.9;
    font-size: 14px;
}

footer .brand {
    font-size: 20px;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .features,
    .services,
    .stats {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 28px;
    }

    nav {
        display: none;
    }
}