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

body {
    font-family: "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background: #ffffff;
    min-height: 100vh;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: white;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

main {
    padding: 30px 0;
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
}

.hero-title {
    font-size: 28px;
    margin-bottom: 10px;
    color: white;
}

.hero-desc {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
}

.section {
    margin-bottom: 35px;
}

.section-title {
    color: #333;
    font-size: 18px;
    margin-bottom: 15px;
    padding-left: 12px;
    border-left: 4px solid #667eea;
    font-weight: 600;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.link-card {
    background: #ffffff;
    border-radius: 10px;
    padding: 14px 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e8e8e8;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

.link-card a {
    text-decoration: none;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    display: block;
}

.link-card:hover a {
    color: #667eea;
}



footer {
    background: #f8f9fa;
    padding: 30px 0;
    margin-top: 30px;
    border-top: 1px solid #e8e8e8;
}

.footer-content {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-links a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

.copyright {
    color: #999;
    font-size: 12px;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-title {
        font-size: 22px;
    }

    .links-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .links-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .link-card {
        padding: 12px 8px;
    }

    .link-card a {
        font-size: 13px;
    }

    .section-title {
        font-size: 16px;
    }
}

.feedback-container {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    max-width: 500px;
    margin: 50px auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    text-align: center;
    border: 1px solid #e8e8e8;
}

.feedback-container h1 {
    margin-bottom: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feedback-info {
    margin-bottom: 30px;
}

.feedback-info p {
    margin-bottom: 10px;
    color: #666;
}

.qr-code {
    margin-top: 20px;
}

.qr-code img {
    width: 200px;
    height: 200px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}