body{
    padding-top: 60px;
    background: #f0f0f0;
}

.welcome-container {
    max-width: 800px;
    margin: 20px auto 20px;
    padding: 30px 25px 20px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

/* 标题区 */
.welcome-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.welcome-header h1 {
    font-size: 28px;
    color: #2c3e50;
    margin: 0 0 6px 0;
}

.welcome-subtitle {
    font-size: 15px;
    color: #999;
    margin: 0;
    letter-spacing: 2px;
}

/* 联系卡片网格 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 20px 22px;
    background: #f8f9fa;
    border-radius: 12px;
    text-decoration: none;
    color: #333;
    transition: all 0.25s ease;
    border: 2px solid transparent;
}

.contact-card:hover {
    background: #ffffff;
    border-color: #007BFF;
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.12);
    transform: translateY(-4px);
}

.contact-icon {
    font-size: 42px;
    margin-bottom: 10px;
}

.contact-name {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 4px;
}

.contact-desc {
    font-size: 13px;
    color: #999;
    margin-bottom: 12px;
}

.contact-btn {
    font-size: 14px;
    font-weight: 500;
    color: #007BFF;
    background: transparent;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s;
}

.contact-card:hover .contact-btn {
    border-bottom-color: #007BFF;
}

/* ===== 移动端适配 ===== */
@media (max-width: 600px) {
    .welcome-container {
        margin: 3px 12px 12px;
        padding: 20px 16px 16px;
    }

    .welcome-header h1 {
        font-size: 22px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .contact-card {
        padding: 20px 16px 18px;
    }

    .contact-icon {
        font-size: 34px;
    }
}