.container {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 24px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 900px; /* 首页可以更宽一些 */
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    text-align: center;
}

header {
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

p.desc {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 400px;
    margin: 0 auto;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.tool-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 16px;
    padding: 25px;
    text-align: left;
    text-decoration: none;
    color: var(--text-main);
    border: 1px solid #f1f5f9;
    box-shadow: 0 4px 10px rgba(0,0,0,0.04);
    transition: all 0.2s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    line-height: 1;
    color: var(--primary);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .container {
        padding: 30px;
    }
    .tool-grid {
        grid-template-columns: 1fr; /* 移动端单列 */
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }
    h1 {
        font-size: 2rem;
    }
    p.desc {
        font-size: 1rem;
    }
}