/* ============================================
   布局系统 — 容器、网格、Section
   ============================================ */

/* === 容器 === */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* === Section === */
.section {
    position: relative;
    padding: var(--section-padding) 0;
    overflow: hidden;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-lg);
    padding: var(--space-xs) var(--space-lg);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
    background: rgba(6, 182, 212, 0.05);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.section-title .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* === Bento 网格 === */
.bento-grid {
    display: grid;
    gap: var(--space-lg);
}

.bento-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.bento-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.bento-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 跨列 */
.col-span-2 {
    grid-column: span 2;
}

.col-span-3 {
    grid-column: span 3;
}

.row-span-2 {
    grid-row: span 2;
}

/* === Flex 工具类 === */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-center {
    align-items: center;
    justify-content: center;
}

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

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

.gap-xl {
    gap: var(--space-xl);
}

/* === 分割线 === */
.divider {
    width: 100%;
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-3xl) 0;
}

/* === 响应式网格 === */
@media (max-width: 1024px) {
    .bento-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .bento-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {

    .bento-grid-2,
    .bento-grid-3,
    .bento-grid-4 {
        grid-template-columns: 1fr;
    }

    .col-span-2,
    .col-span-3 {
        grid-column: span 1;
    }
}