/* ====================================
   响应式设计系统
   ==================================== */

/* ========== 基础响应式工具类 ========== */
.container {
    margin: 0 auto;
    max-width: 1200px;
    padding: 0 var(--space-md);
    width: 100%;
}

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

.flex {
    display: flex;
}

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

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

/* ========== 网格布局系统 ========== */
.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 8rem), 1fr));
}

.grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 8rem), 1fr));
}

/* ========== 超大屏幕 (2xl: 1536px+) ========== */
@media (min-width: 1536px) {
    .container {
        max-width: 1400px;
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
    }

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

/* ========== 大屏幕 (xl: 1280px+) ========== */
@media (min-width: 1280px) and (max-width: 1535px) {
    .container {
        max-width: 1200px;
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(8.5rem, 1fr));
    }
}

/* ========== 桌面端 (lg: 1024px+) ========== */
@media (min-width: 1024px) and (max-width: 1279px) {
    .container {
        max-width: 1000px;
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr));
    }

    .neuro-card {
        min-height: 90px;
    }
}

/* ========== 平板端 (md: 768px+) ========== */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        max-width: 95%;
        padding: 0 var(--space-lg);
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr));
        gap: var(--space-md);
    }

    .neuro-card {
        min-height: 85px;
        padding: var(--space-md) var(--space-sm);
    }

    .category-title {
        font-size: 1.4rem;
        margin: 1.8rem 0 1rem;
    }

    .neuro-nav {
        padding: var(--space-sm);
    }

    .neuro-nav-item {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.95rem;
    }

    /* 导航栏响应式调整 */
    .neuro-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ========== 小平板 (sm: 480px+) ========== */
@media (min-width: 480px) and (max-width: 767px) {
    html {
        font-size: 15px;
    }

    .container {
        max-width: 95%;
        padding: 0 var(--space-md);
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
        gap: var(--space-md);
    }

    .neuro-card {
        min-height: 80px;
        padding: var(--space-md) var(--space-sm);
    }

    .neuro-card i {
        font-size: 1.6rem;
        margin-bottom: var(--space-sm);
    }

    .neuro-card h3 {
        font-size: 0.8rem;
        height: 2.4em;
    }

    .category-title {
        font-size: 1.3rem;
        margin: 1.6rem 0 1rem;
    }

    .neuro-nav-item {
        padding: var(--space-xs) var(--space-md);
        font-size: 0.9rem;
        margin: var(--space-xs);
    }

    /* 导航栏哿应式调整 */
    .neuro-nav .container {
        padding: 0 var(--space-sm);
    }

    .neuro-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-xs);
    }

    header h1 {
        font-size: 1.8rem;
    }
}

/* ========== 手机端 (xs: 360px+) ========== */
@media (min-width: 360px) and (max-width: 479px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--space-sm);
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(6rem, 1fr));
        gap: var(--space-sm);
    }

    .neuro-card {
        min-height: 70px;
        padding: var(--space-sm) var(--space-xs);
    }

    .neuro-card i {
        font-size: 1.4rem;
        margin-bottom: var(--space-xs);
    }

    .neuro-card h3 {
        font-size: 0.75rem;
        height: 2.4em;
        padding: 0 var(--space-xs);
    }

    .category-title {
        font-size: 1.2rem;
        margin: 1.4rem 0 0.8rem;
        padding-left: var(--space-sm);
    }

    .neuro-nav {
        padding: var(--space-xs);
    }

    .neuro-nav-item {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.85rem;
        margin: var(--space-xs);
    }

    /* 导航栏哿应式调整 */
    .neuro-nav .container {
        padding: 0 var(--space-xs);
    }

    .neuro-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 2px;
    }

    .theme-toggle {
        width: 2rem;
        height: 2rem;
    }

    header {
        padding: var(--space-md);
    }

    header h1 {
        font-size: 1.6rem;
    }

    footer {
        padding: var(--space-md);
        font-size: 0.7rem;
    }

    footer nav a {
        margin: 0 var(--space-xs);
        font-size: 0.65rem;
    }
}

/* ========== 超小屏幕 (< 360px) ========== */
@media (max-width: 359px) {
    html {
        font-size: 13px;
    }

    .container {
        padding: 0 var(--space-xs);
    }

    .grid-auto-fit,
    .grid-auto-fill {
        grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
        gap: var(--space-xs);
    }

    .neuro-card {
        min-height: 65px;
        padding: var(--space-sm) var(--space-xs);
    }

    .neuro-card i {
        font-size: 1.3rem;
        margin-bottom: var(--space-xs);
    }

    .neuro-card h3 {
        font-size: 0.7rem;
        height: 2.2em;
        padding: 0 var(--space-xs);
    }

    .category-title {
        font-size: 1.1rem;
        margin: 1.2rem 0 0.6rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .neuro-nav-item {
        padding: var(--space-xs);
        font-size: 0.8rem;
        margin: 2px;
    }

    /* 导航栏哿应式调整 */
    .neuro-nav .container {
        padding: 0 var(--space-xs);
    }

    .neuro-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1px;
    }

    .theme-toggle {
        width: 2rem;
        height: 2rem;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .neuro-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .neuro-button,
    .neuro-nav {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    a {
        text-decoration: underline;
    }

    .no-print {
        display: none;
    }
}

/* ========== 减少动画偏好 ========== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .neuro-card:hover {
        transform: none;
    }
}