/** Morandi Colors Enhanced for Card UI **/
:root {
    /* Backgrounds - 更浅的莫兰迪底色 */
    --bg-primary: #f9f6f1;
    --bg-primary-soft: #fcf9f6;
    --bg-card: #ffffff;
    --bg-card-soft: #fcfaf8;
    --bg-section: #f5f1ea;
    --bg-section-soft: #f9f5f0;
    --bg-hover: #f1ece3;

    /* Text colors - 不同层次的灰棕 */
    --text-primary: #5a544b;
    --text-secondary: #7d7569;
    --text-light: #a09687;
    --text-lightest: #c6bcb2;

    /* Accent colors - 莫兰迪低饱和暖色调 */
    --accent-main: #bfb6ad;
    --accent-main-soft: #d4ccc5;
    --accent-hover: #a5978a;
    --accent-active: #8f7f70;
    --accent-subtle: #e3d8ce;
    --accent-subtle-soft: #f1eae4;

    /* Border colors */
    --border-light: #e6ddd3;
    --border-light-soft: #f2ede6;
    --border-medium: #d8d0c7;

    /* Shadows - 柔和自然阴影 */
    --shadow-card: rgba(138, 135, 128, 0.08);
    --shadow-card-subtle: rgba(138, 135, 128, 0.04);
    --shadow-hover: rgba(138, 135, 128, 0.12);
    --shadow-image: rgba(0, 0, 0, 0.05);
    --shadow-image-soft: rgba(0, 0, 0, 0.03);

    /* Spacing system */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Card sizes */
    --card-min-width: 160px;
    --card-max-width: 220px;
    --card-icon-size: 64px;
    --card-icon-size-sm: 48px;

    /* Typography */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
}

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

*:focus-visible {
    outline: 2px solid var(--accent-subtle);
    outline-offset: 2px;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Header Navigation */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(249, 246, 241, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light-soft);
    box-shadow: 0 2px 12px rgba(138, 135, 128, 0.06);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
}

/*.logo {*/
/*    font-size: 22px;*/
/*    font-weight: 600;*/
/*    color: var(--text-primary);*/
/*    letter-spacing: 0.5px;*/
/*}*/

.nav-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-link {
    padding: 8px 16px;
    font-size: 18px;
    font-weight: bold;
    color: var(--text-secondary);
    border-radius: 20px;
    transition: all 0.2s ease;
    white-space: nowrap;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-link.active {
    color: var(--bg-card);
    background: var(--accent-main);
    border-color: var(--accent-main);
}

.main-title {
    text-align: center;
    padding-top: 30px;
    margin-bottom: var(--space-2xl);
    position: relative;
}

.main-title .site-logo {
    position: absolute;
    top: 10px;
    left: 51%;
    transform: translateX(-50%);
    font-size: 50px;
    font-weight: 800;
    letter-spacing: 2px;
}

.main-title .site-logo .logo-ai {
    color: #5a544b;
}

.main-title .site-logo .logo-num {
    color: #c9a6a6;
}

.main-title .site-logo .logo-other {
    color: #dcc0c0;
    font-size: 20px;
}

.main-title h1 {
    font-size: 30px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.main-title p {
    font-size: 18px;
    color: var(--text-secondary);
}

/* Grid Layout System -------------------------------------------------- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
}

section {
    margin-bottom: var(--space-3xl);
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-primary);
    margin: 0;
    padding: 0 var(--space-lg);
    border-left: 4px solid var(--accent-main);
    background: var(--bg-section);
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    min-width: 180px;
}

.section-count {
    margin-left: auto;
    font-size: 14px;
    color: var(--text-light);
    background: var(--bg-card);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

/* Cards Grid -------------------------------------------------- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

/* Card与其微妙的渐变 ...*/
.card {
    position: relative;
    /*background: var(--bg-card);*/
    background: linear-gradient(135deg, var(--bg-card-soft), var(--bg-card));
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
    rgba(191, 182, 173, 0) 0%,
    rgba(163, 151, 138, 0.04) 100%);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow-hover);
    border-color: var(--accent-hover);
}

.card:hover::before {
    opacity: 1;
}

.card-href {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.card-icon {
    width: var(--card-icon-size);
    height: var(--card-icon-size);
    margin: 0 auto var(--space-lg);
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 8px var(--shadow-image);
    transition: transform 0.25s ease;
    padding: 12px;
    background: rgba(191, 182, 173, 0.08);
}

.card:hover .card-icon {
    transform: scale(1.05);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
    height: 50px; /* 对齐到三行文字高 */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    gap: var(--space-xs);
}

.card-tag {
    font-size: 12px;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    background: var(--accent-subtle);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-tag_china {
    background: #a67c7c;
    color: #f5f2ed;
    font-weight: 600;
}

.card-tag_global {
    background: #5d7a8a;
    color: #f5f2ed;
    font-weight: 600;
}

/* Responsive Grid -------------------------------------------------- */

/* 大屏幕：6列 */
@media (min-width: 1200px) {
    .cards-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* 中等屏幕：4-5列 */
@media (max-width: 1199px) and (min-width: 900px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
        max-width: 900px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* 小屏：3列 */
@media (max-width: 899px) and (min-width: 640px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }
}

/* 移动端：2列 */
@media (max-width: 639px) {
    .cards-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }

    .card {
        padding: var(--space-lg);
    }

    .card-icon {
        width: var(--card-icon-size-sm);
        height: var(--card-icon-size-sm);
    }

    .card-title {
        font-size: 13px;
    }

    .card-desc {
        font-size: 11px;
        height: 44px; /* 两行高 */
        -webkit-line-clamp: 2;
    }
}

/* 极窄移动端：单栏 */
@media (max-width: 380px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }
}

/* Footer -------------------------------------------------- */
.footer {
    background: var(--bg-section);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border-light);
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    text-align: center;
    font-size: 12px;
    color: var(--text-light);
}

/* Utilities */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* Print Styles */
@media print {
    .header,
    .footer {
        display: none !important;
    }

    .card {
        page-break-inside: avoid;
    }

    .card-desc {
        display: none;
    }

    .card-icon {
        width: var(--card-icon-size-sm);
        height: var(--card-icon-size-sm);
    }
}

/* Hover effects for large screens only (非触摸设备） */
@media (hover: hover) and (pointer: fine) {
    .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 24px var(--shadow-hover);
    }
}

/* Scrollbar --------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-main);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* 页面滚动动画 */
@media (prefers-reduced-motion: no-preference) {
    section {
        animation: fadeInSection 0.6s ease-out;
    }

    @keyframes fadeInSection {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    .card {
        animation: fadeInCard 0.6s ease-out forwards;
        opacity: 0;
        animation-delay: calc(var(--i, 0) * 0.05s);
    }

    @keyframes fadeInCard {
        to {
            opacity: 1;
        }
    }
}


/*.underline-text {*/
/*    !*text-decoration: underline wavy;*!*/
/*    font-weight: bold;*/
/*    font-style: italic;*/
/*}*/


.tool-section {
    scroll-margin-top: 230px;
}