/* --- 分类模块 --- */
.categories {
    padding: 100px 32px;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    position: relative;
}

.cat-grid {
    max-width: 1152px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 64px;
    position: relative;
    z-index: 10;
}

@media (min-width: 768px) {
    .cat-grid { grid-template-columns: repeat(3, 1fr); }
}

.cat-card {
    display: block;
    color: inherit;
    text-decoration: none;
    position: relative;
    transition: transform 0.5s ease;
}

.cat-card:hover { transform: translateY(-4px); }

/* --- 分类印章 --- */
.cat-seal {
    position: absolute;
    top: 0;
    right: 0;
    width: 36px;
    height: 36px;
    border: 1.5px solid var(--accent-seal);
    color: var(--accent-seal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-brush);
    font-size: 18px;
    line-height: 1;
    padding-top: 2px;
    opacity: 0.72;
    transform: rotate(-6deg);
    mix-blend-mode: multiply;
    box-shadow: inset 0 0 0 1px var(--accent-seal-faint);
    transition: opacity 0.5s ease, transform 0.5s ease;
    user-select: none;
}
.cat-seal::after {
    content: '';
    position: absolute;
    inset: 2px;
    border: 1px solid var(--accent-seal-tint);
}
.cat-card:hover .cat-seal {
    opacity: 0.95;
    transform: rotate(-3deg);
}

.cat-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    color: var(--ink-pale);
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    transition: all 0.5s ease;
}

.cat-card:hover .cat-icon {
    color: var(--ink-heavy);
    border-bottom-color: var(--ink-heavy);
}

.cat-title-wrap {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}

.cat-title {
    font-family: var(--font-brush);
    font-size: 26px;
    letter-spacing: 0.15em;
    font-weight: 400;
    color: var(--ink-dark);
}

.cat-label {
    font-size: 9px;
    color: var(--ink-pale);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: bold;
}

.cat-desc {
    font-size: 14px;
    color: var(--ink-light);
    font-family: var(--font-serif);
    opacity: 0.9;
    line-height: 1.8;
}

/* --- 长期主题 / Thought Trails --- */
.trails {
    padding: 110px 32px;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    position: relative;
}
.trails-container {
    max-width: 1152px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}
.trails-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
}
@media (min-width: 720px) {
    .trails-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (min-width: 1024px) {
    .trails-grid { grid-template-columns: repeat(4, 1fr); }
}

.trail-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 32px 26px 30px;
    border: 1px solid var(--border-color);
    color: inherit;
    text-decoration: none;
    transition: border-color 0.5s ease, transform 0.5s ease, background-color 0.5s ease;
    background: var(--surface-overlay-soft);
    position: relative;
    overflow: hidden;
    min-width: 0;
}
.trail-card:hover {
    border-color: var(--ink-faint);
    transform: translateY(-3px);
    background: var(--surface-overlay-hover);
}
.trail-card-en {
    font-size: 10px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--ink-pale);
    font-weight: bold;
}
.trail-card-title {
    font-family: var(--font-brush);
    font-size: 28px;
    letter-spacing: 0.16em;
    color: var(--ink-dark);
    font-weight: 400;
    margin: 0;
    line-height: 1.3;
}
.trail-card-desc {
    font-family: var(--font-serif);
    font-size: 14px;
    line-height: 1.85;
    color: var(--ink-light);
    margin: 0;
}
.trail-card-link {
    margin-top: auto;
    font-size: 10px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--ink-medium);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: color 0.4s ease, letter-spacing 0.4s ease;
}
.trail-card-link::after {
    content: '';
    display: inline-block;
    width: 28px;
    height: 1px;
    background: var(--border-color);
    transition: width 0.4s ease, background 0.4s ease;
}
.trail-card:hover .trail-card-link {
    color: var(--ink-heavy);
    letter-spacing: 0.42em;
}
.trail-card:hover .trail-card-link::after {
    width: 44px;
    background: var(--ink-heavy);
}

@media (max-width: 767px) {
    .categories {
        padding-left: 24px;
        padding-right: 24px;
        padding-top: 84px;
        padding-bottom: 84px;
    }
    .cat-grid {
        gap: 44px;
    }

    .trails {
        padding-left: 24px;
        padding-right: 24px;
        padding-top: 78px;
        padding-bottom: 78px;
    }
    .trail-card { padding: 26px 22px; }
    .trail-card-title { font-size: 24px; }
}