/* ============================================================
   KCK.CASA — Collections index & detail (2026-09-02)

   背景：此前 pageAssets('collections') 引用了本文件，但文件并不存在（404），
   且 .collection-grid / .collection-card 也从未定义过样式 —— 系列页与系列详情页
   一直是"图片按原始尺寸裸奔"的状态（CLS 高、观感差）。本文件即为补齐。

   方向：Refined European Industrial
     - Fraunces 大标题，Inter 承载规格信息
     - 首张卡片横向跨栏（editorial feature），其余 2×2
     - 页面头图 / 底部 CTA / 规格 chip 已提到共享层 kck-design.css
       （.kck-page-hero / .kck-cta-band / .kck-chip-row），系列页与认证页共用
   ============================================================ */

.kck-collections{ background: var(--kck-bg, #fbfaf7); }

/* ---------------- Series list ---------------- */
.kck-coll-list{ padding: 76px 0 20px; }
.kck-coll-list .container{ max-width: 1200px; }
.kck-coll-grid{
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
}

/* ---------------- Card ---------------- */
.kck-coll-card{
    display: block;
    background: var(--kck-surface, #fff);
    border: 1px solid var(--kck-border, #e6e2d8);
    border-radius: 10px;
    overflow: hidden;
    text-decoration: none;
    transition: transform .4s var(--kck-ease, cubic-bezier(.22,.61,.36,1)),
                box-shadow .4s var(--kck-ease, cubic-bezier(.22,.61,.36,1)),
                border-color .4s var(--kck-ease, cubic-bezier(.22,.61,.36,1));
}
.kck-coll-card:hover{
    transform: translateY(-4px);
    border-color: rgba(212, 168, 67, .5);
    box-shadow: var(--kck-shadow, 0 10px 30px -12px rgba(26, 31, 61, .18));
}
.kck-coll-media{
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--kck-sand, #f4f2ec);
}
.kck-coll-media img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .8s var(--kck-ease, cubic-bezier(.22,.61,.36,1));
}
.kck-coll-card:hover .kck-coll-media img{ transform: scale(1.05); }
.kck-coll-index{
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 11px;
    border-radius: 4px;
    background: rgba(15, 20, 48, .78);
    color: var(--kck-gold, #D4A843);

    font-size: 11px;
    font-weight:var(--fw-semibold);
    letter-spacing: .14em;
    font-variant-numeric: tabular-nums;
    backdrop-filter: blur(4px);
}
.kck-coll-body{ padding: 26px 28px 28px; }
.kck-coll-body h3{

    font-optical-sizing: auto;
    font-weight:var(--fw-semibold);
    font-size: clamp(20px, 1.9vw, 27px);
    line-height: 1.18;
    letter-spacing: -.01em;
    color: var(--kck-navy, #1a1f3d);
    margin: 0 0 10px;
}
.kck-coll-body p{
    font-size: 14.5px;
    line-height: 1.68;
    color: var(--kck-ink-soft, #565b6e);
    margin: 0 0 18px;
}
.kck-coll-meta{
    display: inline-flex;
    align-items: center;
    gap: 8px;

    font-size:var(--fs-xs);
    font-weight:var(--fw-semibold);
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--kck-gold, #D4A843);
}
.kck-coll-meta svg{ transition: transform .3s var(--kck-ease, cubic-bezier(.22,.61,.36,1)); }
.kck-coll-card:hover .kck-coll-meta svg{ transform: translateX(4px); }

/* ---------------- Featured card (横向跨栏，仅索引页首张) ---------------- */
@media (min-width: 992px){
    .kck-coll-card.is-feature{
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: 1.12fr .88fr;
        align-items: stretch;
    }
    .kck-coll-card.is-feature .kck-coll-media{
        aspect-ratio: auto;
        height: 100%;
        min-height: 400px;
    }
    .kck-coll-card.is-feature .kck-coll-body{
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 44px 48px;
    }
    .kck-coll-card.is-feature .kck-coll-body h3{ font-size: clamp(26px, 2.8vw, 38px); }
    .kck-coll-card.is-feature .kck-coll-body p{ font-size: 15.5px; max-width: 44ch; }
}

/* ---------------- Responsive ---------------- */
@media (max-width: 991px){
    .kck-coll-list{ padding: 54px 0 12px; }
}
@media (max-width: 640px){
    .kck-coll-grid{ grid-template-columns: 1fr; gap: 20px; }
    .kck-coll-body{ padding: 22px 22px 24px; }
}

@media (prefers-reduced-motion: reduce){
    .kck-coll-card,
    .kck-coll-media img,
    .kck-coll-meta svg{ transition: none; }
    .kck-coll-card:hover{ transform: none; }
    .kck-coll-card:hover .kck-coll-media img{ transform: none; }
}