:root {
    --yc-bg: #f4f6f9;
    --yc-surface: #ffffff;
    --yc-border: #e2e8f0;
    --yc-navy: #0f172a;
    --yc-gold: #d4af37;
    --yc-gold-dim: rgba(212, 175, 55, 0.15);
    --yc-text-main: #0f172a;
    --yc-text-sub: #475569;
    --yc-price: #ef4444;
    --yc-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
    --yc-radius: 8px;
}
body { margin: 0; background-color: var(--yc-bg); color: var(--yc-text-main); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif; -webkit-font-smoothing: antialiased; }
.yc-header { background-color: var(--yc-surface); border-bottom: 2px solid var(--yc-navy); padding: 18px 0; }
.yc-nav-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-sizing: border-box; }
.yc-logo img { height: 26px; }
.yc-menu { display: flex; gap: 35px; }
.yc-menu a { text-decoration: none; color: var(--yc-text-sub); font-weight: 600; font-size: 14px; transition: 0.3s; text-transform: uppercase; }
.yc-menu a:hover { color: var(--yc-gold); }
.yc-container { max-width: 1400px; margin: 40px auto; padding: 0 24px; box-sizing: border-box; }
.yc-notice { background: var(--yc-surface); border-radius: var(--yc-radius); border: 1px solid var(--yc-border); padding: 18px 24px; box-shadow: var(--yc-shadow); font-size: 13px; color: var(--yc-text-main); line-height: 1.6; display: flex; align-items: center; gap: 12px; }
.yc-notice i { color: var(--yc-gold); font-size: 18px; }
.yc-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 16px; }
.yc-card { background-color: var(--yc-surface); border: 1px solid var(--yc-border); border-radius: var(--yc-radius); padding: 16px; text-decoration: none; transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); box-shadow: var(--yc-shadow); display: flex; flex-direction: column; position: relative; overflow: hidden; }
.yc-card:hover { transform: translateY(-4px); border-color: var(--yc-gold); box-shadow: 0 15px 35px var(--yc-gold-dim); }
.yc-img-box { width: 100%; aspect-ratio: 1; background: #f8fafc; border-radius: 6px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; border: 1px solid var(--yc-border); }
.yc-img-box img { width: 60%; height: 60%; object-fit: contain; opacity: 0.9; transition: 0.3s; }
.yc-card:hover .yc-img-box img { opacity: 1; transform: scale(1.04); }
.yc-name { font-size: 13px; font-weight: 700; color: var(--yc-text-main); height: 38px; line-height: 1.4; overflow: hidden; margin-bottom: 12px; }
.yc-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; border-top: 1px solid #edf2f7; padding-top: 10px; }
.yc-price { color: var(--yc-price); font-weight: 800; font-size: 16px; }
.yc-sell { font-size: 11px; color: var(--yc-text-sub); }
.yc-tag { position: absolute; top: 12px; left: 12px; background: var(--yc-navy); color: var(--yc-surface); font-size: 9px; padding: 2px 6px; border-radius: 4px; font-weight: bold; border: 1px solid var(--yc-gold); }
.yc-detail-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; }
.yc-box { background: var(--yc-surface); border-radius: var(--yc-radius); padding: 35px; border: 1px solid var(--yc-border); box-shadow: var(--yc-shadow); }
.yc-h1 { font-size: 24px; font-weight: 800; margin: 0 0 20px 0; color: var(--yc-text-main); }
.yc-input { width: 100%; height: 46px; background: #f8fafc; border: 1px solid var(--yc-border); border-radius: 8px; padding: 0 15px; font-size: 14px; box-sizing: border-box; outline: none; transition: 0.3s; margin-top: 8px; color: var(--yc-text-main); }
.yc-input:focus { border-color: var(--yc-gold); background: var(--yc-surface); }
.yc-label { display: block; font-size: 12px; font-weight: 700; color: var(--yc-text-sub); }
.yc-btn { width: 100%; height: 50px; background: var(--yc-navy); color: var(--yc-surface); border: none; border-radius: 8px; font-size: 15px; font-weight: 700; cursor: pointer; transition: 0.3s; margin-top: 20px; border: 1px solid var(--yc-gold); }
.yc-btn:hover { background: var(--yc-gold); color: var(--yc-navy); }
.yc-footer { background: var(--yc-surface); border-top: 3px solid var(--yc-navy); padding: 50px 0; margin-top: 80px; text-align: center; }
@media (max-width: 1400px) { .yc-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1000px) { .yc-grid { grid-template-columns: repeat(3, 1fr); } .yc-detail-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .yc-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }