:root {
    --oc-bg: #e0f2fe;
    --oc-surface: #ffffff;
    --oc-border: #bae6fd;
    --oc-accent: #0284c7;
    --oc-citrus: #f59e0b;
    --oc-price: #ef4444;
    --oc-text-main: #0f172a;
    --oc-text-sub: #0369a1;
    --oc-shadow: 0 10px 30px rgba(2, 132, 199, 0.04);
    --oc-shadow-hover: 0 20px 40px rgba(2, 132, 199, 0.12);
    --oc-radius: 16px;
    --oc-radius-sm: 8px;
}
body { margin: 0; background-color: var(--oc-bg); color: var(--oc-text-main); font-family: "PingFang SC", "STHeiti", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
.oc-header { background-color: var(--oc-surface); border-bottom: 2px solid var(--oc-border); padding: 18px 0; }
.oc-nav-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-sizing: border-box; }
.oc-logo img { height: 26px; filter: grayscale(1) contrast(1.1) brightness(0.9); }
.oc-menu { display: flex; gap: 35px; }
.oc-menu a { text-decoration: none; color: var(--oc-text-sub); font-weight: 600; font-size: 14px; transition: 0.3s; }
.oc-menu a:hover { color: var(--oc-accent); }
.oc-container { max-width: 1400px; margin: 40px auto; padding: 0 24px; box-sizing: border-box; }
.oc-notice { background: var(--oc-surface); border-radius: var(--oc-radius); border: 1px solid var(--oc-border); padding: 18px 24px; box-shadow: var(--oc-shadow); font-size: 13px; color: var(--oc-text-main); line-height: 1.6; display: flex; align-items: center; gap: 12px; }
.oc-notice i { color: var(--oc-accent); font-size: 18px; }
.oc-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 16px; }
.oc-card { background-color: var(--oc-surface); border: 1px solid var(--oc-border); border-radius: var(--oc-radius); padding: 16px; text-decoration: none; transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); box-shadow: var(--oc-shadow); display: flex; flex-direction: column; position: relative; overflow: hidden; }
.oc-card:hover { transform: translateY(-4px); border-color: var(--oc-accent); box-shadow: var(--oc-shadow-hover); }
.oc-img-box { width: 100%; aspect-ratio: 1; background: #fafbfc; border-radius: var(--oc-radius-sm); display: flex; align-items: center; justify-content: center; margin-bottom: 12px; border: 1px solid #f1f5f9; }
.oc-img-box img { width: 60%; height: 60%; object-fit: contain; opacity: 0.85; transition: 0.3s; }
.oc-card:hover .oc-img-box img { opacity: 1; transform: scale(1.04); }
.oc-name { font-size: 13px; font-weight: 700; color: var(--oc-text-main); height: 38px; line-height: 1.4; overflow: hidden; margin-bottom: 12px; }
.oc-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; border-top: 1px solid #edf2f7; padding-top: 10px; }
.oc-price { color: var(--oc-price); font-weight: 800; font-size: 16px; }
.oc-sell { font-size: 11px; color: var(--oc-text-sub); }
.oc-tag { position: absolute; top: 12px; left: 12px; background: rgba(2, 132, 199, 0.1); color: var(--oc-accent); font-size: 10px; padding: 2px 6px; border-radius: 4px; font-weight: bold; border: 1px solid var(--oc-accent); }
.oc-detail-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; }
.oc-box { background: var(--oc-surface); border-radius: var(--oc-radius); padding: 35px; border: 1px solid var(--oc-border); box-shadow: var(--oc-shadow); }
.oc-h1 { font-size: 24px; font-weight: 800; margin: 0 0 20px 0; color: var(--oc-text-main); }
.oc-input { width: 100%; height: 46px; background: #fafbfc; border: 1px solid var(--oc-border); border-radius: 8px; padding: 0 15px; font-size: 14px; box-sizing: border-box; outline: none; transition: 0.3s; margin-top: 8px; color: var(--oc-text-main); }
.oc-input:focus { border-color: var(--oc-accent); background: var(--oc-surface); }
.oc-label { display: block; font-size: 12px; font-weight: 700; color: var(--oc-text-sub); }
.oc-btn { width: 100%; height: 50px; background: var(--oc-accent); color: var(--oc-surface); border: none; border-radius: 8px; font-size: 15px; font-weight: 700; cursor: pointer; transition: 0.3s; margin-top: 20px; }
.oc-btn:hover { background: var(--oc-citrus); color: var(--oc-surface); }
.oc-footer { background: var(--oc-surface); border-top: 1px solid var(--oc-border); padding: 50px 0; margin-top: 80px; text-align: center; }
@media (max-width: 1400px) { .oc-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1000px) { .oc-grid { grid-template-columns: repeat(3, 1fr); } .oc-detail-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .oc-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }