:root {
    --ch-bg: #f1f5f9;
    --ch-surface: #ffffff;
    --ch-border: #cbd5e1;
    --ch-text-main: #0f172a;
    --ch-text-sub: #64748b;
    --ch-holo: linear-gradient(90deg, #00f2fe 0%, #4facfe 30%, #f953c6 70%, #ff0844 100%);
    --ch-shadow: 0 4px 20px rgba(15, 23, 42, 0.03);
    --ch-radius: 6px;
}
body { margin: 0; background: var(--ch-bg); color: var(--ch-text-main); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
.ch-header { background: var(--ch-surface); border-bottom: 2px solid var(--ch-border); padding: 16px 0; }
.ch-nav-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-sizing: border-box; }
.ch-logo img { height: 26px; }
.ch-menu { display: flex; gap: 35px; }
.ch-menu a { text-decoration: none; color: var(--ch-text-sub); font-weight: 700; font-size: 14px; text-transform: uppercase; transition: 0.3s; }
.ch-menu a:hover { color: var(--ch-text-main); }
.ch-container { max-width: 1400px; margin: 40px auto; padding: 0 24px; box-sizing: border-box; }
.ch-notice { background: var(--ch-surface); border-radius: var(--ch-radius); border: 1px solid var(--ch-border); padding: 18px 24px; box-shadow: var(--ch-shadow); display: flex; align-items: center; gap: 15px; font-size: 13px; position: relative; overflow: hidden; }
.ch-notice::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--ch-holo); }
.ch-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; }
.ch-card { background: var(--ch-surface); border-radius: var(--ch-radius); padding: 15px; text-decoration: none; position: relative; border: 1px solid var(--ch-border); transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); display: flex; flex-direction: column; height: 100%; box-sizing: border-box; }
.ch-card::before { content: ""; position: absolute; inset: -1px; border-radius: calc(var(--ch-radius) + 1px); background: var(--ch-holo); z-index: -1; opacity: 0; transition: opacity 0.3s; }
.ch-card:hover { transform: translateY(-4px); box-shadow: 0 15px 30px rgba(15, 23, 42, 0.08); border-color: transparent; }
.ch-card:hover::before { opacity: 1; }
.ch-img-box { width: 100%; aspect-ratio: 1; background: #fafbfc; border-radius: 4px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; border: 1px solid #f1f5f9; }
.ch-img-box img { width: 60%; height: 60%; object-fit: contain; filter: grayscale(0.2); transition: 0.3s; }
.ch-card:hover .ch-img-box img { filter: grayscale(0); transform: scale(1.05); }
.ch-name { font-size: 13px; font-weight: 700; color: var(--ch-text-main); height: 38px; line-height: 1.4; overflow: hidden; margin-bottom: 12px; }
.ch-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; border-top: 1px solid #f1f5f9; padding-top: 10px; }
.ch-price { color: #f43f5e; font-weight: 800; font-size: 16px; }
.ch-sell { font-size: 11px; color: var(--ch-text-sub); }
.ch-tag { position: absolute; top: 10px; left: 10px; background: var(--ch-text-main); color: var(--ch-surface); font-size: 9px; padding: 2px 6px; border-radius: 2px; font-weight: bold; }
.ch-detail-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 30px; }
.ch-box { background: var(--ch-surface); border-radius: var(--ch-radius); padding: 35px; border: 1px solid var(--ch-border); box-shadow: var(--ch-shadow); position: relative; }
.ch-box::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--ch-holo); border-radius: var(--ch-radius) var(--ch-radius) 0 0; }
.ch-h1 { font-size: 24px; font-weight: 800; margin: 0 0 20px 0; color: var(--ch-text-main); }
.ch-input { width: 100%; height: 46px; background: #fafbfc; border: 1px solid var(--ch-border); border-radius: 4px; padding: 0 15px; font-size: 14px; box-sizing: border-box; outline: none; transition: 0.3s; margin-top: 8px; color: var(--ch-text-main); }
.ch-input:focus { border-color: var(--ch-text-main); background: var(--ch-surface); }
.ch-label { display: block; font-size: 12px; font-weight: 700; color: var(--ch-text-sub); }
.ch-btn { width: 100%; height: 50px; background: var(--ch-text-main); color: var(--ch-surface); border: none; border-radius: 4px; font-size: 15px; font-weight: 700; cursor: pointer; transition: 0.3s; margin-top: 20px; }
.ch-btn:hover { background: var(--ch-holo); color: #fff; transform: translateY(-1px); }
.ch-footer { background: var(--ch-surface); border-top: 1px solid var(--ch-border); padding: 50px 0; margin-top: 80px; text-align: center; }
@media (max-width: 1400px) { .ch-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1000px) { .ch-grid { grid-template-columns: repeat(3, 1fr); } .ch-detail-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .ch-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }