:root {
    --bt-bg: #060112;
    --bt-surface: #110926;
    --bt-border: #1f143a;
    --bt-accent: #cbff00;
    --bt-neon-pink: #ec4899;
    --bt-text-main: #f5f3ff;
    --bt-text-sub: #7c6ca7;
    --bt-price: #cbff00;
    --bt-shadow: 0 4px 12px rgba(0, 0, 0, 0.6);
    --bt-radius: 4px;
}
body { margin: 0; background-color: var(--bt-bg); color: var(--bt-text-main); font-family: "JetBrains Mono", Consolas, -apple-system, BlinkMacSystemFont, sans-serif; -webkit-font-smoothing: antialiased; }
.bt-header { background-color: var(--bt-surface); border-bottom: 2px solid var(--bt-accent); padding: 18px 0; }
.bt-nav-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-sizing: border-box; }
.bt-logo img { height: 26px; filter: invert(1) drop-shadow(0 0 4px var(--bt-accent)); }
.bt-menu { display: flex; gap: 35px; }
.bt-menu a { text-decoration: none; color: var(--bt-text-sub); font-weight: 700; font-size: 14px; transition: 0.3s; }
.bt-menu a:hover { color: var(--bt-accent); }
.bt-container { max-width: 1400px; margin: 40px auto; padding: 0 24px; box-sizing: border-box; }
.bt-notice { background: var(--bt-surface); border-radius: var(--bt-radius); border: 1px solid var(--bt-border); padding: 18px 24px; box-shadow: var(--bt-shadow); font-size: 13px; color: var(--bt-text-main); line-height: 1.6; display: flex; align-items: center; gap: 12px; position: relative; }
.bt-notice i { color: var(--bt-accent); font-size: 18px; }
.bt-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; }
.bt-card { background-color: var(--bt-surface); border: 1px solid var(--bt-border); border-radius: var(--bt-radius); padding: 16px; text-decoration: none; transition: all 0.25s ease-in-out; box-shadow: var(--bt-shadow); display: flex; flex-direction: column; position: relative; overflow: hidden; }
.bt-card:hover { transform: translateY(-3px); border-color: var(--bt-neon-pink); box-shadow: 0 10px 25px rgba(236, 72, 153, 0.2); }
.bt-img-box { width: 100%; aspect-ratio: 1; background: #03000a; border-radius: 2px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; border: 1px solid #1c1335; }
.bt-img-box img { width: 60%; height: 60%; object-fit: contain; opacity: 0.85; transition: 0.3s; }
.bt-card:hover .bt-img-box img { opacity: 1; transform: scale(1.04); }
.bt-name { font-size: 13px; font-weight: 700; color: var(--bt-text-main); height: 38px; line-height: 1.4; overflow: hidden; margin-bottom: 12px; }
.bt-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; border-top: 1px solid #1f143a; padding-top: 10px; }
.bt-price { color: var(--bt-accent); font-weight: 800; font-size: 16px; }
.bt-sell { font-size: 11px; color: var(--bt-text-sub); }
.bt-tag { position: absolute; top: 12px; left: 12px; background: var(--bt-accent); color: #000; font-size: 10px; padding: 2px 6px; border-radius: 2px; font-weight: bold; }
.bt-detail-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; }
.bt-box { background: var(--bt-surface); border-radius: var(--bt-radius); padding: 35px; border: 1px solid var(--bt-border); box-shadow: var(--bt-shadow); }
.bt-h1 { font-size: 24px; font-weight: 800; margin: 0 0 20px 0; color: var(--bt-text-main); border-bottom: 1px solid var(--bt-border); padding-bottom: 12px; }
.bt-input { width: 100%; height: 46px; background: #03000a; border: 1px solid var(--bt-border); border-radius: 4px; padding: 0 15px; font-size: 14px; box-sizing: border-box; outline: none; transition: 0.3s; margin-top: 8px; color: var(--bt-text-main); }
.bt-input:focus { border-color: var(--bt-accent); background: var(--bt-surface); }
.bt-label { display: block; font-size: 12px; font-weight: 700; color: var(--bt-text-sub); }
.bt-btn { width: 100%; height: 50px; background: var(--bt-accent); color: #000; border: none; border-radius: 4px; font-size: 15px; font-weight: 700; cursor: pointer; transition: 0.3s; margin-top: 20px; }
.bt-btn:hover { background: #fff; color: #000; box-shadow: 0 0 15px var(--bt-accent); }
.bt-footer { background: var(--bt-surface); border-top: 2px solid var(--bt-accent); padding: 50px 0; margin-top: 80px; text-align: center; }
@media (max-width: 1400px) { .bt-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1000px) { .bt-grid { grid-template-columns: repeat(3, 1fr); } .bt-detail-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .bt-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }