:root {
    --dat-bg: #070914;
    --dat-card-bg: #0d1122;
    --dat-border: rgba(0, 255, 102, 0.2);
    --dat-border-hover: rgba(0, 255, 102, 0.7);
    --dat-text: #e2e8f0;
    --dat-sub: #64748b;
    --dat-accent: #00ff66;
    --dat-font: 'Courier New', Courier, monospace;
}

body {
    margin: 0; background: var(--dat-bg); color: var(--dat-text);
    font-family: var(--dat-font); font-size: 13px; -webkit-font-smoothing: antialiased;
}

.dat-header {
    position: fixed; top: 0; width: 100%; height: 56px;
    background: rgba(7, 9, 20, 0.95); backdrop-filter: blur(8px);
    z-index: 2000; border-bottom: 1px solid var(--dat-border);
}

.dat-inner {
    max-width: 1200px; margin: 0 auto; height: 100%;
    display: flex; align-items: center; justify-content: space-between; padding: 0 20px;
}

.dat-logo-nav { display: flex; align-items: center; gap: 30px; }
.dat-logo img { height: 20px; }
.dat-nav { display: flex; list-style: none; gap: 24px; margin: 0; padding: 0; }
.dat-nav a { color: var(--dat-sub); text-decoration: none; font-weight: 500; }
.dat-nav a:hover, .dat-nav a.active { color: var(--dat-accent); }
.dat-user-zone { display: flex; align-items: center; gap: 16px; }
.dat-btn-login { background: var(--dat-accent); color: #000; padding: 6px 12px; border-radius: 4px; text-decoration: none; font-size: 12px; font-weight: bold; }
.dat-avatar { width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--dat-border); }
.dat-m-trigger { display: none; color: var(--dat-text); font-size: 20px; cursor: pointer; }

/* 留白通告 */
.dat-notice-bar { margin: 80px auto 20px; max-width: 1200px; padding: 0 20px; }
.dat-notice-inner { border: 1px solid var(--dat-border); padding: 12px 20px; background: var(--dat-card-bg); display: flex; align-items: center; }
.dat-notice-dot { width: 6px; height: 6px; background: var(--dat-accent); border-radius: 50%; margin-right: 12px; }

/* 页脚 */
.dat-footer { padding: 40px 0; background: #04050a; border-top: 1px solid var(--dat-border); margin-top: 60px; }
.dat-footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.dat-copyright { font-size: 11px; color: var(--dat-sub); display: flex; align-items: center; }
.dat-status-indicator { width: 6px; height: 6px; background: var(--dat-accent); border-radius: 50%; margin-right: 10px; }

/* 布局 522: 左侧纬度指示尺 ➡️ 右侧双列双轴坐标网格定位商品卡 */
.dat-home-wrap { max-width: 1200px; margin: 40px auto; padding: 0 20px; min-height: 80vh; }
.dat-split-grid { display: flex; gap: 40px; }

/* 左侧纬度指示尺 */
.dat-left-scale {
    flex: 0.25; border-right: 2px dashed var(--dat-border); padding-right: 25px;
    display: flex; flex-direction: column; justify-content: space-between;
    height: 380px; position: sticky; top: 100px; font-weight: bold;
}
.dat-scale-tick { display: flex; justify-content: space-between; color: var(--dat-accent); font-size: 11px; }
.dat-scale-tick::after { content: " |"; color: var(--dat-border); }

.dat-right-grid { flex: 1.75; }

.dat-cat-hd { font-size: 14px; font-weight: 600; color: var(--dat-text); margin: 30px 0 20px; display: flex; align-items: center; }
.dat-cat-hd::after { content: ""; flex: 1; height: 1px; background: var(--dat-border); margin-left: 20px; }
.dat-cat-hd::before { content: "▣ "; color: var(--dat-accent); margin-right: 8px; }

.dat-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.dat-card-probe { display: block; background: var(--dat-card-bg); text-decoration: none; transition: 0.3s; padding: 24px; position: relative; border: 1px solid var(--dat-border); }
.dat-card-probe:hover { border-color: var(--dat-accent); box-shadow: 0 0 15px rgba(0, 255, 102, 0.2); }
.dat-card-probe:hover .dat-name { color: var(--dat-accent); }
.dat-img-box { width: 100%; aspect-ratio: 1.8; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; background: #04050a; }
.dat-img-box img { width: 45%; height: 45%; object-fit: contain; }
.dat-name { font-size: 14px; height: 38px; color: var(--dat-text); line-height: 1.5; overflow: hidden; margin-bottom: 15px; }
.dat-footer-meta { display: flex; justify-content: space-between; align-items: center; }
.dat-price { font-size: 16px; font-weight: 700; color: var(--dat-accent); }
.dat-sell-count { font-size: 11px; color: var(--dat-sub); }
.dat-tag-auto { position: absolute; top: 10px; right: 10px; font-size: 9px; color: var(--dat-accent); border: 1px solid var(--dat-accent); padding: 1px 4px; }

/* Detail Pages */
.dat-trade-wrap { padding: 40px 10px; min-height: 80vh; }
.dat-trade-node { max-width: 900px; margin: 0 auto; border: 1px solid var(--dat-border); display: flex; flex-wrap: wrap; background: var(--dat-card-bg); }
.dat-media-side { flex: 0 0 32%; background: #04050a; padding: 30px; display: flex; align-items: center; border-right: 1px solid var(--dat-border); }
.dat-media-side img { width: 100%; height: auto; }
.dat-form-side { flex: 1; padding: 40px; min-width: 320px; }
.dat-title { font-size: 22px; font-weight: 700; color: var(--dat-text); margin-bottom: 10px; }
.dat-tag-status { display: inline-block; padding: 3px 8px; border: 1px solid var(--dat-accent); color: var(--dat-accent); font-size: 11px; background: rgba(0, 255, 102, 0.1); margin-bottom: 25px; }
.dat-price-node { margin-bottom: 30px; padding: 20px; background: var(--dat-bg); border: 1px solid var(--dat-border); display: flex; justify-content: space-between; align-items: center; }
.dat-price-val { font-size: 26px; font-weight: 800; color: var(--dat-accent); }
.dat-field { margin-bottom: 20px; }
.dat-label { display: block; font-size: 11px; color: var(--dat-sub); margin-bottom: 8px; }
.dat-input { width: 100%; height: 44px; background: var(--dat-bg); border: 1px solid var(--dat-border); color: var(--dat-text); padding: 0 15px; box-sizing: border-box; outline: none; }
.dat-input:focus { border-color: var(--dat-accent); }
.dat-btn-submit { width: 100%; height: 48px; background: var(--dat-accent); color: #000; border: none; cursor: pointer; font-size: 14px; font-weight: 700; transition: 0.3s; }
.dat-btn-submit:hover { opacity: 0.8; }
.dat-btn-submit:disabled { background: #132219; color: #435b4c; border: 1px solid var(--dat-border); cursor: not-allowed; }
.dat-desc-box { max-width: 900px; margin: 20px auto 0; border: 1px solid var(--dat-border); padding: 30px; background: var(--dat-card-bg); color: var(--dat-sub); }
.dat-desc-title { font-size: 12px; font-weight: 700; color: var(--dat-text); margin-bottom: 15px; border-left: 2px solid var(--dat-accent); padding-left: 10px; }

/* Queries & Lists */
.dat-query-wrap { max-width: 520px; margin: 80px auto; padding: 0 20px; min-height: 70vh; }
.dat-query-node { background: var(--dat-card-bg); border: 1px solid var(--dat-border); padding: 30px; margin-bottom: 20px; }
.dat-btn-prime { background: var(--dat-accent); color: #000; border: none; padding: 12px 30px; font-weight: 700; font-size: 13px; cursor: pointer; width: 100%; }

@media (max-width: 768px) {
    .dat-split-grid { flex-direction: column; }
    .dat-left-scale { display: none; }
    .dat-grid-2 { grid-template-columns: repeat(2, 1fr); }
    .dat-header { position: relative; }
    .dat-nav { position: fixed; top: 56px; left: -100%; width: 100%; height: 100vh; background: var(--dat-bg); flex-direction: column; padding: 40px; transition: 0.3s; gap: 30px; }
    .dat-nav.is-open { left: 0; }
    .dat-m-trigger { display: block; }
}