* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            min-height: 100vh;
            padding: 24px 18px;
            background: #f6f8fb;
            color: #172b4d;
            font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', system-ui, sans-serif;
        }
        .catalog-shell {
            width: min(1320px, 100%);
            margin: 0 auto;
            background: #ffffff;
            border: 1px solid #dfe6ee;
            border-radius: 18px;
            padding: 26px 28px 22px;
            box-shadow: 0 14px 34px rgba(23, 43, 77, 0.08);
        }
        .catalog-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 0 2px 16px;
            margin-bottom: 8px;
            border-bottom: 3px solid #1e4d8f;
        }
        .catalog-name {
            min-width: 0;
            display: flex;
            align-items: center;
            gap: 11px;
            color: #173f78;
            font-size: 2rem;
            line-height: 1.22;
            font-weight: 900;
            overflow-wrap: anywhere;
        }
        .catalog-name::before {
            content: '📘';
            flex: 0 0 auto;
            font-size: 1.35rem;
        }
        .catalog-count {
            flex: 0 0 auto;
            padding: 6px 13px;
            border-radius: 999px;
            background: #173f78;
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 800;
            white-space: nowrap;
        }
        .catalog-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            column-gap: 26px;
            row-gap: 0;
        }
        .catalog-item {
            min-width: 0;
            display: grid;
            grid-template-columns: 42px minmax(0, 1fr);
            align-items: center;
            gap: 4px;
            min-height: 46px;
            padding: 8px 3px;
            border-bottom: 1px solid #dfe5ec;
            color: #172b4d;
            text-decoration: none;
            transition: background-color .16s ease, color .16s ease;
        }
        .catalog-item:hover {
            background: #f3f8ff;
            color: #0f4a8a;
        }
        .catalog-no {
            color: #b4232f;
            font-size: 0.9rem;
            font-weight: 900;
            font-variant-numeric: tabular-nums;
        }
        .catalog-title {
            min-width: 0;
            font-size: 1rem;
            line-height: 1.38;
            font-weight: 750;
            overflow-wrap: anywhere;
        }
        .catalog-footer {
            margin-top: 20px;
            padding-top: 14px;
            border-top: 1px solid #e6ebf1;
            text-align: center;
            color: #5d6c7d;
            font-size: 0.92rem;
            line-height: 1.65;
        }
        .catalog-footer a {
            color: #b45309;
            font-weight: 900;
            text-decoration: none;
        }
        .catalog-footer a:hover { color: #92400e; text-decoration: none; }
        @media (max-width: 980px) {
            .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; }
        }
        @media (max-width: 640px) {
            body { padding: 12px 8px; }
            .catalog-shell { padding: 18px 13px 16px; border-radius: 14px; }
            .catalog-head { align-items: flex-start; padding-bottom: 12px; }
            .catalog-name { font-size: 1.48rem; }
            .catalog-count { padding: 5px 10px; font-size: 0.84rem; }
            .catalog-grid { grid-template-columns: 1fr; }
            .catalog-item { min-height: 44px; grid-template-columns: 40px minmax(0, 1fr); padding: 8px 2px; }
            .catalog-title { font-size: 0.98rem; }
        }