/* blueprint-sheet · 图纸 —— 蓝图底、白色图纸、标题栏格子贯穿全站 */
:root {
    --bp-blue: #16467e;
    --bp-grid: #2a5c97;
    --bp-sheet: #ffffff;
    --bp-line: #2c6bb0;
    --bp-ink: #0f2340;
    --bp-soft: #46597a;
    --bp-red: #c8323f;
    --bp-on-blue: #e8f1fb;
    --bp-display: "Red Hat Display", system-ui, -apple-system, "Segoe UI", sans-serif;
    --bp-body: "Red Hat Text", system-ui, -apple-system, "Segoe UI", sans-serif;
    --pagination-accent: #16467e;
}

body.theme-blueprint {
    margin: 0;
    color: var(--bp-ink);
    font-family: var(--bp-body);
    font-size: 16px;
    background-color: var(--bp-blue);
    background-image:
        linear-gradient(var(--bp-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--bp-grid) 1px, transparent 1px);
    background-size: 32px 32px;
}
:where(.theme-blueprint) a { color: inherit; text-decoration: none; }
.theme-blueprint :focus-visible { outline: 3px solid #ffd166; outline-offset: 3px; }
.bp-skip { position: absolute; left: -9999px; }
.bp-skip:focus { left: 12px; top: 12px; z-index: 50; padding: 10px 14px; background: var(--bp-sheet); font-weight: 700; }
.bp-set:focus { outline: none; }
.bp-table { max-width: 1360px; margin: 0 auto; padding: 0 24px; }

/* ---------- 母题：标题栏格子 ---------- */
.bp-tb { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto; border-top: 2px solid var(--bp-ink); }
.bp-tb-cell { display: grid; gap: 2px; align-content: start; min-width: 0; padding: 6px 8px; font-size: .84rem; font-weight: 500; overflow-wrap: anywhere; }
.bp-tb-cell + .bp-tb-cell { border-left: 1px solid var(--bp-ink); }
.bp-tb-cell small, .bp-cover-row small, .bp-footer-cell small { font-size: .66rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--bp-soft); }
.bp-tb-no { font-family: var(--bp-display); font-weight: 900; color: var(--bp-red); }

/* ---------- 顶栏 ---------- */
.bp-header { display: flex; align-items: center; gap: 24px; min-height: 64px; color: var(--bp-on-blue); border-bottom: 2px solid var(--bp-on-blue); }
.bp-brand { display: inline-flex; align-items: center; gap: 12px; margin-right: auto; min-width: 0; }
.bp-north { flex: none; }
.bp-brand-name { font-family: var(--bp-display); font-weight: 900; font-size: 1.45rem; letter-spacing: .02em; text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bp-nav { display: flex; gap: 4px; }
.bp-nav a { padding: 8px 14px; font-weight: 700; font-size: .92rem; letter-spacing: .04em; text-transform: uppercase; border: 1px solid transparent; }
.bp-nav a:hover { border-color: var(--bp-on-blue); }
.bp-nav a.is-on { background: var(--bp-on-blue); color: var(--bp-blue); }
.bp-menu-toggle { display: none; color: inherit; }

/* ---------- 版心 ---------- */
.bp-set { display: block; min-height: 60vh; padding: 24px 0 48px; }
.bp-crumb { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 0 8px; font-size: .9rem; color: var(--bp-on-blue); }
.bp-crumb a { font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.bp-empty { margin: 32px 0; padding: 24px; background: var(--bp-sheet); text-align: center; }
.bp-pager { margin-top: 32px; padding: 12px; background: var(--bp-sheet); }

/* 分组标题：白色引线标注 */
.bp-set-group { margin-top: 28px; }
.bp-group-head { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; color: var(--bp-on-blue); font-family: var(--bp-display); font-weight: 900; font-size: 1.05rem; letter-spacing: .14em; text-transform: uppercase; }
.bp-group-head::after { content: ""; flex: 1; height: 0; border-top: 1px dashed var(--bp-on-blue); }
.bp-group-head span { padding: 2px 10px; border: 2px solid var(--bp-on-blue); }

/* ---------- 图纸卡片 ---------- */
.bp-sheets { display: grid; gap: 20px; }
.bp-sheets-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bp-sheets-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bp-sheet { min-width: 0; }
.bp-sheet-link { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto 1fr auto; height: 100%; padding: 8px; background: var(--bp-sheet); box-shadow: inset 0 0 0 1px var(--bp-ink), inset 0 0 0 5px var(--bp-sheet), inset 0 0 0 6px var(--bp-ink); }
.bp-sheet-link:hover .bp-sheet-title { color: var(--bp-line); }
.bp-sheet-drawing { display: block; margin: 4px 4px 0; }
.bp-sheet-drawing img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; background: #dbe6f3; }
.bp-sheet-title { overflow-wrap: anywhere; padding: 12px 8px 14px; font-family: var(--bp-display); font-weight: 700; font-size: 1.08rem; line-height: 1.3; }
.bp-sheet .bp-tb { margin: 0 4px 4px; }

/* ---------- 首页封面图纸 ---------- */
.bp-cover-link { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(300px, 1fr); padding: 10px; background: var(--bp-sheet); box-shadow: inset 0 0 0 2px var(--bp-ink), inset 0 0 0 7px var(--bp-sheet), inset 0 0 0 8px var(--bp-ink); }
.bp-cover-drawing { display: block; padding: 8px; }
.bp-cover-drawing img { display: block; width: 100%; height: 100%; min-height: 100%; aspect-ratio: 24 / 10; object-fit: cover; background: #dbe6f3; }
.bp-cover-block { display: grid; grid-template-rows: auto 1fr auto auto; margin: 8px 8px 8px 0; border: 2px solid var(--bp-ink); }
.bp-cover-row { display: grid; gap: 4px; padding: 10px 14px; font-weight: 500; }
.bp-cover-row + .bp-cover-row, .bp-cover-split { border-top: 1px solid var(--bp-ink); }
.bp-cover-title { font-family: var(--bp-display); font-weight: 900; font-size: clamp(1.55rem, 2.4vw, 2.2rem); line-height: 1.12; }
.bp-cover-link:hover .bp-cover-title { color: var(--bp-line); }
.bp-cover-notes { color: var(--bp-soft); line-height: 1.55; font-size: .95rem; }
.bp-cover-split { display: grid; grid-template-columns: minmax(0, 1fr) auto; }
.bp-cover-split .bp-cover-row + .bp-cover-row { border-top: 0; border-left: 1px solid var(--bp-ink); }

/* ---------- 分类页：带尺寸线的图版 ---------- */
.bp-cat-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.bp-plate { min-width: 0; }
.bp-plate-link { display: grid; grid-template-rows: auto 1fr; height: 100%; background: var(--bp-sheet); border: 2px solid var(--bp-ink); }
.bp-plate-link:hover .bp-plate-title { color: var(--bp-line); }
.bp-plate-drawing { position: relative; display: block; padding: 10px 10px 22px; border-bottom: 1px solid var(--bp-ink); }
.bp-plate-drawing img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; background: #dbe6f3; }
.bp-dim { position: absolute; left: 10px; right: 10px; bottom: 8px; height: 8px; border-left: 1px solid var(--bp-line); border-right: 1px solid var(--bp-line); }
.bp-dim::before { content: ""; position: absolute; left: 0; right: 0; top: 3px; border-top: 1px solid var(--bp-line); }
.bp-plate-text { display: grid; grid-template-rows: auto 1fr auto; gap: 8px; padding: 12px 12px 0; }
.bp-plate-title { overflow-wrap: anywhere; font-family: var(--bp-display); font-weight: 700; font-size: 1.12rem; line-height: 1.28; }
.bp-plate-notes { color: var(--bp-soft); font-size: .93rem; line-height: 1.5; }
.bp-plate-strip { display: flex; flex-wrap: wrap; gap: 4px 12px; margin: 0 -12px; padding: 8px 12px; border-top: 1px solid var(--bp-ink); font-size: .82rem; font-weight: 500; }
.bp-cat-list > .bp-ad { margin: 4px 0; }
.bp-cat-list > .bp-ad:not(:has(.ad)) { display: none; }

/* ---------- 图纸目录 ---------- */
.bp-register { padding: 16px 20px 20px; background: var(--bp-sheet); border: 2px solid var(--bp-ink); }
.bp-register-title { margin: 0 0 16px; font-family: var(--bp-display); font-weight: 900; font-size: clamp(1.8rem, 3.6vw, 2.6rem); letter-spacing: .02em; text-transform: uppercase; }
.bp-register-table { width: 100%; border-collapse: collapse; }
.bp-register-table th, .bp-register-table td { padding: 12px 10px; border: 1px solid var(--bp-ink); text-align: left; vertical-align: top; }
.bp-register-table thead th { font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--bp-soft); }
.bp-register-table tbody th a { font-family: var(--bp-display); font-weight: 700; font-size: 1.05rem; text-decoration: underline; text-decoration-color: var(--bp-line); text-underline-offset: 4px; }
.bp-register-table td { color: var(--bp-soft); line-height: 1.5; }
.bp-register-go { width: 48px; text-align: center !important; font-weight: 900; color: var(--bp-red); }

/* ---------- 广告壳：无广告时塌陷 ---------- */
.bp-ad:has(.ad) { margin: 24px 0; }
.bp-ad:has(.ad) .ad { min-height: 250px; margin: 0 !important; }

/* ---------- 页脚：整张图纸的标题栏 ---------- */
.bp-footer { padding: 8px 0 96px; }
.bp-footer-block { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 2.4fr) minmax(0, .6fr) minmax(0, .6fr); background: var(--bp-sheet); border: 2px solid var(--bp-ink); }
.bp-footer-cell { display: grid; gap: 6px; align-content: start; padding: 12px 14px; }
.bp-footer-cell + .bp-footer-cell { border-left: 1px solid var(--bp-ink); }
.bp-footer-cell strong { font-family: var(--bp-display); font-weight: 900; font-size: 1.1rem; }
.bp-footer-refs ul { display: flex; flex-wrap: wrap; gap: 4px 18px; margin: 0; padding: 0; list-style: none; }
.bp-footer-refs a { display: inline-block; padding: 6px 0; font-weight: 700; text-decoration: underline; text-decoration-color: var(--bp-line); text-underline-offset: 3px; }

/* 文字容器显式写列宽、标签允许收缩：否则超长标题或分类名会撑宽 grid 的隐式列（浏览器闸门 2026-10-21） */
.bp-plate-text, .bp-cover-block { grid-template-columns: minmax(0, 1fr); }
.bp-tb-cell { min-width: 0; }

/* ---------- 共享页面调色 ---------- */
.theme-blueprint .site-menu, .theme-blueprint .site-search, .theme-blueprint .static-page, .theme-blueprint .theme-error { --menu-accent: var(--bp-blue); background: var(--bp-sheet); }

/* ---------- 断点 ---------- */
@media (min-width: 1600px) {
    .bp-table { max-width: 1560px; }
    .bp-sheets-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

@media (max-width: 1023px) {
    .bp-cover-link { grid-template-columns: minmax(0, 1fr); }
    .bp-cover-drawing img { aspect-ratio: 16 / 7; }
    .bp-cover-block { margin: 0 8px 8px; }
    .bp-sheets-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .bp-plate-notes { display: none; }
    .bp-sheet .bp-tb { grid-template-columns: minmax(0, 1fr) auto; }
    .bp-sheet .bp-tb-topic { display: none; }
    .bp-sheet .bp-tb-cell:nth-child(2) { border-left: 0; }
    .bp-footer-block { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
    .bp-footer-refs { grid-column: 1 / -1; grid-row: 2; border-left: 0 !important; border-top: 1px solid var(--bp-ink); }
}

@media (max-width: 767px) {
    .bp-table { padding: 0 10px; }
    .bp-header { min-height: 56px; gap: 10px; }
    .bp-brand-name { font-size: 1.15rem; }
    .bp-north { width: 24px; height: 24px; }
    .bp-menu-toggle { display: inline-grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--bp-on-blue); }
    .bp-set { padding-top: 12px; }
    .bp-cover-link { padding: 6px; }
    .bp-cover-drawing { padding: 6px; }
    .bp-cover-drawing img { aspect-ratio: 16 / 9; }
    .bp-cover-block { margin: 0 6px 6px; }
    .bp-cover-title { font-size: 1.4rem; }
    .bp-cover-notes { display: none; }
    .bp-sheets { gap: 10px; }
    .bp-sheets-three, .bp-sheets-grid { grid-template-columns: minmax(0, 1fr); }
    .bp-sheet-link { grid-template-columns: 104px minmax(0, 1fr); grid-template-rows: 1fr auto; padding: 8px; }
    .bp-sheet-drawing { grid-row: 1 / span 2; margin: 4px 0 4px 4px; }
    .bp-sheet-drawing img { height: 100%; aspect-ratio: auto; min-height: 84px; }
    .bp-sheet-title { padding: 6px 6px 8px 10px; font-size: 1rem; }
    .bp-sheet .bp-tb { margin: 0 4px 4px 10px; }
    .bp-cat-list { grid-template-columns: minmax(0, 1fr); gap: 10px; }
    .bp-plate-link { grid-template-columns: 96px minmax(0, 1fr); grid-template-rows: auto; }
    .bp-plate-drawing { padding: 6px; border-bottom: 0; border-right: 1px solid var(--bp-ink); }
    .bp-plate-drawing img { width: 84px; height: 100%; min-height: 84px; aspect-ratio: auto; }
    .bp-dim { display: none; }
    .bp-plate-text { gap: 6px; padding: 8px 10px 0; }
    .bp-plate-title { font-size: 1rem; }
    .bp-plate-strip { margin: 0 -10px; padding: 6px 10px; }
    .bp-plate-strip > span:first-child { display: none; }
    .bp-register { padding: 12px; }
    .bp-register-table thead { display: none; }
    .bp-register-table tr { display: grid; grid-template-columns: minmax(0, 1fr) 48px; border: 1px solid var(--bp-ink); }
    .bp-register-table tr + tr { border-top: 0; }
    .bp-register-table th, .bp-register-table td { border: 0; }
    .bp-register-table td:not(.bp-register-go) { grid-column: 1; grid-row: 2; padding-top: 0; }
    .bp-register-go { grid-column: 2; grid-row: 1 / span 2; align-self: center; }
    .bp-footer-block { grid-template-columns: minmax(0, 1fr); }
    .bp-footer-cell + .bp-footer-cell { border-left: 0; border-top: 1px solid var(--bp-ink); }
    .bp-footer-refs { grid-row: auto; }
}

/* 移动端：分类导航只在 /menu 出现，隐藏规则放在全局规则之后 */
@media (max-width: 767px) {
    .bp-nav { display: none; }
}

/* 浏览器闸门（2026-10-21）：图号是编码，不能被全站 overflow-wrap: anywhere 拆成竖排 */
.bp-tb-no { white-space: nowrap; }