/* ============================================================
   海外 BIM 工程咨询服务页（/zh/overseas-bim/）— 页面专属样式
   沿用 shared/theme.css 设计令牌（工程仪表盘风：浅底、蓝色强调、
   无渐变发光）。此处只加页面级组件，不改主题。
   ============================================================ */

:root {
  --ob-line: #dde3ea;
  --ob-soft: #eaf3fc;
  --ob-ink: #16202c;
  --ob-ink2: #46576b;
  --ob-muted: #7488a0;
}

body { background: var(--bg); }

/* 页面比正文页宽一些，卡片网格需要呼吸感 */
.ob-wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.ob-main { padding-bottom: 56px; }

/* ---------- 通用区块 ---------- */
.ob-sec { padding: 52px 0 8px; }
.ob-sec + .ob-sec { border-top: 1px solid var(--ob-line); }
.ob-sec-hd { margin-bottom: 22px; }
.ob-eyebrow {
  font: 600 12px/1 ui-monospace, Consolas, monospace;
  letter-spacing: .12em; color: var(--accent);
  text-transform: uppercase; margin: 0 0 10px;
}
.ob-h2 { font-size: 25px; line-height: 1.35; margin: 0 0 8px; color: var(--ob-ink); letter-spacing: -.2px; }
.ob-lede { margin: 0; color: var(--ob-ink2); font-size: 15px; max-width: 74ch; }
.ob-note { font-size: 13px; color: var(--ob-muted); margin: 14px 0 0; }

/* ---------- 1. Hero ---------- */
.ob-hero { background: var(--surface); border-bottom: 1px solid var(--ob-line); }
.ob-hero-in { padding: 44px 0 38px; }
.ob-hero h1 {
  font-size: 33px; line-height: 1.3; margin: 0 0 14px;
  letter-spacing: -.4px; color: var(--ob-ink);
}
.ob-hero-sub { margin: 0 0 22px; font-size: 16px; line-height: 1.7; color: var(--ob-ink2); max-width: 68ch; }
.ob-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 24px; padding: 0; list-style: none; }
.ob-tags li {
  font: 500 12.5px/1 ui-monospace, Consolas, monospace;
  color: var(--accent-ink); background: var(--ob-soft);
  border: 1px solid #d5e6f7; border-radius: 4px; padding: 7px 9px;
}
.ob-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.ob-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 6px; font-size: 15px; font-weight: 600;
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
  cursor: pointer; text-decoration: none;
}
.ob-btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); text-decoration: none; color: #fff; }
.ob-btn.ghost { background: transparent; color: var(--accent); }
.ob-btn.ghost:hover { background: var(--ob-soft); color: var(--accent-ink); }

/* 数据条 */
.ob-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--ob-line); border: 1px solid var(--ob-line);
  border-radius: var(--radius); overflow: hidden; margin: 34px 0 0;
}
.ob-stats div { background: var(--surface); padding: 16px 18px; }
.ob-stats b {
  display: block; font: 700 25px/1.15 ui-monospace, Consolas, monospace;
  color: var(--accent-ink); letter-spacing: -.5px;
}
.ob-stats b em { font: 600 13px/1 system-ui, sans-serif; font-style: normal; color: var(--ob-ink2); margin-left: 3px; }
.ob-stats span { font-size: 12.5px; color: var(--ob-muted); }

/* ---------- 2. 痛点 ---------- */
.ob-pain { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.ob-pain article {
  background: var(--surface); border: 1px solid var(--ob-line);
  border-left: 3px solid var(--accent); border-radius: var(--radius); padding: 16px 18px;
}
.ob-pain h3 { margin: 0 0 6px; font-size: 16px; color: var(--ob-ink); }
.ob-pain p { margin: 0; color: var(--ob-ink2); font-size: 14px; }

/* ---------- 3. 服务 ---------- */
.ob-svc { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.ob-svc-card {
  background: var(--surface); border: 1px solid var(--ob-line);
  border-radius: var(--radius); padding: 20px 22px;
}
.ob-svc-no {
  font: 700 12px/1 ui-monospace, Consolas, monospace; color: var(--accent);
  letter-spacing: .1em;
}
.ob-svc-card h3 { margin: 8px 0 2px; font-size: 18px; color: var(--ob-ink); }
.ob-svc-en { font: 500 11.5px/1.4 ui-monospace, Consolas, monospace; color: var(--ob-muted); margin: 0 0 10px; }
.ob-svc-desc { margin: 0 0 12px; color: var(--ob-ink2); font-size: 14px; }
.ob-svc-items { margin: 0 0 12px; padding: 0; list-style: none; }
.ob-svc-items li { position: relative; padding: 5px 0 5px 15px; font-size: 13.5px; color: var(--ob-ink2); border-top: 1px dashed var(--ob-line); }
.ob-svc-items li:first-child { border-top: 0; }
.ob-svc-items li::before { content: ""; position: absolute; left: 0; top: 12px; width: 6px; height: 6px; border-radius: 1px; background: var(--accent); }
.ob-deliver {
  background: var(--ob-soft); border: 1px solid #d5e6f7; border-radius: 5px;
  padding: 10px 12px; font-size: 12.5px; color: var(--accent-ink);
}
.ob-deliver b { font-weight: 700; letter-spacing: .02em; }

/* ---------- 4. 标准体系 ---------- */
.ob-std-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 26px; }
.ob-std {
  background: var(--surface); border: 1px solid var(--ob-line);
  border-radius: var(--radius); padding: 14px 16px;
}
.ob-std code {
  display: block; font: 700 13px/1.4 ui-monospace, Consolas, monospace;
  color: var(--accent-ink); margin-bottom: 4px;
}
.ob-std b { display: block; font-size: 14px; color: var(--ob-ink); margin-bottom: 3px; }
.ob-std p { margin: 0; font-size: 12.5px; color: var(--ob-muted); }

.ob-ladder { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); overflow: hidden; }
.ob-lad-hd {
  display: grid; grid-template-columns: 92px 1fr 150px 92px;
  gap: 0; padding: 9px 16px; background: #f0f3f7;
  font: 600 11.5px/1.4 ui-monospace, Consolas, monospace; color: var(--ob-ink2);
  letter-spacing: .04em;
}
.ob-lad-row {
  display: grid; grid-template-columns: 92px 1fr 150px 92px; align-items: center;
  padding: 14px 16px; border-top: 1px solid var(--ob-line);
}
.ob-lad-phase { font: 700 15px/1.2 ui-monospace, Consolas, monospace; color: var(--accent-ink); }
.ob-lad-phase small { display: block; font: 500 11.5px/1.4 system-ui, sans-serif; color: var(--ob-muted); margin-top: 3px; }
.ob-lad-desc { font-size: 13.5px; color: var(--ob-ink2); padding-right: 14px; }
.ob-lad-lod { font: 700 13px/1 ui-monospace, Consolas, monospace; color: var(--ob-ink); }
.ob-lad-lod small { display: block; font: 500 11.5px/1.4 system-ui, sans-serif; color: var(--ob-muted); margin-top: 4px; }
.ob-lad-owner {
  font-size: 11.5px; text-align: center; padding: 5px 6px; border-radius: 4px;
  border: 1px solid;
}
.ob-lad-owner.own-design { color: #0f7b4f; background: #e9f6f0; border-color: #bfe6d5; }
.ob-lad-owner.own-build { color: #8a5a00; background: #fff6e5; border-color: #f0dcb4; }
.ob-ladder-note { margin: 14px 0 0; font-size: 13px; color: var(--ob-ink2); background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); padding: 12px 16px; }

/* ---------- 5. 案例 ---------- */
.ob-filter { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0 0 18px; }
.ob-filter b { font-size: 13px; color: var(--ob-muted); font-weight: 500; margin-right: 2px; }
.ob-fbtn {
  border: 1px solid var(--ob-line); background: var(--surface); color: var(--ob-ink2);
  border-radius: 999px; padding: 6px 14px; font-size: 13px; cursor: pointer;
}
.ob-fbtn:hover { border-color: var(--accent); color: var(--accent); }
.ob-fbtn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.ob-cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ob-case {
  display: flex; flex-direction: column; background: var(--surface);
  border: 1px solid var(--ob-line); border-radius: var(--radius);
  overflow: hidden; text-decoration: none;
}
.ob-case:hover { border-color: var(--accent); text-decoration: none; }
.ob-case .ob-case-img { display: block; aspect-ratio: 16 / 9; background: #dfe6ee; overflow: hidden; }
.ob-case .ob-case-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ob-case .ob-case-img.nophoto {
  display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 16px; color: var(--ob-ink2);
  background: repeating-linear-gradient(135deg, #eef2f6, #eef2f6 10px, #e6ebf1 10px, #e6ebf1 20px);
}
.ob-case .ob-case-in { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.ob-case h3 { margin: 0; font-size: 15.5px; line-height: 1.45; color: var(--ob-ink); }
.ob-case .ob-case-loc { font-size: 12.5px; color: var(--muted); font-family: ui-monospace, Consolas, monospace; }
.ob-case .ob-case-sum { margin: 0; font-size: 13px; color: var(--ob-ink2); }
.ob-case .ob-case-meta {
  margin-top: auto; padding-top: 10px; border-top: 1px solid var(--ob-line);
  display: flex; flex-wrap: wrap; gap: 6px;
}
.ob-chip {
  font: 500 11.5px/1 ui-monospace, Consolas, monospace; color: var(--ob-ink2);
  background: #f1f4f8; border: 1px solid var(--ob-line); border-radius: 3px; padding: 5px 7px;
}
.ob-empty { grid-column: 1 / -1; padding: 26px; text-align: center; color: var(--ob-muted); font-size: 14px; }

/* ---------- 6. 能力展示 ---------- */
.ob-caps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ob-cap { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); overflow: hidden; }
.ob-cap img { width: 100%; aspect-ratio: 10 / 7; object-fit: cover; display: block; background: #dfe6ee; }
.ob-cap-in { padding: 13px 15px 15px; }
.ob-cap h3 { margin: 0 0 5px; font-size: 15px; color: var(--ob-ink); }
.ob-cap p { margin: 0; font-size: 12.8px; line-height: 1.6; color: var(--ob-ink2); }

/* ---------- 7. 信任背书 ---------- */
.ob-creds { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.ob-cred { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); padding: 17px 19px; }
.ob-cred h3 {
  margin: 0 0 10px; font-size: 15px; color: var(--ob-ink);
  padding-bottom: 8px; border-bottom: 2px solid var(--ob-soft);
}
.ob-cred ul { margin: 0; padding: 0; list-style: none; }
.ob-cred li { position: relative; padding: 4px 0 4px 16px; font-size: 13.5px; color: var(--ob-ink2); }
.ob-cred li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 5px; height: 5px; border-radius: 1px; background: var(--accent); }

/* ---------- 8. 流程 ---------- */
.ob-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.ob-step { position: relative; background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); padding: 16px 17px; }
.ob-step .ob-step-no {
  font: 700 22px/1 ui-monospace, Consolas, monospace; color: #c3d3e4; margin-bottom: 8px;
}
.ob-step h3 { margin: 0 0 6px; font-size: 15.5px; color: var(--ob-ink); }
.ob-step p { margin: 0; font-size: 13px; line-height: 1.62; color: var(--ob-ink2); }

/* ---------- 9. FAQ ---------- */
.ob-faq { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); }
.ob-faq details { border-top: 1px solid var(--ob-line); }
.ob-faq details:first-child { border-top: 0; }
.ob-faq summary {
  cursor: pointer; padding: 14px 18px; font-size: 15px; font-weight: 600; color: var(--ob-ink);
  list-style: none; display: flex; justify-content: space-between; gap: 12px; align-items: center;
}
.ob-faq summary::-webkit-details-marker { display: none; }
.ob-faq summary::after { content: "+"; font: 400 19px/1 ui-monospace, monospace; color: var(--accent); }
.ob-faq details[open] summary::after { content: "−"; }
.ob-faq details[open] summary { color: var(--accent-ink); }
.ob-faq .ob-a { padding: 0 18px 16px; margin: 0; font-size: 14px; line-height: 1.72; color: var(--ob-ink2); }

/* ---------- 10. CTA / 表单 ---------- */
.ob-cta-box { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); overflow: hidden; }
.ob-cta-in { display: grid; grid-template-columns: 1fr 1fr; }
.ob-cta-l { padding: 28px 30px; border-right: 1px solid var(--ob-line); }
.ob-cta-l h2 { margin: 0 0 10px; font-size: 22px; line-height: 1.4; color: var(--ob-ink); }
.ob-cta-l p { margin: 0 0 18px; font-size: 14px; color: var(--ob-ink2); }
.ob-promises { margin: 0; padding: 0; list-style: none; }
.ob-promises li { position: relative; padding: 6px 0 6px 22px; font-size: 14px; color: var(--ob-ink2); }
.ob-promises li::before {
  content: "✓"; position: absolute; left: 0; top: 6px;
  color: var(--ok); font-weight: 700;
}
.ob-channels { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--ob-line); font-size: 13.5px; color: var(--ob-ink2); }
.ob-channels b { color: var(--ob-ink); }
.ob-ch-empty { color: var(--ob-muted); }
.ob-form { padding: 24px 30px; background: #fbfcfe; }
.ob-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ob-form label { display: block; font-size: 13px; color: var(--ob-ink2); margin: 0 0 5px; font-weight: 500; }
.ob-form .ob-f { margin-bottom: 12px; }
.ob-form input, .ob-form select, .ob-form textarea {
  width: 100%; padding: 9px 11px; font: inherit; font-size: 14px; color: var(--ob-ink);
  border: 1px solid var(--ob-line); border-radius: 5px; background: #fff;
}
.ob-form textarea { min-height: 78px; resize: vertical; }
.ob-form input:focus, .ob-form select:focus, .ob-form textarea:focus {
  outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px var(--ob-soft);
}
.ob-form .ob-submit { width: 100%; justify-content: center; margin-top: 4px; }
.ob-form-note { margin: 10px 0 0; font-size: 12px; color: var(--ob-muted); }
.ob-done { display: none; margin-top: 12px; padding: 13px 15px; border: 1px solid #bfe6d5; background: #e9f6f0; border-radius: 5px; font-size: 13.5px; color: #0b5c3c; }
.ob-done.on { display: block; }
.ob-done pre {
  margin: 9px 0 0; padding: 9px 11px; background: #fff; border: 1px solid #cfe8dc; border-radius: 4px;
  font: 12px/1.6 ui-monospace, Consolas, monospace; color: var(--ob-ink2);
  white-space: pre-wrap; word-break: break-all;
}

/* ---------- 中部 CTA（案例区后） ---------- */
.ob-midcta {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px; margin: 26px 0 0; padding: 20px 24px;
  background: var(--accent-soft); border: 1px solid #d5e6f7; border-radius: var(--radius);
}
.ob-midcta p { margin: 0; font-size: 15px; color: var(--accent-ink); font-weight: 600; }
.ob-midcta span { display: block; font-size: 13px; font-weight: 400; color: var(--ob-ink2); margin-top: 3px; }

/* ---------- 详情页 ---------- */
.ob-crumbs { font-size: 13px; color: var(--ob-muted); margin: 22px 0 16px; }
.ob-crumbs a { color: var(--ob-ink2); }
.ob-dp-hd { margin-bottom: 20px; }
.ob-dp-hd h1 { font-size: 27px; line-height: 1.35; margin: 0 0 6px; letter-spacing: -.3px; }
.ob-dp-hd .ob-dp-en { font: 500 13px/1.5 ui-monospace, Consolas, monospace; color: var(--ob-muted); margin: 0 0 12px; }
.ob-dp-meta { display: flex; flex-wrap: wrap; gap: 7px; }
.ob-dp-hero { margin: 0 0 24px; border: 1px solid var(--ob-line); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.ob-dp-hero img { width: 100%; display: block; aspect-ratio: 21 / 9; object-fit: cover; }
.ob-dp-hero.nophoto {
  aspect-ratio: auto; padding: 34px 26px; text-align: center; color: var(--ob-ink2);
  background: repeating-linear-gradient(135deg, #eef2f6, #eef2f6 10px, #e6ebf1 10px, #e6ebf1 20px);
}
.ob-dp-grid { display: grid; grid-template-columns: 1fr 300px; gap: 26px; align-items: start; }
.ob-dp-tbl { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--ob-line); font-size: 13.5px; }
.ob-dp-tbl th, .ob-dp-tbl td { border: 1px solid var(--ob-line); padding: 9px 12px; text-align: left; }
.ob-dp-tbl th { background: #f0f3f7; font-weight: 600; color: var(--ob-ink2); width: 40%; }
.ob-dp-side { background: var(--surface); border: 1px solid var(--ob-line); border-radius: var(--radius); padding: 16px 18px; }
.ob-dp-side h3 { margin: 0 0 9px; font-size: 14px; color: var(--ob-ink); }
.ob-dp-side ul { margin: 0 0 14px; padding: 0; list-style: none; }
.ob-dp-side li { position: relative; padding: 4px 0 4px 14px; font-size: 13px; color: var(--ob-ink2); }
.ob-dp-side li::before { content: ""; position: absolute; left: 0; top: 11px; width: 5px; height: 5px; border-radius: 1px; background: var(--accent); }
.ob-dp-body h3 { font-size: 17px; margin: 26px 0 8px; color: var(--ob-ink); }
.ob-dp-body p { margin: 0 0 12px; font-size: 14.5px; line-height: 1.75; color: var(--ob-ink2); }
.ob-dp-body ul { margin: 0 0 12px; padding-left: 20px; }
.ob-dp-body li { font-size: 14px; line-height: 1.7; color: var(--ob-ink2); margin-bottom: 5px; }
.ob-dp-nav { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--ob-line); font-size: 14px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .ob-stats, .ob-cases, .ob-caps, .ob-std-grid, .ob-flow { grid-template-columns: repeat(2, 1fr); }
  .ob-cta-in { grid-template-columns: 1fr; }
  .ob-cta-l { border-right: 0; border-bottom: 1px solid var(--ob-line); }
  .ob-dp-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .ob-hero h1 { font-size: 26px; }
  .ob-h2 { font-size: 21px; }
  .ob-sec { padding: 38px 0 4px; }
  .ob-stats, .ob-pain, .ob-svc, .ob-creds, .ob-cases, .ob-caps, .ob-std-grid, .ob-flow, .ob-form-row { grid-template-columns: 1fr; }
  .ob-lad-hd { display: none; }
  .ob-lad-row { grid-template-columns: 1fr; gap: 8px; }
  .ob-lad-owner { justify-self: start; }
  .ob-midcta { flex-direction: column; align-items: flex-start; }
}