/* Technical page presentation only. Content, anchors and scripts are untouched. */
450;500;550;600;650;700&family=JetBrains+Mono:wght@400;500;600&family=Noto+Sans+TC:wght@400;450;500;600;650;700&display=swap');

body[data-page="technical"] {
  --tech-ink: #111827;
  --tech-body: #475569;
  --tech-muted: #64748b;
  --tech-line: #e5e7eb;
  --tech-wash: #f8fafc;
  --tech-accent: #07839d;
  --tech-radius: 16px;
  --tech-shadow: 0 2px 4px rgba(15, 23, 42, .025);
  --font-zh: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-en: "Inter", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-tech: var(--font-en);
  --mono: "JetBrains Mono", "Noto Sans TC", "SFMono-Regular", Consolas, monospace;
  --sans: var(--font-en);
  --serif: var(--font-zh);
  --bg: #fff;
  --bg-alt: #f8fafc;
  --bg-card: #fff;
  --fg: #111827;
  --fg-mid: #475569;
  --fg-dim: #64748b;
  --brand: #19bce5;
  --brand-soft: #edf9fc;
  --accent: #07839d;
  --accent-soft: #edf9fc;
  --line: #e5e7eb;
  --line-soft: #edf0f3;
  --shadow-1: var(--tech-shadow);
  --shadow-2: 0 6px 20px rgba(15, 23, 42, .045);
  --page-nav-height: 76px;
  margin: 0;
  min-width: 0;
  color: var(--tech-ink);
  background: #fff;
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body[data-page="technical"] .l-zh { font-family: var(--font-en); }
body[data-page="technical"] :is(button, input, select, textarea) { font-family: var(--font-en); }
body[data-page="technical"] :is(h1, h2, h3, h4) {
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--tech-ink);
  text-shadow: none;
  -webkit-text-stroke: 0;
}
body[data-page="technical"] :is(p, li, .sec-note, .body-text) { font-weight: 400; }
body[data-page="technical"] :is(strong, b) { font-weight: 600; }
body[data-page="technical"] .body-text strong { color: var(--tech-ink); }
body[data-page="technical"] :is(.wrap, section > .wrap) {
  width: min(1240px, calc(100% - 96px));
  max-width: 1240px;
  min-width: 0;
  margin-inline: auto;
}
body[data-page="technical"] :is(.acc, .acc-item, .acc-inner, .acc-inner > *, .fw-role, .road-card, .credit-group, .contact-row > *) { min-width: 0; }
body[data-page="technical"] :is(a, button):focus-visible {
  outline: 2px solid var(--tech-accent);
  outline-offset: 4px;
}

/* Quiet white navigation, with the existing menu and active-state behaviour. */
body[data-page="technical"] .nav,
body[data-page="technical"] .nav.stuck {
  min-height: 76px;
  background: #fff;
  border-bottom: 1px solid var(--tech-line);
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
body[data-page="technical"] .nav-inner {
  width: min(1360px, calc(100% - 64px));
  max-width: 1360px;
  min-height: 76px;
  gap: 18px;
  padding-block: 12px;
}
body[data-page="technical"] .nav.stuck .nav-inner { padding-block: 10px; }
body[data-page="technical"] .brand {
  flex-shrink: 0;
  color: var(--tech-ink);
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .13em;
}
body[data-page="technical"] .brand b { color: var(--tech-accent); }
body[data-page="technical"] .brand-logo {
  width: 38px;
  height: 38px;
  border: 1px solid #edf0f3;
  border-radius: 9px;
  box-shadow: none;
}
body[data-page="technical"] .nav-links {
  min-width: 0;
  flex-wrap: nowrap;
  gap: 0;
  background: #fff;
}
body[data-page="technical"] .nav-links a {
  padding: 10px 8px;
  color: #64748b;
  background: transparent;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.5;
  border-radius: 6px;
  box-shadow: none;
  transition: color 180ms ease, background-color 180ms ease;
}
body[data-page="technical"] .nav-links a:hover { color: var(--tech-ink); background: #f8fafc; }
body[data-page="technical"] .nav-links a.active { color: var(--tech-accent); font-weight: 600; background: transparent; box-shadow: none; }
body[data-page="technical"] .nav-links a::after { background: var(--brand); height: 2px; bottom: 3px; }
body[data-page="technical"] .nav-right { flex: 0 0 auto; gap: 10px; }
body[data-page="technical"] .lang { padding: 3px; background: #f8fafc; border: 1px solid var(--tech-line); box-shadow: none; }
body[data-page="technical"] .lang button { min-height: 32px; padding: 5px 10px; color: var(--tech-muted); font-size: 12px; font-weight: 500; box-shadow: none; }
body[data-page="technical"] .lang button[aria-pressed="true"] { color: var(--tech-accent); background: #eaf7fb; box-shadow: none; }
body[data-page="technical"] .btn {
  min-height: 44px;
  border-radius: 10px;
  border: 1px solid var(--tech-line);
  color: var(--tech-ink);
  background: #fff;
  font-weight: 550;
  box-shadow: none;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}
body[data-page="technical"] .btn:hover { transform: translateY(-2px); border-color: #b7dfe8; background: #f8fafc; box-shadow: none; }
body[data-page="technical"] :is(.nav .btn-primary, .modal .btn-primary) { color: #07303a; border-color: var(--brand); background: var(--brand); box-shadow: none; }
body[data-page="technical"] :is(.nav .btn-primary, .modal .btn-primary):hover { color: #06232c; background: #41c7e7; border-color: #41c7e7; }
body[data-page="technical"] .nav .btn { padding-inline: 15px; font-size: 12px; }
body[data-page="technical"] .nav-toggle { width: 44px; height: 44px; color: var(--tech-ink); background: #fff; border: 1px solid var(--tech-line); border-radius: 10px; }

/* The existing section header becomes a calm, spacious introduction. */
body[data-page="technical"] #deepdive {
  padding-block: 112px 120px;
  background: #fff;
  border-bottom: 0;
}
body[data-page="technical"] .sec-head {
  display: block;
  max-width: 820px;
  margin: 0 0 64px;
}
body[data-page="technical"] .eyebrow,
body[data-page="technical"] .sec-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: auto;
  min-height: 0;
  padding: 0;
  color: var(--tech-accent);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .13em;
  line-height: 1.6;
  text-transform: uppercase;
  text-shadow: none;
}
body[data-page="technical"] .eyebrow::before { width: 22px; flex-basis: 22px; height: 1px; background: #93d5e3; box-shadow: none; }
body[data-page="technical"] .sec-head h2,
body[data-page="technical"] .sec-head h2.l-zh,
body[data-page="technical"] .sec-head h2.l-en {
  width: auto;
  max-width: 100%;
  margin: 20px 0 0;
  font-family: var(--font-en);
  font-size: clamp(40px, 4.2vw, 60px);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -.025em;
  color: var(--tech-ink);
  text-wrap: balance;
}
body[data-page="technical"] .sec-head h2.l-zh { letter-spacing: .01em; line-height: 1.3; }
body[data-page="technical"] .sec-head .sec-note {
  max-width: 720px;
  margin-top: 24px;
  color: var(--tech-muted);
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .005em;
}

/* Accordion states and content remain controlled by the existing script. */
body[data-page="technical"] .acc {
  display: grid;
  gap: 12px;
  margin-top: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
body[data-page="technical"] .acc-item {
  overflow: hidden;
  border: 1px solid var(--tech-line);
  border-radius: var(--tech-radius);
  background: #fff;
  box-shadow: var(--tech-shadow);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
body[data-page="technical"] .acc-item:last-child { border-bottom: 1px solid var(--tech-line); }
body[data-page="technical"] .acc-item:hover { border-color: #cbdce1; }
body[data-page="technical"] .acc-item.open { border-color: #c9e2e9; box-shadow: 0 4px 18px rgba(15, 23, 42, .035); }
body[data-page="technical"] .acc-head,
body[data-page="technical"] .safety-block .acc-head {
  min-height: 82px;
  padding: 24px 28px;
  gap: 20px;
  color: var(--tech-ink);
  background: #fff;
  border-radius: 0;
  font-family: var(--font-en);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .005em;
  box-shadow: none;
  transition: background-color 180ms ease;
}
body[data-page="technical"] .acc-head:hover { background: #fafcfd; }
body[data-page="technical"] .acc-head .t { min-width: 0; font-size: 17px; font-weight: 600; overflow-wrap: anywhere; }
body[data-page="technical"] .acc-head .chev { flex: 0 0 24px; width: 24px; height: 24px; padding: 3px; color: #7b8b9e; background: #f8fafc; border: 1px solid #edf0f3; border-radius: 50%; transition: transform 200ms ease, color 180ms ease; }
body[data-page="technical"] .acc-item.open .acc-head .chev { color: var(--tech-accent); background: #eef9fb; }
body[data-page="technical"] .acc-inner,
body[data-page="technical"] .safety-block .acc-inner { padding: 0 28px 30px; color: var(--tech-body); }
body[data-page="technical"] .acc-body > div { min-width: 0; }
body[data-page="technical"] .acc-inner .body-text {
  max-width: 920px;
  margin: 4px 0 20px !important;
  font-family: var(--font-en);
  font-size: 15px !important;
  font-weight: 400;
  line-height: 1.9;
  color: var(--tech-body);
  overflow-wrap: anywhere;
}
body[data-page="technical"] .acc-inner .body-text:last-child { margin-bottom: 0 !important; }
body[data-page="technical"] .acc-inner strong { color: var(--tech-ink); font-weight: 600; }

/* Technical tables: precise alignment with contained horizontal scrolling. */
body[data-page="technical"] .table-scroll {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  margin-block: 24px 0;
  border: 1px solid var(--tech-line);
  border-radius: 12px;
  background: #fff;
  box-shadow: none;
  overscroll-behavior-inline: contain;
  scrollbar-width: thin;
  scrollbar-color: #b9cbd1 #f8fafc;
}
body[data-page="technical"] table { width: 100%; min-width: 640px; table-layout: auto; border-collapse: separate; border-spacing: 0; background: #fff; color: var(--tech-body); }
body[data-page="technical"] :is(th, td) { padding: 18px 22px; border: 0; border-bottom: 1px solid #edf0f3; text-align: left; font-family: var(--font-en); font-size: 14px; font-weight: 400; line-height: 1.75; letter-spacing: 0; }
body[data-page="technical"] thead th { color: var(--tech-muted); background: #f8fafc; font-size: 12px; font-weight: 550; letter-spacing: .035em; }
body[data-page="technical"] tbody th { font-family: var(--mono); font-size: 13px; font-weight: 500; color: #334155; background: #fff; white-space: nowrap; }
body[data-page="technical"] tbody td:last-child { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--tech-accent); white-space: nowrap; }
body[data-page="technical"] tbody tr { background: #fff; }
body[data-page="technical"] tbody tr:hover :is(th, td) { background: #fbfdfe; }
body[data-page="technical"] tbody tr:last-child :is(th, td) { border-bottom: 0; }

/* Firmware roles and flow keep their original reading order. */
body[data-page="technical"] .fw-role-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 26px; }
body[data-page="technical"] .fw-role { padding: 26px; border: 1px solid var(--tech-line); border-radius: 14px; background: #fcfdfe; box-shadow: none; }
body[data-page="technical"] .fw-role-head { display: block; margin-bottom: 18px; }
body[data-page="technical"] .fw-role-head h4 { margin: 0; font-family: var(--font-en); font-size: 17px; font-weight: 600; line-height: 1.5; letter-spacing: 0; }
body[data-page="technical"] .fw-file { display: inline-block; margin-top: 10px; padding: 4px 8px; border: 1px solid #e5eaf0; border-radius: 6px; background: #fff; color: var(--tech-muted); font: 400 12px/1.6 var(--mono); }
body[data-page="technical"] .fw-role ul { margin: 0; padding-left: 18px; font-family: var(--font-en); font-size: 14px; line-height: 1.85; color: var(--tech-body); }
body[data-page="technical"] .fw-role li + li { margin-top: 12px; }
body[data-page="technical"] .fw-role li::marker { color: #a3b0bf; }
body[data-page="technical"] .fw-flow-list { gap: 12px; margin-top: 28px; }
body[data-page="technical"] .fw-flow { display: flex; flex-wrap: nowrap; gap: 10px; max-width: 100%; padding: 20px; overflow-x: auto; border: 1px solid #e8edf1; border-radius: 12px; background: #fff; scrollbar-width: thin; scrollbar-color: #b9cbd1 #f8fafc; }
body[data-page="technical"] .fw-flow-label { flex: 0 0 96px; color: var(--tech-muted); font-family: var(--font-en); font-size: 12px; font-weight: 500; letter-spacing: 0; }
body[data-page="technical"] .fw-step { flex: 0 0 auto; width: auto; padding: 9px 12px; color: #475569; border: 1px solid #e5e7eb; border-radius: 8px; background: #fafcfd; font-family: var(--font-en); font-size: 12px; font-weight: 500; line-height: 1.5; white-space: nowrap; }
body[data-page="technical"] .fw-step.radio { color: var(--tech-accent); background: #edf9fc; border-color: #cbeaf2; font-weight: 600; }
body[data-page="technical"] .fw-step.alert { color: #334155; background: #f5f7fa; border-color: #dce3eb; font-weight: 500; }
body[data-page="technical"] .fw-arrow { font-family: var(--font-en); font-size: 16px; font-weight: 400; color: #a3b0bf; transform: none; }

/* Packet strings remain unmodified and can scroll without clipping the page. */
body[data-page="technical"] code { padding: 2px 6px; border: 1px solid #e5eaf0; border-radius: 5px; background: #f8fafc; color: #334155; font-family: var(--mono); font-size: .9em; font-weight: 400; overflow-wrap: anywhere; }
body[data-page="technical"] pre.code {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  margin: 24px 0;
  padding: 26px 28px;
  overflow: auto;
  border: 1px solid var(--tech-line);
  border-radius: 12px;
  color: #334155;
  background: #f8fafc;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0;
  font-variant-ligatures: none;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  box-shadow: none;
  scrollbar-width: thin;
  scrollbar-color: #b9cbd1 #f8fafc;
  overscroll-behavior-inline: contain;
}
body[data-page="technical"] .code .c { color: #708095; font-weight: 400; }
body[data-page="technical"] .code .k { color: #1e5363; font-weight: 500; }
body[data-page="technical"] #a-packet .specs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 26px !important; border: 0; background: transparent; }
body[data-page="technical"] #a-packet .spec { display: block; padding: 20px; border: 1px solid #e8edf1; border-radius: 12px; background: #fff; }
body[data-page="technical"] #a-packet .spec .k { display: block; margin-bottom: 10px; color: var(--tech-muted); font-family: var(--font-en); font-size: 12px; font-weight: 500; line-height: 1.5; }
body[data-page="technical"] #a-packet .spec .v { display: block; color: var(--tech-ink); font-family: var(--font-en); font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; line-height: 1.75; text-align: left; overflow-wrap: anywhere; }

/* Safety is a separate chapter with a light editorial introduction. */
body[data-page="technical"] .safety-block { margin-top: 120px; padding-top: 72px; border: 0; border-top: 1px solid var(--tech-line); border-radius: 0; background: #fff; box-shadow: none; }
body[data-page="technical"] .safety-head { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; align-items: center; margin-bottom: 36px; }
body[data-page="technical"] .safety-head h3 { margin: 18px 0 0; font-family: var(--font-en); font-size: clamp(28px, 2.8vw, 38px); font-weight: 600; line-height: 1.4; letter-spacing: -.015em; color: var(--tech-ink); }
body[data-page="technical"] .safety-head h3.l-zh { letter-spacing: .01em; }
body[data-page="technical"] .safety-head p { margin: 0; max-width: 580px; color: var(--tech-muted); font-family: var(--font-en); font-size: 15px; line-height: 1.85; }
body[data-page="technical"] .safety-status { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
body[data-page="technical"] .safety-status > span { display: inline-flex; align-items: center; justify-content: center; min-height: 32px; padding: 6px 10px; border: 1px solid #e5eaf0; border-radius: 6px; background: #f8fafc; color: #64748b; font-family: var(--font-en); font-size: 10px; font-weight: 500; letter-spacing: .06em; line-height: 1.5; }
body[data-page="technical"] .safety-block .acc { margin-top: 0; }
body[data-page="technical"] .safety-num { width: 30px; height: 30px; border-radius: 8px; color: var(--tech-accent); background: #edf9fc; font-family: var(--font-en); font-size: 11px; font-weight: 600; letter-spacing: .02em; }
body[data-page="technical"] .safety-block .acc-head .t { gap: 16px; }
body[data-page="technical"] .safety-note { padding: 18px 20px; margin-top: 22px; border: 1px solid #e8edf1; border-left: 2px solid #addbe7; border-radius: 10px; background: #f8fafc; color: #64748b; font-family: var(--font-en); font-size: 13px; line-height: 1.85; }

/* Deployment uses the existing three cards and preserves every estimate. */
body[data-page="technical"] #roadmap { padding-block: 112px 120px; border-block: 1px solid #edf0f3; background: #f8fafc; }
body[data-page="technical"] #roadmap .sec-head { max-width: 840px; margin-bottom: 48px; }
body[data-page="technical"] #roadmap .sec-head h2 { font-size: clamp(32px, 3.4vw, 46px); }
body[data-page="technical"] .road { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 0; align-items: stretch; }
body[data-page="technical"] .road-card { padding: 30px; border: 1px solid var(--tech-line); border-radius: var(--tech-radius); background: #fff; box-shadow: var(--tech-shadow); transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease; }
body[data-page="technical"] .road-card:hover { border-color: #b7dfe8; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(15, 23, 42, .045); }
body[data-page="technical"] .road-card .n { color: var(--tech-accent); font-family: var(--font-en); font-size: 12px; font-weight: 600; letter-spacing: .08em; }
body[data-page="technical"] .road-card h3 { margin: 20px 0 0; font-family: var(--font-en); font-size: 20px; font-weight: 600; line-height: 1.5; letter-spacing: -.015em; }
body[data-page="technical"] .road-list { gap: 16px; margin-top: 24px; }
body[data-page="technical"] .road-list li { grid-template-columns: 14px minmax(0, 1fr); gap: 10px; font-size: 14px; font-weight: 400; line-height: 1.85; color: var(--tech-body); overflow-wrap: anywhere; }
body[data-page="technical"] .road-list .b { padding-top: 2px; color: #91a6b6; font-family: var(--font-en); font-size: 13px; }
body[data-page="technical"] .road-card:nth-child(2) .road-list li:nth-child(-n+2) > span:last-child { color: var(--tech-ink); font-size: 16px; font-weight: 600; font-variant-numeric: tabular-nums; }

/* Footer and existing contact dialog also stay light. */
body[data-page="technical"] footer { padding-block: 76px 28px; color: var(--tech-body); background: #fff; border-top: 0; }
body[data-page="technical"] footer .credits { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr); gap: 40px; padding-bottom: 40px; color: var(--tech-muted); border: 0; }
body[data-page="technical"] .credit-label { margin-bottom: 22px; color: var(--tech-ink); font-family: var(--font-en); font-size: 12px; font-weight: 600; letter-spacing: .05em; }
body[data-page="technical"] .credit-list { gap: 16px; }
body[data-page="technical"] .credit-list li { grid-template-columns: 12px minmax(0, 1fr); gap: 10px; font-family: var(--font-en); font-size: 13px; line-height: 1.8; overflow-wrap: anywhere; }
body[data-page="technical"] .credit-list .b { color: #8da3b3; }
body[data-page="technical"] .credit-list .r { color: #334155; font-weight: 500; }
body[data-page="technical"] .credit-list [style*="white-space"] { white-space: normal !important; }
body[data-page="technical"] .credit-note { color: #718096; font-family: var(--font-en); font-size: 12px; line-height: 1.8; }
body[data-page="technical"] .foot { gap: 16px; padding-top: 24px; border-top-color: var(--tech-line); color: #64748b; font-family: var(--font-en); font-size: 11px; letter-spacing: .01em; }
body[data-page="technical"] .foot .slogan { color: var(--tech-accent); }
body[data-page="technical"] .modal { background: rgba(15, 23, 42, .32); backdrop-filter: none; }
body[data-page="technical"] .modal-panel { width: min(700px, calc(100vw - 32px)); max-height: calc(100dvh - 40px); padding: 30px; border: 1px solid var(--tech-line); border-radius: 18px; background: #fff; box-shadow: 0 16px 56px rgba(15, 23, 42, .14); overflow-y: auto; }
body[data-page="technical"] .modal-head h3 { font-size: 20px; font-weight: 600; line-height: 1.6; }
body[data-page="technical"] .modal-close { flex-shrink: 0; min-width: 40px; min-height: 40px; color: var(--tech-muted); background: #f8fafc; border: 1px solid var(--tech-line); border-radius: 8px; }
body[data-page="technical"] .contact-row { padding-block: 18px; border-color: #edf0f3; background: #fff; box-shadow: none; font-size: 14px; }
body[data-page="technical"] .contact-row .k { font-family: var(--font-en); font-size: 12px; color: var(--tech-muted); }
body[data-page="technical"] .contact-row a:not(.btn) { color: var(--tech-accent); overflow-wrap: anywhere; }
body[data-page="technical"] .to-top { color: #475569; background: #fff; border: 1px solid var(--tech-line); box-shadow: 0 2px 10px rgba(15, 23, 42, .06); }

/* Existing navigation switches to its menu presentation before labels crowd. */
@media (max-width: 1320px) {
  body[data-page="technical"] .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    inset-inline: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px 16px;
    max-height: calc(100dvh - 76px);
    padding: 18px 32px 24px;
    overflow-y: auto;
    background: #fff;
    border-bottom: 1px solid var(--tech-line);
    box-shadow: 0 10px 20px rgba(15, 23, 42, .04);
  }
  body[data-page="technical"] .nav-links.open { display: grid; }
  body[data-page="technical"] .nav-links a { min-height: 46px; padding: 12px; font-size: 14px; border: 0; }
  body[data-page="technical"] .nav-links a::after { top: auto; bottom: 4px; left: 12px; right: 12px; height: 2px; width: auto; }
  body[data-page="technical"] .nav-toggle { display: grid; place-items: center; }
}
@media (max-width: 1000px) {
  body[data-page="technical"] :is(.wrap, section > .wrap) { width: calc(100% - 64px); }
  body[data-page="technical"] .fw-role-grid { grid-template-columns: 1fr; }
  body[data-page="technical"] .fw-role-head { display: flex; flex-wrap: wrap; gap: 10px; }
  body[data-page="technical"] .fw-file { margin-top: 0; }
  body[data-page="technical"] .safety-head { gap: 32px; }
  body[data-page="technical"] .road { grid-template-columns: 1fr; }
  body[data-page="technical"] footer .credits { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
}
@media (max-width: 700px) {
  body[data-page="technical"] { --page-nav-height: 68px; font-size: 15px; }
  body[data-page="technical"] :is(.wrap, section > .wrap) { width: calc(100% - 40px); }
  body[data-page="technical"] .nav,
  body[data-page="technical"] .nav.stuck { min-height: 68px; }
  body[data-page="technical"] .nav-inner,
  body[data-page="technical"] .nav.stuck .nav-inner { width: calc(100% - 28px); min-height: 68px; gap: 8px; padding-block: 10px; }
  body[data-page="technical"] .brand { gap: 7px; font-size: 10px; letter-spacing: .08em; }
  body[data-page="technical"] .brand-logo { width: 32px; height: 32px; border-radius: 7px; }
  body[data-page="technical"] .nav-right { gap: 6px; }
  body[data-page="technical"] .lang { padding: 2px; }
  body[data-page="technical"] .lang button { min-height: 32px; padding-inline: 8px; font-size: 11px; }
  body[data-page="technical"] .nav .btn { width: 40px; min-width: 40px; height: 42px; min-height: 42px; padding-inline: 10px; }
  body[data-page="technical"] .nav-toggle { width: 42px; height: 42px; }
  body[data-page="technical"] .nav-links { top: 100%; max-height: calc(100dvh - 68px); padding: 12px 20px 20px; grid-template-columns: minmax(0, 1fr); }
  body[data-page="technical"] .nav-links a { min-height: 46px; padding: 12px 8px; border-bottom: 1px solid #f0f3f6; }
  body[data-page="technical"] .nav-links a::after { display: none; }
  body[data-page="technical"] .nav-links a.active { background: #f3fafc; }
  body[data-page="technical"] #deepdive { padding-block: 72px 80px; }
  body[data-page="technical"] .sec-head { margin-bottom: 40px; }
  body[data-page="technical"] .sec-head h2,
  body[data-page="technical"] .sec-head h2.l-zh,
  body[data-page="technical"] .sec-head h2.l-en { margin-top: 18px; font-size: clamp(34px, 9.5vw, 42px); line-height: 1.28; }
  body[data-page="technical"] .sec-head h2.l-zh { line-height: 1.38; }
  body[data-page="technical"] .sec-head .sec-note { margin-top: 20px; font-size: 14px; line-height: 1.9; }
  body[data-page="technical"] .acc { gap: 10px; margin-top: 0; }
  body[data-page="technical"] .acc-head,
  body[data-page="technical"] .safety-block .acc-head { min-height: 76px; padding: 22px 20px; gap: 12px; }
  body[data-page="technical"] .acc-head .t { font-size: 15px; line-height: 1.75; }
  body[data-page="technical"] .acc-inner,
  body[data-page="technical"] .safety-block .acc-inner { padding: 0 20px 24px; }
  body[data-page="technical"] .acc-inner .body-text { font-size: 14px !important; line-height: 1.9; }
  body[data-page="technical"] .fw-role { padding: 22px; }
  body[data-page="technical"] .fw-role-head { display: block; }
  body[data-page="technical"] .fw-role-head h4 { font-size: 16px; }
  body[data-page="technical"] .fw-file { margin-top: 10px; }
  body[data-page="technical"] .fw-flow { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; justify-items: stretch; padding: 20px; overflow-x: auto; }
  body[data-page="technical"] .fw-flow-label { min-width: 0; margin-bottom: 8px; font-size: 13px; }
  body[data-page="technical"] .fw-step { width: 100%; min-width: 0; white-space: normal; padding-block: 11px; font-size: 13px; }
  body[data-page="technical"] .fw-arrow { transform: rotate(90deg); justify-self: center; line-height: 1; }
  body[data-page="technical"] pre.code { margin-block: 22px; padding: 20px; font-size: 13px; line-height: 1.9; }
  body[data-page="technical"] :is(th, td) { padding: 15px 18px; }
  body[data-page="technical"] #a-packet .specs { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  body[data-page="technical"] .safety-block { margin-top: 80px; padding-top: 56px; }
  body[data-page="technical"] .safety-head { grid-template-columns: minmax(0, 1fr); gap: 24px; margin-bottom: 30px; }
  body[data-page="technical"] .safety-head h3 { font-size: 28px; line-height: 1.5; }
  body[data-page="technical"] .safety-head p { font-size: 14px; }
  body[data-page="technical"] .safety-status { gap: 6px; }
  body[data-page="technical"] .safety-status > span { padding-inline: 8px; font-size: 9px; letter-spacing: .04em; }
  body[data-page="technical"] .safety-block .acc-head .t { gap: 10px; align-items: flex-start; }
  body[data-page="technical"] .safety-num { width: 26px; height: 26px; }
  body[data-page="technical"] .safety-note { padding: 16px; font-size: 12px; }
  body[data-page="technical"] #roadmap { padding-block: 72px 80px; }
  body[data-page="technical"] #roadmap .sec-head h2 { font-size: 30px; line-height: 1.4; }
  body[data-page="technical"] #roadmap .sec-head { margin-bottom: 36px; }
  body[data-page="technical"] .road { gap: 16px; }
  body[data-page="technical"] .road-card { padding: 26px; }
  body[data-page="technical"] .road-card h3 { font-size: 19px; }
  body[data-page="technical"] footer { padding-block: 64px 24px; }
  body[data-page="technical"] footer .credits { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  body[data-page="technical"] .credit-label { margin-bottom: 16px; }
  body[data-page="technical"] .credit-list li { font-size: 13px; }
  body[data-page="technical"] .foot { align-items: flex-start; flex-direction: column; }
  body[data-page="technical"] .modal-panel { padding: 24px 20px; }
  body[data-page="technical"] .modal-head { align-items: flex-start; }
  body[data-page="technical"] .modal-head h3 { font-size: 17px; }
  body[data-page="technical"] .contact-row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  body[data-page="technical"] *,
  body[data-page="technical"] *::before,
  body[data-page="technical"] *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}