/* pressurereliefdevice.com · site.css · M2 sample pages, version 2 (2026-10-19)
   v2 changes after the owner's first review (D024 to D027): two-row header that never wraps,
   Google Fonts Montserrat (Latin, Cyrillic) + Cairo (Arabic) + Noto Sans Mono (numbers), LTR islands for numbers and codes,
   full-width plant photo hero, dark facts band, dark footer, larger headings.
   Colors follow 04-视觉方向 v1 + 第 7 节追记: Luofu red is the only accent, steel blue secondary, ink for dark bands.
   Logical properties throughout so the same sheet serves RTL pages. */

:root {
  --red: #C7000C;
  --red-dark: #A3000A;
  --blue: #1F4E79;
  --blue-dark: #173B5C;
  --ink: #0B1F33;
  --ink-2: #44505E;
  --paper: #F4F6F8;
  --paper-2: #E9EDF1;
  --line: #D9DEE3;
  --line-strong: #5A6673;
  --white: #FFFFFF;
  --ok: #2E7D32;
  --err: #B71C1C;
  --on-dark: rgba(255, 255, 255, 0.86);
  --on-dark-strong: #FFFFFF;
  --font-sans: "Montserrat", "Cairo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Noto Sans Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --fs-body: 18px;
  --fs-small: 15px;
  --fs-h1: 40px;
  --fs-hero: 48px;
  --fs-h2: 30px;
  --fs-h3: 22px;
  --lh: 1.6;
  --measure: 72ch;
  --container: 1200px;
  --gutter: 24px;
  --radius: 4px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 72px;
}

@media (max-width: 767px) {
  :root {
    --fs-body: 17px;
    --fs-h1: 30px;
    --fs-hero: 32px;
    --fs-h2: 24px;
    --fs-h3: 20px;
    --gutter: 16px;
    --space-4: 32px;
    --space-5: 48px;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh);
  color: var(--ink);
  background: var(--white);
}
html[lang="ar"] body, [lang="ar"] { font-family: "Cairo", "Montserrat", sans-serif; }
img, svg { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 var(--space-2); font-weight: 700; color: var(--ink); }
h1 { font-size: var(--fs-h1); letter-spacing: -0.015em; }
h2 { font-size: var(--fs-h2); letter-spacing: -0.01em; }
h3 { font-size: var(--fs-h3); font-weight: 600; }
h4 { font-size: var(--fs-body); font-weight: 600; }
p, ul, ol, dl { margin: 0 0 var(--space-2); }
p, li, dd { max-width: var(--measure); }
a { color: var(--blue); text-decoration: underline; text-underline-offset: 0.15em; }
a:hover { color: var(--blue-dark); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
code, .mono, .num { font-family: var(--font-mono); font-size: 0.94em; }
.num { font-variant-numeric: tabular-nums; }
/* LTR islands: numbers, model codes, standard numbers, email stay left-to-right on RTL pages */
.ltr, .num, .mono, code, .chip, .email-link, .spec dd, .spec-mini li span:last-child, .facts-band dd, .table td.num { direction: ltr; unicode-bidi: isolate; }
small, .small { font-size: var(--fs-small); }
.muted { color: var(--ink-2); }
.lead { font-size: 1.15em; max-width: 60ch; line-height: 1.55; }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--space-4) 0; }
address { font-style: normal; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}
.skip {
  position: absolute; inset-block-start: -100px; inset-inline-start: var(--space-2);
  background: var(--blue); color: var(--white); padding: var(--space-1) var(--space-2);
  border-radius: var(--radius); z-index: 100;
}
.skip:focus { inset-block-start: var(--space-2); }

/* ---------- layout ---------- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--space-5); }
.section-paper { background: var(--paper); }
.section-tight { padding-block: var(--space-4); }
.section-head { max-width: 72ch; margin-block-end: var(--space-4); }
.section-head p { margin-block-end: 0; font-size: 1.05em; }
.grid { display: grid; gap: var(--space-3); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}
.eyebrow {
  display: inline-block; font-size: var(--fs-small); font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--red);
  margin-block-end: var(--space-1);
}
.rule-red { width: 56px; height: 4px; background: var(--red); margin-block: var(--space-1) var(--space-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; font: inherit; font-weight: 700; line-height: 1.2;
  padding: 13px 22px; border-radius: var(--radius); border: 2px solid transparent;
  text-decoration: none; cursor: pointer; text-align: center; min-height: 48px;
}
.btn-primary { background: var(--red); border-color: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); border-color: var(--red-dark); color: var(--white); }
.btn-secondary { background: var(--white); border-color: var(--blue); color: var(--blue); }
.btn-secondary:hover { background: var(--paper); color: var(--blue-dark); }
.btn-outline-light { background: transparent; border-color: var(--white); color: var(--white); }
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.12); color: var(--white); }
.btn-text { background: transparent; color: var(--blue); padding-inline: 4px; text-decoration: underline; }
.btn-text:hover { color: var(--blue-dark); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }
.btn-block { display: block; width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

/* ---------- header: top bar + main bar (D024) ---------- */
.topbar { background: var(--ink); color: var(--on-dark); font-size: 14px; }
.topbar-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); min-height: 38px; }
.topbar-info { display: flex; flex-wrap: wrap; gap: 4px var(--space-3); margin: 0; padding: 0; list-style: none; }
.topbar-info li { max-width: none; }
.topbar-info .topbar-hours { white-space: nowrap; }
.topbar-info a { color: var(--on-dark-strong); }
.topbar-hours { display: none; }
@media (min-width: 768px) { .topbar-hours { display: block; } }
.lang { display: inline-flex; margin: 0; }
.lang a {
  padding: 8px 9px; text-decoration: none; color: var(--on-dark); font-family: var(--font-mono);
  font-size: 13px; letter-spacing: 0.04em; border-inline-start: 1px solid rgba(255, 255, 255, 0.18);
}
.lang a:first-child { border-inline-start: 0; }
.lang a[aria-current="true"] { background: var(--red); color: var(--white); }
.lang a:hover { color: var(--white); background: rgba(255, 255, 255, 0.12); }
.lang a[aria-current="true"]:hover { background: var(--red); }

.site-header { background: var(--white); border-block-end: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); min-height: 84px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); flex: none; }
.brand img { width: 50px; height: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 700; font-size: 21px; letter-spacing: -0.01em; white-space: nowrap; }
.brand-domain { font-size: 13px; color: var(--ink-2); font-family: var(--font-mono); white-space: nowrap; }
.nav-toggle {
  font: inherit; font-weight: 600; background: var(--white); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 10px 14px; min-height: 44px;
  cursor: pointer;
}
.nav-toggle[aria-expanded="true"] { background: var(--paper); }
.site-nav { display: none; width: 100%; padding-block: var(--space-2); border-block-start: 1px solid var(--line); }
.site-nav.is-open { display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.site-nav li { max-width: none; }
.site-nav li a {
  display: block; padding: 10px 8px; text-decoration: none; color: var(--ink); font-weight: 600;
  border-radius: var(--radius); white-space: nowrap;
}
.site-nav li a:hover { background: var(--paper); color: var(--blue-dark); }
.site-nav li a[aria-current="page"] { color: var(--red); box-shadow: inset 0 -3px 0 var(--red); }
.nav-actions { display: flex; align-items: center; gap: var(--space-2); margin-block-start: var(--space-2); }
@media (max-width: 1023px) {
  .header-row { flex-wrap: wrap; }
}
@media (min-width: 1024px) {
  .nav-toggle { display: none; }
  .header-row { flex-wrap: nowrap; gap: var(--space-2); }
  .site-nav { display: flex; width: auto; flex: 1; padding: 0; border: 0; align-items: center; justify-content: flex-end; gap: var(--space-2); min-width: 0; }
  .site-nav ul { flex-direction: row; flex-wrap: nowrap; gap: 0; }
  .site-nav li a { padding: 10px clamp(5px, 0.75vw, 13px); font-size: clamp(13.5px, 1.25vw, 16px); }
  .nav-actions { margin: 0; flex: none; }
  .nav-actions .btn { padding-inline: clamp(12px, 1.6vw, 22px); font-size: clamp(14.5px, 1.3vw, 17px); }
  .brand-name { font-size: clamp(18px, 1.7vw, 21px); }
  .brand-domain { display: none; }
}
@media (min-width: 1200px) {
  .header-row { gap: var(--space-3); }
  .site-nav { gap: var(--space-3); }
  .brand-domain { display: block; }
}

/* ---------- hero with plant photo (D027) ---------- */
.hero-photo { position: relative; isolation: isolate; color: var(--on-dark-strong); min-height: 520px; display: flex; align-items: center; overflow: hidden; }
.hero-photo .hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; z-index: -2; }
.hero-photo .hero-shade { position: absolute; inset: 0; z-index: -1; background: linear-gradient(100deg, rgba(11, 31, 51, 0.92) 0%, rgba(11, 31, 51, 0.82) 45%, rgba(11, 31, 51, 0.45) 100%); }
.hero-photo .container { padding-block: var(--space-5); width: 100%; }
.hero-photo .eyebrow { color: var(--on-dark); }
.hero-photo h1 { color: var(--white); font-size: var(--fs-hero); max-width: 20ch; margin-block-end: var(--space-3); }
.hero-photo .lead { color: var(--on-dark); max-width: 58ch; margin-block-end: var(--space-4); font-size: 1.18em; }
.hero-photo .hero-credit { position: absolute; inset-block-end: 10px; inset-inline-end: var(--gutter); margin: 0; font-size: 13px; color: rgba(255, 255, 255, 0.75); }
@media (min-width: 1024px) { .hero-photo { min-height: 600px; } }

/* ---------- facts band ---------- */
.facts-band { background: var(--blue); color: var(--on-dark-strong); padding-block: var(--space-3); }
.facts-band dl { display: grid; gap: var(--space-2); margin: 0; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 1024px) { .facts-band dl { grid-template-columns: repeat(4, 1fr); } }
.facts-band div { border-inline-start: 2px solid rgba(255, 255, 255, 0.25); padding-inline-start: var(--space-2); }
.facts-band dt { font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--on-dark); }
.facts-band dd { margin: 0; font-family: var(--font-mono); font-weight: 700; font-size: 30px; line-height: 1.15; color: var(--white); }
.facts-band dd small { display: block; font-family: var(--font-sans); font-weight: 400; font-size: 14px; color: var(--on-dark); margin-block-start: 2px; }
@media (max-width: 479px) { .facts-band dl { grid-template-columns: 1fr; } .facts-band dd { font-size: 26px; } }

/* ---------- trust strip ---------- */
.trust { padding-block: var(--space-4); border-block-end: 1px solid var(--line); background: var(--white); }
.trust-row { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-4); align-items: center; }
.trust-label { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); font-weight: 700; margin: 0; flex-basis: 100%; }
.badge { display: flex; align-items: center; gap: 12px; margin: 0; }
.badge img { width: 52px; height: 72px; object-fit: cover; object-position: top; border: 1px solid var(--line); background: var(--white); }
.badge figcaption { line-height: 1.25; }
.badge-title { display: block; font-weight: 700; font-size: var(--fs-body); }
.badge-sub { display: block; font-size: 14px; color: var(--ink-2); }

/* ---------- cards ---------- */
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; flex-direction: column; overflow: hidden;
}
.card-media { background: var(--white); border-block-end: 1px solid var(--line); aspect-ratio: 16 / 10; display: flex; align-items: center; justify-content: center; padding: var(--space-2); }
.card-media img { width: 100%; height: 100%; object-fit: contain; }
.card-body { padding: var(--space-2) var(--space-3) var(--space-3); display: flex; flex-direction: column; gap: var(--space-1); flex: 1; }
.card-body h3 { margin: 0; font-size: 20px; }
.card-body h3 a { color: var(--ink); text-decoration: none; }
.card-body h3 a:hover { color: var(--blue-dark); text-decoration: underline; }
.card-body p { margin: 0; }
.chip {
  display: inline-block; font-family: var(--font-mono); font-size: 13px; color: var(--blue); font-weight: 600;
  background: var(--paper); border: 1px solid var(--line); border-radius: 3px; padding: 2px 8px;
}
.chip-red { color: var(--red); border-color: var(--red); background: var(--white); }
.spec-mini { list-style: none; margin: var(--space-1) 0 0; padding: 0; display: grid; gap: 4px; font-family: var(--font-mono); font-size: 14px; color: var(--ink-2); }
.spec-mini li { display: flex; justify-content: space-between; gap: var(--space-2); border-block-start: 1px dotted var(--line); padding-block-start: 4px; max-width: none; }
.spec-mini li span:last-child { color: var(--ink); text-align: end; }
.card-link { margin-block-start: auto; padding-block-start: var(--space-1); }
.card-paper { background: var(--paper); border-color: var(--paper-2); }
.card-paper .card-body { padding: var(--space-3); }
.card-top-red { border-block-start: 4px solid var(--red); }
@media (min-width: 1024px) {
  .card-featured { grid-column: span 2; flex-direction: row; }
  .card-featured .card-media { flex: 0 0 52%; aspect-ratio: auto; border-block-end: 0; border-inline-end: 1px solid var(--line); }
  .card-featured .card-body { justify-content: center; }
  .card-featured .card-body h3 { font-size: 24px; }
}

/* ---------- process steps ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); counter-reset: step; }
.steps li { position: relative; padding-inline-start: 60px; counter-increment: step; max-width: none; }
.steps li::before {
  content: counter(step); position: absolute; inset-inline-start: 0; inset-block-start: 0;
  width: 44px; height: 44px; border-radius: 50%; background: var(--blue); color: var(--white);
  font-family: var(--font-mono); font-weight: 700; font-size: 18px; display: flex; align-items: center; justify-content: center;
}
.steps h3 { font-size: 18px; margin-block-end: 4px; }
.steps p { margin: 0; font-size: var(--fs-small); }
@media (min-width: 1024px) {
  .steps { grid-template-columns: repeat(4, 1fr); gap: var(--space-4) var(--space-3); }
  .steps li { padding-inline-start: 0; padding-block-start: 60px; }
  .steps li::after {
    content: ""; position: absolute; inset-block-start: 22px; inset-inline-start: 52px; inset-inline-end: -24px;
    border-block-start: 2px solid var(--line);
  }
  .steps li:nth-child(4n)::after, .steps li:last-child::after { display: none; }
}

/* ---------- lists ---------- */
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-check { list-style: none; padding: 0; margin: 0 0 var(--space-2); display: grid; gap: var(--space-1); }
.list-check li { position: relative; padding-inline-start: 28px; }
.list-check li::before {
  content: ""; position: absolute; inset-inline-start: 0; inset-block-start: 0.45em;
  width: 14px; height: 14px; border: 2px solid var(--blue); border-radius: 2px;
}
ol.ol-plain { padding-inline-start: 1.4em; }
ol.ol-plain li { margin-block-end: var(--space-1); }
ol.ol-plain li::marker { font-family: var(--font-mono); color: var(--blue); font-weight: 600; }

/* ---------- end users grid ---------- */
.clients { list-style: none; margin: 0 0 var(--space-3); padding: 0; display: grid; gap: var(--space-2); grid-template-columns: repeat(2, 1fr); }
@media (min-width: 768px) { .clients { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .clients { grid-template-columns: repeat(5, 1fr); } }
.clients li { max-width: none; border: 1px solid var(--line); border-radius: var(--radius); min-height: 76px; display: flex; align-items: center; justify-content: center; text-align: center; font-weight: 700; font-size: 19px; letter-spacing: 0.01em; color: var(--ink); background: var(--white); padding: var(--space-1) var(--space-2); }

/* ---------- CTA band ---------- */
.cta-band { background: var(--blue); color: var(--white); padding-block: var(--space-5); }
.cta-band h2, .cta-band p { color: var(--white); }
.cta-band a:not(.btn) { color: var(--white); }
.cta-band .btn-primary { border-color: var(--white); }
.cta-grid { display: grid; gap: var(--space-3); align-items: center; }
@media (min-width: 1024px) { .cta-grid { grid-template-columns: 2fr 1fr; } }

/* ---------- footer (dark, D027) ---------- */
.site-footer { background: var(--ink); color: var(--on-dark); border-block-start: 4px solid var(--red); padding-block: var(--space-5) var(--space-3); font-size: var(--fs-small); }
.footer-grid { display: grid; gap: var(--space-4) var(--space-3); }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.site-footer h2 { font-size: var(--fs-body); margin-block-end: var(--space-2); color: var(--white); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-block-end: 6px; }
.site-footer a { color: var(--white); text-decoration-color: rgba(255, 255, 255, 0.4); }
.site-footer a:hover { color: var(--white); text-decoration-color: var(--white); }
.site-footer address { font-style: normal; }
.site-footer .footer-brand { display: flex; align-items: center; gap: 12px; margin-block-end: var(--space-2); }
.site-footer .footer-brand img { width: 44px; background: var(--white); border-radius: 50%; padding: 4px; }
.footer-bottom { border-block-start: 1px solid rgba(255, 255, 255, 0.15); margin-block-start: var(--space-4); padding-block-start: var(--space-2); color: rgba(255, 255, 255, 0.7); display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-3); font-size: 14px; }
.footer-bottom p { margin: 0; }

/* ---------- breadcrumb ---------- */
.breadcrumb { font-size: var(--fs-small); padding-block: var(--space-2); }
.breadcrumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.breadcrumb li { max-width: none; }
.breadcrumb li + li::before { content: "/"; color: var(--line-strong); padding-inline: 6px; }
.breadcrumb a { color: var(--ink-2); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* ---------- product page ---------- */
.page-head { padding-block: var(--space-2) var(--space-4); }
.product-layout { display: grid; gap: var(--space-4); align-items: start; }
@media (min-width: 1024px) { .product-layout { grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr); } }
.product-main > section { padding-block-end: var(--space-4); margin-block-end: var(--space-4); border-block-end: 1px solid var(--line); }
.product-main > section:last-child { border: 0; }
.figure { margin: 0 0 var(--space-3); background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2); }
.figure img { margin-inline: auto; max-height: 560px; width: auto; }
.figure figcaption { font-size: var(--fs-small); color: var(--ink-2); margin-block-start: var(--space-1); }
.figure-row { display: grid; gap: var(--space-3); }
@media (min-width: 768px) { .figure-row { grid-template-columns: 1fr 1fr; } }
.figure-row .figure { margin: 0; }
.figure-row .figure img { max-height: 420px; }
.aside-card { position: static; background: var(--paper); border: 1px solid var(--line); border-block-start: 4px solid var(--red); border-radius: var(--radius); padding: var(--space-3); }
.aside-card h2 { font-size: var(--fs-h3); }
.aside-card ol { padding-inline-start: 1.3em; margin-block-end: var(--space-3); }
.aside-card li { margin-block-end: 4px; }
.aside-card .btn { margin-block-end: var(--space-2); }
.aside-card p:last-child { margin: 0; }
.aside-card .email-link { font-size: 0.9em; }
@media (min-width: 1024px) { .aside-card { position: sticky; inset-block-start: var(--space-3); } }

/* ---------- spec table (dl) ---------- */
.spec { display: grid; grid-template-columns: 1fr; margin: 0 0 var(--space-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.spec > div { display: grid; grid-template-columns: 1fr; }
.spec > div:nth-child(even) { background: var(--paper); }
.spec dt, .spec dd { padding: 10px 14px; margin: 0; max-width: none; }
.spec dt { font-weight: 600; font-size: var(--fs-small); color: var(--ink-2); padding-block-end: 0; }
.spec dd { font-family: var(--font-mono); font-size: 15px; font-variant-numeric: tabular-nums; text-align: start; }
.spec dd .sans { font-family: var(--font-sans); font-size: var(--fs-small); }
@media (min-width: 640px) {
  .spec > div { grid-template-columns: 38% 62%; }
  .spec dt { padding-block-end: 10px; border-inline-end: 1px solid var(--line); color: var(--ink); }
}
.spec-note { font-size: var(--fs-small); color: var(--ink-2); }

/* ---------- data table ---------- */
.table-wrap { overflow-x: auto; margin-block-end: var(--space-2); border: 1px solid var(--line); border-radius: var(--radius); }
table.table { border-collapse: collapse; width: 100%; font-size: 15px; }
.table th, .table td { text-align: start; padding: 10px 12px; border-block-end: 1px solid var(--line); vertical-align: top; }
.table th { background: var(--paper); font-weight: 600; }
.table tbody tr:nth-child(even) td { background: var(--paper); }
.table td.num, .table th.num { text-align: end; font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.table tr:last-child td { border-block-end: 0; }

/* ---------- FAQ ---------- */
.faq details { border-block-start: 1px solid var(--line); }
.faq details:last-child { border-block-end: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: var(--space-2); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--blue); font-weight: 400; flex: none; }
.faq details[open] summary::after { content: "\2212"; }
.faq summary:hover { color: var(--blue-dark); }
.faq .answer { padding-block: 0 var(--space-2); }
.faq .answer p:last-child { margin: 0; }

/* ---------- forms (Quform 2 markup; styles hang on the plugin's own class names) ----------
   Structure copied from the plugin's real output: .quform > .quform-form > .quform-elements >
   .quform-element > .quform-spacer > .quform-label + .quform-inner > .quform-input > .quform-field.
   Selectors are written with three classes so they win over the plugin theme sheet whatever the load order
   (to be proven in M3 by loading the plugin CSS after this file). */
.quform .quform-elements { display: grid; gap: var(--space-2); max-width: 640px; }
.quform .quform-child-elements { display: grid; gap: var(--space-2); }
.quform .quform-element { margin: 0; }
.quform .quform-spacer { display: grid; gap: 6px; }
.quform .quform-label { margin: 0; }
.quform .quform-label .quform-label-text { font-weight: 600; color: var(--ink); }
.quform .quform-label .quform-required { color: var(--red); font-weight: 700; margin-inline-start: 2px; }
.quform .quform-inner .quform-field {
  font: inherit; color: var(--ink); background: var(--white);
  border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 10px 12px; min-height: 44px; width: 100%;
  box-shadow: none;
}
.quform .quform-inner .quform-field-textarea { min-height: 160px; resize: vertical; }
.quform .quform-inner .quform-field:focus-visible { outline: 3px solid var(--blue); outline-offset: 1px; border-color: var(--blue); }
.quform .quform-inner .quform-description { font-size: var(--fs-small); color: var(--ink-2); margin: 6px 0 0; max-width: none; }
.quform .quform-element-error .quform-field { border-color: var(--err); }
.quform .quform-inner .quform-error { margin-block-start: 6px; }
.quform .quform-inner .quform-error-text { color: var(--err); font-size: var(--fs-small); }
.quform .quform-button-submit .quform-submit {
  display: inline-block; font: inherit; font-weight: 700; line-height: 1.2; cursor: pointer;
  padding: 13px 22px; min-height: 48px; border-radius: var(--radius);
  background: var(--red); color: var(--white); border: 2px solid var(--red); box-shadow: none; text-shadow: none;
}
.quform .quform-button-submit .quform-submit:hover { background: var(--red-dark); border-color: var(--red-dark); }
.quform .quform-button-submit .quform-submit:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.quform .quform-success-message { border: 1px solid var(--ok); border-inline-start-width: 4px; background: #F1F8F2; padding: 12px 16px; border-radius: var(--radius); }
.quform .quform-success-message p { margin: 0; }
select { font: inherit; color: var(--ink); background: var(--white); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 10px 12px; min-height: 44px; width: 100%; }
.check { display: flex; align-items: flex-start; gap: 10px; }
.check input { width: 20px; height: 20px; margin-block-start: 3px; accent-color: var(--blue); }
.alert { border: 1px solid; border-inline-start-width: 4px; padding: 12px 16px; border-radius: var(--radius); margin-block-end: var(--space-2); }
.alert p { margin: 0; }
.alert-ok { border-color: var(--ok); background: #F1F8F2; }
.alert-err { border-color: var(--err); background: #FBF0F0; }
.alert-note { border-color: var(--red); background: var(--paper); }

/* ---------- misc blocks ---------- */
.two-col { display: grid; gap: var(--space-4); align-items: start; }
@media (min-width: 1024px) { .two-col { grid-template-columns: 1fr 1fr; } }
.note-box { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3); }
.note-box p:last-child, .note-box ul:last-child, .note-box ol:last-child { margin: 0; }
.note-box .email-link { font-size: 0.92em; }
.email-link { font-family: var(--font-mono); overflow-wrap: anywhere; }
.photo-figure { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--white); }
.photo-figure img { width: 100%; height: auto; }
.photo-figure figcaption { font-size: var(--fs-small); color: var(--ink-2); padding: var(--space-1) var(--space-2); }

/* ---------- certificate grid (product page) ---------- */
.cert-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); margin-block-end: var(--space-2); }
.cert-grid .badge { align-items: flex-start; }
.cert-grid .badge img { width: 56px; height: 78px; }
.cert-grid .badge-title { font-size: var(--fs-body); }
.cert-grid .badge-sub { font-size: var(--fs-small); }

/* ---------- UI standard page only ---------- */
.ui-section { padding-block: var(--space-4); border-block-end: 1px solid var(--line); }
.ui-note { color: var(--ink-2); font-size: var(--fs-small); max-width: 72ch; }
.swatches { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); margin: 0 0 var(--space-2); padding: 0; list-style: none; }
.swatch { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; max-width: none; }
.swatch-color { height: 72px; }
.swatch-name { display: block; font-weight: 600; padding: 8px 12px 0; }
.swatch-desc { display: block; padding: 0 12px 10px; font-size: 14px; color: var(--ink-2); }
.swatch-desc code { color: var(--ink); }
.type-sample { border-block-end: 1px dotted var(--line); padding-block: var(--space-2); display: grid; gap: 4px; }
.type-sample .meta { font-family: var(--font-mono); font-size: 13px; color: var(--ink-2); }
.type-sample code { overflow-wrap: anywhere; }
.demo-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; margin-block-end: var(--space-2); }
.demo-box { border: 1px dashed var(--line-strong); padding: var(--space-2); border-radius: var(--radius); }
.demo-dark { background: var(--ink); padding: var(--space-3); border-radius: var(--radius); }