/* ==========================================================================
   China Building Technique Group (CBTGC) — Australia-New Zealand Division
   Shared stylesheet — assets/css/styles.css
   Design system: deep-blue corporate, white content, cool-grey bands,
   steel-blue accents, restrained CTA accent. Mobile-first, no framework.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette — deep blue primary */
  --color-navy: #0b3d72;          /* primary deep blue */
  --color-navy-deep: #082c54;     /* darker navy (hero overlay, footer) */
  --color-blue: #0e4c92;          /* secondary corporate blue */
  --color-steel: #3f6d9e;         /* steel-blue accent */
  --color-steel-soft: #6f93ba;    /* muted steel for subtle accents */
  --color-steel-light: #a9c4e0;   /* light steel for accents on dark (AA) */

  /* Restrained CTA accent — warm signal, used sparingly */
  --color-accent: #bd4d1a;        /* controlled terracotta/red-orange (AA on white) */
  --color-accent-hover: #a8430f;

  /* Neutrals */
  --color-ink: #16242f;           /* primary text */
  --color-ink-soft: #4a5963;      /* secondary text */
  --color-ink-mute: #6b7882;      /* muted / captions */
  --color-line: #dde4ea;          /* hairline borders */
  --color-line-strong: #c6d1da;
  --color-white: #ffffff;
  --color-grey-band: #f3f6f9;     /* light cool-grey section band */
  --color-blue-tint: #eaf1f8;     /* media placeholder tint */

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --fs-xs: 0.78rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: 3rem;
  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-base: 1.65;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Radius, shadow, layout */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(11, 61, 114, 0.06);
  --shadow: 0 6px 20px rgba(11, 61, 114, 0.08);
  --container: 1140px;
  --header-h: 76px;
  --transition: 180ms ease;
}

/* --------------------------------------------------------------------------
   2. Base / reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  line-height: var(--lh-snug);
  color: var(--color-navy);
  font-weight: 700;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-2xl); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a { color: var(--color-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-navy); text-decoration: underline; }

img { max-width: 100%; display: block; }

ul, ol { margin: 0 0 var(--space-4); padding-left: 1.25rem; }
li { margin-bottom: var(--space-2); }

strong { font-weight: 700; color: var(--color-ink); }

/* Accessibility — visible focus */
:focus-visible {
  outline: 3px solid var(--color-steel);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 1000;
  background: var(--color-navy);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; color: #fff; text-decoration: none; }

/* --------------------------------------------------------------------------
   3. Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section { padding-block: var(--space-7); }
.section--grey { background: var(--color-grey-band); }
.section--tint { background: var(--color-blue-tint); }

.section__head { max-width: 720px; margin-bottom: var(--space-6); }
.section__head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-steel);
  margin-bottom: var(--space-3);
}

.lead { font-size: var(--fs-md); color: var(--color-ink-soft); line-height: var(--lh-base); }

.text-mute { color: var(--color-ink-soft); }
.text-sm { font-size: var(--fs-sm); }
.text-xl { font-size: var(--fs-xl); }
.eyebrow--soft { color: var(--color-steel-soft); }

@media (min-width: 768px) {
  .container { padding-inline: var(--space-6); }
  .section { padding-block: var(--space-8); }
  h1 { font-size: var(--fs-3xl); }
  h2 { font-size: var(--fs-2xl); }
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn--primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: #fff; }

.btn--secondary { background: var(--color-navy); color: #fff; border-color: var(--color-navy); }
.btn--secondary:hover { background: var(--color-navy-deep); border-color: var(--color-navy-deep); color: #fff; }

.btn--outline { background: transparent; color: var(--color-navy); border-color: var(--color-line-strong); }
.btn--outline:hover { border-color: var(--color-navy); background: var(--color-grey-band); color: var(--color-navy); }

/* Light outline button for dark backgrounds (hero, CTA band) */
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.6); }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; color: #fff; }

/* Inline arrow link */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  color: var(--color-blue);
}
.link-arrow::after { content: "\2192"; transition: transform var(--transition); }
.link-arrow:hover { text-decoration: none; }
.link-arrow:hover::after { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   5. Header + navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: var(--header-h);
}

/* Brand lockup */
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 0.28rem;
}
.brand__mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-weight: 700; font-size: 1rem; color: var(--color-navy); letter-spacing: -0.01em; }
.brand__lockup { font-size: var(--fs-xs); color: var(--color-ink-mute); font-weight: 600; letter-spacing: 0.02em; }

/* Nav */
.nav { display: flex; align-items: center; }
.nav__list {
  list-style: none;
  display: flex;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
}
.nav__link {
  display: inline-block;
  padding: 0.55rem 0.85rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  position: relative;
}
.nav__link:hover { color: var(--color-navy); background: var(--color-grey-band); text-decoration: none; }
.nav__link[aria-current="page"] { color: var(--color-navy); }
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: -0.2rem;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.nav__cta { margin-left: var(--space-3); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line-strong);
  background: var(--color-white);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* Collapse to the toggle drawer before the 6-item nav would crowd the header */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow);
    display: none;
    padding: var(--space-4) var(--space-5) var(--space-5);
  }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; gap: 0; }
  .nav__link { display: block; padding: 0.85rem 0.5rem; border-bottom: 1px solid var(--color-line); border-radius: 0; }
  .nav__link[aria-current="page"]::after { left: 0.5rem; right: auto; width: 24px; bottom: 0.5rem; }
  .nav__cta { margin: var(--space-4) 0 0; }
  .nav__cta .btn { width: 100%; }
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero { position: relative; background: var(--color-navy-deep); color: #fff; overflow: hidden; }
.hero__media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(8, 44, 84, 0.94) 0%, rgba(11, 61, 114, 0.80) 50%, rgba(14, 76, 146, 0.55) 100%),
    url("../img/hero-home.jpg") center / cover no-repeat,
    var(--color-blue);
}
.hero__media::after {
  /* subtle engineering grid texture, no decorative gradient */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.5;
}
.hero__inner {
  position: relative;
  z-index: 1;
  padding-block: var(--space-8);
  max-width: 760px;
}
.hero .eyebrow { color: var(--color-steel-light); }
.hero h1 { color: #fff; font-size: clamp(2rem, 5vw, 3.25rem); margin-bottom: var(--space-5); }
.hero__sub { font-size: var(--fs-md); color: rgba(255, 255, 255, 0.88); max-width: 620px; margin-bottom: var(--space-6); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }

@media (min-width: 768px) { .hero__inner { padding-block: var(--space-9); } }

/* --------------------------------------------------------------------------
   7. Intro / credibility strip
   -------------------------------------------------------------------------- */
.intro-strip { background: var(--color-grey-band); border-bottom: 1px solid var(--color-line); }
.intro-strip__inner { padding-block: var(--space-6); }
.intro-strip p { font-size: var(--fs-md); color: var(--color-ink-soft); max-width: 920px; margin: 0; }
.intro-strip strong { color: var(--color-navy); }

/* --------------------------------------------------------------------------
   8. Grids
   -------------------------------------------------------------------------- */
.grid { display: grid; gap: var(--space-5); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 600px) {
  .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: 960px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* --------------------------------------------------------------------------
   9. Cards (service / sector)
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover { border-color: var(--color-steel-soft); box-shadow: var(--shadow); transform: translateY(-2px); }
.card__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--color-blue-tint);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
  font-weight: 800;
  font-size: var(--fs-md);
}
.card h3 { font-size: var(--fs-md); margin-bottom: var(--space-3); }
.card p { color: var(--color-ink-soft); font-size: var(--fs-sm); }
.card__link { margin-top: var(--space-4); font-size: var(--fs-sm); }

/* Sector card — compact, accent left border */
.card--sector { border-left: 3px solid var(--color-steel); }
.card--sector h3 { margin-bottom: var(--space-2); }

/* Linkable whole card */
a.card { text-decoration: none; color: inherit; }
a.card:hover { text-decoration: none; }

/* --------------------------------------------------------------------------
   10. Sector tags (inline pill row)
   -------------------------------------------------------------------------- */
.tag-row { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-5); list-style: none; padding-left: 0; }
.tag {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-white);
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
}

/* --------------------------------------------------------------------------
   11. Stat / proof panel
   -------------------------------------------------------------------------- */
.proof { background: var(--color-navy); color: #fff; border-radius: var(--radius-lg); padding: var(--space-7) var(--space-6); }
.proof h2 { color: #fff; }
.proof .lead { color: rgba(255, 255, 255, 0.85); }
.proof__grid { display: grid; gap: var(--space-5); grid-template-columns: 1fr; margin-top: var(--space-6); }
@media (min-width: 768px) { .proof__grid { grid-template-columns: repeat(3, 1fr); } }
.proof__item { border-top: 2px solid var(--color-steel); padding-top: var(--space-4); }
.proof__item h3 { color: #fff; font-size: var(--fs-md); margin-bottom: var(--space-2); }
.proof__item p { color: rgba(255, 255, 255, 0.82); font-size: var(--fs-sm); }

/* Numeric stat variant */
.stat__num { font-size: var(--fs-2xl); font-weight: 800; color: #fff; line-height: 1; display: block; margin-bottom: var(--space-2); }
.stat__label { font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.82); }

/* --------------------------------------------------------------------------
   12. Project grid
   -------------------------------------------------------------------------- */
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.project-card:hover { border-color: var(--color-steel-soft); box-shadow: var(--shadow); transform: translateY(-2px); }
.project-card__body { padding: var(--space-5); }
.project-card__name { font-size: var(--fs-md); margin-bottom: var(--space-2); color: var(--color-navy); }
.project-card__meta { font-size: var(--fs-sm); color: var(--color-ink-soft); margin-bottom: var(--space-3); }
.project-card__scope { font-size: var(--fs-sm); color: var(--color-ink-soft); margin: 0; }
.project-card__award {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-steel);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   13. Media placeholder
   -------------------------------------------------------------------------- */
.media {
  position: relative;
  display: grid;
  place-items: center;
  background:
    repeating-linear-gradient(135deg, var(--color-blue-tint) 0 18px, #e3edf7 18px 36px);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  color: var(--color-steel);
  min-height: 200px;
  overflow: hidden;
}
.media::before {
  content: "";
  position: absolute;
  width: 38px;
  height: 38px;
  border: 2px solid var(--color-steel-soft);
  border-radius: var(--radius-sm);
  opacity: 0.6;
}
.media__caption {
  position: relative;
  z-index: 1;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-steel);
  background: rgba(255, 255, 255, 0.85);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-top: 52px;
}
.media--ratio { aspect-ratio: 16 / 10; min-height: 0; }
.media--ratio .media__caption { margin-top: 0; }
.project-card .media { border: none; border-bottom: 1px solid var(--color-line); border-radius: 0; aspect-ratio: 16 / 10; min-height: 0; }
.project-card .media__caption { margin-top: 0; }

/* --------------------------------------------------------------------------
   14. Split / feature row (text + media)
   -------------------------------------------------------------------------- */
.split { display: grid; gap: var(--space-6); align-items: center; }
@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .split--media-first .split__media { order: -1; }
}

/* --------------------------------------------------------------------------
   15. CTA band
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  background: var(--color-navy);
  color: #fff;
  overflow: hidden;
}
.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}
.cta-band__inner {
  position: relative;
  z-index: 1;
  padding-block: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  align-items: flex-start;
}
.cta-band h2 { color: #fff; max-width: 640px; }
.cta-band p { color: rgba(255, 255, 255, 0.85); max-width: 640px; font-size: var(--fs-md); }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }
@media (min-width: 768px) {
  .cta-band__inner { flex-direction: row; align-items: center; justify-content: space-between; }
  .cta-band__actions { flex: none; }
}

/* --------------------------------------------------------------------------
   16. Inner-page header + breadcrumb
   -------------------------------------------------------------------------- */
.page-header { background: var(--color-navy); color: #fff; position: relative; overflow: hidden; }
.page-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-header__inner { position: relative; z-index: 1; padding-block: var(--space-7); max-width: 760px; }
.page-header h1 { color: #fff; margin-bottom: var(--space-3); }
.page-header p { color: rgba(255, 255, 255, 0.85); font-size: var(--fs-md); margin: 0; }

.breadcrumb { font-size: var(--fs-sm); margin-bottom: var(--space-4); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0; padding: 0; }
.breadcrumb li { margin: 0; display: flex; align-items: center; gap: var(--space-2); }
.breadcrumb li:not(:last-child)::after { content: "\203A"; color: var(--color-steel-light); }
.breadcrumb a { color: var(--color-steel-light); font-weight: 600; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb [aria-current="page"] { color: rgba(255, 255, 255, 0.7); }

/* --------------------------------------------------------------------------
   17. Footer
   -------------------------------------------------------------------------- */
.site-footer { background: var(--color-navy-deep); color: rgba(255, 255, 255, 0.78); }
.site-footer a { color: rgba(255, 255, 255, 0.78); }
.site-footer a:hover { color: #fff; }
.footer__top { padding-block: var(--space-7); display: grid; gap: var(--space-6); }
@media (min-width: 768px) { .footer__top { grid-template-columns: 1.5fr 1fr 1fr; gap: var(--space-7); } }

.footer__brand .brand__name, .footer__brand .brand__lockup { color: #fff; }
.footer__hierarchy {
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
  color: rgba(255, 255, 255, 0.72);
  margin-top: var(--space-4);
  max-width: 38ch;
}
.footer__col h3 { color: #fff; font-size: var(--fs-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--space-4); }
.footer__nav { list-style: none; margin: 0; padding: 0; }
.footer__nav li { margin-bottom: var(--space-2); }
.footer__nav a { font-size: var(--fs-sm); }
.footer__contact { font-size: var(--fs-sm); line-height: var(--lh-base); font-style: normal; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  justify-content: space-between;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.6);
}

/* --------------------------------------------------------------------------
   18. Confirm / coming-soon placeholders
   -------------------------------------------------------------------------- */
.confirm-note {
  display: inline-block;
  font-size: var(--fs-sm);
  color: var(--color-ink-soft);
  font-style: italic;
  background: var(--color-grey-band);
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.75rem;
}

/* --------------------------------------------------------------------------
   19. Utilities
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.flow > * + * { margin-top: var(--space-4); }
.prose { max-width: 820px; }
.mt-6 { margin-top: var(--space-6); }

.check-list {
  list-style: none;
  padding-left: 0;
}
.check-list li {
  position: relative;
  padding-left: 1.5rem;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--color-steel);
}
.list-unstyled {
  list-style: none;
  padding-left: 0;
}

/* --------------------------------------------------------------------------
   20. Forms (contact enquiry)
   -------------------------------------------------------------------------- */
.form-row { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}
.form-control {
  width: 100%;
  padding: 0.75rem 0.9rem;
  font-family: inherit;
  font-size: var(--fs-base);
  color: var(--color-ink);
  background: var(--color-white);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus-visible {
  outline: none;
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(11, 61, 114, 0.15);
}
textarea.form-control { min-height: 140px; resize: vertical; }
select.form-control { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%234a5963' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.9rem center; padding-right: 2.25rem; }
.form-actions { margin-top: var(--space-5); }

/* Card modifier — dashed call-out variant */
.card--callout { background: var(--color-grey-band); border-style: dashed; justify-content: center; }

/* Capability detail framework */
.capability-stack {
  display: grid;
  gap: var(--space-5);
}
.capability-detail {
  scroll-margin-top: calc(var(--header-h) + var(--space-5));
  display: grid;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.capability-detail h3 { margin-bottom: var(--space-3); }
.capability-detail h4 {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-steel);
  margin-bottom: var(--space-2);
}
.capability-detail__body {
  display: grid;
  gap: var(--space-3);
}
.capability-detail__body ul {
  margin-bottom: 0;
}
.detail-grid {
  display: grid;
  gap: var(--space-5);
}
.case-slot-grid {
  display: grid;
  gap: var(--space-5);
}
.content-slot {
  min-height: 150px;
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
@media (min-width: 900px) {
  .capability-detail {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
    align-items: start;
    padding: var(--space-6);
  }
  .detail-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  }
  .case-slot-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Proof panel: single-column grid + legible eyebrow on dark */
.proof__grid--single { grid-template-columns: 1fr; }
@media (min-width: 768px) { .proof__grid--single { grid-template-columns: 1fr; } }
.proof .eyebrow { color: var(--color-steel-light); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* Block tags on project cases */
.tag-row--blocks { margin-top: var(--space-4); margin-bottom: 0; gap: var(--space-2); }
.tag-row--blocks .tag { padding: 0.3rem 0.7rem; font-size: var(--fs-xs); }

/* Footer brand mark: clean white logo on navy (no white chip/box) */
.site-footer .brand__mark { background: transparent; border-color: transparent; padding: 0; }
.site-footer .brand__mark img { filter: brightness(0) invert(1); }


/* ==========================================================================
   18. About-section sub-nav (tabs)
   ========================================================================== */
.section-nav { background: var(--color-white); border-bottom: 1px solid var(--color-line); }
.section-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-2); overflow-x: auto; -webkit-overflow-scrolling: touch; }
.section-nav li { margin: 0; flex: none; }
.section-nav a { display: inline-block; padding: var(--space-4) var(--space-3); font-size: var(--fs-sm); font-weight: 600; color: var(--color-ink-soft); border-bottom: 2px solid transparent; white-space: nowrap; }
.section-nav a:hover { color: var(--color-navy); text-decoration: none; }
.section-nav a[aria-current="page"] { color: var(--color-navy); border-bottom-color: var(--color-accent); }

/* ==========================================================================
   19. Timeline (history)
   ========================================================================== */
.timeline { margin-top: var(--space-6); max-width: 760px; }
.timeline__item { position: relative; padding-left: var(--space-7); padding-bottom: var(--space-6); border-left: 2px solid var(--color-line); margin-left: 6px; }
.timeline__item:last-child { padding-bottom: 0; border-left-color: transparent; }
.timeline__item::before { content: ""; position: absolute; left: -8px; top: 4px; width: 14px; height: 14px; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 3px var(--color-white); }
.timeline__year { display: inline-block; font-size: var(--fs-lg); font-weight: 800; color: var(--color-navy); margin-bottom: var(--space-1); letter-spacing: -0.01em; }
.timeline__item h3 { font-size: var(--fs-md); margin-bottom: var(--space-2); }
.timeline__item p { color: var(--color-ink-soft); margin: 0; }

/* ==========================================================================
   20. Figure / stat grid (light background)
   ========================================================================== */
.figure-grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(2, 1fr); margin-top: var(--space-6); }
@media (min-width: 768px) { .figure-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 960px) { .figure-grid { grid-template-columns: repeat(4, 1fr); } }
.figure { background: var(--color-white); border: 1px solid var(--color-line); border-radius: var(--radius); padding: var(--space-5); }
.figure__num { display: block; font-size: var(--fs-2xl); font-weight: 800; color: var(--color-navy); line-height: 1; margin-bottom: var(--space-2); }
.figure__label { font-size: var(--fs-sm); color: var(--color-ink-soft); }


/* ==========================================================================
   21. Coverage maps (Scope of Services)
   ========================================================================== */
.coverage-map { position: relative; width: 100%; margin: 0 auto; }
.coverage-map img { width: 100%; height: auto; display: block; }
.coverage-map--world { max-width: 920px; }
.coverage-map--china { max-width: 620px; }
.map-pin { position: absolute; width: 12px; height: 12px; border-radius: 50%; background: var(--color-accent); border: 2px solid #fff; box-shadow: 0 1px 3px rgba(8,44,84,0.4); transform: translate(-50%, -50%); }
.map-pin--key { width: 16px; height: 16px; background: var(--color-navy); }
.map-legend { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-4); font-size: var(--fs-sm); color: var(--color-ink-soft); }
.map-legend span { display: inline-flex; align-items: center; gap: var(--space-2); }
.map-legend i { width: 12px; height: 12px; border-radius: 50%; display: inline-block; border: 2px solid #fff; box-shadow: 0 1px 3px rgba(8,44,84,0.4); }
.map-legend i.is-key { background: var(--color-navy); }
.map-legend i.is-pin { background: var(--color-accent); }

.media--photo { background: none; border: none; }
.media--photo::before { content: none; }
.media--photo img { width: 100%; height: 100%; object-fit: cover; display: block; border-radius: inherit; }