:root {
  --bg: #ffffff;
  --bg-soft: #f7f9fa;
  --bg-elev: #f0f3f5;
  --bg-mist: #f3f6f8;
  --bg-tint: #eef4f7;
  --fg: #1a1f22;
  --muted: #8a9294;
  --accent: #006090;
  --accent-soft: rgba(0, 96, 144, 0.10);
  --grey: #606464;
  --line: rgba(26, 31, 34, 0.08);
  --line-strong: rgba(26, 31, 34, 0.12);
  --font: "Helvetica Neue", Helvetica, Arial, "PingFang HK", "Noto Sans TC", sans-serif;
  --max: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; font-weight: 500; letter-spacing: 0.01em; color: var(--fg); }
p { color: var(--muted); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--fg); color: var(--bg);
  padding: 0.5rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ——— Header ——— */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem var(--pad);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 8px 28px rgba(26, 31, 34, 0.06);
  background: rgba(255, 255, 255, 0.96);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  line-height: 1.15;
}
.logo img {
  height: 40px;
  width: 40px;
  border-radius: 9px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.logo-zh {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: 0.02em;
}
.logo-en {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey);
}
.nav { display: flex; gap: 1.15rem; align-items: center; font-size: 0.88rem; }
.nav a { color: var(--muted); transition: color 0.2s ease; }
.nav a:hover { color: var(--fg); }
.nav-cta {
  color: var(--accent) !important;
  border: 1px solid rgba(0, 96, 144, 0.35);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-soft);
}
.nav-cta:hover {
  border-color: var(--accent);
  background: rgba(0, 96, 144, 0.16);
  color: var(--accent) !important;
}
.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  border-radius: 8px;
  width: 2.5rem; height: 2.5rem;
  cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle span {
  display: block; width: 1.1rem; height: 1.5px;
  background: var(--fg); position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute; left: 0; width: 100%; height: 1.5px;
  background: var(--fg);
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

/* ——— Sections ——— */
.scene {
  position: relative;
  padding: clamp(4rem, 11vh, 6.5rem) var(--pad);
}
.scene-inner { max-width: var(--max); margin: 0 auto; }
.section-head { max-width: 40rem; margin-bottom: 2.5rem; }
.section-head h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}
.section-head p { margin: 0; max-width: 36rem; color: var(--grey); }
.section-kicker,
.eyebrow {
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 0.85rem;
  text-transform: uppercase;
}
.section-index {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.65rem;
  font-variant-numeric: tabular-nums;
}
.ground-mist { background: var(--bg-mist); }
.ground-tint { background: var(--bg-tint); }
.ground-soft { background: var(--bg-soft); }

/* ——— Hero ——— */
.scene-hero {
  min-height: min(88vh, 760px);
  display: flex;
  align-items: flex-end;
  padding-top: 7rem;
  padding-bottom: clamp(3.5rem, 8vh, 5.5rem);
  background:
    linear-gradient(165deg, rgba(238, 244, 247, 0.95) 0%, rgba(255, 255, 255, 0.92) 48%, #fff 100%),
    radial-gradient(ellipse 80% 55% at 85% 15%, rgba(0, 96, 144, 0.12), transparent 60%);
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: end;
  width: 100%;
}
.hero-copy h1 {
  font-size: clamp(2.15rem, 5.2vw, 3.35rem);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  max-width: 14em;
}
.hero-lead {
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  color: var(--grey);
  max-width: 34rem;
  margin: 0 0 1.75rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.25rem;
  font-size: 0.82rem;
  color: var(--grey);
}
.hero-meta strong { color: var(--fg); font-weight: 500; }
.hero-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.35rem 1.4rem;
  box-shadow: 0 16px 40px rgba(26, 31, 34, 0.06);
}
.hero-card h2 {
  font-size: 1.05rem;
  margin: 0 0 0.85rem;
}
.hero-card dl {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}
.hero-card dt {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.15rem;
}
.hero-card dd {
  margin: 0;
  color: var(--fg);
  font-size: 0.95rem;
  font-weight: 500;
}
.hero-card .licence {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-size: 0.95rem;
  border: 1px solid var(--line-strong);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: #0072a8;
  border-color: #0072a8;
}
.btn-ghost {
  color: var(--fg);
  background: var(--bg);
  border-color: rgba(96, 100, 100, 0.35);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ——— Services ——— */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.service-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  padding: 1.4rem 1.45rem;
  transition: border-color 0.2s ease, box-shadow 0.25s ease;
}
.service-card:hover {
  border-color: rgba(0, 96, 144, 0.3);
  box-shadow: 0 10px 28px rgba(26, 31, 34, 0.05);
}
.service-card .tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.65rem;
}
.service-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.12rem;
}
.service-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--grey);
}
.service-card ul {
  margin: 0.9rem 0 0;
  padding: 0 0 0 1.05rem;
  color: var(--fg);
  font-size: 0.9rem;
}
.service-card li { margin: 0.3rem 0; }

/* ——— MWIS note ——— */
.mwis-note {
  margin-top: 1.75rem;
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-tint);
  border-radius: 0 10px 10px 0;
  font-size: 0.9rem;
  color: var(--grey);
}
.mwis-note a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

/* ——— Process ——— */
.process-accordion {
  max-width: 42rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.process-step {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.process-step[open] {
  border-color: rgba(0, 96, 144, 0.35);
  box-shadow: 0 8px 28px rgba(26, 31, 34, 0.05);
}
.process-step summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.75rem 1rem;
  padding: 1.05rem 1.25rem;
  color: var(--fg);
  user-select: none;
}
.process-step summary::-webkit-details-marker { display: none; }
.process-step summary::after {
  content: "+";
  grid-column: 3;
  grid-row: 1 / span 2;
  align-self: center;
  color: var(--accent);
  font-size: 1.25rem;
  line-height: 1;
}
.process-step[open] summary::after { content: "−"; }
.process-num {
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.process-title { font-size: 1.05rem; font-weight: 500; }
.process-hint {
  grid-column: 2;
  font-size: 0.82rem;
  color: var(--muted);
}
.process-body {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--line);
}
.process-body p {
  margin: 1rem 0 0.75rem;
  color: var(--grey);
  font-size: 0.95rem;
}
.process-body ul {
  margin: 0;
  padding: 0 0 0 1.1rem;
  color: var(--fg);
  font-size: 0.92rem;
}
.process-body li { margin: 0.35rem 0; }
.process-step summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* ——— Trust ——— */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.trust-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  padding: 1.35rem 1.4rem;
  box-shadow: 0 8px 24px rgba(26, 31, 34, 0.035);
}
.trust-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}
.trust-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--grey);
}
.trust-card .licence-num {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* ——— Media ——— */
.media-list {
  display: grid;
  gap: 0.75rem;
}
.media-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.media-outlet {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  min-width: 5.5rem;
  padding-top: 0.15rem;
}
.media-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}
.media-item p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--grey);
}

/* ——— CTA ——— */
.scene-cta { text-align: center; }
.cta-panel {
  max-width: 40rem;
  margin: 0 auto;
}
.cta-panel h2 {
  font-size: clamp(1.85rem, 4.5vw, 2.75rem);
  margin: 0 0 0.75rem;
}
.cta-panel > p { margin: 0 auto; max-width: 30rem; color: var(--grey); }
.section-rule {
  width: 3rem;
  height: 2px;
  border: 0;
  background: var(--accent);
  margin: 1.25rem auto;
}
.cta-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 1.75rem 0 1.5rem;
}
.cta-details {
  text-align: left;
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  font-size: 0.92rem;
  color: var(--grey);
}
.cta-details strong { color: var(--fg); font-weight: 500; }
.fineprint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 1.5rem;
}

/* ——— Footer ——— */
.site-footer {
  padding: 2rem var(--pad) 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
  background: var(--bg);
}
.site-footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: baseline;
}
.site-footer a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}
.site-footer a:hover { color: var(--accent); }

/* ——— Responsive ——— */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem var(--pad) 1rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open { display: flex; }
  .nav a {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(0, 96, 144, 0.35) !important;
  }
  .media-item { grid-template-columns: 1fr; gap: 0.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}