:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --text: #10233f;
  --muted: #51627a;
  --line: rgba(16, 35, 63, 0.1);
  --navy: #103a73;
  --blue: #1f6fff;
  --gold: #c8a96b;
  --shadow: 0 24px 70px rgba(16, 35, 63, 0.14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: min(1160px, calc(100vw - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p, li { color: var(--muted); }
.container { width: var(--container); margin: 0 auto; }
.skip-link {
  position: absolute; left: 16px; top: -44px; background: var(--navy); color: white; padding: 10px 14px; border-radius: 10px; z-index: 200;
}
.skip-link:focus { top: 16px; }
.site-header {
  position: sticky; top: 0; z-index: 100; backdrop-filter: blur(18px);
  background: rgba(249, 251, 255, 0.72); border-bottom: 1px solid rgba(16, 35, 63, 0.06);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; color: white;
  background: linear-gradient(135deg, var(--navy), var(--blue)); font-weight: 800; letter-spacing: 0.08em;
}
.brand-text { display: flex; flex-direction: column; font-size: 0.78rem; color: var(--muted); }
.brand-text strong { color: var(--text); font-size: 0.92rem; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--muted); font-weight: 500; }
.site-nav a:hover { color: var(--navy); }
.nav-toggle {
  display: none; border: 0; background: transparent; width: 46px; height: 46px; padding: 0; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; background: var(--text); margin: 4px auto; border-radius: 999px;
}
.hero-section {
  position: relative; min-height: min(960px, calc(100vh - 76px)); display: flex; align-items: center; overflow: hidden;
  background:
    linear-gradient(90deg, rgba(9, 27, 55, 0.72) 0%, rgba(9, 27, 55, 0.56) 36%, rgba(9, 27, 55, 0.24) 62%, rgba(9, 27, 55, 0.1) 100%),
    url('../../hero-desktop.jpg') center/cover no-repeat;
}
.hero-backdrop {
  position: absolute; inset: 0; background: linear-gradient(180deg, rgba(244, 247, 251, 0) 62%, rgba(244, 247, 251, 0.92) 100%);
}
.hero-grid {
  position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr); gap: 32px; padding: 72px 0 96px;
}
.hero-copy {
  color: white; max-width: 700px; padding: 32px; border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(10, 26, 52, 0.58), rgba(10, 26, 52, 0.38));
  border: 1px solid rgba(255,255,255,0.12); box-shadow: var(--shadow);
}
.eyebrow, .section-kicker, .panel-label, .card-tag {
  text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.78rem; font-weight: 700;
}
.eyebrow { color: rgba(255,255,255,0.72); margin-bottom: 18px; }
.hero-copy h1, .page-hero h1 {
  margin: 0; font-size: clamp(2.6rem, 5vw, 4.9rem); line-height: 1.08; letter-spacing: -0.03em;
}
.hero-copy h1 span, .page-hero h1 span { display: inline-block; margin-top: 10px; font-size: clamp(1.35rem, 2.8vw, 2.2rem); color: #dfeaff; }
.hero-role, .hero-thesis, .lead { font-size: 1.05rem; margin-top: 24px; max-width: 58ch; }
.hero-role, .hero-thesis { color: rgba(255,255,255,0.92); }
.hero-role span, .hero-thesis span { color: rgba(231, 239, 255, 0.86); }
.lead { color: var(--muted); }
.hero-actions, .card-actions, .section-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 22px; border-radius: 999px;
  font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; border: 1px solid transparent;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(135deg, #f7f9ff, #dbe8ff); color: var(--navy); box-shadow: 0 10px 30px rgba(15, 59, 115, 0.2); }
.button-secondary { background: rgba(255,255,255,0.08); color: white; border: 1px solid rgba(255,255,255,0.26); }
.button-tertiary { background: rgba(16, 58, 115, 0.06); color: var(--navy); border-color: rgba(16, 58, 115, 0.1); }
.subpage-main .button-secondary, .content-card .button-secondary, .section-actions .button-secondary { background: rgba(16, 58, 115, 0.08); color: var(--navy); border-color: rgba(16, 58, 115, 0.1); }
.hero-panel {
  align-self: end; background: rgba(255, 255, 255, 0.9); border-radius: var(--radius-lg); padding: 18px; box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.4);
}
.hero-panel img { border-radius: 22px; aspect-ratio: 4 / 5; object-fit: cover; }
.hero-panel-copy { padding: 18px 6px 8px; }
.panel-label { color: var(--blue); margin-bottom: 12px; }
.hero-panel ul { margin: 0; padding-left: 18px; }
.page-hero {
  padding: 84px 0 32px;
}
.page-hero-compact {
  background: linear-gradient(180deg, rgba(255,255,255,0.82), rgba(241,246,252,0.92));
  border-bottom: 1px solid var(--line);
}
.page-hero-inner {
  padding: 24px 0 8px;
}
.page-hero h1 span { color: var(--navy); }
.section { padding: 92px 0; }
.section-alt { background: rgba(255,255,255,0.55); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.intro-band { padding-top: 36px; }
.intro-grid, .section-grid, .section-heading-row, .footer-inner {
  display: grid; gap: 24px;
}
.intro-grid, .section-heading-row { grid-template-columns: 1.1fr 1fr; align-items: end; }
.about-grid, .thesis-grid, .contact-grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
.section-kicker { color: var(--blue); margin-bottom: 14px; }
.section h2, .feature-card h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.14; letter-spacing: -0.03em; }
.feature-card h2 { font-size: 1.6rem; }
.feature-card h3 { margin-top: 0; font-size: 1.45rem; }
.feature-card h3 span, .feature-card h2 span { display: inline-block; margin-top: 8px; font-size: 1rem; color: var(--muted); font-weight: 600; }
.info-card-stack, .card-grid { display: grid; gap: 22px; }
.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.four-up { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-card, .feature-card, .thesis-card, .contact-card, .content-card {
  padding: 28px; border-radius: var(--radius-md); background: var(--surface-strong); border: 1px solid var(--line); box-shadow: 0 18px 50px rgba(16, 35, 63, 0.08);
}
.feature-card.subtle { background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(243,247,252,0.96)); }
.feature-card-link { display: flex; flex-direction: column; justify-content: space-between; }
.card-tag { color: var(--gold); display: inline-block; margin-bottom: 14px; }
.contact-card a, .link-list a { font-size: 1.02rem; font-weight: 700; color: var(--navy); }
.contact-list p { margin: 0 0 12px; }
.hero-actions.compact, .card-actions.stacked { margin-top: 20px; }
.card-actions.stacked { align-items: stretch; }
.article-layout { display: grid; gap: 22px; }
.detail-list { margin: 0; padding-left: 20px; }
.link-list { display: grid; gap: 10px; margin-top: 18px; }
.section-actions.center { justify-content: center; }
.contact-card-wide { grid-column: 1 / -1; }
.site-footer { padding: 28px 0 44px; }
.footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); padding-top: 22px; }
.footer-inner p:last-child { text-align: right; }

@media (max-width: 980px) {
  .hero-grid, .intro-grid, .section-heading-row, .about-grid, .thesis-grid, .contact-grid, .three-up, .four-up, .two-up, .footer-inner {
    grid-template-columns: 1fr;
  }
  .hero-panel { max-width: 360px; }
  .contact-card-wide { grid-column: auto; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute; top: calc(100% + 10px); right: 20px; left: 20px; display: none; flex-direction: column; align-items: flex-start;
    background: rgba(255,255,255,0.96); padding: 18px; border-radius: 18px; box-shadow: var(--shadow); border: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .hero-section {
    background:
      linear-gradient(180deg, rgba(9, 27, 55, 0.68) 0%, rgba(9, 27, 55, 0.56) 40%, rgba(9, 27, 55, 0.4) 100%),
      url('../../hero-mobile.jpg') center/cover no-repeat;
  }
  .hero-grid { padding: 44px 0 72px; }
  .hero-copy { padding: 24px; }
  .hero-role, .hero-thesis, .lead { font-size: 0.98rem; }
  .section { padding: 76px 0; }
  .brand-text span { display: none; }
}

@media (max-width: 520px) {
  :root { --container: min(100vw - 24px, 1160px); }
  .header-inner { min-height: 70px; }
  .hero-copy h1, .page-hero h1 { font-size: 2.3rem; }
  .button { width: 100%; }
  .hero-panel { max-width: 100%; }
}