:root {
  color-scheme: light;
  --ink: #192136;
  --muted: #5b6475;
  --line: #dce2ec;
  --paper: #f7f9fc;
  --white: #ffffff;
  --indigo: #3945a7;
  --indigo-dark: #252f7c;
  --mint: #b9e5d6;
  --gold: #f4c66e;
  --radius: 1.25rem;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
}

a { color: inherit; }
a:focus-visible { outline: 3px solid #e18c27; outline-offset: 3px; }

.skip-link {
  position: fixed;
  top: -4rem;
  left: 1rem;
  z-index: 10;
  padding: .6rem 1rem;
  background: var(--ink);
  color: var(--white);
  border-radius: .5rem;
}

.skip-link:focus { top: 1rem; }
.container { width: min(1120px, calc(100% - 2.5rem)); margin: 0 auto; }

.site-header {
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-weight: 800;
  letter-spacing: -.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border-radius: 50%;
  background: var(--indigo);
  color: var(--white);
  font-size: 1.05rem;
}

nav { display: flex; flex-wrap: wrap; gap: .9rem 1.25rem; }

nav a,
.site-footer a {
  color: var(--muted);
  font-size: .94rem;
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"],
.site-footer a:hover { color: var(--indigo); }

.hero {
  overflow: hidden;
  padding: clamp(4rem, 9vw, 7.5rem) 0;
  background:
    radial-gradient(circle at 82% 10%, rgba(185, 229, 214, .72), transparent 23rem),
    radial-gradient(circle at 17% 90%, rgba(244, 198, 110, .38), transparent 26rem),
    var(--white);
}

.hero-grid,
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, .7fr);
  align-items: center;
  gap: clamp(2.5rem, 7vw, 7rem);
}

.eyebrow {
  margin: 0 0 .7rem;
  color: var(--indigo);
  font-size: .77rem;
  font-weight: 800;
  letter-spacing: .12em;
}

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  line-height: 1.25;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.35rem, 5.1vw, 4.7rem);
  letter-spacing: -.055em;
}

h2 {
  max-width: 750px;
  font-size: clamp(1.85rem, 3.4vw, 3.05rem);
  letter-spacing: -.04em;
}

h3 { font-size: 1.12rem; letter-spacing: -.02em; }
p { margin: 0; }

.lead {
  max-width: 650px;
  margin-top: 1.45rem;
  color: var(--muted);
  font-size: 1.12rem;
}

.lead.small { font-size: 1.04rem; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: .7rem 1.1rem;
  border-radius: .75rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary { background: var(--indigo); color: var(--white); }
.button-primary:hover { background: var(--indigo-dark); }

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .75);
}

.button-secondary:hover { border-color: var(--indigo); color: var(--indigo); }

.principle-card,
.read-only-card {
  padding: 1.7rem;
  border: 1px solid rgba(57, 69, 167, .16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 1.5rem 4rem rgba(25, 33, 54, .08);
}

.card-label,
.status {
  margin-bottom: .8rem;
  color: var(--indigo);
  font-size: .84rem;
  font-weight: 800;
}

.principle-card ul,
.check-list {
  display: grid;
  gap: .8rem;
  margin: 1rem 0 0;
  padding-left: 1.15rem;
}

.section { padding: clamp(4rem, 8vw, 6.75rem) 0; }

.three-column {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.2rem;
}

.three-column article {
  padding: 1.45rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
}

.three-column p {
  margin-top: .8rem;
  color: var(--muted);
  font-size: .96rem;
}

.calendar-section { background: var(--ink); }
.calendar-section h2,
.calendar-section .lead { color: var(--white); }
.calendar-section .eyebrow { color: var(--mint); }
.calendar-section .lead { color: #d7dced; }
.read-only-card { background: #ffffff; box-shadow: none; }
.read-only-card h3 { margin-bottom: 1rem; }

.narrow { width: min(790px, calc(100% - 2.5rem)); }

.permission-list {
  display: grid;
  gap: 1px;
  margin-top: 2rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--line);
}

.permission-list > div {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: .8rem;
  padding: 1.3rem;
  background: var(--white);
}

.permission-number {
  color: var(--indigo);
  font-size: .88rem;
  font-weight: 800;
}

.permission-list p { margin-top: .35rem; color: var(--muted); }

.note {
  margin-top: 1.3rem;
  color: var(--muted);
  font-size: .94rem;
}

.note a,
.policy a { color: var(--indigo); font-weight: 700; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.site-footer p { color: var(--muted); font-size: .88rem; }
.site-footer div div { display: flex; flex-wrap: wrap; gap: 1rem; }

.policy-main { padding: clamp(3.5rem, 7vw, 6.5rem) 0; }

.policy {
  width: min(820px, calc(100% - 2.5rem));
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.policy h1 { font-size: clamp(2.25rem, 4.3vw, 3.7rem); }

.updated {
  margin-top: .75rem;
  color: var(--muted);
  font-size: .9rem;
}

.policy > p:not(.eyebrow):not(.updated),
.policy li {
  margin-top: 1.1rem;
  color: #3f4858;
}

.policy h2 { margin-top: 2.5rem; font-size: 1.4rem; }
.policy ul { padding-left: 1.25rem; }

.policy-note {
  margin-top: 2.3rem !important;
  padding: 1rem 1.1rem;
  border-left: .25rem solid var(--indigo);
  background: #f0f2ff;
  color: var(--ink) !important;
  font-size: .93rem;
}

@media (max-width: 720px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .hero-grid,
  .split-layout,
  .three-column { grid-template-columns: 1fr; }

  h1 { font-size: clamp(2.25rem, 12vw, 3.55rem); }
  nav { gap: .65rem 1rem; }
}