:root {
  --bg: #fbfbfd;
  --panel: #ffffff;
  --ink: #101828;
  --muted: #475467;
  --line: #e4e7ec;
  --primary: #0f172a;
  --accent: #111827;
  --accent-soft: #f1f5f9;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Inter", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 0% 0%, #ffffff 0%, var(--bg) 45%, #f5f7fa 100%);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

main {
  width: min(960px, 92vw);
  margin: 0 auto;
}

.container {
  padding: 2.2rem 0;
}

.hero {
  color: var(--primary);
  padding: 4.2rem 0 3.4rem;
  position: relative;
}

.topbar {
  width: min(960px, 92vw);
  margin: 0 auto;
  padding: 1.2rem 0 0.2rem;
}

.topbar a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.hero p {
  color: var(--muted);
  max-width: 66ch;
  margin-bottom: 1.8rem;
}

.hero h1 {
  margin: 0.5rem 0 0.8rem;
  font-size: clamp(1.9rem, 4vw, 3rem);
  max-width: 14ch;
  line-height: 1.2;
}

.eyebrow {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.85rem;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  padding: 0.75rem 1.2rem;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.btn-outline {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.btn:hover {
  transform: translateY(-1px);
}

.section-head {
  margin-bottom: 1rem;
}

h2 {
  margin: 0;
  color: var(--primary);
  font-size: clamp(1.4rem, 2.8vw, 1.9rem);
  line-height: 1.3;
}

.section-intro {
  color: var(--muted);
  margin: 0.6rem 0 0;
  max-width: 66ch;
}

.cards {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 1.1rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.flow li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.9rem;
  margin: 0;
}

.flow li span {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 8px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  color: var(--ink);
  font-weight: 700;
  flex-shrink: 0;
}

.cap-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 1.1rem;
}

.cap-grid article {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem;
  border-radius: 10px;
}

ol {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.35rem;
}

ul {
  padding-left: 1.2rem;
}

.links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.links a,
footer a,
.links a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.links a:hover,
footer a:hover,
a:focus-visible,
button:focus-visible {
  outline: 3px solid #d1dbe8;
  outline-offset: 2px;
}

.links a:hover,
footer a:hover {
  border-bottom-color: var(--ink);
}

footer {
  width: min(960px, 92vw);
  margin: 0 auto;
  color: var(--muted);
  padding: 2.4rem 0 2.2rem;
  border-top: 1px solid var(--line);
  margin-top: 1.2rem;
}

@media (max-width: 900px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .cap-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3.2rem;
  }

  .topbar {
    padding-top: 0.9rem;
  }

  .hero h1 {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}