:root {
  --bg: #f7f4ee;
  --bg-soft: #fffaf1;
  --text: #1f2933;
  --muted: #617182;
  --line: rgba(31, 41, 51, 0.12);
  --accent: #2f6f73;
  --accent-dark: #1f5154;
  --accent-soft: #d9eeee;
  --card: rgba(255, 255, 255, 0.78);
  --shadow: 0 20px 60px rgba(37, 54, 69, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans TC', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(47, 111, 115, 0.16), transparent 34rem),
    linear-gradient(180deg, var(--bg), #ffffff 70%);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  padding: 0.1rem 0.35rem;
  border-radius: 0.45rem;
  background: rgba(47, 111, 115, 0.1);
  color: var(--accent-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  background: rgba(247, 244, 238, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: white;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--accent-dark);
}

.menu-toggle {
  display: none;
  border: 0;
  border-radius: 0.7rem;
  padding: 0.45rem 0.7rem;
  color: var(--text);
  background: var(--card);
  font-size: 1.25rem;
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  padding: clamp(3.4rem, 8vw, 6rem) 0;
}

.section-grid,
.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
}

.hero {
  min-height: 72vh;
  padding: clamp(4rem, 9vw, 7rem) 0;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  line-height: 1.05;
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.18;
  letter-spacing: -0.05em;
}

h3 {
  margin-bottom: 0.4rem;
  font-size: 1.15rem;
}

.hero-text,
.section-heading p,
.split-section p,
.about-section p {
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
}

.btn.primary {
  color: white;
  background: var(--accent);
  border-color: var(--accent);
}

.btn.secondary,
.hero-card,
.quick-stats article,
.post-card,
.roadmap article,
.note-grid article,
.profile-card {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-card {
  position: relative;
  overflow: hidden;
  padding: 2rem;
  border-radius: 2rem;
}

.hero-card::after {
  position: absolute;
  right: -5rem;
  bottom: -6rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: var(--accent-soft);
  content: '';
}

.status-dot {
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: #40b883;
  box-shadow: 0 0 0 0.45rem rgba(64, 184, 131, 0.12);
}

.card-label {
  margin: 1rem 0 0.3rem;
  color: var(--muted);
  font-weight: 700;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  transform: translateY(-1.5rem);
}

.quick-stats article,
.post-card,
.roadmap article,
.note-grid article,
.profile-card {
  border-radius: 1.5rem;
  padding: 1.35rem;
}

.quick-stats span {
  color: var(--accent);
  font-weight: 900;
}

.quick-stats p,
.post-card p,
.note-grid p,
.profile-card li,
.roadmap p,
.site-footer {
  color: var(--muted);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1.3rem;
}

.filter {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.filter.active,
.filter:hover {
  color: white;
  background: var(--accent);
  border-color: var(--accent);
}

.post-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.post-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.category {
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  color: var(--accent-dark);
  background: var(--accent-soft);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 1rem;
}

.tag {
  border-radius: 999px;
  padding: 0.18rem 0.5rem;
  color: var(--muted);
  background: rgba(31, 41, 51, 0.06);
  font-size: 0.82rem;
  font-weight: 700;
}

.roadmap {
  display: grid;
  gap: 1rem;
}

.pill {
  display: inline-block;
  margin-bottom: 0.65rem;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-size: 0.8rem;
  font-weight: 900;
}

.notes-section {
  border-block: 1px solid var(--line);
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.about-section {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 2rem;
  align-items: start;
}

.profile-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  font-weight: 900;
  color: var(--accent-dark);
}

@media (max-width: 860px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: rgba(255, 250, 241, 0.96);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 0.5rem;
  }

  .section-grid,
  .split-section,
  .about-section {
    grid-template-columns: 1fr;
  }

  .quick-stats,
  .post-list,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
  }
}