:root {
  --bg: #070b0a;
  --surface: #111816;
  --surface-strong: #17211e;
  --card: #f8faf7;
  --card-muted: #edf3ef;
  --text: #f7fbf5;
  --ink: #101815;
  --muted: #b7c5bc;
  --muted-dark: #51615a;
  --accent: #d6fd51;
  --accent-strong: #9ecb19;
  --accent2: #5dd5b3;
  --line: rgba(247, 251, 245, .14);
  --line-dark: rgba(16, 24, 21, .12);
  --shadow: 0 22px 70px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
}

a { color: inherit; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem clamp(1rem, 4vw, 3rem);
  background: rgba(7, 11, 10, .78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 8px;
  background: var(--accent);
  color: #07110f;
  font-weight: 900;
}
.brand strong,
.brand small { display: block; }
.brand small {
  color: var(--muted);
  font-size: .8rem;
}

nav {
  display: flex;
  gap: .25rem;
  flex-wrap: wrap;
}
.nav-link {
  padding: .55rem .85rem;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}
.nav-link.active,
.nav-link:hover {
  background: rgba(255, 255, 255, .08);
  color: var(--text);
}

main { min-height: 72vh; }
.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, .72fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: end;
  min-height: clamp(560px, 76vh, 760px);
  padding: clamp(3rem, 8vw, 7rem) clamp(1rem, 5vw, 5rem) clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(7, 11, 10, .96) 0%, rgba(7, 11, 10, .74) 42%, rgba(7, 11, 10, .34) 100%),
    linear-gradient(180deg, rgba(7, 11, 10, .18) 0%, rgba(7, 11, 10, .78) 100%);
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-copy {
  max-width: 760px;
}
.hero h1,
.page-head h1 {
  margin: .35rem 0;
  font-size: clamp(2.45rem, 5.4vw, 4.85rem);
  line-height: 1.02;
  letter-spacing: 0;
}
.hero h1 span {
  display: block;
}
.lead,
.page-head p {
  max-width: 46rem;
  color: var(--muted);
  font-size: clamp(1.03rem, 1.6vw, 1.22rem);
}
.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: .72rem 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 850;
  text-decoration: none;
}
.button.primary {
  background: var(--accent);
  color: #07110f;
  border-color: transparent;
}
.button.secondary {
  background: rgba(255, 255, 255, .08);
  color: var(--text);
}
.button:hover {
  transform: translateY(-1px);
}

.hero-panel {
  display: grid;
  gap: .75rem;
  padding: .85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(9, 15, 13, .68);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.hero-panel span {
  display: grid;
  gap: .15rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, .07);
}
.hero-panel strong {
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.hero-panel small {
  color: var(--muted);
  font-size: .86rem;
}

.stats-section,
.topic-section,
.latest-posts-section,
.grid-section,
.platform-grid,
.faq-section,
.answer-layout,
.tool-shell {
  padding-inline: clamp(1rem, 5vw, 5rem);
}
.stats-section {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  padding-top: 0;
  padding-bottom: 0;
}
.stat-card {
  min-height: 170px;
  padding: clamp(1.1rem, 2vw, 1.5rem);
  background: var(--card);
  color: var(--ink);
}
.stat-card strong {
  display: block;
  color: var(--ink);
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: .95;
  font-variant-numeric: tabular-nums;
}
.stat-card span {
  display: block;
  max-width: 13rem;
  margin-top: .7rem;
  color: var(--muted-dark);
  font-weight: 750;
}

.grid-section {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: 1rem;
  background: var(--card);
  color: var(--ink);
}
.info-card,
.platform-card,
.note-card,
.risk-tool,
.answer-card {
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: #fff;
  padding: 1.25rem;
}
.info-card h2,
.platform-card h2,
.note-card h2,
.answer-card h2 { margin-top: 0; }
.info-card p,
.platform-card p,
.note-card p,
.answer-card p { color: var(--muted-dark); }

.section-eyebrow {
  margin: 0 0 .45rem;
  color: var(--accent-strong);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.topic-section,
.latest-posts-section {
  background: var(--card);
  color: var(--ink);
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}
.topic-section h2,
.latest-posts-section h2,
.faq-section h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.12;
}
.section-intro {
  max-width: 48rem;
  margin: .7rem 0 1.35rem;
  color: var(--muted-dark);
  font-size: 1.04rem;
}
.topic-grid,
.latest-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.topic-card,
.latest-post-card {
  display: grid;
  align-content: start;
  min-height: 100%;
  padding: 1.2rem;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: #fff;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.topic-card:hover,
.latest-post-card:hover,
.info-card:hover {
  transform: translateY(-2px);
  border-color: rgba(158, 203, 25, .55);
  box-shadow: 0 14px 36px rgba(16, 24, 21, .08);
}
.topic-card h3,
.latest-post-card h3 {
  margin: 0 0 .55rem;
  font-size: 1.18rem;
  line-height: 1.28;
}
.topic-card p,
.latest-post-card p {
  color: var(--muted-dark);
}
.tag-row {
  display: flex;
  gap: .45rem;
  flex-wrap: wrap;
  margin: .9rem 0;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  min-height: 1.8rem;
  padding: .25rem .55rem;
  border: 1px solid rgba(12, 116, 93, .2);
  border-radius: 999px;
  color: #0c745d;
  background: #eefaf6;
  font-size: .8rem;
  font-weight: 850;
}
.text-link {
  display: inline-flex;
  width: fit-content;
  margin-top: .35rem;
  color: #597800;
  font-weight: 900;
  text-decoration: none;
}
.text-link:hover { text-decoration: underline; }
.latest-post-card .post-meta {
  margin: 0 0 .45rem;
  color: #597800;
  font-size: .82rem;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.latest-post-card h3 a { text-decoration: none; }
.latest-post-card h3 a:hover { text-decoration: underline; }
.latest-posts-empty {
  margin: 0;
  color: var(--muted-dark);
}
.latest-posts-actions { margin-top: 1.25rem; }

.faq-section {
  max-width: none;
  background: var(--card-muted);
  color: var(--ink);
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}
.faq-section > div {
  max-width: 920px;
  margin-top: 1rem;
}
details {
  margin: .75rem 0;
  padding: 1rem;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: #fff;
}
summary {
  cursor: pointer;
  font-weight: 850;
}
details p {
  margin: .75rem 0 0;
  color: var(--muted-dark);
}

.page-head {
  padding: 3rem clamp(1rem, 5vw, 5rem) 1.5rem;
}
.tool-shell,
.answer-layout,
.platform-grid {
  display: grid;
  gap: 1rem;
  padding-bottom: 4rem;
}
.tool-shell { grid-template-columns: minmax(0, 1fr) minmax(260px, .65fr); }
.answer-layout { grid-template-columns: minmax(0, 1fr) minmax(260px, .45fr); }
.platform-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.answer-list,
.answer-aside {
  display: grid;
  gap: 1rem;
  align-content: start;
}

label {
  display: grid;
  gap: .35rem;
  margin-bottom: 1rem;
  color: var(--muted);
}
input,
select {
  width: 100%;
  padding: .8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
output {
  display: block;
  margin-top: 1rem;
  color: var(--accent);
  font-weight: 850;
}
.platform-kicker,
.fit { color: var(--muted); }
li { margin: .35rem 0; }

.site-footer {
  padding: 2rem clamp(1rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--bg);
}

@media (max-width: 980px) {
  .hero,
  .tool-shell,
  .grid-section,
  .platform-grid,
  .answer-layout {
    grid-template-columns: 1fr;
  }
  .stats-section,
  .topic-grid,
  .latest-posts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }
  .brand small { display: none; }
  .hero {
    min-height: 620px;
    padding-top: 2rem;
  }
  .hero::before {
    background:
      linear-gradient(180deg, rgba(7, 11, 10, .86) 0%, rgba(7, 11, 10, .92) 100%);
  }
  .stats-section,
  .topic-grid,
  .latest-posts-grid {
    grid-template-columns: 1fr;
  }
  .stat-card {
    min-height: 140px;
  }
}