:root {
  --ink: #17211d;
  --muted: #62706a;
  --line: #d9ded9;
  --paper: #fbfaf6;
  --white: #ffffff;
  --green: #17664d;
  --gold: #b98b2f;
  --coral: #c85f45;
  --blue: #416a87;
  --mint: #e6f2ed;
  --sun: #f6ead0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.72;
}
a { color: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(251, 250, 246, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
}
.logo-lockup img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  background: var(--white);
  border: 1px solid var(--line);
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 7px 10px;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  white-space: nowrap;
}
nav a.active,
nav a:hover {
  color: var(--green);
  border-bottom-color: var(--gold);
}
.hero {
  min-height: 76vh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
  padding: clamp(48px, 8vw, 94px) clamp(18px, 5vw, 72px) clamp(34px, 6vw, 70px);
  background:
    linear-gradient(110deg, rgba(23, 102, 77, 0.12), rgba(185, 139, 47, 0.12) 48%, rgba(200, 95, 69, 0.08)),
    var(--paper);
}
.eyebrow,
.tag {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  margin: 0 0 12px;
}
h1 {
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.06;
  margin: 0 0 22px;
  letter-spacing: 0;
}
.lead {
  font-size: clamp(18px, 2vw, 23px);
  color: #32413b;
  max-width: 900px;
  margin: 0;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  text-decoration: none;
  border: 1px solid var(--green);
  font-weight: 800;
}
.primary-action { background: var(--green); color: var(--white); }
.secondary-action { color: var(--green); background: transparent; }
.hero-visual {
  background: var(--white);
  border: 1px solid var(--line);
  padding: clamp(20px, 4vw, 36px);
  display: grid;
  gap: 20px;
  box-shadow: 0 22px 60px rgba(24, 32, 31, 0.08);
}
.brand-mark {
  width: min(280px, 72%);
  max-height: 160px;
  object-fit: contain;
}
.answer-proof {
  display: grid;
  gap: 8px;
  padding: 18px;
  background: #f7f5ee;
  border-left: 4px solid var(--gold);
}
.answer-proof p { margin: 0; }
.content-section,
.evidence-band,
.next-band {
  padding: clamp(34px, 6vw, 74px) clamp(18px, 5vw, 72px);
}
.content-section:nth-of-type(even) { background: var(--white); }
.section-inner { max-width: 1160px; margin: 0 auto; }
h2 {
  font-size: clamp(25px, 3vw, 40px);
  line-height: 1.16;
  margin: 0 0 18px;
  letter-spacing: 0;
}
p { color: #34413d; margin: 0 0 14px; }
.check-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.check-list li {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  padding: 14px 16px;
  min-height: 58px;
}
.content-section:nth-of-type(even) .check-list li { background: #fbfaf6; }
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 24px;
}
.link-tile {
  display: grid;
  gap: 6px;
  padding: 18px;
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
}
.link-tile span { font-weight: 800; font-size: 18px; }
.link-tile small { color: var(--muted); }
.answer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.answer-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 20px;
}
.answer-card h2 { font-size: 24px; }
.answer-card a { color: var(--green); font-weight: 800; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 16px 18px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--green);
}
.faq-item p { margin: 10px 0 0; }
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--white);
}
table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}
th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--green);
  color: var(--white);
  font-weight: 800;
}
td { color: #34413d; }
.evidence-band { background: var(--mint); }
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.evidence-grid figure {
  margin: 0;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 10px;
}
.evidence-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid #ece8dc;
}
.evidence-grid figcaption {
  padding-top: 8px;
  color: var(--muted);
  font-size: 14px;
}
.next-band { background: var(--sun); }
code {
  background: rgba(255,255,255,0.7);
  padding: 2px 6px;
  border: 1px solid rgba(24,32,31,0.12);
}
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.quick-links a {
  text-decoration: none;
  border: 1px solid var(--gold);
  color: #6f4e0c;
  background: rgba(255,255,255,0.72);
  padding: 8px 12px;
  font-weight: 800;
}
.site-footer {
  padding: 28px clamp(18px, 5vw, 72px);
  background: #17211d;
  color: rgba(255,255,255,0.82);
}
.site-footer p {
  max-width: 1160px;
  margin: 0 auto 8px;
  color: rgba(255,255,255,0.82);
}
.site-footer a { color: #f4d78c; }
@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }
  nav { justify-content: flex-start; }
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  h1 { font-size: clamp(34px, 12vw, 52px); }
}