:root {
  color-scheme: light;
  --ink: #17201b;
  --muted: #60706a;
  --line: #dbe4df;
  --paper: #fbfdfb;
  --soft: #eef6f2;
  --forest: #1f6b4f;
  --blue: #1e5f8c;
  --sun: #f5b641;
  --white: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 5vw, 64px);
  background: rgba(251, 253, 251, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--forest);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.95rem;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
}

.hero {
  min-height: 72vh;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(48px, 8vw, 96px) clamp(18px, 5vw, 64px);
  background:
    linear-gradient(110deg, rgba(251, 253, 251, 0.94) 0%, rgba(251, 253, 251, 0.78) 45%, rgba(251, 253, 251, 0.58) 100%),
    url("/assets/images/route-hero.svg") center / cover no-repeat;
  border-bottom: 1px solid var(--line);
}

.hero h1,
.article-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.35rem, 6vw, 5.2rem);
  line-height: 1.05;
}

.hero p,
.article-hero p {
  max-width: 680px;
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.search-box {
  display: flex;
  max-width: 620px;
  margin-top: 28px;
  border: 1px solid var(--line);
  background: var(--white);
}

.search-box input {
  flex: 1;
  min-width: 0;
  padding: 16px;
  border: 0;
  font-size: 1rem;
}

.search-box button,
.cta,
.affiliate-card a {
  border: 0;
  background: var(--forest);
  color: var(--white);
  padding: 0 22px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.hero-panel {
  display: grid;
  gap: 14px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(28, 48, 39, 0.12);
}

.hero-panel span {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.section {
  padding: clamp(44px, 7vw, 88px) clamp(18px, 5vw, 64px);
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section h2,
.article-body h2 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.2;
}

.route-grid,
.monetize-grid,
.affiliate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.route-card,
.monetize-grid article,
.affiliate-card,
.notice-box {
  background: var(--white);
  border: 1px solid var(--line);
}

.route-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.route-card div,
.monetize-grid article,
.affiliate-card,
.notice-box {
  padding: 22px;
}

.tag {
  display: inline-block;
  margin: 0;
  color: var(--blue);
  font-size: 0.84rem;
  font-weight: 800;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 32px;
  background: var(--soft);
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.check-list li {
  padding: 18px 20px;
  background: var(--white);
  border-left: 5px solid var(--sun);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 5vw, 64px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.article-hero {
  padding: clamp(42px, 7vw, 84px) clamp(18px, 5vw, 64px);
  background: var(--soft);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
  padding: 40px clamp(18px, 5vw, 64px) 84px;
}

.article-body {
  max-width: 820px;
}

.toc,
.side-box {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
}

.toc {
  position: sticky;
  top: 82px;
}

.toc a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  text-decoration: none;
}

.fact-table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
}

.fact-table th,
.fact-table td {
  padding: 14px;
  text-align: left;
  border: 1px solid var(--line);
  vertical-align: top;
}

.fact-table th {
  width: 160px;
  background: var(--soft);
}

.ad-slot {
  margin: 32px 0;
  padding: 24px;
  color: var(--muted);
  text-align: center;
  border: 1px dashed #9db0a8;
  background: #f7faf8;
}

.affiliate-card a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  margin-top: 10px;
  padding: 0 16px;
}

.faq details {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.faq summary {
  font-weight: 800;
  cursor: pointer;
}

.policy {
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 18px 84px;
}

@media (max-width: 860px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .route-grid,
  .monetize-grid,
  .affiliate-grid {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .search-box {
    flex-direction: column;
  }

  .search-box button {
    min-height: 48px;
  }
}