:root {
  color-scheme: light;
  --bg: #f3f6f2;
  --panel: #ffffff;
  --ink: #193029;
  --muted: #617069;
  --line: #d9e2dc;
  --accent: #176c56;
  --accent-strong: #0e5140;
  --soft: #e8f2ec;
  --warm: #f5ead8;
  --shadow: 0 18px 45px rgba(32, 62, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(198, 225, 205, 0.52), transparent 30rem),
    linear-gradient(180deg, #fbfcf8 0, var(--bg) 34rem);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-strong);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 20;
  transform: translateY(-150%);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  padding: 8px 12px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.page-shell,
.site-footer {
  width: min(1060px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 14px;
}

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

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

.hero {
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(23, 108, 86, 0.14);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 242, 236, 0.94)),
    var(--panel);
  box-shadow: var(--shadow);
  padding: clamp(34px, 7vw, 76px);
}

.hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 300px;
  height: 300px;
  border-radius: 44% 56% 58% 42%;
  background: rgba(200, 218, 183, 0.35);
  transform: rotate(16deg);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.3;
}

h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(32px, 6vw, 58px);
  letter-spacing: -0.035em;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 19px);
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-strong);
  color: #fff;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.button.secondary:hover {
  background: var(--soft);
}

.section {
  padding: 54px 0 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 22px;
}

.section-heading h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 4vw, 36px);
}

.section-heading p,
.muted {
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.guide-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 32px rgba(32, 62, 51, 0.05);
  padding: 26px;
}

.guide-card:nth-child(2n) {
  background: linear-gradient(145deg, #fff, #fbf5e9);
}

.guide-card h3 {
  margin: 0 0 10px;
  font-size: 23px;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
}

.guide-card a {
  margin-top: 22px;
  font-weight: 800;
}

.article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 42px;
  padding-top: 20px;
}

.article-main {
  min-width: 0;
}

.article-main h2 {
  margin: 44px 0 12px;
  font-size: 28px;
}

.article-main h3 {
  margin: 28px 0 8px;
  font-size: 20px;
}

.article-main p,
.article-main li {
  font-size: 16px;
}

.article-main li + li {
  margin-top: 8px;
}

.article-aside {
  align-self: start;
  position: sticky;
  top: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  padding: 20px;
}

.article-aside strong {
  display: block;
  margin-bottom: 8px;
}

.article-aside a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
}

.note,
.checklist,
.cta-panel {
  border-radius: 18px;
  padding: 22px;
}

.note {
  border: 1px solid #eadbc2;
  background: var(--warm);
}

.checklist {
  border: 1px solid var(--line);
  background: var(--panel);
}

.checklist li::marker {
  color: var(--accent);
}

.cta-panel {
  margin-top: 42px;
  border: 1px solid rgba(23, 108, 86, 0.18);
  background: var(--soft);
}

.cta-panel h2 {
  margin-top: 0;
}

.related {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.related a {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 14px 16px;
  font-weight: 700;
  text-decoration: none;
}

.breadcrumbs {
  margin: 4px 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: inherit;
}

.byline {
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  padding: 28px 0 48px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 820px) {
  .article {
    display: block;
  }

  .article-aside {
    position: static;
    margin: 28px 0;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    display: grid;
    gap: 4px;
    text-align: right;
  }

  .hero {
    border-radius: 20px;
    padding: 30px 22px 34px;
  }

  .card-grid,
  .related {
    grid-template-columns: 1fr;
  }

  .guide-card {
    min-height: 0;
  }
}