@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

:root {
  --mint: #b4fde1;
  --blue: #add8e6;
  --ink: #172620;
  --ink-soft: #28453a;
  --paper: #ffffff;
  --wash: #eafff7;
  --line: rgba(23, 38, 32, 0.9);
  --r-lg: 32px;
  --r-md: 28px;
  --r-sm: 16px;
  --clay: inset -3px -3px 9px rgba(23, 38, 32, 0.1), inset 3px 3px 9px rgba(255, 255, 255, 0.85), 7px 9px 0 rgba(23, 38, 32, 0.15);
  --clay-lift: inset -3px -3px 9px rgba(23, 38, 32, 0.1), inset 3px 3px 9px rgba(255, 255, 255, 0.85), 10px 13px 0 rgba(23, 38, 32, 0.19);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: 'Poppins', 'Open Sans', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: linear-gradient(180deg, #eafff7 0%, #e2f6ff 46%, #f0fff9 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; }

a { color: inherit; }

:focus-visible {
  outline: 3px solid #1c5c46;
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: 14px;
  top: -60px;
  z-index: 110;
  padding: 10px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: var(--r-sm);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip:focus { top: 12px; }

.nav-toggle {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 2px;
  opacity: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(234, 255, 247, 0.97) 0%, rgba(230, 249, 255, 0.9) 100%);
  border-bottom: 4px solid var(--line);
}

.bar {
  max-width: 1160px;
  margin: 0 auto;
  padding: 10px 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.brand {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 4px 2px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: clamp(1.12rem, 3.6vw, 1.4rem);
  letter-spacing: 0.02em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 3px solid var(--ink);
  border-radius: 13px;
  background: linear-gradient(150deg, var(--mint), var(--blue));
  box-shadow: inset -2px -2px 6px rgba(255, 255, 255, 0.9), 3px 3px 0 rgba(23, 38, 32, 0.22);
  font-size: 1rem;
}

.actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  border: 3px solid var(--ink);
  border-radius: 999px;
  background: linear-gradient(160deg, var(--mint) 0%, #8fe9d0 100%);
  color: var(--ink);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  box-shadow: inset -2px -2px 8px rgba(255, 255, 255, 0.8), 4px 5px 0 rgba(23, 38, 32, 0.2);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
}
.cta:hover { transform: translateY(-2px); }
.cta:active {
  transform: translateY(2px);
  box-shadow: inset 2px 2px 8px rgba(23, 38, 32, 0.2), 2px 2px 0 rgba(23, 38, 32, 0.22);
}

.burger {
  width: 48px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 15px;
  background: var(--paper);
  cursor: pointer;
  box-shadow: inset -2px -2px 7px rgba(23, 38, 32, 0.1), 3px 4px 0 rgba(23, 38, 32, 0.2);
  transition: transform 0.18s ease;
}
.burger:active { transform: translateY(2px); }
.bars { display: grid; gap: 4px; }
.bars i {
  display: block;
  width: 21px;
  height: 3px;
  border-radius: 2px;
  background: var(--ink);
}

.menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 70px 20px 30px;
  overflow-y: auto;
  background: radial-gradient(circle at 24% 16%, #dcfff2 0%, var(--mint) 40%, var(--blue) 100%);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}
.nav-toggle:checked ~ .menu {
  opacity: 1;
  visibility: visible;
}

.menu-close {
  position: fixed;
  top: 16px;
  right: 18px;
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 700;
  border: 3px solid var(--ink);
  border-radius: 999px;
  background: var(--paper);
  cursor: pointer;
  box-shadow: inset -2px -2px 7px rgba(23, 38, 32, 0.1), 3px 4px 0 rgba(23, 38, 32, 0.2);
}

.menu-nav { width: min(560px, 100%); }
.menu-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.menu-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 12px 20px;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 20px;
  box-shadow: inset -2px -2px 8px rgba(23, 38, 32, 0.08), 5px 6px 0 rgba(23, 38, 32, 0.16);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
}
.menu-nav a:hover {
  transform: translateY(-3px);
  box-shadow: inset -2px -2px 8px rgba(23, 38, 32, 0.08), 8px 10px 0 rgba(23, 38, 32, 0.2);
}

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 22px 20px 0;
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr);
  grid-template-areas: 'rail main';
  gap: 24px;
  align-items: start;
}

main { grid-area: main; min-width: 0; }

.rail {
  grid-area: rail;
  position: sticky;
  top: 138px;
  padding: 18px 16px 20px;
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 24px;
  box-shadow: inset -3px -3px 9px rgba(23, 38, 32, 0.07), 6px 8px 0 rgba(23, 38, 32, 0.13);
}

.rail-title {
  margin: 0 0 12px;
  font-size: 1.08rem;
  line-height: 1.4;
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.rail-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 12px;
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  background: linear-gradient(160deg, #f4fffb, #e9f8ff);
  border: 2px solid rgba(23, 38, 32, 0.5);
  border-radius: 14px;
  transition: transform 0.18s ease, background 0.18s ease;
}
.rail-list a:hover {
  transform: translateX(3px);
  background: linear-gradient(160deg, var(--mint), #d8effa);
}

.doc { min-width: 0; }

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin: 0 0 26px;
  padding: clamp(24px, 6vw, 58px);
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  border: 4px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, #ddfff1 0%, #d2ecfb 58%, #effff9 100%);
  box-shadow: inset -4px -4px 14px rgba(23, 38, 32, 0.1), inset 4px 4px 14px #ffffff, 11px 13px 0 rgba(23, 38, 32, 0.18);
}

.hero::before {
  content: '';
  position: absolute;
  inset: -14% -8%;
  z-index: -1;
  background-image: radial-gradient(circle at 1px 1px, rgba(23, 38, 32, 0.18) 1.7px, transparent 0);
  background-size: 20px 20px;
  transform: translate3d(0, var(--py, 0px), 0);
  opacity: 0.9;
}

.hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(1.85rem, 5.2vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.lead {
  margin: 0;
  max-width: 52ch;
  font-size: 1.03rem;
  color: var(--ink-soft);
}

.eyebrow {
  display: inline-block;
  align-self: flex-start;
  margin: 0 0 2px;
  padding: 4px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: 999px;
  box-shadow: 3px 3px 0 rgba(23, 38, 32, 0.18);
}

.hero-figure {
  margin: 8px 0 0;
  overflow: hidden;
  border: 3px solid var(--line);
  border-radius: 26px;
  box-shadow: 0 12px 26px rgba(23, 38, 32, 0.2);
  background: var(--paper);
}
.hero-img { display: block; width: 100%; height: auto; }

.doc > section {
  position: relative;
  overflow: hidden;
  margin: 0 0 26px;
  padding: 26px 22px 32px;
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--clay);
  scroll-margin-top: 140px;
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.22s ease;
}
.doc > section:hover {
  transform: translateY(-3px);
  box-shadow: var(--clay-lift);
}
.doc > section::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 9px;
  background: linear-gradient(90deg, var(--mint), var(--blue));
}

.doc section small {
  display: block;
  margin: 0 0 4px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #4a7a66;
}

.doc section h2 {
  margin: 0 0 0.6em;
  max-width: 26ch;
  font-size: clamp(1.32rem, 2.7vw, 1.72rem);
  line-height: 1.32;
}

.doc section h3 {
  margin: 1.2em 0 0.45em;
  font-size: 1.13rem;
  line-height: 1.45;
}

.doc section p { margin: 0 0 1em; color: var(--ink-soft); }
.doc section p:last-child { margin-bottom: 0; }

.doc section ul,
.doc section ol { margin: 0 0 1.1em; padding-left: 1.3em; }
.doc section li { margin: 0.45em 0; }

.doc section a {
  color: #17553f;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.doc section blockquote {
  margin: 0 0 1em;
  padding: 14px 16px;
  background: linear-gradient(150deg, #eafff7, #eaf6ff);
  border: 3px solid rgba(23, 38, 32, 0.35);
  border-radius: 18px;
}

.foot {
  margin-top: 40px;
  padding: 0 20px 34px;
}

.foot-cta {
  max-width: 1160px;
  margin: 0 auto 22px;
  padding: clamp(24px, 5vw, 46px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  border: 4px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(145deg, #d9fff0, var(--blue));
  box-shadow: inset -4px -4px 12px rgba(255, 255, 255, 0.7), inset 4px 4px 12px rgba(23, 38, 32, 0.08), 10px 12px 0 rgba(23, 38, 32, 0.17);
}
.foot-cta h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.25;
}
.cta-big { font-size: 1.05rem; padding: 12px 28px; }

.foot-bar {
  max-width: 1160px;
  margin: 0 auto;
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  border-top: 3px solid rgba(23, 38, 32, 0.28);
  font-size: 0.95rem;
}
.foot-bar p { margin: 0; font-weight: 600; }
.foot-bar a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 4px;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 900px) {
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: 'main' 'rail';
    padding-top: 16px;
    gap: 20px;
  }
  .rail { position: static; top: auto; }
  .doc > section { scroll-margin-top: 150px; }
  .hero { min-height: 62vh; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .bars i { width: 18px; }
  .doc > section { padding: 22px 16px 28px; border-radius: 24px; }
  .hero { border-radius: 26px; }
  .cta { padding: 10px 16px; font-size: 0.95rem; }
  .foot { padding: 0 16px 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .hero::before { transform: none; }
  .doc > section:hover { transform: none; }
}
</｜DSML｜ parameter>
</｜DSML｜ invoke>
</｜DSML｜ calls>

button[aria-expanded]{min-width:44px;min-height:44px}