@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Crimson+Pro:wght@400;500;600;700&display=swap');

:root {
  --mint: #b4fde1;
  --blue: #add8e6;
  --ink: #172620;
  --mint-soft: #e8fff6;
  --blue-soft: #e9f5fb;
  --cream: #fbfefc;
  --r: 20px;
  --clay: inset -3px -3px 10px rgba(23, 38, 32, .13), 6px 8px 18px rgba(23, 38, 32, .18);
  --clay-sm: inset -2px -2px 6px rgba(23, 38, 32, .12), 3px 4px 10px rgba(23, 38, 32, .16);
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  padding-bottom: 120px;
  font-family: "Atkinson Hyperlegible", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: linear-gradient(180deg, var(--mint) 0%, #eafaf3 32%, #f4fbf8 100%);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "Crimson Pro", Georgia, "Songti SC", "SimSun", serif;
  line-height: 1.22;
  margin: 0 0 .4em;
  letter-spacing: .01em;
}

a { color: var(--ink); }

p { margin: 0 0 1em; }

.subtitle {
  font-size: 16px;
  opacity: .74;
  margin: 0 0 .9em;
}

/* 角落品牌图标 */
.mark {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 41;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--blue);
  box-shadow: var(--clay-sm);
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s ease-out;
}

.mark:active { transform: scale(.93); }

/* 满屏首屏 */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: linear-gradient(155deg, var(--mint) 0%, var(--blue) 72%);
}

.heroImg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.veil {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(23, 38, 32, 0) 34%, rgba(23, 38, 32, .28) 100%);
}

.hero.hasImg .veil {
  background: linear-gradient(180deg, rgba(23, 38, 32, .18) 0%, rgba(23, 38, 32, .06) 38%, rgba(23, 38, 32, .78) 100%);
}

.heroTxt {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 780px;
  padding: 0 24px 78px;
  text-align: left;
}

.heroTxt h1 {
  font-size: clamp(30px, 7.4vw, 66px);
  margin: 0 0 .28em;
  text-wrap: balance;
}

.heroTxt .lead {
  font-size: clamp(16px, 1.9vw, 19px);
  max-width: 32em;
  margin: 0;
  opacity: .95;
}

.hero.hasImg .heroTxt { color: #f5fffb; }

/* 主体网格 */
main { display: block; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 20px 0;
}

.shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

/* 左侧目录 */
.side {
  position: sticky;
  top: 16px;
  padding: 16px 14px;
  background: var(--mint-soft);
  border: 3px solid var(--ink);
  border-radius: var(--r);
  box-shadow: var(--clay);
}

.side h2 { font-size: 20px; margin: 0 0 .1em; }
.side .subtitle { margin: 0 0 12px; }

.side ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.side a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  font-size: 16px;
  text-decoration: none;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: var(--clay-sm);
  transition: background .18s ease-out, transform .18s ease-out;
}

.side a:hover { background: var(--blue); }
.side a:active { transform: translateY(2px); }

/* 正文 */
.paper { min-width: 0; overflow-wrap: break-word; }

.paper > div {
  background: var(--mint-soft);
  padding: 26px 24px;
  margin: 0 0 16px;
}

.paper > div:nth-of-type(even) { background: var(--blue-soft); }
.paper > div:first-child { padding-top: 30px; }

.paper [id] { scroll-margin-top: 84px; }

.paper div h2 {
  font-size: clamp(22px, 3vw, 30px);
  margin: 0 0 .3em;
}

.paper div h2 + .subtitle { margin-top: -.1em; }

.paper p { max-width: 66ch; }

.paper h3 { font-size: clamp(19px, 2.2vw, 22px); }

.paper ul,
.paper ol { padding-left: 1.25em; margin: 0 0 1em; }
.paper li { margin-bottom: .4em; }

.paper a {
  color: #0e6a51;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.paper blockquote {
  margin: 0 0 1em;
  padding: 12px 16px;
  background: #ffffff;
  border-left: 5px solid var(--ink);
  border-radius: 12px;
}

.paper img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 0 1em;
  border-radius: 14px;
}

.paper table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1em;
  font-size: 16px;
}

.paper th,
.paper td {
  border: 2px solid rgba(23, 38, 32, .28);
  padding: 8px 10px;
  text-align: left;
}

/* 页脚 */
.foot {
  margin-top: 44px;
  padding: 28px 20px 30px;
  border-top: 4px solid var(--ink);
  background: linear-gradient(180deg, #eafaf3, #d8f2e6);
}

.foot > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.cta {
  padding: 22px 22px 24px;
  background: var(--mint);
  border: 3px solid var(--ink);
  border-radius: 24px;
  box-shadow: var(--clay);
}

.cta h2 { font-size: clamp(22px, 3.4vw, 32px); margin: 0 0 .15em; }
.cta .subtitle { margin: 0 0 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 26px;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  background: var(--blue);
  border: 3px solid var(--ink);
  border-radius: 999px;
  box-shadow: var(--clay-sm);
  transition: transform .2s ease-out, box-shadow .2s ease-out;
}

.btn:active {
  transform: translateY(3px);
  box-shadow: inset 2px 2px 7px rgba(23, 38, 32, .22);
}

.cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 3px dashed rgba(23, 38, 32, .26);
}

.cols dl { margin: 0; }
.cols dt { font-weight: 700; letter-spacing: .06em; margin-bottom: 8px; }
.cols dd { margin: 0 0 2px; }

.cols dd a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 2px 0;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .18s ease-out;
}

.cols dd a:hover { border-bottom-color: var(--ink); }

.base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 2px solid rgba(23, 38, 32, .2);
  font-size: 16px;
}

.base p { margin: 0; }
.bl { display: flex; gap: 18px; }
.bl a { text-decoration: none; min-height: 40px; display: inline-flex; align-items: center; }
.bl a:hover { text-decoration: underline; }

/* 底部固定菜单 */
.nav {
  position: fixed;
  left: 50%;
  bottom: 14px;
  z-index: 40;
  transform: translateX(-50%);
  background: var(--mint);
  border: 3px solid var(--ink);
  border-radius: 999px;
  box-shadow: var(--clay);
}

.nav summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 10px 24px;
  font-size: 17px;
  font-weight: 700;
  user-select: none;
}

.nav summary::-webkit-details-marker { display: none; }

.nav summary::before {
  content: "";
  width: 17px;
  height: 3px;
  border-radius: 2px;
  background: var(--ink);
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
}

.nav menu {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 12px);
  transform: translateX(-50%);
  width: min(92vw, 520px);
  margin: 0;
  padding: 12px;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--cream);
  border: 3px solid var(--ink);
  border-radius: 22px;
  box-shadow: var(--clay);
}

.nav:not([open]) menu { display: none; }

.nav menu li { list-style: none; margin: 0; }

.nav menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  font-size: 16px;
  text-decoration: none;
  border-radius: 12px;
  background: var(--blue-soft);
  transition: background .18s ease-out;
}

.nav menu a:hover { background: var(--blue); }

/* 滚动显现 */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease-out, transform .55s cubic-bezier(.34, 1.56, .64, 1);
}

.rv.on { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .mark, .btn, .side a, .nav menu a { transition: none; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; gap: 18px; }
  .side { position: static; }
  .side ul { flex-direction: row; flex-wrap: wrap; }
  .side a { min-height: 42px; padding: 6px 11px; }
  .cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 16px; padding-bottom: 108px; }
  .wrap { padding: 24px 14px 0; }
  .heroTxt { padding: 0 18px 66px; }
  .paper > div { padding: 20px 16px; }
  .cols { grid-template-columns: 1fr; gap: 14px; }
  .base { flex-direction: column; }
  .foot { padding: 24px 14px 26px; }
  .nav summary { padding: 10px 20px; }
}
</｜DSML｜ parameter>
</｜DSML｜ invoke>
</｜DSML｜ calls>

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