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

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

:root {
  --paper: #fdfbf7;
  --soft: #f5f5f5;
  --ink: #1a1a1a;
  --line: #e0e0e0;
  --mute: #5f5f5f;
  --r: 10px;
  --wrap: 1120px;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Manrope", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0.008em;
  -webkit-font-smoothing: antialiased;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.2;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }

img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--r);
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: "Syne", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

p { margin: 0 0 1.05em; }

h2 > span,
h3 > span {
  box-shadow: inset 0 -0.16em 0 var(--line);
}

/* 顶部 */
.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.ticker {
  margin: 0;
  padding: 7px 18px;
  font-family: "Syne", "PingFang SC", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-align: center;
  color: var(--mute);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brandrow {
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
}

.brandlink {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.brandmark {
  width: 32px;
  height: 32px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  padding: 2px;
}

.logomark {
  font-family: "Syne", "PingFang SC", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brandname {
  font-family: "Syne", "PingFang SC", sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.menurow { padding: 8px 18px 12px; }

.menu { margin: 0; }

.menuh {
  font-family: "Manrope", "PingFang SC", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--mute);
  margin: 0 0 8px;
}

.menulist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.menulist a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 13px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--paper);
}

.menulist a:hover,
.menulist a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* 首屏 */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 72px 18px;
  overflow: hidden;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.heronum {
  position: absolute;
  inset: 0;
  margin: 0;
  display: grid;
  place-items: center;
  z-index: 0;
  font-family: "Syne", sans-serif;
  font-weight: 700;
  font-size: clamp(170px, 50vw, 480px);
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: #f0ece2;
  user-select: none;
}

.herotitle {
  position: relative;
  z-index: 1;
  font-size: clamp(38px, 7.4vw, 88px);
  letter-spacing: -0.035em;
  max-width: 15em;
}

/* 主体 */
main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 18px;
}

.index-block {
  padding: 68px 0;
  border-bottom: 1px solid var(--line);
}

.toc {
  margin: 0;
  max-width: 560px;
  padding-left: 18px;
  border-left: 2px solid var(--ink);
}

.toch {
  font-family: "Manrope", "PingFang SC", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--mute);
  margin: 0 0 12px;
}

.toclist {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ix;
}

.toclist li {
  counter-increment: ix;
  border-bottom: 1px solid var(--line);
}

.toclist a {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 46px;
  padding: 6px 4px;
  font-size: 16px;
}

.toclist a::before {
  content: "0" counter(ix);
  font-family: "Syne", sans-serif;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.toclist a:hover { background: var(--soft); }

main > section[id] {
  scroll-margin-top: 190px;
  margin: 26px 0;
  padding: 32px 22px;
  background: #fffefb;
  border: 1px solid var(--line);
  border-radius: var(--r);
}

main > section[id] h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  margin: 0 0 0.6em;
}

main > section[id] h3 {
  font-size: clamp(19px, 2.4vw, 23px);
  margin: 1.5em 0 0.5em;
}

main > section[id] p,
main > section[id] li {
  max-width: 68ch;
}

main > section[id] ul,
main > section[id] ol {
  padding-left: 1.25em;
  margin: 0 0 1.1em;
}

main > section[id] li { margin: 0 0 0.4em; }

main > section[id] blockquote {
  margin: 1.4em 0;
  padding: 14px 18px;
  background: var(--soft);
  border-left: 2px solid var(--ink);
  border-radius: 0 var(--r) var(--r) 0;
}

main > section[id] blockquote p:last-child { margin-bottom: 0; }

main > section[id] figure {
  margin: 1.4em 0;
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
}

main > section[id] figcaption {
  font-size: 14px;
  color: var(--mute);
  padding-top: 8px;
}

main > section[id] aside {
  margin: 1.4em 0;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  border-radius: var(--r);
  background: var(--soft);
  font-size: 16px;
}

main > section[id] table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  margin: 1.2em 0;
}

main > section[id] th,
main > section[id] td {
  border: 1px solid var(--line);
  padding: 9px 11px;
  text-align: left;
}

main > section[id] th { background: var(--soft); }

main > section[id] code {
  font-size: 15px;
  background: var(--soft);
  padding: 1px 5px;
  border-radius: 5px;
}

main > section[id] a {
  border-bottom: 1px solid var(--ink);
}

main > section[id] a:hover { background: var(--ink); color: var(--paper); }

/* 结尾 */
.ctablock {
  margin: 0 auto;
  max-width: var(--wrap);
  padding: 70px 18px;
  text-align: center;
  border-top: 1px solid var(--ink);
}

.ctah {
  font-size: clamp(26px, 4.6vw, 46px);
  margin: 0 0 22px;
}

.ctabtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 30px;
  border: 1px solid var(--ink);
  border-radius: var(--r);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.ctabtn:hover { background: var(--ink); color: var(--paper); }

/* 页脚 */
.sitefoot {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px 30px;
  padding: 44px max(18px, calc((100% - 1120px) / 2)) 28px;
  background: var(--soft);
  border-top: 1px solid var(--line);
}

.fbrand {
  margin: 0;
  font-family: "Syne", "PingFang SC", sans-serif;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.fgroup {
  margin: 0;
  display: flex;
  flex-direction: column;
  font-size: 16px;
}

.fgroup a {
  display: flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 1px solid transparent;
}

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

.fcopy {
  grid-column: 1 / -1;
  justify-self: center;
  font-size: 14px;
  color: var(--mute);
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  width: 100%;
}
/* 揭示 */
.will-in { opacity: 0; }

.will-in.is-in { animation: rise 0.38s ease-out forwards; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .will-in { opacity: 1; }
  .will-in.is-in { animation: none; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero { padding: 52px 16px; }
  .heronum { font-size: clamp(150px, 46vw, 260px); }
  main { padding: 0 14px; }
  .index-block { padding: 48px 0; }
  main > div[id] {
    padding: 24px 15px;
    margin: 20px 0;
    scroll-margin-top: 210px;
  }
  .menulist a { font-size: 16px; padding: 4px 14px; }
  .sitefoot {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 34px 16px 24px;
  }
  .ctablock { padding: 52px 16px; }
}
</｜DSML｜ parameter>
</｜DSML｜ invoke>
</｜DSML｜ calls>

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