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

:root {
  --ink: #000000;
  --paper: #ffffff;
  --line: #d8d8d8;
  --mute: #5b5b5b;
  --railw: 264px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  overflow-x: hidden;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  z-index: 90;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  border-radius: 4px;
  text-decoration: none;
}

.skip:focus {
  left: 0.5rem;
}

/* ---------- 左侧竖排导航 ---------- */

.rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--railw);
  z-index: 40;
  background: var(--paper);
  border-right: 1px solid var(--ink);
  padding: 2.4rem 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.9rem;
  overflow-y: auto;
}

.rail-mark {
  display: block;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.rail-mark::after {
  content: '';
  display: block;
  width: 2.4rem;
  height: 3px;
  background: var(--ink);
  margin-top: 0.7rem;
}

.rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.rail .pill {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 0.5rem 1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.3;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.rail .pill:hover,
.rail .pill:focus-visible {
  background: var(--ink);
  color: var(--paper);
  transform: translateX(4px);
}

.rail .pill[aria-current] {
  background: var(--ink);
  color: var(--paper);
}

.pagewrap {
  margin-left: var(--railw);
  min-width: 0;
}

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  isolation: isolate;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(3rem, 11vh, 8rem) clamp(1.2rem, 6vw, 5rem) 0;
  text-align: right;
  overflow: hidden;
  border-bottom: 1px solid var(--ink);
}

.hero-band {
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: 0;
  height: 46%;
  margin: 0;
  background: var(--ink);
  transform: skewY(-3.5deg);
  transform-origin: left bottom;
  z-index: 0;
  will-change: transform;
}

.hero h1 {
  position: relative;
  z-index: 2;
  margin: 0 0 1.1rem;
  font-size: clamp(2.5rem, 8.2vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: #ffffff;
  mix-blend-mode: difference;
  text-wrap: balance;
  animation: rise 0.8s 0.05s both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.hero-lead {
  position: relative;
  z-index: 2;
  margin: 0 0 6vh auto;
  max-width: 44ch;
  color: var(--paper);
  font-weight: 300;
  font-size: clamp(0.94rem, 1.4vw, 1.08rem);
  line-height: 1.7;
  animation: rise 0.8s 0.22s both cubic-bezier(0.2, 0.7, 0.2, 1);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 内容区：左栏 + 正文 ---------- */

.stage {
  display: grid;
  grid-template-columns: minmax(0, 208px) minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 3.4rem);
  padding: clamp(2.2rem, 5vw, 3.6rem) clamp(1.2rem, 8vw, 7rem) 0
    clamp(1.2rem, 6vw, 5rem);
  max-width: 1240px;
}

.side {
  position: sticky;
  top: 2rem;
  align-self: start;
  border-top: 3px solid var(--ink);
  padding-top: 0.8rem;
  min-width: 0;
}

.eyebrow {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  font-weight: 500;
  color: var(--mute);
  margin-bottom: 0.45rem;
}

.side-h {
  font-size: 1rem;
  line-height: 1.3;
  margin: 0;
  letter-spacing: 0.02em;
}

.side-list {
  list-style: none;
  counter-reset: s;
  margin: 0.9rem 0 0;
  padding: 0;
}

.side-list li {
  counter-increment: s;
  border-bottom: 1px solid var(--line);
}

.side-list a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 40px;
  padding: 0.3rem 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.side-list a::before {
  content: counter(s, decimal-leading-zero);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.side-list a:hover {
  color: var(--mute);
  padding-left: 0.25rem;
}

/* ---------- 正文 ---------- */

.prose {
  min-width: 0;
}

.prose > article {
  padding: clamp(1.9rem, 4vw, 3rem) 0;
  border-top: 1px solid var(--ink);
}

.prose > article:first-child {
  border-top: 0;
  padding-top: 0;
}

.prose h2 {
  font-size: clamp(1.5rem, 3.3vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  text-wrap: balance;
}

.prose h3 {
  font-size: 1.1rem;
  line-height: 1.4;
  margin: 1.8rem 0 0.5rem;
  letter-spacing: -0.01em;
}

.prose p {
  margin: 0 0 1.1rem;
}

.prose a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2rem;
  padding-left: 1.25rem;
}

.prose li {
  margin: 0.28rem 0;
}

.prose blockquote {
  margin: 1.6rem 0;
  padding: 0.1rem 0 0.1rem 1.15rem;
  border-left: 4px solid var(--ink);
  font-size: 1.08rem;
  line-height: 1.7;
}

.prose figure {
  margin: 1.6rem 0;
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.prose figcaption {
  font-size: 0.8rem;
  color: var(--mute);
  margin-top: 0.5rem;
}

.prose small {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--mute);
  margin-bottom: 0.4rem;
}

.prose > article > p:first-of-type::first-letter {
  float: left;
  font-size: 3em;
  line-height: 0.8;
  font-weight: 700;
  padding: 0.06em 0.13em 0 0;
}

/* ---------- 子页卡片 ---------- */

.cards {
  padding: clamp(2rem, 5vw, 3rem) clamp(1.2rem, 8vw, 7rem) 0
    clamp(1.2rem, 6vw, 5rem);
  max-width: 1240px;
}

.cards-h {
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  margin: 0 0 1.1rem;
  letter-spacing: -0.02em;
}

.cards ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}

.card {
  display: block;
  height: 100%;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 10px 22px -16px rgba(0, 0, 0, 0.6);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 18px 30px -18px rgba(0, 0, 0, 0.65);
}

.card-t {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
}

.card-d {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--mute);
}

/* ---------- 页脚 ---------- */

.foot {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
  background: var(--ink);
  color: var(--paper);
  padding: clamp(1.6rem, 4vw, 2.6rem) clamp(1.2rem, 6vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem 1.8rem;
}

.foot-mark {
  color: var(--paper);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.4vw, 3rem);
}

.foot-nav ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.9rem;
  margin: 0;
  padding: 0;
}

.foot-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--paper);
  text-decoration: none;
  font-size: 0.8rem;
  opacity: 0.82;
  transition: opacity 0.2s ease;
}

.foot-nav a:hover,
.foot-nav a:focus-visible {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.foot-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.76rem;
}

.foot-meta p {
  margin: 0;
  opacity: 0.68;
}

.foot-meta a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.foot-meta a:hover {
  border-bottom-color: var(--paper);
}

/* ---------- 滚动出现 ---------- */

html.js .prose > article,
html.js .side,
html.js .cards {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

html.js .prose > article.is-in,
html.js .side.is-in,
html.js .cards.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 宽屏正文分栏 ---------- */

@media (min-width: 62rem) {
  .prose > article {
    column-count: 2;
    column-gap: 2.6rem;
  }
  .prose > article > h2,
  .prose > article > h3,
  .prose > article > figure,
  .prose > article > blockquote,
  .prose > article > table {
    column-span: all;
  }
  .prose > article > ul,
  .prose > article > ol {
    break-inside: avoid;
  }
}

/* ---------- 平板 / 手机 ---------- */

@media (max-width: 860px) {
  body {
    font-size: 16px;
  }

  .rail {
    position: sticky;
    inset: auto;
    top: 0;
    width: auto;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
    padding: 0.7rem 1rem 0.6rem;
    gap: 0.55rem;
    overflow: visible;
  }

  .rail-mark {
    font-size: 0.94rem;
  }

  .rail-mark::after {
    width: 1.6rem;
    height: 2px;
    margin-top: 0.4rem;
  }

  .rail ol {
    flex-direction: row;
    gap: 0.4rem;
    overflow-x: auto;
    padding-bottom: 0.15rem;
    scrollbar-width: none;
  }

  .rail ol::-webkit-scrollbar {
    display: none;
  }

  .rail .pill {
    min-height: 40px;
    padding: 0.35rem 0.85rem;
    font-size: 0.86rem;
    white-space: nowrap;
  }

  .rail .pill:hover {
    transform: none;
  }

  .pagewrap {
    margin-left: 0;
  }

  .hero {
    min-height: 62vh;
    padding-top: clamp(1.6rem, 6vh, 3rem);
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .hero-band {
    height: 54%;
    transform: skewY(-2.5deg);
  }

  .hero-lead {
    margin-bottom: 3.2rem;
    font-size: 0.95rem;
  }

  main article[id] {
    scroll-margin-top: 8.5rem;
  }

  .stage {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.1rem;
    padding: 1.6rem 1.1rem 0;
    max-width: none;
  }

  .side {
    position: static;
  }

  .side-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0.55rem 0 0.2rem;
  }

  .side-list li {
    border-bottom: 0;
  }

  .side-list a {
    min-height: 40px;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-size: 0.84rem;
  }

  .side-list a:hover {
    padding-left: 0.8rem;
    border-color: var(--ink);
  }

  .prose > article {
    padding: 1.6rem 0;
  }

  .cards {
    padding: 1.6rem 1.1rem 0;
    max-width: none;
  }

  .foot {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 1.1rem 1.8rem;
  }

  .foot-meta {
    margin-left: 0;
    flex-wrap: wrap;
    gap: 0.4rem 1rem;
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
    html.js .prose > article,
    html.js .side,
    html.js .cards {
      opacity: 1;
      transform: none;
      transition: none;
    }
    .hero h1,
    .hero-lead {
      animation: none;
    }
  }
}
</｜DSML｜ parameter>
</invoke>
</parameter>
</response>

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