:root {
  --night: #f7f4ee;
  --night-soft: #ffffff;
  --ice: #1d1b19;
  --ice-bright: #0d0c0b;
  --glacier: #b28738;
  --muted: #59534b;
  --line: rgba(40, 38, 35, 0.19);
  --ambient-one: rgba(203, 169, 111, 0.16);
  --ambient-two: rgba(239, 176, 123, 0.1);
  --grid-line: rgba(40, 38, 35, 0.025);
  --record-bg: rgba(178, 135, 56, 0.07);
  --faint-line: rgba(40, 38, 35, 0.13);
  --control-bg: #ffffff;
  --control-border: #282623;
  --control-text: #282623;
  --control-active-bg: #282623;
  --control-active-text: #ffffff;
  --control-shadow: #282623;
  --serif-zh: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --serif-en: "Iowan Old Style", "Baskerville", "Palatino Linotype", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

:root[data-theme="dark"] {
  --night: #11100e;
  --night-soft: #181612;
  --ice: #f0e7dd;
  --ice-bright: #fffaf4;
  --glacier: #d4a854;
  --muted: #c3b8aa;
  --line: rgba(240, 231, 221, 0.22);
  --ambient-one: rgba(156, 111, 58, 0.13);
  --ambient-two: rgba(212, 168, 84, 0.08);
  --grid-line: rgba(255, 250, 244, 0.018);
  --record-bg: rgba(212, 168, 84, 0.055);
  --faint-line: rgba(240, 231, 221, 0.13);
  --control-bg: #ffffff;
  --control-border: #282623;
  --control-text: #282623;
  --control-active-bg: #282623;
  --control-active-text: #ffffff;
  --control-shadow: #282623;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  background: var(--night);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  color: var(--ice);
  background:
    radial-gradient(circle at 14% 3%, var(--ambient-one), transparent 30rem),
    radial-gradient(circle at 88% 30%, var(--ambient-two), transparent 32rem),
    var(--night);
  transition: color 0.25s ease, background-color 0.25s ease;
}

body::before {
  content: "";
  position: fixed;
  z-index: -1;
  inset: 0;
  opacity: 0.14;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(to bottom, black, transparent 65%);
}

button,
a { color: inherit; }

a { text-decoration: none; }

.storyNav {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 3.2vw, 46px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid #282623;
  backdrop-filter: blur(14px);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.backLink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #282623;
  font: 500 10px/1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.backLink span {
  color: #282623;
  font-size: 18px;
  line-height: 0;
}

.backLink:hover,
.backLink:focus-visible {
  color: #000000;
  outline: none;
}

.navControls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.languageSwitch,
.themeSwitch {
  display: inline-flex;
  align-items: center;
  padding: 0;
  border: 2px solid var(--control-border);
  background: var(--control-bg);
  box-shadow: 3px 3px 0 var(--control-shadow);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.languageSwitch button,
.themeSwitch button {
  min-width: 62px;
  padding: 9px 11px;
  color: var(--control-text);
  background: transparent;
  border: 0;
  font: 500 9px/1 var(--mono);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.themeSwitch button { min-width: 54px; }

.languageSwitch button + button,
.themeSwitch button + button {
  border-left: 2px solid var(--control-border);
}

.languageSwitch button[aria-pressed="true"],
.themeSwitch button[aria-pressed="true"] {
  color: var(--control-active-text);
  background: var(--control-active-bg);
}

.languageSwitch button:not([aria-pressed="true"]):hover,
.themeSwitch button:not([aria-pressed="true"]):hover {
  background: #f0e7dd;
}

.languageSwitch button:focus-visible,
.themeSwitch button:focus-visible {
  position: relative;
  z-index: 1;
  outline: 2px solid #282623;
  outline-offset: 3px;
}

.storyPage {
  position: relative;
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 62px clamp(22px, 6vw, 86px) 120px;
}

.storyCover {
  left: 50%;
  width: 100vw;
  max-width: none;
  margin: 0;
  padding: 0;
  position: relative;
  transform: translateX(-50%);
  background: #ffffff;
  border: 0;
  box-shadow: none;
}

.storyCover img {
  display: block;
  width: 100%;
  height: auto;
}

.storyArticle {
  width: min(700px, 100%);
  margin: 0 auto;
}

.storyArticle[hidden] { display: none; }

.storyHeader {
  min-height: min(68vh, 620px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 100px 0 76px;
}

.storyEyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 38px;
  color: var(--glacier);
  font: 500 9px/1.4 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.storyEyebrow::before {
  content: "";
  width: 38px;
  height: 1px;
  background: var(--glacier);
}

.storyHeader h1 {
  max-width: 660px;
  margin: 0;
  color: var(--ice-bright);
  font-weight: 400;
}

.storyArticle[lang="zh-CN"] .storyHeader h1 {
  font-family: var(--serif-zh);
  font-size: clamp(44px, 8vw, 72px);
  letter-spacing: 0.08em;
}

.storyArticle[lang="en"] .storyHeader h1 {
  font-family: var(--serif-en);
  font-size: clamp(46px, 7vw, 70px);
  font-style: italic;
  line-height: 1.08;
  letter-spacing: -0.035em;
  overflow: visible;
}

.storyDek {
  width: min(530px, 100%);
  margin: 32px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.storyArticle[lang="zh-CN"] .storyDek { font-family: var(--serif-zh); }
.storyArticle[lang="en"] .storyDek { font-family: var(--serif-en); font-size: 16px; }

.storyMeta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 46px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 500 8px/1.4 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.prose {
  padding-top: 10px;
}

.prose p {
  margin: 0 0 1.7em;
  color: var(--ice);
  text-wrap: pretty;
}

.storyArticle[lang="zh-CN"] .prose p {
  font: 400 17px/2.05 var(--serif-zh);
  letter-spacing: 0.025em;
}

.storyArticle[lang="en"] .prose p {
  font: 400 18px/1.82 var(--serif-en);
  letter-spacing: 0.002em;
}

.prose p:first-child::first-letter {
  float: left;
  margin: 0.08em 0.11em 0 0;
  color: var(--glacier);
  font-size: 4.7em;
  line-height: 0.75;
}

.prose .record {
  margin: 2.7em 0;
  padding: 18px 20px;
  color: var(--glacier);
  background: var(--record-bg);
  border-left: 2px solid var(--glacier);
  font-family: var(--mono) !important;
  font-size: 12px !important;
  line-height: 1.7 !important;
  letter-spacing: 0.08em !important;
}

.storyEnd {
  margin-top: 86px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--glacier);
  font: 500 9px/1.6 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.storyFooter {
  width: min(700px, 100%);
  margin: 80px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  border-top: 1px solid var(--faint-line);
  color: var(--muted);
  font: 500 8px/1.4 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.storyFooter a:hover,
.storyFooter a:focus-visible {
  color: var(--glacier);
  outline: none;
}

.reveal-ready .readingReveal {
  opacity: 0;
  filter: blur(3px);
  transform: translate3d(0, 34px, 0);
  transition:
    opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay, 0ms),
    transform 1.05s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay, 0ms),
    filter 0.85s ease-out var(--reveal-delay, 0ms);
  will-change: opacity, transform, filter;
}

.reveal-ready .readingReveal.is-revealed {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0);
  will-change: auto;
}

@media (max-width: 620px) {
  .storyNav {
    height: 56px;
    padding: 0 14px;
  }

  .backLink { font-size: 8px; }

  .navControls { gap: 5px; }

  .languageSwitch,
  .themeSwitch { box-shadow: 2px 2px 0 var(--control-shadow); }

  .languageSwitch button,
  .themeSwitch button {
    min-width: 43px;
    padding: 7px 6px;
    font-size: 8px;
  }

  .storyPage {
    padding: 56px 21px 80px;
  }

  .storyCover {
    width: 100vw;
  }

  .storyHeader {
    min-height: 64vh;
    padding: 72px 0 56px;
  }

  .storyEyebrow { margin-bottom: 28px; }

  .storyArticle[lang="zh-CN"] .storyHeader h1 {
    font-size: clamp(40px, 14vw, 58px);
  }

  .storyArticle[lang="en"] .storyHeader h1 {
    font-size: clamp(43px, 13vw, 58px);
  }

  .storyDek { margin-top: 26px; }

  .storyArticle[lang="zh-CN"] .prose p {
    font-size: 16px;
    line-height: 2;
  }

  .storyArticle[lang="en"] .prose p {
    font-size: 17px;
    line-height: 1.76;
  }

  .storyFooter {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal-ready .readingReveal,
  .reveal-ready .readingReveal.is-revealed {
    opacity: 1;
    filter: none;
    transform: none;
    transition: none;
  }
}