:root {
  color-scheme: light;
  --paper: oklch(0.97 0.02 88);
  --paper-strong: oklch(0.93 0.03 84);
  --ink: oklch(0.2 0.02 74);
  --muted: oklch(0.43 0.03 72);
  --line: oklch(0.84 0.03 83);
  --grass: oklch(0.44 0.12 142);
  --ember: oklch(0.58 0.16 39);
  --water: oklch(0.55 0.1 226);
  --white: oklch(0.99 0 0);
  --shadow: 0 24px 60px color-mix(in oklch, var(--ink) 14%, transparent);
  font-family:
    "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--grass);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--ember);
}

.copy-button {
  appearance: none;
  position: relative;
  display: inline;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: inherit;
  line-height: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.copy-button:hover {
  color: var(--grass);
}

.copy-button:focus-visible {
  outline: 2px solid var(--grass);
  outline-offset: 3px;
}

.copy-button::after {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 5px);
  z-index: 30;
  transform: translateX(-50%);
  padding: 3px 7px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
  box-shadow: 0 8px 18px color-mix(in oklch, var(--ink) 10%, transparent);
  pointer-events: none;
}

.copy-button[data-copied="true"]::after {
  content: "已复制";
}

.copy-button[data-copied="failed"]::after {
  content: "复制失败";
}

.home-redirect {
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--white);
}

.redirect-shell {
  width: min(420px, 100%);
  padding: 0;
  color: var(--ink);
  text-align: left;
}

.redirect-kicker,
.site-mark,
.eyebrow {
  margin: 0;
  color: var(--ember);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.redirect-shell h1 {
  margin: 8px 0 6px;
  font-size: clamp(1.75rem, 7vw, 2.4rem);
  line-height: 1.18;
  text-wrap: balance;
}

.redirect-shell p {
  margin: 0 0 18px;
  color: var(--muted);
}

.text-link {
  color: var(--grass);
  font-weight: 800;
  text-decoration-thickness: 0.1em;
}

.text-link:hover {
  color: var(--ember);
}

.noscript-tip {
  position: fixed;
  inset: auto 16px 16px;
  padding: 12px 14px;
  background: var(--white);
  border: 1px solid var(--line);
}

.intro-page {
  background: var(--white);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 52px);
  border-bottom: 1px solid color-mix(in oklch, var(--line) 76%, transparent);
  background: color-mix(in oklch, var(--white) 88%, transparent);
  backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition:
    opacity 220ms ease,
    transform 220ms ease,
    visibility 0s linear 220ms;
}

.site-header.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition:
    opacity 220ms ease,
    transform 220ms ease,
    visibility 0s;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  color: inherit;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--grass);
}

.hero {
  display: block;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(46px, 9vw, 108px) 0 clamp(30px, 6vw, 58px);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 760px;
}

.hero-copy h1 {
  margin: 12px 0 16px;
  font-family:
    "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC",
    sans-serif;
  font-size: clamp(3.4rem, 10vw, 7.6rem);
  font-weight: 900;
  line-height: 0.96;
  text-wrap: balance;
}

.hero-copy p {
  width: min(620px, 100%);
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.04rem, 2vw, 1.25rem);
  text-wrap: pretty;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  width: min(620px, 100%);
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.93rem;
}

.hero-meta span {
  min-width: 112px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.server-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(1120px, calc(100% - 36px));
  margin: -1px auto clamp(42px, 7vw, 78px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--line);
}

.server-facts div {
  min-width: 0;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--white);
}

.server-facts dt {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.83rem;
}

.server-facts dd {
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 800;
  word-break: break-word;
}

.content-shell {
  width: min(980px, calc(100% - 36px));
  margin: 0 auto;
  padding-bottom: clamp(52px, 9vw, 96px);
}

.prose {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 5vw, 56px);
  font-size: 1.055rem;
}

.prose h1,
.prose h2,
.prose h3 {
  font-family:
    "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  line-height: 1.16;
  text-wrap: balance;
}

.prose h1 {
  margin: 0 0 24px;
  font-size: clamp(2rem, 5vw, 4rem);
}

.prose h2 {
  margin: clamp(46px, 7vw, 72px) 0 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: clamp(1.85rem, 4vw, 3.3rem);
}

.prose h3 {
  margin: 32px 0 12px;
  font-size: 1.4rem;
}

.prose p,
.prose li,
.prose blockquote {
  color: color-mix(in oklch, var(--ink) 82%, var(--muted));
  text-wrap: pretty;
}

.prose p {
  margin: 0 0 16px;
}

.prose strong {
  color: var(--ink);
  font-weight: 850;
}

.prose ul,
.prose ol {
  margin: 0 0 22px;
  padding-left: 1.35em;
}

.prose li + li {
  margin-top: 9px;
}

.prose blockquote {
  margin: 18px 0 22px;
  padding: 14px 18px;
  border-inline-start: 3px solid var(--water);
  background: color-mix(in oklch, var(--water) 8%, white);
}

.media-frame {
  width: min(920px, 100%);
  margin: clamp(24px, 5vw, 44px) auto;
  border: 1px solid var(--line);
  background: var(--white);
}

.media-frame img {
  width: 100%;
  max-height: min(74vh, 760px);
  object-fit: contain;
  background: var(--white);
}

.media-frame figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.site-footer {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 860px) {
  .site-header {
    padding-block: 12px;
  }

  .server-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .site-header,
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .server-facts {
    grid-template-columns: 1fr;
  }
}