@import url('https://fonts.googleapis.com/css2?family=Calistoga:ital@0;1&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --ink: #1a1a2e;
  --ink-deep: #0d0d1a;
  --red: #ff0000;
  --pink: #ff006e;
  --paper: #f2eef7;
  --dim: #b7b1c8;
  --line: rgba(255, 0, 110, 0.34);
  --glass: rgba(255, 255, 255, 0.05);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --display: 'Calistoga', 'Inter', Georgia, 'Songti SC', serif;
}

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

html {
  scroll-behavior: smooth;
  background: var(--ink-deep);
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  color: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 0, 110, 0.075) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(255, 0, 110, 0.075) 0 1px, transparent 1px 72px),
    radial-gradient(900px 620px at 78% -8%, rgba(255, 0, 110, 0.22), transparent 62%),
    radial-gradient(760px 520px at 4% 12%, rgba(255, 0, 0, 0.16), transparent 60%);
  background-attachment: fixed, fixed, scroll, scroll;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  background: repeating-linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.32) 0 1px,
    transparent 1px 3px
  );
  opacity: 0.5;
}

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

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

:focus-visible {
  outline: 2px solid var(--pink);
  outline-offset: 3px;
}

/* ---------- 头部 ---------- */
.top {
  position: fixed;
  inset: 0 0 auto 0;
  width: 100%;
  max-width: 100%;
  z-index: 70;
  background: linear-gradient(180deg, rgba(13, 13, 26, 0.95), rgba(13, 13, 26, 0.72));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.mtog {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.brandbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px clamp(14px, 4vw, 44px);
}

.brand {
  min-width: 0;
  margin-right: auto;
  text-decoration: none;
  color: #fff;
  font-family: var(--display);
  font-size: clamp(19px, 4.6vw, 27px);
  letter-spacing: 0.02em;
  line-height: 1.1;
  text-shadow: 0 0 16px rgba(255, 0, 110, 0.9), 0 0 34px rgba(255, 0, 0, 0.45);
}

.brand-logo {
  height: 30px;
  width: auto;
}

.contact {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0 12px;
  text-decoration: none;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  border: 1px solid var(--line);
  transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.contact:hover {
  color: #fff;
  border-color: var(--pink);
  box-shadow: 0 0 14px rgba(255, 0, 110, 0.55);
}

.burger {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 9px;
  min-height: 44px;
  padding: 0 13px;
  cursor: pointer;
  color: #fff;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  border: 2px solid var(--red);
  box-shadow: 0 0 12px rgba(255, 0, 0, 0.55), inset 0 0 12px rgba(255, 0, 0, 0.25);
  transition: background 0.2s, box-shadow 0.2s;
}

.burger:hover {
  background: rgba(255, 0, 0, 0.14);
  box-shadow: 0 0 22px rgba(255, 0, 0, 0.8), inset 0 0 16px rgba(255, 0, 0, 0.35);
}

.bars {
  display: block;
  width: 17px;
  height: 2px;
  background: var(--red);
  position: relative;
  box-shadow: 0 0 8px var(--red);
}

.bars::before,
.bars::after {
  content: '';
  position: absolute;
  left: 0;
  width: 17px;
  height: 2px;
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

.bars::before {
  top: -5px;
}

.bars::after {
  top: 5px;
}

.mtog:checked ~ .brandbar .burger {
  background: var(--red);
  color: #12000a;
}

.mtog:checked ~ .brandbar .bars,
.mtog:checked ~ .brandbar .bars::before,
.mtog:checked ~ .brandbar .bars::after {
  background: #12000a;
  box-shadow: none;
}

/* ---------- 全屏菜单 ---------- */
.menu {
  position: fixed;
  inset: 0;
  z-index: 65;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(78px + 8vh) clamp(18px, 6vw, 60px) 40px;
  overflow-y: auto;
  overflow-x: hidden;
  background: rgba(13, 13, 26, 0.97);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mtog:checked ~ .menu {
  opacity: 1;
  visibility: visible;
}

.menu p {
  margin: 0;
  width: 100%;
  max-width: 620px;
  counter-reset: mi;
}

.menu a {
  display: block;
  padding: 12px 4px;
  text-decoration: none;
  color: #fff;
  font-family: var(--display);
  font-size: clamp(20px, 5.4vw, 32px);
  line-height: 1.25;
  border-bottom: 1px solid rgba(255, 0, 110, 0.28);
  counter-increment: mi;
  transition: transform 0.18s ease, color 0.18s ease, text-shadow 0.18s ease;
}

.menu a::before {
  content: '0' counter(mi);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--pink);
  margin-right: 14px;
  vertical-align: 0.4em;
}

.menu a:hover {
  color: var(--pink);
  transform: translateX(8px);
  text-shadow: 0 0 20px rgba(255, 0, 110, 0.85);
}

/* ---------- 主体 ---------- */
main {
  padding-top: 68px;
  overflow-x: clip;
}

.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 4vw, 34px);
  padding: clamp(28px, 6vw, 60px) clamp(16px, 4vw, 40px) clamp(34px, 6vw, 56px);
  overflow-x: clip;
  text-align: center;
}

.hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 12px;
  background: linear-gradient(90deg, var(--red), var(--pink) 55%, #7a1bff);
  transform: skewY(-1.4deg);
  box-shadow: 0 0 26px rgba(255, 0, 110, 0.7);
}

.hero-copy {
  max-width: 860px;
  min-width: 0;
  width: 100%;
}

.hero h1 {
  margin: 0 0 14px;
  font-family: var(--display);
  font-size: clamp(29px, 7vw, 62px);
  line-height: 1.18;
  font-weight: 400;
  color: #fff;
  letter-spacing: 0.01em;
  overflow-wrap: break-word;
  text-shadow: 0 0 18px rgba(255, 0, 110, 0.85), 0 0 46px rgba(255, 0, 0, 0.55),
    3px 3px 0 rgba(255, 0, 110, 0.35);
  animation: glitch 7s steps(1, end) infinite;
}

.lede {
  margin: 0 auto;
  max-width: 48ch;
  color: var(--dim);
  font-size: 17px;
  overflow-wrap: break-word;
}

.hero-fig {
  margin: 0;
  width: 100%;
  max-width: 900px;
}

.hero-fig img {
  width: 100%;
  max-height: 44vh;
  object-fit: cover;
  border: 2px solid var(--pink);
  box-shadow: 0 0 34px rgba(255, 0, 110, 0.4);
  filter: saturate(1.15) contrast(1.05);
}

.hero-fig--art {
  border: 2px solid var(--pink);
  box-shadow: 0 0 34px rgba(255, 0, 110, 0.35);
  padding: 6px;
}

.hero-art {
  aspect-ratio: 16 / 7;
  background-color: #140f24;
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 0, 110, 0.35) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(255, 0, 110, 0.35) 0 1px, transparent 1px 34px),
    radial-gradient(60% 80% at 50% 100%, rgba(255, 0, 0, 0.5), transparent 70%);
}

.hero-fig figcaption {
  padding-top: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--pink);
  text-align: center;
}

/* ---------- 正文与侧栏 ---------- */
.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 282px;
  gap: clamp(22px, 4vw, 46px);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(34px, 6vw, 64px) clamp(16px, 4vw, 40px);
}

.prose {
  min-width: 0;
  counter-reset: sec;
  color: #ded9ea;
  font-size: 17px;
  line-height: 1.85;
  overflow-wrap: break-word;
  word-break: break-word;
}

.prose > article {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 42px);
  margin-bottom: clamp(26px, 4vw, 42px);
  border-bottom: 1px dashed rgba(255, 0, 110, 0.3);
  scroll-margin-top: 104px;
  counter-increment: sec;
}

.prose > article:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.prose > article::before {
  content: '0' counter(sec);
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: rgba(255, 0, 110, 0.9);
}

.prose h2,
.prose h3 {
  color: #fff;
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin: 0 0 0.55em;
  overflow-wrap: break-word;
}

.prose h2 {
  font-size: clamp(23px, 4vw, 34px);
  text-shadow: 0 0 18px rgba(255, 0, 0, 0.6);
}

.prose h3 {
  font-size: clamp(19px, 3vw, 24px);
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.55);
  margin-top: 1.4em;
}

.prose h2 small,
.prose h3 small {
  display: block;
  margin-bottom: 9px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--pink);
  text-shadow: none;
}

.prose p {
  margin: 0 0 1.05em;
}

.prose a {
  color: var(--pink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  background: rgba(255, 0, 110, 0.16);
}

.prose strong {
  color: #fff;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1em;
  padding-left: 1.3em;
}

.prose li {
  margin-bottom: 0.45em;
}

.prose li::marker {
  color: var(--pink);
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 14px 18px;
  border-left: 3px solid var(--red);
  background: rgba(255, 0, 0, 0.09);
  color: #efe9f6;
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose figure {
  margin: 1.5em 0;
  max-width: 100%;
}

.prose figure img {
  width: 100%;
  border: 2px solid var(--line);
}

.prose figcaption {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

.prose img,
.prose iframe,
.prose video {
  max-width: 100%;
}

.prose img {
  border: 1px solid var(--line);
}

.prose pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 12px 14px;
  background: rgba(13, 13, 26, 0.8);
  border: 1px solid var(--line);
}

.prose table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: 16px;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  overflow-wrap: break-word;
}

.prose th {
  background: rgba(255, 0, 110, 0.12);
  color: #fff;
}

.prose hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 2em 0;
}

.prose code {
  font-family: var(--mono);
  font-size: 15px;
  background: rgba(255, 0, 110, 0.14);
  padding: 2px 6px;
  overflow-wrap: anywhere;
}

/* ---------- 侧栏 ---------- */
.rail {
  position: sticky;
  top: 96px;
  min-width: 0;
  padding: 18px 18px 10px;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(9px);
  box-shadow: inset 0 0 30px rgba(255, 0, 110, 0.08);
}

.eyebrow {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--pink);
}

.rail-h {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 400;
  color: #fff;
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ri;
}

.rail-list li {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.rail-list li:first-child {
  border-top: 0;
}

.rail-list a {
  display: block;
  padding: 11px 0;
  min-height: 42px;
  text-decoration: none;
  color: #ded9ea;
  font-size: 15px;
  counter-increment: ri;
  transition: color 0.18s, padding-left 0.18s;
}

.rail-list a::before {
  content: '0' counter(ri);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--pink);
  margin-right: 9px;
}

.rail-list a:hover {
  color: #fff;
  padding-left: 5px;
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.8);
}

/* ---------- 页脚 ---------- */
.foot {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 0, 110, 0.07), rgba(13, 13, 26, 0.94));
  padding: clamp(28px, 5vw, 48px) clamp(16px, 4vw, 40px) 16px;
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 4vw, 44px);
  max-width: 1180px;
  margin: 0 auto;
}

.foot dl {
  margin: 0;
  min-width: 0;
}

.foot dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--pink);
  margin-bottom: 8px;
}

.foot dd {
  margin: 0;
  color: var(--dim);
  font-size: 16px;
  overflow-wrap: break-word;
}

.foot dd a {
  display: block;
  padding: 10px 0;
  min-height: 44px;
  color: #ded9ea;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: color 0.18s, padding-left 0.18s;
}

.foot dd a:hover {
  color: var(--pink);
  padding-left: 5px;
}

.foot-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  max-width: 1180px;
  margin: clamp(18px, 4vw, 32px) auto 0;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

.copy {
  margin: 0;
}

.to-top {
  margin: 0;
}

.to-top a {
  display: inline-block;
  padding: 10px 0;
  min-height: 44px;
  color: var(--pink);
  text-decoration: none;
}

.to-top a:hover {
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.9);
}

/* ---------- 滚动显现 ---------- */
.js .prose > article,
.js .rail {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .in {
  opacity: 1;
  transform: none;
}

@keyframes glitch {
  0%,
  92%,
  100% {
    transform: none;
  }
  93% {
    transform: translate(-2px, 1px) skewX(-1.2deg);
  }
  95% {
    transform: translate(2px, -1px) skewX(1deg);
  }
  97% {
    transform: translate(-1px, 0);
  }
}

/* ---------- 移动端 ---------- */
@media (max-width: 860px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .rail {
    position: static;
    top: auto;
  }

  .hero {
    min-height: auto;
    padding-top: clamp(26px, 8vw, 44px);
  }

  .hero-fig img {
    max-height: none;
  }

  .foot-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .foot-bar {
    flex-wrap: wrap;
  }
}

@media (max-width: 420px) {
  .burger,
  .contact {
    padding: 0 9px;
    letter-spacing: 0.1em;
  }

  .brandbar {
    gap: 7px;
    padding-left: 12px;
    padding-right: 12px;
  }

  .hero {
    padding-left: 14px;
    padding-right: 14px;
  }

  .shell {
    padding-left: 14px;
    padding-right: 14px;
  }

  .menu {
    padding-left: 16px;
    padding-right: 16px;
  }

  .menu a {
    font-size: 19px;
  }

  .hero-fig--art {
    padding: 4px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .prose > article,
  .js .rail {
    opacity: 1;
    transform: none;
  }
}

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