@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600;700&family=Share+Tech+Mono&display=swap');

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

:root {
  --ink: #1a1a2e;
  --red: #ff0000;
  --pink: #ff006e;
  --cyan: #00e5ff;
  --bg: #07030f;
  --txt: #f4ecff;
  --dim: #a893c4;
  --line: rgba(255, 0, 110, 0.32);
  --glass: rgba(26, 26, 46, 0.5);
  --mono: 'Share Tech Mono', 'Fira Code', ui-monospace, 'Courier New', monospace;
}

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

body {
  margin: 0;
  background:
    radial-gradient(1100px 480px at 82% -12%, rgba(255, 0, 110, 0.2), transparent 62%),
    radial-gradient(900px 420px at -8% 18%, rgba(255, 0, 0, 0.16), transparent 66%),
    var(--bg);
  color: var(--txt);
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  min-height: 100vh;
}

body.lock { overflow: hidden; }

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 3px);
  opacity: 0.6;
  mix-blend-mode: screen;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 58;
  pointer-events: none;
  background: radial-gradient(circle at 50% 45%, transparent 52%, rgba(0, 0, 0, 0.6) 100%);
}

::selection { background: var(--pink); color: #fff; }

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

a { color: #ff5fa2; }

/* ---------- 头部 ---------- */
.hud-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem clamp(0.8rem, 3vw, 2rem);
  padding-right: 4.4rem;
  background: linear-gradient(180deg, rgba(8, 3, 16, 0.95), rgba(8, 3, 16, 0.62));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 30px rgba(255, 0, 110, 0.14);
}

.head-nav { display: contents; }

.nav-side {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.1rem;
}

.nav-side--l { grid-column: 1; justify-self: start; }
.nav-side--r { grid-column: 3; justify-self: end; }

.nav-side a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0.5rem 0.6rem;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: color 0.2s, border-color 0.2s, text-shadow 0.2s, transform 0.2s;
}

.nav-side a:hover,
.nav-side a:focus-visible {
  color: #fff;
  border-color: var(--pink);
  text-shadow: 0 0 10px var(--pink);
  transform: translateY(-1px);
}

.brand {
  grid-column: 2;
  justify-self: center;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.4rem 0.5rem;
  color: #fff;
  text-decoration: none;
  font-size: 1.05rem;
  letter-spacing: 0.24em;
  text-shadow: 0 0 8px var(--pink), 0 0 24px rgba(255, 0, 110, 0.6);
}

.brand-mark {
  width: 13px;
  height: 13px;
  flex: none;
  border: 2px solid var(--red);
  transform: rotate(45deg);
  background: rgba(255, 0, 0, 0.25);
  box-shadow: 0 0 10px var(--red);
}

.burger {
  position: absolute;
  right: clamp(0.7rem, 3vw, 1.8rem);
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 44px;
  height: 44px;
  display: grid;
  place-content: center;
  gap: 5px;
  padding: 0;
  cursor: pointer;
  background: rgba(255, 0, 110, 0.09);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--pink);
  box-shadow: 0 0 8px var(--pink);
  transition: transform 0.25s, opacity 0.25s;
}

.hud-head.open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hud-head.open .burger span:nth-child(2) { opacity: 0; }
.hud-head.open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hud-head.open .head-nav {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
  position: fixed;
  inset: 0;
  padding: 5.5rem 1.4rem 2rem;
  background: rgba(6, 2, 13, 0.97);
  backdrop-filter: blur(8px);
}

.hud-head.open .nav-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.hud-head.open .nav-side a {
  justify-content: center;
  min-height: 54px;
  padding: 0.8rem 1.4rem;
  font-size: 1.3rem;
  color: #fff;
  border-width: 1px;
}

/* ---------- 主体网格 ---------- */
.stage {
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr);
  column-gap: clamp(1rem, 3vw, 2.5rem);
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(0.9rem, 3vw, 2rem) 3rem;
}

/* ---------- 首屏 ---------- */
.hero {
  grid-column: 1 / -1;
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding: 7.5rem clamp(0.2rem, 2vw, 2rem) 3.4rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-ghost {
  position: absolute;
  right: -0.06em;
  bottom: -0.22em;
  font-size: clamp(8rem, 25vw, 19rem);
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: rgba(255, 0, 110, 0.05);
  -webkit-text-stroke: 2px rgba(255, 0, 110, 0.24);
  pointer-events: none;
  user-select: none;
}

.hero-in {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: clamp(0.8rem, 2.5vw, 1.6rem);
  flex-wrap: wrap;
  width: 100%;
}

.hero-icon {
  width: clamp(52px, 9vw, 92px);
  height: auto;
  flex: none;
  filter: drop-shadow(0 0 12px rgba(255, 0, 110, 0.75));
  animation: spin 22s linear infinite;
  margin-top: 0.4rem;
}

.hero-copy {
  flex: 1 1 260px;
  min-width: 0;
}

.hero-tag {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.34em;
  color: var(--pink);
  text-shadow: 0 0 10px rgba(255, 0, 110, 0.8);
}

.hero h1 {
  margin: 0.1rem 0 0.9rem;
  font-size: clamp(1.85rem, 6.2vw, 3.9rem);
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: #fff;
  text-shadow: 0 0 16px rgba(255, 0, 110, 0.85), 0 0 44px rgba(255, 0, 0, 0.45);
  animation: glitch 7s infinite;
}

.hero-sub {
  margin: 0;
  max-width: 34em;
  color: var(--dim);
  font-size: 0.97rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes glitch {
  0%, 90%, 100% {
    transform: none;
    text-shadow: 0 0 16px rgba(255, 0, 110, 0.85), 0 0 44px rgba(255, 0, 0, 0.45);
  }
  92% {
    transform: skewX(-3deg) translateX(-3px);
    text-shadow: -2px 0 var(--red), 2px 0 var(--cyan);
  }
  95% {
    transform: skewX(2deg) translateX(3px);
    text-shadow: 3px 0 var(--red), -2px 0 var(--cyan);
  }
  98% { transform: none; }
}

/* ---------- 侧栏 ---------- */
.rail {
  grid-column: 1;
  grid-row: 2;
  align-self: start;
  position: sticky;
  top: 5.3rem;
  display: grid;
  gap: 0.9rem;
  padding-top: 2.6rem;
}

.rail-box {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.9rem 0.95rem;
  backdrop-filter: blur(9px);
  box-shadow: inset 0 0 0 1px rgba(255, 0, 110, 0.06), 0 0 26px rgba(255, 0, 110, 0.12);
}

.rail-h {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  line-height: 1.45;
  color: #fff;
  letter-spacing: 0.03em;
  text-shadow: 0 0 10px rgba(255, 0, 110, 0.8);
}

.subtitle {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--dim);
}

.rail-k {
  margin: 0 0 0.5rem;
  font-size: 0.74rem;
  letter-spacing: 0.26em;
  color: var(--pink);
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.rail-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0.45rem 0.5rem;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.88rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.rail-list a:hover,
.rail-list a:focus-visible {
  color: #fff;
  border-left-color: var(--pink);
  background: rgba(255, 0, 110, 0.12);
}

/* ---------- 正文 ---------- */
.post {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  padding: 2.6rem 0 2rem 2.3rem;
  border-left: 1px solid var(--line);
  counter-reset: sec;
  font-size: 1.02rem;
}

.post > article {
  position: relative;
  padding: 1.5rem 0 2.3rem;
  border-bottom: 1px dashed rgba(255, 0, 110, 0.18);
  scroll-margin-top: 5.6rem;
}

.post > article:last-child { border-bottom: 0; padding-bottom: 0.6rem; }

.post > article::before {
  counter-increment: sec;
  content: counter(sec, decimal-leading-zero);
  position: absolute;
  left: -2.3rem;
  top: 1.9rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--pink);
  text-shadow: 0 0 8px var(--pink);
  opacity: 0.9;
}

.post h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.28rem, 3vw, 1.72rem);
  line-height: 1.4;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.7);
}

.post h3 {
  margin: 1.5rem 0 0.7rem;
  font-size: 1.14rem;
  line-height: 1.5;
  color: var(--pink);
  letter-spacing: 0.03em;
}

.post h4 {
  margin: 1.2rem 0 0.6rem;
  font-size: 1.02rem;
  color: #ffd9e8;
}

.post p { margin: 0 0 1rem; color: #ddd2ef; }
.post strong { color: #fff; }
.post em { color: #ffc3da; font-style: normal; }

.post a {
  color: #ff6aa8;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 0, 110, 0.5);
}

.post a:hover { color: #fff; text-shadow: 0 0 10px var(--pink); }

.post ul, .post ol { margin: 0 0 1rem; padding-left: 1.35rem; }
.post li { margin: 0.35rem 0; }
.post li::marker { color: var(--pink); }

.post blockquote {
  margin: 0 0 1.2rem;
  padding: 0.9rem 1.05rem;
  border-left: 3px solid var(--red);
  border-radius: 4px;
  background: var(--glass);
  backdrop-filter: blur(6px);
}

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

.post table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.94rem;
  margin: 0 0 1.2rem;
}

.post th, .post td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

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

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

.post pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 0.9rem 1rem;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.post code { font-family: var(--mono); font-size: 0.94rem; }

.post hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.5rem 0;
}

/* ---------- 页脚 ---------- */
.tape {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.8rem;
  padding: 2.2rem clamp(0.9rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
  background: linear-gradient(0deg, rgba(255, 0, 110, 0.12), transparent 90%);
}

.tape-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1.25rem, 3.4vw, 2rem);
  letter-spacing: 0.2em;
  color: #fff;
  text-shadow: 0 0 12px var(--pink), 0 0 34px rgba(255, 0, 0, 0.55);
}

.tape-copy {
  justify-self: center;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--dim);
  text-align: center;
}

.tape-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.1rem;
}

.tape-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0.45rem 0.55rem;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: color 0.2s, text-shadow 0.2s;
}

.tape-nav a:hover,
.tape-nav a:focus-visible { color: #fff; text-shadow: 0 0 10px var(--pink); }

/* ---------- 滚动显现 ---------- */
body.js .post > article {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

body.js .post > article.in { opacity: 1; transform: none; }

/* ---------- 断点 ---------- */
@media (max-width: 980px) {
  .nav-side { display: none; }

  .stage { grid-template-columns: minmax(0, 1fr); }

  .hero {
    min-height: 70vh;
    padding: 7rem 0 2.8rem;
  }

  .post {
    grid-column: 1;
    grid-row: auto;
    order: 1;
    border-left: 0;
    padding: 2rem 0 1rem;
  }

  .post > article::before { display: none; }

  .rail {
    grid-column: 1;
    grid-row: auto;
    order: 2;
    position: static;
    padding-top: 0;
    margin-top: 1.6rem;
    gap: 0.8rem;
  }

  .tape {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    text-align: center;
    gap: 0.5rem;
  }

  .tape-nav { justify-content: center; }
}

@media (max-width: 420px) {
  body { font-size: 16.5px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-icon { width: 44px; }
  .post { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  body.js .post > article { opacity: 1; transform: none; }
}

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