@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@700&display=swap');

:root {
  --ink: #000000;
  --panel: #121212;
  --panel-2: #0a0a0a;
  --cream: #f3efe6;
  --soft: #cfc9bc;
  --dim: #8e8981;
  --line: #1f1f1f;
  --line-2: #2c2c2c;
  --mint: #6cffc2;
  --blue: #6fa8ff;
  --magenta: #ff6fcf;
  --gold: #ffd27a;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--cream);
  font-family: ui-sans-serif, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.005em;
}

h1,
h2,
h3,
.brand,
.jnum {
  font-family: "Space Grotesk", ui-sans-serif, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
}

img {
  max-width: 100%;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

::selection {
  background: var(--mint);
  color: #000;
}

/* 顶部细条口号 */
.ann {
  background-color: var(--panel-2);
  background-image: radial-gradient(#191919 1px, transparent 1px);
  background-size: 10px 10px;
  border-bottom: 1px solid var(--line);
}

.ann p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 0.95rem;
  color: var(--dim);
}

.ann p::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--mint);
  box-shadow: 0 0 10px var(--mint);
  flex: 0 0 auto;
}

.ann b {
  color: var(--mint);
  letter-spacing: 0.04em;
}

/* 页头，品牌居中，菜单分列两侧 */
.hdr {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}

.hnav ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hnav-l ol {
  justify-content: flex-start;
}

.hnav-r ol {
  justify-content: flex-end;
}

.hnav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 10px;
  border: 1px solid transparent;
  color: var(--soft);
  text-decoration: none;
  font-size: 1rem;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.hnav a:hover {
  color: var(--cream);
  background: #0d0d0d;
  border-color: var(--line-2);
}

.nico {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--line-2);
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.hnav a:hover .nico {
  background: var(--mint);
  box-shadow: 0 0 10px var(--mint);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line-2);
  background: #0c0c0c;
  color: var(--cream);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand:hover {
  border-color: var(--mint);
}

.bmark {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  display: inline-block;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(108, 255, 194, 0.5);
}

img.bmark {
  object-fit: cover;
}

.bname {
  white-space: nowrap;
}

/* 二级粘性锚点条 */
.strip {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #060606;
  border-bottom: 1px solid var(--line-2);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.75);
}

.strip nav {
  max-width: 1180px;
  margin: 0 auto;
}

.strip ol {
  display: flex;
  margin: 0;
  padding: 0 24px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 13px;
  border-right: 1px solid var(--line);
  color: var(--dim);
  text-decoration: none;
  font-size: 1rem;
  white-space: nowrap;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.jump a:hover {
  color: var(--cream);
  background: #101010;
}

.jnum {
  font-size: 0.78rem;
  color: var(--mint);
  letter-spacing: 0.06em;
}

/* 主体骨架：aside 在左，正文在右 */
.wrap {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  align-items: start;
  gap: 0 48px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

.wrap > *:not(aside) {
  grid-column: 2;
  min-width: 0;
}

.wrap > section {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding-top: 36px;
  scroll-margin-top: 76px;
}

/* 左侧栏 */
.rail {
  grid-column: 1;
  position: sticky;
  top: 72px;
  align-self: start;
  padding: 18px 16px;
  border: 1px solid var(--line-2);
  background-color: var(--panel);
  background-image: radial-gradient(#171717 1px, transparent 1px);
  background-size: 11px 11px;
}

.rail h2 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.rail h2::before {
  width: 8px;
  height: 8px;
  transform: translateY(-1px);
}

.rail ol {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.rail a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 0 2px;
  border-bottom: 1px dashed var(--line);
  color: var(--soft);
  text-decoration: none;
  font-size: 0.98rem;
}

.rail a:hover {
  color: var(--mint);
}

.rail-note {
  margin: 14px 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--dim);
}

/* 首屏 */
.lead {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  align-items: center;
  gap: 32px;
  min-height: 45vh;
  padding: 28px;
  border: 1px solid var(--line-2);
  background-color: #080808;
  background-image: radial-gradient(#1a1a1a 1px, transparent 1px);
  background-size: 14px 14px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 6px;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--mint);
  box-shadow: 0 0 10px var(--mint);
}

h1 {
  margin: 8px 0 16px;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: #ffffff;
  text-shadow: 0 0 18px rgba(108, 255, 194, 0.16);
}

.lede {
  margin: 0 0 12px;
  max-width: 46ch;
  font-size: 1.06rem;
  color: var(--soft);
}

.hint {
  margin: 0;
  max-width: 52ch;
  font-size: 0.98rem;
  color: var(--dim);
}

.hero-fig {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 230px;
  margin: 0;
  border: 1px solid var(--line-2);
  background-color: #050505;
  background-image: radial-gradient(#1c1c1c 1px, transparent 1px);
  background-size: 8px 8px;
}

.hero-fig img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 350px;
  object-fit: cover;
  filter: contrast(1.06) saturate(0.95);
}

.hero-fig figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  background: #070707;
  font-size: 0.92rem;
  color: var(--dim);
}

/* 正文排版 */
h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
  font-size: clamp(1.4rem, 2.6vw, 1.95rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: #ffffff;
}

h2::before {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(108, 255, 194, 0.6);
  transform: translateY(-2px);
}

h2 > span,
h3 > span {
  position: relative;
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.18rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.wrap > section p {
  max-width: 70ch;
  margin: 0 0 16px;
  color: var(--soft);
}

.wrap > section ul,
.wrap > section ol {
  max-width: 70ch;
  margin: 0 0 18px;
  padding-left: 1.3em;
  color: var(--soft);
}

.wrap > section li {
  margin: 0 0 8px;
}

.wrap > section a {
  color: var(--mint);
  text-decoration-color: rgba(108, 255, 194, 0.45);
}

.wrap > section a:hover {
  text-decoration-thickness: 2px;
}

.wrap > section img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 0 0 18px;
  border: 1px solid var(--line-2);
}

.wrap > section blockquote {
  max-width: 70ch;
  margin: 0 0 18px;
  padding: 6px 0 6px 16px;
  border-left: 3px solid var(--magenta);
  color: var(--soft);
}

.wrap > section blockquote p:last-child {
  margin-bottom: 0;
}

.wrap > section table {
  width: 100%;
  margin: 0 0 20px;
  border-collapse: collapse;
  font-size: 1rem;
}

.wrap > section th,
.wrap > section td {
  padding: 10px 12px;
  border: 1px solid var(--line-2);
  text-align: left;
  color: var(--soft);
}

.wrap > section th {
  background: #101010;
  color: var(--cream);
}

.wrap > section hr {
  margin: 28px 0;
  border: 0;
  border-top: 1px dashed var(--line-2);
}

.wrap > section code {
  padding: 1px 5px;
  border: 1px solid var(--line-2);
  background: #0e0e0e;
  font-size: 0.95rem;
  color: var(--mint);
}

/* 收尾区块 */
.outro div {
  padding: 26px;
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, #0d0d0d, #050505);
}

.link-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--mint);
  color: var(--mint);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.link-more:hover {
  background: var(--mint);
  color: #000000;
}

/* 页脚：单行极简 */
.ftr {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid var(--line-2);
  background: #050505;
}

.f-brand .brand {
  border-color: var(--line);
  font-size: 1rem;
}

.f-nav ol {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.f-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 9px;
  color: var(--dim);
  text-decoration: none;
  font-size: 1rem;
}

.f-nav a:hover {
  color: var(--cream);
}

.f-copy p {
  margin: 0;
  color: var(--dim);
  font-size: 0.95rem;
}

/* 滚动揭示 */
.js .rv {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

/* 响应式 */
@media (max-width: 960px) {
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 22px 16px 56px;
  }

  .wrap > *:not(aside) {
    grid-column: 1;
  }

  .rail {
    position: static;
    margin-bottom: 26px;
    background-image: none;
  }

  .rail ol {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
  }

  .rail a {
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 8px;
  }
}

@media (max-width: 760px) {
  /* 首屏优先：压缩页头与口号，正文首块提到目录之前 */
  .ann p {
    padding: 6px 16px;
    font-size: 0.88rem;
    gap: 8px;
  }

  .ann p span {
    display: none;
  }

  .hdr {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    gap: 6px;
    padding: 10px 12px;
  }

  .hnav,
  .hnav-l,
  .hnav-r {
    width: 100%;
    min-width: 0;
  }

  .hnav ol,
  .hnav-l ol,
  .hnav-r ol {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .hnav a {
    padding: 0 9px;
    white-space: nowrap;
    min-height: 42px;
  }

  .brand {
    justify-content: center;
  }

  .strip ol {
    padding: 0 12px;
  }

  .jump a {
    min-height: 44px;
    padding: 0 11px;
  }

  .wrap {
    padding: 14px 16px 56px;
  }

  .wrap > .lead {
    order: 1;
  }

  .wrap > .rail {
    order: 2;
    margin: 22px 0 0;
  }

  .wrap > section {
    order: 3;
    margin-top: 34px;
    padding-top: 24px;
    scroll-margin-top: 62px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
    gap: 16px;
    padding: 16px;
  }

  .eyebrow {
    margin-bottom: 2px;
    font-size: 0.88rem;
    letter-spacing: 0.12em;
  }

  h1 {
    margin: 4px 0 12px;
    font-size: clamp(1.7rem, 7.4vw, 2.2rem);
  }

  .lede {
    font-size: 1rem;
  }

  .hint {
    font-size: 0.95rem;
  }

  .hero-fig {
    min-height: 160px;
  }

  .outro div {
    padding: 20px;
  }

  .ftr {
    padding: 16px;
  }
}

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

  .js .rv {
    opacity: 1;
    transform: none;
    transition: none;
  }

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

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