/* =========================================================================
   九游会主站 · 共享样式 /assets/site.css
   档案室里的赛场：深墨蓝档案库 · 奶油纸档案卡 · 荧光青脉冲 · 信号橙入口
   ========================================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #0B1B2B;
  --ink-2: #102A43;
  --ink-3: #0d2334;
  --paper: #F5EFE2;
  --frost: #E8EDF2;
  --cyan: #2DE2E6;
  --orange: #FF6B35;
  --espresso: #1A1410;
  --slate: #4A6572;
  --amber: #F7C948;
  --alarm: #D64545;
  --mint: #F4FBFA;

  --rail: 100px;
  --bar-h: 62px;
  --shell: min(1240px, 100% - 40px);

  --r-lg: 16px;
  --r-md: 12px;
  --r-sm: 8px;

  --font-display: "Oswald", "Barlow Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "Noto Sans Mono CJK SC", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.22, .8, .28, 1);
  --shadow-lg: 0 22px 60px rgba(2, 9, 18, .5);
  --line: rgba(232, 237, 242, .14);
  --line-strong: rgba(232, 237, 242, .26);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--bar-h) + 18px);
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

ul[class],
ol[class] { list-style: none; padding: 0; }

img, svg, video, canvas { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 560px at 84% -12%, rgba(45, 226, 230, .10), transparent 62%),
    radial-gradient(820px 480px at 2% 106%, rgba(255, 107, 53, .07), transparent 60%);
  background-attachment: fixed;
  color: var(--frost);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  min-height: 100vh;
  overflow-wrap: break-word;
}

/* 坐标索引网格：档案库的底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(232, 237, 242, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 237, 242, .035) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.005em;
  color: var(--mint);
}
h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.4rem); line-height: 1.28; }
h4 { font-size: 1.02rem; letter-spacing: .04em; }

p { text-wrap: pretty; }

strong { color: var(--mint); }

.mono,
.data,
time,
code,
kbd,
samp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

::selection { background: var(--cyan); color: #04202a; }

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

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

#main-content { display: block; }
#main-content:focus { outline: none; }

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: var(--shell);
  margin-inline: auto;
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--12 { grid-template-columns: minmax(0, 1fr); }

.stack > * + * { margin-top: 1rem; }
.stack-lg > * + * { margin-top: 1.6rem; }

@media (min-width: 900px) {
  .grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-9 { grid-column: span 9; }
  .span-12 { grid-column: span 12; }
}

/* ---------- 5. 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: .72em 1.2em;
  background: var(--paper);
  color: var(--espresso);
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  text-decoration: none;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-lg);
  transform: translateY(-180%);
  transition: transform .22s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 6. 头部 · 侧边轨道 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: none;
}

.rail-glass {
  display: block;
  position: absolute;
  inset: 0;
  background: rgba(11, 27, 43, .88);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
  pointer-events: none;
}

.rail-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--bar-h);
  padding: 10px 16px;
}

/* 品牌 */
.rail-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1 1 auto;
  text-decoration: none;
}
.rail-brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(150deg, var(--cyan), #169ba8);
  color: #04202a;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .02em;
  box-shadow: 0 0 0 1px rgba(45, 226, 230, .35), 0 8px 22px rgba(45, 226, 230, .18);
}
.rail-brand__words {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.rail-brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .07em;
  line-height: 1.2;
  color: var(--mint);
}
.rail-brand__sub {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .06em;
  line-height: 1.3;
  color: var(--slate);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 目录按钮 */
.nav-toggle {
  flex: none;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid rgba(45, 226, 230, .42);
  border-radius: 999px;
  background: rgba(45, 226, 230, .09);
  color: var(--mint);
  font-family: var(--font-display);
  font-size: .82rem;
  letter-spacing: .14em;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.nav-toggle:hover { background: rgba(45, 226, 230, .18); border-color: var(--cyan); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cyan);
  transition: transform .26s var(--ease), top .26s var(--ease), bottom .26s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { bottom: 4px; transform: rotate(-45deg); }

/* 抽屉导航（移动 / 平板） */
.rail-nav {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  width: min(322px, 86vw);
  padding: 18px 18px 30px;
  background: var(--ink-2);
  border-right: 1px solid rgba(45, 226, 230, .3);
  box-shadow: 26px 0 70px rgba(2, 8, 16, .6);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(-104%);
  visibility: hidden;
  transition: transform .34s var(--ease), visibility 0s linear .34s;
}
.site-header[data-open] .rail-nav,
.rail-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
  transition-delay: 0s, 0s;
}

.rail-nav__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 10px;
  align-items: center;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.rail-nav__head-title {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .08em;
  color: var(--mint);
}
.rail-nav__head-sub {
  grid-column: 1;
  grid-row: 2;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .08em;
  color: var(--slate);
}
.rail-nav__close {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: rgba(232, 237, 242, .06);
  color: var(--frost);
  font-size: .85rem;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.rail-nav__close:hover { background: rgba(255, 107, 53, .18); border-color: var(--orange); color: var(--mint); }

.rail-nav__list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.rail-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--frost);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-decoration: none;
  transition: background .2s, color .2s, border-color .2s, box-shadow .2s;
}
.rail-nav__link:hover { background: rgba(45, 226, 230, .1); color: var(--mint); }
.rail-nav__link[aria-current="page"] {
  background: rgba(45, 226, 230, .14);
  border-color: rgba(45, 226, 230, .42);
  color: #ffffff;
  box-shadow: inset 3px 0 0 var(--cyan);
}
.rail-nav__idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--slate);
  min-width: 2.2em;
}
.rail-nav__link[aria-current="page"] .rail-nav__idx { color: var(--cyan); }
.rail-nav__label { display: inline-block; }
.rail-nav__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--orange);
  white-space: nowrap;
}
.rail-nav__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, .16);
  animation: anchor-pulse 2.6s var(--ease) infinite;
}
.rail-nav__note {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: var(--slate);
}

/* 桌面轨道底部脉冲 */
.rail-foot { display: none; }

/* 滚动进度 */
.rail-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
}

@keyframes anchor-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(255, 107, 53, .16); }
  50% { box-shadow: 0 0 0 7px rgba(255, 107, 53, .06); }
}

/* 打开时的遮罩 */
@media (max-width: 1023px) {
  .site-header[data-open]::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(4, 12, 22, .74);
  }
  .site-header[data-open] { pointer-events: auto; }
}

body.is-nav-open { overflow: hidden; }

/* ---------- 7. 头部 · 桌面侧边轨道 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail); }

  .skip-link { left: calc(var(--rail) + 12px); }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail);
    height: 100vh;
    height: 100dvh;
    z-index: 60;
  }
  .rail-glass {
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: rgba(16, 42, 67, .66);
    -webkit-backdrop-filter: blur(16px) saturate(1.25);
    backdrop-filter: blur(16px) saturate(1.25);
  }
  .rail-inner {
    flex-direction: column;
    align-items: center;
    gap: 16px;
    height: 100%;
    min-height: 0;
    padding: 22px 10px 18px;
    overflow-y: auto;
    scrollbar-width: none;
  }
  .rail-inner::-webkit-scrollbar { display: none; }

  .rail-brand {
    flex: none;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
  }
  .rail-brand__mark {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 1.05rem;
  }
  .rail-brand__words {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    flex-direction: column;
    align-items: center;
    gap: 7px;
    margin-inline: auto;
    min-width: 0;
    width: auto;
  }
  .rail-brand__name {
    font-size: .92rem;
    letter-spacing: .2em;
    line-height: 1;
  }
  .rail-brand__sub {
    writing-mode: vertical-rl;
    font-size: .6rem;
    letter-spacing: .16em;
    line-height: 1;
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    color: var(--slate);
  }

  .nav-toggle { display: none; }
  .rail-nav__head { display: none; }
  .rail-nav__note { display: none; }

  .rail-nav {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    overflow: visible;
    transform: none;
    visibility: visible;
    transition: none;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 0;
  }

  .rail-nav__list {
    align-items: center;
    gap: 10px;
  }
  .rail-nav__link {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 10px 7px;
    border-radius: 12px;
    font-size: .85rem;
    letter-spacing: .1em;
  }
  .rail-nav__link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--cyan), 0 0 0 1px rgba(45, 226, 230, .18); }
  .rail-nav__idx { min-width: 0; font-size: .66rem; letter-spacing: .16em; }
  .rail-nav__label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .18em;
    line-height: 1;
    display: block;
  }
  .rail-nav__tag {
    margin-left: 0;
    font-size: .6rem;
    letter-spacing: .12em;
  }
  .rail-nav__dot { width: 6px; height: 6px; }

  .rail-foot {
    display: flex;
    flex: none;
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  .rail-foot__track {
    position: relative;
    display: block;
    width: 2px;
    height: 44px;
    border-radius: 2px;
    background: rgba(232, 237, 242, .16);
    overflow: hidden;
  }
  .rail-foot__pulse {
    position: absolute;
    left: 0;
    top: -10px;
    width: 2px;
    height: 10px;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
    animation: rail-scan 6s linear infinite;
  }
  .rail-foot__label {
    font-family: var(--font-mono);
    font-size: .6rem;
    letter-spacing: .1em;
    color: var(--slate);
  }

  .rail-progress {
    left: auto;
    right: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
    background: linear-gradient(180deg, var(--cyan), var(--orange));
    transform: scaleY(var(--progress, 0));
    transform-origin: 50% 0;
  }

  @keyframes rail-scan {
    0% { transform: translateY(0); }
    100% { transform: translateY(64px); }
  }
}

/* 矮屏下的紧凑轨道 */
@media (min-width: 1024px) and (max-height: 880px) {
  .rail-inner { padding: 14px 8px 12px; gap: 10px; }
  .rail-brand { gap: 8px; }
  .rail-brand__mark { width: 36px; height: 36px; font-size: .85rem; }
  .rail-brand__name { font-size: .85rem; }
  .rail-brand__sub { font-size: .54rem; letter-spacing: .1em; }
  .rail-foot { display: none; }
  .rail-nav__list { gap: 6px; }
  .rail-nav__link { padding: 7px 6px; gap: 6px; font-size: .8rem; }
  .rail-nav__label { letter-spacing: .08em; }
  .rail-nav__tag { font-size: .55rem; letter-spacing: .08em; }
}

/* ---------- 8. 通用文字组件 ---------- */
.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  padding: .3em .72em;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--frost);
  white-space: nowrap;
}
.tag--cyan { border-color: rgba(45, 226, 230, .5); background: rgba(45, 226, 230, .1); color: var(--cyan); }
.tag--orange { border-color: rgba(255, 107, 53, .55); background: rgba(255, 107, 53, .1); color: var(--orange); }
.tag--amber { border-color: rgba(247, 201, 72, .5); background: rgba(247, 201, 72, .1); color: var(--amber); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .78em 1.45em;
  border: 1px solid rgba(45, 226, 230, .45);
  border-radius: 999px;
  background: rgba(45, 226, 230, .09);
  color: var(--mint);
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s, border-color .2s, color .2s;
}
.btn:hover {
  background: rgba(45, 226, 230, .2);
  border-color: var(--cyan);
  transform: translateY(-2px);
}
.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #230d04;
}
.btn--primary:hover { background: #ff8459; border-color: #ff8459; color: #230d04; }
.btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--espresso);
}
.btn--paper:hover { background: #ffffff; border-color: #ffffff; color: var(--espresso); }
.btn--ghost { background: transparent; }

/* ---------- 10. 面板与档案卡 ---------- */
.panel {
  padding: clamp(20px, 2.4vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(16, 42, 67, .72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.panel--paper {
  background: var(--paper);
  border-color: rgba(26, 20, 16, .1);
  color: var(--espresso);
}
.panel--paper h2,
.panel--paper h3,
.panel--paper h4 { color: var(--espresso); }
.panel--paper .kicker { color: #0F5D68; }
.panel--paper .tag { border-color: rgba(26, 20, 16, .22); color: var(--espresso); }

.card {
  padding: clamp(18px, 2vw, 28px);
  border-radius: var(--r-lg);
  background: var(--paper);
  color: var(--espresso);
  box-shadow: var(--shadow-lg);
}
.card h2,
.card h3,
.card h4 { color: var(--espresso); }
.card a { color: #0F5D68; }
.card a:hover { color: var(--orange); }
.card .kicker { color: #0F5D68; }
.card .tag { border-color: rgba(26, 20, 16, .22); color: var(--espresso); }

/* ---------- 11. 媒体容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  aspect-ratio: 16 / 9;
  background-color: var(--ink-2);
  background-image:
    linear-gradient(rgba(45, 226, 230, .1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 226, 230, .1) 1px, transparent 1px),
    linear-gradient(140deg, #123047, #0B1B2B);
  background-size: 40px 40px, 40px 40px, cover;
}
.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--paper {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(26, 20, 16, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 20, 16, .08) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
  border-color: rgba(26, 20, 16, .12);
}
.media > img,
.media > video,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--slate);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb { padding-top: 20px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--slate);
}
.breadcrumb__item { display: flex; align-items: center; gap: .55em; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(232, 237, 242, .28);
}
.breadcrumb__item a {
  color: var(--frost);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.breadcrumb__item a:hover { color: var(--cyan); border-bottom-color: currentColor; }
.breadcrumb__item [aria-current="page"] { color: var(--cyan); }

/* ---------- 13. 长文与目录 ---------- */
.prose {
  max-width: 68ch;
  font-size: 1.02rem;
}
.prose > * + * { margin-top: 1.15em; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
.prose a:hover { color: var(--amber); }
.prose ul,
.prose ol { padding-left: 1.35em; }
.prose li + li { margin-top: .5em; }
.prose blockquote {
  padding-left: 1.1em;
  border-left: 3px solid var(--cyan);
  color: var(--frost);
}
.prose code {
  padding: .12em .42em;
  border-radius: 5px;
  background: rgba(45, 226, 230, .12);
  color: var(--cyan);
  font-size: .9em;
}

.toc { padding: 20px; border: 1px solid var(--line); border-radius: var(--r-lg); background: rgba(16, 42, 67, .6); }
.toc__title {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .22em;
  color: var(--amber);
  margin-bottom: 10px;
}
.toc__list { margin: 0; padding: 0; list-style: none; }
.toc__list a {
  display: block;
  padding: .42em 0 .42em .9em;
  border-left: 2px solid rgba(232, 237, 242, .16);
  color: var(--frost);
  font-size: .9rem;
  text-decoration: none;
  transition: color .2s, border-color .2s, padding-left .2s;
}
.toc__list a:hover { color: var(--cyan); border-left-color: var(--cyan); }
.toc__list a[aria-current="true"] { color: var(--cyan); border-left-color: var(--cyan); }
@media (min-width: 1024px) {
  .toc { position: sticky; top: 96px; }
}

/* ---------- 14. 数据表 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(16, 42, 67, .5);
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: .86rem;
  font-variant-numeric: tabular-nums;
}
.table-wrap th,
.table-wrap td {
  padding: .85em 1.05em;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.table-wrap thead th {
  background: rgba(11, 27, 43, .9);
  color: var(--cyan);
  font-weight: 500;
  letter-spacing: .08em;
}
.table-wrap tbody tr:hover { background: rgba(45, 226, 230, .06); }
.table-wrap tbody tr:last-child td { border-bottom: 0; }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  background: var(--ink-2);
  border-top: 1px solid rgba(45, 226, 230, .24);
  color: var(--frost);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange) 52%, rgba(255, 107, 53, 0) 100%);
  opacity: .9;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(44px, 6vw, 76px) clamp(28px, 4vw, 48px);
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: .05em;
  line-height: 1.15;
  color: var(--mint);
}
.footer-brand__line {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--cyan);
}
.footer-brand__meta {
  margin-top: 16px;
  max-width: 30ch;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--slate);
}
.footer-brand .btn { margin-top: 22px; }

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .22em;
  color: var(--amber);
}
.footer-col__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-col__list a {
  display: block;
  padding: .38em 0;
  color: var(--frost);
  font-size: .94rem;
  text-decoration: none;
  transition: color .2s, transform .2s var(--ease);
}
.footer-col__list a:hover { color: var(--cyan); transform: translateX(3px); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--slate);
}
.footer-base > p { margin: 0; }
.footer-base__legal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--frost);
}
.footer-base__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}
.footer-base__contact {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
}
.footer-base__k { color: var(--slate); }
.footer-base__v { color: var(--frost); }
.footer-base__copy { margin-left: auto; }

@media (max-width: 767px) {
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-base__copy { margin-left: 0; }
  .footer-base__contact { flex-direction: column; align-items: flex-start; }
}

/* ---------- 16. 滚动显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
  .js-reveal [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .rail-nav { transition: none; }
  .btn:hover,
  .footer-col__list a:hover { transform: none; }
}