/* =========================================================
   新濠指南 · 共享样式表 /assets/site.css
   骨架：蓝图网格底 + 左侧双级轨道 + 深浅纸张分区
   ========================================================= */

/* ---------- 1. tokens ---------- */
:root {
  --abyss-950: #04101A;
  --abyss-900: #071A2B;
  --abyss-700: #0E2C45;
  --neon-400: #35E0D6;
  --neon-600: #12A79C;
  --amber-400: #E8B04B;
  --stone-400: #8C9AA6;
  --paper-50: #F3F1EA;
  --moss-500: #5E7A63;
  --clay-500: #B4694F;
  --ink-900: #0B1418;

  --rail-coord: 88px;
  --rail-index: 240px;
  --shell-offset: calc(var(--rail-coord) + var(--rail-index));
  --topbar-h: 48px;

  --grid-line: rgba(140, 154, 166, 0.12);
  --hair: rgba(140, 154, 166, 0.24);
  --neon-line: rgba(53, 224, 214, 0.4);
  --amber-line: rgba(232, 176, 75, 0.42);
  --moss-line: rgba(94, 122, 99, 0.6);
  --clay-line: rgba(180, 105, 79, 0.55);

  --font-display: "Archivo Narrow", "Arial Narrow", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.24, 1);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper-50);
  background-color: var(--abyss-950);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 52px 52px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: var(--neon-400); }

::selection {
  background: rgba(53, 224, 214, 0.28);
  color: var(--paper-50);
}

:focus-visible {
  outline: 2px solid var(--neon-400);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 3. 排版 ---------- */
h1, .h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.2vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: var(--paper-50);
}

h2, .h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--paper-50);
}

h3, .h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--paper-50);
}

p { margin: 0 0 14px; }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: 17px;
  line-height: 1.75;
  color: #C4D2DB;
  max-width: 62ch;
}

.muted { color: var(--stone-400); }

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--stone-400);
}

.side-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--stone-400);
}

/* ---------- 4. 布局容器 ---------- */
main {
  display: block;
  margin-left: var(--shell-offset);
  min-height: 56vh;
}

.wrap {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 56px);
}

.section { padding-block: clamp(44px, 7vw, 88px); }

.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.plain { list-style: none; margin: 0; padding: 0; }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--hair);
}

.paper {
  background: var(--paper-50);
  color: var(--ink-900);
}

.section--paper {
  background: var(--paper-50);
  color: var(--ink-900);
}

.paper .muted,
.section--paper .muted { color: #5D6873; }

.paper .lead,
.section--paper .lead { color: #2C3A44; }

.paper .annotation,
.paper .side-note,
.section--paper .annotation,
.section--paper .side-note { color: #6B7480; }

.paper .rule,
.section--paper .rule { background: rgba(11, 20, 24, 0.16); }

/* ---------- 5. 网格 ---------- */
.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.split {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 980px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
  }
}

/* ---------- 6. 卡片 ---------- */
.card {
  position: relative;
  background: var(--abyss-700);
  border: 1px solid var(--hair);
  border-radius: 2px;
  padding: 26px 20px 20px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.card:hover { border-color: var(--neon-line); }

.card__code {
  position: absolute;
  top: -1px;
  left: -1px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--neon-400);
  background: var(--abyss-950);
  border: 1px solid var(--hair);
  border-top: 0;
  border-left: 0;
  border-radius: 0 0 2px 0;
  padding: 3px 9px;
}

.paper .card,
.section--paper .card {
  background: #FFFFFF;
  border-color: rgba(11, 20, 24, 0.16);
  color: var(--ink-900);
}

.paper .card:hover,
.section--paper .card:hover { border-color: var(--neon-600); }

/* ---------- 7. 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 4px 8px;
  border: 1px solid var(--hair);
  border-radius: 2px;
  color: var(--stone-400);
  white-space: nowrap;
}

.tag--moss {
  color: #A2C7A9;
  border-color: var(--moss-line);
  background: rgba(94, 122, 99, 0.16);
}

.tag--clay {
  color: #E9A88F;
  border-color: var(--clay-line);
  background: rgba(180, 105, 79, 0.14);
}

.tag--amber {
  color: var(--amber-400);
  border-color: var(--amber-line);
  background: rgba(232, 176, 75, 0.1);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.btn--primary {
  background: var(--neon-400);
  color: var(--abyss-950);
  font-weight: 700;
}

.btn--primary:hover { background: #58F1E7; }

.btn--ghost {
  background: transparent;
  border-color: var(--neon-line);
  color: var(--neon-400);
}

.btn--ghost:hover {
  background: rgba(53, 224, 214, 0.1);
  border-color: var(--neon-400);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--stone-400);
  padding: 18px 0;
}

.breadcrumb a {
  color: var(--stone-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.breadcrumb a:hover {
  color: var(--neon-400);
  border-bottom-color: var(--neon-line);
}

.breadcrumb__sep { color: var(--neon-600); }

/* ---------- 10. 图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--hair);
  border-radius: 2px;
  overflow: hidden;
  background: var(--abyss-900);
}

.figure__img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(0.72);
  background-color: var(--abyss-900);
  background-image:
    linear-gradient(140deg, rgba(53, 224, 214, 0.14), rgba(4, 16, 26, 0.9) 62%),
    repeating-linear-gradient(to bottom, var(--grid-line) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(to right, var(--grid-line) 0 1px, transparent 1px 26px);
}

.figure__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--stone-400);
}

.figure--tall .figure__img { aspect-ratio: 4 / 5; }
.figure--wide .figure__img { aspect-ratio: 21 / 9; }

@media (max-width: 759px) {
  .figure--wide .figure__img { aspect-ratio: 16 / 9; }
  .figure--tall .figure__img { aspect-ratio: 3 / 4; }
}

/* ---------- 11. 复制标签 ---------- */
[data-copy] { cursor: copy; }

[data-copy].is-copied {
  position: relative;
  color: #A2C7A9;
  border-color: var(--moss-line);
}

[data-copy].is-copied::after {
  content: "已复制";
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 5;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  border-radius: 2px;
  background: var(--moss-500);
  color: var(--abyss-950);
  white-space: nowrap;
}

/* ---------- 12. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 12px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 2px;
  background: var(--neon-400);
  color: var(--abyss-950);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: top 160ms var(--ease);
}

.skip-link:focus { top: 12px; }

/* ---------- 13. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-h);
  z-index: 60;
  background: var(--abyss-950);
  border-bottom: 1px solid var(--hair);
}

/* 移动端编号条 */
.topbar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  height: var(--topbar-h);
  padding: 0 14px;
}

.topbar::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--neon-400);
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left center;
  transition: transform 120ms linear;
}

.topbar__coord {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--stone-400);
}

.topbar__brand {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper-50);
  text-decoration: none;
}

.nav-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  background: transparent;
  border: 1px solid var(--hair);
  border-radius: 2px;
  color: var(--paper-50);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.nav-toggle:hover { border-color: var(--neon-line); color: var(--neon-400); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 14px;
}

.nav-toggle__bars i {
  display: block;
  height: 1px;
  width: 100%;
  background: var(--neon-400);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* 坐标轨道（仅桌面） */
.rail-coord { display: none; }

/* 索引轨道 / 移动端抽屉 */
.rail-index {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: min(66vw, 320px);
  height: calc(100vh - var(--topbar-h));
  height: calc(100dvh - var(--topbar-h));
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 18px 28px;
  overflow-y: auto;
  background: var(--abyss-900);
  border-right: 1px solid var(--hair);
  transform: translateX(-102%);
  transition: transform 300ms var(--ease);
  z-index: 2;
}

.site-header[data-open] .rail-index { transform: translateX(0); }

.nav-scrim {
  position: fixed;
  inset: var(--topbar-h) 0 0 0;
  z-index: 1;
  background: rgba(4, 16, 26, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease);
}

.site-header[data-open] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* 品牌 */
.brand {
  display: block;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair);
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--paper-50);
}

.brand__tagline {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--stone-400);
}

/* 导航 */
.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rail-nav__caption {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--stone-400);
  text-transform: uppercase;
}

.rail-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 8px;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
  color: var(--paper-50);
  font-size: 15px;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.rail-nav__code {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--stone-400);
  transition: color 160ms var(--ease);
}

.rail-nav__label { line-height: 1.4; }

.rail-nav__link:hover {
  color: var(--neon-400);
  border-left-color: var(--neon-600);
  background: rgba(53, 224, 214, 0.05);
}

.rail-nav__link[aria-current="page"] {
  color: var(--neon-400);
  border-left-color: var(--neon-400);
  background: rgba(53, 224, 214, 0.07);
}

.rail-nav__link[aria-current="page"] .rail-nav__code { color: var(--amber-400); }

/* CTA 与注释 */
.rail-cta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
}

.rail-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-size: 11px;
  line-height: 1.75;
  color: var(--stone-400);
}

/* ---------- 14. 桌面端轨道形态 ---------- */
@media (min-width: 1024px) {
  .site-header {
    right: auto;
    bottom: 0;
    height: auto;
    width: var(--shell-offset);
    display: grid;
    grid-template-columns: var(--rail-coord) var(--rail-index);
    grid-template-rows: 100%;
    border-bottom: 0;
    border-right: 1px solid var(--hair);
    background: var(--abyss-950);
  }

  .topbar { display: none; }

  .rail-coord {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 30px 0 26px;
    border-right: 1px solid var(--hair);
    background: linear-gradient(180deg, #04101A 0%, #071A2B 58%, #04101A 100%);
  }

  .rail-coord__glyph {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 0.32em;
    color: var(--paper-50);
  }

  .rail-coord__scale {
    position: relative;
    flex: 1;
    width: 12px;
    margin: 20px 0;
    opacity: 0.55;
    background-image: repeating-linear-gradient(
      to bottom,
      var(--stone-400) 0 1px,
      transparent 1px 11px
    );
  }

  .rail-coord__scale::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: var(--neon-400);
    box-shadow: 0 0 10px rgba(53, 224, 214, 0.7);
    transform-origin: top center;
    transform: scaleY(var(--scroll-progress, 0));
    transition: transform 120ms linear;
  }

  .rail-coord__meta {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 9.5px;
    font-weight: 500;
    letter-spacing: 0.24em;
    color: var(--stone-400);
  }

  .rail-index {
    position: static;
    width: auto;
    height: auto;
    min-height: 0;
    padding: 30px 22px 26px;
    gap: 22px;
    border-right: 0;
    background: linear-gradient(180deg, var(--abyss-900) 0%, var(--abyss-950) 100%);
    transform: none;
    transition: none;
    z-index: auto;
  }

  .nav-scrim { display: none; }
}

@media (max-width: 1023px) {
  main {
    margin-left: 0;
    margin-top: var(--topbar-h);
  }
}

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-left: var(--shell-offset);
  padding: 46px clamp(18px, 4vw, 56px) 20px;
  background: var(--abyss-950);
  border-top: 1px solid var(--hair);
}

@media (max-width: 1023px) {
  .site-footer { margin-left: 0; padding-top: 34px; }
}

.footer-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  max-width: 1120px;
  margin-inline: auto;
}

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 24px; }
}

.footer-brand__mark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--paper-50);
}

.footer-brand__line {
  margin: 10px 0 0;
  max-width: 32ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone-400);
}

.footer-brand__code {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--neon-600);
}

.footer-col__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--amber-400);
  text-transform: uppercase;
}

.footer-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col__list a {
  color: var(--paper-50);
  font-size: 13.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.footer-col__list a:hover {
  color: var(--neon-400);
  border-bottom-color: var(--neon-line);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  max-width: 1120px;
  margin: 34px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 12px;
  line-height: 1.75;
  color: var(--stone-400);
}

.footer-meta p { margin: 0; }

.footer-meta__contact {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.footer-meta__hours { max-width: 56ch; }

.footer-meta__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--stone-400);
}

.footer-meta__icp { color: var(--amber-400); }

/* ---------- 16. 视口显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

.js-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 降低动效 ---------- */
@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-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .rail-coord__scale::after,
  .topbar::after { transition: none; }
}