/* =========================================================
   澳门MG娱乐 · 共享样式 /assets/site.css
   夜航坐标 · 印刷规则手册 · 非对称档案网格
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink-0: #050A18;
  --ink-1: #0A1328;
  --ink-2: #121E3A;
  --gold: #C8A24A;
  --gold-bright: #E6C982;
  --rose: #FF3D7F;
  --teal: #38E0C8;
  --paper: #F4EEDF;
  --mist: #AAB4C8;
  --line: #2A3550;

  --line-soft: rgba(42, 53, 80, 0.72);
  --gold-08: rgba(200, 162, 74, 0.08);
  --gold-16: rgba(200, 162, 74, 0.16);
  --gold-32: rgba(200, 162, 74, 0.32);

  --shell: 1280px;
  --gutter: clamp(16px, 4.2vw, 56px);

  --sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --dur: 220ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-0);
  background-image:
    linear-gradient(to right, rgba(200, 162, 74, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(200, 162, 74, 0.055) 1px, transparent 1px);
  background-size: 88px 88px;
  color: var(--paper);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--paper);
}

h1 { font-size: clamp(34px, 6vw, 72px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(18px, 2.2vw, 24px); }

p { text-wrap: pretty; }

strong { font-weight: 700; color: var(--paper); }

::selection {
  background: var(--gold);
  color: var(--ink-0);
}

[id] { scroll-margin-top: clamp(96px, 14vh, 148px); }

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

/* ---------- 4. 通用容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: calc(var(--shell) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 26px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 5. 跳转与阅读进度 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--ink-0);
  border: 2px solid var(--gold-bright);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus { transform: translateY(0); }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 190;
  background: rgba(10, 19, 40, 0.92);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-bright) 68%, var(--rose) 100%);
  box-shadow: 0 0 12px rgba(200, 162, 74, 0.55);
  transition: width 90ms linear;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 160;
  background: rgba(5, 10, 24, 0.96);
  border-bottom: 2px solid var(--line);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.site-header.is-stuck {
  border-bottom-color: var(--gold);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.55);
}

.site-header__strip {
  position: relative;
  z-index: 159;
  background: var(--ink-1);
  border-bottom: 1px dashed var(--line);
}

.site-header__strip-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 8px;
}

.coord {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.coord__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(56, 224, 200, 0.16);
  animation: coord-breathe 3.6s ease-in-out infinite;
}

@keyframes coord-breathe {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.coord__text { color: var(--mist); }
.coord__text--dim { color: rgba(170, 180, 200, 0.58); }

.utility {
  display: flex;
  align-items: center;
  gap: 18px;
}

.utility__action {
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.utility__action:hover,
.utility__action:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}

.utility__hint {
  flex: 1 0 100%;
  padding-top: 2px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.utility__hint[hidden] { display: none; }

.site-header__main {
  position: relative;
  z-index: 159;
}

.site-header__main-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding-block: 14px;
}

/* 品牌坐标章 */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand__seal {
  position: relative;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(150deg, rgba(200, 162, 74, 0.22), rgba(200, 162, 74, 0) 62%),
    var(--ink-2);
  border: 2px solid var(--gold);
  box-shadow: inset 0 0 0 1px rgba(5, 10, 24, 0.9);
  transition: border-color var(--dur) var(--ease);
}

.brand__seal::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 8px;
  height: 8px;
  background: var(--rose);
}

.brand__seal-mono {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.brand__name {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__mark {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
}

.brand__tagline {
  padding-left: 14px;
  margin-left: 4px;
  border-left: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(170, 180, 200, 0.72);
  white-space: nowrap;
}

.brand:hover .brand__seal { border-color: var(--gold-bright); }

.brand--footer .brand__name { font-size: 19px; }

/* 抽屉按钮 */
.nav-toggle {
  display: none;
  justify-self: end;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  color: var(--paper);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 栏目地图（桌面横排） */
.nav {
  justify-self: end;
  display: flex;
  align-items: center;
}

.nav__head { display: none; }

.nav__list {
  display: flex;
  align-items: stretch;
}

.nav__item + .nav__item { border-left: 1px solid var(--line-soft); }

.nav__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 15px;
  border-bottom: 2px solid transparent;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--paper);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav__index {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--gold);
  opacity: 0.75;
}

.nav__text { display: inline-block; }

.nav__link:hover,
.nav__link:focus-visible {
  background: var(--gold-08);
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}

.nav__link[aria-current="page"] {
  color: var(--gold-bright);
  background: var(--gold-16);
  border-bottom-color: var(--gold);
  box-shadow: inset 0 -1px 0 var(--gold);
}

.nav__link[aria-current="page"] .nav__index {
  color: var(--gold-bright);
  opacity: 1;
}

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 156;
  background: rgba(5, 10, 24, 0.74);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}

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

/* ---------- 7. 通用组件 ---------- */
.panel {
  background: var(--ink-1);
  border: 2px solid var(--line);
  border-top: 3px solid var(--gold);
  padding: clamp(16px, 2.4vw, 28px);
}

.card {
  position: relative;
  height: 100%;
  background: var(--ink-2);
  border: 2px solid var(--line);
  padding: clamp(16px, 2.2vw, 26px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
}

.card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.card__body {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 238, 223, 0.88);
}

.card__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--gold);
}

.mono {
  font-family: var(--mono);
  font-size: 0.86em;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.rule-list { display: grid; }

.rule-list li {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.rule-list li:first-child { padding-top: 0; }
.rule-list li:last-child { border-bottom: 0; padding-bottom: 0; }

.rule-list__num {
  flex: 0 0 auto;
  min-width: 2.6em;
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-bright);
  background: var(--gold-08);
  border: 1px solid var(--gold-32);
}

.tag--rose {
  color: var(--rose);
  background: rgba(255, 61, 127, 0.08);
  border-color: rgba(255, 61, 127, 0.4);
}

.tag--teal {
  color: var(--teal);
  background: rgba(56, 224, 200, 0.08);
  border-color: rgba(56, 224, 200, 0.38);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--mist);
  background: var(--ink-1);
  border: 2px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.chip:hover {
  color: var(--paper);
  border-color: var(--gold);
}

.chip[aria-pressed="true"] {
  color: var(--ink-0);
  background: var(--gold);
  border-color: var(--gold-bright);
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 2px solid transparent;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold-bright);
  color: var(--ink-0);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
}

.btn--gold:hover {
  background: var(--gold-bright);
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.55);
}

.btn--line {
  background: transparent;
  border-color: var(--gold);
  color: var(--gold-bright);
}

.btn--line:hover {
  background: var(--gold-08);
  border-color: var(--gold-bright);
}

.prose {
  max-width: 68ch;
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(244, 238, 223, 0.9);
}

.prose p + p { margin-top: 1em; }

.prose h2,
.prose h3 {
  margin-top: 1.7em;
  margin-bottom: 0.5em;
  font-family: var(--sans);
  color: var(--paper);
}

.prose ul,
.prose ol {
  margin-top: 0.8em;
  padding-left: 1.4em;
}

.prose ul li { list-style: square; color: var(--gold); }
.prose ul li span,
.prose ul li { }
.prose ul li::marker { color: var(--gold); }
.prose ol li { list-style: decimal; }
.prose ol li::marker { color: var(--gold); font-family: var(--mono); }

.prose a {
  color: var(--gold-bright);
  border-bottom: 1px solid var(--gold-32);
}

.prose a:hover { border-bottom-color: var(--gold); }

.breadcrumbs {
  padding: 18px 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--gold);
}

.breadcrumbs a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
}

.breadcrumbs a:hover {
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}

.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* 图像容器（页面阶段放占位图） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-2);
  border: 2px solid var(--line);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed rgba(200, 162, 74, 0.26);
  pointer-events: none;
  z-index: 2;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--paper);
  background: linear-gradient(0deg, rgba(5, 10, 24, 0.92), rgba(5, 10, 24, 0));
}

.top-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 9px 14px;
  background: transparent;
  border: 2px solid var(--gold-32);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold-bright);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.top-link:hover {
  background: var(--gold-08);
  border-color: var(--gold);
}

/* 章节高亮（滚动阅读） */
[data-spy] {
  transition: box-shadow var(--dur) var(--ease);
}

[data-spy].is-current {
  box-shadow: inset 3px 0 0 var(--gold);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 9vw, 110px);
  background: var(--ink-1);
  border-top: 3px solid var(--gold);
  color: var(--paper);
}

.site-footer__strip {
  background: var(--ink-0);
  border-bottom: 1px solid var(--line);
}

.site-footer__strip-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  padding-block: 12px;
}

.site-footer__stamp {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.site-footer__main {
  padding-block: clamp(30px, 4.6vw, 56px);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr 0.85fr 1.15fr;
  gap: clamp(20px, 3vw, 44px);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.site-footer__blurb {
  max-width: 30ch;
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.site-footer__col { min-width: 0; }

.site-footer__col--wide { min-width: 0; }

.site-footer__title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.site-footer__list { display: grid; }

.site-footer__link {
  display: inline-block;
  padding: 6px 0;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--gold-bright);
  transform: translateX(3px);
}

.contact-list { display: grid; gap: 10px; }

.contact-list__row {
  display: grid;
  grid-template-columns: 5.4em 1fr;
  gap: 10px;
}

.contact-list__term {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.contact-list__value {
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.site-footer__bottom {
  background: var(--ink-0);
  border-top: 1px solid var(--line);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px 32px;
  padding-block: 18px;
}

.site-footer__legal {
  max-width: 70ch;
  font-family: var(--serif);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(170, 180, 200, 0.8);
}

.site-footer__copy {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1180px) {
  .brand__tagline { display: none; }
  .nav__link { padding: 10px 11px; font-size: 14px; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 158;
    display: block;
    width: min(380px, 88vw);
    padding: clamp(100px, 18vh, 172px) 0 44px;
    background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink-1) 58%, var(--ink-0) 100%);
    border-left: 3px solid var(--gold);
    box-shadow: -24px 0 60px rgba(0, 0, 0, 0.62);
    overflow-y: auto;
    transform: translateX(103%);
    visibility: hidden;
    transition: transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  }

  .nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--dur) var(--ease), visibility 0s linear 0s;
  }

  .nav__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 22px 14px;
    margin-bottom: 6px;
    border-bottom: 1px dashed var(--line);
  }

  .nav__label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
  }

  .nav__list { display: block; }

  .nav__item { border-top: 1px solid var(--line-soft); }

  .nav__item + .nav__item { border-left: 0; }

  .nav__item:last-child { border-bottom: 1px solid var(--line-soft); }

  .nav__link {
    justify-content: flex-start;
    gap: 14px;
    padding: 16px 22px;
    border-bottom: 0;
    border-left: 3px solid transparent;
    font-size: 17px;
  }

  .nav__link:hover,
  .nav__link:focus-visible { border-left-color: var(--gold); }

  .nav__link[aria-current="page"] {
    border-left-color: var(--rose);
    box-shadow: none;
  }

  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px) {
  .col-3, .col-4, .col-6, .col-8 { grid-column: span 6; }
}

@media (max-width: 860px) {
  .coord__text--dim { display: none; }
  .site-header__strip-inner { gap: 6px 18px; }
}

@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .site-header__main-inner { padding-block: 10px; gap: 12px; }
  .brand { gap: 10px; }
  .brand__seal { width: 40px; height: 40px; }
  .nav-toggle { padding: 8px 10px; gap: 8px; }
  .nav-toggle__label { font-size: 10px; letter-spacing: 0.1em; }
  .utility { gap: 12px; }
  .utility__action { font-size: 10px; letter-spacing: 0.1em; }
  .coord { font-size: 10px; letter-spacing: 0.1em; }
  .col-3, .col-4, .col-6, .col-8 { grid-column: span 12; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .contact-list__row { grid-template-columns: 1fr; gap: 2px; }
  .site-footer__bottom-inner { flex-direction: column; }
}

/* ---------- 10. 动效偏好与细节 ---------- */
@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;
  }

  .coord__dot { animation: none; opacity: 1; }
  .card:hover { transform: none; }
  .site-footer__link:hover { transform: none; }
  .btn--gold:hover { transform: none; }
}

::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--ink-0); }
::-webkit-scrollbar-thumb {
  background: var(--line);
  border: 3px solid var(--ink-0);
}
::-webkit-scrollbar-thumb:hover { background: var(--gold); }