/* ============================================================
   皇冠现金中心 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

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

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

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

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

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

a { color: inherit; }

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --ink-900: #0A0D12;
  --ink-800: #0E1F33;
  --ink-700: #16324F;
  --ink-600: #1F4A73;
  --gold-700: #8A6A2C;
  --gold-600: #B08A3E;
  --gold-300: #D6B36A;
  --cinnabar: #C0392B;
  --cinnabar-deep: #8E2A20;
  --paper: #F5F1E8;
  --stone: #D9D2C3;
  --mist: #A8B4C4;

  --line: rgba(176, 138, 62, 0.32);
  --line-soft: rgba(217, 210, 195, 0.16);

  /* 字体 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", "Noto Sans SC", monospace;

  /* 版面 */
  --wrap: 1240px;
  --gutter: 28px;
  --radius-s: 4px;
  --radius-m: 10px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 200ms;

  --shadow-card: 0 14px 32px -18px rgba(10, 13, 18, 0.85);
  --header-band-h: 40px;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  color: var(--paper);
  background-color: var(--ink-800);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.24;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(30px, 4.4vw, 44px); line-height: 1.18; }
h2 { font-size: clamp(24px, 2.8vw, 36px); }
h3 { font-size: clamp(19px, 1.8vw, 22px); }
h4 { font-size: 18px; }

p { text-wrap: pretty; }

strong, b { font-weight: 700; }

::selection {
  background: var(--gold-600);
  color: var(--ink-900);
}

/* ---------- 4. 焦点与跳转链接 ---------- */
:focus-visible {
  outline: 2px solid var(--gold-300);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 200;
  display: inline-block;
  padding: 10px 20px;
  background: var(--gold-300);
  color: var(--ink-900);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0;
  outline-offset: 0;
}

/* ---------- 5. 容器 / 网格 / 分区 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: 72px;
}

.section--ink {
  background: var(--ink-800);
  color: var(--paper);
}

.section--deep {
  background: var(--ink-900);
  color: var(--stone);
}

.section--paper {
  background: var(--paper);
  color: var(--ink-800);
}

.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4,
.section--paper .section-title {
  color: var(--ink-800);
}

.section--paper .lede,
.section--paper .muted {
  color: var(--ink-600);
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

@media (min-width: 900px) {
  .grid { gap: 32px; }
  .grid--5-7 { grid-template-columns: 5fr 7fr; gap: 48px; }
  .grid--7-5 { grid-template-columns: 7fr 5fr; gap: 48px; }
  .grid--6-6 { grid-template-columns: 1fr 1fr; gap: 48px; }
  .grid--4-8 { grid-template-columns: 4fr 8fr; gap: 56px; }
  .section { padding-block: 96px; }
}

@media (min-width: 1200px) {
  .section { padding-block: 120px; }
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  isolation: isolate;
}

.site-header.is-compact {
  box-shadow: 0 12px 28px -20px rgba(0, 0, 0, 0.95);
}

/* 6.1 顶层品牌说明带 */
.header-band {
  height: var(--header-band-h);
  overflow: hidden;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
  transition: height 220ms var(--ease), opacity 180ms var(--ease);
}

.site-header.is-compact .header-band {
  height: 0;
  opacity: 0;
}

.header-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--wrap);
  height: var(--header-band-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.header-band__motto {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-size: 13px;
  line-height: 1.4;
}

.header-band__seal {
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--gold-600);
  transform: rotate(45deg);
}

.header-band__sign {
  flex: none;
  color: var(--gold-300);
  font-weight: 500;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.header-band__rule {
  flex: none;
  width: 1px;
  height: 12px;
  background: rgba(217, 210, 195, 0.28);
}

.header-band__text {
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-band__meta {
  display: flex;
  flex: none;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.header-band__meta-item { white-space: nowrap; }

.header-band__meta-item + .header-band__meta-item {
  position: relative;
  padding-left: 20px;
}

.header-band__meta-item + .header-band__meta-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1px;
  height: 11px;
  margin-top: -5.5px;
  background: rgba(217, 210, 195, 0.24);
}

/* 6.2 主索引带 */
.header-index {
  position: relative;
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.header-index__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 14px var(--gutter);
  transition: padding 220ms var(--ease);
}

.site-header.is-compact .header-index__inner {
  padding-block: 9px;
}

/* 6.3 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  text-decoration: none;
  color: var(--paper);
  flex: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  color: var(--gold-300);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(176, 138, 62, 0.08);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  border-color: var(--gold-600);
  background: rgba(176, 138, 62, 0.18);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__sub {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold-600);
  white-space: nowrap;
}

/* 6.4 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  flex: none;
  cursor: pointer;
  color: var(--stone);
  background: rgba(245, 241, 232, 0.05);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--gold-600);
  background: rgba(176, 138, 62, 0.14);
}

.nav-toggle__bars {
  display: block;
  width: 18px;
  flex: none;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: var(--gold-300);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.nav-toggle__label {
  font-size: 14px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* 6.5 导航 */
.primary-nav {
  flex: none;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.primary-nav__item { position: relative; }

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 12px;
  font-size: 15px;
  color: var(--stone);
  text-decoration: none;
  border-radius: var(--radius-s);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--gold-600);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.primary-nav__link:hover {
  color: var(--gold-300);
  background: rgba(31, 74, 115, 0.55);
}

.primary-nav__link:hover::after {
  transform: scaleX(1);
}

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

.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold-300);
}

/* 6.6 头部行动按钮 */
.header-index__cta {
  flex: none;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-900);
  color: var(--stone);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(217, 210, 195, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 210, 195, 0.035) 1px, transparent 1px);
  background-size: 34px 34px;
}

.site-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 56px var(--gutter) 0;
}

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

.brand--footer {
  margin-right: 0;
  color: var(--stone);
}

.brand--footer .brand__name { color: var(--paper); }

.brand--footer .brand__mark { color: var(--gold-300); }

.site-footer__note {
  margin-top: 18px;
  max-width: 36ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.site-footer__stamp { margin-top: 18px; }

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 32px 24px;
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--gold-600);
  text-transform: uppercase;
}

.footer-col__list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.footer-col__link {
  display: inline-block;
  font-size: 15px;
  line-height: 1.6;
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-col__link:hover,
.footer-col__link:focus-visible {
  color: var(--gold-300);
  border-bottom-color: rgba(214, 179, 106, 0.6);
}

.site-footer__contact {
  padding-top: 32px;
  border-top: 1px solid var(--line-soft);
}

.site-footer__contact-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--gold-600);
  text-transform: uppercase;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

@media (min-width: 720px) {
  .contact-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 40px; }
}

.contact-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 15px;
  line-height: 1.6;
}

.contact-list__label {
  flex: none;
  min-width: 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.contact-list__value {
  color: var(--gold-300);
  font-weight: 500;
  word-break: break-word;
}

.site-footer__legal {
  position: relative;
  margin-top: 44px;
  border-top: 1px solid var(--line-soft);
  background: rgba(0, 0, 0, 0.35);
}

.site-footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 18px var(--gutter);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.site-footer__copy { margin: 0; }
.site-footer__icp { margin: 0; color: var(--stone); }

@media (min-width: 860px) {
  .site-footer__inner {
    grid-template-columns: minmax(240px, 1fr) minmax(0, 1.9fr);
    gap: 52px 64px;
    padding-top: 72px;
  }
  .site-footer__contact {
    grid-column: 1 / -1;
    padding-top: 36px;
  }
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn--cta {
  color: var(--paper);
  background: var(--cinnabar);
  border-color: var(--cinnabar-deep);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.22);
}

.btn--cta:hover,
.btn--cta:focus-visible {
  background: var(--cinnabar-deep);
  border-color: var(--cinnabar-deep);
  color: #FFFFFF;
}

.btn--cta:active { background: #7A231A; }

.btn--ghost {
  color: var(--gold-300);
  background: transparent;
  border-color: rgba(176, 138, 62, 0.6);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(176, 138, 62, 0.16);
  border-color: var(--gold-300);
  color: var(--gold-300);
}

.btn--quiet {
  color: var(--stone);
  background: rgba(245, 241, 232, 0.06);
  border-color: var(--line-soft);
}

.btn--quiet:hover,
.btn--quiet:focus-visible {
  color: var(--paper);
  background: rgba(245, 241, 232, 0.12);
  border-color: var(--gold-600);
}

/* ---------- 9. 通用组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-300);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  flex: none;
  background: var(--gold-600);
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.24;
  letter-spacing: 0.02em;
}

.lede {
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 900px) {
  .lede { font-size: 19px; }
}

.muted { color: var(--mist); }

.prose {
  max-width: 68ch;
}

.prose > * + * { margin-top: 1.1em; }

.prose p {
  font-size: 17px;
  line-height: 1.75;
}

.prose h2,
.prose h3 { margin-top: 1.8em; }

.breadcrumbs {
  font-size: 13px;
  color: var(--mist);
}

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

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__link {
  color: var(--gold-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  border-bottom-color: currentColor;
}

.breadcrumbs__sep {
  color: var(--gold-700);
  font-family: var(--font-mono);
}

.breadcrumbs__current { color: var(--stone); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-300);
  background: rgba(176, 138, 62, 0.1);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.num {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 2.2em;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold-600);
  font-variant-numeric: tabular-nums;
}

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--gold-600), rgba(176, 138, 62, 0));
}

.card {
  position: relative;
  padding: 26px;
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.card:hover,
.card:focus-within {
  border-color: var(--gold-600);
  background: var(--ink-600);
  box-shadow: var(--shadow-card);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.card__body {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.section--paper .card {
  background: #FFFFFF;
  border-color: var(--stone);
}

.section--paper .card:hover,
.section--paper .card:focus-within {
  background: #FFFFFF;
  border-color: var(--gold-600);
}

.section--paper .card__title { color: var(--ink-800); }
.section--paper .card__body { color: var(--ink-600); }

/* 图片容器基础规则（页面阶段放置 <img> 或内联 SVG） */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 90% at 15% 0%, rgba(31, 74, 115, 0.9), transparent 60%),
    linear-gradient(180deg, var(--ink-700), var(--ink-800));
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(217, 210, 195, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 210, 195, 0.06) 1px, transparent 1px);
  background-size: 26px 26px;
}

.media-frame > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.section--paper .media-frame {
  border-color: var(--stone);
  background:
    radial-gradient(120% 90% at 15% 0%, rgba(217, 210, 195, 0.9), transparent 62%),
    linear-gradient(180deg, #FFFFFF, var(--paper));
}

.section--paper .media-frame::after {
  background-image:
    linear-gradient(rgba(14, 31, 51, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 31, 51, 0.07) 1px, transparent 1px);
}

.section--paper .media-frame__caption { color: var(--ink-600); }

/* ---------- 10. 滚动进度与显现 ---------- */
.read-progress {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  z-index: 90;
  pointer-events: none;
  background: rgba(10, 13, 18, 0.5);
}

.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold-600) 0%, var(--gold-300) 58%, var(--cinnabar) 100%);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

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

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .primary-nav__link { padding-inline: 9px; font-size: 14px; }
  .primary-nav__link::after { left: 9px; right: 9px; }
  .header-index__inner { gap: 12px; }
}

@media (max-width: 1000px) {
  .header-band__meta { display: none; }

  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    padding: 10px var(--gutter) 20px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    background: var(--ink-900);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 46px -22px rgba(0, 0, 0, 0.95);
  }

  .primary-nav[data-open="true"] { display: block; }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 12px;
    font-size: 16px;
    border-radius: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .primary-nav__link::after { display: none; }

  .primary-nav__link[aria-current="page"] {
    color: var(--gold-300);
    background: rgba(31, 74, 115, 0.4);
    box-shadow: inset 3px 0 0 var(--gold-600);
  }

  .header-index__cta { padding: 9px 14px; font-size: 14px; }
}

@media (max-width: 860px) {
  .brand__sub { display: none; }
  .brand__mark { width: 34px; height: 34px; }
  .brand__name { font-size: 17px; }
}

@media (max-width: 560px) {
  :root { --gutter: 20px; }

  .header-band__text { display: none; }
  .header-band__rule { display: none; }

  .nav-toggle { padding: 9px 11px; }
  .nav-toggle__label { display: none; }

  .header-index__inner { gap: 10px; }

  .site-footer__inner { padding-top: 48px; }
  .site-footer__legal-inner { font-size: 11px; }
  .contact-list__label { min-width: 66px; }
}

/* ---------- 12. 动效降级 ---------- */
@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;
    scroll-behavior: auto !important;
  }

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