/* ============================================================
   万博体育最新版 · 共享站点样式 /assets/site.css
   骨架：深空索引台（黑白高对比 + 熔金橙锚点 + 荧光青绿状态）
   ============================================================ */

:root {
  --void-navy: #050814;
  --deep-space: #0A1230;
  --panel-blue: #111D42;
  --line-blue: #24345F;
  --molten-gold: #FF8A1E;
  --amber-light: #FFC46B;
  --cyan: #2BF0C8;
  --ice-white: #F4F7FF;
  --steel-mist: #9FB0D0;
  --coral: #FF5C7A;

  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 56px);
  --header-h: 74px;
  --radius: 2px;
  --hairline: 1px solid var(--line-blue);
  --shadow-soft: 0 18px 40px -28px rgba(0, 0, 0, 0.92);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  margin: 0;
  background-color: var(--void-navy);
  background-image:
    radial-gradient(circle at 84% -8%, rgba(255, 138, 30, 0.16), transparent 46%),
    radial-gradient(circle at 2% 94%, rgba(43, 240, 200, 0.10), transparent 48%);
  background-repeat: no-repeat;
  color: var(--ice-white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

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

::selection {
  background: var(--molten-gold);
  color: var(--void-navy);
}

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

/* ---------- 排版基础 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(44px, 7vw, 112px); }
h2 { font-size: clamp(28px, 4vw, 52px); }
h3 { font-size: clamp(21px, 2.4vw, 30px); }
h4 { font-size: clamp(17px, 1.8vw, 20px); }

p { max-width: 70ch; }

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 400;
  transform: translateY(-140%);
  padding: 11px 20px;
  background: var(--molten-gold);
  color: #08122A;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  border-radius: 0 0 var(--radius) 0;
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -4px;
}

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

.shell--narrow { max-width: 820px; }

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(30px, 4vw, 56px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 32px;
  margin-bottom: clamp(24px, 3vw, 44px);
}

.section-head__index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--molten-gold);
}

.section-head__index::after {
  content: "";
  width: clamp(28px, 6vw, 72px);
  height: 1px;
  background: var(--molten-gold);
  opacity: 0.85;
}

.section-head__title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
}

.section-head__note {
  max-width: 46ch;
  color: var(--steel-mist);
  font-size: 15px;
  line-height: 1.8;
}

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

/* ---------- 栅格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

@media (min-width: 900px) {
  .grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .grid--split-rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 34%, rgba(255, 255, 255, 0.48) 50%, transparent 66%);
  transform: translateX(-130%);
  transition: transform 0.55s var(--ease);
}

.btn:hover::after,
.btn:focus-visible::after { transform: translateX(130%); }

.btn:active { transform: translateY(1px); }

.btn--gold {
  background: var(--molten-gold);
  color: #08122A;
  box-shadow: 0 10px 26px -18px rgba(255, 138, 30, 0.95);
}

.btn--gold:hover { background: var(--amber-light); }

.btn--ghost {
  background: rgba(17, 29, 66, 0.5);
  border-color: var(--line-blue);
  color: var(--ice-white);
}

.btn--ghost:hover {
  border-color: var(--molten-gold);
  color: var(--amber-light);
}

.btn--cyan {
  background: rgba(43, 240, 200, 0.1);
  border-color: rgba(43, 240, 200, 0.55);
  color: var(--cyan);
}

.btn--cyan:hover {
  background: var(--cyan);
  color: var(--void-navy);
}

.btn--sm {
  padding: 9px 15px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
}

.btn--block { width: 100%; }

/* ---------- 标签 / 等宽 / 状态 ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border: var(--hairline);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel-mist);
}

.tag--gold {
  border-color: rgba(255, 138, 30, 0.5);
  color: var(--amber-light);
}

.tag--cyan {
  border-color: rgba(43, 240, 200, 0.45);
  color: var(--cyan);
}

.status-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(43, 240, 200, 0.16);
}

.status-dot--gold {
  background: var(--molten-gold);
  box-shadow: 0 0 0 3px rgba(255, 138, 30, 0.18);
}

/* ---------- 媒体容器（页面阶段放置图片占位） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--hairline);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel-blue), var(--deep-space) 72%);
  box-shadow: var(--shadow-soft);
}

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

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

.media-frame--phone {
  aspect-ratio: 9 / 19.5;
  max-width: 260px;
  margin-inline: auto;
  border-radius: 18px;
  border-color: rgba(36, 52, 95, 0.95);
}

.media-frame__placeholder {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 16px;
  text-align: center;
  color: rgba(159, 176, 208, 0.72);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background-image:
    linear-gradient(rgba(36, 52, 95, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 52, 95, 0.5) 1px, transparent 1px);
  background-size: 26px 26px;
}

.media-frame__label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 9px;
  background: rgba(5, 8, 20, 0.8);
  border: var(--hairline);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--amber-light);
}

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel-blue);
  border: var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.panel--flat {
  background: var(--deep-space);
  box-shadow: none;
}

/* ---------- 分段标签（可键盘操作） ---------- */
.tabs { display: block; }

.tabs__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  border-bottom: var(--hairline);
  scrollbar-width: thin;
}

.tabs__tab {
  position: relative;
  flex: 0 0 auto;
  padding: 12px 16px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel-mist);
  cursor: pointer;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.tabs__tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--molten-gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.22s var(--ease);
}

.tabs__tab:hover {
  color: var(--ice-white);
  background: rgba(17, 29, 66, 0.6);
}

.tabs__tab[aria-selected="true"] {
  color: var(--ice-white);
  background: rgba(17, 29, 66, 0.88);
}

.tabs__tab[aria-selected="true"]::after { transform: scaleX(1); }

.tabs__panel {
  padding-top: clamp(18px, 2.4vw, 28px);
  animation: tabsIn 0.24s var(--ease) both;
}

.tabs__panel[hidden] { display: none; }

@keyframes tabsIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 面包屑 ---------- */
.breadcrumbs { padding-block: 14px; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--steel-mist);
}

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

.breadcrumbs__item:not(:last-child)::after {
  content: "/";
  color: var(--line-blue);
}

.breadcrumbs__link {
  color: var(--steel-mist);
  transition: color 0.2s var(--ease);
}

.breadcrumbs__link:hover { color: var(--amber-light); }

.breadcrumbs__item[aria-current="page"] { color: var(--ice-white); }

/* ---------- 显现（无 JS 时保持可见） ---------- */
[data-reveal].is-armed {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

/* ============================================================
   头部：左右分置索引栏
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 8, 20, 0.86);
  border-bottom: var(--hairline);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 40px);
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  flex: 0 0 auto;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  border: 1px solid var(--molten-gold);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.brand:hover .brand__mark {
  transform: rotate(135deg);
  border-color: var(--amber-light);
}

.brand__dot {
  display: block;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(43, 240, 200, 0.7);
}

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

.brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ice-white);
}

.brand__line {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--steel-mist);
}

.site-header__right {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-width: 0;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 30px);
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 16px);
}

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 6px;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--steel-mist);
  transition: color 0.2s var(--ease);
}

.primary-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: rgba(159, 176, 208, 0.55);
  transition: color 0.2s var(--ease);
}

.primary-nav__link::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--molten-gold);
  transform: translateY(-50%);
  transition: height 0.22s var(--ease);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible { color: var(--ice-white); }

.primary-nav__link:hover::before { height: 14px; }

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

.primary-nav__link[aria-current="page"]::before { height: 22px; }

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

.primary-nav__utility {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-left: clamp(10px, 2vw, 22px);
  border-left: var(--hairline);
}

.utility-link {
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--steel-mist);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.utility-link:hover,
.utility-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(17, 29, 66, 0.6);
  border: var(--hairline);
  border-radius: var(--radius);
  color: var(--ice-white);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--molten-gold);
  color: var(--amber-light);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.18s var(--ease);
}

.site-header[data-open] .nav-toggle {
  border-color: rgba(43, 240, 200, 0.55);
  color: var(--cyan);
}

.site-header[data-open] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--molten-gold), var(--amber-light) 45%, var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ============================================================
   页脚：三级目录底座
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  background: linear-gradient(180deg, var(--deep-space), #04060F 78%);
  border-top: var(--hairline);
  color: var(--ice-white);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--molten-gold), rgba(255, 138, 30, 0) 34%, rgba(43, 240, 200, 0.85));
}

.site-footer__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) 24px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: var(--hairline);
}

@media (min-width: 900px) {
  .site-footer__top {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr);
    align-items: start;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 36ch;
}

.footer-brand__name {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.footer-brand__dot {
  display: block;
  width: 10px;
  height: 10px;
  background: var(--molten-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 16px rgba(255, 138, 30, 0.8);
}

.footer-brand__tagline {
  color: var(--steel-mist);
  font-size: 14.5px;
  line-height: 1.8;
}

.footer-brand .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.footer-nav__col { min-width: 0; }

.footer-nav__heading {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--molten-gold);
}

.footer-nav__list { display: grid; gap: 9px; }

.footer-nav__link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: var(--steel-mist);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.footer-nav__link::before {
  content: "";
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--cyan);
  transition: width 0.2s var(--ease), margin-right 0.2s var(--ease);
}

.footer-nav__link:hover,
.footer-nav__link:focus-visible { color: var(--ice-white); }

.footer-nav__link:hover::before,
.footer-nav__link:focus-visible::before {
  width: 8px;
  margin-right: 6px;
}

.site-footer__contact {
  display: grid;
  gap: 20px;
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(255, 138, 30, 0.35);
  border-radius: var(--radius);
  background:
    linear-gradient(118deg, rgba(255, 138, 30, 0.13), rgba(43, 240, 200, 0.06) 58%, transparent 88%);
}

@media (min-width: 800px) {
  .site-footer__contact {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

.footer-contact__main { min-width: 0; }

.footer-contact__heading {
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

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

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}

.footer-contact__label {
  min-width: 44px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-mist);
}

.footer-contact__value {
  font-size: 14.5px;
  color: var(--ice-white);
  word-break: break-word;
}

.footer-contact__aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  min-width: 0;
}

.footer-contact__note {
  max-width: 42ch;
  padding-top: 14px;
  border-top: 1px dashed rgba(36, 52, 95, 0.9);
  color: var(--steel-mist);
  font-size: 12.5px;
  line-height: 1.8;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(20px, 3vw, 32px);
  padding-top: 20px;
  border-top: var(--hairline);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--steel-mist);
}

.site-footer__icp { color: var(--steel-mist); }

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.legal-link {
  color: var(--steel-mist);
  transition: color 0.2s var(--ease);
}

.legal-link:hover,
.legal-link:focus-visible { color: var(--amber-light); }

.site-footer__copy { color: rgba(159, 176, 208, 0.75); }

/* ============================================================
   响应式：≤960px 全屏目录抽屉
   ============================================================ */
@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 130;
  }

  .site-header__right { gap: 10px; }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: calc(var(--header-h) + 26px) var(--gutter) 36px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: linear-gradient(180deg, #060B1C, #0A1230 58%, #050814);
    border-bottom: 1px solid rgba(36, 52, 95, 0.9);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s linear;
  }

  .site-header[data-open] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .primary-nav__list > li { border-bottom: var(--hairline); }

  .primary-nav__link {
    width: 100%;
    padding: 15px 0 15px 18px;
    font-size: clamp(21px, 6vw, 30px);
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--ice-white);
  }

  .primary-nav__index {
    font-size: 11.5px;
    letter-spacing: 0.14em;
    color: rgba(159, 176, 208, 0.6);
  }

  .primary-nav__link::before {
    left: 0;
    top: 50%;
    width: 3px;
    height: 0;
  }

  .primary-nav__link:hover::before { height: 26px; }
  .primary-nav__link[aria-current="page"]::before { height: 52%; }

  .primary-nav__utility {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 22px;
    padding: 20px 0 0;
    border-left: 0;
    border-top: var(--hairline);
  }

  .utility-link {
    padding: 8px 0;
    border-bottom: 1px solid rgba(36, 52, 95, 0.7);
    font-size: 13px;
  }

  .primary-nav__utility .btn {
    align-self: flex-start;
    margin-top: 8px;
  }
}

@media (max-width: 560px) {
  .brand__line { display: none; }
  .brand__name { font-size: 15.5px; }
  .site-footer__bottom { justify-content: flex-start; }
}

/* ============================================================
   可访问性
   ============================================================ */
@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;
  }

  [data-reveal],
  [data-reveal].is-armed {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn::after { display: none; }
}