/* ==========================================================================
   AK体育 · Site Kit 共享样式 /assets/site.css
   高原竞技场语言：夜空深蓝底、切角面板、斜线轨迹、经幡五色标记
   ========================================================================== */

/* ---------- 0. 变量 ---------- */
:root {
  color-scheme: dark;

  --ink-900: #081827;
  --ink-800: #0E2439;
  --ink-700: #173B5C;
  --line: #26445F;

  --accent: #F05A28;
  --accent-soft: #FF8A5C;

  --flag-blue: #2D7FBF;
  --flag-white: #F4F7FA;
  --flag-red: #D6402C;
  --flag-green: #2F8F5B;
  --flag-yellow: #E8B23A;

  --text: #F4F7FA;
  --text-2: #A9B8C7;
  --text-3: #71879C;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --nav-h: 66px;
  --cut: 18px;

  --dur: 200ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --shadow: 0 24px 48px -32px rgba(0, 0, 0, 0.95);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 6% -10%, rgba(45, 127, 191, 0.20), transparent 62%),
    radial-gradient(860px 480px at 98% 0%, rgba(240, 90, 40, 0.13), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--text);
}

p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
img, svg, picture, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; height: 1px; background: var(--line); margin: 0; }

::selection { background: rgba(240, 90, 40, 0.35); color: var(--text); }

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 2. 跳到主要内容 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 400;
  display: inline-block;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #0B1420;
  background: var(--accent);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 3. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.45fr); }

@media (max-width: 900px) {
  .grid--2, .grid--3, .grid--split { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 4. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0.62em 1.35em;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--text);
  background: var(--btn-bg);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  --btn-bg: var(--accent);
  border-color: var(--accent);
  color: #10161F;
  font-weight: 700;
}
.btn--primary:hover { --btn-bg: var(--accent-soft); border-color: var(--accent-soft); }

.btn--ghost {
  --btn-bg: rgba(23, 59, 92, 0.5);
  border-color: var(--line);
  color: var(--text);
}
.btn--ghost:hover { --btn-bg: rgba(23, 59, 92, 0.85); border-color: #36607F; }

.btn--quiet {
  --btn-bg: transparent;
  border-color: transparent;
  color: var(--accent-soft);
  padding-inline: 0.2em;
  clip-path: none;
}
.btn--quiet:hover { color: var(--accent); }

/* ---------- 5. 页头：双层信息导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(8, 24, 39, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* 上层：品牌说明带 */
.utility-bar {
  max-height: 56px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(23, 59, 92, 0.95) 0%, rgba(14, 36, 57, 0.72) 55%, rgba(8, 24, 39, 0.6) 100%);
  border-bottom: 1px solid var(--line);
  transition: max-height 240ms var(--ease), opacity 200ms var(--ease), border-color 200ms var(--ease);
}

.site-header[data-condensed="true"] .utility-bar {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

.utility-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 40px;
  padding-block: 3px;
}

.utility-bar__note {
  display: flex;
  align-items: center;
  gap: 0.7em;
  min-width: 0;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-pin {
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--accent);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(240, 90, 40, 0.18);
}

.utility-bar__tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.lang-chip {
  display: inline-block;
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.utility-bar__contact {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-soft);
  border-bottom: 1px solid rgba(255, 138, 92, 0.42);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.utility-bar__contact:hover { color: var(--text); border-bottom-color: var(--text); }

/* 下层：主栏目带 */
.nav-bar__inner {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: clamp(12px, 2vw, 30px);
  min-height: var(--nav-h);
  transition: min-height 200ms var(--ease);
}

.site-header[data-condensed="true"] .nav-bar__inner { min-height: 56px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: none;
  background: linear-gradient(140deg, var(--accent) 0%, var(--flag-red) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 45%, rgba(8, 24, 39, 0.85) 45% 55%, transparent 55%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--text);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 14px;
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text);
  background: rgba(23, 59, 92, 0.55);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(23, 59, 92, 0.9); border-color: #36607F; }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 180ms var(--ease), opacity 140ms var(--ease);
}
.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); }

/* 主导航 */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 22px);
  flex: 1 1 auto;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 18px);
  margin-inline: auto;
}

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 2px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-2);
  white-space: nowrap;
  transition: color 160ms var(--ease);
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms var(--ease);
}
.primary-nav__link:hover { color: var(--text); }
.primary-nav__link:hover::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-bar__cta { flex: none; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(14, 36, 57, 0.62) 0%, rgba(8, 24, 39, 0.99) 46%, #061320 100%);
}

.flag-strip {
  display: flex;
  height: 4px;
  width: 100%;
}
.flag-strip span { flex: 1 1 0; height: 100%; }
.flag-strip span:nth-child(1) { background: var(--flag-blue); }
.flag-strip span:nth-child(2) { background: var(--flag-white); }
.flag-strip span:nth-child(3) { background: var(--flag-red); }
.flag-strip span:nth-child(4) { background: var(--flag-green); }
.flag-strip span:nth-child(5) { background: var(--flag-yellow); }

.footer__grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.5fr) repeat(3, minmax(110px, 0.75fr));
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(34px, 5vw, 66px);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 34ch;
}

.footer__mark {
  position: relative;
  width: 30px;
  height: 30px;
  margin-bottom: 4px;
  background: linear-gradient(140deg, var(--accent) 0%, var(--flag-red) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}
.footer__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 45%, rgba(8, 24, 39, 0.85) 45% 55%, transparent 55%);
}

.footer__title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.footer__tagline {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent-soft);
}

.footer__desc {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-3);
}

.footer__group { min-width: 0; }

.footer__group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--text-2);
}
.footer__group-title::before {
  content: "";
  width: 14px;
  height: 2px;
  flex: none;
  background: var(--accent);
}

.footer__links { display: grid; gap: 9px; }

.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--text-2);
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}
.footer__link:hover { color: var(--text); transform: translateX(3px); }

.footer__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 34px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.footer__contact-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.footer__label {
  font-family: var(--font-body);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-3);
  flex: none;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px 32px;
  padding-block: 22px 38px;
}

.footer__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-3);
}

.footer__note {
  max-width: 52ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs {
  padding-block: clamp(14px, 2vw, 22px);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-3);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li::after {
  content: "/";
  color: var(--line);
}
.breadcrumbs li:last-child::after { content: none; }
.breadcrumbs a {
  color: var(--text-2);
  transition: color 160ms var(--ease);
}
.breadcrumbs a:hover { color: var(--accent-soft); }
.breadcrumbs [aria-current="page"] { color: var(--text); font-weight: 600; }

/* ---------- 8. 面板 / 标签 / 数字 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  background: linear-gradient(160deg, var(--ink-800) 0%, rgba(14, 36, 57, 0.62) 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.panel--cut {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.09em;
  line-height: 1.5;
  color: var(--text-2);
  background: rgba(23, 59, 92, 0.85);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}
.tag--blue { background: var(--flag-blue); color: #FFFFFF; }
.tag--red { background: var(--flag-red); color: #FFFFFF; }
.tag--green { background: var(--flag-green); color: #FFFFFF; }
.tag--yellow { background: var(--flag-yellow); color: #241A05; }
.tag--orange { background: var(--accent); color: #10161F; }
.tag--ghost { background: transparent; border: 1px solid var(--line); color: var(--text-2); }

.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
  line-height: 1;
}

/* ---------- 9. 媒体容器（供页面阶段放置图位） ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: var(--media-ar, 16 / 10);
  width: 100%;
  background-color: var(--ink-800);
  background-image:
    repeating-linear-gradient(115deg, rgba(45, 127, 191, 0.14) 0 2px, transparent 2px 26px),
    linear-gradient(150deg, var(--ink-700) 0%, var(--ink-900) 72%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}
.media > img,
.media > svg,
.media > picture,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-2);
  background: rgba(8, 24, 39, 0.85);
  border-left: 2px solid var(--accent);
}

/* ---------- 10. 联赛切换轨道 ---------- */
.league-rail {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.league-rail__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px 10px 12px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-2);
  background: rgba(23, 59, 92, 0.32);
  border-left: 2px solid transparent;
  transition: background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}
.league-rail__item:hover {
  background: rgba(23, 59, 92, 0.68);
  color: var(--text);
}
.league-rail__item[aria-current="true"],
.league-rail__item[aria-pressed="true"] {
  background: rgba(240, 90, 40, 0.14);
  border-left-color: var(--accent);
  color: var(--text);
  font-weight: 600;
}

@media (max-width: 860px) {
  .league-rail {
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--ink-700) transparent;
  }
  .league-rail__item {
    flex: 0 0 auto;
    border-left: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }
  .league-rail__item[aria-current="true"],
  .league-rail__item[aria-pressed="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--accent);
  }
}

/* ---------- 11. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 7px 14px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-2);
  background: rgba(14, 36, 57, 0.7);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: color 160ms var(--ease), background-color 160ms var(--ease), border-color 160ms var(--ease);
}
.filter-btn:hover { color: var(--text); border-color: #36607F; }
.filter-btn[aria-pressed="true"] {
  color: #10161F;
  background: var(--accent);
  border-color: var(--accent);
}

[data-filter-item] {
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
[data-filter-item][data-filtered="out"] {
  display: none;
}

/* ---------- 12. 渐进显现 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}
.js-ready [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 长文排版 ---------- */
.prose {
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: #CFDBE6;
}
.prose > * + * { margin-top: 1.05em; }
.prose h2 {
  margin-top: 1.8em;
  font-size: clamp(24px, 2.6vw, 32px);
}
.prose h3 {
  margin-top: 1.5em;
  font-size: clamp(19px, 2vw, 23px);
}
.prose strong { color: var(--text); font-weight: 700; }
.prose a {
  color: var(--accent-soft);
  border-bottom: 1px solid rgba(255, 138, 92, 0.45);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.prose a:hover { color: var(--text); border-bottom-color: var(--text); }
.prose ul { display: grid; gap: 0.55em; }
.prose ul li { position: relative; padding-left: 1.35em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--accent);
}
.prose blockquote {
  margin: 1.4em 0;
  padding: 0.9em 1.2em;
  border-left: 2px solid var(--accent);
  background: rgba(23, 59, 92, 0.42);
  color: var(--text-2);
}

/* ---------- 14. 页面顶部标题带（可选） ---------- */
.page-head {
  padding-block: clamp(26px, 4vw, 52px) clamp(18px, 2.6vw, 32px);
  border-bottom: 1px solid var(--line);
}

/* ---------- 15. 响应式：页头 / 页脚 ---------- */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .nav-bar__inner {
    flex-wrap: wrap;
    padding-block: 10px;
    gap: 12px;
  }

  .primary-nav {
    display: none;
    flex: 1 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    order: 5;
    margin-top: 6px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }

  .primary-nav[data-open="true"] {
    display: flex;
    animation: navReveal 180ms var(--ease) both;
  }

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

  .primary-nav__link {
    display: block;
    padding: 13px 4px;
    font-size: 15px;
    border-bottom: 1px solid rgba(38, 68, 95, 0.55);
  }
  .primary-nav__link::after { display: none; }
  .primary-nav__link[aria-current="page"] {
    color: var(--accent-soft);
    border-left: 2px solid var(--accent);
    padding-left: 12px;
  }

  .nav-bar__cta {
    width: 100%;
    margin: 14px 0 4px;
  }
}

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

@media (max-width: 820px) {
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer__brand { grid-column: 1 / -1; max-width: none; }
}

@media (max-width: 640px) {
  .utility-bar__note { display: none; }
  .utility-bar__inner { justify-content: flex-end; }
  .footer__contact { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer__bottom { flex-direction: column; }
}

@media (max-width: 520px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .brand__sub { display: none; }
}

/* ---------- 16. 减少动效 ---------- */
@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-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }
}