/* ==========================================================================
   E星体育主站 · /assets/site.css
   共享外壳：刊头导航、页脚、排版基线、通用组件与图片容器
   ========================================================================== */

/* 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, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
:target { scroll-margin-top: 24px; }

/* 2. 变量 ----------------------------------------------------------------- */
:root {
  --c-green-900: #123328;
  --c-green-800: #1F4D3A;
  --c-green-700: #2A5F48;
  --c-green-500: #4F8A5B;
  --c-mist: #DDE8D8;
  --c-sand: #C9A45C;
  --c-night: #16243D;
  --c-red: #C4473D;
  --c-fog: #F4F1E8;
  --c-ink: #0B1511;

  --surface-deep: var(--c-green-900);
  --surface-base: var(--c-green-800);
  --surface-light: var(--c-mist);
  --surface-night: var(--c-night);

  --text-on-dark: var(--c-fog);
  --text-muted: rgba(244, 241, 232, 0.66);
  --text-on-light: var(--c-ink);

  --line-strong: rgba(244, 241, 232, 0.28);
  --line-soft: rgba(244, 241, 232, 0.14);
  --line-ink: rgba(11, 21, 17, 0.18);

  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --fs-ann: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-h4: 1.5rem;
  --fs-h3: clamp(1.55rem, 3.2vw, 2rem);
  --fs-h2: clamp(1.85rem, 4.4vw, 2.5rem);
  --fs-h1: clamp(2.4rem, 7vw, 4.5rem);

  --shell: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 200ms;
}

/* 3. 基线 ----------------------------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  font-weight: 400;
  color: var(--text-on-dark);
  background-color: var(--surface-base);
  background-image:
    repeating-linear-gradient(0deg, rgba(244, 241, 232, 0.04) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.04) 0 1px, transparent 1px 96px);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); font-weight: 800; }

strong { font-weight: 700; }
small { font-size: var(--fs-sm); }

#main-content { display: block; }

:focus-visible {
  outline: 2px solid var(--c-sand);
  outline-offset: 3px;
}

/* 4. 布局容器 ------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line-soft);
  margin-block: clamp(28px, 4vw, 48px);
}

/* 5. 跳至主内容 ----------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 200;
  transform: translate(-50%, -160%);
  background: var(--c-sand);
  color: var(--c-ink);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 10px 20px;
  text-decoration: none;
  transition: transform 180ms var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* 6. 滚动进度 ------------------------------------------------------------- */
.read-progress {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: 2px;
  z-index: 130;
  pointer-events: none;
  background: rgba(11, 21, 17, 0.35);
}
.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-green-500) 0%, var(--c-sand) 62%, var(--c-red) 100%);
  transition: transform 120ms linear;
}

/* 7. 页头：坐标带 --------------------------------------------------------- */
.site-header {
  position: relative;
  background-color: var(--surface-deep);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.05) 0 1px, transparent 1px 64px);
  color: var(--text-on-dark);
  border-bottom: 1px solid var(--line-strong);
}

.header-strip {
  background: var(--surface-night);
  border-bottom: 1px solid rgba(244, 241, 232, 0.12);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(244, 241, 232, 0.68);
}
.header-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  padding-block: 5px;
}
.header-strip__coord,
.header-strip__edition,
.header-strip__status {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.header-strip__edition { color: var(--c-sand); }
.header-strip__status { color: rgba(244, 241, 232, 0.8); }

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  background: var(--c-green-500);
  box-shadow: 0 0 0 3px rgba(79, 138, 91, 0.22);
}

/* 8. 页头：居中刊头 ------------------------------------------------------- */
.masthead {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 10px;
  text-align: center;
  padding-block: clamp(20px, 3.2vw, 34px) clamp(16px, 2.4vw, 26px);
}
.masthead::before,
.masthead::after {
  content: "";
  position: absolute;
  top: 50%;
  width: clamp(40px, 10vw, 150px);
  height: 1px;
  pointer-events: none;
}
.masthead::before {
  left: var(--gutter);
  background: linear-gradient(90deg, rgba(201, 164, 92, 0), rgba(201, 164, 92, 0.55));
}
.masthead::after {
  right: var(--gutter);
  background: linear-gradient(270deg, rgba(201, 164, 92, 0), rgba(201, 164, 92, 0.55));
}

.masthead__line {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--c-sand);
}

.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 16px);
  text-decoration: none;
  color: var(--text-on-dark);
}
.masthead__mark {
  display: inline-grid;
  place-items: center;
  width: clamp(38px, 5vw, 50px);
  height: clamp(38px, 5vw, 50px);
  border: 1px solid var(--c-sand);
  color: var(--c-sand);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1;
}
.masthead__text {
  display: grid;
  gap: 5px;
  text-align: left;
}
.masthead__name {
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1;
}
.masthead__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--text-muted);
}

.masthead__meta {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.masthead__brand:hover .masthead__name { color: var(--c-sand); }
.masthead__brand { transition: color var(--dur) var(--ease); }

/* 9. 页头：栏目索引 ------------------------------------------------------- */
.nav-bar {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(11, 21, 17, 0.22), rgba(11, 21, 17, 0));
}
.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding-block: 6px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(10px, 2.2vw, 30px);
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 13px 2px;
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  color: rgba(244, 241, 232, 0.78);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 7px;
  height: 1px;
  background: var(--c-sand);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 220ms var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--c-fog); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] {
  color: var(--c-fog);
  font-weight: 600;
}

.nav-bar__cta {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  color: var(--c-fog);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover,
.nav-toggle:focus-visible { border-color: var(--c-sand); color: var(--c-sand); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  background-image: linear-gradient(var(--c-sand), var(--c-sand));
  background-size: 100% 1px;
  background-position: 0 0;
  background-repeat: no-repeat;
  box-shadow: 0 4px 0 0 var(--c-sand), 0 8px 0 0 var(--c-sand);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background-size: 0 0;
  box-shadow: 0 -4px 0 0 var(--c-sand), 0 4px 0 0 var(--c-sand);
}
.nav-toggle__label { white-space: nowrap; }

/* 10. 按钮 ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.3;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn--sm { padding: 8px 13px; font-size: 12px; letter-spacing: 0.12em; }

.btn--solid {
  background: var(--c-green-500);
  border-color: var(--c-green-500);
  color: var(--c-ink);
}
.btn--solid:hover,
.btn--solid:focus-visible {
  background: var(--c-sand);
  border-color: var(--c-sand);
  color: var(--c-ink);
}

.btn--outline {
  border-color: var(--line-strong);
  color: var(--c-fog);
  background: transparent;
}
.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--c-sand);
  color: var(--c-sand);
}

.btn--line {
  border-color: rgba(201, 164, 92, 0.55);
  color: var(--c-sand);
  background: transparent;
}
.btn--line:hover,
.btn--line:focus-visible {
  border-color: var(--c-sand);
  background: rgba(201, 164, 92, 0.14);
  color: var(--c-fog);
}

.btn--sand {
  background: var(--c-sand);
  border-color: var(--c-sand);
  color: var(--c-ink);
}
.btn--sand:hover,
.btn--sand:focus-visible {
  background: var(--c-fog);
  border-color: var(--c-fog);
  color: var(--c-ink);
}

/* 11. 通用排版组件 -------------------------------------------------------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-sand);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--c-sand);
  white-space: nowrap;
}

.section {
  position: relative;
  padding-block: clamp(40px, 6vw, 80px);
}
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(20px, 3vw, 32px);
}
.section__title {
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.12;
}

.panel {
  position: relative;
  background: var(--c-green-800);
  border: 1px solid var(--line-strong);
}
.panel--light {
  background: var(--c-mist);
  border-color: var(--line-ink);
  color: var(--c-ink);
}
.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-sand);
}
.panel--light .panel__head {
  border-bottom-color: var(--line-ink);
  color: rgba(11, 21, 17, 0.62);
}

.prose { max-width: 68ch; }
.prose p {
  margin-bottom: 1em;
  color: rgba(244, 241, 232, 0.84);
}
.prose p:last-child { margin-bottom: 0; }
.prose h2, .prose h3 { margin-block: 1.5em 0.6em; }
.prose--light p { color: rgba(11, 21, 17, 0.84); }

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--c-sand);
}
.breadcrumb__link {
  color: rgba(244, 241, 232, 0.72);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible { color: var(--c-sand); }
.breadcrumb__current { color: var(--c-fog); }

.data-table {
  width: 100%;
  font-size: var(--fs-sm);
  font-variant-numeric: tabular-nums;
}
.data-table th,
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}
.data-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-sand);
  border-bottom-color: var(--line-strong);
}
.data-table tbody tr { transition: background-color var(--dur) var(--ease); }
.data-table tbody tr:hover { background: rgba(244, 241, 232, 0.06); }
.data-table .is-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

/* 12. 图片容器 ------------------------------------------------------------ */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--c-green-900);
  border: 1px solid var(--line-strong);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 48px);
}
.media-frame > img,
.media-frame > picture > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--map {
  aspect-ratio: 21 / 9;
  background-image:
    repeating-radial-gradient(circle at 22% 118%, rgba(201, 164, 92, 0.3) 0 1px, rgba(201, 164, 92, 0) 1px 22px),
    repeating-radial-gradient(circle at 84% -14%, rgba(79, 138, 91, 0.38) 0 1px, rgba(79, 138, 91, 0) 1px 18px),
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(244, 241, 232, 0.07) 0 1px, transparent 1px 64px);
}
.media-frame__caption {
  position: absolute;
  z-index: 2;
  left: 12px;
  bottom: 10px;
  padding: 4px 8px;
  background: rgba(11, 21, 17, 0.62);
  color: var(--c-fog);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* 13. 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background-color: var(--surface-deep);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.045) 0 1px, transparent 1px 72px);
  color: var(--text-on-dark);
  border-top: 1px solid var(--line-strong);
}
.site-footer::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-sand) 55%, var(--c-night));
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(24px, 3.5vw, 48px);
  padding-block: clamp(36px, 5.5vw, 68px);
}

.footer__brand { min-width: 0; }
.footer__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--c-fog);
}
.footer__brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--c-sand);
  color: var(--c-sand);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
}
.footer__brand-name {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}
.footer__summary {
  margin-top: 14px;
  max-width: 34ch;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(244, 241, 232, 0.72);
}
.footer__coord {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(201, 164, 92, 0.82);
}

.footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-sand);
}
.footer__list { display: grid; gap: 10px; }

.footer__link {
  display: inline-block;
  font-size: var(--fs-sm);
  color: rgba(244, 241, 232, 0.76);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible {
  color: var(--c-sand);
  border-bottom-color: rgba(201, 164, 92, 0.6);
}

.footer__contact-list { display: grid; gap: 2px; }
.footer__contact-item {
  display: grid;
  grid-template-columns: 5.5em 1fr;
  gap: 4px 10px;
  padding-block: 7px;
  border-bottom: 1px dashed rgba(244, 241, 232, 0.14);
  font-size: 13px;
  line-height: 1.55;
}
.footer__contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(201, 164, 92, 0.9);
}
.footer__contact-value {
  color: rgba(244, 241, 232, 0.86);
  overflow-wrap: anywhere;
}

.footer__legal {
  background: var(--surface-night);
  border-top: 1px solid rgba(244, 241, 232, 0.12);
}
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 232, 0.66);
}
.footer__copy,
.footer__icp { margin: 0; }

/* 14. 返回顶部 ------------------------------------------------------------ */
.to-top-wrap {
  position: fixed;
  right: clamp(12px, 2.4vw, 28px);
  bottom: clamp(12px, 2.4vw, 28px);
  z-index: 110;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms var(--ease), visibility 200ms var(--ease);
}
.to-top-wrap[data-visible="true"] {
  opacity: 1;
  visibility: visible;
}
.to-top {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  background: var(--c-night);
  border: 1px solid rgba(201, 164, 92, 0.55);
  color: var(--c-fog);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.to-top:hover,
.to-top:focus-visible {
  border-color: var(--c-sand);
  color: var(--c-sand);
  background: rgba(22, 36, 61, 0.92);
}
.to-top__arrow { color: var(--c-sand); font-size: 13px; line-height: 1; }

/* 15. 显现 --------------------------------------------------------------- */
[data-reveal] { opacity: 1; }
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}
html[data-js="on"] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* 16. 平板 --------------------------------------------------------------- */
@media (max-width: 980px) {
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }

  .masthead::before,
  .masthead::after { display: none; }

  .nav-bar__inner {
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    padding-block: 10px;
  }
  .nav-toggle { display: inline-flex; order: 1; }
  .nav-bar__cta {
    position: static;
    transform: none;
    order: 2;
    margin-left: auto;
  }
  .site-nav {
    order: 3;
    flex: 1 0 100%;
    display: none;
    border-top: 1px solid var(--line-soft);
    margin-top: 8px;
    padding-top: 6px;
  }
  .site-header[data-open] .site-nav { display: block; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__item { width: 100%; }
  .site-nav__link {
    display: block;
    padding: 13px 2px;
    font-size: 15px;
    border-bottom: 1px solid var(--line-soft);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] {
    color: var(--c-sand);
    border-left: 2px solid var(--c-sand);
    padding-left: 10px;
  }

  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

/* 17. 手机 --------------------------------------------------------------- */
@media (max-width: 640px) {
  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .header-strip__inner {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 4px 14px;
    font-size: 10px;
    letter-spacing: 0.1em;
    padding-block: 8px;
  }
  .header-strip__status { display: none; }

  .masthead { gap: 8px; }
  .masthead__meta { font-size: 11px; letter-spacing: 0.08em; text-align: center; }
  .masthead__brand { gap: 10px; }
  .masthead__text { gap: 4px; }

  .nav-bar__cta { font-size: 11px; padding: 7px 10px; letter-spacing: 0.08em; }

  .footer__top {
    grid-template-columns: 1fr;
    gap: 26px;
    padding-block: 32px;
  }
  .footer__contact-item { grid-template-columns: 4.5em 1fr; }
  .footer__legal-inner {
    justify-content: flex-start;
    font-size: 11px;
  }

  .to-top { padding: 8px 11px; font-size: 10px; }
}

/* 18. 减少动效与可访问性 -------------------------------------------------- */
@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;
  }
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .read-progress__bar { transition: none; }
}

@media print {
  .read-progress,
  .to-top-wrap,
  .nav-toggle,
  .skip-link { display: none !important; }
  body { background: #fff; color: #000; }
}