/* ==========================================================================
   大发体育方 — /assets/site.css
   寒地夜赛视觉系统：侧轨品牌 / 双层信息导航 / 玻璃与实色并置
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #061826;
}

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

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

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

button {
  font: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

address { font-style: normal; }

/* --- 2. 设计令牌 -------------------------------------------------------- */
:root {
  /* 色彩 */
  --c-night:   #061826;
  --c-ice:     #0B2A42;
  --c-tactic:  #124A6A;
  --c-cyan:    #2EF2D0;
  --c-orange:  #FF6A3D;
  --c-yellow:  #FFE84A;
  --c-mist:    #EAF6FF;
  --c-slate:   #7F9BB0;
  --c-teal:    #0F5C5A;

  --glass:        rgba(234, 246, 255, 0.10);
  --glass-strong: rgba(234, 246, 255, 0.16);
  --line:         rgba(127, 155, 176, 0.28);
  --line-soft:    rgba(127, 155, 176, 0.16);
  --line-cyan:    rgba(46, 242, 208, 0.45);

  /* 字体 */
  --font-display: "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-data: "IBM Plex Mono", "Consolas", "Courier New", ui-monospace, monospace;

  /* 尺度 */
  --rail: 248px;
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1320px;
  --r-sm: 2px;
  --r-md: 4px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* --- 3. 排版基线 -------------------------------------------------------- */
body {
  min-height: 100vh;
  background: var(--c-night);
  color: var(--c-mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--c-mist);
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 7vw, 96px); }
h2 { font-size: clamp(28px, 4.2vw, 52px); }
h3 { font-size: clamp(20px, 2.4vw, 29px); line-height: 1.22; }
h4 { font-size: clamp(16px, 1.6vw, 20px); line-height: 1.34; }

p { max-width: 72ch; }

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

::selection { background: var(--c-cyan); color: var(--c-night); }

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

#main-content { scroll-margin-top: 24px; }

/* --- 4. 跳转链接 -------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--c-cyan);
  color: var(--c-night);
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--r-sm);
  box-shadow: 0 12px 30px -12px rgba(46, 242, 208, 0.8);
  transition: top 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { top: 14px; color: var(--c-night); }

/* --- 5. 页头 ------------------------------------------------------------ */
.site-header {
  position: relative;
  z-index: 50;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-night);
  border-bottom: 1px solid var(--line);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 160% at 0% 0%, rgba(46, 242, 208, 0.14), transparent 48%),
    linear-gradient(112deg, rgba(18, 74, 106, 0.78) 0%, rgba(18, 74, 106, 0.20) 44%, rgba(6, 24, 38, 0) 64%);
  clip-path: polygon(0 0, 58% 0, 46% 100%, 0 100%);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 0;
  width: clamp(80px, 16vw, 190px);
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transform: skewX(-28deg);
  transform-origin: left bottom;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) auto;
  align-items: center;
  gap: 0 clamp(16px, 2.4vw, 36px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter);
}

/* 5.1 品牌侧轨 */
.brand-rail {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
  padding-left: 16px;
}

.brand-rail::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 4px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-orange));
  transform: skewY(-8deg);
  transform-origin: top left;
}

.brand-rail__link {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-mist);
  white-space: nowrap;
  transition: color 0.18s var(--ease), text-shadow 0.18s var(--ease);
}
.brand-rail__link:hover,
.brand-rail__link:focus-visible {
  color: var(--c-cyan);
  text-shadow: 0 0 20px rgba(46, 242, 208, 0.5);
}

.brand-rail__note {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-slate);
  white-space: nowrap;
}

/* 5.2 双层信息导航 */
.header-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding-left: clamp(16px, 2.4vw, 32px);
  border-left: 1px solid var(--line);
}

.header-stack__intro {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 18px;
  min-width: 0;
}

.header-stack__primary {
  max-width: none;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.5;
  color: var(--c-mist);
}
.header-stack__primary::before {
  content: "//";
  margin-right: 8px;
  font-family: var(--font-data);
  letter-spacing: 0;
  color: var(--c-orange);
}

.header-stack__secondary {
  max-width: none;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--c-slate);
}

/* 5.3 主导航 */
.site-nav { min-width: 0; }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.site-nav__item { margin: 0; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 12px 10px;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(234, 246, 255, 0.78);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  transition:
    color 0.18s var(--ease),
    background-color 0.18s var(--ease),
    border-color 0.18s var(--ease),
    transform 0.18s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease), background-color 0.18s var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--c-mist);
  background: var(--glass);
  border-color: var(--line-cyan);
  transform: translateY(-1px);
}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--c-cyan);
  background: rgba(46, 242, 208, 0.10);
  border-color: var(--line-cyan);
}
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-orange);
}

/* 5.4 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
  background: var(--glass);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-sm);
  transition:
    background-color 0.18s var(--ease),
    color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.nav-toggle::before {
  content: "";
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
  transition: box-shadow 0.18s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(46, 242, 208, 0.16);
  border-color: var(--c-cyan);
}

.nav-toggle[aria-expanded="true"] {
  color: var(--c-night);
  background: var(--c-orange);
  border-color: var(--c-orange);
}

.nav-toggle__label {
  font-family: var(--font-data);
  letter-spacing: 0.16em;
}

/* --- 6. 页脚 ------------------------------------------------------------ */
.site-footer {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--c-night);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--c-cyan) 0 10%,
    var(--c-orange) 10% 19%,
    rgba(127, 155, 176, 0.22) 19% 100%
  );
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -55%;
  z-index: 0;
  width: 62%;
  height: 160%;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(18, 74, 106, 0.55), rgba(15, 92, 90, 0.20) 55%, transparent 78%);
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  transform: skewX(-6deg);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 2fr);
  gap: clamp(28px, 4vw, 56px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--gutter) 0;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  max-width: 340px;
}

.footer-brand__name {
  max-width: none;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-mist);
}
.footer-brand__name::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 14px;
  background: var(--c-orange);
  transform: skewY(-8deg);
}

.footer-brand__line {
  max-width: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-slate);
}

.footer-brand__note {
  max-width: none;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}

.footer-brand__address {
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: 0.03em;
  color: rgba(127, 155, 176, 0.9);
  max-width: 32ch;
  padding-top: 6px;
  border-top: 1px dashed var(--line-soft);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
  min-width: 0;
}

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

.footer-column__title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  line-height: 1.4;
  color: var(--c-cyan);
  border-bottom: 1px solid var(--line);
}

.footer-column__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-column__link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: rgba(234, 246, 255, 0.74);
  border-bottom: 1px solid transparent;
  transition:
    color 0.18s var(--ease),
    border-color 0.18s var(--ease),
    transform 0.18s var(--ease);
}
.footer-column__link:hover,
.footer-column__link:focus-visible {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
  transform: translateX(3px);
}

.footer-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  width: 100%;
  max-width: var(--maxw);
  margin: clamp(28px, 4vw, 44px) auto 0;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--c-slate);
}

.footer-meta__legal { color: var(--c-slate); }
.footer-meta__contact { color: rgba(234, 246, 255, 0.66); }
.footer-meta__year { color: rgba(127, 155, 176, 0.82); }

/* --- 7. 通用布局 ------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-main {
  display: block;
  padding-top: clamp(24px, 4vw, 52px);
}

.layout-rail {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(32px, 5vw, 64px); }

.section--band {
  background: var(--c-ice);
  border-block: 1px solid var(--line);
}

.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--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* --- 8. 面包屑 --------------------------------------------------------- */
.breadcrumbs {
  padding: 14px 0;
  margin-bottom: clamp(20px, 3vw, 36px);
  border-bottom: 1px solid var(--line);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--c-slate);
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumbs__item:not(:last-child)::after {
  content: "/";
  color: rgba(127, 155, 176, 0.5);
}

.breadcrumbs__link {
  padding-bottom: 1px;
  color: var(--c-slate);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* --- 9. 按钮 ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.3;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  transition:
    background-color 0.18s var(--ease),
    color 0.18s var(--ease),
    border-color 0.18s var(--ease),
    transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.btn--primary {
  color: #16070A;
  background: var(--c-orange);
  box-shadow: 0 12px 26px -16px rgba(255, 106, 61, 0.95);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FF8358;
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--c-cyan);
  background: var(--glass);
  border-color: var(--line-cyan);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(46, 242, 208, 0.16);
  border-color: var(--c-cyan);
  transform: translateY(-2px);
}

.btn__arrow {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0;
}

/* --- 10. 面板 / 标签 / 数据 ------------------------------------------- */
.panel {
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--c-tactic);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.glass-panel {
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--glass);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-md);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--c-orange);
  transform: skewY(-20deg);
}

.tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--c-cyan);
  background: rgba(46, 242, 208, 0.07);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-sm);
}
.tag--hot {
  color: var(--c-orange);
  background: rgba(255, 106, 61, 0.10);
  border-color: rgba(255, 106, 61, 0.5);
}
.tag--score {
  color: var(--c-yellow);
  background: rgba(255, 232, 74, 0.10);
  border-color: rgba(255, 232, 74, 0.45);
}

.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-yellow);
}

.rule {
  height: 1px;
  margin: clamp(24px, 4vw, 44px) 0;
  border: 0;
  background: linear-gradient(90deg, var(--c-cyan), rgba(46, 242, 208, 0));
}

/* --- 11. 图片容器基础规则 --------------------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  width: 100%;
  background:
    linear-gradient(135deg, var(--c-ice) 0%, var(--c-tactic) 58%, var(--c-teal) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  pointer-events: none;
  border: 1px solid rgba(46, 242, 208, 0.28);
  border-radius: var(--r-sm);
  background:
    linear-gradient(90deg, transparent 49.6%, rgba(46, 242, 208, 0.34) 49.6% 50.4%, transparent 50.4%),
    radial-gradient(circle at 50% 50%, transparent 21%, rgba(46, 242, 208, 0.30) 21% 21.7%, transparent 21.7%);
  opacity: 0.85;
}

.media-frame__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--cut {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  border-radius: 0;
}

.media-caption {
  margin-top: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-slate);
}

/* --- 12. 阅读进度条（由 site.js 注入） -------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  height: 3px;
  pointer-events: none;
  background: rgba(6, 24, 38, 0.45);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-yellow) 62%, var(--c-orange));
  transition: transform 0.12s linear;
}

/* --- 13. 响应式 -------------------------------------------------------- */
@media (max-width: 1100px) {
  :root { --rail: 210px; }
  .site-nav__link { font-size: 13.5px; padding: 8px 9px 10px; }
}

@media (max-width: 900px) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px 14px;
    padding: 14px var(--gutter);
  }

  .brand-rail { grid-column: 1; grid-row: 1; padding-left: 14px; }

  .nav-toggle {
    display: inline-flex;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .header-stack {
    grid-column: 1 / -1;
    grid-row: 2;
    gap: 0;
    padding-left: 0;
    padding-top: 10px;
    border-left: 0;
    border-top: 1px solid var(--line-soft);
  }

  .header-stack__intro { padding-top: 8px; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.3s var(--ease), visibility 0.3s var(--ease);
  }
  .site-nav[data-open] {
    max-height: 560px;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 10px 0 6px;
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: 13px 12px;
    font-size: 15px;
    border: 0;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
    transform: none;
  }
  .site-nav__link::after {
    left: auto;
    right: 12px;
    bottom: 50%;
    width: 22px;
    transform: translateY(50%) scaleX(0);
  }
  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    background: var(--glass);
    border-color: transparent;
    border-left-color: var(--c-cyan);
    transform: none;
  }
  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after,
  .site-nav__link[aria-current="page"]::after {
    transform: translateY(50%) scaleX(1);
  }
  .site-nav__link[aria-current="page"] {
    border-color: transparent;
    border-left-color: var(--c-orange);
    border-radius: 0;
  }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { max-width: none; }

  .layout-rail { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 760px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 20px;
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 11px;
  }
}

@media (max-width: 560px) {
  .header-stack__secondary { display: none; }
  .header-stack__primary { font-size: 11.5px; letter-spacing: 0.02em; }
  .brand-rail__note { font-size: 10px; letter-spacing: 0.16em; }
  .btn { width: 100%; justify-content: center; }
}

/* --- 14. 无障碍：减少动效 --------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .scroll-progress__bar { transition: none; }
}