/* ============================================================
   四季体育汇 — 共享站点样式 /assets/site.css
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

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

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

table { border-collapse: collapse; }

[hidden] { display: none !important; }

/* ---------- 2. Design Tokens ---------- */
:root {
  /* 色彩 */
  --celadon-500: #2F7E6B;
  --celadon-700: #235F51;
  --celadon-100: #CDE8DF;
  --night-900: #0B1E33;
  --night-700: #132B47;
  --orange-500: #F28A2E;
  --red-500: #D94B45;
  --paper-050: #F7F4EC;
  --mist-200: #D8DEE4;
  --ink-900: #101820;
  --neon-300: #7AD9C0;

  /* 字体 */
  --font-display: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", "JetBrains Mono", "Roboto Mono", Consolas, "Liberation Mono", Menlo, monospace;

  /* 尺寸与节奏 */
  --wrap: 1240px;
  --pad-x: clamp(16px, 4.4vw, 56px);
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 34px;

  /* 阴影 */
  --shadow-1: 0 1px 2px rgba(11, 30, 51, .06), 0 10px 26px -16px rgba(11, 30, 51, .28);
  --shadow-2: 0 2px 4px rgba(11, 30, 51, .08), 0 22px 46px -20px rgba(11, 30, 51, .38);

  /* 层级 */
  --z-progress: 240;
  --z-header: 180;
  --z-nav: 190;
  --z-skip: 300;
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-900);
  background-color: var(--paper-050);
  background-image:
    radial-gradient(880px 520px at 92% -12%, rgba(47, 126, 107, .13), transparent 62%),
    radial-gradient(720px 440px at -8% 4%, rgba(122, 217, 192, .16), transparent 66%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-wrap: pretty;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--night-900);
}

p { text-wrap: pretty; }

::selection {
  background: var(--celadon-100);
  color: var(--night-900);
}

/* ---------- 4. 可访问性 ---------- */
:where(a, button, [tabindex]):focus-visible {
  outline: 3px solid var(--celadon-500);
  outline-offset: 3px;
  border-radius: 8px;
}

.site-footer :where(a, button):focus-visible,
.header-utility :where(a, button):focus-visible {
  outline-color: var(--neon-300);
}

#main-content { scroll-margin-top: 132px; }
#main-content:focus { outline: none; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: var(--z-skip);
  transform: translateY(-180%);
  transition: transform .18s ease;
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--night-900);
  color: var(--paper-050);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  box-shadow: var(--shadow-2);
}

.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 5. 布局容器 ---------- */
.wrap {
  width: min(calc(100% - (var(--pad-x) * 2)), var(--wrap));
  margin-inline: auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: start;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 258px), 1fr));
  gap: clamp(14px, 2.2vw, 24px);
}

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

/* ---------- 6. 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: var(--z-progress);
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--celadon-500) 0%, var(--neon-300) 46%, var(--orange-500) 100%);
  pointer-events: none;
}

/* ---------- 7. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  isolation: isolate;
}

.header-utility {
  background: var(--night-900);
  color: var(--celadon-100);
}

.header-utility__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 36px;
  padding-block: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
}

.header-utility__motto {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--celadon-100);
}

.header-utility__pulse {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon-300);
  box-shadow: 0 0 0 3px rgba(122, 217, 192, .18);
  animation: pulse-rec 2.6s ease-in-out infinite;
}

@keyframes pulse-rec {
  0%, 100% { box-shadow: 0 0 0 3px rgba(122, 217, 192, .16); }
  50% { box-shadow: 0 0 0 6px rgba(122, 217, 192, .04); }
}

.header-utility__meta {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  flex: 0 0 auto;
}

.header-utility__mail {
  color: rgba(205, 232, 223, .82);
}

.header-utility__link {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(122, 217, 192, .5);
  color: var(--neon-300);
  font-size: 11px;
  letter-spacing: .12em;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.header-utility__link:hover {
  background: var(--neon-300);
  border-color: var(--neon-300);
  color: var(--night-900);
}

.header-main {
  background: rgba(247, 244, 236, .94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--mist-200);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .6) inset;
}

.header-main__inner {
  display: grid;
  grid-template-columns: minmax(196px, 254px) minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding-block: 12px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 14px 14px 14px 5px;
  background: var(--night-900);
  overflow: hidden;
  transition: border-radius .24s ease, background-color .24s ease;
}

.brand__mark::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--celadon-500);
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange-500);
}

.brand__mark > span {
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: 9px;
  height: 3px;
  border-radius: 3px;
  background: var(--neon-300);
  opacity: .85;
}

.brand:hover .brand__mark {
  border-radius: 14px 5px 14px 14px;
  background: var(--night-700);
}

.brand__text { display: block; min-width: 0; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .08em;
  line-height: 1.2;
  color: var(--ink-900);
}

.brand__sub {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--celadon-500);
  white-space: nowrap;
}

/* 主导航 */
.primary-nav { justify-self: end; min-width: 0; }

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 3px;
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 11px;
  border-radius: 10px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .015em;
  color: var(--night-900);
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease, transform .18s ease;
}

.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--celadon-500);
  transition: color .18s ease;
}

.nav-link:hover { background: var(--celadon-100); }

.nav-link[aria-current="page"] {
  background: var(--celadon-500);
  color: var(--paper-050);
}

.nav-link[aria-current="page"] .nav-link__idx { color: var(--celadon-100); }

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: 12px;
  border: 1px solid var(--mist-200);
  background: #fff;
  color: var(--night-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  transition: border-color .18s ease, background-color .18s ease;
}

.nav-toggle:hover { border-color: var(--celadon-500); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s ease, opacity .2s 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); }

/* ---------- 8. 筛选条组件 ---------- */
.filter-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-block: 7px;
  border-block: 1px solid var(--mist-200);
  background: rgba(247, 244, 236, .72);
}

.filter-strip__viewport {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 30px);
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-block: 3px;
}

.filter-strip__viewport::-webkit-scrollbar { display: none; }

.filter-group {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
}

.filter-group__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: rgba(16, 24, 32, .46);
  white-space: nowrap;
}

.filter-group__chips {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--mist-200);
  background: #fff;
  color: var(--night-900);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}

.chip:hover { border-color: var(--celadon-500); color: var(--celadon-700); }

.chip[aria-pressed="true"] {
  background: var(--celadon-500);
  border-color: var(--celadon-500);
  color: var(--paper-050);
}

.chip__count {
  font-family: var(--font-mono);
  font-size: 10.5px;
  opacity: .68;
}

.filter-strip__btn {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--mist-200);
  background: #fff;
  color: var(--night-900);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: background-color .16s ease, border-color .16s ease, opacity .16s ease;
}

.filter-strip__btn:hover { background: var(--celadon-100); border-color: var(--celadon-500); }
.filter-strip__btn:disabled { opacity: .34; cursor: default; }

/* ---------- 9. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: transform .16s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease, color .18s ease;
}

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

.btn--primary { background: var(--celadon-500); color: var(--paper-050); }
.btn--primary:hover { background: var(--celadon-700); }

.btn--dark { background: var(--night-900); color: var(--paper-050); }
.btn--dark:hover { background: var(--night-700); }

.btn--accent { background: var(--orange-500); color: #26180a; }
.btn--accent:hover { background: #e07a1f; }

.btn--ghost {
  background: transparent;
  border-color: var(--mist-200);
  color: var(--night-900);
}

.btn--ghost:hover { border-color: var(--celadon-500); color: var(--celadon-700); }

/* ---------- 10. 标签、面板、索引字 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--celadon-100);
  color: #1e5548;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
}

.tag--live { background: rgba(217, 75, 69, .14); color: #9d2b26; }
.tag--soon { background: rgba(242, 138, 46, .17); color: #9b5512; }

.panel {
  background: #fff;
  border: 1px solid var(--mist-200);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.6vw, 30px);
  box-shadow: var(--shadow-1);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.panel:hover { border-color: var(--celadon-100); }

.panel--dark {
  background: var(--night-900);
  border-color: transparent;
  color: var(--paper-050);
  box-shadow: var(--shadow-2);
}

.panel--dark h2,
.panel--dark h3 { color: var(--paper-050); }

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--celadon-700);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange-500);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 34px);
  letter-spacing: .015em;
  line-height: 1.14;
  color: var(--night-900);
}

/* ---------- 11. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(16, 24, 32, .5);
}

.crumbs__item {
  display: inline-flex;
  align-items: center;
}

.crumbs__item:not(:last-child)::after {
  content: "/";
  margin-left: 10px;
  color: rgba(16, 24, 32, .26);
}

.crumbs a { color: var(--celadon-700); transition: color .16s ease; }
.crumbs a:hover { color: var(--orange-500); }
.crumbs [aria-current="page"] { color: var(--ink-900); }

/* ---------- 12. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: #1c2936;
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 29px);
  letter-spacing: .015em;
  line-height: 1.22;
  margin-top: 2.1em;
  padding-left: 14px;
  border-left: 4px solid var(--celadon-500);
  color: var(--night-900);
}

.prose h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  margin-top: 1.7em;
  color: var(--night-900);
}

.prose a {
  color: var(--celadon-700);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  text-decoration-color: rgba(47, 126, 107, .45);
  transition: color .16s ease, text-decoration-color .16s ease;
}

.prose a:hover { color: var(--orange-500); text-decoration-color: currentColor; }

.prose ul,
.prose ol { padding-left: 1.3em; }

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--celadon-500); }

.prose blockquote {
  border-left: 3px solid var(--orange-500);
  padding: 4px 0 4px 18px;
  color: rgba(16, 24, 32, .76);
  font-style: normal;
}

.prose code {
  font-family: var(--font-mono);
  font-size: .92em;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--celadon-100);
  color: var(--celadon-700);
}

/* ---------- 13. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--radius-xl);
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 110% at 82% 8%, rgba(47, 126, 107, .55), transparent 62%),
    linear-gradient(150deg, var(--night-700), var(--night-900));
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 34px 16px 14px;
  background: linear-gradient(to top, rgba(11, 30, 51, .88), transparent);
  color: var(--paper-050);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
}

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--night-900);
  color: var(--celadon-100);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--celadon-500) 0 34%,
    var(--orange-500) 34% 46%,
    var(--red-500) 46% 53%,
    var(--night-700) 53% 100%);
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: 620px;
  height: 420px;
  border-radius: 50% 40% 60% 45%;
  background: radial-gradient(circle at 40% 40%, rgba(47, 126, 107, .5), transparent 70%);
  pointer-events: none;
}

.footer-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(250px, 1.5fr) repeat(3, minmax(130px, .8fr));
  gap: clamp(24px, 3.6vw, 52px);
  padding-block: clamp(40px, 5.5vw, 68px) clamp(26px, 3.6vw, 42px);
}

.footer-brand .brand__mark { background: var(--night-700); }
.footer-brand .brand__name { color: var(--paper-050); }
.footer-brand .brand__sub { color: var(--neon-300); }

.footer-slogan {
  margin-top: 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.5;
  letter-spacing: .03em;
  color: var(--paper-050);
}

.footer-desc {
  margin-top: 10px;
  max-width: 32ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(205, 232, 223, .74);
}

.footer-contact {
  display: grid;
  gap: 9px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(216, 222, 228, .14);
}

.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.footer-contact__k {
  flex: 0 0 auto;
  color: rgba(122, 217, 192, .68);
}

.footer-contact__v {
  color: var(--paper-050);
  word-break: break-all;
}

.footer-col__title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--neon-300);
}

.footer-links li + li { margin-top: 10px; }

.footer-links a {
  display: inline-block;
  font-size: 14px;
  color: rgba(216, 222, 228, .82);
  transition: color .18s ease, transform .18s ease;
}

.footer-links a:hover {
  color: var(--paper-050);
  transform: translateX(3px);
}

.footer-base {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(216, 222, 228, .14);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-block: 18px 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: rgba(205, 232, 223, .62);
}

.footer-base__copy { color: rgba(205, 232, 223, .82); }

.footer-base__note {
  max-width: 56ch;
  color: rgba(205, 232, 223, .58);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1240px) {
  .nav-link { padding: 9px 9px; font-size: 13.5px; }
  .nav-link__idx { display: none; }
}

@media (max-width: 1080px) {
  .header-main__inner { gap: 16px; }
  .nav-link { padding: 8px 8px; font-size: 13px; }
  .brand__sub { letter-spacing: .14em; }
}

@media (max-width: 1000px) {
  html { scroll-padding-top: 118px; }

  .header-main__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0;
    padding-block: 11px;
  }

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

  .primary-nav {
    flex: 1 0 100%;
    justify-self: stretch;
    display: none;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--mist-200);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    display: flex;
    align-items: baseline;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 15px;
  }

  .nav-link__idx { display: inline; font-size: 10.5px; }

  .footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 780px) {
  .header-utility__mail { display: none; }
  .header-utility__inner { gap: 12px; font-size: 11px; letter-spacing: .05em; }
  .footer-base__inner { justify-content: flex-start; }
}

@media (max-width: 620px) {
  :root { --radius-xl: 24px; }
  .filter-strip__btn { display: none; }
  .filter-strip__viewport { padding-inline: 2px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-desc { max-width: 46ch; }
  .btn { padding: 11px 18px; font-size: 14px; }
}

/* ---------- 16. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover,
  .footer-links a:hover,
  .panel:hover { transform: none; }
}