/* ==========================================================================
   华体CN — 共享样式 /assets/site.css
   运动科技档案馆：夜蓝面板 · 展览标签 · 等宽日志
   ========================================================================== */

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

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

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

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; padding: 0; cursor: pointer; }

table { border-collapse: collapse; border-spacing: 0; }

:root {
  --night: #0B2239;
  --ink-deep: #061322;
  --slate: #8FA3B8;
  --cream: #F5EFE3;
  --brown: #241A14;
  --orange: #F26522;
  --burnt: #B8430F;
  --cyan: #3FE0C8;
  --teal: #0E7A6C;
  --edge: #1E3A56;

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

  --header-h: 72px;
  --gutter: clamp(18px, 4vw, 48px);
  --maxw: 1320px;
  --reading: 66ch;
  --cut: 6px;
  --ease: cubic-bezier(.22, .72, .28, 1);
  --shadow-panel: 0 1px 0 rgba(30, 58, 86, .9), 0 18px 36px -28px rgba(0, 0, 0, .85);
}

@media (max-width: 640px) {
  :root { --header-h: 64px; }
}

body {
  background-color: var(--night);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: .02em;
}

h1 { font-size: clamp(2.4rem, 6vw, 5.5rem); line-height: 1.02; }
h2 { font-size: clamp(1.75rem, 3.4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.7rem); line-height: 1.22; }
h4 { font-size: 1.05rem; line-height: 1.4; font-weight: 500; }

p { max-width: var(--reading); }
strong, b { font-weight: 700; }

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
}

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

:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------
   通用容器 / 网格 / 画板
   --------------------------------------------------------------- */

.wrap,
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-narrow { max-width: 860px; }

.page-main {
  padding-top: calc(var(--header-h) + clamp(24px, 4vw, 56px));
}

#main-content { scroll-margin-top: calc(var(--header-h) + 12px); }

.grid {
  display: grid;
  gap: 24px;
}

.grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.panel-stack > * + * { margin-top: clamp(16px, 2.4vw, 28px); }

.panel-paper {
  background: var(--cream);
  color: var(--brown);
  border: 1px solid rgba(36, 26, 20, .14);
  box-shadow: var(--shadow-panel);
  padding: clamp(22px, 3.2vw, 44px);
}

.panel-paper h1,
.panel-paper h2,
.panel-paper h3,
.panel-paper h4 { color: var(--brown); }

.panel-paper a {
  color: var(--burnt);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------------------------------------------------------------
   展览标签 / 说明牌 / 面包屑
   --------------------------------------------------------------- */

.plate {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--slate);
}

.plate-num { flex: none; color: var(--orange); }

.plate-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--slate);
  text-transform: uppercase;
}

.plate-tag::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--orange);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--slate);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; opacity: .5; }
.breadcrumb a { color: var(--cream); transition: color .18s var(--ease); }
.breadcrumb a:hover { color: var(--orange); }

/* ---------------------------------------------------------------
   按钮
   --------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1;
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease),
    box-shadow .18s var(--ease);
}

.btn-primary {
  background: var(--orange);
  color: var(--ink-deep);
  box-shadow: inset 0 0 0 1px var(--orange);
}

.btn-primary:hover { background: #FF7C3D; box-shadow: inset 0 0 0 1px #FF7C3D; }

.btn-ghost {
  background: transparent;
  color: var(--cream);
  box-shadow: inset 0 0 0 1px var(--edge);
}

.btn-ghost:hover { color: var(--cyan); box-shadow: inset 0 0 0 1px var(--cyan); }

.btn:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--cyan), 0 0 0 2px var(--cyan); }

/* ---------------------------------------------------------------
   图片容器基础规则（页面阶段放置 img 占位）
   --------------------------------------------------------------- */

.frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-deep);
  border: 1px solid var(--edge);
  isolation: isolate;
}

.frame > img,
.frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05) brightness(.95);
}

.frame::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--orange);
  z-index: 2;
}

.frame-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .55;
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0 47px,
    rgba(63, 224, 200, .12) 47px 48px
  );
}

.frame-16x9 { aspect-ratio: 16 / 9; }
.frame-4x3  { aspect-ratio: 4 / 3; }
.frame-1x1  { aspect-ratio: 1 / 1; }
.frame-3x4  { aspect-ratio: 3 / 4; }

/* ---------------------------------------------------------------
   站点头部
   --------------------------------------------------------------- */

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-deep);
  background: var(--cyan);
  transform: translateY(-220%);
  transition: transform .16s var(--ease);
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .18s var(--ease), border-color .18s var(--ease),
    box-shadow .18s var(--ease);
}

.site-header[data-scrolled="true"] {
  background: var(--night);
  border-bottom-color: var(--edge);
  box-shadow: 0 10px 28px -24px rgba(0, 0, 0, .95);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
}

/* 品牌 ------------------------------------------------------- */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  padding-block: 8px;
}

.brand-mark {
  position: relative;
  width: 26px;
  height: 26px;
  flex: none;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 6px;
  top: 11px;
  height: 2px;
  background: var(--night);
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--cream);
}

.brand-name em { font-style: normal; color: var(--cyan); }

.brand-sub {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .2em;
  color: var(--slate);
}

/* 导航 ------------------------------------------------------- */

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 26px);
  margin-left: auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 24px);
}

.nav-item { flex: none; }

.nav-link {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  padding: 8px 2px 10px;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  opacity: .75;
  transition: color .18s var(--ease);
}

.nav-name {
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--cream);
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .18s var(--ease);
}

.nav-link:hover::before,
.nav-link:focus-visible::before { transform: scaleX(1); }

.nav-link:hover .nav-name { color: var(--orange); }

.nav-link[aria-current="page"] .nav-index { color: var(--cyan); opacity: 1; }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* 检索 ------------------------------------------------------- */

.nav-search {
  display: flex;
  align-items: stretch;
  flex: none;
  height: 38px;
  margin-left: clamp(4px, 1vw, 14px);
  border: 1px solid var(--edge);
  background: rgba(245, 239, 227, .05);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.nav-search:focus-within {
  border-color: var(--cyan);
  background: rgba(63, 224, 200, .08);
}

.search-field {
  width: clamp(130px, 15vw, 208px);
  min-width: 0;
  padding: 0 10px 0 12px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--cream);
  background: transparent;
  border: 0;
  outline: none;
}

.search-field::placeholder { color: var(--slate); opacity: .92; }
.search-field:focus-visible { outline: none; }

.search-go {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  height: 100%;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink-deep);
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6px 100%, 0 calc(100% - 6px));
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.search-go:hover { background: var(--cyan); }
.search-go:focus-visible { outline: none; background: var(--cyan); box-shadow: inset 0 0 0 2px var(--ink-deep); }

/* 短行动入口 -------------------------------------------------- */

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  white-space: nowrap;
  color: var(--cream);
  background: rgba(242, 101, 34, .1);
  box-shadow: inset 0 0 0 1px var(--edge);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: color .18s var(--ease), background-color .18s var(--ease),
    box-shadow .18s var(--ease);
}

.nav-cta:hover { color: var(--ink-deep); background: var(--orange); box-shadow: inset 0 0 0 1px var(--orange); }
.nav-cta:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--cyan); }

/* 移动目录按钮 ------------------------------------------------ */

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  flex: none;
  margin-left: auto;
  padding: 9px 12px;
  border: 1px solid var(--edge);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
}

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

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  flex: none;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
  transition: transform .18s var(--ease), top .18s var(--ease), bottom .18s var(--ease);
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 4px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { bottom: 5px; transform: rotate(-45deg); }

/* 阅读进度 ---------------------------------------------------- */

.read-progress {
  height: 2px;
  width: 100%;
  background: rgba(143, 163, 184, .16);
}

.read-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .12s linear;
  will-change: transform;
}

/* ---------------------------------------------------------------
   移动端整屏目录
   --------------------------------------------------------------- */

@media (max-width: 1120px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    z-index: 110;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: clamp(20px, 4vw, 32px) var(--gutter) 48px;
    background: var(--night);
    border-top: 1px solid var(--edge);
    overflow-y: auto;
    overscroll-behavior: contain;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .18s var(--ease), transform .18s var(--ease),
      visibility .18s var(--ease);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-search {
    order: -1;
    height: 48px;
    margin: 0 0 22px;
    background: rgba(245, 239, 227, .06);
  }

  .search-field { flex: 1 1 auto; width: auto; font-size: 14px; }
  .search-go { padding: 0 18px; font-size: 13px; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item { flex: none; }

  .nav-link {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
    padding: 15px 0;
    border-bottom: 1px solid var(--edge);
  }

  .nav-link::before { display: none; }
  .nav-link[aria-current="page"]::after { display: none; }

  .nav-index { font-size: 11px; }

  .nav-name {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(20px, 4.6vw, 26px);
  }

  .nav-link[aria-current="page"] .nav-name { color: var(--cyan); }

  .nav-cta {
    margin-top: 26px;
    padding: 15px 18px;
    font-size: 15px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  }
}

/* ---------------------------------------------------------------
   站点页脚
   --------------------------------------------------------------- */

.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-deep);
  color: var(--slate);
  border-top: 1px solid var(--edge);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 80px) var(--gutter) 28px;
}

.footer-about {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 72px);
  padding-bottom: clamp(32px, 4vw, 52px);
  border-bottom: 1px solid var(--edge);
}

.footer-label {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
  text-transform: uppercase;
  max-width: none;
}

.footer-label::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--cyan);
}

.footer-statement {
  max-width: 34ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.44;
  color: var(--cream);
  letter-spacing: .01em;
}

.footer-about-main .footer-meta {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--slate);
  max-width: none;
}

.footer-links {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--edge);
}

.footer-link {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--edge);
  transition: border-color .18s var(--ease);
}

.footer-link-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--slate);
  text-transform: uppercase;
  transition: color .18s var(--ease);
}

.footer-link-val {
  display: block;
  margin-top: 5px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--cream);
  transition: color .18s var(--ease);
  overflow-wrap: anywhere;
}

.footer-link:hover .footer-link-key,
.footer-link:focus-visible .footer-link-key { color: var(--cyan); }

.footer-link:hover .footer-link-val,
.footer-link:focus-visible .footer-link-val { color: var(--orange); }

.footer-link-static { cursor: default; }
.footer-link-static:hover .footer-link-val,
.footer-link-static:hover .footer-link-key { color: inherit; }
.footer-link-static:hover .footer-link-key { color: var(--slate); }

.footer-index {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: clamp(16px, 4vw, 48px);
  padding: clamp(24px, 3.4vw, 36px) 0;
  border-bottom: 1px solid var(--edge);
}

.footer-index-label {
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--slate);
  white-space: nowrap;
  max-width: none;
}

.footer-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px clamp(20px, 4vw, 56px);
}

.footer-index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  font-size: 15px;
  color: var(--cream);
  transition: color .18s var(--ease);
}

.footer-index-link .mono {
  font-size: 10px;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.footer-index-link:hover { color: var(--orange); }
.footer-index-link:hover .mono { color: var(--cyan); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: clamp(18px, 2.4vw, 28px);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--slate);
  max-width: none;
}

.footer-base .footer-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--slate);
  max-width: none;
}

@media (max-width: 860px) {
  .footer-about { grid-template-columns: minmax(0, 1fr); }
  .footer-statement { max-width: none; }
  .footer-index { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .footer-index-list { flex-direction: column; gap: 0; }
  .footer-index-link { padding: 8px 0; }
}

/* ---------------------------------------------------------------
   减少动效
   --------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .read-progress-bar { transition: none; }
  .site-nav { transform: none !important; }
}