/* ============================================================
   星空赛场 · 共享样式 /assets/site.css
   夜间球场 + 星图 + 展览画册三层语言
   ============================================================ */

:root {
  --ink: #070B18;
  --orbit: #101C38;
  --cream: #F1E6CF;
  --letterpress: #211711;
  --orange: #FF6B2C;
  --orange-ink: #B84A19;
  --cyan: #35E0D2;
  --violet: #6F6587;
  --signal: #D94B33;
  --mist: #E9EEF7;
  --gridline: #1E5B63;

  --mist-70: rgba(233, 238, 247, 0.72);
  --mist-50: rgba(233, 238, 247, 0.5);
  --mist-34: rgba(233, 238, 247, 0.34);
  --line-cyan: rgba(53, 224, 210, 0.22);
  --line-cyan-soft: rgba(53, 224, 210, 0.14);
  --line-paper: rgba(241, 230, 207, 0.2);

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

  --shell-max: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --shadow-paper: 0 20px 44px rgba(3, 6, 14, 0.5);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --cut: 18px;
}

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

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

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

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

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

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

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

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

/* ---------- 基础画布 ---------- */
body {
  position: relative;
  min-height: 100vh;
  background-color: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 12% 16%, rgba(53, 224, 210, 0.09), transparent 44%),
    radial-gradient(circle at 84% 6%, rgba(255, 107, 44, 0.08), transparent 42%),
    radial-gradient(1.3px 1.3px at 18% 24%, rgba(233, 238, 247, 0.5), transparent 100%),
    radial-gradient(1px 1px at 62% 12%, rgba(233, 238, 247, 0.36), transparent 100%),
    radial-gradient(1.5px 1.5px at 36% 68%, rgba(53, 224, 210, 0.42), transparent 100%),
    radial-gradient(1px 1px at 78% 52%, rgba(233, 238, 247, 0.32), transparent 100%),
    radial-gradient(1.2px 1.2px at 8% 82%, rgba(255, 107, 44, 0.36), transparent 100%),
    radial-gradient(1px 1px at 92% 88%, rgba(53, 224, 210, 0.3), transparent 100%);
}

#main-content {
  position: relative;
  z-index: 1;
  display: block;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--cream);
  color: var(--letterpress);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  border: 2px solid var(--orange);
  transition: top 0.18s var(--ease);
}

.skip-link:focus {
  top: 8px;
}

/* ============================================================
   页头 · 居中刊头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(7, 11, 24, 0.98), rgba(9, 15, 32, 0.94));
  border-bottom: 1px solid var(--line-cyan);
  box-shadow: 0 14px 34px rgba(3, 6, 14, 0.55);
  backdrop-filter: blur(9px);
}

.header-progress {
  height: 2px;
  background: rgba(233, 238, 247, 0.07);
  overflow: hidden;
}

.header-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: width 0.12s linear;
}

.header-frame {
  position: relative;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.header-masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 14px 0 12px;
  transition: padding 0.24s var(--ease);
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-34);
}

.header-meta__line {
  white-space: nowrap;
}

.header-meta__line--cyan {
  color: rgba(53, 224, 210, 0.75);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 0 18px;
  text-align: center;
}

.brand__name {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.26em;
  text-indent: 0.26em;
  color: var(--cream);
  transition: font-size 0.24s var(--ease), color 0.2s var(--ease);
}

.brand:hover .brand__name { color: #fff; }

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  color: var(--cyan);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-34);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.header-badge {
  padding: 5px 9px;
  background: var(--cream);
  color: var(--letterpress);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  white-space: nowrap;
  border: 1px solid rgba(33, 23, 17, 0.4);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 7px 100%, 0 calc(100% - 7px));
}

.header-cta { white-space: nowrap; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line-paper);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan);
  background: rgba(53, 224, 210, 0.1);
}

.nav-toggle__bars {
  width: 18px;
  height: 12px;
  background-image:
    linear-gradient(var(--cyan), var(--cyan)),
    linear-gradient(var(--cyan), var(--cyan)),
    linear-gradient(var(--cyan), var(--cyan));
  background-repeat: no-repeat;
  background-size: 100% 2px, 100% 2px, 100% 2px;
  background-position: 0 0, 0 5px, 0 10px;
  transition: background-position 0.22s var(--ease), background-size 0.22s var(--ease);
}

.nav-toggle__text { text-transform: uppercase; }

.site-header[data-open="true"] .nav-toggle__bars {
  background-size: 100% 2px, 100% 2px, 100% 2px;
  background-position: 0 5px, 0 5px, 0 5px;
  background-image:
    linear-gradient(var(--orange), var(--orange)),
    linear-gradient(var(--orange), var(--orange)),
    linear-gradient(var(--orange), var(--orange));
  transform: rotate(0deg);
}

.site-header[data-open="true"] .nav-toggle__text { color: var(--orange); }

/* 栏目导航 */
.site-nav {
  border-top: 1px solid var(--line-paper);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  counter-reset: navi;
}

.site-nav__list > li {
  position: relative;
  counter-increment: navi;
}

.site-nav__list a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 11px 18px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: rgba(233, 238, 247, 0.78);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.site-nav__list a::before {
  content: counter(navi, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: rgba(53, 224, 210, 0.6);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.site-nav__list a:hover {
  color: var(--cream);
  background: rgba(233, 238, 247, 0.04);
}

.site-nav__list a:hover::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] {
  color: var(--cream);
  background: rgba(53, 224, 210, 0.08);
}

.site-nav__list a[aria-current="page"]::before { color: var(--orange); }

.site-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyan);
}

.site-nav__foot { display: none; }

.site-nav__note {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mist-34);
}

/* 滚动收缩态 */
.site-header.is-condensed .header-masthead { padding: 8px 0 6px; }
.site-header.is-condensed .brand__name { font-size: 20px; }
.site-header.is-condensed .brand__tag { display: none; }
.site-header.is-condensed .header-meta { font-size: 9px; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(32px, 5vw, 64px);
  background: linear-gradient(180deg, #070B18 0%, #0B1330 46%, #060C1A 100%);
  border-top: 1px solid rgba(53, 224, 210, 0.26);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    linear-gradient(to right, rgba(30, 91, 99, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 91, 99, 0.34) 1px, transparent 1px);
  background-size: 64px 64px;
}

.footer-frame {
  position: relative;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 60px) var(--gutter) 22px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr 1.3fr;
  gap: 32px 28px;
  padding-bottom: 32px;
  border-bottom: 1px dashed var(--line-paper);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--cream);
}

.footer-brand__line {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.footer-brand__desc {
  margin-top: 12px;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-70);
}

.footer-brand__cert {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(241, 230, 207, 0.82);
  border: 1px solid rgba(241, 230, 207, 0.26);
  background: rgba(255, 107, 44, 0.08);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mist-50);
}

.footer-list li + li { margin-top: 9px; }

.footer-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(233, 238, 247, 0.78);
  transition: color 0.18s var(--ease);
}

.footer-list a::before {
  content: "";
  width: 6px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.65;
  transition: width 0.2s var(--ease), background-color 0.2s var(--ease);
}

.footer-list a:hover { color: var(--cream); }

.footer-list a:hover::before {
  width: 14px;
  background: var(--orange);
}

.footer-list a[aria-current="page"] { color: var(--cream); }

.footer-list a[aria-current="page"]::before {
  width: 14px;
  background: var(--orange);
}

.footer-contact,
.footer-col--contact { min-width: 0; }

.copy-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 3px 8px;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(241, 230, 207, 0.13);
}

.copy-line__label {
  flex: 0 0 100%;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist-34);
}

.copy-line__value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.copy-btn {
  flex: 0 0 auto;
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  border: 1px solid rgba(53, 224, 210, 0.4);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.copy-btn:hover {
  background: rgba(53, 224, 210, 0.14);
  color: #9df5ee;
}

.copy-note {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.copy-note:empty { display: none; }

.footer-address {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-70);
}

.footer-hours {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(53, 224, 210, 0.8);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-top: 20px;
}

.footer-legal__icp,
.footer-legal__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-50);
}

.footer-legal__meta { color: var(--mist-34); }

/* ============================================================
   通用版式
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  position: relative;
  z-index: 1;
  padding: clamp(40px, 6vw, 78px) 0;
}

.section--tight { padding: clamp(26px, 3.6vw, 46px) 0; }

.section--orbit {
  background: linear-gradient(180deg, #101C38 0%, #0B1330 100%);
  border-top: 1px solid var(--line-cyan-soft);
  border-bottom: 1px solid var(--line-cyan-soft);
}

.section--violet {
  background: linear-gradient(105deg, rgba(111, 101, 135, 0.3) 0%, rgba(16, 28, 56, 0.82) 58%, rgba(53, 224, 210, 0.08) 100%);
  border-top: 1px solid rgba(111, 101, 135, 0.4);
  border-bottom: 1px solid rgba(111, 101, 135, 0.4);
}

.section--paper {
  background-color: var(--cream);
  background-image:
    repeating-linear-gradient(0deg, rgba(33, 23, 17, 0.035) 0 1px, transparent 1px 4px),
    radial-gradient(circle at 82% 12%, rgba(184, 74, 25, 0.1), transparent 52%);
  color: var(--letterpress);
  border-top: 1px solid rgba(33, 23, 17, 0.2);
  border-bottom: 1px solid rgba(33, 23, 17, 0.2);
}

.section--paper .eyebrow { color: var(--orange-ink); }
.section--paper .section-title { color: var(--letterpress); }
.section--paper .lead { color: rgba(33, 23, 17, 0.78); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
}

.section-title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.section-title__num {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 0.52em;
  letter-spacing: 0.1em;
  color: var(--orange);
  vertical-align: 0.26em;
}

.lead {
  margin-top: 14px;
  max-width: 38em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--mist-70);
}

.prose {
  max-width: 44em;
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(233, 238, 247, 0.86);
}

.prose > * + * { margin-top: 1em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.prose h2 { font-size: 22px; }
.prose h3 { font-size: 18px; }

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

.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

.prose strong { color: var(--cream); }

.prose a {
  color: var(--cyan);
  border-bottom: 1px dashed rgba(53, 224, 210, 0.55);
}

.section--paper .prose { color: rgba(33, 23, 17, 0.86); }
.section--paper .prose h2,
.section--paper .prose h3,
.section--paper .prose strong { color: var(--letterpress); }
.section--paper .prose a {
  color: var(--orange-ink);
  border-bottom-color: rgba(184, 74, 25, 0.5);
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: 1.15fr 0.85fr; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: 1px;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn--accent {
  background: var(--orange);
  color: #1A0E06;
  font-weight: 600;
}

.btn--accent:hover {
  background: #ff8a56;
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: var(--line-paper);
  color: var(--mist);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cream);
  background: rgba(53, 224, 210, 0.1);
}

.btn--cyan {
  border-color: rgba(53, 224, 210, 0.55);
  color: var(--cyan);
}

.btn--cyan:hover {
  background: rgba(53, 224, 210, 0.14);
  color: #a8f7f1;
}

.btn--ink {
  background: var(--letterpress);
  color: var(--cream);
}

.btn--ink:hover { background: #3a2a20; }

.btn--sm {
  padding: 8px 13px;
  font-size: 11px;
  letter-spacing: 0.12em;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--line-paper);
  color: var(--mist-70);
}

.tag--cyan {
  border-color: rgba(53, 224, 210, 0.5);
  color: var(--cyan);
  background: rgba(53, 224, 210, 0.08);
}

.tag--orange {
  border-color: rgba(255, 107, 44, 0.5);
  color: var(--orange);
  background: rgba(255, 107, 44, 0.1);
}

.tag--violet {
  border-color: rgba(111, 101, 135, 0.65);
  color: #c3b9d8;
  background: rgba(111, 101, 135, 0.24);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--cream);
  background: rgba(255, 107, 44, 0.16);
  border: 1px solid rgba(241, 230, 207, 0.32);
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-50);
}

.crumbs__item { color: var(--mist-50); }
.crumbs__item a:hover { color: var(--cyan); }
.crumbs__item[aria-current="page"] { color: var(--cream); }

.crumbs__sep {
  color: rgba(53, 224, 210, 0.6);
  font-size: 10px;
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: 22px;
  background: linear-gradient(180deg, rgba(16, 28, 56, 0.92), rgba(11, 18, 38, 0.92));
  border: 1px solid var(--line-cyan);
}

.card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist-34);
}

.card__text {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist-70);
}

.card--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.card--slat {
  background: linear-gradient(160deg, rgba(111, 101, 135, 0.34), rgba(16, 28, 56, 0.9) 65%);
  border-color: rgba(111, 101, 135, 0.55);
}

.card--paper {
  background: var(--cream);
  color: var(--letterpress);
  border-color: rgba(33, 23, 17, 0.25);
  box-shadow: var(--shadow-paper);
}

.card--paper .card__title { color: var(--letterpress); }
.card--paper .card__text { color: rgba(33, 23, 17, 0.78); }
.card--paper .card__meta { color: rgba(33, 23, 17, 0.5); }

/* ---------- 纸张插页 ---------- */
.paper-sheet {
  position: relative;
  padding: clamp(22px, 4vw, 44px);
  background-color: var(--cream);
  background-image:
    repeating-linear-gradient(0deg, rgba(33, 23, 17, 0.04) 0 1px, transparent 1px 4px),
    radial-gradient(circle at 88% 8%, rgba(184, 74, 25, 0.1), transparent 55%);
  color: var(--letterpress);
  border: 1px solid rgba(33, 23, 17, 0.24);
  box-shadow: var(--shadow-paper);
}

/* ---------- 图像容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(circle at 28% 22%, rgba(53, 224, 210, 0.18), transparent 55%),
    radial-gradient(circle at 76% 78%, rgba(255, 107, 44, 0.16), transparent 52%),
    linear-gradient(160deg, #101C38 0%, #070B18 62%, #0A1330 100%);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(to right, rgba(30, 91, 99, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 91, 99, 0.4) 1px, transparent 1px);
  background-size: 48px 48px;
}

.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: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame--cut {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 92% 100%, 0 100%);
}

.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist-50);
}

/* ---------- 数据模块 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(108px, 1fr));
  gap: 1px;
  background: rgba(53, 224, 210, 0.2);
  border: 1px solid rgba(53, 224, 210, 0.2);
}

.stat {
  padding: 14px 12px;
  background: rgba(11, 18, 38, 0.94);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--cyan);
}

.stat__label {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist-50);
}

.dense-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 6px;
}

.dense-grid__cell {
  padding: 10px 8px;
  background: rgba(111, 101, 135, 0.24);
  border: 1px solid rgba(111, 101, 135, 0.45);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-70);
  text-align: center;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.dense-grid__cell:hover {
  background: rgba(53, 224, 210, 0.16);
  border-color: rgba(53, 224, 210, 0.6);
  color: var(--cream);
}

/* ---------- 时间轴 ---------- */
.timeline {
  position: relative;
  margin-left: 6px;
  padding-left: 26px;
  border-left: 1px dashed rgba(53, 224, 210, 0.4);
}

.timeline__item {
  position: relative;
  padding-bottom: 26px;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  border-radius: 50%;
}

.timeline__item:nth-child(3n)::before { border-color: var(--orange); }

/* ---------- 索引列表 ---------- */
.index-list {
  display: grid;
  border-top: 1px solid var(--line-cyan);
}

.index-list > li { border-bottom: 1px solid var(--line-cyan); }

.index-list__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 14px 6px;
  transition: background-color 0.18s var(--ease), padding-left 0.2s var(--ease);
}

.index-list__link:hover {
  background: rgba(53, 224, 210, 0.07);
  padding-left: 12px;
}

.index-list__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

/* ---------- 可展开内容组 ---------- */
.disclosure {
  border: 1px solid var(--line-cyan);
  background: rgba(16, 28, 56, 0.68);
}

.disclosure + .disclosure { margin-top: 10px; }

.disclosure__button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 15px 18px;
  text-align: left;
  font-size: 15.5px;
  color: var(--mist);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.disclosure__button:hover {
  background: rgba(53, 224, 210, 0.08);
  color: var(--cream);
}

.disclosure.is-open .disclosure__button {
  color: var(--cream);
  border-bottom: 1px solid var(--line-cyan-soft);
}

.disclosure__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 1px solid rgba(53, 224, 210, 0.6);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.disclosure__icon::before,
.disclosure__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.disclosure__icon::before { width: 8px; height: 1px; }
.disclosure__icon::after { width: 1px; height: 8px; }

.disclosure.is-open .disclosure__icon {
  transform: rotate(90deg);
  border-color: var(--orange);
}

.disclosure.is-open .disclosure__icon::before,
.disclosure.is-open .disclosure__icon::after { background: var(--orange); }

.disclosure.is-open .disclosure__icon::after { height: 1px; }

.disclosure__panel {
  padding: 14px 18px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-70);
}

.disclosure__panel:not([hidden]) {
  animation: panel-in 0.24s var(--ease) both;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 筛选标签组 ---------- */
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-70);
  border: 1px solid var(--line-paper);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.filter-btn:hover {
  color: var(--cream);
  border-color: rgba(53, 224, 210, 0.6);
}

.filter-btn[aria-pressed="true"] {
  color: #08211f;
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 状态工具类 ---------- */
.is-hidden { display: none !important; }

.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .header-badge { display: none; }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .site-header .header-masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 10px 0;
  }

  .header-meta { display: none; }

  .brand {
    align-items: flex-start;
    padding: 0;
    text-align: left;
  }

  .brand__name { font-size: 21px; }
  .brand__tag { font-size: 9px; }
  .header-actions { gap: 8px; }
  .nav-toggle { display: inline-flex; }

  .site-header .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: linear-gradient(180deg, #0B1330, #070B18);
    border-top: 1px solid var(--line-cyan-soft);
    border-bottom: 1px solid var(--line-cyan);
    transition: max-height 0.34s var(--ease), opacity 0.22s var(--ease), visibility 0.22s var(--ease);
  }

  .site-header[data-open="true"] .site-nav {
    max-height: min(78vh, 560px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 6px var(--gutter) 4px;
  }

  .site-nav__list a {
    display: flex;
    padding: 14px 2px;
    border-bottom: 1px dashed rgba(241, 230, 207, 0.14);
  }

  .site-nav__list a::after { display: none; }

  .site-nav__list a[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--orange);
    padding-left: 12px;
  }

  .site-nav__foot {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 14px var(--gutter) 20px;
  }

  .grid--2,
  .grid--3,
  .grid--4,
  .grid--asym { grid-template-columns: minmax(0, 1fr); }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 20px;
  }

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

@media (max-width: 600px) {
  body { font-size: 16px; }

  .header-cta { display: none; }

  .brand__sub { font-size: 9px; letter-spacing: 0.24em; }

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

  .footer-legal { flex-direction: column; align-items: flex-start; }

  .section-title { font-size: clamp(22px, 6vw, 30px); }
}

/* ---------- 动效偏好 ---------- */
@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-reveal [data-reveal],
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}