/* ==========================================================================
   皇冠赛场 · 共享样式 /assets/site.css
   夜场竞技指挥中心 + 复古体育档案：直角、细线、精密网格、金线锚点
   ========================================================================== */

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

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

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }

:root {
  /* 识别色 */
  --gold: #D4AF37;
  --gold-hi: #F1D77C;
  --ink-green: #0B3D2E;
  --field: #143F35;
  --midnight: #111111;
  --signal: #FF6B1A;
  --cream: #F6EFDF;
  --paper: #FBF8F0;
  --ink: #1B1A17;
  --line: #3A3A32;
  --muted: #6F7468;
  --white: #FFFFFF;

  /* 线条与层次 */
  --line-color: rgba(58, 58, 50, 0.34);
  --line-faint: rgba(58, 58, 50, 0.18);
  --line-on-dark: rgba(212, 175, 55, 0.36);
  --gold-soft: rgba(212, 175, 55, 0.16);

  /* 字体 */
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-head: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto 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;

  /* 版式尺寸 */
  --shell: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --gap: clamp(14px, 1.8vw, 24px);
  --sp-xs: clamp(6px, 0.8vw, 10px);
  --sp-sm: clamp(12px, 1.6vw, 18px);
  --sp-md: clamp(20px, 2.6vw, 32px);
  --sp-lg: clamp(32px, 4.4vw, 56px);
}

body {
  background-color: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 900; line-height: 1.32; letter-spacing: 0.01em; }

p { text-wrap: pretty; }

a { color: inherit; }

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

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

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

::selection { background: var(--gold); color: var(--midnight); }

/* ---------- 跳过导航 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  transform: translateY(-130%);
  background: var(--gold);
  color: var(--midnight);
  padding: 10px 18px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1px solid var(--midnight);
  transition: transform 0.18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); outline: 2px solid var(--midnight); outline-offset: -4px; }

/* ==========================================================================
   头部刊头
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--ink-green);
  border-bottom: 1px solid var(--line-on-dark);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4), 0 10px 24px rgba(11, 61, 46, 0.16);
}

/* 顶部快捷条 */
.rail {
  background: var(--midnight);
  border-bottom: 1px solid rgba(212, 175, 55, 0.22);
}
.rail__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 6px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 14px;
}
.rail__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold-hi);
  white-space: nowrap;
}
.rail__tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--signal);
  display: block;
}
.rail__links { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.rail-link {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 11px;
  border: 1px solid rgba(212, 175, 55, 0.42);
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.rail-link:hover,
.rail-link:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--midnight);
}
.rail-link--signal {
  border-color: rgba(255, 107, 26, 0.85);
  background: rgba(255, 107, 26, 0.16);
  color: var(--white);
}
.rail-link--signal:hover,
.rail-link--signal:focus-visible {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

/* 报头式品牌 */
.masthead__brand-wrap {
  display: flex;
  justify-content: center;
  padding: clamp(12px, 2.2vw, 24px) var(--gutter) clamp(8px, 1.4vw, 14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 14px);
  text-decoration: none;
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 900;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: clamp(28px, 3.4vw, 38px);
  height: clamp(28px, 3.4vw, 38px);
  border: 1px solid var(--gold);
  background: var(--gold-soft);
  color: var(--gold-hi);
  font-family: var(--font-display);
  font-size: clamp(15px, 1.8vw, 19px);
  line-height: 1;
  flex: 0 0 auto;
  transition: background-color 0.18s ease, color 0.18s ease;
}
.brand:hover .brand__mark { background: var(--gold); color: var(--midnight); }
.brand__name {
  font-size: clamp(25px, 4.6vw, 44px);
  line-height: 1.05;
  letter-spacing: 0.02em;
  padding-bottom: 5px;
  background-image: linear-gradient(var(--gold), var(--gold));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 2px;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.32);
}
.brand__sep { color: rgba(212, 175, 55, 0.55); font-size: clamp(16px, 2.6vw, 28px); line-height: 1; }
.brand__tag {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(11px, 1.5vw, 14px);
  letter-spacing: 0.3em;
  color: var(--gold-hi);
  white-space: nowrap;
}

.masthead__rule {
  height: 1px;
  margin: 0 var(--gutter);
  background: linear-gradient(90deg, transparent 0%, var(--gold) 14%, var(--gold) 50%, var(--gold) 86%, transparent 100%);
  opacity: 0.62;
}

/* 导航行 */
.masthead__navrow {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--gutter);
  max-width: var(--shell);
  margin: 0 auto;
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 0;
  background: transparent;
  border: 0;
  color: var(--gold);
  cursor: pointer;
}
.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor;
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}
.nav-toggle__label {
  font-family: var(--font-head);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.86);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar,
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  background: var(--signal);
  box-shadow: 0 -6px 0 var(--signal), 0 6px 0 var(--signal);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__label { color: var(--gold-hi); }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(2px, 1.2vw, 10px);
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 13px clamp(7px, 1.3vw, 16px);
  color: rgba(255, 255, 255, 0.82);
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: color 0.18s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: clamp(7px, 1.3vw, 16px);
  right: clamp(7px, 1.3vw, 16px);
  bottom: 6px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.22s ease, background-color 0.22s ease;
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--gold-hi); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--gold); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); background: var(--gold-hi); }

/* 阅读进度 */
.masthead__progress {
  height: 2px;
  background: rgba(255, 255, 255, 0.09);
}
.masthead__progress[hidden] { display: none; }
.masthead__progress > span {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-hi) 100%);
}

/* 移动快捷条 */
.quick-dock { display: none; }
.quick-dock__link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 10px;
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  transition: background-color 0.18s ease, color 0.18s ease;
}
.quick-dock__link:last-child { border-right: 0; }
.quick-dock__link--signal { color: var(--gold-hi); }
.quick-dock__link--signal::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--signal);
  flex: 0 0 auto;
}
.quick-dock__link:hover,
.quick-dock__link:focus-visible { background: var(--field); color: var(--gold); }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  background: var(--midnight);
  color: rgba(255, 255, 255, 0.86);
  border-top: 1px solid rgba(212, 175, 55, 0.42);
  margin-top: var(--sp-lg);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ink-green) 0%, var(--gold) 50%, var(--ink-green) 100%);
  opacity: 0.9;
}
.footer__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 60px) var(--gutter) 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 40px);
}
.footer__brand { grid-column: span 1; }
.footer__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--white);
  letter-spacing: 0.02em;
}
.footer__gold { color: var(--gold); }
.footer__tagline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.5);
}
.footer__desc {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.68);
  max-width: 30ch;
}
.footer__seal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding: 6px 12px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: var(--gold-hi);
}
.footer-col__title {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.28);
  margin-bottom: 14px;
}
.footer-list { display: grid; gap: 10px; }
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.footer-link::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--gold);
  opacity: 0.72;
  flex: 0 0 auto;
}
.footer-link:hover,
.footer-link:focus-visible { color: var(--gold-hi); border-bottom-color: var(--gold); }
.footer-link--sm { font-size: 12px; }
.footer-link--sm::before { width: 4px; height: 4px; background: rgba(212, 175, 55, 0.6); }

.contact-line {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.13);
  font-size: 13.5px;
  line-height: 1.75;
}
.contact-line:first-of-type { padding-top: 0; }
.contact-line__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  padding-top: 3px;
  white-space: nowrap;
}
.contact-line__val { color: rgba(255, 255, 255, 0.86); overflow-wrap: anywhere; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
  padding: 2px 8px;
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold-hi);
  background: transparent;
  border: 1px solid rgba(212, 175, 55, 0.45);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.copy-btn:hover,
.copy-btn:focus-visible { background: rgba(212, 175, 55, 0.18); color: var(--white); border-color: var(--gold-hi); }
.copy-btn[data-copied="true"] { border-color: var(--signal); color: var(--signal); background: rgba(255, 107, 26, 0.12); }

.footer__bottom {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding: 16px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 22px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.58);
}
.footer__legal { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; }
.footer__icp {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.62);
}
.footer__note { font-size: 11.5px; line-height: 1.7; color: rgba(255, 255, 255, 0.45); }
.backtop {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  background: transparent;
  border: 1px solid rgba(212, 175, 55, 0.5);
  color: var(--gold-hi);
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.backtop:hover,
.backtop:focus-visible { background: var(--gold); border-color: var(--gold); color: var(--midnight); }

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

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.grid > * { grid-column: span 12; min-width: 0; }

.stack { display: grid; gap: var(--gap); }

.rule { height: 1px; border: 0; background: var(--line-color); margin: var(--sp-md) 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--ink-green);
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--gold); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-color);
  margin-bottom: var(--sp-md);
}
.section-head__title {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 900;
  letter-spacing: 0.01em;
}
.section-head__note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.data-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn--gold { background: var(--gold); border-color: var(--gold); color: var(--midnight); }
.btn--gold:hover, .btn--gold:focus-visible { background: var(--gold-hi); border-color: var(--gold-hi); }
.btn--signal { background: var(--signal); border-color: var(--signal); color: var(--white); }
.btn--signal:hover, .btn--signal:focus-visible { background: #ff8340; border-color: #ff8340; }
.btn--ghost { background: rgba(255, 255, 255, 0.04); border-color: rgba(212, 175, 55, 0.6); color: var(--gold-hi); }
.btn--ghost:hover, .btn--ghost:focus-visible { background: rgba(212, 175, 55, 0.18); color: var(--white); border-color: var(--gold-hi); }
.btn--outline:hover, .btn--outline:focus-visible { background: var(--ink-green); border-color: var(--ink-green); color: var(--gold-hi); }
.btn--block { width: 100%; }

/* 标签与筛选 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-color);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.tag--gold { border-color: rgba(212, 175, 55, 0.75); background: rgba(212, 175, 55, 0.16); color: #5a4610; }
.tag--signal { border-color: var(--signal); background: var(--signal); color: var(--white); }
.tag--muted { border-color: rgba(111, 116, 104, 0.45); color: var(--muted); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-color);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.04em;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.chip:hover,
.chip:focus-visible { border-color: var(--gold); background: rgba(212, 175, 55, 0.14); }
.chip[aria-pressed="true"] { background: var(--ink-green); border-color: var(--ink-green); color: var(--gold-hi); }

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.breadcrumbs__link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible { color: var(--ink-green); border-bottom-color: var(--gold); }
.breadcrumbs__sep { color: rgba(111, 116, 104, 0.7); }
.breadcrumbs__current { color: var(--muted); }

/* 卡片 */
.card {
  position: relative;
  display: block;
  padding: clamp(16px, 2vw, 24px);
  background: var(--paper);
  border: 1px solid var(--line-color);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.card:hover,
.card:focus-within {
  border-color: var(--gold);
  box-shadow: 4px 4px 0 rgba(212, 175, 55, 0.14);
}
.card__title {
  font-family: var(--font-head);
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 8px;
}
.card__body { font-size: 14.5px; line-height: 1.8; color: #33322c; }
.card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* 横向滚动榜单 */
.scroll-rail {
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(212, 175, 55, 0.7) rgba(0, 0, 0, 0.12);
  border-top: 1px solid var(--line-on-dark);
  border-bottom: 1px solid var(--line-on-dark);
}
.scroll-rail::-webkit-scrollbar { height: 6px; }
.scroll-rail::-webkit-scrollbar-track { background: rgba(0, 0, 0, 0.14); }
.scroll-rail::-webkit-scrollbar-thumb { background: rgba(212, 175, 55, 0.68); }
.scroll-rail__track { display: flex; min-width: max-content; }

/* 图片容器基础规则（页面阶段填入本地图片） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid rgba(212, 175, 55, 0.3);
  background-color: var(--field);
  background-image:
    radial-gradient(120% 82% at 50% 0%, rgba(212, 175, 55, 0.2), transparent 62%),
    linear-gradient(158deg, #143F35 0%, #0B3D2E 46%, #111111 100%);
  isolation: isolate;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(212, 175, 55, 0.13) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(212, 175, 55, 0.13) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: 0.55;
}
.media__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media__frame {
  position: absolute;
  inset: 10px;
  z-index: 3;
  border: 1px solid rgba(212, 175, 55, 0.34);
  pointer-events: none;
}
.media__caption {
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

/* 正文排版 */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  font-family: var(--font-head);
  font-size: clamp(20px, 2.5vw, 27px);
  font-weight: 900;
  line-height: 1.36;
  margin-top: 1.9em;
  padding-top: 0.7em;
  border-top: 1px solid var(--line-color);
}
.prose h3 {
  font-family: var(--font-head);
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 900;
  margin-top: 1.6em;
}
.prose ul, .prose ol { padding-left: 1.35em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.5em; }
.prose a {
  color: var(--ink-green);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: background-color 0.18s ease;
}
.prose a:hover,
.prose a:focus-visible { background: rgba(212, 175, 55, 0.2); }
.prose strong { font-weight: 700; }
.prose blockquote {
  padding: 14px 18px;
  border-left: 3px solid var(--gold);
  background: var(--paper);
  color: #33322c;
}
.prose code { font-family: var(--font-mono); font-size: 0.92em; }

/* 工具类 */
.visually-hidden {
  position: absolute !important;
  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;
}

/* ==========================================================================
   响应式
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: span 2; }
  .footer__desc { max-width: 46ch; }
}

@media (min-width: 760px) {
  .span-1 { grid-column: span 1; }
  .span-2 { grid-column: span 2; }
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-9 { grid-column: span 9; }
  .span-10 { grid-column: span 10; }
  .span-11 { grid-column: span 11; }
  .span-12 { grid-column: span 12; }
}

/* 手机与小型平板：折叠导航、底部快捷条 */
@media (max-width: 860px) {
  body { padding-bottom: 56px; }

  .masthead__navrow {
    justify-content: flex-start;
    min-height: 46px;
  }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 95;
    background: var(--midnight);
    border-top: 1px solid var(--line-on-dark);
    border-bottom: 1px solid var(--line-on-dark);
    padding: 6px var(--gutter) 14px;
    max-height: 72vh;
    overflow-y: auto;
  }
  .site-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid rgba(255, 255, 255, 0.09); }
  .nav-item:last-child { border-bottom: 0; }
  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 2px;
    font-size: 15px;
    letter-spacing: 0.1em;
  }
  .nav-link::after {
    left: 2px;
    right: auto;
    bottom: 9px;
    width: 34px;
  }
  .nav-link:hover::after,
  .nav-link:focus-visible::after { transform: scaleX(1); }

  .quick-dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 100;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--midnight);
    border-top: 1px solid rgba(212, 175, 55, 0.45);
    box-shadow: 0 -8px 20px rgba(0, 0, 0, 0.28);
  }

  .site-footer { margin-top: var(--sp-md); }
}

/* 小屏 */
@media (max-width: 620px) {
  .rail__tag { font-size: 10px; letter-spacing: 0.12em; }
  .rail-link { padding: 3px 9px; font-size: 11.5px; }
  .brand { flex-wrap: wrap; justify-content: center; row-gap: 2px; }
  .brand__sep { display: none; }
  .brand__tag { width: 100%; text-align: center; letter-spacing: 0.26em; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__brand { grid-column: span 1; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .prose { font-size: 15.5px; }
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .skip-link { transition: none; }
  .masthead__progress > span { transition: none; }
  .nav-link::after { transition: none; }
}