/* ============================================================
   东升国际 · /assets/site.css
   夜航港口档案系统：固定动作窄栏 + 双端导航 + 编号章节
   ============================================================ */

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

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

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

ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- Tokens ---------- */
:root {
  --deep-sea: #0A1F33;
  --night-blue: #123A5A;
  --deck-blue: #1E4A6B;
  --coral: #FF6B3D;
  --amber: #E8A93C;
  --celadon: #52A08E;
  --rock: #8A97A3;
  --cream: #F2ECE0;
  --clay: #C2603C;
  --ink: #061420;

  --rail-w: 88px;
  --rail-w-compact: 60px;
  --maxw: 1280px;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif SC", "Songti SC", SimSun, Georgia, serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shadow-card: 0 18px 40px -28px rgba(0, 0, 0, .95);
  --shadow-lift: 0 28px 52px -32px rgba(0, 0, 0, 1);
}

/* ---------- Base ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: rgba(242, 236, 224, .9);
  background-color: var(--deep-sea);
  background-image:
    radial-gradient(1100px 620px at 92% -8%, rgba(30, 74, 107, .58), transparent 68%),
    radial-gradient(900px 520px at -6% 108%, rgba(18, 58, 90, .5), transparent 70%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-w);
    transition: padding-left .3s var(--ease);
  }
  html[data-rail="compact"] body { padding-left: var(--rail-w-compact); }
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -.012em;
  color: var(--cream);
}

h1 { font-size: clamp(30px, 5.2vw, 54px); }
h2 { font-size: clamp(24px, 3.4vw, 34px); }
h3 { font-size: clamp(19px, 2.2vw, 22px); }
h4 { font-size: 18px; }

p + p { margin-top: 1em; }
strong { color: var(--cream); font-weight: 700; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.skip-link {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-160%);
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--coral);
  color: #10202c;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  transition: transform .22s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 动作窄栏 ---------- */
.action-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 80;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 18px 8px 22px;
  background: linear-gradient(180deg, var(--night-blue) 0%, #0B2437 55%, var(--ink) 100%);
  border-right: 1px solid var(--deck-blue);
  transition: width .3s var(--ease);
}

.action-rail::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: -1px;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(232, 169, 60, .55) 45%, transparent);
}

html[data-rail="compact"] .action-rail { width: var(--rail-w-compact); }
html[data-rail="compact"] .rail-title,
html[data-rail="compact"] .rail-label,
html[data-rail="compact"] .rail-count { display: none; }
html[data-rail="compact"] .rail-actions { gap: 8px; }

.rail-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  flex: none;
  border: 1px solid var(--deck-blue);
  border-radius: 13px;
  color: var(--cream);
  transition: border-color .22s, background-color .22s;
}
.rail-toggle:hover { border-color: var(--amber); background: rgba(18, 58, 90, .7); }
.rail-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: width .24s var(--ease), background-color .24s;
}
.rail-toggle-bar:last-of-type { width: 11px; background: var(--coral); }
.rail-toggle[aria-expanded="true"] .rail-toggle-bar:last-of-type { width: 18px; }

.rail-title {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--rock);
  writing-mode: vertical-rl;
  margin: 4px 0 2px;
}

.rail-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.rail-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 4px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: var(--rock);
  transition: background-color .22s, color .22s, border-color .22s, transform .22s var(--ease);
}
.rail-action:hover,
.rail-action:focus-visible {
  background: rgba(30, 74, 107, .65);
  border-color: var(--deck-blue);
  color: var(--cream);
  transform: translateY(-2px);
}
.rail-action-export .rail-icon { color: var(--amber); }

.rail-icon { font-size: 15px; line-height: 1; color: var(--coral); }
.rail-label {
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  letter-spacing: .02em;
}
.rail-count {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--celadon);
}

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: linear-gradient(180deg, rgba(6, 20, 32, .97), rgba(10, 31, 51, .93));
  border-bottom: 1px solid rgba(30, 74, 107, .9);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
}

.header-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 40px);
}

.header-bar .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  flex: none;
}
.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
  color: var(--amber);
}
.brand-mark svg { width: 100%; height: 100%; overflow: visible; }
.brand-text { display: flex; flex-direction: column; line-height: 1.12; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: .07em;
  color: var(--cream);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .3em;
  color: var(--rock);
}

.main-nav { display: block; }
.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 20px);
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .045em;
  color: var(--rock);
  border-bottom: 2px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--cream); border-bottom-color: var(--coral); }
.nav-link[aria-current="page"] { color: var(--amber); border-bottom-color: var(--amber); }

@media (min-width: 900px) {
  .nav-link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: -11px;
    top: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--celadon);
    transform: translateY(-50%);
    box-shadow: 0 0 0 3px rgba(82, 160, 142, .2);
  }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
  width: 46px;
  height: 44px;
  flex: none;
  padding: 13px 12px;
  border: 1px solid var(--deck-blue);
  border-radius: 12px;
  color: var(--cream);
  transition: border-color .22s, background-color .22s;
}
.nav-toggle:hover { border-color: var(--coral); background: rgba(18, 58, 90, .65); }
.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(6, 20, 32, .68);
  opacity: 0;
  pointer-events: none;
  transition: opacity .26s var(--ease);
}

/* ---------- 状态带 ---------- */
.status-band {
  background: var(--night-blue);
  border-top: 1px solid rgba(30, 74, 107, .75);
}
.status-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 38px;
  overflow-x: auto;
  scrollbar-width: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--rock);
}
.status-inner::-webkit-scrollbar { display: none; }

.status-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.status-num { color: var(--amber); font-weight: 700; }
.status-num-coral { color: var(--coral); }
.status-sep { flex: none; width: 1px; height: 15px; background: var(--deck-blue); }
.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(82, 160, 142, .22);
}
.status-item-live { color: rgba(242, 236, 224, .78); }

/* ---------- 阅读进度 ---------- */
.scroll-progress {
  height: 2px;
  background: rgba(30, 74, 107, .6);
  overflow: hidden;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--celadon), var(--amber) 55%, var(--coral));
}

/* ---------- 移动导航 ---------- */
@media (max-width: 899px) {
  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    width: min(330px, 86vw);
    padding: 96px 22px 32px;
    overflow-y: auto;
    background: linear-gradient(160deg, var(--night-blue) 0%, #0B2437 55%, var(--ink) 100%);
    border-left: 1px solid var(--deck-blue);
    transform: translateX(101%);
    transition: transform .3s var(--ease);
  }
  .main-nav[data-open] { transform: translateX(0); }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item + .nav-item { border-top: 1px solid rgba(30, 74, 107, .55); }
  .nav-link {
    display: block;
    padding: 15px 6px;
    font-size: 17px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .nav-link:hover,
  .nav-link:focus-visible { border-bottom-color: transparent; border-left-color: var(--coral); padding-left: 12px; }
  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--amber);
    padding-left: 12px;
  }

  .nav-scrim { display: block; }
  html.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  html.nav-open { overflow: hidden; }
}

@media (max-width: 1023px) {
  .action-rail { display: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  background: var(--ink);
  border-top: 1px solid rgba(30, 74, 107, .9);
  color: var(--rock);
  font-size: 15px;
  line-height: 1.75;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--celadon), var(--amber) 40%, var(--coral) 66%, transparent);
  opacity: .9;
}

.footer-inner { padding-top: clamp(40px, 5vw, 64px); padding-bottom: 30px; }

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(30, 74, 107, .7);
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-mark { width: 30px; height: 30px; }
.footer-note { max-width: 46ch; font-size: 14.5px; color: var(--rock); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.05fr 1.6fr;
  gap: clamp(20px, 3vw, 46px);
  padding: clamp(28px, 4vw, 46px) 0;
}
.footer-block { min-width: 0; }

.footer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--amber);
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  display: inline-block;
  color: rgba(242, 236, 224, .84);
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer-links a:hover { color: var(--coral); transform: translateX(3px); }

.footer-meta { display: flex; flex-direction: column; gap: 12px; }
.footer-meta li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.footer-key { flex: none; min-width: 68px; font-size: 13px; color: var(--rock); }
.footer-val {
  color: rgba(242, 236, 224, .92);
  font-size: 14.5px;
  word-break: break-word;
  font-family: var(--font-mono);
  letter-spacing: .02em;
}
.footer-hint {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--clay);
  font-size: 13.5px;
  color: var(--rock);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid rgba(30, 74, 107, .7);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a { font-size: 14px; color: var(--rock); transition: color .2s; }
.footer-legal a:hover { color: var(--coral); }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--rock);
}

@media (max-width: 1023px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-block-wide { grid-column: span 2; }
}
@media (max-width: 639px) {
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-block-wide { grid-column: span 1; }
}

/* ---------- 容器与栅格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: clamp(18px, 4vw, 48px);
  padding-right: clamp(18px, 4vw, 48px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 28px);
}
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

@media (max-width: 1023px) {
  .col-4, .col-5 { grid-column: span 6; }
  .col-7, .col-8 { grid-column: span 12; }
}
@media (max-width: 639px) {
  .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 12; }
}

/* ---------- 章节 ---------- */
.section {
  position: relative;
  padding: clamp(44px, 7vw, 92px) 0;
}
.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.section-num {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .05em;
  color: var(--amber);
}
.section-num::after {
  content: "";
  flex: 1;
  max-width: clamp(60px, 14vw, 190px);
  height: 1px;
  background: linear-gradient(90deg, rgba(232, 169, 60, .85), rgba(232, 169, 60, 0));
}
.section-title { color: var(--cream); }
.section-sub {
  max-width: 62ch;
  font-size: 16.5px;
  color: var(--rock);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--celadon);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--celadon);
  border-radius: 2px;
  transform: rotate(45deg);
}

.lede {
  max-width: 60ch;
  font-size: clamp(17px, 1.6vw, 19.5px);
  line-height: 1.85;
  color: rgba(242, 236, 224, .9);
}

.divider {
  height: 1px;
  width: 100%;
  border: 0;
  margin: clamp(24px, 4vw, 48px) 0;
  background: linear-gradient(90deg, transparent, rgba(30, 74, 107, .95), transparent);
}

/* ---------- 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .05em;
  cursor: pointer;
  transition: transform .2s var(--ease), background-color .2s, color .2s, border-color .2s, box-shadow .2s;
}
.btn-primary {
  background: var(--coral);
  color: #10202c;
  box-shadow: 0 16px 32px -20px rgba(255, 107, 61, .95);
}
.btn-primary:hover { background: #ff7f57; transform: translateY(-2px); }
.btn-amber { background: var(--amber); color: #2B1D05; }
.btn-amber:hover { background: #f3ba58; transform: translateY(-2px); }
.btn-ghost {
  background: rgba(18, 58, 90, .45);
  border-color: var(--deck-blue);
  color: var(--cream);
}
.btn-ghost:hover { border-color: var(--coral); color: var(--coral); transform: translateY(-2px); }
.btn-sm { padding: 9px 17px; font-size: 13px; }
.btn-block { display: flex; width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--coral);
}
.link-arrow::after { content: "→"; transition: transform .22s var(--ease); }
.link-arrow:hover::after { transform: translateX(5px); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  border: 1px solid var(--deck-blue);
  border-radius: 999px;
  background: rgba(18, 58, 90, .5);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--rock);
  white-space: nowrap;
}
.tag-amber { border-color: rgba(232, 169, 60, .55); color: var(--amber); }
.tag-coral { border-color: rgba(255, 107, 61, .55); color: var(--coral); }
.tag-clay { border-color: rgba(194, 96, 60, .6); color: #E08A63; }
.tag-celadon { border-color: rgba(82, 160, 142, .55); color: var(--celadon); }
.tag-celadon::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- 资料卡 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(18px, 2.4vw, 28px);
  background: linear-gradient(155deg, rgba(18, 58, 90, .92), rgba(10, 31, 51, .97));
  border: 1px solid rgba(30, 74, 107, .9);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform .26s var(--ease), border-color .26s, box-shadow .26s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(232, 169, 60, .55);
  box-shadow: var(--shadow-lift);
}
.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}
.card-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.42;
  color: var(--cream);
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--rock);
}
.card-body { font-size: 16px; color: rgba(242, 236, 224, .78); }
.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed rgba(138, 151, 163, .3);
}

/* ---------- 航线图形 ---------- */
.route-line {
  width: 100%;
  height: auto;
  overflow: visible;
  color: var(--celadon);
}
.route-line path,
.route-line line,
.route-line polyline {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 6 8;
  animation: route-flow 9s linear infinite;
}
.route-line circle,
.route-line .route-line-node {
  fill: var(--amber);
  stroke: none;
}
@keyframes route-flow {
  to { stroke-dashoffset: -140; }
}

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(30, 74, 107, .85);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--night-blue), var(--ink));
}
.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 78% 6%, rgba(255, 107, 61, .18), transparent 62%);
}
.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-3x4 { aspect-ratio: 3 / 4; }
.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--rock);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--rock);
  padding: 20px 0 0;
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin: 0 9px;
  color: var(--deck-blue);
}
.breadcrumb-item a { color: var(--rock); transition: color .2s; }
.breadcrumb-item a:hover { color: var(--coral); }
.breadcrumb-item [aria-current="page"] { color: var(--amber); }

/* ---------- 显现动效 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .route-line path,
  .route-line line,
  .route-line polyline {
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }
  html.js [data-reveal] { opacity: 1; transform: none; }
}