/* ==========================================================================
   银河官网中心 · 品牌通道 V3.1
   共享样式 /assets/site.css
   负责：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用按钮 / 面包屑 / 网格 / 基础组件
   ========================================================================== */

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

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

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

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

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

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

a { color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --space-void: #060A1C;
  --orbit-indigo: #101A3D;
  --nebula-violet: #2B1B52;
  --neon-cyan: #45E0D2;
  --neon-cyan-soft: #8AF0E4;
  --warm-gold: #F3B24C;
  --paper-cream: #F5EDDE;
  --ink-brown: #1C1420;
  --dust-gray: #9AA6C4;
  --signal-red: #E2603F;

  --text: #E6EBFA;
  --text-strong: #F2F6FF;
  --text-dim: var(--dust-gray);
  --line: rgba(154, 166, 196, 0.18);
  --line-cyan: rgba(69, 224, 210, 0.28);
  --line-gold: rgba(243, 178, 76, 0.38);

  /* 字体 */
  --font-head: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;

  /* 字号阶梯 12 / 13 / 15 / 17 / 21 / 28 / 40 / 64 */
  --fs-1: 12px;
  --fs-2: 13px;
  --fs-3: 15px;
  --fs-4: 17px;
  --fs-5: 21px;
  --fs-6: 28px;
  --fs-7: 40px;
  --fs-8: 64px;

  /* 布局 */
  --maxw: 1240px;
  --gutter: 48px;
  --radius-s: 14px;
  --radius-m: 22px;
  --radius-l: 28px;
  --radius-pill: 999px;
}

@media (max-width: 1024px) {
  :root { --gutter: 32px; }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--space-void);
  background-image:
    radial-gradient(900px 620px at 84% -12%, rgba(69, 224, 210, 0.13), transparent 62%),
    radial-gradient(1100px 760px at 6% 0%, rgba(43, 27, 82, 0.62), transparent 66%),
    radial-gradient(700px 520px at 50% 120%, rgba(226, 96, 63, 0.08), transparent 70%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-4);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.005em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text-strong);
  margin-bottom: 0.6em;
}

h1 { font-size: clamp(34px, 5.2vw, var(--fs-8)); }
h2 { font-size: clamp(26px, 3.4vw, var(--fs-7)); }
h3 { font-size: clamp(20px, 2.2vw, var(--fs-6)); }
h4 { font-size: var(--fs-5); }

p { margin-bottom: 1.2em; max-width: 72ch; }
p:last-child { margin-bottom: 0; }

a { text-decoration-thickness: 1px; text-underline-offset: 3px; }

::selection { background: rgba(69, 224, 210, 0.35); color: var(--text-strong); }

:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 4. 通用文本工具 ---------- */
.eyebrow {
  display: inline-block;
  font-size: var(--fs-1);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}

.lede {
  font-size: var(--fs-5);
  line-height: 1.62;
  color: #C9D3EC;
  max-width: 48ch;
}

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

.text-dim { color: var(--text-dim); }

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(154, 166, 196, 0.4), transparent);
}

/* ---------- 5. 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px var(--gutter);
}

.section--tight { padding-top: 36px; padding-bottom: 36px; }
.section--loose { padding-top: 112px; padding-bottom: 112px; }
.section--flush { padding-left: 0; padding-right: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.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-12 { grid-column: span 12; }

@media (max-width: 1024px) {
  .grid { gap: 20px; }
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-7, .span-8 { grid-column: span 12; }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; gap: 16px; }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: 1 / -1; }
}

/* 纵向星轨：页面主分区串联骨架 */
.track { position: relative; }

.track::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(69, 224, 210, 0.6), rgba(243, 178, 76, 0.35) 55%, rgba(43, 27, 82, 0.12));
  animation: orbitPulse 20s ease-in-out infinite;
}

.track-offset { padding-left: 34px; }

@media (max-width: 640px) {
  .track-offset { padding-left: 20px; }
}

@keyframes orbitPulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.6; }
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: var(--fs-3);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  color: #04141A;
  background: linear-gradient(120deg, var(--neon-cyan) 0%, var(--neon-cyan-soft) 58%, var(--warm-gold) 100%);
  box-shadow: 0 10px 26px rgba(69, 224, 210, 0.26);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(69, 224, 210, 0.38); }

.btn-ghost {
  color: #D6DEF5;
  background: rgba(16, 26, 61, 0.55);
  border-color: rgba(154, 166, 196, 0.35);
}

.btn-ghost:hover { border-color: var(--line-cyan); color: var(--text-strong); }

/* ---------- 7. 页头：悬浮胶囊导航 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--warm-gold);
  color: var(--ink-brown);
  font-size: var(--fs-3);
  font-weight: 800;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus { top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 18px var(--gutter);
  background: linear-gradient(180deg, rgba(6, 10, 28, 0.94) 0%, rgba(6, 10, 28, 0.72) 62%, rgba(6, 10, 28, 0) 100%);
  transition: padding 0.28s ease, background 0.28s ease;
}

.site-header.is-scrolled {
  padding-top: 10px;
  padding-bottom: 10px;
  background: linear-gradient(180deg, rgba(6, 10, 28, 0.98) 0%, rgba(6, 10, 28, 0.9) 100%);
  box-shadow: 0 18px 40px rgba(2, 4, 12, 0.55);
}

.scroll-progress {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  z-index: 120;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-cyan-soft) 52%, var(--warm-gold));
  box-shadow: 0 0 14px rgba(69, 224, 210, 0.55);
  pointer-events: none;
}

.header-rail {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand-island {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 9px 20px 9px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(140deg, rgba(43, 27, 82, 0.92), rgba(16, 26, 61, 0.92));
  text-decoration: none;
  box-shadow: 0 10px 26px rgba(2, 4, 12, 0.45);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.brand-island:hover { border-color: rgba(69, 224, 210, 0.6); transform: translateY(-1px); }

.brand-mark {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 30%, var(--warm-gold) 0 16%, transparent 17%),
    conic-gradient(from 210deg, var(--neon-cyan), var(--nebula-violet) 55%, var(--orbit-indigo) 100%);
  box-shadow: 0 0 0 1px rgba(69, 224, 210, 0.45), 0 0 18px rgba(69, 224, 210, 0.35);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }

.brand-name {
  font-family: var(--font-head);
  font-size: var(--fs-3);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text-strong);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.nav-island {
  display: flex;
  flex: 1 1 auto;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(16, 26, 61, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-item { display: block; }

.nav-link {
  display: block;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-2);
  font-weight: 600;
  color: #C9D3EC;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.nav-link:hover { color: var(--text-strong); background: rgba(69, 224, 210, 0.12); }

.nav-link[aria-current="page"] {
  color: #04141A;
  background: linear-gradient(120deg, var(--neon-cyan), var(--neon-cyan-soft));
  box-shadow: 0 0 18px rgba(69, 224, 210, 0.45);
}

.nav-aside { display: none; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.mono-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-gold);
  background: rgba(243, 178, 76, 0.1);
  color: var(--warm-gold);
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.mono-badge--lg { font-size: var(--fs-2); padding: 4px 10px; }

.ghost-link {
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  border: 1px dashed rgba(154, 166, 196, 0.38);
  color: #C9D3EC;
  font-size: var(--fs-2);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.ghost-link:hover { color: var(--text-strong); border-color: var(--line-cyan); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cyan);
  background: rgba(16, 26, 61, 0.85);
  color: var(--text-strong);
  font-size: var(--fs-2);
  font-weight: 700;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(69, 224, 210, 0.6);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--neon-cyan);
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.nav-toggle-label { letter-spacing: 0.08em; }

@media (max-width: 1180px) {
  .header-actions .ghost-link { display: none; }
}

@media (max-width: 1024px) {
  .header-actions .mono-badge { display: none; }
}

/* 移动 / 平板：导航变抽屉面板 */
@media (max-width: 960px) {
  .site-header { padding: 12px var(--gutter); }

  .header-actions { display: none; }

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

  .brand-island { padding: 8px 16px 8px 10px; }
  .brand-mark { width: 24px; height: 24px; }
  .brand-name { font-size: var(--fs-2); }

  .nav-island {
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    top: 78px;
    display: block;
    flex: none;
    padding: 16px;
    border-radius: var(--radius-l);
    border: 1px solid var(--line-cyan);
    background: linear-gradient(160deg, rgba(16, 26, 61, 0.99), rgba(43, 27, 82, 0.98));
    box-shadow: 0 30px 64px rgba(2, 4, 12, 0.66);
    max-height: calc(100vh - 108px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(0.985);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .nav-island[data-open="true"] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .nav-list {
    display: block;
    padding: 0;
    border: 0;
    background: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-item + .nav-item { margin-top: 6px; }

  .nav-link {
    padding: 13px 16px;
    border-radius: var(--radius-s);
    background: rgba(6, 10, 28, 0.5);
    font-size: var(--fs-4);
    font-weight: 700;
  }

  .nav-aside {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }

  .nav-aside .mono-badge { align-self: flex-start; }
  .nav-aside .ghost-link { text-align: center; }
  .nav-aside .btn { width: 100%; }
}

/* ---------- 8. 页脚：轨道收束 ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  padding: 0 var(--gutter) 40px;
  background: linear-gradient(180deg, rgba(6, 10, 28, 0) 0%, rgba(16, 26, 61, 0.85) 26%, rgba(43, 27, 82, 0.58) 100%);
  color: #D8E0F6;
}

.footer-orbit {
  width: 100%;
  max-width: var(--maxw);
  height: 1px;
  margin: 0 auto 44px;
  background: linear-gradient(90deg, transparent, rgba(69, 224, 210, 0.7) 30%, rgba(243, 178, 76, 0.6) 68%, transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(120px, 1fr));
  gap: 40px 28px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer-brand-col { max-width: 42ch; }

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.footer-logo-text {
  font-family: var(--font-head);
  font-size: var(--fs-5);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.footer-tagline {
  margin: 16px 0 0;
  font-size: var(--fs-3);
  line-height: 1.72;
  color: var(--text-dim);
}

.footer-address {
  margin: 10px 0 0;
  font-size: var(--fs-2);
  line-height: 1.7;
  color: rgba(154, 166, 196, 0.78);
}

.footer-version {
  margin: 18px 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-2);
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.footer-col-title {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: var(--fs-1);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.footer-list { display: grid; gap: 10px; }

.footer-link {
  display: inline-block;
  font-size: var(--fs-3);
  color: #C7D2EC;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-link:hover { color: var(--text-strong); border-bottom-color: rgba(69, 224, 210, 0.6); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 26px;
  width: 100%;
  max-width: var(--maxw);
  margin: 46px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-2);
  color: var(--text-dim);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: rgba(154, 166, 196, 0.9);
}

.footer-copy { color: rgba(154, 166, 196, 0.82); }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.footer-contact-item { white-space: nowrap; }

.footer-contact-sep { color: rgba(243, 178, 76, 0.7); }

.to-top {
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cyan);
  background: rgba(16, 26, 61, 0.7);
  color: var(--text-strong);
  font-size: var(--fs-2);
  font-weight: 700;
  transition: background 0.18s ease, transform 0.18s ease;
}

.to-top:hover { background: rgba(69, 224, 210, 0.16); transform: translateY(-2px); }

@media (max-width: 960px) {
  .site-footer { margin-top: 72px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 24px; }
  .footer-brand-col { grid-column: 1 / -1; max-width: none; }
  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-orbit { margin-bottom: 32px; }
}

/* ---------- 9. 内容组件 ---------- */
.card {
  padding: 24px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(43, 27, 82, 0.72), rgba(16, 26, 61, 0.86));
}

.island-card {
  position: relative;
  padding: 26px;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(150deg, rgba(43, 27, 82, 0.86), rgba(16, 26, 61, 0.94));
  box-shadow: 0 26px 60px rgba(2, 4, 12, 0.55);
}

.island-card--gold { border-color: var(--line-gold); }

.paper {
  padding: 32px;
  border-radius: var(--radius-m);
  background: var(--paper-cream);
  color: var(--ink-brown);
}

.paper h2, .paper h3, .paper h4 { color: var(--ink-brown); }
.paper a { color: #8A3A22; }

@media (max-width: 640px) {
  .paper { padding: 22px; }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid;
  font-size: var(--fs-1);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.status-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.status-ok { color: var(--neon-cyan); border-color: rgba(69, 224, 210, 0.45); background: rgba(69, 224, 210, 0.1); }
.status-warn { color: var(--signal-red); border-color: rgba(226, 96, 63, 0.5); background: rgba(226, 96, 63, 0.12); }
.status-fixed { color: var(--warm-gold); border-color: var(--line-gold); background: rgba(243, 178, 76, 0.1); }

/* 可展开内容组 */
.panel-group { border-top: 1px solid var(--line); }

.panel-trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-family: var(--font-head);
  font-size: var(--fs-4);
  font-weight: 700;
  text-align: left;
  transition: color 0.18s ease;
}

.panel-trigger:hover { color: var(--neon-cyan); }

.panel-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  color: var(--neon-cyan);
}

.panel-caret {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-left: auto;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.panel-trigger[aria-expanded="true"] .panel-caret { transform: rotate(225deg); }

.panel-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.2s ease;
}

.panel-body-inner {
  max-width: 68ch;
  padding: 6px 4px 22px;
  font-size: var(--fs-4);
  line-height: 1.75;
  color: var(--text-dim);
}

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  font-size: var(--fs-2);
  color: var(--text-dim);
}

.breadcrumbs li { display: flex; align-items: center; gap: 8px; }
.breadcrumbs a { color: #C7D2EC; text-decoration: none; }
.breadcrumbs a:hover { color: var(--neon-cyan); }
.breadcrumbs [aria-current="page"] { color: var(--warm-gold); }
.crumb-sep { color: rgba(154, 166, 196, 0.5); }

/* 图片容器基础规则 */
.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(150deg, rgba(43, 27, 82, 0.9), rgba(6, 10, 28, 0.96));
}

.img-frame img,
.img-frame svg,
.img-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame--wide { aspect-ratio: 16 / 9; }
.img-frame--tall { aspect-ratio: 4 / 5; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--banner { aspect-ratio: 21 / 9; }

.img-caption {
  margin-top: 10px;
  font-size: var(--fs-2);
  line-height: 1.65;
  color: var(--text-dim);
}

/* 显现 */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

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

/* ---------- 10. 无障碍与降级 ---------- */
@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;
  }

  .reveal { opacity: 1; transform: none; }
  .track::before { animation: none; opacity: 0.5; }
}