/* ============================================================
   /assets/site.css — 银河娱乐中心 共享外壳与基础组件
   星图档案馆：深空靛蓝底 · 银河紫 / 星云粉光晕 · 青金锚点
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --space-950: #05070E;
  --indigo-900: #0B1024;
  --indigo-800: #141B38;
  --star-white: #F5F7FF;
  --mist: #A9B3D6;
  --cyan-gold: #54F2D0;
  --galaxy-purple: #8B5CF6;
  --nebula-pink: #F472B6;
  --line-blue: #2A3355;
  --deadline-amber: #FFB86B;
  --signal-green: #7CFFB2;
  --ink: #041010;

  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, "Courier New", monospace;

  --wrap-max: 1440px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --dur: 0.18s;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --cut: 20px;
  --cut-sm: 8px;
}

/* ---------- 2. 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, p, figure, blockquote, dl, dd { margin: 0; }

ul[class],
ol[class] { list-style: none; margin: 0; padding: 0; }

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

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

button { border: 0; background: none; }

a { color: inherit; }

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

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

main [id] { scroll-margin-top: 7.5rem; }

/* ---------- 3. 中文排版与背景 ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 560px at 12% -6%, rgba(139, 92, 246, 0.18), transparent 62%),
    radial-gradient(900px 480px at 96% 2%, rgba(244, 114, 182, 0.1), transparent 66%),
    radial-gradient(800px 600px at 70% 100%, rgba(84, 242, 208, 0.05), transparent 70%),
    var(--space-950);
  color: var(--star-white);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--star-white);
  font-weight: 600;
}

h1 { font-size: clamp(2.4rem, 6vw, 5.6rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.4rem, 2.4vw, 2.2rem); }
h3 { font-size: clamp(1.125rem, 1.6vw, 1.375rem); letter-spacing: -0.01em; }

p { text-wrap: pretty; }

a { text-decoration-thickness: 1px; text-underline-offset: 0.25em; }

/* ---------- 4. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.6vw, 2.25rem);
  grid-template-columns: minmax(0, 1fr);
}

.grid--split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.grid--wide-narrow { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }
.grid--narrow-wide { grid-template-columns: minmax(0, 3fr) minmax(0, 7fr); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.72rem 1.2rem;
  border: 1px solid var(--line-blue);
  background: rgba(20, 27, 56, 0.6);
  color: var(--star-white);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.btn--primary {
  background: var(--cyan-gold);
  border-color: var(--cyan-gold);
  color: var(--ink);
  box-shadow: 0 0 0 rgba(84, 242, 208, 0);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #7CF8DF;
  border-color: #7CF8DF;
  box-shadow: 0 0 26px rgba(84, 242, 208, 0.45);
}

.btn--ghost {
  background: rgba(11, 16, 36, 0.55);
  border-color: var(--line-blue);
  color: var(--mist);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--star-white);
  border-color: var(--cyan-gold);
  background: rgba(20, 27, 56, 0.9);
}

.btn--sm { padding: 0.5rem 0.85rem; font-size: 0.6875rem; letter-spacing: 0.1em; }

/* ---------- 6. 标签 / 状态 / 元信息 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line-blue);
  background: rgba(20, 27, 56, 0.68);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  line-height: 1.5;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.status-dot {
  display: inline-block;
  flex: none;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--signal-green);
  box-shadow: 0 0 0 3px rgba(124, 255, 178, 0.14);
}

.status-dot--amber {
  background: var(--deadline-amber);
  box-shadow: 0 0 0 3px rgba(255, 184, 107, 0.16);
}

/* ---------- 7. 版式组件 ---------- */
.section-head {
  display: grid;
  gap: 0.45rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.section-head__kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.26em;
  color: var(--cyan-gold);
  margin: 0;
}

.prose {
  max-width: 64ch;
  color: rgba(245, 247, 255, 0.86);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.7em; margin-bottom: 0.5em; }
.prose ul, .prose ol { margin-block: 1em; padding-left: 1.25em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.35em; }
.prose a { color: var(--cyan-gold); }

.vlabel {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.32em;
  color: var(--mist);
  text-transform: uppercase;
}

.notch {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  background: linear-gradient(158deg, rgba(20, 27, 56, 0.95), rgba(11, 16, 36, 0.9));
  border: 1px solid var(--line-blue);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.rule-orbit {
  position: relative;
  height: 1px;
  margin-block: clamp(2rem, 5vw, 4rem);
  background: linear-gradient(90deg, transparent, var(--line-blue) 12%, var(--line-blue) 88%, transparent);
}

.rule-orbit::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 6%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan-gold);
  box-shadow: 0 0 10px rgba(84, 242, 208, 0.85);
  animation: orbit-drift 9s linear infinite;
}

@keyframes orbit-drift {
  0% { left: 6%; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { left: 94%; opacity: 0; }
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { padding-block: 1.25rem 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.breadcrumb__item { display: flex; align-items: center; gap: 0.5rem; }
.breadcrumb__sep { color: rgba(42, 51, 85, 1); }
.breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumb__link:hover { color: var(--cyan-gold); border-bottom-color: var(--cyan-gold); }
.breadcrumb__item [aria-current="page"] { color: var(--star-white); }

/* ---------- 9. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(155deg, var(--indigo-800), var(--space-950) 72%);
  border: 1px solid var(--line-blue);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: var(--media-ratio, 16 / 10);
  object-fit: cover;
  background:
    radial-gradient(circle at 30% 24%, rgba(139, 92, 246, 0.38), transparent 58%),
    radial-gradient(circle at 76% 72%, rgba(84, 242, 208, 0.18), transparent 54%),
    var(--indigo-900);
  filter: saturate(0.92) contrast(1.05);
}

.media-frame--tall .media-frame__img { aspect-ratio: 3 / 4; }
.media-frame--wide .media-frame__img { aspect-ratio: 21 / 9; }
.media-frame--square .media-frame__img { aspect-ratio: 1 / 1; }

.media-frame__body {
  padding: 0.9rem 1.1rem;
  border-top: 1px solid rgba(42, 51, 85, 0.85);
}

.media-frame__caption {
  margin: 0.55rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 10. Skip link ---------- */
.site-skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  padding: 0.6rem 1rem;
  background: var(--cyan-gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: top var(--dur) var(--ease);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.site-skip:focus { top: 0.75rem; }

/* ---------- 11. 命令栏头部 ---------- */
.cmdbar {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(5, 7, 14, 0.97), rgba(11, 16, 36, 0.93));
  border-bottom: 1px solid var(--line-blue);
  color: var(--star-white);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
}

.cmdbar__progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: rgba(42, 51, 85, 0.55);
  pointer-events: none;
}

.cmdbar__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--galaxy-purple), var(--cyan-gold));
  box-shadow: 0 0 12px rgba(84, 242, 208, 0.55);
  transition: width 0.1s linear;
}

.cmdbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 66px;
}

.cmdbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
  text-decoration: none;
  color: var(--star-white);
}

.cmdbar__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: linear-gradient(140deg, var(--cyan-gold) 0%, #2BC9CE 55%, var(--galaxy-purple) 100%);
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
  transition: filter var(--dur) var(--ease);
}

.cmdbar__brand:hover .cmdbar__mark { filter: brightness(1.12); }

.cmdbar__mark-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--space-950);
  box-shadow: 0 0 0 3px rgba(5, 7, 14, 0.22);
}

.cmdbar__brandtext { display: grid; gap: 2px; line-height: 1.1; }

.cmdbar__brandline {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--star-white);
}

.cmdbar__brandsub {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.cmdbar__navwrap {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.6vw, 1.5rem);
}

.cmdbar__list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cmdbar__item { position: relative; }

.cmdbar__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.55rem 0.55rem;
  color: var(--mist);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.cmdbar__link::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 0.2rem;
  height: 1px;
  background: var(--cyan-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.cmdbar__link:hover { color: var(--star-white); }
.cmdbar__link:hover::after { transform: scaleX(1); }

.cmdbar__link[aria-current="page"] { color: var(--star-white); }
.cmdbar__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--cyan-gold), var(--galaxy-purple));
}

.cmdbar__link-index {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  color: rgba(169, 179, 214, 0.55);
}

.cmdbar__link[aria-current="page"] .cmdbar__link-index { color: var(--cyan-gold); }

.cmdbar__cta { flex: none; }

.cmdbar__toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.7rem;
  background: rgba(20, 27, 56, 0.7);
  border: 1px solid var(--line-blue);
  color: var(--star-white);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
}

.cmdbar__toggle[aria-expanded="true"] { border-color: var(--cyan-gold); color: var(--cyan-gold); }

.cmdbar__toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background var(--dur) var(--ease);
}

.cmdbar__toggle-bars::before,
.cmdbar__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}

.cmdbar__toggle-bars::before { top: -6px; }
.cmdbar__toggle-bars::after { top: 6px; }

.cmdbar__toggle[aria-expanded="true"] .cmdbar__toggle-bars { background: transparent; }
.cmdbar__toggle[aria-expanded="true"] .cmdbar__toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.cmdbar__toggle[aria-expanded="true"] .cmdbar__toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

.cmdbar__status {
  position: relative;
  border-top: 1px solid rgba(42, 51, 85, 0.7);
  background: rgba(11, 16, 36, 0.55);
}

.cmdbar__status-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  min-height: 28px;
  padding-block: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.cmdbar__status-dot {
  flex: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--signal-green);
  box-shadow: 0 0 0 3px rgba(124, 255, 178, 0.12);
  animation: pulse-dot 3.6s ease-in-out infinite;
}

.cmdbar__status-path { color: var(--star-white); }

.cmdbar__status-text {
  margin-left: auto;
  color: rgba(169, 179, 214, 0.8);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

/* ---------- 12. 页脚 ---------- */
.sitefoot {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, rgba(11, 16, 36, 0.7), rgba(5, 7, 14, 1));
  border-top: 1px solid var(--line-blue);
  color: var(--mist);
  font-size: 0.875rem;
}

.sitefoot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--galaxy-purple), var(--cyan-gold), transparent);
  opacity: 0.7;
}

.sitefoot__top {
  display: grid;
  grid-template-columns: minmax(250px, 4fr) minmax(0, 8fr);
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.sitefoot__brand { min-width: 0; }

.sitefoot__brandline {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: -0.03em;
  color: var(--star-white);
  line-height: 1.1;
}

.sitefoot__brandsub {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.sitefoot__orbit {
  position: relative;
  width: 118px;
  height: 118px;
  margin-block: 1.5rem;
  border-radius: 50%;
  border: 1px dashed rgba(42, 51, 85, 0.95);
}

.sitefoot__orbit::before {
  content: "";
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.sitefoot__orbit::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--cyan-gold);
  box-shadow: 0 0 12px rgba(84, 242, 208, 0.85);
  animation: orbit-spin 10s linear infinite;
}

@keyframes orbit-spin {
  from { transform: rotate(0deg) translateY(-56px); }
  to { transform: rotate(360deg) translateY(-56px); }
}

.sitefoot__copy { margin-top: 0.25rem; }
.sitefoot__copy[data-state="copied"] {
  border-color: var(--signal-green);
  color: var(--signal-green);
}
.sitefoot__copy[data-state="failed"] {
  border-color: var(--deadline-amber);
  color: var(--deadline-amber);
}

.sitefoot__columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
  min-width: 0;
}

.sitefoot__col { min-width: 0; }

.sitefoot__title {
  margin-bottom: 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line-blue);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--star-white);
}

.sitefoot__list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sitefoot__link {
  display: inline-block;
  color: var(--mist);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.sitefoot__link:hover { color: var(--cyan-gold); transform: translateX(2px); }

.sitefoot__lines {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--mist);
}

.sitefoot__line { margin: 0; overflow-wrap: anywhere; }

.sitefoot__icp {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.sitefoot__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line-blue);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.sitefoot__legal { margin: 0; color: var(--star-white); }

.sitefoot__meta {
  margin: 0;
  max-width: 54ch;
  color: rgba(169, 179, 214, 0.78);
}

/* ---------- 13. 显现协议 ---------- */
.reveal-armed [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) and (min-width: 900px) {
  .cmdbar__link { padding: 0.5rem 0.35rem; font-size: 0.75rem; }
  .cmdbar__link-index { display: none; }
  .cmdbar__brandsub { font-size: 0.5625rem; }
}

@media (max-width: 960px) {
  .sitefoot__top { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .sitefoot__orbit { width: 96px; height: 96px; margin-block: 1.25rem; }
  .sitefoot__orbit::after { animation-duration: 12s; }
}

@media (max-width: 899px) {
  .cmdbar__inner { min-height: 58px; }
  .cmdbar__brandsub { display: none; }
  .cmdbar__toggle { display: inline-flex; }

  .cmdbar__navwrap {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem var(--gutter) 1.25rem;
    background: linear-gradient(180deg, rgba(11, 16, 36, 0.99), rgba(5, 7, 14, 0.99));
    border-bottom: 1px solid var(--line-blue);
    box-shadow: 0 24px 48px rgba(5, 7, 14, 0.72);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    overscroll-behavior: contain;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s linear;
  }

  .cmdbar__navwrap[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .cmdbar__list { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .cmdbar__item { border-bottom: 1px solid rgba(42, 51, 85, 0.65); }

  .cmdbar__link {
    display: flex;
    width: 100%;
    padding: 0.85rem 0.2rem;
    font-size: 0.9375rem;
    justify-content: flex-start;
  }

  .cmdbar__link::after { display: none; }
  .cmdbar__link[aria-current="page"] { color: var(--cyan-gold); }
  .cmdbar__link-index { width: 1.7em; font-size: 0.625rem; }

  .cmdbar__cta { width: 100%; margin-top: 1rem; justify-content: center; }

  .cmdbar__status-text { display: none; }
  .cmdbar__status-inner { font-size: 0.5625rem; letter-spacing: 0.12em; }

  .grid--split,
  .grid--wide-narrow,
  .grid--narrow-wide { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 540px) {
  .sitefoot__columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sitefoot__bottom { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .sitefoot__meta { max-width: none; }
  .vlabel { writing-mode: horizontal-tb; letter-spacing: 0.2em; }
}

/* ---------- 15. 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;
    scroll-behavior: auto !important;
  }

  .rule-orbit::before,
  .sitefoot__orbit::after,
  .cmdbar__status-dot { animation: none !important; }

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