:root {
  --color-surface: #fdfefd;
  --color-surface-alt: #f3f4f3;
  --color-surface-deep: #e4e6e4;
  --color-ink: #2f372f;
  --color-ink-soft: #586558;
  --color-ink-muted: #738273;
  --color-line: #d8dad8;
  --color-primary: #078906;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #dbeeda;
  --color-accent: #c70ae5;
  --color-accent-ink: #ffffff;
  --color-highlight: #f3d2f9;
  --color-focus: #c100e0;
  --color-contrast-surface: #132c13;
  --color-contrast-ink: #e4e7e4;
  --color-contrast-line: #415541;
  --color-contrast-accent: #de45f7;
  --overlay-scrim: linear-gradient(180deg, rgba(19, 44, 19, 0.35) 0%, rgba(19, 44, 19, 0.72) 55%, rgba(19, 44, 19, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 8.3px;
  --text-sm: 13.4px;
  --text-base: 17px;
  --text-lg: 27.5px;
  --text-xl: 44.5px;
  --text-2xl: 72.0px;
  --text-3xl: 116.5px;
  --text-4xl: 188.5px;
  --text-display: clamp(68px, 14.1vw, 180px);
  --text-figure: clamp(57px, 10.2vw, 130px);
  --weight-heading: 801;
  --weight-body: 400;
  --leading-body: 1.72;
  --leading-heading: 1.21;
  --tracking-heading: -0.021em;
  --radius-sm: 1px;
  --radius-md: 2px;
  --radius-lg: 2px;
  --radius-pill: 2px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1220px;
  --measure: 70ch;
  --gutter: 24px;
  --section-y: 92px;
  --section-y-lg: 129px;
}

/* ===== 外壳自有 token（不覆盖上方变量） ===== */
:root {
  --header-h-base: 76px;
  --header-h-scrolled: 56px;
  --rail: 3px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 152ms;
  --t-block: 240ms;
  --t-hero: 360ms;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h-base) + var(--space-3));
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  letter-spacing: 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
strong, b { font-weight: var(--weight-heading); }
[hidden] { display: none !important; }

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

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

/* ===== 排版工具 ===== */
.text-mono,
.figure-num,
code, kbd, samp, time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.display-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  text-transform: none;
  margin: 0;
}

.figure-num {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-ink-soft);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: var(--rail);
  background: var(--color-primary);
}

.lead-note {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2,
.prose h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}
.prose a {
  color: var(--color-primary);
  border-bottom: var(--border-thin) dashed var(--color-primary);
}
.prose strong { color: var(--color-ink); }

/* ===== 布局 ===== */
.container {
  width: min(100% - var(--space-4) * 2, var(--container));
  margin-inline: auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--gutter);
}
.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; }
.offset-1 { grid-column-start: 2; }
.offset-2 { grid-column-start: 3; }

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background: var(--color-surface-alt); }

.section--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--contrast .section-title,
.section--contrast .display-title { color: var(--color-contrast-ink); }
.section--contrast .eyebrow { color: var(--color-contrast-accent); }
.section--contrast .eyebrow::before { background: var(--color-contrast-accent); }
.section--contrast .lead-note { color: var(--color-contrast-ink); opacity: 0.78; }
.section--contrast a { color: var(--color-contrast-accent); }

/* ===== 分隔与强调 ===== */
.rule-dotted {
  border: 0;
  border-top: var(--border-thin) dashed var(--color-line);
  margin: 0;
}
.section--contrast .rule-dotted { border-top-color: var(--color-contrast-line); }

.rule-ticks {
  height: 10px;
  border: 0;
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 1px, transparent 1px 12px);
}
.rule-ticks--contrast {
  background-image: repeating-linear-gradient(90deg, var(--color-contrast-line) 0 1px, transparent 1px 12px);
}

.rail {
  padding-left: var(--space-3);
  border-left: var(--rail) solid var(--color-primary);
}
.rail--accent { border-left-color: var(--color-accent); }
.section--contrast .rail { border-left-color: var(--color-contrast-accent); }

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-ink-soft);
  background: var(--color-surface);
}
.tag--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.tag--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.tag--highlight {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
  color: var(--color-ink);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.2;
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover { background: color-mix(in srgb, var(--color-primary) 82%, var(--color-ink)); transform: translateX(3px); }
.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover { background: color-mix(in srgb, var(--color-accent) 82%, var(--color-ink)); transform: translateX(3px); }
.btn--ghost {
  background: transparent;
  border-color: var(--color-line);
  color: var(--color-ink);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateX(3px); }
.btn--oncontrast {
  background: transparent;
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}
.btn--oncontrast:hover {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
  transform: translateX(3px);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 10px;
  color: var(--color-line);
}
.breadcrumb a { border-bottom: var(--border-thin) dashed transparent; }
.breadcrumb a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); font-weight: var(--weight-heading); }

/* ===== 卡片 ===== */
.panel {
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}
.panel--rail {
  border-left: var(--rail) solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.section--contrast .panel {
  background: color-mix(in srgb, var(--color-contrast-ink) 5%, transparent);
  border-color: var(--color-contrast-line);
}
.section--contrast .panel--rail { border-left-color: var(--color-contrast-accent); }

/* ===== 图片容器 ===== */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--scan::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    color-mix(in srgb, var(--color-contrast-surface) 24%, transparent) 0 1px,
    transparent 1px 4px
  );
}
.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-2) var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.media-frame__caption::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail);
  background: var(--color-contrast-accent);
}

/* ===== 分段切换 ===== */
.tabs { display: block; }
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: var(--border-thin) dashed var(--color-line);
}
.tabs__tab {
  padding: 12px 18px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  border-left: var(--rail) solid transparent;
  transition: color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.tabs__tab:hover { color: var(--color-ink); background: var(--color-primary-soft); }
.tabs__tab[aria-selected="true"] {
  color: var(--color-ink);
  background: var(--color-highlight);
  border-left-color: var(--color-accent);
}
.tabs__panel { padding-top: var(--space-4); }
.section--contrast .tabs__list { border-bottom-color: var(--color-contrast-line); }
.section--contrast .tabs__tab { color: var(--color-contrast-ink); }
.section--contrast .tabs__tab[aria-selected="true"] {
  color: var(--color-contrast-ink);
  background: color-mix(in srgb, var(--color-contrast-accent) 22%, transparent);
  border-left-color: var(--color-contrast-accent);
}

/* ===== 筛选 ===== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.filter-bar input {
  flex: 1 1 240px;
  padding: 12px 14px;
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.4;
}
.filter-bar input::placeholder { color: var(--color-ink-muted); }

/* ===== 复制 ===== */
.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  padding: 8px 10px;
  border: var(--border-thin) dashed currentColor;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: inherit;
  text-align: left;
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.copy-chip:hover { color: var(--color-contrast-accent); }
.copy-chip[data-copied] { border-style: solid; }
.copy-chip__value { word-break: break-all; }
.copy-chip__hint {
  flex: 0 0 auto;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  opacity: 0.75;
}

/* ===== 进入显现 ===== */
[data-reveal] {
  transition: opacity var(--t-block) var(--ease), transform var(--t-block) var(--ease);
}
html.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
}
html.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ===== 跳转链接 ===== */
.skip-link {
  position: fixed;
  top: calc(-1 * var(--space-8));
  left: var(--space-3);
  z-index: 90;
  padding: 12px 18px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: var(--space-3); }

/* ===== 头部 ===== */
.site-header {
  --header-h: var(--header-h-base);
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: var(--header-h);
  background: color-mix(in srgb, var(--color-contrast-surface) 78%, transparent);
  border-bottom: var(--border-thin) dashed var(--color-contrast-line);
  color: var(--color-contrast-ink);
  transition: height var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.site-header[data-scrolled] {
  --header-h: var(--header-h-scrolled);
  background: var(--color-contrast-surface);
}

.header-inner {
  width: min(100% - var(--space-4) * 2, var(--container));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}
.brand-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}
.brand-sub {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.site-nav {
  margin-left: auto;
  height: 100%;
}
.nav-list {
  display: flex;
  align-items: stretch;
  height: 100%;
}
.nav-list > li { display: flex; }
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 14px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.2;
  color: var(--color-contrast-ink);
  border-left: var(--rail) solid transparent;
  transition: color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.nav-link:hover {
  color: var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
}
.nav-link[aria-current="page"] {
  color: var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-accent) 20%, transparent);
  border-left-color: var(--color-contrast-accent);
}

.header-tools {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.status-lamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: var(--border-thin) dashed var(--color-contrast-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  white-space: nowrap;
}
.status-dot {
  width: 8px;
  height: 8px;
  background: var(--color-contrast-accent);
}
.tool-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.tool-link:hover {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
}
.nav-toggle-bars {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--border-thick);
  background: transparent;
}
.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--color-contrast-accent);
  transition: width var(--t-fast) linear;
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: var(--section-y);
  padding-block: var(--space-8) var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-contrast-accent);
}
.footer-inner {
  width: min(100% - var(--space-4) * 2, var(--container));
  margin-inline: auto;
}
.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) dashed var(--color-contrast-line);
}
.footer-brand {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}
.footer-sign {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--gutter);
  margin-top: var(--space-6);
}
.footer-panel {
  grid-column: span 2;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-ink) 5%, transparent);
}
.footer-panel--lead { grid-column: span 6; }
.panel-title {
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) dashed var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}
.panel-lines {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}
.panel-lines li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: var(--space-2);
  border-left: var(--rail) solid var(--color-contrast-accent);
}
.line-key {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
}
.line-val {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}
.panel-links li + li { margin-top: 10px; }
.panel-links a {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) dashed transparent;
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.panel-links a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.panel-contact li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 0;
  border-bottom: var(--border-thin) dashed var(--color-contrast-line);
}
.panel-contact li:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}
.contact-value {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
}
.panel-note {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}
.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.footer-legal { letter-spacing: 0.08em; }
.footer-note { color: var(--color-contrast-accent); }

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .status-lamp { display: none; }
}

@media (max-width: 960px) {
  .header-inner { gap: var(--space-2); }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    height: auto;
    margin-left: 0;
    display: none;
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
    background: var(--color-contrast-surface);
    border-top: var(--border-thin) dashed var(--color-contrast-line);
    border-bottom: var(--border-thick) solid var(--color-contrast-accent);
  }
  .site-header[data-open] .site-nav { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    height: auto;
    padding: var(--space-2);
    gap: 0;
  }
  .nav-list > li { display: block; }
  .nav-link {
    height: auto;
    padding: 14px 16px;
    border-bottom: var(--border-thin) dashed var(--color-contrast-line);
  }
  .nav-link[aria-current="page"] { border-left-color: var(--color-contrast-accent); }

  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-1, .span-2, .span-3, .span-4, .span-5, .span-6 { grid-column: span 2; }
  .offset-1, .offset-2 { grid-column-start: auto; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-panel,
  .footer-panel--lead { grid-column: span 2; }
  .panel-lines { grid-template-columns: 1fr; }

  .display-title { font-size: var(--text-xl); }
}

@media (max-width: 620px) {
  .container,
  .header-inner,
  .footer-inner { width: min(100% - var(--space-3) * 2, var(--container)); }

  .brand-sub { display: none; }

  .grid { grid-template-columns: minmax(0, 1fr); }
  .span-1, .span-2, .span-3, .span-4, .span-5, .span-6 { grid-column: span 1; }

  .section { padding-block: var(--space-8); }
  .section--lg { padding-block: var(--space-8); }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-panel,
  .footer-panel--lead { grid-column: span 1; }
  .footer-head { flex-direction: column; align-items: flex-start; }

  .tabs__list { flex-direction: column; }
  .tabs__tab { border-left: 0; border-bottom: var(--border-thin) dashed var(--color-line); }
  .tabs__tab[aria-selected="true"] { border-left: 0; border-bottom-color: var(--color-accent); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
  html.reveal-ready [data-reveal] { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}