:root {
  --color-surface: #f9f9fa;
  --color-surface-alt: #f0f0f2;
  --color-surface-deep: #e3e4e6;
  --color-ink: #454754;
  --color-ink-soft: #6b6d80;
  --color-ink-muted: #767889;
  --color-line: #d9d9dc;
  --color-primary: #414ebe;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #dfe1f2;
  --color-accent: #0c75d4;
  --color-accent-ink: #ffffff;
  --color-highlight: #cee1f3;
  --color-focus: #0170d5;
  --color-contrast-surface: #181925;
  --color-contrast-ink: #e4e4e7;
  --color-contrast-line: #454650;
  --color-contrast-accent: #0e85f1;
  --overlay-scrim: linear-gradient(180deg, rgba(24, 25, 37, 0.35) 0%, rgba(24, 25, 37, 0.72) 55%, rgba(24, 25, 37, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 12.9px;
  --text-sm: 15.5px;
  --text-base: 17px;
  --text-lg: 20.4px;
  --text-xl: 24.5px;
  --text-2xl: 29.4px;
  --text-3xl: 35.3px;
  --text-4xl: 42.3px;
  --text-display: clamp(34px, 6.5vw, 83px);
  --text-figure: clamp(28px, 4.7vw, 60px);
  --weight-heading: 678;
  --weight-body: 400;
  --leading-body: 1.72;
  --leading-heading: 1.28;
  --tracking-heading: 0.005em;
  --radius-sm: 14px;
  --radius-md: 16px;
  --radius-lg: 19px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(69, 71, 84, 0.08);
  --shadow-2: 0 18px 44px rgba(69, 71, 84, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1260px;
  --measure: 74ch;
  --gutter: 32px;
  --section-y: 83px;
  --section-y-lg: 116px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 168px;
}

body {
  margin: 0;
  background-color: 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: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { margin: 0; }

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover { color: var(--color-primary); }

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

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

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

/* ===== 排版工具 ===== */
.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.figure {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

/* ===== 容器 / 布局 ===== */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--space-6));
  margin-inline: auto;
  padding-inline: var(--space-3);
}

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

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: var(--text-2xl);
  letter-spacing: 0.02em;
}

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

.rule-offset {
  height: var(--border-thin);
  background-color: var(--color-line);
  width: calc(100% - var(--space-8));
  margin-left: auto;
  margin-block: var(--space-4);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px var(--space-2);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.05em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-1);
}
.btn--primary:hover {
  background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-contrast-surface));
  color: var(--color-primary-ink);
  transform: translateY(-1px);
}

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 84%, var(--color-primary));
  color: var(--color-accent-ink);
  transform: translateY(-1px);
}

.btn--ghost {
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
  border-color: var(--color-line);
}
.btn--ghost:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: color-mix(in srgb, var(--color-primary) 32%, var(--color-line));
}

.btn--quiet {
  background-color: transparent;
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 32%, transparent);
}
.btn--quiet:hover {
  background-color: var(--color-highlight);
  color: var(--color-primary);
}

/* ===== 跳转链接 ===== */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -120px;
  z-index: 140;
  padding: 10px var(--space-2);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  transition: top 0.18s ease;
}
.skip-link:focus { top: var(--space-2); color: var(--color-primary-ink); }

/* ===== 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: color-mix(in srgb, var(--color-surface) 93%, var(--color-surface-alt));
  border-bottom: var(--border-thin) solid var(--color-line);
  backdrop-filter: saturate(140%) blur(12px);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.1s linear;
}

.status-bar {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-xs);
}

.status-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  min-height: 36px;
  padding-block: 6px;
}

.status-bar__text {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-contrast-ink);
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.status-bar__mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
  white-space: nowrap;
}

.status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
  animation: status-pulse 2.4s ease-out infinite;
}

@keyframes status-pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-contrast-accent) 60%, transparent); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-3) var(--space-2);
}

.masthead__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.masthead__brand {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: var(--space-2);
  align-items: center;
  justify-self: center;
  color: var(--color-ink);
  text-decoration: none;
}
.masthead__brand:hover { color: var(--color-ink); }

.masthead__mark {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}

.masthead__word {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  line-height: 1.12;
  white-space: nowrap;
}

.masthead__tag {
  font-size: var(--text-xs);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.masthead__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 10px var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.05em;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: background-color 0.18s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 0.2s ease;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.site-header[data-nav-open="true"] .nav-toggle__bars { background-color: transparent; }
.site-header[data-nav-open="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-nav-open="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.primary-nav {
  border-top: var(--border-thin) solid var(--color-line);
  background-color: color-mix(in srgb, var(--color-surface-alt) 55%, var(--color-surface));
}

.primary-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding-block: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.primary-nav__link {
  display: block;
  white-space: nowrap;
  padding: 9px var(--space-2);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.primary-nav__link:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.primary-nav__link[aria-current="page"] {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.primary-nav__link[aria-current="page"]:hover {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: var(--section-y);
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  padding-bottom: var(--space-3);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
  gap: var(--space-3);
  padding-block: var(--space-6) var(--space-4);
}

.footer-panel {
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-1);
}

.footer-panel--contact {
  margin-top: var(--space-4);
  background-color: var(--color-highlight);
  border-color: color-mix(in srgb, var(--color-accent) 24%, var(--color-line));
}

.footer-panel__title {
  font-size: var(--text-lg);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.footer-note {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.footer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-block: var(--space-2) var(--space-3);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.footer-contact {
  display: grid;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1);
  font-size: var(--text-sm);
}

.footer-contact__label {
  flex: 0 0 auto;
  min-width: 52px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.footer-contact__value {
  flex: 1 1 200px;
  color: var(--color-ink);
  line-height: 1.55;
}

.copy-btn {
  flex: 0 0 auto;
  padding-bottom: 1px;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.copy-btn:hover { color: var(--color-primary); }

.copy-btn[data-copied="true"] {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.footer-panel--contact .btn { margin-top: var(--space-2); }

.footer-mega {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.footer-mega__inner { padding: var(--space-6) var(--space-3) var(--space-3); }

.footer-mega__word {
  margin-left: calc(var(--space-2) * -1);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-contrast-ink);
  white-space: nowrap;
  overflow: hidden;
}

.footer-mega__hot { color: var(--color-contrast-accent); }

.footer-mega__aside {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-3) var(--space-2);
}

.footer-legal {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  padding-bottom: 1px;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-ink-soft) 38%, transparent);
}
.footer-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===== 返回顶部 / 数据面板悬浮键 ===== */
.to-top {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px var(--space-2);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.1em;
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease, background-color 0.18s ease;
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 80%, var(--color-contrast-accent));
  color: var(--color-contrast-ink);
}

/* ===== Bento 模块 ===== */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-3);
}

.module {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.module:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.module--quiet { background-color: var(--color-surface); }

.module--deep {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.module--deep .module__label { color: color-mix(in srgb, var(--color-contrast-ink) 65%, var(--color-contrast-surface)); }
.module--deep .module__value { color: var(--color-contrast-accent); }

.module--focus {
  background-color: var(--color-primary);
  border-color: transparent;
  color: var(--color-primary-ink);
}
.module--focus .module__label { color: color-mix(in srgb, var(--color-primary-ink) 72%, var(--color-primary)); }
.module--focus .module__value { color: var(--color-primary-ink); }
.module--focus a { color: var(--color-primary-ink); }

.module__label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.module__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.tag--accent {
  background-color: color-mix(in srgb, var(--color-accent) 14%, var(--color-surface));
  color: var(--color-accent);
}

/* ===== 图片容器（展签式） ===== */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
}

.media-frame__img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.media-frame--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.media-frame__caption {
  position: absolute;
  left: var(--space-1);
  bottom: var(--space-1);
  z-index: 2;
  max-width: calc(100% - var(--space-2));
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}

.breadcrumb__list a { color: var(--color-ink-soft); }
.breadcrumb__list a:hover { color: var(--color-accent); }

.breadcrumb__sep {
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
}

/* ===== 正文 ===== */
.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.prose > * + * { margin-top: var(--space-2); }
.prose h2 { font-size: var(--text-2xl); margin-top: var(--space-4); }
.prose h3 { font-size: var(--text-xl); margin-top: var(--space-3); }
.prose strong { font-weight: var(--weight-heading); color: var(--color-ink); }
.prose a {
  color: var(--color-accent);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 40%, transparent);
}

.prose__lead {
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  display: grid;
  gap: var(--space-3);
  padding-left: var(--space-3);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background-color: var(--color-line);
}

.timeline__item {
  position: relative;
  padding-left: var(--space-1);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: calc(var(--space-3) * -1 + 1px);
  top: 0.6em;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 2px solid var(--color-accent);
}

/* ===== 滚动显现 ===== */
.reveal-ready {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .module { grid-column: span 6; }
  .grid-12 { gap: var(--space-3); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 132px; }

  .container { padding-inline: var(--space-2); }

  .masthead {
    grid-template-columns: 1fr auto;
    padding-block: var(--space-2) var(--space-1);
  }
  .masthead__meta { display: none; }
  .masthead__brand { justify-self: start; column-gap: var(--space-1); }
  .masthead__mark { width: 38px; height: 38px; font-size: var(--text-xs); }
  .masthead__word { font-size: var(--text-lg); letter-spacing: 0.04em; }
  .masthead__tag { display: none; }
  .masthead__actions .btn--ghost { display: none; }
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-2);
    transition: max-height 0.28s ease, visibility 0.28s ease;
  }

  .site-header[data-nav-open="true"] .primary-nav {
    max-height: min(70vh, 520px);
    overflow-y: auto;
    visibility: visible;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 4px;
    padding: var(--space-2) var(--space-2) var(--space-3);
  }

  .primary-nav__link {
    padding: 12px var(--space-2);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .footer-top { grid-template-columns: 1fr; gap: var(--space-2); }
  .footer-panel--contact { margin-top: 0; }
  .footer-mega__inner { padding: var(--space-4) var(--space-2) var(--space-3); }
  .rule-offset { width: 100%; margin-left: 0; }
}

@media (max-width: 599px) {
  .module { grid-column: span 12; }
  .bento, .grid-12 { gap: var(--space-2); }
  .status-bar__text { font-size: var(--text-xs); letter-spacing: 0.04em; }
  .footer-mega__word { margin-left: calc(var(--space-1) * -1); }
  .to-top { right: var(--space-2); bottom: var(--space-2); padding: 10px var(--space-2); }
  .footer-base { padding-block: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-progress { transition: none; }
  .status-dot { animation: none; }
  .module:hover { transform: none; }
  .btn:hover { transform: none; }
  .reveal-ready { opacity: 1; transform: none; transition: none; }
  .to-top { transition: none; }
  .primary-nav { transition: none; }
}