:root {
  --color-surface: #f7f7f7;
  --color-surface-alt: #eeeeef;
  --color-surface-deep: #e2e2e3;
  --color-ink: #45474f;
  --color-ink-soft: #6a6d76;
  --color-ink-muted: #7a7c85;
  --color-line: #d7d7d9;
  --color-primary: #0e42f1;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #d6def6;
  --color-accent: #36870d;
  --color-accent-ink: #ffffff;
  --color-highlight: #d4e3cd;
  --color-focus: #2e8005;
  --color-contrast-surface: #13192c;
  --color-contrast-ink: #e4e5e7;
  --color-contrast-line: #414655;
  --color-contrast-accent: #5ce916;
  --overlay-scrim: linear-gradient(180deg, rgba(19, 25, 44, 0.35) 0%, rgba(19, 25, 44, 0.72) 55%, rgba(19, 25, 44, 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: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(45px, 9.3vw, 119px);
  --text-figure: clamp(38px, 6.7vw, 86px);
  --weight-heading: 872;
  --weight-body: 400;
  --leading-body: 1.68;
  --leading-heading: 1.16;
  --tracking-heading: -0.001em;
  --radius-sm: 13px;
  --radius-md: 16px;
  --radius-lg: 19px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 2px;
  --shadow-1: 0 1px 0 rgba(69, 71, 79, 0.12);
  --shadow-2: 0 2px 0 rgba(69, 71, 79, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1100px;
  --measure: 72ch;
  --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;
  text-size-adjust: 100%;
}
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);
  overflow-wrap: break-word;
}
img, svg, video { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
p { margin: 0 0 var(--space-2); }
a { color: var(--color-primary); text-decoration-thickness: var(--border-thin); text-underline-offset: 3px; }
strong, b { font-weight: var(--weight-heading); }
:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 中文排版与正文容器 ---------- */
.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}
.prose > p + p { margin-top: var(--space-2); }
.prose h2 { font-size: var(--text-xl); }
.prose h3 { font-size: var(--text-lg); }
.prose ul, .prose ol { margin: 0 0 var(--space-2); padding-left: 1.4em; list-style: disc; }
.prose li + li { margin-top: 4px; }
.lede {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.display-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}
.figure-num {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-accent);
}
.figure-unit {
  margin-left: 4px;
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  color: var(--color-ink-soft);
}

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--flat { padding-block: var(--space-4); }
.section--alt { background-color: var(--color-surface-alt); }
.section--highlight { background-color: var(--color-highlight); }
.section--deep {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--deep h1,
.section--deep h2,
.section--deep h3,
.section--deep h4,
.section--deep .card-title { color: var(--color-contrast-ink); }
.section--deep a { color: var(--color-contrast-accent); }
.section--deep .lede,
.section--deep .figure-unit,
.section--deep .card-note { color: var(--color-contrast-ink); }
.section--deep .figure-num { color: var(--color-contrast-accent); }
.section--deep .chip { background-color: transparent; border-color: var(--color-contrast-line); color: var(--color-contrast-ink); }

.grid-10 {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: var(--gutter);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-10 { grid-column: span 10; }

.stack > * + * { margin-top: var(--space-2); }
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

/* ---------- 错位边界与装饰形状 ---------- */
.edge-slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), 0 100%);
  padding-bottom: calc(var(--section-y) + 22px);
}
.edge-gap {
  position: relative;
  border-bottom: var(--border-thick) solid var(--color-line);
}
.edge-gap::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: calc(-1 * var(--border-thick));
  width: 34%;
  height: var(--border-thick);
  background-color: var(--color-accent);
}
.deco-host { position: relative; isolation: isolate; }
.deco { position: absolute; pointer-events: none; z-index: 0; }
.deco-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-accent);
}
.deco-ring {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: var(--border-thick) solid var(--color-primary);
}
.deco-zig {
  width: 64px;
  height: 12px;
  background-image: repeating-linear-gradient(135deg, var(--color-primary) 0 6px, transparent 6px 12px);
}
.deco-slab {
  width: 56px;
  height: 14px;
  border-radius: var(--radius-pill);
  background-color: var(--color-highlight);
  border: var(--border-thin) solid var(--color-line);
}

/* ---------- 头部 ---------- */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -120px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: top 160ms ease;
}
.skip-link:focus { top: var(--space-2); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-line);
}
.progress-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background-color: var(--color-surface-deep);
  overflow: hidden;
}
.progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 120ms linear;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-2);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--color-ink);
}
.brand-mark {
  display: inline-grid;
  grid-template-columns: repeat(2, 10px);
  grid-auto-rows: 10px;
  gap: 2px;
}
.brand-mark i { display: block; border-radius: 3px; background-color: var(--color-primary); }
.brand-mark i:nth-child(2) { background-color: var(--color-accent); border-radius: var(--radius-pill); }
.brand-mark i:nth-child(3) { background-color: var(--color-contrast-surface); }
.brand-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  white-space: nowrap;
}
.nav-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  flex: 0 0 auto;
  margin: 0;
  padding: 4px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  white-space: nowrap;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 22%, transparent);
  animation: statusPulse 2.4s ease-in-out infinite;
}
@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.site-nav { margin-inline: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  counter-reset: navIndex;
}
.nav-list li { display: block; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.nav-link::before {
  counter-increment: navIndex;
  content: counter(navIndex, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  opacity: 0.65;
}
.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.nav-link[aria-current="page"] {
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}
.nav-link[aria-current="page"]::before { opacity: 1; }
.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 18px;
  border: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  text-decoration: none;
  box-shadow: var(--shadow-2);
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.header-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--color-accent);
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 14px;
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
  cursor: pointer;
}
.nav-toggle-bars { display: grid; gap: 3px; }
.nav-toggle-bars i {
  display: block;
  width: 16px;
  height: var(--border-thin);
  background-color: currentColor;
}
.nav-toggle-text {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
}
.nav-toggle[aria-expanded="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--color-surface-alt);
  border-top: var(--border-thick) solid var(--color-line);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  padding-block: var(--space-3);
}
.footer-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-3);
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.footer-brand {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}
.footer-link {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.footer-icp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.footer-slabs {
  display: flex;
  gap: var(--space-1);
  padding: 0 var(--gutter) var(--space-2);
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
}
.footer-slabs span {
  display: block;
  flex: 1 1 auto;
  height: 6px;
  border-radius: var(--radius-pill);
}
.footer-slabs span:nth-child(1) { background-color: var(--color-primary); }
.footer-slabs span:nth-child(2) { background-color: var(--color-accent); }
.footer-slabs span:nth-child(3) { background-color: var(--color-highlight); border: var(--border-thin) solid var(--color-line); }
.footer-slabs span:nth-child(4) { background-color: var(--color-contrast-surface); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 22px;
  border: var(--border-thick) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-2);
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--color-accent); }
.btn:active { transform: translate(0, 0); box-shadow: var(--shadow-1); }
.btn--primary { background-color: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); }
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent); }
.btn--accent:hover { box-shadow: 4px 4px 0 var(--color-primary); }
.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: none;
}
.btn--ghost:hover { background-color: var(--color-primary-soft); box-shadow: none; }
.btn--sm { padding: 7px 14px; font-size: var(--text-sm); }

/* ---------- 卡片 / 面板 / 标签 ---------- */
.card {
  position: relative;
  background-color: var(--color-surface);
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-2);
}
.card--tilt-a { transform: rotate(-1.1deg); }
.card--tilt-b { transform: rotate(0.9deg); }
.card--tilt-c { transform: rotate(-0.6deg); }
.card-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}
.card-note {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.panel {
  background-color: var(--color-surface-alt);
  border-left: 6px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.panel--deep {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-left-color: var(--color-contrast-accent);
}
.panel--deep .figure-num { color: var(--color-contrast-accent); }
.panel--deep .card-note,
.panel--deep .figure-unit { color: var(--color-contrast-ink); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-deep);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  line-height: 1.5;
}
.chip--primary {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.chip--accent {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.chip--soft {
  background-color: var(--color-highlight);
  border-color: var(--color-line);
  color: var(--color-ink);
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-3);
}
.stat-item {
  padding-top: var(--space-1);
  border-top: var(--border-thick) solid var(--color-line);
}
.section--deep .stat-item { border-top-color: var(--color-contrast-line); }

/* ---------- 分段切换 ---------- */
.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-deep);
}
.seg-btn {
  padding: 6px 14px;
  border: 0;
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}
.seg-btn:hover { color: var(--color-primary); }
.seg-btn[aria-selected="true"] {
  background-color: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-1);
}

/* ---------- 图片容器 ---------- */
.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-deep);
}
.figure-frame img,
.figure-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.ratio-16x9 { aspect-ratio: 16 / 9; }
.ratio-4x3 { aspect-ratio: 4 / 3; }
.ratio-1x1 { aspect-ratio: 1 / 1; }
.figure-scrim {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-2);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
}
.figure-caption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.section--deep .figure-caption { color: var(--color-contrast-ink); }

/* ---------- 面包屑与章节导航 ---------- */
.breadcrumb { margin-bottom: var(--space-3); }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.breadcrumb-list li { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb-list li + li::before {
  content: "/";
  color: var(--color-line);
}
.breadcrumb-list a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb-list a:hover { color: var(--color-primary); }
.section-nav { position: sticky; top: calc(var(--space-8) + var(--space-2)); }
.section-nav a {
  display: block;
  padding: 6px 10px;
  border-left: var(--border-thick) solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}
.section-nav a:hover { color: var(--color-primary); }
.section-nav a[data-active="true"] {
  color: var(--color-primary);
  border-left-color: var(--color-accent);
  background-color: var(--color-primary-soft);
}

/* ---------- 进入视口显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 220ms ease, transform 220ms ease;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .nav-status { display: none; }
}
@media (max-width: 1000px) {
  .site-header { position: sticky; }
  .nav-toggle { display: inline-flex; }
  .header-cta { margin-left: 0; padding: 8px 14px; font-size: var(--text-xs); }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin-inline: 0;
    padding: var(--space-2) var(--gutter) var(--space-4);
    background-color: var(--color-surface-alt);
    border-bottom: var(--border-thick) solid var(--color-line);
    border-top: var(--border-thick) solid var(--color-line);
  }
  .site-nav[data-open] { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: var(--space-1); }
  .nav-link {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
  }
  .nav-link:hover { transform: none; }
  .grid-10 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 2; }
  .col-6, .col-7, .col-8, .col-10 { grid-column: span 4; }
  .section-nav { position: static; }
}
@media (max-width: 640px) {
  .container { padding-inline: var(--space-3); }
  .header-inner { gap: var(--space-2); padding-block: var(--space-2); }
  .brand-name { font-size: var(--text-base); }
  .header-cta { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .footer-slabs { padding-inline: var(--space-3); }
  .grid-10 { grid-template-columns: 1fr; }
  .grid-10 > * { grid-column: 1 / -1 !important; }
  .card--tilt-a, .card--tilt-b, .card--tilt-c { transform: none; }
  .edge-slant { clip-path: none; padding-bottom: var(--section-y); }
}

/* ---------- 动效克制 ---------- */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .card--tilt-a, .card--tilt-b, .card--tilt-c { transform: none; }
  .btn:hover, .header-cta:hover, .nav-link:hover { transform: none; }
}