/* ========== 幻影入口 Site Kit — 共享样式 ========== */

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

html {
  min-height: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--color-bg-light) var(--color-bg-dark);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 50% 35% at 85% 0%, rgba(123, 45, 142, 0.18), transparent 60%),
    radial-gradient(ellipse 35% 25% at 5% 30%, rgba(0, 229, 160, 0.05), transparent 50%),
    radial-gradient(ellipse 45% 35% at 50% 110%, rgba(242, 183, 5, 0.04), transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-head);
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.625rem, 3.5vw, 2.125rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

a {
  color: inherit;
  text-decoration-color: rgba(0, 229, 160, 0.45);
  text-underline-offset: 0.2em;
  transition: color 0.2s var(--ease-fast), text-decoration-color 0.2s var(--ease-fast);
}

a:hover {
  color: var(--color-action);
  text-decoration-color: var(--color-action);
}

ul,
ol {
  margin-top: 0;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

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

code,
pre {
  font-family: var(--font-mono);
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

::selection {
  background: rgba(0, 229, 160, 0.25);
  color: var(--color-text);
}

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

#main-content {
  flex: 1 0 auto;
  scroll-margin-top: 2rem;
}

[id] {
  scroll-margin-top: 2rem;
}

/* ---------- 2. CSS Variables ---------- */
:root {
  /* Color */
  --color-bg: #0b1b3d;
  --color-bg-light: #1e3a6e;
  --color-bg-dark: #060e1f;
  --color-purple: #7b2d8e;
  --color-gold: #f2b705;
  --color-action: #00e5a0;
  --color-text: #e6eaf2;
  --color-text-dim: #a8b3c9;
  --color-glass: rgba(255, 255, 255, 0.15);

  /* Typography */
  --font-head: 'Inter', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', monospace;

  /* Layout */
  --container: 1240px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;

  /* Motion */
  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-fast: cubic-bezier(0.2, 0, 0.2, 1);
  --dur-fast: 0.2s;
  --dur-slow: 0.4s;
  --dur-reveal: 0.6s;

  /* Shape */
  --clip-notch: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  --clip-notch-sm: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  --radius: 4px;
}

/* ---------- 3. Utilities ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.625rem 1.375rem;
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.2s var(--ease-fast), filter 0.2s var(--ease-fast), background-color 0.2s var(--ease-fast), color 0.2s var(--ease-fast), border-color 0.2s var(--ease-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-action);
  color: var(--color-bg-dark);
  clip-path: var(--clip-notch-sm);
}

.btn--primary:hover {
  filter: brightness(1.08);
  color: var(--color-bg-dark);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-glass);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-bg-dark);
  clip-path: var(--clip-notch-sm);
}

.btn--gold:hover {
  filter: brightness(1.08);
  color: var(--color-bg-dark);
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- 5. Sections ---------- */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  position: relative;
}

.section--tight {
  padding: clamp(2rem, 4vw, 3rem) 0;
}

.section--alt {
  background:
    radial-gradient(ellipse 40% 60% at 90% 10%, rgba(123, 45, 142, 0.14), transparent 60%),
    var(--color-bg-light);
}

.section--deep {
  background:
    radial-gradient(ellipse 45% 70% at 10% 0%, rgba(123, 45, 142, 0.16), transparent 55%),
    var(--color-bg-dark);
}

.section__head {
  max-width: 42rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--sp-3);
}

.section__title {
  margin: 0 0 var(--sp-4);
}

.section__lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-dim);
  margin: 0;
}

/* ---------- 6. Panels ---------- */
.panel {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: linear-gradient(145deg, rgba(30, 58, 110, 0.65), rgba(11, 27, 61, 0.85));
  border: 1px solid var(--color-glass);
  clip-path: var(--clip-notch);
}

.panel::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  background: var(--color-purple);
}

.panel--gold::before {
  background: var(--color-gold);
}

.panel--green::before {
  background: var(--color-action);
}

.panel--purple::before {
  background: var(--color-purple);
}

/* ---------- 7. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  border-radius: 999px;
  border: 1px solid var(--color-glass);
  color: var(--color-text-dim);
  background: rgba(255, 255, 255, 0.04);
}

.tag--purple {
  color: #d18ae3;
  border-color: rgba(123, 45, 142, 0.55);
  background: rgba(123, 45, 142, 0.15);
}

.tag--gold {
  color: var(--color-gold);
  border-color: rgba(242, 183, 5, 0.4);
  background: rgba(242, 183, 5, 0.1);
}

.tag--green {
  color: var(--color-action);
  border-color: rgba(0, 229, 160, 0.4);
  background: rgba(0, 229, 160, 0.1);
}

/* ---------- 8. Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin: 0 0 var(--sp-6);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.breadcrumbs li + li::before {
  content: '→';
  color: var(--color-text-dim);
  opacity: 0.5;
}

.breadcrumbs a {
  color: var(--color-text-dim);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-action);
}

.breadcrumbs [aria-current='page'] {
  color: var(--color-text);
}

/* ---------- 9. Image Frames ---------- */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 80% at 50% 30%, rgba(123, 45, 142, 0.28), transparent 70%),
    linear-gradient(160deg, var(--color-bg-light), var(--color-bg-dark));
  border: 1px solid var(--color-glass);
  clip-path: var(--clip-notch);
}

.img-frame--wide {
  aspect-ratio: 21 / 9;
}

.img-frame--tall {
  aspect-ratio: 3 / 4;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

.img-frame__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-align: center;
  padding: var(--sp-4);
}

/* ---------- 10. Step Path ---------- */
.step-path {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-path__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-5);
  padding-bottom: 2.25rem;
}

.step-path__item:last-child {
  padding-bottom: 0;
}

.step-path__node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-bg-dark);
  background: var(--color-gold);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.step-path__line {
  position: absolute;
  left: 1.25rem;
  top: 2.5rem;
  bottom: 0.25rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold), var(--color-purple));
  opacity: 0.5;
}

.step-path__item:last-child .step-path__line {
  display: none;
}

.step-path__content h3 {
  margin: 0.25rem 0 var(--sp-2);
  font-size: 1.125rem;
}

.step-path__content p {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ---------- 11. Status Panel ---------- */
.status-panel {
  display: grid;
  gap: var(--sp-1);
  padding: 1.25rem 1.5rem;
  background: rgba(11, 27, 61, 0.7);
  border: 1px solid var(--color-glass);
  border-left: 3px solid var(--color-action);
  clip-path: var(--clip-notch-sm);
}

.status-panel__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
}

.status-panel__value {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
}

.status-panel__value--gold {
  color: var(--color-gold);
}

/* ---------- 12. Slash Line ---------- */
.slash-line {
  display: block;
  width: 100%;
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--color-action), var(--color-gold), transparent);
  transform: rotate(-1.5deg);
  opacity: 0.55;
}

/* ---------- 13. Page Hero ---------- */
.page-hero {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  border-bottom: 1px solid var(--color-glass);
}

.page-hero__title {
  margin-bottom: var(--sp-4);
}

.page-hero__lead {
  max-width: 42rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-dim);
  margin: 0;
}

/* ---------- 14. Hero Split ---------- */
.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding: clamp(2.5rem, 7vw, 5rem) 0;
}

/* ---------- 15. Header ---------- */
.site-header {
  position: relative;
  z-index: 50;
  background:
    radial-gradient(ellipse 40% 100% at 90% -20%, rgba(123, 45, 142, 0.32), transparent 60%),
    radial-gradient(ellipse 30% 80% at 5% -10%, rgba(0, 229, 160, 0.08), transparent 55%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-glass);
}

.site-header::after {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--color-purple) 0%, var(--color-gold) 50%, var(--color-action) 100%);
  opacity: 0.55;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--color-action);
  color: var(--color-bg-dark);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top 0.25s var(--ease-expo), color 0.25s var(--ease-expo);
}

.skip-link:hover {
  color: var(--color-bg-dark);
}

.skip-link:focus {
  top: 1rem;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 300;
  pointer-events: none;
  background: linear-gradient(90deg, var(--color-purple), var(--color-gold), var(--color-action));
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--sp-4);
  padding: clamp(1rem, 3vw, 1.75rem) 0 clamp(0.75rem, 2vw, 1.25rem);
}

.masthead__side {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--sp-4);
  min-width: 0;
}

.masthead__side--actions {
  justify-content: flex-end;
}

.masthead__edition {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--color-text-dim);
  white-space: nowrap;
  text-transform: uppercase;
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
  text-decoration: none;
  color: var(--color-text);
  text-align: center;
}

.masthead__brand:hover {
  color: var(--color-text);
  text-decoration: none;
}

.masthead__brand-mark {
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-text);
  text-shadow: 0 0 24px rgba(123, 45, 142, 0.5), 0 0 48px rgba(242, 183, 5, 0.18);
  animation: phantom-breathe 4s ease-in-out infinite;
  transition: text-shadow 0.25s var(--ease-fast);
}

.masthead__brand:hover .masthead__brand-mark {
  text-shadow: 0 0 36px rgba(123, 45, 142, 0.8), 0 0 72px rgba(242, 183, 5, 0.35);
}

.masthead__brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-text-dim);
  text-transform: uppercase;
}

@keyframes phantom-breathe {
  0%,
  100% {
    text-shadow: 0 0 20px rgba(123, 45, 142, 0.45), 0 0 40px rgba(242, 183, 5, 0.14);
  }
  50% {
    text-shadow: 0 0 32px rgba(123, 45, 142, 0.75), 0 0 64px rgba(242, 183, 5, 0.3);
  }
}

/* ---------- 16. Navigation ---------- */
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: var(--sp-4) var(--sp-5);
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease-fast), border-color 0.2s var(--ease-fast), background-color 0.2s var(--ease-fast);
}

.site-nav__link:hover {
  color: var(--color-action);
  border-bottom-color: rgba(0, 229, 160, 0.4);
  text-decoration: none;
}

.site-nav__link[aria-current='page'] {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-glass);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.2s var(--ease-fast), color 0.2s var(--ease-fast);
}

.nav-toggle:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.nav-toggle__icon {
  display: grid;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease-fast), opacity 0.2s var(--ease-fast);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 17. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background:
    radial-gradient(ellipse 50% 80% at 15% 0%, rgba(123, 45, 142, 0.2), transparent 60%),
    radial-gradient(ellipse 40% 60% at 90% 100%, rgba(242, 183, 5, 0.05), transparent 60%),
    var(--color-bg-dark);
  border-top: 1px solid var(--color-glass);
}

.site-footer::before {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(123, 45, 142, 0.7) 25%, rgba(242, 183, 5, 0.7) 50%, rgba(0, 229, 160, 0.5) 75%, transparent);
  opacity: 0.5;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.site-footer__block {
  min-width: 0;
}

.site-footer__mark {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-text);
  margin: 0 0 var(--sp-1);
}

.site-footer__tagline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin: 0 0 var(--sp-4);
}

.site-footer__trust {
  max-width: 28rem;
  color: var(--color-text-dim);
  font-size: 0.875rem;
  line-height: 1.8;
  margin: 0;
}

.site-footer__heading {
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin: 0 0 var(--sp-4);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.625rem;
}

.site-footer__link {
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s var(--ease-fast);
}

.site-footer__link:hover {
  color: var(--color-action);
  text-decoration: none;
}

.site-footer__text {
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.site-footer__bottom {
  border-top: 1px solid var(--color-glass);
  background: rgba(6, 14, 31, 0.6);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.375rem 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

/* ---------- 18. Reveal Animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-expo), transform var(--dur-reveal) var(--ease-expo);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay='1'] {
  transition-delay: 0.08s;
}

[data-reveal-delay='2'] {
  transition-delay: 0.16s;
}

[data-reveal-delay='3'] {
  transition-delay: 0.24s;
}

/* ---------- 19. Responsive ---------- */
@media (max-width: 960px) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-7);
  }
}

@media (max-width: 880px) {
  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .masthead__side:first-child {
    display: none;
  }

  .masthead__brand {
    justify-self: start;
    align-items: flex-start;
    text-align: left;
  }

  .masthead__brand-mark {
    font-size: 1.375rem;
  }

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

  .site-nav {
    display: none;
    border-top: 1px solid var(--color-glass);
    animation: nav-in 0.3s var(--ease-expo);
  }

  .site-nav[data-open] {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: var(--sp-2) 0;
  }

  .site-nav__link {
    padding: var(--sp-4) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav__link:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .site-nav__link[aria-current='page'] {
    border-bottom-color: var(--color-gold);
  }
}

@keyframes nav-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 600px) {
  .masthead__cta {
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    min-height: 40px;
  }

  .btn--quick-action {
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 20. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .masthead__brand-mark {
    animation: none;
    text-shadow: 0 0 20px rgba(123, 45, 142, 0.4);
  }

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

  .btn:hover,
  .btn:active {
    transform: none;
  }
}