/* ========== 1. RESET & VARIABLES ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
:root {
  --c-bg: #0D1B2A;
  --c-bg-deep: #091521;
  --c-bg-raised: #152535;
  --c-paper: #F2E7D5;
  --c-paper-deep: #E4D3B8;
  --c-ink: #24130D;
  --c-ink-soft: #5A4034;
  --c-silver: #E0E6ED;
  --c-silver-dim: #A3B0BC;
  --c-violet: #7A5AF8;
  --c-violet-glow: #9D82FF;
  --c-red: #E84A2A;
  --c-gold: #D4AF37;
  --c-teal: #1B4965;
  --c-teal-light: #2D6A85;
  --font-title: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  --font-body: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", sans-serif;
  --font-index: "Segoe UI", "Arial", sans-serif;
  --fs-title: clamp(2.5rem, 6vw, 4.5rem);
  --fs-subtitle: clamp(1.5rem, 3.5vw, 2.5rem);
  --fs-body: 15px;
  --fs-small: 12px;
  --sidebar-w: 72px;
  --header-h-mobile: 60px;
  --moon-rail-h: 3px;
  --radius: 0px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.5s ease;
  --clip-corner: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  color: var(--c-silver);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(ellipse 800px 400px at 80% -10%, rgba(122, 90, 248, 0.12), transparent 65%),
    radial-gradient(ellipse 600px 300px at 20% 110%, rgba(27, 73, 101, 0.35), transparent 70%);
  background-attachment: fixed;
  min-height: 100vh;
  padding-left: var(--sidebar-w);
  overflow-x: hidden;
}
::selection {
  background: rgba(122, 90, 248, 0.4);
  color: var(--c-silver);
}
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--c-bg-deep);
}
::-webkit-scrollbar-thumb {
  background: var(--c-teal);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--c-violet);
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--c-violet-glow);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--c-silver);
}
:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: 2px;
  border-radius: 2px;
}
main,
.main-content {
  display: block;
  min-height: 60vh;
}

/* ========== 2. TYPOGRAPHY ========== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.2;
  color: var(--c-silver);
  margin-bottom: 0.5em;
  letter-spacing: 0.02em;
}
h1 {
  font-size: var(--fs-title);
}
h2 {
  font-size: var(--fs-subtitle);
}
h3 {
  font-size: 1.35rem;
}
h4 {
  font-size: 1.1rem;
  font-weight: 700;
}
p {
  margin-bottom: 1em;
  color: var(--c-silver-dim);
}
small {
  font-size: var(--fs-small);
}
b,
strong {
  font-weight: 700;
  color: var(--c-silver);
}
.em-num {
  font-family: var(--font-index);
  font-weight: 700;
  color: var(--c-gold);
}
.quote-block {
  border-left: 3px solid var(--c-violet);
  background: rgba(122, 90, 248, 0.06);
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 14px;
  color: var(--c-silver-dim);
  clip-path: var(--clip-corner);
}

/* ========== 3. ACCESSIBILITY ========== */
.skip-link {
  position: fixed;
  top: 10px;
  left: 80px;
  z-index: 5000;
  background: var(--c-violet);
  color: #fff;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transform: translateY(-200%);
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
  pointer-events: none;
}
.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ========== 4. MOON RAIL ========== */
.moon-rail {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--moon-rail-h);
  background: var(--c-bg-raised);
  z-index: 2000;
  pointer-events: none;
}
.moon-rail__fill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--c-teal) 0%, var(--c-violet) 40%, var(--c-gold) 100%);
  transform-origin: left center;
  transition: width 0.08s linear;
}
.moon-rail__dot {
  position: absolute;
  top: 50%;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.7), 0 0 16px rgba(212, 175, 55, 0.3);
  transform: translate(-50%, -50%);
  transition: left 0.08s linear;
}
.moon-rail__label {
  position: absolute;
  right: 12px;
  top: 5px;
  font-family: var(--font-index);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-bg);
  background: var(--c-gold);
  padding: 1px 7px;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  line-height: 16px;
  opacity: 0.9;
}

/* ========== 5. HEADER ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: linear-gradient(180deg, var(--c-bg-deep) 0%, var(--c-bg) 70%, var(--c-bg-raised) 100%);
  border-right: 1px solid rgba(122, 90, 248, 0.16);
  z-index: 1000;
}
.site-header__bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  padding-top: 18px;
}
.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 4px 4px 10px;
  width: 100%;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.brand:hover {
  opacity: 0.85;
}
.brand__mark {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-silver) 15%, var(--c-violet) 85%);
  box-shadow: 0 0 14px rgba(122, 90, 248, 0.35);
  flex-shrink: 0;
}
.brand__crescent {
  display: block;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  background: var(--c-bg-deep);
  position: absolute;
  top: -3px;
  right: -3px;
  transform: translate(12%, -8%);
}
.brand__txt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.brand__cn {
  font-family: var(--font-title);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--c-silver);
  white-space: nowrap;
  line-height: 1.2;
}
.brand__en {
  font-family: var(--font-index);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--c-silver-dim);
  white-space: nowrap;
  line-height: 1.2;
}
.site-header__rule {
  display: block;
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-violet), transparent);
  margin: 6px 0 10px;
}
.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
}
.site-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0;
}
.site-nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 8px 4px;
  text-decoration: none;
  position: relative;
  transition: background var(--transition-fast), color var(--transition-fast);
  border-radius: 4px;
}
.site-nav__link:hover {
  background: rgba(122, 90, 248, 0.08);
}
.site-nav__link[aria-current="page"] {
  background: rgba(122, 90, 248, 0.12);
}
.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22%;
  height: 56%;
  width: 3px;
  background: linear-gradient(180deg, var(--c-violet), var(--c-gold));
  border-radius: 0 2px 2px 0;
}
.site-nav__num {
  font-family: var(--font-index);
  font-size: 15px;
  font-weight: 600;
  color: var(--c-violet);
  line-height: 1.3;
  transition: color var(--transition-fast);
}
.site-nav__link:hover .site-nav__num {
  color: var(--c-violet-glow);
}
.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--c-gold);
}
.site-nav__label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 400;
  color: var(--c-silver-dim);
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-align: center;
  transition: color var(--transition-fast);
}
.site-nav__link:hover .site-nav__label {
  color: var(--c-silver);
}
.site-nav__link[aria-current="page"] .site-nav__label {
  color: var(--c-silver);
}
.site-header__ver {
  font-family: var(--font-index);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-align: center;
  color: var(--c-silver-dim);
  padding: 12px 4px;
  writing-mode: vertical-rl;
  border-top: 1px solid rgba(122, 90, 248, 0.15);
  margin-top: 8px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.site-header__ver b {
  font-family: var(--font-index);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-gold);
}
.nav-toggle {
  display: none;
  position: relative;
  z-index: 1500;
  background: transparent;
  border: 1px solid rgba(122, 90, 248, 0.4);
  border-radius: 4px;
  width: 44px;
  height: 38px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.nav-toggle:hover {
  background: rgba(122, 90, 248, 0.12);
  border-color: var(--c-violet);
}
.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-silver);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle.is-active .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.is-active .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-active .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ========== 6. FOOTER ========== */
.site-footer {
  background: var(--c-bg-deep);
  border-top: 1px solid rgba(122, 90, 248, 0.14);
  padding: 56px 48px 0;
  margin-top: 64px;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 40px;
  max-width: 1180px;
  margin: 0 auto 48px;
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  width: fit-content;
}
.site-footer__mark {
  position: relative;
  display: inline-block;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-silver) 20%, var(--c-violet) 85%);
  box-shadow: 0 0 10px rgba(122, 90, 248, 0.3);
}
.site-footer__mark::after {
  content: "";
  position: absolute;
  top: -3px;
  right: -3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--c-bg-deep);
  transform: translate(12%, -10%);
}
.site-footer__name {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--c-silver);
}
.site-footer__desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-silver-dim);
  max-width: 280px;
}
.site-footer__col {
  padding-top: 4px;
}
.site-footer__title {
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--c-silver);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(122, 90, 248, 0.35);
  display: inline-block;
}
.site-footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.site-footer__list a {
  font-size: 14px;
  color: var(--c-silver-dim);
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  position: relative;
}
.site-footer__list a:hover {
  color: var(--c-violet-glow);
  padding-left: 6px;
}
.site-footer__list a::before {
  content: "⟩";
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-violet);
  font-family: var(--font-index);
  font-size: 10px;
  opacity: 0;
  transition: opacity var(--transition-fast), left var(--transition-fast);
}
.site-footer__list a:hover::before {
  opacity: 1;
  left: -6px;
}
.site-footer__contact {
  padding-top: 4px;
}
.site-footer__contact-item {
  font-size: 14px;
  color: var(--c-silver-dim);
  line-height: 1.6;
  margin-bottom: 8px;
  font-family: var(--font-index);
  letter-spacing: 0.02em;
}
.site-footer__contact-item:last-child {
  margin-bottom: 0;
}
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.site-footer__copy,
.site-footer__icp {
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--c-silver-dim);
  margin: 0;
  letter-spacing: 0.04em;
}
.site-footer__icp {
  color: var(--c-teal-light);
  cursor: default;
}

/* ========== 7. BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--c-silver);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background var(--transition-fast), color var(--transition-fast),
              border-color var(--transition-fast), transform 0.15s ease,
              box-shadow var(--transition-fast);
}
.btn:active {
  transform: scale(0.98);
}
.btn--primary {
  background: linear-gradient(135deg, var(--c-violet) 0%, var(--c-teal) 130%);
  color: #fff;
  border-color: transparent;
}
.btn--primary:hover {
  background: linear-gradient(135deg, var(--c-violet-glow) 0%, var(--c-violet) 130%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(122, 90, 248, 0.3);
}
.btn--ghost {
  background: transparent;
  border-color: rgba(122, 90, 248, 0.55);
  color: var(--c-violet-glow);
}
.btn--ghost:hover {
  border-color: var(--c-violet);
  background: rgba(122, 90, 248, 0.08);
  color: var(--c-silver);
}
.btn--paper {
  background: var(--c-paper);
  color: var(--c-ink);
  border-color: var(--c-paper);
}
.btn--paper:hover {
  background: var(--c-paper-deep);
  color: var(--c-ink);
}
.btn--sm {
  padding: 6px 14px;
  font-size: 12px;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.btn[disabled] {
  opacity: 0.5;
  pointer-events: none;
}

/* ========== 8. BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--c-silver-dim);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}
.breadcrumb a {
  color: var(--c-silver-dim);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.breadcrumb a:hover {
  color: var(--c-violet-glow);
}
.breadcrumb__sep {
  color: var(--c-violet);
  font-size: 10px;
  opacity: 0.7;
}
.breadcrumb [aria-current="page"] {
  color: var(--c-gold);
}

/* ========== 9. CONTAINER & SECTION ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.section {
  padding: 56px 32px;
  max-width: 1200px;
  margin: 0 auto;
}
.section--narrow {
  max-width: 760px;
}
.section--wide {
  max-width: 1320px;
}
.section__head {
  margin-bottom: 32px;
  position: relative;
}
.section__index {
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-violet);
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}
.section__title {
  margin-bottom: 8px;
}
.section__desc {
  color: var(--c-silver-dim);
  max-width: 620px;
}

/* ========== 10. GRID ========== */
.layout-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}
.layout-grid > * {
  grid-column: span 12;
}
.layout-grid--2 > * {
  grid-column: span 6;
}
.layout-grid--3 > * {
  grid-column: span 4;
}
.layout-grid--4 > * {
  grid-column: span 3;
}
.layout-grid--mixed > *:first-child {
  grid-column: span 7;
}
.layout-grid--mixed > *:nth-child(2) {
  grid-column: span 5;
}

/* ========== 11. PANELS & BADGES ========== */
.panel {
  background: linear-gradient(145deg, var(--c-bg-raised), var(--c-bg));
  border: 1px solid rgba(122, 90, 248, 0.12);
  padding: 28px;
  clip-path: var(--clip-corner);
  color: var(--c-silver-dim);
  transition: border-color var(--transition-fast), transform 0.15s ease;
}
.panel:hover {
  border-color: rgba(122, 90, 248, 0.4);
}
.panel--paper {
  background: linear-gradient(145deg, var(--c-paper), var(--c-paper-deep));
  color: var(--c-ink);
  border-color: transparent;
}
.panel--paper h1,
.panel--paper h2,
.panel--paper h3,
.panel--paper h4,
.panel--paper strong,
.panel--paper b,
.panel--paper .section__title {
  color: var(--c-ink);
}
.panel--paper p,
.panel--paper .section__desc {
  color: var(--c-ink-soft);
}
.panel--paper .em-num {
  color: var(--c-red);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-index);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-silver);
  background: rgba(27, 73, 101, 0.45);
  padding: 3px 10px;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  line-height: 1.5;
  white-space: nowrap;
}
.badge--hot {
  background: rgba(232, 74, 42, 0.2);
  color: #FF8E70;
  border: 1px solid rgba(232, 74, 42, 0.35);
}
.badge--gold {
  background: rgba(212, 175, 55, 0.15);
  color: var(--c-gold);
  border: 1px solid rgba(212, 175, 55, 0.35);
}

/* ========== 12. REVEAL MOTION ========== */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 13. UTILITIES ========== */
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.flex {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.flex--between {
  justify-content: space-between;
}
.flex--column {
  flex-direction: column;
  align-items: flex-start;
}

/* ========== 14. RESPONSIVE ========== */
@media (max-width: 1024px) {
  .layout-grid--4 > * {
    grid-column: span 6;
  }
  .layout-grid--3 > * {
    grid-column: span 6;
  }
  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 28px;
  }
}
@media (max-width: 768px) {
  body {
    padding-left: 0;
    padding-top: var(--header-h-mobile);
  }
  .site-header {
    width: 100%;
    height: var(--header-h-mobile);
    flex-direction: row;
    align-items: center;
    padding: 3px 16px 0;
    border-right: none;
    border-bottom: 1px solid rgba(122, 90, 248, 0.15);
    background: linear-gradient(90deg, var(--c-bg-deep) 0%, var(--c-bg) 100%);
  }
  .site-header__bar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding-top: 0;
  }
  .brand {
    flex-direction: row;
    gap: 10px;
    padding: 0;
    width: auto;
  }
  .brand__mark {
    width: 32px;
    height: 32px;
  }
  .brand__crescent {
    width: 27px;
    height: 27px;
  }
  .brand__txt {
    align-items: flex-start;
  }
  .brand__cn {
    font-size: 15px;
    letter-spacing: 0.06em;
  }
  .brand__en {
    font-size: 7px;
  }
  .site-header__rule {
    display: none;
  }
  .site-header__ver {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .site-nav {
    position: absolute;
    top: var(--header-h-mobile);
    left: 0;
    width: 100%;
    height: auto;
    display: none;
    background: linear-gradient(180deg, var(--c-bg-deep) 0%, var(--c-bg) 100%);
    border-bottom: 1px solid rgba(122, 90, 248, 0.2);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.4);
    padding: 12px 24px 20px;
    flex: none;
    justify-content: flex-start;
  }
  .site-nav[data-open] {
    display: block;
    animation: nav-drop 0.3s ease-out;
  }
  @keyframes nav-drop {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  .site-nav__list {
    flex-direction: column;
    gap: 0;
  }
  .site-nav__item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .site-nav__item:last-child {
    border-bottom: none;
  }
  .site-nav__link {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 12px 8px;
    border-radius: 0;
  }
  .site-nav__link[aria-current="page"]::before {
    top: 10%;
    height: 80%;
    width: 3px;
  }
  .site-nav__num {
    font-size: 13px;
    width: 26px;
    text-align: center;
  }
  .site-nav__label {
    font-size: 15px;
    text-align: left;
  }
  .skip-link {
    left: 12px;
  }
  .container {
    padding: 0 20px;
  }
  .section {
    padding: 40px 20px;
  }
  .site-footer {
    padding: 40px 20px 0;
  }
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
  .site-footer__contact {
    grid-column: 1 / -1;
  }
}
@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .site-footer__contact {
    grid-column: auto;
  }
  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }
  .layout-grid--2 > *,
  .layout-grid--3 > *,
  .layout-grid--4 > * {
    grid-column: span 12;
  }
}

/* ========== 15. REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .moon-rail__fill,
  .moon-rail__dot {
    transition: none !important;
  }
}