/* ===== Reset & Variables ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --clr-primary: #0B3D2E;
  --clr-primary-light: #1A5C48;
  --clr-accent: #FF6B35;
  --clr-gold: #FFD700;
  --clr-dark: #0A2B20;
  --clr-light: #F4F7F5;
  --clr-text: #E8F1EC;
  --clr-text-dim: #ADBDB5;
  --clr-neon: #2DE1A7;
  --clr-warm-border: #FF9A73;
  --font-headline: 'Impact', 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'Consolas', monospace;
  --header-h: 72px;
  --space-xs: 0.375rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-box: 0 6px 0 rgba(0, 0, 0, 0.25), 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-float: 0 8px 0 rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.18);
  --container-w: 1200px;
  --h1: clamp(2.5rem, 6vw, 4.5rem);
  --h2: clamp(1.8rem, 4vw, 2.8rem);
  --h3: clamp(1.2rem, 2vw, 1.6rem);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--clr-text);
  background-color: var(--clr-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

:focus-visible {
  outline: 3px solid var(--clr-neon);
  outline-offset: 3px;
  border-radius: 4px;
}

[data-theme="light"] {
  --clr-primary: #E8F1EC;
  --clr-primary-light: #D2E3D9;
  --clr-text: #0B3D2E;
  --clr-text-dim: #33624A;
  --clr-dark: #B9D2C4;
  --clr-neon: #0F6D4F;
}

/* ===== Container ===== */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
}

/* ===== Skip Link ===== */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--clr-gold);
  color: #0A2B20;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-box);
  transition: top 0.2s ease-in-out;
}

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

/* ===== Site Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--clr-primary);
  border-bottom: 2px solid var(--clr-neon);
  backdrop-filter: blur(16px);
  transform: translateZ(0);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 225, 167, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 225, 167, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
  z-index: 0;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--clr-neon), var(--clr-accent), var(--clr-gold));
  z-index: 2;
  transition: width 0.08s linear;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: var(--header-h);
  position: relative;
  z-index: 1;
}

/* ===== Brand ===== */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  position: relative;
}

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--clr-accent);
  color: #0A2B20;
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
  border-radius: 10px;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.25), 0 0 0 2px var(--clr-neon) inset;
  position: relative;
}

.site-brand__mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px dashed rgba(255, 255, 255, 0.4);
  border-radius: 6px;
  pointer-events: none;
}

.site-brand__text {
  font-family: var(--font-headline);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--clr-text);
  line-height: 1;
}

.site-brand__sub {
  display: block;
  font-family: var(--font-data);
  font-size: 0.6rem;
  letter-spacing: 0.28em;
  color: var(--clr-neon);
  text-transform: uppercase;
  margin-top: 2px;
}

/* ===== Site Navigation ===== */
.site-nav__wrap {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(10, 43, 32, 0.72);
  padding: 0.3rem;
  border-radius: 48px;
  border: 1px solid rgba(45, 225, 167, 0.3);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

[data-theme="light"] .site-nav__list {
  background: rgba(11, 61, 46, 0.08);
  border-color: rgba(11, 61, 46, 0.2);
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 40px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
  position: relative;
}

[data-theme="light"] .site-nav__link {
  color: var(--clr-text);
}

.site-nav__link:hover {
  background: var(--clr-primary-light);
  color: var(--clr-neon);
  transform: translateY(-1px);
}

.site-nav__link[aria-current="page"] {
  background: var(--clr-accent);
  color: #0A2B20;
  font-weight: 700;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.3);
}

/* ===== Header Actions ===== */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(45, 225, 167, 0.5);
  background: rgba(26, 92, 72, 0.3);
  color: var(--clr-neon);
  font-size: 1.25rem;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  background: var(--clr-primary-light);
  transform: rotate(15deg);
  box-shadow: 0 0 0 3px rgba(45, 225, 167, 0.15);
}

.theme-toggle:active {
  transform: scale(0.92);
}

.theme-toggle__icon {
  display: block;
  line-height: 1;
  pointer-events: none;
}

.header-cta {
  display: inline-flex;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--clr-accent);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
  transform: scale(1.06);
  background: var(--clr-warm-border);
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: #0A2B20;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

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

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

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

/* ===== Footer ===== */
.site-foot {
  background: var(--clr-dark);
  color: var(--clr-text);
  border-top: 3px solid var(--clr-neon);
  position: relative;
  margin-top: auto;
}

.site-foot::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 53, 0.8), rgba(255, 215, 0, 0.6), transparent);
  opacity: 0.4;
  pointer-events: none;
}

.site-foot__main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: var(--space-xl) var(--space-lg);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.site-foot__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.site-brand--footer {
  flex-direction: row;
  align-items: center;
}

.site-brand--footer .site-brand__mark {
  width: 48px;
  height: 48px;
  font-size: 1.6rem;
}

.site-brand--footer .site-brand__text {
  font-size: 1.6rem;
}

.site-foot__trust {
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--clr-text-dim);
  border-left: 3px solid var(--clr-neon);
  padding-left: var(--space-md);
}

.site-foot__col {
  display: flex;
  flex-direction: column;
}

.site-foot__heading {
  font-family: var(--font-headline);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-neon);
  margin-bottom: var(--space-md);
  position: relative;
  padding-bottom: 0.5rem;
}

.site-foot__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--clr-accent);
}

.site-foot__links {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.site-foot__links a,
.site-foot__links li {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.18s ease, transform 0.18s ease;
}

.site-foot__links a:hover {
  color: var(--clr-gold);
  transform: translateX(3px);
}

.site-foot__contact .site-foot__links li {
  border-bottom: 1px dashed rgba(173, 189, 181, 0.15);
  padding-bottom: 0.5rem;
}

.site-foot__contact .site-foot__links li:last-child {
  border-bottom: none;
}

.site-foot__icp {
  margin-top: var(--space-md);
  font-size: 0.8rem;
  font-family: var(--font-data);
  color: var(--clr-neon);
  border: 1px solid rgba(45, 225, 167, 0.25);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  align-self: flex-start;
}

.site-foot__bottom {
  border-top: 1px solid rgba(173, 189, 181, 0.15);
  padding: 1.1rem 0;
  background: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .site-foot__bottom {
  background: rgba(11, 61, 46, 0.08);
}

.site-foot__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.site-foot__bottom p {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
}

/* ===== Back To Top ===== */
.back-to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--clr-accent);
  color: #0A2B20;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.3);
}

/* ===== Button Components ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  border: 2px solid transparent;
}

.btn--sm {
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
}

.btn--primary {
  background: var(--clr-accent);
  color: #0A2B20;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.25);
  border-color: var(--clr-warm-border);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.25);
}

.btn--ghost {
  background: transparent;
  color: var(--clr-neon);
  border-color: var(--clr-neon);
  padding: calc(0.7rem - 2px) 1.4rem;
}

.btn--ghost:hover {
  background: rgba(45, 225, 167, 0.1);
  transform: translateY(-2px);
}

.btn--gold {
  background: var(--clr-gold);
  color: #0A2B20;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.25);
}

.btn--gold:hover {
  transform: translateY(-2px);
}

/* ===== Data Tags ===== */
.data-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  font-family: var(--font-data);
  font-weight: 500;
  letter-spacing: 0.06em;
  border-radius: 100px;
  border: 1px solid rgba(45, 225, 167, 0.4);
  background: rgba(45, 225, 167, 0.08);
  color: var(--clr-neon);
  text-transform: uppercase;
}

.data-tag--gold {
  border-color: rgba(255, 215, 0, 0.45);
  background: rgba(255, 215, 0, 0.1);
  color: var(--clr-gold);
}

.data-tag--accent {
  border-color: var(--clr-warm-border);
  background: rgba(255, 107, 53, 0.12);
  color: var(--clr-warm-border);
}

/* ===== Page Hero ===== */
.page-hero {
  padding: var(--space-xl) 0;
  background: var(--clr-primary);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(45, 225, 167, 0.08));
  clip-path: polygon(25% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-hero__title {
  font-family: var(--font-headline);
  font-size: var(--h1);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--clr-text);
  margin-bottom: var(--space-md);
  position: relative;
}

.page-hero__lead {
  max-width: 50ch;
  color: var(--clr-text-dim);
  font-size: 1.05rem;
  line-height: 1.75;
  position: relative;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  margin-bottom: var(--space-md);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--clr-text-dim);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  font-family: var(--font-data);
  color: var(--clr-neon);
}

.breadcrumb__link {
  color: var(--clr-neon);
}

.breadcrumb__link:hover {
  color: var(--clr-gold);
}

.breadcrumb__current {
  color: var(--clr-text);
  font-weight: 600;
}

/* ===== Card ===== */
.card {
  background: var(--clr-primary-light);
  border: 2px solid rgba(45, 225, 167, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-box);
  border-color: rgba(45, 225, 167, 0.45);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(173, 189, 181, 0.15);
  padding-bottom: var(--space-sm);
}

.card__body {
  color: var(--clr-text-dim);
  font-size: 0.9rem;
  line-height: 1.65;
}

.card__footer {
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(173, 189, 181, 0.15);
  display: flex;
  justify-content: flex-end;
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.stat-card {
  background: var(--clr-dark);
  border: 1px solid rgba(45, 225, 167, 0.35);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-gold), var(--clr-accent));
  opacity: 0.7;
}

.stat-card__label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-dim);
  font-family: var(--font-data);
}

.stat-card__value {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.2;
  margin-top: 0.3rem;
  display: inline-block;
}

.stat-card__trend {
  font-size: 0.8rem;
  font-family: var(--font-data);
  color: var(--clr-gold);
}

/* ===== Section Label ===== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-headline);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--clr-text);
  text-transform: uppercase;
  position: relative;
}

.section-label::before {
  content: "";
  width: 3px;
  height: 1.4em;
  background: var(--clr-accent);
  display: inline-block;
}

/* ===== Divider ===== */
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, rgba(45, 225, 167, 0.4), transparent);
  margin: var(--space-lg) 0;
}

.divider--dark {
  background: linear-gradient(90deg, rgba(10, 43, 32, 0.2), transparent);
}

/* ===== Main Layout Helpers ===== */
.main-content {
  min-height: 60vh;
  padding: var(--space-lg) 0 var(--space-xl);
  flex: 1;
}

.content-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.sticky-panel {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

/* ===== Image Frames ===== */
.img-frame {
  position: relative;
  background: var(--clr-dark);
  border: 2px solid rgba(45, 225, 167, 0.3);
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  color: var(--clr-text-dim);
  font-family: var(--font-data);
  font-size: 0.8rem;
}

.img-frame::before {
  content: attr(data-placeholder);
  display: block;
  padding: 0.5rem;
  text-align: center;
  background: rgba(0, 0, 0, 0.3);
}

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

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

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

/* ===== Data Row ===== */
.data-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed rgba(173, 189, 181, 0.15);
  font-size: 0.88rem;
}

.data-row__value {
  font-family: var(--font-data);
  font-weight: 600;
  color: var(--clr-neon);
}

/* ===== Accordion ===== */
.accordion-item {
  border: 1px solid rgba(45, 225, 167, 0.2);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--clr-dark);
}

.accordion-item__heading {
  margin: 0;
}

.accordion-item__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.accordion-item__trigger:hover {
  background: rgba(45, 225, 167, 0.06);
}

.accordion-item__trigger::after {
  content: "+";
  font-family: var(--font-data);
  color: var(--clr-neon);
  transition: transform 0.2s ease;
}

.accordion-item__trigger[aria-expanded="true"]::after {
  transform: rotate(45deg);
}

.accordion-item__content {
  padding: 0 1rem 0.85rem;
  font-size: 0.875rem;
  color: var(--clr-text-dim);
  display: none;
}

.accordion-item__content[data-open] {
  display: block;
  animation: nav-drop 0.18s ease-out;
}

/* ===== Keyframes ===== */
@keyframes nav-drop {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --header-h: 64px;
  }

  .site-nav__wrap {
    position: absolute;
    top: calc(var(--header-h) - 6px);
    left: 0;
    right: 0;
    background: var(--clr-dark);
    border: 1px solid rgba(45, 225, 167, 0.3);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    padding: 0;
    display: none;
    flex-direction: column;
    box-shadow: var(--shadow-float);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    margin: 0 1rem;
  }

  .site-nav__wrap[data-open] {
    display: flex;
    animation: nav-drop 0.2s ease-out;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0.25rem;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: var(--space-md);
    width: 100%;
    box-shadow: none;
    align-items: stretch;
  }

  [data-theme="light"] .site-nav__list {
    background: transparent;
    border: none;
  }

  .site-nav__link {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    width: 100%;
    justify-content: flex-start;
    font-size: 1rem;
  }

  .site-nav__link[aria-current="page"] {
    background: var(--clr-accent);
    color: #0A2B20;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
  }

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

  .content-grid {
    grid-template-columns: 1fr;
  }

  .sticky-panel {
    position: static;
  }

  .site-foot__main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg) var(--space-md);
  }

  .site-foot__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 60px;
  }

  .site-header__inner {
    min-height: var(--header-h);
    gap: var(--space-sm);
  }

  .site-brand__mark {
    width: 38px;
    height: 38px;
    font-size: 1.2rem;
  }

  .site-brand__text {
    font-size: 1.05rem;
  }

  .site-brand__sub {
    font-size: 0.48rem;
    letter-spacing: 0.18em;
    display: none;
  }

  .theme-toggle {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }

  .header-cta {
    display: none;
  }

  .site-nav__wrap {
    top: calc(var(--header-h) - 4px);
    margin: 0 0.75rem;
    border-radius: var(--radius-md);
  }

  .site-nav__list {
    padding: var(--space-sm);
  }

  .site-nav__link {
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
  }

  .site-foot__main {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
  }

  .site-foot__brand {
    grid-column: auto;
  }

  .site-foot__bottom-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-sm);
  }

  .site-foot__bottom p {
    font-size: 0.7rem;
  }

  .page-hero {
    padding: var(--space-lg) 0;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .site-header__progress {
    transition: none;
  }

  .back-to-top,
  .theme-toggle,
  .site-nav__link {
    transition: none;
  }
}