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

:root {
  --c-black: #0A0E17;
  --c-red: #E63946;
  --c-gold: #F4A261;
  --c-green: #64FFDA;
  --c-silver: #C0C8D6;
  --c-fog: #F1F2F6;
  --c-teal: #1F3A3D;
  --c-wine: #722F37;

  --header-h: 132px;
  --header-top-h: 36px;
  --content-max: 1440px;
  --body-bg: var(--c-black);
  --body-text: var(--c-silver);

  --font-head: "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 7rem;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.45);
}

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

body {
  background: var(--c-black);
  color: var(--body-text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  font-style: italic;
  color: var(--c-fog);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

a {
  color: var(--c-silver);
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

a:hover {
  color: var(--c-gold);
}

ul, ol {
  list-style: none;
}

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

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

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

::selection {
  background: var(--c-red);
  color: var(--c-fog);
}

::-webkit-scrollbar {
  width: 10px;
  background: var(--c-black);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--c-wine), var(--c-teal));
  border-radius: 8px;
}

::-webkit-scrollbar-track {
  background: var(--c-black);
}

/* ===== Skip Link ===== */
.skip-link {
  position: fixed;
  top: -120px;
  left: var(--space-sm);
  z-index: 2000;
  background: var(--c-red);
  color: var(--c-fog);
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: var(--space-sm);
  color: var(--c-fog);
}

/* ===== Progress Bar ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-red), var(--c-gold), var(--c-green));
  z-index: 1200;
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ===== Header ===== */
.site-header-wrap {
  position: relative;
  z-index: 1000;
}

.site-header {
  background: rgba(10, 14, 23, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(244, 162, 97, 0.25);
  position: relative;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.45rem var(--space-md);
  background: linear-gradient(90deg, rgba(114, 47, 55, 0.4), rgba(31, 58, 61, 0.3));
  border-bottom: 1px solid rgba(230, 57, 70, 0.2);
}

.header-top__slogan {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--c-silver);
  text-transform: uppercase;
}

.header-top__slogan::before {
  content: "⚡";
  margin-right: 0.5rem;
  color: var(--c-green);
  font-size: 0.9rem;
}

.header-top__icp {
  font-size: 0.75rem;
  color: var(--c-silver);
  opacity: 0.7;
  font-family: var(--font-mono);
}

.header-top__icp:hover {
  color: var(--c-green);
  opacity: 1;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.8rem var(--space-md);
  gap: var(--space-md);
  min-height: 80px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1100;
}

.logo-mark {
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--c-red) 0%, var(--c-wine) 100%);
  clip-path: polygon(20% 0%, 80% 0%, 100% 40%, 70% 100%, 30% 100%, 0% 40%);
  position: relative;
  flex-shrink: 0;
  box-shadow: 0 0 24px rgba(230, 57, 70, 0.35);
}

.logo-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--c-black);
  clip-path: polygon(18% 0%, 82% 0%, 100% 35%, 65% 100%, 35% 100%, 0% 35%);
}

.logo-text {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 900;
  font-style: italic;
  color: var(--c-fog);
  letter-spacing: 0.04em;
  line-height: 1;
}

.logo-text::first-letter {
  color: var(--c-red);
}

.logo-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-top: 0.2rem;
}

.brand-logo--footer .logo-text {
  font-size: 1.4rem;
}

.brand-logo--footer .logo-mark {
  width: 40px;
  height: 40px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-silver);
  border-radius: 30px;
  border: 1px solid transparent;
  position: relative;
  transition: all var(--transition);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-link::before {
  content: attr(data-index);
  display: none;
}

.nav-link:hover {
  color: var(--c-fog);
  border-color: rgba(244, 162, 97, 0.6);
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.15), rgba(244, 162, 97, 0.08));
  box-shadow: 0 0 20px rgba(230, 57, 70, 0.15);
  transform: translateY(-2px);
}

.nav-link[aria-current="page"] {
  color: var(--c-fog);
  background: linear-gradient(135deg, var(--c-red), var(--c-wine));
  border-color: var(--c-red);
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 1100;
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #0A0E17 0%, #0A0E17 60%, #170E14 80%, #1A1015 100%);
  border-top: 1px solid rgba(230, 57, 70, 0.4);
  overflow: hidden;
  padding-top: var(--space-lg);
}

.footer-watermark {
  position: absolute;
  inset: auto 0 0 0;
  height: 130px;
  background: radial-gradient(ellipse at 20% 100%, rgba(114, 47, 55, 0.4) 0%, transparent 50%);
  mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.4), transparent);
  pointer-events: none;
}

.footer-main {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1fr;
  gap: var(--space-lg);
}

.footer-brand__desc {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  max-width: 380px;
  opacity: 0.85;
}

.footer-title {
  font-size: 1rem;
  font-weight: 900;
  font-style: italic;
  margin-bottom: var(--space-sm);
  color: var(--c-gold);
  position: relative;
  padding-bottom: 0.55rem;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-red), var(--c-gold));
  border-radius: 2px;
}

.footer-list li {
  margin-bottom: 0.55rem;
}

.footer-list a {
  font-size: 0.9rem;
  opacity: 0.85;
}

.footer-list a:hover {
  opacity: 1;
}

.footer-list--contact li {
  font-size: 0.9rem;
  opacity: 0.85;
}

.footer-contact__note {
  font-size: 0.75rem;
  opacity: 0.5;
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
}

.footer-bottom {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-md);
  border-top: 1px solid rgba(192, 200, 214, 0.1);
  margin-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  opacity: 0.75;
  font-family: var(--font-mono);
}

.footer-bottom a {
  font-size: 0.8rem;
}

/* ===== Layout Utilities ===== */
.main-content {
  min-height: 60vh;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: 860px;
}

.container--wide {
  max-width: 1600px;
}

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

.section--tight {
  padding: var(--space-md) 0;
}

.section--alt {
  background: linear-gradient(180deg, var(--c-black) 0%, var(--c-teal) 130%);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 30px;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--c-red), #C02736);
  color: var(--c-fog);
  box-shadow: 0 4px 20px rgba(230, 57, 70, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(230, 57, 70, 0.5);
  color: var(--c-fog);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.btn--ghost:hover {
  background: rgba(244, 162, 97, 0.1);
  transform: translateY(-2px);
  color: var(--c-fog);
}

.btn--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

/* ===== Image Frame ===== */
.img-frame {
  position: relative;
  background: linear-gradient(145deg, var(--c-teal), var(--c-black));
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 200px;
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.15), rgba(0, 0, 0, 0.6));
  transition: opacity var(--transition);
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(100, 255, 218, 0.25);
  border-radius: calc(var(--radius) - 8px);
  pointer-events: none;
  transition: border-color var(--transition);
}

.img-frame:hover::after {
  border-color: rgba(100, 255, 218, 0.7);
}

.img-frame--slant {
  clip-path: polygon(0 0, calc(100% - 2rem) 0, 100% 2rem, 100% 100%, 2rem 100%, 0 calc(100% - 2rem));
  border-radius: var(--radius-sm);
}

.img-frame--fill {
  position: absolute;
  inset: 0;
  min-height: 100%;
}

.img-frame-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.img-frame:hover .img-frame-bg {
  transform: scale(1.05);
}

/* ===== Section Index / Scroll Spy ===== */
.section-index {
  position: fixed;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  pointer-events: none;
}

.section-index__item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  pointer-events: auto;
  writing-mode: vertical-rl;
  padding: 0.45rem 0.35rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--c-silver);
  opacity: 0.45;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.section-index__item::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-silver);
  transition: all 0.3s ease;
}

.section-index__item:hover {
  opacity: 0.9;
  color: var(--c-gold);
}

.section-index__item.is-active {
  opacity: 1;
  color: var(--c-green);
  border-color: rgba(100, 255, 218, 0.4);
}

.section-index__item.is-active::before {
  background: var(--c-green);
  box-shadow: 0 0 10px var(--c-green);
}

/* ===== Data Card ===== */
.data-card {
  background: linear-gradient(155deg, rgba(31, 58, 61, 0.5), rgba(10, 14, 23, 0.9));
  border: 1px solid rgba(100, 255, 218, 0.15);
  border-radius: var(--radius);
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.data-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 45%, var(--c-red) 45%, var(--c-red) 55%, transparent 55%);
  opacity: 0.25;
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-green);
  box-shadow: var(--shadow-card);
}

.data-card__label {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.data-card__label::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--c-red);
  border-radius: 50%;
  animation: 2s pulse ease-in-out infinite;
}

.data-card__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--c-green);
  line-height: 1.1;
  text-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
  font-variant-numeric: tabular-nums;
}

.data-card__unit {
  font-size: 1rem;
  color: var(--c-silver);
  margin-left: 0.3rem;
}

.data-card__meta {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--c-silver);
  opacity: 0.75;
}

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal--left {
  transform: translateX(-32px);
}

.reveal--right {
  transform: translateX(32px);
}

.reveal--up {
  transform: translateY(40px);
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  right: 1.6rem;
  bottom: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-red), var(--c-wine));
  color: var(--c-fog);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 6px 24px rgba(230, 57, 70, 0.4);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  z-index: 1100;
}

.back-to-top:hover {
  box-shadow: 0 10px 32px rgba(230, 57, 70, 0.6);
  color: var(--c-fog);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: var(--space-sm) 0;
  color: var(--c-silver);
  opacity: 0.7;
}

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

.breadcrumb li::after {
  content: "/";
  margin-left: 0.6rem;
  color: var(--c-gold);
  opacity: 0.5;
}

.breadcrumb li:last-child::after {
  content: "";
}

.breadcrumb a {
  color: var(--c-silver);
  opacity: 0.7;
}

.breadcrumb a:hover {
  color: var(--c-red);
  opacity: 1;
}

.breadcrumb [aria-current="page"] {
  color: var(--c-green);
  opacity: 1;
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  background: radial-gradient(ellipse at 70% 30%, rgba(114, 47, 55, 0.4) 0%, transparent 50%),
              linear-gradient(120deg, var(--c-black) 0%, #101824 60%, var(--c-teal) 160%);
  padding: var(--space-xl) 0;
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.page-hero__inner {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--c-green);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.hero-eyebrow::before {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-green));
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1.1;
  margin-bottom: 1.4rem;
}

.hero-title .accent {
  color: var(--c-red);
  position: relative;
}

.hero-title .accent::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 10px;
  background: rgba(230, 57, 70, 0.15);
  clip-path: polygon(0 40%, 100% 0%, 100% 100%, 0 70%);
  z-index: -1;
}

.hero-lead {
  font-size: 1.05rem;
  max-width: 520px;
  opacity: 0.85;
  margin-bottom: var(--space-md);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.hero-meta__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.9rem;
  background: rgba(31, 58, 61, 0.4);
  border: 1px solid rgba(244, 162, 97, 0.25);
  border-radius: 30px;
}

.hero-meta__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 8px var(--c-green);
  animation: 2s pulse ease-in-out infinite;
}

.hero-meta__dot--red {
  background: var(--c-red);
  box-shadow: 0 0 8px var(--c-red);
  animation-delay: 0.5s;
}

/* ===== State panel ===== */
.state-panel {
  background: rgba(10, 14, 23, 0.75);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
}

/* ===== Keyframes ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .page-hero__inner {
    grid-template-columns: 1fr;
  }
  .section-index {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --space-lg: 2.5rem;
    --space-xl: 4.5rem;
  }

  .header-top {
    padding: 0.45rem var(--space-sm);
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .header-main {
    gap: var(--space-sm);
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    background: rgba(230, 57, 70, 0.2);
    border: 1px solid rgba(244, 162, 97, 0.3);
  }

  .nav-toggle__bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--c-fog);
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  .nav-toggle__label {
    font-size: 0.65rem;
    color: var(--c-silver);
    letter-spacing: 0.1em;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(80vw, 340px);
    height: 100vh;
    height: 100dvh;
    background: linear-gradient(180deg, #0A0E17 0%, #131A2C 100%);
    padding: 6rem var(--space-md) var(--space-md);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.7);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.4s ease;
    z-index: 1050;
    border-left: 1px solid rgba(230, 57, 70, 0.3);
    align-items: flex-start;
    overflow-y: auto;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.8rem;
  }

  .nav-link {
    display: block;
    padding: 0.8rem 1rem;
    font-size: 1.05rem;
    border-radius: var(--radius-sm);
    text-align: left;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) 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(-6px) rotate(-45deg);
  }

  .back-to-top {
    bottom: 1.2rem;
    right: 1.2rem;
  }
}

@media (max-width: 520px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .progress-bar,
  .back-to-top {
    transition: none;
  }

  .data-card__label::before,
  .hero-meta__dot {
    animation: none !important;
  }
}