/* ============ 1. Reset & Design Tokens ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #0A1E3C;
  --color-primary-light: #12294D;
  --color-accent: #FFD700;
  --color-accent-secondary: #FF6B35;
  --color-bg-light: #F5F7FA;
  --color-white: #FFFFFF;
  --color-text-dark: #1A1A1A;
  --color-text-muted: #B0B8C4;
  --color-positive: #00C48C;
  --color-negative: #FF4D4F;
  --color-bg-dark: #1A1A1A;

  --font-heading: 'Impact', 'Arial Black', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-number: 'Roboto Mono', 'SF Mono', monospace;

  --h1-size: 3.5rem;
  --h2-size: 2.5rem;
  --h3-size: 1.8rem;
  --body-size: 1.1rem;
  --small-size: 0.9rem;

  --container-max: 1240px;
  --radius: 12px;
  --radius-sm: 6px;

  --speed-normal: 0.25s;
  --speed-slow: 0.4s;
}

/* ============ 2. Base & Typography ============ */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul[class],
ol[class] {
  list-style: none;
}

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

h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: inherit;
  line-height: 1.15;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

::selection {
  background: var(--color-accent);
  color: var(--color-primary);
}

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

/* ============ 3. Layout System ============ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 2rem;
}

.section {
  padding-block: 4rem;
}

.section-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.section-light {
  background: var(--color-bg-light);
  color: var(--color-text-dark);
}

.section-title {
  font-size: var(--h2-size);
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

.section-number {
  display: block;
  font-family: var(--font-number);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section-light .section-number {
  color: var(--color-accent-secondary);
}

.section-intro {
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  max-width: 60em;
}

.section-light .section-intro {
  color: var(--color-text-muted);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============ 4. Page Header ============ */
.page-header {
  padding-block: 3rem 2rem;
  text-align: center;
}

.page-header .page-title {
  font-size: var(--h1-size);
  line-height: 1.1;
}

.page-header .page-subtitle {
  color: rgba(255, 255, 255, 0.6);
  font-size: 1.1rem;
  margin-top: 0.75rem;
}

.section-light .page-header .page-subtitle {
  color: var(--color-text-muted);
}

/* ============ 5. Skip Link & Main ============ */
.skip-link {
  position: absolute;
  top: 0;
  left: -9999px;
  z-index: 200;
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 8px 0;
}

.skip-link:focus-visible {
  left: 0;
}

#main-content {
  scroll-margin-top: 10rem;
}

#main-content:focus {
  outline: none;
}

/* ============ 6. Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: box-shadow var(--speed-slow) ease;
}

.site-header[data-scrolled] {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
  z-index: 120;
}

.header-topbar {
  position: relative;
  overflow: hidden;
  max-height: 80px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  transition: max-height var(--speed-slow) ease, opacity var(--speed-slow) ease;
}

.site-header[data-scrolled] .header-topbar {
  max-height: 0;
  opacity: 0;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.5rem;
}

.topbar-note {
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.topbar-trust {
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.masthead {
  padding-block: 2.25rem 1.75rem;
  text-align: center;
  position: relative;
  transition: padding var(--speed-slow) ease;
}

.site-header[data-scrolled] .masthead {
  padding-block: 1rem 0.75rem;
}

.masthead-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.15em;
  text-decoration: none;
  transition: opacity var(--speed-normal) ease;
}

.masthead-brand:hover {
  opacity: 0.85;
}

.brand-mark {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  transition: font-size var(--speed-slow) ease;
}

.brand-num {
  color: var(--color-accent-secondary);
}

.brand-cn {
  font-family: var(--font-body);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-white);
  letter-spacing: 0.14em;
  transition: font-size var(--speed-slow) ease;
}

.site-header[data-scrolled] .brand-mark {
  font-size: 2.2rem;
}

.site-header[data-scrolled] .brand-cn {
  font-size: 1.2rem;
}

.masthead-en {
  margin-top: 0.6rem;
  font-family: var(--font-number);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  transition: opacity var(--speed-slow) ease;
}

.site-header[data-scrolled] .masthead-en {
  opacity: 0;
}

.masthead::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  margin: 1.25rem auto 0;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
  transform: skewX(-24deg);
  transition: margin var(--speed-slow) ease, opacity var(--speed-slow) ease;
}

.site-header[data-scrolled] .masthead::after {
  margin-top: 0.6rem;
  opacity: 0.7;
}

.site-nav {
  background: #071530;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: box-shadow var(--speed-normal) ease;
}

.site-nav[data-open] {
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-list {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-item a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.85rem 0.75rem;
  color: rgba(255, 255, 255, 0.82);
  font-weight: 500;
  font-size: 0.98rem;
  text-decoration: none;
  position: relative;
  transition: color var(--speed-normal) ease;
}

.nav-index {
  font-family: var(--font-number);
  font-size: 0.68rem;
  color: var(--color-accent);
  opacity: 0.6;
  letter-spacing: 0.08em;
  transition: opacity var(--speed-normal) ease;
}

.nav-label {
  display: inline;
  line-height: 1.3;
}

.nav-item a:hover {
  color: var(--color-accent);
}

.nav-item a:hover .nav-index {
  opacity: 1;
}

.nav-item a::after {
  content: '';
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--speed-normal) ease;
}

.nav-item a:hover::after,
.nav-item a:focus-visible::after,
.nav-item a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-item a[aria-current="page"] {
  color: var(--color-accent);
}

.nav-item a[aria-current="page"] .nav-index {
  color: var(--color-accent-secondary);
  opacity: 1;
}

.nav-cta {
  flex-shrink: 0;
  padding: 0.5rem 1.1rem;
  font-size: 0.88rem;
}

.nav-toggle {
  display: none;
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  z-index: 110;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  padding: 0.4rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: background var(--speed-normal) ease, border-color var(--speed-normal) ease, color var(--speed-normal) ease;
}

.nav-toggle:hover {
  background: rgba(255, 215, 0, 0.15);
  border-color: var(--color-accent);
}

.nav-toggle[aria-expanded="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
  flex-shrink: 0;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--speed-normal) ease, opacity var(--speed-normal) ease;
}

.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);
}

.nav-toggle-text {
  font-size: 0.85rem;
}

/* ============ 7. Footer ============ */
.site-footer {
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 3rem;
  padding-block: 3.5rem 2.5rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
}

.footer-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.1em;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-white);
  text-decoration: none;
  transition: opacity var(--speed-normal) ease;
}

.footer-logo:hover {
  opacity: 0.85;
}

.footer-logo-mark {
  color: var(--color-accent);
}

.footer-logo-mark span {
  color: var(--color-accent-secondary);
}

.footer-logo-cn {
  font-size: 1.4rem;
  letter-spacing: 0.08em;
}

.footer-tagline {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.footer-desc {
  color: rgba(255, 255, 255, 0.65);
  font-size: var(--small-size);
  line-height: 1.7;
  max-width: 28em;
  margin-top: 0.5rem;
}

.footer-column-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
  display: grid;
  gap: 0.6rem;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
  transition: color var(--speed-normal) ease;
}

.footer-links a::before {
  content: '→';
  font-family: var(--font-number);
  color: var(--color-accent-secondary);
  transition: transform var(--speed-normal) ease;
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-links a:hover::before {
  transform: translateX(3px);
}

.footer-contact-list {
  display: grid;
  gap: 0.75rem;
  list-style: none;
}

.footer-contact-item {
  display: grid;
  gap: 0.15rem;
}

.footer-contact-label {
  font-family: var(--font-number);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.footer-contact-value {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.25rem;
}

.footer-copyright,
.footer-icp,
.footer-note {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============ 8. Buttons ============ */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--speed-normal) ease, color var(--speed-normal) ease, border-color var(--speed-normal) ease, transform var(--speed-normal) ease;
}

.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.btn-accent:hover {
  background: transparent;
  color: var(--color-accent);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--color-white);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============ 9. Card ============ */
.card {
  background: var(--color-bg-light);
  color: var(--color-text-dark);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform var(--speed-normal) ease, box-shadow var(--speed-normal) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card .data-tag {
  margin-bottom: 0.75rem;
}

.card .data-list-row {
  border-bottom-color: rgba(0, 0, 0, 0.12);
}

.card .data-label {
  color: var(--color-text-muted);
}

.card .data-value {
  color: var(--color-primary);
}

/* ============ 10. Data Components ============ */
.data-tag {
  display: inline-block;
  padding: 0.25em 0.8em;
  font-family: var(--font-number);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-text-muted);
  border-radius: 100px;
  background: transparent;
}

.data-tag[data-tone="accent"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.data-tag[data-tone="positive"] {
  color: var(--color-positive);
  border-color: var(--color-positive);
}

.data-tag[data-tone="negative"] {
  color: var(--color-negative);
  border-color: var(--color-negative);
}

.data-list {
  display: grid;
  gap: 0.75rem;
}

.data-list-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
}

.data-label {
  font-family: var(--font-body);
  font-size: var(--small-size);
  color: rgba(255, 255, 255, 0.6);
}

.data-value {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-white);
}

.data-value[data-tone="accent"] {
  color: var(--color-accent);
}

.data-value[data-tone="positive"] {
  color: var(--color-positive);
}

.data-value[data-tone="negative"] {
  color: var(--color-negative);
}

/* ============ 11. Visual Frame ============ */
.visual-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, transparent 0%, rgba(255, 107, 53, 0.14) 80%),
    linear-gradient(45deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

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

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

.visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2rem 1rem 0.75rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
  color: var(--color-white);
  font-size: var(--small-size);
  line-height: 1.5;
}

/* ============ 12. Breadcrumb ============ */
.breadcrumb {
  margin-block: 1rem 2rem;
  color: var(--color-text-muted);
  font-size: var(--small-size);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--color-text-muted);
  opacity: 0.6;
}

.breadcrumb-link {
  color: var(--color-text-muted);
  transition: color var(--speed-normal) ease;
}

.breadcrumb-link:hover {
  color: var(--color-accent);
}

.breadcrumb-current {
  color: var(--color-white);
  font-weight: 600;
}

.section-light .breadcrumb-current {
  color: var(--color-text-dark);
}

.section-light .breadcrumb-link {
  color: var(--color-text-muted);
}

/* ============ 13. Content Map ============ */
.content-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.content-map-group {
  padding-inline: 1rem;
}

.content-map-group-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.content-map-list {
  display: grid;
  gap: 0.6rem;
  list-style: none;
}

.content-map-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  transition: color var(--speed-normal) ease, transform var(--speed-normal) ease;
}

.content-map-link::before {
  content: '→';
  font-family: var(--font-number);
  color: var(--color-accent-secondary);
}

.content-map-link:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

/* ============ 14. Divider & Quote ============ */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  border: none;
  margin-block: 2rem;
}

.section-light .divider {
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.15), transparent);
}

.quote-block {
  padding: 2rem;
  border-left: 4px solid var(--color-accent);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.quote-text {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-white);
}

.quote-source {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-number);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ============ 15. Responsive ============ */
@media (max-width: 992px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }

  .content-map {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding-inline: 1.25rem;
  }

  .section {
    padding-block: 2.5rem;
  }

  .header-topbar {
    max-height: 40px;
  }

  .topbar-trust {
    display: none;
  }

  .topbar-inner {
    justify-content: center;
    padding-block: 0.35rem;
  }

  .masthead {
    padding-block: 1.5rem 1.25rem;
  }

  .site-header[data-scrolled] .masthead {
    padding-block: 0.85rem 0.65rem;
  }

  .brand-mark {
    font-size: 2.5rem;
  }

  .brand-cn {
    font-size: 1.3rem;
  }

  .site-header[data-scrolled] .brand-mark {
    font-size: 1.8rem;
  }

  .site-header[data-scrolled] .brand-cn {
    font-size: 1rem;
  }

  .masthead-en {
    letter-spacing: 0.2em;
    font-size: 0.65rem;
    margin-top: 0.4rem;
  }

  .masthead::after {
    width: 40px;
    height: 3px;
    margin-top: 0.9rem;
  }

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

  .site-nav {
    display: none;
  }

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

  .nav-inner {
    flex-direction: column;
    gap: 0;
    padding-block: 0.75rem;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-item a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 0.5rem;
    font-size: 1.05rem;
  }

  .nav-item a::after {
    left: 0;
    right: 0;
    height: 2px;
  }

  .nav-cta {
    width: 100%;
    margin-top: 0.75rem;
    text-align: center;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-block: 2.5rem 1.5rem;
  }

  .footer-brand-col {
    grid-column: auto;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
  }

  #main-content {
    scroll-margin-top: 6rem;
  }
}

@media (max-width: 640px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .page-header {
    padding-block: 2rem 1.5rem;
  }

  .page-header .page-title {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .content-map {
    padding: 1.25rem;
  }

  .content-map-group {
    padding-inline: 0;
  }
}

@media (max-width: 480px) {
  .masthead-en {
    display: none;
  }

  .brand-mark {
    font-size: 2rem;
  }

  .brand-cn {
    font-size: 1.1rem;
  }
}

/* ============ 16. 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;
  }

  .card:hover {
    transform: none;
  }

  .site-header[data-scrolled] {
    box-shadow: none;
  }
}