:root {
  --primary: #1f3d7a;
  --primary-light: #2a4f9a;
  --primary-dark: #142a54;
  --accent: #f2b705;
  --accent-hover: #d9a404;
  --bg: #f4f6fb;
  --bg-alt: #eaeef7;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.55);
  --text: #1c2333;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --shadow: 0 8px 32px rgba(31, 61, 122, 0.10);
  --shadow-hover: 0 16px 48px rgba(31, 61, 122, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --gradient-banner: linear-gradient(135deg, #1f3d7a 0%, #2a4f9a 40%, #3b6cc7 70%, #5a8de0 100%);
  --gradient-accent: linear-gradient(135deg, #f2b705 0%, #f7cc4a 100%);
  --glass-blur: 18px;
  --glass-bg: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.30);
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #5a8de0;
    --primary-light: #7aaaf0;
    --primary-dark: #2a4f9a;
    --accent: #f7cc4a;
    --accent-hover: #f2b705;
    --bg: #0d1117;
    --bg-alt: #161b22;
    --card-bg: rgba(30, 38, 52, 0.78);
    --card-border: rgba(255, 255, 255, 0.10);
    --text: #e6edf3;
    --text-secondary: #b0bec5;
    --text-muted: #7d8a99;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.40);
    --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.55);
    --gradient-banner: linear-gradient(135deg, #0d1117 0%, #161b22 35%, #1f3d7a 70%, #2a4f9a 100%);
    --glass-bg: rgba(30, 38, 52, 0.45);
    --glass-border: rgba(255, 255, 255, 0.08);
  }
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(42, 79, 154, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(242, 183, 5, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

@media (prefers-color-scheme: dark) {
  body::before {
    background:
      radial-gradient(ellipse at 20% 0%, rgba(90, 141, 224, 0.06) 0%, transparent 50%),
      radial-gradient(ellipse at 80% 100%, rgba(247, 204, 74, 0.04) 0%, transparent 50%);
  }
}

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

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

ul, ol {
  list-style: none;
}

/* ========== HEADER ========== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: 0 4px 24px rgba(31, 61, 122, 0.10);
}

@media (prefers-color-scheme: dark) {
  #site-header.scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  }
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand svg {
  border-radius: 8px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: 0 4px 16px rgba(31, 61, 122, 0.30);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-text strong {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

@media (prefers-color-scheme: dark) {
  .brand-text strong {
    color: var(--accent);
  }
}

.brand-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

nav[aria-label="主导航"] ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition), left var(--transition);
}

nav[aria-label="主导航"] a:hover {
  color: var(--primary);
  background: rgba(31, 61, 122, 0.06);
  transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
  nav[aria-label="主导航"] a:hover {
    color: var(--accent);
    background: rgba(247, 204, 74, 0.08);
  }
}

nav[aria-label="主导航"] a:hover::after {
  width: 60%;
  left: 20%;
}

/* ========== MAIN ========== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  position: relative;
  z-index: 1;
}

/* ========== SECTIONS ========== */
section {
  margin-bottom: 2.5rem;
  padding: 2rem 2rem;
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.7s ease forwards;
}

section:nth-child(1) { animation-delay: 0.05s; }
section:nth-child(2) { animation-delay: 0.10s; }
section:nth-child(3) { animation-delay: 0.15s; }
section:nth-child(4) { animation-delay: 0.20s; }
section:nth-child(5) { animation-delay: 0.25s; }
section:nth-child(6) { animation-delay: 0.30s; }
section:nth-child(7) { animation-delay: 0.35s; }
section:nth-child(8) { animation-delay: 0.40s; }
section:nth-child(9) { animation-delay: 0.45s; }
section:nth-child(10) { animation-delay: 0.50s; }

section:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section:target {
  scroll-margin-top: 80px;
}

/* ========== INTRO BANNER ========== */
#intro {
  background: var(--gradient-banner);
  color: #fff;
  border: none;
  position: relative;
  overflow: hidden;
  padding: 3rem 2.5rem;
}

#intro::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(242, 183, 5, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulseGlow 6s ease-in-out infinite;
}

#intro::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulseGlow 8s ease-in-out infinite reverse;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.15); opacity: 1; }
}

#intro h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 1.25rem;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

#intro p {
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 1rem;
  opacity: 0.92;
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.intro-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  position: relative;
  z-index: 1;
}

.intro-facts > div {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.20);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.intro-facts > div:hover {
  background: rgba(255, 255, 255, 0.20);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.intro-facts strong {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.75;
  font-weight: 600;
}

.intro-facts span {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

/* ========== HEADINGS ========== */
h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.65rem;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
  letter-spacing: 0.01em;
  transition: color var(--transition), border-color var(--transition);
}

@media (prefers-color-scheme: dark) {
  h2 {
    color: var(--accent);
    border-bottom-color: var(--primary);
  }
}

h3 {
  font-size: 1.15rem;
  font-weight: 650;
  color: var(--text);
  margin: 1.5rem 0 0.65rem;
  padding-left: 0.85rem;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
  transition: border-color var(--transition), color var(--transition);
}

h3:hover {
  border-left-color: var(--accent);
}

@media (prefers-color-scheme: dark) {
  h3 {
    border-left-color: var(--accent);
  }
  h3:hover {
    border-left-color: var(--primary);
  }
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-light);
  margin: 1.1rem 0 0.4rem;
  transition: color var(--transition);
}

@media (prefers-color-scheme: dark) {
  h4 {
    color: var(--accent);
  }
}

p {
  margin-bottom: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.9;
  transition: color var(--transition);
}

/* ========== TIMELINE ========== */
#timeline {
  position: relative;
}

#timeline h3 {
  position: relative;
  padding-left: 1.5rem;
}

#timeline h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(242, 183, 5, 0.20);
  transition: box-shadow var(--transition), transform var(--transition);
}

#timeline h3:hover::before {
  box-shadow: 0 0 0 7px rgba(242, 183, 5, 0.30);
  transform: translateY(-50%) scale(1.15);
}

#timeline h4 {
  background: var(--bg-alt);
  display: inline-block;
  padding: 0.25rem 0.85rem;
  border-radius: 20px;
  font-size: 0.9rem;
  transition: background var(--transition), transform var(--transition);
}

#timeline h4:hover {
  background: var(--primary);
  color: #fff;
  transform: translateX(4px);
}

@media (prefers-color-scheme: dark) {
  #timeline h4:hover {
    background: var(--accent);
    color: #0d1117;
  }
}

/* ========== ARTICLES ========== */
#articles {
  display: block;
}

#articles > article {
  background: var(--bg-alt);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

#articles > article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 0 4px 4px 0;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

#articles > article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(31, 61, 122, 0.20);
}

#articles > article:hover::before {
  transform: scaleY(1);
}

#articles > article h3 {
  border-left: none;
  padding-left: 0;
  margin-top: 0;
  font-size: 1.08rem;
}

#articles > article h3:hover {
  border-left: none;
}

#articles time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--card-bg);
  padding: 0.15rem 0.65rem;
  border-radius: 20px;
  margin-bottom: 0.5rem;
  transition: background var(--transition), color var(--transition);
}

#articles > article:hover time {
  background: var(--primary);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  #articles > article:hover time {
    background: var(--accent);
    color: #0d1117;
  }
}

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 0.5rem;
  transition: color var(--transition), gap var(--transition);
}

#articles > article a::after {
  content: "→";
  transition: transform var(--transition);
}

#articles > article a:hover {
  color: var(--accent);
  gap: 0.55rem;
}

#articles > article a:hover::after {
  transform: translateX(3px);
}

@media (prefers-color-scheme: dark) {
  #articles > article a {
    color: var(--accent);
  }
  #articles > article a:hover {
    color: var(--primary-light);
  }
}

/* ========== REVIEWS ========== */
#reviews blockquote {
  background: var(--bg-alt);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  top: 0.25rem;
  right: 1rem;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.10;
  font-family: Georgia, serif;
  transition: opacity var(--transition), transform var(--transition);
}

#reviews blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-left-color: var(--primary);
}

#reviews blockquote:hover::before {
  opacity: 0.20;
  transform: scale(1.1);
}

#reviews blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

#reviews blockquote footer {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========== NEWS ========== */
#news h3 {
  position: relative;
}

#news h3::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0.85rem;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

#news h3:hover::after {
  width: calc(100% - 0.85rem);
}

/* ========== FAQ ========== */
#faq h3 {
  cursor: pointer;
  position: relative;
  padding-right: 2rem;
  transition: color var(--transition);
}

#faq h3::after {
  content: "+";
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition), color var(--transition);
}

#faq h3:hover {
  color: var(--primary);
}

#faq h3:hover::after {
  transform: translateY(-50%) rotate(90deg);
  color: var(--accent);
}

#faq h3 + p {
  padding-left: 0.85rem;
  border-left: 2px solid transparent;
  transition: border-color var(--transition), padding-left var(--transition);
}

#faq h3:hover + p {
  border-left-color: var(--accent);
  padding-left: 1.1rem;
}

@media (prefers-color-scheme: dark) {
  #faq h3::after {
    color: var(--accent);
  }
  #faq h3:hover {
    color: var(--accent);
  }
  #faq h3:hover::after {
    color: var(--primary-light);
  }
}

/* ========== HOWTO ========== */
#howto ol {
  counter-reset: step-counter;
  padding-left: 0;
}

#howto ol li {
  counter-increment: step-counter;
  position: relative;
  padding: 0.75rem 1rem 0.75rem 3.2rem;
  margin-bottom: 0.6rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

#howto ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  background: var(--gradient-accent);
  color: #1c2333;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  background: var(--card-bg);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
  box-shadow: 0 0 0 4px rgba(242, 183, 5, 0.20);
}

/* ========== CONTACT ========== */
#contact p {
  padding: 0.35rem 0;
}

#contact h3 + p {
  display: inline-block;
  background: var(--bg-alt);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  transition: background var(--transition), transform var(--transition);
}

#contact h3 + p:hover {
  background: var(--primary);
  color: #fff;
  transform: translateX(4px);
}

@media (prefers-color-scheme: dark) {
  #contact h3 + p:hover {
    background: var(--accent);
    color: #0d1117;
  }
}

/* ========== SITEMAP & LINKS ========== */
#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}

#sitemap a,
#links a {
  display: block;
  padding: 0.6rem 1rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

#sitemap a:hover,
#links a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(31, 61, 122, 0.25);
}

@media (prefers-color-scheme: dark) {
  #sitemap a:hover,
  #links a:hover {
    background: var(--accent);
    color: #0d1117;
    box-shadow: 0 6px 20px rgba(247, 204, 74, 0.20);
  }
}

/* ========== FOOTER ========== */
footer {
  background: var(--gradient-banner);
  color: rgba(255, 255, 255, 0.88);
  padding: 3rem 1.5rem 2rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(242, 183, 5, 0.10) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

footer section {
  max-width: 1200px;
  margin: 0 auto 1.5rem;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  opacity: 1;
  transform: none;
  animation: none;
  box-shadow: none;
  transition: background var(--transition), transform var(--transition);
}

footer section:hover {
  background: rgba(255, 255, 255, 0.10);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

footer h2 {
  font-size: 1rem;
  color: var(--accent);
  border-bottom: 2px solid rgba(242, 183, 5, 0.40);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
}

footer p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 0.4rem;
}

footer > p:last-child {
  max-width: 1200px;
  margin: 1.5rem auto 0;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.50);
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .intro-facts {
    grid-template-columns: repeat(2, 1fr);
  }

  #intro h1 {
    font-size: 1.7rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }

  nav[aria-label="主导航"] {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  nav[aria-label="主导航"]::-webkit-scrollbar {
    display: none;
  }

  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    gap: 0.15rem;
    padding-bottom: 0.25rem;
  }

  nav[aria-label="主导航"] a {
    white-space: nowrap;
    font-size: 0.8rem;
    padding: 0.4rem 0.7rem;
  }

  main {
    padding: 0 1rem 3rem;
  }

  section {
    padding: 1.5rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
  }

  #intro {
    padding: 2rem 1.5rem;
  }

  #intro h1 {
    font-size: 1.45rem;
  }

  #intro p {
    font-size: 0.925rem;
  }

  .intro-facts {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }

  .intro-facts > div {
    padding: 0.75rem 1rem;
  }

  .intro-facts span {
    font-size: 0.9rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  h3 {
    font-size: 1.05rem;
  }

  #articles > article {
    padding: 1rem 1.15rem;
  }

  #articles > article:hover {
    transform: translateX(3px);
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(2, 1fr);
  }

  footer {
    padding: 2rem 1rem 1.5rem;
  }

  footer section {
    padding: 1rem 1.15rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .brand-text strong {
    font-size: 1rem;
  }

  .brand-text span {
    font-size: 0.65rem;
  }

  #intro h1 {
    font-size: 1.3rem;
  }

  .intro-facts {
    grid-template-columns: 1fr 1fr;
  }

  .intro-facts > div {
    padding: 0.6rem 0.85rem;
  }

  .intro-facts strong {
    font-size: 0.7rem;
  }

  .intro-facts span {
    font-size: 0.82rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }

  #howto ol li {
    padding: 0.65rem 0.85rem 0.65rem 2.8rem;
  }

  #howto ol li::before {
    left: 0.65rem;
    width: 24px;
    height: 24px;
    font-size: 0.78rem;
  }
}

/* ========== 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;
  }

  section {
    opacity: 1;
    transform: none;
  }
}

/* ========== PRINT ========== */
@media print {
  #site-header,
  footer,
  nav {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
    opacity: 1;
    transform: none;
  }

  #intro {
    background: #1f3d7a;
    color: #fff;
  }
}