:root {
  --brand-primary: #FF2C55;
  --brand-secondary: #FF6B9D;
  --brand-accent: #7C3AED;
  --brand-gradient: linear-gradient(135deg, #FF2C55 0%, #FF6B9D 45%, #7C3AED 100%);
  --brand-gradient-soft: linear-gradient(135deg, rgba(255,44,85,.12) 0%, rgba(124,58,237,.12) 100%);
  --bg-body: #FFF5F7;
  --bg-surface: #FFFFFF;
  --bg-surface-2: #FFF0F3;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.55);
  --text-primary: #1A1024;
  --text-secondary: #5A4A63;
  --text-muted: #8B7A94;
  --border-color: rgba(255, 44, 85, 0.14);
  --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.06);
  --shadow-md: 0 8px 28px rgba(255, 44, 85, 0.10);
  --shadow-lg: 0 18px 48px rgba(124, 58, 237, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --bg-body: #14091C;
  --bg-surface: #1E1029;
  --bg-surface-2: #28143A;
  --bg-glass: rgba(30, 16, 41, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text-primary: #F5EEF8;
  --text-secondary: #C7B3D4;
  --text-muted: #8B7A94;
  --border-color: rgba(255, 107, 157, 0.18);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-body);
  background-image:
    radial-gradient(circle at 8% 12%, rgba(255, 44, 85, 0.10) 0%, transparent 42%),
    radial-gradient(circle at 92% 8%, rgba(124, 58, 237, 0.10) 0%, transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(255, 107, 157, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

h1 { font-size: clamp(1.75rem, 4.5vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3.2vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.4vw, 1.4rem); }
h4 { font-size: 1.05rem; }

p {
  color: var(--text-secondary);
}

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

/* ===== Header ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition), box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  padding: 4px 2px;
  transition: transform var(--transition), filter var(--transition);
  flex-shrink: 0;
}

.logo:hover {
  transform: scale(1.06);
  filter: drop-shadow(0 4px 12px rgba(255, 44, 85, 0.4));
}

#site-header nav {
  flex: 1 1 auto;
}

#site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

#site-header nav a {
  display: inline-block;
  padding: 7px 13px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 999px;
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

#site-header nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition);
}

#site-header nav a:hover {
  color: var(--brand-primary);
  background: var(--brand-gradient-soft);
  transform: translateY(-1px);
}

#site-header nav a:hover::after {
  width: 60%;
}

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
  flex-shrink: 0;
}

#site-header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#site-search {
  width: 160px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  outline: none;
  transition: width var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#site-search::placeholder {
  color: var(--text-muted);
}

#site-search:focus {
  width: 220px;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(255, 44, 85, 0.14);
}

#site-header form[role="search"] button {
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: var(--brand-gradient);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

#site-header form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 44, 85, 0.35);
  filter: brightness(1.05);
}

#theme-toggle,
#menu-toggle {
  padding: 8px 14px;
  font-size: 0.84rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
}

#menu-toggle {
  display: none;
}

/* ===== Main ===== */
main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

main > nav[aria-label="面包屑"] {
  padding: 18px 0 6px;
}

main > nav[aria-label="面包屑"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

main > nav[aria-label="面包屑"] li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--brand-primary);
  font-weight: 700;
}

main > nav[aria-label="面包屑"] a {
  color: var(--text-muted);
}

main > nav[aria-label="面包屑"] a:hover {
  color: var(--brand-primary);
}

/* ===== Sections ===== */
main > section {
  margin-top: 48px;
  padding: 36px clamp(18px, 4vw, 44px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1), box-shadow var(--transition);
}

main > section.visible {
  opacity: 1;
  transform: translateY(0);
}

main > section:hover {
  box-shadow: var(--shadow-md);
}

main > section > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 22px;
}

main > section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: var(--brand-gradient);
}

main > section > h3 {
  margin-top: 26px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

main > section > h3::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 1em;
  margin-right: 10px;
  vertical-align: -0.12em;
  border-radius: 3px;
  background: var(--brand-gradient);
}

main > section > h4 {
  margin-top: 20px;
  margin-bottom: 6px;
  color: var(--brand-primary);
}

main > section > p {
  margin-bottom: 12px;
}

/* ===== Hero ===== */
#hero {
  position: relative;
  margin-top: 24px;
  padding: clamp(32px, 6vw, 64px) clamp(20px, 5vw, 56px);
  background: var(--brand-gradient);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  color: #fff;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.28) 0%, transparent 42%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.18) 0%, transparent 45%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  top: -60%;
  right: -20%;
  width: 60%;
  height: 180%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  transform: rotate(18deg);
  animation: heroShine 7s ease-in-out infinite;
  pointer-events: none;
}

@keyframes heroShine {
  0%, 100% { transform: translateX(-40%) rotate(18deg); opacity: 0.3; }
  50% { transform: translateX(40%) rotate(18deg); opacity: 0.7; }
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
  margin-bottom: 18px;
}

#hero > p {
  color: rgba(255, 255, 255, 0.94);
  max-width: 900px;
  margin-bottom: 14px;
  font-size: 1.02rem;
}

#hero > p a {
  display: inline-block;
  padding: 9px 20px;
  margin: 6px 8px 6px 0;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--brand-primary);
  background: rgba(255, 255, 255, 0.94);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

#hero > p a:hover {
  transform: translateY(-3px);
  background: #fff;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.22);
  color: var(--brand-accent);
}

/* ===== Banner ===== */
#banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin: 30px 0;
}

#banner article {
  padding: 22px 20px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius-md);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

#banner article:hover {
  transform: translateY(-6px) scale(1.02);
  background: rgba(255, 255, 255, 0.26);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22);
}

#banner article h2 {
  font-size: 1.12rem;
  color: #fff;
  margin-bottom: 8px;
}

#banner article p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
}

/* ===== Stats ===== */
#hero dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

#hero dl > div {
  padding: 18px 16px;
  text-align: center;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition), background var(--transition);
}

#hero dl > div:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.24);
}

#hero dt {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 4px;
}

#hero dd {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

#hero dd span {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ===== Lists ===== */
#solutions ul,
#howto ul,
#howto ol,
#sitemap ul,
#links ul {
  display: grid;
  gap: 10px;
  margin: 14px 0;
}

#solutions ul li,
#howto ul li {
  position: relative;
  padding: 12px 16px 12px 44px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#solutions ul li::before,
#howto ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 14px;
  height: 14px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--brand-gradient);
  box-shadow: 0 0 0 4px rgba(255, 44, 85, 0.12);
}

#solutions ul li:hover,
#howto ul li:hover {
  transform: translateX(6px);
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
}

#howto ol {
  counter-reset: howto-step;
}

#howto ol li {
  position: relative;
  counter-increment: howto-step;
  padding: 14px 16px 14px 56px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 14px;
  top: 50%;
  width: 28px;
  height: 28px;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
  color: #fff;
  background: var(--brand-gradient);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(255, 44, 85, 0.3);
}

#howto ol li:hover {
  transform: translateX(6px);
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
}

/* ===== News & Articles ===== */
#news article,
#articles article {
  position: relative;
  padding: 22px 24px;
  margin-bottom: 16px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  overflow: hidden;
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--brand-gradient);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
  background: var(--bg-surface);
}

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

#news article h3,
#articles article h3 {
  font-size: 1.08rem;
  margin-bottom: 6px;
  transition: color var(--transition);
}

#news article:hover h3,
#articles article:hover h3 {
  color: var(--brand-primary);
}

#news article p,
#articles article p {
  font-size: 0.9rem;
  margin-bottom: 6px;
}

#news article p:first-of-type,
#articles article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

#news article a,
#articles article a {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--brand-primary);
  transition: transform var(--transition), letter-spacing var(--transition);
}

#news article a::after,
#articles article a::after {
  content: " →";
  transition: margin-left var(--transition);
}

#news article a:hover::after,
#articles article a:hover::after {
  margin-left: 4px;
}

#news article a:hover,
#articles article a:hover {
  transform: translateX(4px);
  letter-spacing: 0.02em;
}

/* ===== Cases ===== */
#cases blockquote {
  position: relative;
  padding: 22px 24px 22px 56px;
  margin: 16px 0;
  background: var(--brand-gradient-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 10px;
  font-size: 3.2rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--brand-primary);
  opacity: 0.5;
}

#cases blockquote p {
  font-size: 0.94rem;
  font-style: italic;
  color: var(--text-secondary);
}

#cases blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ===== FAQ ===== */
#faq details {
  margin-bottom: 12px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

#faq details[open] {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
  background: var(--bg-surface);
}

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition), background var(--transition);
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  background: var(--brand-gradient);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

#faq summary:hover {
  color: var(--brand-primary);
  background: var(--brand-gradient-soft);
}

#faq details p {
  padding: 0 20px 18px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  animation: faqFade 0.35s ease;
}

@keyframes faqFade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Contact ===== */
#contact address {
  padding: 22px 24px;
  margin: 16px 0;
  font-style: normal;
  background: var(--brand-gradient-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

#contact address p {
  margin-bottom: 8px;
  font-size: 0.94rem;
}

#contact address p:last-child {
  margin-bottom: 0;
}

#contact address a {
  font-weight: 700;
}

#contact h3 + p {
  font-size: 0.92rem;
}

/* ===== Sitemap & Links ===== */
#sitemap ul,
#links ul {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 12px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-3px);
  color: #fff;
  background: var(--brand-gradient);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
footer {
  margin-top: 60px;
  padding: 48px 20px 28px;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-surface-2) 100%);
  border-top: 1px solid var(--border-color);
}

footer > section {
  max-width: 1240px;
  margin: 0 auto 28px;
}

footer h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

footer h3 {
  font-size: 0.94rem;
  margin-top: 12px;
  margin-bottom: 4px;
  color: var(--brand-primary);
}

footer p {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 900px;
}

footer > p {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* ===== Back to top ===== */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 900;
  padding: 12px 18px;
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: var(--brand-gradient);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), box-shadow var(--transition);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  #site-search {
    width: 130px;
  }
  #site-search:focus {
    width: 170px;
  }
}

@media (max-width: 860px) {
  .header-inner {
    gap: 10px;
    padding: 10px 16px;
  }

  #menu-toggle {
    display: inline-block;
    margin-left: auto;
  }

  #site-header nav {
    order: 5;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
  }

  #site-header nav.open {
    max-height: 520px;
    opacity: 1;
    padding-top: 8px;
  }

  #site-header nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  #site-header nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
  }

  #site-header nav a::after {
    display: none;
  }

  #site-header form[role="search"] {
    order: 6;
    flex-basis: 100%;
    margin-top: 4px;
  }

  #site-search,
  #site-search:focus {
    width: 100%;
    flex: 1;
  }

  #theme-toggle {
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  main {
    padding: 0 14px 44px;
  }

  main > section {
    margin-top: 32px;
    padding: 26px 18px;
    border-radius: var(--radius-md);
  }

  #hero {
    margin-top: 16px;
    padding: 30px 20px;
    border-radius: var(--radius-lg);
  }

  #hero > p a {
    display: block;
    width: 100%;
    text-align: center;
    margin: 8px 0;
  }

  #banner {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #hero dl {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  #hero dl > div {
    padding: 14px 10px;
  }

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

  #cases blockquote {
    padding: 20px 18px 20px 46px;
  }

  #cases blockquote::before {
    left: 12px;
    font-size: 2.6rem;
  }

  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 10px 15px;
    font-size: 0.78rem;
  }
}

@media (max-width: 400px) {
  #hero dl {
    grid-template-columns: 1fr;
  }

  .logo {
    font-size: 1.3rem;
  }
}

/* ===== Motion safety ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

/* ===== Print ===== */
@media print {
  #site-header,
  #back-to-top,
  #banner,
  footer {
    display: none;
  }

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

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