:root {
  --brand: #c8102e;
  --brand-dark: #a00d24;
  --brand-light: #e8435c;
  --brand-soft: rgba(200, 16, 46, 0.08);
  --accent: #f5b301;
  --accent-soft: rgba(245, 179, 1, 0.12);
  --bg: #fdf8f9;
  --bg-alt: #ffffff;
  --bg-soft: #f7eef0;
  --text: #241a1d;
  --text-secondary: #5c4a4f;
  --text-muted: #8d7a80;
  --border: rgba(200, 16, 46, 0.12);
  --border-strong: rgba(200, 16, 46, 0.22);
  --glass-bg: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.55);
  --shadow-sm: 0 2px 8px rgba(36, 26, 29, 0.06);
  --shadow-md: 0 8px 24px rgba(36, 26, 29, 0.08);
  --shadow-lg: 0 16px 48px rgba(36, 26, 29, 0.12);
  --shadow-brand: 0 10px 30px rgba(200, 16, 46, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --transition: 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14101a;
    --bg-alt: #1c1622;
    --bg-soft: #221a2a;
    --text: #f2ecf0;
    --text-secondary: #c4b6c0;
    --text-muted: #94848f;
    --border: rgba(232, 67, 92, 0.18);
    --border-strong: rgba(232, 67, 92, 0.32);
    --glass-bg: rgba(34, 26, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --brand-soft: rgba(232, 67, 92, 0.12);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
    --shadow-brand: 0 10px 30px rgba(200, 16, 46, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, var(--brand-soft), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, var(--accent-soft), transparent 55%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  background: linear-gradient(120deg, var(--brand) 0%, var(--brand-light) 55%, var(--accent) 115%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.9rem);
  position: relative;
  padding-left: 18px;
  margin-bottom: 1.1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand), var(--accent));
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
}

strong {
  color: var(--text);
  font-weight: 600;
}

/* ============ Header ============ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), background var(--transition);
}

header > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 22px;
}

header > div > a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  flex-shrink: 0;
}

header > div > a svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow-brand);
  transition: transform var(--transition);
}

header > div > a:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

header > div > a span {
  background: linear-gradient(120deg, var(--brand), var(--brand-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav[aria-label="主导航"] {
  flex: 1 1 auto;
  min-width: 0;
}

nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] a:hover {
  color: var(--brand);
  background: var(--brand-soft);
  transform: translateY(-2px);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

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

header form[role="search"] input[type="search"] {
  width: 210px;
  max-width: 100%;
  padding: 9px 16px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition), box-shadow var(--transition), width var(--transition);
}

header form[role="search"] input[type="search"]::placeholder {
  color: var(--text-muted);
}

header form[role="search"] input[type="search"]:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}

header form[role="search"] button {
  padding: 9px 20px;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--shadow-brand);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

header form[role="search"] button:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 14px 32px rgba(200, 16, 46, 0.32);
}

header form[role="search"] button:active {
  transform: translateY(0);
}

/* ============ Main layout ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 60px;
}

main > section {
  margin-bottom: 28px;
  padding: clamp(22px, 3.4vw, 40px);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

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

main > section:nth-child(2) { animation-delay: 0.05s; }
main > section:nth-child(3) { animation-delay: 0.1s; }
main > section:nth-child(4) { animation-delay: 0.15s; }
main > section:nth-child(5) { animation-delay: 0.2s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ============ Breadcrumb ============ */
nav[aria-label="面包屑导航"] {
  margin-bottom: 20px;
  animation: fadeIn 0.6s ease both;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  color: var(--text-muted);
  opacity: 0.6;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition);
}

nav[aria-label="面包屑导航"] a:hover {
  color: var(--brand);
  background: var(--brand-soft);
}

nav[aria-label="面包屑导航"] li[aria-current="page"] {
  color: var(--brand);
  font-weight: 600;
}

/* ============ Banner ============ */
#banner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #c8102e 0%, #e8435c 42%, #f5b301 100%);
  border: none;
  color: #fff;
  box-shadow: var(--shadow-brand);
  isolation: isolate;
}

#banner::before,
#banner::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

#banner::before {
  width: 420px;
  height: 420px;
  top: -180px;
  right: -120px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.32), transparent 70%);
  animation: floatSoft 9s ease-in-out infinite;
}

#banner::after {
  width: 320px;
  height: 320px;
  bottom: -160px;
  left: -100px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 70%);
  animation: floatSoft 11s ease-in-out infinite reverse;
}

#banner h1 {
  background: none;
  -webkit-text-fill-color: #fff;
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
  margin-bottom: 0.8rem;
}

#banner > p {
  color: rgba(255, 255, 255, 0.94);
  max-width: 780px;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  margin-bottom: 1.4rem;
}

#banner figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.32);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
  transition: transform var(--transition), box-shadow var(--transition);
}

#banner figure:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.24);
}

#banner figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#banner figcaption {
  padding: 10px 16px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.88);
  text-align: center;
  background: rgba(0, 0, 0, 0.12);
}

/* ============ Intro / text sections ============ */
#intro h3,
#products h3,
#solutions h3,
#cases h3,
#knowledge h3 {
  margin-top: 1.4rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed var(--border-strong);
  color: var(--brand);
}

#intro h3:first-of-type,
#products h3:first-of-type,
#solutions h3:first-of-type,
#cases h3:first-of-type,
#knowledge h3:first-of-type {
  margin-top: 1rem;
}

#intro p,
#products p,
#solutions p,
#cases p,
#knowledge p {
  text-align: justify;
}

/* ============ Cases ============ */
#cases h3 {
  position: relative;
  padding-left: 14px;
}

#cases h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  bottom: 0.35em;
  width: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand), var(--accent));
}

/* ============ News ============ */
#news article {
  position: relative;
  padding: 18px 20px 18px 24px;
  margin-bottom: 14px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#news article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand), var(--brand-light));
  opacity: 0.85;
  transition: opacity var(--transition);
}

#news article:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

#news article:last-child {
  margin-bottom: 0;
}

#news article h3 {
  margin-bottom: 0.3rem;
  font-size: 1.08rem;
}

#news article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 2px 10px;
  margin-bottom: 0.5rem;
  background: var(--brand-soft);
  border-radius: var(--radius-pill);
  font-variant-numeric: tabular-nums;
}

#news article p {
  margin-bottom: 0;
  font-size: 0.94rem;
}

/* ============ Articles grid ============ */
#articles {
  background: transparent;
  border: none;
  box-shadow: none;
  padding-left: 0;
  padding-right: 0;
}

#articles:hover {
  box-shadow: none;
}

#articles > p {
  margin-bottom: 1.4rem;
}

#articles {
  display: block;
}

#articles article {
  display: flex;
  flex-direction: column;
  padding: 20px 22px;
  margin-bottom: 16px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

#articles article h3 {
  margin-bottom: 0.4rem;
  transition: color var(--transition);
}

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

#articles article time {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
}

#articles article p {
  flex: 1;
  font-size: 0.94rem;
  margin-bottom: 0.9rem;
}

#articles article a {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

#articles article a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  box-shadow: var(--shadow-brand);
  transform: translateY(-2px);
}

#articles article a:hover::after {
  transform: translateX(4px);
}

/* ============ HowTo ============ */
#howto ol {
  counter-reset: step;
  display: grid;
  gap: 12px;
  margin: 0.8rem 0 1.2rem;
}

#howto ol li {
  position: relative;
  counter-increment: step;
  padding: 14px 18px 14px 58px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(200, 16, 46, 0.28);
}

#howto ol li:hover {
  transform: translateX(4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

#howto strong {
  color: var(--brand);
}

#howto h3 {
  margin-top: 1.3rem;
  color: var(--text);
  font-size: 1.08rem;
}

#howto h3:first-of-type {
  margin-top: 0.6rem;
}

/* ============ FAQ ============ */
#faq details {
  margin-bottom: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  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(--border-strong);
  box-shadow: var(--shadow-sm);
  background: var(--bg-alt);
}

#faq details:hover {
  border-color: var(--border-strong);
}

#faq summary {
  position: relative;
  padding: 15px 48px 15px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition), background var(--transition);
  -webkit-tap-highlight-color: transparent;
}

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

#faq summary::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition);
}

#faq details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

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

#faq details p {
  padding: 0 20px 16px;
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
  animation: fadeIn 0.35s ease both;
}

/* ============ Knowledge ============ */
#knowledge {
  background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg-soft) 100%);
}

/* ============ Contact ============ */
#contact address {
  font-style: normal;
  display: grid;
  gap: 10px;
  padding: 20px 22px;
  margin: 1rem 0 1.4rem;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

#contact address p {
  position: relative;
  padding-left: 26px;
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color var(--transition), transform var(--transition);
}

#contact address p::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 0 0 3px var(--brand-soft);
}

#contact address p:hover {
  color: var(--brand);
  transform: translateX(3px);
}

/* ============ Sitemap ============ */
#sitemap ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

#sitemap a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-color: transparent;
  box-shadow: var(--shadow-brand);
  transform: translateY(-2px);
}

/* ============ Footer ============ */
footer {
  margin-top: 20px;
  padding: 48px 20px 32px;
  background: linear-gradient(180deg, transparent 0%, var(--brand-soft) 100%);
  border-top: 1px solid var(--border);
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 28px;
}

footer > section h2 {
  font-size: 1.05rem;
  padding-left: 0;
  margin-bottom: 0.9rem;
  color: var(--text);
}

footer > section h2::before {
  display: none;
}

footer section[aria-labelledby="footer-links-title"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

footer section[aria-labelledby="footer-links-title"] a {
  display: inline-block;
  padding: 7px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

footer section[aria-labelledby="footer-links-title"] a:hover {
  color: var(--brand);
  border-color: var(--brand);
  background: var(--brand-soft);
  transform: translateY(-2px);
}

footer section[aria-labelledby="footer-legal-title"] {
  padding: 22px 24px;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

footer section[aria-labelledby="footer-legal-title"] p {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  line-height: 1.7;
}

footer section[aria-labelledby="footer-legal-title"] p:last-child {
  margin-bottom: 0;
}

footer section[aria-labelledby="footer-legal-title"] strong {
  color: var(--brand);
  font-size: 0.88rem;
}

footer > p {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============ Responsive ============ */
@media (min-width: 768px) {
  #articles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  #articles > h2,
  #articles > p {
    grid-column: 1 / -1;
  }

  #articles article {
    margin-bottom: 0;
  }
}

@media (min-width: 1024px) {
  #articles {
    grid-template-columns: repeat(3, 1fr);
  }

  main {
    padding-top: 32px;
  }

  #banner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 32px;
  }

  #banner h1,
  #banner > p {
    grid-column: 1;
  }

  #banner figure {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin: 0;
  }
}

@media (max-width: 900px) {
  header > div {
    padding: 12px 16px;
    gap: 10px 14px;
  }

  header > div > a {
    font-size: 1.05rem;
  }

  nav[aria-label="主导航"] {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 -16px;
    padding: 0 16px;
  }

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

  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  header form[role="search"] {
    margin-left: auto;
  }

  header form[role="search"] input[type="search"] {
    width: 150px;
  }

  header form[role="search"] button {
    padding: 9px 14px;
  }
}

@media (max-width: 640px) {
  :root {
    --radius-lg: 18px;
    --radius-md: 13px;
  }

  body {
    font-size: 15px;
  }

  main {
    padding: 16px 14px 44px;
  }

  main > section {
    padding: 20px 16px;
    margin-bottom: 18px;
  }

  header form[role="search"] input[type="search"] {
    width: 100%;
    min-width: 0;
  }

  header form[role="search"] {
    flex: 1 1 100%;
    order: 2;
  }

  header > div > a {
    order: 1;
  }

  nav[aria-label="主导航"] {
    order: 3;
  }

  #banner {
    padding: 24px 18px;
  }

  #banner h1 {
    font-size: 1.5rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 52px;
    font-size: 0.9rem;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }

  #faq summary {
    padding: 13px 42px 13px 16px;
    font-size: 0.92rem;
  }

  #faq details p {
    padding: 0 16px 14px;
    font-size: 0.9rem;
  }

  #contact address {
    padding: 16px;
  }

  footer {
    padding: 32px 14px 24px;
  }

  footer section[aria-labelledby="footer-legal-title"] {
    padding: 18px 16px;
  }

  #sitemap a {
    padding: 7px 14px;
    font-size: 0.84rem;
  }
}

@media (max-width: 380px) {
  header > div > a span {
    display: none;
  }

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

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

@media (prefers-contrast: more) {
  :root {
    --border: rgba(200, 16, 46, 0.45);
    --text-secondary: #3a2c30;
  }

  a {
    text-decoration: underline;
  }
}

/* ============ Print ============ */
@media print {
  header,
  footer > section[aria-labelledby="footer-links-title"],
  #sitemap,
  header form[role="search"] {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    animation: none;
  }

  #banner {
    background: #c8102e !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  #faq details {
    border: 1px solid #ccc;
  }

  #faq details > p {
    display: block !important;
  }
}