:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(26, 26, 46, 0.72);
  --bg-card-hover: rgba(34, 34, 58, 0.88);
  --bg-glass: rgba(22, 33, 62, 0.55);
  --bg-glass-border: rgba(233, 69, 96, 0.18);
  --text-primary: #f5f5f7;
  --text-secondary: #b8b8d0;
  --text-muted: #7a7a9a;
  --accent: #e94560;
  --accent-hover: #ff5c78;
  --accent-soft: rgba(233, 69, 96, 0.12);
  --accent-secondary: #533483;
  --accent-tertiary: #0f3460;
  --gradient-banner: linear-gradient(135deg, #1a1a2e 0%, #16213e 35%, #0f3460 65%, #533483 100%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #533483 100%);
  --gradient-card: linear-gradient(145deg, rgba(26, 26, 46, 0.85), rgba(15, 15, 26, 0.95));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(233, 69, 96, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f4f4f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef0f6;
    --bg-card: rgba(255, 255, 255, 0.78);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.55);
    --bg-glass-border: rgba(233, 69, 96, 0.22);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8a8aa0;
    --accent: #d6304e;
    --accent-hover: #e94560;
    --accent-soft: rgba(214, 48, 78, 0.1);
    --gradient-banner: linear-gradient(135deg, #e8ecf5 0%, #dfe6f5 35%, #e0d8f0 65%, #f5d8e0 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(244, 244, 248, 0.95));
    --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.08);
    --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
    --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
    --shadow-glow: 0 0 24px rgba(214, 48, 78, 0.18);
  }
}

*,
*::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%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(ellipse at 15% 0%, rgba(233, 69, 96, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 20%, rgba(83, 52, 131, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(15, 52, 96, 0.12) 0%, transparent 60%);
  background-attachment: fixed;
}

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

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1.1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  box-shadow: var(--shadow-glow);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

h4 {
  font-size: 1.05rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* ========== Header ========== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  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);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

header > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: var(--header-height);
  flex-wrap: wrap;
}

header > div > a {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  transition: transform var(--transition-base);
}

header > div > a:hover {
  transform: scale(1.04);
}

header > div > a svg {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

header > div > a svg text {
  transition: fill var(--transition-base);
}

header > div > a:hover svg text:first-of-type {
  fill: var(--accent-hover);
}

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

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: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

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

nav[aria-label="主导航"] a:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

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

/* ========== Search Form ========== */
form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

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

form[role="search"] input[type="search"] {
  width: 180px;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), width var(--transition-base);
}

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

form[role="search"] input[type="search"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  width: 220px;
  outline: none;
}

form[role="search"] button {
  padding: 0.5rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  white-space: nowrap;
}

form[role="search"] button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
  filter: brightness(1.1);
}

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

/* ========== Breadcrumb ========== */
nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

nav[aria-label="面包屑导航"] li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] li:not(:last-child)::after {
  content: "/";
  color: var(--text-muted);
  opacity: 0.5;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
}

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

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

/* ========== Main Layout ========== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

main > section {
  margin-bottom: 3.5rem;
  animation: fadeUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

main > section:nth-child(1) { animation-delay: 0.05s; }
main > section:nth-child(2) { animation-delay: 0.1s; }
main > section:nth-child(3) { animation-delay: 0.15s; }
main > section:nth-child(4) { animation-delay: 0.2s; }
main > section:nth-child(5) { animation-delay: 0.25s; }
main > section:nth-child(6) { animation-delay: 0.3s; }
main > section:nth-child(7) { animation-delay: 0.35s; }
main > section:nth-child(8) { animation-delay: 0.4s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@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;
  }
}

/* ========== Banner ========== */
#banner {
  position: relative;
  padding: 3rem 2rem;
  border-radius: var(--radius-xl);
  background: var(--gradient-banner);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite, fadeUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
  overflow: hidden;
  border: 1px solid var(--bg-glass-border);
  box-shadow: var(--shadow-lg);
}

#banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(233, 69, 96, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 20% 80%, rgba(83, 52, 131, 0.22) 0%, transparent 45%);
  pointer-events: none;
}

#banner::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.06) 50%, transparent 60%);
  transform: rotate(15deg);
  pointer-events: none;
  animation: shimmer 8s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes shimmer {
  0%, 100% { transform: translateX(-30%) rotate(15deg); opacity: 0.6; }
  50% { transform: translateX(30%) rotate(15deg); opacity: 1; }
}

#banner h1 {
  position: relative;
  z-index: 1;
  margin-bottom: 1.25rem;
  background: linear-gradient(120deg, var(--text-primary) 0%, var(--accent) 60%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 20px rgba(233, 69, 96, 0.15);
}

#banner > p {
  position: relative;
  z-index: 1;
  max-width: 820px;
  font-size: 1.02rem;
  color: var(--text-secondary);
}

#banner > div {
  position: relative;
  z-index: 1;
  margin: 2rem 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

#banner > div:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55), var(--shadow-glow);
}

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

#banner > p:last-child {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding: 0.4rem 1.1rem;
  font-size: 0.85rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-bottom: 0;
}

/* ========== Content Sections (Cards) ========== */
#core,
#about,
#products,
#solutions,
#cases,
#articles,
#faq,
#howto,
#notes,
#contact,
#sitemap {
  padding: 2.25rem 2rem;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--bg-glass-border);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

#core:hover,
#about:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#notes:hover,
#contact:hover,
#sitemap:hover {
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
}

#core p,
#about p,
#products p,
#solutions p,
#cases p,
#howto p,
#notes p,
#contact p {
  text-align: justify;
}

/* ========== Articles ========== */
#articles > article {
  position: relative;
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--gradient-card);
  border: 1px solid var(--bg-glass-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#articles > article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  opacity: 0.6;
  transition: opacity var(--transition-base), width var(--transition-base);
}

#articles > article:hover {
  transform: translateX(6px) translateY(-2px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border-color: rgba(233, 69, 96, 0.4);
}

#articles > article:hover::before {
  opacity: 1;
  width: 5px;
}

#articles > article h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
  transition: color var(--transition-fast);
}

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

#articles > article p {
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

#articles > article p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

#articles > article time {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

#articles > article > a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  border: 1px solid var(--bg-glass-border);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

#articles > article > a:hover {
  background: var(--gradient-accent);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

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

/* ========== FAQ ========== */
#faq details {
  margin-bottom: 0.85rem;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  background: var(--bg-card-hover);
  border-color: rgba(233, 69, 96, 0.45);
  box-shadow: var(--shadow-md);
}

#faq summary {
  position: relative;
  padding: 1rem 3rem 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

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

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

#faq details > p {
  padding: 0 1.25rem 1.1rem;
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
  animation: fadeIn 0.4s ease both;
}

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

/* ========== HowTo ========== */
#howto h4 {
  position: relative;
  padding-left: 1.6rem;
  color: var(--accent);
}

#howto h4::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

/* ========== Blockquote (Cases) ========== */
#cases blockquote {
  position: relative;
  margin: 1rem 0;
  padding: 1.25rem 1.5rem 1.25rem 2.5rem;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-left: 3px solid var(--accent);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0.6rem;
  top: 0.4rem;
  font-size: 2.6rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--accent);
  opacity: 0.4;
}

#cases blockquote:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

#cases blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* ========== Contact / Address ========== */
#contact address {
  font-style: normal;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  margin-bottom: 1rem;
}

#contact address p {
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

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

#contact address a {
  font-weight: 600;
  border-bottom: 1px dashed var(--accent);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

#contact address a:hover {
  border-bottom-style: solid;
}

/* ========== Sitemap ========== */
#sitemap > ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

#sitemap > ul li a {
  display: block;
  padding: 0.55rem 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

#sitemap > ul li a:hover {
  color: #fff;
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

#sitemap h3 {
  margin-top: 0.5rem;
}

#sitemap h3 + ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

#sitemap h3 + ul li a {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px dashed var(--bg-glass-border);
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

#sitemap h3 + ul li a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: none;
  box-shadow: none;
}

/* ========== Footer ========== */
footer {
  position: relative;
  margin-top: 2rem;
  padding: 3rem 1.5rem 2rem;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-top: 1px solid var(--bg-glass-border);
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.2);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0.7;
}

footer > div {
  max-width: var(--max-width);
  margin: 0 auto 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--bg-glass-border);
}

footer > div:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
  text-align: center;
}

footer h2 {
  font-size: 1.4rem;
  padding-left: 0;
  margin-bottom: 0.75rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

footer h2::before {
  display: none;
}

footer h3 {
  font-size: 0.95rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: var(--accent);
  letter-spacing: 0.03em;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.4rem;
}

footer > div:last-child p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  header > div {
    gap: 1rem;
  }

  nav[aria-label="主导航"] ul {
    gap: 0.15rem;
  }

  nav[aria-label="主导航"] a {
    padding: 0.4rem 0.65rem;
    font-size: 0.85rem;
  }

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

  form[role="search"] input[type="search"]:focus {
    width: 180px;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 64px;
  }

  header > div {
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }

  nav[aria-label="主导航"] {
    order: 3;
    flex-basis: 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;
    padding-bottom: 0.25rem;
  }

  nav[aria-label="主导航"] a {
    white-space: nowrap;
  }

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

  form[role="search"] input[type="search"] {
    width: 140px;
    font-size: 0.82rem;
  }

  form[role="search"] input[type="search"]:focus {
    width: 160px;
  }

  main {
    padding: 1.25rem 1rem 2rem;
  }

  #banner {
    padding: 2rem 1.25rem;
  }

  #core,
  #about,
  #products,
  #solutions,
  #cases,
  #articles,
  #faq,
  #howto,
  #notes,
  #contact,
  #sitemap {
    padding: 1.5rem 1.25rem;
  }

  #articles > article {
    padding: 1.25rem 1.1rem 1.25rem 1.4rem;
  }

  #articles > article:hover {
    transform: translateY(-2px);
  }

  #sitemap > ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  header > div {
    flex-wrap: wrap;
  }

  header > div > a svg {
    width: 150px;
    height: 34px;
  }

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

  form[role="search"] input[type="search"] {
    flex: 1;
    width: auto;
  }

  form[role="search"] input[type="search"]:focus {
    width: auto;
  }

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

  nav[aria-label="面包屑导航"] {
    padding: 0.75rem 1rem 0;
  }

  main {
    padding: 1rem 0.75rem 2rem;
  }

  main > section {
    margin-bottom: 2.25rem;
  }

  #banner {
    padding: 1.5rem 1rem;
    border-radius: var(--radius-lg);
  }

  #banner > p:last-child {
    font-size: 0.78rem;
  }

  #core,
  #about,
  #products,
  #solutions,
  #cases,
  #articles,
  #faq,
  #howto,
  #notes,
  #contact,
  #sitemap {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
  }

  h2 {
    padding-left: 0.9rem;
    margin-bottom: 1rem;
  }

  h2::before {
    width: 3px;
  }

  #articles > article {
    padding: 1.1rem 0.9rem 1.1rem 1.15rem;
    border-radius: var(--radius-md);
  }

  #articles > article h3 {
    font-size: 1.05rem;
  }

  #faq summary {
    padding: 0.85rem 2.75rem 0.85rem 1rem;
    font-size: 0.92rem;
  }

  #faq summary::after {
    right: 0.85rem;
    width: 22px;
    height: 22px;
    font-size: 1rem;
  }

  #faq details > p {
    padding: 0 1rem 0.9rem;
    font-size: 0.88rem;
  }

  #sitemap > ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  #sitemap > ul li a {
    padding: 0.45rem 0.75rem;
    font-size: 0.82rem;
  }

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

  #cases blockquote {
    padding: 1rem 1rem 1rem 2rem;
  }

  #cases blockquote::before {
    font-size: 2rem;
    left: 0.4rem;
  }
}

@media (max-width: 380px) {
  #sitemap > ul {
    grid-template-columns: 1fr;
  }

  nav[aria-label="主导航"] a {
    padding: 0.35rem 0.55rem;
    font-size: 0.8rem;
  }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), var(--accent-secondary));
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-hover), var(--accent-secondary));
}

/* ========== Selection ========== */
::selection {
  background: var(--accent);
  color: #fff;
}

/* ========== Print ========== */
@media print {
  header,
  footer,
  nav[aria-label="面包屑导航"],
  form[role="search"] {
    display: none;
  }

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

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