:root {
  --brand-primary: #6a4cff;
  --brand-primary-dark: #5438d6;
  --brand-primary-light: #8a72ff;
  --brand-accent: #ffd166;
  --brand-accent-dark: #e6b84d;
  --brand-secondary: #ff6b9d;
  --bg-body: #f6f5fb;
  --bg-card: #ffffff;
  --bg-card-hover: #fdfcff;
  --bg-header: rgba(255, 255, 255, 0.72);
  --bg-footer: #1c1830;
  --bg-gradient-start: #6a4cff;
  --bg-gradient-mid: #8a72ff;
  --bg-gradient-end: #ff6b9d;
  --text-primary: #1c1830;
  --text-secondary: #4a4560;
  --text-muted: #7a7590;
  --text-inverse: #ffffff;
  --border-color: rgba(106, 76, 255, 0.12);
  --border-color-strong: rgba(106, 76, 255, 0.24);
  --shadow-sm: 0 2px 8px rgba(28, 24, 48, 0.06);
  --shadow-md: 0 8px 24px rgba(28, 24, 48, 0.08);
  --shadow-lg: 0 16px 48px rgba(28, 24, 48, 0.12);
  --shadow-glow: 0 8px 32px rgba(106, 76, 255, 0.28);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-blur: 18px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, 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(0.22, 1, 0.36, 1);
  --header-height: 72px;
  --max-width: 1200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0f0d1a;
    --bg-card: #1a1730;
    --bg-card-hover: #221e3a;
    --bg-header: rgba(15, 13, 26, 0.72);
    --bg-footer: #0a0814;
    --text-primary: #f2f0fa;
    --text-secondary: #c4bfd8;
    --text-muted: #8a84a3;
    --border-color: rgba(138, 114, 255, 0.16);
    --border-color-strong: rgba(138, 114, 255, 0.32);
    --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 8px 32px rgba(106, 76, 255, 0.4);
    --glass-bg: rgba(26, 23, 48, 0.55);
    --glass-border: rgba(138, 114, 255, 0.2);
  }
}

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

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

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 12% 8%, rgba(106, 76, 255, 0.08) 0%, transparent 42%),
    radial-gradient(circle at 88% 20%, rgba(255, 107, 157, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 50% 95%, rgba(138, 114, 255, 0.06) 0%, transparent 45%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

ul,
ol {
  list-style: none;
}

/* ===== Header ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: var(--bg-header);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#site-header:hover {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text-primary);
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
  box-shadow: 0 10px 36px rgba(106, 76, 255, 0.45);
}

.logo span {
  background: linear-gradient(120deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

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

#site-header nav a {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), background var(--transition-fast);
}

#site-header nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#site-header nav a:hover {
  color: var(--brand-primary);
  background: rgba(106, 76, 255, 0.08);
}

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

/* ===== Main Layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* ===== Hero ===== */
#hero {
  position: relative;
  margin: 32px 0 28px;
  padding: 64px 48px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 48%, var(--bg-gradient-end) 100%);
  background-size: 200% 200%;
  color: var(--text-inverse);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  animation: heroGradientShift 12s ease infinite;
}

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

#hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22) 0%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
  animation: heroFloat 9s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -50%;
  left: -8%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 209, 102, 0.22) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: heroFloat 11s ease-in-out infinite reverse;
}

@keyframes heroFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-18px, 22px) scale(1.08); }
}

#hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.75rem, 4.2vw, 2.85rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.12);
}

#hero p {
  position: relative;
  z-index: 1;
  max-width: 760px;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 14px;
}

.hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-base);
  will-change: transform;
}

.btn-primary {
  background: #ffffff;
  color: var(--brand-primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.16);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.24);
  color: var(--brand-primary-dark);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  color: #ffffff;
}

/* ===== Breadcrumb ===== */
main > nav[aria-label="面包屑导航"] {
  margin: 0 0 28px;
}

main > 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);
  padding: 10px 18px;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  width: fit-content;
  max-width: 100%;
  box-shadow: var(--shadow-sm);
}

main > nav[aria-label="面包屑导航"] li {
  display: flex;
  align-items: center;
}

main > nav[aria-label="面包屑导航"] li:not(:last-child)::after {
  content: "›";
  margin-left: 6px;
  color: var(--text-muted);
  opacity: 0.6;
}

main > nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
  font-weight: 500;
}

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

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

/* ===== Sections ===== */
main > section {
  margin-bottom: 32px;
  padding: 40px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), border-color var(--transition-base);
  scroll-margin-top: calc(var(--header-height) + 20px);
}

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

main > section > h2 {
  position: relative;
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 28px;
  padding-left: 18px;
  line-height: 1.35;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 72%;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  box-shadow: 0 0 12px rgba(106, 76, 255, 0.4);
}

main > section > h3 {
  font-size: clamp(1.02rem, 1.8vw, 1.15rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 26px 0 12px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

main > section > h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(106, 76, 255, 0.5);
}

main > section > h3:first-of-type {
  margin-top: 0;
}

main > section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.96rem;
  line-height: 1.85;
}

main > section ul,
main > section ol {
  margin: 14px 0 18px;
  padding-left: 4px;
}

main > section ul li,
main > section ol li {
  position: relative;
  padding: 9px 0 9px 30px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  border-bottom: 1px dashed var(--border-color);
  transition: color var(--transition-fast), padding-left var(--transition-fast), background var(--transition-fast);
}

main > section ul li:last-child,
main > section ol li:last-child {
  border-bottom: none;
}

main > section ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > section ul li:hover,
main > section ol li:hover {
  color: var(--text-primary);
  padding-left: 34px;
  background: linear-gradient(90deg, rgba(106, 76, 255, 0.05), transparent);
  border-radius: var(--radius-sm);
}

main > section ul li:hover::before {
  transform: translateY(-50%) scale(1.4);
  box-shadow: 0 0 10px rgba(106, 76, 255, 0.6);
}

main > section ol {
  counter-reset: step-counter;
}

main > section ol li {
  counter-increment: step-counter;
  padding-left: 42px;
}

main > section ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 50%;
  box-shadow: 0 3px 10px rgba(106, 76, 255, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > section ol li:hover::before {
  transform: translateY(-50%) scale(1.15);
  box-shadow: 0 4px 16px rgba(106, 76, 255, 0.55);
}

/* ===== Articles & News Cards ===== */
#news article,
#articles article {
  position: relative;
  padding: 24px 26px;
  margin-bottom: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-color-strong);
}

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

#news article h3,
#articles article h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 10px;
  line-height: 1.5;
  transition: color var(--transition-fast);
}

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

#news article p,
#articles article p {
  margin-bottom: 8px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

#news article p:first-of-type,
#articles article p:first-of-type {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: rgba(106, 76, 255, 0.1);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}

#news article a,
#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-primary);
  margin-top: 6px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

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

#news article a:hover,
#articles article a:hover {
  gap: 10px;
  color: var(--brand-secondary);
}

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

/* ===== Blockquote ===== */
blockquote {
  position: relative;
  margin: 18px 0;
  padding: 22px 26px 22px 30px;
  background: linear-gradient(135deg, rgba(106, 76, 255, 0.06), rgba(255, 107, 157, 0.05));
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--brand-secondary);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  top: 2px;
  left: 10px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--brand-primary);
  opacity: 0.18;
  pointer-events: none;
}

blockquote p {
  position: relative;
  margin: 0;
  font-size: 0.96rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* ===== FAQ (Details/Summary) ===== */
#faq details {
  margin-bottom: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

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

#faq details[open] {
  border-color: var(--border-color-strong);
  box-shadow: var(--shadow-md);
}

#faq summary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 52px 18px 24px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1;
  color: var(--brand-primary);
  background: rgba(106, 76, 255, 0.1);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

#faq summary:hover {
  color: var(--brand-primary);
  background: rgba(106, 76, 255, 0.04);
}

#faq summary:hover::after {
  background: rgba(106, 76, 255, 0.2);
}

#faq details[open] summary {
  color: var(--brand-primary);
  border-bottom: 1px solid var(--border-color);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  color: #ffffff;
}

#faq details p {
  padding: 18px 24px;
  margin: 0;
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.85;
  background: linear-gradient(180deg, rgba(106, 76, 255, 0.03), transparent);
  animation: faqReveal 0.4s ease;
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Contact ===== */
#contact p {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 0;
  transition: padding-left var(--transition-fast), background var(--transition-fast);
}

#contact p:last-of-type {
  border-bottom: none;
}

#contact p:hover {
  padding-left: 10px;
  background: linear-gradient(90deg, rgba(106, 76, 255, 0.05), transparent);
  border-radius: var(--radius-sm);
}

/* ===== Sitemap & Links ===== */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
  padding: 0;
}

#sitemap li,
#links li {
  padding: 0;
  border: none;
}

#sitemap li::before,
#links li::before {
  display: none;
}

#sitemap a,
#links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), color var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-3px);
  color: #ffffff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* ===== Footer ===== */
footer {
  position: relative;
  margin-top: 48px;
  padding: 56px 24px 40px;
  background: var(--bg-footer);
  color: rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary), var(--brand-accent));
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

footer > section:last-of-type {
  border-bottom: none;
}

footer h2 {
  font-size: 1.02rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

footer h2::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary-light), var(--brand-accent));
  box-shadow: 0 0 8px rgba(138, 114, 255, 0.7);
}

footer p {
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.68);
  margin-bottom: 8px;
}

footer a {
  color: var(--brand-primary-light);
  font-weight: 500;
}

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

footer > p {
  max-width: var(--max-width);
  margin: 32px auto 0;
  text-align: center;
}

footer > p a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

footer > p a::before {
  content: "↑";
  font-size: 1rem;
}

footer > p a:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 14px 40px rgba(106, 76, 255, 0.5);
  color: #ffffff;
}

/* ===== Scroll Animations ===== */
@media (prefers-reduced-motion: no-preference) {
  main > section,
  #hero {
    animation: fadeInUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  }

  main > section:nth-of-type(1) { animation-delay: 0.05s; }
  main > section:nth-of-type(2) { animation-delay: 0.1s; }
  main > section:nth-of-type(3) { animation-delay: 0.15s; }
  main > section:nth-of-type(4) { animation-delay: 0.2s; }
  main > section:nth-of-type(5) { animation-delay: 0.25s; }
  main > section:nth-of-type(6) { animation-delay: 0.3s; }
}

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

/* ===== Selection ===== */
::selection {
  background: rgba(106, 76, 255, 0.28);
  color: var(--text-primary);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-primary-dark), var(--brand-primary));
}

/* ===== Focus Visible ===== */
a:focus-visible,
summary:focus-visible,
button:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  #site-header nav ul {
    gap: 2px;
  }

  #site-header nav a {
    padding: 7px 10px;
    font-size: 0.85rem;
  }

  main {
    padding: 0 20px 56px;
  }

  #hero {
    padding: 52px 36px;
  }

  main > section {
    padding: 34px 28px;
  }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 768px) {
  :root {
    --header-height: auto;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    height: auto;
    padding: 14px 18px;
  }

  .logo {
    font-size: 1.15rem;
  }

  .logo svg {
    width: 34px;
    height: 34px;
  }

  #site-header nav {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

  #site-header nav::-webkit-scrollbar {
    display: none;
  }

  #site-header nav ul {
    flex-wrap: nowrap;
    gap: 4px;
    width: max-content;
  }

  #site-header nav a {
    white-space: nowrap;
    padding: 7px 13px;
    font-size: 0.82rem;
  }

  main {
    padding: 0 16px 48px;
  }

  #hero {
    margin: 20px 0;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
  }

  #hero h1 {
    font-size: 1.55rem;
    margin-bottom: 16px;
  }

  #hero p {
    font-size: 0.92rem;
    line-height: 1.8;
  }

  .hero-actions {
    gap: 12px;
    margin-top: 22px;
  }

  .btn-primary,
  .btn-secondary {
    flex: 1 1 auto;
    padding: 12px 24px;
    font-size: 0.9rem;
    min-width: 130px;
  }

  main > nav[aria-label="面包屑导航"] ol {
    font-size: 0.78rem;
    padding: 8px 14px;
  }

  main > section {
    padding: 26px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 22px;
  }

  main > section > h2 {
    font-size: 1.22rem;
    margin-bottom: 22px;
    padding-left: 15px;
  }

  main > section > h3 {
    font-size: 1rem;
    margin: 22px 0 10px;
  }

  main > section p {
    font-size: 0.92rem;
    line-height: 1.8;
  }

  main > section ul li,
  main > section ol li {
    font-size: 0.9rem;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  #news article,
  #articles article {
    padding: 20px 20px;
    border-radius: var(--radius-sm);
  }

  #news article h3,
  #articles article h3 {
    font-size: 1rem;
  }

  #faq summary {
    padding: 15px 46px 15px 18px;
    font-size: 0.92rem;
  }

  #faq summary::after {
    right: 16px;
    width: 25px;
    height: 25px;
    font-size: 1.1rem;
  }

  #faq details p {
    padding: 15px 18px;
    font-size: 0.89rem;
  }

  blockquote {
    padding: 18px 20px 18px 24px;
  }

  blockquote p {
    font-size: 0.9rem;
  }

  #sitemap ul,
  #links ul {
    gap: 9px;
  }

  #sitemap a,
  #links a {
    padding: 9px 18px;
    font-size: 0.85rem;
  }

  footer {
    padding: 40px 18px 32px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  footer h2 {
    font-size: 0.96rem;
  }

  footer p {
    font-size: 0.86rem;
  }

  footer > p a {
    padding: 11px 26px;
    font-size: 0.86rem;
  }
}

@media (max-width: 380px) {
  #hero {
    padding: 32px 18px;
  }

  #hero h1 {
    font-size: 1.35rem;
  }

  main > section {
    padding: 22px 16px;
  }

  .btn-primary,
  .btn-secondary {
    min-width: 100%;
  }
}

/* ===== 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;
  }

  #hero {
    animation: none;
  }
}

/* ===== Print ===== */
@media print {
  #site-header,
  footer,
  .hero-actions {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

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

  #hero {
    background: #f0f0f0;
    color: #000000;
    box-shadow: none;
  }
}