:root {
  --brand-primary: #ff6b6b;
  --brand-secondary: #ffa94d;
  --brand-accent: #845ef7;
  --brand-gradient: linear-gradient(135deg, #ff6b6b 0%, #ffa94d 50%, #845ef7 100%);
  --brand-gradient-soft: linear-gradient(135deg, rgba(255, 107, 107, 0.12) 0%, rgba(132, 94, 247, 0.12) 100%);
  --bg-body: #f5f6fa;
  --bg-surface: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --bg-glass-border: rgba(255, 255, 255, 0.65);
  --bg-code: #1a1a2e;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --text-tertiary: #7a7a95;
  --text-inverse: #ffffff;
  --border-color: rgba(26, 26, 46, 0.08);
  --border-strong: rgba(26, 26, 46, 0.14);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.12);
  --shadow-glow: 0 8px 32px rgba(255, 107, 107, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Roboto Mono", Consolas, monospace;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
  --header-height: 68px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0f0f1a;
    --bg-surface: #1a1a2e;
    --bg-elevated: rgba(26, 26, 46, 0.78);
    --bg-glass: rgba(26, 26, 46, 0.55);
    --bg-glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f0f0f5;
    --text-secondary: #b8b8cc;
    --text-tertiary: #8888a0;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --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(255, 107, 107, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -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(255, 107, 107, 0.08) 0%, transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(132, 94, 247, 0.08) 0%, transparent 42%),
    radial-gradient(circle at 50% 92%, rgba(255, 169, 77, 0.06) 0%, transparent 46%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  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-accent);
}

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

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

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== Header ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

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

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.brand:hover {
  transform: scale(1.04);
  color: var(--text-primary);
}

.brand svg {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.brand:hover svg {
  box-shadow: var(--shadow-glow);
  transform: rotate(-6deg);
}

.brand-name {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  letter-spacing: 0.5px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-list::-webkit-scrollbar {
  display: none;
}

.nav-list li {
  flex-shrink: 0;
}

.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.nav-list a:hover {
  color: var(--brand-primary);
  background: var(--brand-gradient-soft);
}

.nav-list a:hover::after {
  width: 60%;
}

.site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 4px 4px 4px 16px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.site-search:focus-within {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(255, 107, 107, 0.12);
  background: var(--bg-surface);
}

.site-search input {
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  width: 180px;
  padding: 6px 0;
  outline: none;
}

.site-search input::placeholder {
  color: var(--text-tertiary);
}

.site-search button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-inverse);
  background: var(--brand-gradient);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-base), filter var(--transition-fast);
}

.site-search button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
  filter: brightness(1.05);
}

.site-search button:active {
  transform: scale(0.97);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-tertiary);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--text-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--brand-primary);
  background: var(--brand-gradient-soft);
}

.breadcrumb [aria-current="page"] {
  color: var(--brand-primary);
  font-weight: 600;
}

/* ===== Main layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

main > section {
  margin-top: 56px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  margin-top: 28px;
  padding: 64px 44px;
  border-radius: var(--radius-xl);
  background: var(--brand-gradient);
  background-size: 200% 200%;
  color: var(--text-inverse);
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-lg);
  animation: heroGradient 14s ease infinite;
}

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

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.28) 0%, transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.18) 0%, transparent 45%);
  z-index: -1;
}

.hero::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16) 0%, transparent 70%);
  z-index: -1;
  animation: floatOrb 12s ease-in-out infinite;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(1.1); }
}

.hero h1 {
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
  animation: fadeUp 0.8s var(--transition-slow) both;
}

.hero p {
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.94);
  max-width: 900px;
  animation: fadeUp 0.9s 0.1s var(--transition-slow) both;
}

.hero strong {
  color: #fff;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.5);
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

.hero-lead {
  font-size: 1.08rem !important;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 36px;
  animation: fadeUp 1s 0.2s var(--transition-slow) both;
}

.stat {
  background: rgba(255, 255, 255, 0.16);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  text-align: center;
  transition: transform var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.stat:hover {
  transform: translateY(-6px) scale(1.02);
  background: rgba(255, 255, 255, 0.24);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.stat-number {
  display: block;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.3px;
}

/* ===== Section base ===== */
.section {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 44px 40px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
  animation: fadeUp 0.7s var(--transition-slow) both;
}

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

.section h2 {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.4px;
  margin-bottom: 22px;
  padding-bottom: 16px;
  position: relative;
  color: var(--text-primary);
}

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

.section:hover h2::after {
  width: 110px;
}

.section h3 {
  font-size: clamp(1.08rem, 2.4vw, 1.3rem);
  font-weight: 700;
  margin: 30px 0 12px;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  position: relative;
  padding-left: 16px;
}

.section h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 70%;
  border-radius: 3px;
  background: var(--brand-gradient);
}

.section h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.85;
}

.section p:last-child {
  margin-bottom: 0;
}

.section ul,
.section ol {
  margin: 12px 0 18px;
  padding-left: 4px;
  list-style: none;
}

.section ul li,
.section ol li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  color: var(--text-secondary);
  line-height: 1.8;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.section ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-gradient);
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.14);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.section ul li:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

.section ul li:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 0 5px rgba(255, 107, 107, 0.2);
}

.section ol {
  counter-reset: step-counter;
}

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

.section ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-inverse);
  background: var(--brand-gradient);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.section ol li:hover::before {
  transform: scale(1.12) rotate(-8deg);
  box-shadow: var(--shadow-glow);
}

/* ===== Grid & cards ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 24px 0 8px;
}

.card {
  position: relative;
  background: var(--bg-elevated);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card::after {
  content: "";
  position: absolute;
  top: -60%;
  right: -30%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

.card h4 {
  position: relative;
  z-index: 1;
}

.card p {
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ===== News list ===== */
.news-list {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.news-list li {
  position: relative;
  padding: 22px 24px 22px 24px !important;
  margin-bottom: 0 !important;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  list-style: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.news-list li::before {
  display: none;
}

.news-list li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.news-list time {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: var(--brand-gradient-soft);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}

.news-list strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.5;
  color: var(--text-primary);
}

.news-list p {
  font-size: 0.94rem;
  margin-bottom: 0;
}

/* ===== Article cards ===== */
.article-card {
  position: relative;
  background: var(--bg-elevated);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  margin-top: 18px;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.article-card::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-base);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.article-card:hover::before {
  transform: scaleY(1);
}

.article-card h3 {
  margin-top: 0;
  font-size: 1.15rem;
  padding-left: 0;
  transition: color var(--transition-fast);
}

.article-card h3::before {
  display: none;
}

.article-card:hover h3 {
  color: var(--brand-primary);
}

.article-meta {
  font-size: 0.82rem !important;
  color: var(--text-tertiary) !important;
  margin-bottom: 12px !important;
  letter-spacing: 0.2px;
}

.article-card p {
  font-size: 0.95rem;
}

.article-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-primary);
  padding: 6px 0;
  position: relative;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.article-card a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.article-card a:hover {
  gap: 10px;
  color: var(--brand-accent);
}

.article-card a:hover::after {
  transform: translateX(3px);
}

/* ===== Blockquote ===== */
blockquote {
  position: relative;
  margin: 18px 0;
  padding: 22px 26px 22px 60px;
  background: var(--brand-gradient-soft);
  border-left: 4px solid var(--brand-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 8px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--brand-primary);
  opacity: 0.4;
}

blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 0.97rem;
}

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

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

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

#faq summary {
  cursor: pointer;
  padding: 18px 52px 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  list-style: none;
  position: relative;
  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: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  color: var(--brand-primary);
  background: var(--brand-gradient-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(--brand-gradient);
  color: #fff;
}

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

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.95rem;
  animation: fadeUp 0.4s ease both;
}

/* ===== Contact list ===== */
.contact-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 20px 0;
  list-style: none;
  padding: 0;
}

.contact-list li {
  padding: 18px 20px !important;
  margin-bottom: 0 !important;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.contact-list li::before {
  display: none;
}

.contact-list li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.contact-list strong {
  color: var(--text-primary);
  margin-right: 6px;
}

.contact-list a {
  word-break: break-all;
  font-weight: 600;
}

/* ===== Sitemap & friend links ===== */
.sitemap-list,
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.sitemap-list li,
.friend-links li {
  padding: 0 !important;
  margin-bottom: 0 !important;
}

.sitemap-list li::before,
.friend-links li::before {
  display: none;
}

.sitemap-list a,
.friend-links a {
  display: inline-block;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-base), color var(--transition-fast), background var(--transition-base), border-color var(--transition-base);
}

.sitemap-list a:hover,
.friend-links a:hover {
  color: var(--text-inverse);
  background: var(--brand-gradient);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* ===== Legal ===== */
#legal h2 {
  font-size: 1.2rem;
  margin-top: 28px;
}

#legal h2:first-child {
  margin-top: 0;
}

/* ===== Footer ===== */
#site-footer {
  background: var(--bg-code);
  color: rgba(255, 255, 255, 0.72);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--brand-gradient);
}

#site-footer::after {
  content: "";
  position: absolute;
  bottom: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 44px 24px 36px;
  position: relative;
  z-index: 1;
  text-align: center;
}

.footer-inner p {
  font-size: 0.88rem;
  line-height: 1.9;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.72);
}

.footer-inner p:first-child {
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.95rem;
}

.footer-inner p:last-child {
  margin-bottom: 0;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ===== Back to top ===== */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-inverse);
  background: var(--brand-gradient);
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.15;
  padding: 0;
}

#back-to-top::before {
  content: "↑";
  position: absolute;
  top: 8px;
  font-size: 0.85rem;
}

#back-to-top.is-visible,
#back-to-top:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-6px) scale(1.08);
  box-shadow: 0 12px 40px rgba(255, 107, 107, 0.45);
}

#back-to-top:active {
  transform: translateY(-2px) scale(0.96);
}

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Scroll reveal via IntersectionObserver */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }

  .site-search input {
    width: 140px;
  }

  .hero {
    padding: 52px 32px;
  }

  .section {
    padding: 36px 30px;
  }
}

@media (max-width: 860px) {
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 20px;
    gap: 12px;
  }

  nav[aria-label="主导航"] {
    order: 3;
    flex-basis: 100%;
    width: 100%;
  }

  .nav-list {
    padding-bottom: 4px;
  }

  .site-search {
    margin-left: auto;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 44px 26px;
  }

  .section {
    padding: 30px 22px;
    border-radius: var(--radius-lg);
  }

  main > section {
    margin-top: 40px;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
  }
}

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

  .header-inner {
    padding: 10px 16px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand svg {
    width: 32px;
    height: 32px;
  }

  .site-search {
    flex: 1;
    min-width: 0;
    padding-left: 12px;
  }

  .site-search input {
    width: 100%;
    min-width: 0;
  }

  .site-search button {
    padding: 7px 14px;
    font-size: 0.82rem;
  }

  .breadcrumb {
    padding: 14px 16px 0;
    font-size: 0.8rem;
  }

  main {
    padding: 0 16px 60px;
  }

  .hero {
    margin-top: 20px;
    padding: 34px 20px;
    border-radius: var(--radius-lg);
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-lead {
    font-size: 1rem !important;
  }

  .hero-stats {
    gap: 12px;
    margin-top: 26px;
  }

  .stat {
    padding: 14px 10px;
    border-radius: var(--radius-md);
  }

  .stat-label {
    font-size: 0.74rem;
  }

  .section {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }

  main > section {
    margin-top: 32px;
  }

  .section h2 {
    font-size: 1.2rem;
    margin-bottom: 18px;
    padding-bottom: 12px;
  }

  .section h3 {
    font-size: 1.05rem;
    margin: 24px 0 10px;
    padding-left: 13px;
  }

  .section h3::before {
    width: 4px;
  }

  .section p,
  .section ul li,
  .section ol li {
    font-size: 0.93rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .card {
    padding: 20px 18px;
  }

  .news-list li {
    padding: 18px 18px !important;
  }

  .article-card {
    padding: 22px 18px;
  }

  blockquote {
    padding: 18px 18px 18px 48px;
  }

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

  #faq summary {
    padding: 15px 46px 15px 18px;
    font-size: 0.95rem;
  }

  #faq details p {
    padding: 0 18px 16px;
    font-size: 0.9rem;
  }

  .contact-list {
    grid-template-columns: 1fr;
  }

  .contact-list li {
    padding: 15px 16px !important;
    font-size: 0.9rem;
  }

  .sitemap-list a,
  .friend-links a {
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .footer-inner {
    padding: 32px 18px 28px;
  }

  .footer-inner p {
    font-size: 0.82rem;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 46px;
    height: 46px;
    font-size: 0.66rem;
  }

  #back-to-top::before {
    top: 6px;
    font-size: 0.78rem;
  }
}

@media (max-width: 380px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .brand-name {
    display: none;
  }
}

/* ===== Accessibility: 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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero {
    animation: none;
  }

  .hero::after {
    animation: none;
  }
}

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

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

  .section,
  .hero,
  .card,
  .article-card {
    box-shadow: none;
    border: 1px solid #ddd;
    background: #fff;
  }

  .hero {
    color: #000;
  }

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