:root {
  --primary: #ff5722;
  --primary-dark: #e64a19;
  --primary-light: #ff8a65;
  --accent: #ffd54f;
  --accent-dark: #ffb300;
  --gradient-1: linear-gradient(135deg, #ff5722 0%, #ff9800 50%, #ffd54f 100%);
  --gradient-2: linear-gradient(135deg, #ff8a65 0%, #ff5722 100%);
  --gradient-hero: linear-gradient(135deg, #ff5722 0%, #e91e63 45%, #9c27b0 100%);
  --bg: #fff9f5;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --bg-glass-hover: rgba(255, 255, 255, 0.8);
  --text: #2b1d16;
  --text-secondary: #6b5a52;
  --text-muted: #9a8a82;
  --border: rgba(255, 87, 34, 0.15);
  --border-strong: rgba(255, 87, 34, 0.3);
  --shadow-sm: 0 2px 8px rgba(255, 87, 34, 0.08);
  --shadow-md: 0 8px 24px rgba(255, 87, 34, 0.12);
  --shadow-lg: 0 16px 48px rgba(255, 87, 34, 0.16);
  --shadow-glow: 0 0 32px rgba(255, 87, 34, 0.35);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --blur: 16px;
  --transition: 0.3s 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;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14100e;
    --bg-alt: #1c1714;
    --bg-card: rgba(40, 32, 28, 0.72);
    --bg-glass: rgba(40, 32, 28, 0.55);
    --bg-glass-hover: rgba(52, 42, 36, 0.8);
    --text: #f5ede8;
    --text-secondary: #c9b8ae;
    --text-muted: #8a7a70;
    --border: rgba(255, 138, 101, 0.18);
    --border-strong: rgba(255, 138, 101, 0.35);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 32px rgba(255, 87, 34, 0.45);
    --gradient-hero: linear-gradient(135deg, #bf360c 0%, #880e4f 45%, #4a148c 100%);
  }
}

*,
*::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-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  background-image: radial-gradient(
      ellipse 80% 50% at 50% -20%,
      rgba(255, 87, 34, 0.08),
      transparent
    ),
    radial-gradient(
      ellipse 60% 40% at 100% 100%,
      rgba(255, 213, 79, 0.06),
      transparent
    );
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
}
h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
}
h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
}
h4 {
  font-size: clamp(1.02rem, 1.8vw, 1.15rem);
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 12px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-pill);
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header:hover {
  background: var(--bg-glass-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;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}

.brand:hover .brand-logo {
  transform: rotate(-6deg) scale(1.08);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  letter-spacing: 0.02em;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

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

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

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--primary);
  background: rgba(255, 87, 34, 0.08);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

#main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  position: relative;
  margin: 32px 0 40px;
  padding: clamp(40px, 7vw, 88px) clamp(24px, 5vw, 64px);
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-lg);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  z-index: -1;
  pointer-events: none;
}

.hero::before {
  width: 420px;
  height: 420px;
  top: -140px;
  right: -100px;
  background: radial-gradient(circle, #ffd54f, transparent 70%);
  animation: float 12s ease-in-out infinite;
}

.hero::after {
  width: 360px;
  height: 360px;
  bottom: -160px;
  left: -80px;
  background: radial-gradient(circle, #ff8a65, transparent 70%);
  animation: float 16s ease-in-out infinite reverse;
}

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

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  animation: fadeUp 0.9s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.hero h1 {
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 720px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}

.stat {
  padding: 16px 12px;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.stat:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.26);
}

.stat-num {
  display: block;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat span {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), color var(--transition);
}

.btn-primary {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  color: var(--primary-dark);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-3px) scale(1.03);
  color: #fff;
}

.breadcrumb {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--primary);
}

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

.section {
  margin: 40px 0;
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 48px);
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  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 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

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

.section > h2 {
  position: relative;
  padding-bottom: 16px;
  margin-bottom: 24px;
  color: var(--text);
}

.section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-2);
}

.section > h2::after {
  content: "";
  position: absolute;
  left: 64px;
  bottom: 1px;
  width: 100%;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

.section h3 {
  margin: 32px 0 14px;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section h3::before {
  content: "";
  width: 6px;
  height: 1.1em;
  border-radius: 3px;
  background: var(--gradient-2);
  flex-shrink: 0;
}

.section h4 {
  margin: 22px 0 10px;
  color: var(--text);
  padding-left: 14px;
  border-left: 3px solid var(--primary-light);
}

.section p {
  font-size: 0.98rem;
  line-height: 1.85;
}

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

.news-list {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

.news-list li {
  position: relative;
  padding: 16px 20px 16px 48px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition), background var(--transition);
}

.news-list li::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-2);
  box-shadow: 0 0 0 4px rgba(255, 87, 34, 0.15);
}

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

.news-list strong {
  color: var(--text);
  font-weight: 700;
}

.article-card {
  position: relative;
  margin: 20px 0;
  padding: 24px 28px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition), background var(--transition);
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-2);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  background: var(--bg-glass-hover);
}

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

.article-card h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1.15rem;
}

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

.article-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.article-card p:not(.article-meta) {
  font-size: 0.94rem;
  margin-bottom: 14px;
}

.article-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 87, 34, 0.08);
  transition: background var(--transition), color var(--transition),
    transform var(--transition);
}

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

.article-card a:hover {
  background: var(--gradient-2);
  color: #fff;
  transform: translateX(2px);
}

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

#faq details {
  margin: 12px 0;
  background: var(--bg-glass);
  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-glass-hover);
}

#faq summary {
  position: relative;
  padding: 18px 56px 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition), background var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--primary);
  background: rgba(255, 87, 34, 0.1);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

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

#faq summary:hover {
  color: var(--primary);
  background: rgba(255, 87, 34, 0.04);
}

#faq details p {
  padding: 0 22px 20px;
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  animation: fadeUp 0.4s ease both;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.contact-info li {
  padding: 16px 20px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.94rem;
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.contact-info li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-strong);
}

.contact-info strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.82rem;
  color: var(--primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sitemap-list,
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.sitemap-list a,
.friend-links a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: transform var(--transition), background var(--transition),
    color var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.sitemap-list a:hover,
.friend-links a:hover {
  color: #fff;
  background: var(--gradient-2);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.site-footer {
  margin-top: 64px;
  background: linear-gradient(
    180deg,
    var(--bg-alt) 0%,
    rgba(255, 87, 34, 0.04) 100%
  );
  border-top: 1px solid var(--border);
  padding: 56px 24px 32px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer-col h3 {
  position: relative;
  margin-bottom: 18px;
  padding-bottom: 10px;
  font-size: 1rem;
  color: var(--text);
}

.footer-col h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient-2);
}

.footer-col p,
.footer-col li {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-legal {
  max-width: var(--max-width);
  margin: 32px auto 0;
}

.footer-legal h3 {
  margin: 22px 0 8px;
  font-size: 0.95rem;
  color: var(--text);
}

.footer-legal p {
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.footer-copy {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
  text-align: center;
  font-size: 0.8rem !important;
  color: var(--text-muted) !important;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-2);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0.85;
  transition: transform var(--transition), opacity var(--transition),
    box-shadow var(--transition);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  opacity: 1;
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-glow);
}

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

@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
    gap: 16px;
  }

  .main-nav a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

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

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-glass-hover);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .main-nav.is-open {
    max-height: 520px;
    overflow-y: auto;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
  }

  .main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .main-nav a::after {
    display: none;
  }

  .hero {
    margin: 20px 0 28px;
    border-radius: var(--radius-lg);
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  #main-content {
    padding: 0 16px;
  }

  .section {
    margin: 24px 0;
    border-radius: var(--radius-md);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 0 14px;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-logo {
    width: 34px;
    height: 34px;
  }

  .hero {
    padding: 32px 20px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 14px 24px;
  }

  .stat {
    padding: 12px 8px;
  }

  .stat-num {
    font-size: 1.25rem;
  }

  .stat span {
    font-size: 0.72rem;
  }

  .section {
    padding: 24px 18px;
  }

  .article-card {
    padding: 20px 18px;
  }

  #faq summary {
    padding: 16px 50px 16px 16px;
    font-size: 0.95rem;
  }

  #faq details p {
    padding: 0 16px 18px;
  }

  .news-list li {
    padding: 14px 16px 14px 42px;
  }

  .news-list li::before {
    left: 16px;
    top: 21px;
  }

  .sitemap-list a,
  .friend-links a {
    padding: 7px 16px;
    font-size: 0.85rem;
  }

  .site-footer {
    padding: 40px 16px 24px;
  }
}