:root {
  --lemon-primary: #F5C518;
  --lemon-primary-dark: #D4A800;
  --lemon-primary-light: #FFF3C4;
  --lemon-accent: #2E7D32;
  --lemon-accent-light: #E8F5E9;
  --lemon-blue: #1E88E5;
  --lemon-purple: #8E24AA;
  --lemon-orange: #FB8C00;
  --bg-body: #FFFDF5;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #FFF8E1;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --bg-glass-strong: rgba(255, 255, 255, 0.82);
  --text-main: #2B2416;
  --text-secondary: #5D4037;
  --text-muted: #8A7A5C;
  --border-soft: rgba(245, 197, 24, 0.28);
  --border-glass: rgba(255, 255, 255, 0.6);
  --shadow-sm: 0 2px 8px rgba(93, 64, 55, 0.08);
  --shadow-md: 0 6px 24px rgba(93, 64, 55, 0.12);
  --shadow-lg: 0 16px 48px rgba(93, 64, 55, 0.16);
  --shadow-glow: 0 8px 32px rgba(245, 197, 24, 0.35);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gradient-banner: linear-gradient(135deg, #F5C518 0%, #FFE082 30%, #FFF8E1 60%, #E8F5E9 100%);
  --gradient-hero: linear-gradient(120deg, rgba(245, 197, 24, 0.92) 0%, rgba(255, 224, 130, 0.85) 45%, rgba(232, 245, 233, 0.9) 100%);
  --gradient-accent: linear-gradient(135deg, #F5C518, #FB8C00);
  --gradient-brand: linear-gradient(135deg, #2E7D32, #66BB6A);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --max-width: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --lemon-primary: #FFD54F;
    --lemon-primary-dark: #F5C518;
    --lemon-primary-light: #3E3520;
    --lemon-accent: #81C784;
    --lemon-accent-light: #1B3A1E;
    --lemon-blue: #64B5F6;
    --lemon-purple: #CE93D8;
    --lemon-orange: #FFB74D;
    --bg-body: #12100A;
    --bg-surface: #1C1910;
    --bg-surface-alt: #241F12;
    --bg-elevated: rgba(36, 31, 18, 0.78);
    --bg-glass: rgba(28, 25, 16, 0.6);
    --bg-glass-strong: rgba(28, 25, 16, 0.85);
    --text-main: #F5F0E1;
    --text-secondary: #D7CDB4;
    --text-muted: #9E9278;
    --border-soft: rgba(255, 213, 79, 0.2);
    --border-glass: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 8px 32px rgba(255, 213, 79, 0.25);
    --gradient-banner: linear-gradient(135deg, #3E3520 0%, #241F12 40%, #1B3A1E 100%);
    --gradient-hero: linear-gradient(120deg, rgba(62, 53, 32, 0.95) 0%, rgba(36, 31, 18, 0.9) 50%, rgba(27, 58, 30, 0.92) 100%);
    --gradient-accent: linear-gradient(135deg, #FFD54F, #FFB74D);
    --gradient-brand: linear-gradient(135deg, #2E7D32, #81C784);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  background-color: var(--bg-body);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(245, 197, 24, 0.14) 0%, transparent 38%),
    radial-gradient(circle at 88% 18%, rgba(46, 125, 50, 0.1) 0%, transparent 42%),
    radial-gradient(circle at 50% 92%, rgba(30, 136, 229, 0.08) 0%, transparent 46%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--lemon-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--lemon-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

p {
  margin: 0 0 1em;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--text-main);
  font-weight: 700;
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--lemon-primary-dark);
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  position: relative;
  padding-left: 1.1em;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  box-shadow: 0 0 12px rgba(245, 197, 24, 0.5);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--text-secondary);
}

h4 {
  font-size: 1.05rem;
  color: var(--lemon-accent);
}

blockquote {
  margin: 0;
}

/* ===== Header ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
}

.brand-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
}

.brand-name {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--lemon-primary-dark);
  position: relative;
  padding-left: 0.2em;
}

.brand-name::after {
  content: "";
  position: absolute;
  inset: -4px -10px;
  border-radius: var(--radius-sm);
  background: rgba(245, 197, 24, 0.18);
  z-index: -1;
  filter: blur(6px);
}

.brand-slogan {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

nav[aria-label="主导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 12px 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--lemon-primary) transparent;
}

nav[aria-label="主导航"]::-webkit-scrollbar {
  height: 4px;
}

nav[aria-label="主导航"]::-webkit-scrollbar-thumb {
  background: var(--lemon-primary);
  border-radius: var(--radius-pill);
}

nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  padding: 4px;
  min-width: max-content;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

nav[aria-label="主导航"] a:hover,
nav[aria-label="主导航"] a:focus-visible {
  color: var(--text-main);
  background: var(--lemon-primary-light);
  border-color: var(--border-soft);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== Main ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px 60px;
}

section {
  position: relative;
  margin-bottom: 32px;
  padding: 28px 26px;
  background: var(--bg-elevated);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

section:hover {
  box-shadow: var(--shadow-lg);
}

section:nth-of-type(1) {
  padding: 36px 30px;
  background: var(--gradient-hero);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow-glow);
  overflow: hidden;
}

section:nth-of-type(1)::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 197, 24, 0.55), transparent 70%);
  pointer-events: none;
  animation: floatBlob 8s ease-in-out infinite;
}

section:nth-of-type(1)::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 125, 50, 0.35), transparent 70%);
  pointer-events: none;
  animation: floatBlob 10s ease-in-out infinite reverse;
}

section:nth-of-type(1) h1 {
  position: relative;
  z-index: 1;
}

section:nth-of-type(1) p {
  position: relative;
  z-index: 1;
  color: var(--text-secondary);
}

section:nth-of-type(1) figure {
  position: relative;
  z-index: 1;
}

/* Stagger animation via nth-child */
section:nth-of-type(2) { animation-delay: 0.05s; }
section:nth-of-type(3) { animation-delay: 0.1s; }
section:nth-of-type(4) { animation-delay: 0.15s; }
section:nth-of-type(5) { animation-delay: 0.2s; }
section:nth-of-type(6) { animation-delay: 0.25s; }
section:nth-of-type(7) { animation-delay: 0.3s; }
section:nth-of-type(8) { animation-delay: 0.35s; }
section:nth-of-type(9) { animation-delay: 0.4s; }
section:nth-of-type(10) { animation-delay: 0.45s; }

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

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(16px, -18px) scale(1.08); }
}

/* ===== Figure ===== */
figure {
  margin: 24px 0;
  padding: 12px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  overflow: hidden;
}

figure:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--shadow-lg);
}

figure svg {
  border-radius: var(--radius-sm);
  width: 100%;
  height: auto;
}

figcaption {
  margin-top: 10px;
  font-size: 0.84rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.02em;
}

/* ===== Meta ===== */
.meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 8px 14px;
  background: var(--bg-glass);
  border-left: 3px solid var(--lemon-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  letter-spacing: 0.02em;
  display: inline-block;
}

/* ===== Articles / News ===== */
article {
  padding: 20px 22px;
  margin-bottom: 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-smooth);
}

article:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--lemon-primary);
}

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

article:last-of-type {
  margin-bottom: 0;
}

article h3 {
  margin-bottom: 0.4em;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

article:hover h3 {
  color: var(--lemon-primary-dark);
}

article p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

article p:last-child {
  margin-bottom: 0;
}

article a {
  display: inline-block;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: var(--lemon-primary-light);
  color: var(--lemon-primary-dark);
  border: 1px solid var(--border-soft);
  transition: all var(--transition-fast);
}

article a:hover {
  background: var(--gradient-accent);
  color: #2B2416;
  text-decoration: none;
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ===== Blockquotes (Reviews) ===== */
blockquote {
  position: relative;
  padding: 20px 22px 20px 56px;
  margin-bottom: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 16px;
  top: 4px;
  font-size: 3rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--lemon-primary);
  opacity: 0.85;
}

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

blockquote p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-style: italic;
}

/* ===== Lists (Contact / Sitemap / Links) ===== */
#contact ul,
#sitemap ul,
#links ul {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

#contact ul {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

#sitemap ul,
#links ul {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

#contact li,
#sitemap li,
#links li {
  padding: 10px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

#contact li:hover,
#sitemap li:hover,
#links li:hover {
  border-color: var(--lemon-primary);
  background: var(--lemon-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#sitemap li::before,
#links li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  vertical-align: middle;
}

#sitemap a,
#links a {
  font-weight: 500;
  color: var(--text-secondary);
}

#sitemap a:hover,
#links a:hover {
  color: var(--lemon-primary-dark);
  text-decoration: none;
}

/* ===== FAQ ===== */
#faq h3 {
  padding: 14px 18px;
  margin: 0 0 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-left: 4px solid var(--lemon-primary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 1rem;
  color: var(--text-main);
  cursor: default;
  transition: all var(--transition-fast);
}

#faq h3:hover {
  background: var(--lemon-primary-light);
  border-left-color: var(--lemon-orange);
}

#faq h3 + p {
  margin-top: 0;
  margin-bottom: 18px;
  padding: 16px 18px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.93rem;
  transition: background var(--transition-fast);
}

#faq h3 + p:hover {
  background: var(--bg-glass-strong);
}

/* ===== HowTo ===== */
#howto h4 {
  display: inline-block;
  padding: 6px 16px;
  margin: 18px 0 8px;
  background: var(--gradient-brand);
  color: #FFFFFF;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#howto h4:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

#howto h3 {
  margin-top: 26px;
  padding-bottom: 8px;
  border-bottom: 2px dashed var(--border-soft);
}

#howto p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Footer ===== */
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 44px;
  text-align: center;
  border-top: 1px solid var(--border-soft);
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

footer p {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

footer p:first-child {
  font-weight: 600;
  color: var(--text-secondary);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  main {
    padding: 20px 14px 44px;
  }

  section {
    padding: 22px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
  }

  section:nth-of-type(1) {
    padding: 26px 18px;
  }

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

  article {
    padding: 16px 16px;
  }
}

@media (max-width: 600px) {
  html {
    scroll-padding-top: 120px;
  }

  body {
    font-size: 15px;
    line-height: 1.75;
  }

  .brand-bar {
    padding: 12px 14px 8px;
    flex-direction: column;
    gap: 4px;
  }

  nav[aria-label="主导航"] {
    padding: 0 8px 8px;
  }

  nav[aria-label="主导航"] a {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  main {
    padding: 16px 10px 36px;
  }

  section {
    padding: 18px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
  }

  section:nth-of-type(1) {
    padding: 22px 14px;
  }

  h2 {
    padding-left: 0.95em;
  }

  h2::before {
    width: 5px;
  }

  figure {
    padding: 8px;
    margin: 18px 0;
  }

  #contact ul,
  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }

  blockquote {
    padding: 16px 14px 16px 42px;
  }

  blockquote::before {
    left: 10px;
    font-size: 2.4rem;
  }

  #faq h3 {
    padding: 12px 14px;
    font-size: 0.95rem;
  }

  #faq h3 + p {
    padding: 14px;
  }

  footer {
    padding: 24px 14px 36px;
  }
}

/* ===== 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;
  }
}

/* ===== Print ===== */
@media print {
  header,
  footer,
  nav {
    display: none;
  }

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

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