:root {
  --sakura-primary: #f56ea8;
  --sakura-primary-dark: #d94f8a;
  --sakura-primary-light: #ff9ec7;
  --sakura-secondary: #7b6cf6;
  --sakura-accent: #5ec8e5;
  --sakura-gradient: linear-gradient(135deg, #f56ea8 0%, #7b6cf6 50%, #5ec8e5 100%);
  --sakura-gradient-soft: linear-gradient(135deg, rgba(245, 110, 168, 0.15) 0%, rgba(123, 108, 246, 0.15) 50%, rgba(94, 200, 229, 0.15) 100%);
  --bg-body: #fdf7fa;
  --bg-card: #ffffff;
  --bg-card-hover: #fff5f9;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.5);
  --bg-header: rgba(253, 247, 250, 0.85);
  --text-primary: #2d2333;
  --text-secondary: #5c4a63;
  --text-muted: #8e7d96;
  --border-color: #f0e4ec;
  --shadow-sm: 0 2px 8px rgba(245, 110, 168, 0.08);
  --shadow-md: 0 8px 24px rgba(245, 110, 168, 0.12);
  --shadow-lg: 0 16px 48px rgba(123, 108, 246, 0.16);
  --shadow-glow: 0 0 24px rgba(245, 110, 168, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #14101a;
    --bg-card: #1e1828;
    --bg-card-hover: #262036;
    --bg-glass: rgba(30, 24, 40, 0.75);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --bg-header: rgba(20, 16, 26, 0.88);
    --text-primary: #f0eaf5;
    --text-secondary: #c4b8cf;
    --text-muted: #8e7d96;
    --border-color: #2e2638;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(245, 110, 168, 0.35);
    --sakura-gradient-soft: linear-gradient(135deg, rgba(245, 110, 168, 0.12) 0%, rgba(123, 108, 246, 0.12) 50%, rgba(94, 200, 229, 0.12) 100%);
  }
}

*,
*::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 10% 0%, rgba(245, 110, 168, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 90% 20%, rgba(123, 108, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 100%, rgba(94, 200, 229, 0.06) 0%, transparent 50%);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

a:focus-visible {
  outline: 2px solid var(--sakura-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  list-style: none;
}

/* ============ Header ============ */
header {
  position: relative;
  padding: 100px 24px 80px;
  background: var(--sakura-gradient);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  overflow: hidden;
  text-align: center;
  color: #ffffff;
}

header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.12) 0%, transparent 40%);
  pointer-events: none;
}

header::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--bg-body);
  clip-path: ellipse(75% 100% at 50% 100%);
  pointer-events: none;
}

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

header h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
  animation: fadeInUp 0.8s ease both;
}

header > p {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto 40px;
  font-size: clamp(0.9rem, 1.6vw, 1.05rem);
  line-height: 1.8;
  opacity: 0.95;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.12);
  animation: fadeInUp 0.8s ease 0.15s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ Navigation ============ */
header nav {
  position: relative;
  z-index: 2;
  animation: fadeInUp 0.8s ease 0.3s both;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 1000px;
  margin: 0 auto;
}

header nav ul li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

header nav ul li a:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  color: #ffffff;
}

/* ============ Main Layout ============ */
main {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

main section {
  margin-bottom: 48px;
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base);
  animation: sectionReveal 0.7s ease both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

@keyframes sectionReveal {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main section:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(245, 110, 168, 0.25);
}

main section:nth-child(even) {
  background: var(--sakura-gradient-soft);
}

/* ============ Section Headings ============ */
main section > h2 {
  position: relative;
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  padding-left: 18px;
  line-height: 1.4;
}

main section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  background: var(--sakura-gradient);
  border-radius: var(--radius-full);
}

main section > h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 10px;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

main section > h3:hover {
  color: var(--sakura-primary);
}

main section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.95rem;
  line-height: 1.85;
}

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

/* ============ Lists ============ */
main section ul {
  display: grid;
  gap: 10px;
}

main section ul li {
  position: relative;
  padding: 12px 16px 12px 40px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

main section ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--sakura-gradient);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(245, 110, 168, 0.4);
}

main section ul li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(245, 110, 168, 0.3);
}

/* ============ Ordered List (HowTo) ============ */
main section ol {
  counter-reset: step-counter;
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

main section ol li {
  position: relative;
  counter-increment: step-counter;
  padding: 16px 20px 16px 56px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

main section ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sakura-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(245, 110, 168, 0.3);
}

main section ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

/* ============ Blockquotes (Reviews) ============ */
main section blockquote {
  position: relative;
  margin: 16px 0;
  padding: 24px 28px 24px 56px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-left: 4px solid var(--sakura-primary);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

main section blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 8px;
  font-size: 3rem;
  line-height: 1;
  color: var(--sakura-primary-light);
  font-family: Georgia, serif;
  opacity: 0.6;
}

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

main section blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ============ Article Cards ============ */
main section article {
  position: relative;
  margin-bottom: 20px;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
  overflow: hidden;
}

main section article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--sakura-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

main section article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(245, 110, 168, 0.3);
}

main section article:hover::before {
  transform: scaleX(1);
}

main section article h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

main section article:hover h3 {
  color: var(--sakura-primary);
}

main section article p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

main section article p:first-of-type {
  font-size: 0.8rem;
  color: var(--sakura-primary);
  font-weight: 500;
  letter-spacing: 0.02em;
}

main section article p a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--sakura-primary);
  padding: 6px 16px;
  border: 1px solid var(--sakura-primary);
  border-radius: var(--radius-full);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

main section article p a::after {
  content: "\2192";
  transition: transform var(--transition-fast);
}

main section article p a:hover {
  background: var(--sakura-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

main section article p a:hover::after {
  transform: translateX(4px);
}

/* ============ FAQ Section ============ */
#faq h3 {
  position: relative;
  padding: 16px 20px 16px 48px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 1rem;
  cursor: default;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

#faq h3::before {
  content: "Q";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sakura-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  border-radius: 50%;
}

#faq h3:hover {
  background: var(--bg-card-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#faq h3 + p {
  padding: 12px 20px 12px 48px;
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
  border-left: 2px solid var(--border-color);
  margin-left: 24px;
  transition: border-color var(--transition-fast);
}

#faq h3:hover + p {
  border-left-color: var(--sakura-primary);
}

/* ============ Contact Section ============ */
#contact p {
  position: relative;
  padding: 10px 16px 10px 36px;
  background: var(--bg-card-hover);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 0.9rem;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

#contact p::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--sakura-primary);
  border-radius: 50%;
}

#contact p:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ============ Author & Legal ============ */
#author p,
#legal p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

#legal h2 {
  margin-top: 28px;
}

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

/* ============ Footer ============ */
footer {
  position: relative;
  padding: 48px 24px;
  text-align: center;
  background: var(--bg-header);
  border-top: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  max-width: 400px;
  height: 2px;
  background: var(--sakura-gradient);
  border-radius: var(--radius-full);
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  line-height: 1.7;
}

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

/* ============ Sitemap & Links ============ */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#sitemap ul li,
#links ul li {
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  transform: none !important;
  box-shadow: none !important;
}

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

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: var(--sakura-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ============ Responsive Design ============ */
@media (max-width: 768px) {
  header {
    padding: 72px 20px 60px;
  }

  header nav ul {
    gap: 6px;
  }

  header nav ul li a {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  main {
    padding: 0 16px 56px;
  }

  main section {
    padding: 24px 20px;
    margin-bottom: 32px;
    border-radius: var(--radius-md);
  }

  main section > h2 {
    font-size: 1.15rem;
    padding-left: 14px;
    margin-bottom: 18px;
  }

  main section > h3 {
    font-size: 1rem;
  }

  main section article {
    padding: 18px 20px;
  }

  main section blockquote {
    padding: 18px 20px 18px 48px;
  }

  #faq h3 {
    padding: 14px 16px 14px 42px;
    font-size: 0.92rem;
  }

  #faq h3 + p {
    padding: 10px 16px 10px 42px;
    margin-left: 16px;
  }

  footer {
    padding: 36px 20px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  header {
    padding: 56px 16px 48px;
  }

  header nav ul {
    gap: 5px;
  }

  header nav ul li a {
    padding: 5px 12px;
    font-size: 0.75rem;
  }

  main {
    padding: 0 12px 40px;
  }

  main section {
    padding: 20px 16px;
    margin-bottom: 24px;
  }

  main section ul li {
    padding: 10px 12px 10px 34px;
    font-size: 0.88rem;
  }

  main section ol li {
    padding: 14px 16px 14px 48px;
    font-size: 0.88rem;
  }

  main section article p a {
    padding: 5px 12px;
    font-size: 0.8rem;
  }
}

/* ============ 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;
  }

  header {
    animation: none;
  }

  main section {
    animation: none;
    opacity: 1;
  }
}

/* ============ Print Styles ============ */
@media print {
  header {
    background: none;
    color: var(--text-primary);
    padding: 20px 0;
  }

  header::after {
    display: none;
  }

  header nav {
    display: none;
  }

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

  footer {
    border-top: 1px solid #ddd;
  }
}