:root {
  --sakura-50: #fff7f9;
  --sakura-100: #fde8ee;
  --sakura-200: #f9c9d6;
  --sakura-300: #f7b6c8;
  --sakura-400: #ef94ad;
  --sakura-500: #e0708f;
  --sakura-600: #c4526f;
  --ink-900: #2b1e23;
  --ink-700: #4a3a40;
  --ink-500: #6f5c63;
  --ink-300: #9a8790;
  --bg: #fffafb;
  --bg-soft: #fff2f6;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(247, 182, 200, 0.35);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.6);
  --shadow-sm: 0 2px 8px rgba(196, 82, 111, 0.08);
  --shadow-md: 0 8px 28px rgba(196, 82, 111, 0.12);
  --shadow-lg: 0 18px 48px rgba(196, 82, 111, 0.18);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --gradient-hero: linear-gradient(135deg, #ffe3ec 0%, #ffd0de 30%, #fbe3ea 60%, #f3ecff 100%);
  --gradient-accent: linear-gradient(120deg, #f7b6c8 0%, #ef94ad 50%, #c9a7e8 100%);
  --gradient-soft: linear-gradient(180deg, #fff7f9 0%, #fffafb 100%);
  --font-sans: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --transition: 0.35s var(--ease);
}

@media (prefers-color-scheme: dark) {
  :root {
    --sakura-50: #1e1519;
    --sakura-100: #2a1c22;
    --sakura-200: #4a2c37;
    --sakura-300: #d98aa3;
    --sakura-400: #ef94ad;
    --sakura-500: #f2a3ba;
    --sakura-600: #f7b6c8;
    --ink-900: #f6eef1;
    --ink-700: #e2d3d9;
    --ink-500: #b9a4ac;
    --ink-300: #8a7580;
    --bg: #161014;
    --bg-soft: #1e1519;
    --card-bg: rgba(42, 28, 34, 0.72);
    --card-border: rgba(217, 138, 163, 0.22);
    --glass-bg: rgba(30, 21, 25, 0.62);
    --glass-border: rgba(247, 182, 200, 0.18);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
    --gradient-hero: linear-gradient(135deg, #2a1c22 0%, #3a2130 35%, #241a2c 70%, #1a1420 100%);
    --gradient-accent: linear-gradient(120deg, #d98aa3 0%, #c4526f 50%, #8a6bb8 100%);
    --gradient-soft: linear-gradient(180deg, #1e1519 0%, #161014 100%);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(247, 182, 200, 0.18), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(201, 167, 232, 0.14), transparent 45%),
    radial-gradient(circle at 50% 100%, rgba(249, 201, 214, 0.16), transparent 55%);
  background-attachment: fixed;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--sakura-600);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--sakura-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--sakura-400);
  outline-offset: 2px;
  border-radius: 6px;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink-900);
  line-height: 1.35;
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  padding-bottom: 0.15em;
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  bottom: 0.28em;
  width: 6px;
  border-radius: 6px;
  background: var(--gradient-accent);
}

h3 {
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  font-weight: 600;
  margin-top: 1.4em;
  color: var(--ink-900);
}

p {
  margin: 0 0 1em;
  color: var(--ink-700);
}

strong {
  color: var(--sakura-600);
  font-weight: 600;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.3em;
  color: var(--ink-700);
}

li {
  margin-bottom: 0.35em;
}

/* ---------- Header ---------- */
header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.topbar {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 22px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  white-space: nowrap;
}

.brand-logo svg {
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 2px 6px rgba(247, 182, 200, 0.6));
  animation: logoFloat 6s ease-in-out infinite;
}

.brand-logo strong {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--ink-900);
  letter-spacing: 0.04em;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-3px) rotate(4deg); }
}

nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
  color: var(--ink-700);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] a:hover,
nav[aria-label="主导航"] a:focus-visible {
  background: var(--sakura-100);
  color: var(--sakura-600);
  text-decoration: none;
  transform: translateY(-2px);
}

form[role="search"] {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 4px 4px 4px 14px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

form[role="search"]:focus-within {
  border-color: var(--sakura-300);
  box-shadow: 0 0 0 4px rgba(247, 182, 200, 0.22);
}

form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

form[role="search"] input[type="search"] {
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--ink-900);
  width: 160px;
  padding: 6px 0;
  outline: none;
}

form[role="search"] input::placeholder {
  color: var(--ink-300);
}

form[role="search"] button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--gradient-accent);
  box-shadow: 0 4px 12px rgba(224, 112, 143, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

form[role="search"] button:hover {
  transform: translateY(-1px) scale(1.03);
  filter: brightness(1.05);
  box-shadow: 0 6px 18px rgba(224, 112, 143, 0.45);
}

form[role="search"] button:active {
  transform: translateY(0) scale(0.98);
}

/* ---------- Main layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 22px 40px;
  display: flex;
  flex-direction: column;
  gap: 34px;
}

section {
  position: relative;
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 4vw, 44px);
  box-shadow: var(--shadow-md);
  animation: riseIn 0.9s var(--ease) both;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

section:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--sakura-200);
}

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

section:nth-of-type(1) { animation-delay: 0.02s; }
section:nth-of-type(2) { animation-delay: 0.06s; }
section:nth-of-type(3) { animation-delay: 0.1s; }
section:nth-of-type(4) { animation-delay: 0.14s; }
section:nth-of-type(5) { animation-delay: 0.18s; }
section:nth-of-type(6) { animation-delay: 0.22s; }
section:nth-of-type(7) { animation-delay: 0.26s; }
section:nth-of-type(8) { animation-delay: 0.3s; }
section:nth-of-type(9) { animation-delay: 0.34s; }
section:nth-of-type(10) { animation-delay: 0.38s; }
section:nth-of-type(11) { animation-delay: 0.42s; }
section:nth-of-type(12) { animation-delay: 0.46s; }
section:nth-of-type(13) { animation-delay: 0.5s; }

/* ---------- Hero ---------- */
#hero {
  background: var(--gradient-hero);
  overflow: hidden;
  border-radius: var(--radius-xl);
  padding: clamp(28px, 5vw, 56px);
  text-align: left;
}

#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 82% 22%, rgba(255, 255, 255, 0.55), transparent 26%),
    radial-gradient(circle at 18% 78%, rgba(255, 255, 255, 0.35), transparent 30%);
  pointer-events: none;
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero > p {
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  color: var(--ink-700);
}

.hero-visual {
  margin: 26px 0 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
  transition: transform 0.6s var(--ease), box-shadow var(--transition);
}

.hero-visual:hover {
  transform: translateY(-6px) scale(1.01);
}

.hero-visual svg {
  width: 100%;
  height: auto;
  display: block;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  font-size: 0.85rem;
  color: var(--ink-500);
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--sakura-400);
}

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

.update-info {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ink-500);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 6px 16px;
  margin: 0;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* ---------- Articles ---------- */
#articles {
  display: grid;
  gap: 18px;
}

#articles h2 {
  grid-column: 1 / -1;
}

#articles article {
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--sakura-300);
  background: var(--sakura-50);
}

#articles article h3 {
  margin-top: 0;
  font-size: 1.1rem;
  transition: color var(--transition);
}

#articles article:hover h3 {
  color: var(--sakura-600);
}

#articles article p {
  font-size: 0.92rem;
  color: var(--ink-500);
  margin-bottom: 12px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #fff;
  -webkit-text-fill-color: #fff;
  box-shadow: 0 4px 12px rgba(224, 112, 143, 0.28);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

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

#articles article a:hover,
#articles article a:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 8px 20px rgba(224, 112, 143, 0.4);
}

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

/* ---------- FAQ ---------- */
#faq h3 {
  position: relative;
  padding-left: 30px;
  cursor: default;
}

#faq h3::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: 0.05em;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 3px 8px rgba(224, 112, 143, 0.3);
}

#faq p {
  padding-left: 30px;
  font-size: 0.94rem;
  color: var(--ink-500);
}

/* ---------- HowTo ---------- */
#howto {
  background:
    linear-gradient(180deg, rgba(247, 182, 200, 0.14), transparent 40%),
    var(--card-bg);
}

#howto h3 {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 8px;
  background: var(--sakura-100);
  color: var(--sakura-600);
  font-size: 1rem;
}

/* ---------- Contact ---------- */
#contact h3 {
  color: var(--sakura-600);
}

#contact p {
  background: var(--glass-bg);
  border-left: 4px solid var(--sakura-300);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 18px;
  font-size: 0.94rem;
}

/* ---------- Sitemap & Links ---------- */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

#sitemap li,
#links li {
  margin: 0;
}

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  color: var(--ink-700);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}

#sitemap a:hover,
#links a:hover,
#sitemap a:focus-visible,
#links a:focus-visible {
  text-decoration: none;
  transform: translateY(-3px);
  background: var(--gradient-accent);
  color: #fff;
  -webkit-text-fill-color: #fff;
  box-shadow: var(--shadow-md);
}

/* ---------- Legal ---------- */
#legal h3 {
  font-size: 1.02rem;
  color: var(--sakura-600);
}

#legal p {
  font-size: 0.92rem;
  color: var(--ink-500);
}

/* ---------- Footer ---------- */
footer[role="contentinfo"] {
  position: relative;
  margin-top: 20px;
  padding: 44px 22px 36px;
  text-align: center;
  background: var(--gradient-soft);
  border-top: 1px solid var(--card-border);
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(320px, 70%);
  height: 3px;
  border-radius: 0 0 6px 6px;
  background: var(--gradient-accent);
  opacity: 0.7;
}

footer[role="contentinfo"] p {
  margin: 0 auto 8px;
  max-width: 760px;
  font-size: 0.85rem;
  color: var(--ink-500);
}

footer[role="contentinfo"] p:last-child {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 14px;
}

footer[role="contentinfo"] a {
  color: var(--sakura-600);
  font-weight: 500;
}

footer[role="contentinfo"] a:hover {
  color: var(--sakura-500);
}

/* ---------- Scroll animation enhancement ---------- */
@supports (animation-timeline: view()) {
  section {
    animation: none;
    animation-timeline: view();
    animation-range: entry 0% entry 55%;
    animation-name: revealView;
    animation-fill-mode: both;
  }

  @keyframes revealView {
    from {
      opacity: 0;
      transform: translateY(36px) scale(0.985);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Responsive ---------- */
@media (min-width: 760px) {
  #articles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  #articles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand search"
      "nav nav";
    gap: 12px 16px;
  }

  .brand-logo { grid-area: brand; }

  form[role="search"] {
    grid-area: search;
  }

  form[role="search"] input[type="search"] {
    width: 120px;
  }

  nav[aria-label="主导航"] {
    grid-area: nav;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  nav[aria-label="主导航"]::-webkit-scrollbar {
    display: none;
  }

  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    justify-content: flex-start;
  }

  nav[aria-label="主导航"] a {
    white-space: nowrap;
  }
}

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

  .topbar {
    padding: 10px 14px;
  }

  .brand-logo strong {
    font-size: 1.05rem;
  }

  form[role="search"] {
    padding-left: 10px;
  }

  form[role="search"] input[type="search"] {
    width: 90px;
    font-size: 0.85rem;
  }

  form[role="search"] button {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  main {
    padding: 18px 14px 30px;
    gap: 22px;
  }

  section {
    border-radius: var(--radius-md);
    padding: 20px 18px;
  }

  #hero {
    border-radius: var(--radius-lg);
    padding: 22px 18px;
  }

  h2 {
    padding-left: 14px;
  }

  h2::before {
    width: 5px;
  }

  .hero-visual {
    margin: 18px 0;
  }

  #articles article {
    padding: 16px 16px;
  }

  #faq h3,
  #faq p {
    padding-left: 26px;
  }

  #sitemap a,
  #links a {
    padding: 7px 14px;
    font-size: 0.85rem;
  }

  footer[role="contentinfo"] {
    padding: 32px 16px 28px;
  }
}

@media (max-width: 360px) {
  form[role="search"] input[type="search"] {
    width: 70px;
  }

  .brand-logo svg {
    width: 24px;
    height: 24px;
  }
}