:root {
  --primary: #FF6B9D;
  --primary-dark: #E8548A;
  --primary-light: #FFB6C1;
  --primary-soft: #FFF0F5;
  --primary-glow: rgba(255, 107, 157, 0.35);
  --accent: #FFD1DC;
  --accent-2: #C084FC;
  --text-main: #2D2430;
  --text-sub: #6E5F6B;
  --text-muted: #9A8C96;
  --bg: #FFFAFC;
  --bg-alt: #FFF5F8;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 107, 157, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --shadow-sm: 0 2px 10px rgba(255, 107, 157, 0.08);
  --shadow-md: 0 8px 28px rgba(255, 107, 157, 0.14);
  --shadow-lg: 0 18px 50px rgba(255, 107, 157, 0.2);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --nav-bg: rgba(255, 250, 252, 0.82);
  --gradient-hero: linear-gradient(135deg, #FF6B9D 0%, #FF9EC4 40%, #C084FC 100%);
  --gradient-soft: linear-gradient(135deg, #FFF0F5 0%, #FFE4EF 50%, #F3E8FF 100%);
  --gradient-btn: linear-gradient(135deg, #FF6B9D 0%, #FF8FB8 100%);
  --gradient-line: linear-gradient(90deg, #FF6B9D, #C084FC);
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition: 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  --maxw: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #FF7FAE;
    --primary-dark: #FF5C97;
    --primary-light: #B85C7E;
    --primary-soft: #2A1B24;
    --primary-glow: rgba(255, 127, 174, 0.4);
    --accent: #7A3F55;
    --accent-2: #A78BFA;
    --text-main: #F5EAF0;
    --text-sub: #C7B4C0;
    --text-muted: #9A8492;
    --bg: #17111A;
    --bg-alt: #1E1622;
    --card-bg: rgba(42, 30, 40, 0.62);
    --card-border: rgba(255, 127, 174, 0.22);
    --glass-bg: rgba(46, 32, 44, 0.55);
    --glass-border: rgba(255, 127, 174, 0.18);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 18px 50px rgba(0, 0, 0, 0.55);
    --nav-bg: rgba(23, 17, 26, 0.85);
    --gradient-hero: linear-gradient(135deg, #8A2E55 0%, #6D2A6B 45%, #3B2A6B 100%);
    --gradient-soft: linear-gradient(135deg, #241826 0%, #2A1B2E 50%, #221A33 100%);
    --gradient-btn: linear-gradient(135deg, #FF7FAE 0%, #C084FC 100%);
    --gradient-line: linear-gradient(90deg, #FF7FAE, #A78BFA);
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-main);
  background: var(--bg);
  background-image:
    radial-gradient(circle at 8% 6%, rgba(255, 107, 157, 0.1), transparent 42%),
    radial-gradient(circle at 92% 12%, rgba(192, 132, 252, 0.1), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(255, 182, 193, 0.12), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

@media (prefers-color-scheme: dark) {
  body {
    background-image:
      radial-gradient(circle at 8% 6%, rgba(255, 127, 174, 0.12), transparent 42%),
      radial-gradient(circle at 92% 12%, rgba(167, 139, 250, 0.12), transparent 40%),
      radial-gradient(circle at 50% 100%, rgba(138, 46, 85, 0.16), transparent 55%);
  }
}

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

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

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

p {
  margin: 0 0 1em;
}

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

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

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text-main);
}

h1 {
  font-size: clamp(1.7rem, 4.4vw, 2.9rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  position: relative;
  padding-bottom: 0.55em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-line);
}

h3 {
  font-size: clamp(1.08rem, 2.2vw, 1.32rem);
  color: var(--text-main);
}

h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.55em;
  border-radius: 50%;
  background: var(--gradient-line);
  vertical-align: middle;
  transform: translateY(-1px);
}

::selection {
  background: var(--primary);
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

#top {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
}

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

.brand-bar {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
}

.brand-name {
  margin: 0;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.brand-slogan {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-sub);
  letter-spacing: 0.03em;
}

header nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

header nav::-webkit-scrollbar {
  display: none;
}

header nav ul {
  display: flex;
  gap: 6px;
  flex-wrap: nowrap;
  min-width: max-content;
}

header nav a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-sub);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

header nav a:hover,
header nav a:focus-visible {
  color: #fff;
  background: var(--gradient-btn);
  box-shadow: 0 6px 18px var(--primary-glow);
  transform: translateY(-2px);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 40px;
}

section {
  margin: 34px 0;
  padding: clamp(22px, 4vw, 44px);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  animation: fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

section:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 157, 0.3);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

#hero {
  position: relative;
  margin-top: 28px;
  padding: clamp(28px, 5vw, 56px);
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: fadeUp 0.7s both, shimmer 14s ease infinite;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  color: #fff;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.28), transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.18), transparent 50%);
  pointer-events: none;
}

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

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
}

#hero h1::after {
  display: none;
}

#hero .lead {
  font-size: clamp(0.95rem, 1.7vw, 1.08rem);
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.95);
  max-width: 62ch;
}

#hero .lead strong {
  color: #fff;
  background: rgba(255, 255, 255, 0.22);
  padding: 0 6px;
  border-radius: 6px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

#hero figure {
  margin: 26px 0 0;
  padding: 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: var(--shadow-md);
  animation: floatSoft 7s ease-in-out infinite;
}

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

#hero figcaption {
  margin-top: 12px;
  font-size: 0.86rem;
  text-align: center;
  color: var(--text-sub);
}

@media (prefers-color-scheme: dark) {
  #hero figcaption {
    color: #E9D5E1;
  }
}

section > h3 {
  margin-top: 1.6em;
}

section > h3:first-of-type {
  margin-top: 0.4em;
}

#articles article {
  position: relative;
  margin: 22px 0;
  padding: 22px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--accent-2);
}

#articles article h3 {
  margin-top: 0;
}

#articles article > p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

#articles article a {
  display: inline-block;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--primary-soft);
  color: var(--primary-dark);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

#articles article a:hover {
  color: #fff;
  background: var(--gradient-btn);
  transform: translateX(4px);
  box-shadow: 0 6px 18px var(--primary-glow);
}

#faq details {
  margin: 12px 0;
  padding: 4px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#faq details[open] {
  border-color: rgba(255, 107, 157, 0.4);
  box-shadow: var(--shadow-md);
  background: var(--card-bg);
}

#faq details:hover {
  border-color: rgba(255, 107, 157, 0.35);
}

#faq summary {
  position: relative;
  padding: 16px 34px 16px 0;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

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

#faq summary:hover {
  color: var(--primary-dark);
}

#faq details p {
  margin: 0 0 18px;
  color: var(--text-sub);
  font-size: 0.94rem;
  animation: fadeUp 0.4s ease both;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

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

#sitemap a,
#links a {
  display: block;
  padding: 12px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-sub);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-3px);
  color: #fff;
  background: var(--gradient-btn);
  border-color: transparent;
  box-shadow: 0 10px 24px var(--primary-glow);
}

#contact p {
  font-size: 0.94rem;
}

#contact h3 {
  margin-top: 1.8em;
}

#legal h3 {
  margin-top: 1.5em;
}

#legal p {
  color: var(--text-sub);
  font-size: 0.94rem;
}

footer[role="contentinfo"] {
  margin-top: 20px;
  padding: 44px 20px 36px;
  background: var(--gradient-soft);
  border-top: 1px solid var(--card-border);
  text-align: center;
  color: var(--text-sub);
  font-size: 0.86rem;
}

footer[role="contentinfo"] p {
  max-width: var(--maxw);
  margin: 0 auto 10px;
  line-height: 1.9;
}

footer[role="contentinfo"] p:first-child {
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.03em;
}

footer[role="contentinfo"] a {
  font-weight: 600;
  color: var(--primary-dark);
  padding: 2px 6px;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}

footer[role="contentinfo"] a:hover {
  background: var(--primary);
  color: #fff;
}

@media (max-width: 900px) {
  main {
    padding: 0 14px 30px;
  }

  section {
    margin: 22px 0;
    border-radius: var(--radius);
  }

  #hero {
    border-radius: var(--radius);
  }

  .brand-bar {
    padding: 12px 14px 8px;
  }

  header nav {
    padding: 0 14px 10px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
    line-height: 1.8;
  }

  h2::after {
    width: 48px;
    height: 3px;
  }

  section {
    padding: 20px 16px;
  }

  #hero {
    padding: 24px 18px;
  }

  #hero figure {
    padding: 10px;
  }

  #articles article {
    padding: 18px 16px;
  }

  #faq details {
    padding: 2px 14px;
  }

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

  .brand-slogan {
    font-size: 0.78rem;
  }

  footer[role="contentinfo"] {
    padding: 30px 14px 26px;
  }
}

@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;
  }
}

@media print {
  header[role="banner"],
  footer[role="contentinfo"] {
    position: static;
  }

  section,
  #hero {
    box-shadow: none;
    border: 1px solid #ccc;
    background: #fff;
    color: #000;
    animation: none;
  }

  #hero h1,
  #hero .lead,
  #hero .lead strong {
    color: #000;
    background: none;
  }
}