:root {
  --mango-primary: #FF6B35;
  --mango-primary-dark: #E5521C;
  --mango-secondary: #FFB347;
  --mango-accent: #FFD166;
  --mango-gradient: linear-gradient(135deg, #FF6B35 0%, #FFB347 55%, #FFD166 100%);
  --mango-gradient-soft: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(255, 179, 71, 0.12));
  --bg: #FFF9F4;
  --bg-alt: #FFFFFF;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --border: rgba(255, 107, 53, 0.14);
  --text: #2B2118;
  --text-soft: #6B5B4E;
  --text-muted: #9A8A7C;
  --shadow-sm: 0 2px 10px rgba(255, 107, 53, 0.08);
  --shadow-md: 0 8px 28px rgba(255, 107, 53, 0.12);
  --shadow-lg: 0 18px 48px rgba(255, 107, 53, 0.16);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --max-width: 1180px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #140F0B;
    --bg-alt: #1C1510;
    --surface: rgba(40, 30, 24, 0.62);
    --surface-strong: rgba(48, 36, 28, 0.9);
    --border: rgba(255, 179, 71, 0.18);
    --text: #F5EDE6;
    --text-soft: #C9B8A8;
    --text-muted: #8E7D6E;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
    --mango-gradient-soft: linear-gradient(135deg, rgba(255, 107, 53, 0.18), rgba(255, 179, 71, 0.1));
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 179, 71, 0.18), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(255, 107, 53, 0.14), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(255, 209, 102, 0.12), transparent 50%);
  pointer-events: none;
}

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

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

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

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

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

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.9rem);
  background: var(--mango-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.1rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1rem;
  position: relative;
  padding-left: 1.1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: var(--mango-gradient);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  margin: 1.6rem 0 0.7rem;
  color: var(--text);
}

h4 {
  font-size: 1.02rem;
  margin: 1.2rem 0 0.5rem;
  color: var(--mango-primary-dark);
}

p {
  margin-bottom: 1rem;
  color: var(--text-soft);
}

ul, ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.45rem;
  color: var(--text-soft);
}

strong {
  color: var(--text);
}

/* ============ HEADER / NAV ============ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.7rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

header nav > a {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  background: var(--mango-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

header nav ul li {
  margin: 0;
}

header nav ul li a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
}

header nav ul li a:hover {
  color: #fff;
  background: var(--mango-gradient);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ============ MAIN LAYOUT ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.6rem 1.2rem 3rem;
}

/* ============ BREADCRUMB ============ */
main > nav[aria-label="面包屑导航"] {
  margin-bottom: 1.6rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  padding: 0.55rem 1rem;
  margin: 0;
  background: var(--surface);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  width: fit-content;
  max-width: 100%;
}

main > nav[aria-label="面包屑导航"] ol li {
  margin: 0;
  color: var(--text-muted);
}

main > nav[aria-label="面包屑导航"] ol li:not(:last-child)::after {
  content: "/";
  margin-left: 0.4rem;
  color: var(--text-muted);
  opacity: 0.6;
}

main > nav[aria-label="面包屑导航"] ol li[aria-current="page"] {
  color: var(--mango-primary-dark);
  font-weight: 600;
}

/* ============ SECTIONS & CARDS ============ */
main > section {
  background: var(--surface);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 3.5vw, 2.6rem);
  margin-bottom: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

main > section:hover {
  box-shadow: var(--shadow-md);
}

main > section:nth-of-type(1) {
  background: var(--mango-gradient-soft), var(--surface-strong);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 107, 53, 0.22);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

main > section:nth-of-type(1)::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.35), transparent 70%);
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

main > section:nth-of-type(1) > p:first-of-type {
  font-size: 1.05rem;
  color: var(--text);
}

/* ============ FIGURE / HERO SVG ============ */
figure {
  margin: 1.6rem 0 0.4rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

figure svg {
  width: 100%;
  height: auto;
  display: block;
}

figcaption {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.6rem 1rem;
  background: var(--surface-strong);
  border-top: 1px solid var(--border);
}

/* ============ NEWS / ARTICLE CARDS ============ */
main article {
  background: var(--surface-strong);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

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

main article:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.3);
}

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

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

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

main article p {
  font-size: 0.92rem;
  margin-bottom: 0.55rem;
}

main article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

main article a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.28rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--mango-gradient-soft);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

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

main article a:hover {
  background: var(--mango-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

main article a:hover::after {
  transform: translateX(3px);
}

/* ============ FAQ ============ */
#faq h3 {
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: 0.85rem 1.1rem;
  margin: 1.2rem 0 0;
  font-size: 1rem;
  cursor: default;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  position: relative;
  padding-left: 2.4rem;
}

#faq h3::before {
  content: "Q";
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  background: var(--mango-gradient);
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

#faq h3 + p {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  padding: 0.9rem 1.1rem 1rem;
  margin-top: 0;
  font-size: 0.93rem;
}

#faq h3:hover {
  background: var(--mango-gradient-soft);
  color: var(--mango-primary-dark);
}

/* ============ HOWTO ============ */
#howto h4 {
  display: inline-block;
  background: var(--mango-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-left: 3px solid var(--mango-secondary);
  padding-left: 0.7rem;
  margin-left: 0.1rem;
}

#howto h4 + p {
  padding-left: 0.9rem;
  border-left: 2px dashed var(--border);
  margin-left: 0.1rem;
}

/* ============ CONTACT ============ */
#contact ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin: 1.2rem 0;
}

#contact ul li {
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#contact ul li::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--mango-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

#contact ul li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.3);
}

#contact ul li:hover::before {
  transform: scaleX(1);
}

/* ============ SITEMAP / LINKS ============ */
#sitemap-title + ul,
#links-title + ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

#sitemap-title + ul li,
#links-title + ul li {
  margin: 0;
}

#sitemap-title + ul li a,
#links-title + ul li a {
  display: inline-block;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: all var(--transition);
}

#sitemap-title + ul li a:hover,
#links-title + ul li a:hover {
  background: var(--mango-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-sm);
}

/* ============ LEGAL ============ */
#legal-title ~ h3 {
  font-size: 1rem;
  color: var(--mango-primary-dark);
  margin-top: 1.3rem;
  padding-left: 0.7rem;
  border-left: 3px solid var(--mango-secondary);
}

/* ============ FOOTER ============ */
footer {
  background: var(--surface-strong);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  border-top: 1px solid var(--border);
  padding: 2.2rem 1.2rem;
  text-align: center;
  margin-top: 1rem;
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--mango-gradient);
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

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

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

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-18px, 18px) scale(1.06);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.35);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(255, 107, 53, 0);
  }
}

main > section:nth-of-type(2) { animation-delay: 0.05s; }
main > section:nth-of-type(3) { animation-delay: 0.1s; }
main > section:nth-of-type(4) { animation-delay: 0.15s; }
main > section:nth-of-type(5) { animation-delay: 0.2s; }
main > section:nth-of-type(6) { animation-delay: 0.25s; }
main > section:nth-of-type(7) { animation-delay: 0.3s; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  header nav {
    gap: 0.6rem;
    padding: 0.6rem 1rem;
  }

  header nav ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.3rem;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  header nav ul::-webkit-scrollbar {
    height: 4px;
  }

  header nav ul::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-pill);
  }

  header nav ul li a {
    white-space: nowrap;
    font-size: 0.85rem;
    padding: 0.35rem 0.7rem;
  }

  main {
    padding: 1.2rem 0.9rem 2.4rem;
  }

  main > section {
    border-radius: var(--radius-md);
    margin-bottom: 1.3rem;
  }

  h2 {
    padding-left: 0.9rem;
  }

  h2::before {
    width: 5px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  header nav > a {
    font-size: 1.05rem;
  }

  main > section {
    padding: 1.2rem 1rem;
  }

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

  main article {
    padding: 1rem 1.1rem;
  }

  #faq h3 {
    font-size: 0.95rem;
    padding-left: 2.2rem;
  }

  footer {
    padding: 1.6rem 1rem;
  }

  footer p {
    font-size: 0.78rem;
  }
}

/* ============ ACCESSIBILITY / REDUCED MOTION ============ */
@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;
  }
}

/* ============ PRINT ============ */
@media print {
  header,
  footer,
  main > nav[aria-label="面包屑导航"] {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    background: #fff;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    animation: none;
  }

  h1 {
    -webkit-text-fill-color: #000;
    background: none;
  }
}