:root {
  --orange: #ff6b35;
  --orange-light: #ff8f66;
  --orange-dark: #e04e1a;
  --orange-glow: rgba(255, 107, 53, 0.35);
  --bg: #fff8f4;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text: #241a14;
  --text-soft: #5c4a3f;
  --text-muted: #8a7466;
  --border: rgba(255, 107, 53, 0.18);
  --border-soft: rgba(36, 26, 20, 0.08);
  --shadow-sm: 0 2px 8px rgba(224, 78, 26, 0.08);
  --shadow-md: 0 8px 28px rgba(224, 78, 26, 0.12);
  --shadow-lg: 0 18px 48px rgba(224, 78, 26, 0.16);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --transition: 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  --maxw: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14100e;
    --bg-alt: #1c1714;
    --bg-card: rgba(40, 32, 28, 0.72);
    --bg-glass: rgba(48, 38, 33, 0.5);
    --text: #f5ece6;
    --text-soft: #d4c4b9;
    --text-muted: #9c8a7e;
    --border: rgba(255, 107, 53, 0.28);
    --border-soft: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px 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);
  }
}

*,
*::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: 1.78;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 107, 53, 0.1), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(255, 143, 102, 0.1), transparent 40%),
    radial-gradient(circle at 50% 92%, rgba(255, 107, 53, 0.06), transparent 46%);
  background-attachment: fixed;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover,
a:focus-visible {
  color: var(--orange);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text);
}

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

h2 {
  font-size: clamp(1.4rem, 3vw, 2.05rem);
  position: relative;
  padding-left: 0.72em;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.16em;
  bottom: 0.16em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--orange), var(--orange-light));
  box-shadow: 0 0 14px var(--orange-glow);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text);
}

p {
  margin: 0 0 1em;
  color: var(--text-soft);
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
  color: var(--text-soft);
}

li {
  margin-bottom: 0.45em;
}

li::marker {
  color: var(--orange);
}

time {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

blockquote {
  margin: 0 0 1.2em;
  padding: 1em 1.3em;
  background: var(--bg-glass);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

blockquote p {
  margin: 0;
  color: var(--text-soft);
}

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

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

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

header nav > a {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

header nav > a::before {
  content: "🍊";
  font-size: 1.25rem;
  filter: drop-shadow(0 2px 6px var(--orange-glow));
  transition: transform var(--transition);
}

header nav > a:hover::before {
  transform: rotate(-14deg) scale(1.12);
}

header nav > a:hover {
  color: var(--orange);
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
  margin-left: auto;
}

header nav ul li {
  margin: 0;
}

header nav ul a {
  display: inline-block;
  padding: 0.42em 0.85em;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-soft);
  border-radius: var(--radius-pill);
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

header nav ul a:hover,
header nav ul a:focus-visible {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-light));
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--orange-glow);
}

/* ============ Main layout ============ */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.2rem 3rem;
}

main > nav[aria-label="面包屑导航"] {
  padding: 1rem 0 0.2rem;
  font-size: 0.86rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-muted);
}

main > nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 0.35rem;
  color: var(--orange);
  font-weight: 700;
}

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

main > nav[aria-label="面包屑导航"] a:hover {
  color: var(--orange);
}

main > nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--orange-dark);
  font-weight: 700;
}

/* ============ Sections ============ */
section {
  margin: 2.4rem 0;
  padding: 1.8rem 1.6rem;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

section:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

section > h2:first-child {
  margin-top: 0;
}

section > h3 {
  margin-top: 1.6em;
  padding-bottom: 0.35em;
  border-bottom: 1px dashed var(--border);
}

section > h3:first-of-type {
  margin-top: 0.6em;
}

/* ============ Hero ============ */
#hero {
  position: relative;
  margin-top: 1.4rem;
  padding: 3rem 2rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.92) 0%, rgba(255, 143, 102, 0.82) 48%, rgba(255, 180, 120, 0.78) 100%);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite, fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.28);
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.4), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(255, 255, 255, 0.22), transparent 46%);
  pointer-events: none;
}

#hero::after {
  content: "🍊";
  position: absolute;
  right: -1.4rem;
  bottom: -1.8rem;
  font-size: 11rem;
  line-height: 1;
  opacity: 0.16;
  transform: rotate(-12deg);
  pointer-events: none;
  filter: blur(1px);
}

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

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(180, 60, 10, 0.35);
  margin-bottom: 0.7em;
}

#hero p {
  color: rgba(255, 255, 255, 0.94);
  max-width: 74ch;
  text-shadow: 0 1px 6px rgba(180, 60, 10, 0.22);
}

#hero p:last-child {
  margin-bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  font-weight: 600;
}

#hero a {
  display: inline-block;
  padding: 0.6em 1.35em;
  color: var(--orange-dark);
  font-weight: 700;
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-pill);
  box-shadow: 0 6px 20px rgba(180, 60, 10, 0.22);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

#hero a:hover,
#hero a:focus-visible {
  transform: translateY(-3px) scale(1.03);
  background: #fff;
  color: var(--orange);
  box-shadow: 0 12px 30px rgba(180, 60, 10, 0.32);
}

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

#products ul li {
  position: relative;
  margin: 0;
  padding: 1rem 1.1rem 1rem 2.6rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-soft);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#products ul li::before {
  content: "✓";
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.3rem;
  height: 1.3rem;
  font-size: 0.78rem;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-light));
  border-radius: 50%;
  box-shadow: 0 3px 10px var(--orange-glow);
}

#products ul li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

/* ============ News & Articles cards ============ */
#news,
#articles {
  display: block;
}

#news article,
#articles article {
  position: relative;
  margin: 0 0 1.1rem;
  padding: 1.25rem 1.4rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

#news article::after,
#articles article::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--orange), var(--orange-light));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

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

#news article:hover::after,
#articles article:hover::after {
  transform: scaleY(1);
}

#news article h3,
#articles article h3 {
  margin: 0 0 0.35em;
  font-size: 1.08rem;
  transition: color var(--transition);
}

#news article:hover h3,
#articles article:hover h3 {
  color: var(--orange-dark);
}

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

#articles article p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.35em 0.95em;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.1);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

#articles article p:last-child a:hover {
  background: linear-gradient(135deg, var(--orange), var(--orange-light));
  color: #fff;
  transform: translateX(3px);
}

#articles article p:last-child a:hover::after {
  transform: translateX(3px);
}

/* ============ FAQ ============ */
#faq details {
  margin-bottom: 0.7rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

#faq details[open] {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--bg-card);
}

#faq summary {
  position: relative;
  padding: 1em 3em 1em 1.2em;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition), background var(--transition);
}

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

#faq summary::after {
  content: "";
  position: absolute;
  right: 1.2rem;
  top: 50%;
  width: 0.6em;
  height: 0.6em;
  border-right: 2.5px solid var(--orange);
  border-bottom: 2.5px solid var(--orange);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition);
}

#faq details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

#faq summary:hover {
  color: var(--orange-dark);
  background: rgba(255, 107, 53, 0.06);
}

#faq details p {
  margin: 0;
  padding: 0 1.2rem 1.1rem;
  color: var(--text-soft);
  font-size: 0.94rem;
  animation: fadeUp 0.35s ease both;
}

/* ============ HowTo ============ */
#howto ol {
  counter-reset: howto;
  list-style: none;
  padding: 0;
  margin: 1.2rem 0;
}

#howto ol li {
  counter-increment: howto;
  position: relative;
  margin: 0 0 0.8rem;
  padding: 1rem 1.2rem 1rem 3.4rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  color: var(--text-soft);
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  font-size: 0.9rem;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-light));
  border-radius: 50%;
  box-shadow: 0 4px 12px var(--orange-glow);
}

#howto ol li:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border);
}

/* ============ Contact ============ */
#contact ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.8rem;
  margin: 1.2rem 0;
}

#contact ul li {
  position: relative;
  margin: 0;
  padding: 0.9rem 1.1rem 0.9rem 2.6rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  font-size: 0.94rem;
  color: var(--text-soft);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact ul li::before {
  content: "◈";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--orange);
  font-size: 1rem;
  font-weight: 700;
}

#contact ul li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

/* ============ Sitemap & Links ============ */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 0.5em 1.1em;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-soft);
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-3px);
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-light));
  border-color: transparent;
  box-shadow: 0 8px 20px var(--orange-glow);
}

/* ============ Footer ============ */
footer {
  margin-top: 2rem;
  padding: 2.4rem 1.2rem 1.6rem;
  background: linear-gradient(180deg, transparent, rgba(255, 107, 53, 0.06));
  border-top: 1px solid var(--border-soft);
}

footer > section {
  max-width: var(--maxw);
  margin: 0 auto 1.6rem;
  padding: 1.4rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

footer h2 {
  font-size: 1.15rem;
  margin-bottom: 0.7em;
}

footer h3 {
  font-size: 1rem;
  margin: 1em 0 0.4em;
  color: var(--orange-dark);
}

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

footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

footer > p {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============ Animations ============ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@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 (max-width: 900px) {
  header nav {
    gap: 0.6rem;
  }

  header nav ul {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    gap: 0.15rem;
  }

  header nav ul a {
    font-size: 0.86rem;
    padding: 0.38em 0.7em;
  }

  section {
    padding: 1.4rem 1.15rem;
    margin: 1.8rem 0;
    border-radius: var(--radius-md);
  }

  #hero {
    padding: 2.2rem 1.3rem;
    border-radius: var(--radius-md);
  }

  #hero::after {
    font-size: 7rem;
    right: -1rem;
    bottom: -1.2rem;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
    line-height: 1.72;
  }

  main {
    padding: 0 0.85rem 2rem;
  }

  header nav {
    padding: 0.6rem 0.85rem;
  }

  header nav > a {
    font-size: 1.02rem;
  }

  header nav ul {
    gap: 0.1rem;
  }

  header nav ul a {
    font-size: 0.8rem;
    padding: 0.34em 0.6em;
  }

  section {
    padding: 1.2rem 1rem;
    margin: 1.4rem 0;
    border-radius: var(--radius-sm);
  }

  h2 {
    padding-left: 0.65em;
  }

  h2::before {
    width: 4px;
  }

  #hero {
    padding: 1.7rem 1.05rem;
    margin-top: 1rem;
  }

  #hero::after {
    font-size: 5rem;
  }

  #hero p:last-child {
    gap: 0.5rem 0.7rem;
  }

  #hero a {
    padding: 0.5em 1.05em;
    font-size: 0.88rem;
  }

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

  #news article,
  #articles article {
    padding: 1rem 1.05rem;
  }

  #faq summary {
    padding: 0.9em 2.6em 0.9em 1em;
    font-size: 0.93rem;
  }

  #howto ol li {
    padding: 0.9rem 1rem 0.9rem 3rem;
  }

  footer {
    padding: 1.6rem 0.85rem 1.2rem;
  }

  footer > section {
    padding: 1.1rem 1rem;
  }
}

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

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

  section {
    box-shadow: none;
    border: 1px solid #ddd;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    animation: none;
  }

  #hero {
    background: #f5f5f5;
    box-shadow: none;
  }

  #hero h1,
  #hero p {
    color: #000;
    text-shadow: none;
  }
}