:root {
  --primary: #F9A826;
  --primary-dark: #E08800;
  --primary-light: #FFC85C;
  --secondary: #FF6B6B;
  --accent: #4ECDC4;
  --bg: #FFFBF5;
  --bg-alt: #FFF5E6;
  --card: #FFFFFF;
  --card-glass: rgba(255, 255, 255, 0.72);
  --text: #2D2A26;
  --text-soft: #6B6560;
  --text-muted: #9A938C;
  --border: rgba(249, 168, 38, 0.18);
  --shadow-sm: 0 2px 8px rgba(249, 168, 38, 0.08);
  --shadow-md: 0 8px 28px rgba(249, 168, 38, 0.14);
  --shadow-lg: 0 16px 48px rgba(249, 168, 38, 0.2);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --gradient-hero: linear-gradient(135deg, #FFF5E6 0%, #FFE0B2 35%, #FFC1A6 70%, #FFD9C2 100%);
  --gradient-primary: linear-gradient(135deg, #F9A826 0%, #FF6B6B 100%);
  --gradient-accent: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14110E;
    --bg-alt: #1E1A15;
    --card: #221D17;
    --card-glass: rgba(34, 29, 23, 0.72);
    --text: #F5EFE6;
    --text-soft: #C4B8AA;
    --text-muted: #8A7F73;
    --border: rgba(249, 168, 38, 0.22);
    --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 16px 48px rgba(0, 0, 0, 0.6);
    --gradient-hero: linear-gradient(135deg, #2A2118 0%, #3D2B1A 35%, #4A2E22 70%, #33241C 100%);
  }
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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(--secondary);
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: 3px;
  background: var(--gradient-primary);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin: 1.75rem 0 0.75rem;
  color: var(--primary-dark);
}

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

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

/* ========== 顶部导航 ========== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--card-glass);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
}

header nav > div {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

header nav > div > a:first-child {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  flex-shrink: 0;
}

header nav > div > a:first-child svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 4px 10px rgba(249, 168, 38, 0.35));
  transition: transform var(--transition);
}

header nav > div > a:first-child:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  flex: 1;
}

header nav ul li a {
  display: block;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-soft);
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

header nav ul li a:hover {
  background: var(--bg-alt);
  color: var(--primary-dark);
}

header nav form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

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

header nav form[role="search"] input {
  width: 200px;
  padding: 0.5rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), width var(--transition);
}

header nav form[role="search"] input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(249, 168, 38, 0.18);
  width: 240px;
}

header nav form[role="search"] button {
  padding: 0.5rem 1.1rem;
  border: none;
  border-radius: 999px;
  background: var(--gradient-primary);
  color: #fff;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition);
}

header nav form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

header nav button[aria-label="切换暗黑模式"] {
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--border);
  border-radius: 50%;
  background: var(--card);
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

header nav button[aria-label="切换暗黑模式"]:hover {
  transform: rotate(20deg) scale(1.1);
  background: var(--bg-alt);
  box-shadow: var(--shadow-sm);
}

/* ========== 主内容区 ========== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

main > section {
  margin-bottom: 3.5rem;
  padding: 2rem;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: box-shadow var(--transition), transform var(--transition);
  animation: fadeUp 0.7s ease both;
}

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

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

/* 面包屑 */
nav[aria-label="面包屑导航"] {
  margin: 1.25rem 0 1.5rem;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: "›";
  margin-right: 0.4rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-soft);
}

nav[aria-label="面包屑导航"] ol li a:hover {
  color: var(--primary-dark);
}

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

/* ========== 首屏 Banner ========== */
section[aria-labelledby="hero-title"] {
  background: var(--gradient-hero);
  border: none;
  padding: 3rem 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

section[aria-labelledby="hero-title"]::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 168, 38, 0.28), transparent 70%);
  pointer-events: none;
}

section[aria-labelledby="hero-title"]::after {
  content: "";
  position: absolute;
  bottom: -140px;
  left: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.22), transparent 70%);
  pointer-events: none;
}

section[aria-labelledby="hero-title"] > p {
  max-width: 760px;
  font-size: 1.02rem;
  color: var(--text-soft);
  position: relative;
  z-index: 1;
}

section[aria-labelledby="hero-title"] > div {
  margin: 2rem 0;
  position: relative;
  z-index: 1;
}

section[aria-labelledby="hero-title"] > div svg {
  width: 100%;
  max-width: 800px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition);
}

section[aria-labelledby="hero-title"] > div svg:hover {
  transform: scale(1.015);
}

section[aria-labelledby="hero-title"] > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  margin: 0.5rem 0.6rem 0.5rem 0;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

section[aria-labelledby="hero-title"] > a:first-of-type {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

section[aria-labelledby="hero-title"] > a:first-of-type:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: #fff;
}

section[aria-labelledby="hero-title"] > a:last-of-type {
  background: var(--card-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--primary-dark);
  border: 1.5px solid var(--border);
}

section[aria-labelledby="hero-title"] > a:last-of-type:hover {
  transform: translateY(-3px);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

/* ========== 列表样式 ========== */
main section ul:not([class]) {
  display: grid;
  gap: 0.6rem;
  margin: 1rem 0;
}

main section ul:not([class]) li {
  position: relative;
  padding: 0.65rem 1rem 0.65rem 2.4rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
  color: var(--text-soft);
  border-left: 3px solid var(--primary);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

main section ul:not([class]) li::before {
  content: "✦";
  position: absolute;
  left: 0.9rem;
  color: var(--primary);
  font-size: 0.85rem;
}

main section ul:not([class]) li:hover {
  transform: translateX(4px);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

main section ol {
  counter-reset: step;
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0;
}

main section ol li {
  counter-increment: step;
  position: relative;
  padding: 0.8rem 1rem 0.8rem 3.2rem;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
  color: var(--text-soft);
  transition: transform var(--transition), box-shadow var(--transition);
}

main section ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.8rem;
  height: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
}

main section ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ========== 新闻 & 文章卡片 ========== */
#news article,
#articles article {
  padding: 1.4rem 1.6rem;
  margin-bottom: 1rem;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

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

#news article h3,
#articles article h3 {
  margin-top: 0;
  font-size: 1.12rem;
}

#news article time,
#articles article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  padding: 0.15rem 0.6rem;
  background: var(--card);
  border-radius: 999px;
  border: 1px solid var(--border);
}

#articles article a {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--gradient-primary);
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition);
}

#articles article a:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
  color: #fff;
}

/* ========== 客户评价 ========== */
#testimonials blockquote {
  position: relative;
  padding: 1.5rem 1.6rem 1.5rem 3.2rem;
  margin-bottom: 1rem;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

#testimonials blockquote::before {
  content: "“";
  position: absolute;
  left: 1rem;
  top: 0.4rem;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.5;
  font-family: Georgia, serif;
}

#testimonials blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

#testimonials blockquote p {
  font-style: italic;
  color: var(--text);
  margin-bottom: 0.6rem;
}

#testimonials blockquote footer {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

#faq details:hover {
  border-color: var(--border);
}

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

#faq summary {
  padding: 1rem 1.3rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 3rem;
  transition: color var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.6rem;
  height: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  transition: transform var(--transition);
}

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

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

#faq details p {
  padding: 0 1.3rem 1.2rem;
  font-size: 0.92rem;
  animation: fadeUp 0.4s ease both;
}

/* ========== 联系我们链接 ========== */
#contact a {
  font-weight: 600;
  border-bottom: 1.5px dashed var(--primary);
}

#contact a:hover {
  border-bottom-style: solid;
}

/* ========== 网站地图 & 友情链接 ========== */
#sitemap ul,
#links ul {
  display: flex !important;
  flex-wrap: wrap;
  gap: 0.6rem !important;
}

#sitemap ul li,
#links ul li {
  padding: 0 !important;
  background: none !important;
  border: none !important;
}

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

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-soft);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-2px);
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* ========== 页脚 ========== */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem 2rem;
  margin-top: 2rem;
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

footer > section:last-of-type {
  border-bottom: none;
}

footer h2 {
  font-size: 1.05rem;
  padding-left: 0.8rem;
  margin-bottom: 0.9rem;
  background: none;
  -webkit-text-fill-color: var(--text);
  color: var(--text);
}

footer h2::before {
  width: 4px;
}

footer p {
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
}

footer ul li a {
  font-size: 0.88rem;
  color: var(--text-soft);
}

footer ul li a:hover {
  color: var(--primary-dark);
}

footer > p:last-of-type {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  text-align: center;
  color: var(--text-muted);
}

/* ========== 返回顶部 ========== */
a[aria-label="返回页面顶部"] {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.1;
  box-shadow: var(--shadow-md);
  z-index: 90;
  transition: transform var(--transition), box-shadow var(--transition);
}

a[aria-label="返回页面顶部"]:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

/* ========== 滚动动画增强 ========== */
@media (prefers-reduced-motion: no-preference) {
  main > section {
    animation: fadeUp 0.7s ease both;
  }

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  header nav > div {
    gap: 0.8rem;
  }

  header nav form[role="search"] input {
    width: 150px;
  }

  header nav form[role="search"] input:focus {
    width: 180px;
  }
}

@media (max-width: 860px) {
  header nav > div {
    flex-direction: column;
    align-items: stretch;
  }

  header nav > div > a:first-child {
    justify-content: center;
  }

  header nav ul {
    justify-content: center;
    order: 3;
    width: 100%;
  }

  header nav form[role="search"] {
    order: 2;
    justify-content: center;
  }

  header nav form[role="search"] input {
    flex: 1;
    width: auto;
    max-width: 320px;
  }

  header nav form[role="search"] input:focus {
    width: auto;
  }

  header nav button[aria-label="切换暗黑模式"] {
    position: absolute;
    top: 0.85rem;
    right: 1.2rem;
  }

  main {
    padding: 0 1rem 2rem;
  }

  main > section {
    padding: 1.5rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 2.5rem;
  }

  section[aria-labelledby="hero-title"] {
    padding: 2rem 1.5rem;
  }

  footer {
    padding: 2rem 1rem 1.5rem;
  }
}

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

  header nav {
    padding: 0.6rem 1rem;
  }

  header nav ul {
    gap: 0.1rem;
  }

  header nav ul li a {
    padding: 0.35rem 0.55rem;
    font-size: 0.82rem;
  }

  header nav form[role="search"] {
    flex-wrap: wrap;
  }

  header nav form[role="search"] input {
    max-width: 100%;
  }

  main > section {
    padding: 1.25rem 1rem;
  }

  section[aria-labelledby="hero-title"] {
    padding: 1.75rem 1rem;
  }

  section[aria-labelledby="hero-title"] > a {
    display: flex;
    width: 100%;
    margin: 0.5rem 0;
  }

  main section ul:not([class]) li {
    padding: 0.6rem 0.8rem 0.6rem 2.1rem;
    font-size: 0.9rem;
  }

  main section ol li {
    padding: 0.7rem 0.8rem 0.7rem 2.8rem;
    font-size: 0.9rem;
  }

  #news article,
  #articles article {
    padding: 1.1rem 1.1rem;
  }

  #testimonials blockquote {
    padding: 1.2rem 1.1rem 1.2rem 2.6rem;
  }

  #faq summary {
    padding: 0.85rem 2.8rem 0.85rem 1rem;
    font-size: 0.9rem;
  }

  a[aria-label="返回页面顶部"] {
    width: 42px;
    height: 42px;
    right: 1rem;
    bottom: 1rem;
    font-size: 0.7rem;
  }
}

/* ========== 无障碍 & 焦点 ========== */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: rgba(249, 168, 38, 0.28);
  color: var(--text);
}

/* ========== 打印 ========== */
@media print {
  header,
  footer,
  a[aria-label="返回页面顶部"],
  header nav form[role="search"],
  header nav button {
    display: none !important;
  }

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

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