:root {
  --cream: #FDF8F0;
  --beige: #F5EBE0;
  --terracotta: #D96C47;
  --olive: #4A6B5D;
  --ochre: #D4A24E;
  --ink: #2D2A26;
  --muted: #8B7D6F;
  --white: #FFFFFF;
}

/* 基础重置 */
*, *::before, *::after { 
  margin: 0; 
  padding: 0; 
  box-sizing: border-box; 
}

html {
  scroll-behavior: smooth;
}

body { 
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
  overflow-x: hidden; 
  background: var(--cream);
  color: var(--ink);
  line-height: 1.75;
  background-image:
    linear-gradient(90deg, rgba(217,108,71,0.03) 1px, transparent 1px),
    linear-gradient(rgba(217,108,71,0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

::selection {
  background: var(--terracotta);
  color: var(--white);
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { 
  background: var(--terracotta); 
  border-radius: 20px; 
  border: 2px solid var(--cream);
}

h1, h2, h3, .section-title, .logo {
  font-family: 'Songti SC', 'STSong', 'Georgia', serif;
}

a { color: var(--ink); }

img { display: block; max-width: 100%; }

/* 核心布局 */
.container { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

.section { 
  padding: 96px 0; 
  position: relative;
}

.section:nth-child(even) { 
  background: var(--beige); 
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* 导航 */
.site-header { 
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  z-index: 1000; 
  background: rgba(253,248,240,0.92); 
  backdrop-filter: blur(12px); 
  border-bottom: 1px solid rgba(217,108,71,0.15); 
}

.header-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 72px; 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

.logo { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  font-weight: 700; 
  font-size: 1.35rem; 
  text-decoration: none; 
  color: var(--ink); 
  letter-spacing: 0.01em;
}

.logo-icon { 
  width: 36px; 
  height: 36px; 
  border-radius: 50% 50% 50% 4px; 
  background: var(--terracotta); 
  color: var(--white);
  display: flex; 
  align-items: center; 
  justify-content: center; 
  font-size: 0.95rem; 
  transform: rotate(-8deg);
  box-shadow: 0 3px 8px rgba(217,108,71,0.3);
  font-style: italic;
}

.main-nav { 
  display: flex; 
  align-items: center; 
  gap: 28px; 
  list-style: none; 
}

.main-nav a { 
  text-decoration: none; 
  font-size: 0.92rem; 
  font-weight: 500; 
  color: var(--ink);
  position: relative;
  padding: 6px 0;
  transition: 0.2s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--terracotta);
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--terracotta);
}

.main-nav a:hover::after { width: 100%; }

.nav-cta { 
  background: var(--terracotta); 
  padding: 9px 24px; 
  border-radius: 50px; 
  color: var(--white) !important; 
  font-weight: 600; 
  box-shadow: 0 3px 12px rgba(217,108,71,0.25);
  transition: all 0.25s ease;
}

.nav-cta:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217,108,71,0.35);
  color: var(--white) !important;
}

.nav-cta::after { display: none; }

.menu-toggle { 
  display: none; 
  width: 42px; 
  height: 42px;
  align-items: center;
  justify-content: center;
  background: var(--beige);
  color: var(--ink);
  border: none;
  border-radius: 12px;
  font-size: 1.4rem;
  cursor: pointer;
  transition: 0.2s;
}

.menu-toggle:hover { background: var(--terracotta); color: var(--white); }

/* Hero */
.hero { 
  min-height: 76vh; 
  display: flex; 
  align-items: center; 
  position: relative;
  background: linear-gradient(125deg, var(--cream) 0%, var(--beige) 100%);
  overflow: hidden;
  padding-top: 140px;
  padding-bottom: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  right: -140px;
  top: -100px;
  width: 400px;
  height: 400px;
  border-radius: 48% 52% 38% 62% / 56% 40% 60% 44%;
  background: var(--terracotta);
  opacity: 0.08;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  left: -60px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 3px solid var(--ochre);
  opacity: 0.25;
  pointer-events: none;
}

.hero-content { 
  max-width: 720px; 
  position: relative;
  z-index: 2;
}

.hero-eyebrow { 
  display: inline-block; 
  font-size: 0.85rem; 
  font-weight: 600; 
  padding: 6px 18px; 
  border-radius: 50px; 
  background: rgba(74,107,93,0.12);
  color: var(--olive);
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero h1 { 
  font-size: clamp(2.6rem, 5.5vw, 4.4rem); 
  line-height: 1.15; 
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px; 
  color: var(--ink);
}

.hero p { 
  font-size: 1.1rem; 
  line-height: 1.8;
  opacity: 0.65; 
  max-width: 560px; 
  margin-bottom: 32px; 
}

.hero-buttons { 
  display: flex; 
  gap: 14px; 
}

.hero-image { 
  border-radius: 4px 32px 4px 32px; 
  overflow: hidden; 
}

.hero-image img { 
  width: 100%; 
  height: auto; 
}

/* 按钮 */
.btn { 
  display: inline-flex; 
  align-items: center; 
  gap: 8px; 
  padding: 14px 32px; 
  border-radius: 50px 50px 50px 6px; 
  font-weight: 600; 
  cursor: pointer; 
  border: none; 
  text-decoration: none; 
  font-size: 0.95rem;
  transition: 0.25s ease; 
}

.btn-primary { 
  background: var(--terracotta); 
  color: var(--white);
  box-shadow: 0 4px 14px rgba(217,108,71,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #c85a37;
  box-shadow: 0 8px 24px rgba(217,108,71,0.4);
}

.btn-outline { 
  background: transparent; 
  border: 2px solid var(--olive);
  color: var(--olive);
}

.btn-outline:hover {
  background: var(--olive);
  color: var(--white);
  transform: translateY(-2px);
}

/* 标签/标题 */
.section-label { 
  display: inline-block; 
  font-size: 0.82rem; 
  font-weight: 700; 
  letter-spacing: 3px; 
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 12px; 
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--ochre);
  border-radius: 2px;
  transform: rotate(45deg);
  margin-right: 10px;
  vertical-align: baseline;
}

.section-title { 
  font-size: clamp(2rem, 4vw, 3rem); 
  margin-bottom: 14px; 
  font-weight: 700;
}

.section-desc { 
  max-width: 600px; 
  opacity: 0.7; 
  margin-bottom: 44px; 
  line-height: 1.8;
}

/* 卡片网格 */
.cards-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); 
  gap: 28px; 
}

.category-card { 
  background: var(--white);
  border-radius: 4px 24px 4px 24px; 
  padding: 32px; 
  border: none;
  border-left: 4px solid var(--terracotta);
  box-shadow: 5px 5px 0 rgba(217,108,71,0.1);
  transition: all 0.3s ease; 
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(212,162,78,0.1);
  transition: transform 0.4s ease;
}

.category-card:hover { 
  transform: translate(-3px, -3px); 
  box-shadow: 9px 9px 0 rgba(217,108,71,0.18);
  border-left-color: var(--ochre);
}

.category-card:hover::before {
  transform: scale(1.6);
}

.card-icon { 
  width: 52px; 
  height: 52px; 
  border-radius: 14px 14px 14px 4px; 
  background: var(--beige);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px; 
  font-size: 1.4rem;
  color: var(--terracotta);
  border: 1px solid rgba(217,108,71,0.15);
}

.card-link { 
  font-weight: 600; 
  font-size: 0.86rem; 
  text-decoration: none;
  color: var(--olive);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 0.2s;
}

.card-link:hover { color: var(--terracotta); gap: 10px; }

/* 特性块 */
.feature-block { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 64px; 
  align-items: center; 
}

.feature-image { 
  border-radius: 4px 40px 4px 40px; 
  padding: 16px;
  background: var(--white);
  border: 1px solid rgba(217,108,71,0.12);
  box-shadow: 8px 8px 0 rgba(74,107,93,0.12);
  position: relative;
  overflow: visible;
}

.feature-image::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 2px dashed rgba(217,108,71,0.3);
  border-radius: 4px 32px 4px 32px;
  pointer-events: none;
  z-index: 2;
}

.feature-image img { 
  width: 100%; 
  height: auto; 
  border-radius: 2px 30px 2px 30px;
  filter: sepia(0.12) saturate(1.05);
  position: relative;
  z-index: 1;
}

.feature-text { 
  padding: 0 8px;
}

.feature-list { 
  list-style: none; 
  margin-top: 20px;
}

.feature-list li { 
  padding: 8px 0; 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  font-size: 0.98rem;
  border-bottom: 1px dashed rgba(74,107,93,0.15);
}

.feature-list li::before { 
  content: '✓'; 
  font-weight: 700;
  color: var(--terracotta);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(74,107,93,0.08);
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* 数据条 */
.stats-bar { 
  display: grid; 
  grid-template-columns: repeat(4,1fr); 
  gap: 24px; 
  text-align: center; 
}

.stat-item { 
  background: var(--white);
  padding: 36px 16px; 
  border-radius: 4px 24px 4px 24px;
  border: none;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(45,42,38,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--terracotta), var(--ochre), var(--olive));
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(45,42,38,0.1);
}

.stat-number { 
  font-size: clamp(2.4rem, 4vw, 3.2rem); 
  font-weight: 800;
  color: var(--ink);
  line-height: 1.2;
  font-family: 'Songti SC', 'STSong', Georgia, serif;
}

.stat-label { 
  font-size: 0.9rem; 
  opacity: 0.6; 
  margin-top: 6px; 
  color: var(--muted);
  letter-spacing: 1px;
}

/* 内容墙 */
.content-wall { 
  display: grid; 
  grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); 
  gap: 28px; 
}

.content-wall-item { 
  border-radius: 4px 20px 4px 20px; 
  overflow: hidden; 
  border: none;
  background: var(--white);
  box-shadow: 0 2px 12px rgba(45,42,38,0.06);
  transition: 0.3s ease;
}

.content-wall-item:hover { 
  transform: translateY(-4px) rotate(-0.4deg); 
  box-shadow: 0 10px 30px rgba(45,42,38,0.1);
}

.content-wall-item img { 
  width: 100%; 
  height: 200px; 
  object-fit: cover;
  filter: sepia(0.1) saturate(1.05);
  transition: transform 0.4s ease;
}

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body { 
  padding: 24px 24px 28px;
}

.content-wall-body h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.65;
  line-height: 1.7;
}

/* FAQ */
.faq-list { 
  max-width: 800px; 
  margin: 0 auto; 
}

.faq-item { 
  background: var(--white);
  border: none;
  border-radius: 4px 16px 4px 16px;
  margin-bottom: 12px; 
  overflow: hidden; 
  cursor: pointer;
  box-shadow: 0 1px 6px rgba(45,42,38,0.04);
  transition: box-shadow 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 4px 16px rgba(217,108,71,0.1);
}

.faq-item .faq-question {
  padding: 20px 24px; 
  font-weight: 600; 
  display: flex; 
  justify-content: space-between;
  align-items: center;
  font-size: 1.02rem;
  color: var(--ink);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  color: var(--terracotta);
  transition: transform 0.3s ease;
  line-height: 1;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer { 
  max-height: 0;
  padding: 0 24px;
  display: block;
  overflow: hidden;
  opacity: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  transition: max-height 0.35s ease, padding 0.35s ease, opacity 0.3s ease;
}

.faq-item.open .faq-answer { 
  max-height: 400px;
  padding: 0 24px 20px;
  opacity: 0.7;
}

/* CTA横幅 */
.cta-banner { 
  background: linear-gradient(135deg, var(--terracotta) 0%, #e8855f 100%);
  padding: 64px 40px; 
  text-align: center; 
  border-radius: 4px 40px 4px 40px; 
  color: var(--white);
  box-shadow: 8px 8px 0 rgba(217,108,71,0.18);
}

.cta-banner h2 { 
  color: var(--white);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 14px;
  font-weight: 700;
}

.cta-banner p {
  font-size: 1rem;
  opacity: 0.85;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn-primary { 
  background: var(--white);
  color: var(--terracotta);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* 页脚 */
.site-footer { 
  background: var(--beige);
  padding: 72px 0 28px; 
  border-top: 3px solid var(--olive);
  color: var(--ink);
}

.site-footer .container { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px;
}

.footer-grid { 
  display: grid; 
  grid-template-columns: 2fr 1fr 1fr 1fr; 
  gap: 48px; 
}

.footer-brand { 
  color: var(--ink);
}

.footer-brand .logo {
  font-size: 1.5rem;
  margin-bottom: 14px;
  color: var(--ink);
}

.footer-brand p {
  font-size: 0.95rem;
  opacity: 0.65;
  max-width: 280px;
  line-height: 1.8;
}

.footer-col { 
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--olive);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.footer-col a {
  text-decoration: none;
  font-size: 0.92rem;
  opacity: 0.7;
  transition: 0.2s;
  color: var(--ink);
}

.footer-col a:hover {
  opacity: 1;
  color: var(--terracotta);
  padding-left: 4px;
}

.footer-bottom { 
  border-top: 1px solid rgba(74,107,93,0.2); 
  margin-top: 48px; 
  padding-top: 24px; 
  text-align: center; 
  font-size: 0.85rem;
  opacity: 0.6;
}

/* 工具类 */
.text-accent { 
  color: var(--terracotta);
  font-style: italic;
}

.text-center { text-align: center; }

.seo-description { 
  max-width: 600px; 
  margin: 0 auto 48px; 
  opacity: 0.7; 
  text-align: center;
  line-height: 1.8;
}

.mt-0 { margin-top: 0; }

.mb-0 { margin-bottom: 0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; gap: 48px; }
  .stats-bar { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  
  .menu-toggle { 
    display: flex; 
    font-size: 1.6rem;
  }
  
  .main-nav { 
    display: none; 
    flex-direction: column; 
    position: absolute; 
    top: 72px; 
    left: 0; 
    width: 100%; 
    background: rgba(253,248,240,0.98); 
    padding: 28px 24px;
    border-bottom: 1px solid rgba(217,108,71,0.15);
    box-shadow: 0 20px 40px rgba(45,42,38,0.08);
    gap: 20px;
    align-items: flex-start;
  }
  
  .main-nav.open { 
    display: flex; 
  }
  
  .main-nav a::after {
    height: 1.5px;
  }
  
  .hero {
    padding-top: 160px;
    padding-bottom: 60px;
  }
  
  .hero-content {
    text-align: center;
    margin: 0 auto;
  }
  
  .hero p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image {
    margin-top: 48px;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; }
  
  .hero-buttons { flex-direction: column; align-items: stretch; }
  
  .hero-buttons .btn {
    justify-content: center;
  }
  
  .section { padding: 72px 0; }
  
  .stats-bar { gap: 16px; }
  
  .stat-item { padding: 28px 12px; }
  
  .cta-banner { padding: 48px 24px; }
  
  .hero h1 { font-size: 2.4rem; }
}