```css
:root {
  --c-bg: #FAF4EB;
  --c-bg-soft: #F3EDE4;
  --c-card: #FFFDF9;
  --c-primary: #E85D4A;
  --c-secondary: #F2B84B;
  --c-accent: #6B9D8E;
  --c-text: #2D2A26;
  --c-text-light: rgba(45, 42, 38, 0.65);
  --c-border: rgba(45, 42, 38, 0.08);
  --shadow-sm: 0 2px 12px rgba(45, 42, 38, 0.05);
  --shadow-md: 0 8px 25px rgba(232, 93, 74, 0.14);
  --shadow-lg: 0 24px 48px rgba(232, 93, 74, 0.2);
  --radius: 16px;
  --radius-lg: 24px;
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--c-bg);
  background-image:
    radial-gradient(circle at 85% 15%, rgba(242, 184, 75, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 15% 85%, rgba(232, 93, 74, 0.07) 0%, transparent 40%);
  color: var(--c-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.section {
  padding: 90px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--c-bg-soft);
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 252, 248, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(232, 93, 74, 0.12);
  transition: box-shadow 0.3s ease;
}

.site-header:hover {
  box-shadow: 0 4px 20px rgba(45, 42, 38, 0.04);
}

.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: 900;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--c-text);
  letter-spacing: -0.5px;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(232, 93, 74, 0.25);
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text);
  position: relative;
  padding: 4px 2px;
  transition: color 0.25s;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.main-nav a:not(.nav-cta):hover {
  color: var(--c-primary);
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 9px 22px;
  border-radius: 24px;
  color: #fff !important;
  font-weight: 600;
  background: var(--c-primary);
  box-shadow: 0 4px 14px rgba(232, 93, 74, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.nav-cta:hover {
  background: #d94a3a;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(232, 93, 74, 0.35);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-border);
  background: var(--c-card);
  border-radius: 14px;
  cursor: pointer;
  position: relative;
  transition: all 0.3s;
  flex-shrink: 0;
}

.menu-toggle:hover {
  border-color: rgba(232, 93, 74, 0.3);
  box-shadow: var(--shadow-sm);
}

.menu-toggle::before,
.menu-toggle::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 6px 0 var(--c-text), 0 -6px 0 var(--c-text);
  transition: background 0.2s;
}

/* ===== 首页 Hero ===== */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  gap: 48px;
  padding: 130px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 15%;
  right: -80px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(242, 184, 75, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 5%;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(107, 157, 142, 0.14) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  flex: 1.2;
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 30px;
  margin-bottom: 20px;
  background: rgba(242, 184, 75, 0.22);
  border: 1px solid rgba(242, 184, 75, 0.35);
  color: #A07600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 22px;
  color: var(--c-text);
}

.hero h1 .text-accent {
  background: linear-gradient(120deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--c-text-light);
  max-width: 540px;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  position: relative;
  z-index: 2;
}

.hero-image {
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  position: relative;
  transition: transform 0.4s ease;
}

.hero-image:hover {
  transform: scale(1.015);
}

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(232, 93, 74, 0.15) 0%, transparent 45%);
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(232, 93, 74, 0.28);
}

.btn-primary:hover {
  background: #d94a3a;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(232, 93, 74, 0.35);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--c-text);
  color: var(--c-text);
}

.btn-outline:hover {
  background: var(--c-text);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 章节标签 / 标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  padding: 6px 16px;
  background: var(--c-secondary);
  color: var(--c-text);
  border-radius: 30px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.8px;
  line-height: 1.25;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 2px;
  width: 48px;
  height: 3px;
  background: var(--c-primary);
  border-radius: 4px;
}

.section-desc {
  max-width: 620px;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--c-text-light);
  margin-bottom: 44px;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  background: var(--c-card);
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  opacity: 0;
  transition: opacity 0.4s;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 93, 74, 0.15);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: rgba(232, 93, 74, 0.12);
  color: var(--c-primary);
  transition: transform 0.3s;
}

.category-card:hover .card-icon {
  transform: scale(1.08) rotate(-3deg);
}

.category-card:nth-child(2n) .card-icon {
  background: rgba(242, 184, 75, 0.18);
  color: #A07600;
}

.category-card:nth-child(3n) .card-icon {
  background: rgba(107, 157, 142, 0.16);
  color: var(--c-accent);
}

.card-link {
  display: inline-block;
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--c-primary);
  margin-top: 12px;
  transition: gap 0.3s;
}

.card-link:hover {
  gap: 6px;
}

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  max-height: 420px;
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(242, 184, 75, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-text {
  padding: 0;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--c-accent);
  background: rgba(107, 157, 142, 0.18);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  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 {
  padding: 32px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  background: var(--c-card);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--c-text-light);
  margin-top: 8px;
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background: var(--c-card);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 93, 74, 0.15);
}

.content-wall-item .img-wrap {
  overflow: hidden;
  position: relative;
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.06);
}

.content-wall-body {
  padding: 22px;
}

.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--c-text-light);
  line-height: 1.6;
}

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

.faq-item {
  border: 1px solid var(--c-border);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--c-card);
  cursor: pointer;
  transition: all 0.35s ease;
}

.faq-item:hover {
  border-color: rgba(232, 93, 74, 0.15);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 93, 74, 0.2);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-item .faq-question::after {
  content: '+';
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(232, 93, 74, 0.12);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  transition: all 0.35s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
  background: var(--c-primary);
  color: #fff;
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--c-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  animation: faqSlideIn 0.3s ease;
}

@keyframes faqSlideIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== CTA 横幅 ===== */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--c-primary) 0%, #F0785A 50%, var(--c-secondary) 100%);
  box-shadow: 0 20px 50px rgba(232, 93, 74, 0.25);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before,
.cta-banner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.cta-banner::before {
  width: 140px;
  height: 140px;
  top: -50px;
  left: -30px;
}

.cta-banner::after {
  width: 200px;
  height: 200px;
  bottom: -70px;
  right: -50px;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 1rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--c-primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--c-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.15);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #F0E8DE;
  padding: 64px 0 30px;
  border-top: 1px solid rgba(45, 42, 38, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand .logo {
  font-size: 1.4rem;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--c-text-light);
  max-width: 280px;
  line-height: 1.7;
}

.footer-col h4,
.footer-col .col-title {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  color: var(--c-text);
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--c-text);
  opacity: 0.65;
  text-decoration: none;
  padding: 4px 0;
  transition: all 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(45, 42, 38, 0.1);
  margin-top: 48px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--c-text-light);
}

/* ===== 工具类 ===== */
.text-accent {
  color: var(--c-primary);
}

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

.seo-description {
  max-width: 640px;
  margin: 0 auto 48px;
  color: var(--c-text-light);
  font-size: 0.98rem;
  line-height: 1.9;
  text-align: center;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 252, 248, 0.97);
    padding: 28px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--c-border);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 20px 40px rgba(45, 42, 38, 0.06);
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 6px 0;
  }

  .main-nav.open .nav-cta {
    text-align: center;
    padding: 12px 20px;
  }

  .hero {
    flex-direction: column;
    padding-top: 110px;
    gap: 28px;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    width: 100%;
    max-width: 480px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 60px 0;
  }

  .hero {
    min-height: auto;
    padding-top: 100px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .feature-list li {
    font-size: 0.9rem;
  }
}