:root {
  --paper: #faf7f2;
  --paper-dark: #f0ebe3;
  --paper-deep: #e9e2d8;
  --ink: #3d3a38;
  --ink-light: rgba(61,58,56,0.72);
  --ink-lighter: rgba(61,58,56,0.4);
  --line: rgba(61,58,56,0.09);
  --sage: #7a9b76;
  --sage-light: #c8dac5;
  --sage-dark: #4d6b4a;
  --terra: #e07a5f;
  --terra-light: #f4c5b5;
  --terra-soft: rgba(224,122,95,0.12);
  --cream: #f7ece0;
  --white: #ffffff;
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 26px;
  --shadow-sm: 0 2px 14px rgba(61,58,56,0.05);
  --shadow-md: 0 8px 36px rgba(61,58,56,0.09);
  --shadow-lg: 0 24px 64px rgba(61,58,56,0.13);
  --ease: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ===== 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: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.section {
  padding: 80px 0;
  position: relative;
}

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

/* ===== 导航栏 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 247, 242, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--line);
  transition: var(--ease);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: linear-gradient(145deg, var(--sage), var(--sage-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(122, 155, 118, 0.3);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-light);
  transition: var(--ease);
  position: relative;
  letter-spacing: 0.02em;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--sage);
  transition: var(--ease);
}

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

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

.nav-cta {
  padding: 8px 24px;
  border-radius: 40px;
  color: #fff !important;
  font-weight: 600;
  background: var(--terra);
  box-shadow: 0 4px 18px rgba(224, 122, 95, 0.28);
  transition: var(--ease);
  letter-spacing: 0.02em;
}

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

.nav-cta:hover {
  background: var(--terra);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(224, 122, 95, 0.4);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: transparent;
  color: var(--ink);
  font-size: 1.3rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--ease);
}

.menu-toggle:hover {
  background: var(--paper-dark);
  border-color: var(--sage);
}

/* ===== Hero 区域 ===== */
.hero {
  min-height: 72vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  padding: 120px 0 80px;
  position: relative;
  background: linear-gradient(175deg, #fdfbf8 0%, var(--paper) 55%, var(--paper-dark) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -100px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(122, 155, 118, 0.18) 0%, transparent 68%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  pointer-events: none;
}

.hero-content {
  max-width: 650px;
  position: relative;
  z-index: 2;
  flex: 0 1 650px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 7px 20px;
  border-radius: 40px;
  margin-bottom: 24px;
  background: var(--terra-soft);
  color: var(--terra);
  border: 1px solid rgba(224, 122, 95, 0.15);
  gap: 8px;
}

.hero-eyebrow::before {
  content: '●';
  font-size: 0.4em;
  opacity: 0.7;
}

.hero h1 {
  font-size: 3.2rem;
  line-height: 1.12;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.hero h1 em {
  font-style: normal;
  font-weight: 300;
  color: var(--sage-dark);
  display: block;
}

.hero p {
  font-size: 1.08rem;
  opacity: 0.68;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.85;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.hero-image {
  flex: 0 1 460px;
  border-radius: 28px;
  overflow: hidden;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg);
  transform: rotate(1.5deg) translateY(8px);
  transition: var(--ease);
  border: 4px solid var(--white);
}

.hero-image:hover {
  transform: rotate(0deg) translateY(0);
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 32px;
  border-radius: 40px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--ease);
  font-size: 0.95rem;
  line-height: 1.4;
}

.btn-primary {
  background: var(--terra);
  color: #fff;
  box-shadow: 0 6px 20px rgba(224, 122, 95, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(224, 122, 95, 0.45);
}

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

.btn-outline:hover {
  background: var(--sage);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(122, 155, 118, 0.3);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--terra);
  position: relative;
  padding-left: 30px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 2px;
  background: var(--terra);
  border-radius: 2px;
}

.section-label::after {
  content: '';
  position: absolute;
  left: 10px;
  top: calc(50% - 3px);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--sage);
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--ink);
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 48px;
  line-height: 1.85;
  font-size: 0.95rem;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 30px;
}

.category-card {
  border-radius: var(--r-lg);
  padding: 36px 30px 32px;
  background: var(--white);
  border: 1px solid var(--line);
  transition: var(--ease);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--sage), var(--sage-light));
  opacity: 0;
  transition: var(--ease);
}

.category-card::after {
  content: '';
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(122, 155, 118, 0.04);
  transition: var(--ease);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

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

.category-card:hover::after {
  transform: scale(1.4);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  font-size: 1.4rem;
  background: linear-gradient(145deg, rgba(122, 155, 118, 0.18), rgba(122, 155, 118, 0.05));
  color: var(--sage-dark);
  position: relative;
  z-index: 1;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--terra);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--ease);
  position: relative;
  z-index: 1;
}

.card-link:hover {
  gap: 12px;
}

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

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

.feature-image::before {
  content: '';
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 18px;
  z-index: 1;
  opacity: 0;
  transition: var(--ease);
}

.feature-image:hover::before {
  opacity: 1;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--ease);
}

.feature-image:hover img {
  transform: scale(1.04);
}

.feature-text {
  padding: 20px 0;
}

.feature-text::first-letter {
  font-size: 3.4em;
  font-weight: 200;
  color: var(--sage);
  float: left;
  line-height: 0.8;
  padding-right: 12px;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 9px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--ink);
  border-bottom: 1px dashed var(--line);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--sage-dark);
  background: rgba(122, 155, 118, 0.14);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  flex-shrink: 0;
}

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

.stat-item {
  padding: 40px 24px 36px;
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--line);
  transition: var(--ease);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 2px;
  background: var(--terra);
  border-radius: 2px;
  opacity: 0;
  transition: var(--ease);
}

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

.stat-item:hover::after {
  opacity: 1;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 300;
  line-height: 1;
  color: var(--sage-dark);
  letter-spacing: -0.04em;
  font-family: Georgia, 'Times New Roman', serif;
}

.stat-label {
  font-size: 0.84rem;
  opacity: 0.6;
  margin-top: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.content-wall-item {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  transition: var(--ease);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--ease);
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 24px 26px 28px;
}

.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: var(--ease);
}

.faq-item:hover {
  border-color: rgba(122, 155, 118, 0.4);
}

.faq-item.open {
  border-color: var(--sage);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 22px 28px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  color: var(--ink);
  transition: var(--ease);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--sage);
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  line-height: 0.6;
}

.faq-item.open .faq-question {
  color: var(--sage-dark);
}

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

.faq-item .faq-answer {
  padding: 0 28px 24px;
  display: none;
  opacity: 0.7;
  font-size: 0.9rem;
  line-height: 1.8;
}

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

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 72px 40px;
  text-align: center;
  border-radius: var(--r-lg);
  color: #fff;
  background: linear-gradient(135deg, var(--sage-dark) 0%, var(--sage) 60%, #8fae8b 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(77, 107, 74, 0.3);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -50px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 12px;
  font-weight: 800;
  position: relative;
  z-index: 1;
  letter-spacing: -0.02em;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--sage-dark);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
  padding: 14px 42px;
  border-radius: 40px;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.2);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 64px 0 32px;
  background: var(--paper-dark);
  border-top: 1px solid var(--line);
  margin-top: 60px;
}

.site-footer .container {
  position: relative;
}

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

.footer-brand {
  line-height: 1.8;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.88rem;
  opacity: 0.6;
  margin-top: 12px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 18px;
  color: var(--ink);
  font-weight: 700;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: var(--sage);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--ink-light);
  font-size: 0.89rem;
  padding: 5px 0;
  transition: var(--ease);
}

.footer-col a:hover {
  color: var(--sage-dark);
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.84rem;
  color: var(--ink-lighter);
}

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

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 52px;
  opacity: 0.7;
  line-height: 1.85;
  font-size: 0.95rem;
}

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

/* ===== 响应式 768px ===== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(250, 247, 242, 0.98);
    padding: 28px 24px;
    box-shadow: 0 24px 50px rgba(61, 58, 56, 0.12);
    border-bottom: 1px solid var(--line);
    gap: 20px;
    backdrop-filter: blur(24px);
  }

  .main-nav.open a {
    padding: 10px 0;
    font-size: 0.95rem;
  }

  .hero {
    flex-direction: column;
    padding: 110px 0 60px;
    gap: 40px;
  }

  .hero-content {
    flex: 1 1 auto;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

  .hero-image {
    flex: 1 1 auto;
    transform: rotate(0deg);
    width: 100%;
    max-width: 480px;
  }

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

  .cta-banner {
    padding: 50px 28px;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }
}

/* ===== 响应式 480px ===== */
@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-item {
    padding: 28px 16px 24px;
  }

  .stat-number {
    font-size: 2.1rem;
  }

  .cta-banner {
    padding: 40px 20px;
    border-radius: 20px;
  }

  .cta-banner h2 {
    font-size: 1.4rem;
  }

  .feature-block {
    gap: 28px;
  }

  .card-icon {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }
}