:root {
  --primary: #FF6B35;
  --primary-light: #FFA67A;
  --primary-dark: #E5531F;
  --secondary: #1E6B5A;
  --secondary-light: #2A8A76;
  --bg: #FAF6EF;
  --bg-alt: #F5EFE6;
  --text: #2C2822;
  --text-light: #7A7168;
  --white: #FFFFFF;
  --shadow-amber: rgba(255, 107, 53, 0.18);
  --shadow-dark: rgba(44, 40, 34, 0.07);
}

/* 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(--bg);
  color: var(--text);
  padding-top: 68px;
  line-height: 1.6;
}

::selection {
  background: var(--primary);
  color: #fff;
}

a {
  color: inherit;
}

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

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

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

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 246, 239, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 107, 53, 0.1);
}

.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: 1.3rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 12px 4px 12px 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: linear-gradient(135deg, #FF8A3D, #FF6B35);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  padding: 4px 0;
  position: relative;
  transition: color 0.25s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  padding: 9px 22px;
  border-radius: 8px 2px 8px 2px;
  color: #fff !important;
  background: linear-gradient(135deg, #FF8A3D, #FF6B35);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
  font-weight: 600 !important;
}

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

.nav-cta:hover {
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin-bottom: 7px;
  box-shadow: 0 9px 0 var(--text);
  border-radius: 2px;
}

.menu-toggle::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* 首页Hero */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 26%, rgba(255, 107, 53, 0.14), transparent 42%),
    radial-gradient(circle at 18% 70%, rgba(30, 107, 90, 0.07), transparent 38%);
  padding: 100px 0 60px;
}

.hero::before {
  content: '88';
  position: absolute;
  right: 6%;
  top: 18%;
  font-size: 17rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.06em;
  color: rgba(255, 107, 53, 0.08);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 20px 4px 20px 4px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  letter-spacing: 1px;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  color: var(--text);
  position: relative;
}

.hero h1::after {
  content: '✦';
  display: inline-block;
  color: var(--primary);
  font-size: 0.75em;
  margin-left: 12px;
  animation: heroPulse 3s ease-in-out infinite;
}

@keyframes heroPulse {
  0%, 100% { opacity: 1; transform: scale(1) rotate(0deg); }
  50% { opacity: 0.6; transform: scale(1.2) rotate(15deg); }
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.hero-image {
  border-radius: 24px 6px 24px 6px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 107, 53, 0.22);
  position: relative;
  z-index: 1;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 8px 2px 8px 2px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: 0.25s ease;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, #FF8A3D, #FF6B35);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255, 107, 53, 0.45);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--secondary);
  color: var(--secondary);
  box-shadow: none;
}

.btn-outline:hover {
  background: rgba(30, 107, 90, 0.06);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 12px;
  color: var(--secondary);
  text-transform: uppercase;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.25;
  color: var(--text);
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  margin-right: 14px;
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.18);
  vertical-align: middle;
}

.section-desc {
  max-width: 600px;
  opacity: 0.75;
  margin-bottom: 44px;
  font-size: 1.05rem;
  color: var(--text-light);
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 26px;
}

.category-card {
  border-radius: 16px 4px 16px 4px;
  padding: 30px 28px;
  border: 1px solid rgba(44, 40, 34, 0.06);
  background: var(--white);
  box-shadow: 0 2px 12px rgba(44, 40, 34, 0.05);
  transition: 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--primary-light), transparent);
  opacity: 0.6;
}

.category-card:hover {
  transform: translateY(-4px) rotate(-0.4deg);
  box-shadow: 0 14px 34px rgba(255, 107, 53, 0.15);
  border-color: transparent;
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px 3px 12px 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.14), rgba(255, 166, 122, 0.1));
  color: var(--primary);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 14px;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--secondary);
  transition: color 0.2s;
}

.card-link::after {
  content: '→';
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.2s;
}

.card-link:hover {
  color: var(--primary);
}

.card-link:hover::after {
  transform: translateX(4px);
}

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

.feature-image {
  border-radius: 24px 6px 24px 6px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(30, 107, 90, 0.15);
}

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

.feature-text {
  position: relative;
}

.feature-text .section-label {
  margin-bottom: 8px;
}

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

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text);
  border-bottom: 1px solid rgba(44, 40, 34, 0.05);
}

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

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--primary);
  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 28px;
  border-radius: 16px 4px 16px 4px;
  border: 1px solid rgba(44, 40, 34, 0.05);
  background: var(--white);
  box-shadow: 0 2px 12px rgba(44, 40, 34, 0.05);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 15%;
  right: 15%;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 8px;
  letter-spacing: 0.5px;
}

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: 16px 4px 16px 4px;
  overflow: hidden;
  border: 1px solid rgba(44, 40, 34, 0.05);
  background: var(--white);
  box-shadow: 0 2px 12px rgba(44, 40, 34, 0.05);
  transition: 0.3s ease;
}

.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(255, 107, 53, 0.14);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.4s ease;
  filter: saturate(0.95) sepia(0.08);
}

.content-wall-item:hover img {
  transform: scale(1.04);
  filter: saturate(1.05) sepia(0);
}

.content-wall-body {
  padding: 22px 20px;
}

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

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}

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

.faq-item {
  border: 1px solid rgba(44, 40, 34, 0.07);
  border-radius: 12px 3px 12px 3px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: box-shadow 0.3s, border-color 0.3s;
}

.faq-item:hover {
  border-color: rgba(255, 107, 53, 0.2);
  box-shadow: 0 4px 18px rgba(255, 107, 53, 0.08);
}

.faq-item.open {
  border-color: rgba(255, 107, 53, 0.25);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

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

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 400;
  line-height: 1;
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 22px 20px;
  display: none;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.75;
}

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

/* CTA横幅 */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: 24px 6px 24px 6px;
  background: linear-gradient(135deg, #1E6B5A, #0F4A3E);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(30, 107, 90, 0.35);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -15%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-banner::after {
  content: '光影';
  position: absolute;
  bottom: -30px;
  left: 20px;
  font-size: 6rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.04);
  pointer-events: none;
  letter-spacing: -0.03em;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  opacity: 0.7;
  max-width: 560px;
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--secondary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

/* 页脚 */
.site-footer {
  padding: 60px 0 30px;
  background: #2C2822;
  color: rgba(255, 255, 255, 0.75);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '光影';
  position: absolute;
  bottom: -40px;
  right: 10px;
  font-size: 8rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.025);
  pointer-events: none;
  line-height: 1;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand .logo {
  color: #fff;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.7;
  max-width: 280px;
}

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

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s, transform 0.2s;
}

.footer-col a:hover {
  color: var(--primary-light);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 50px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

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

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

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

/* ⚠️ 响应式 */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.4rem;
  }

  .hero::before {
    font-size: 12rem;
    right: 2%;
  }

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

@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;
  }

  .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, 246, 239, 0.98);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid rgba(255, 107, 53, 0.1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  }

  .main-nav.open a {
    font-size: 1.05rem;
  }

  .main-nav.open .nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 8px;
  }

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

  .hero h1 {
    font-size: 2.1rem;
  }

  .hero::before {
    font-size: 8rem;
    top: 30%;
  }

  .section-title {
    font-size: 1.8rem;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

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

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

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

  .section {
    padding: 60px 0;
  }

  .cta-banner {
    padding: 48px 20px;
  }
}