*, *::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: #fefcf3;
  color: #2d3e4f;
}

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

.section { padding: 80px 0; }
.section:nth-child(even) { background: #f8f5eb; }

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 252, 243, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e8ddd0;
}

.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: 700;
  font-size: 1.3rem;
  text-decoration: none;
  color: #2d3e4f;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, #f4a261, #e76f51);
  color: #fff;
  box-shadow: 0 4px 12px rgba(231, 111, 81, 0.3);
}

.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: #4a5b6a;
  transition: 0.25s ease;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #e76f51;
  transition: width 0.3s;
}

.main-nav a:hover { color: #e76f51; }
.main-nav a:hover::after { width: 100%; }

.nav-cta {
  padding: 8px 24px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 600;
  background: linear-gradient(135deg, #f4a261, #e76f51);
  box-shadow: 0 4px 14px rgba(231, 111, 81, 0.35);
  transition: 0.25s;
}

.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(231, 111, 81, 0.45); }
.nav-cta::after { display: none !important; }

.menu-toggle { display: none; }

/* 首页Hero */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(244, 162, 97, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 16px;
  background: #f4a261;
  color: #fff;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 800;
  color: #1f2e3d;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.6;
}

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

.hero-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #f4a261, #e76f51);
  box-shadow: 0 4px 16px rgba(231, 111, 81, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(231, 111, 81, 0.45);
}

.btn-outline {
  background: transparent;
  border: 2px solid #e76f51;
  color: #e76f51;
}

.btn-outline:hover {
  background: #e76f51;
  color: #fff;
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 12px;
  text-transform: uppercase;
  color: #f4a261;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 14px;
  font-weight: 800;
  color: #1f2e3d;
  letter-spacing: -0.02em;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 40px;
  font-size: 1.05rem;
  line-height: 1.6;
}

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

.category-card {
  border-radius: 16px;
  padding: 32px;
  border: 1px solid #e8ddd0;
  background: #fff;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, #f4a261, #e76f51);
  opacity: 0;
  transition: opacity 0.3s;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  border-color: #f4a261;
}

.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: #fef0e6;
  color: #e76f51;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: #e76f51;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}

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

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

.feature-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0,0,0,0.06);
}

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

.feature-text { }

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  color: #3d4f5e;
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: #f4a261;
  font-size: 1.1rem;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 28px 16px;
  border-radius: 16px;
  border: 1px solid #e8ddd0;
  background: #fff;
  transition: 0.3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  border-color: #f4a261;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: #e76f51;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 500;
}

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

.content-wall-item {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid #e8ddd0;
  background: #fff;
  transition: all 0.3s ease;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  border-color: #f4a261;
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

.content-wall-body h4 { font-size: 1.1rem; margin-bottom: 6px; color: #1f2e3d; }
.content-wall-body p { font-size: 0.9rem; opacity: 0.7; line-height: 1.5; }

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

.faq-item {
  border: 1px solid #e8ddd0;
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: 0.25s;
}

.faq-item:hover { border-color: #f4a261; }

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #2d3e4f;
  font-size: 1rem;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: #f4a261;
  transition: transform 0.3s;
}

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

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.75;
  line-height: 1.6;
  color: #3d4f5e;
}

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

/* CTA横幅 */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: 20px;
  background: linear-gradient(135deg, #f4a261, #e76f51);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
}

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

.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; position: relative; z-index: 1; }

.cta-banner .btn-primary {
  background: #fff;
  color: #e76f51;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* 页脚 */
.site-footer {
  padding: 60px 0 28px;
  background: #2d3e4f;
  color: rgba(255,255,255,0.8);
}

.site-footer .container { }

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

.footer-brand h3 { color: #fff; font-size: 1.3rem; margin-bottom: 12px; }
.footer-brand p { opacity: 0.6; line-height: 1.6; font-size: 0.9rem; }

.footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.6); text-decoration: none; font-size: 0.9rem; transition: 0.2s; }
.footer-col ul li a:hover { color: #f4a261; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
}

/* 工具类 */
.text-accent { color: #e76f51; }

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  line-height: 1.6;
}

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

/* ⚠️ 响应式 */
@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: 32px; }
  .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: #fefcf3; padding: 24px; gap: 16px; border-bottom: 1px solid #e8ddd0; }
  .hero h1 { font-size: 2.4rem; }
  .hero::before { width: 300px; height: 300px; }
}

@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; }
  .hero h1 { font-size: 2rem; }
  .section-title { font-size: 1.8rem; }
  .stat-number { font-size: 2rem; }
}