/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #c15f3c;
  --primary-dark: #a44e30;
  --text: #2b2622;
  --text-light: #6b6058;
  --bg: #fdfaf6;
  --bg-alt: #f6efe6;
  --border: #ece2d6;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 250, 246, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-mark {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.nav a {
  margin-left: 28px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}

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

/* 首屏 */
.hero {
  padding: 130px 0;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--primary);
  background: rgba(193, 95, 60, 0.1);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 1px;
  margin-bottom: 22px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 38px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btn {
  display: inline-block;
  padding: 13px 38px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  font-size: 16px;
  transition: all 0.2s;
}

.hero-btn:hover {
  background: var(--primary-dark);
}

.hero-btn.ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.hero-btn.ghost:hover {
  background: rgba(193, 95, 60, 0.08);
}

/* 通用区块 */
.section {
  padding: 88px 0;
}

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

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-title.left {
  text-align: left;
}

.section-text {
  max-width: 760px;
  margin: 0 auto 44px;
  text-align: center;
  color: var(--text-light);
  font-size: 16px;
}

/* 服务能力 */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}

.service-card {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(193, 95, 60, 0.1);
}

.service-card h3 {
  font-size: 19px;
  margin-bottom: 12px;
  color: var(--primary);
}

.service-card p {
  color: var(--text-light);
  font-size: 15px;
}

/* 为什么选择我们 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.feature-item {
  padding: 8px 4px;
}

.feature-num {
  display: inline-block;
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.55;
  margin-bottom: 10px;
}

.feature-item h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.feature-item p {
  color: var(--text-light);
  font-size: 15px;
}

/* 关于我们 */
.about-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-text p {
  margin-top: 16px;
  color: var(--text-light);
  font-size: 16px;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.highlight {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  text-align: center;
}

.highlight-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.highlight-desc {
  font-size: 13px;
  color: var(--text-light);
}

/* 联系我们 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  flex-direction: column;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.contact-label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 6px;
}

.contact-value {
  font-size: 16px;
  font-weight: 600;
}

/* 页脚备案号 */
.site-footer {
  background: #2b2622;
  color: #cfc6bc;
  padding: 36px 0;
  text-align: center;
}

.footer-company {
  font-size: 15px;
  margin-bottom: 10px;
  color: #fff;
}

.footer-beian {
  font-size: 14px;
  color: #a89e94;
}

.footer-beian a {
  color: #cfc6bc;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-beian a:hover {
  color: #fff;
  text-decoration: underline;
}

/* 响应式 */
@media (max-width: 768px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .nav a {
    margin-left: 16px;
    font-size: 14px;
  }
  .hero {
    padding: 84px 0;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 26px;
  }
}