* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", Arial, sans-serif;
}

:root {
  --main-blue: rgb(60 60 59);
  --main-orange: #f37a20;
  --gray-text: #666666;
  --light-bg: #f5f7fa;
  --white: #ffffff;
}

body {
  background: #fff;
  color: #333;
  line-height: 1.8;
}

a {
  text-decoration: none;
}

ul {
  list-style: none;
}

header {
  background: rgb(60 60 59);
  padding: 0%;
  position: sticky;
  top: 0;
  z-index: 999;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.nav {
  max-width: 90%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      background-color: #ffffff;
      height: 80px;
    }

    .logo-img {
      height: 80px;
      width: auto;
      display: block;
      padding: 10px 25px 10px 25px;
    }

.logo-text {
  color: #fff;
  font-size: 40px;
  font-weight: 600;
  white-space: nowrap;
  margin-left: 10px;
}

.nav-menu {
  display: flex;
  gap: 28px;
}

.nav-menu a {
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  transition: color 0.3s;
  white-space: nowrap;
}

.nav-menu a:hover {
  color: var(--nkm-orange);
}

/* 面包屑+标题区 */
.banner-title {
  width: 100%;
  background: var(--light-bg);
  padding: 60px 0;
  text-align: center;
  position: relative;
}

.banner-title h1 {
  font-size: 38px;
  color: var(--main-blue);
  margin-bottom: 10px;
}

.banner-title p {
  font-size: 17px;
  color: var(--gray-text);
  max-width: 900px;
  margin: 0 auto;
}

/* 外层容器 中间总竖线 */
.timeline-wrap {
  max-width: 1200px;
  margin: 80px auto;
  padding: 0 20px;
  position: relative;
}

.timeline-wrap::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--main-blue);
  transform: translateX(-50%);
  z-index: 0;
}

/* 单项容器 */
.timeline-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 60px;
  position: relative;
  opacity: 0;
  transform: translateY(60px);
  transition: all 0.8s ease;
}

.timeline-item.show {
  opacity: 1;
  transform: translateY(0);
}

/* 奇数：左图 右文字 */
.timeline-item:nth-child(odd) .timeline-img {
  order: 1;
}

.timeline-item:nth-child(odd) .timeline-text {
  order: 2;
}

/* 偶数：右图 左文字 */
.timeline-item:nth-child(even) .timeline-img {
  order: 2;
}

.timeline-item:nth-child(even) .timeline-text {
  order: 1;
}

/* 图片区块 */
.timeline-img {
  width: 46%;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  z-index: 2;
}

.timeline-img img {
  width: 100%;
  height: auto;
  display: block;
  transition: 0.4s;
}

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

/* 文字区块 */
.timeline-text {
  width: 46%;
  z-index: 2;
}

.step-number {
  position: absolute;
  left: 50%;
  top: 26px;
  width: 20px;
  height: 20px;
  background: var(--main-orange);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.step-icon {
  width: 62px;
  height: 62px;
  background: var(--main-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  margin-bottom: 15px;
  box-shadow: 0 4px 15px rgba(243, 122, 32, 0.3);
}

.timeline-text h3 {
  font-size: 22px;
  color: var(--main-blue);
  margin-bottom: 15px;
}

.timeline-text p {
  color: var(--gray-text);
  font-size: 15px;
  line-height: 1.9;
}

.footer-top {
  background: var(--main-blue);
  color: #fff;
}

.footer-row {
  max-width: 1400px;
  margin: 0 auto;
  padding: 50px 5%;
  display: flex;
  flex-wrap: wrap;
  gap: 50px;
}

.footer-col {
  flex: 1;
  min-width: 260px;
}

.footer-col h4 {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--main-orange);
  display: inline-block;
}

.footer-col p {
  margin-bottom: 10px;
  line-height: 1.7;
}

.footer-col a {
  color: #fff;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--main-orange);
}

.footer {
  background: var(--main-blue);
  color: #fff;
  text-align: center;
  padding: 40px 5%;
  /* margin-top: 40px; */
}

.footer p {
  font-size: 15px;
  opacity: 0.9;
}

/* 移动端适配 */
@media (max-width: 992px) {

  .timeline-wrap::before,
  .step-number {
    display: none;
  }

  .timeline-item {
    flex-direction: column !important;
  }

  .timeline-img,
  .timeline-text {
    width: 100%;
  }

  .timeline-text {
    margin-top: 20px;
  }

  .header .nav-menu a {
    margin-left: 15px;
  }

  .banner-title h1 {
    font-size: 28px;
  }
}