body {
  max-width: 750px;
  margin: 0 auto;
  font-family: Arial;
}
* {
  box-sizing: border-box;
}
a {
  text-decoration: none;
}

p, h1, h2, h3, h4, h5, h6 {
  margin: 0;
}

ul {
  list-style: none;
}

.zixun-btn-box {
  display: flex;
  justify-content: center;
  margin-top: 30px;
}
.zixun-btn-box .zixun-btn {
  background-color: #f9bb0b;
  color: #ffffff;
  border-radius: 2px;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
  line-height: 30px;
  padding: 5px 30px;
}
.zixun-btn-box .zixun-btn img {
  width: 0px;
  height: 0px;
  display: inline-block;
  transition: width 0.5s ease;
}
.zixun-btn-box .zixun-btn:hover img {
  width: 29px;
  height: 16px;
  margin-left: 10px;
}

.banner img {
  width: 100%;
  height: auto;
  display: block;
}

section .section-title {
  text-align: center;
  font-size: 30px;
  font-family: Arial;
  font-weight: 700;
}
section .section-title span {
  position: relative;
}
section .section-title span::before, section .section-title span::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}
section .section-title span::before {
  left: 0;
}
section .section-title span::after {
  transform: translateY(-50%) rotate(180deg);
  right: 0;
}
section .title1 span::before, section .title1 span::after {
  background: url("../images/carbon_black/title_icon1.png") no-repeat center center;
  background-size: 100% 100%;
}
section .title2 span::before, section .title2 span::after {
  background: url("../images/carbon_black/title_icon2.png") no-repeat center center;
  background-size: 100% 100%;
}

.first-section {
  padding: 25px 15px 30px;
}
.first-section .section-title {
  color: #333;
}
.first-section .left-text1 {
  color: #666;
  font-size: 18px;
  line-height: 30px;
  margin-top: 15px;
}
.first-section .first-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 10px;
}
.first-section .first-bottom .left-list {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  padding: 0;
  margin: 0;
  row-gap: 10px;
}
.first-section .first-bottom .left-list li {
  width: 50%;
  color: #333;
  font-size: 18px;
  line-height: 30px;
  padding-left: 25px;
  position: relative;
}
.first-section .first-bottom .left-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #086afa;
}
.first-section .first-bottom .right-img {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 10px;
}

.second-section {
  background: url("../images/carbon_black/second_bg.jpg") no-repeat center center;
  background-size: cover;
}
.second-section .second-content {
  padding: 35px 15px 20px;
}
.second-section .second-content .section-title, .second-section .second-content .second-text, .second-section .second-content h3 {
  color: #fff;
}
.second-section .second-content .second-text {
  color: #fff;
  font-size: 18px;
  line-height: 30px;
}
.second-section .second-content h3 {
  font-size: 18px;
  line-height: 30px;
  font-weight: bold;
  margin-top: 15px;
  margin-bottom: 10px;
}
.second-section .second-content .second-img {
  width: 100%;
  height: auto;
  display: none;
  margin-top: 10px;
}

.third-section {
  padding: 25px 15px 0;
}
.third-section .section-title {
  color: #333;
}
.third-section .third-part .part-title {
  color: #1478fc;
  font-size: 22px;
  line-height: 30px;
  font-weight: 700;
}
.third-section .third-part .part-text {
  color: #333;
  margin-top: 10px;
  font-size: 18px;
  line-height: 30px;
}
.third-section .third-part .part-img {
  width: 100%;
  display: none;
  height: auto;
  padding: 30px 0;
}
.third-section .third-part1 {
  background: url("../images/carbon_black/third_bg1.jpg") no-repeat center center;
  background-size: 100% 100%;
  margin-top: 25px;
  padding: 15px 20px;
}
.third-section .third-part2 {
  border: solid 2px #77adfd;
  margin-top: 25px;
  padding: 15px 20px;
}

.fourth-section {
  background: url("../images/carbon_black/second_bg.jpg") no-repeat center center;
  background-size: cover;
  margin-top: 35px;
}
.fourth-section .fourth-content {
  padding: 40px 15px 35px;
}
.fourth-section .fourth-content .section-title {
  color: #fff;
  margin-bottom: 20px;
}
.fourth-section .fourth-content .fourth-text {
  color: #fff;
  font-size: 18px;
  line-height: 30px;
}
.fourth-section .fourth-content .fourth-list {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 25px 0 0;
}
.fourth-section .fourth-content .fourth-list .fourth-item {
  color: #333;
  width: 48%;
  margin-bottom: 25px;
}
.fourth-section .fourth-content .fourth-list .fourth-item img {
  width: 100%;
  height: auto;
  display: block;
}
.fourth-section .fourth-content .fourth-list .fourth-item p {
  font-size: 18px;
  line-height: 30px;
  padding: 7px 0;
  text-align: center;
  background: #fff;
}

.fifth-section {
  padding: 25px 15px 0;
}
.fifth-section .section-title {
  color: #333;
}
.fifth-section .fifth-text {
  color: #333;
  margin-top: 20px;
  font-size: 18px;
  line-height: 30px;
}

.sixth-section {
  background: #e4f1ff;
  padding: 30px 15px 40px;
  margin-top: 30px;
}
.sixth-section .section-title {
  color: #333;
}
.sixth-section .sixth-text {
  margin-top: 25px;
  color: #333;
  font-size: 18px;
  line-height: 30px;
}
.sixth-section .sixth-content {
  background: url("../images/carbon_black/sixth_bg.jpg") no-repeat center center;
  background-size: cover;
  margin-top: 25px;
  border-radius: 50px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  align-items: center;
}
.sixth-section .sixth-content .left-content {
  width: 100%;
  padding: 20px;
}
.sixth-section .sixth-content .left-content img {
  max-width: 70%;
  margin: 0 auto;
  display: block;
  position: relative;
}
.sixth-section .sixth-content .right-content {
  width: 100%;
  padding: 20px 30px 30px;
  color: #fff;
}
.sixth-section .sixth-content .right-content h4 {
  font-size: 18px;
  line-height: 30px;
  font-weight: bold;
  margin-bottom: 10px;
  margin-top: 18px;
  color: #fff;
}
.sixth-section .sixth-content .right-content h4:nth-child(1) {
  margin-top: 0;
}
.sixth-section .sixth-content .right-content p {
  font-size: 16px;
  line-height: 28px;
}
.sixth-section .sixth-content .right-content .more-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  margin-top: 20px;
  width: 130px;
  height: 40px;
  font-size: 16px;
  line-height: 24px;
  background: #f9bb0b;
  background-size: 200% auto;
  transition: background 0.5s ease;
  margin-right: 15px;
}
.sixth-section .sixth-content .right-content .more-btn:hover {
  background-image: linear-gradient(to right, #f9bb0b 10%, #f0ece0 51%, #f9bb0b 100%);
  background-position: center right;
}
.sixth-section .sixth-content .right-content .more-btn img {
  display: inline-block;
  margin-left: 20px;
}

.seventh-section {
  padding: 25px 15px 0;
}
.seventh-section .section-title {
  color: #333;
}
.seventh-section .seventh-content {
  margin-top: 25px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.seventh-section .seventh-content .seventh-item {
  margin-bottom: 25px;
  width: 100%;
  background: #f5faff;
}
.seventh-section .seventh-content .seventh-item:last-child {
  margin-bottom: 0;
}
.seventh-section .seventh-content .seventh-item .case-img {
  overflow: hidden;
}
.seventh-section .seventh-content .seventh-item .case-img img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.5s ease;
}
.seventh-section .seventh-content .seventh-item .case-img:hover img {
  transform: scale(1.05);
}
.seventh-section .seventh-content .seventh-item .case-text {
  padding: 20px 20px 30px;
}
.seventh-section .seventh-content .seventh-item .case-text h3 {
  color: #333;
  font-weight: bold;
  font-size: 18px;
  line-height: 30px;
  margin-bottom: 10px;
}
.seventh-section .seventh-content .seventh-item .case-text p {
  color: #333;
  font-size: 16px;
  line-height: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.seventh-section .seventh-content .seventh-item .case-text p span {
  width: 100%;
}
.seventh-section .seventh-content .seventh-item .case-text a {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  margin-top: 20px;
  width: 130px;
  height: 40px;
  font-size: 16px;
  line-height: 24px;
}
.seventh-section .seventh-content .seventh-item .case-text a img {
  display: inline-block;
  margin-left: 20px;
}
.seventh-section .seventh-content .seventh-item .case-text .more-btn {
  background: #f9bb0b;
  background-size: 200% auto;
  transition: background 0.5s ease;
  margin-right: 15px;
}
.seventh-section .seventh-content .seventh-item .case-text .more-btn:hover {
  background-image: linear-gradient(to right, #f9bb0b 10%, #f0ece0 51%, #f9bb0b 100%);
  background-position: center right;
}
.seventh-section .seventh-content .seventh-item .case-text .swt-btn {
  background: #086afa;
  background-size: 200% auto;
  transition: background 0.5s ease;
}
.seventh-section .seventh-content .seventh-item .case-text .swt-btn:hover {
  background-image: linear-gradient(to right, #086afa 10%, #a9c5f3 51%, #086afa 100%);
  background-position: center right;
}

.eighth-section {
  padding: 30px 15px;
}
.eighth-section .section-title {
  color: #333;
}
.eighth-section .eighth-content {
  margin-top: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.eighth-section .eighth-content .left-item {
  width: 100%;
  padding-bottom: 25px;
}
.eighth-section .eighth-content .left-item p {
  font-size: 18px;
  line-height: 30px;
  color: #333;
}
.eighth-section .eighth-content .right-item {
  width: 100%;
}
.eighth-section .eighth-content .right-item img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 575px) {
  .zixun-btn-box {
    margin-top: 30px;
  }
  .zixun-btn-box .zixun-btn {
    padding: 10px 30px;
    font-size: 16px;
    max-width: 90%;
    text-align: center;
  }
  .sixth-section .sixth-content {
    border-radius: 15px;
  }
  .sixth-section .sixth-content .right-content{
    padding: 20px 15px 25px;
  }
  .fourth-section .fourth-content .fourth-list .fourth-item p{
    font-size: 16px;
  }
  section .section-title {
    font-size: 26px;
  }
  section .section-title span::before, section .section-title span::after {
    display: none;
  }
  .first-section .first-bottom .left-list li {
    width: 100%;
  }
}