.flex {
  display: flex;
}

.header_banner {
  position: relative;
}

.header_banner img {
  width: 100%;
}

.header_banner .content {
  position: absolute;
  left: 15%;
  top: 50%;
  transform: translateY(-50%);
  width: 30%;
  color: #fff;
}

.header_banner .content h1 {
  font-weight: bolder;
  font-size: clamp(1.5rem, 3vw, 3rem);
}

.top_tab {
  border-bottom: solid 2px #f6f6f6;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
}

.top_tab a {
  display: block;
  line-height: 2.5;
  padding: 0 20px;
  color: black;
}

.top_tab a:hover,
.top_tab a.active {
  background-color: #ffe1d2;
  color: var(--theme-color-blue);
  font-weight: bolder;
}

.top_tab a.active {
  border-bottom: solid 3px var(--theme-color-orange);
}

.section_01 {
  justify-content: center;
  align-items: center;
  gap: 10%;
}

.section_01,
.section_02,
.section_03,
.section_04,
.section_05,
.section_06 {
  /* margin: 5% 0; */
}

.section_01 img {
  width: 30%;
}

.section_01 .title,
.section_02 .title,
.section_03 .title,
.section_04 .title {
  font-size: clamp(1.5rem, 3vw, 3rem);
  font-weight: bolder;
  color: var(--theme-color-blue);
  line-height: 1.5;
  margin-bottom: 40px;
}

.section_01 p {
  color: var(--theme-color-blue);
  font-size: 18px;
  line-height: 1.6;
}

.section_02 {
  width: 100%;
  text-align: center;
  min-height: 59vw;
}

.section_02 p {
  width: 100%;
  margin: 0 auto;
  font-size: 18px;
  line-height: 1.6;
}

.section_02 .card_box {
  flex-wrap: wrap;
  margin-top: 20px;
  margin-bottom: 20px;
  gap: 1vw;
  justify-content: left;
  align-items: end;
  padding: 40px 0;
}

.section_02 .card_box .card {
  min-width: 240px;
  width: calc((100% - 4 * 1vw) / 5);
  padding: 20px;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background-color: rgba(255, 255, 255, .90);
  border: none;
  border-radius: 8px;
  container-type: inline-size;
  text-align: left;
}

.section_02 .card_box .card:nth-child(2n) {
  margin-bottom: 60px;
}

.section_02 .card_box .card h3 {
  font-size: 12cqw;
  font-weight: bolder;
  color: var(--theme-color-orange);
  margin-bottom: 12cqw;
}

.section_02 .card_box .card p {
  width: 100%;
  font-size: 9cqw;
  margin: 0;
}

.section_03 .title {
  text-align: center;
}

.section_03 .img_content {
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 1vw;
}

.section_03 .img_content .left_box {
  flex: 1 1 65%;
}

.section_03 .img_content .left_box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section_03 .img_content .right_box {
  flex: 1 1 35%;
  flex-wrap: nowrap;
  flex-direction: column;
  justify-content: space-between;
  gap: 1vw;
}

.section_03 .img_content .right_box img {
  position: relative;
  width: 100%;
}

.section_03 .img_box,
.section_04 .img_box {
  position: relative;
  display: block;
}

.section_03 .img_box p,
.section_04 .img_box p {
  position: absolute;
  width: 100%;
  left: 0;
  bottom: 0;
  padding: 16px 20px;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: bolder;
  color: #fff;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.0) 0%, rgba(0, 0, 0, 0.6) 100%);
}

.section_04 .title {
  text-align: center;
}

.section_04 .content_wraper {
  flex-wrap: nowrap;
  aspect-ratio: 5 / 2;
}

.section_04 .left_box {
  flex: 1 1 65%;

}

.section_04 .left_box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section_04 .right_box {

  flex: 1 1 35%;
  padding: 20px;
  background-color: #f6f6f6;
  overflow: hidden;
}

.section_04 .hidden_wraper {
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
}

.section_04 .right_box h3 {
  font-weight: bolder;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  margin-bottom: 10px;
}

.section_04 .right_box p {
  width: calc(100% + 16px);
  height: 100%;
  font-size: 1rem;
  line-height: 2;
  overflow: auto;
}

.section_04 .right_box .button {
  justify-content: end;
  align-items: center;
  margin-top: 4%;
}



.section_05 {
  padding: 40px;
  background: linear-gradient(180deg, #f6f6f6 0%, rgba(0, 0, 0, 0) 100%);
  text-align: center;
}

.section_05 .title {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: bold;
  margin-bottom: 2%;
}

.section_06 {
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: center;
}

.section_06 .row_box>div {
  flex: 1 1 50%;
  background-color: #f6f6f6;
}

.section_06 .text_box {
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}

.section_06 .text_box h3 {
  font-weight: bolder;
  margin-bottom: 10px;
}

.section_06 div img {
  width: 100%;
}

@media screen and (min-width: 992px) {
  .row_box:nth-child(2n) {
    flex-direction: row-reverse;
  }
}

@media screen and (max-width: 991px) {
  .header_banner .content {
    width: 100%;
    padding: 0 10px;
    left: 0;
  }

  .header_banner .content p {
    display: none;
  }

  .section_01 {
    flex-direction: column;
    gap: 15px;
    margin-top: 50px;
  }

  .section_01 img {
    width: 80%;
  }

  .section_01 .title,
  .section_02 .title,
  .section_03 .title,
  .section_04 .title {
    margin-bottom: 15px;
    margin-top: 50px;
  }

  .section_01 .title {
    text-align: center;
  }

  .section_02 .container div p {
    width: 100%;
    text-align: left;
    font-size: 16px;
  }

  .section_02 .card_box {
    margin: 0;
    gap: 5vw;
  }

  .section_02 .card_box .card {
    width: 100%;
    aspect-ratio: unset;
  }

  .section_02 .card_box .card:nth-child(2n) {
    margin-bottom: 0;
  }

  .section_02 .card_box .card h3 {
    font-size: clamp(1.1rem, 6.5cqw, 1.5rem);
  }

  .section_02 .card_box .card p {
    font-size: clamp(0.8rem, 4.5cqw, 1.1rem);
  }

  .section_02 .card_box .card h3 {
    margin-bottom: 1rem;
  }

  .section_03 .img_content {
    flex-direction: column;
  }

  .section_04 .content_wraper {
    flex-direction: column;
  }

  .section_04 .right_box {
    overflow: visible;
  }

  .section_04 .right_box p {
    width: 100%;
  }

  .section_05 {
    padding-left: 0px;
    padding-right: 0px;
  }

  .section_05 p {
    text-align: left;
    line-height: 1.6;
  }

  .section_06 {
    flex-direction: column;
    gap: 15px;
  }

  .section_06 .row_box {
    flex-direction: column;
  }

  .section_06 .row_box.sp_revers {
    flex-direction: column-reverse;
  }

  .section_01 p,
  .section_04 .right_box p {
    font-size: 16px;
    line-height: 1.6;
  }
  .download-grid {
    grid-template-columns: repeat(1, 1fr) !important;
  }

  .download-item:nth-child(-n+6) {
    gap: 10px;
  }

  .download-item span {
    text-align: left;
  }
  .section_05 .title{
        margin-bottom: 6%;
  }
}

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

body {
  background-color: #f5f5f5;
}

.container {
  max-width: 1500px;
  margin: 0 auto;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.download-item {
  background-color: #fff;
  padding: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* 默认隐藏超出6个的项 */
  display: none;
}

/* 显示前6个项 */
.download-item:nth-child(-n+6) {
  display: flex;
}

.download-item span {
  font-size: 16px;
  color: #333;
}

.pdf-icon {
  width: 40px;
  height: 50px;
  border: 2px solid #ccc;
  border-radius: 4px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #999;
}

.pdf-icon::before {
  content: "PDF";
}

.pdf-icon::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 12px 12px 0;
  border-color: transparent #ccc transparent transparent;
}

.more-btn {
  text-align: center;
  color: #666;
  cursor: pointer;
  font-size: 14px;
  padding: 10px;
}

.more-btn::after {
  content: "▼";
  margin-left: 5px;
  font-size: 12px;
}

/* 展开后按钮样式变化 */
.more-btn.collapsed::after {
  content: "▲";
}