.navigation-holder-box {
  height: 45px;
}
.navigation-bar {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  height: 45px;
  position: relative;
  padding: 0 12px;
  box-sizing: border-box;
  background: #fff;
  position: fixed;
  top: 0;
  z-index: 9;
  width: 100%;
}
.navigation-bar .navigation-left-btn-box {
  left: 0;
}
.navigation-bar .navigation-right-btn-box {
  right: 0;
}
.navigation-bar .navigation-btn-box {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  z-index: 999;
  position: absolute;
}
.navigation-bar .navigation-btn-box .btn-common {
  padding: 0 12px;
  box-sizing: border-box;
  height: 44px;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: center;
}
.navigation-bar .navigation-btn-box .btn-common .icon {
  display: block;
  width: 22px;
  height: 22px;
}
.navigation-bar .navigation-center-box {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  line-height: 44px;
  text-align: center;
  z-index: 0;
}
.navigation-bar .navigation-center-box .logo-box .title {
  font-size: 17px;
  line-height: 18px;
  font-family: PingFang-SC-Bold, PingFang-SC;
  font-weight: bold;
  color: #3c3c3c;
  margin-bottom: 1px;
  white-space: nowrap;
}
.navigation-bar .navigation-center-box .logo-box .website {
  font-size: 12px;
  line-height: 13px;
  font-family: PingFang-SC-Medium, PingFang-SC;
  font-weight: 500;
  color: #3c3c3c;
}
.bottom-intro-box {
  background: #fff;
  padding: 0 20px 30px 20px;
  box-sizing: border-box;
  border-bottom: #f6f9fd solid 8px;
}
.bottom-intro-box .content-box {
  background: #f6f6f6;
  border-radius: 10px;
  padding: 15px 15px 15px 15px;
  box-sizing: border-box;
}
.bottom-intro-box .content-box .text {
  display: block;
  font-size: calc(100vw / 750 * 24);
  line-height: calc(100vw / 750 * 40);
  font-family: PingFang-SC-Medium, PingFang-SC;
  font-weight: 500;
  color: #666666;
}
.border-bottom {
  border-bottom: #f6f9fd solid 8px;
}
.common-tool-box {
  background: #fff;
}
.common-tool-box .title-box {
  padding: 0 calc(100vw / 750 * 30);
  box-sizing: border-box;
  height: 45px;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
}
.common-tool-box .title-box .title {
  font-size: calc(100vw / 750 * 36);
  font-weight: bold;
  color: #3c3c3c;
}
.common-tool-box .title-box .more-box {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
}
.common-tool-box .title-box .more-box .text {
  font-size: 12px;
  font-family: PingFang-SC-Medium, PingFang-SC;
  font-weight: 500;
  color: #9b9eac;
  margin-right: 2px;
}
.common-tool-box .title-box .more-box .icon {
  display: block;
  width: 14px;
  height: 14px;
}
.common-tool-box .tool-box {
  padding: 0 calc(100vw / 750 * 48);
  box-sizing: border-box;
  display: flex;
  flex-flow: row wrap;
  align-items: center;
}
.common-tool-box .tool-box .item {
  width: calc((100vw - (100vw / 750 * 48 * 2) - 45px) / 4);
  margin-bottom: 15px;
  margin-right: 15px;
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
  justify-content: center;
}
.common-tool-box .tool-box .item:nth-child(4n) {
  margin-right: 0;
}
.common-tool-box .tool-box .item .pic-box {
  width: calc((100vw - (100vw / 750 * 48 * 2) - 45px) / 4);
  height: calc((100vw - (100vw / 750 * 48 * 2) - 45px) / 4);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #e4e4e4;
  box-sizing: border-box;
}
.common-tool-box .tool-box .item .pic-box .icon {
  display: block;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}
.common-tool-box .tool-box .item .name {
  font-size: 12px;
  color: #0f1d37;
  line-height: 28px;
  width: calc((100vw - (100vw / 750 * 48 * 2) - 45px) / 4);
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
}
.intro-box {
  width: 100%;
  background-color: #fff;
  padding: calc(100vw / 750 * 25) calc(100vw / 750 * 30) calc(100vw / 750 * 30) calc(100vw / 750 * 30);
  box-sizing: border-box;
  margin-bottom: calc(100vw / 750 * 16);
}
.intro-box .title {
  font-size: calc(100vw / 750 * 36);
  font-weight: bold;
  color: #3c3c3c;
  margin-bottom: calc(100vw / 750 * 8);
}
.intro-box .intro-text {
  font-size: calc(100vw / 750 * 28);
  line-height: calc(100vw / 750 * 48);
  color: #666;
}