header {
  padding-bottom: 62px;
}
html {
  scroll-behavior: smooth;
}
.page {
  padding: 0 13%;
}

.container-header .title {
  font-size: 36px;
  font-weight: 700;
  color: #000;
  padding: 84px 0 62px;
}

/* 导航 */
.nav {
  position: -webkit-sticky !important; /* 针对旧版 Safari 和 Chrome */
  position: sticky !important;
  top: 116px;
  z-index: 99999;
  background-color: #fff;
}
.nav-list {
  width: 100%;
  padding: 30px 0;
}

.nav-item {
  color: #666;
  font-size: 20px;
  text-align: center;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  transition: all 0.3s ease;
}

.nav-item:hover {
  color: var(--primary-color);
  text-align: center;
  font-weight: 700;
}

.nav-item-activate {
  color: var(--primary-color);
  text-align: center;
  font-weight: 700;
}

/* 平台管理 */
.platform-content {
  background: linear-gradient(to bottom left, transparent 50%, #f3fbf6 50%);
  padding-bottom: 60px;
}

.platform-left,
.platform-right {
  width: 48%;
}
.platform-left {
  margin-right: 4%;
}
.platform-left h4 {
  font-size: 32px;
  font-weight: 700;
}
.platform-left p {
  font-size: 24px;
  margin: 30px 0 40px;
}
.options button {
  padding: 12px 48px;
  border-radius: 6px;
  box-shadow: 0px 8px 20px 0px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(11, 176, 86, 1);
}
.options .register {
  margin-right: 38px;
  color: #fff;
  background-color: var(--primary-color);
}
.options .login {
  color: var(--primary-color);
  background-color: #fff;
}

/* 碳管理生命周期 */
.life-cycle {
  padding-bottom: 100px;
}

/* 碳中和路线图 */
.route-map {
  padding-bottom: 110px;
  background-color: #f3f6f7;
}

/*碳盘查 */
.question-card {
  border-radius: 30px;
  box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.25);
  background: #fff;
  padding: 30px;
  width: 48%;
}
.question-card:first-child {
  margin-right: 4%;
}
.question-card img {
  flex-shrink: 0;
  margin-right: 6px;
  width: 22px;
  height: 22px;
}
.question-card-item {
  align-items: baseline;
}
.question-card h4 {
  font-size: 20px;
  margin-bottom: 48px;
}
.question-card {
  font-size: 16px;
  color: #666;
}

.question-swiper {
  padding: 66px 0 106px;
  overflow: hidden;
}

.swiper-slide {
  display: inline-block;
  padding: 10px;
  margin-right: 24px;
  width: auto !important;
  border-radius: 30px;
  box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.25);
}
.swiper-pagination {
  display: none;
}

/* 投入曲线 */
.emission-reduction {
  padding-bottom: 92px;
  background: linear-gradient(to bottom, #fff 50%, #f3f6f7 50%);
}
.emission-reduction-content {
  position: relative;
}
.curve-map {
  position: relative;
  border-radius: 30px;
  z-index: 1000;
  width: 60%;
}
.energy {
  position: absolute;
  right: 0;
  top: -16%;
  border-radius: 30px;
  width: 45%;
}

/* 碳排放成本 */
.cost {
  padding-bottom: 240px;
}
.cost-card-item {
  width: 48%;
  margin-right: 4%;
  border-radius: 30px;
  box-shadow: 0px 8px 20px 0px rgba(0, 0, 0, 0.25);
  background: rgba(255, 255, 255, 1);
  padding: 2% 4%;
}
.cost-card-item:last-child {
  margin-right: 0;
}
.cost-item-title {
  padding-bottom: 50px;
}
.cost-item-title img {
  margin-right: 18px;
}
.cost-item-title h4 {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary-color);
}
.cost-item {
  padding-bottom: 20px;
  /* align-items: baseline; */
}

.cost-item img {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}
.cost-item {
  color: #666;
}
.cost-item p {
  font-size: 16px;
}

@media (max-width: 1200px) {
  .nav {
    top: 77px;
  }
  .options button {
    padding: 6px 24px;
    font-size: 20px;
  }
  .question-card {
    border-radius: 10px;
  }
  .cost-card-item {
    border-radius: 10px;
  }
  .swiper-slide {
    border-radius: 10px;
  }
}

@media (max-width: 992px) {
  .question-card {
    width: 98%;
  }
  .question-card:first-child {
    margin-right: 0;
  }
  .question-card {
    margin-bottom: 30px;
  }
  .question-card-item img {
    width: 14px;
    height: 14px;
  }
  .cost-item img {
    width: 14px;
    height: 14px;
  }
}

@media (max-width: 768px) {
  .nav {
    top: 62px;
  }
  .page {
    padding: 0 8%;
  }
  .container-header .title {
    font-size: 18px;
    padding: 30px 0;
  }
  .platform-left h4 {
    font-size: 24px;
  }
  .platform-left p {
    font-size: 18px;
    margin: 16px 0;
  }
  .options {
    padding-bottom: 20px;
  }
  .options button {
    font-size: 12px;
    padding: 3px 12px;
  }
  .nav-list {
    padding: 20px 0;
  }
  .options .register {
    margin-right: 12px;
  }

  .nav-item {
    font-size: 14px;
  }
  .cost-card-item {
    width: 100%;
    margin-right: 0;
    padding: 20px;
    margin-bottom: 20px;
  }
  .cost-item-title {
    padding-bottom: 20px;
  }
  .cost-card-item p {
    font-size: 14px;
  }
  .cost-item-title h4 {
    font-size: 18px;
  }
  .cost {
    padding-bottom: 60px;
  }
  .life-cycle {
    padding-bottom: 40px;
  }
  .route-map {
    padding-bottom: 40px;
  }
  .question-card {
    padding: 20px;
  }
  .question-card h4 {
    font-size: 16px;
    margin-bottom: 24px;
  }
  .question-card p {
    font-size: 12px;
  }
  .question-swiper {
    padding: 30px 0 50px;
  }
  .emission-reduction {
    padding-bottom: 46px;
  }
  .question-card-item img {
    width: 11px;
    height: 11px;
  }
  .cost-item img {
    width: 11px;
    height: 11px;
  }
}