.box_1 {
  background-image: url(../images/index/bg1.jpg);
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

.brief-top {
  display: flex;
  align-items: center;
  justify-content: center;
}
.brief-top h2 {
  font-weight: bold;
  font-size: 55px;
  color: #073682;
  margin-left: 73px;
}
.brief-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.brief-bottom .img-box {
  width: 46%;
  flex-shrink: 0;
  -webkit-flex-shrink: 0;
  margin-right: 45px;
}
.index-more-btn {
  width: 100%;
  display: flex;
  justify-content: flex-end;
  margin-top: 37px;
  padding-right: 16%;
}
.brief-bottom .img-box img {
  width: 100%;
  height: auto;
  object-fit: contain;
}
.play-btn {
  width: 111px;
  height: 111px;
  border: 2px solid transparent;
  opacity: 1;
  background: #073682;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  flex-shrink: 0;
  -webkit-flex-shrink: 0;
  margin-left: 50px;
  margin-right: 25px;
  margin-top: 38px;
  position: relative;
  cursor: pointer;
  transition: all 0.3s ease;
}

.play-btn:hover {
  opacity: 1;
  transform: scale(1.05);
}

.play-btn::before,
.play-btn::after {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 2px solid transparent;
  border-radius: 50%;
  opacity: 0;
  animation: ripple-out 2s linear infinite;
}

.play-btn::before {
  border-color: #073682;
}

.play-btn::after {
  border-color: #00a0e9;
  animation-delay: 0.5s;
}

@keyframes ripple-out {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

.play-btn img {
  position: relative;
  z-index: 2;
  transition: transform 0.3s ease;
}

.play-btn:hover img {
  transform: scale(1.1);
}
.brief-word {
  display: flex;
  flex: 1;
  overflow: hidden;
}
.brief-word > div {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.brief-word p {
  /* font-size: 18px;
  color: #073682;
  line-height: 35px; */
  /* margin-bottom: 33px; */
  font-family:
    Alibaba PuHuiTi,
    Alibaba PuHuiTi;
  font-weight: 400;
  font-size: 28px;
  color: #002a70;
  line-height: 45px;
  margin: 0;
  text-align: justify;
  text-justify: inter-word;
}

/* 视频弹窗样式 */
.video-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 8%;
  width: 100%;
  height: 100%;
  background: transparent;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.video-modal-content {
  position: relative;
  margin: 5% auto;
  width: 90%;
  max-width: 1000px;
  background-color: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close-btn {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 35px;
  font-weight: bold;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.close-btn:hover {
  background-color: rgba(15, 115, 190, 0.8);
  transform: scale(1.1);
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 宽高比 */
  height: 0;
  overflow: hidden;
}

.video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.box_2 {
  background-image: url(../images/index/bg2.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  /* background-attachment: fixed; */
  display: flex;
  justify-content: space-between;
  height: 963px;
  padding: 0;
  overflow: hidden;
}
.box-item {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
.box-item h5 {
  font-weight: bold;
  font-size: 26px;
  color: #ffffff;
  letter-spacing: 2px;
  text-shadow: 0px 3px 6px rgba(0, 0, 0, 0.16);
  margin-top: 26px;
  margin-bottom: 14px;
}
.box-item p {
  font-size: 16px;
  color: #ffffff;
}
.line-white {
  width: 1px;
  background: rgba(255, 255, 255, 0.1);
  height: 100%;
  position: relative;
}
.line-g {
  position: absolute;
  width: 1px;
  left: 0;
  height: 100px;
  background: linear-gradient(0deg, transparent, #fff, transparent);
  animation: linemove 2.5s infinite linear;
}
.line-g1 {
  animation-delay: 0s;
}
.line-g2 {
  animation-delay: 0.8s;
}
.line-g3 {
  animation-delay: 0.4s;
}
.contact-box {
  background-image: url(../images/index/bg4.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding-top: 120px;
  padding-bottom: 107px;
}
.contact-safe {
  display: flex;
}
.contact-l h3 {
  font-weight: bold;
  font-size: 55px;
  color: #ffffff;
  margin-bottom: 24px;
}
.contact-l p {
  font-size: 26px;
  color: #ffffff;
  margin-bottom: 53px;
}
.contact-label,
.contact-value {
  display: flex;
  align-items: center;
  color: #fff;
}
.contact-label {
  margin-bottom: 9px;
}
.contact-label span {
  font-weight: bold;
  font-size: 20px;
}
.contact-label img {
  margin-right: 12px;
  width: 23px;
  height: auto;
}
.contact-value {
  margin-bottom: 27px;
}
.contact-value span {
  font-size: 18px;
}
.small-line {
  width: 22px;
  height: 3px;
  background: #ffffff;
  margin-right: 12px;
}
@keyframes linemove {
  0% {
    top: -100px;
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    top: 100%;
    opacity: 0;
  }
}

.box-item {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.box-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 0;
  height: 100%;
  background: rgba(0, 150, 255, 0.3);
  transform: translateX(-50%);
  transition: width 0.5s ease;
  z-index: 1;
}

.box-item:hover::before {
  width: 100%;
}

.box-item img,
.box-item h5,
.box-item p {
  position: relative;
  z-index: 2;
  transform: translateX(30px);
  opacity: 0;
  animation: slideInLeft 0.8s ease forwards;
}

/* 为不同的box-item设置不同的动画延迟，形成依次进入的效果 */
.box-item:nth-child(1) img {
  animation-delay: 0.1s;
}

.box-item:nth-child(1) h5 {
  animation-delay: 0.2s;
}

.box-item:nth-child(1) p {
  animation-delay: 0.3s;
}

.box-item:nth-child(3) img {
  animation-delay: 0.2s;
}

.box-item:nth-child(3) h5 {
  animation-delay: 0.3s;
}

.box-item:nth-child(3) p {
  animation-delay: 0.4s;
}

.box-item:nth-child(5) img {
  animation-delay: 0.3s;
}

.box-item:nth-child(5) h5 {
  animation-delay: 0.4s;
}

.box-item:nth-child(5) p {
  animation-delay: 0.5s;
}

.box-item:nth-child(7) img {
  animation-delay: 0.4s;
}

.box-item:nth-child(7) h5 {
  animation-delay: 0.5s;
}

.box-item:nth-child(7) p {
  animation-delay: 0.6s;
}

/* 线条的动画延迟 */
.line-white {
  transform: translateX(30px);
  opacity: 0;
  animation: slideInLeft 0.8s ease forwards;
}

.line-white:nth-child(2) {
  animation-delay: 0.15s;
}

.line-white:nth-child(4) {
  animation-delay: 0.25s;
}

.line-white:nth-child(6) {
  animation-delay: 0.35s;
}

.line-g {
  position: absolute;
  width: 1px;
  left: 0;
  height: 100px;
  background: linear-gradient(0deg, transparent, #fff, transparent);
  animation:
    linemove 2.5s infinite linear,
    slideInLeft 0.8s ease forwards;
}

@keyframes slideInLeft {
  from {
    transform: translateX(30px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}
.box_3 {
  background: #f8f8f8 url(../images/index/bg3.png) center/cover no-repeat;
}
.box-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}
.h2-box h2 {
  font-weight: bold;
  font-size: 55px;
  color: #073682;
  margin-bottom: 6px;
}
.h2-box span {
  font-size: 50px;
  color: #073682;
}
.contact-box {
  background-color: #073682;
  padding: 80px 0;
}

.contact-safe {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.contact-l {
  flex: 1;
  margin-right: 80px;
}

.cantact-r {
  flex: 1;
  padding-top: 92px;
}

.cantact-r h5 {
  font-size: 24px;
  color: #ffffff;
  margin-bottom: 30px;
  font-weight: bold;
}

.contact-form {
  width: 100%;
}

.form-group {
  margin-bottom: 16px;
}

.form-group:nth-child(3) {
  margin-bottom: 22px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: rgba(157, 164, 179, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid #ffffff;
  font-size: 16px;
  color: #ffffff;
  padding: 25px 16px;
  transition: all 0.3s ease;
}

.contact-form input {
  height: 71px;
}

.contact-form textarea {
  height: 155px;
  resize: none;
  line-height: 1.5;
}
.contact-l-s {
  display: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #fff;
}

/* 针对IE浏览器 */
input:-ms-input-placeholder {
  color: #ffffff;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.15);
}

.submit-btn {
  width: 261px;
  height: 65px;
  background: #073682;
  border: none;
  border-radius: 0;
  font-size: 18px;
  color: #ffffff;
  cursor: pointer;
  transition: all 0.3s ease;
}

.submit-btn:hover {
  background: #ffffff;
  color: #073682;
}