.log{
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 600px;
    min-height: 400px;
    background-color: rgba(255, 255, 255, 0.7);
    overflow: hidden;
    border-radius: 10px;
    box-shadow:0 0 10px rgba(50, 59, 88, 0.8);
    backdrop-filter: blur(5px);
    position: relative;
    left: -30px;
}
.logtitle{
    font-size: 45px;
    font-weight: bolder;
    -webkit-background-clip: text;
    background-image: linear-gradient(90deg , rgba(98, 201, 248,0.6),rgba(243, 111, 255, 0.6),rgba(247, 129, 129, 0.6),rgba(241, 239, 104, 0.6),rgba(117, 226, 84, 0.6),rgba(98, 201, 248,0.6));
    background-size: 800%;
    animation: gradient 30s infinite linear;
    color: transparent;
    line-height: 100px;
   
   
}
@keyframes gradient{
    100%{
        background-position: -800% 0%;
    }
}
.top{
    width: 100vw;
    min-width: 1200px;
    height: 70px;
    background:rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(2px);
    border-bottom: 1px solid rgb(249, 254, 255);
    position: absolute;
    border-radius: 9px;
    box-shadow: 0 2px 3px rgba(0, 0, 0, 0.3);
    z-index            : 100;
    animation: topmove 1s;
}
.logo{
    width: 6vw;
    position: absolute;
    height: 70px;
    background-image: url("../image/paper.webp  ");
    background-repeat: no-repeat;
    background-position:50% 50% ;
    background-size: contain;
    filter: drop-shadow(0px 0px 20px black);
    z-index: 999999999;
    
}
.logo a{
    width: 6vw;
    height: 70px;
    display:block;
    cursor:hand;
}
.logotxt{
    width: 40vw;
    position: absolute;
    height: 70px;
    margin-left: 6vw;
    
   
}
nav {
    position        : relative;
    float: right;
    margin-right: 40px;
    width           : 590px;
    height          : 70px;
    border-radius   : 8px;
}
nav a {
    position   : relative;
    display    : block;
    float      : left;
    font-size  : 15px;
    line-height: 70px;

    height             : 70px;
    color              : #fff;
    text-transform     : uppercase;
    text-decoration    : none;
    text-align         : center;
    /* background-color: #00b894; */
    z-index            : 10;
}
nav a:nth-child(1) {
    width: 100px;
}

nav a:nth-child(2) {
    width: 110px;
}

nav a:nth-child(3) {
    width: 100px;
}

nav a:nth-child(4) {
    width: 160px;
}

nav a:nth-child(5) {
    width: 120px;
}

nav .animation {
    position        : absolute;
    height          : 100%;
    background-color: #F97F51;
    z-index         : 9;
    border-radius   : 8px;
    transition: all 0.3s;
}

.start-home,
nav a:nth-child(1):hover~.animation {
    width: 100px;
    left : 0px;
}
.start-works,
nav a:nth-child(2):hover~.animation {
    width: 110px;
    left : 100px;
}
.start-introduction,
nav a:nth-child(3):hover~.animation {
    width: 100px;
    left : 210px;
}
.start-people,
nav a:nth-child(4):hover~.animation {
    width: 160px;
    left : 310px;
}
.start-about,
nav a:nth-child(5):hover~.animation {
    width: 120px;
    left : 470px;
}
.home-botton{
   position: absolute;
    width: 100vw;
    height: 50px;
    line-height: 40px;
  
    bottom:0px;
   
   
    font-size: 20px;
    text-align         : center;
    z-index            : 0;
    color:azure;
    font-family     : 'Montserrat', sans-serif, Arial, 'Microsoft Yahei';
    z-index: 99999;
}

@keyframes topmove {
    from {
      top: -70px;
    }
  
    to {
      top: 0;
    }
  }
  
  @-webkit-keyframes topmove
 
  
    {
  
    from {
      top: -70px;
    }
  
    to {
      top:0;
    }
  
  }


  
.nav02 {
  position: fixed;
  display: flex;
  align-items: flex-start;
  /* border: 10px solid red; */
  animation: bj 1s ease;
  z-index: 99999999;
}

.nav_img {
  width: 30px;
 
}

.center > ul {
  position: fixed;
  right: 1%;
  top: 70%;
  z-index: 2;
}

.center > ul > li {
  position: relative;
  list-style: none;
  margin-top: 10px;
  text-align: center;
}

.center > ul > li > a {
  position: relative;
  width: 40px;
  margin-top: 15px;
  border-top: 10px;
  height: 40px;
  display: inline-block;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  color: #fff;
  font-size: 18px;
  border: 1px solid rgba(122, 160, 164, 0.53);
  /* 用阴影模拟立体 */
  box-shadow: 0px 3px 0px rgba(0, 0, 0, 0.1);
  /* 背景模糊 */
  backdrop-filter: blur(1px);
  /* 动画过渡 */
  transition: all 0.8s ease 0s;
  overflow: hidden;
  /* border: 1px solid red; */
  background-color: rgba(45, 54, 65, 0.317);
  animation: end 1.5s ease;
}


.center > ul > li > a:hover {
  /* 鼠标移入进行位移*/
  transform: translateY(-5px);
  background-color: rgba(126, 163, 209, 0.845);
}

.center > ul > li > a::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 30px;
  width: 45px;
  height: 150%;
  background-color: rgba(222, 243, 252, 0.557);
  /* 沿X轴45度横切，沿X轴右移150px */
  transform: skewX(45deg) translateX(130px);
  /* 动画过渡 */
  transition: all 1s;
}

.center > ul > li > a:hover::before {
  /* 沿X轴45度横切，沿X轴左移150px */
  transform: translateX(-150px);
}

.center > ul > li > a:active {
  transform: rotate(0deg);
}

/* 粗略的入场动画 */


@keyframes end {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  100% {
    transform: translateY(0%);
    opacity: 1;
  }
}

@keyframes bj {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}


nav2 {
    position: fixed;
    display: flex;
    align-items: flex-start;
    /* border: 10px solid red; */
    animation: bj 1s ease;
    z-index: 99999999;
  }
  
  .nav_img {
    width: 30px;
  }
  
  .center > ul {
    position: fixed;
    right: 1%;
    top: 70%;
    z-index: 2;
  }
  
  .center > ul > li {
    position: relative;
    list-style: none;
    margin-top: 10px;
    text-align: center;
  }
  
  .center > ul > li > a {
    position: relative;
    width: 40px;
    height: 40px;
    display: inline-block;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    color: #fff;
    font-size: 18px;
    border: 1px solid rgba(122, 160, 164, 0.53);
    /* 用阴影模拟立体 */
    box-shadow: 0 2px 3px rgb(0 0 0 / 10%);
    /* 背景模糊 */
    backdrop-filter: blur(1px);
    /* 动画过渡 */
    transition: all 0.8s ease 0s;
    overflow: hidden;
    /* border: 1px solid red; */
    background-color: rgba(45, 54, 65, 0.317);
    animation: end 1.5s ease;
  }
  
  
  .center > ul > li > a:hover {
    /* 鼠标移入进行位移*/
    transform: translateY(-5px);
    background-color: rgba(126, 163, 209, 0.845);
  }
  
  .center > ul > li > a::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 30px;
    width: 45px;
    height: 150%;
    background-color: rgba(222, 243, 252, 0.557);
    /* 沿X轴45度横切，沿X轴右移150px */
    transform: skewX(45deg) translateX(130px);
    /* 动画过渡 */
    transition: all 1s;
  }
  
  .center > ul > li > a:hover::before {
    /* 沿X轴45度横切，沿X轴左移150px */
    transform: translateX(-150px);
  }
  
  .center > ul > li > a:active {
    transform: rotate(0deg);
  }
  
  /* 粗略的入场动画 */
  
  
  @keyframes end {
    0% {
      transform: translateY(-100%);
      opacity: 0;
    }
    100% {
      transform: translateY(0%);
      opacity: 1;
    }
  }
  
  @keyframes bj {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }