/* ====================== 字符集声明 ====================== */
@charset "UTF-8";

/* ====================== CSS变量定义 ====================== */
:root {
  /* 基础颜色 */
  --len-white: #fff;
  --len-white-op: rgba(255,255,255,0.2);
  --len-black: #000;
  --len-black-op: rgba(0,0,0,0.2);
  --len-none: #00001e00;
  --len-gray: #999999;
  --len-gray-op: #9999992b;
  --len-vip: #e5a80d;
  
  /* 主题派生变量 */
  --len-main: var(--len-theme);
  --len-main-op: var(--len-theme-op);
  --len-main-none: var(--len-theme-none);
  
  /* 阴影系统 */
  --len-shadow-theme: 0 8px 12px -3px var(--len-theme-op);
  --len-shadow-blackdeep: 0 2px 16px -3px rgba(0, 0, 0,.15);
  --len-shadow-main: 0 8px 12px -3px var(--len-main-op);
  --len-shadow-blue: 0 8px 12px -3px rgba(40, 109, 234,.20);
  --len-shadow-white: 0 8px 12px -3px rgba(255, 255, 255,.20);
  --len-shadow-black: 0 0 12px 4px rgba(0, 0, 0,.05);
  --len-shadow-yellow: 0px 38px 77px -26px rgba(255, 201, 62,.12);
  --len-shadow-red: 0 8px 12px -3px #ee7d7936;
  --len-shadow-green: 0 8px 12px -3px #87ee7936;
  
  /* 渐变效果 */
  --len-logo-color: linear-gradient(215deg,#4584ff 0%,#cf0db9 100%);
  
  /* 组件计时 */
  --len-snackbar-time: 5s;
  
  /* 边框系统 */
  --style-border: 1px solid var(--len-card-border);
  --style-border-always: 1px solid var(--len-card-border);
  --style-border-hover: 1px solid var(--len-main);
  --style-border-hover-always: 1px solid var(--len-main);
  --style-border-dashed: 1px dashed var(--len-theme-op);
  
  /* 主题色 */
  --len-theme: #4259ef;
  --len-theme-op: #4259ef23;
  --len-theme-op-deep: #4259efdd;
  --len-theme-op-light: #4259ef0d;
  --len-theme-none: #4259ef01;
  
  /* 扩展颜色 */
  --len-blue: #425AEF;
  --len-red: #d80020;
  --len-red-op: #d800201a;
  --len-red-op-deep: #d8002056;
  --len-pink: #FF7C7C;
  --len-green: #57bd6a;
  --len-green-op: #57bd6a1a;
  --len-green-op-deep: #57bd6a56;
  --len-yellow: #936900;
  --len-yellow-op: #d99c001a;
  --len-orange: #e38100;
  --len-purple: #7a60d2;
  
  /* 文字颜色 */
  --len-fontcolor: #363636;
  --len-secondtext: rgba(60, 60, 67, 0.6);
  --len-scrollbar: rgba(60, 60, 67, 0.4);
  
  /* 背景系统 */
  --len-background: #f7f9fe;
  --len-navbg: rgba(22, 22, 23, 0.91);
  --len-reverse: #000;
  --len-maskbg: rgba(255, 255, 255, 0.6);
  --len-maskbgdeep: rgba(255, 255, 255, 0.85);
  --len-ahoverbg: #F7F7FA;
  
  /* 卡片系统 */
  --len-card-btn-bg: #1C1C1F;
  --len-post-blockquote-bg: #fafcff;
  --len-post-tabs-bg: #f2f5f8;
  --len-secondbg: #F5F5F7;
  --len-card-bg: #fff;
  --len-card-bg-op: var(--len-black-op);
  --len-card-bg-none: rgba(255, 255, 255, 0);
  
  /* 导航动态变量 */
  --len-navbgs: #fff(0, 0, 0, 0.8);
  --len-card-bgs: #1c1c1f;
  --len-fontcolors: #fff;
  --len-whites: #333;
}

/* ====================== 全局基础样式 ====================== */
::selection {
  background: var(--len-fontcolor);
  color: var(--len-background);
}

/* ====================== 关键帧动画 ====================== */
@keyframes flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes showbanner {
  0% {
    top: 0;
    background: var(--len-theme)
  }
  30% {
    top: 60px
  }
  80% {
    background: var(--len-theme)
  }
  100% {
    background: var(--len-secondbg)
  }
}

@keyframes showbannertext {
  0%, 80% {
    color: var(--len-whites)
  }
  100% {
    color: var(--len-fontcolors)
  }
}

/* ====================== 主体布局 ====================== */
body {
  background: var(--len-background);
  display: flex;
  margin: auto;
  flex-direction: column;
  font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma,
    Arial, PingFang SC-Light, Microsoft YaHei;
  align-items: center;
}

body .need-padding {
  max-width: 1200px;
  width: 90%;
}

/* ====================== 通用元素样式 ====================== */
a {
  text-decoration:none;
  user-select:none;
  -webkit-user-drag: none;
}

span {
  user-select:none;
}

sup {
  font-size: 12px;
  background: var(--len-green);
  color: var(--len-whites);
  padding: 4px;
  border-radius: 4px;
  margin-left: 6px;
  white-space: nowrap;
  position: absolute;
  top: -4px;
}

sup.hot {
  background: var(--len-red);
}

img {
  user-select:none;
  -webkit-user-drag: none;
}

/* ====================== 导航系统 ====================== */
.nav {
  display: flex;
  width: 100%;
  top: 0;
  left: 0;
  position: fixed;
  justify-content: center;
  flex-direction: column;
  background: var(--len-navbgs);
  align-items: center;
  z-index: 1000;
  transition: all 1s cubic-bezier(0.4, 0, 0.2, 1) !important;
  backdrop-filter: blur(10px);
  will-change:color;
}

.nav.top {
  background: var(--len-navbgs) !important;
  color: var(--len-whites) !important;
}

.nav.top a.nav-item {
  color: var(--len-whites);
}

.nav-content {
  max-width: 1200px;
  width: 90%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  z-index: 2;
  transition: .3s ease-in-out;
}

.nav-banner {
  width: 100%;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 60px;
  left: 0;
  animation: 4s ease-in-out showbanner;
  z-index: 1;
  background: var(--len-secondbg);
}

.nav-banner a {
  font-size: 12px;
  transition: .3s ease-in-out;
  animation: 4s ease-in-out showbannertext;
  color: var(--len-fontcolors);
}

.nav-banner a:hover {
  color: var(--len-theme);
}

.nav-right .nav-menu {
  display: none;
}

a.site-logo {
  display: flex;
  align-items: center;
}

img.site-logo-img {
  width: 25px;
}

.menu-list {
  display: none;
}

.banner-img {
  width: 405px;
  max-width: 100%;
  animation: floating 4s ease-in-out infinite;
  pointer-events:none;
  object-fit:cover;
  transform: translate(0,  -7px);
}

a.right-stack {
  display: flex;
  justify-content: center;
  min-height: 400px;
}

.nav.top:not(.nav-scrolled) span.site-name {
  color: var(--len-whites) !important;
}

span.site-name {
  color: var(--len-whites);
  font-size: 14px;
  margin-left: 8px;
}

.nav.top span.site-name {
  color: var(--len-fontcolors);
}

a.nav-item {
  color: var(--len-whites);
  opacity: 0.8;
  transition: ease-in-out 0.3s;
  font-size: 14px;
  margin: 0 2px;
  padding: 4px 8px;
  border-radius: 16px;
}

/* 导航状态控制 */
.nav:not(.nav-scrolled) {
  background: rgba(255, 255, 255, 0.9) !important;
  backdrop-filter: blur(10px);
}
.nav:not(.nav-scrolled) a.nav-item,
.nav:not(.nav-scrolled) .site-name {
  color: #000000 !important;
  opacity: 0.9;
}

.nav.nav-scrolled {
  background: #00001EEE !important;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}
.nav.nav-scrolled a.nav-item,
.nav.nav-scrolled .site-name {
  transition: color 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
  color: #ffffff !important;
  opacity: 1;
}

a.nav-item:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.05);
  color: var(--len-fontcolors);
}

.nav.top a.nav-item:hover {
  background: var(--len-secondbg);
}

.nav-right {
  display: flex;
  align-items: center;
}

/* ====================== 首屏内容 ====================== */
.first-stack {
  display: flex;
  justify-content: space-between;
  margin-top: 180px;
  margin-bottom: 120px;
  align-items: center;
}

.title-group {
  display: flex;
  flex-direction: column;
  font-size: 68px;
  color: #00001e;
  font-weight: 700;
  font-family: system-ui;
  letter-spacing: 0;
  line-height: 75px;
}

span.discription-text {
  display: block;
  font-size: 28px;
  font-weight: 400;
  color: #00001e;
  line-height: 34px;
  margin-top: 28px;
  font-weight: bold;
}

span.subfont {
  color: #808080;
}

span.highlight {
  background-image: -webkit-linear-gradient(241deg, #ea6044 39%, #dc5083 50%, #9a6df7 67%, #3f8def 81%);
  background-image: linear-gradient(209deg, #ea6044 39%, #dc5083 50%, #9a6df7 67%, #3f8def 81%);
  -webkit-background-clip: text;
  background-clip: text;
  position: relative;
  color: transparent;
  background-size: 200% auto;
  animation: flow 6s linear infinite;
}

a.about-button {
  display: flex;
  padding: 0 36px;
  background: var(--len-card-btn-bg);
  color: var(--len-white);
  border-radius: 29px;
  box-shadow: 0px 12px 12px -9px rgba(0,0,0,0.29);
  margin-top: 64px;
  width: fit-content;
  transition: ease-in-out 0.3s;
  white-space: nowrap;
  align-items: center;
  justify-content: center;
  height: 48px;
}

a.about-button:hover {
  background: var(--len-main);
  box-shadow: 0px 12px 12px -9px rgba(5, 51, 137, 0.29);
}

/* ====================== 产品区块 ====================== */
.product-group {
  margin: 0;
  width: 100%;
}

h2.group-title {
  font-size: 32px;
  margin-bottom: 0;
}

.group-description {
  font-size: 14px;
  color: var(--len-secondtext);
}

.group-items {
  display: flex;
  margin-top: 60px;
  flex-direction: row;
  flex-wrap: wrap;
}

.group-item {
  display: flex;
  width: calc(100% / 3);
  margin-bottom: 60px;
}

a.group-item-icon {
  width: 100px;
  height: 100px;
}

img.group-item-icon-img {
  width: 100px;
  height: 100px;
  border-radius: 28px;
}

.group-info-button {
  display: flex;
  align-items: center;
}

span.linkbotton-tips {
  display: flex;
  margin-left: 10px;
  font-size: 12px;
  color: var(--len-secondtext);
}

.special-card span.linkbotton-tips {
  color: var(--len-white);
}

.group-info {
  display: flex;
  flex-direction: column;
}

.group-info-group {
  margin-left: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100px;
}

.group-info-group a.title {
  color: var(--len-fontcolor);
  font-size: 20px;
  line-height: 1;
  margin-bottom: 8px;
  width: fit-content;
  position: relative;
  font-weight: bold;
}

.group-info-group a.discription {
  color: var(--len-fontcolor);
  font-size: 14px;
  width: fit-content;
  max-width: 220px;
  word-break: break-all;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
}

a.linkbutton {
  padding: 6px 20px;
  display: flex;
  background: var(--len-blue);
  color: var(--len-white);
  font-size: 14px;
  border-radius: 21px;
  transition: ease-in-out 0.3s;
  width: fit-content;
  white-space: nowrap;
}

a.linkbutton:hover {
  filter: brightness(1.2);
}

a.linkbutton:active {
  filter: brightness(0.8);
}

/* ====================== 页脚系统 ====================== */
.footer {
  padding: 60px 0 60px 0;
  display: flex;
  justify-content: center;
  width: 100%;
  background: var(--len-secondbg);
  margin-top: 80px;
  align-items: center;
}

.footer .info {
  font-size: 12px;
  margin: 0 20px;
  opacity: 0.6;
  color: var(--len-fontcolor);
  transition: ease-in-out 0.3s;
  margin: 4px 0;
}

.footer a.info:hover {
  opacity: 1;
}

.footer .info-group .info:not(:first-child) {
  margin-left: 4px;
}

.footer-content {
  display: flex;
  flex-direction: column;
}

/* ====================== Banner系统 ====================== */
.product-banner {
  background-image: linear-gradient(180deg, #002a53 0%, #00001e 100%);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 94px 0 0 0;
  height: fit-content;
  margin: 40px 0;
  overflow: hidden;
  position: relative;
  min-height: 800px;
}

.banner-info {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-banner .tips {
  color: var(--len-vip);
  font-size: 14px;
}

.product-banner span.title {
  font-size: 56px;
  color: var(--len-white);
  font-weight: bold;
  text-align: center;
  line-height: 60px;
  margin-top: 12px;
}

span.punctuation {
  position: absolute;
}

.banner-discription-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0.8;
  margin: 24px 0 32px 0;
}

.product-banner span.description {
  font-size: 16px;
  color: var(--len-white);
  text-align: center;
}

.link-group {
  margin-bottom: 24px;
  display: flex;
  align-items: center;
}

a.primary-button {
  padding: 8px 26px;
  background: var(--len-white);
  color: var(--len-fontcolor);
  border-radius: 26px;
  transition: ease-in-out 0.3s;
  white-space: nowrap;
}

a.primary-button:hover {
  background: var(--len-black);
  color: var(--len-white);
}

a.second-link {
  color: var(--len-white);
  opacity: 0.6;
  font-size: 14px;
  margin-left: 12px;
  transition: ease-in-out 0.3s;
}

a.second-link:hover {
  opacity: 1;
}

.banner-pic {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  height: 400px;
  position: absolute;
  bottom: 100px;
}

.banner-pic-img {
  max-width: 968px;
  width: 100%;
  margin: auto;
}

.inline-word {
  word-break: keep-all;
  white-space: nowrap;
}

.first-stack-links {
  display: flex;
}

.about-button.social-button {
  margin-left: 8px;
  padding: 0 16px;
}

.about-button.social-button i {
  font-size: 20px;
  line-height: 1;
}

/* ====================== 特殊卡片 ====================== */
.special-card {
  background: #131202;
  width: 90%;
  border-radius: 30px;
  max-width: 1200px;
  position: relative;
  display: flex;
  overflow: hidden;
  height: 500px;
}

.special-card-left {
  padding: 54px 0 54px 75px;
  z-index: 1;
  width: 100%;
  position: relative;
}

.special-card-left .tips {
  font-size: 18px;
  font-weight: bold;
  color: var(--len-white);
}

.special-card-left .title {
  font-size: 40px;
  font-weight: bold;
  max-width: 400px;
  line-height: 1.2;
  margin-top: 8px;
  max-width: calc(100% - 700px);
  color: var(--len-white);
}

.special-card-left .discription {
  font-size: 16px;
  margin-top: 24px;
  opacity: 0.8;
  line-height: 1.2;
  max-width: calc(100% - 700px);
  color: var(--len-white);
}

.special-card-left .button-group {
  position: absolute;
  bottom: 56px;
  display: flex;
  align-items: center;
}

.special-card-right {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  display: flex;
  z-index: 0;
}

/* ====================== 作者信息卡片 ====================== */
.avatar-discription {
  display: flex;
  flex-direction: row;
  align-content: center;
  padding: 24px;
  background: var(--heo-card-bg);
  margin: 18px 5% 0;
  border-radius: 12px;
  line-height: 1.5;
  max-width: 1200px;
  border: var(--style-border-always);
  box-shadow: var(--heo-shadow-border);
  flex-wrap: wrap;
  justify-content: space-between;
  max-width: 1200px;
}

.avatar-discription-text {
  display: flex;
  font-size: 16px;
  text-align: left;
  width: calc(100% - 330px);
  padding: 20px 40px;
  border-radius: 12px;
  align-items: center;
  box-sizing: border-box;
}

.avatar-discription-text p {
  margin: 0;
}

.avatar-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-left: auto;
  padding: 10px;
}

span.avatar-name {
  display: flex;
  margin: 8px auto auto;
  font-size: 24px;
  opacity: 1;
  font-weight: 700;
}

.avatar-image {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: var(--len-shadow-lightblack);
  filter: drop-shadow(2px 4px 12px #ec625b2e);
}

.avatar-title {
  display: flex;
  margin: auto;
  font-size: 14px;
  opacity: .6;
  text-align: center;
  max-width: 200px;
}

/* ====================== 响应式设计 ====================== */
@media screen and (max-width: 1200px) {
  .group-item {
    width: 50%;
  }

  .special-card {
    display: none;
  }
}

@media screen and (max-width: 768px) {
  .first-stack {
    margin-bottom: 20px;
  }

  .left-Introduce {
    margin-bottom: 40px;
  }

  a.about-button {
    margin-top: 40px;
  }
  
  .group-items {
    margin-top: 30px;
  }

  body .need-padding {
    width: 80%;
  }

  .first-stack {
    flex-direction: column;
    margin-top: 120px;
  }

  .product-group {
    margin:  0px;
  }
  
  .group-item {
    width: 100%;
  }

  .footer {
    flex-direction: column;
    margin-top: 20px;
  }

  .footer .info {
    margin-bottom: 12px;
  }

  .show-menu .nav {
    background: var(--len-fontcolors);
  }

  .show-menu .nav-content {
    background: #00000000;
  }

  .nav-right .nav-item {
    display: none;
  }

  .nav-right .nav-menu {
    display: flex;
    color: var(--len-fontcolors);
    padding: 8px 0 8px 8px;
  }

  .nav-menu {
    fill: rgb(0, 0, 0);  /* 设置图标颜色为黑色 */
}
  .nav-scrolled .nav-menu {
    fill: rgb(0, 0, 0);  /* 设置图标颜色为白色 */
}
  .product-banner span.title {
    font-size: 40px;
    line-height: 46px;
  }

  .menu-list {
    display: flex;
    position: fixed;
    flex-direction: column;
    top: 60px;
    background: #00001EEE;
    width: 100%;
    height: 0%;
    z-index: 10;
    align-items: center;
    overflow: hidden;
    transition: ease-in-out 0.3s;
    opacity: 1;
  }

  .show-menu .menu-list {
    height: 100%;
    opacity: 1;
  }

  .menu-list a.nav-item {
    padding: 8px 8px;
    font-size: 16px;
    width: 90%;
    margin-left: 0;
    color: white;
  }

  .show-menu .menu-list a.nav-item {
    padding: 12px 8px;
  }
  
  .avatar-discription {
    flex-direction: column;
    margin: 18px 3% 0;
    padding: 16px;
  }

  .avatar-discription-text {
    width: 100%;
    padding: 15px 0;
    order: 2;
  }

  .avatar-info {
    order: 1;
    margin: 0 auto 20px;
    padding: 0;
  }

  .avatar-discription-text p {
    font-size: 14px;
  }

  .avatar-image {
    max-width: 120px;
  }

  .banner-pic {
    margin-top: 20px;
    height: 200px;
    bottom: 40px;
  }

  .product-banner {
    padding-top: 60px;
    min-height: 520px;
  }

  h2.group-title {
    margin: 0;
  }

  a.linkbutton {
    margin-left: 0px;
  }

  .banner-img {
    height: 100%;
  }

  .banner-pic-img {
    width: 100vw;
  }

  .nav-center {
    display: none;
  }
}

@media screen and (max-width: 375px) {
  .first-stack {
    margin-bottom: 20px;
  }

  .left-Introduce {
    margin-bottom: 40px;
  }

  a.about-button {
    margin-top: 40px;
  }
  
  .group-items {
    margin-top: 30px;
  }

  .group-item {
    flex-direction: row;
  }
  .group-info-group {
    margin-left: 20px;
    flex-direction: row;
    width: 100%;
    height: 45px;
  }

  .group-info-button {
    margin-top: 0px;
    flex-direction: column;
  }

  span.linkbotton-tips {
    margin-top: 4px;
  }

  .product-group {
    margin: 0;
  }

  img.group-item-icon-img,a.group-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  .product-banner {
    padding-top: 40px;
  }

  .banner-pic {
    margin-top: 0px;
    height: 150px;
  }

  h2.group-title {
    margin: 0;
  }

  a.linkbutton {
    margin-left: 8px;
  }

  .footer {
    margin-top: 20px;
  }

  .title-group .title {
    font-size: 35px;
    line-height: 1.2;
  }

  span.discription-text {
    font-size: 16px;
    line-height: 1.2;
  }

  a.about-button {
    padding: 0 24px;
  }

  .nav-center {
    display: none;
  }

  .avatar-discription {
    margin: 12px 2% 0;
    padding: 12px;
  }

  .avatar-discription-text {
    padding: 12px 0;
  }

  .avatar-name {
    font-size: 14px;
  }

  .avatar-title {
    font-size: 12px;
  }
}