:root {
      --blue: #3b70ff;
      --black: #262626;
      --text: #333;
      --muted: #999;
      --stage-width: 1920;
      --scale: min(1, calc(100vw / 1920));
    }

    .headline {
      position: relative !important;
      text-align: center !important;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    .progress {
      position: fixed;
      left: 0;
      top: 0;
      z-index: 100;
      height: 3px;
      width: 100%;
      transform: scaleX(0);
      transform-origin: left center;
      background: linear-gradient(90deg, #6832fb, #3b70ff, #58a6ff);
      box-shadow: 0 0 18px rgba(59, 112, 255, .35);
    }

    .viewport {
      width: 100%;
      overflow-x: hidden;
      background: #fff;
    }

    .stage {
      position: relative;
      width: 100vw;
      height: 2380px;
      margin: 0 auto;
      overflow: hidden;
      background: #fff;
      transform-origin: top center;
      animation: rise .9s cubic-bezier(.2, .8, .2, 1) both;
    }

    @media (max-width: 1919px) {
      .stage {
        margin-left: 0;
        transform: scale(var(--scale));
        transform-origin: top left;
        margin-bottom: calc(2573px * (var(--scale) - 1));
      }

      .viewport {
        min-height: calc(2573px * var(--scale));
        overflow-x: hidden;
      }
    }

    .abs {
      position: absolute;
    }

    .nav-bar {
      left: 0;
      top: 0;
      width: 1920px;
      height: 72px;
      background: #fff;
      z-index: 6;
    }

    .top-nav {
      left: 360px;
      top: 0;
      z-index: 7;
      height: 72px;
      display: flex;
      align-items: center;
      gap: 86px;
    }

    .top-nav button {
      position: relative;
      border: 0;
      background: transparent;
      padding: 0;
      color: #333;
      font: 400 18px/1 "Source Han Sans CN", "PingFang SC", sans-serif;
      cursor: pointer;
      transition: color .2s ease, transform .2s ease;
    }

    .top-nav button:first-child {
      color: var(--blue);
      font-weight: 500;
    }

    .top-nav button:first-child::after {
      content: "";
      position: absolute;
      left: 50%;
      top: 32px;
      width: 10px;
      height: 2px;
      margin-left: -5px;
      border-radius: 1px;
      background: var(--blue);
    }

    .top-nav button:hover {
      color: var(--blue);
      transform: translateY(-2px);
    }

    .hero {
      position: relative;
      /* left: 0;
      top: 0; */
      /* width: 1920px; */
      /* height: 640px; */
      width: 100vw;
      min-width: 1200px;
      overflow: hidden;
      /* background: #dceeff; */
      display: flex;
      justify-content: center;
      overflow: hidden;
    }

    .hero img {
      position: absolute;
      pointer-events: none;
      user-select: none;
    }

    .hero .mask {
      position: relative;
      /* left: 0;
      top: 0; */
      /* width: 1920px; */
      height: 640px;
      object-fit: cover;

      margin: 0 auto;
      display: block;
      max-width: 1920px;
      opacity: 0;
    }

    .hero .layer-a {
      left: 3px;
      top: 0;
      width: 1917px;
      height: 790px;
      object-fit: cover;
      opacity: .98;
    }

    .hero .layer-b {
      left: 0;
      top: -254px;
      width: 1920px;
      height: 1080px;
      object-fit: cover;
    }

    .hero .layer-c {
      left: 0;
      top: -222px;
      width: 1920px;
      height: 1080px;
      object-fit: cover;
    }

    .hero .layer-d {
      left: 50%;
      top: -92px;
      margin-left: -960px;
      width: 1920px;
      height: 822px;
      object-fit: contain;
      /* position: relative;
      height: 640px;
      object-fit: cover;

      margin: 0 auto;
      display: block;
      max-width: 1920px; */
    }

    .hero-title {
      left: 50%;
      transform: translateX(-50%);
      top: 195px;
      z-index: 2;
      font-weight: 700;
      white-space: nowrap;
    }

    .hero-title .main {
      font-size: 106px;
      letter-spacing: 10.6px;
      line-height: 1.1;
    }

    .hero-title .sub {
      margin-top: 16px;
      font-size: 69px;
      line-height: 1.1;
    }

    .hero-title .grad {
      font-size: 69px;
      line-height: 1.1;
      color: transparent;
      background: linear-gradient(102deg, #6832fb 1%, #3b70ff 98%);
      -webkit-background-clip: text;
      background-clip: text;
    }

    .section-title {
      font-size: 32px;
      font-weight: 500;
      line-height: 1;
      text-align: center;
      white-space: nowrap;
    }

    .news-wrapper {
      position: absolute;
      top: 680px;
      left: 50%;
      transform: translateX(-50%);
      width: 1200px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 26px;
    }

    .news-title {
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    .news-content {
      display: flex;
      align-items: stretch;
      width: 100%;
    }

    .news-featured a {
      display: flex;
      gap: 18px;
      text-decoration: none;
      color: inherit;
    }

    .news-img {
      width: 346px;
      height: 228px;
      border-radius: 16px;
      object-fit: cover;
      flex-shrink: 0;
    }

    .featured-info {
      width: 343px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .featured-title {
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: #333;
      font-size: 18px;
      font-weight: 500;
      line-height: 1.55;
    }

    .featured-desc {
      color: #999;
      font-size: 14px;
      line-height: 1.7;
    }

    .featured-meta {
      display: flex;
      justify-content: space-between;
      color: #999;
      font-size: 14px;
    }

    .divider {
      width: 1px;
      background: #e8e8e8;
      margin: 0 32px;
      flex-shrink: 0;
    }

    .news-list {
      width: 440px;
      display: grid;
      gap: 21px;
      font-size: 16px;
    }

    .news-row a {
      display: grid;
      grid-template-columns: 1fr 90px;
      align-items: center;
      gap: 30px;
      color: #333;
      cursor: pointer;
      transition: color .18s ease, transform .18s ease;
    }

    .news-row span {
      display: block;
      width: 302px;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      font-weight: 400;
      font-size: 16px;
      color: #333333;
      transition: all .3s;

      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      word-break: break-all;
    }

    .news-row span:last-child {
      width: fit-content;
      color: #999;
      flex-shrink: 0;
    }

    .news-row:hover span {
      color: var(--blue);
      transform: translateX(8px);
    }

    .more-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      width: 96px;
      height: 36px;
      border: 1px solid #555;
      border-radius: 8px;
      background: #fff;
      color: #333;
      font-size: 14px;
      cursor: pointer;
      transition: all .2s ease;
    }

    .more-btn:hover {
      border-color: var(--blue);
      color: var(--blue);
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(59, 112, 255, .16);
    }

    .news-more {
      position: static;
    }

    .news-more a {
      display: flex;
      align-items: center;
    }

    .system-bg {
      left: 0;
      top: 1092px;
      width: 100%;
      height: 715px;
      background: #f8fafd;
    }

    .edu-wrapper {
      position: absolute;
      top: 1142px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 53px;
      z-index: 2;
    }

    .system-title {
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    .edu-cards-container {
      display: flex;
      gap: 24px;
    }

    .edu-card {
      position: relative;
      width: 384px;
      height: 495px;
      transition: transform .22s ease, filter .22s ease;
      cursor: pointer;
    }

    .edu-card:hover {
      transform: translateY(-10px);
      filter: drop-shadow(0 20px 28px rgba(59, 112, 255, .15));
    }

    .edu-card .card-bg {
      width: 384px;
      height: 100%;
      display: block;
    }

    .edu-card h3 {
      position: absolute;
      left: 26px;
      top: 86px;
      margin: 0;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      font-size: 32px;
      font-weight: 500;
      letter-spacing: .64px;
    }

    .edu-card .icon-bg {
      position: absolute;
      left: 26px;
      top: 28px;
      width: 50px;
      height: 50px;
      border-radius: 10px;
    }

    .edu-card .icon {
      position: absolute;
      left: 34px;
      top: 36px;
      width: 34px;
      height: 34px;
      object-fit: contain;
    }

    .edu-card .view {
      position: absolute;
      right: 28px;
      top: 43px;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      font-size: 14px;
      color: #333;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .edu-card .view img {
      width: 16px;
      height: 16px;
    }

    .edu-list {
      position: absolute;
      left: 16px;
      top: 159px;
      display: grid;
      gap: 12px;
    }

    .edu-item {
      width: 352px;
      /* min-height: 72px; */
      padding: 12px;
      border-radius: 10px;
      background: rgba(255, 255, 255, .4);
      transition: background .18s ease, transform .18s ease;
    }

    .edu-item:hover {
      background: rgba(255, 255, 255, .72);
      transform: translateX(4px);
    }

    .edu-item strong {
      display: block;
      /* margin-bottom: 5px; */
      color: #000;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      font-size: 19px;
      font-weight: 500;
      letter-spacing: .38px;
    }

    .edu-item span {
      margin-top: 5px;
      display: block;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: #595959;
      font-size: 15px;
      letter-spacing: .3px;
    }

    .basic .icon-bg {
      background: linear-gradient(142deg, #99dfff 0%, #42c0f1 90%);
    }

    .higher .icon-bg {
      background: linear-gradient(142deg, #a5cfff 18%, #58a6ff 93%);
    }

    .social .icon-bg {
      background: linear-gradient(160deg, #c1c5ff 11%, #9e97ff 86%);
    }

    .partners-wrapper {
      position: absolute;
      top: 1857px;
      left: 50%;
      transform: translateX(-50%);
      width: 1200px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 40px;
    }

    .partner-title {
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    .partners {
      display: grid;
      grid-template-columns: repeat(4, 282px);
      gap: 24px;
    }

    .partner-card {
      position: relative;
      width: 282px;
      height: 192px;
      overflow: hidden;
      border: 1px solid #ededed;
      border-radius: 24px;
      background: #fafafa;
      transition: transform .22s ease, box-shadow .22s ease, height .22s ease;
      cursor: pointer;
    }

    .partner-card:hover {
      height: 240px;
      transform: translateY(-8px);
      box-shadow: 0 18px 34px rgba(22, 119, 253, .12);
    }

    .partner-head {
      height: 80px;
      background: #fff;
      border-radius: 24px 24px 0 0;
    }

    .partner-logo {
      position: absolute;
      left: 19px;
      top: 15px;
      width: 48px;
      height: 48px;
      object-fit: cover;
    }

    .partner-name {
      position: absolute;
      left: 83px;
      top: 24px;
      margin: 0;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: #333;
      font-size: 20px;
      font-weight: 500;
    }

    .partner-desc {
      position: absolute;
      left: 19px;
      top: 99px;
      width: 242px;
      margin: 0;
      font-family: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: #666;
      font-size: 16px;
      line-height: 1.55;
      display: -webkit-box;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
      text-overflow: ellipsis;
      word-break: break-all;
      overflow: hidden;
    }

    .partner-more {
      position: absolute;
      left: 0;
      bottom: 0;
      width: 282px;
      height: 48px;
      border: 0;
      background: rgba(22, 119, 253, .1);
      color: #333;
      font-size: 16px;
      cursor: pointer;
      opacity: 0;
      transition: opacity .22s ease;
    }

    .partner-card:hover .partner-more {
      opacity: 1;
    }

    .friend {
      left: 0;
      top: 2373px;
      width: 1920px;
      height: 128px;
      background: rgba(59, 112, 255, .1);
    }

    .friend h3 {
      left: 360px;
      top: 24px;
      margin: 0;
      font-size: 24px;
      font-weight: 700;
    }

    .friend a {
      position: absolute;
      top: 77px;
      color: #333;
      text-decoration: none;
      font-size: 18px;
      transition: color .18s ease;
    }

    .friend a:hover {
      color: var(--blue);
    }

    .footer {
      left: 0;
      top: 2501px;
      width: 1920px;
      height: 72px;
      background: #1f2229;
      color: #fff;
      font-size: 14px;
    }

    .footer span {
      position: absolute;
      top: 25px;
      opacity: .8;
      white-space: nowrap;
    }

    .footer .owner {
      left: 360px;
      opacity: 1;
    }

    .footer img {
      position: absolute;
      top: 28px;
      width: 16px;
      height: 16px;
      object-fit: cover;
    }

    .quick-nav {
      position: fixed;
      right: 24px;
      top: 50%;
      z-index: 80;
      display: grid;
      gap: 10px;
      transform: translateY(-50%);
    }

    .quick-nav button,
    .back-top {
      border: 1px solid rgba(59, 112, 255, .18);
      background: rgba(255, 255, 255, .86);
      color: #334155;
      box-shadow: 0 12px 30px rgba(43, 83, 160, .12);
      backdrop-filter: blur(14px);
      cursor: pointer;
      transition: all .18s ease;
    }

    .quick-nav button {
      min-width: 86px;
      border-radius: 999px;
      padding: 9px 14px;
      font-size: 13px;
    }

    .quick-nav button:hover,
    .quick-nav button.active,
    .back-top:hover {
      color: var(--blue);
      border-color: rgba(59, 112, 255, .5);
      transform: translateY(-2px);
    }

    .back-top {
      position: fixed;
      right: 24px;
      bottom: 28px;
      z-index: 80;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      font-size: 18px;
      opacity: 0;
      pointer-events: none;
      transform: translateY(12px);
    }

    .back-top.visible {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .toast {
      position: fixed;
      left: 50%;
      bottom: 34px;
      z-index: 120;
      padding: 12px 18px;
      border-radius: 999px;
      background: rgba(31, 34, 41, .92);
      color: #fff;
      font-size: 14px;
      opacity: 0;
      transform: translate(-50%, 20px);
      transition: all .22s ease;
      pointer-events: none;
    }

    .toast.show {
      opacity: 1;
      transform: translate(-50%, 0);
    }

    .ripple {
      position: fixed;
      z-index: 130;
      width: 16px;
      height: 16px;
      margin: -8px 0 0 -8px;
      border: 2px solid rgba(59, 112, 255, .65);
      border-radius: 50%;
      pointer-events: none;
      animation: ripple .6s ease-out forwards;
    }

    @media (max-width: 900px) {
      .quick-nav {
        left: 12px;
        right: 12px;
        top: auto;
        bottom: 14px;
        display: flex;
        overflow-x: auto;
        transform: none;
      }

      .quick-nav button {
        min-width: max-content;
      }

      .back-top {
        right: 14px;
        bottom: 72px;
      }
    }

    @media (prefers-reduced-motion: reduce) {

      *,
      *::before,
      *::after {
        animation-duration: 1ms !important;
        transition-duration: 1ms !important;
        scroll-behavior: auto !important;
      }
    }

    @keyframes pageIn {
      to {
        opacity: 1;
      }
    }

    @keyframes rise {
      from {
        opacity: .7;
        filter: blur(6px);
        transform: translateY(18px) scale(var(--scale, 1));
      }

      to {
        opacity: 1;
        filter: blur(0);
        transform: translateY(0) scale(var(--scale, 1));
      }
    }

    @keyframes ripple {
      to {
        opacity: 0;
        transform: scale(5);
      }
    }



    .fixed_right {
      position: fixed;
      bottom: 25px;
      right: 50%;
      margin-right: -800px;
      z-index: 99;
    }

    .fixed_right a {
      display: block;
    }

    .fixed_right a img {
      width: 160px;
    }

    @media screen and (max-width: 1590px) {
      .fixed_right {
        right: 0;
        margin-right: 0%;
      }
    }