:root {
      --primary-blue: #1890ff;
      --dark-blue: #1a1a1a;
      --light-blue: #f0f8ff;
      --text-gray: #747781;
      --border-gray: #e8e8e8;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      color: var(--dark-blue);
      background-color: #F9FBFF;
    }

    /* Header Styles */
    .header {
      background: white;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      padding: 10px;
    }

    section {
      margin-bottom: 100px;
      padding-top: 40px;
      scroll-margin-top: 90px;
    }

    .navbar-brand {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--dark-blue) !important;
      text-decoration: none;
      background-image: url(./images/logo.png);
      background-size: contain;
      background-repeat: no-repeat;
      background-position: center;
      width: 194px;
      height: 40px;
    }

    .navbar-nav {
      display: flex;
      justify-content: center;
      width: 100%;
    }

    .navbar-nav .nav-link {
      /* color: var(--text-gray) !important; */
      font-weight: 500;
      margin: 0 15px;
      transition: color 0.3s ease;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--primary-blue) !important;
    }

    .login-btns {
      width: 194px;
    }

    .btn-login {
      color: var(--text-gray);
      text-decoration: none;
      margin-right: 15px;
    }

    .btn {
      font-size: 0.8rem;
      background: transparent;
      border: 1px solid var(--primary-blue);
      color: var(--primary-blue);
      padding: 4px 12px;
      border-radius: 4px;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    .btn:hover {
      background: var(--primary-blue);
      color: white;
    }

    /* Mobile Menu */
    .navbar-toggler {
      border: none;
      padding: 4px 8px;
    }

    .navbar-toggler:focus {
      box-shadow: none;
    }

    /* Hero Section */
    .hero-section {
      padding-top: 100px;
      background: linear-gradient(180deg, rgba(205, 209, 255, 0.22) 3.37%, rgba(205, 221, 255, 0.5) 42.79%, #F9FBFF 100%);
    }

    .hero-content h1 {
      font-size: 3.8rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 20px;
      line-height: 1.2;
    }

    .hero-content p {
      font-size: 1.7rem;
      color: var(--text-gray);
      margin-bottom: 30px;
      line-height: 1.8;
    }

    .carousel-indicators {
      position: static;
      margin: 20px 0;
    }

    .carousel-indicators button {
      width: 30px;
      height: 4px;
      border-radius: 2px;
      border: none;
      background: #ddd;
      margin: 0 5px;
    }

    .carousel-indicators button.active {
      background: var(--primary-blue);
    }

    .cloud-box {
      width: 100%;
      height: 440px;
      /* height: 400px; */
      background-image: url(./images/cloud.png);
      background-size: 120%;
      background-repeat: no-repeat;
      background-position: center;
    }

    /* Advantage Box Styles */
    .advantage-box {
      margin-top: 60px;
      padding: 0 15px;
    }

    .advantages-container {
      display: flex;
      gap: 16px;
      overflow-x: auto;
      padding: 20px 0;
      scrollbar-width: none;
      /* Firefox */
      -ms-overflow-style: none;
      /* IE and Edge */
    }

    .advantages-container::-webkit-scrollbar {
      display: none;
      /* Chrome, Safari, Opera */
    }

    .advantage-item {
      flex: 0 0 auto;
      width: 340px;
    }

    .advantage-content {
      background: white;
      border-radius: 12px;
      padding: 20px;
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      transition: all 0.3s ease;
      background: linear-gradient(90deg, #FFFFFF 0%, #F2F6FF 100%);

      /* background-blend-mode: color-dodge; */
    }

    .advantage-content:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    }

    .advantage-text {
      flex: 1;
    }

    .advantage-text h3 {
      font-size: 1.2rem;
      font-weight: 600;
      color: var(--dark-blue);
      margin-bottom: 8px;
      line-height: 1.3;
    }

    .advantage-text p {
      font-size: 0.9rem;
      color: var(--text-gray);
      margin: 0;
      line-height: 1.4;
    }

    .advantage-icon {
      width: 100%;
      height: 100%;
      flex-shrink: 0;
      margin-left: 16px;
    }

    .advantage-icon img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* Advantages Section */
    .project-section {
      padding-top: 40px;
    }

    .project-header {
      color: var(--dark-blue);
      margin-bottom: 60px;
    }
    .project-header h2 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .project-header p {
      font-size: 1.3rem;
      color: var(--text-gray);
    }

    .project-card {
      background: white;
      border-radius: 4px;
      padding: 40px 10px;
      text-align: center;
      transition: all 0.3s ease;
      height: 100%;
    }

    .project-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    }

    .advantage-icon {
      width: 88px;
      height: 88px;
    }

    .project-card h3 {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--dark-blue);
    }

    .project-img {
      width: 140px;
      height: 140px;
      margin: 66px auto 28px;
    }
    .project-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* Company Section */
    .company-section {
      padding-top: 20px;
    }
    .company-wrapper {
      background: transparent;
      /* border-radius: 12px; */
      /* padding: 24px; */
      position: relative;
    }
    .company-image img {
      width: 100%;
      height: auto;
      display: block;
      /* border-radius: 8px; */
      object-fit: cover;
    }
    .company-content {
      color: var(--text-gray);
      line-height: 1.9;
      font-size: 1rem;
    }
    .company-content p + p {
      margin-top: 12px;
    }

    @media (min-width: 992px) {
      .company-content { font-size: 1.05rem; background: transparent;
        height: 380px;
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
      }
      /* .company-wrapper { padding: 32px; } */
      .company-image img { height: 420px; }
      /* Full-width white bar: top below image top; bottom aligned with image bottom */
      .company-wrapper::before {
        content: "";
        position: absolute;
        left: 49%;
        bottom: 0;
        transform: translateX(-50%);
        width: 100vw;
        height: calc(420px - 90px);
        background: #FFFFFF;
        z-index: 0;
      }
      .company-image, .company-content { position: relative; z-index: 1; }
    }

    @media (max-width: 991.98px) {
      /* .company-wrapper { padding: 16px; } */
      /* .company-image { margin-bottom: 12px; } */
      .company-image img { max-height: 320px; }
      .company-content { background: #FFFFFF; border-radius: 0; padding: 16px; }
    }


    /* Our Section (关于我们) */
    .our-section {
      padding: 40px 0 0 0;
      margin: 0;
      background: #EEF4FF;
      position: relative;
    }
    .our-list {
      overflow: hidden;
      border-bottom: 1px solid #D4DEF6;
      padding-bottom: 48px;
    }
    .our-list .container {
      display: flex;
      align-items: center;
      justify-content: space-between;

      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
    }
    .our-item {
      display: flex;
      flex-direction: row;
      align-items: center;
      justify-content: center;
      text-align: left;
      position: relative;
      min-height: 140px;
    }
    .our-icon {
      width: 120px;
      height: 120px;
      margin-right: 12px;
    }
    .our-icon img { width: 100%; height: 100%; object-fit: contain; }
.our-title { font-size: 1.1rem; font-weight: 600; color: var(--dark-blue); margin: 0 0 6px 0; }
    .our-desc { color: var(--text-gray); font-size: 0.95rem; }

    .our-links {
      display: flex;
      gap: 28px;
      justify-content: center;
      padding: 22px 0 10px;
    }
    .our-links a { color: var(--dark-blue); text-decoration: none; }
    .our-links a:hover { color: var(--primary-blue); }

    .our-footer {
      text-align: center;
      color: #6c7480;
      font-size: 0.88rem;
      padding: 12px 0 6px;
    }
    .our-footer .company-address { margin-bottom: 8px; }
    .copyright {
      color: #929293;
      text-align: center;
      padding: 24px 0;
      font-size: 12px;
      border-top: 1px solid #D4DEF6;
    }


  @media (max-width: 991.98px) {
    .our-list { display: flex;
      justify-content: space-between;
      border-radius: 8px;
      -webkit-overflow-scrolling: touch;
    }

    /* About bottom area: desktop with right logo, mobile stacked */
    .our-center {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 10px 0;
    }
    .our-center-left { flex: 1; }
    .brand-logo { width: 247px; height: 40px; object-fit: contain; }

    @media (min-width: 992px) {
      .our-footer { text-align: left; padding-top: 6px; }
      .our-links { justify-content: flex-start; }
    }

    @media (max-width: 991.98px) {
      .our-center { flex-direction: column; align-items: stretch; }
      .our-brand { order: 2; }
      .brand-logo { width: 140px; height: 36px; margin: 6px auto 0; }
      .our-footer { text-align: center; }
      .our-links { justify-content: center; }
    }
      .our-item { flex-direction: column; align-items: center; text-align: center; padding: 0; min-height: auto; flex: 0 0 auto; }
      .our-item:not(:last-child)::after { /* keep vertical separators inside horizontal scroller */
        top: 16px; bottom: 16px; right: 0; left: auto; width: 1px; height: auto;
      }
      .our-icon { width: 56px; height: 56px; margin: 0 0 8px 0; }
      .our-title { font-size: 1rem; }
      .our-desc { font-size: 0.9rem; }
      .our-links { flex-wrap: wrap; gap: 16px; font-size: 0.95rem; }
      .our-footer { font-size: 0.8rem; }
    }

    @media (min-width: 1400px) {
    .container, .container-lg, .container-md, .container-sm, .container-xl, .container-xxl {
        max-width: 1420px !important;
    }
  }

    /* Responsive Design */
    @media (min-width: 992px) {
      .advantages-container {
        justify-content: center;
        overflow-x: visible;
      }

      .advantage-item {
        flex: 1;
        max-width: 340px;
      }
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2rem;
        text-align: center;
      }

      .hero-content p {
        text-align: center;
        font-size: 1rem;
      }

      .cloud-box {
        height: 300px;
        margin-top: 30px;
      }

      .advantage-box {
        margin-top: 40px;
        padding: 0 10px;
      }

      .advantages-container {
        gap: 16px;
        padding: 15px 0;
        -webkit-overflow-scrolling: touch;
        /* iOS smooth scrolling */
      }

      .advantage-item {
        width: 260px;
      }

      .advantage-content {
        padding: 20px 16px;
      }

      .advantage-text h3 {
        font-size: 1.1rem;
      }

      .advantage-text p {
        font-size: 0.85rem;
      }
    }

    .cloud-platform {
      width: 250px;
      height: 250px;
    }

    .main-cloud {
      width: 100px;
      height: 65px;
    }

    .inner-cloud {
      width: 50px;
      height: 32px;
    }

    .platform {
      width: 160px;
      height: 16px;
    }

    .platform::before {
      width: 120px;
      height: 12px;
    }

    .floating-icon {
      width: 35px;
      height: 35px;
      font-size: 16px;
    }

    .project-card {
      margin-bottom: 20px;
    }

    /* .navbar-nav {
        padding: 20px;
      } */

    .navbar-nav .nav-link {
      /* margin: 10px 0; */
      text-align: center;
    }

    /* Function Section (开放能力) */
    .function-section {
      padding: 40px 0 20px;
    }

    .function-list {
      display: flex;
      gap: 0;
      /* background-color: #fff; */
      border-radius: 12px;
      overflow: hidden;
    }

    .function-item {
      background-color: #F5F8FF;
      overflow: hidden;
      transition: flex 0.4s ease, transform 0.3s ease, box-shadow 0.3s ease;
      flex: 1 1 0;
      border-right: 1px solid #DFDFDF;
      cursor: pointer;
      overflow: hidden;
    }

    .function-item:last-child { border-right: none; }

    .fi-header {
      width: 100%;
      background: transparent;
      border: none;
      outline: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 20px;
      cursor: pointer;
      justify-content: center;
    }

    .fi-title {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--dark-blue);
    }

    .fi-arrow {
      width: 24px;
      height: 24px;
      background-image: url(./images/collapse.png);
      background-repeat: no-repeat;
      background-size: contain;
      transition: transform 0.3s ease;
    }

    .function-item.active {
      border-right: none;
      background-color: #E0EAFE;
      background-image: url(./images/function-bg.png);
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
    }

    .function-item.active .fi-arrow {
      transform: rotate(180deg);
    }

    .function-item.active .fi-header {
      justify-content: flex-start;
    }

    .fi-panel {
      max-height: 0;
      opacity: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, opacity 0.35s ease, padding 0.35s ease;
      padding: 0 40px;
    }

    .function-item.active .fi-panel {
      max-height: 220px;
      opacity: 1;
      padding: 8px 20px 20px;
    }

    .fi-panel {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .fi-desc {
      flex: 1;
      color: var(--dark-blue);
      line-height: 1.7;
    }

    .fi-icon {
      width: 136px;
      height: 136px;
      flex-shrink: 0;
    }

    .fi-icon img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    /* 小图预览（仅 PC 折叠时显示） */
    .fi-peek { display: none; height: 136px; justify-content: center; align-items: center; }
    .fi-peek img { width: 88px; height: 88px; object-fit: contain; display: block; margin: 6px 20px 16px; }

    /* Desktop specific: horizontal accordion visual */
    @media (min-width: 992px) {
      .fi-arrow { display: none; }
      .function-item { box-shadow: none; border-radius: 0; }
      .function-item.active { flex: 2.2 1 0; }
      .function-item:not(.active) .fi-panel { display: none; }
      .function-item:not(.active) .fi-peek { display: flex; }
      .fi-header { padding: 40px 40px 0 40px;}
    }

    /* Responsive for mobile: vertical accordion */
    @media (max-width: 991.98px) {
      .function-list { display: block; border: 1px solid #D6E4FF; overflow: hidden; }
      .function-item {
        margin-bottom: 0;
        border: none;
        border-bottom: 1px solid #D6E4FF;
      }
      .function-item:last-child { border-bottom: none; }
      .fi-title {
        font-size: 1rem;
      }
      .fi-icon {
        width: 96px;
        height: 96px;
        margin: 10px auto 0;
      }
      .function-item.active .fi-panel {
        max-height: 600px;
      }
      .function-item .fi-header {
        justify-content: space-between !important;
      }
    }

    @media (max-width: 576px) {
      .hero-content h1 {
        font-size: 1.8rem;
      }

      .cloud-platform {
        width: 200px;
        height: 200px;
      }

      .main-cloud {
        width: 80px;
        height: 50px;
      }

      .inner-cloud {
        width: 40px;
        height: 25px;
      }
      .cloud-box {
        background-size: cover;
      }

      .project-header h2 {
        font-size: 1.4rem;
      }
      .project-img {
        margin: 30px auto 28px;
      }
    }

  /* Compact vertical spacing on mobile only */
  @media (max-width: 991.98px) {
    section { margin-bottom: 48px; padding-top: 24px; }
    .project-section { padding-top: 20px; }
    .project-header { margin-bottom: 28px; }
    .function-section { padding: 20px 0 10px; }
    .company-section { padding-top: 10px; }
    .our-section { padding: 24px 0 0 0; }
  }

  /* our-center overrides: desktop left/right with logo, mobile stacked; link separators */
  .our-center { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 64px 0; }
  .our-center .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
  .our-center-left { flex: 1 1 auto; }
  .our-center-right { flex: 0 0 auto; display: flex; align-items: center; justify-content: center; }
  .our-center .our-links { display: flex; align-items: center; flex-wrap: wrap; gap: 0; justify-content: flex-start; padding: 8px 0 6px; }
  .our-center .our-links a { padding: 0 12px; color: var(--dark-blue); text-decoration: none; line-height: 1; }
  .our-center .our-links a + a { border-left: 1px solid #CFE0FF; }
  .our-center .our-links a:hover { color: var(--primary-blue); }
  .our-center .our-footer { text-align: left; padding-top: 4px; }
  .our-center .brand-logo { width: 247px; height: 40px; object-fit: contain; display: block; }
    .company-address { margin: 10px 0;}


  /* Desktop: increase spacing between our-links items */
  @media (min-width: 992px) {
    .our-center .our-links a { padding: 0 70px; }
    .company-address {padding-left: 70px; margin-top: 48px;}
  }

  @media (max-width: 991.98px) {
    .our-center { flex-direction: column; align-items: stretch; text-align: center; gap: 16px; padding: 24px 0; }
    .our-center .container { flex-direction: column; align-items: center; gap: 12px; }
    .our-center .our-links { justify-content: center; }
    .our-center .our-footer { text-align: center; }
    .our-center-right { order: 2; }
    .our-center .brand-logo { width: 140px; height: 36px; margin: 6px auto 0; }
  }