:root {
      --primary: #1f4e79;
      --primary-light: #2f75b5;
      --accent: #ed7d31;
      --success: #70ad47;
      --danger: #c00000;
      --bg: #f4f7fb;
      --card: rgba(255, 255, 255, 0.88);
      --text: #1d2433;
      --muted: #667085;
      --border: rgba(31, 78, 121, 0.12);
      --shadow: 0 20px 60px rgba(16, 24, 40, 0.12);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      background: linear-gradient(180deg, #f7fbff 0%, var(--bg) 44%, #eef4fb 100%);
      color: var(--text);
      overflow-x: hidden;
    }

    main {
      overflow: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .nav {
      position: fixed;
      top: 18px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 99;
      width: min(1120px, calc(100% - 32px));
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-width: 0;
      padding: 12px 18px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(255, 255, 255, 0.8);
      border-radius: 999px;
      backdrop-filter: blur(18px);
      box-shadow: 0 10px 30px rgba(31, 78, 121, 0.12);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--primary);
      min-width: 0;
      white-space: nowrap;
    }

    .logo-mark {
      position: relative;
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      overflow: hidden;
      color: #fff;
      border-radius: 14px;
      background:
        radial-gradient(circle at 70% 22%, rgba(255, 255, 255, 0.45), transparent 24%),
        linear-gradient(145deg, #173b5e 0%, var(--primary) 44%, var(--primary-light) 100%);
      box-shadow: 0 12px 28px rgba(31, 78, 121, 0.28);
    }

    .logo-mark::before {
      content: "";
      position: absolute;
      inset: 7px;
      border: 1px solid rgba(255, 255, 255, 0.38);
      border-radius: 10px;
    }

    .logo-mark strong {
      position: relative;
      z-index: 1;
      font-size: 21px;
      line-height: 1;
      letter-spacing: 0;
      font-weight: 900;
    }

    .logo-spark {
      position: absolute;
      right: 8px;
      top: 8px;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 5px rgba(237, 125, 49, 0.18);
    }

    .brand-copy {
      display: grid;
      gap: 2px;
      line-height: 1.05;
    }

    .brand-copy strong {
      font-size: 17px;
      font-weight: 900;
      letter-spacing: 0;
    }

    .brand-copy span {
      font-size: 11px;
      font-weight: 800;
      color: var(--accent);
      letter-spacing: 0;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 14px;
      color: #344054;
    }

    .nav-links a:hover {
      color: var(--primary-light);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 18px;
      border: none;
      border-radius: 999px;
      font-weight: 700;
      cursor: pointer;
      min-height: 44px;
      max-width: 100%;
      white-space: nowrap;
      transition: 0.25s ease;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      box-shadow: 0 12px 30px rgba(31, 78, 121, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(31, 78, 121, 0.32);
    }

    .section {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
      padding: 90px 0;
    }

    .hero {
      min-height: 100vh;
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      align-items: center;
      gap: 42px;
      padding-top: 100px;
    }

    .hero > * {
      min-width: 0;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      margin-bottom: 22px;
      flex-wrap: wrap;
      border-radius: 999px;
      color: var(--primary);
      background: rgba(31, 78, 121, 0.08);
      border: 1px solid rgba(31, 78, 121, 0.12);
      font-size: 14px;
      font-weight: 700;
    }

    .hero h1 {
      font-size: clamp(38px, 6vw, 66px);
      line-height: 1.08;
      letter-spacing: 0;
      color: #132238;
      margin-bottom: 24px;
      overflow-wrap: anywhere;
    }

    .hero h1 span {
      color: var(--primary-light);
    }

    .hero p {
      max-width: 620px;
      color: var(--muted);
      font-size: 18px;
      line-height: 1.9;
      margin-bottom: 30px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.86);
      color: var(--primary);
      border: 1px solid var(--border);
    }

    .dashboard-shell {
      position: relative;
      background: linear-gradient(145deg, rgba(255,255,255,0.92), rgba(255,255,255,0.68));
      border: 1px solid rgba(255,255,255,0.9);
      border-radius: 32px;
      box-shadow: var(--shadow);
      padding: 18px;
      overflow: hidden;
      min-width: 0;
    }

    .dashboard-shell::before {
      content: "";
      position: absolute;
      inset: 0 0 auto;
      height: 4px;
      background: linear-gradient(90deg, var(--accent), var(--primary-light));
    }

    .browser-bar {
      height: 42px;
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 14px;
      border-radius: 20px 20px 12px 12px;
      background: #eef4fb;
    }

    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #b9c5d6;
    }

    .screen {
      margin-top: 14px;
      padding: 18px;
      border-radius: 24px;
      background: #0f2440;
      color: #fff;
      min-height: 460px;
      position: relative;
      overflow: hidden;
      min-width: 0;
    }

    .screen::after {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
      background-size: 36px 36px;
      mask-image: linear-gradient(to bottom, #000, transparent 86%);
    }

    .screen-inner {
      position: relative;
      z-index: 1;
    }

    .screen-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }

    .live {
      display: flex;
      align-items: center;
      gap: 8px;
      color: #b5ffca;
      font-size: 13px;
    }

    .pulse {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #44d46d;
      animation: pulse 1.4s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(68, 212, 109, 0.8); }
      100% { box-shadow: 0 0 0 14px rgba(68, 212, 109, 0); }
    }

    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
    }

    .kpi {
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.09);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .kpi small {
      color: rgba(255,255,255,0.68);
    }

    .kpi strong {
      display: block;
      margin-top: 8px;
      font-size: 30px;
    }

    .chart-card {
      margin-top: 14px;
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.09);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .bars {
      height: 140px;
      display: flex;
      align-items: end;
      gap: 10px;
      padding-top: 20px;
    }

    .bar {
      flex: 1;
      border-radius: 10px 10px 0 0;
      background: linear-gradient(to top, var(--primary-light), #6dd5ff);
      animation: grow 1.8s ease both;
    }

    .bar:nth-child(1) { height: 48%; animation-delay: .1s; }
    .bar:nth-child(2) { height: 72%; animation-delay: .2s; }
    .bar:nth-child(3) { height: 58%; animation-delay: .3s; }
    .bar:nth-child(4) { height: 86%; animation-delay: .4s; }
    .bar:nth-child(5) { height: 68%; animation-delay: .5s; }
    .bar:nth-child(6) { height: 92%; animation-delay: .6s; }

    @keyframes grow {
      from { transform: scaleY(0); transform-origin: bottom; opacity: .3; }
      to { transform: scaleY(1); opacity: 1; }
    }

    .title-block {
      text-align: center;
      margin-bottom: 46px;
    }

    .title-block h2 {
      font-size: clamp(28px, 4vw, 42px);
      color: #132238;
      margin-bottom: 14px;
    }

    .title-block p {
      color: var(--muted);
      font-size: 17px;
      line-height: 1.8;
    }

    .pain-grid, .module-grid, .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 20px;
    }

    .card {
      position: relative;
      padding: 24px;
      border-radius: 26px;
      background: var(--card);
      border: 1px solid rgba(255, 255, 255, 0.9);
      box-shadow: 0 12px 34px rgba(16, 24, 40, 0.08);
      backdrop-filter: blur(16px);
      transition: 0.3s ease;
      overflow: hidden;
      min-width: 0;
    }

    .card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow);
    }

    .icon {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 16px;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      font-size: 22px;
    }

    .card h3 {
      margin-bottom: 10px;
      font-size: 20px;
      color: #132238;
    }

    .card p, .card li {
      color: var(--muted);
      line-height: 1.8;
      font-size: 15px;
    }

    .flow-wrap {
      padding: 30px;
      border-radius: 32px;
      background: #fff;
      box-shadow: var(--shadow);
      overflow: hidden;
      min-width: 0;
    }

    .flow {
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 14px;
    }

    .step {
      min-height: 112px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border-radius: 22px;
      background: linear-gradient(180deg, #f7fbff, #eef6ff);
      border: 1px solid var(--border);
      text-align: center;
      font-weight: 700;
      color: var(--primary);
      min-width: 0;
      animation: float 4s ease-in-out infinite;
    }

    .step:nth-child(even) {
      animation-delay: .8s;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    .timeline {
      position: relative;
      display: grid;
      gap: 18px;
    }

    .timeline::before {
      content: "";
      position: absolute;
      left: 22px;
      top: 20px;
      bottom: 20px;
      width: 3px;
      background: linear-gradient(var(--primary-light), var(--accent));
      border-radius: 999px;
    }

    .timeline-item {
      position: relative;
      padding: 22px 24px 22px 68px;
      border-radius: 24px;
      background: #fff;
      box-shadow: 0 10px 28px rgba(16, 24, 40, 0.08);
    }

    .timeline-item::before {
      content: attr(data-num);
      position: absolute;
      left: 6px;
      top: 22px;
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #fff;
      background: var(--primary-light);
      font-weight: 800;
    }

    .pricing-card {
      padding: 30px;
    }

    .price {
      margin: 18px 0;
      font-size: 36px;
      color: var(--primary);
      font-weight: 900;
    }

    .pricing-card.featured {
      transform: scale(1.04);
      border: 2px solid rgba(237, 125, 49, 0.36);
    }

    .tag {
      display: inline-block;
      padding: 6px 10px;
      border-radius: 999px;
      color: var(--accent);
      background: rgba(237, 125, 49, 0.1);
      font-size: 13px;
      font-weight: 800;
    }

    .list {
      list-style: none;
      display: grid;
      gap: 9px;
      margin-top: 16px;
    }

    .list li::before {
      content: "✓";
      color: var(--success);
      font-weight: 900;
      margin-right: 8px;
    }

    .cta {
      text-align: center;
      padding: 70px 26px;
      border-radius: 36px;
      background: linear-gradient(135deg, #102a48, #1f4e79 60%, #2f75b5);
      color: #fff;
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
    }

    .cta::before {
      content: "";
      position: absolute;
      inset: 0 0 0 auto;
      width: 36%;
      background: linear-gradient(120deg, transparent, rgba(255,255,255,.12));
      transform: skewX(-16deg) translateX(22%);
    }

    .cta h2 {
      font-size: 42px;
      margin-bottom: 16px;
      overflow-wrap: anywhere;
    }

    .cta p {
      color: rgba(255,255,255,.78);
      font-size: 18px;
      margin-bottom: 26px;
    }

    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: 0.7s ease;
    }

    .reveal.show {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 920px) {
      .section {
        padding: 74px 0;
      }

      .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 118px;
      }

      .nav-links {
        display: none;
      }

      .pain-grid, .module-grid, .pricing-grid {
        grid-template-columns: 1fr;
      }

      .flow {
        grid-template-columns: repeat(2, 1fr);
      }

      .pricing-card.featured {
        transform: none;
      }
    }

    @media (max-width: 640px) {
      .nav {
        top: 10px;
        width: calc(100% - 20px);
        justify-content: flex-start;
        padding: 10px 12px;
        border-radius: 22px;
      }

      .brand {
        gap: 8px;
        font-size: 14px;
      }

      .logo-mark {
        width: 36px;
        height: 36px;
        border-radius: 12px;
      }

      .logo-mark strong {
        font-size: 18px;
      }

      .logo-spark {
        right: 7px;
        top: 7px;
        width: 6px;
        height: 6px;
      }

      .brand-copy strong {
        font-size: 15px;
      }

      .brand-copy span {
        font-size: 10px;
      }

      .nav > .btn {
        flex: 0 0 auto;
        margin-left: 8px;
        min-height: 38px;
        padding: 9px 12px;
        font-size: 13px;
      }

      .section {
        width: calc(100% - 24px);
        padding: 58px 0;
      }

      .hero {
        gap: 28px;
        padding-top: 94px;
      }

      .badge {
        border-radius: 18px;
        font-size: 13px;
        line-height: 1.6;
      }

      .hero h1 {
        font-size: clamp(28px, 8.6vw, 34px);
        line-height: 1.16;
      }

      .hero p {
        font-size: 16px;
        line-height: 1.75;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .dashboard-shell {
        padding: 10px;
        border-radius: 22px;
      }

      .browser-bar {
        height: 34px;
        border-radius: 16px 16px 10px 10px;
      }

      .screen {
        min-height: 360px;
        padding: 14px;
        border-radius: 18px;
      }

      .screen-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
      }

      .kpi {
        padding: 12px;
        border-radius: 14px;
      }

      .kpi strong {
        font-size: 24px;
      }

      .bars {
        height: 110px;
        gap: 8px;
      }

      .title-block {
        margin-bottom: 30px;
      }

      .title-block h2 {
        font-size: clamp(24px, 8vw, 32px);
      }

      .title-block p {
        font-size: 15px;
      }

      .card {
        padding: 20px;
        border-radius: 20px;
      }

      .flow-wrap {
        padding: 14px;
        border-radius: 22px;
      }

      .flow {
        gap: 10px;
      }

      .step {
        min-height: 96px;
        border-radius: 16px;
      }

      .timeline::before {
        left: 18px;
      }

      .timeline-item {
        padding: 20px 18px 20px 58px;
        border-radius: 18px;
      }

      .timeline-item::before {
        left: 2px;
      }

      .pricing-card {
        padding: 22px;
      }

      .price {
        font-size: 30px;
      }

      .cta {
        padding: 44px 18px;
        border-radius: 24px;
      }

      .cta h2 {
        font-size: 28px;
        line-height: 1.25;
      }

      .cta p {
        font-size: 16px;
        line-height: 1.7;
      }
    }

    @media (max-width: 420px) {
      .nav {
        gap: 10px;
      }

      .brand {
        font-size: 13px;
      }

      .brand-copy span {
        display: none;
      }

      .nav > .btn {
        padding-inline: 10px;
      }

      .flow {
        grid-template-columns: 1fr;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
      }
    }