:root {
      --bg: #030712;
      --bg-surface: #0b1329;
      --card-bg: rgba(17, 24, 39, 0.75);
      --card-border: rgba(56, 189, 248, 0.15);
      --text: #f8fafc;
      --muted: #94a3b8;
      --primary: #0ea5e9;
      --primary-glow: rgba(14, 165, 233, 0.4);
      --cyan: #38bdf8;
      --violet: #818cf8;
      --accent: #22d3ee;
      --line: rgba(255, 255, 255, 0.08);
      --shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
      --radius: 24px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background-color: var(--bg);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.15), transparent 45%),
        radial-gradient(circle at 85% 10%, rgba(129, 140, 248, 0.12), transparent 40%),
        radial-gradient(circle at 50% 90%, rgba(34, 211, 238, 0.08), transparent 50%),
        linear-gradient(to bottom, #030712, #080e1e);
      background-attachment: fixed;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: min(1200px, calc(100% - 48px));
      margin: 0 auto;
    }

    .nav {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      background: rgba(3, 7, 18, 0.82);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .nav-inner {
      min-height: 80px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 14px;
      font-weight: 800;
      letter-spacing: -0.5px;
      font-size: 18px;
    }

    .logo {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 8px 20px rgba(14, 165, 233, 0.4);
      color: #030712;
      font-weight: 900;
      font-size: 22px;
      transition: var(--transition);
    }

    .brand:hover .logo {
      transform: scale(1.05) rotate(5deg);
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 28px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 500;
    }

    .nav-links a {
      position: relative;
      transition: var(--transition);
      padding: 6px 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan);
      transition: width 0.3s ease;
      border-radius: 2px;
    }

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

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      padding: 10px 20px !important;
      border-radius: 999px !important;
      color: #030712 !important;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      font-weight: 700 !important;
      box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
      transition: var(--transition) !important;
    }

    .nav-cta::after {
      display: none !important;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
    }

    .hero {
      position: relative;
      padding: 100px 0 80px;
    }

    .hero::before {
      content: "";
      position: absolute;
      top: 10%;
      left: 5%;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(14, 165, 233, 0.2), transparent 70%);
      border-radius: 50%;
      filter: blur(40px);
      z-index: -1;
      animation: floatOrb 8s ease-in-out infinite alternate;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 64px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 8px 16px;
      border: 1px solid rgba(56, 189, 248, 0.3);
      border-radius: 999px;
      color: var(--cyan);
      background: rgba(56, 189, 248, 0.06);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      backdrop-filter: blur(10px);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--cyan);
      box-shadow: 0 0 12px var(--cyan);
    }

    h1 {
      margin: 0;
      font-size: clamp(38px, 5.5vw, 72px);
      line-height: 1.08;
      letter-spacing: -2px;
      font-weight: 900;
    }

    .gradient-text {
      background: linear-gradient(135deg, #ffffff 20%, var(--cyan) 60%, var(--violet) 100%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero p, .section-lead, .feature p, .download-card p, .guide-card p, .faq p, .case-card p, .developer-card p {
      color: var(--muted);
      line-height: 1.8;
      font-size: 16px;
    }

    .hero p {
      margin: 28px 0 0;
      max-width: 660px;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 36px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 54px;
      padding: 0 28px;
      border-radius: 16px;
      font-weight: 700;
      transition: var(--transition);
      border: 1px solid transparent;
      cursor: pointer;
      font-size: 15px;
    }

    .btn-primary {
      color: #030712;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 10px 30px rgba(14, 165, 233, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(14, 165, 233, 0.5);
    }

    .btn-secondary {
      color: var(--text);
      background: rgba(255, 255, 255, 0.05);
      border-color: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(10px);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(56, 189, 248, 0.4);
      transform: translateY(-3px);
    }

    .platform-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 36px;
    }

    .platform-strip span {
      padding: 8px 16px;
      border-radius: 999px;
      color: #e2e8f0;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
      font-weight: 500;
      transition: var(--transition);
    }

    .platform-strip span:hover {
      background: rgba(56, 189, 248, 0.1);
      border-color: rgba(56, 189, 248, 0.3);
      color: var(--cyan);
    }

    .phone-art {
      position: relative;
      min-height: 520px;
      display: grid;
      place-items: center;
    }

    .orb {
      position: absolute;
      border-radius: 50%;
      pointer-events: none;
    }

    .orb.one {
      width: 140px;
      height: 140px;
      right: 10px;
      top: 10px;
      background: linear-gradient(135deg, var(--violet), rgba(129, 140, 248, 0.2));
      filter: blur(30px);
    }

    .orb.two {
      width: 100px;
      height: 100px;
      left: 20px;
      bottom: 40px;
      background: linear-gradient(135deg, var(--cyan), rgba(14, 165, 233, 0.2));
      filter: blur(25px);
    }

    .device {
      width: min(340px, 100%);
      min-height: 480px;
      padding: 16px;
      border-radius: 38px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02));
      box-shadow: var(--shadow), 0 0 0 1px rgba(0,0,0,0.5);
      backdrop-filter: blur(25px);
      transform: rotate(3deg) perspective(1000px) rotateY(-5deg);
      transition: var(--transition);
    }

    .device:hover {
      transform: rotate(0deg) perspective(1000px) rotateY(0deg);
    }

    .screen {
      min-height: 448px;
      border-radius: 26px;
      background: 
        radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.25), transparent 40%),
        linear-gradient(180deg, #0f1c3f, #070e1e);
      padding: 20px;
      overflow: hidden;
      position: relative;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .screen-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
    }

    .screen-title {
      font-weight: 800;
      font-size: 15px;
      letter-spacing: -0.3px;
    }

    .dots {
      display: flex;
      gap: 6px;
    }

    .dots i {
      display: block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--cyan);
      opacity: 0.8;
    }

    .bubble {
      width: 88%;
      padding: 14px 16px;
      margin: 12px 0;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.06);
      color: #e2e8f0;
      line-height: 1.5;
      font-size: 13px;
      border: 1px solid rgba(255, 255, 255, 0.06);
      backdrop-filter: blur(5px);
    }

    .bubble.alt {
      margin-left: auto;
      background: linear-gradient(135deg, rgba(14, 165, 233, 0.6), rgba(56, 189, 248, 0.3));
      border-color: rgba(56, 189, 248, 0.3);
    }

    .paper-plane {
      position: absolute;
      right: 20px;
      bottom: 20px;
      width: 72px;
      height: 72px;
      border-radius: 22px;
      display: grid;
      place-items: center;
      color: #030712;
      font-size: 30px;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 12px 30px rgba(14, 165, 233, 0.4);
      transition: var(--transition);
    }

    .paper-plane:hover {
      transform: scale(1.1) rotate(10deg);
    }

    section {
      padding: 90px 0;
      position: relative;
    }

    .section-head {
      margin-bottom: 48px;
      max-width: 800px;
    }

    .section-kicker {
      display: inline-block;
      margin-bottom: 12px;
      color: var(--cyan);
      font-weight: 800;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      font-size: 12px;
    }

    h2 {
      margin: 0;
      font-size: clamp(30px, 4vw, 48px);
      letter-spacing: -1.2px;
      line-height: 1.15;
      font-weight: 800;
    }

    .section-lead {
      margin: 20px 0 0;
      max-width: 840px;
      font-size: 17px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .feature, .download-card, .guide-card, .faq, .case-card, .developer-card, .stat-card, .testimonial {
      position: relative;
      border: 1px solid var(--card-border);
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px 28px;
      box-shadow: var(--shadow);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      overflow: hidden;
      transition: var(--transition);
    }

    .feature:hover, .download-card:hover, .guide-card:hover, .faq:hover, .case-card:hover, .developer-card:hover, .stat-card:hover, .testimonial:hover {
      transform: translateY(-6px);
      border-color: rgba(56, 189, 248, 0.4);
      box-shadow: 0 25px 60px -12px rgba(14, 165, 233, 0.2);
    }

    .feature::after, .download-card::after, .developer-card::after {
      content: "";
      position: absolute;
      width: 140px;
      height: 140px;
      right: -50px;
      top: -50px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(56, 189, 248, 0.15), transparent 70%);
      pointer-events: none;
    }

    .icon {
      width: 60px;
      height: 60px;
      display: grid;
      place-items: center;
      border-radius: 18px;
      margin-bottom: 24px;
      color: #030712;
      font-size: 26px;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 10px 25px rgba(14, 165, 233, 0.3);
    }

    h3 {
      margin: 0 0 14px;
      font-size: 20px;
      letter-spacing: -0.4px;
      font-weight: 700;
    }

    .feature p, .download-card p, .guide-card p, .faq p, .case-card p, .developer-card p {
      margin: 0;
    }

    .downloads {
      background: linear-gradient(180deg, rgba(3, 7, 18, 0) 0%, rgba(11, 19, 41, 0.5) 50%, rgba(3, 7, 18, 0) 100%);
    }

    .download-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
    }

    .download-card {
      padding: 28px 22px;
      min-height: 250px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .download-card strong {
      display: block;
      font-size: 19px;
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }

    .download-card p {
      font-size: 14px;
      line-height: 1.7;
    }

    .download-card .tag {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-top: 20px;
      padding: 9px 16px;
      border-radius: 999px;
      color: #030712;
      font-size: 13px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 6px 20px rgba(14, 165, 233, 0.3);
      transition: var(--transition);
    }

    .download-card .tag:hover {
      transform: scale(1.05);
      box-shadow: 0 8px 25px rgba(14, 165, 233, 0.5);
    }

    .guide-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .guide-card {
      padding: 38px;
      background: linear-gradient(145deg, rgba(14, 165, 233, 0.08), rgba(17, 24, 39, 0.8));
    }

    .steps {
      margin: 28px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 16px;
    }

    .steps li {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      color: #cbd5e1;
      line-height: 1.75;
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      transition: var(--transition);
    }

    .steps li:hover {
      background: rgba(56, 189, 248, 0.05);
      border-color: rgba(56, 189, 248, 0.2);
    }

    .steps b {
      flex: 0 0 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: #030712;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      font-weight: 800;
      box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
    }

    .developer {
      position: relative;
    }

    .developer-layout {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 32px;
      align-items: stretch;
    }

    .code-panel {
      border-radius: var(--radius);
      border: 1px solid rgba(56, 189, 248, 0.25);
      background: #020617;
      padding: 32px;
      box-shadow: var(--shadow);
      min-height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }

    .code-panel::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--cyan), var(--violet));
    }

    .code-line {
      display: block;
      margin: 16px 0;
      color: #bae6fd;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      font-size: 15px;
      white-space: normal;
      word-break: break-word;
      line-height: 1.6;
    }

    .code-line em {
      color: var(--cyan);
      font-style: normal;
      font-weight: 700;
    }

    .developer-cards {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      min-height: 330px;
      padding: 0;
      display: flex;
      flex-direction: column;
    }

    .case-visual {
      height: 140px;
      background: 
        linear-gradient(135deg, rgba(56, 189, 248, 0.8), rgba(14, 165, 233, 0.3)),
        radial-gradient(circle at 80% 20%, rgba(129, 140, 248, 0.7), transparent 40%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      overflow: hidden;
    }

    .case-visual::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, transparent 60%, rgba(11, 19, 41, 0.9));
    }

    .case-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .stat-card {
      text-align: center;
      padding: 36px 20px;
    }

    .stat-card b {
      display: block;
      font-size: 42px;
      line-height: 1;
      background: linear-gradient(135deg, #ffffff, var(--cyan));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 14px;
      font-weight: 900;
    }

    .stat-card span {
      color: var(--muted);
      line-height: 1.7;
      font-size: 14px;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq {
      padding: 32px;
    }

    .faq h3 {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .faq h3::before {
      content: "Q";
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      flex: 0 0 38px;
      border-radius: 12px;
      color: #030712;
      font-size: 16px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--cyan), var(--primary));
      box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
    }

    .testimonials {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial p {
      margin: 0;
      color: #cbd5e1;
      line-height: 1.85;
      font-style: italic;
    }

    .testimonial strong {
      display: block;
      margin-top: 24px;
      color: #fff;
      font-weight: 700;
      font-style: normal;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .testimonial strong::before {
      content: "";
      width: 24px;
      height: 2px;
      background: var(--cyan);
    }

    .news-section {
      padding: 80px 0 100px;
      position: relative;
    }

    .news-section .news-box {
      width: min(1000px, 100%);
      margin: 0 auto;
      border: 1px solid rgba(56, 189, 248, 0.25);
      border-radius: 36px;
      background: linear-gradient(145deg, rgba(17, 24, 39, 0.8), rgba(3, 7, 18, 0.9));
      box-shadow: var(--shadow);
      padding: 42px;
      backdrop-filter: blur(20px);
    }

    .news-section .section-head {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .article-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 16px;
    }

    .article-list li {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 20px;
      width: 100%;
      padding: 20px 24px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.02);
      transition: var(--transition);
    }

    .article-list li:hover {
      transform: translateY(-3px);
      border-color: rgba(56, 189, 248, 0.4);
      background: rgba(14, 165, 233, 0.06);
      box-shadow: 0 10px 30px rgba(14, 165, 233, 0.15);
    }

    .article-list li a {
      display: block;
      min-width: 0;
      color: #f1f5f9;
      font-weight: 700;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      transition: var(--transition);
    }

    .article-list li a:hover {
      color: var(--cyan);
    }

    .article-list li .date {
      color: #94a3b8;
      font-size: 13px;
      white-space: nowrap;
      font-weight: 500;
    }

    footer {
      border-top: 1px solid var(--line);
      background: rgba(3, 7, 18, 0.9);
      padding: 40px 0;
      backdrop-filter: blur(10px);
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-weight: 800;
    }

    @keyframes floatOrb {
      0%, 100% {
        transform: translateY(0) scale(1);
      }
      50% {
        transform: translateY(-20px) scale(1.08);
      }
    }

    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .download-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .stats {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 980px) {
      .nav-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 16px 0;
        gap: 16px;
      }
      .nav-links {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 8px;
        justify-content: flex-start;
        gap: 20px;
      }
      .hero-grid, .developer-layout, .guide-wrap {
        grid-template-columns: 1fr;
      }
      .phone-art {
        min-height: 440px;
      }
      .cases-grid, .testimonials, .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 32px, 1200px);
      }
      .hero {
        padding: 60px 0 40px;
      }
      section {
        padding: 60px 0;
      }
      h1 {
        letter-spacing: -1.5px;
      }
      .hero p {
        font-size: 16px;
      }
      .device {
        transform: none;
        width: 100%;
      }
      .grid-4, .download-grid, .stats, .developer-cards {
        grid-template-columns: 1fr;
      }
      .feature, .download-card, .guide-card, .faq, .case-card, .developer-card, .testimonial {
        border-radius: 20px;
        padding: 24px;
      }
      .case-card {
        padding: 0;
      }
      .case-body {
        padding: 24px;
      }
      .news-section .news-box {
        padding: 24px;
        border-radius: 24px;
      }
      .article-list li {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
    }