:root {
      --primary: var(--djgd-cyan);
      --secondary: var(--djgd-purple);
      --accent: var(--djgd-danger);
      --dark: var(--djgd-bg);
      --panel: var(--djgd-surface-1);
      --panel-soft: var(--djgd-surface-2);
      --line: var(--djgd-line-cyan);
      --muted: var(--djgd-text-muted);
    }

    * {
      box-sizing: border-box;
      letter-spacing: 0;
    }

    html {
      scroll-behavior: smooth;
      background: var(--dark);
    }

    body {
      margin: 0;
      min-width: 320px;
      overflow-x: hidden;
      color: var(--djgd-text);
      background: transparent;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    a {
      color: inherit;
    }

    img {
      display: block;
      max-width: 100%;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      min-height: var(--djgd-header-height);
      height: var(--djgd-header-height);
      border-bottom: 1px solid var(--djgd-line);
      background: rgba(5, 8, 13, 0.92);
      backdrop-filter: blur(18px);
    }

    .header-inner,
    .page-shell {
      width: min(var(--djgd-shell), calc(100% - 64px));
      margin: 0 auto;
    }

    .header-inner {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand-link {
      display: inline-flex;
      align-items: center;
      min-width: 0;
      text-decoration: none;
    }

    .brand-link img {
      width: 166px;
      height: auto;
    }

    .back-link,
    .resource-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      border: 1px solid var(--djgd-line-cyan);
      border-radius: var(--djgd-radius-control);
      padding: 9px 14px;
      color: var(--djgd-text);
      background: rgba(32, 231, 242, 0.06);
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      transition: background-color 160ms ease, border-color 160ms ease;
    }

    .back-link:hover,
    .resource-link:hover {
      border-color: var(--primary);
      background: rgba(32, 231, 242, 0.12);
    }

    .intro {
      min-height: 420px;
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
      align-items: center;
      gap: 56px;
      padding: 56px 0 44px;
      border-bottom: 1px solid var(--line);
    }

    .eyebrow {
      margin: 0 0 14px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
    }

    h1,
    h2,
    h3 {
      margin-top: 0;
      font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    }

    h1 {
      max-width: 720px;
      margin-bottom: 18px;
      color: var(--djgd-text);
      font-size: clamp(2.5rem, 4.5vw, 4rem);
      line-height: 1.18;
      text-shadow: none;
    }

    .intro-copy {
      max-width: 680px;
      margin: 0;
      color: var(--djgd-text-muted);
      font-size: 17px;
      line-height: 1.8;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 26px 0 0;
      padding: 0;
      list-style: none;
    }

    .tag-list li {
      border: 1px solid rgba(124, 92, 255, 0.42);
      border-radius: 999px;
      padding: 7px 11px;
      color: #E7E7E7;
      background: rgba(124, 92, 255, 0.07);
      font-size: 13px;
      font-weight: 600;
    }

    .product-visual {
      align-self: center;
    }

    .product-visual img {
      width: 100%;
      max-height: 250px;
      object-fit: contain;
      filter: drop-shadow(0 18px 28px rgba(32, 231, 242, 0.12));
    }

    .product-caption {
      margin: 16px 0 0;
      color: var(--muted);
      text-align: center;
      font-size: 13px;
    }

    .mobile-index {
      display: none;
      position: sticky;
      top: 72px;
      z-index: 40;
      gap: 8px;
      overflow-x: auto;
      padding: 12px 20px;
      border-bottom: 1px solid var(--djgd-line);
      background: rgba(5, 8, 13, 0.97);
      scrollbar-width: none;
    }

    .mobile-index::-webkit-scrollbar {
      display: none;
    }

    .mobile-index a {
      flex: 0 0 auto;
      border: 1px solid var(--djgd-line);
      border-radius: 10px;
      padding: 8px 11px;
      color: var(--djgd-text-muted);
      text-decoration: none;
      font-size: 13px;
      font-weight: 600;
    }

    .tutorial-layout {
      width: min(var(--djgd-shell), calc(100% - 64px));
      display: grid;
      grid-template-columns: 220px minmax(0, 1fr);
      gap: 56px;
      padding: 52px 0 96px;
    }

    .desktop-index {
      align-self: start;
      position: sticky;
      top: 98px;
    }

    .index-title {
      margin: 0 0 15px;
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
    }

    .desktop-index ol {
      margin: 0;
      padding: 0;
      border-left: 1px solid var(--djgd-line);
      list-style: none;
    }

    .desktop-index a {
      display: block;
      margin-left: -1px;
      border-left: 2px solid transparent;
      padding: 8px 0 8px 16px;
      color: var(--djgd-text-subtle);
      text-decoration: none;
      font-size: 14px;
      line-height: 1.4;
      transition: color 160ms ease, border-color 160ms ease;
    }

    .desktop-index a:hover,
    .desktop-index a:focus-visible {
      border-left-color: var(--primary);
      color: var(--djgd-text);
    }

    .content-column {
      min-width: 0;
    }

    .anchor-section,
    .step {
      scroll-margin-top: 96px;
    }

    .anchor-section {
      margin-bottom: 64px;
    }

    .section-heading {
      margin-bottom: 20px;
      color: var(--djgd-text);
      font-size: 26px;
      line-height: 1.3;
    }

    .section-heading::after {
      content: "";
      display: block;
      width: 46px;
      height: 2px;
      margin-top: 13px;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(32, 231, 242, 0.55);
    }

    .prep-grid,
    .overview-grid,
    .verify-grid,
    .resources-grid {
      display: grid;
      gap: 16px;
    }

    .prep-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .info-panel {
      min-height: 136px;
      border: 1px solid var(--djgd-line);
      border-radius: var(--djgd-radius-card);
      padding: 22px;
      background: var(--panel);
    }

    .info-panel h3 {
      margin-bottom: 11px;
      color: var(--primary);
      font-size: 16px;
    }

    .info-panel p,
    .info-panel ul {
      margin: 0;
      color: var(--djgd-text-muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .info-panel ul {
      padding-left: 20px;
    }

    .text-link {
      color: var(--primary);
      font-weight: 600;
      text-underline-offset: 3px;
    }

    .overview-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
      counter-reset: overview;
    }

    .overview-item {
      position: relative;
      min-height: 112px;
      border-top: 2px solid rgba(124, 92, 255, 0.65);
      padding: 18px 16px 16px;
      border: 1px solid var(--djgd-line);
      border-top: 2px solid rgba(124, 92, 255, 0.65);
      border-radius: var(--djgd-radius-card);
      background: var(--panel);
      counter-increment: overview;
    }

    .overview-item::before {
      content: "0" counter(overview);
      display: block;
      margin-bottom: 9px;
      color: var(--secondary);
      font-size: 13px;
      font-weight: 700;
    }

    .overview-item strong {
      display: block;
      color: var(--djgd-text);
      font-size: 15px;
      line-height: 1.45;
    }

    .step {
      display: grid;
      grid-template-columns: 76px minmax(0, 1fr);
      gap: 28px;
      padding: 54px 0 64px;
      border-top: 1px solid var(--djgd-line);
    }

    .step-number {
      width: 58px;
      height: 58px;
      display: grid;
      place-items: center;
      border: 1px solid var(--primary);
      border-radius: var(--djgd-radius-control);
      color: var(--primary);
      background: rgba(32, 231, 242, 0.06);
      font-family: Montserrat, sans-serif;
      font-size: 21px;
      font-weight: 700;
      box-shadow: 0 0 12px rgba(32, 231, 242, 0.1);
    }

    .step h2 {
      margin-bottom: 14px;
      color: var(--djgd-text);
      font-size: 27px;
      line-height: 1.35;
    }

    .step-lead {
      margin: 0 0 22px;
      color: var(--djgd-text-muted);
      font-size: 16px;
      line-height: 1.8;
    }

    .step-points {
      margin: 0 0 24px;
      padding-left: 22px;
      color: var(--djgd-text-muted);
      font-size: 15px;
      line-height: 1.85;
    }

    .tip,
    .warning {
      margin: 20px 0 24px;
      border-left: 3px solid var(--primary);
      padding: 13px 16px;
      color: var(--djgd-text-muted);
      background: rgba(32, 231, 242, 0.06);
      font-size: 14px;
      line-height: 1.7;
    }

    .warning {
      border-left-color: var(--accent);
      background: rgba(255, 93, 115, 0.07);
    }

    .tip strong,
    .warning strong {
      color: var(--djgd-text);
    }

    .media-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      gap: 16px;
      margin: 28px 0 0;
    }

    .media-grid.two {
      grid-template-columns: minmax(0, 1fr);
    }

    .tutorial-figure {
      margin: 0;
      overflow: hidden;
      border: 1px solid var(--djgd-line-cyan);
      border-radius: var(--djgd-radius-card);
      background: var(--djgd-surface-1);
    }

    .tutorial-figure img {
      width: 100%;
      height: auto;
      object-fit: contain;
      background: var(--djgd-surface-1);
    }

    .tutorial-figure figcaption {
      border-top: 1px solid var(--djgd-line);
      padding: 11px 14px;
      color: var(--djgd-text-subtle);
      background: var(--panel);
      font-size: 13px;
      line-height: 1.5;
    }

    .device-photo {
      padding: 14px;
      border-color: rgba(32, 231, 242, 0.58);
      background: #30363B;
      box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1), 0 0 24px rgba(32, 231, 242, 0.12);
    }

    .device-photo img {
      border: 1px solid rgba(255, 255, 255, 0.42);
      filter: brightness(1.12) contrast(0.9) saturate(1.04);
    }

    .device-photo figcaption {
      margin: 14px -14px -14px;
    }

    .verify-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      margin-bottom: 24px;
    }

    .verify-item {
      display: flex;
      align-items: flex-start;
      gap: 11px;
      border-top: 2px solid rgba(32, 231, 242, 0.6);
      padding: 17px 15px;
      background: var(--panel);
      color: var(--djgd-text-muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .verify-item i {
      margin-top: 3px;
      color: var(--primary);
    }

    .troubleshooting-list {
      margin: 0;
      border-top: 1px solid var(--djgd-line);
    }

    .troubleshooting-item {
      display: grid;
      grid-template-columns: minmax(150px, 0.32fr) minmax(0, 1fr);
      gap: 28px;
      padding: 22px 0;
      border-bottom: 1px solid var(--djgd-line);
    }

    .troubleshooting-item dt {
      color: var(--djgd-text);
      font-weight: 700;
    }

    .troubleshooting-item dd {
      margin: 0;
      color: var(--djgd-text-muted);
      line-height: 1.75;
    }

    .resources-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .resource-link {
      min-height: 54px;
      justify-content: space-between;
      border-color: var(--djgd-line);
      padding: 13px 16px;
      background: var(--panel);
      text-align: left;
    }

    .resource-link i {
      flex: 0 0 auto;
      color: var(--primary);
    }

    .site-footer {
      border-top: 1px solid var(--djgd-line);
      padding: 28px 20px 34px;
      color: var(--djgd-text-subtle);
      background: var(--djgd-bg);
      text-align: center;
      font-size: 13px;
    }

    :focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 3px;
    }

    @media (max-width: 1023px) {
      .intro {
        grid-template-columns: minmax(0, 1.3fr) minmax(230px, 0.7fr);
        gap: 30px;
      }

      .mobile-index {
        display: flex;
      }

      .tutorial-layout {
        display: block;
        padding-top: 40px;
      }

      .desktop-index {
        display: none;
      }

      .anchor-section,
      .step {
        scroll-margin-top: 142px;
      }
    }

    @media (max-width: 767px) {
      .site-header {
        height: 68px;
      }

      .header-inner,
      .page-shell {
        width: min(100% - 40px, var(--djgd-shell));
      }

      .tutorial-layout {
        width: min(100% - 40px, var(--djgd-shell));
      }

      .brand-link img {
        width: 132px;
      }

      .back-link {
        min-width: 44px;
        width: 44px;
        padding: 9px;
      }

      .back-link span {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
      }

      .intro {
        min-height: 0;
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 38px 0 32px;
      }

      .eyebrow {
        margin-bottom: 11px;
      }

      h1 {
        margin-bottom: 14px;
        font-size: 31px;
      }

      .intro-copy {
        font-size: 15px;
        line-height: 1.75;
      }

      .tag-list {
        margin-top: 20px;
      }

      .product-visual img {
        max-height: 150px;
      }

      .mobile-index {
        top: 68px;
        padding: 10px 14px;
      }

      .tutorial-layout {
        padding: 34px 0 68px;
      }

      .anchor-section {
        margin-bottom: 52px;
      }

      .anchor-section,
      .step {
        scroll-margin-top: 126px;
      }

      .section-heading,
      .step h2 {
        font-size: 23px;
      }

      .prep-grid,
      .overview-grid,
      .verify-grid,
      .resources-grid,
      .media-grid.two {
        grid-template-columns: 1fr;
      }

      .overview-grid {
        gap: 10px;
      }

      .overview-item {
        min-height: 0;
      }

      .step {
        grid-template-columns: 48px minmax(0, 1fr);
        gap: 14px;
        padding: 42px 0 50px;
      }

      .step-number {
        width: 44px;
        height: 44px;
        font-size: 17px;
      }

      .step-lead {
        font-size: 15px;
      }

      .step-points {
        padding-left: 19px;
        font-size: 14px;
      }

      .media-grid {
        margin-top: 22px;
      }

      .device-photo {
        padding: 8px;
      }

      .device-photo figcaption {
        margin: 8px -8px -8px;
      }

      .troubleshooting-item {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 19px 0;
      }
    }

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

      *,
      *::before,
      *::after {
        transition-duration: 0.01ms !important;
      }
    }