:root {
      --ink: #071014;
      --panel: #0f1a20;
      --muted: #66727a;
      --text: #162127;
      --line: #dbe3e8;
      --paper: #f7fafc;
      --white: #ffffff;
      --cyan: #19d5ff;
      --green: #4ee58b;
      --pink: #f14dcb;
      --radius: 8px;
      --shadow: 0 24px 80px rgba(7, 16, 20, .18);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 84px;
    }

    body {
      margin: 0;
      background: var(--paper);
      color: var(--text);
      font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
      line-height: 1.6;
      letter-spacing: 0;
    }

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

    .site-header {
      position: fixed;
      z-index: 20;
      top: 0;
      left: 0;
      right: 0;
      border-bottom: 1px solid rgba(255, 255, 255, .16);
      background: rgba(7, 16, 20, .72);
      backdrop-filter: blur(16px);
    }

    .nav {
      width: min(1180px, calc(100% - 32px));
      height: 68px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      color: var(--white);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

    .brand-logo {
      width: 86px;
      height: auto;
      display: block;
      flex: 0 0 auto;
    }

    .brand-text {
      display: grid;
      gap: 0;
      min-width: 0;
    }

    .brand-text strong {
      font-size: 16px;
      line-height: 1.25;
      white-space: nowrap;
    }

    .brand-text span {
      color: rgba(255, 255, 255, .62);
      font-size: 11px;
      text-transform: uppercase;
      letter-spacing: 0;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
      color: rgba(255, 255, 255, .76);
      font-size: 14px;
      white-space: nowrap;
    }

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

    .hero {
      min-height: 92vh;
      position: relative;
      display: grid;
      align-items: center;
      overflow: hidden;
      background: var(--ink);
      color: var(--white);
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(7, 16, 20, .96) 0%, rgba(7, 16, 20, .82) 34%, rgba(7, 16, 20, .28) 68%, rgba(7, 16, 20, .08) 100%),
        linear-gradient(180deg, rgba(7, 16, 20, .2), rgba(7, 16, 20, .78));
      z-index: 1;
      pointer-events: none;
    }

    .hero img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
      padding: 116px 0 64px;
      display: grid;
      gap: 36px;
    }

    .hero-content {
      max-width: 650px;
      display: grid;
      gap: 22px;
    }

    .eyebrow {
      display: inline-flex;
      width: fit-content;
      align-items: center;
      gap: 10px;
      color: rgba(255, 255, 255, .78);
      font-size: 14px;
    }

    .eyebrow::before {
      content: "";
      width: 36px;
      height: 2px;
      background: linear-gradient(90deg, var(--cyan), var(--green), var(--pink));
    }

    h1, h2, h3, p {
      margin: 0;
    }

    h1 {
      max-width: 11em;
      font-size: clamp(34px, 5vw, 60px);
      line-height: 1.05;
      font-weight: 800;
    }

    .hero-copy {
      max-width: 560px;
      color: rgba(255, 255, 255, .76);
      font-size: 18px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border-radius: 6px;
      padding: 11px 18px;
      border: 1px solid rgba(255, 255, 255, .24);
      color: var(--white);
      font-weight: 700;
    }

    .btn-primary {
      border-color: rgba(25, 213, 255, .85);
      background: var(--cyan);
      color: #001920;
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 1px;
      max-width: 720px;
      border: 1px solid rgba(255, 255, 255, .16);
      background: rgba(255, 255, 255, .14);
      box-shadow: var(--shadow);
    }

    .metric {
      min-height: 104px;
      padding: 20px;
      background: rgba(7, 16, 20, .58);
      display: grid;
      align-content: center;
      gap: 6px;
    }

    .metric strong {
      font-size: 22px;
      line-height: 1.2;
    }

    .metric span {
      color: rgba(255, 255, 255, .62);
      font-size: 13px;
    }

    main {
      background: var(--paper);
    }

    .section {
      padding: 86px 0;
    }

    .section-inner {
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 32px;
    }

    .section-head h2 {
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.15;
      color: var(--ink);
    }

    .section-head p {
      max-width: 520px;
      color: var(--muted);
    }

    .capability-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .card {
      min-height: 236px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--white);
      padding: 24px;
      display: grid;
      align-content: start;
      gap: 16px;
    }

    .card:hover {
      border-color: rgba(25, 213, 255, .7);
      box-shadow: 0 18px 42px rgba(7, 16, 20, .08);
      transform: translateY(-2px);
    }

    .card-icon {
      width: 38px;
      height: 38px;
      border-radius: 7px;
      display: grid;
      place-items: center;
      background: #ecfbff;
      color: #007b94;
      font-weight: 900;
    }

    .card h3 {
      font-size: 20px;
      line-height: 1.3;
      color: var(--ink);
    }

    .card p {
      color: var(--muted);
      font-size: 15px;
    }

    .dark-band {
      background:
        linear-gradient(180deg, #071014, #0d171c);
      color: var(--white);
    }

    .dark-band .section-head h2 {
      color: var(--white);
    }

    .dark-band .section-head p {
      color: rgba(255, 255, 255, .62);
    }

    .process {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
      align-items: stretch;
    }

    .process-panel {
      border: 1px solid rgba(255, 255, 255, .14);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, .04);
      padding: 30px;
    }

    .tech-list {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .tech-item {
      min-height: 116px;
      border: 1px solid rgba(255, 255, 255, .14);
      border-radius: 7px;
      padding: 18px;
      display: grid;
      gap: 8px;
      background: rgba(255, 255, 255, .04);
    }

    .tech-item strong {
      color: var(--cyan);
      font-size: 17px;
    }

    .tech-item span,
    .process-panel p {
      color: rgba(255, 255, 255, .66);
      font-size: 15px;
    }

    .flow {
      display: grid;
      gap: 10px;
    }

    .flow-row {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .flow-row:last-child {
      border-bottom: 0;
    }

    .flow-num {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(25, 213, 255, .42);
      border-radius: 7px;
      color: var(--cyan);
      font-weight: 800;
    }

    .downloads {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .download-card {
      min-height: 210px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--white);
      padding: 22px;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 12px;
      position: relative;
      overflow: hidden;
    }

    .download-card::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--cyan), var(--green), var(--pink));
      opacity: .85;
    }

    .download-card strong {
      color: var(--ink);
      font-size: 20px;
      line-height: 1.3;
    }

    .download-card span {
      color: var(--muted);
      font-size: 14px;
    }

    .download-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      align-self: flex-start;
      width: fit-content;
      min-height: 40px;
      margin-top: auto;
      border: 1px solid #b8c8d0;
      border-radius: 6px;
      background: var(--white);
      padding: 8px 12px;
      color: #0c5463;
      font-style: normal;
      font-weight: 800;
      font-size: 14px;
      line-height: 1.2;
      cursor: pointer;
      touch-action: manipulation;
      user-select: none;
      -webkit-tap-highlight-color: transparent;
    }

    @media (hover: hover) and (pointer: fine) {
      .download-button:hover {
        border-color: #0c7187;
        background: #f3fbfd;
      }

      .download-card:hover {
        border-color: rgba(25, 213, 255, .7);
        box-shadow: 0 18px 42px rgba(7, 16, 20, .08);
      }
    }

    .download-label {
      width: fit-content;
      border: 1px solid #d8e6ec;
      border-radius: 999px;
      padding: 3px 9px;
      background: #f3fbfd;
    }

    .channels {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .channel-card {
      min-height: 174px;
      border: 1px solid rgba(255, 255, 255, .14);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, .05);
      padding: 20px;
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 18px;
      align-items: center;
    }

    .channel-card img {
      width: 112px;
      height: 112px;
      object-fit: cover;
      border-radius: 6px;
      background: var(--white);
      padding: 6px;
    }

    .channel-card h3 {
      color: var(--white);
      font-size: 20px;
      line-height: 1.3;
    }

    .channel-card p {
      color: rgba(255, 255, 255, .64);
      font-size: 15px;
      margin-top: 6px;
    }

    .shop-card {
      grid-template-columns: 1fr;
      align-content: center;
      background:
        linear-gradient(135deg, rgba(25, 213, 255, .14), rgba(78, 229, 139, .08)),
        rgba(255, 255, 255, .05);
    }

    .shop-link {
      width: fit-content;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-top: 16px;
      border: 1px solid rgba(25, 213, 255, .78);
      border-radius: 6px;
      padding: 9px 14px;
      color: var(--cyan);
      font-weight: 800;
    }

    .shop-link:hover {
      background: rgba(25, 213, 255, .1);
    }

    .contact-band {
      padding: 54px 0;
      background: var(--ink);
      color: var(--white);
    }

    .contact {
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
      display: grid;
      gap: 28px;
      justify-items: start;
    }

    .contact h2 {
      font-size: clamp(26px, 4vw, 42px);
      line-height: 1.15;
    }

    .contact p {
      color: rgba(255, 255, 255, .66);
      margin-top: 10px;
    }

    .contact-info {
      display: grid;
      gap: 8px;
      min-width: min(360px, 100%);
      color: rgba(255, 255, 255, .84);
    }

    .footer {
      padding: 22px 0;
      border-top: 1px solid rgba(255, 255, 255, .12);
      background: var(--ink);
      color: rgba(255, 255, 255, .52);
      font-size: 13px;
      text-align: center;
    }

    @media (max-width: 920px) {
      .hero::before {
        background:
          linear-gradient(90deg, rgba(7, 16, 20, .96) 0%, rgba(7, 16, 20, .82) 58%, rgba(7, 16, 20, .4) 100%),
          linear-gradient(180deg, rgba(7, 16, 20, .15), rgba(7, 16, 20, .88));
      }

      .capability-grid,
      .downloads,
      .tech-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

      .shop-card {
        grid-column: 1 / -1;
      }

      .process,
      .contact {
        grid-template-columns: 1fr;
      }

      .section-head {
        display: grid;
      }
    }

    @media (max-width: 560px) {
      .nav {
        height: auto;
        padding: 14px 0;
        align-items: flex-start;
      }

      .nav-links {
        display: none;
      }

      .hero {
        min-height: auto;
      }

      .hero-inner {
        padding-top: 110px;
      }

      .brand-text strong {
        font-size: 14px;
      }

      h1 {
        font-size: 38px;
      }

      .hero-copy {
        font-size: 16px;
      }

      .section {
        padding: 64px 0;
      }

      .card,
      .process-panel,
      .download-card,
      .channel-card {
        padding: 20px;
      }

      .hero-metrics,
      .capability-grid,
      .downloads,
      .channels,
      .tech-list,
      .process,
      .contact {
        grid-template-columns: 1fr;
      }

      .channel-card {
        grid-template-columns: 96px 1fr;
        gap: 14px;
      }

      .shop-card {
        grid-column: auto;
        grid-template-columns: 1fr;
      }

      .channel-card img {
        width: 96px;
        height: 96px;
      }
    }