:root {
      --ink: #161616;
      --ink-soft: rgba(22, 22, 22, 0.72);
      --line: rgba(22, 22, 22, 0.03);
      --line-strong: rgba(22, 22, 22, 0.03);
      --card-shadow: 0 4px 16px rgba(18, 18, 18, 0.07);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --content-width: 1200px;
      --page-gutter: 24px;
      --site-mark-size: 128px;
      --bg-accent-a: rgba(92, 164, 146, 0.17);
      --bg-accent-a-stop: 33%;
      --bg-accent-b: rgba(163, 197, 214, 0.14);
      --bg-accent-b-stop: 30%;
      --bg-base-top: #f3f6f0;
      --bg-base-mid: #e7efe6;
      --bg-base-mid-stop: 62%;
      --bg-base-bottom: #f7f8f1;
      /* 背景菱形格：repeating-linear-gradient 的周期含 1px 线宽 */
      --grid-stripe-period: 8px;
      --grid-line-thick: 1px;
      --grid-line-primary: rgba(38, 66, 58, 0.014);
      --grid-line-cross: rgba(38, 66, 58, 0.012);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      color: var(--ink);
      background:
        radial-gradient(circle at top left, var(--bg-accent-a), transparent var(--bg-accent-a-stop)),
        radial-gradient(circle at right 18%, var(--bg-accent-b), transparent var(--bg-accent-b-stop)),
        linear-gradient(180deg, var(--bg-base-top) 0%, var(--bg-base-mid) var(--bg-base-mid-stop), var(--bg-base-bottom) 100%);
      font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: 0;
      pointer-events: none;
      background-repeat: repeat;
      background-position: 0 0;
      background-image:
        repeating-linear-gradient(
          45deg,
          transparent 0,
          transparent calc(var(--grid-stripe-period) - var(--grid-line-thick)),
          var(--grid-line-primary) calc(var(--grid-stripe-period) - var(--grid-line-thick)),
          var(--grid-line-primary) var(--grid-stripe-period)
        ),
        repeating-linear-gradient(
          -45deg,
          transparent 0,
          transparent calc(var(--grid-stripe-period) - var(--grid-line-thick)),
          var(--grid-line-cross) calc(var(--grid-stripe-period) - var(--grid-line-thick)),
          var(--grid-line-cross) var(--grid-stripe-period)
        );
      mask-image: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.82) 28%,
        rgba(0, 0, 0, 0.82) 72%,
        rgba(0, 0, 0, 0.48) 100%
      );
      -webkit-mask-image: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.82) 28%,
        rgba(0, 0, 0, 0.82) 72%,
        rgba(0, 0, 0, 0.48) 100%
      );
    }

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

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

    .page-shell {
      position: relative;
      z-index: 1;
      width: min(calc(100% - 2 * var(--page-gutter)), var(--content-width));
      margin: 0 auto;
      padding: 40px 0 72px;
    }

    .site-lang-bar {
      position: relative;
      z-index: 8000;
      margin-top: 10px;
      max-width: 40rem;
      width: 100%;
    }

    .site-lang-line {
      margin: 0;
      max-width: none;
      font-size: 1.04rem;
      line-height: 1.8;
      color: var(--ink-soft);
      padding-inline: 2em;
    }

    .site-lang-lead {
      color: var(--ink-soft);
    }

    .site-lang-trigger {
      border: none;
      background: none;
      padding: 0;
      margin: 0;
      font: inherit;
      color: rgba(22, 22, 22, 0.88);
      cursor: pointer;
      text-decoration: underline;
      text-decoration-color: currentColor;
      text-underline-offset: 3px;
    }

    .site-lang-trigger:hover {
      color: var(--ink);
    }

    .site-lang-trigger:focus-visible {
      outline: 2px solid rgba(43, 124, 255, 0.45);
      outline-offset: 2px;
      border-radius: 2px;
    }

    .site-lang-menu[hidden] {
      display: none !important;
    }

    .site-lang-menu {
      z-index: 10;
      margin: 0;
      padding: 6px 0;
      min-width: 11em;
      border: 1px solid var(--line-strong);
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, 0.98);
      box-shadow:
        0 20px 56px rgba(18, 18, 18, 0.2),
        0 8px 24px rgba(18, 18, 18, 0.12),
        0 2px 6px rgba(18, 18, 18, 0.06);
    }

    .site-lang-item {
      display: block;
      width: 100%;
      margin: 0;
      padding: 8px 16px;
      border: none;
      background: transparent;
      font: inherit;
      font-size: 1.04rem;
      text-align: left;
      color: var(--ink);
      cursor: pointer;
      text-decoration: none;
    }

    .site-lang-item:hover,
    .site-lang-item:focus-visible {
      background: rgba(22, 22, 22, 0.06);
      outline: none;
    }

    .site-lang-item[aria-current="true"],
    .site-lang-item[aria-current="page"] {
      font-weight: 600;
    }

    .hero {
      position: relative;
      z-index: 8001;
      isolation: isolate;
      padding: 0 0 24px;
      border-bottom: 1px solid var(--line-strong);
    }

    .hero::after {
      content: "";
      position: absolute;
      z-index: -1;
      inset: auto 0 0 auto;
      width: min(42vw, 420px);
      height: min(42vw, 420px);
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0) 72%);
      opacity: 0.85;
      filter: blur(10px);
      pointer-events: none;
    }

    .hero-title {
      margin: 0;
      font-family: "Iowan Old Style", "Baskerville", "Songti SC", "STSong", serif;
      font-size: clamp(3rem, 7vw, 6.4rem);
      line-height: 0.96;
      letter-spacing: -0.04em;
      font-weight: 600;
    }

    .hero-logo {
      width: min(100%, 320px);
      height: auto;
      object-fit: contain;
      filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.08));
    }

    .hero-brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: clamp(12px, 3vw, 28px);
    }

    .hero-brand-row .hero-title {
      flex: 1;
      min-width: 0;
    }

    .site-corner-icon {
      flex-shrink: 0;
      width: var(--site-mark-size);
      max-width: none;
      height: auto;
      pointer-events: none;
      margin: 0 20px 0 0;
      padding: 0;
      border: none;
      border-radius: 0;
      outline: none;
      background: none;
      box-shadow: none;
      filter: none;
    }

    .hero-copy {
      max-width: 80rem;
      margin: 20px 0 0;
      padding-inline: 2em;
      font-size: 1.04rem;
      line-height: 1.8;
      color: var(--ink-soft);
    }

    main {
      padding-top: 0;
    }

    .localized-content > main {
      position: relative;
      z-index: 0;
    }

    .section-row {
      display: grid;
      grid-template-columns: 180px minmax(0, 1fr);
      gap: 26px;
      align-items: start;
      padding: 20px;
      border-bottom: 1px solid var(--line);
    }

    .section-meta {
      position: sticky;
      top: 20px;
    }

    .section-title {
      margin: 0;
      font-family: "Iowan Old Style", "Baskerville", "Songti SC", "STSong", serif;
      font-size: 1.95rem;
      line-height: 1.06;
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 20px;
    }

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

    .project-card,
    .featured-card {
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(22, 22, 22, 0.09);
      border-radius: var(--radius-xl);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.78)),
        linear-gradient(135deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0));
      box-shadow: var(--card-shadow);
      transition: box-shadow 180ms ease, border-color 180ms ease;
    }

    .project-card:hover,
    .featured-card:hover {
      box-shadow: 0 24px 56px rgba(18, 18, 18, 0.1);
      border-color: rgba(22, 22, 22, 0.16);
    }

    .project-card {
      padding: 28px 28px 26px;
      display: flex;
      flex-direction: column;
      min-height: 100%;
    }

    .project-card > .card-copy {
      flex-grow: 1;
      flex-shrink: 0;
    }

    .featured-card {
      display: grid;
      grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.72fr);
      gap: 20px;
      padding: 30px;
    }

    .featured-main,
    .featured-side {
      position: relative;
      z-index: 1;
    }

    .featured-main {
      z-index: 2;
    }

    .featured-side {
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .project-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 22px;
    }

    .brand-lockup {
      display: flex;
      align-items: center;
      gap: 16px;
      min-width: 0;
    }

    .brand-icon {
      width: 64px;
      height: 64px;
      border-radius: 18px;
      overflow: hidden;
      flex: 0 0 auto;
      border: 1px solid rgba(22, 22, 22, 0.1);
      background: rgba(255, 255, 255, 0.88);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
    }

    .featured-card .brand-icon {
      width: 74px;
      height: 74px;
      border-radius: 22px;
    }

    .brand-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .brand-meta {
      min-width: 0;
    }

    .eyebrow {
      margin: 0 0 6px;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: rgba(22, 22, 22, 0.46);
    }

    .card-title {
      margin: 0;
      font-size: 1.34rem;
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .featured-card .card-title {
      font-size: 1.64rem;
    }

    .card-copy {
      margin: 0 0 22px;
      line-height: 1.8;
      color: var(--ink-soft);
    }

    .featured-card .card-copy {
      margin-top: 14px;
    }

    .card-copy a.card-copy-inline-link {
      color: inherit;
      font: inherit;
      text-decoration: underline;
      text-decoration-color: currentColor;
      text-underline-offset: 2px;
    }

    .card-copy a.card-copy-inline-link:hover {
      color: var(--ink);
    }

    .card-copy a.card-copy-inline-link:focus-visible {
      outline: 2px solid rgba(43, 124, 255, 0.45);
      outline-offset: 2px;
      border-radius: 2px;
    }

    .card-preview {
      margin: 0 0 20px;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(22, 22, 22, 0.08);
      background: rgba(255, 255, 255, 0.55);
      box-shadow: 0 8px 24px rgba(18, 18, 18, 0.06);
    }

    .card-preview img {
      width: 100%;
      height: auto;
    }

    button.card-preview-trigger {
      display: block;
      width: 100%;
      margin: 0;
      padding: 0;
      border: none;
      background: transparent;
      font: inherit;
      cursor: zoom-in;
      -webkit-tap-highlight-color: transparent;
    }

    button.card-preview-trigger:focus-visible {
      outline: 2px solid rgba(43, 124, 255, 0.5);
      outline-offset: 3px;
    }

    .card-preview-dual {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin: 0 0 20px;
    }

    .card-preview-dual .card-preview {
      margin-bottom: 0;
    }

    .card-preview-triple {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin: 0 0 20px;
    }

    .card-preview-triple .card-preview {
      margin-bottom: 0;
    }

    .featured-side-preview {
      margin: 0;
      width: 100%;
      max-width: 100%;
      flex: 0 1 auto;
    }

    .featured-side-preview img {
      width: 100%;
      height: auto;
      object-fit: contain;
    }

    .download-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .sys-icon {
      width: 16px;
      height: 16px;
      fill: currentColor;
      flex: 0 0 auto;
    }

    button.download-button {
      appearance: none;
      -webkit-appearance: none;
      font: inherit;
      cursor: pointer;
      text-align: center;
    }

    .download-button {
      position: relative;
      z-index: 1;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      padding: 11px 16px;
      border-radius: 999px;
      border: 1px solid rgba(22, 22, 22, 0.12);
      background: rgba(22, 22, 22, 0.94);
      color: #fbfbfb;
      font-size: 0.95rem;
      font-weight: 600;
      transition: transform 180ms ease, background-color 180ms ease;
    }

    .download-button:hover {
      transform: translateY(-1px);
      background: #111111;
    }

    .download-button.secondary {
      background: rgba(255, 255, 255, 0.8);
      color: var(--ink);
    }

    .download-button.secondary:hover {
      background: rgba(255, 255, 255, 0.94);
    }

    .download-button.static {
      cursor: default;
    }

    .download-button.static:hover {
      transform: none;
      background: rgba(255, 255, 255, 0.8);
    }

    .store-note {
      margin: 14px 0 0;
      font-size: 0.88rem;
      line-height: 1.7;
      color: rgba(22, 22, 22, 0.58);
    }

    .qr-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      width: 100%;
      padding: 18px;
      border: 1px solid rgba(22, 22, 22, 0.08);
      border-radius: 24px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.64)),
        linear-gradient(135deg, rgba(31, 191, 168, 0.12), rgba(112, 92, 255, 0.08));
    }

    .qr-panel img {
      width: 160px;
      max-width: 100%;
      height: auto;
      align-self: center;
      border-radius: 20px;
      border: 1px solid rgba(22, 22, 22, 0.08);
      background: #ffffff;
    }

    .qr-title {
      margin: 0 0 8px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: rgba(22, 22, 22, 0.46);
    }

    .qr-copy {
      margin: 0;
      line-height: 1.7;
      color: var(--ink-soft);
    }

    .mini-program-layer {
      position: fixed;
      inset: 0;
      z-index: 2000;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
      background: rgba(22, 22, 22, 0.42);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
    }

    .mini-program-layer[hidden] {
      display: none !important;
    }

    .mini-program-panel {
      position: relative;
      width: 100%;
      max-width: 360px;
      padding: 22px 22px 20px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--line-strong);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.9));
      box-shadow: 0 28px 80px rgba(18, 18, 18, 0.22);
    }

    .mini-program-panel .qr-panel {
      width: 100%;
      margin: 0;
      box-shadow: none;
      border: none;
      border-radius: var(--radius-lg);
      justify-content: flex-start;
      gap: 20px;
    }

    .mini-program-close {
      position: absolute;
      top: 12px;
      right: 12px;
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      border: none;
      border-radius: 999px;
      background: rgba(22, 22, 22, 0.06);
      color: rgba(22, 22, 22, 0.72);
      font-size: 1.35rem;
      line-height: 1;
      cursor: pointer;
      transition: background-color 160ms ease, color 160ms ease;
    }

    .mini-program-close:hover {
      background: rgba(22, 22, 22, 0.1);
      color: var(--ink);
    }

    .image-lightbox-layer {
      position: fixed;
      inset: 0;
      z-index: 2200;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 56px 20px 24px;
      background: rgba(14, 14, 14, 0.88);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
    }

    .image-lightbox-layer[hidden] {
      display: none !important;
    }

    .image-lightbox-img {
      max-width: min(100%, 1400px);
      max-height: min(90vh, 100%);
      width: auto;
      height: auto;
      object-fit: contain;
      border-radius: var(--radius-md);
      box-shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
    }

    .image-lightbox-close {
      position: absolute;
      top: 16px;
      right: 16px;
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      border: none;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.12);
      color: rgba(255, 255, 255, 0.92);
      font-size: 1.5rem;
      line-height: 1;
      cursor: pointer;
      transition: background-color 160ms ease, color 160ms ease;
    }

    .image-lightbox-close:hover {
      background: rgba(255, 255, 255, 0.22);
      color: #ffffff;
    }

    .footer-note {
      margin: 24px 0 0;
      padding-top: 22px;
      font-size: 0.9rem;
      line-height: 1.8;
      color: rgba(22, 22, 22, 0.6);
    }

    .footer-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 10px;
    }

    .footer-brand {
      margin: 0;
      font-size: 0.86rem;
      font-weight: 700;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: rgba(22, 22, 22, 0.84);
    }

    .locale-empty {
      min-height: 60vh;
      padding: 32px 0 48px;
    }

    @media (max-width: 800px) {
      .section-row,
      .featured-card {
        grid-template-columns: 1fr;
      }

      .section-meta {
        display: none;
      }

      .featured-side {
        max-width: 320px;
        width: 100%;
        justify-self: center;
      }
    }

    @media (max-width: 600px) {
      :root {
        --page-gutter: 10px;
      }

      .page-shell {
        padding: 28px 0 44px;
      }

      .card-preview-triple {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 1px;
      }

      .card-preview-triple > figure:nth-child(2),
      .card-preview-triple > figure:nth-child(3) {
        display: block;
      }

      .card-preview-triple > figure:nth-child(1) {
        grid-column: auto;
      }

      .footer-top {
        flex-direction: column;
        align-items: flex-start;
      }

      .hero {
        padding: 0 0 22px;
      }

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

      .project-card,
      .featured-card {
        padding: 22px;
      }

      .featured-card .brand-icon,
      .brand-icon {
        width: 58px;
        height: 58px;
        border-radius: 16px;
      }

      .download-button {
        width: 100%;
        justify-content: center;
      }

      .download-list {
        flex-direction: column;
      }

      .featured-side {
        max-width: none;
      }
    }

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

      .project-card,
      .featured-card,
      .download-button {
        transition: none;
      }

      .mini-program-layer {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
      }

      .mini-program-close {
        transition: none;
      }

      .image-lightbox-layer {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
      }

      .image-lightbox-close {
        transition: none;
      }
    }