/* Brand OS V2.0 tokens are synchronized from the formal brand package. */
@import url("../assets/brand/controlrookie-tokens.css");

/* Brand OS web fonts: local, subsetted, and licensed under OFL-1.1. */
@font-face {
  font-family: "IBM Plex Sans SC";
  src: url("../assets/fonts/ibm-plex/IBMPlexSansSC-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans SC";
  src: url("../assets/fonts/ibm-plex/IBMPlexSansSC-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("../assets/fonts/ibm-plex/IBMPlexSans-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("../assets/fonts/ibm-plex/IBMPlexSans-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/ibm-plex/IBMPlexMono-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/ibm-plex/IBMPlexMono-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

/* ControlRookie Brand OS tokens. Layout geometry is intentionally unchanged. */
:root {
      --brand-blue: var(--cr-brand-primary, #0f58aa);
      --brand-blue-readable: var(--cr-brand-primary-content, #0b4a90);
      --canvas: var(--cr-canvas, #f7f8fa);
      --surface: var(--cr-surface, #ffffff);
      --surface-subtle: var(--cr-surface-subtle, #f1f3f5);
      --bg: var(--canvas);
      --fg: var(--cr-text, #171c21);
      --muted: var(--cr-text-secondary, #515b65);
      --muted-2: var(--cr-text-tertiary, #707a84);
      --soft: var(--surface);
      --soft-2: var(--surface-subtle);
      --line: var(--cr-border, #cbd1d8);
      --line-strong: var(--cr-border-strong, #9ca5af);
      --link: var(--brand-blue-readable);
      --link-strong: var(--cr-brand-primary-strong, #083b73);
      --link-soft: #edf3f8;
      --font-display: "IBM Plex Sans SC", "IBM Plex Sans", "Segoe UI", "Microsoft YaHei", sans-serif;
      --font-body: "IBM Plex Sans SC", "IBM Plex Sans", "Segoe UI", "Microsoft YaHei", sans-serif;
      --font-mono: "IBM Plex Mono", "Cascadia Mono", "Consolas", "Courier New", monospace;
      --radius-panel: var(--cr-radius-panel, 8px);
      --radius-control: var(--cr-radius-control, 8px);
      --nav-height: 76px;
      --page-gutter: clamp(20px, 4vw, 58px);
      --content-frame-gap: 58px;
      --content-max: 1240px;
      color-scheme: light;
      background: var(--canvas);
      color: var(--fg);
      font-family: var(--font-body);
      letter-spacing: 0;
    }

    * {
      box-sizing: border-box;
    }

    html {
      min-width: 320px;
      background: var(--canvas);
      scroll-behavior: smooth;
      scroll-padding-top: 0;
    }

    body {
      margin: 0;
      background: var(--canvas);
      color: var(--fg);
      font-family: var(--font-body);
      letter-spacing: 0;
      -webkit-font-smoothing: antialiased;
      text-rendering: geometricPrecision;
    }

    a,
    button,
    input {
      font: inherit;
    }

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

    button {
      border: 0;
      cursor: pointer;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    [tabindex="-1"]:focus-visible {
      outline: 2px solid var(--link);
      outline-offset: 3px;
    }

    .skip-link {
      position: fixed;
      z-index: 100;
      top: 12px;
      left: 12px;
      padding: 10px 12px;
      border-radius: 999px;
      background: #050505;
      color: #fff;
      font-size: 13px;
      transform: translateY(-72px);
      transition: transform 160ms ease;
    }

    .skip-link:focus {
      transform: translateY(0);
    }

    /* Brand canvas: neutral field with white content surfaces. */
    .site-shell {
      min-height: 100vh;
      background: var(--canvas);
    }

    /* 顶部固定导航：对应每页顶部的品牌、锚点、搜索和语言切换区域。 */
    .nav {
      position: fixed;
      z-index: 40;
      top: 0;
      left: 0;
      right: 0;
      height: var(--nav-height);
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      padding: 0 var(--page-gutter);
      border-bottom: 1px solid rgba(209, 209, 214, 0.72);
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(16px) saturate(130%);
      -webkit-backdrop-filter: blur(16px) saturate(130%);
    }

    .nav-actions {
      justify-self: end;
      display: inline-flex;
      align-items: center;
      justify-content: flex-end;
      gap: 10px;
    }

    .mobile-menu-toggle {
      width: 44px;
      height: 44px;
      display: none;
      place-items: center;
      align-content: center;
      gap: 5px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: #fff;
      color: #050505;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 16px;
      height: 1px;
      background: currentColor;
      transition: transform 160ms ease;
    }

    .mobile-menu-toggle[aria-expanded="true"] span:first-child {
      transform: translateY(3px) rotate(45deg);
    }

    .mobile-menu-toggle[aria-expanded="true"] span:last-child {
      transform: translateY(-3px) rotate(-45deg);
    }

    .mobile-menu-panel {
      display: none;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      justify-self: start;
      font-size: 15px;
      font-weight: 480;
      line-height: 1;
      white-space: nowrap;
    }

    .brand-logo {
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      flex: 0 0 30px;
      background: transparent;
      color: #050505;
      line-height: 1;
    }

    .brand-logo img {
      display: block;
      width: 100%;
      height: 100%;
      border-radius: 7px;
      object-fit: contain;
    }

    .brand-dot {
      width: 12px;
      height: 12px;
      flex: 0 0 12px;
      border-radius: 999px;
      background: #000;
    }

    .nav-links {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: clamp(18px, 2.2vw, 34px);
      color: #111;
      font-size: 14px;
      font-weight: 430;
      line-height: 1;
      white-space: nowrap;
    }

    .nav-links a {
      opacity: 0.92;
      transition: opacity 180ms ease, transform 180ms ease;
    }

    .nav-links a:hover {
      opacity: 0.48;
      transform: translateY(-1px);
    }

    .nav-article-menu {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .nav-article-menu::after {
      content: "";
      position: absolute;
      left: -24px;
      right: -24px;
      top: 100%;
      height: 14px;
    }

    .nav-article-trigger {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .nav-article-panel {
      position: absolute;
      z-index: 42;
      top: calc(100% + 10px);
      left: 50%;
      width: 198px;
      padding: 7px;
      display: grid;
      gap: 3px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: 0 10px 28px rgba(8, 10, 12, 0.08);
      opacity: 0;
      pointer-events: none;
      transform: translate(-50%, -4px);
      transition: opacity 160ms ease, transform 160ms ease;
    }

    .nav-article-panel::before {
      content: "";
      position: absolute;
      top: -11px;
      left: 0;
      right: 0;
      height: 11px;
    }

    .nav-article-menu:hover .nav-article-panel,
    .nav-article-menu:focus-within .nav-article-panel {
      opacity: 1;
      pointer-events: auto;
      transform: translate(-50%, 0);
    }

    .nav-menu-item {
      position: relative;
      display: grid;
    }

    .nav-menu-link {
      min-height: 32px;
      padding: 0 9px 0 11px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 8px;
      align-items: center;
      color: #242424;
      font-size: 12.5px;
      font-weight: 430;
      line-height: 1;
      opacity: 1;
      transform: none;
      border-radius: 6px;
      white-space: nowrap;
      transition: background 150ms ease, color 150ms ease;
    }

    .nav-links .nav-article-panel .nav-menu-link,
    .nav-links .nav-article-panel .nav-menu-link:hover {
      opacity: 1;
      transform: none;
    }

    .nav-menu-link span {
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .nav-menu-link em {
      color: #8f9994;
      font-size: 10.5px;
      font-style: normal;
      font-weight: 520;
      line-height: 1;
    }

    .nav-menu-label {
      cursor: default;
      user-select: none;
    }

    .nav-menu-label:focus-visible {
      outline: 1px solid rgba(0, 0, 0, 0.24);
      outline-offset: 2px;
    }

    .nav-menu-link:hover,
    .nav-menu-branch:focus-within > .nav-menu-link,
    .nav-menu-branch:hover > .nav-menu-link {
      color: #050505;
      opacity: 1;
      transform: none;
      background: var(--link-soft);
    }

    .nav-menu-branch-trigger::after {
      content: "›";
      color: #8f9994;
      font-size: 14px;
      line-height: 1;
    }

    .nav-menu-branch-trigger {
      grid-template-columns: minmax(0, 1fr) auto auto;
    }

    .nav-article-subpanel {
      position: absolute;
      z-index: 43;
      top: -7px;
      left: calc(100% + 9px);
      width: 168px;
      padding: 7px;
      display: grid;
      gap: 3px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: 0 10px 28px rgba(8, 10, 12, 0.08);
      opacity: 0;
      pointer-events: none;
      transform: translateX(-4px);
      transition: opacity 160ms ease, transform 160ms ease;
    }

    .nav-article-subpanel::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: -10px;
      width: 10px;
    }

    .nav-menu-branch:hover > .nav-article-subpanel,
    .nav-menu-branch:focus-within > .nav-article-subpanel {
      opacity: 1;
      pointer-events: auto;
      transform: translateX(0);
    }

    /* 导航搜索控件：默认黑色圆形图标，focus/open 状态展开为输入框。 */
    .search-shell {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: flex-end;
      width: 44px;
      height: 44px;
      border: 1px solid #050505;
      border-radius: 999px;
      background: #050505;
      color: #fff;
      overflow: hidden;
      transition: width 240ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease;
    }

    .search-shell.open {
      width: min(340px, 28vw);
      border-color: var(--line);
      background: var(--soft);
      color: #050505;
    }

    .search-icon {
      flex: 0 0 44px;
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      color: #fff;
      background: transparent;
    }

    .search-shell.open .search-icon {
      color: #050505;
    }

    .search-input {
      width: 0;
      min-width: 0;
      height: 44px;
      padding: 0;
      border: 0;
      outline: 0;
      background: transparent;
      color: #050505;
      font-size: 14px;
      opacity: 0;
      transition: width 240ms ease, opacity 180ms ease, padding 240ms ease;
    }

    .search-shell.open .search-input {
      width: 100%;
      padding: 0 14px 0 2px;
      opacity: 1;
    }

    .search-input::placeholder {
      color: rgba(5, 5, 5, 0.45);
    }

    .search-panel {
      position: absolute;
      top: calc(var(--nav-height) - 10px);
      right: var(--page-gutter);
      z-index: 41;
      width: min(420px, calc(100vw - 40px));
      max-height: 360px;
      overflow-x: hidden;
      overflow-y: auto;
      overscroll-behavior: contain;
      padding: 8px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: var(--cr-shadow-overlay, 0 12px 32px rgba(8, 10, 12, 0.16));
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      opacity: 0;
      pointer-events: none;
      transform: translateY(-6px);
      transition: opacity 180ms ease, transform 180ms ease;
    }

    .search-panel[hidden] {
      display: none;
    }

    .search-panel::-webkit-scrollbar {
      width: 8px;
    }

    .search-panel::-webkit-scrollbar-thumb {
      border: 2px solid rgba(255, 255, 255, 0.92);
      border-radius: 999px;
      background: rgba(0, 0, 0, 0.18);
    }

    .search-panel::-webkit-scrollbar-track {
      background: transparent;
    }

    /* 语言切换按钮：位于搜索框右侧，保持浅灰圆形按钮。 */
    .lang-toggle {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: var(--soft);
      color: #050505;
      font-size: 12px;
      font-weight: 560;
      line-height: 1;
      transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
    }

    .lang-toggle:hover {
      transform: translateY(-1px);
      border-color: var(--line-strong);
      background: #e9e9e9;
    }

    .search-panel.visible {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .search-filter-bar {
      position: sticky;
      top: 0;
      z-index: 2;
      display: flex;
      gap: 6px;
      padding: 4px 4px 8px;
      background: var(--surface);
    }

    .search-filter-bar button {
      min-height: 28px;
      padding: 0 10px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--muted);
      font-size: 12px;
      font-weight: 430;
      line-height: 1;
      white-space: nowrap;
    }

    .search-filter-bar button.active,
    .search-filter-bar button[aria-selected="true"] {
      border-color: rgba(15, 88, 170, 0.26);
      background: var(--link-soft);
      color: var(--link);
    }

    .search-results {
      display: grid;
      gap: 2px;
    }

    .search-result {
      min-height: 40px;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      gap: 12px;
      align-items: center;
      padding: 9px 10px;
      border-radius: 6px;
      color: var(--fg);
    }

    .search-result:hover,
    .search-result.active {
      background: var(--soft);
    }

    .search-result strong {
      min-width: 0;
      overflow: hidden;
      color: #050505;
      font-size: 13.5px;
      font-weight: 480;
      line-height: 1.25;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .search-result-type {
      min-width: 40px;
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 430;
      line-height: 1;
      white-space: nowrap;
    }

    .search-empty {
      padding: 18px 14px;
      color: var(--muted);
      font-size: 13px;
    }

    main {
      overflow: hidden;
    }

    /* 首页首屏：左图右文，下方四个领域卡片必须在桌面首屏内完整呈现。 */
    .hero {
      min-height: 100vh;
      display: grid;
      align-items: start;
      padding: calc(var(--nav-height) + var(--content-frame-gap)) var(--page-gutter) var(--content-frame-gap);
    }

    .hero-inner {
      width: min(100%, var(--content-max));
      min-height: calc(100vh - var(--nav-height) - (var(--content-frame-gap) * 2));
      margin: 0 auto;
      position: relative;
      display: grid;
      grid-template-columns: minmax(360px, 0.64fr) minmax(0, 0.96fr);
      grid-template-rows: auto 1fr;
      gap: clamp(22px, 3.4vw, 54px);
      align-items: start;
    }

    .hero-inner > * {
      position: relative;
      z-index: 1;
    }

    .hero-copy {
      padding-top: 0;
      justify-self: end;
    }

    .kicker {
      margin: 0 0 26px;
      color: #0a0a0a;
      font-size: 13px;
      font-weight: 500;
      line-height: 1;
      white-space: nowrap;
    }

    .kicker::before {
      content: "";
      display: inline-block;
      width: 7px;
      height: 7px;
      margin-right: 9px;
      border-radius: 999px;
      background: #050505;
      vertical-align: 1px;
    }

    h1 {
      max-width: 760px;
      margin: 0;
      color: var(--fg);
      font-family: var(--font-display);
      font-size: clamp(54px, 5.6vw, 84px);
      font-weight: 400;
      line-height: 0.98;
      letter-spacing: 0;
      text-wrap: balance;
    }

    .hero-statement {
      max-width: 690px;
      margin: 0;
      color: var(--fg);
      font-size: clamp(24px, 2vw, 32px);
      font-weight: 400;
      line-height: 1.18;
      letter-spacing: 0;
      text-wrap: balance;
    }

    .hero-title-rule {
      position: relative;
      width: min(100%, 660px);
      height: 1px;
      margin: clamp(24px, 2.8vw, 34px) 0 clamp(30px, 3vw, 42px);
      background: var(--line);
    }

    .hero-title-rule::before {
      content: "";
      position: absolute;
      left: 0;
      top: -2px;
      width: min(64px, 18%);
      height: 4px;
      background: var(--brand-blue);
    }

    .hero-description {
      max-width: 690px;
      margin: 26px 0 0;
      color: var(--muted);
      font-size: clamp(16px, 1.08vw, 18px);
      font-weight: 360;
      line-height: 1.58;
      letter-spacing: 0;
      text-wrap: pretty;
    }

    .portrait-frame {
      justify-self: start;
      width: min(100%, 390px);
      aspect-ratio: 0.82;
      display: grid;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface-subtle);
      color: var(--muted);
    }

    .portrait-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: 31% 50%;
      filter: saturate(0.72) contrast(0.96) brightness(1.03);
      mix-blend-mode: multiply;
    }

    .focus-strip {
      grid-column: 1 / -1;
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
      align-self: end;
      margin-top: 2px;
    }

    .focus-card {
      min-height: 154px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      position: relative;
      display: grid;
      grid-template-rows: auto 1fr;
      row-gap: 16px;
      align-content: center;
      justify-items: start;
      text-align: left;
      overflow: hidden;
    }

    .focus-card::after {
      content: attr(data-index);
      position: absolute;
      top: 18px;
      right: 18px;
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(5, 5, 5, 0.08);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.78);
      color: rgba(5, 5, 5, 0.42);
      font-size: 11px;
      font-weight: 430;
      line-height: 1;
      letter-spacing: 0.04em;
    }

    .focus-card strong {
      color: var(--fg);
      max-width: calc(100% - 46px);
      justify-self: start;
      font-size: clamp(22px, 1.55vw, 29px);
      font-weight: 400;
      line-height: 1.12;
      letter-spacing: 0;
      text-wrap: balance;
    }

    .focus-card span {
      max-width: 100%;
      justify-self: start;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.56;
      align-self: end;
      text-wrap: pretty;
    }

    .section {
      width: auto;
      min-height: 100vh;
      margin: 0 var(--page-gutter);
      padding: calc(var(--nav-height) + var(--content-frame-gap)) 0 var(--content-frame-gap);
      scroll-margin-top: 0;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

    .section > * {
      position: relative;
      z-index: 1;
    }

    .section-line {
      border-top: 0;
    }

    .section-head {
      position: absolute;
      top: calc(var(--nav-height) + var(--content-frame-gap) - 31px);
      left: 50%;
      width: min(100%, var(--content-max));
      transform: translateX(-50%);
      display: flex;
      flex-direction: column;
      gap: 16px;
      align-items: flex-start;
      margin: 0;
    }

    .section-head.compact {
      margin-bottom: 0;
    }

    .eyebrow {
      margin: 0;
      color: var(--fg);
      font-size: 13px;
      font-weight: 520;
      line-height: 1.2;
    }

    .work-grid,
    .article-grid,
    .product-grid,
    .about-shell,
    .contact-shell {
      width: min(100%, var(--content-max));
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }

    /* Resource grid: cards use Brand OS pure surfaces. */
    .work-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

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

    .product-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .article-grid-single {
      width: min(100%, 860px);
      grid-template-columns: minmax(0, 1fr);
      align-content: start;
    }

    .contact-shell > * {
      min-width: 0;
    }

    .article-hub {
      width: min(100%, calc(var(--content-max) + 116px));
      grid-template-columns: minmax(260px, 292px) minmax(0, 920px);
      grid-template-areas:
        "index heading"
        "index library";
      align-items: start;
      justify-content: space-between;
      column-gap: clamp(44px, 5vw, 72px);
    }

    .resource-hub,
    .product-hub {
      align-content: start;
    }

    .resource-library-panel,
    .product-library-panel {
      width: 100%;
    }

    .resource-card-grid {
      width: 100%;
      margin: 0;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      align-items: stretch;
    }

    .resource-card-grid .work-card {
      min-height: clamp(176px, 16vw, 224px);
    }

    .resource-card-grid .work-content {
      grid-template-rows: 14px minmax(40px, max-content) minmax(36px, auto);
    }

    .product-card-grid {
      width: 100%;
      margin: 0;
      grid-template-columns: minmax(0, 1fr);
      align-items: stretch;
    }

    .product-grid-single.product-card-grid {
      width: 100%;
    }

      .product-card-grid .info-card {
        min-height: 236px;
      }

    .product-console-card {
      min-height: 292px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
      gap: clamp(24px, 4vw, 54px);
      align-items: stretch;
      padding: clamp(26px, 3vw, 34px);
      border-color: var(--line-strong);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: none;
    }

    .product-console-card::before {
      content: none;
    }

    .product-console-main,
    .product-cover-orb {
      position: relative;
      z-index: 1;
    }

    .product-console-main {
      display: grid;
      grid-template-rows: auto auto auto 1fr;
      align-content: start;
      gap: 18px;
    }

    .product-console-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
    }

    .product-console-card .product-console-main small {
      width: max-content;
      min-height: 30px;
      padding: 0 13px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(5, 5, 5, 0.14);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.66);
      color: var(--fg);
      font-size: 12px;
      font-weight: 500;
    }

    .product-version-pills {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 8px;
    }

    .product-version-pills span {
      min-height: 30px;
      padding: 0 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--muted);
      font-size: 13px;
      font-weight: 430;
      line-height: 1;
      white-space: nowrap;
    }

    .product-console-card h3 {
      max-width: 640px;
      font-size: clamp(34px, 3.3vw, 54px);
      font-weight: 400;
      letter-spacing: 0;
    }

    .product-console-card p {
      max-width: 690px;
      color: var(--fg);
      font-size: 14px;
      line-height: 1.68;
    }

    .product-console-footer {
      align-self: end;
      display: grid;
      gap: 16px;
      width: min(100%, 680px);
      padding-top: 18px;
      border-top: 1px solid rgba(5, 5, 5, 0.14);
    }

    .product-console-capabilities {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 0;
      color: #343434;
      font-size: 12px;
      line-height: 1.35;
    }

    .product-console-capabilities span {
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }

    .product-console-capabilities span:not(:last-child)::after {
      content: "";
      width: 1px;
      height: 12px;
      margin: 0 12px;
      background: rgba(5, 5, 5, 0.2);
    }

    .product-console-cta {
      width: max-content;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--link);
      font-size: 13px;
      font-weight: 620;
      text-decoration: underline;
      text-decoration-thickness: 1px;
      text-underline-offset: 4px;
    }

    .product-console-cta i {
      font-size: 18px;
      font-style: normal;
      text-decoration: none;
      transition: transform 160ms ease;
    }

    .product-console-card:hover .product-console-cta i,
    .product-console-card:focus-visible .product-console-cta i {
      transform: translateX(3px);
    }

    .product-cover-orb {
      width: min(100%, 252px);
      aspect-ratio: 1;
      margin: 0;
      padding: 10px;
      place-self: center end;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: var(--surface-subtle);
      box-shadow: none;
      overflow: hidden;
    }

    .product-cover-orb img {
      display: block;
      width: 100%;
      height: 100%;
      border-radius: inherit;
      object-fit: cover;
      filter: grayscale(100%) contrast(1.04) saturate(0.08);
    }

    .article-index-panel {
      --toc-shell-left: max(var(--page-gutter), calc((100vw - (var(--content-max) + 116px)) / 2));
      --toc-preserved-right: calc(var(--toc-shell-left) + 390px - min(98px, max(0px, calc((100vw - (var(--content-max) + 116px)) / 2))));
      --toc-brand-right: calc(var(--page-gutter) + 140px);
      --toc-min-readable: 348px;
      --toc-target-left: max(var(--page-gutter), min(var(--toc-brand-right), calc(var(--toc-preserved-right) - var(--toc-min-readable))));
      grid-area: index;
      box-sizing: border-box;
      width: calc(var(--toc-preserved-right) - var(--toc-target-left));
      min-height: 528px;
      padding: 24px 22px;
      transform: translateX(calc(var(--toc-target-left) - var(--toc-shell-left)));
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .article-index-head {
      display: block;
    }

    .content-index-toggle {
      display: none;
    }

    .content-index-body {
      min-width: 0;
    }

    .article-series-heading small {
      color: #050505;
      font-size: 12px;
      font-weight: 680;
      line-height: 1;
    }

    .article-index-head strong {
      display: block;
      margin: 0 0 16px;
      color: #050505;
      font-size: 18px;
      font-weight: 680;
      line-height: 1.2;
    }

    .article-index-tree {
      display: grid;
      gap: 18px;
      margin-top: 0;
    }

    .article-index-tree details {
      display: grid;
      gap: 6px;
    }

    .article-index-tree summary {
      min-height: 30px;
      display: grid;
      grid-template-columns: 14px minmax(0, 1fr) auto;
      gap: 8px;
      align-items: center;
      color: #343434;
      font-size: 13px;
      line-height: 1.25;
      cursor: pointer;
      list-style: none;
      transition: color 180ms ease;
    }

    .article-index-tree summary::-webkit-details-marker {
      display: none;
    }

    .article-index-tree summary::before {
      content: "+";
      width: 14px;
      color: #8a8a8a;
      font-size: 12px;
      line-height: 1;
      text-align: center;
    }

    .article-index-tree details[open] > summary::before {
      content: "-";
    }

    .article-tree-group > summary {
      color: #050505;
      font-size: 12px;
      font-weight: 650;
    }

    .article-tree-node > summary {
      font-weight: 460;
    }

    .article-tree-selected > summary {
      color: #050505;
      font-weight: 700;
    }

    .article-tree-children {
      display: grid;
      gap: 6px;
      margin-left: 15px;
      padding-left: 10px;
      border-left: 1px solid rgba(0, 0, 0, 0.08);
    }

    .article-index-tree a {
      min-height: 28px;
      display: grid;
      grid-template-columns: 14px minmax(0, 1fr) auto;
      gap: 8px;
      align-items: center;
      color: #343434;
      font-size: 13px;
      line-height: 1.25;
      transition: color 180ms ease;
    }

    .article-index-tree a::before {
      content: "";
      width: 4px;
      height: 4px;
      justify-self: center;
      border-radius: 999px;
      background: #9a9a9a;
    }

    .article-index-tree a:hover,
    .article-index-tree a.active {
      color: var(--link);
    }

    .article-index-tree a.active {
      font-weight: 680;
    }

    .article-index-tree a.active::before {
      width: 5px;
      height: 5px;
      background: var(--link);
    }

    .article-index-tree span {
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-index-tree a span {
      overflow: visible;
      text-overflow: clip;
      white-space: normal;
      overflow-wrap: break-word;
    }

    .article-index-tree em {
      color: var(--muted-2);
      font-size: 11px;
      font-style: normal;
      font-weight: 520;
      line-height: 1;
      white-space: nowrap;
    }

    .article-library-panel {
      grid-area: library;
      min-width: 0;
      width: 100%;
      position: relative;
      display: grid;
      gap: 14px;
      align-items: start;
    }

    .article-route-anchor {
      position: absolute;
      top: -96px;
      width: 1px;
      height: 1px;
      pointer-events: none;
    }

    .article-series-heading {
      grid-area: heading;
      position: relative;
      min-height: 226px;
      padding: clamp(30px, 3.8vw, 46px) 0 clamp(32px, 3.8vw, 48px);
      display: grid;
      grid-template-columns: minmax(96px, 132px) minmax(0, 1fr);
      grid-template-areas:
        "meta title"
        "meta progress";
      align-content: center;
      gap: 14px clamp(28px, 4vw, 50px);
      border: 0;
      border-top: 1px solid #050505;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
      background: transparent;
      overflow: hidden;
    }

    .article-series-heading::before {
      content: "";
      position: absolute;
      top: -1px;
      left: 0;
      width: 64px;
      height: 3px;
      background: #050505;
    }

    .article-series-heading::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: -1px;
      width: clamp(96px, 10vw, 148px);
      height: 1px;
      background: #050505;
    }

    .article-series-heading small {
      grid-area: meta;
      align-self: start;
      display: grid;
      gap: 14px;
      color: #050505;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.08em;
      line-height: 1;
    }

    .article-series-heading small::after {
      content: "";
      width: 32px;
      height: 1px;
      background: #050505;
    }

    .article-series-heading h3 {
      grid-area: title;
      max-width: 760px;
      margin: 0;
      color: #050505;
      font-size: clamp(34px, 3.7vw, 54px);
      font-weight: 400;
      line-height: 1.07;
    }

    .resource-series-heading,
    .product-series-heading {
      min-height: 192px;
      grid-template-areas:
        "meta title";
    }

    .series-progress {
      grid-area: progress;
      display: grid;
      gap: 9px;
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 430;
      line-height: 1;
    }

    .series-progress b {
      display: block;
      width: min(260px, 100%);
      height: 5px;
      border-radius: 999px;
      background: rgba(0, 0, 0, 0.08);
      overflow: hidden;
    }

    .series-progress b i {
      display: block;
      width: min(64px, 26%);
      height: 100%;
      border-radius: inherit;
      background: #050505;
    }

    .article-list {
      display: grid;
      gap: 12px;
    }

    .article-topic-list {
      gap: 16px;
    }

    .article-list-card {
      min-height: 118px;
      padding: 20px 22px 22px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      grid-template-areas:
        "meta cardmeta"
        "title title";
      align-content: center;
      gap: 18px 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: none;
      transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    }

    .article-list-card:hover {
      transform: translateY(-3px);
      border-color: var(--line-strong);
      box-shadow: none;
    }

    .article-topic-card {
      min-height: 156px;
      padding: 26px 28px;
      background: var(--surface);
    }

    .article-topic-card strong {
      font-size: clamp(24px, 2vw, 34px);
      font-weight: 400;
    }

    .article-topic-card .article-card-no {
      font-size: clamp(18px, 1.3vw, 22px);
    }

    .article-list-card small {
      grid-area: meta;
      width: fit-content;
      min-height: 28px;
      padding: 0 12px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.76);
      color: var(--muted);
      font-size: 12px;
      font-weight: 430;
      line-height: 1;
    }

    .article-list-card strong {
      grid-area: title;
      display: flex;
      align-items: baseline;
      gap: 18px;
      color: var(--fg);
      font-size: clamp(18px, 1.42vw, 22px);
      font-weight: 400;
      line-height: 1.2;
      letter-spacing: 0;
    }

    .article-card-no {
      position: relative;
      flex: 0 0 auto;
      display: inline-flex;
      align-items: center;
      min-height: 34px;
      padding: 0 0 0 18px;
      border: 0;
      border-radius: 0;
      background: transparent;
      color: #181818;
      font-size: clamp(17px, 1.22vw, 21px);
      font-weight: 315;
      letter-spacing: 0;
      line-height: 1.18;
    }

    .article-card-no::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 3px;
      background: #050505;
    }

    .article-card-meta {
      grid-area: cardmeta;
      display: inline-flex;
      align-items: center;
      justify-content: end;
      gap: 8px;
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 420;
      line-height: 1;
      white-space: nowrap;
    }

    .article-card-meta time,
    .article-card-meta em {
      min-height: 28px;
      padding: 0 12px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.76);
    }

    .article-card-meta em {
      color: inherit;
      font-size: inherit;
      font-style: normal;
      font-weight: inherit;
      line-height: inherit;
    }

    .resource-detail-panel,
    .product-detail-panel {
      display: grid;
      gap: 18px;
      padding: clamp(24px, 3vw, 34px);
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      box-shadow: none;
    }

    .resource-detail-panel[hidden],
    .product-detail-panel[hidden],
    .product-card-grid[hidden] {
      display: none !important;
    }

    .detail-breadcrumb {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      color: var(--muted-2);
      font-size: 12px;
      line-height: 1.2;
    }

    .detail-breadcrumb a {
      color: var(--link);
      font-weight: 560;
    }

    .detail-panel-head {
      display: grid;
      gap: 14px;
      padding: 0 0 8px;
      border-bottom: 1px solid rgba(5, 5, 5, 0.08);
    }

    .detail-panel-head small {
      width: fit-content;
      min-height: 28px;
      padding: 0 12px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(5, 5, 5, 0.1);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.74);
      color: var(--muted);
      font-size: 12px;
      font-weight: 430;
    }

    .detail-panel-head h4 {
      margin: 0;
      color: #050505;
      font-size: clamp(30px, 3vw, 46px);
      font-weight: 400;
      line-height: 1.05;
      letter-spacing: 0;
    }

    .detail-panel-head p,
    .detail-note p {
      max-width: 760px;
      margin: 0;
      color: #343434;
      font-size: 14px;
      line-height: 1.72;
    }

    .detail-meta-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .detail-meta-tile {
      min-height: 86px;
      padding: 16px;
      display: grid;
      align-content: space-between;
      gap: 14px;
      border: 1px solid rgba(5, 5, 5, 0.08);
      border-radius: var(--radius-panel);
      background: var(--surface-subtle);
    }

    .detail-meta-tile span,
    .detail-block > strong {
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .detail-meta-tile strong {
      color: #050505;
      font-size: 15px;
      font-weight: 460;
      line-height: 1.3;
    }

    .detail-block {
      display: grid;
      gap: 12px;
      padding-top: 2px;
    }

    .detail-block ul {
      display: grid;
      gap: 9px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .detail-block li {
      position: relative;
      padding-left: 16px;
      color: #343434;
      font-size: 14px;
      line-height: 1.55;
    }

    .detail-block li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.72em;
      width: 4px;
      height: 4px;
      border-radius: 999px;
      background: var(--line-strong);
    }

    /* SyncBridge 产品详情：沿用官网内容中心结构，仅在详情面板内承接已确认的 Brand OS 营销系统。 */
    .syncbridge-detail-hero {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
      min-height: 510px;
      margin-top: 6px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      overflow: hidden;
    }

    .syncbridge-detail-identity {
      min-width: 0;
      padding: clamp(30px, 4vw, 46px);
    }

    .syncbridge-nameplate {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    .syncbridge-nameplate img {
      width: 50px;
      height: 50px;
      border: 1px solid var(--line);
      border-radius: 12px;
      object-fit: cover;
    }

    .syncbridge-nameplate strong,
    .syncbridge-nameplate span {
      display: block;
    }

    .syncbridge-nameplate strong {
      color: var(--fg);
      font-size: 18px;
      font-weight: 600;
      line-height: 1.1;
    }

    .syncbridge-nameplate span {
      margin-top: 4px;
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-eyebrow {
      margin: 62px 0 12px;
      color: var(--link);
      font-size: 12px;
      font-weight: 600;
    }

    .syncbridge-eyebrow span + span::before {
      content: "/";
      margin: 0 8px;
      color: var(--muted-2);
      font-weight: 400;
    }

    .syncbridge-detail-identity h4 {
      max-width: 570px;
      margin: 0;
      color: var(--fg);
      font-size: clamp(32px, 3.4vw, 46px);
      font-weight: 600;
      line-height: 1.08;
      letter-spacing: -0.035em;
      text-wrap: balance;
    }

    .syncbridge-lead {
      max-width: 620px;
      margin: 22px 0 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .syncbridge-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 24px;
    }

    .syncbridge-pills span {
      min-height: 28px;
      padding: 0 11px;
      display: inline-flex;
      align-items: center;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: var(--surface-subtle);
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-access-line {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 18px;
      margin: 20px 0 0;
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-access-line span {
      position: relative;
    }

    .syncbridge-access-line span + span::before {
      content: "";
      position: absolute;
      left: -10px;
      top: 0.45em;
      width: 3px;
      height: 3px;
      border-radius: 999px;
      background: var(--link);
    }

    .syncbridge-console {
      min-width: 0;
      padding: 26px;
      display: grid;
      grid-template-rows: auto 1fr auto;
      border-left: 1px solid var(--line);
      background: var(--surface-subtle);
    }

    .syncbridge-console-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--line-strong);
      color: var(--muted);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
      letter-spacing: 0.06em;
    }

    .syncbridge-console-head strong,
    .syncbridge-capability-grid article > span,
    .syncbridge-workflow-list li > span {
      color: var(--link);
    }

    .syncbridge-console-flow {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr);
      align-items: center;
    }

    .syncbridge-console-flow > div {
      min-width: 0;
      min-height: 170px;
      padding: 18px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-console-flow small {
      margin-bottom: auto;
      color: var(--muted-2);
      font-size: 10px;
    }

    .syncbridge-console-flow strong {
      margin-bottom: 9px;
      color: var(--fg);
      font-size: 15px;
      font-weight: 600;
    }

    .syncbridge-console-flow code {
      overflow: hidden;
      color: var(--muted);
      font-size: 9px;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .syncbridge-bridge {
      display: grid;
      gap: 8px;
      padding: 0 8px;
    }

    .syncbridge-bridge i {
      height: 3px;
      background: var(--brand-blue);
    }

    .syncbridge-console-statement {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      padding-top: 14px;
      border-top: 1px solid var(--line-strong);
      color: var(--muted);
      font-size: 9px;
      text-align: center;
    }

    .syncbridge-console-statement span:not(:last-child) {
      border-right: 1px solid var(--line);
    }

    .syncbridge-fact-strip {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      overflow: hidden;
    }

    .syncbridge-fact-strip div {
      min-height: 92px;
      padding: 20px;
    }

    .syncbridge-fact-strip div:not(:last-child) {
      border-right: 1px solid var(--line);
    }

    .syncbridge-fact-strip small,
    .syncbridge-fact-strip strong {
      display: block;
    }

    .syncbridge-fact-strip small {
      color: var(--muted);
      font-size: 10px;
    }

    .syncbridge-fact-strip strong {
      margin-top: 13px;
      color: var(--fg);
      font-size: 14px;
      font-weight: 600;
      line-height: 1.3;
    }

    .syncbridge-content-section {
      padding-top: 72px;
      scroll-margin-top: calc(var(--nav-height) + 24px);
    }

    .syncbridge-section-head {
      display: grid;
      grid-template-columns: 136px minmax(0, 1fr);
      align-items: start;
      padding-top: 22px;
      border-top: 1px solid var(--line-strong);
    }

    .syncbridge-section-head small {
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-section-head h5 {
      max-width: 650px;
      margin: 0;
      color: var(--fg);
      font-size: clamp(28px, 3vw, 42px);
      font-weight: 600;
      line-height: 1.1;
      letter-spacing: -0.03em;
      text-wrap: balance;
    }

    .syncbridge-capability-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-capability-grid article {
      min-height: 238px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-capability-grid article > span,
    .syncbridge-workflow-list li > span {
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 11px;
    }

    .syncbridge-capability-grid h6 {
      margin: 72px 0 12px;
      color: var(--fg);
      font-size: 21px;
      font-weight: 600;
    }

    .syncbridge-capability-grid p,
    .syncbridge-feature-grid p,
    .syncbridge-workflow-list p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.68;
    }

    .syncbridge-feature-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-feature-grid article {
      min-height: 158px;
      padding: 24px;
      display: grid;
      grid-template-columns: 46px minmax(0, 1fr);
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-feature-grid article > span {
      color: var(--link);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 11px;
    }

    .syncbridge-feature-grid h6 {
      margin: 0 0 12px;
      color: var(--fg);
      font-size: 19px;
      font-weight: 600;
    }

    .syncbridge-evidence-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-evidence-grid figure {
      margin: 0;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-evidence-grid figure.is-wide {
      grid-column: 1 / -1;
    }

    .syncbridge-evidence-grid img {
      width: 100%;
      max-height: 560px;
      display: block;
      object-fit: contain;
      object-position: center top;
      background: var(--surface-subtle);
    }

    .syncbridge-evidence-grid figure:not(.is-wide) img {
      aspect-ratio: 4 / 3;
    }

    .syncbridge-evidence-grid figcaption {
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      border-top: 1px solid var(--line);
    }

    .syncbridge-evidence-grid figcaption span {
      color: var(--link);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
    }

    .syncbridge-evidence-grid figcaption strong {
      color: var(--fg);
      font-size: 13px;
      font-weight: 600;
      text-align: right;
    }

    .syncbridge-workflow-list {
      margin: 36px 0 0;
      padding: 0;
      border-top: 1px solid var(--line-strong);
      list-style: none;
    }

    .syncbridge-workflow-list li {
      min-height: 92px;
      padding: 20px 0;
      display: grid;
      grid-template-columns: 136px minmax(0, 1fr);
      border-bottom: 1px solid var(--line);
    }

    .syncbridge-workflow-list strong {
      color: var(--fg);
      font-size: 17px;
      font-weight: 600;
    }

    .syncbridge-workflow-list p {
      margin-top: 7px;
    }

    .syncbridge-compatibility-panel {
      margin-top: 36px;
      padding: 30px;
      border-radius: var(--radius-panel);
      background: var(--fg);
      color: #fff;
    }

    .syncbridge-compatibility-panel > p {
      max-width: 690px;
      margin: 0;
      color: #d1d1d6;
      font-size: 16px;
      line-height: 1.72;
    }

    .syncbridge-compatibility-panel ul {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 1px;
      margin: 28px 0 0;
      padding: 1px;
      background: #38383a;
      list-style: none;
    }

    .syncbridge-compatibility-panel li {
      padding: 18px;
      background: var(--fg);
      color: #f5f5f7;
      font-size: 12px;
      line-height: 1.4;
    }

    .syncbridge-boundary-table {
      margin-top: 36px;
      border-top: 1px solid var(--line-strong);
    }

    .syncbridge-boundary-table div {
      padding: 20px 0;
      display: grid;
      grid-template-columns: 136px minmax(0, 1fr);
      border-bottom: 1px solid var(--line);
    }

    .syncbridge-boundary-table span {
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-boundary-table strong {
      color: var(--fg);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.6;
    }

    .syncbridge-purchase-panel {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 34px;
      align-items: end;
      margin-top: 72px;
      padding: 36px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-purchase-panel small {
      color: var(--muted);
      font-size: 11px;
    }

    .syncbridge-purchase-panel h5 {
      margin: 12px 0 0;
      color: var(--fg);
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 600;
      line-height: 1;
      letter-spacing: -0.03em;
    }

    .syncbridge-purchase-panel p {
      margin: 11px 0 0;
      color: var(--muted);
      font-size: 13px;
    }

    .syncbridge-purchase-action {
      display: grid;
      justify-items: end;
      gap: 10px;
      text-align: right;
    }

    .syncbridge-purchase-action a {
      min-height: 40px;
      padding: 0 17px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-control);
      background: var(--fg);
      color: #fff;
      font-size: 13px;
      font-weight: 600;
      transition: background 180ms ease, transform 100ms ease;
    }

    .syncbridge-purchase-action a:hover,
    .syncbridge-purchase-action a:focus-visible {
      background: var(--brand-strong);
    }

    .syncbridge-purchase-action a:active {
      transform: scale(0.98);
    }

    .syncbridge-purchase-action a.syncbridge-media-link {
      gap: 9px;
      border: 1px solid var(--line);
      background: var(--surface);
      color: var(--link);
      font-weight: 400;
    }

    .syncbridge-purchase-action a.syncbridge-media-link:hover,
    .syncbridge-purchase-action a.syncbridge-media-link:focus-visible {
      border-color: var(--line-strong);
      background: var(--soft);
      color: var(--link);
    }

    .syncbridge-media-link i {
      font-size: 15px;
      font-style: normal;
      line-height: 1;
    }

    .syncbridge-faq-section .syncbridge-section-head {
      margin-bottom: 24px;
    }

    .syncbridge-faq-section details {
      border-bottom: 1px solid var(--line);
    }

    .syncbridge-faq-section summary {
      position: relative;
      padding: 20px 44px 20px 0;
      color: var(--fg);
      cursor: pointer;
      list-style: none;
      font-size: 15px;
      font-weight: 600;
    }

    .syncbridge-faq-section summary::-webkit-details-marker {
      display: none;
    }

    .syncbridge-faq-section summary::after {
      content: "+";
      position: absolute;
      right: 4px;
      color: var(--link);
      font-size: 21px;
      font-weight: 400;
    }

    .syncbridge-faq-section details[open] summary::after {
      content: "−";
    }

    .syncbridge-faq-section details p {
      max-width: 700px;
      margin: 0;
      padding: 0 0 22px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.7;
    }

    /* SyncBridge 宣传页：官网编辑式视觉，主图聚焦真实 IDE 场景与 Compare。 */
    .syncbridge-detail-hero {
      min-height: 0;
      grid-template-columns: 150px minmax(0, 1fr);
      gap: 28px;
      padding: 34px 0 30px;
      border: 0;
      border-top: 1px solid var(--line-strong);
      border-bottom: 1px solid var(--line-strong);
      border-radius: 0;
      background: transparent;
    }

    .syncbridge-hero-index {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      color: var(--muted);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
      letter-spacing: 0.06em;
    }

    .syncbridge-hero-index::before {
      content: "";
      width: 44px;
      height: 3px;
      margin-bottom: 28px;
      background: var(--brand-blue);
    }

    .syncbridge-hero-index strong {
      color: var(--fg);
      font-weight: 500;
    }

    .syncbridge-hero-copy {
      max-width: 820px;
    }

    .syncbridge-hero-copy .syncbridge-nameplate {
      margin-bottom: 38px;
    }

    .syncbridge-hero-copy .syncbridge-eyebrow {
      margin: 0 0 18px;
      color: var(--link);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.04em;
    }

    .syncbridge-hero-copy h4 {
      max-width: 790px;
      margin: 0;
      color: var(--fg);
      font-size: clamp(38px, 5vw, 68px);
      font-weight: 600;
      line-height: 1.04;
      letter-spacing: -0.045em;
      text-wrap: balance;
    }

    .syncbridge-hero-copy .syncbridge-lead {
      max-width: 690px;
      margin: 24px 0 0;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .syncbridge-positioning {
      margin: 22px 0 0;
      color: var(--fg);
      font-size: 18px;
      font-weight: 600;
      line-height: 1.5;
    }

    .syncbridge-pain-grid {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      margin-top: 36px;
      border-top: 1px solid var(--line-strong);
      border-bottom: 1px solid var(--line-strong);
    }

    .syncbridge-pain-grid article {
      min-height: 184px;
      padding: 20px;
    }

    .syncbridge-pain-grid article:not(:last-child) {
      border-right: 1px solid var(--line);
    }

    .syncbridge-pain-grid span,
    .syncbridge-advantage-grid article > span,
    .syncbridge-value-grid article > span {
      color: var(--link);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
    }

    .syncbridge-pain-grid h6,
    .syncbridge-value-grid h6 {
      margin: 40px 0 10px;
      color: var(--fg);
      font-size: 17px;
      font-weight: 600;
    }

    .syncbridge-pain-grid p,
    .syncbridge-advantage-grid p,
    .syncbridge-value-grid p {
      margin: 0;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.65;
    }

    .syncbridge-advantage-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-advantage-grid article {
      min-height: 132px;
      padding: 22px;
      display: grid;
      grid-template-columns: 44px minmax(0, 1fr);
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-advantage-grid h6 {
      margin: 0 0 9px;
      color: var(--fg);
      font-size: 18px;
      font-weight: 600;
    }

    .syncbridge-comparison-table {
      margin-top: 36px;
      border-top: 1px solid var(--line-strong);
    }

    .syncbridge-comparison-head,
    .syncbridge-comparison-row {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      border-bottom: 1px solid var(--line);
    }

    .syncbridge-comparison-head {
      color: var(--muted);
      font-size: 10px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .syncbridge-comparison-head > *,
    .syncbridge-comparison-row > * {
      padding: 17px 20px;
    }

    .syncbridge-comparison-head strong,
    .syncbridge-comparison-row strong {
      border-left: 1px solid var(--line);
    }

    .syncbridge-comparison-row span {
      color: var(--muted);
      font-size: 13px;
    }

    .syncbridge-comparison-row strong {
      color: var(--fg);
      font-size: 13px;
      font-weight: 600;
    }

    .syncbridge-comparison-row strong::before {
      content: "→";
      margin-right: 12px;
      color: var(--link);
    }

    .syncbridge-value-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-value-grid article {
      min-height: 194px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-value-grid h6 {
      margin-top: 46px;
      font-size: 19px;
    }

    .syncbridge-primary-visual {
      margin: 28px 0 0;
      overflow: hidden;
      border: 1px solid var(--line-strong);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-visual-label {
      min-height: 46px;
      padding: 0 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--line);
      color: var(--muted);
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
      letter-spacing: 0.05em;
    }

    .syncbridge-visual-label strong {
      color: var(--link);
      font-weight: 600;
    }

    .syncbridge-primary-visual img {
      width: 100%;
      display: block;
      aspect-ratio: 1672 / 941;
      object-fit: cover;
    }

    .syncbridge-primary-visual figcaption {
      padding: 15px 18px;
      border-top: 1px solid var(--line);
      color: var(--fg);
      font-size: 13px;
      font-weight: 560;
      line-height: 1.5;
    }

    .syncbridge-fact-strip {
      margin-top: 10px;
    }

    .syncbridge-core-flow {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 36px;
    }

    .syncbridge-core-flow article {
      min-height: 252px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .syncbridge-core-flow article.is-primary {
      border-top: 3px solid var(--brand-blue);
      padding-top: 22px;
    }

    .syncbridge-core-flow article > span,
    .syncbridge-core-flow article > small {
      font-family: "IBM Plex Mono", "Cascadia Mono", monospace;
      font-size: 10px;
    }

    .syncbridge-core-flow article > span {
      color: var(--link);
    }

    .syncbridge-core-flow article > small {
      margin-top: 42px;
      color: var(--muted);
      letter-spacing: 0.04em;
    }

    .syncbridge-core-flow h6 {
      margin: 8px 0 12px;
      color: var(--fg);
      font-size: 24px;
      font-weight: 600;
    }

    .syncbridge-core-flow p {
      margin: auto 0 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.68;
    }

    .syncbridge-command-strip {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      margin-top: 36px;
      border-top: 1px solid var(--line-strong);
      border-bottom: 1px solid var(--line-strong);
    }

    .syncbridge-command-strip article {
      min-height: 108px;
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .syncbridge-command-strip article:not(:last-child) {
      border-right: 1px solid var(--line);
    }

    .syncbridge-command-strip strong {
      color: var(--fg);
      font-size: 16px;
      font-weight: 600;
    }

    .syncbridge-command-strip span {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
    }

    /* 最终售前版节奏：以留白和少量横线组织信息，避免连续卡片墙。 */
    .syncbridge-detail-hero {
      padding: 54px 0 64px;
    }

    .syncbridge-hero-copy .syncbridge-nameplate {
      margin-bottom: 54px;
    }

    .syncbridge-content-section {
      padding-top: 116px;
    }

    .syncbridge-section-head {
      padding-top: 30px;
    }

    .syncbridge-pain-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 0 64px;
      margin-top: 58px;
      border-top: 1px solid var(--line);
      border-bottom: 0;
    }

    .syncbridge-pain-grid article {
      min-height: 158px;
      padding: 28px 0 32px;
      border-bottom: 1px solid var(--line);
    }

    .syncbridge-pain-grid article:not(:last-child) {
      border-right: 0;
    }

    .syncbridge-pain-grid h6 {
      margin-top: 28px;
    }

    .syncbridge-advantage-grid,
    .syncbridge-value-grid {
      gap: 0 64px;
      margin-top: 58px;
      border-top: 1px solid var(--line);
    }

    .syncbridge-advantage-grid article {
      min-height: 146px;
      padding: 30px 0;
      border: 0;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
      background: transparent;
    }

    .syncbridge-primary-visual {
      margin-top: 116px;
    }

    .syncbridge-fact-strip {
      margin-top: 18px;
    }

    .syncbridge-comparison-table {
      margin-top: 58px;
    }

    .syncbridge-comparison-head > *,
    .syncbridge-comparison-row > * {
      padding: 22px 24px;
    }

    .syncbridge-value-grid article {
      min-height: 210px;
      padding: 34px 0 38px;
      border: 0;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
      background: transparent;
    }

    .syncbridge-value-grid h6 {
      margin-top: 54px;
    }

    .syncbridge-core-flow {
      gap: 18px;
      margin-top: 58px;
    }

    .syncbridge-core-flow article {
      min-height: 286px;
      padding: 30px;
    }

    .syncbridge-command-strip {
      margin-top: 58px;
    }

    .syncbridge-command-strip article {
      min-height: 132px;
      padding: 28px;
    }

    .syncbridge-purchase-panel {
      margin-top: 124px;
      padding: 48px;
    }

    .detail-links {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
    }

    .detail-links strong {
      flex-basis: 100%;
    }

    .detail-links a {
      min-height: 34px;
      padding: 0 14px;
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(5, 5, 5, 0.12);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--link);
      font-size: 13px;
      font-weight: 560;
    }

    .product-grid-single {
      width: min(100%, 860px);
      grid-template-columns: minmax(0, 1fr);
      align-content: start;
    }

    .single-section-label {
      margin: 0 0 0 4px;
      color: var(--fg);
      font-size: 13px;
      font-weight: 520;
      line-height: 1.2;
    }

    .product-grid-single .info-card {
      min-height: 284px;
    }

    .section-tall {
      min-height: 100vh;
      justify-content: flex-start;
      padding-top: calc(var(--nav-height) + var(--content-frame-gap));
      padding-bottom: var(--content-frame-gap);
    }

    #about {
      padding-top: calc(var(--nav-height) + 48px);
      padding-bottom: 34px;
    }

    .about-shell {
      grid-template-columns: minmax(420px, 0.9fr) minmax(0, 1.1fr);
      grid-template-rows: minmax(0, 1fr);
      gap: clamp(54px, 5vw, 82px) clamp(60px, 5vw, 86px);
      align-content: center;
    }

    .about-intro-card {
      min-height: clamp(668px, calc(100vh - var(--nav-height) - 128px), 820px);
      padding: clamp(16px, 2vw, 24px) 0 0;
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
      overflow: visible;
    }

    .about-intro-card h2 {
      max-width: 390px;
      margin: 0;
      color: var(--fg);
      font-size: clamp(38px, 4.2vw, 58px);
      font-weight: 400;
      line-height: 1.02;
      letter-spacing: 0;
      text-wrap: balance;
    }

    .about-intro-card > p {
      max-width: 560px;
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.72;
    }

    .about-quiet-rule {
      position: relative;
      width: min(100%, 430px);
      height: 1px;
      margin: clamp(28px, 3vw, 38px) 0 clamp(24px, 2.8vw, 34px);
      background: var(--line);
    }

    .about-quiet-rule::before {
      content: "";
      position: absolute;
      left: 0;
      top: -2px;
      width: 56px;
      height: 4px;
      background: var(--brand-blue);
    }

    .about-text-card {
      margin-top: auto;
      padding: clamp(18px, 2vw, 24px) clamp(20px, 2.4vw, 28px);
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      box-shadow: none;
    }

    .about-timeline {
      position: relative;
      grid-column: 2;
      grid-row: 1;
      margin: 0;
      min-height: clamp(668px, calc(100vh - var(--nav-height) - 128px), 820px);
      padding: 2px 0;
      list-style: none;
      display: grid;
      gap: 4px;
      align-content: center;
    }

    .about-timeline::before {
      content: "";
      position: absolute;
      top: 18px;
      bottom: 18px;
      left: 50%;
      width: 1px;
      transform: translateX(-50%);
      background: var(--line-strong);
    }

    .timeline-node {
      position: relative;
      min-height: 53px;
      padding: 0;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);
      gap: 12px;
      align-items: center;
    }

    .timeline-node span {
      position: relative;
      grid-column: 2;
      justify-self: center;
      z-index: 1;
      width: 54px;
      height: 31px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(5, 5, 5, 0.12);
      border-radius: 999px;
      background: var(--surface);
      color: var(--fg);
      font-size: 11px;
      font-weight: 430;
      line-height: 1;
      letter-spacing: 0.02em;
    }

    .timeline-node div {
      grid-column: 3;
      min-width: 0;
      padding: 8px 12px 9px;
      border: 1px solid rgba(5, 5, 5, 0.08);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .timeline-node:nth-child(even) div {
      grid-column: 1;
      text-align: right;
    }

    .timeline-node strong {
      color: var(--fg);
      font-size: clamp(13.5px, 0.95vw, 15px);
      font-weight: 590;
      line-height: 1.18;
      letter-spacing: 0;
    }

    .timeline-node p {
      margin: 5px 0 0;
      color: var(--muted);
      font-size: 11px;
      line-height: 1.3;
    }

    .about-capability-card {
      min-height: 0;
      margin-top: 0;
      padding: 0;
      border: 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

    .about-capability-grid {
      margin: 0;
      display: grid;
      grid-template-columns: 1fr;
      gap: 0;
    }

    .about-capability-grid section {
      position: relative;
      min-width: 0;
      padding: 12px 0 14px 28px;
      border: 1px solid rgba(5, 5, 5, 0.08);
      border-width: 0 0 1px;
      border-radius: 0;
      background: var(--surface);
      display: grid;
      grid-template-columns: minmax(0, 1fr) 24px;
      column-gap: 12px;
      align-items: start;
    }

    .about-capability-grid section:last-child {
      border-bottom-width: 0;
      padding-bottom: 8px;
    }

    .about-capability-grid section::before {
      content: "";
      position: absolute;
      left: 0;
      top: 12px;
      bottom: 14px;
      width: 4px;
      border-radius: 999px;
      background: #050505;
    }

    .about-capability-grid section::after {
      grid-column: 2;
      grid-row: 1;
      align-self: start;
      justify-self: end;
      color: rgba(5, 5, 5, 0.22);
      font-size: 12px;
      font-weight: 430;
      letter-spacing: 0.08em;
      line-height: 1.56;
    }

    .about-capability-grid section:nth-child(1)::after {
      content: "01";
    }

    .about-capability-grid section:nth-child(2)::after {
      content: "02";
    }

    .about-capability-grid section:nth-child(3)::after {
      content: "03";
    }

    .about-capability-grid p {
      grid-column: 1;
      grid-row: 1;
      min-width: 0;
      max-width: none;
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.56;
      overflow-wrap: anywhere;
    }

    .work-card {
      position: relative;
      min-height: clamp(250px, 24vw, 346px);
      display: flex;
      align-items: stretch;
      padding: 22px;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      color: var(--fg);
    }

    a.work-card,
    a.product-console-card {
      transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    }

    a.work-card:hover,
    a.product-console-card:hover {
      transform: translateY(-2px);
      border-color: var(--line-strong);
      box-shadow: none;
    }

    a.work-card.active,
    a.product-console-card.active {
      border-color: rgba(5, 5, 5, 0.32);
    }

    .work-card::before {
      content: none;
    }

    .work-card::after {
      content: none;
    }

    .work-content {
      position: relative;
      z-index: 2;
      width: 100%;
      height: 100%;
      display: grid;
      grid-template-rows: 14px 64px minmax(44px, auto);
      row-gap: 14px;
      align-content: end;
    }

    .work-index {
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .work-title {
      align-self: start;
      color: var(--fg);
      font-size: clamp(19px, 1.8vw, 25px);
      font-weight: 360;
      line-height: 1.12;
      letter-spacing: 0;
      text-shadow: none;
    }

    .work-meta {
      align-self: start;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.38;
    }

    .info-card {
      min-height: 260px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-card > div {
      display: grid;
      grid-template-rows: 14px minmax(72px, max-content) minmax(66px, auto);
      row-gap: 14px;
    }

    a.info-card {
      transition: transform 220ms ease, background 220ms ease, border-color 220ms ease;
    }

    a.info-card:hover {
      transform: translateY(-2px);
      border-color: var(--line-strong);
      background: var(--surface);
    }

    .info-card small {
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .info-card h3 {
      align-self: start;
      margin: 0;
      color: #050505;
      font-size: clamp(22px, 1.85vw, 28px);
      font-weight: 315;
      line-height: 1.14;
      letter-spacing: 0;
    }

    .info-card p {
      align-self: start;
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.56;
    }

    .info-card footer {
      margin-top: 28px;
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 500;
    }

    .info-card.product-console-card {
      position: relative;
      min-height: 292px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
      gap: clamp(24px, 4vw, 54px);
      align-items: stretch;
      justify-content: stretch;
    }

    .info-card.product-console-card > .product-console-main {
      display: grid;
      grid-template-rows: auto auto auto 1fr;
      align-content: start;
      row-gap: 18px;
    }

    .contact-shell {
      min-height: min(752px, calc(100vh - var(--nav-height) - (var(--content-frame-gap) * 2)));
      grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(280px, 0.92fr);
      /* 保留原有二维码纵向坐标；第二行仅保留不可见的版式留白。 */
      grid-template-rows: 310px 88px 326px;
      align-content: start;
    }

    .contact-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .contact-statement {
      grid-column: 1 / span 3;
      min-height: 310px;
      padding: 0 clamp(8px, 1.2vw, 14px) 18px 0;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
    }

    .contact-statement h2 {
      margin: 0;
      color: var(--fg);
      max-width: 840px;
      font-size: clamp(32px, 3.8vw, 56px);
      font-weight: 400;
      line-height: 1.1;
      letter-spacing: 0;
      text-wrap: wrap;
      overflow-wrap: anywhere;
    }

    .contact-statement-rule {
      position: relative;
      width: min(100%, 760px);
      height: 1px;
      margin-top: clamp(26px, 3vw, 38px);
      background: var(--line);
    }

    .contact-statement-rule::before {
      content: "";
      position: absolute;
      left: 0;
      top: -2px;
      width: 64px;
      height: 4px;
      background: var(--brand-blue);
    }

    .contact-visual-card {
      grid-column: 4;
      grid-row: 1;
      position: relative;
      min-height: 310px;
      padding: 18px 20px 20px;
      border: 0;
      background: transparent;
      display: grid;
      place-items: start center;
    }

    .contact-visual-card::after {
      content: "";
      position: absolute;
      left: calc(50% - 22px);
      top: 270px;
      width: 44px;
      height: 2px;
      background: #050505;
      opacity: 0.82;
      pointer-events: none;
    }

    .contact-visual-card img {
      display: block;
      width: min(100%, 238px);
      height: auto;
      align-self: start;
      justify-self: center;
      object-fit: contain;
      filter: none;
      box-shadow: none;
    }

    /* 合作邀请：收进主标题与横线之间，不增加独立卡片、分隔线或 CTA。 */
    .contact-cooperation {
      width: min(100%, 760px);
      margin-top: 30px;
    }

    .contact-cooperation small {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--fg);
      font-size: 12px;
      font-weight: 600;
      line-height: 1.35;
    }

    .contact-cooperation-mark {
      width: 8px;
      height: 8px;
      box-sizing: border-box;
      border: 2px solid var(--brand-blue);
      background: transparent;
    }

    .contact-cooperation p {
      margin: 0;
      max-width: 760px;
      padding-top: 10px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .contact-link-stack {
      grid-column: 4;
      grid-row: 3;
      height: 326px;
      display: grid;
      grid-template-rows: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .contact-card {
      position: relative;
      min-height: 260px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    a.contact-card {
      transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
    }

    a.contact-card::after {
      content: "→";
      position: absolute;
      top: 20px;
      right: 20px;
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--link);
      font-size: 15px;
      line-height: 1;
      transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
    }

    a.contact-card:hover {
      transform: translateY(-3px);
      border-color: var(--line-strong);
    }

    a.contact-card:hover::after {
      transform: translateX(2px);
      border-color: var(--line-strong);
      background: rgba(255, 255, 255, 0.94);
    }

    .contact-card small {
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .contact-card strong {
      color: var(--fg);
      font-size: clamp(19px, 1.55vw, 24px);
      font-weight: 400;
      line-height: 1.18;
      letter-spacing: 0;
      overflow-wrap: anywhere;
    }

    .contact-card.text-card strong {
      margin-top: auto;
      font-size: clamp(20px, 1.45vw, 26px);
      line-height: 1.22;
    }

    .contact-link-stack .contact-card {
      min-height: 0;
    }

    .contact-link-stack .contact-card strong {
      white-space: normal;
      overflow-wrap: anywhere;
      word-break: break-word;
    }

    .contact-card span {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.4;
    }

    .qr-card {
      gap: 18px;
    }

    .contact-wechat-card {
      grid-column: 1;
      grid-row: 3;
    }

    .contact-official-card {
      grid-column: 2;
      grid-row: 3;
    }

    .contact-bilibili-card {
      grid-column: 3;
      grid-row: 3;
    }

    .qr-slot {
      width: min(100%, 182px);
      aspect-ratio: 1;
      border: 1px solid var(--line-strong);
      border-radius: var(--radius-panel);
      padding: 10px;
      background: #fff;
      object-fit: contain;
      align-self: flex-start;
    }

    /* B站提供的是完整二维码海报；网页仅裁切显示原始二维码区域，不重绘二维码。 */
    .bilibili-qr-slot {
      position: relative;
      display: block;
      overflow: hidden;
      padding: 0;
    }

    .bilibili-qr-slot img {
      position: absolute;
      left: 50%;
      top: 50%;
      width: 167%;
      max-width: none;
      height: auto;
      transform: translate(-50%, -50%);
    }

    .footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin: 0 var(--page-gutter);
      padding: 34px 0 46px;
      border-top: 1px solid var(--line);
      color: var(--muted);
      font-size: 13px;
    }

    .fade-in {
      opacity: 0;
      transition: opacity 520ms ease;
    }

    .fade-in.visible {
      opacity: 1;
    }

    /* 文章页导航：复用首页导航底座，仅把右侧操作改成返回文章入口。 */
    .article-back {
      display: inline-grid;
      place-items: center;
      min-height: 38px;
      padding: 0 16px;
      border-radius: 999px;
      background: #050505;
      color: #fff;
      font-size: 13px;
      font-weight: 460;
      line-height: 1;
      white-space: nowrap;
    }

    .article-mobile-control {
      display: none;
    }

    /* Article canvas: preserve expert-reading whitespace and hierarchy. */
    .article-page {
      padding: calc(var(--nav-height) + 44px) var(--page-gutter) 86px;
      overflow: visible;
    }

    .article-shell {
      width: min(100%, calc(var(--content-max) + 116px));
      margin: 0 auto;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(260px, 292px) minmax(0, 920px);
      grid-template-areas:
        ". breadcrumb"
        "toc hero"
        "toc main";
      column-gap: clamp(44px, 5vw, 72px);
      row-gap: 38px;
      align-items: start;
      justify-content: space-between;
    }

    .article-main {
      grid-area: main;
      min-width: 0;
      display: grid;
      gap: 38px;
    }

    .article-hero {
      grid-area: hero;
      position: relative;
      min-height: 0;
      display: grid;
      align-content: end;
      padding: clamp(30px, 3.3vw, 46px) clamp(32px, 3.6vw, 50px) clamp(34px, 3.6vw, 48px);
      border: 1px solid var(--line);
      border-left: 4px solid var(--fg);
      border-radius: 0;
      background: var(--surface);
      clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
      overflow: hidden;
    }

    .article-hero::before {
      content: "ARTICLE";
      position: absolute;
      top: 22px;
      right: 54px;
      color: rgba(5, 5, 5, 0.16);
      font-size: 12px;
      font-weight: 640;
      letter-spacing: 0.18em;
    }

    .article-hero::after {
      content: "";
      position: absolute;
      top: 0;
      right: 0;
      width: 34px;
      height: 34px;
      border-left: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      background: var(--canvas);
    }

    .article-breadcrumb {
      grid-area: breadcrumb;
      display: flex;
      flex-wrap: nowrap;
      gap: 8px;
      align-items: center;
      min-width: 0;
      margin-bottom: 8px;
      color: var(--muted-2);
      font-size: 12px;
      line-height: 1.2;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .article-breadcrumb a {
      flex: 0 1 auto;
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      color: var(--link);
      font-weight: 560;
      text-decoration: underline;
      text-decoration-thickness: 1px;
      text-underline-offset: 3px;
    }

    .article-breadcrumb span {
      color: #b0b0b0;
    }

    .article-breadcrumb a:hover {
      color: var(--link-strong);
    }

    .article-hero h1 {
      max-width: 960px;
      margin-top: 28px;
      font-size: clamp(34px, 2.75vw, 42px);
      font-weight: 400;
      line-height: 1.07;
      text-wrap: balance;
    }

    .article-summary {
      max-width: 720px;
      margin: 22px 0 0;
      color: var(--muted);
      font-size: clamp(15px, 1.25vw, 18px);
      font-weight: 350;
      line-height: 1.68;
    }

    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 28px;
    }

    .article-meta span {
      padding: 8px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--muted);
      font-size: 12px;
      line-height: 1;
    }

    .article-toc {
      grid-area: toc;
      --toc-shell-left: max(var(--page-gutter), calc((100vw - (var(--content-max) + 116px)) / 2));
      --toc-preserved-right: calc(var(--toc-shell-left) + 390px - min(98px, max(0px, calc((100vw - (var(--content-max) + 116px)) / 2))));
      --toc-brand-right: calc(var(--page-gutter) + 140px);
      --toc-min-readable: 348px;
      --toc-target-left: max(var(--page-gutter), min(var(--toc-brand-right), calc(var(--toc-preserved-right) - var(--toc-min-readable))));
      position: sticky;
      top: calc(var(--nav-height) + 22px);
      box-sizing: border-box;
      width: calc(var(--toc-preserved-right) - var(--toc-target-left));
      max-height: calc(100vh - var(--nav-height) - 44px);
      margin-top: 0;
      padding: 22px 36px 22px 24px;
      transform: translateX(calc(var(--toc-target-left) - var(--toc-shell-left)));
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      overflow-y: auto;
      overflow-x: hidden;
    }

    .article-toc-toggle {
      display: none;
    }

    .article-toc strong {
      display: block;
      margin-bottom: 16px;
      color: #050505;
      font-size: 18px;
      font-weight: 680;
    }

    .article-toc ol {
      display: grid;
      gap: 9px;
      margin: 0;
      padding: 0;
      list-style: none;
      min-width: 0;
    }

    .article-toc a {
      display: block;
      position: relative;
      min-width: 0;
      padding-left: 14px;
      color: #343434;
      font-size: 14px;
      line-height: 1.38;
      white-space: normal;
      overflow-wrap: break-word;
      text-decoration: none;
      transition: color 180ms ease, font-weight 180ms ease;
    }

    .article-toc a::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.72em;
      width: 4px;
      height: 4px;
      border-radius: 999px;
      background: var(--line-strong);
      transition: background 180ms ease, transform 180ms ease;
    }

    .article-toc a:hover {
      color: #050505;
    }

    .article-toc a:hover::before {
      transform: scale(1.22);
      background: var(--link);
    }

    .article-toc a.is-active {
      color: var(--link);
      font-weight: 720;
    }

    .article-toc a.is-active::before {
      width: 5px;
      height: 5px;
      background: var(--link);
    }

    .article-content {
      min-width: 0;
      color: #111;
      font-size: 15.5px;
      font-weight: 360;
      line-height: 1.82;
    }

    .article-content h1,
    .article-content h2,
    .article-content h3 {
      color: #050505;
      letter-spacing: 0;
      scroll-margin-top: calc(var(--nav-height) + 28px);
    }

    .article-content h1 {
      margin: 0 0 28px;
      font-size: clamp(28px, 2.6vw, 38px);
      font-weight: 285;
      line-height: 1.16;
    }

    .article-content h2 {
      margin: 58px 0 18px;
      font-size: clamp(24px, 2.15vw, 32px);
      font-weight: 285;
      line-height: 1.18;
    }

    .article-content h3 {
      margin: 34px 0 12px;
      font-size: clamp(18px, 1.55vw, 23px);
      font-weight: 340;
      line-height: 1.28;
    }

    .article-content p,
    .article-content li {
      color: #242424;
    }

    .article-content a {
      color: var(--link);
      font-weight: 540;
      text-decoration: underline;
      text-decoration-thickness: 1px;
      text-underline-offset: 3px;
      transition: color 180ms ease;
    }

    .article-content a:hover {
      color: var(--link-strong);
    }

    .article-content p {
      margin: 0 0 18px;
    }

    .article-content ul {
      display: grid;
      gap: 8px;
      margin: 0 0 24px;
      padding: 0 0 0 20px;
    }

    .article-source-scope {
      margin: 0 0 34px;
      padding: 18px 0 18px 22px;
      border-left: 4px solid var(--fg);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      background: var(--surface);
    }

    .article-source-scope strong {
      display: block;
      margin: 0 0 8px;
      color: #050505;
      font-size: 13px;
      font-weight: 680;
      line-height: 1.2;
    }

    .article-source-scope p {
      max-width: 860px;
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.72;
    }

    .article-content blockquote {
      margin: 30px 0;
      padding: 2px 0 2px 22px;
      border: 0;
      border-left: 3px solid var(--fg);
      border-radius: 0;
      background: transparent;
      color: #050505;
      font-size: clamp(17px, 1.35vw, 21px);
      font-weight: 310;
      line-height: 1.68;
    }

    .article-content hr {
      margin: 54px 0;
      border: 0;
      border-top: 1px solid var(--line);
    }

    .article-content code {
      padding: 0.16em 0.36em;
      border-radius: 7px;
      background: var(--soft);
      color: #050505;
      font-family: var(--font-mono);
      font-size: 0.92em;
      font-variant-ligatures: none;
      overflow-wrap: anywhere;
      word-break: break-word;
    }

    .article-content li {
      min-width: 0;
      overflow-wrap: anywhere;
    }

    .code-card,
    .mermaid-card,
    .article-table-wrap,
    .article-content figure {
      margin: 28px 0;
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
      overflow: hidden;
    }

    .code-card small,
    .mermaid-card small {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 14px 18px;
      border-bottom: 1px solid var(--line);
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .code-card pre,
    .mermaid-card pre {
      margin: 0;
      padding: 22px;
      overflow-x: auto;
      background: var(--surface-subtle);
      tab-size: 4;
    }

    .mermaid-card {
      background: var(--surface);
    }

    .mermaid-card svg {
      display: block;
      width: 100%;
      min-height: 150px;
      padding: 22px;
      background: var(--surface);
    }

    .mermaid-card .mermaid-source {
      display: none;
    }

    .mermaid-edge {
      stroke: #9d9d9d;
      stroke-width: 1.3;
    }

    .mermaid-arrow {
      fill: #9d9d9d;
    }

    .mermaid-node {
      fill: #f2f2f2;
      stroke: #d8d8d8;
      stroke-width: 1;
    }

    .mermaid-label {
      fill: #242424;
      font-size: 13px;
      font-weight: 460;
      dominant-baseline: middle;
    }

    .code-card pre code,
    .mermaid-card pre code {
      padding: 0;
      border-radius: 0;
      background: transparent;
      font-family: var(--font-mono);
      font-size: 13px;
      line-height: 1.7;
      font-variant-ligatures: none;
      white-space: pre;
      overflow-wrap: normal;
      word-break: normal;
    }

    .copy-code-button {
      min-height: 24px;
      padding: 0 10px;
      border: 1px solid var(--line-strong);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.76);
      color: #050505;
      font-size: 12px;
      font-weight: 500;
      line-height: 1;
      transition: background 180ms ease, border-color 180ms ease;
    }

    .copy-code-button:hover {
      background: #fff;
      border-color: #c6c6c6;
    }

    .article-table-wrap {
      overflow-x: auto;
    }

    .article-content table {
      width: 100%;
      border-collapse: collapse;
      min-width: 640px;
    }

    .article-content th,
    .article-content td {
      padding: 15px 18px;
      border-bottom: 1px solid var(--line);
      text-align: left;
      vertical-align: top;
      font-size: 14px;
      line-height: 1.55;
    }

    .article-content th {
      color: #050505;
      font-weight: 520;
      background: rgba(255, 255, 255, 0.54);
    }

    .article-content figure {
      padding: 18px;
    }

    .article-content figure img {
      display: block;
      width: 100%;
      height: auto;
      border-radius: 6px;
      background: #fff;
    }

    .article-content figcaption {
      margin-top: 12px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .article-comments {
      border: 1px solid var(--line);
      border-radius: var(--radius-panel);
      background: var(--surface);
    }

    .article-series-nav {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .series-nav-card {
      min-height: 178px;
      position: relative;
      padding: 24px 26px 24px 28px;
      border: 1px solid var(--line);
      border-left: 4px solid var(--fg);
      border-radius: 0;
      display: grid;
      grid-template-rows: 16px minmax(64px, auto) minmax(42px, auto);
      align-content: end;
      gap: 14px;
      background: var(--surface);
      clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
      transition: transform 180ms ease, border-color 180ms ease;
    }

    .series-nav-card::after {
      content: "↗";
      position: absolute;
      top: 18px;
      right: 22px;
      color: var(--link);
      font-size: 18px;
      line-height: 1;
    }

    .series-nav-card:hover {
      transform: translateY(-2px);
      border-color: var(--line-strong);
    }

    .series-nav-card small {
      color: var(--link);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .article-comments small {
      color: var(--muted-2);
      font-size: 12px;
      font-weight: 520;
      line-height: 1;
    }

    .series-nav-card strong {
      color: #050505;
      font-size: clamp(22px, 2vw, 30px);
      font-weight: 300;
      line-height: 1.15;
    }

    .series-nav-card span {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.5;
    }

    .article-comments {
      padding: 28px;
    }

    .article-comments h2 {
      margin: 18px 0 0;
      color: #050505;
      font-size: clamp(24px, 2.2vw, 34px);
      font-weight: 300;
      line-height: 1.16;
    }

    .article-comments p {
      max-width: 660px;
      margin: 16px 0 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.68;
    }

    .article-scroll-actions {
      position: fixed;
      z-index: 40;
      right: max(var(--page-gutter), calc((100vw - var(--content-max)) / 2 - 58px));
      top: 50%;
      display: grid;
      gap: 8px;
      transform: translateY(-50%);
    }

    .article-scroll-actions a {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.86);
      color: #050505;
      font-size: 17px;
      line-height: 1;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    }

    @media (max-width: 1040px) {
      .nav {
        grid-template-columns: 1fr auto;
      }

      .nav-links {
        display: none;
      }

      .mobile-menu-toggle {
        display: grid;
      }

      .mobile-menu-panel {
        position: absolute;
        z-index: 45;
        top: calc(var(--nav-height) - 2px);
        left: var(--page-gutter);
        right: var(--page-gutter);
        display: grid;
        gap: 2px;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: var(--radius-panel);
        background: var(--surface);
        box-shadow: 0 12px 32px rgba(29, 29, 31, 0.1);
      }

      .mobile-menu-panel[hidden] {
        display: none;
      }

      .mobile-menu-panel a {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 14px;
        border-radius: 6px;
        color: #171717;
        font-size: 14px;
        font-weight: 520;
      }

      .mobile-menu-panel a::after {
        content: "→";
        color: var(--muted-2);
        font-size: 16px;
      }

      .mobile-menu-panel a:hover,
      .mobile-menu-panel a:focus-visible {
        background: var(--link-soft);
        outline: none;
      }

      .search-shell.open {
        width: min(300px, 56vw);
      }

      .brand-logo {
        width: 24px;
        height: 24px;
        flex-basis: 24px;
      }

      .hero-inner {
        grid-template-columns: 1fr;
      }

      .portrait-frame {
        justify-self: center;
        width: min(100%, 360px);
      }

      .hero-copy {
        justify-self: start;
      }

      .about-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 18px;
      }

      .about-intro-card {
        grid-row: auto;
        min-height: 480px;
      }

      .about-timeline,
      .about-capability-card {
        grid-column: auto;
        grid-row: auto;
      }

      .about-timeline {
        min-height: auto;
      }

      .about-capability-grid {
        grid-template-columns: 1fr;
      }

      .focus-strip,
      .work-grid,
    /* 文章页和产品页单卡区域：当前阶段只保留真实已有内容，不铺空占位。 */
    .article-grid,
      .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .article-hub {
        width: min(100%, 860px);
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
          "heading"
          "index"
          "library";
      }

      .article-index-panel {
        min-height: auto;
        width: 100%;
        padding: 0;
        transform: none;
        overflow: hidden;
      }

      .content-index-toggle {
        width: 100%;
        min-height: 64px;
        padding: 10px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        background: transparent;
        color: #050505;
        text-align: left;
      }

      .content-index-label {
        min-width: 0;
        display: grid;
        gap: 5px;
      }

      .content-index-label strong {
        font-size: 14px;
        font-weight: 680;
      }

      .content-index-label small {
        overflow: hidden;
        color: var(--muted);
        font-size: 12px;
        font-weight: 430;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .content-index-toggle > em {
        width: 32px;
        height: 32px;
        display: grid;
        place-items: center;
        flex: 0 0 32px;
        border: 1px solid var(--line-strong);
        border-radius: 999px;
        background: #fff;
        font-size: 17px;
        font-style: normal;
        font-weight: 350;
      }

      .content-index-toggle[aria-expanded="true"] > em {
        transform: rotate(45deg);
      }

      .content-index-toggle[aria-expanded="false"] + .content-index-body {
        display: none;
      }

      .content-index-body {
        padding: 0 18px 20px;
        border-top: 1px solid rgba(5, 5, 5, 0.08);
      }

      .content-index-body .article-index-head {
        display: none;
      }

      .content-index-body .article-index-tree {
        padding-top: 16px;
      }

      .article-library-panel {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: none;
      }

    /* 联系页布局：上方横向主卡，下方二维码和文字联系方式卡。 */
      .contact-shell {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-template-rows: auto;
        min-height: auto;
      }

      .contact-statement {
        grid-column: 1 / -1;
      }

      .contact-cooperation {
        margin-top: 26px;
      }

      .contact-visual-card {
        grid-column: 1 / -1;
        grid-row: auto;
        min-height: 300px;
        place-items: center;
      }

      .contact-link-stack {
        grid-column: 1 / -1;
        grid-row: auto;
        height: auto;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        grid-template-rows: auto;
      }

      .contact-link-stack .contact-card {
        min-height: 132px;
      }

      .contact-wechat-card,
      .contact-official-card,
      .contact-bilibili-card {
        grid-column: auto;
        grid-row: auto;
      }

      .detail-meta-grid {
        grid-template-columns: 1fr;
      }

      .article-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
          "breadcrumb"
          "hero"
          "toc"
          "main";
        gap: 22px;
      }

      .article-toc {
        position: static;
        width: 100%;
        max-height: none;
        margin-top: 0;
        padding: 0;
        transform: none;
        overflow: hidden;
      }

      .article-toc-toggle {
        width: 100%;
        min-height: 64px;
        padding: 10px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        background: transparent;
        color: #050505;
        text-align: left;
      }

      .article-toc-toggle span {
        font-size: 14px;
        font-weight: 680;
      }

      .article-toc-toggle em {
        width: 32px;
        height: 32px;
        display: grid;
        place-items: center;
        flex: 0 0 32px;
        border: 1px solid var(--line-strong);
        border-radius: 999px;
        background: #fff;
        font-size: 17px;
        font-style: normal;
        font-weight: 350;
      }

      .article-toc-toggle[aria-expanded="true"] em {
        transform: rotate(45deg);
      }

      .article-toc-toggle[aria-expanded="false"] + .article-toc-body {
        display: none;
      }

      .article-toc-body {
        padding: 0 18px 20px;
        border-top: 1px solid rgba(5, 5, 5, 0.08);
      }

      .article-toc-body > strong {
        display: none;
      }

      .article-toc-body ol {
        padding-top: 16px;
      }

      .article-back {
        display: none;
      }

      .article-search-shell {
        display: flex;
      }

      .article-lang-toggle,
      .article-mobile-menu-toggle {
        display: grid;
      }

      .article-series-nav {
        grid-template-columns: 1fr;
      }

      .article-scroll-actions {
        right: var(--page-gutter);
      }
    }

    @media (max-width: 780px) {
      :root {
        --nav-height: 66px;
        --page-gutter: 16px;
      }

      .nav {
        padding: 0 var(--page-gutter);
      }

      .brand {
        gap: 6px;
        font-size: 13px;
      }

      .nav-links {
        display: none;
      }

      .search-shell.open {
        width: calc(100vw - (var(--page-gutter) * 2) - 108px);
      }

      .nav.search-active .brand {
        width: 0;
        min-width: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
      }

      .search-panel {
        right: var(--page-gutter);
        width: calc(100vw - (var(--page-gutter) * 2));
        max-height: min(430px, calc(100vh - var(--nav-height) - 18px));
      }

      .search-filter-bar {
        flex-wrap: wrap;
      }

      .hero {
        padding: calc(var(--nav-height) + 54px) var(--page-gutter) 46px;
      }

      .hero-copy {
        padding-top: 0;
      }

      h1 {
        font-size: clamp(44px, 12vw, 58px);
      }

      .hero-statement {
        font-size: clamp(22px, 6vw, 30px);
      }

      .section {
        width: auto;
        margin: 0 var(--page-gutter);
        min-height: auto;
        padding: calc(var(--nav-height) + var(--content-frame-gap)) 0 var(--content-frame-gap);
        justify-content: flex-start;
      }

      .section-head {
        grid-template-columns: 1fr;
        gap: 22px;
      }

      .focus-strip,
      .work-grid,
      .about-timeline,
      .article-grid,
      .product-grid,
      .contact-shell {
        grid-template-columns: 1fr;
      }

      .article-grid-single,
      .product-grid-single {
        grid-template-columns: 1fr;
      }

      .product-console-card {
        grid-template-columns: 1fr;
      }

      .product-cover-orb {
        place-self: center;
      }

      .syncbridge-detail-hero {
        grid-template-columns: 1fr;
      }

      .syncbridge-console {
        min-height: 360px;
        border-top: 1px solid var(--line);
        border-left: 0;
      }

      .syncbridge-eyebrow {
        margin-top: 46px;
      }

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

      .syncbridge-fact-strip div:nth-child(2) {
        border-right: 0;
      }

      .syncbridge-fact-strip div:nth-child(-n + 2) {
        border-bottom: 1px solid var(--line);
      }

      .syncbridge-section-head {
        grid-template-columns: 1fr;
        gap: 12px;
      }

      .syncbridge-capability-grid {
        grid-template-columns: 1fr;
      }

      .syncbridge-feature-grid,
      .syncbridge-evidence-grid {
        grid-template-columns: 1fr;
      }

      .syncbridge-evidence-grid figure.is-wide {
        grid-column: 1;
      }

      .syncbridge-capability-grid article {
        min-height: 205px;
      }

      .syncbridge-capability-grid h6 {
        margin-top: 54px;
      }

      .syncbridge-workflow-list li,
      .syncbridge-boundary-table div {
        grid-template-columns: 52px minmax(0, 1fr);
      }

      .syncbridge-compatibility-panel {
        padding: 24px 20px;
      }

      .syncbridge-compatibility-panel ul {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .syncbridge-purchase-panel {
        grid-template-columns: 1fr;
        align-items: start;
      }

      .syncbridge-purchase-action {
        justify-items: start;
        text-align: left;
      }

      .syncbridge-detail-hero {
        gap: 20px;
        padding: 26px 0;
      }

      .syncbridge-hero-index {
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
        gap: 14px;
      }

      .syncbridge-hero-index::before {
        width: 28px;
        margin: 0;
      }

      .syncbridge-hero-copy .syncbridge-nameplate {
        margin-bottom: 28px;
      }

      .syncbridge-hero-copy .syncbridge-eyebrow {
        margin: 0 0 14px;
      }

      .syncbridge-core-flow,
      .syncbridge-command-strip,
      .syncbridge-pain-grid,
      .syncbridge-advantage-grid,
      .syncbridge-value-grid {
        grid-template-columns: 1fr;
      }

      .syncbridge-pain-grid article:not(:last-child) {
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }

      .syncbridge-pain-grid article {
        min-height: 145px;
      }

      .syncbridge-pain-grid h6 {
        margin-top: 24px;
      }

      .syncbridge-core-flow article {
        min-height: 190px;
      }

      .syncbridge-core-flow article > small {
        margin-top: 26px;
      }

      .syncbridge-command-strip article:not(:last-child) {
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }

      .syncbridge-content-section {
        padding-top: 82px;
      }

      .syncbridge-section-head {
        padding-top: 24px;
      }

      .syncbridge-pain-grid,
      .syncbridge-advantage-grid,
      .syncbridge-value-grid,
      .syncbridge-core-flow,
      .syncbridge-command-strip,
      .syncbridge-comparison-table {
        margin-top: 38px;
      }

      .syncbridge-primary-visual {
        margin-top: 82px;
      }

      .syncbridge-purchase-panel {
        margin-top: 86px;
        padding: 28px 22px;
      }

      .article-hub {
        grid-template-columns: 1fr;
        grid-template-areas:
          "heading"
          "index"
          "library";
      }

      .article-library-panel {
        grid-template-columns: 1fr;
        grid-template-areas: none;
      }

      .article-index-panel {
        width: 100%;
        transform: none;
      }

      .article-series-heading {
        min-height: 0;
        padding: 30px 0 32px;
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
          "meta"
          "title"
          "progress";
        gap: 14px;
      }

      .resource-series-heading,
      .product-series-heading {
        grid-template-areas:
          "meta"
          "title";
      }

      .info-card.product-console-card {
        grid-template-columns: 1fr;
      }

      .product-console-capabilities {
        display: grid;
        gap: 8px;
      }

      .product-console-capabilities span:not(:last-child)::after {
        display: none;
      }

      .product-cover-orb {
        width: min(100%, 228px);
        place-self: center;
      }

      .article-series-heading::before {
        inset: -1px auto auto 0;
        width: 118px;
        height: 2px;
      }

      .article-series-heading::after {
        top: auto;
        bottom: -1px;
        width: 82px;
      }

      .article-list-card {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
          "meta"
          "cardmeta"
          "title";
      }

      .article-card-meta {
        justify-content: start;
        flex-wrap: wrap;
      }

      .article-list-card strong {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
      }

      .about-intro-card {
        min-height: 420px;
      }

      .about-timeline::before {
        left: 29px;
        transform: none;
      }

      .timeline-node {
        grid-template-columns: 58px minmax(0, 1fr);
        gap: 14px;
      }

      .timeline-node span {
        grid-column: 1;
        width: 58px;
      }

      .timeline-node div,
      .timeline-node:nth-child(even) div {
        grid-column: 2;
        text-align: left;
      }

      .portrait-frame {
        width: min(100%, 320px);
      }

      .work-card {
        min-height: 286px;
      }

      .contact-statement {
        min-height: 220px;
        padding: 12px 0 28px;
      }

      .contact-cooperation {
        margin-top: 22px;
      }

      .contact-visual-card {
        min-height: 340px;
      }

      .contact-link-stack {
        grid-template-columns: 1fr;
      }

      .footer {
        margin: 0 var(--page-gutter);
        flex-direction: column;
        align-items: flex-start;
      }

      .article-page {
        padding: calc(var(--nav-height) + 40px) 16px 64px;
      }

      .article-hero {
        min-height: 0;
        border-radius: 0;
        padding: 30px 24px 34px;
      }

      .article-content {
        font-size: 15px;
      }

      .article-series-nav {
        grid-template-columns: 1fr;
      }

      .article-scroll-actions {
        right: var(--page-gutter);
      }

      .article-scroll-actions a {
        width: 34px;
        height: 34px;
      }
    }

    @media (max-width: 360px) {
      .syncbridge-detail-identity,
      .syncbridge-console,
      .syncbridge-purchase-panel {
        padding-right: 18px;
        padding-left: 18px;
      }

      .syncbridge-console-flow {
        grid-template-columns: 1fr;
        gap: 10px;
      }

      .syncbridge-console-flow > div {
        min-height: 132px;
      }

      .syncbridge-bridge {
        grid-template-columns: 1fr 1fr;
        padding: 0;
      }

      .syncbridge-fact-strip,
      .syncbridge-compatibility-panel ul {
        grid-template-columns: 1fr;
      }

      .syncbridge-fact-strip div,
      .syncbridge-fact-strip div:nth-child(2) {
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }

      .syncbridge-fact-strip div:last-child {
        border-bottom: 0;
      }
      /* 极窄屏保留品牌图形，把导航宽度优先留给搜索、语言和主菜单。 */
      .brand > span:last-child {
        display: none;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
      }
    }