:root {
        color-scheme: light dark;
        /* ---- light theme (default) ---- */
        --bg-0: #f6f8fa;
        --bg-1: #f6f8fa;
        --surface: #ffffff;
        --surface-raised: #ffffff;
        --panel: #ffffff;
        --panel-strong: #f6f8fa;
        --line: #d0d7de;
        --line-strong: #afb8c1;
        --text: #1f2328;
        --muted: #57606a;
        --accent: #0f8f83;
        --accent-2: #0969da;
        --accent-soft: rgba(15, 143, 131, 0.10);
        --warm: #9a6700;
        /* O-17 修复：--warn / --ok 此前被 13 处声明引用，却从未在任何主题里定义，
           var() 解析失败会导致整条声明被丢弃（如 .pkt-warn{fill} 实际没生效）。 */
        --warn: #9a6700;
        --ok: #1a7f37;
        --danger: #cf222e;
        --radius: 10px;
        --radius-sm: 7px;
        /* O-17：顶栏与内容区共用同一容器宽度，保证左基线对齐 */
        --shell: 1200px;
        --gutter: 24px;
        /* O-17：站内图标集的最小可用件（mask 用），避免再用 ✓ / ↗ 等文本字符当图标 */
        --ico-check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5.2 5.2L20 7'/%3E%3C/svg%3E");
        --shadow: 0 4px 16px rgba(31, 35, 40, 0.08);
        --glow: none;
        /* light-theme surface tokens (inset panels / code / hover) */
        --soft-bg: rgba(31, 35, 40, 0.04);
        --code-bg: rgba(175, 184, 193, 0.28);
        --code-text: #24292f;
        --pre-bg: #f0f3f6;
        --pre-text: #1f2328;
        --row-hover: rgba(31, 35, 40, 0.04);
        --qcard-hover: #f0f3f6;
        --syn-c: #6e7781;
        --syn-k: #8250df;
        --syn-s: #0a3069;
      }

      @media (prefers-color-scheme: dark) {
        :root:not([data-theme="light"]) {
          --bg-0: #0d1117;
          --bg-1: #0d1117;
          --surface: #161b22;
          --surface-raised: #21262d;
          --panel: #161b22;
          --panel-strong: #21262d;
          --line: rgba(177, 186, 196, 0.12);
          --line-strong: rgba(177, 186, 196, 0.24);
          --text: #e6edf3;
          --muted: #9198a1;
          --accent: #2dd4bf;
          --accent-2: #539bf5;
          --accent-soft: rgba(45, 212, 191, 0.12);
          --warm: #d29922;
          --warn: #d29922;
          --ok: #3fb950;
          --danger: #f85149;
          --shadow: 0 8px 24px rgba(1, 4, 9, 0.35);
          /* dark-theme surface tokens */
          --soft-bg: rgba(0, 0, 0, 0.25);
          --code-bg: rgba(0, 0, 0, 0.3);
          --code-text: #9fe8ff;
          --pre-bg: #070b16;
          --pre-text: #e6edf3;
          --row-hover: rgba(255, 255, 255, 0.03);
          --qcard-hover: #1a2029;
          --syn-c: #5c7080;
          --syn-k: #c586c0;
          --syn-s: #ce9178;
        }
      }

      /* explicit overrides win over system preference */
      :root[data-theme="light"] {
        --bg-0: #f6f8fa;
        --bg-1: #f6f8fa;
        --surface: #ffffff;
        --surface-raised: #ffffff;
        --panel: #ffffff;
        --panel-strong: #f6f8fa;
        --line: #d0d7de;
        --line-strong: #afb8c1;
        --text: #1f2328;
        --muted: #57606a;
        --accent: #0f8f83;
        --accent-2: #0969da;
        --accent-soft: rgba(15, 143, 131, 0.10);
        --warm: #9a6700;
        --warn: #9a6700;
        --ok: #1a7f37;
        --danger: #cf222e;
        --shadow: 0 4px 16px rgba(31, 35, 40, 0.08);
        --soft-bg: rgba(31, 35, 40, 0.04);
        --code-bg: rgba(175, 184, 193, 0.28);
        --code-text: #24292f;
        --pre-bg: #f0f3f6;
        --pre-text: #1f2328;
        --row-hover: rgba(31, 35, 40, 0.04);
        --qcard-hover: #f0f3f6;
        --syn-c: #6e7781;
        --syn-k: #8250df;
        --syn-s: #0a3069;
      }
      :root[data-theme="dark"] {
        --bg-0: #0d1117;
        --bg-1: #0d1117;
        --surface: #161b22;
        --surface-raised: #21262d;
        --panel: #161b22;
        --panel-strong: #21262d;
        --line: rgba(177, 186, 196, 0.12);
        --line-strong: rgba(177, 186, 196, 0.24);
        --text: #e6edf3;
        --muted: #9198a1;
        --accent: #2dd4bf;
        --accent-2: #539bf5;
        --accent-soft: rgba(45, 212, 191, 0.12);
        --warm: #d29922;
        --warn: #d29922;
        --ok: #3fb950;
        --danger: #f85149;
        --shadow: 0 8px 24px rgba(1, 4, 9, 0.35);
        --soft-bg: rgba(0, 0, 0, 0.25);
        --code-bg: rgba(0, 0, 0, 0.3);
        --code-text: #9fe8ff;
        --pre-bg: #070b16;
        --pre-text: #e6edf3;
        --row-hover: rgba(255, 255, 255, 0.03);
        --qcard-hover: #1a2029;
        --syn-c: #5c7080;
        --syn-k: #c586c0;
        --syn-s: #ce9178;
      }

      * { box-sizing: border-box; }

      html, body {
        margin: 0;
        padding: 0;
        min-height: 100%;
        background: var(--bg-0);
        color: var(--text);
        font-family: system-ui, -apple-system, "HarmonyOS Sans SC", "MiSans",
          "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
        font-size: 15px;
        line-height: 1.65;
        -webkit-font-smoothing: antialiased;
        transition: background-color 0.2s ease, color 0.2s ease;
      }
      /* color transitions for all themed surfaces */
      .sidebar, .viewbar, .panel, .diag-card, .modal, .user-menu,
      .qcard, .stat, .chip, .badge, .btn, input, textarea, select,
      table, th, td, .doc-callout, code, pre {
        transition: background-color 0.2s ease, border-color 0.2s ease,
                    color 0.2s ease;
      }

      body {
        background: var(--bg-0);
        background-attachment: fixed;
      }

      /* decorative aurora/grid backgrounds removed for a flat look */

      ::selection { background: rgba(45, 212, 191, 0.25); color: #eafffb; }

      ::-webkit-scrollbar { width: 10px; height: 10px; }
      ::-webkit-scrollbar-track { background: var(--bg-0); }
      ::-webkit-scrollbar-thumb {
        background: rgba(177, 186, 196, 0.28);
        border-radius: 999px; border: 2px solid var(--bg-0);
      }
      ::-webkit-scrollbar-thumb:hover { background: rgba(177, 186, 196, 0.45); }

      #progress {
        position: fixed; top: 0; left: 0; height: 2px; width: 0;
        background: var(--accent);
        z-index: 99; transition: width 0.08s linear;
      }

      /* ===== app shell ===== */
      /* 视觉隐藏但屏幕阅读器可读（O-10）：用于 <caption> 等有语义但不该显示的内容 */
      .sr-only {
        position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
        overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
      }
      .app { position: relative; z-index: 1; display: flex; min-height: 100vh; }

      .sidebar {
        position: fixed; top: 0; bottom: 0; left: 0;
        width: 236px; z-index: 40;
        display: flex; flex-direction: column;
        padding: 22px 14px 16px;
        background: var(--bg-0);
        border-right: 1px solid var(--line);
        overflow-y: auto;
      }

      .side-brand { display: flex; align-items: center; gap: 11px; padding: 0 8px; }
      .logo {
        width: 38px; height: 38px; flex: none;
        border-radius: 9px;
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.18);
        display: grid; place-items: center;
      }
      .side-name { font-weight: 800; font-size: 16.5px; letter-spacing: 0.5px; }
      .side-name em { font-style: normal; color: var(--muted); font-size: 12px; font-weight: 600; letter-spacing: 1px; }
      .side-tag {
        color: var(--muted); font-size: 9.5px; letter-spacing: 0.2em;
        text-transform: uppercase; margin-top: 3px; white-space: nowrap;
      }
      .side-tag .tag-dot { color: var(--accent); letter-spacing: 0; }

      .side-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; margin-top: 20px; }
      .side-group {
        font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
        color: var(--muted); opacity: 0.72;
        margin: 18px 10px 6px;
      }
      .side-nav .side-group:first-child { margin-top: 0; }
      /* ===== workspaces (collapsible groups) ===== */
      .ws { margin-bottom: 2px; }
      .ws-head {
        display: flex; align-items: center; gap: 8px;
        width: 100%; padding: 8px 10px;
        background: transparent; border: 0; border-radius: 8px;
        color: var(--muted); font-size: 12.5px; font-weight: 600;
        letter-spacing: 0.04em; cursor: pointer; text-align: left;
        transition: color 0.15s, background 0.15s;
      }
      .ws-head:hover { color: var(--text); background: var(--accent-soft); }
      .ws-ico { display: inline-flex; color: var(--muted); }
      .ws-head:hover .ws-ico { color: var(--accent); }
      /* 折叠箭头（O-09）：原先是 10px「▾」文字，颜色极淡几乎看不出可点击。
         换成 SVG chevron 并加深颜色，随折叠状态旋转。 */
      .ws-caret {
        margin-left: auto; display: inline-flex; align-items: center;
        color: var(--muted); transition: transform 0.2s;
      }
      .ws-caret svg { display: block; }
      .ws.collapsed .ws-caret { transform: rotate(-90deg); }
      .ws-body { overflow: hidden; transition: max-height 0.25s ease, opacity 0.2s; max-height: 400px; opacity: 1; }
      .ws.collapsed .ws-body { max-height: 0; opacity: 0; }
      /* 当前视图所在组高亮组头（O-09）——15 个入口不必一次性全亮 */
      .ws.active > .ws-head { color: var(--text); }
      .ws.active > .ws-head .ws-ico,
      .ws.active > .ws-head .ws-caret { color: var(--accent); }
      /* 侧栏内容超出视口时，底部渐隐提示「下面还有内容」（O-09）。
         类由 JS 按实际溢出/滚动位置增删，不溢出时完全不生效。 */
      .sidebar.has-more {
        -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 34px), transparent);
        mask-image: linear-gradient(to bottom, #000 calc(100% - 34px), transparent);
      }

      .side-link {
        position: relative;
        display: flex; align-items: center; gap: 9px;
        padding: 9px 13px; border-radius: 10px;
        color: var(--muted); font-size: 13.5px;
        cursor: pointer; user-select: none;
        /* 补 href 后是真链接，去掉浏览器默认下划线（N-02） */
        text-decoration: none;
        transition: color 0.18s ease, background 0.18s ease;
      }
      .side-link:hover { color: var(--text); background: var(--accent-soft); }
      .side-link.active {
        color: var(--text); font-weight: 600;
        background: var(--accent-soft);
      }
      .side-link.active::before {
        content: "";
        position: absolute; left: 0; top: 24%; bottom: 24%;
        width: 3px; border-radius: 3px;
        background: var(--accent);
      }
      /* external link entry (AIDC monitor platform jump) */
      .side-ext { color: var(--accent); }
      .side-ext:hover { color: var(--accent); }
      /* O-17：外链箭头统一用站内 SVG 图标集（原为 `↗` 文本字符，
         与侧栏 6 个分组的 24×24 stroke 图标不是同一套视觉语言）。 */
      .side-ext .ext-arrow {
        margin-left: auto; flex: none;
        width: 12px; height: 12px;
        opacity: 0.7;
        transition: transform 0.18s ease;
      }
      .side-ext:hover .ext-arrow { transform: translate(2px, -2px); }
      /* gated state: cluster not connected yet */
      .side-ext.aidc-gated {
        color: var(--muted); opacity: 0.5; cursor: not-allowed;
        background: transparent;
      }
      .qcard.aidc-gated {
        opacity: 0.45; cursor: not-allowed; filter: grayscale(0.6);
      }
      .aidc-mon-status {
        padding: 2px 12px 6px; font-size: 11px; line-height: 1.5;
        color: var(--muted); white-space: nowrap; overflow: hidden;
        text-overflow: ellipsis;
      }
      .aidc-mon-status.ok { color: #1a7f37; }
      .aidc-mon-status.bad { color: #9a6700; }
      /* 云机数据角标：标注硬件板块读自云服务器 /proc/sys，非用户本地 */
      .cloud-badge {
        display: inline-block;
        padding: 2px 10px;
        font-size: 11px;
        font-weight: 600;
        color: #9a6700;
        background: rgba(154,103,0,0.12);
        border-radius: 10px;
        cursor: help;
        white-space: nowrap;
      }
      @keyframes shake {
        0%,100% { transform: translateX(0); }
        25% { transform: translateX(-4px); }
        75% { transform: translateX(4px); }
      }

      .side-foot {
        margin-top: 18px; padding: 12px 12px;
        border: 1px solid var(--line); border-radius: 12px;
        background: var(--soft-bg);
        display: flex; flex-direction: column; gap: 6px;
      }
      .side-foot-sub {
        color: var(--muted); font-size: 11.5px;
        font-family: "JetBrains Mono", Consolas, monospace;
        letter-spacing: 0.02em;
      }

      .main {
        flex: 1; margin-left: 236px;
        display: flex; flex-direction: column; min-height: 100vh;
      }

      .viewbar {
        position: sticky; top: 0; z-index: 30;
        min-height: 60px;
        display: flex; align-items: center; justify-content: space-between;
        /* O-17：与 .content 共用同一容器宽度（--shell / --gutter），
           使顶栏左边缘与内容区左边缘落在同一条基线上（此前 1204px vs 1080px）。 */
        padding: 10px max(var(--gutter), calc((100% - var(--shell)) / 2 + var(--gutter)));
        border-bottom: 1px solid var(--line);
        background: var(--bg-0);
      }
      .view-title {
        font-weight: 700; font-size: 15px; letter-spacing: 0.02em;
        color: var(--text); line-height: 1.3;
      }
      .breadcrumb {
        font-size: 11.5px; color: var(--muted); margin-top: 2px;
        display: flex; align-items: center; gap: 6px;
      }
      .breadcrumb .bc-seg { color: var(--muted); }
      .breadcrumb .bc-seg:last-child { color: var(--text); font-weight: 500; }
      .breadcrumb .bc-sep { opacity: 0.4; }

      /* ===== 关键目标健康自检告警条（N-06）=====
         默认 hidden，只在启动探测发现关键目标不可达时出现。用 warn 色而非
         danger：资源不可达不等于站点坏了，主站自身仍然可用。
         类名用 selfcheck-bar 而非 health-bar —— 后者在下方"探测目标健康度"
         卡片里已被用作 4px 进度条（.health-bar i），两个组件同名会互相污染。 */
      .selfcheck-bar {
        display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
        margin: 14px 30px 0;
        padding: 10px 14px;
        border: 1px solid var(--line);
        border-left: 3px solid var(--warn, #d29922);
        border-radius: 8px;
        background: var(--soft-bg);
        font-size: 13px; color: var(--text);
      }
      .selfcheck-bar[hidden] { display: none; }
      .selfcheck-bar .health-text { flex: 1; min-width: 200px; line-height: 1.5; }
      .selfcheck-bar .health-retry {
        flex: none;
        font: inherit; font-size: 12.5px; font-weight: 600;
        padding: 5px 12px; border-radius: 6px; cursor: pointer;
        color: var(--text); background: var(--panel-strong);
        border: 1px solid var(--line);
      }
      .selfcheck-bar .health-retry:hover { border-color: var(--accent); color: var(--accent); }
      /* 自检判定为死链的入口：置灰 + 不可点，并标出原因 */
      .is-broken { opacity: 0.45; cursor: not-allowed; }
      .is-broken::after {
        content: '（不可达）';
        font-size: 11px; color: var(--muted); margin-left: 4px;
      }

      /* ===== 全局命令面板（N-12）=====
         侧栏 15 个入口分 6 组，外加入口若干 —— 找一个视图要逐级展开。
         Cmd/Ctrl+K 打开搜索式直达面板。开合复用 .modal-mask 的 .show 机制
         （连带复用既有焦点陷阱与 Esc 关闭），这里只补内部结构。 */
      .modal.cmdk {
        width: min(560px, calc(100% - 40px));
        padding: 0;
        overflow: hidden;
        align-self: flex-start;
        margin-top: 11vh;
        max-height: min(540px, calc(100vh - 22vh));
        display: flex; flex-direction: column;
        animation: pop 0.16s ease;
      }
      .cmdk-head {
        display: flex; align-items: center; gap: 10px;
        padding: 14px 16px;
        border-bottom: 1px solid var(--line);
        color: var(--muted);
      }
      .cmdk-head input {
        flex: 1; min-width: 0;
        background: none; border: 0; outline: none;
        color: var(--text); font: inherit; font-size: 15px;
      }
      .cmdk-head input::placeholder { color: var(--muted); }
      .cmdk-list { position: relative; flex: 1; overflow-y: auto; padding: 6px; }
      .cmdk-item {
        display: flex; align-items: center; gap: 10px;
        width: 100%; text-align: left;
        padding: 9px 11px; border-radius: 7px;
        border: 0; background: none; cursor: pointer;
        color: var(--text); font: inherit; font-size: 13.5px;
      }
      .cmdk-item .cmdk-ws {
        flex: none; margin-left: auto;
        color: var(--muted); font-size: 11.5px;
      }
      .cmdk-item[aria-selected="true"] { background: var(--accent-soft); }
      .cmdk-item[aria-selected="true"] .cmdk-ws { color: var(--accent); }
      .cmdk-empty {
        padding: 26px 14px; text-align: center;
        color: var(--muted); font-size: 13px;
      }
      .cmdk-foot {
        display: flex; gap: 14px; flex-wrap: wrap;
        padding: 9px 14px;
        border-top: 1px solid var(--line);
        color: var(--muted); font-size: 11.5px;
      }
      .cmdk-foot span { display: inline-flex; align-items: center; gap: 4px; }

      /* ===== 四态组件：空 / 加载 / 错误 / 无权限（O-18）=====
         此前四种状态各写各的（有的是一行灰字、有的临时拼个按钮），文案与结构都不统一。
         这里定成一套：状态图标 + 一句人话 + 一个明确的下一步。
         用法见 app.js 里的 TidalState.build/render。 */
      .state {
        display: flex; flex-direction: column; align-items: center;
        gap: 10px; text-align: center;
        padding: 26px 20px;
        border: 1px dashed var(--line);
        border-radius: 10px;
        background: var(--soft-bg);
        color: var(--muted); font-size: 13px;
      }
      .state .state-ico { opacity: .7; }
      .state .state-text { margin: 0; max-width: 48ch; line-height: 1.7; }
      .state .state-text b { color: var(--text); }
      .state .state-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
      .state-error { border-style: solid; border-color: var(--danger); }
      .state-error .state-text { color: var(--text); }
      .state-denied { border-style: solid; border-color: var(--line-strong); }
      /* 错误态：可展开的技术详情，普通访客默认不看 */
      .state details { width: 100%; text-align: left; }
      .state details summary { cursor: pointer; font-size: 12px; }
      .state details pre {
        margin: 8px 0 0; padding: 8px 10px; border-radius: 6px;
        background: var(--panel-strong); border: 1px solid var(--line);
        font: 11.5px/1.6 Consolas, monospace; color: var(--muted);
        white-space: pre-wrap; overflow-wrap: anywhere;
      }
      /* 加载态用骨架块而非"加载中…"文字，避免内容到位时的布局跳动 */
      .skel { display: flex; flex-direction: column; gap: 8px; width: 100%; }
      .skel i {
        display: block; height: 12px; border-radius: 6px;
        background: linear-gradient(90deg, var(--soft-bg) 25%, var(--line) 37%, var(--soft-bg) 63%);
        background-size: 400% 100%;
        animation: skel 1.4s ease infinite;
      }
      .skel i:nth-child(2) { width: 82%; }
      .skel i:nth-child(3) { width: 64%; }
      @keyframes skel { from { background-position: 100% 0; } to { background-position: 0 0; } }
      @media (prefers-reduced-motion: reduce) { .skel i { animation: none; } }
      kbd {
        display: inline-block;
        padding: 1px 5px; border-radius: 4px;
        border: 1px solid var(--line-strong);
        background: var(--soft-bg);
        font: 500 11px/1.5 Consolas, monospace;
        color: var(--muted);
      }
      .user-slot { position: relative; }
      .user-btn {
        display: inline-flex; align-items: center; gap: 9px;
        padding: 6px 12px 6px 6px;
        border-radius: 999px;
        border: 1px solid var(--line);
        background: rgba(255,255,255,0.03);
        color: var(--text); font-size: 13px; font-weight: 600;
        cursor: pointer; transition: border-color .15s, background .15s;
      }
      .user-btn:hover { border-color: rgba(45,212,191,0.4); background: rgba(255,255,255,0.06); }
      .user-btn.is-logged { border-color: rgba(45,212,191,0.45); }
      .user-avatar {
        width: 28px; height: 28px; border-radius: 50%;
        background: rgba(255,255,255,0.06);
        border: 1px solid rgba(255,255,255,0.18);
        display: grid; place-items: center; color: var(--accent);
        flex: none;
      }
      .user-avatar svg { display: block; }
      .user-caret { color: var(--muted); font-size: 10px; margin-left: 2px; transition: transform .15s; }
      .user-slot.open .user-caret { transform: rotate(180deg); }
      .user-menu {
        position: absolute; top: calc(100% + 8px); right: 0;
        width: 240px;
        background: var(--bg-1);
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: 0 12px 40px rgba(0,0,0,0.5);
        padding: 6px;
        opacity: 0; transform: translateY(-6px);
        pointer-events: none;
        transition: opacity .15s, transform .15s;
        z-index: 60;
      }
      .user-slot.open .user-menu { opacity: 1; transform: translateY(0); pointer-events: auto; }
      .user-menu .user-head {
        padding: 10px 12px 12px; border-bottom: 1px solid var(--line); margin-bottom: 4px;
      }
      .user-menu .user-head .uname { font-weight: 700; font-size: 14px; }
      .user-menu .user-head .usub { color: var(--muted); font-size: 11.5px; margin-top: 2px; }
      .user-menu .u-item {
        display: flex; align-items: center; gap: 10px;
        padding: 9px 12px; border-radius: 8px;
        color: var(--text); font-size: 13px; cursor: pointer;
        border: 0; background: transparent; width: 100%; text-align: left;
      }
      .user-menu .u-item:hover { background: rgba(255,255,255,0.06); }
      .user-menu .u-item svg { color: var(--muted); flex: none; }
      .user-menu .u-item.danger { color: var(--danger); }
      .user-menu .u-item.danger svg { color: var(--danger); }
      .user-menu .u-divider { height: 1px; background: var(--line); margin: 4px 6px; }

      /* ===== 网站账户登录（独立于"主机视角"） ===== */
      .account-slot { position: relative; }
      .acc-btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 5px 12px 5px 5px;
        border-radius: 999px;
        border: 1px solid var(--line);
        background: var(--soft-bg);
        color: var(--text); font-size: 13px; font-weight: 600;
        cursor: pointer; transition: border-color .15s, background .15s;
        font-family: inherit;
      }
      .acc-btn:hover { border-color: var(--accent); }
      .acc-avatar {
        width: 28px; height: 28px; border-radius: 50%;
        display: grid; place-items: center; flex: none;
        font-size: 15px; line-height: 1; color: #fff; font-weight: 700;
        overflow: hidden;
      }
      .acc-caret { color: var(--muted); font-size: 10px; transition: transform .15s; }
      .account-slot.open .acc-caret { transform: rotate(180deg); }
      .acc-menu {
        position: absolute; top: calc(100% + 8px); right: 0;
        width: 248px;
        background: var(--bg-1);
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: 0 12px 38px rgba(0,0,0,0.28);
        padding: 6px;
        opacity: 0; transform: translateY(-6px);
        pointer-events: none;
        transition: opacity .15s, transform .15s;
        z-index: 60;
      }
      .account-slot.open .acc-menu { opacity: 1; transform: translateY(0); pointer-events: auto; }
      .acc-menu .acc-head {
        padding: 10px 12px 12px; border-bottom: 1px solid var(--line); margin-bottom: 4px;
        display: flex; gap: 10px; align-items: center;
      }
      .acc-menu .acc-head .acc-meta { min-width: 0; }
      .acc-menu .acc-head .uname { font-weight: 700; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
      .acc-menu .acc-head .usub { color: var(--muted); font-size: 11.5px; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
      .acc-menu .u-item {
        display: flex; align-items: center; gap: 10px;
        padding: 9px 12px; border-radius: 8px;
        color: var(--text); font-size: 13px; cursor: pointer;
        border: 0; background: transparent; width: 100%; text-align: left;
        font-family: inherit;
      }
      .acc-menu .u-item:hover { background: var(--soft-bg); }
      .acc-menu .u-item svg { color: var(--muted); flex: none; }
      .acc-menu .u-item.danger { color: var(--danger); }
      .acc-menu .u-item.danger svg { color: var(--danger); }
      .acc-menu .u-divider { height: 1px; background: var(--line); margin: 4px 6px; }

      /* account modal: tabs / code row / profile editor */
      .acc-tabs { display: flex; gap: 4px; background: var(--soft-bg); border-radius: 10px; padding: 4px; margin-bottom: 18px; }
      .acc-tab {
        flex: 1; border: 0; background: transparent; padding: 8px 0;
        font-size: 13px; font-weight: 600; color: var(--muted);
        border-radius: 7px; cursor: pointer; font-family: inherit;
      }
      .acc-tab.active { background: var(--bg-1); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.12); }
      .acc-field { margin-bottom: 12px; }
      .acc-field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
      .acc-input-row { display: flex; align-items: center; gap: 8px; }
      .acc-prefix {
        padding: 9px 10px; font-size: 13px; font-weight: 600; color: var(--text);
        background: var(--soft-bg); border: 1px solid var(--line); border-radius: 8px; white-space: nowrap;
      }
      .acc-input {
        flex: 1; min-width: 0; padding: 9px 12px; font-size: 14px;
        background: var(--bg-1); color: var(--text);
        border: 1px solid var(--line); border-radius: 8px; font-family: inherit;
      }
      /* N-14：此处原为 outline: none，把 O-03 的全局焦点环吃掉了
         （.acc-input:focus 权重高于 :focus-visible），键盘用户看不到焦点位置。
         去掉后回归全局 :focus-visible 焦点环，边框变色仍保留。 */
      .acc-input:focus { border-color: var(--accent); }
      .acc-code-btn {
        padding: 9px 12px; font-size: 12.5px; font-weight: 600; white-space: nowrap;
        background: var(--accent-soft); color: var(--accent);
        border: 1px solid var(--accent); border-radius: 8px; cursor: pointer; font-family: inherit;
      }
      .acc-code-btn:disabled { opacity: .5; cursor: not-allowed; }
      .acc-hint {
        font-size: 12px; color: var(--warn); background: rgba(154,103,0,0.08);
        border: 1px dashed var(--warn); border-radius: 8px;
        padding: 7px 10px; margin-bottom: 12px; display: none;
      }
      .acc-hint.show { display: block; }
      /* 表单内联错误提示：与"演示验证码"提示分离，不互相覆盖 */
      .field-error {
        font-size: 12px; color: var(--danger); margin: -4px 0 10px;
        display: none; line-height: 1.5;
      }
      .field-error.show { display: block; }
      .acc-footnote { font-size: 11.5px; color: var(--muted); margin-top: 14px; line-height: 1.6; text-align: center; }
      .acc-full-btn {
        width: 100%; justify-content: center; margin-top: 2px;
      }
      /* profile editor */
      .acc-preview-row { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
      .acc-big-avatar { width: 56px; height: 56px; font-size: 28px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 700; overflow: hidden; }
      .acc-preview-row .acc-pv-meta { font-size: 12px; color: var(--muted); }
      .acc-emo-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; margin: 6px 0 12px; }
      .acc-emo {
        aspect-ratio: 1; border: 1px solid var(--line); border-radius: 8px;
        background: var(--bg-1); font-size: 17px; cursor: pointer; padding: 0;
        display: grid; place-items: center;
      }
      .acc-emo.active { border-color: var(--accent); background: var(--accent-soft); }
      .acc-color-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; margin: 6px 0 14px; }
      .acc-color {
        aspect-ratio: 1; border-radius: 50%; border: 2px solid transparent;
        cursor: pointer; padding: 0; position: relative;
      }
      .acc-color.active { border-color: var(--text); }
      .acc-bound-row {
        display: flex; justify-content: space-between; align-items: center;
        font-size: 13px; padding: 8px 0; border-top: 1px solid var(--line);
      }
      .acc-bound-row .acc-bv { color: var(--muted); }

      /* ===== 宽带测速（speedtest 风格） ===== */
      .st-layout {
        display: grid; grid-template-columns: 340px 1fr;
        gap: 28px; align-items: start;
      }
      .st-gauge-wrap {
        position: relative; width: 300px; height: 300px;
        margin: 4px auto 0;
      }
      #st-gauge { display: block; width: 300px; height: 300px; }
      .st-center {
        position: absolute; inset: 0;
        display: flex; flex-direction: column; align-items: center; justify-content: center;
        pointer-events: none;
      }
      .st-val {
        font-size: 42px; font-weight: 700; line-height: 1;
        font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
      }
      .st-unit { font-size: 12px; color: var(--muted); margin-top: 4px; letter-spacing: 0.12em; }
      .st-phase {
        font-size: 12.5px; color: var(--accent); font-weight: 600;
        margin-top: 10px;
      }
      .st-btn-row {
        position: absolute; left: 0; right: 0; bottom: -14px;
        display: flex; justify-content: center;
      }
      .st-btn-row .btn { min-width: 130px; justify-content: center; }
      .st-result-grid {
        display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
      }
      .st-metric {
        background: var(--soft-bg); border: 1px solid var(--line);
        border-radius: 10px; padding: 11px 14px;
      }
      .st-m-l { font-size: 11.5px; color: var(--muted); margin-bottom: 3px; }
      .st-m-v {
        font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums;
      }
      .st-m-v small { font-size: 11px; color: var(--muted); font-weight: 500; }
      .st-netinfo, .st-history { margin-top: 16px; }
      .st-ni-title {
        font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
        color: var(--muted); font-weight: 600; margin-bottom: 8px;
      }
      .st-ni-row {
        display: flex; justify-content: space-between; gap: 12px;
        font-size: 13px; padding: 7px 0; border-top: 1px solid var(--line);
      }
      .st-ni-row .st-ni-k { color: var(--muted); flex: none; }
      .st-ni-row .st-ni-valv { text-align: right; font-weight: 500; overflow: hidden; text-overflow: ellipsis; }
      .st-hist-row {
        display: grid; grid-template-columns: 1fr auto auto auto; gap: 10px;
        font-size: 12.5px; padding: 6px 0; border-top: 1px solid var(--line);
        font-variant-numeric: tabular-nums; align-items: center;
      }
      .st-hist-row .st-hist-time { color: var(--muted); }
      .st-hist-empty { font-size: 12.5px; color: var(--muted); padding: 4px 0; }
      @media (max-width: 900px) {
        .st-layout { grid-template-columns: 1fr; }
      }

      /* 表格内术语就地提示标记 */
      .term-tip {
        display: inline-flex; align-items: center; justify-content: center;
        width: 15px; height: 15px; border-radius: 50%;
        background: var(--accent-soft); color: var(--accent);
        font-size: 10px; font-weight: 700; font-style: normal;
        cursor: help; margin-left: 6px; vertical-align: middle;
      }

      /* ===== theme switcher ===== */
      .theme-slot { position: relative; }
      .theme-btn {
        width: 34px; height: 34px; border-radius: 8px;
        border: 1px solid var(--line);
        background: var(--surface);
        color: var(--text); cursor: pointer;
        display: grid; place-items: center;
      }
      .theme-btn:hover { border-color: var(--accent); color: var(--accent); }
      .theme-ico { display: block; }
      .theme-menu {
        position: absolute; top: calc(100% + 8px); right: 0;
        width: 160px;
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: var(--shadow);
        padding: 6px;
        opacity: 0; transform: translateY(-6px);
        pointer-events: none;
        transition: opacity .15s, transform .15s;
        z-index: 70;
      }
      .theme-slot.open .theme-menu { opacity: 1; transform: translateY(0); pointer-events: auto; }
      .theme-opt {
        display: flex; align-items: center; gap: 10px;
        padding: 8px 12px; border-radius: 8px;
        border: 0; background: transparent; color: var(--text);
        font-size: 13px; cursor: pointer; width: 100%; text-align: left;
      }
      .theme-opt:hover { background: var(--accent-soft); }
      .theme-opt.active { color: var(--accent); font-weight: 600; }
      .theme-status {
        padding: 8px 12px 4px; color: var(--muted); font-size: 11px;
        border-top: 1px solid var(--line); margin-top: 4px;
      }

      /* ===== optics end-to-end animation ===== */
      .opt-stage { background: var(--panel-strong); border-radius: 12px; padding: 12px; border: 1px solid var(--line); }
      .opt-legend { color: var(--muted); font-size: 12.5px; padding: 8px 4px 2px; }
      .opt-stage svg text { user-select: none; }

      /* VXLAN/EVPN packet walkthrough: each frame has an explicit control-plane
         prerequisite, data-plane action, and evidence boundary. */
      .vx-walk { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
      .vx-meta-bar { display: flex; flex-wrap: wrap; gap: 12px 18px; padding: 10px 16px; background: var(--panel-strong); border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); line-height: 1.5; }
      .vx-meta-bar b { color: var(--text); font-weight: 600; margin-right: 4px; }

      /* ===== Knowledge tree (AIDC 8-branch) ===== */
      .kt-body { display: grid; grid-template-columns: 280px 1fr; gap: 16px; margin-bottom: 22px; }
      .kt-tree { border: 1px solid var(--line); border-radius: 8px; padding: 12px 8px; max-height: 520px; overflow-y: auto; background: var(--surface); font-size: 13px; }
      .kt-node { cursor: pointer; padding: 4px 8px; border-radius: 4px; user-select: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
      .kt-node:hover { background: var(--accent-soft); }
      .kt-node.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
      .kt-node.kt-top { font-weight: 700; color: var(--text); margin-top: 6px; padding: 6px 8px; border-bottom: 1px solid var(--line); }
      .kt-node.kt-l2 { padding-left: 20px; font-weight: 500; color: var(--text); font-size: 12.5px; }
      .kt-node.kt-l3 { padding-left: 36px; color: var(--muted); font-size: 12px; }
      .kt-detail { border: 1px solid var(--line); border-radius: 8px; padding: 16px 18px; background: var(--surface); min-height: 300px; }
      .kt-detail h3 { margin: 0 0 4px; }
      .kt-detail .kt-path { font-size: 12px; color: var(--muted); margin-bottom: 12px; }
      .kt-detail table { width: 100%; font-size: 13px; }
      .kt-detail th { text-align: left; padding: 6px 10px; background: var(--panel-strong); border-bottom: 1px solid var(--line); font-weight: 600; font-size: 12px; }
      .kt-detail td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; line-height: 1.5; }
      .kt-guide { margin-top: 18px; }
      .kt-guide-title { font-size: 14px; font-weight: 600; color: var(--accent); margin: 0 0 8px; padding-bottom: 6px; border-bottom: 1px solid var(--accent-soft, rgba(31,111,235,0.2)); }
      .kt-guide-body { font-size: 13.5px; line-height: 1.75; color: var(--text); }
      .kt-guide-body h5 { font-size: 13.5px; font-weight: 600; margin: 16px 0 6px; color: var(--text); }
      .kt-guide-body p { margin: 0 0 10px; }
      .kt-guide-body ul, .kt-guide-body ol { margin: 0 0 10px; padding-left: 20px; }
      .kt-guide-body li { margin-bottom: 4px; }
      .kt-guide-body code { background: var(--panel-strong); padding: 1px 5px; border-radius: 3px; font-size: 12.5px; }
      .kt-guide-body pre { background: var(--panel-strong); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; overflow-x: auto; margin: 8px 0 12px; font-size: 12px; line-height: 1.5; }
      .kt-guide-body pre code { background: none; padding: 0; }
      .kt-guide-body .callout { background: rgba(31,111,235,0.06); border-left: 3px solid var(--accent); padding: 10px 14px; border-radius: 6px; margin: 10px 0; font-size: 13px; }
      /* AIDC 动画演示专区 */
      .aidc-svg { width: 100%; min-height: 200px; background: var(--panel-strong); border: 1px solid var(--line); border-radius: 8px; margin: 10px 0; }
      .aidc-svg .nd { fill: var(--panel); stroke: var(--line-strong); stroke-width: 1.5; rx: 6; }
      .aidc-svg .nd.active { stroke: var(--accent); stroke-width: 2.5; }
      .aidc-svg .nd-label { fill: var(--text); font-size: 11px; font-weight: 600; text-anchor: middle; }
      .aidc-svg .nd-sub { fill: var(--muted); font-size: 9.5px; text-anchor: middle; }
      .aidc-svg .link { stroke: var(--line-strong); stroke-width: 1.5; fill: none; }
      .aidc-svg .link.active { stroke: var(--accent); stroke-width: 2.5; }
      .aidc-svg .link.dashed { stroke-dasharray: 5 3; }
      .aidc-svg .pkt { fill: var(--accent); font-size: 10px; }
      .aidc-svg .pkt-warn { fill: var(--warn); }
      .aidc-svg .pkt-ok { fill: var(--ok); }
      .aidc-svg .pkt-danger { fill: var(--danger); }
      .aidc-svg .badge { fill: var(--accent-soft, rgba(31,111,235,0.15)); stroke: var(--accent); stroke-width: 1; rx: 3; }
      .aidc-svg .badge-text { fill: var(--accent); font-size: 9px; font-weight: 600; text-anchor: middle; }
      .aidc-svg .arrow { fill: var(--accent); }
      .aidc-svg .warn-arrow { fill: var(--warn); }
      .aidc-svg .queue-bar { fill: var(--line); rx: 2; }
      .aidc-svg .queue-fill { rx: 2; }
      .aidc-svg .queue-thresh { stroke: var(--warn); stroke-width: 1; stroke-dasharray: 3 2; }
      .aidc-svg .annot { fill: var(--muted); font-size: 9px; }
      .aidc-track { display: grid; grid-template-columns: repeat(8, minmax(118px, 1fr)); overflow-x: auto; background: var(--surface); }
      .aidc-step { min-height: 126px; padding: 13px 12px; border-right: 1px solid var(--line); cursor: pointer; background: var(--surface); color: var(--muted); }
      .aidc-step:last-child { border-right: 0; }
      .aidc-step:hover, .aidc-step.active { background: var(--accent-soft); color: var(--text); }
      .aidc-step.active { box-shadow: inset 0 3px 0 var(--accent); }
      .aidc-step b { display: block; margin-top: 4px; font-size: 13px; color: inherit; }
      .aidc-step span { display: block; margin-top: 5px; font-size: 11.5px; line-height: 1.45; }
      .aidc-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; margin-top: 10px; }
      .aidc-detail .vx-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
      .aidc-detail .vx-action { font-size: 13.5px; line-height: 1.6; margin-bottom: 8px; }
      .aidc-detail .vx-meta { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
      .aidc-detail pre { background: var(--panel-strong); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; font-size: 12px; overflow-x: auto; margin: 6px 0; white-space: pre-wrap; }
      @media (max-width: 768px) { .aidc-detail { grid-template-columns: 1fr; } }
      @media (max-width: 900px) { .kt-body { grid-template-columns: 1fr; } }
      .vx-head { padding: 14px 16px; background: var(--panel-strong); border-bottom: 1px solid var(--line); }
      .vx-head h3 { margin: 0; font-size: 15px; }
      .vx-head p { margin: 3px 0 0; color: var(--muted); font-size: 12.5px; }
      .vx-track { display: grid; grid-template-columns: repeat(8, minmax(118px, 1fr)); overflow-x: auto; background: var(--surface); }
      .vx-step { min-height: 126px; padding: 13px 12px; border-right: 1px solid var(--line); cursor: pointer; background: var(--surface); color: var(--muted); }
      .vx-step:last-child { border-right: 0; }
      .vx-step:hover, .vx-step.active { background: var(--accent-soft); color: var(--text); }
      .vx-step.active { box-shadow: inset 0 3px 0 var(--accent); }
      .vx-num { color: var(--accent); font: 700 12px Consolas, monospace; }
      .vx-step b { display: block; margin-top: 4px; font-size: 13px; color: inherit; }
      .vx-step span { display: block; margin-top: 5px; font-size: 11.5px; line-height: 1.45; }
      .vx-detail { display: grid; grid-template-columns: 1.15fr 1fr; gap: 0; border-top: 1px solid var(--line); }
      .vx-detail > div { padding: 15px 16px; min-height: 126px; }
      .vx-detail > div + div { border-left: 1px solid var(--line); background: var(--panel-strong); }
      .vx-label { color: var(--muted); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
      .vx-action { margin-top: 5px; font-size: 14px; font-weight: 600; }
      .vx-meta { margin-top: 7px; color: var(--muted); font-size: 12.5px; }
      .vx-packet { margin-top: 10px; padding: 8px 10px; border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--bg-0); font: 12px/1.55 Consolas, monospace; white-space: pre-wrap; }
      .vx-evidence a { color: var(--accent); }
      .vx-controls { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin: 12px 0; }
      @media (max-width: 720px) { .vx-detail { grid-template-columns: 1fr; } .vx-detail > div + div { border-left: 0; border-top: 1px solid var(--line); } }

      /* mode bar */
      .opt-mode-bar {
        display: flex; justify-content: space-between; align-items: center;
        padding: 10px 12px; margin-bottom: 12px;
        background: var(--panel-strong); border: 1px solid var(--line); border-radius: 10px;
        flex-wrap: wrap; gap: 10px;
      }
      .opt-mode {
        padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 600;
        border: 1px solid var(--line); background: var(--surface); color: var(--muted);
        cursor: pointer;
      }
      .opt-mode:hover { color: var(--text); }
      .opt-mode.active { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

      /* timeline */
      .opt-timeline {
        display: flex; align-items: center; gap: 2px;
        padding: 10px 12px; margin-bottom: 8px;
        background: var(--panel-strong); border: 1px solid var(--line); border-radius: 10px;
        overflow-x: auto;
      }
      .opt-tl-step {
        display: flex; flex-direction: column; align-items: center; gap: 4px;
        flex: 0 0 auto; min-width: 52px;
      }
      .opt-tl-ico {
        width: 26px; height: 26px; border-radius: 50%;
        display: grid; place-items: center;
        background: var(--surface); border: 1px solid var(--line);
        font-size: 12px; color: var(--muted);
        transition: all 0.2s;
      }
      .opt-tl-label { font-size: 11px; color: var(--muted); }
      .opt-tl-line { flex: 1; height: 2px; background: var(--line); min-width: 16px; }
      .opt-tl-step.done .opt-tl-ico { background: var(--accent); color: #fff; border-color: var(--accent); }
      .opt-tl-step.done .opt-tl-label { color: var(--accent); font-weight: 600; }
      .opt-tl-step.active .opt-tl-ico { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); animation: st-pulse 1s infinite; }
      .opt-tl-step.fail .opt-tl-ico { background: var(--danger); color: #fff; border-color: var(--danger); }
      .opt-tl-step.fail .opt-tl-label { color: var(--danger); font-weight: 600; }
      .opt-tl-line.done { background: var(--accent); }
      .opt-link { transition: stroke 0.4s; }
      .opt-node rect, .opt-node circle { transition: stroke 0.3s; }
      .opt-node.bad rect, .opt-node.bad circle { stroke: #ef4444; }
      .opt-link.bad { stroke: url(#opt-line-bad); }
      .opt-scene.active { background: var(--accent); color: #04110f; border-color: var(--accent); }
      @keyframes opt-shake {
        0%,100% { transform: translate(0,0); }
        20% { transform: translate(-3px,1px); }
        40% { transform: translate(3px,-1px); }
        60% { transform: translate(-2px,-1px); }
        80% { transform: translate(2px,1px); }
      }
      .opt-rabbit.shake { animation: opt-shake 0.4s ease-in-out 2; }
      @keyframes opt-bob {
        0%,100% { transform: translateY(0); }
        50% { transform: translateY(-3px); }
      }
      .opt-rabbit.bob { animation: opt-bob 0.5s ease-in-out infinite; }

      /* ===== 光链路：边界卡 / 教学台 / 实测台 ===== */
      .opt-scope-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin:0 0 22px; }
      .opt-scope-card { padding:13px 16px; border-radius:10px; border:1px solid var(--line); background:var(--panel-strong); }
      .opt-scope-card h4 { margin:0 0 6px; font-size:13.5px; display:flex; gap:7px; align-items:center; }
      .opt-scope-card p { margin:0; color:var(--muted); font-size:12.5px; line-height:1.65; }
      .opt-scope-card.thisway { border-left:3px solid var(--accent); }
      .opt-scope-card.notthis { border-left:3px solid var(--warn); }
      @media (max-width:760px){ .opt-scope-grid { grid-template-columns:1fr; } }

      .lab-banner { display:flex; align-items:center; gap:10px; padding:10px 15px; border:1px solid var(--line); border-bottom:0; border-radius:10px 10px 0 0; background:var(--panel-strong); font-size:13px; font-weight:700; }
      .lab-banner .lab-tag { font-size:11px; padding:2px 9px; border-radius:999px; font-weight:700; }
      .lab-banner .lab-tag.teach { background:var(--accent-soft); color:var(--accent); }
      .lab-banner .lab-tag.live { background:rgba(245,158,11,.15); color:var(--warn); }
      .lab-banner .lab-sub { font-weight:400; color:var(--muted); font-size:12px; margin-left:6px; }
      .lab-card { border:1px solid var(--line); border-radius:0 0 10px 10px; padding:14px 16px 18px; margin:0 0 26px; background:var(--panel); }

      .opt-timeline.fine { padding:10px 10px; }
      .opt-timeline.fine .opt-tl-step { min-width:44px; }
      .opt-timeline.fine .opt-tl-ico { width:24px; height:24px; font-size:11px; }
      .opt-timeline.fine .opt-tl-label { font-size:10.5px; }
      .opt-timeline.fine .opt-tl-line { min-width:8px; }

      .opt-stage { position:relative; border:1px solid var(--line); border-radius:10px; overflow:hidden;
                   background:radial-gradient(120% 130% at 50% 0%, rgba(45,212,191,.05), transparent 60%); }
      .opt-teach-note { margin-top:10px; padding:10px 12px; border-radius:8px; background:var(--soft-bg);
                        font-size:12.5px; color:var(--muted); line-height:1.7; }
      .opt-teach-note b { color:var(--text); }

      .opt-seg { transition:stroke .35s; }
      @keyframes seg-blink { 0%,100%{opacity:1} 50%{opacity:.2} }
      .opt-seg.bad { animation: seg-blink .65s ease-in-out infinite; }
      @keyframes node-alert { 0%,100%{ stroke:#ef4444 } 50%{ stroke:#fca5a5 } }
      .opt-nd.bad rect, .opt-nd.bad circle, .opt-nd.bad path.frame { stroke:#ef4444 !important; animation:node-alert .65s ease-in-out infinite; }
      .opt-nd.bad { filter: drop-shadow(0 0 6px rgba(239,68,68,.75)); }

      /* Agent 6 种接入方式卡 */
      .acc-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; }
      @media (max-width:900px){ .acc-grid { grid-template-columns:1fr 1fr; } }
      @media (max-width:600px){ .acc-grid { grid-template-columns:1fr; } }
      .acc-card { border:1px solid var(--line); border-radius:10px; padding:11px 13px; background:var(--panel-strong); }
      .acc-top { display:flex; align-items:center; gap:7px; font-weight:700; font-size:13px; color:var(--text); }
      .acc-dot { margin-left:auto; width:8px; height:8px; border-radius:50%; background:var(--line-strong); flex:none; }
      .acc-card.has-node .acc-dot { background:#3fb950; box-shadow:0 0 0 3px rgba(63,185,80,.15); }
      .acc-card code { display:block; margin:8px 0; font:10.5px/1.5 Consolas,monospace; color:var(--muted); word-break:break-all; }
      .acc-nodes { font-size:11px; color:var(--muted); line-height:1.5; }
      .acc-count { color:#3fb950; font-weight:700; }

      /* 实测台 */
      .lt-locked { text-align:center; padding:30px 20px 26px; color:var(--muted); }
      .lt-locked .lt-lock-ico { font-size:32px; opacity:.55; display:block; margin-bottom:10px; }
      .lt-locked p { margin:6px 0 0; font-size:12.5px; line-height:1.7; }
      .lt-items { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:14px; }
      @media (max-width:760px){ .lt-items { grid-template-columns:1fr; } }
      .lt-item { border:1px solid var(--line); border-radius:10px; padding:11px 13px; background:var(--panel-strong); scroll-margin-top:80px; }
      .lt-item.flash { box-shadow:0 0 0 2px var(--accent); transition:box-shadow .2s; }
      .lt-head { display:flex; align-items:center; justify-content:space-between; gap:8px; }
      .lt-head h5 { margin:0; font-size:13px; }
      .lt-status { font-size:11px; font-weight:700; padding:2px 9px; border-radius:999px; white-space:nowrap; }
      .lt-status.pass { background:rgba(16,185,129,.15); color:#34d399; }
      .lt-status.fail { background:rgba(239,68,68,.15); color:#f87171; }
      .lt-status.warn { background:rgba(245,158,11,.15); color:#fbbf24; }
      .lt-status.run { background:var(--accent-soft); color:var(--accent); }
      .lt-status.skip { background:rgba(148,163,184,.12); color:var(--muted); }
      .lt-ev { margin:7px 0 0; font:11.5px/1.55 Consolas,monospace; color:var(--muted); word-break:break-all; }
      .lt-minitopo { margin-top:6px; border-top:1px dashed var(--line); padding-top:6px; }
      .lt-fix { margin-top:8px; padding:7px 10px; border-radius:7px; background:rgba(245,158,11,.08);
                border-left:3px solid var(--warn); font-size:12px; color:#fcd34d; line-height:1.6; }
      .lt-summary { margin-top:16px; border:1px solid var(--line-strong); border-radius:10px;
                    padding:13px 16px; background:var(--panel-strong); display:flex; align-items:center; gap:12px; flex-wrap:wrap; }
      .lt-summary .lt-big { font-size:14.5px; font-weight:700; }
      .lt-anchors { display:flex; gap:7px; flex-wrap:wrap; margin-left:auto; }
      .lt-anchor { font-size:11.5px; padding:3px 10px; border-radius:999px; border:1px solid var(--danger);
                   color:#f87171; cursor:pointer; background:transparent; }
      .lt-anchor:hover { background:rgba(239,68,68,.12); }

      .content {
        flex: 1;
        width: 100%;
        max-width: var(--shell);
        margin: 0 auto;
        padding: 30px var(--gutter) 64px;
      }

      /* ===== hero / overview ===== */
      /* O-17：hero 改两栏（左 1.15fr 主张与入口 / 右 .85fr 实时态势），
         把原来空着的右半屏用起来；窄屏回落单栏。
         间距统一走 8pt 栅格：8 / 16 / 24 / 32。 */
      .hero {
        display: grid;
        grid-template-columns: 1.15fr .85fr;
        gap: 32px;
        align-items: start;
        padding: 32px 0 8px;
      }
      .hero-lead, .hero-side { min-width: 0; }
      /* 右栏里 command-deck 不再横向分两列（栏宽不够），改为上下堆叠 */
      .hero-side .command-deck { grid-template-columns: 1fr; margin: 0; }
      .hero-side .deck-primary { border-right: 0; border-bottom: 1px solid var(--line); }
      @media (max-width: 1080px) {
        .hero { grid-template-columns: 1fr; gap: 24px; }
        /* 回到单栏后宽度够了，command-deck 复原成左右两列 */
        .hero-side .command-deck { grid-template-columns: minmax(0, 1.42fr) minmax(260px, .88fr); }
        .hero-side .deck-primary { border-right: 1px solid var(--line); border-bottom: 0; }
      }
      .eyebrow {
        color: var(--accent); font-size: 12.5px; font-weight: 700;
        letter-spacing: 0.18em; text-transform: uppercase;
      }
      h1 {
        font-size: clamp(2.3rem, 5.4vw, 3.7rem);
        line-height: 1.08;
        margin: 14px 0 16px;
        letter-spacing: -0.02em;
        color: var(--text);
      }
      .lede { max-width: 700px; color: var(--muted); font-size: 1.03rem; margin: 0; }
      /* 两张入口卡（O-11）：左卡 = 免登录工具（大多数访客的路），
         右卡 = 项目档案（技术访客的路）。按钮行已取消，避免首屏出现三四个并列入口。 */
      .hero-entries {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(236px, 1fr));
        gap: 16px;
        margin-top: 32px;
      }
      .hero-entry {
        display: flex; flex-direction: column; gap: 8px;
        padding: 22px;          /* O-17：并入卡片标准档（原 16px 是第四种尺寸） */
      }
      .hero-entry.is-primary { border-color: var(--line-strong); }
      .hero-entry .he-title { font-size: 14.5px; font-weight: 700; color: var(--text); }
      .hero-entry .he-sub { margin: 0; font-size: 12px; color: var(--muted); }
      .he-links { display: flex; flex-direction: column; gap: 8px; }
      .he-link {
        display: flex; flex-direction: column; gap: 2px;
        width: 100%; text-align: left;
        padding: 8px 10px;
        border: 1px solid transparent; border-radius: 8px;
        background: var(--soft-bg);
        color: var(--text); font-family: inherit;
        font-size: 13px; font-weight: 600;
        text-decoration: none; cursor: pointer;
      }
      .he-link em { font-style: normal; font-size: 11.5px; font-weight: 400; color: var(--muted); }
      .he-link:hover { border-color: var(--accent); background: var(--accent-soft); }

      /* 需登录入口的锁标识（O-11）：默认隐藏，syncLoginUi() 按真实登录态显示。
         只加锁图标不够 —— title / aria-label 里也写明"需要主机管理权限"，
         否则读屏用户与鼠标用户都无从得知。 */
      .lock-ico { display: none; margin-left: 6px; opacity: .7; vertical-align: -1px; }
      .side-link.needs-login .lock-ico { display: inline-block; }

      /* Live command deck: these values are populated only from local APIs. */
      .command-deck {
        position: relative; overflow: hidden;
        display: grid; grid-template-columns: minmax(0, 1.42fr) minmax(260px, .88fr);
        gap: 0; margin: 30px 0 0; border: 1px solid var(--line-strong);
        border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow);
      }
      .command-deck::before {
        content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .36;
        background-image: linear-gradient(rgba(45,212,191,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(45,212,191,.06) 1px, transparent 1px);
        background-size: 28px 28px;
        mask-image: linear-gradient(90deg, #000, transparent 76%);
      }
      .deck-primary, .deck-health { position: relative; padding: 18px 20px; }
      .deck-primary { border-right: 1px solid var(--line); }
      .deck-kicker { display:flex; align-items:center; gap:8px; font: 700 11px/1 Consolas, monospace; letter-spacing:.12em; color:var(--accent); }
      .signal-dot { width:8px; height:8px; border-radius:50%; background:var(--accent); box-shadow:0 0 0 4px var(--accent-soft); animation: signal-pulse 1.8s ease-out infinite; }
      @keyframes signal-pulse { 0%,100% { box-shadow:0 0 0 4px var(--accent-soft); } 50% { box-shadow:0 0 0 9px transparent; } }
      .deck-primary h2 { margin:12px 0 5px; font-size:18px; letter-spacing:0; }
      .deck-desc { margin:0; color:var(--muted); font-size:12.5px; }
      .metric-row { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:17px; }
      .live-metric { min-width:0; padding:10px 11px; border:1px solid var(--line); background:var(--soft-bg); }
      .live-metric span { display:block; color:var(--muted); font-size:11px; }
      .live-metric strong { display:block; margin-top:3px; font:700 18px/1.25 Consolas,monospace; color:var(--text); font-variant-numeric:tabular-nums; white-space:normal; overflow-wrap:anywhere; }
      .deck-health { display:flex; flex-direction:column; justify-content:space-between; gap:16px; }
      .deck-health-top { display:flex; align-items:flex-start; justify-content:space-between; gap:10px; }
      .deck-label { color:var(--muted); font-size:11px; letter-spacing:.09em; text-transform:uppercase; }
      .health-score { margin-top:3px; font:700 28px/1 Consolas,monospace; color:var(--accent); font-variant-numeric:tabular-nums; }
      .health-list { display:flex; flex-direction:column; gap:8px; }
      .health-item { display:grid; grid-template-columns:minmax(0,1fr) 52px; gap:9px; align-items:center; font:12px/1.2 Consolas,monospace; }
      .health-item span { overflow:hidden; white-space:nowrap; text-overflow:ellipsis; color:var(--muted); }
      .health-bar { height:4px; overflow:hidden; background:var(--line); }
      .health-bar i { display:block; height:100%; width:100%; background:var(--accent); transition:width .5s ease, background .2s ease; }
      .deck-foot { color:var(--muted); font-size:11px; font-variant-numeric:tabular-nums; }
      .deck-offline .signal-dot, .deck-offline .health-score { background:var(--danger); color:var(--danger); }
      .deck-offline .signal-dot { box-shadow:0 0 0 4px rgba(248,81,73,.12); animation:none; }
      .deck-offline .health-bar i { background:var(--danger); }
      @media (max-width: 768px) { .command-deck { grid-template-columns:1fr; } .deck-primary { border-right:0; border-bottom:1px solid var(--line); } }
      @media (max-width: 440px) { .metric-row { grid-template-columns:1fr 1fr; } .metric-row .live-metric:last-child { grid-column:span 2; } }

      /* quick launch cards */
      .quick-grid {
        display: grid; gap: 13px;
        grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
        margin: 34px 0 10px;
      }
      .qcard {
        display: flex; flex-direction: column; gap: 3px;
        padding: 17px 18px;
        border-radius: var(--radius);
        border: 1px solid var(--line);
        background: var(--panel);
        cursor: pointer; text-decoration: none;
        transition: border-color 0.18s ease, background 0.18s ease;
      }
      .qcard:hover {
        border-color: var(--line-strong);
        background: var(--qcard-hover);
      }
      .q-ico {
        width: 38px; height: 38px; border-radius: 10px;
        display: grid; place-items: center; font-size: 19px;
        background: var(--accent-soft); margin-bottom: 8px;
      }
      .q-ico svg { display: block; }
      .qcard b { font-size: 14.5px; }
      .q-sub { color: var(--muted); font-size: 12.5px; }

      /* ===== buttons ===== */
      .btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 10px 20px; border-radius: 8px;
        font-size: 14px; font-weight: 600; cursor: pointer;
        border: 1px solid transparent;
        font-family: inherit;
        transition: background 0.18s, border-color 0.18s, color 0.18s;
        text-decoration: none;
      }
      .btn:active { transform: translateY(1px); }
      .btn-primary {
        background: var(--accent);
        color: #052e28;
      }
      .btn-primary:hover { background: #26b8a5; }
      .btn-ghost {
        background: transparent; color: var(--text);
        border-color: var(--line-strong);
      }
      .btn-ghost:hover { border-color: var(--line-strong); background: var(--soft-bg); }

      /* ===== badges / chips ===== */
      .badge {
        display: inline-flex; align-items: center; gap: 7px;
        padding: 4px 11px; border-radius: 999px;
        border: 1px solid rgba(45, 212, 191, 0.3);
        background: var(--accent-soft);
        color: var(--accent); font-size: 12.5px; font-weight: 600;
      }
      /* O-17：状态点统一为 .dot 组件，四态用「形状 + 颜色」双重编码 ——
         ok 实心圆 · warn 菱形 · bad 方块 · idle 空心环。
         灰度打印或色盲用户下，仅凭形状也能分辨状态（WCAG 1.4.1）。
         语义色 --ok / --warn / --danger 均已在四个主题里定义。 */
      .dot {
        width: 8px; height: 8px; flex: none;
        border-radius: 50%; background: var(--accent);
      }
      .dot.ok { background: var(--ok); }
      .dot.warn { background: var(--warn); border-radius: 2px; transform: rotate(45deg); }
      .dot.bad { background: var(--danger); border-radius: 1px; }
      .dot.idle { background: transparent; border: 1.5px solid var(--muted); }

      .chip {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 7px 14px; border-radius: 999px;
        border: 1px solid var(--line-strong);
        background: var(--panel);
        font-family: "JetBrains Mono", Consolas, monospace;
        font-size: 12.5px; color: var(--muted);
        transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
      }
      .chip b { color: var(--accent); font-weight: 700; }
      .chip:hover { border-color: var(--line-strong); color: var(--text); }

      /* ===== 首屏「用户能感知的价值」行（O-15） =====
         原来这个位置放的是 Reactor/epoll/端口/TLS 这排引擎内部参数，普通访客看不懂，
         且其中 HTTPS :8443 当时并不可用。改为陈述用户关心的事实，技术参数收进
         下方可展开的「技术详情 ▾」，兼顾技术访客与普通访客。 */
      .hero-facts {
        margin-top: 20px; display: flex; gap: 9px 18px; flex-wrap: wrap; align-items: center;
        color: var(--muted); font-size: 13px;
      }
      .hero-facts .fact { display: inline-flex; align-items: center; gap: 6px; }
      /* O-17：此前的 '✓' 是字体字符，各设备字形差异大；
         改用站内图标集的同款 stroke SVG（走 mask，颜色仍由 --accent 控制）。 */
      .hero-facts .fact::before {
        content: ''; flex: none;
        width: 13px; height: 13px;
        background: var(--accent);
        -webkit-mask: var(--ico-check) center / contain no-repeat;
        mask: var(--ico-check) center / contain no-repeat;
      }
      .hero-facts .fact b { color: var(--text); font-variant-numeric: tabular-nums; }
      .tech-details { margin-top: 14px; }
      .tech-details > summary {
        display: inline-flex; align-items: center; gap: 6px;
        cursor: pointer; list-style: none;
        color: var(--muted); font-size: 12.5px; user-select: none;
        padding: 5px 2px; border-radius: 6px;
      }
      .tech-details > summary::-webkit-details-marker { display: none; }
      .tech-details > summary::after {
        content: '▾'; font-size: 10px; transition: transform 0.2s;
      }
      .tech-details[open] > summary::after { transform: rotate(180deg); }
      .tech-details > summary:hover { color: var(--text); }
      .tech-details .tech-chips {
        display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
        margin-top: 10px;
      }
      .tech-details .chip em { font-style: normal; opacity: 0.75; }

      /* ===== stats ===== */
      .stats {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 14px;
        margin: 36px 0 10px;
      }
      /* 小屏：概览统计卡从 4 列降为 2 列，消除横向滚动 */
      @media (max-width: 768px) {
        .stats { grid-template-columns: repeat(2, 1fr); }
        .metric-row { grid-template-columns: repeat(2, 1fr); }
      }
      .stat {
        position: relative;
        padding: 22px;          /* O-17：并入卡片标准档 */
      }
      .stat .k { color: var(--muted); font-size: 13px; }
      .stat .v {
        font-size: 1.7rem; font-weight: 700; margin-top: 4px;
        color: var(--text);
        font-variant-numeric: tabular-nums;
      }
      .stat .v small { font-size: 13px; color: var(--muted); font-weight: 500; margin-left: 4px; }

      /* ===== 数字与单位排版规范（O-08）=================================
         全站新增数值展示一律遵守以下 7 条，避免"同一屏五种写法"：
           1) 数字与单位之间用细空格，HTML 写 &thinsp;（比普通空格窄、比无空格清楚）
           2) 单位一律小写：ms / s / req/s / mbps / gb
           3) 速率统一写 req/s（不写 /s、RPS；RPS 只作为指标名保留在大写标题里）
           4) 时长统一写「N 小时 N 分钟 N 秒」（带空格），不写 1时2分3秒
           5) 比值写 A/B（如 6/6），斜杠两侧不加空格
           6) 数值容器一律加 .num —— tabular-nums 让等宽数字对齐，刷新时不跳字宽
           7) 中英文之间补一个空格
         ================================================================= */
      .num, .stat .v, .live-metric strong, .health-score, .deck-foot,
      td.num, .live-row span:last-child { font-variant-numeric: tabular-nums; }
      /* 基准数据卡（O-15）：虚线边框 + 斜纹底，与上方实时卡（实线）区分 */
      .stat-bench {
        border-style: dashed;
        background-image: repeating-linear-gradient(45deg, var(--soft-bg) 0 8px, transparent 8px 16px);
      }
      .stat-bench:hover { border-color: var(--line-strong); }
      .stats-bench-note {
        grid-column: 1 / -1; margin-bottom: -4px;
        color: var(--muted); font-size: 12px;
      }
      .stats-bench-note b { color: var(--text); font-weight: 600; }

      /* ===== sections / panels ===== */
      section { padding: 26px 0 18px; }
      .section-head {
        display: flex; align-items: baseline; justify-content: space-between;
        margin-bottom: 18px; gap: 12px; flex-wrap: wrap;
      }
      .section-head h2 { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; }
      .hint { color: var(--muted); font-size: 13px; }

      /* 需要主机管理权限时的页内提示条（含「去登录」入口） */
      .perm-banner {
        display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
        padding: 12px 14px; margin-bottom: 14px; border-radius: 10px;
        background: rgba(245, 185, 95, 0.10); border: 1px solid var(--warn);
        font-size: 13px; line-height: 1.5;
      }
      .perm-banner .perm-ico { font-size: 16px; }
      .perm-banner .perm-text { flex: 1 1 320px; min-width: 0; }
      .perm-banner .btn { padding: 5px 14px; font-size: 12.5px; }

      .panel { display: none; }
      .panel.active { display: block; animation: viewin 0.22s ease; }
      @keyframes viewin {
        from { opacity: 0; }
        to { opacity: 1; }
      }

      /* ===== cards ===== */
      .grid {
        display: grid; gap: 14px;
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      }
      /* ===== 卡片三档（O-17）=============================================
         全站只允许这三种尺寸（间距走 8pt 栅格：8 / 16 / 24 / 32）：
           .card-lg  主卡 —— hero 入口卡、并列主区块     padding 24px 26px
           .card     标准卡 —— 特性卡 / 指标卡            padding 22px
           .card-sm  微卡 —— 内嵌事实条级                 padding 12px 14px
         三档共用同一套背景 / 描边 / 圆角与 hover，
         只在内边距与标题字号上区分，不再出现第四种尺寸。
         .stat（概览指标卡）与 .hero-entry（入口卡）并入标准档。 */
      .card-lg, .card, .card-sm, .stat, .hero-entry {
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        transition: border-color 0.18s ease;
      }
      .card-lg:hover, .card:hover, .card-sm:hover,
      .stat:hover, .hero-entry:hover { border-color: var(--line-strong); }
      .card-lg { padding: 24px 26px; }
      .card-lg > h2, .card-lg .he-title { font-size: 16px; }
      .card-sm { padding: 12px 14px; border-radius: 8px; }
      .card-sm > h4, .card-sm .k { font-size: 13px; }
      .card {
        padding: 22px;
        cursor: default;
      }
      .card .icon {
        width: 42px; height: 42px; border-radius: 11px;
        display: grid; place-items: center;
        background: var(--accent-soft); color: var(--accent);
        font-size: 20px; font-weight: 800;
        margin-bottom: 14px;
      }
      .card .icon svg { display: block; }
      .card h3 { margin: 0 0 6px; font-size: 1.05rem; }
      .card p { margin: 0; color: var(--muted); font-size: 14px; }

      /* ===== architecture ===== */
      .arch {
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 30px;
        overflow-x: auto;
      }
      .flow {
        display: flex; align-items: center; justify-content: center;
        gap: 14px; flex-wrap: wrap; min-width: 760px;
      }
      .node {
        padding: 14px 18px; border-radius: 12px;
        background: var(--panel-strong);
        border: 1px solid var(--line-strong);
        font-size: 13.5px; font-weight: 600; text-align: center;
        min-width: 110px;
        transition: all 0.2s;
      }
      .node.reactor {
        border-color: var(--accent);
        color: var(--accent);
      }
      .node:hover { border-color: var(--line-strong); }
      .arrow { color: var(--muted); font-size: 18px; }
      .arch-note {
        margin-top: 22px; padding: 14px 16px;
        background: rgba(79, 139, 255, 0.08);
        border-left: 3px solid var(--accent-2);
        border-radius: 0 8px 8px 0;
        color: var(--muted); font-size: 13.5px;
      }

      /* ===== tables ===== */
      table {
        width: 100%; border-collapse: collapse;
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        overflow: hidden;
      }
      th, td {
        padding: 12px 16px; text-align: left;
        border-bottom: 1px solid var(--line);
        font-size: 14px;
      }
      th {
        background: var(--panel-strong);
        color: var(--muted); font-weight: 600; font-size: 12.5px;
        text-transform: uppercase; letter-spacing: 0.05em;
      }
      tr:last-child td { border-bottom: none; }
      tr:hover td { background: var(--row-hover); }
      td.num { font-variant-numeric: tabular-nums; color: var(--accent); font-weight: 600; }
      code {
        font-family: "JetBrains Mono", Consolas, monospace;
        font-size: 12.5px; color: var(--code-text);
        background: var(--code-bg);
        padding: 1px 6px; border-radius: 6px;
      }

      /* ===== code block ===== */
      pre {
        background: var(--pre-bg);
        color: var(--pre-text);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 18px 20px;
        overflow-x: auto;
        font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
        font-size: 13px;
        line-height: 1.7;
      }
      .c { color: var(--syn-c); }
      .k { color: var(--syn-k); }
      .s { color: var(--syn-s); }
      .f { color: var(--accent); }

      /* ===== timeline ===== */
      .timeline { display: grid; gap: 10px; }
      .tl-item {
        display: grid; grid-template-columns: 120px 1fr;
        gap: 16px; padding: 14px 18px;
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius-sm);
        transition: all 0.2s;
      }
      .tl-item:hover { border-color: var(--accent-2); }
      .tl-tag {
        font-size: 12px; color: var(--accent); font-weight: 700;
        letter-spacing: 0.05em; padding-top: 2px;
      }
      .tl-body { color: var(--muted); font-size: 14px; }
      .tl-body strong { color: var(--text); }

      /* ===== live panel ===== */
      .live-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
      .live-card {
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 18px 20px;
      }
      .live-card h4 {
        margin: 0 0 12px; font-size: 13px; color: var(--muted);
        font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
      }
      .live-row {
        display: flex; justify-content: space-between;
        padding: 7px 0; font-size: 14px;
        border-bottom: 1px dashed var(--line);
      }
      .live-row:last-child { border-bottom: none; }
      .live-row span:first-child { color: var(--muted); }
      .live-row span:last-child { color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; }

      /* ===== diagnostics ===== */
      .diag-grid {
        display: grid; gap: 14px;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      }
      .diag-card {
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 22px;
        display: flex; flex-direction: column; gap: 14px;
        transition: border-color 0.18s ease;
      }
      .diag-card:hover {
        border-color: var(--line-strong);
      }
      .diag-head { display: flex; gap: 14px; align-items: flex-start; }
      .diag-icon {
        width: 44px; height: 44px; border-radius: 12px;
        display: grid; place-items: center; font-size: 22px;
        background: var(--accent-soft); color: var(--accent); flex-shrink: 0;
      }
      .diag-icon svg { display: block; }
      .diag-head h3 { margin: 0 0 4px; font-size: 1.05rem; }
      .diag-head p { margin: 0; color: var(--muted); font-size: 13px; }
      .diag-btn { align-self: flex-start; }
      .diag-btn:disabled { opacity: 0.6; cursor: not-allowed; }
      .diag-result {
        font-size: 14px; color: var(--text);
        padding: 12px 14px; border-radius: 10px;
        background: var(--soft-bg);
        border: 1px solid var(--line);
        font-variant-numeric: tabular-nums; min-height: 44px;
        word-break: break-word;
      }
      .diag-result.diag-code {
        font-family: "JetBrains Mono", Consolas, monospace;
        font-size: 12.5px; white-space: pre-wrap;
      }
      .diag-result .ok { color: var(--accent); font-weight: 600; }
      .diag-result .muted { color: var(--muted); font-size: 12.5px; }
      .muted { color: var(--muted); }
      .ok { color: var(--accent); font-weight: 600; }
      .diag-input {
        flex: 1; min-width: 120px;
        padding: 10px 12px; border-radius: 10px;
        border: 1px solid var(--line-strong);
        background: var(--soft-bg); color: var(--text);
        font-size: 14px;
        transition: border-color 0.2s, box-shadow 0.2s;
        font-family: inherit;
      }
      .diag-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15); }
      .diag-input::placeholder { color: rgba(140, 160, 192, 0.55); }
      .status-pill {
        display: inline-flex; align-items: center; gap: 6px;
        padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
      }
      .status-online {
        color: var(--accent); background: var(--accent-soft);
        border: 1px solid rgba(46, 230, 200, 0.35);
      }
      .status-offline {
        color: var(--muted); background: rgba(140, 160, 192, 0.08);
        border: 1px solid var(--line-strong);
      }

      /* ===== unified state component ===== */
      .st {
        display: inline-flex; align-items: center; gap: 6px;
        padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
        border: 1px solid transparent; white-space: nowrap;
      }
      .st::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
      .st-ok { color: var(--accent); background: var(--accent-soft); border-color: rgba(45,212,191,0.3); }
      .st-warn { color: var(--warm); background: rgba(210,153,34,0.12); border-color: rgba(210,153,34,0.35); }
      .st-fail { color: var(--danger); background: rgba(248,81,73,0.12); border-color: rgba(248,81,73,0.35); }
      .st-run { color: var(--accent-2); background: rgba(83,155,245,0.12); border-color: rgba(83,155,245,0.35); }
      .st-run::before { animation: st-pulse 1s infinite; }
      .st-pending { color: var(--muted); background: rgba(140,160,192,0.08); border-color: var(--line-strong); }
      .st-expired { color: var(--danger); background: rgba(248,81,73,0.08); border-color: var(--line-strong); }
      @keyframes st-pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

      /* task id pill */
      .task-id {
        font-family: "SF Mono", "Cascadia Code", "Consolas", monospace;
        font-size: 12px; color: var(--muted);
        background: var(--panel-strong);
        border: 1px solid var(--line);
        padding: 2px 8px; border-radius: 6px;
      }

      /* decorative hover light-line removed */

      .diag-result.loading {
        background: linear-gradient(100deg, rgba(255,255,255,0.04) 40%, rgba(255,255,255,0.10) 50%, rgba(255,255,255,0.04) 60%);
        background-size: 200% 100%;
        animation: shimmer 1.1s infinite linear;
      }
      @keyframes shimmer { from { background-position: 120% 0; } to { background-position: -80% 0; } }

      /* ===== 访客设备信息采集（浏览器侧）=====
         与 .diag-card 的区别：这里是"关于你自己的数据"，所以给它一条左侧强调边，
         并把"未采集 + 原因"做成一眼可见的两种字号，避免和真实值混淆。 */
      .tg-card {
        background: var(--panel);
        border: 1px solid var(--line);
        border-left: 3px solid var(--accent);
        border-radius: var(--radius);
        padding: 20px 22px;
      }
      .tg-lead { font-size: 14px; line-height: 1.7; color: var(--text); margin: 0 0 14px; }
      .tg-lead strong { color: var(--accent); }

      .tg-scopes { list-style: none; margin: 0 0 14px; padding: 0;
        display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
      .tg-scope { display: flex; gap: 10px; align-items: flex-start;
        padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
        background: var(--soft-bg); cursor: pointer; }
      .tg-scope:hover { border-color: var(--line-strong); }
      .tg-scope input { margin: 2px 0 0; flex-shrink: 0; accent-color: var(--accent); }
      .tg-scope-t { display: flex; flex-direction: column; gap: 2px; }
      .tg-scope-t b { font-size: 13.5px; color: var(--text); }
      .tg-scope-t em { font-style: normal; font-size: 12px; color: var(--muted); line-height: 1.5; }

      .tg-notes { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 6px; }
      .tg-notes li { position: relative; padding-left: 14px; font-size: 12.5px;
        color: var(--muted); line-height: 1.65; }
      .tg-notes li::before { content: "·"; position: absolute; left: 3px; color: var(--accent); }

      .tg-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 4px 0 0; }
      .tg-danger { color: var(--danger); border-color: rgba(207,34,46,0.35); }
      .tg-danger:hover { border-color: var(--danger); }

      .tg-detail { margin-top: 16px; font-size: 13px; }
      .tg-detail summary { cursor: pointer; color: var(--muted); }
      .tg-detail summary:hover { color: var(--text); }
      .tg-detail table { margin-top: 10px; }
      .tg-fine { font-size: 12px; color: var(--muted); line-height: 1.7; margin: 10px 0 0; }
      .tg-raw { max-height: 320px; overflow: auto; padding: 12px 14px; margin: 10px 0 0;
        background: var(--soft-bg); border: 1px solid var(--line); border-radius: 10px;
        font: 12px/1.6 "JetBrains Mono", Consolas, monospace; color: var(--text);
        white-space: pre-wrap; word-break: break-all; }

      .tg-grants { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
      .tg-tag { font-size: 11.5px; padding: 3px 10px; border-radius: 999px;
        border: 1px solid var(--line-strong); color: var(--muted); background: var(--soft-bg); }
      .tg-tag.on { color: var(--ok); border-color: rgba(26,127,55,0.35); }

      .tg-flags { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 6px; }
      .tg-flags li { font-size: 12.5px; line-height: 1.65; color: var(--warn);
        padding: 8px 12px; border-radius: 8px;
        background: rgba(154,103,0,0.08); border: 1px dashed var(--warn); }
      .tg-notice { font-size: 12.5px; line-height: 1.65; color: var(--muted); margin: 0 0 12px; }
      .tg-err { font-size: 13px; color: var(--danger); margin: 0 0 12px; }
      .tg-status { font-size: 12.5px; color: var(--text); margin: 0 0 14px; }
      .tg-muted { color: var(--muted); margin-left: 6px; }

      .tg-val { font-variant-numeric: tabular-nums; }
      .tg-miss { font-size: 12px; color: var(--muted); }
      .tg-reason { display: block; font-size: 12px; color: var(--muted);
        line-height: 1.6; margin-top: 2px; }
      .tg-path { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }

      .grad { color: var(--accent); }

      .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
      .reveal.in { opacity: 1; transform: none; }

      footer {
        margin-top: 56px; padding: 22px 0 8px;
        border-top: 1px solid var(--line);
        color: var(--muted); font-size: 13px;
        text-align: center;
      }

      /* ===== modals ===== */
      .modal-mask {
        position: fixed; inset: 0; z-index: 100;
        background: rgba(3, 5, 10, 0.68);
        backdrop-filter: blur(7px);
        -webkit-backdrop-filter: blur(7px);
        display: none; align-items: center; justify-content: center;
      }
      .modal-mask.show { display: flex; }
      .modal {
        position: relative;
        width: min(400px, calc(100% - 40px));
        max-height: calc(100vh - 40px);
        overflow-y: auto;
        background: var(--panel-strong);
        border: 1px solid var(--line-strong);
        border-radius: 12px;
        padding: 32px 28px;
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
        animation: pop 0.2s ease;
      }
      @keyframes pop {
        from { opacity: 0; transform: translateY(8px); }
        to { opacity: 1; transform: none; }
      }
      .modal .m-logo {
        width: 44px; height: 44px; border-radius: 10px;
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.18);
        display: grid; place-items: center;
        margin-bottom: 16px;
      }
      .modal h3 { margin: 0 0 4px; font-size: 1.25rem; }
      .modal .m-sub { color: var(--muted); font-size: 13.5px; margin: 0 0 18px; }
      .modal .m-close {
        position: absolute; top: 12px; right: 18px;
        color: var(--muted); font-size: 24px; cursor: pointer; line-height: 1;
        /* O-10：由 <span> 改成 <button> 以支持键盘操作，这里清掉浏览器默认按钮样式 */
        background: none; border: 0; padding: 0; font-family: inherit;
      }
      .modal .m-close:hover { color: var(--text); }

      /* login modal: choice cards / step back */
      .choice-card {
        display: flex; gap: 12px; align-items: center;
        width: 100%; text-align: left;
        padding: 12px 13px; margin: 0 0 10px;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid var(--line);
        border-radius: 8px; cursor: pointer; color: var(--text);
        font-family: inherit;
        transition: border-color 0.15s, background 0.15s;
      }
      .choice-card:hover { border-color: var(--accent); background: rgba(45, 212, 191, 0.06); }
      .choice-ico {
        width: 32px; height: 32px; flex: none; border-radius: 7px;
        display: grid; place-items: center;
        color: var(--accent); background: var(--accent-soft);
      }
      .choice-text { display: flex; flex-direction: column; gap: 2px; }
      .choice-text b { font-size: 13.5px; font-weight: 600; }
      .choice-text small { color: var(--muted); font-size: 12px; }
      .step-back {
        background: none; border: none; color: var(--muted);
        cursor: pointer; font-size: 12.5px;
        padding: 0 0 12px; font-family: inherit;
      }
      .step-back:hover { color: var(--text); }

      /* ===== responsive ===== */
      section, .panel { scroll-margin-top: 76px; }

      /* ===== 移动端抽屉导航（O-02）=====
         桌面基线：汉堡按钮与遮罩都不出现。
         注意：这两条基线声明必须写在下面的 @media 之前，
         否则同为 .class 优先级、且源码在后的基线会覆盖媒体查询里的规则。 */
      .viewbar-left { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1 1 auto; }
      .viewbar-left > div { min-width: 0; }
      .viewbar-right { display: flex; align-items: center; gap: 12px; flex: none; }
      .nav-toggle { display: none; }   /* 桌面隐藏，仅移动端出现 */
      .nav-scrim { display: none; }

      /* O-02：≤900px 侧栏改为全屏抽屉。
         此前（≤720px）把 15 个入口压成一条 206px 宽的横向滚动条，
         实测 13/15 项在屏幕外，且顶栏被吃成两行。 */
      @media (max-width: 900px) {
        .app { display: block; }
        .nav-toggle {
          display: grid; place-items: center;
          width: 40px; height: 40px; flex: none;
          border: 1px solid var(--line); border-radius: 9px;
          background: var(--surface); color: var(--text);
          cursor: pointer; padding: 0;
        }
        .nav-toggle:hover { border-color: var(--accent); color: var(--accent); }
        .sidebar {
          position: fixed; top: 0; bottom: 0; left: 0;
          width: 286px; max-width: 86vw;
          z-index: 60;
          padding: 18px 14px 18px;
          border-right: 1px solid var(--line);
          overflow-y: auto;
          transform: translateX(-100%);
          transition: transform 0.22s ease;
        }
        body.nav-open .sidebar {
          transform: translateX(0);
          box-shadow: 0 0 44px rgba(0, 0, 0, 0.45);
        }
        .nav-scrim {
          display: block;
          position: fixed; inset: 0; z-index: 55;
          background: rgba(0, 0, 0, 0.5);
          opacity: 0; pointer-events: none;
          transition: opacity 0.2s ease;
        }
        body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
        body.nav-open { overflow: hidden; }
        /* 抽屉内保持纵向分组列表，复用桌面侧栏样式 */
        .main { margin-left: 0; }
        /* 顶栏压成一行（此前 flex-wrap: wrap + 全尺寸账户按钮在 390px 下
           折成两行，实测视口高度被吃掉 107px）。改为不换行 + 压缩尺寸，
           标题先被省略号截断，账户入口与主题按钮始终完整可见。 */
        .viewbar { padding: 8px 16px; min-height: 56px; gap: 8px; flex-wrap: nowrap; }
        .viewbar-right { gap: 8px; }
        .view-title { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .breadcrumb { display: none; }   /* 移动端省一行，面包屑信息由抽屉内高亮承载 */
        .acc-btn, .user-btn { font-size: 12px; padding: 4px 10px 4px 4px; gap: 6px; }
        .acc-avatar, .user-avatar { width: 22px; height: 22px; }
        .content { padding: 20px 16px 48px; }
        .hero { padding: 14px 0 4px; }
        .stats { grid-template-columns: repeat(2, 1fr); }
        .live-panel { grid-template-columns: 1fr; }
      }

      /* ===== DC-Lab archive + optics additions ===== */
      .dc-details { cursor: pointer; }
      .dc-details > summary {
        list-style: none; display: flex; gap: 10px;
        align-items: center; flex-wrap: wrap;
      }
      .dc-details > summary::-webkit-details-marker { display: none; }
      .dc-tag {
        font-size: 11px; font-weight: 700; color: var(--accent);
        border: 1px solid rgba(46,230,200,.4); border-radius: 6px;
        padding: 1px 8px;
      }
      .dc-phase-grid {
        display: grid; gap: 12px; margin-top: 14px;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      }
      .dc-mini {
        border: 1px solid var(--line); border-radius: 10px;
        padding: 10px 12px; background: var(--soft-bg);
      }
      .dc-mini h4 {
        margin: 0 0 6px; font-size: 12px; color: var(--muted);
        text-transform: uppercase; letter-spacing: .06em;
      }
      .dc-mini .item { padding: 5px 0; font-size: 13px; border-top: 1px dashed var(--line); }
      .dc-mini .item:first-of-type { border-top: 0; }

      .opt-dot {
        width: 10px; height: 10px; border-radius: 50%; flex: none;
      }
      .opt-up { background: var(--accent); }
      .opt-down { background: var(--danger); }
      .opt-unknown { background: var(--muted); }

      .diag-line {
        display: flex; justify-content: space-between; gap: 12px;
        padding: 6px 0; font-size: 13px;
        border-bottom: 1px dashed var(--line);
      }
      .diag-line:last-child { border-bottom: 0; }
      .diag-line span:first-child { color: var(--muted); }

      .trouble-box {
        border-radius: 10px; padding: 10px 12px; font-size: 13px;
        border: 1px solid var(--line); background: var(--soft-bg);
      }
      .trouble-ok { border-color: rgba(46,230,200,.4); background: rgba(46,230,200,.07); }
      .trouble-warn { border-color: rgba(245,185,95,.45); background: rgba(245,185,95,.08); }
      .trouble-bad { border-color: rgba(255,107,129,.45); background: rgba(255,107,129,.08); }

      .log-line { font-size: 13px; padding: 3px 0; display: flex; gap: 10px; }
      .log-time { color: var(--muted); font-family: "JetBrains Mono", Consolas, monospace; flex: none; }

      #toast-box {
        position: fixed; top: 74px; right: 18px; z-index: 120;
        display: flex; flex-direction: column; gap: 9px; max-width: 340px;
      }
      .toast {
        padding: 11px 15px; border-radius: 11px; font-size: 13px;
        background: var(--panel-strong); border: 1px solid var(--line-strong);
        box-shadow: var(--shadow);
        animation: toastIn .25s ease;
      }
      .toast.ok { border-color: rgba(46,230,200,.5); }
      .toast.warn { border-color: rgba(245,185,95,.55); }
      .toast.bad { border-color: rgba(255,107,129,.55); }
      @keyframes toastIn {
        from { opacity: 0; transform: translateX(16px); }
        to { opacity: 1; transform: none; }
      }
      .toast.fade { opacity: 0; transition: opacity .5s; }

      /* ===== documentation (prose) system ===== */
      .doc-body { color: var(--text); font-size: 14.5px; }
      .doc-body h2 {
        font-size: 1.22rem; margin: 32px 0 12px; padding-top: 20px;
        border-top: 1px solid var(--line); letter-spacing: -0.01em;
      }
      .doc-body h2:first-child { border-top: none; margin-top: 2px; padding-top: 0; }
      .doc-body h3 { font-size: 1rem; margin: 22px 0 8px; }
      .doc-body p { margin: 0 0 12px; color: var(--muted); }
      .doc-body ul, .doc-body ol { margin: 0 0 12px; padding-left: 22px; color: var(--muted); }
      .doc-body li { margin: 4px 0; }
      .doc-body a { color: var(--accent-2); text-decoration: none; }
      .doc-body a:hover { text-decoration: underline; }
      .doc-body pre { margin: 0 0 14px; }
      .doc-body hr { border: none; border-top: 1px solid var(--line); margin: 22px 0; }
      .doc-body strong { color: var(--text); }
      .doc-callout {
        border: 1px solid var(--line); border-left: 3px solid var(--accent);
        background: var(--soft-bg);
        border-radius: 0 8px 8px 0; padding: 12px 14px; margin: 0 0 14px;
        font-size: 13.5px; color: var(--muted);
      }
      .doc-callout.warn { border-left-color: var(--warm); }
      .doc-callout.info { border-left-color: var(--accent-2); }
      .doc-steps { list-style: none; padding-left: 0; margin: 0 0 14px; counter-reset: step; }
      .doc-steps > li {
        counter-increment: step; position: relative;
        padding: 0 0 14px 38px; color: var(--muted); font-size: 14px;
      }
      .doc-steps > li::before {
        content: counter(step); position: absolute; left: 0; top: 1px;
        width: 24px; height: 24px; border-radius: 50%;
        background: var(--accent-soft); color: var(--accent);
        font-size: 12.5px; font-weight: 700;
        display: grid; place-items: center;
        border: 1px solid rgba(45, 212, 191, 0.35);
      }
      .doc-steps b, .doc-steps strong { color: var(--text); }
      .modal.modal-wide { width: min(820px, calc(100% - 40px)); }
      #doc-viewer { max-height: 70vh; overflow-y: auto; }

      /* ===== learning journey ===== */
      .journey { margin: 6px 0 26px; }
      .j-node { display: flex; gap: 14px; position: relative; padding-bottom: 14px; }
      .j-node::before {
        content: ''; position: absolute; left: 11px; top: 28px; bottom: 0;
        width: 2px; background: var(--line);
      }
      .j-node:last-child { padding-bottom: 0; }
      .j-node:last-child::before { display: none; }
      .j-dot {
        width: 24px; height: 24px; border-radius: 50%; flex: none;
        background: var(--panel); border: 2px solid var(--accent);
        display: grid; place-items: center;
        font-size: 10.5px; font-weight: 700; color: var(--accent); z-index: 1;
      }
      .j-body {
        flex: 1; cursor: pointer; border: 1px solid var(--line);
        border-radius: var(--radius-sm); padding: 10px 13px;
        background: var(--panel);
      }
      .j-body:hover { border-color: var(--line-strong); background: var(--panel-strong); }
      .j-body h4 { margin: 0 0 3px; font-size: 14px; }
      .j-body p { margin: 0; color: var(--muted); font-size: 13px; }
      .j-body .j-verdict { float: right; color: var(--accent); font-size: 12px; }

      /* ===== 键盘焦点可见（O-03）=====
         此前全站没有可见焦点环：键盘用户按 Tab 看不出当前位置。
         用 :focus-visible 而不是 :focus，鼠标点击不会出现多余的框。 */
      :focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
        border-radius: 6px;
      }

      /* ===== 「复制当前视图链接」按钮（N-11）=====
         窄屏只留图标，避免把顶栏挤到折行（此前修过一次折行缺陷）。 */
      .link-copy-btn {
        display: inline-flex; align-items: center; gap: 6px;
        height: 34px; padding: 0 10px; flex: none;
        background: var(--surface); color: var(--text);
        border: 1px solid var(--line); border-radius: 8px;
        font-family: inherit; font-size: 12.5px; cursor: pointer;
        transition: color .15s, border-color .15s;
      }
      .link-copy-btn:hover { color: var(--accent); border-color: var(--accent); }
      .link-copy-label { display: none; }
      @media (min-width: 901px) { .link-copy-label { display: inline; } }