.host-overview {
        width: 100%;
        padding: 70px 0 60px;
        background: #070a13 url('/frontend/img/mech-bg.jpg') center/cover no-repeat;
        position: relative;
        overflow: hidden;
      }
      .host-overview::before {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 50% 0%, rgba(59,130,246,.18) 0%, transparent 55%),
                    linear-gradient(180deg, rgba(7,10,19,.94) 0%, rgba(7,10,19,.86) 100%);
        pointer-events: none;
      }
      .host-overview .container { position: relative; z-index: 1; }
      .ho-card {
        background: rgba(10,15,28,.9);
        border: 1px solid rgba(99,102,241,.18);
        border-radius: 24px;
        padding: 26px 32px 24px;
        box-shadow: 0 28px 90px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.05);
        backdrop-filter: blur(18px);
      }
      .ho-head {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 18px;
        flex-wrap: wrap;
        margin-bottom: 4px;
      }
      .ho-title-wrap { display: flex; flex-direction: column; gap: 2px; }
      .ho-title {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        letter-spacing: .3px;
      }
      .ho-title svg { width: 24px; height: 24px; color: #60a5fa; }
      .ho-subtitle { font-size: 12px; color: #64748b; font-weight: 500; }
      .ho-health {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        font-weight: 600;
        color: #e2e8f0;
        padding: 6px 14px;
        border-radius: 20px;
        background: rgba(16,185,129,.12);
        border: 1px solid rgba(16,185,129,.25);
      }
      .ho-health span {
        font-size: 18px; font-weight: 800;
        background: linear-gradient(90deg, #34d399, #60a5fa);
        -webkit-background-clip: text; background-clip: text; color: transparent;
      }
      .ho-meta {
        color: #64748b;
        font-size: 12.5px;
        margin-bottom: 30px;
      }
      .ho-gauges {
        display: flex;
        justify-content: center;
        align-items: flex-end;
        gap: 22px;
        flex-wrap: nowrap;
        margin-bottom: 34px;
      }
      @media (min-width: 1101px) {
        .ho-gauges .ho-gauge:nth-child(2) .gauge-center-value b,
        .ho-gauges .ho-gauge:nth-child(4) .gauge-center-value b { font-size: 32px; }
        .ho-gauges .ho-gauge:nth-child(2) .gauge-center-value .prefix,
        .ho-gauges .ho-gauge:nth-child(2) .gauge-center-value .unit,
        .ho-gauges .ho-gauge:nth-child(4) .gauge-center-value .prefix,
        .ho-gauges .ho-gauge:nth-child(4) .gauge-center-value .unit { font-size: 12px; }
      }
      @media (max-width: 1366px) and (min-width: 1101px) {
        .ho-gauges { gap: 18px; }
        .host-overview .ho-gauge { width: 140px !important; --g-size: 140px !important; --g-lift: 0px !important; }
        .host-overview .ho-gauge:nth-child(2),
        .host-overview .ho-gauge:nth-child(4) { width: 178px !important; --g-size: 178px !important; --g-lift: 40px !important; }
        .host-overview .ho-gauge:nth-child(3) { width: 248px !important; --g-size: 248px !important; --g-lift: 48px !important; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value b { font-size: 42px !important; }
      }
      .ho-gauge {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: var(--g-size, 156px);
        margin-bottom: var(--g-lift, 0px);
      }
      .gauge-face {
        position: relative;
        border-radius: 50%;
        width: var(--g-size, 150px);
        height: var(--g-size, 150px);
        background:
          radial-gradient(ellipse at 35% 28%, rgba(255,255,255,0.10) 0%, transparent 45%),
          radial-gradient(ellipse at 65% 78%, rgba(30,41,59,0.5) 0%, transparent 50%),
          linear-gradient(175deg, #1e293b 0%, #152038 40%, #0f172a 100%);
        box-shadow:
          inset 0 1px 0 rgba(255,255,255,0.08),
          inset 0 -3px 10px rgba(0,0,0,0.6),
          0 2px 16px rgba(0,0,0,0.5);
      }
      .gauge-chrome-ring,
      .gauge-glow-ring,
      .gauge-glare {
        position: absolute;
        inset: 0;
        border-radius: 50%;
        pointer-events: none;
      }
      .gauge-chrome-ring {
        padding: 3px;
        background: conic-gradient(from 145deg,
          #94a3b8 0deg, #f1f5f9 36deg, #cbd5e1 72deg, #64748b 108deg,
          #94a3b8 144deg, #475569 180deg, #cbd5e1 216deg, #e2e8f0 252deg,
          #94a3b8 288deg, #64748b 324deg, #94a3b8 360deg);
        -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
        -webkit-mask-composite: xor;
        mask-composite: exclude;
      }
      .gauge-glow-ring {
        inset: -3px;
        padding: 5px;
        -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
        -webkit-mask-composite: xor;
        mask-composite: exclude;
      }
      .gauge-glare {
        inset: 6px;
        background: linear-gradient(165deg, rgba(255,255,255,0.04) 0%, transparent 35%, transparent 65%, rgba(255,255,255,0.02) 100%);
        mix-blend-mode: overlay;
        opacity: 0.8;
        filter: blur(0.5px);
        -webkit-mask-image: radial-gradient(circle at 50% 52%, #000 0%, transparent 75%);
        mask-image: radial-gradient(circle at 50% 52%, #000 0%, transparent 75%);
      }
      .g-svg {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        overflow: visible;
      }
      .gauge-center-value {
        position: absolute;
        left: 0;
        right: 0;
        top: 56%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 2px;
        pointer-events: none;
      }
      .gauge-center-value .prefix,
      .gauge-center-value .unit {
        font-weight: 500;
        font-size: 11px;
      }
      .gauge-center-value b {
        font-weight: 800;
        font-size: 26px;
        line-height: 1;
      }
      .ho-gauge.large .gauge-center-value b { font-size: 56px; }
      .ho-gauge.large .gauge-center-value .prefix,
      .ho-gauge.large .gauge-center-value .unit { font-size: 17px; }
      @media (min-width: 901px) {
        .ho-gauge[style*="--g-size: 340"] .gauge-center-value b { font-size: 56px; }
        .ho-gauge[style*="--g-size: 340"] .gauge-center-value .prefix,
        .ho-gauge[style*="--g-size: 340"] .gauge-center-value .unit { font-size: 17px; }
      }
      .g-label {
        color: var(--g-color);
        font-size: 14px;
        font-weight: 700;
        margin-top: 10px;
      }
      .g-status {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        font-size: 11px;
        font-weight: 600;
        color: var(--g-color);
        padding: 2px 8px;
        border-radius: 12px;
        background: rgba(255,255,255,0.05);
        margin-top: 4px;
      }
      .g-status::before {
        content: '';
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--g-color);
        box-shadow: 0 0 6px var(--g-color);
      }
      .g-sub { font-size: 11px; color: #475569; margin-top: 4px; }
      .ho-stats {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 14px;
      }
      .ho-stat {
        background: rgba(15,23,42,.55);
        border: 1px solid rgba(99,102,241,.12);
        border-radius: 14px;
        padding: 16px 14px;
        display: flex;
        align-items: center;
        gap: 12px;
        transition: transform .2s, border-color .2s, background .2s;
      }
      .ho-stat:hover { transform: translateY(-3px); border-color: rgba(99,102,241,.3); background: rgba(15,23,42,.7); }
      .ho-stat svg { width: 22px; height: 22px; color: #60a5fa; flex-shrink: 0; }
      .ho-stat .hs-label { font-size: 11.5px; color: #64748b; }
      .ho-stat .hs-val { font-size: 17px; font-weight: 700; color: #fff; margin-top: 2px; }
      /* ===== 平板横屏 / 小屏笔记本：紧凑阶梯（881-1100px） ===== */
      @media (max-width: 1100px) and (min-width: 881px) {
        .ho-gauges { gap: 10px; }
        .host-overview .ho-gauge { width: 112px !important; --g-size: 112px !important; --g-lift: 0px !important; }
        .host-overview .ho-gauge:nth-child(2),
        .host-overview .ho-gauge:nth-child(4) { width: 144px !important; --g-size: 144px !important; --g-lift: 22px !important; }
        .host-overview .ho-gauge:nth-child(3) { width: 186px !important; --g-size: 186px !important; --g-lift: 34px !important; }
        .host-overview .gauge-center-value b { font-size: 19px; }
        .host-overview .gauge-center-value .prefix,
        .host-overview .gauge-center-value .unit { font-size: 10px; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value b { font-size: 32px; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .prefix,
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .unit { font-size: 12px; }
        .host-overview .g-label { font-size: 13px; }
        .ho-stats { grid-template-columns: repeat(3, 1fr); }
      }
      /* ===== 平板竖屏（769-880px，含 834 iPad Air） ===== */
      @media (max-width: 880px) and (min-width: 769px) {
        .ho-gauges { gap: 6px; }
        .host-overview .ho-gauge { width: 100px !important; --g-size: 100px !important; --g-lift: 0px !important; }
        .host-overview .ho-gauge:nth-child(2),
        .host-overview .ho-gauge:nth-child(4) { width: 130px !important; --g-size: 130px !important; --g-lift: 18px !important; }
        .host-overview .ho-gauge:nth-child(3) { width: 168px !important; --g-size: 168px !important; --g-lift: 28px !important; }
        .host-overview .gauge-center-value b { font-size: 17px; }
        .host-overview .gauge-center-value .prefix,
        .host-overview .gauge-center-value .unit { font-size: 9px; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value b { font-size: 28px; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .prefix,
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .unit { font-size: 11px; }
        .host-overview .g-label { font-size: 12px; }
        .g-status, .g-sub { font-size: 10px; }
        .ho-stats { grid-template-columns: repeat(3, 1fr); }
      }
      /* ===== 手机（≤768px）：流畅度大表居中置顶，其余四张两列流式排列 ===== */
      @media (max-width: 768px) {
        .ho-card { padding: 22px 16px 18px; }
        .ho-meta { font-size: 11.5px; line-height: 1.6; word-break: break-all; margin-bottom: 22px; }
        .ho-gauges { gap: 20px 8px; flex-wrap: wrap; margin-bottom: 26px; align-items: flex-start; }
        .host-overview .ho-gauge,
        .host-overview .ho-gauge:nth-child(1),
        .host-overview .ho-gauge:nth-child(2),
        .host-overview .ho-gauge:nth-child(4),
        .host-overview .ho-gauge:nth-child(5) {
          flex: 0 0 calc(50% - 4px);
          width: auto !important;
          --g-size: min(36vw, 130px) !important;
          --g-lift: 0px !important;
          order: 0;
        }
        .host-overview .ho-gauge:nth-child(3) {
          flex: 0 0 100%;
          width: auto !important;
          --g-size: min(54vw, 196px) !important;
          --g-lift: 0px !important;
          order: -1;
        }
        .host-overview .gauge-center-value b { font-size: clamp(18px, 5.6vw, 23px) !important; }
        .host-overview .gauge-center-value .prefix,
        .host-overview .gauge-center-value .unit { font-size: 10px !important; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value b { font-size: clamp(30px, 9vw, 38px) !important; }
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .prefix,
        .host-overview .ho-gauge:nth-child(3) .gauge-center-value .unit { font-size: 13px !important; }
        .host-overview .g-label { font-size: 13px; }
        .g-status { font-size: 10.5px; }
        .g-sub { font-size: 10.5px; }
        .ho-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
        .ho-stat { padding: 12px 10px; gap: 9px; }
      }