:root{
  --ink:#0f172a;
  --muted:#5b6475;
  --accent:#1f5aa6;
  --accent2:#004e92;
  --accent3:#000428;
  --card:#ffffff;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}

/* 顶部横幅 */
.pg-hero{ position:relative; min-height:240px; display:grid; place-items:center; margin:0 0 26px; overflow:hidden; }
.pg-hero__bg{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(0,0,0,.28), rgba(0,0,0,.28)), var(--hero, url('images/production-line-1.jpg')) center/cover no-repeat;
  transform: scale(1.03);
  filter: saturate(1.05) contrast(1.02);
}
.pg-hero__inner{ position:relative; text-align:center; color:#fff; }
.pg-hero__inner h1{ margin:0 0 6px; font:800 34px/1.1 system-ui, -apple-system, "Segoe UI", Arial, sans-serif; letter-spacing:.02em; }
.pg-hero__inner p{ margin:0; opacity:.92; }

/* 主体布局 */
.pg{ max-width:1200px; margin:0 auto 70px; padding:0 16px; display:grid; grid-template-columns: 260px 1fr; gap:24px; }

/* 左侧类目 */
.pg-side{ position:sticky; top:76px; align-self:start; }
.side-tabs{ list-style:none; margin:0; padding:0; display:grid; gap:8px; }
.side-tab{
  width:100%; text-align:left; border:1px solid #e6e8eb; background:#fff; color:#1f2937;
  border-radius:12px; padding:12px 14px; cursor:pointer; font-weight:700;
  transition: border-color .15s ease, box-shadow .15s ease, transform .12s ease;
}
.side-tab:hover{ border-color:#cfd9e6; box-shadow:0 8px 20px rgba(0,0,0,.06); }
.side-tab.is-active{ border-color:#b9d0f3; box-shadow:0 0 0 4px rgba(31,90,166,.14); }

/* 右侧网格 */
.pg-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap:22px; }
@media (max-width: 992px){ .pg{ grid-template-columns:1fr; } .pg-grid{ grid-template-columns: repeat(2,1fr); } .pg-side{ position:static; } }
@media (max-width: 560px){ .pg-grid{ grid-template-columns: 1fr; } }

/* 卡片 */
.pg-card{
  background:var(--card); border:1px solid #e6e8eb; border-radius:16px; overflow:hidden;
  box-shadow: var(--shadow);
  transform: translateY(0); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  opacity:0; transform: translateY(12px);
}
.pg-card.in{ opacity:1; transform: translateY(0); }
.pg-card:hover{ transform: translateY(-3px); box-shadow: 0 14px 36px rgba(0,0,0,.10); border-color:#dfe6f0; }

.pg-thumb{ aspect-ratio: 4/3; background:#f6f7fb; overflow:hidden; }
.pg-thumb img{ width:100%; height:100%; object-fit:cover; display:block; }

/* 骨架 */
.skeleton{ position:relative; overflow:hidden; }
.skeleton::after{
  content:""; position:absolute; inset:0;
  background: linear-gradient(90deg, rgba(240,242,247,0) 0%, rgba(240,242,247,.9) 50%, rgba(240,242,247,0) 100%);
  transform: translateX(-100%); animation: sk 1.3s infinite;
}
@keyframes sk { to{ transform: translateX(100%);} }

.pg-body{ padding:14px 16px 16px; }
.pg-eyebrow{ font-weight:800; color:#64748b; font-size:13px; letter-spacing:.04em; }
.pg-title{ margin:4px 0 6px; font:800 18px/1.25 system-ui, -apple-system,"Segoe UI",Arial,sans-serif; color:var(--ink); }
.pg-desc{ margin:0 0 12px; color:#586174; font-size:14px; line-height:1.65; }

.pg-cta{ display:flex; gap:10px; }
.btn{ display:inline-flex; align-items:center; justify-content:center; height:38px; padding:0 14px; border-radius:999px; font-weight:800; text-decoration:none; cursor:pointer; border:0; }
.btn--solid{ color:#fff; background: linear-gradient(90deg, var(--accent2), var(--accent3)); box-shadow: 0 10px 20px rgba(0,0,0,.12); }
.btn--solid:hover{ filter:brightness(1.05); }
.btn--ghost{ color:var(--accent); background:#eff5ff; }
.btn--ghost:hover{ background:#e5efff; }

/* 筛选隐藏 */
.pg-card.is-hide{ display:none !important; }

/* 弹窗 */
.pg-modal{ position:fixed; inset:0; background:rgba(15,23,42,.5); backdrop-filter:saturate(140%) blur(6px); display:none; align-items:center; justify-content:center; z-index:4000; }
.pg-modal.show{ display:flex; }
.pg-modal__dialog{ position:relative; width:min(960px,92vw); max-height:86vh; background:#fff; border-radius:16px; overflow:hidden;
  box-shadow:0 40px 100px rgba(0,0,0,.35); display:grid; grid-template-columns:1fr 1fr;}
.pg-modal__media{ background:#f6f7fb; }
.pg-modal__media img{ width:100%; height:100%; object-fit:cover; display:block; }
.pg-modal__body{ padding:18px 20px 20px; overflow:auto; }
.pg-modal__title{ margin:0 0 8px; font:800 20px/1.3 system-ui, -apple-system, "Segoe UI", Arial, sans-serif; color:#0f172a; }
.pg-modal__spec{ color:#475569; line-height:1.7; }
.pg-modal__spec ul{ margin:6px 0 0; padding-left:18px; }
.pg-modal__close{ position:absolute; top:12px; right:12px; width:36px; height:36px; border-radius:50%; border:0;
  background:rgba(255,255,255,.92); box-shadow:0 6px 16px rgba(0,0,0,.18); cursor:pointer; font-size:20px; }

@media (max-width: 840px){
  .pg-modal__dialog{ grid-template-columns:1fr; max-height:92vh; }
  .pg-modal__media{ aspect-ratio:4/3; }
}
body.modal-open{ overflow:hidden; }