/* ============================================================
   Stainless Steel Pipe Connector — product page
   Scope: .ppc   (product landing layout, not the article template)
   ============================================================ */

.ppc{
  --blue:#0052cc;
  --blue-700:#0046b0;
  --navy:#0f2747;
  --accent:#00a3c4;
  --ink:#1f2733;
  --muted:#545f6e;
  --line:#e2e9f2;
  --soft:#f5f8fc;
  --soft2:#eef3f9;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(15,39,71,.05),0 8px 24px rgba(15,39,71,.06);
  --shadow-md:0 2px 4px rgba(15,39,71,.06),0 16px 40px rgba(15,39,71,.10);
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background:#fff;
  scroll-behavior:smooth;
}
@media (max-width:640px){ .ppc{padding:0 16px;font-size:16.5px;} }

.ppc *{ box-sizing:border-box; }
.ppc h2,.ppc h3,.ppc h4{ color:var(--navy); line-height:1.24; font-weight:800; letter-spacing:-.015em; margin:0; }
.ppc p{ margin:0 0 14px; }
.ppc p:last-child{ margin-bottom:0; }
.ppc a{ color:var(--blue); text-decoration:none; }
.ppc a:hover{ text-decoration:underline; }
.ppc strong{ font-weight:700; color:var(--navy); }
.ppc code{ font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size:.88em; background:var(--soft2); border:1px solid #dde7f2; border-radius:4px; padding:1px 5px; color:#12385f; }

/* ---------- Breadcrumb ---------- */
.ppc-crumbs{ padding:18px 0 0; font-size:14px; color:var(--muted); }
.ppc-crumbs a{ color:var(--muted); }
.ppc-crumbs span{ margin:0 7px; color:#9db0c4; }

/* ---------- Hero ---------- */
.ppc-hero{ display:grid; grid-template-columns:1.02fr .98fr; gap:48px; align-items:center; padding:26px 0 40px; }
.ppc-shot{ position:relative; }
.ppc-intro{ min-width:0; }
.ppc-shot img{ display:block; width:100%; height:auto; border-radius:16px; border:1px solid var(--line); box-shadow:var(--shadow-md); }
.ppc-shot-badge{
  position:absolute; left:14px; top:14px; z-index:2;
  background:rgba(15,39,71,.88); color:#fff; font-size:12.5px; font-weight:700;
  letter-spacing:.06em; text-transform:uppercase; padding:6px 12px; border-radius:999px;
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
}
.ppc-eyebrow{ font-size:13px; font-weight:800; letter-spacing:.11em; text-transform:uppercase; color:var(--accent); margin:0 0 10px; }
.ppc-title{ font-size:35px; line-height:1.14; letter-spacing:-.025em; }
.ppc-sub{ font-size:18px; color:var(--muted); line-height:1.6; margin:14px 0 20px; }

.ppc-chips{ display:flex; flex-wrap:wrap; gap:9px; margin:0 0 24px; padding:0; list-style:none; }
.ppc-chip{
  display:inline-flex; align-items:center; gap:7px;
  border:1px solid var(--line); background:var(--soft); border-radius:999px;
  padding:7px 14px; font-size:14.5px; color:var(--navy); font-weight:600;
}
.ppc-chip i{ width:6px; height:6px; border-radius:50%; background:var(--accent); display:block; }

.ppc-actions{ display:flex; flex-wrap:wrap; align-items:center; gap:16px; margin-bottom:22px; }
.ppc-ghost{ font-size:15.5px; font-weight:700; color:var(--blue); }

.ppc-facts{ list-style:none; margin:0; padding:18px 0 0; border-top:1px solid var(--line); display:grid; gap:9px; }
.ppc-facts li{ display:flex; gap:10px; font-size:15px; color:var(--muted); line-height:1.55; }
.ppc-facts li:before{ content:""; flex:none; width:5px; height:5px; margin-top:9px; border-radius:50%; background:var(--blue); }

/* ---------- Standard site CTA button ---------- */
.ppc .gcq-btn{
  display:inline-block; cursor:pointer; background:var(--blue); color:#fff;
  font-size:16px; font-weight:800; padding:14px 30px; border-radius:10px;
  box-shadow:0 8px 22px rgba(0,82,204,.30); border:0; text-decoration:none;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.ppc .gcq-btn:hover{ background:var(--blue-700); transform:translateY(-2px); box-shadow:0 12px 30px rgba(0,82,204,.42); color:#fff; text-decoration:none; }
.ppc .gcq-btn:active{ transform:translateY(0); box-shadow:0 6px 16px rgba(0,82,204,.28); }
.ppc-cta .gcq-btn{ font-size:17px; padding:15px 34px; }

/* ---------- Key-fact strip ---------- */
.ppc-strip{
  display:grid; grid-template-columns:repeat(4,1fr); gap:0;
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
}
.ppc-strip div{ padding:20px 22px; border-left:1px solid var(--line); }
.ppc-strip div:first-child{ border-left:0; padding-left:0; }
.ppc-strip b{ display:block; font-size:12px; font-weight:800; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); margin-bottom:5px; }
.ppc-strip span{ display:block; font-size:15.5px; font-weight:700; color:var(--navy); line-height:1.4; }

/* ---------- Sticky section nav ---------- */
.ppc-nav{
  position:sticky; top:0; z-index:30; background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line); margin-top:26px;
}
.ppc-nav ul{ display:flex; gap:4px; margin:0; padding:9px 0; list-style:none; overflow-x:auto; scrollbar-width:none; }
.ppc-nav ul::-webkit-scrollbar{ display:none; }
.ppc-nav a{ display:block; white-space:nowrap; padding:8px 14px; border-radius:8px; font-size:14.5px; font-weight:700; color:var(--muted); }
.ppc-nav a:hover{ background:var(--soft2); color:var(--navy); text-decoration:none; }

/* ---------- Sections ---------- */
.ppc-sec{ padding:48px 0; border-top:1px solid var(--line); }
.ppc-sec:first-of-type{ border-top:0; }
.ppc-h3{ font-size:27px; margin:0 0 8px; letter-spacing:-.02em; }
.ppc-h3:before{ content:""; display:block; width:38px; height:3px; border-radius:2px; background:var(--blue); margin-bottom:14px; }
.ppc-lead{ font-size:17px; color:var(--muted); max-width:74ch; margin:0 0 26px; }
.ppc-h4{ font-size:17px; margin:0 0 6px; }

/* ---------- Two-column text ---------- */
.ppc-2col{ display:grid; grid-template-columns:1fr 1fr; gap:32px; }
.ppc-2col p{ font-size:16.5px; }

/* ---------- Spec sheet ---------- */
.ppc-spec{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.ppc-spec-row{ display:grid; grid-template-columns:250px 1fr; gap:24px; padding:13px 20px; border-top:1px solid var(--line); }
.ppc-spec-row:first-child{ border-top:0; }
.ppc-spec-row:nth-child(odd){ background:var(--soft); }
.ppc-spec-row dt,.ppc-spec-row .k{ font-weight:700; color:var(--navy); font-size:15px; }
.ppc-spec-row dd,.ppc-spec-row .v{ margin:0; font-size:15.5px; color:var(--ink); }
.ppc-tag{ display:inline-block; font-size:12.5px; font-weight:800; letter-spacing:.04em; padding:2px 8px; border-radius:5px; margin-left:8px; vertical-align:1px; }
.ppc-tag.fixed{ background:#e6f0ff; color:#0046b0; }
.ppc-tag.draw{ background:#fff3d6; color:#8a5a00; }

/* ---------- Tables ---------- */
.ppc-tbl{ width:100%; border-collapse:collapse; font-size:15.5px; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.ppc-tbl caption{ caption-side:top; text-align:left; font-size:13.5px; font-weight:700; color:var(--muted); padding:0 0 8px; }
.ppc-tbl th{ background:var(--soft2); color:var(--navy); font-weight:800; text-align:left; padding:12px 14px; font-size:14px; letter-spacing:.01em; border-bottom:1px solid var(--line); }
.ppc-tbl td{ padding:12px 14px; border-top:1px solid var(--line); vertical-align:top; line-height:1.6; }
.ppc-tbl tbody tr:nth-child(even){ background:#fbfdff; }
.ppc-tbl-scroll{ overflow-x:auto; }

/* ---------- Cards ---------- */
.ppc-cards{ display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
.ppc-card{ border:1px solid var(--line); border-radius:var(--radius); padding:20px 20px 18px; background:#fff; }
.ppc-card h4{ font-size:16.5px; margin:0 0 4px; display:flex; align-items:center; gap:9px; }
.ppc-card .num{ flex:none; width:22px; height:22px; border-radius:6px; background:var(--blue); color:#fff; font-size:12.5px; font-weight:800; display:inline-flex; align-items:center; justify-content:center; }
.ppc-card p{ font-size:15px; color:var(--muted); margin:0 0 10px; }
.ppc-card .crit{ font-size:14px; color:var(--navy); background:var(--soft); border-radius:8px; padding:9px 11px; margin:0; }

/* ---------- Figure / SVG ---------- */
.ppc-fig{ margin:0 0 24px; }
.ppc-svgwrap{ border:1px solid var(--line); border-radius:var(--radius); background:var(--soft); padding:16px 10px; }
.ppc-svgwrap svg{ display:block; width:100%; height:auto; }
.ppc-fig img{ display:block; width:100%; height:auto; border-radius:var(--radius); border:1px solid var(--line); box-shadow:var(--shadow-sm); }
.ppc-fig figcaption{ font-size:14px; color:var(--muted); margin-top:10px; line-height:1.6; }

/* ---------- Notes ---------- */
.ppc-note{ border-left:3px solid var(--blue); background:var(--soft); border-radius:0 10px 10px 0; padding:14px 18px; font-size:15.5px; color:var(--ink); margin:20px 0 0; }
.ppc-note b{ color:var(--navy); }

/* ---------- Process steps ---------- */
.ppc-steps{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; counter-reset:step; }
.ppc-step{ position:relative; border:1px solid var(--line); border-radius:var(--radius); padding:18px 18px 16px 56px; background:#fff; }
.ppc-step:before{
  counter-increment:step; content:counter(step,decimal-leading-zero);
  position:absolute; left:16px; top:16px;
  font-size:13px; font-weight:800; color:var(--blue); letter-spacing:.02em;
}
.ppc-step h4{ font-size:15.5px; margin:0 0 3px; }
.ppc-step p{ font-size:14.5px; color:var(--muted); margin:0; line-height:1.55; }

/* ---------- Applications ---------- */
.ppc-apps{ display:flex; flex-wrap:wrap; gap:10px; margin:0; padding:0; list-style:none; }
.ppc-apps li{ border:1px solid var(--line); background:var(--soft); border-radius:999px; padding:8px 15px; font-size:15px; color:var(--navy); font-weight:600; }

/* ---------- FAQ ---------- */
.ppc-faq{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.ppc-faq details{ border-top:1px solid var(--line); }
.ppc-faq details:first-child{ border-top:0; }
.ppc-faq summary{
  cursor:pointer; list-style:none; padding:16px 44px 16px 20px; position:relative;
  font-weight:700; color:var(--navy); font-size:16px;
}
.ppc-faq summary::-webkit-details-marker{ display:none; }
.ppc-faq summary:after{
  content:"+"; position:absolute; right:20px; top:14px; font-size:20px; font-weight:400; color:var(--blue); line-height:1;
}
.ppc-faq details[open] summary:after{ content:"\2212"; }
.ppc-faq summary:hover{ background:var(--soft); }
.ppc-a{ padding:0 20px 16px; }
.ppc-a p{ font-size:15.5px; color:var(--muted); margin:0; }

/* ---------- CTA panel ---------- */
.ppc-cta{
  margin:8px 0 0; padding:42px 40px; border-radius:16px; text-align:center;
  background:linear-gradient(135deg,#0f2747 0%,#123a66 55%,#15507f 100%);
  box-shadow:var(--shadow-md);
}
.ppc-cta h3{ color:#fff; font-size:26px; margin:0 0 10px; }
.ppc-cta p{ color:#c9d8e8; font-size:16.5px; max-width:62ch; margin:0 auto 22px; }
.ppc-cta .micro{ color:#9fb4cb; font-size:14px; margin:16px auto 0; }

/* ---------- Related ---------- */
.ppc-rel{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.ppc-rel a{ display:block; border:1px solid var(--line); border-radius:var(--radius); padding:17px 18px; background:#fff; transition:border-color .15s ease, box-shadow .15s ease, transform .15s ease; }
.ppc-rel a:hover{ text-decoration:none; border-color:#c6d9ee; box-shadow:var(--shadow-sm); transform:translateY(-2px); }
.ppc-rel .k{ display:block; font-size:12px; font-weight:800; letter-spacing:.09em; text-transform:uppercase; color:var(--accent); margin-bottom:5px; }
.ppc-rel .t{ display:block; font-size:16px; font-weight:800; color:var(--navy); line-height:1.35; }
.ppc-rel p{ font-size:14px; color:var(--muted); margin:5px 0 0; }

/* ---------- Footnote ---------- */
.ppc-foot{ padding:26px 0 44px; border-top:1px solid var(--line); margin-top:34px; }
.ppc-foot p{ font-size:14px; color:var(--muted); max-width:88ch; }

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .ppc-hero{ grid-template-columns:1fr; gap:26px; padding-top:18px; }
  .ppc-title{ font-size:30px; }
  .ppc-strip{ grid-template-columns:repeat(2,1fr); }
  .ppc-strip div{ border-left:0; padding-left:0; padding-right:18px; }
  .ppc-strip div:nth-child(n+3){ border-top:1px solid var(--line); }
  .ppc-2col{ grid-template-columns:1fr; gap:0; }
  .ppc-steps{ grid-template-columns:repeat(2,1fr); }
  .ppc-rel{ grid-template-columns:1fr; }
}
@media (max-width:720px){
  .ppc-title{ font-size:26px; }
  .ppc-h3{ font-size:22px; }
  .ppc-sec{ padding:36px 0; }
  .ppc-cards{ grid-template-columns:1fr; }
  .ppc-steps{ grid-template-columns:1fr; }
  .ppc-spec-row{ grid-template-columns:1fr; gap:2px; padding:12px 16px; }
  .ppc-cta{ padding:30px 22px; }
  .ppc-tbl{ font-size:14.5px; }
  .ppc-tbl th,.ppc-tbl td{ padding:10px 11px; }
}