:root{
  --teal:#00bfb3; --teal-d:#009e95; --tint:#e6faf8;
  --ink:#1a1a1a; --body:#555; --muted:#777; --line:#e6e9ea;
  --bg:#fff; --alt:#f6f9f9;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2{font-weight:400;line-height:1.08;letter-spacing:-.03em}
h3{font-weight:700;line-height:1.25;letter-spacing:-.01em}
.wp-wrap{width:min(1180px,92%);margin-inline:auto}

/* header */
.wp-hd{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.wp-hd .wp-wrap{display:flex;align-items:center;gap:2.2rem;height:74px}
.wp-brand img{width:133px;height:auto}
.wp-nav{display:flex;gap:1.7rem;margin-left:auto;font-size:.9rem;font-weight:600;color:#3d4747}
.wp-nav a:hover{color:var(--teal-d)}
.wp-hd .wp-cta{background:var(--teal);color:#fff;padding:.55rem 1.15rem;border-radius:999px;
  font-size:.86rem;font-weight:700;white-space:nowrap}
.wp-hd .wp-cta:hover{background:var(--teal-d)}

/* hero */
.wp-hero{display:grid;grid-template-columns:1fr 1.05fr;gap:3.4rem;align-items:center;
  padding:5.2rem 0 4.6rem}
.wp-eyebrow{font-size:.76rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase;
  color:var(--teal-d);display:flex;align-items:center;gap:.6rem;margin-bottom:1.5rem}
.wp-dot{width:9px;height:9px;border-radius:50%;background:var(--teal);display:inline-block}
.wp-hero h1{font-size:clamp(2.9rem,5.3vw,4.6rem)}
.wp-lede{margin-top:1.5rem;max-width:33rem;font-size:1.06rem;color:var(--body)}
.wp-hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:2.1rem}
.wp-btn{display:inline-block;padding:.78rem 1.6rem;border-radius:999px;background:var(--teal);
  color:#fff;font-weight:700;font-size:.92rem;border:2px solid var(--teal)}
.wp-btn:hover{background:var(--teal-d);border-color:var(--teal-d)}
.wp-btn.ghost{background:transparent;color:var(--teal-d);border-color:#bfe6e3}
.wp-btn.ghost:hover{background:var(--tint)}
.wp-hero-meta{margin-top:2.4rem;font-size:.8rem;letter-spacing:.06em;color:var(--muted);font-weight:600}
.wp-hero-meta span{margin:0 .55rem;color:#c4cdcd}
.wp-hero-media{position:relative}
.wp-hero-media img{width:100%;height:clamp(360px,42vw,520px);object-fit:cover;border-radius:4px}
.wp-hero-cap{position:absolute;left:0;bottom:0;background:rgba(26,26,26,.78);color:#fff;
  font-size:.76rem;letter-spacing:.03em;padding:.62rem 1.05rem;border-radius:0 4px 0 0}
.wp-rule{height:3px;background:var(--teal)}

/* jump nav */
.wp-jump{display:flex;flex-wrap:wrap;gap:.55rem;padding:1.6rem 0}
.wp-jump a{font-size:.82rem;font-weight:700;padding:.5rem .95rem;border:1px solid var(--line);
  border-radius:999px;background:#fff;color:#44504f}
.wp-jump a:hover{border-color:var(--teal);background:var(--tint);color:var(--teal-d)}
.wp-jump b{color:var(--teal-d);margin-right:.4rem}

/* group */
.wp-group{padding:3.6rem 0 1rem}
.wp-group.alt{background:var(--alt)}
.wp-group-head{display:grid;grid-template-columns:120px 1fr;gap:1.4rem;align-items:end;
  padding-bottom:1.5rem;border-bottom:1px solid var(--line);margin-bottom:2.8rem}
.wp-group-num{font-size:.78rem;font-weight:800;letter-spacing:.16em;color:var(--teal-d);padding-bottom:.5rem}
.wp-group-head h2{font-size:clamp(2rem,3.8vw,2.9rem)}
.wp-group-head p{grid-column:2;margin-top:.55rem;color:var(--body);font-size:.98rem;max-width:48rem}

/* category */
.wp-cat{padding:1.2rem 0 4.2rem}
.wp-cat + .wp-cat{border-top:1px solid var(--line);padding-top:3.2rem}
.wp-cat-top{display:grid;grid-template-columns:78px 1fr auto;gap:1.4rem;align-items:start}
.wp-cat-id{font-size:2.1rem;font-weight:400;color:var(--teal);letter-spacing:-.04em;line-height:1}
.wp-cat-id span{font-size:.8rem;color:#b3bfbe;letter-spacing:0}
.wp-cat-group{font-size:.7rem;font-weight:800;letter-spacing:.18em;color:var(--teal-d);margin-bottom:.35rem}
.wp-cat-top h3{font-size:clamp(1.55rem,2.6vw,2.15rem);font-weight:400;letter-spacing:-.025em}
.wp-cat-cn{font-size:.86rem;color:var(--muted);margin-top:.25rem}
.wp-cat-specs{font-size:.78rem;color:var(--muted);border:1px solid var(--line);
  border-radius:999px;padding:.45rem 1rem;white-space:nowrap;background:#fff}
.wp-cat-intro{max-width:52rem;margin:1.35rem 0 1.9rem;color:var(--body);font-size:1rem}

/* gallery — 4 cols, lead spans 2x2, all cells cover-cropped */
.wp-gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:190px;gap:10px}
.wp-gallery figure{position:relative;overflow:hidden;border-radius:3px;background:#e9eeee}
.wp-gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.wp-gallery figure:hover img{transform:scale(1.04)}
.wp-g-lead{grid-column:span 2;grid-row:span 2}
.wp-gallery figcaption{position:absolute;left:0;bottom:0;font-size:.66rem;letter-spacing:.05em;
  color:#fff;background:rgba(26,26,26,.6);padding:.3rem .6rem;opacity:0;transition:opacity .25s}
.wp-gallery figure:hover figcaption{opacity:1}

/* variants */
.wp-variants{display:flex;align-items:baseline;gap:1.2rem;flex-wrap:wrap;margin-top:1.7rem;
  padding-top:1.25rem;border-top:1px solid var(--line)}
.wp-vlabel{font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.wp-chips{display:flex;flex-wrap:wrap;gap:.42rem}
.wp-chip{font-size:.78rem;font-weight:600;color:#41504f;background:#f0f4f4;
  border:1px solid #e2e8e8;border-radius:999px;padding:.34rem .78rem}
.wp-chip:first-child{background:var(--teal);border-color:var(--teal);color:#fff;font-weight:800}
.wp-inline-dl{display:inline-flex;align-items:center;gap:.5rem;margin-top:1.3rem;
  font-size:.88rem;font-weight:700;color:var(--teal-d);border-bottom:2px solid var(--teal);padding-bottom:.15rem}
.wp-inline-dl:hover{color:var(--ink)}

/* downloads */
.wp-downloads{padding:4.4rem 0 5rem;background:var(--tint)}
.wp-dl-head{margin-bottom:2.2rem}
.wp-dl-head h2{font-size:clamp(1.9rem,3.4vw,2.6rem)}
.wp-dl-head p{color:var(--body);margin-top:.6rem}
.wp-dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.wp-dl{background:#fff;border:1px solid #dcece9;border-radius:12px;padding:1.6rem 1.5rem;
  display:flex;flex-direction:column;gap:.5rem;transition:.2s}
.wp-dl:hover{box-shadow:0 12px 28px rgba(0,140,132,.13);transform:translateY(-3px);border-color:var(--teal)}
.wp-dl-tag{font-size:.68rem;font-weight:800;letter-spacing:.14em;color:var(--teal-d)}
.wp-dl h3{font-size:1.08rem}
.wp-dl p{font-size:.84rem;color:var(--body);flex:1}
.wp-dl-meta{font-size:.76rem;color:var(--muted);font-weight:600}
.wp-dl-go{font-size:.84rem;font-weight:800;color:var(--teal-d);padding-top:.7rem;border-top:1px solid var(--line)}

/* footer */
.wp-ft{background:#141a1a;color:#d8e2e1;padding:2.6rem 0;font-size:.84rem}
.wp-ft .wp-wrap{display:flex;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;align-items:center}
.wp-ft img{width:133px;filter:brightness(0) invert(1);opacity:.92}
.wp-ft a{color:var(--teal)}
.wp-ft .wp-note{color:#8d9c9b;font-size:.76rem}

@media(max-width:1000px){
  .wp-hero{grid-template-columns:1fr;gap:2.4rem;padding:3.4rem 0 3rem}
  .wp-hero-media img{height:360px}
  .wp-cat-top{grid-template-columns:64px 1fr}
  .wp-cat-specs{grid-column:2;justify-self:start;white-space:normal}
  .wp-dl-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:700px){
  .wp-hd .wp-wrap{height:64px;gap:1rem}
  .wp-nav{display:none}
  .wp-hd .wp-cta{margin-left:auto}
  .wp-group-head{grid-template-columns:1fr;gap:.4rem}
  .wp-group-head p{grid-column:1}
  .wp-gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:150px}
  .wp-g-lead{grid-column:span 2;grid-row:span 1}
  .wp-dl-grid{grid-template-columns:1fr}
  .wp-cat-intro{font-size:.95rem}
}