:root{--ink:#173e4d;--muted:#66808a;--line:#c9dbde;--paper:#fff;--page:#eef6f6;--teal:#2f829c;--blue:#315fc7;--orange:#e98a20;--red:#d9574c;--purple:#7750c9;--shadow:0 16px 42px rgba(31,71,82,.11)}
*{box-sizing:border-box}
body{margin:0;min-width:960px;color:var(--ink);background:linear-gradient(rgba(47,130,156,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(47,130,156,.04) 1px,transparent 1px),var(--page);background-size:32px 32px;font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",system-ui,sans-serif}
button{font:inherit}.hub-shell{width:min(1740px,calc(100% - 40px));margin:0 auto;padding:28px 0 52px}.hub-header{display:flex;align-items:center;justify-content:space-between;gap:30px;margin-bottom:18px;padding:22px 26px;border:1px solid rgba(152,184,190,.72);border-radius:22px;background:rgba(255,255,255,.94);box-shadow:var(--shadow)}
.eyebrow{display:block;margin-bottom:5px;color:var(--orange);font-size:14px;font-weight:900;letter-spacing:.12em}.hub-header h1{margin:0;font-size:clamp(31px,3vw,48px);line-height:1.08;letter-spacing:-.035em}.hub-header p{margin:7px 0 0;color:var(--muted);font-size:16px}.header-tools{display:flex;align-items:center;gap:12px}.count-chip{padding:9px 14px;border-radius:999px;background:#eaf3f4;color:var(--muted);font-size:14px;white-space:nowrap}.count-chip b{margin-right:4px;color:var(--teal);font-size:18px}.zoom-control{display:grid;grid-template-columns:34px 58px 34px;align-items:center;padding:3px;border:1px solid #bfd0d3;border-radius:999px;background:#fff}.zoom-control button{height:31px;border:0;border-radius:999px;background:transparent;color:#315868;font-weight:900;cursor:pointer}.zoom-control button:hover{background:#e5eff0}.zoom-control button:disabled{opacity:.35;cursor:default}
.lab-group{margin-top:16px;padding:18px 20px 20px;border:1px solid rgba(152,184,190,.72);border-radius:22px;background:rgba(255,255,255,.95);box-shadow:var(--shadow)}.group-heading{display:flex;align-items:center;gap:12px;margin-bottom:14px}.group-number{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:#fff0dd;color:var(--orange);font-size:14px;font-weight:950}.group-heading h2{margin:0;font-size:23px}.group-heading p{margin:3px 0 0;color:var(--muted);font-size:14px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.four-cards{grid-template-columns:repeat(4,minmax(0,1fr))}.two-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.lab-card{position:relative;min-height:210px;padding:20px 21px;border:1px solid #d4e2e4;border-radius:17px;background:#fbfdfd;color:var(--ink);text-decoration:none;box-shadow:inset 0 4px 0 var(--accent),0 7px 18px rgba(31,71,82,.055);transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.lab-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 45%,#d4e2e4);box-shadow:inset 0 4px 0 var(--accent),0 13px 26px rgba(31,71,82,.12)}.lab-card:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 42%,transparent);outline-offset:3px}.lab-card.teal{--accent:var(--teal)}.lab-card.blue{--accent:var(--blue)}.lab-card.orange{--accent:var(--orange)}.lab-card.red{--accent:var(--red)}.lab-card.purple{--accent:var(--purple)}
.card-code{display:inline-block;padding:5px 9px;border-radius:999px;background:color-mix(in srgb,var(--accent) 10%,white);color:var(--accent);font-size:12px;font-weight:900}.card-symbol{position:absolute;top:16px;right:19px;color:color-mix(in srgb,var(--accent) 72%,var(--ink));font:900 27px/1 Georgia,"Times New Roman",serif}.lab-card h3{margin:17px 0 8px;font-size:21px}.lab-card p{margin:0 0 22px;color:var(--muted);font-size:14px;line-height:1.58}.lab-card>strong{position:absolute;left:21px;bottom:17px;color:var(--accent);font-size:14px}.lab-card>strong span{display:inline-block;margin-left:5px;transition:transform .16s ease}.lab-card:hover>strong span{transform:translateX(4px)}
@media(max-width:1250px){.four-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(prefers-reduced-motion:reduce){.lab-card,.lab-card>strong span{transition:none}}