@import url('https://fonts.googleapis.com/css2?family=Raleway:ital,wght@0,300;0,400;0,600;0,800;1,400&family=Source+Serif+4:ital,wght@0,400;0,600;0,700;1,400&display=swap');
:root{
  --bg:#040d18;--deep:#061222;--panel:#0a1e35;--card:#0d2540;--border:#1a3a5c;
  --sky:#0ea5e9;--azure:#3b82f6;--mist:#7dd3fc;--cloud:#e0f2fe;--white:#f0f9ff;
  --teal:#0d9488;--rose:#e11d48;--amber:#d97706;--green:#15803d;
  --text:#bae6fd;--muted:#3b6080;--air:#e0f2fe;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Raleway',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;overflow-x:hidden}
.hero{position:relative;overflow:hidden;min-height:520px;display:flex;align-items:center;background:linear-gradient(145deg,#040d18 0%,#061628 45%,#081e35 80%,#0a2440 100%)}
.hero-glow{position:absolute;inset:0;background:radial-gradient(ellipse 55% 65% at 78% 50%,rgba(14,165,233,.18) 0%,transparent 65%),radial-gradient(ellipse 28% 40% at 5% 75%,rgba(59,130,246,.1) 0%,transparent 55%)}
#breath-canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.25}
.hero-inner{position:relative;z-index:2;max-width:1080px;margin:auto;padding:80px 55px;display:grid;grid-template-columns:1fr 280px;gap:50px;align-items:center}
.hero-label{font-size:.7rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--mist);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.hero-label::before{content:'';width:20px;height:1px;background:var(--sky)}
h1{font-family:'Source Serif 4',Georgia,serif;font-size:clamp(3rem,6vw,5rem);color:var(--white);line-height:.95;letter-spacing:-.02em;margin-bottom:20px}
h1 em{display:block;font-size:.42em;font-style:italic;color:var(--mist);margin-bottom:8px;font-weight:400}
.hero-desc{color:rgba(186,230,253,.7);font-size:1.02rem;font-weight:300;line-height:1.75;max-width:460px;margin-bottom:28px}
.hero-stats{display:flex;gap:24px;flex-wrap:wrap}
.hs{border-left:2px solid rgba(14,165,233,.45);padding-left:14px}
.hs-val{font-family:'Source Serif 4',serif;font-size:1.9rem;color:var(--mist);line-height:1}
.hs-lbl{font-size:.73rem;color:rgba(186,230,253,.6);margin-top:2px}
.page-nav{background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 4px 20px rgba(0,0,0,.5)}
.nav-wrap{max-width:1080px;margin:auto;padding:0 55px;display:flex;overflow-x:auto;scrollbar-width:none}
.nav-wrap::-webkit-scrollbar{display:none}
.nl{padding:13px 17px;font-size:.8rem;font-weight:600;color:var(--muted);text-decoration:none;white-space:nowrap;border-bottom:2px solid transparent;transition:all .2s}
.nl:hover,.nl.active{color:var(--sky);border-bottom-color:var(--sky)}
.page-wrap{max-width:1080px;margin:auto;padding:64px 55px;display:grid;grid-template-columns:1fr 285px;gap:60px;align-items:start}
main{min-width:0}
.sec{margin-bottom:70px}
.sec-tag{font-size:.7rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--sky);margin-bottom:12px;display:flex;align-items:center;gap:10px}
.sec-tag::after{content:'';flex:1;height:1px;background:var(--border)}
.sec h2{font-family:'Source Serif 4',serif;font-size:2rem;color:var(--white);margin-bottom:16px;line-height:1.15}
.sec p{font-size:.97rem;margin-bottom:14px;line-height:1.82}
.anat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}
.anat-card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px;border-top:3px solid var(--sky);transition:transform .2s,box-shadow .2s}
.anat-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(14,165,233,.14)}
.anat-card:nth-child(3n+2){border-top-color:var(--azure)}
.anat-card:nth-child(3n){border-top-color:var(--teal)}
.ac-tag{display:inline-block;font-size:.66rem;font-weight:700;letter-spacing:.06em;padding:2px 7px;border-radius:2px;margin-bottom:7px;background:rgba(14,165,233,.12);color:var(--sky)}
.ac-name{font-family:'Source Serif 4',serif;font-size:1rem;color:var(--white);margin-bottom:5px}
.ac-desc{font-size:.82rem;color:rgba(186,230,253,.72);line-height:1.6}
.breath-wrap{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin:20px 0}
.bw-title{font-size:.85rem;font-weight:700;color:var(--sky);margin-bottom:12px}
#breath-demo{width:100%;height:120px;display:block;border-radius:8px}
.bw-ctrl{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;align-items:center}
.bw-btn{padding:6px 14px;border:1px solid var(--border);border-radius:5px;background:transparent;color:var(--text);font-size:.79rem;font-weight:600;cursor:pointer;transition:all .2s;font-family:'Raleway',sans-serif}
.bw-btn:hover,.bw-btn.on{background:var(--sky);color:var(--bg);border-color:var(--sky)}
.bw-info{font-size:.75rem;color:var(--muted)}
.tbl{width:100%;border-collapse:collapse;font-size:.86rem;margin:18px 0}
.tbl th{background:var(--panel);color:var(--sky);border:1px solid var(--border);padding:9px 15px;text-align:left;font-weight:700;font-size:.81rem;letter-spacing:.04em}
.tbl td{padding:9px 15px;border:1px solid var(--border);vertical-align:top;line-height:1.55}
.tbl tr:nth-child(odd) td{background:rgba(255,255,255,.02)}
.tbl tr:hover td{background:rgba(14,165,233,.06)}
.badge{display:inline-block;padding:2px 7px;border-radius:3px;font-size:.69rem;font-weight:700}
.b-s{background:rgba(14,165,233,.15);color:var(--sky)}
.b-t{background:rgba(13,148,136,.14);color:#2dd4bf}
.b-r{background:rgba(225,29,72,.13);color:#fb7185}
.b-a{background:rgba(217,119,6,.13);color:#fbbf24}
.b-g{background:rgba(21,128,61,.13);color:#4ade80}
.ib{border-radius:8px;padding:17px 21px;margin:20px 0}
.ib-s{background:rgba(14,165,233,.07);border:1px solid rgba(14,165,233,.2);border-left:4px solid var(--sky)}
.ib-t{background:rgba(13,148,136,.07);border:1px solid rgba(13,148,136,.2);border-left:4px solid var(--teal)}
.ib-r{background:rgba(225,29,72,.06);border:1px solid rgba(225,29,72,.18);border-left:4px solid var(--rose)}
.ib-title{font-family:'Source Serif 4',serif;font-size:1rem;color:var(--white);margin-bottom:5px}
.ib p{font-size:.87rem;color:rgba(186,230,253,.82);margin:0;line-height:1.72}
.spo2-calc{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:22px;margin:20px 0}
.spo2-title{font-family:'Source Serif 4',serif;font-size:1.1rem;color:var(--white);margin-bottom:14px}
.spo2-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:8px;font-size:.84rem}
.spo2-row label{color:var(--muted)}
.spo2-row input{background:var(--panel);border:1px solid var(--border);color:var(--white);padding:7px 12px;border-radius:4px;font-size:.9rem;width:90px}
#spo2-result{color:var(--sky);font-weight:600;min-height:1.5em;font-size:.88rem;margin-top:6px}
.patho{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px;margin-bottom:11px;display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start;transition:border-color .2s}
.patho:hover{border-color:rgba(14,165,233,.4)}
.patho-ico{width:40px;height:40px;border-radius:8px;background:rgba(14,165,233,.1);display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}
.patho-body strong{display:block;font-family:'Source Serif 4',serif;font-size:1rem;color:var(--white);margin-bottom:4px}
.patho-body p{font-size:.84rem;color:rgba(186,230,253,.7);line-height:1.65;margin:0}
.ptag{display:inline-block;font-size:.67rem;font-weight:700;padding:2px 7px;border-radius:3px;margin-bottom:5px}
.pt-obs{background:rgba(14,165,233,.15);color:var(--sky)}
.pt-inf{background:rgba(13,148,136,.14);color:#2dd4bf}
.pt-neo{background:rgba(225,29,72,.14);color:#fb7185}
.pt-vas{background:rgba(217,119,6,.13);color:#fbbf24}
.pt-oc{background:rgba(21,128,61,.13);color:#4ade80}
.sidebar{position:sticky;top:62px}
.widget{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:14px}
.w-title{font-family:'Source Serif 4',serif;font-size:1.1rem;color:var(--white);margin-bottom:13px;padding-bottom:10px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.w-title::before{content:'';width:10px;height:10px;border-radius:50%;background:var(--sky);flex-shrink:0}
.sr{display:flex;justify-content:space-between;align-items:baseline;padding:7px 0;border-bottom:1px solid var(--border);font-size:.83rem}
.sr:last-child{border-bottom:none}
.sr .sl{color:var(--muted)}
.sr .sv{font-weight:700;color:var(--sky);font-family:'Source Serif 4',serif;font-size:.95rem}
.vol-bar{margin:8px 0}
.vb-label{font-size:.74rem;color:var(--muted);display:flex;justify-content:space-between;margin-bottom:3px}
.vb-track{height:7px;background:var(--border);border-radius:4px;overflow:hidden}
.vb-fill{height:100%;border-radius:4px;transition:width 1.4s ease}
footer{background:var(--bg);border-top:1px solid var(--border);text-align:center;padding:26px;font-size:.77rem;color:var(--muted)}
footer strong{color:rgba(240,249,255,.7)}
@media(max-width:820px){.hero-inner,.page-wrap{grid-template-columns:1fr}.sidebar{position:static}.anat-grid{grid-template-columns:1fr 1fr}.nav-wrap,.page-wrap{padding-left:20px;padding-right:20px}}
@media(max-width:500px){.anat-grid{grid-template-columns:1fr}.hero-inner{padding:50px 22px}}