:root{
  --navy:#102a43;
  --navy-2:#173b63;
  --blue:#2f6fed;
  --blue-soft:#eaf1ff;
  --ink:#17324d;
  --muted:#64748b;
  --line:#dbe5ef;
  --bg:#f6f9fc;
  --white:#ffffff;
  --shadow:0 14px 40px rgba(16,42,67,.09);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--white)}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,229,239,.8)}
.nav-wrap{height:74px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--navy);color:white;display:grid;place-items:center;font-size:13px;letter-spacing:.04em}
.brand-text{font-size:21px;color:var(--navy)}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14px;font-weight:600;color:#475569}
.nav a:hover{color:var(--blue)}
.nav-cta{margin-left:8px}
.menu-btn{display:none;background:none;border:0;font-size:24px;color:var(--navy)}
.mobile-nav{display:flex;flex-direction:column;padding:14px 24px 22px;gap:14px;border-top:1px solid var(--line)}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:13px 18px;font-weight:700;font-size:14px;transition:.2s}
.btn-primary{background:var(--blue);color:white;box-shadow:0 8px 22px rgba(47,111,237,.24)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-outline{border:1px solid var(--line);color:var(--navy);background:#fff}
.btn-ghost{color:var(--navy);background:#eef4fb}
.hero{padding:82px 0 72px;background:linear-gradient(180deg,#fbfdff 0%,#f5f9fd 100%)}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:64px;align-items:center}
.eyebrow{display:inline-block;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.12em;margin-bottom:14px}
h1,h2,h3{margin-top:0}
h1,h2{font-family:"Source Serif 4",Georgia,serif;color:var(--navy)}
h1{font-size:clamp(44px,6vw,72px);line-height:1.02;letter-spacing:-.035em;margin-bottom:22px}
h2{font-size:clamp(32px,4vw,48px);line-height:1.08;letter-spacing:-.025em;margin-bottom:14px}
.hero-sub{font-size:19px;line-height:1.7;color:#52667a;max-width:690px}
.hero-actions{display:flex;gap:12px;margin:30px 0 32px;flex-wrap:wrap}
.stats-row{display:flex;gap:36px;flex-wrap:wrap;padding-top:20px;border-top:1px solid var(--line)}
.stats-row div{display:flex;flex-direction:column;gap:3px}.stats-row strong{font-size:24px;color:var(--navy)}.stats-row span{font-size:13px;color:var(--muted)}
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.panel-top{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;padding-bottom:18px;border-bottom:1px solid var(--line)}
.panel-top h3{margin:4px 0 0;font-size:20px;color:var(--navy)}
.mini-label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:800}
.pill{font-size:12px;background:var(--blue-soft);color:var(--blue);padding:8px 10px;border-radius:999px;font-weight:800}
.journey-list{padding-top:10px}.journey-item{display:flex;gap:14px;align-items:center;padding:10px 4px}.journey-item>span{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--navy);background:#fff}.journey-item.active>span{background:var(--blue);color:#fff;border-color:var(--blue)}.journey-item p{margin:0;display:flex;flex-direction:column;gap:3px}.journey-item b{font-size:14px}.journey-item small{color:var(--muted);font-size:12px}
.section{padding:88px 0}.soft{background:var(--bg)}
.section-head{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:end;margin-bottom:34px}.section-head p{color:var(--muted);line-height:1.7;margin:0;max-width:520px;justify-self:end}
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.system-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;display:flex;align-items:center;gap:14px;box-shadow:0 8px 24px rgba(16,42,67,.04);transition:.18s;cursor:pointer}.system-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.system-card .icon{width:48px;height:48px;border-radius:14px;background:var(--blue-soft);display:grid;place-items:center;font-size:24px}.system-card h3{margin:0 0 5px;color:var(--navy);font-size:16px}.system-card p{margin:0;color:var(--muted);font-size:13px}.system-card>span{margin-left:auto;color:var(--blue);font-size:20px}
.progress-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.progress-card,.continue-card{border:1px solid var(--line);border-radius:var(--radius);padding:30px}.progress-card{background:#fff}.progress-card p,.continue-card p{color:var(--muted);line-height:1.65}.progress-box{margin-top:28px}.progress-copy{display:flex;justify-content:space-between;font-size:14px;margin-bottom:10px}.progress-copy strong{color:var(--navy)}.progress-copy span{color:var(--muted)}.progress-bar{height:10px;border-radius:999px;background:#edf2f7;overflow:hidden}.progress-bar span{display:block;height:100%;background:var(--blue);border-radius:999px}.continue-card{background:linear-gradient(145deg,var(--navy),var(--navy-2));color:white}.continue-card h3{font-size:24px;margin-top:12px}.continue-card p{color:#d9e4ef}.continue-card a{display:inline-block;margin-top:16px;font-weight:700;color:#fff}
.dark{background:var(--navy);color:white}.light-head h2{color:white}.light-head p{color:#c8d5e3}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.method-grid>div{border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:24px;background:rgba(255,255,255,.04)}.method-grid span{font-size:12px;font-weight:800;letter-spacing:.12em;color:#7fa8ff}.method-grid h3{margin:18px 0 8px;font-size:19px}.method-grid p{margin:0;color:#c8d5e3;line-height:1.65;font-size:14px}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px}.about-grid p{font-size:16px;color:var(--muted);line-height:1.8;margin-top:0}
.footer{border-top:1px solid var(--line);padding:30px 0;background:#fbfdff}.footer-wrap{display:flex;align-items:center;gap:24px;flex-wrap:wrap}.footer-wrap p{margin:0;color:var(--muted);font-size:13px}.footer-wrap>span{margin-left:auto;color:var(--muted);font-size:12px}.footer-brand .brand-text{font-size:17px}.footer-brand .brand-mark{width:32px;height:32px}
@media (max-width:900px){.nav,.nav-cta{display:none}.menu-btn{display:block;margin-left:auto}.hero{padding-top:56px}.hero-grid,.section-head,.progress-wrap,.about-grid{grid-template-columns:1fr}.section-head p{justify-self:start}.cards-grid{grid-template-columns:repeat(2,1fr)}.method-grid{grid-template-columns:1fr}.hero-grid{gap:36px}}
@media (max-width:620px){.container{width:min(100% - 24px,1180px)}.hero{padding:42px 0 52px}.section{padding:64px 0}.cards-grid{grid-template-columns:1fr}.stats-row{gap:22px}.hero-panel{padding:18px}.system-card{padding:17px}.footer-wrap{align-items:flex-start;flex-direction:column}.footer-wrap>span{margin-left:0}}
/* V2 */
.mobile-nav[hidden]{display:none!important}
.featured{border-color:#bcd1ff;background:linear-gradient(145deg,#fff,#f5f8ff)}.muted-card{opacity:.72;cursor:default}.system-hero,.case-hero{padding:64px 0;background:linear-gradient(180deg,#fbfdff,#f3f7fc)}.breadcrumbs{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:34px}.breadcrumbs a:hover{color:var(--blue)}.system-title-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:60px;align-items:end}.system-title-grid h1,.case-hero h1{font-size:clamp(42px,5.5vw,66px)}.system-summary{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px}.system-summary strong{font-family:"Source Serif 4",serif;font-size:52px;color:var(--navy);line-height:1}.system-summary span{font-weight:700}.system-summary small{color:var(--muted)}.mini-progress{height:8px;background:#edf2f7;border-radius:999px;overflow:hidden;margin-top:12px}.mini-progress span{display:block;height:100%;background:var(--blue)}.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.case-card{border:1px solid var(--line);border-radius:24px;padding:28px;background:#fff;box-shadow:0 9px 26px rgba(16,42,67,.05);transition:.2s;display:block}.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bcd1ff}.case-number{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--blue);margin-bottom:16px}.case-badge{display:inline-flex;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700;padding:7px 10px;border-radius:999px;margin-bottom:18px}.case-card h2{font-size:31px;margin-bottom:12px}.case-card h2 em{font-size:.68em;font-weight:600}.case-card>p{color:var(--muted);line-height:1.7;min-height:110px}.case-topics{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.case-topics span{font-size:11px;border:1px solid var(--line);padding:7px 9px;border-radius:999px;color:#53677a}.case-footer{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted)}.case-footer strong{color:var(--blue)}.narrow{width:min(900px,calc(100% - 40px));margin:0 auto}.reading{width:min(820px,calc(100% - 40px));margin:0 auto}.case-hero h1 em{font-size:.68em}.diagnosis-pill{display:inline-flex;background:#e9f7ef;color:#157347;border:1px solid #c7ebd5;padding:9px 13px;border-radius:999px;font-size:13px;font-weight:800;margin-bottom:24px}.clinical-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow);margin-top:8px}.clinical-card h2{font-size:27px}.clinical-card p,.reading p{line-height:1.82;color:#40576e}.unit-section{padding:72px 0}.section-intro,.lead{color:var(--muted);font-size:17px;line-height:1.7}.objectives-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:28px}.objectives-grid>div{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);background:#fff;border-radius:16px;padding:18px}.objectives-grid span{width:34px;height:34px;flex:0 0 34px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:11px}.objectives-grid p{margin:3px 0 0;line-height:1.55}.reading h3{font-size:25px;color:var(--navy);margin-top:48px;margin-bottom:14px}.reading figure{margin:34px 0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:0 8px 28px rgba(16,42,67,.05)}.reading figure img{display:block;width:100%;height:auto;border-radius:12px}.reading figcaption{font-size:12px;color:var(--muted);padding:12px 6px 2px}.clinical-note{border-left:4px solid var(--blue);background:#eff5ff;border-radius:0 16px 16px 0;padding:20px 22px;margin:28px 0}.clinical-note.orange{border-left-color:#d7862f;background:#fff1e3}.clinical-note span{font-size:11px;font-weight:800;letter-spacing:.11em;color:var(--navy)}.clinical-note p{margin:8px 0 0}.case-stepbar{position:sticky;top:74px;z-index:15;background:#fff;border-bottom:1px solid var(--line)}.case-stepbar .container{display:flex;gap:6px;overflow-x:auto;padding-top:10px;padding-bottom:10px}.case-stepbar a{white-space:nowrap;font-size:12px;font-weight:700;color:#52667a;padding:8px 10px;border-radius:9px}.case-stepbar a:hover{background:var(--blue-soft);color:var(--blue)}.quiz-list{display:flex;flex-direction:column;gap:16px;margin:28px 0}.quiz-question{border:1px solid var(--line);border-radius:18px;background:#fff;padding:22px;margin:0}.quiz-question legend{font-weight:700;color:var(--navy);line-height:1.5;padding:0 8px}.quiz-question legend span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--blue-soft);color:var(--blue);font-size:11px;margin-right:10px}.options{display:grid;gap:9px;margin-top:18px}.options label{display:flex;align-items:flex-start;gap:10px;padding:12px;border:1px solid #e4ebf2;border-radius:12px;cursor:pointer;transition:.15s}.options label:hover{background:#f8fbff;border-color:#cbd9e7}.options input{margin-top:3px}.options span{font-size:14px;line-height:1.5}.quiz-question.correct{border-color:#75c592;background:#f6fff9}.quiz-question.wrong{border-color:#e4a2a2;background:#fff9f9}.large-btn{padding:15px 24px}.quiz-result{margin-top:18px;border-radius:15px;background:var(--navy);color:#fff;padding:20px;display:flex;flex-direction:column;gap:5px}.quiz-result[hidden]{display:none}.quiz-result strong{font-size:21px}.quiz-result span{color:#d9e4ef}.lock-card,.answer-card,.finish-card,.status-banner{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff}.lock-card p,.answer-card p,.finish-card p,.status-banner span{color:var(--muted);line-height:1.65}.answer-card{margin-bottom:12px}.answer-key{font-size:12px;font-weight:800;color:var(--blue);text-transform:uppercase;letter-spacing:.06em}.references p{padding-bottom:14px;border-bottom:1px solid var(--line);line-height:1.65;color:#4c6073}.finish-card{margin-top:30px;background:#f8fbff}.status-banner{display:flex;flex-direction:column;gap:6px;margin:24px 0}.status-banner strong{color:var(--blue)}
@media(max-width:900px){.system-title-grid,.case-grid,.objectives-grid{grid-template-columns:1fr}.case-stepbar{top:74px}.case-card>p{min-height:auto}}
@media(max-width:620px){.narrow,.reading{width:min(100% - 24px,900px)}.case-stepbar{top:74px}.case-stepbar .container{width:100%;padding-left:12px;padding-right:12px}.clinical-card{padding:20px}.case-card{padding:22px}.unit-section{padding:56px 0}}