:root{
  --navy:#062f50;--navy2:#073657;--blue:#0b78b2;--orange:#ff6b00;
  --pale:#eef8fd;--line:#cddfe8;--text:#08213b;--green:#0d8d56;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:var(--pale);line-height:1.62}
.exam-wrap{max-width:1180px;margin:auto;padding:0 18px}
.exam-nav{background:linear-gradient(90deg,#073657,#062f50);border-bottom:3px solid var(--orange);position:sticky;top:0;z-index:999;box-shadow:0 7px 18px rgba(0,20,35,.25)}
.exam-nav-inner{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:11px 18px}
.exam-brand{color:#fff}.exam-brand b{display:block;font-size:16px}.exam-brand small{opacity:.9}
.exam-nav-btns{display:flex;gap:8px;flex-wrap:wrap}
.exam-nav a,.exam-nav span{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:9px 14px;border-radius:10px;text-decoration:none;font-weight:900;font-size:13px}
.exam-prev{background:#284e68;color:white}.exam-home{background:#fff;color:#073657}.exam-module{background:#0b78b2;color:#fff}.exam-next{background:#0782bc;color:#fff}.exam-off{background:#35566d;color:#dce7ed}
.exam-banner-wrap{padding:10px 0 14px}
.exam-banner{display:block;width:100%;height:220px;object-fit:cover;object-position:center;border-radius:16px;box-shadow:0 12px 28px rgba(0,28,48,.22)}
.exam-hero{padding:18px 0 8px}
.exam-kicker{font-size:12px;font-weight:900;color:#0b6c9f;text-transform:uppercase;letter-spacing:.04em}
.exam-title{font-size:36px;line-height:1.08;margin:6px 0 10px}
.exam-subtitle{font-size:18px;margin:0 0 12px}
.exam-chips{display:flex;gap:7px;flex-wrap:wrap}.exam-chip{background:var(--navy2);color:white;border-radius:20px;padding:6px 11px;font-size:12px;font-weight:900}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:20px;align-items:start}
.exam-card{background:white;border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:16px;box-shadow:0 8px 22px rgba(0,35,65,.06)}
.exam-card h2{margin:0 0 10px;font-size:24px}
.exam-card h3{margin:0 0 8px}
.exam-side{position:sticky;top:78px}
.exam-side .exam-card{padding:16px}
.exam-note{background:#edf8ff;border-left:5px solid #0b78b2;border-radius:12px;padding:15px;margin:14px 0}
.exam-alert{background:#fff5e9;border:2px solid #ff9d42;border-radius:15px;padding:16px;margin:14px 0}
.exam-must{background:linear-gradient(135deg,#073657,#0b78b2);color:white}.exam-must h2{color:white}
.exam-grid2{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.exam-figure{margin:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#f8fcfe}
.exam-figure img{display:block;width:100%;height:290px;object-fit:contain;background:white}
.exam-figure figcaption{padding:10px 12px;font-weight:700}
.exam-video{position:relative;padding-top:56.25%;background:#000;border-radius:15px;overflow:hidden}
.exam-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.exam-quiz-btn{display:block;width:100%;text-align:left;padding:12px;margin:7px 0;background:#fff;border:1px solid #cbdde6;border-radius:10px;font-weight:800;cursor:pointer}
.exam-btn{display:inline-block;border:0;border-radius:10px;background:var(--orange);color:#fff;text-decoration:none;padding:11px 15px;font-weight:900;cursor:pointer}
.exam-footer{margin-top:20px;background:#062f50;color:white;padding:18px 0}
.exam-footer-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.exam-small{font-size:13px;color:#526b7e}
@media(max-width:850px){
  .exam-layout{grid-template-columns:1fr}.exam-side{position:static}
  .exam-grid2{grid-template-columns:1fr}.exam-banner{height:180px}
}
@media(max-width:620px){
  .exam-nav-inner{align-items:flex-start}.exam-nav-btns{width:100%}
  .exam-nav a,.exam-nav span{flex:1 1 135px}
  .exam-title{font-size:30px}.exam-banner{height:145px}
}