.rdo { background: var(--bg-soft); padding: 48px 64px 52px; }
.rdo-in { max-width: 1120px; margin: 0 auto; }

.osd-panel { display:grid; grid-template-columns: 0.74fr 1.45fr; background:#fff;
  border:1px solid var(--border-s); border-radius: var(--r-l); overflow:hidden; box-shadow: var(--sh-m); }

.osd-media { position:relative; min-height:220px; }
.osd-media img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.osd-pill { position:absolute; top:14px; left:14px; z-index:2; display:inline-flex; align-items:center; gap:9px;
  background:rgba(255,255,255,.96); backdrop-filter:blur(6px); border-radius:99px; padding:6px 14px 6px 10px; box-shadow:var(--sh-xs); white-space:nowrap; }
.osd-pill i { color:var(--red); font-size:16px; flex:none; }
.osd-pill span { font-size:11.5px; font-weight:700; color:var(--red); flex:none; }
.osd-cap { position:absolute; left:16px; bottom:14px; right:16px; z-index:2; color:#fff; font-size:12px;
  font-weight:500; text-shadow:0 1px 8px rgba(0,0,0,.6); }

.osd-body { padding:28px 34px; display:flex; flex-direction:column; justify-content:center; gap:18px; }
.osd-top { display:flex; justify-content:space-between; align-items:center; gap:28px; }
.osd-top .eyebrow { font-size:12px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:var(--red); margin-bottom:8px; }
.osd-top h2 { font-size:23px; font-weight:800; letter-spacing:-.02em; line-height:1.18; max-width:560px; }
.osd-hl { color: var(--red); }
/* Đoạn mô tả ÖSD (dưới h2, trên dải huy hiệu) — sửa qua PageContent section_titles.osd_trust.sub */
.osd-desc { font-size: 14.5px; color: var(--text-2); line-height: 1.6; max-width: 720px; margin-top: -4px; }
.osd-cta { flex:none; display:inline-flex; align-items:center; gap:8px; background:var(--red); color:#fff; font-weight:700;
  font-size:14px; padding:12px 20px; border-radius:var(--r-m); box-shadow:var(--sh-red); transition:.2s; white-space:nowrap; }
.osd-cta:hover { background:var(--red-deep); transform:translateY(-2px); }

.osd-creds { display:flex; border-top:1px solid var(--border-s); padding-top:18px; }
.osd-cred { flex:1; display:flex; gap:11px; align-items:center; padding:0 16px; border-left:1px solid var(--border-s); }
.osd-cred:first-child { padding-left:0; border-left:none; }
.osd-cred i { color:var(--red); font-size:19px; background:var(--red-light); width:38px; height:38px;
  display:grid; place-items:center; border-radius:10px; flex:none; }
.osd-cred b { font-size:12.8px; display:block; line-height:1.2; margin-bottom:2px; }
.osd-cred span { font-size:11px; color:var(--text-2); display:block; line-height:1.3; }

@media (max-width: 920px){
  .rdo { padding:36px 20px 44px; }
  .osd-panel { grid-template-columns:1fr; }
  .osd-media { min-height:180px; }
  .osd-body { padding:24px; }
  .osd-top { flex-direction:column; align-items:flex-start; gap:16px; }
  .osd-creds { flex-wrap:wrap; gap:16px 0; }
  .osd-cred { flex:1 1 45%; border-left:none; padding:0; }
}

/* ═══════════ #38 — Trang CẤP luyện thi ÖSD (a1/a2/b1/b2) — port osd-level-v1.html ═══════════
   Prefix osdl- (osd level) để không đè các class osd- / lth- / kh- đang có. Chỉ token brand (quy tắc 3). */
.osdl-hero { display: grid; grid-template-columns: 1.3fr .95fr; gap: 26px; align-items: start;
  background: linear-gradient(135deg, #fff, #FFFDF7); border: 1px solid var(--border-s);
  border-radius: var(--r-l); padding: 32px; box-shadow: var(--sh-m); margin-bottom: 14px; }
.osdl-eyebrow { display: inline-flex; align-items: center; gap: 7px; background: var(--gold-soft);
  color: var(--gold-deep); font-weight: 800; font-size: 12px; padding: 6px 14px; border-radius: 999px; }
.osdl-h1 { font-size: 31px; font-weight: 900; letter-spacing: -.7px; line-height: 1.13; margin: 15px 0 11px; }
.osdl-h1 em { color: var(--red); font-style: normal; }
.osdl-desc { font-size: 15px; color: var(--text-2); line-height: 1.7; margin: 0 0 16px; }
.osdl-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.osdl-chip { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700;
  color: var(--text); background: #fff; border: 1px solid var(--border-s); border-radius: 999px;
  padding: 7px 13px; box-shadow: var(--sh-xs); }
.osdl-chip i { color: var(--red); font-size: 15px; }
.osdl-acts { display: flex; gap: 10px; flex-wrap: wrap; }
.osdl-btn-go { display: inline-flex; align-items: center; gap: 8px; background: var(--red); color: #fff;
  font-weight: 800; font-size: 14.5px; padding: 13px 22px; border-radius: 12px; text-decoration: none;
  box-shadow: 0 8px 20px rgba(209,32,38,.22); }
.osdl-btn-go:hover { background: var(--red-deep); }
.osdl-btn-ghost { display: inline-flex; align-items: center; gap: 8px; background: #fff; color: var(--red);
  border: 1.6px solid var(--red); font-weight: 800; font-size: 14.5px; padding: 12px 20px;
  border-radius: 12px; text-decoration: none; }
.osdl-btn-ghost:hover { background: var(--red); color: #fff; }

/* Thẻ chứng chỉ = cấu trúc đề */
.osdl-seal { background: #fff; border: 1px solid var(--border-s); border-top: 4px solid var(--gold);
  border-radius: 20px; padding: 20px 22px; box-shadow: var(--sh-m); }
.osdl-seal-h { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.osdl-seal-badge { width: 48px; height: 48px; border-radius: 13px; background: var(--gold-soft);
  color: var(--gold-deep); display: flex; align-items: center; justify-content: center; font-size: 25px; flex: none; }
.osdl-seal-h b { font-size: 17px; font-weight: 900; display: block; line-height: 1.2; }
.osdl-seal-h span { font-size: 12px; color: var(--text-2); }
.osdl-seal-grp { display: flex; justify-content: space-between; align-items: center; font-size: 10.5px;
  font-weight: 800; letter-spacing: .04em; text-transform: uppercase; color: var(--red); margin: 13px 0 3px; }
.osdl-seal-grp .tt { background: var(--red-light); padding: 1px 9px; border-radius: 999px; font-size: 10px; }
.osdl-seal-row { display: flex; justify-content: space-between; align-items: center; padding: 7px 0;
  border-bottom: 1px dashed var(--border-s); }
.osdl-seal-row.last { border-bottom: none; }
.osdl-seal-row .l { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 14px; }
.osdl-seal-row .l i { color: var(--red); font-size: 18px; width: 20px; text-align: center; }
.osdl-seal-row .r { font-weight: 800; font-size: 13.5px; white-space: nowrap; }
.osdl-seal-row .r .p { color: var(--green); }
.osdl-seal-row .r .cb { color: var(--text-3); font-weight: 600; font-size: 11.5px; }
.osdl-seal-pass { margin-top: 13px; background: var(--green-bg); color: var(--green); font-weight: 800;
  font-size: 13px; text-align: center; padding: 9px; border-radius: 10px; }
.osdl-seal-note { font-size: 11px; color: var(--text-3); text-align: center; margin-top: 8px; line-height: 1.4; }

/* Section chung của trang cấp */
.osdl-sec { background: #fff; border: 1px solid var(--border-s); border-radius: 18px; padding: 22px 24px;
  margin-bottom: 14px; box-shadow: var(--sh-xs); }
.osdl-sec-eyebrow { font-size: 11.5px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  color: var(--red); margin-bottom: 5px; }
.osdl-sec-h2 { font-size: 20px; font-weight: 800; margin: 0 0 4px; letter-spacing: -.3px; }
.osdl-sec-sub { font-size: 13.5px; color: var(--text-2); margin: 0 0 16px; }

/* Syllabus (4 kỹ năng) */
.osdl-syl { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.osdl-syl-c { border: 1px solid var(--border-s); border-radius: 14px; padding: 16px;
  background: linear-gradient(180deg, #fff, #FCFBF9); }
.osdl-syl-h { display: flex; align-items: center; gap: 9px; margin-bottom: 9px; }
.osdl-syl-h i { width: 34px; height: 34px; border-radius: 10px; background: var(--red); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 17px; }
.osdl-syl-h b { font-size: 14.5px; font-weight: 800; }
.osdl-syl-h small { font-size: 11px; color: var(--text-3); font-weight: 600; }
.osdl-syl ul { margin: 0 0 10px; padding: 0; list-style: none; }
.osdl-syl li { position: relative; padding-left: 18px; font-size: 12.5px; color: var(--text-2);
  line-height: 1.5; margin-bottom: 4px; }
.osdl-syl li::before { content: ""; position: absolute; left: 3px; top: 8px; width: 5px; height: 5px;
  border-radius: 50%; background: var(--red-border); }
.osdl-kq { display: flex; gap: 7px; align-items: flex-start; background: var(--green-bg); border-radius: 9px;
  padding: 8px 10px; font-size: 12px; color: var(--green); font-weight: 700; line-height: 1.45; }
.osdl-kq i { font-size: 15px; flex: none; margin-top: 1px; }

/* Phương pháp */
.osdl-mth { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-top: 14px; }
.osdl-mth-c { display: flex; gap: 12px; align-items: flex-start; background: var(--bg-soft);
  border: 1px solid var(--border-s); border-radius: 13px; padding: 14px; }
.osdl-mth-c i { width: 40px; height: 40px; flex: none; border-radius: 11px; background: #fff;
  border: 1px solid var(--red-border); color: var(--red); display: flex; align-items: center;
  justify-content: center; font-size: 20px; }
.osdl-mth-c b { font-size: 13.5px; font-weight: 800; display: block; margin-bottom: 2px; }
.osdl-mth-c span { font-size: 12.5px; color: var(--text-2); line-height: 1.5; }

/* Lộ trình timeline */
.osdl-tl { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 6px; }
.osdl-tl-s { position: relative; padding: 0 10px; text-align: center; }
.osdl-tl-s::before { content: ""; position: absolute; top: 18px; left: -50%; width: 100%; height: 2px;
  background: var(--red-border); }
.osdl-tl-s:first-child::before { display: none; }
.osdl-tl-dot { position: relative; z-index: 1; width: 38px; height: 38px; border-radius: 50%;
  background: var(--red); color: #fff; font-weight: 800; display: flex; align-items: center;
  justify-content: center; margin: 0 auto 9px; box-shadow: 0 4px 12px rgba(209,32,38,.25); }
.osdl-tl-s b { display: block; font-size: 13.5px; font-weight: 800; margin-bottom: 3px; }
.osdl-tl-s span { font-size: 12px; color: var(--text-2); line-height: 1.45; }

/* CTA */
.osdl-cta { background: linear-gradient(135deg, #B3161B, var(--red)); border-radius: 20px; padding: 32px;
  text-align: center; color: #fff; box-shadow: var(--sh-m); margin-bottom: 14px; }
.osdl-cta h2 { font-size: 23px; font-weight: 900; margin: 0 0 8px; color: #fff; letter-spacing: -.3px; }
.osdl-cta p { font-size: 14px; color: rgba(255,255,255,.9); margin: 0 0 20px; }
.osdl-cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.osdl-cta a { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 14.5px;
  padding: 13px 24px; border-radius: 12px; text-decoration: none; }
.osdl-cta .b1 { background: #fff; color: var(--red); }
.osdl-cta .b2 { background: rgba(255,255,255,.14); color: #fff; border: 1.5px solid rgba(255,255,255,.5); }

@media (max-width: 820px) {
  .osdl-hero { grid-template-columns: 1fr; }
  .osdl-syl, .osdl-mth { grid-template-columns: 1fr; }
  .osdl-tl { grid-template-columns: 1fr; gap: 14px; }
  .osdl-tl-s::before { display: none; }
  .osdl-tl-s { display: flex; gap: 12px; text-align: left; }
  .osdl-tl-dot { margin: 0; }
  .osdl-h1 { font-size: 25px; }
}