/* ===========================================================
   LANDING PAGE SEO STYLE — HocLaiXeSG
   Dùng cho: /thithu/hang-b/, /thithu/hang-c1/,
            /thithu/60-cau-diem-liet/, /thithu/meo-thi-600-cau/
   =========================================================== */

:root {
  --lp-blue: #1565C0;
  --lp-blue-dark: #0D47A1;
  --lp-red: #C62828;
  --lp-orange: #FB8C00;
  --lp-green: #2E7D32;
  --lp-paper: #F8FAFC;
  --lp-card: #fff;
  --lp-ink: #0F172A;
  --lp-muted: #64748B;
  --lp-border: #E2E8F0;
  --lp-radius: 12px;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--lp-ink);
  background: var(--lp-paper);
  line-height: 1.65;
  margin: 0;
  padding: 0;
}

/* ---- Breadcrumb ---- */
.lp-breadcrumb {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px 16px 0;
  font-size: 13px;
  color: var(--lp-muted);
}
.lp-breadcrumb a { color: var(--lp-blue); text-decoration: none; font-weight: 600; }
.lp-breadcrumb a:hover { text-decoration: underline; }
.lp-breadcrumb span { margin: 0 6px; opacity: .6; }

/* ---- Hero ---- */
.lp-hero {
  max-width: 880px;
  margin: 20px auto;
  padding: 0 16px;
  text-align: center;
}
.lp-hero h1 {
  font-size: clamp(22px, 4.5vw, 36px);
  line-height: 1.25;
  color: var(--lp-blue-dark);
  margin: 0 0 12px;
  font-weight: 800;
}
.lp-subtitle {
  font-size: clamp(14px, 2.5vw, 16px);
  color: var(--lp-muted);
  max-width: 720px;
  margin: 0 auto 24px;
}

/* ---- CTA Row ---- */
.lp-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-top: 8px;
}
.lp-cta {
  display: inline-block;
  padding: 14px 24px;
  border-radius: var(--lp-radius);
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  text-align: center;
  transition: transform .15s ease, box-shadow .15s ease;
  border: 0;
  cursor: pointer;
}
.lp-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,0,0,.12); }
.lp-cta-primary { background: linear-gradient(135deg, var(--lp-blue), var(--lp-blue-dark)); color: #fff; }
.lp-cta-zalo { background: #0068FF; color: #fff; }

/* ---- Info Grid ---- */
.lp-info-grid {
  max-width: 880px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.lp-info-card {
  background: var(--lp-card);
  border: 1px solid var(--lp-border);
  border-radius: var(--lp-radius);
  padding: 16px 12px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(15,23,42,.04);
}
.lp-info-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--lp-blue-dark);
  line-height: 1;
}
.lp-info-label {
  font-size: 12px;
  color: var(--lp-muted);
  margin-top: 6px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .3px;
}
@media (max-width: 640px) {
  .lp-info-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- Main content ---- */
.lp-main {
  max-width: 880px;
  margin: 24px auto;
  padding: 0 16px;
  background: var(--lp-card);
  border: 1px solid var(--lp-border);
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: 0 2px 8px rgba(15,23,42,.05);
}
@media (max-width: 640px) {
  .lp-main { padding: 24px 16px; }
}
.lp-main h2 {
  font-size: clamp(18px, 3.5vw, 22px);
  color: var(--lp-blue-dark);
  margin: 28px 0 12px;
  padding-top: 16px;
  border-top: 2px solid #E2E8F0;
  line-height: 1.35;
}
.lp-main h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.lp-main h3 {
  font-size: 17px;
  color: var(--lp-ink);
  margin: 18px 0 8px;
}
.lp-main p { margin: 0 0 12px; color: #334155; }
.lp-main ul, .lp-main ol { padding-left: 22px; margin: 0 0 14px; color: #334155; }
.lp-main li { margin: 6px 0; }
.lp-main strong { color: var(--lp-ink); }
.lp-main a { color: var(--lp-blue); text-decoration: underline; font-weight: 600; }
.lp-main a:hover { color: var(--lp-blue-dark); }

/* ---- FAQ Accordion ---- */
.lp-faq {
  background: #F8FAFC;
  border: 1px solid var(--lp-border);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 10px 0;
  cursor: pointer;
}
.lp-faq summary {
  font-weight: 700;
  color: var(--lp-ink);
  outline: none;
  padding: 4px 0;
}
.lp-faq summary::marker { color: var(--lp-blue); }
.lp-faq p { margin: 8px 0 4px; color: #475569; }

/* ---- Step Grid ---- */
.lp-step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 12px;
}
@media (max-width: 768px) { .lp-step-grid { grid-template-columns: repeat(2, 1fr); } }
.lp-step {
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
  border: 1px solid #BFDBFE;
  border-radius: 12px;
  padding: 16px 14px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: transform .15s ease;
}
.lp-step:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(13,71,161,.15); }
.lp-step-zalo { background: linear-gradient(135deg, #DBEAFE, #BFDBFE); border-color: #93C5FD; }
.lp-step-num {
  width: 32px;
  height: 32px;
  background: var(--lp-blue);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 14px;
  margin-bottom: 8px;
}
.lp-step-title { font-weight: 800; font-size: 14px; color: var(--lp-blue-dark); margin-bottom: 4px; }
.lp-step-desc { font-size: 12px; color: var(--lp-muted); }

/* ---- Author Box ---- */
.lp-author {
  max-width: 880px;
  margin: 24px auto;
  padding: 16px;
  background: linear-gradient(135deg, #F0F9FF, #E0F2FE);
  border: 1px solid #BAE6FD;
  border-radius: 14px;
  display: flex;
  gap: 16px;
  align-items: center;
}
.lp-author img {
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.lp-author h3 {
  font-size: 17px;
  color: var(--lp-blue-dark);
  margin: 0 0 4px;
  font-weight: 800;
}
.lp-author p { margin: 2px 0; font-size: 13px; color: #475569; }
.lp-author a { color: var(--lp-blue); text-decoration: none; font-weight: 700; }
.lp-author a:hover { text-decoration: underline; }
@media (max-width: 480px) {
  .lp-author { flex-direction: column; text-align: center; }
}

/* ---- CTA Box ---- */
.lp-cta-box {
  max-width: 880px;
  margin: 32px auto;
  padding: 28px 24px;
  background: linear-gradient(135deg, var(--lp-blue), var(--lp-blue-dark));
  color: #fff;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 12px 32px rgba(13,71,161,.25);
}
.lp-cta-box h3 {
  font-size: clamp(18px, 3vw, 22px);
  margin: 0 0 8px;
  color: #fff;
}
.lp-cta-box p { margin: 0 0 16px; opacity: .95; font-size: 14px; }
.lp-cta-box .lp-cta-zalo { font-size: 16px; padding: 14px 28px; }

/* ---- Print-friendly ---- */
@media print {
  .lp-cta-row, .lp-step-grid, .lp-cta-box, .lp-author { display: none; }
  body { background: #fff; }
  .lp-main { border: 0; box-shadow: none; }
}