/* ═══════════════════════════════════════════════════════════
   TRANG GIỚI THIỆU — about.css
   Màu: #003399 (navy) | #ffff00 (yellow)
═══════════════════════════════════════════════════════════ */

/* ── BASE ── */
.ab-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.ab-section { padding: 80px 0; }
.ab-section__header { text-align: center; margin-bottom: 56px; }
.ab-section__header h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800; color: #003399; margin-bottom: 12px; line-height: 1.2;
}
.ab-section__header p { color: #4a5a8e; font-size: 1rem; max-width: 560px; margin: 0 auto; }

.ab-tag {
  display: inline-block;
  background: #003399; color: #ffff00;
  font-size: .72rem; font-weight: 800;
  letter-spacing: .1em; text-transform: uppercase;
  padding: 5px 16px; border-radius: 20px; margin-bottom: 12px;
}
.ab-tag--white { background: rgba(255,255,255,.2); color: #fff; border: 1px solid rgba(255,255,255,.4); }

/* ── BUTTONS ── */
.ab-btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 28px; border-radius: 8px;
  font-weight: 700; font-size: .92rem;
  text-decoration: none; cursor: pointer;
  border: 2px solid transparent;
  transition: all .3s ease; white-space: nowrap;
}
.ab-btn--yellow { background: #ffff00; color: #003399; border-color: #ffff00; }
.ab-btn--yellow:hover { background: #e6e600; border-color: #e6e600; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,255,0,.35); }
.ab-btn--outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.ab-btn--outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.ab-btn--ghost { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.3); }
.ab-btn--ghost:hover { background: rgba(255,255,255,.2); }
.ab-btn--lg { padding: 15px 34px; font-size: 1rem; border-radius: 10px; }

/* ══════════════════════════════════════
   HERO
══════════════════════════════════════ */
.ab-hero {
  position: relative;
  background: linear-gradient(135deg, #001a66 0%, #003399 50%, #1a4db3 100%);
  padding: 120px 0 80px;
  overflow: hidden;
}
.ab-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M50 50c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10s-10-4.477-10-10 4.477-10 10-10zM10 10c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10S0 25.523 0 20s4.477-10 10-10z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.ab-hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(0,20,80,.6) 0%, transparent 100%);
}
.ab-hero .ab-container { position: relative; z-index: 1; }
.ab-hero__content { max-width: 700px; }
.ab-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .8rem; color: rgba(255,255,255,.65);
  margin-bottom: 20px;
}
.ab-breadcrumb a { color: #ffff00; text-decoration: none; transition: opacity .2s; }
.ab-breadcrumb a:hover { opacity: .8; }
.ab-breadcrumb i { font-size: .7rem; }
.ab-hero__content h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900; color: #fff; line-height: 1.15; margin-bottom: 16px;
}
.ab-hero__content h1 span { color: #ffff00; }
.ab-hero__content p { color: rgba(255,255,255,.82); font-size: 1.05rem; line-height: 1.7; }

/* ══════════════════════════════════════
   STATS BAR
══════════════════════════════════════ */
.ab-statsbar {
  background: #ffff00;
  padding: 0;
  box-shadow: 0 4px 20px rgba(0,51,153,.2);
}
.ab-statsbar__inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.ab-stat {
  padding: 22px 24px; text-align: center;
  border-right: 1px solid rgba(0,51,153,.15);
  transition: background .25s;
}
.ab-stat:last-child { border-right: none; }
.ab-stat:hover { background: rgba(0,51,153,.06); }
.ab-stat strong {
  display: block; font-size: 1.8rem; font-weight: 900;
  color: #003399; line-height: 1;
}
.ab-stat span { font-size: .78rem; color: #002277; font-weight: 600; margin-top: 4px; display: block; }
@media (max-width: 768px) { .ab-statsbar__inner { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .ab-statsbar__inner { grid-template-columns: 1fr 1fr; } }

/* ══════════════════════════════════════
   INTRO SECTION
══════════════════════════════════════ */
.ab-intro { background: #fff; }
.ab-intro__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.ab-intro__content h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 900; color: #003399; line-height: 1.2; margin-bottom: 16px;
}
.ab-intro__lead {
  font-size: 1.05rem; color: #003399; font-weight: 600;
  line-height: 1.7; margin-bottom: 16px;
  padding-left: 16px; border-left: 4px solid #ffff00;
}
.ab-intro__content p {
  color: #4a5a8e; font-size: .95rem; line-height: 1.8; margin-bottom: 14px;
}
.ab-intro__features {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin-top: 28px;
}
.ab-intro__feature {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px; background: #f0f4ff;
  border-radius: 10px; border: 1px solid #ccd6f6;
  transition: all .25s ease;
}
.ab-intro__feature:hover { border-color: #003399; background: #e8eeff; transform: translateY(-2px); }
.ab-intro__feature-icon {
  width: 38px; height: 38px; flex-shrink: 0;
  background: #003399; color: #ffff00;
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
}
.ab-intro__feature strong { display: block; font-size: .85rem; font-weight: 700; color: #003399; margin-bottom: 3px; }
.ab-intro__feature span { font-size: .78rem; color: #4a5a8e; line-height: 1.5; }

/* Media */
.ab-intro__media { position: relative; }
.ab-intro__img-main {
  border-radius: 20px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,51,153,.2);
  aspect-ratio: 4/3;
  background: #e8eeff;
}
.ab-intro__img-main img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ab-intro__img-placeholder {
  width: 100%; height: 100%; min-height: 300px;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; color: #ccd6f6;
}
.ab-intro__img-badge {
  position: absolute; bottom: -20px; left: -20px;
  background: #fff; border-radius: 14px; padding: 14px 18px;
  box-shadow: 0 8px 32px rgba(0,51,153,.18);
  border: 2px solid #ffff00;
}
.ab-intro__badge-item { display: flex; align-items: center; gap: 12px; }
.ab-intro__badge-item > i { font-size: 1.6rem; color: #ffff00; background: #003399; padding: 10px; border-radius: 10px; }
.ab-intro__badge-item strong { display: block; font-size: .88rem; font-weight: 800; color: #003399; }
.ab-intro__badge-item span { font-size: .75rem; color: #4a5a8e; }

@media (max-width: 1024px) { .ab-intro__inner { grid-template-columns: 1fr; gap: 40px; } .ab-intro__img-badge { left: 10px; } }
@media (max-width: 600px) { .ab-intro__features { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════
   PRODUCTS INTRO
══════════════════════════════════════ */
.ab-products-intro { background: #f0f4ff; }
.ab-products__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.ab-product-card {
  background: #fff; border-radius: 16px; padding: 28px 24px;
  border: 1.5px solid #ccd6f6;
  box-shadow: 0 2px 16px rgba(0,51,153,.07);
  transition: all .3s ease;
  display: flex; flex-direction: column; gap: 12px;
}
.ab-product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,51,153,.16);
  border-color: #003399;
}
.ab-product-card__icon-wrap {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, #003399, #1a4db3);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: #ffff00;
  overflow: hidden;
}
.ab-product-card__icon-wrap img { width: 100%; height: 100%; object-fit: cover; }
.ab-product-card h3 { font-size: 1.05rem; font-weight: 800; color: #003399; margin: 0; }
.ab-product-card p { font-size: .85rem; color: #4a5a8e; line-height: 1.65; flex: 1; margin: 0; }
.ab-product-card__link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .82rem; font-weight: 700; color: #003399;
  text-decoration: none; margin-top: 4px;
  transition: gap .25s ease;
}
.ab-product-card:hover .ab-product-card__link { gap: 10px; color: #ffff00; }
.ab-product-card:hover .ab-product-card__link { color: #003399; }

@media (max-width: 900px) { .ab-products__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .ab-products__grid { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════
   QUALITY SECTION
══════════════════════════════════════ */
.ab-quality { background: #003399; position: relative; overflow: hidden; }
.ab-quality__bg {
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.ab-quality__inner {
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 64px; align-items: center; position: relative; z-index: 1;
}
.ab-quality__left h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 900; color: #fff; line-height: 1.2; margin-bottom: 16px; }
.ab-quality__left p { color: rgba(255,255,255,.78); font-size: .95rem; line-height: 1.8; margin-bottom: 14px; }
.ab-quality__left .ab-btn--yellow { margin-top: 12px; }
.ab-quality__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ab-quality-item {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: 14px; padding: 24px 20px;
  transition: all .3s ease;
}
.ab-quality-item:hover { background: rgba(255,255,255,.14); transform: translateY(-3px); }
.ab-quality-item__num {
  font-size: 2rem; font-weight: 900; color: #ffff00;
  line-height: 1; margin-bottom: 10px; opacity: .8;
}
.ab-quality-item h4 { font-size: .92rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.ab-quality-item p { font-size: .8rem; color: rgba(255,255,255,.65); line-height: 1.6; margin: 0; }
@media (max-width: 1024px) { .ab-quality__inner { grid-template-columns: 1fr; gap: 40px; } }
@media (max-width: 600px) { .ab-quality__grid { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════
   BRANCHES
══════════════════════════════════════ */
.ab-branches { background: #fff; }
.ab-branches__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.ab-branch-card {
  background: #f0f4ff; border-radius: 16px; padding: 24px;
  border: 1.5px solid #ccd6f6;
  transition: all .3s ease; display: flex; flex-direction: column; gap: 16px;
}
.ab-branch-card:hover { border-color: #003399; box-shadow: 0 12px 40px rgba(0,51,153,.14); transform: translateY(-4px); }
.ab-branch-card__header { display: flex; align-items: center; gap: 12px; }
.ab-branch-card__icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: #003399; color: #ffff00;
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.ab-branch-card__header h3 { font-size: 1rem; font-weight: 800; color: #003399; margin: 0; line-height: 1.3; }
.ab-branch-card__list { list-style: none; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.ab-branch-card__list li { display: flex; align-items: flex-start; gap: 8px; font-size: .8rem; color: #4a5a8e; line-height: 1.5; }
.ab-branch-card__list li i { color: #003399; font-size: .6rem; margin-top: 5px; flex-shrink: 0; }
.ab-branch-card__phone {
  display: inline-flex; align-items: center; gap: 8px;
  background: #003399; color: #ffff00;
  padding: 9px 16px; border-radius: 8px;
  font-size: .85rem; font-weight: 700; text-decoration: none;
  transition: background .25s; align-self: flex-start;
}
.ab-branch-card__phone:hover { background: #002277; }
@media (max-width: 1100px) { .ab-branches__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .ab-branches__grid { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════
   CTA SECTION
══════════════════════════════════════ */
.ab-cta {
  background: linear-gradient(135deg, #001a66 0%, #003399 60%, #1a4db3 100%);
  position: relative; overflow: hidden;
}
.ab-cta::before {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffff00' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.ab-cta__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.ab-cta__text h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); font-weight: 900; color: #fff; margin-bottom: 14px; }
.ab-cta__text p { color: rgba(255,255,255,.8); font-size: .95rem; line-height: 1.75; margin-bottom: 28px; }
.ab-cta__info { display: flex; flex-direction: column; gap: 16px; }
.ab-cta__info-item { display: flex; align-items: flex-start; gap: 14px; }
.ab-cta__info-item > i {
  width: 40px; height: 40px; flex-shrink: 0;
  background: rgba(255,255,0,.15); color: #ffff00;
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: .95rem;
}
.ab-cta__info-item span { display: block; font-size: .75rem; color: rgba(255,255,255,.55); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 3px; }
.ab-cta__info-item a, .ab-cta__info-item div > span:last-child {
  font-size: .92rem; font-weight: 700; color: #fff; text-decoration: none;
}
.ab-cta__info-item a:hover { color: #ffff00; }
.ab-cta__actions { display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 900px) { .ab-cta__inner { grid-template-columns: 1fr; gap: 40px; } }
@media (max-width: 768px) { .ab-section { padding: 56px 0; } .ab-hero { padding: 100px 0 60px; } }