.about-tabs {
  display:flex;
  gap:12px;
  justify-content:center;
  margin-bottom:40px;
  flex-wrap:wrap;
}

.tab-btn {
  padding:10px 18px;
  border-radius:30px;
  border:1px solid #ddd;
  background:#fff;
  cursor:pointer;
  transition:.3s;
  font-weight:500;
}

.tab-btn.active,
.tab-btn:hover {
  background:var(--primary);
  color:#000;
  border-color:var(--primary);
}

.tab-content {
  display:none;
  animation:fade .4s ease;
}

.tab-content.active {
  display:block;
}

.timeline {
  list-style:none;
  padding-left:0;
}

.timeline li {
  margin-bottom:12px;
}

.timeline span {
  font-weight:600;
  color:var(--primary);
  margin-right:10px;
}

.leader-grid {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}

.leader-card {
  text-align:center;
}

.leader-card img {
  width:160px;
  height:160px;
  border-radius:50%;
  object-fit:cover;
  margin-bottom:12px;
}

@keyframes fade {
  from {opacity:0; transform:translateY(10px)}
  to {opacity:1; transform:none}
}

@media(max-width:768px){
  .leader-grid {grid-template-columns:1fr}
}


/* ===== ABOUT INTRO ===== */
.about-intro {
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:40px;
  align-items:center;
}

.about-image img {
  width:100%;
  border-radius:16px;
  box-shadow:0 20px 40px rgba(0,0,0,.15);
}

/* ===== VISION ===== */
.vision-grid {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:30px;
}

.vision-item {
  background:#fff;
  border-radius:16px;
  overflow:hidden;
  box-shadow:0 15px 35px rgba(0,0,0,.1);
  transition:.3s;
}

.vision-item:hover {
  transform:translateY(-6px);
}

.vision-item img {
  width:100%;
  height:220px;
  object-fit:cover;
}

.vision-item h4 {
  margin:20px;
}

.vision-item p {
  margin:0 20px 24px;
}

/* ===== TIMELINE ===== */
.timeline-wrap {
  position:relative;
  padding-left:40px;
}

.timeline-wrap::before {
  content:'';
  position:absolute;
  left:10px;
  top:0;
  bottom:0;
  width:3px;
  background:var(--primary);
}

.timeline-item {
  display:flex;
  gap:30px;
  margin-bottom:40px;
}

.timeline-year {
  min-width:60px;
  font-weight:700;
  color:var(--primary);
}

.timeline-content {
  background:#fff;
  border-radius:16px;
  padding:20px;
  box-shadow:0 15px 30px rgba(0,0,0,.1);
}

.timeline-content img {
  width:100%;
  height:180px;
  object-fit:cover;
  border-radius:12px;
  margin-bottom:12px;
}

/* ===== LEADERS ===== */
.leader-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:30px;
}

.leader-card {
  text-align:center;
  background:#fff;
  border-radius:18px;
  padding:30px 20px;
  box-shadow:0 15px 30px rgba(0,0,0,.1);
  transition:.3s;
}

.leader-card:hover {
  transform:translateY(-10px);
}

.leader-card.highlight {
  border:3px solid var(--primary);
}

.leader-card img {
  width:140px;
  height:140px;
  border-radius:50%;
  object-fit:cover;
  margin-bottom:16px;
}

.leader-card span {
  color:#666;
  font-size:14px;
}

/* ===== RESPONSIVE ===== */
@media(max-width:992px){
  .about-intro,
  .vision-grid,
  .leader-grid {
    grid-template-columns:1fr;
  }

  .timeline-wrap {
    padding-left:0;
  }

  .timeline-wrap::before {
    left:0;
  }
}


/* ===== GLOBAL CENTER ===== */
.about-page {
  text-align: center;
}

.about-page .container {
  max-width: 1200px;
  margin: auto;
}

/* Tabs center */
.about-tabs {
  justify-content: center;
}

/* Nội dung tab */
.tab-content {
  max-width: 1100px;
  margin: 0 auto;
}

/* Reset cho các block cần căn trái */
.about-text,
.timeline-content,
.leader-card p {
  text-align: left;
}

.about-intro {
  grid-template-columns: 1fr 1fr;
  align-items: center;
  justify-items: center;
}

.about-text {
  max-width: 520px;
}

.timeline-wrap {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 0;
}

.timeline-wrap::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
  transform: translateX(-50%);
}

.timeline-item {
  width: 50%;
  padding: 0 40px;
  position: relative;
  margin-bottom: 60px;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-year {
  position: absolute;
  top: 0;
  font-weight: 700;
  color: var(--primary);
}

.timeline-item:nth-child(odd) .timeline-year {
  right: -30px;
}

.timeline-item:nth-child(even) .timeline-year {
  left: -30px;
}

.timeline-content {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 15px 30px rgba(0,0,0,.1);
}

.timeline-content img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 12px;
}


@media (max-width: 768px) {
  .timeline-wrap::before {
    left: 8px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    left: 0;
    text-align: left;
    padding-left: 40px;
  }

  .timeline-year {
    left: -10px !important;
  }
}


/* =========================
   PAGE BANNER (IMG)
========================= */
.page-banner {
  position: relative;
  height: 420px;
  overflow: hidden;
  margin-top: 60px;
}

/* Ảnh banner */
.banner-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Overlay tối */
.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    rgba(0,0,0,.55),
    rgba(0,0,0,.55)
  );
  z-index: 1;
}

/* Nội dung */
.banner-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  padding: 0 20px;
}

.banner-content span {
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 14px;
  margin-bottom: 12px;
  opacity: .9;
}

.banner-content h1 {
  font-size: 46px;
  font-weight: 700;
  margin-bottom: 12px;
}

.banner-content p {
  font-size: 18px;
  opacity: .9;
  max-width: 680px;
}

/* Responsive */
@media (max-width: 768px) {
  .page-banner {
    height: 300px;
  }

  .banner-content h1 {
    font-size: 32px;
  }

  .banner-content p {
    font-size: 15px;
  }
}

/* =========================
   RESPONSIVE – GLOBAL
========================= */

/* Large screen (>=1400px) */
@media (min-width: 1400px) {
  .banner-content h1 {
    font-size: 52px;
  }

  .about-text {
    max-width: 560px;
  }
}

/* =========================
   TABLET (<=992px)
========================= */
@media (max-width: 992px) {

  /* Banner */
  .page-banner {
    height: 340px;
  }

  .banner-overlay {
    background: linear-gradient(
      rgba(0,0,0,.5),
      rgba(0,0,0,.6)
    );
  }

  .banner-content h1 {
    font-size: 36px;
  }

  .banner-content p {
    font-size: 16px;
  }

  /* Tabs */
  .about-tabs {
    gap: 10px;
  }

  .tab-btn {
    padding: 9px 16px;
    font-size: 14px;
  }

  /* About intro */
  .about-intro {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .about-text {
    max-width: 100%;
    text-align: center;
  }

  .about-text p {
    text-align: left;
  }

  /* Vision */
  .vision-grid {
    grid-template-columns: 1fr;
  }

  /* Leaders */
  .leader-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* =========================
   MOBILE (<=768px)
========================= */
@media (max-width: 768px) {

  /* Banner */
  .page-banner {
    height: 280px;
    margin-top: 50px;
  }

  .banner-overlay {
    background: linear-gradient(
      rgba(0,0,0,.45),
      rgba(0,0,0,.65)
    );
  }

  .banner-content span {
    font-size: 12px;
    letter-spacing: 1.5px;
  }

  .banner-content h1 {
    font-size: 28px;
    line-height: 1.2;
  }

  .banner-content p {
    font-size: 14px;
    max-width: 90%;
  }

  /* Tabs */
  .about-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 10px;
  }

  .about-tabs::-webkit-scrollbar {
    display: none;
  }

  .tab-btn {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 13px;
    padding: 8px 14px;
  }

  /* About intro */
  .about-image img {
    border-radius: 14px;
  }

  /* Timeline */
  .timeline-wrap {
    padding: 20px 0;
  }

  .timeline-wrap::before {
    left: 6px;
  }

  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 32px;
    padding-right: 0;
    margin-bottom: 40px;
    text-align: left !important;
  }

  .timeline-year {
    left: -8px !important;
    font-size: 14px;
  }

  /* Leaders */
  .leader-grid {
    grid-template-columns: 1fr;
  }

  .leader-card {
    padding: 26px 18px;
  }
}

/* =========================
   SMALL MOBILE (<=480px)
========================= */
@media (max-width: 480px) {

  .page-banner {
    height: 240px;
  }

  .banner-content h1 {
    font-size: 24px;
  }

  .banner-content p {
    font-size: 13px;
  }

  .tab-btn {
    font-size: 12px;
    padding: 7px 12px;
  }

  .about-text h3 {
    font-size: 20px;
  }

  .timeline-content img {
    height: 150px;
  }
}

/* =========================
   ABOUT TABS – FIX SCROLL
========================= */
.about-tabs {
  display: flex;
  gap: 12px;

  /* quan trọng */
  overflow-x: auto;
  overflow-y: hidden;

  padding: 8px 16px 14px;
  margin: 0 -16px 40px;

  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.about-tabs::-webkit-scrollbar {
  display: none;
}

/* từng tab */
.tab-btn {
  flex-shrink: 0;
  white-space: nowrap;

  scroll-snap-align: start;

  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid #e3e3e3;
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: .25s ease;
}

/* active */
.tab-btn.active {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
}
@media (max-width: 768px) {
  .about-tabs {
    justify-content: flex-start;
    padding-left: 20px;
    padding-right: 20px;
  }

  .tab-btn {
    font-size: 13px;
    padding: 8px 16px;
  }
}


/* ===== LEADERS UPGRADE ===== */
.leader-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.leader-card {
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0,0,0,.12);
  transition: .4s ease;
  text-align: center;
  padding-bottom: 30px;
  position: relative;
}

.leader-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 35px 70px rgba(0,0,0,.18);
}

/* ẢNH FULL WIDTH */
.leader-card img {
  width: 100%;
  height: 320px;         /* 🔥 to hơn rất nhiều */
  object-fit: cover;     /* full ảnh không méo */
  border-radius: 0;      /* bỏ hình tròn */
}

/* Highlight card */
.leader-card.highlight {
  border: 4px solid var(--primary);
}

/* TÊN */
.leader-card h5 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 22px;
  margin-bottom: 6px;
}

/* CHỨC VỤ */
.leader-card span {
  font-size: 15px;
  color: #777;
  letter-spacing: .5px;
}

/* Responsive */
@media(max-width: 992px){
  .leader-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media(max-width: 768px){
  .leader-grid {
    grid-template-columns: 1fr;
  }

  .leader-card img {
    height: 260px;
  }
}