/* ==========================================================================
   HATI SOLUTIONS - TRANG GIỚI THIỆU DOANH NGHIỆP
   Tuân thủ nghiêm ngặt quy tắc GEMINI.md:
   - 100% CSS thuần, đặt tên class ngữ nghĩa
   - Không spam utility classes Bootstrap, không inline styles
   - Hỗ trợ toàn diện Light Mode và Dark Mode
   - Bố cục vững vàng, chuẩn khung hình, nút bấm border-radius <= 12px
   - Chuẩn SEO Heading: Đúng 1 H1, đúng 2 H2, đúng 4 H3, 0 H4-H6
   ========================================================================== */

:root {
  --ab-primary: #D32F2F;
  --ab-primary-hover: #B71C1C;
  --ab-primary-light: rgba(211, 47, 47, 0.08);
  --ab-primary-glow: rgba(211, 47, 47, 0.2);

  --ab-accent-blue: #0284C7;
  --ab-accent-blue-bg: rgba(2, 132, 199, 0.08);
  --ab-accent-green: #059669;
  --ab-accent-green-bg: rgba(5, 150, 105, 0.08);

  --ab-bg: #F8FAFC;
  --ab-card-bg: #FFFFFF;
  --ab-card-border: #E2E8F0;
  --ab-card-border-hover: #CBD5E1;
  --ab-inner-bg: #F1F5F9;

  --ab-text-heading: #0F172A;
  --ab-text-body: #334155;
  --ab-text-muted: #64748B;
  --ab-text-subtle: #94A3B8;

  --ab-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --ab-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.07);
  --ab-shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.1);

  --ab-radius-lg: 12px;
  --ab-radius-md: 10px;
  --ab-radius-sm: 8px;
  --ab-radius-btn: 10px; /* Nút bấm không vượt quá 12px */

  --ab-font-heading: 'Plus Jakarta Sans', sans-serif;
  --ab-font-body: 'Inter', sans-serif;
}

html[data-theme="dark"] {
  --ab-primary: #EF4444;
  --ab-primary-hover: #DC2626;
  --ab-primary-light: rgba(239, 68, 68, 0.15);
  --ab-primary-glow: rgba(239, 68, 68, 0.3);

  --ab-accent-blue: #38BDF8;
  --ab-accent-blue-bg: rgba(56, 189, 248, 0.12);
  --ab-accent-green: #10B981;
  --ab-accent-green-bg: rgba(16, 185, 129, 0.12);

  --ab-bg: #0B0F19;
  --ab-card-bg: #131B2E;
  --ab-card-border: #1E293B;
  --ab-card-border-hover: #334155;
  --ab-inner-bg: #0E1626;

  --ab-text-heading: #F8FAFC;
  --ab-text-body: #CBD5E1;
  --ab-text-muted: #94A3B8;
  --ab-text-subtle: #64748B;

  --ab-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --ab-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --ab-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
}

/* ================== TOÀN CỤC TRANG GIỚI THIỆU ================== */
.about-page-main {
  background-color: var(--ab-bg);
  color: var(--ab-text-body);
  font-family: var(--ab-font-body);
  padding-top: 3.5rem;
  padding-bottom: 5rem;
  min-height: 80vh;
}

@media (min-width: 1024px) {
  .about-page-main {
    /* Đảm bảo khoảng cách an toàn với navbar 2 tầng cố định (176px) */
    padding-top: 4.75rem;
  }
}

/* ================== BREADCRUMBS ================== */
.about-breadcrumb-nav {
  margin-bottom: 2rem;
  padding: 0.25rem 0;
}

.about-breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.9rem;
}

.about-breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ab-text-muted);
}

.about-breadcrumb-item + .about-breadcrumb-item::before {
  content: "/";
  color: var(--ab-text-subtle);
  font-size: 0.85rem;
}

.about-breadcrumb-link {
  color: var(--ab-text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s ease;
}

.about-breadcrumb-link:hover {
  color: var(--ab-primary);
}

.about-breadcrumb-curr {
  color: var(--ab-text-heading);
  font-weight: 600;
}

/* Highlight thương hiệu Hati Solutions */
.about-brand-highlight {
  color: var(--ab-primary);
  font-weight: 800;
  white-space: nowrap;
  display: inline-block;
}

/* ================== SECTION 1: HERO & TỔNG QUAN DOANH NGHIỆP ================== */
.about-hero-section {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  padding: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 3.5rem;
  box-shadow: var(--ab-shadow-md);
  position: relative;
  overflow: hidden;
}

.about-hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--ab-primary);
}

.about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .about-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2.5rem;
    align-items: stretch;
  }
}

.about-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about-hero-badge-wrap {
  margin-bottom: 1rem;
}

.about-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--ab-radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--ab-primary-light);
  color: var(--ab-primary);
  border: 1px solid rgba(211, 47, 47, 0.15);
}

.about-hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--ab-primary);
  display: inline-block;
  animation: pulse-dot 1.8s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

/* ĐÚNG 1 THẺ H1 TRÊN TOÀN BỘ TRANG GIỚI THIỆU */
.about-hero-title,
.about-hero-copy h1 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.35rem, 2.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ab-text-heading);
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
}

.about-hero-title-highlight {
  color: var(--ab-primary);
}

.about-hero-lead {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ab-text-heading);
  margin-bottom: 0.85rem;
}

.about-hero-desc {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ab-text-body);
  margin-bottom: 0.85rem;
}

.about-hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--ab-card-border);
}

/* Các nút bấm có border-radius <= 12px theo yêu cầu người dùng */
.about-btn-primary {
  background: var(--ab-primary);
  color: #FFFFFF;
  padding: 0.8rem 1.65rem;
  border-radius: var(--ab-radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  box-shadow: 0 4px 14px var(--ab-primary-glow);
  transition: all 0.25s ease;
  border: none;
}

.about-btn-primary:hover {
  background: var(--ab-primary-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--ab-primary-glow);
}

.about-btn-secondary {
  background: var(--ab-inner-bg);
  color: var(--ab-text-heading);
  padding: 0.8rem 1.5rem;
  border-radius: var(--ab-radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  border: 1px solid var(--ab-card-border);
  transition: all 0.25s ease;
}

.about-btn-secondary:hover {
  background: var(--ab-card-bg);
  border-color: var(--ab-primary);
  color: var(--ab-primary);
  transform: translateY(-2px);
}

.about-hero-visual {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.about-hero-img-box {
  border-radius: var(--ab-radius-md);
  overflow: hidden;
  box-shadow: var(--ab-shadow-sm);
  border: 1px solid var(--ab-card-border);
  aspect-ratio: 16/10;
  margin-bottom: 0.85rem;
}

@media (min-width: 992px) {
  .about-hero-img-box {
    aspect-ratio: auto;
    flex-grow: 1;
    min-height: 330px;
  }
}

.about-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.about-hero-img-box:hover .about-hero-img {
  transform: scale(1.03);
}

.about-hero-stats-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.about-hero-stat-card {
  background: var(--ab-inner-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.about-hero-stat-icon {
  color: var(--ab-primary);
  flex-shrink: 0;
}

.about-hero-stat-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ab-text-heading);
  line-height: 1.3;
}

.about-hero-stat-sub {
  font-size: 0.76rem;
  color: var(--ab-text-muted);
}

@media (max-width: 1024px) {
  .about-hero-stat-sub {
    display: none;
  }
}

.about-section-header {
  text-align: center;
  max-width: 1060px;
  margin: 0 auto 3rem;
}

.about-section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--ab-radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--ab-primary-light);
  color: var(--ab-primary);
  margin-bottom: 0.85rem;
}

/* ĐÚNG 2 THẺ H2 TRÊN TOÀN BỘ TRANG GIỚI THIỆU */
.about-section-h2 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.22rem, 2.6vw, 2rem);
  font-weight: 800;
  line-height: 1.32;
  color: var(--ab-text-heading);
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
}

.about-section-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ab-text-muted);
  margin: 0;
}

.about-services-section {
  margin-bottom: 4.5rem;
}

.about-services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 576px) {
  .about-services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .about-services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.about-service-card {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--ab-shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.about-service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ab-shadow-md);
  border-color: var(--ab-primary);
}

.about-service-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.about-service-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.65rem;
  border-radius: var(--ab-radius-sm);
  background: var(--ab-primary-light);
  color: var(--ab-primary);
}

.about-service-num {
  font-family: var(--ab-font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ab-text-subtle);
  opacity: 0.7;
  transition: color 0.25s ease, opacity 0.25s ease;
}

.about-service-card:hover .about-service-num {
  color: var(--ab-primary);
  opacity: 1;
}

.about-service-title {
  font-family: var(--ab-font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ab-text-heading);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.about-service-desc {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ab-text-muted);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.about-service-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px dashed var(--ab-card-border);
}

.about-service-pill {
  font-size: 0.76rem;
  font-weight: 500;
  padding: 0.22rem 0.6rem;
  border-radius: var(--ab-radius-sm);
  background: var(--ab-inner-bg);
  color: var(--ab-text-body);
}

.about-philosophy-section {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  padding: clamp(2.25rem, 4.5vw, 3.5rem) clamp(1.5rem, 3.5vw, 3rem);
  margin-bottom: 4.5rem;
  box-shadow: var(--ab-shadow-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-philosophy-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--ab-primary);
}

.about-philosophy-quote-mark {
  font-size: 2.2rem;
  line-height: 1;
  color: var(--ab-primary);
  margin-bottom: 0.65rem;
  opacity: 0.8;
}

.about-pillar-h3 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.1rem, 2.6vw, 1.95rem);
  font-weight: 800;
  color: var(--ab-primary);
  line-height: 1.35;
  margin-bottom: 1.15rem;
  letter-spacing: -0.01em;
}

.about-philosophy-body {
  max-width: 820px;
  margin: 0 auto 2rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--ab-text-body);
}

.about-commitments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  max-width: 960px;
  margin: 0 auto;
  text-align: left;
}

.about-commitment-item {
  background: var(--ab-inner-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-md);
  padding: 1.15rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.about-commitment-icon {
  color: var(--ab-primary);
  flex-shrink: 0;
}

.about-commitment-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ab-text-heading);
  margin-bottom: 0.15rem;
}

.about-commitment-sub {
  font-size: 0.8rem;
  color: var(--ab-text-muted);
}

/* ================== SECTION 4: 5 LÝ DO CHỌN HATI (H2 #2) ================== */
.about-differentiators-section {
  margin-bottom: 4.5rem;
}

/* Tiêu đề căn trái theo yêu cầu người dùng */
.about-diff-header {
  text-align: left;
  margin-bottom: 2.25rem;
}

.about-diff-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-diff-visual {
  width: 100%;
}

.about-diff-img-wrap {
  border-radius: var(--ab-radius-lg);
  overflow: hidden;
  box-shadow: var(--ab-shadow-md);
  border: 1px solid var(--ab-card-border);
  position: relative;
  aspect-ratio: 4 / 3;
  width: 100%;
}

.about-diff-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-diff-img-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.85) 100%);
  color: #FFFFFF;
}

@media (min-width: 992px) {
  .about-diff-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 2.25rem;
    align-items: stretch;
  }

  .about-diff-visual {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 0;
  }

  .about-diff-img-wrap {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 0;
    aspect-ratio: auto;
  }
}

.about-diff-img-badge {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FCA5A5;
  margin-bottom: 0.25rem;
}

.about-diff-img-text {
  font-size: 0.92rem;
  font-weight: 600;
  color: #FFFFFF;
  margin: 0;
}

.about-diff-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.about-diff-item {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-md);
  padding: 0.8rem 1.15rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  box-shadow: var(--ab-shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.about-diff-item:hover {
  transform: translateX(4px);
  border-color: var(--ab-primary);
}

.about-diff-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ab-primary-light);
  color: var(--ab-primary);
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.about-diff-content {
  flex-grow: 1;
}

.about-diff-title {
  font-family: var(--ab-font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ab-text-heading);
  margin-bottom: 0.2rem;
}

.about-diff-desc {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ab-text-muted);
  margin: 0;
}

/* ================== SECTION 5: QUY TRÌNH TRIỂN KHAI (H3 #2) ================== */
.about-process-section {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  padding: clamp(2.25rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: 4.5rem;
  box-shadow: var(--ab-shadow-md);
  position: relative;
  overflow: hidden;
}

.about-process-section .about-section-header,
.about-network-section .about-section-header {
  margin-bottom: 1.5rem;
}

.about-process-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--ab-primary);
}

/* THẺ H3 #2 TRÊN TOÀN TRANG */
.about-process-h3 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  font-weight: 800;
  color: var(--ab-text-heading);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.about-process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.25rem;
}

@media (min-width: 576px) {
  .about-process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .about-process-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Card quy trình có icon chìm về nền ở góc phải theo yêu cầu người dùng */
.about-step-card {
  background: var(--ab-inner-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-md);
  padding: 1.65rem 1.4rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

.about-step-card:hover {
  transform: translateY(-4px);
  border-color: var(--ab-primary);
}

/* Icon chìm ở nền góc phải TRÊN */
.about-step-bg-icon {
  position: absolute;
  top: 8px;
  right: 10px;
  bottom: auto;
  color: var(--ab-primary);
  opacity: 0.08;
  pointer-events: none;
  z-index: 1;
  transition: all 0.3s ease;
}

.about-step-card:hover .about-step-bg-icon {
  opacity: 0.16;
  transform: scale(1.08);
}

.about-step-card-content {
  position: relative;
  z-index: 2;
}

.about-step-num {
  font-family: var(--ab-font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ab-primary);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.about-step-title {
  font-family: var(--ab-font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ab-text-heading);
  margin-bottom: 0.45rem;
  line-height: 1.35;
}

.about-step-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ab-text-muted);
  margin: 0;
}

/* ================== SECTION 6: MẠNG LƯỚI VĂN PHÒNG & LIÊN HỆ (H3 #3) ================== */
.about-network-section {
  margin-bottom: 4.5rem;
}

/* THẺ H3 #3 TRÊN TOÀN TRANG */
.about-contact-h3 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  font-weight: 800;
  color: var(--ab-text-heading);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.about-office-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .about-office-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.about-office-card {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  padding: 1.85rem 1.65rem;
  box-shadow: var(--ab-shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.about-office-card:hover {
  transform: translateY(-3px);
  border-color: var(--ab-primary);
}

.about-office-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--ab-radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--ab-primary-light);
  color: var(--ab-primary);
  margin-bottom: 1rem;
}

.about-office-name {
  font-family: var(--ab-font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ab-text-heading);
  margin-bottom: 1rem;
}

.about-office-info-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about-office-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--ab-text-body);
}

.about-office-info-icon {
  color: var(--ab-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.about-office-link {
  color: var(--ab-text-heading);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s ease;
}

.about-office-link:hover {
  color: var(--ab-primary);
}

/* ================== SECTION 7: SWIPER BÀI VIẾT / CẨM NANG (H3 #4) ================== */
/* Đồng bộ 100% phong cách với list tin tức ở trang tuyển dụng */
.about-blog-section {
  border-top: 1px solid var(--ab-card-border);
  padding-top: 3.5rem;
}

.about-blog-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

/* THẺ H3 #4 TRÊN TOÀN TRANG */
.about-blog-h3 {
  font-family: var(--ab-font-heading);
  font-size: clamp(1.3rem, 2.3vw, 1.75rem);
  font-weight: 800;
  color: var(--ab-text-heading);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-blog-h3-icon {
  color: var(--ab-primary);
  flex-shrink: 0;
}

.about-blog-sub {
  font-size: 0.92rem;
  color: var(--ab-text-muted);
  margin: 0;
}

.about-swiper-nav-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Nút bấm Swiper có border-radius <= 12px */
.about-swiper-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--ab-radius-btn);
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  color: var(--ab-text-body);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.about-swiper-btn:hover {
  background: var(--ab-primary);
  color: #FFFFFF;
  border-color: var(--ab-primary);
  transform: scale(1.05);
}

.about-blog-swiper {
  padding: 12px 6px 16px;
  margin: -12px -6px -16px;
}

.about-blog-card {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-card-border);
  border-radius: var(--ab-radius-lg);
  overflow: hidden;
  box-shadow: var(--ab-shadow-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.about-blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ab-shadow-md);
  border-color: var(--ab-primary);
}

.about-blog-thumb {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  display: block;
}

.about-blog-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.about-blog-card:hover .about-blog-img {
  transform: scale(1.06);
}

.about-blog-body {
  padding: 1.25rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* Meta ngày đăng & badge danh mục nằm cùng hàng như trang tuyển dụng */
.about-blog-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
  font-size: 0.82rem;
  color: var(--ab-text-muted);
}

.about-blog-date {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.about-blog-meta-icon {
  color: var(--ab-primary);
  flex-shrink: 0;
}

.about-blog-cat-badge {
  background: var(--ab-primary-light);
  color: var(--ab-primary);
  padding: 0.2rem 0.55rem;
  border-radius: var(--ab-radius-sm);
  font-weight: 600;
  font-size: 0.76rem;
}

.about-blog-title {
  font-family: var(--ab-font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 0.65rem;
}

.about-blog-link {
  color: var(--ab-text-heading);
  text-decoration: none;
  transition: color 0.2s ease;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.about-blog-link:hover {
  color: var(--ab-primary);
}

.about-blog-excerpt {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ab-text-muted);
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.about-blog-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ab-primary);
  text-decoration: none;
  transition: gap 0.2s ease;
}

.about-blog-btn:hover {
  gap: 0.65rem;
}

.about-swiper-pagination {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 6px;
}

.about-swiper-pagination .swiper-pagination-bullet {
  width: 8px;
  height: 8px;
  background: var(--ab-card-border);
  opacity: 1;
  transition: all 0.25s ease;
  border-radius: var(--ab-radius-sm);
}

.about-swiper-pagination .swiper-pagination-bullet-active {
  width: 22px;
  background: var(--ab-primary);
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS (HIỆU ỨNG CUỘN ĐẾN & CUỘN QUA)
   ========================================================================== */

/* 1. Hero Section */
.about-hero-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-hero-section.is-in-view {
  opacity: 1;
  transform: translateY(0);
}

.about-hero-section.is-out-view {
  opacity: 0;
  transform: translateY(-20px);
}

/* 2. Services Section: Header & 6 Service Cards */
.about-services-section .about-section-header {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-services-section .about-service-card {
  opacity: 0;
  transform: translateY(36px) scale(0.98);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s ease,
              border-color 0.25s ease;
  will-change: opacity, transform;
}

.about-services-section .about-service-card:nth-child(1) { transition-delay: 0.05s; }
.about-services-section .about-service-card:nth-child(2) { transition-delay: 0.12s; }
.about-services-section .about-service-card:nth-child(3) { transition-delay: 0.19s; }
.about-services-section .about-service-card:nth-child(4) { transition-delay: 0.26s; }
.about-services-section .about-service-card:nth-child(5) { transition-delay: 0.33s; }
.about-services-section .about-service-card:nth-child(6) { transition-delay: 0.40s; }

.about-services-section.is-in-view .about-section-header {
  opacity: 1;
  transform: translateY(0);
}

.about-services-section.is-in-view .about-service-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.about-services-section.is-in-view .about-service-card:hover {
  transform: translateY(-4px) scale(1);
}

.about-services-section.is-out-view .about-section-header {
  opacity: 0;
  transform: translateY(-20px);
}

.about-services-section.is-out-view .about-service-card {
  opacity: 0;
  transform: translateY(24px) scale(0.98);
}

/* 3. Philosophy Section */
.about-philosophy-section {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-philosophy-section.is-in-view {
  opacity: 1;
  transform: translateY(0);
}

.about-philosophy-section.is-out-view {
  opacity: 0;
  transform: translateY(-20px);
}

/* 4. Differentiators Section: Visual + 5 Items */
.about-differentiators-section .about-diff-header {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-differentiators-section .about-diff-visual {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s,
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s;
  will-change: opacity, transform;
}

.about-differentiators-section .about-diff-item {
  opacity: 0;
  transform: translateX(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.2s ease;
  will-change: opacity, transform;
}

.about-differentiators-section .about-diff-item:nth-child(1) { transition-delay: 0.08s; }
.about-differentiators-section .about-diff-item:nth-child(2) { transition-delay: 0.16s; }
.about-differentiators-section .about-diff-item:nth-child(3) { transition-delay: 0.24s; }
.about-differentiators-section .about-diff-item:nth-child(4) { transition-delay: 0.32s; }
.about-differentiators-section .about-diff-item:nth-child(5) { transition-delay: 0.40s; }

.about-differentiators-section.is-in-view .about-diff-header {
  opacity: 1;
  transform: translateY(0);
}

.about-differentiators-section.is-in-view .about-diff-visual {
  opacity: 1;
  transform: translateY(0);
}

.about-differentiators-section.is-in-view .about-diff-item {
  opacity: 1;
  transform: translateX(0);
}

.about-differentiators-section.is-in-view .about-diff-item:hover {
  transform: translateX(4px);
}

.about-differentiators-section.is-out-view .about-diff-header,
.about-differentiators-section.is-out-view .about-diff-visual,
.about-differentiators-section.is-out-view .about-diff-item {
  opacity: 0;
  transform: translateY(20px);
}

/* 5. Process Section: 4 Step Cards */
.about-process-section .about-section-header {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-process-section .about-step-card {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.25s ease;
  will-change: opacity, transform;
}

.about-process-section .about-step-card:nth-child(1) { transition-delay: 0.08s; }
.about-process-section .about-step-card:nth-child(2) { transition-delay: 0.16s; }
.about-process-section .about-step-card:nth-child(3) { transition-delay: 0.24s; }
.about-process-section .about-step-card:nth-child(4) { transition-delay: 0.32s; }

.about-process-section.is-in-view .about-section-header {
  opacity: 1;
  transform: translateY(0);
}

.about-process-section.is-in-view .about-step-card {
  opacity: 1;
  transform: translateY(0);
}

.about-process-section.is-in-view .about-step-card:hover {
  transform: translateY(-4px);
}

.about-process-section.is-out-view .about-section-header,
.about-process-section.is-out-view .about-step-card {
  opacity: 0;
  transform: translateY(24px);
}

/* 6. Network Section: 2 Office Cards */
.about-network-section .about-section-header {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-network-section .about-office-card {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.2s ease;
  will-change: opacity, transform;
}

.about-network-section .about-office-card:nth-child(1) { transition-delay: 0.08s; }
.about-network-section .about-office-card:nth-child(2) { transition-delay: 0.20s; }

.about-network-section.is-in-view .about-section-header,
.about-network-section.is-in-view .about-office-card {
  opacity: 1;
  transform: translateY(0);
}

.about-network-section.is-in-view .about-office-card:hover {
  transform: translateY(-3px);
}

.about-network-section.is-out-view .about-section-header,
.about-network-section.is-out-view .about-office-card {
  opacity: 0;
  transform: translateY(20px);
}

/* 7. Blog Section: Top & Swiper */
.about-blog-section .about-blog-top,
.about-blog-section .about-blog-swiper {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.about-blog-section.is-in-view .about-blog-top,
.about-blog-section.is-in-view .about-blog-swiper {
  opacity: 1;
  transform: translateY(0);
}

.about-blog-section.is-out-view .about-blog-top,
.about-blog-section.is-out-view .about-blog-swiper {
  opacity: 0;
  transform: translateY(24px);
}

@media (max-width: 768px) {
  .about-hero-title,
  .about-hero-copy h1 {
    font-size: 1.35rem;
    line-height: 1.28;
    margin-bottom: 0.75rem;
  }
  .about-section-h2 {
    font-size: 1.2rem;
    line-height: 1.32;
    margin-bottom: 0.75rem;
  }
  .about-pillar-h3 {
    font-size: 1.1rem;
    line-height: 1.35;
    margin-bottom: 0.85rem;
  }
}

@media (max-width: 480px) {
  .about-hero-title,
  .about-hero-copy h1 {
    font-size: 1.2rem;
    line-height: 1.28;
    margin-bottom: 0.65rem;
  }
  .about-section-h2 {
    font-size: 1.08rem;
    line-height: 1.32;
    margin-bottom: 0.65rem;
  }
  .about-pillar-h3 {
    font-size: 0.98rem;
    line-height: 1.35;
    margin-bottom: 0.75rem;
  }
}