/* ==============================================================================
 * DỰ ÁN: THICONGCOCNHOI.COM - HỆ THỐNG NATIVE PHP MVC CHUẨN CORE WEB VITALS 2026
 * TỆP: assets/css/style.css
 * BẢNG MÀU: Xanh Lá Công Trình (#166534) & Vàng Cam Cơ Giới (#f59e0b)
 * TỐI ƯU: Zero-Bloat, Không Thư Viện Nặng, Đạt 98+ PageSpeed, CLS = 0.000
 * ============================================================================== */

:root {
  --primary-green: #166534;
  --primary-green-dark: #14532d;
  --primary-green-light: #22c55e;
  --accent-gold: #f59e0b;
  --accent-gold-dark: #d97706;
  --accent-orange: #ea580c;
  --dark-slate: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.2s ease-in-out;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-system);
  color: var(--text-main);
  background-color: var(--bg-light);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   TOPBAR
   ========================================================================== */
.topbar {
  background: var(--dark-slate);
  color: #94a3b8;
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 8px 0;
}
.topbar-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.topbar-info {
  display: flex;
  align-items: center;
  gap: 20px;
}
.topbar-info-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.topbar-info-item svg {
  width: 14px;
  height: 14px;
  fill: var(--accent-gold);
}
.topbar-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  animation: pulse-green 1.8s infinite;
}
@keyframes pulse-green {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

/* ==========================================================================
   MAIN HEADER (BEAST-STYLE: NỀN XANH LÁ & ĐIỀU HƯỚNG CÂN ĐỐI)
   ========================================================================== */
.site-header {
  background: var(--primary-green);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
}
.header-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  flex-wrap: nowrap;
  gap: 20px;
  width: 100%;
}

/* Logo Thương Hiệu (Căn giữa hoàn hảo theo chiều rộng thanh header) */
.header-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  padding: 0;
  border-radius: 0;
  height: 100%;
  flex-shrink: 0;
  box-shadow: none;
  text-decoration: none;
}
.brand-logo-text {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Arial Black", Arial, sans-serif;
  font-size: 25px;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: -0.6px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: opacity 0.2s ease;
  margin: 0;
  padding: 0;
  transform: none; /* Căn giữa 100% trục dọc tâm điểm header 70px */
}
.brand-logo-text:hover {
  opacity: 0.92;
}
.brand-domain {
  font-size: 16.5px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.4px;
  margin-left: 2px;
}
.header-logo img, .header-logo svg {
  height: 38px;
  width: auto;
  display: block;
}

/* Menu Chính: Căn Giữa Cân Đối & Rê Chuột Tô Vàng */
.main-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  flex: 1;
  margin: 0 15px;
  min-width: 0;
}
.nav-menu {
  display: flex;
  list-style: none;
  height: 100%;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  padding: 0;
  gap: 2px;
}
.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 100%;
  padding: 0 12px;
  color: #ffffff;
  font-size: 14.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15px;
  white-space: nowrap;
  border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease;
}
/* Rê Chuột Vào Bất Kỳ Menu Nào Đều Tô Vàng Kim Sang Trọng */
.nav-item:hover > .nav-link,
.nav-link:hover {
  background: var(--accent-gold);
  color: #ffffff;
}
.nav-item.has-dropdown:hover > .nav-link {
  background: var(--accent-gold);
  color: #ffffff;
}

/* Khối Active Tab chuẩn mẫu Beast (Vàng Cam) */
.nav-item.active .nav-link,
.nav-link.active {
  background: var(--accent-gold);
  color: #ffffff;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,0.15);
}
.nav-item.active:hover .nav-link {
  background: var(--accent-gold-dark);
}

/* Dropdown Xổ Xuống (Cọc D300, D400, D500, D600) */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: #ffffff;
  border-radius: 0 0 6px 6px;
  box-shadow: var(--shadow-lg);
  border-top: 3px solid var(--accent-gold);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  list-style: none;
  padding: 8px 0;
  z-index: 1001;
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 500;
  border-bottom: 1px solid #f1f5f9;
}
.nav-dropdown-item:last-child a {
  border-bottom: none;
}
.nav-dropdown-item a:hover {
  background: #f8fafc;
  color: var(--primary-green);
  padding-left: 22px;
}
.nav-dropdown-item a::after {
  content: "›";
  font-size: 16px;
  color: #cbd5e1;
  transition: var(--transition);
}
.nav-dropdown-item a:hover::after {
  color: var(--accent-gold);
  transform: translateX(3px);
}

/* Nhóm Hành Động Bên Phải: Hotline Bấm Gọi VÀNG CAM CƠ GIỚI (CTA Số 1) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header-hotline-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #ffffff;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  padding: 8px 15px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  white-space: nowrap;
  text-decoration: none;
  box-shadow: 0 3px 12px rgba(245, 158, 11, 0.35);
  transition: all 0.25s ease;
  flex-shrink: 0;
}
.header-hotline-btn:hover {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  border-color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 5px 16px rgba(217, 119, 6, 0.5);
  color: #ffffff;
}
.header-hotline-btn svg {
  width: 14px;
  height: 14px;
  fill: #ffffff;
  transition: transform 0.2s ease;
}
.header-hotline-btn:hover svg {
  transform: scale(1.15) rotate(12deg);
}
.hotline-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  animation: pulse-green 1.8s infinite;
  flex-shrink: 0;
}
.hotline-number {
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #ffffff;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 24px;
  cursor: pointer;
  padding: 6px;
}

/* ==========================================================================
   HERO BANNER CƠ GIỚI NỀN MÓNG (HÌNH THI CÔNG CỌC THỰC TẾ)
   ========================================================================== */
.hero-banner {
  position: relative;
  background: #0b1523 url('/uploads/images/banner-thi-cong-coc-nhoi.webp') center right / cover no-repeat;
  color: #ffffff;
  padding: 85px 0 95px;
  overflow: hidden;
}
.hero-banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(11, 21, 35, 0.92) 0%, rgba(11, 21, 35, 0.82) 42%, rgba(11, 21, 35, 0.45) 68%, rgba(11, 21, 35, 0.15) 100%);
  z-index: 1;
}
.hero-banner .container {
  position: relative;
  z-index: 2;
}
.hero-banner-content {
  max-width: 960px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.18);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.hero-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  color: #ffffff;
  letter-spacing: -0.5px;
}
.hero-title span {
  color: var(--accent-gold);
}
.hero-subtitle {
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: 0.8px;
  color: #fef08a;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.hero-desc {
  font-size: 16px;
  color: #cbd5e1;
  margin-bottom: 28px;
  line-height: 1.65;
  max-width: 820px;
}
.hero-key-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 30px 0 34px;
}
.hero-metric-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 12px 14px;
  border-radius: 8px;
  backdrop-filter: blur(4px);
}
.hero-metric-icon {
  font-size: 24px;
  line-height: 1;
}
.hero-metric-text strong {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: #ffffff;
}
.hero-metric-text span {
  display: block;
  font-size: 11.5px;
  color: #cbd5e1;
  margin-top: 2px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}
.hero-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-gold);
  color: #ffffff;
  padding: 14px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
  transition: var(--transition);
  text-decoration: none;
}
.hero-btn-primary:hover {
  background: var(--accent-gold-dark);
  transform: translateY(-2px);
}
.hero-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-green);
  color: #ffffff;
  padding: 14px 22px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 15px rgba(22, 101, 52, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
  text-decoration: none;
}
.hero-btn-secondary:hover {
  background: var(--primary-green-dark);
  transform: translateY(-2px);
}
.hero-btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  padding: 14px 20px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
  text-decoration: none;
}
.hero-btn-outline:hover {
  background: rgba(255, 255, 255, 0.25);
}
.quote-form-group {
  margin-bottom: 14px;
}
.quote-form-label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 4px;
  color: #334155;
}
.quote-form-control {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
}
.quote-form-control:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(22, 101, 52, 0.15);
}
.quote-btn-submit {
  width: 100%;
  height: 48px;
  background: var(--accent-gold);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
  margin-top: 6px;
}
.quote-btn-submit:hover {
  background: var(--accent-gold-dark);
}
.quote-security-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* ==========================================================================
   KHỐI 4 DỊCH VỤ TRỌNG TÂM (D300, D400, D500, D600)
   ========================================================================== */
.section {
  padding: 70px 0;
}
.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px;
}
.section-badge {
  display: inline-block;
  color: var(--primary-green);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-desc {
  font-size: 16px;
  color: var(--text-muted);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: #ffffff;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-green);
}
.service-card-header {
  background: var(--primary-green);
  color: #ffffff;
  padding: 16px 18px;
  position: relative;
}
.service-card-header h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}
.service-card-header .diameter-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--accent-gold);
  color: #ffffff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.service-card-body {
  padding: 20px 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.service-specs {
  list-style: none;
  margin-bottom: 18px;
  font-size: 13.5px;
}
.service-spec-item {
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px dashed #e2e8f0;
}
.service-spec-item .label {
  color: var(--text-muted);
}
.service-spec-item .val {
  font-weight: 700;
  color: var(--dark-slate);
}
.service-summary {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
}
.service-articles-heading {
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--primary-green);
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 4px;
}
.service-articles-list {
  list-style: none;
  font-size: 13px;
  margin-bottom: 18px;
}
.service-articles-list li {
  margin-bottom: 6px;
}
.service-articles-list li a {
  color: #334155;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.service-articles-list li a:hover {
  color: var(--accent-gold);
  padding-left: 4px;
}
.service-card-btn {
  display: block;
  text-align: center;
  background: #f1f5f9;
  color: var(--primary-green);
  font-size: 13.5px;
  font-weight: 700;
  padding: 10px;
  border-radius: 4px;
  transition: var(--transition);
}
.service-card-btn:hover {
  background: var(--primary-green);
  color: #ffffff;
}

/* ==========================================================================
   DANH SÁCH BÀI VIẾT KỸ THUẬT THEO TỪNG LOẠI CỌC D300 - D600 (BỐ CỤC 4 BÀI HIỆN ĐẠI)
   ========================================================================== */
.piles-services-section {
  padding: 60px 0 30px;
  background: #f8fafc;
}
.pile-category-block {
  margin-bottom: 55px;
}
.pile-category-header {
  text-align: center;
  margin-bottom: 28px;
}
.pile-category-badge {
  display: inline-block;
  color: var(--primary-green);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: rgba(22, 101, 52, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 8px;
}
.pile-category-title {
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--dark-slate);
  letter-spacing: -0.5px;
  margin: 0 0 8px 0;
}
.pile-category-title a {
  color: var(--dark-slate);
  text-decoration: none;
  transition: color 0.2s ease;
}
.pile-category-title a:hover {
  color: var(--primary-green);
}
.pile-category-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.pile-spec-card {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 13.5px;
  color: #475569;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.pile-spec-card strong {
  color: #0f172a;
  font-weight: 700;
}
.pile-spec-card .spec-price {
  color: #d97706;
  font-weight: 700;
}
.pile-spec-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  color: var(--primary-green);
  border: 1.5px solid var(--primary-green);
  border-radius: 6px;
  padding: 7px 16px;
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(22, 101, 52, 0.08);
}
.pile-spec-btn:hover {
  background: var(--primary-green);
  color: #ffffff;
}
.piles-cards-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* THIẾT KẾ THẺ BÀI VIẾT HIỆN ĐẠI & SANG TRỌNG (MODERN CONSTRUCTION CARD) */
.modern-article-card {
  background: #ffffff;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  overflow: hidden;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.04);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}
.modern-article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(22, 101, 52, 0.12);
  border-color: var(--primary-green);
}
.modern-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #e2e8f0;
}
.modern-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}
.modern-article-card:hover .modern-card-thumb img {
  transform: scale(1.08);
}
.modern-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(22, 101, 52, 0.92);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  backdrop-filter: blur(4px);
}
.modern-card-body {
  padding: 18px 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.modern-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark-slate);
  line-height: 1.45;
  margin: 0 0 8px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}
.modern-article-card:hover .modern-card-title {
  color: var(--primary-green);
}
.modern-card-excerpt {
  font-size: 13px;
  color: #64748b;
  line-height: 1.55;
  margin: 0 0 16px 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.modern-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #f1f5f9;
  padding-top: 12px;
}
.modern-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-green);
  transition: gap 0.2s ease;
}
.modern-article-card:hover .modern-card-link {
  color: var(--accent-gold);
  gap: 10px;
}

@media (max-width: 1024px) {
  .piles-cards-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}
@media (max-width: 640px) {
  .piles-cards-row {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .pile-category-title {
    font-size: 22px;
  }
}

/* ==========================================================================
   KHỐI TIẾP NHẬN BÁO GIÁ & CÂU HỎI THƯỜNG GẶP (2 CỘT CÂN ĐỐI)
   ========================================================================== */
.quote-faq-section {
  background: linear-gradient(135deg, #166534 0%, #14532d 100%);
  color: #ffffff;
  padding: 65px 0;
}
.quote-faq-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 45px;
  align-items: start;
}
.faq-block-head {
  margin-bottom: 24px;
}
.faq-badge {
  color: var(--accent-gold);
  font-weight: 600;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  display: inline-block;
  margin-bottom: 6px;
}
.faq-main-title {
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 10px;
  line-height: 1.3;
}
.faq-intro {
  font-size: 14.5px;
  color: #cbd5e1;
  line-height: 1.6;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 16px 18px;
  backdrop-filter: blur(4px);
  transition: background 0.2s ease;
}
.faq-item:hover {
  background: rgba(255, 255, 255, 0.12);
}
.faq-question {
  font-size: 14.5px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.faq-question-icon {
  color: var(--accent-gold);
  font-size: 16px;
  line-height: 1.2;
}
.faq-answer {
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.6;
  margin: 0;
  padding-left: 24px;
}
.faq-hotline-note {
  margin-top: 24px;
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  border-left: 4px solid var(--accent-gold);
  font-size: 13.5px;
  color: #e2e8f0;
}
.faq-hotline-note a {
  color: var(--accent-gold);
  font-weight: 700;
  text-decoration: underline;
}

/* Card Form Báo Giá Nhỏ Gọn (Compact Quote Card) */
.compact-quote-box {
  background: #ffffff;
  border-radius: 12px;
  padding: 28px 24px;
  box-shadow: var(--shadow-lg);
  color: var(--text-main);
  border-top: 5px solid var(--accent-gold);
}
.compact-quote-header {
  text-align: center;
  margin-bottom: 20px;
}
.compact-quote-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 4px;
  text-transform: uppercase;
}
.compact-quote-header p {
  font-size: 13px;
  color: var(--text-muted);
}
@media (max-width: 900px) {
  .quote-faq-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ==========================================================================
   BẢNG SỐ LIỆU & QUY TRÌNH THI CÔNG (CHUẨN AEO)
   ========================================================================== */
.stats-strip {
  background: var(--dark-slate);
  color: #ffffff;
  padding: 45px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: var(--accent-gold);
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: #94a3b8;
  font-weight: 600;
  text-transform: uppercase;
}

/* Quy Trình 6 Bước Chuẩn TCVN */
.workflow-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: workflow-counter;
}
.workflow-card {
  background: #ffffff;
  border-radius: 8px;
  padding: 24px 20px;
  border: 1px solid var(--border-color);
  position: relative;
  counter-increment: workflow-counter;
  box-shadow: var(--shadow-sm);
}
.workflow-card::before {
  content: counter(workflow-counter, decimal-leading-zero);
  position: absolute;
  top: -15px;
  left: 20px;
  background: var(--accent-gold);
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 3px 8px rgba(245, 158, 11, 0.4);
}
.workflow-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-slate);
  margin-top: 10px;
  margin-bottom: 8px;
}
.workflow-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Bảng Dự Toán Tham Khảo Chuẩn Table/Thead cho Google AI Overview */
.pricing-table-wrap {
  overflow-x: auto;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-top: 30px;
}
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14.5px;
}
.pricing-table thead {
  background: var(--primary-green);
  color: #ffffff;
}
.pricing-table th, .pricing-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}
.pricing-table th {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.pricing-table tbody tr:hover {
  background: #f8fafc;
}
.pricing-table td.price {
  color: var(--accent-orange);
  font-weight: 700;
}

/* ==========================================================================
   DỰ ÁN THỰC TẾ & BÀI VIẾT KỸ THUẬT
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.project-card {
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
  border-color: #cbd5e1;
}
.project-card-thumb {
  height: 190px;
  background: #cbd5e1;
  overflow: hidden;
  position: relative;
  display: block;
}
.project-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover .project-card-thumb img {
  transform: scale(1.07);
}
.project-card-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.project-meta-tag {
  display: inline-block;
  align-self: flex-start;
  background: rgba(22, 101, 52, 0.1);
  color: var(--primary-green);
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}
.project-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--dark-slate);
}
.project-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
.project-card:hover .project-title a {
  color: var(--primary-green);
}
.project-specs {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 12px;
}
.project-view-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--primary-green);
  margin-top: auto;
  text-decoration: none;
  transition: gap 0.2s ease;
}
.project-card:hover .project-view-more {
  color: var(--accent-gold);
  gap: 8px;
}

/* ==========================================================================
   GIAO DIỆN TRANG CHI TIẾT DỰ ÁN (PROJECT DETAIL VIEW)
   ========================================================================== */
.project-detail-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}
.project-detail-spec-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 14px 16px;
  text-align: left;
}
.project-detail-spec-card .spec-label {
  display: block;
  font-size: 12px;
  color: #64748b;
  font-weight: 600;
  margin-bottom: 4px;
}
.project-detail-spec-card .spec-value {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--dark-slate);
}
.project-featured-img-wrap {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 28px;
  border: 1px solid #e2e8f0;
  box-shadow: var(--shadow-sm);
  max-height: 480px;
}
.project-featured-img-wrap img {
  width: 100%;
  height: 100%;
  max-height: 480px;
  object-fit: cover;
}
.project-summary-box {
  background: #f0fdf4;
  border-left: 4px solid var(--primary-green);
  padding: 18px 22px;
  border-radius: 0 8px 8px 0;
  margin-bottom: 28px;
  font-size: 15.5px;
  line-height: 1.7;
  color: #166534;
  font-weight: 500;
}
.project-content-body {
  font-size: 15.5px;
  line-height: 1.75;
  color: #334155;
}
.project-content-body h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--dark-slate);
  margin: 28px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid #f1f5f9;
}
.project-content-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-slate);
  margin: 22px 0 10px;
}
.project-content-body p {
  margin-bottom: 16px;
}
.project-content-body img {
  border-radius: 8px;
  margin: 18px auto;
  box-shadow: var(--shadow-sm);
}
.project-content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14.5px;
}
.project-content-body th, .project-content-body td {
  padding: 11px 14px;
  border: 1px solid #e2e8f0;
  text-align: left;
}
.project-content-body th {
  background: #f8fafc;
  font-weight: 700;
  color: var(--dark-slate);
}
@media (max-width: 768px) {
  .project-detail-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   FOOTER SEMANTIC (MÀU XÁM NHẠT SANG TRỌNG) & NÚT GỌI MOBILE
   ========================================================================== */
.site-footer {
  background: #b8c4ce;
  color: #1e293b;
  padding: 60px 0 24px;
  border-top: 4px solid var(--primary-green);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.3fr 1.1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: #0f172a;
  font-size: 15.5px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
  letter-spacing: 0.3px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 35px;
  height: 3px;
  background: var(--primary-green);
  border-radius: 2px;
}
.footer-col p {
  color: #1e293b;
}
.footer-links {
  list-style: none;
  font-size: 13.5px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links li a {
  color: #1e293b;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-block;
}
.footer-links li a:hover {
  color: var(--primary-green);
  font-weight: 700;
  padding-left: 5px;
}
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13.5px;
  color: #1e293b;
}
.footer-contact-item svg {
  width: 16px;
  height: 16px;
  fill: var(--primary-green);
  flex-shrink: 0;
  margin-top: 3px;
}
/* Khối Hotline Kỹ Sư Footer - Đồng bộ màu Vàng Cam Cơ Giới với Header */
.footer-hotline-card {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 16px;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  color: #ffffff;
}
.footer-hotline-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217, 119, 6, 0.5);
}
.footer-hotline-label {
  font-size: 13px;
  color: #ffffff !important;
  margin: 0 0 6px 0;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.footer-hotline-num {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff !important;
  display: inline-flex;
  align-items: center;
  margin-bottom: 6px;
  text-decoration: none;
  letter-spacing: 0.5px;
  line-height: 1.2;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: opacity 0.2s ease;
}
.footer-hotline-num:hover {
  color: #ffffff !important;
  opacity: 0.95;
  text-decoration: underline;
}
.footer-hotline-status {
  font-size: 12px;
  color: #ffffff !important;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.footer-bottom {
  border-top: 1px solid rgba(15, 23, 42, 0.15);
  padding-top: 22px;
  text-align: center;
  font-size: 13px;
  color: #334155;
}

/* Nút Gọi & Zalo Ghim Màn Hình Di Động (Tiêu chí 21) */
.mobile-fixed-cta {
  position: fixed;
  bottom: 15px;
  left: 15px;
  right: 15px;
  display: none;
  z-index: 9999;
  gap: 10px;
}
.mobile-cta-btn {
  flex: 1;
  height: 48px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.mobile-cta-btn.call {
  background: var(--accent-gold);
}
.mobile-cta-btn.zalo {
  background: #0284c7;
}

/* Luxury Modal Báo Giá Thành Công (Tiêu chí 19) */
.luxury-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(4px);
}
.luxury-modal {
  background: #ffffff;
  max-width: 480px;
  width: 90%;
  border-radius: 12px;
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 20px 45px rgba(0,0,0,0.3);
  position: relative;
  animation: modalPop 0.3s ease-out;
}
@keyframes modalPop {
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.luxury-modal-icon {
  width: 64px;
  height: 64px;
  background: #dcfce7;
  color: #166534;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 32px;
}
.luxury-modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 8px;
}
.luxury-modal-msg {
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}
.luxury-modal-actions {
  display: flex;
  gap: 10px;
}
.luxury-modal-actions a {
  flex: 1;
  padding: 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
}
.luxury-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: #94a3b8;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1200px) and (min-width: 769px) {
  .header-wrapper {
    gap: 12px;
  }
  .nav-link {
    padding: 0 8px;
    font-size: 12px;
    gap: 3px;
  }
  .brand-logo-text {
    font-size: 22px;
  }
  .brand-domain {
    font-size: 14.5px;
  }
  .header-hotline-btn {
    padding: 8px 12px;
    font-size: 12.5px;
    gap: 6px;
  }
}

@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-banner-overlay {
    background: linear-gradient(180deg, rgba(11, 21, 35, 0.93) 0%, rgba(11, 21, 35, 0.88) 100%);
  }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  
  /* Lớp ẩn hiện linh hoạt cho Desktop / Mobile */
  .desktop-only { display: flex !important; }
  .mobile-only { display: none !important; }

  .main-navigation {
    position: fixed;
    top: 66px;
    left: 0;
    width: 100%;
    background: linear-gradient(180deg, #0d5c3a 0%, #064e3b 100%);
    border-radius: 0 0 18px 18px;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    border-bottom: 2px solid var(--accent-gold);
    height: auto;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    display: none;
    flex-direction: column;
    padding: 14px 16px 20px;
    z-index: 9999;
  }
  .main-navigation.open {
    display: flex;
  }
  .nav-menu {
    flex-direction: column;
    width: 100%;
    height: auto;
    gap: 4px;
  }
  .nav-item {
    width: 100%;
    height: auto;
    flex-direction: column;
    align-items: stretch;
  }
  .nav-link {
    width: 100%;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    padding: 13px 16px;
    font-size: 14.5px;
    font-weight: 600;
    border-radius: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.2s ease, color 0.2s ease;
  }
  .nav-link:hover, .nav-link:active {
    background: rgba(255, 255, 255, 0.1);
  }
  .nav-item.active .nav-link {
    background: var(--accent-gold);
    color: #ffffff;
  }
  .nav-link .nav-arrow {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    transition: transform 0.2s ease;
  }
  .nav-item.open .nav-arrow {
    transform: rotate(180deg);
  }

  /* Submenu accordion trên mobile */
  .mobile-submenu {
    display: none;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    margin: 4px 0 8px;
    padding: 6px 0;
    list-style: none;
  }
  .nav-item.open .mobile-submenu {
    display: block;
  }
  .mobile-submenu-item a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 18px 10px 24px;
    color: #e2e8f0;
    font-size: 13.5px;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.2s;
  }
  .mobile-submenu-item:last-child a {
    border-bottom: none;
  }
  .mobile-submenu-item a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
    padding-left: 28px;
  }

  /* Hotline ở đáy menu mobile */
  .mobile-nav-cta {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }
  .mobile-nav-hotline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent-gold);
    color: #ffffff;
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14.5px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
  }

  .mobile-nav-toggle {
    display: block;
  }
  .header-hotline-btn {
    display: none;
  }
  .mobile-fixed-cta {
    display: flex;
  }
  body {
    padding-bottom: 75px;
  }

  /* Lưới 4 chỉ số Hero thành 2x2 trên mobile */
  .hero-key-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0 24px;
  }
  .hero-metric-item {
    padding: 10px 12px;
    gap: 8px;
  }
  .hero-metric-icon {
    font-size: 20px;
  }
  .hero-metric-text strong {
    font-size: 13px;
  }
  .hero-metric-text span {
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  .brand-logo-text {
    font-size: 23px;
    letter-spacing: -0.8px;
  }
  .brand-domain {
    font-size: 15px;
  }
}

/* ==========================================================================
   HERO BANNER ĐỒNG BỘ TOÀN SITE (MÀU XÁM NHẠT CAO GẤP 3 LẦN: CHUYÊN MỤC, GIỚI THIỆU, LIÊN HỆ, DỰ ÁN)
   ========================================================================== */
.subpage-hero-banner {
  background: #f8fafc;
  padding: 38px 0 42px;
  border-bottom: 1px solid #e2e8f0;
  position: relative;
}
.subpage-hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}
.subpage-breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: #64748b;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.subpage-breadcrumb-nav a {
  color: var(--primary-green);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
}
.subpage-breadcrumb-nav a:hover {
  color: var(--accent-gold);
}
.subpage-breadcrumb-nav .bc-sep {
  color: #94a3b8;
  font-weight: 400;
  user-select: none;
}
.subpage-breadcrumb-nav .bc-current {
  color: #1e293b;
  font-weight: 700;
}
.subpage-hero-title {
  font-size: 32px;
  font-weight: 700;
  color: #0f172a;
  text-transform: uppercase;
  margin: 0 0 10px 0;
  line-height: 1.25;
  letter-spacing: -0.5px;
}
.subpage-hero-desc {
  font-size: 15px;
  line-height: 1.6;
  color: #475569;
  max-width: 980px;
  margin: 0;
}

.category-archive-section {
  padding: 36px 0 70px;
  background: #f8fafc;
}
.category-archive-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 36px;
  align-items: start;
}
.category-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.category-spec-pill {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 10px 14px;
}
.category-spec-pill span {
  display: block;
  font-size: 11px;
  color: #64748b;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: 0.3px;
}
.category-spec-pill strong {
  display: block;
  font-size: 14.5px;
  color: var(--dark-slate);
  font-weight: 700;
}

/* Lưới bài viết chuyên môn 3 cột */
.category-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  row-gap: 32px;
}
.category-article-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  border: 1px solid #e2e8f0;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.category-article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
  border-color: #cbd5e1;
}
.category-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0f172a;
}
.category-card-thumb a {
  display: block;
  width: 100%;
  height: 100%;
}
.category-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.category-article-card:hover .category-card-thumb img {
  transform: scale(1.06);
}

/* Huy hiệu lịch ngày đăng góc ảnh theo mẫu thicongcocnhoi.vn */
.category-date-badge {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: linear-gradient(180deg, #166534, #14532d);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 6px;
  padding: 6px 12px;
  text-align: center;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
  z-index: 2;
  min-width: 62px;
  pointer-events: none;
}
.category-date-badge .badge-day {
  display: block;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.5px;
  color: #ffffff;
}
.category-date-badge .badge-month {
  display: block;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  color: #fef08a;
  margin-top: 2px;
  white-space: nowrap;
}

.category-card-body {
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.category-card-title {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.4;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 40px;
}
.category-card-title a {
  color: #0f172a;
  text-decoration: none;
  transition: color 0.2s ease;
}
.category-card-title a:hover {
  color: var(--accent-gold);
}
.category-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #64748b;
  margin-bottom: 10px;
}
.category-card-meta .meta-sep {
  color: #cbd5e1;
}
.category-card-meta .meta-author {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.category-card-excerpt {
  font-size: 13px;
  line-height: 1.55;
  color: #475569;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.category-card-link {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--primary-green);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  transition: var(--transition);
}
.category-card-link:hover {
  color: var(--accent-gold);
  transform: translateX(3px);
}

/* ==========================================================================
   SIDEBAR CỘT PHẢI: FORM BÁO GIÁ + WIDGETS XANH ĐEN + HOTLINE PILL
   ========================================================================== */
.category-sidebar {
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.sidebar-box {
  background: #ffffff;
  border-radius: 6px;
  border: 1px solid #e2e8f0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}
.sidebar-navy-header {
  background: linear-gradient(135deg, #166534, #15803d);
  color: #ffffff;
  font-size: 14.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: center;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}
.sidebar-articles-list {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar-article-item {
  display: flex;
  gap: 12px;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid #f1f5f9;
}
.sidebar-article-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}
.sidebar-article-thumb {
  width: 72px;
  height: 72px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  background: #0f172a;
  display: block;
}
.sidebar-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.sidebar-article-item:hover .sidebar-article-thumb img {
  transform: scale(1.08);
}
.sidebar-article-info {
  flex: 1;
  min-width: 0;
}
.sidebar-article-title {
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-article-title a {
  color: #0f172a;
  text-decoration: none;
  transition: color 0.2s ease;
}
.sidebar-article-title a:hover {
  color: var(--accent-gold);
}
.sidebar-article-date {
  font-size: 11px;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
}

/* Hotline Pill Button ở chân Sidebar */
.sidebar-hotline-wrap {
  text-align: center;
}
.sidebar-hotline-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 20px;
  border: 2px solid var(--primary-green);
  border-radius: 50px;
  color: var(--primary-green);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.25s ease;
  background: #ffffff;
}
.sidebar-hotline-pill svg {
  width: 18px;
  height: 18px;
}
.sidebar-hotline-pill:hover {
  background: var(--primary-green);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(22, 101, 52, 0.25);
  transform: translateY(-1px);
}

/* Form Báo Giá Nhanh Sidebar */
.sidebar-quote-box {
  border-top: 4px solid var(--accent-gold);
}
.sidebar-quote-body {
  padding: 18px 16px;
}
.sidebar-quote-desc {
  font-size: 13px;
  color: #64748b;
  margin-bottom: 14px;
  line-height: 1.5;
}
.sidebar-form-group {
  margin-bottom: 12px;
}
.sidebar-form-group label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: #334155;
  margin-bottom: 4px;
}
.sidebar-form-group input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background: #f8fafc;
  box-sizing: border-box;
}
.sidebar-form-group input:focus {
  border-color: var(--primary-green);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(22, 101, 52, 0.1);
}
.sidebar-quote-btn {
  width: 100%;
  padding: 11px 16px;
  background: linear-gradient(135deg, #d97706, #f59e0b);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
  margin-top: 6px;
}
.sidebar-quote-btn:hover {
  background: linear-gradient(135deg, #b45309, #d97706);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.4);
}
.sidebar-quote-note {
  text-align: center;
  font-size: 11.5px;
  color: #94a3b8;
  margin-top: 10px;
}

/* ==========================================================================
   PHỤ LỤC BÀI VIẾT (TOC SIDEBAR BÊN PHẢI - THU GỌN / MỞ RỘNG - KHÔNG ĐÁNH SỐ)
   ========================================================================== */
.article-toc-box {
  background: #ffffff;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
  position: sticky;
  top: 88px;
  z-index: 10;
  transition: box-shadow 0.2s ease;
}
.article-toc-header {
  background: var(--primary-green);
  color: #ffffff;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.article-toc-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}
.toc-toggle-btn {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}
.toc-toggle-btn:hover {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
  color: #ffffff;
}
.article-toc-body {
  padding: 16px 18px;
  max-height: 500px;
  overflow-y: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.article-toc-box.is-collapsed .article-toc-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
  overflow: hidden;
}
.toc-list-unstyled {
  list-style: none;
  margin: 0;
  padding: 0;
}
.toc-item {
  margin-bottom: 10px;
  position: relative;
}
.toc-item:last-child {
  margin-bottom: 0;
}
.toc-item.toc-h3 {
  padding-left: 18px;
  font-size: 13px;
}
.toc-item.toc-h3::before {
  content: "–";
  position: absolute;
  left: 6px;
  color: #94a3b8;
}
.toc-link {
  color: #334155;
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.45;
  display: block;
  font-weight: 600;
  transition: color 0.2s ease, transform 0.2s ease;
}
.toc-item.toc-h2 > .toc-link {
  font-weight: 700;
  color: #0f172a;
}
.toc-item.toc-h2 > .toc-link::before {
  content: "•";
  color: var(--primary-green);
  font-weight: 700;
  margin-right: 6px;
}
.toc-link:hover {
  color: var(--accent-gold) !important;
  transform: translateX(3px);
}
.toc-item.active > .toc-link {
  color: var(--accent-gold) !important;
  font-weight: 700;
}

/* ==========================================================================
   PHÂN TRANG CHUẨN SEO (PAGINATION)
   ========================================================================== */
.category-pagination {
  margin-top: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  color: #1e293b;
  text-decoration: none;
  transition: all 0.2s ease;
}
.page-btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  background: #fffbeb;
  transform: translateY(-1px);
}
.page-btn.active {
  background: var(--primary-green);
  border-color: var(--primary-green);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(22, 101, 52, 0.2);
}

@media (max-width: 1024px) {
  .category-archive-layout {
    grid-template-columns: 1fr;
  }
  .category-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .category-articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .category-specs-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   2 ICON POPUP NỔI CỐ ĐỊNH (GỌI ĐIỆN & CHAT ZALO - BÊN PHẢI MÀN HÌNH)
   Mặc định: Là 2 vòng tròn gọn gàng (50px x 50px)
   Khi di chuột (hover): Bung trượt số điện thoại sang bên TRÁI
   ========================================================================== */
.floating-contact-wrap {
  position: fixed;
  bottom: 35px;
  right: 25px;
  left: auto;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}

.floating-btn {
  position: relative;
  display: inline-flex;
  flex-direction: row-reverse;
  align-items: center;
  justify-content: flex-start;
  height: 50px;
  min-width: 50px;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.22);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
  overflow: hidden;
  cursor: pointer;
}

.floating-btn-call {
  background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
}

.floating-btn-zalo {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
}

.floating-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.floating-text {
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  letter-spacing: 0.3px;
  max-width: 0;
  opacity: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
  transition: max-width 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease, padding 0.35s ease;
}

/* HIỆU ỨNG KHI DI CHUỘT: MỞ RỘNG SANG TRÁI VÀ HIỆN SỐ */
.floating-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.floating-btn:hover .floating-icon {
  transform: scale(1.08);
}

.floating-btn:hover .floating-text {
  max-width: 220px;
  opacity: 1;
  padding-left: 18px;
  padding-right: 6px;
}

.floating-pulse {
  position: absolute;
  top: 0;
  right: 0;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  pointer-events: none;
}

.floating-btn-call .floating-pulse {
  box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7);
  animation: floatPulseCall 2s infinite;
}

.floating-btn-zalo .floating-pulse {
  box-shadow: 0 0 0 0 rgba(2, 132, 199, 0.7);
  animation: floatPulseZalo 2s infinite;
}

@keyframes floatPulseCall {
  0% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7); }
  70% { box-shadow: 0 0 0 16px rgba(22, 163, 74, 0); }
  100% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

@keyframes floatPulseZalo {
  0% { box-shadow: 0 0 0 0 rgba(2, 132, 199, 0.7); }
  70% { box-shadow: 0 0 0 16px rgba(2, 132, 199, 0); }
  100% { box-shadow: 0 0 0 0 rgba(2, 132, 199, 0); }
}

@media (max-width: 768px) {
  /* ẨN HOÀN TOÀN 2 ICON TRÒN TRÊN DI ĐỘNG ĐỂ TRÁNH ĐÈ CHỮ VÀ HÌNH ẢNH */
  .floating-contact-wrap {
    display: none !important;
  }
}

/* ==========================================================================
   BỐ CỤC TRANG LIÊN HỆ: 2 CỘT BẰNG CHIỀU CAO (ĐỊA CHỈ TRÊN, BẢN ĐỒ DƯỚI)
   ========================================================================== */
.contact-grid-container {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 36px;
  align-items: stretch;
}

.contact-info-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
  height: 100%;
}

.contact-map-box {
  flex: 1;
  min-height: 250px;
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  position: relative;
}

@media (max-width: 991px) {
  .contact-grid-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .contact-map-box {
    min-height: 320px;
  }
}

/* ==========================================================================
   TỐI ƯU GIAO DIỆN DI ĐỘNG (MOBILE RESPONSIVE 2026)
   ========================================================================== */

/* 1. Lớp Ẩn/Hiện Linh Hoạt */
.desktop-only {
  display: flex !important;
}
.mobile-only {
  display: none !important;
}
@media (max-width: 768px) {
  .desktop-only {
    display: none !important;
  }
  .mobile-only {
    display: flex !important;
  }
}

/* 2. Khối Giới Thiệu Năng Lực (Trang Chủ - Section 2) */
.home-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 45px;
  align-items: center;
}
.home-intro-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
@media (max-width: 768px) {
  .home-intro-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .home-intro-highlights {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* 3. Khối 4 Lý Do Tin Tưởng (Trang Chủ - Section 7) */
.why-us-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 991px) {
  .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}
@media (max-width: 600px) {
  .why-us-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

/* 4. Bảng Báo Giá 2026: Mobile Cards (Phương Án A) */
.pricing-cards-mobile {
  display: none;
}
@media (max-width: 768px) {
  .pricing-table-wrap {
    display: none !important;
  }
  .pricing-cards-mobile {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
  }
  .pricing-card-item {
    background: #ffffff;
    border-radius: 12px;
    border: 1.5px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, border-color 0.2s ease;
  }
  .pricing-card-item.featured {
    border-color: var(--primary-green);
    box-shadow: 0 6px 20px rgba(22, 101, 52, 0.12);
  }
  .pricing-card-header {
    background: #f8fafc;
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
  }
  .pricing-card-item.featured .pricing-card-header {
    background: linear-gradient(135deg, #0d5c3a 0%, #15803d 100%);
    color: #ffffff;
  }
  .pricing-card-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #64748b;
    margin-bottom: 4px;
  }
  .pricing-card-item.featured .pricing-card-badge {
    color: #fef08a;
  }
  .pricing-card-name {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
    color: var(--dark-slate);
  }
  .pricing-card-item.featured .pricing-card-name {
    color: #ffffff;
  }
  .pricing-card-body {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .pricing-spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13.5px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #f1f5f9;
  }
  .pricing-spec-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .pricing-spec-row.pricing-highlight {
    background: #fffbeb;
    margin: 4px -18px 0;
    padding: 10px 18px;
    border-top: 1px solid #fef3c7;
    border-bottom: 1px solid #fef3c7;
  }
  .pricing-spec-row .spec-label {
    color: #64748b;
  }
  .pricing-spec-row .spec-value {
    color: #0f172a;
    font-weight: 600;
  }
  .pricing-spec-row .price-gold {
    color: #b45309;
    font-size: 15px;
    font-weight: 700;
  }
  .pricing-card-footer {
    padding: 12px 18px 16px;
  }
  .pricing-card-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 11px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    background: #f1f5f9;
    color: var(--dark-slate);
    border: 1px solid #cbd5e1;
    transition: all 0.2s ease;
  }
  .pricing-card-btn.btn-primary,
  .pricing-card-item.featured .pricing-card-btn {
    background: var(--accent-gold);
    color: #ffffff;
    border-color: var(--accent-gold);
    box-shadow: 0 3px 10px rgba(245, 158, 11, 0.3);
  }
}

/* 5. Trang Chi Tiết Bài Viết (Detail Layout 1 Cột trên Mobile) */
.article-detail-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 36px;
}
@media (max-width: 991px) {
  .article-detail-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ==========================================================================
   MULTI-BANNER HERO SLIDER & CMS WIDGETS
   ========================================================================== */
.hero-slider-container {
  position: relative;
  background: #0b1523;
  overflow: hidden;
}
.hero-slider-track {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-position: center right;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  pointer-events: none;
}
.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}
.hero-slide-hitarea {
  display: block;
  width: 100%;
  height: 100%;
}
.hero-slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-size: 26px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: all 0.2s ease;
  backdrop-filter: blur(4px);
  padding: 0;
}
.hero-slider-arrow:hover {
  background: var(--accent-gold);
  color: #0f172a;
  border-color: var(--accent-gold);
}
.hero-arrow-prev {
  left: 18px;
}
.hero-arrow-next {
  right: 18px;
}
.hero-slider-dots {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.hero-slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  padding: 0;
}
.hero-slider-dot.is-active {
  width: 32px;
  background: var(--accent-gold);
}
@media (max-width: 768px) {
  .hero-slider-arrow {
    display: none;
  }
}

/* ==========================================================================
   TESTIMONIALS SECTION (ĐÁNH GIÁ CHỦ ĐẦU TƯ & KỸ SƯ)
   ========================================================================== */
.testimonials-section {
  background: #f8fafc;
  padding: 70px 0;
  border-top: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
@media (max-width: 991px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}
.testimonial-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.testimonial-quote {
  font-size: 14.5px;
  line-height: 1.65;
  color: #334155;
  margin-bottom: 20px;
  position: relative;
  font-style: italic;
}
.testimonial-quote::before {
  content: '“';
  font-size: 40px;
  color: var(--primary-green);
  line-height: 0;
  display: block;
  margin-bottom: 12px;
  opacity: 0.6;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid #f1f5f9;
}
.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-green);
  flex-shrink: 0;
}
.testimonial-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 2px;
}
.testimonial-company {
  font-size: 11.5px;
  font-weight: 600;
  color: #0284c7;
  text-transform: uppercase;
}

/* ==========================================================================
   PARTNERS SECTION (ĐỐI TÁC CUNG ỨNG VẬT TƯ & KIỂM ĐỊNH)
   ========================================================================== */
.partners-section {
  background: #0f172a;
  padding: 50px 0;
  color: #ffffff;
}
.partners-header {
  text-align: center;
  margin-bottom: 28px;
}
.partners-badge {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-gold);
  letter-spacing: 1px;
  margin-bottom: 6px;
  display: block;
}
.partners-title {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 20px;
}
.partner-logo-item {
  background: #ffffff;
  border-radius: 8px;
  padding: 10px 18px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
}
.partner-logo-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}
.partner-logo-item img {
  max-height: 40px;
  max-width: 120px;
  object-fit: contain;
  filter: grayscale(20%);
  transition: filter 0.2s;
}
.partner-logo-item:hover img {
  filter: grayscale(0%);
}