/* === CÀI ĐẶT CHUNG & BIẾN MÀU === */
:root {
  --primary-color: #e90b0b;
  --secondary-color: #ff8c00;
  --phone-color: #d9534f;
  --zalo-color: #0068ff;
  --text-dark: #333;
  --text-light: #fff;
  --bg-light: #fff;
  --bg-grey: #f4f4f4;
  --border-color: #ddd;
  --warning-bg: #fffbe6;
  --warning-border: #ffe58f;
  --warning-text: #d46b08;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--bg-light);
}
.container {
  max-width: 1200px;
  margin: auto;
  padding: 0 15px;
}
section {
  padding: 60px 0;
}
.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--primary-color);
  text-transform: uppercase;
}
.section-subtitle {
  text-align: center;
  font-size: 1rem;
  color: #666;
  margin-top: -15px;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}
a {
  text-decoration: none;
}

/* === TOP BAR === */
.top-bar {
  background: var(--primary-color);
  color: var(--text-light);
  padding: 10px 0;
  font-size: 0.9rem;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.top-bar a {
  color: var(--text-light);
}

/* === HEADER & NAVBAR === */
.navbar {
  background: var(--bg-light);
  position: sticky;
  top: 0;
  z-index: 1002;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.navbar .nav-links {
  list-style: none;
  display: flex;
}
.navbar .nav-links li {
  margin-left: 15px;
}
.navbar .nav-links a {
  color: var(--text-dark);
  font-weight: 700;
  text-transform: uppercase;
  padding: 5px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.3s ease;
  font-size: 0.85rem;
  white-space: nowrap;
}
.navbar .nav-links a:hover,
.navbar .nav-links a.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}
.navbar .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: initial;
  font-weight: initial;
}
.navbar .logo .logo-icon {
  height: 80px;
  width: auto;
}
.navbar .logo .logo-text {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1;
}
.menu-icon {
  display: none;
  cursor: pointer;
}
.menu-icon div {
  width: 30px;
  height: 3px;
  background-color: var(--text-dark);
  margin: 6px 0;
}
.btn {
  background: var(--secondary-color);
  color: var(--text-light);
  padding: 15px 35px;
  border-radius: 5px;
  font-weight: 700;
  text-transform: uppercase;
  transition: transform 0.3s ease, background-color 0.3s ease;
  display: inline-block;
}
.btn:hover {
  background-color: #e67e22;
  transform: scale(1.05);
}

/* === HERO SLIDESHOW (Trang chủ) === */
.hero {
  position: relative;
  height: 60vh;
  overflow: hidden;
  background-color: #fff;
}
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}
.slide.active {
  opacity: 1;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.1);
}
.text-banner {
  background: var(--bg-grey);
  padding: 40px 0;
  text-align: center;
}
.text-banner h1 {
  font-size: 2.8rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}
.text-banner p {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: #555;
}

/* === ABOUT SECTION / PAGE === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}
.about-grid .about-text h3 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}
.about-grid .about-text h4 {
  font-size: 1.3rem;
  color: var(--text-dark);
  margin-top: 25px;
  margin-bottom: 15px;
}
.about-grid .about-text p {
  margin-bottom: 15px;
}
.about-grid .about-text ul {
  list-style: none;
  padding-left: 0;
}
.about-grid .about-text ul li {
  margin-bottom: 12px;
  padding-left: 28px;
  position: relative;
}
.about-grid .about-text ul li::before {
  content: "✔";
  color: var(--primary-color);
  position: absolute;
  left: 0;
  font-weight: bold;
  font-size: 1.2rem;
}

/* === WHY CHOOSE US (Trang chủ) === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}
.feature-item {
  background: var(--bg-light);
  padding: 30px;
  text-align: center;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
}
.feature-item .icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}
.feature-item h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

/* === DANH MỤC DỊCH VỤ / THU MUA === */
.machines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
}
.machine-item {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-light);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.machine-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}
.machine-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.machine-item .caption {
  padding: 20px;
  font-weight: 700;
  font-size: 1.1rem;
  text-align: center;
}

/* === BẢNG GIÁ PAGE / SECTION === */
.price-intro-text {
  max-width: 800px;
  margin: 0 auto 40px auto;
  text-align: center;
  font-size: 1.1rem;
  line-height: 1.8;
}
.price-disclaimer {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  padding: 25px;
  border-radius: 8px;
  margin-bottom: 50px;
  text-align: center;
}
.price-disclaimer h4 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.price-disclaimer p {
  margin-bottom: 15px;
}
.price-disclaimer a {
  font-weight: bold;
  color: var(--primary-color);
}
.price-table-wrapper {
  overflow-x: auto;
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.price-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.price-table th,
.price-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}
.price-table thead tr {
  background-color: var(--primary-color);
  color: var(--text-light);
}
.price-table th {
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}
.price-table tbody tr {
  background-color: var(--bg-light);
}
.price-table tbody tr:nth-child(even) {
  background-color: var(--bg-grey);
}
.price-table tbody tr:last-child td {
  border-bottom: none;
}
.price-table tbody tr:hover {
  background-color: #e9e9e9;
}
.price-table .price {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 1.1rem;
}

/* === PROCESS SECTION (Trang chủ) === */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  text-align: center;
}
.process-item {
  position: relative;
  padding: 20px;
}
.process-item .step-number {
  width: 60px;
  height: 60px;
  background: var(--primary-color);
  color: var(--text-light);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.8rem;
  font-weight: bold;
  margin: 0 auto 20px;
  border: 4px solid var(--bg-grey);
}
.process-item h3 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

/* === QUY TRÌNH TIMELINE PAGE === */
.process-timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}
.process-timeline::after {
  content: "";
  position: absolute;
  width: 4px;
  background-color: var(--primary-color);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -2px;
}
.process-step {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}
.process-step::after {
  content: "";
  position: absolute;
  width: 25px;
  height: 25px;
  right: -13px;
  background-color: white;
  border: 4px solid var(--primary-color);
  top: 25px;
  border-radius: 50%;
  z-index: 1;
}
.process-step.left {
  left: 0;
}
.process-step.right {
  left: 50%;
}
.process-step.left::before {
  content: " ";
  height: 0;
  position: absolute;
  top: 32px;
  width: 0;
  z-index: 1;
  right: 30px;
  border: medium solid var(--border-color);
  border-width: 10px 0 10px 10px;
  border-color: transparent transparent transparent var(--border-color);
}
.process-step.right::before {
  content: " ";
  height: 0;
  position: absolute;
  top: 32px;
  width: 0;
  z-index: 1;
  left: 30px;
  border: medium solid var(--border-color);
  border-width: 10px 10px 10px 0;
  border-color: transparent var(--border-color) transparent transparent;
}
.process-step.right::after {
  left: -13px;
}
.process-content {
  padding: 20px 30px;
  background-color: white;
  position: relative;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}
.process-content .step-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 5px;
}
.process-content h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

/* === TRANG LIÊN HỆ === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: flex-start;
}
.contact-details h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 25px;
  font-size: 1.05rem;
}
.contact-info-item .icon {
  margin-right: 15px;
  color: var(--primary-color);
  width: 24px;
  flex-shrink: 0;
  margin-top: 4px;
}
.contact-info-item strong {
  display: block;
  color: var(--text-dark);
  margin-bottom: 3px;
  font-size: 1rem;
}
.contact-info-item a {
  color: var(--text-dark);
}
.contact-info-item a:hover {
  color: var(--primary-color);
}
.contact-form-wrapper {
  background: var(--bg-grey);
  padding: 30px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.contact-form-wrapper h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  text-align: center;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 15px;
  margin-bottom: 15px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  font-size: 1rem;
  font-family: inherit;
}
.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}
.contact-form button {
  width: 100%;
}
.map-section iframe {
  width: 100%;
  height: 450px;
  border: 0;
  border-radius: 8px;
}

/* === 404 ERROR PAGE === */
.error-section {
  text-align: center;
  padding: 80px 20px;
}
.error-section .error-code {
  font-size: 10rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
  line-height: 1;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}
.error-section .error-title {
  font-size: 2rem;
  margin-top: 10px;
  margin-bottom: 20px;
}
.error-section .error-message {
  font-size: 1.1rem;
  color: #666;
  max-width: 600px;
  margin: 0 auto 40px auto;
}

/* === FOOTER === */
.footer {
  background: #222;
  color: #ccc;
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  padding-bottom: 40px;
}
.footer-col h4 {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.footer-col p,
.footer-col li {
  margin-bottom: 10px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
}
.footer-col a {
  color: #ccc;
  transition: color 0.3s;
}
.footer-col a:hover {
  color: var(--secondary-color);
}
.footer-col .map-container {
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  height: 92%;
  min-height: 220px;
}
.footer-col .map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}
.footer-bottom {
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid #444;
}

/* === NÚT GỌI & ZALO NỔI === */
.floating-buttons {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.floating-buttons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  color: var(--text-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}
.floating-buttons a:hover {
  transform: scale(1.1);
}
.floating-buttons a svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}
.phone-float {
  background-color: var(--phone-color);
}
.zalo-float {
  background-color: var(--zalo-color);
}

/* === CSS MENU DI ĐỘNG & HIỆU ỨNG === */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 992px) {
  .navbar .logo .logo-text {
    font-size: 1.5rem;
  }
  .navbar .nav-links li {
    margin-left: 10px;
  }
  .navbar .nav-links a {
    font-size: 0.75rem;
  }
  .text-banner h1 {
    font-size: 2.2rem;
  }
  .text-banner p {
    font-size: 1rem;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .about-grid .about-image {
    order: -1;
    margin-bottom: 30px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  section {
    padding: 40px 0;
  }
  .section-title {
    font-size: 2rem;
  }
  .top-bar {
    font-size: 0.8rem;
  }
  .top-bar .container {
    justify-content: center;
    text-align: center;
    gap: 5px;
  }
  .navbar .logo .logo-icon {
    height: 65px;
  }
  .navbar .logo .logo-text {
    font-size: 1.3rem;
  }
  /* --- Cải tiến nút Hamburger --- */
  .menu-icon {
    display: block;
    z-index: 1003;
    transition: all 0.3s ease;
    position: absolute;
    top: 25px;
    right: 15px;
  }
  .menu-icon div {
    transition: all 0.3s ease;
  }
  /* Hiệu ứng chuyển thành dấu X */
  .menu-icon.active div:nth-child(1) {
    transform: rotate(-45deg) translate(-7px, 7px);
  }
  .menu-icon.active div:nth-child(2) {
    opacity: 0;
  }
  .menu-icon.active div:nth-child(3) {
    transform: rotate(45deg) translate(-7px, -7px);
  }
  /* --- Cải tiến thanh menu trượt --- */
  .navbar .nav-links {
    flex-direction: column;
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background: var(--bg-light);
    box-shadow: -4px 0 15px rgba(0, 0, 0, 0.15);
    z-index: 1002;
    padding-top: 100px;
    transition: right 0.35s ease-in-out;
    display: flex;
  }
  .navbar .nav-links.active {
    right: 0;
  }
  .navbar .nav-links li {
    margin: 0;
    width: 100%;
  }
  .navbar .nav-links a {
    display: block;
    padding: 18px 25px;
    text-align: left;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  .navbar .nav-links a:hover,
  .navbar .nav-links a.active {
    background-color: var(--bg-grey);
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
  }
  .btn {
    padding: 12px 28px;
    font-size: 0.9rem;
  }
  .hero {
    height: 40vh;
  }
  .text-banner h1 {
    font-size: 1.8rem;
    line-height: 1.3;
  }
  .text-banner p {
    font-size: 1rem;
    margin-bottom: 20px;
  }
  /* Responsive cho timeline */
  .process-timeline::after {
    left: 31px;
  }
  .process-step {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  .process-step::before {
    left: 60px;
    border: medium solid var(--border-color);
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--border-color) transparent transparent;
  }
  .process-step.left::after,
  .process-step.right::after {
    left: 18px;
  }
  .process-step.right {
    left: 0%;
  }
  .error-section .error-code {
    font-size: 8rem;
  }
  .error-section .error-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .navbar .logo .logo-text {
    display: none;
  }
  .text-banner h1 {
    font-size: 1.5rem;
  }
}