/* ==== RESET ==== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Arial', sans-serif;
}
/* Hiệu ứng cho lớp phủ logo */
.intro-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: fadeOutOverlay 2s ease-in-out forwards;
  animation-delay: 1.8s;
}

.intro-logo {
  width: 1400px;
  height: 700px;
  margin-right: 450px;
  margin-bottom: 300px;
}

.intro-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@keyframes fadeOutOverlay {
  0% { opacity: 1; }
  100% { opacity: 0; visibility: hidden; }
}

.intro-overlay[style*="opacity: 0"] {
  display: none;
}

/* Hiệu ứng cho nội dung trang */
body {
  opacity: 0;
  animation: fadeInBody 5s ease-in-out forwards;
  animation-delay: 1s;
}

@keyframes fadeInBody {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
  .intro-logo {
    width: 200px;
    height: 150px;
  }
}

@media (max-width: 480px) {
  .intro-logo {
    width: 150px;
    height: 100px;
  }
}
/* ==== LOGO + BANNER ==== */
.logo-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  /* padding: 20px 30px; */
  gap: 20px;
}

/* Logo */
.logo-container {
  position: relative;
  width: 200px;
  height: 140px;
  margin: 90px;
}

.logo {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
  transition: opacity 0.5s ease;
}

.logo.hover {
  opacity: 0;
}

.logo-container:hover .hover {
  opacity: 1;
}

.logo-container:hover .default {
  opacity: 0;
}

/* Banner */
.banner {
  max-width: 700px;
  height: 300px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  margin-right: 113px;
}

  .slider {
    position: relative;
    width: 100%;
    height: 1200px;
    overflow: hidden;
  }

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1200px;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  z-index: 0;
}

.slide.active {
  opacity: 1;
  z-index: 1;
}


/* ==== HEADER NAVIGATION ==== */
.main-nav {
  position: relative;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  padding: 15px 0;
  transition: all 0.3s ease;
  z-index: 1001;
  /* height: 80px; */
}

.main-nav.sticky {
  position: fixed;
  top: 0;
  left: 0;
  background-color: #f6b600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.nav-menu-container {
  transition: max-height 0.3s ease-in-out;
  display: flex;
  gap: 20px; /* tuỳ chỉnh */
  position: static;
  max-height: none;
  overflow: visible;
  background-color: transparent;
}

.nav-menu {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 20px;
  height: 60px;
}

.nav-menu li {
  margin: 0 12px;
}

.nav-menu a {
  color: white;
  text-decoration: none;
  padding: 12px 0px;
  font-weight: bold;
  transition: background 0.3s, color 0.3s;
  font-size: 16px;
  line-height: 1.5;
  margin-left: 0px;
}

.nav-menu a:hover {
  background-color: #ffffff;
  border-radius: 6px;
  color: #f6b600;
}

.hamburger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 32px;
  height: 22px;
  cursor: pointer;
  margin: 15px 25px;
  position: absolute;
  top: 0;
  right: 15px;
  display: none;
}

.hamburger-menu span {
  width: 100%;
  height: 3px;
  background-color: white;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-menu.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ==== HERO IMAGE SECTION ==== */
.hero-banner {
  position: relative;
  width: 100%;
  height: 1200px;
  overflow: hidden;
}

.hero-banner img {
  width: 100%;
  height: 1200px;
  object-fit: cover;
  display: block;
}

/* ==== INFO BUTTON ==== */
.info-box {
  position: fixed;
  bottom: 50px;
  right: 50px;
  z-index: 1000;
}

.info-toggle {
  background-color: #8c672b;
  color: white;
  padding: 12px 20px;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
  width: 306px;
  height: 50px;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.info-toggle .icon {
  margin-left: 10px;
  font-size: 20px;
}

.info-form {
  background-color: #066b76;
  color: white;
  padding: 25px;
  width: 350px;
  border-radius: 8px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
  margin-right: 10px;
}

.form-header {
  background-color: #8c672b;
  font-weight: bold;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 6px 6px 0 0;
  font-size: 15px;
}

.close-btn {
  cursor: pointer;
  font-size: 22px;
}

.info-form input {
  width: 100%;
  margin: 12px 0;
  padding: 12px;
  border: none;
  border-radius: 4px;
  font-size: 16px;
}

.info-form button {
  width: 100%;
  padding: 12px;
  background-color: #8c672b;
  color: white;
  border: none;
  font-weight: bold;
  cursor: pointer;
  border-radius: 4px;
  font-size: 16px;
}

.info-form button:hover {
  background-color: #a57c2e;
}

.hidden {
  display: none;
}

/* ==== ROLL CONTAINER ==== */
.roll-container {
  height: 120px;
  width: 120px;
  border-radius: 12px;
  animation: roll 3s ease-in-out infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to bottom, #f3e568, #c9a83c);
  overflow: hidden;
  margin: 50px auto;
}

.roll-text {
  font-size: 36px;
  color: white;
  font-weight: bold;
  text-transform: uppercase;
}

@keyframes roll {
  0% { transform: translateX(-200px) rotate(0deg); }
  50% { transform: translateX(200px) rotate(360deg); }
  100% { transform: translateX(-200px) rotate(0deg); }
}

.roll-container:hover {
  animation-play-state: paused;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.4);
}

/* ==== FOOTER STYLES ==== */
.footer-section {
  background: linear-gradient(145deg, #ffffff, #f1f1f1);
  padding: 80px 30px 40px;
  color: #333;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-form {
  flex: 1;
  min-width: 300px;
  background: #fff;
  padding: 30px;
  border-radius: 14px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.footer-form h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 25px;
  color: #222;
}

.footer-form input {
  width: 100%;
  padding: 14px;
  margin-bottom: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
}

.footer-form button {
  background-color: #f6b600;
  color: #fff;
  border: none;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.footer-form button:hover {
  background-color: #e0a800;
}

.footer-why {
  flex: 1;
  min-width: 300px;
}

.footer-why h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-why ul {
  list-style: disc;
  padding-left: 25px;
}

.footer-why li {
  margin-bottom: 15px;
  font-size: 16px;
}

.footer-why ul li:hover {
  color: #e09500;
}

.footer-bottom {
  margin-top: 60px;
  border-top: 1px solid #ddd;
  padding-top: 25px;
  text-align: center;
}

.footer-bottom p {
  font-size: 16px;
  color: #555;
}

.footer-bottom a {
  color: #000;
  text-decoration: underline;
}

/* ==== CONTACT BUTTONS ==== */
.contact-buttons {
    margin: 30px;
    display: flex;
    /* flex-direction: column; */
    gap: 25px;
    z-index: 1000;

}

.contact-button {
  width: 45px;
  height: 45px;
  background-color: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s;
}

.contact-button img {
  width: 32px;
  height: 32px;
}

.contact-button.messenger {
  background: linear-gradient(45deg, #d11aff, #0099ff);
}

.contact-button.zalo {
  background-color: #ffffff;
}

.contact-button.zalo img {
  filter: brightness(0) saturate(100%) invert(28%) sepia(64%) saturate(435%) hue-rotate(178deg) brightness(97%) contrast(97%);
}

.notification-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: red;
  color: white;
  font-size: 14px;
  padding: 4px 8px;
  border-radius: 50%;
}

/* .shake {
  animation: rotate-shake 5s ease-in-out infinite;
} */

@keyframes rotate-shake {
  0% { transform: rotate(15deg); }
  10% { transform: rotate(-20deg); }
  20% { transform: rotate(20deg); }
  30% { transform: rotate(-20deg); }
  40% { transform: rotate(20deg); }
  50% { transform: rotate(-18deg); }
  60% { transform: rotate(18deg); }
  70% { transform: rotate(-17deg); }
  80% { transform: rotate(17deg); }
  90% { transform: rotate(-16deg); }
  100% { transform: rotate(15deg); }
}

/* .contact-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.8);
  animation: pulse-ring 2s ease-out infinite;
  z-index: -1;
} */

@keyframes pulse-ring {
  0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  70% { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
}

/* ==== VIDEO SECTION ==== */
#video-container {
  /* padding: 50px 30px; */
  text-align: center;
  background-color: #f9f9f9;
}

#video-container h2 {
  font-size: 36px;
  color: #333;
  margin-bottom: 25px;
  margin-top: 10px;
}

.video-container {
  max-width: 1100px;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
}

.video-container video {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 14px;
}

.vidi {
  height: 650px;
}

.video-controls {
  position: absolute;
  bottom: 15px;
  right: 15px;
  display: flex;
  gap: 12px;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.video-container:hover .video-controls {
  opacity: 1;
  pointer-events: auto;
}

.video-controls button {
  /* background-color: rgba(0, 0, 0, 0.6);
  color: white; */
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
}

.video-controls button:hover {
  background-color: rgba(0, 0, 0, 0.9);
}

/* ==== CONTENT ==== */
body {
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  overflow-x: hidden; /* Prevent horizontal overflow */
  opacity: 0;
  animation: fadeInBody 5s ease-in-out forwards;
}
@keyframes fadeInBody {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

/* Hiệu ứng cho các section */
section, .image-container, .roll-container, .video-container, .bang-gia, .chi-tiet {
  opacity: 0;
  transform: translateY(50px); /* Bắt đầu từ dưới lên 50px */
  transition: opacity 2s ease-out, transform 2s ease-out;
}

section.visible, .image-container.visible, .roll-container.visible, .video-container.visible, .bang-gia.visible, .chi-tiet.visible {
  opacity: 1;
  transform: translateY(0); /* Trở về vị trí ban đầu */
}

/* Đảm bảo các section trong .tong được xử lý */
.tong section {
  /* margin-bottom: 40px; */
}

.wrapper {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  padding: 30px;
}

.sidebar {
  width: 300px;
  position: sticky;
  top: 120px;
  margin-top: 40px;
  margin-bottom: 80px;
  margin-left: 35px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar ul li a {
  display: block;
  padding: 10px 20px;
  color: #333;
  text-decoration: none;
  transition: background 0.3s;
  font-size: 16px;
}

.sidebar ul li a.active,
.sidebar ul li a:hover {
  background-color: #0073c6;
  color: white;
  border-radius: 6px;
}

.contact-box {
  margin-top: 10px;
  padding: 15px 25px;
  background-color: #f60;
  color: white;
  font-size: 16px;
}
.contact-link {
  color: white;
  text-decoration: none;
}

.contact-link:hover {
  text-decoration: underline; /* tuỳ chọn nếu muốn gạch chân khi hover */
}

.tong {
  padding: 30px;
  flex: 1;
  margin-top: 40px;
  margin-left: 30px;
}

.tong h1 {
  font-size: 52px;
  font-weight: 500;
  line-height: 1.5;
}

.tong h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.5;
}

.tong h4 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.5;
}

.tong h5 {
  font-size: 22px;
  line-height: 1.5;
}

.tong li {
  font-size: 18px;
  line-height: 1.5;
}

.tong p {
  font-size: 18px;
  line-height: 1.5;
}

.tien {
  width: 100%;
  max-width: 900px;
  height: auto;
  margin: 30px auto;
  display: block;
}

.tong section img {
  width: 100%;
  max-width: 1100px;
  height: auto;
  display: block;
  margin: 20px auto;
}

.image-container {
  overflow: hidden;
  display: block;
  margin-bottom: 10px;
}

.image-container img {
  width: 100%;
  max-width: 900px;
  height: auto;
  transition: transform 3s ease;
}

.image-container:hover img {
  transform: scale(1.1111);
}

.image-container-anh {
  overflow: hidden;
  display: block;
  margin-bottom: 30px;
}

.image-container-anh img {
  width: 100%;
  max-width: 900px;
  height: auto;
  transition: transform 0.5s ease;
}

.image-container-anh:hover img {
  transform: scale(1.05);
}

.bang-gia {
  text-align: center;
  width: 300px;
  height: 55px;
  margin: 30px auto;
  padding: 16px;
  color: white;
  font-size: 22px;
  font-weight: bold;
  border-radius: 12px;
  background-color: orange;
  transition: background-color 0.5s ease, color 0.5s ease;
  cursor: pointer;
}

.bang-gia:hover {
  background-color: white;
  color: orange;
  border: 2px solid orange;
}

.related-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 0;
}

.related-section h2,
.related-section h3 {
  text-align: center;
  font-size: 32px;
  margin-bottom: 25px;
  font-weight: 600;
  color: #222;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 25px;
}

.project-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.project-item img {
  width: 120px;
  height: 80px;
  object-fit: cover;
  flex-shrink: 0;
  border-radius: 6px;
}

.project-info {
  flex: 1;
}

.project-info h4 {
  font-size: 16px;
  font-weight: 600;
  color: #222;
  margin: 0 0 8px;
}

.project-info .date {
  font-size: 14px;
  color: #888;
  margin: 0;
}

.chi-tiet {
  width: 220px;
  height: 45px;
  border: 2px solid orange;
  border-radius: 8px;
  background-color: orange;
  font-weight: bold;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chi-tiet p {
  margin: 0;
  padding: 8px;
  font-size: 16px;
}

.chi-tiet::after {
  content: '';
  position: absolute;
  top: 0;
  right: -100%;
  width: 100%;
  /* height: 100%; */
  background: linear-gradient(120deg, rgba(255,255,255,0.8), rgba(255,255,255,0));
  transition: all 0.5s ease;
}

.chi-tiet:hover::after {
  animation: slideLight 1s ease forwards;
}
.chi-tiet:hover{
  background-color: white;
  color: orange;
}

.link {
  width: fit-content;
  margin: 40px auto;
  padding: 0;
}

.youtube-link {
  display: inline-block;
  padding: 12px 24px;
  background-color: #ff0000; /* YouTube red */
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  border-radius: 8px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.youtube-link:hover {
  background-color: #cc0000; /* darker red */
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

/* ==== HOTLINE STYLES ==== */
.hotline {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: #f6b600;
  padding: 10px 15px;
  border-radius: 5px;
  color: white;
  font-weight: bold;
  font-size: 16px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
}

.hotline img {
  width: 20px;
  height: 20px;
}

.hotline:hover {
  background-color: #e69500;
}

@keyframes slideLight {
  from { right: -100%; }
  to { right: 100%; }
}

/* ==== TYPOGRAPHY ==== */
strong {
  transition: 0.3s ease;
  font-size: 20px;
  font-weight: 600;
}

strong:hover {
  color: #e0a800;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}
.zalo-link {
  text-decoration: none; /* Bỏ gạch chân */
  color: inherit;         /* Giữ nguyên màu chữ (hoặc đổi thành màu bạn muốn) */
}
.zalo-link:hover {
  color: orange;                /* Hoặc đổi màu khi hover */
}

/* ==== MOBILE RESPONSIVE ==== */
@media (max-width: 768px) {
  .intro-logo {
    width: 200px;
    height: 150px;
    margin: 0; /* Xóa margin để căn giữa logo */
  }

  .slider {
    height: 400px; /* Giảm chiều cao slider cho phù hợp */
  }

  .slide {
    height: 400px;
    width: 100%;
    object-fit: cover;
  }

  .logo-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    width: 100%;
    flex-wrap: wrap; /* Cho phép wrap nếu cần */
  }

  .logo-container {
    width: 30%;
    height: 100px;
    margin: 0; /* Xóa margin để căn chỉnh tốt hơn */
  }

  .logo-container img {
    width: 100%;
    height: auto;
    max-height: 100px;
  }

  .banner {
    width: 45%;
    height: 100px;
    margin-right: 0; /* Xóa margin để căn chỉnh */
  }

  .banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .hotline {
    width: 25%;
    font-size: 12px;
    padding: 6px 10px;
    text-align: center;
  }

  .hotline img {
    width: 16px;
    height: 16px;
  }

  body, html {
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    width: 100%;
  }

  /* Giữ nguyên hamburger menu */
  .hamburger-menu {
    display: flex !important;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999;
  }

  .hamburger-menu span {
    width: 30px;
    height: 3px;
    background: #fff;
    display: block;
  }

  .nav-menu-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 998;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateY(-100%);
    transition: transform 0.3s ease-in-out;
    padding: 0;
    margin: 0;
    overflow: hidden;
  }

  .nav-menu-container.active {
    transform: translateY(0);
  }

  .nav-menu {
    flex-direction: column;
    gap: 20px;
    align-items: center;
    padding: 0;
    height: auto;
  }

  .nav-menu li {
    margin: 15px 0;
  }

  .nav-menu li a {
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    padding: 12px;
    margin-left: 0; /* Xóa margin-left để căn giữa */
  }

  .hero-banner {
    height: 400px;
  }

  .hero-banner img {
    height: 400px;
    width: 100%;
    object-fit: cover;
  }

  .info-box {
    bottom: 20px;
    right: 15px;
  }

  .info-toggle {
    width: 250px;
    height: 40px;
    font-size: 14px;
    padding: 10px;
  }

  .info-form {
    width: 280px;
    padding: 15px;
  }

  .info-form input, .info-form button, .form-header {
    font-size: 14px;
  }

  .roll-container {
    height: 90px;
    width: 90px;
    margin: 30px auto;
  }

  .roll-text {
    font-size: 28px;
  }

  @keyframes roll {
    0% { transform: translateX(-120px) rotate(0deg); }
    50% { transform: translateX(120px) rotate(360deg); }
    100% { transform: translateX(-120px) rotate(0deg); }
  }

  .footer-container {
    flex-direction: column;
    gap: 30px;
  }

  .footer-form h2, .footer-why h2 {
    font-size: 24px;
  }

  .footer-why li, .footer-bottom p {
    font-size: 16px;
  }

  .contact-buttons {
    top: 150px;
    right: 10px;
    gap: 15px;
  }

  .contact-button {
    width: 50px;
    height: 50px;
  }

  .contact-button img {
    width: 26px;
    height: 26px;
  }

  .notification-badge {
    font-size: 12px;
    padding: 2px 5px;
  }

  .wrapper {
    flex-direction: column;
    padding: 15px;
  }

  .sidebar {
    width: 100%;
    position: static;
    margin: 20px 0;
  }

  .sidebar ul li a, .contact-box {
    font-size: 16px;
    padding: 10px;
  }

  .tong {
    padding: 15px;
    margin-left: 0;
  }

  .tong h1 {
    font-size: 36px;
  }

  .tong h2 {
    font-size: 28px;
  }

  .tong h4, .tong h5, .tong li, .tong p {
    font-size: 16px;
  }

  .tien, .tong section img, .image-container img, .image-container-anh img {
    width: 100%;
    max-width: 100%;
    margin: 15px auto;
  }

  .bang-gia {
    width: 220px;
    height: 40px;
    font-size: 18px;
    padding: 10px;
  }

  .related-section {
    padding: 30px 15px;
  }

  .related-section h2, .related-section h3 {
    font-size: 28px;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .project-item img {
    width: 100px;
    height: 70px;
  }

  .project-info h4, .project-info .date {
    font-size: 16px;
  }

  .chi-tiet {
    width: 180px;
    height: 35px;
  }

  .chi-tiet p {
    font-size: 16px;
  }

  #video-container {
    /* padding: 30px 15px; */
  }

  #video-container h2 {
    font-size: 28px;
  }

  .video-container {
    max-width: 100%;
  }

  .vidi {
    height: 350px;
  }

  .video-controls button {
    font-size: 16px;
    padding: 8px;
  }

  /* Bỏ nền đen của intro-overlay trên mobile */
  .intro-overlay {
    background-color: transparent; /* Loại bỏ nền đen */
  }
}

@media (max-width: 480px) {
  .intro-logo {
    width: 150px;
    height: 100px;
    margin: 0;
  }

  .slider {
    height: 300px;
  }

  .slide {
    height: 300px;
    width: 100%;
    object-fit: cover;
  }

  .logo-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0px;
    width: 100%;
    flex-wrap: wrap;
  }

  .logo-container {
    width: 35%;
    height: 80px;
  }

  .logo-container img {
    max-height: 80px;
  }

  .banner {
    width: 40%;
    height: 80px;
  }

  .hotline {
    width: 40%;
    font-size: 10px;
    padding: 5px 8px;
  }

  .hotline img {
    width: 14px;
    height: 14px;
  }

  /* Hamburger menu giữ nguyên */
  .hamburger-menu {
    display: flex !important;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    position: fixed;
    top: -10px;
    right: -5px;
    z-index: 999;
  }

  .hamburger-menu span {
    width: 30px;
    height: 5px;
    background: #fff;
    display: block;
  }

  .nav-menu li a {
    font-size: 16px;
    padding: 10px;
  }

  .hero-banner {
    height: 350px;
  }

  .hero-banner img {
    height: 300px;
    width: 100%;
  }

  .info-toggle {
    width: 200px;
    height: 42px;
    font-size: 9px;
    padding: 8px;
  }

  .info-form {
    width: 200px;
    padding: 12px;
  }

  .info-form input, .info-form button, .form-header {
    font-size: 12px;
  }

  .roll-container {
    height: 70px;
    width: 70px;
    margin: 20px auto;
  }

  .roll-text {
    font-size: 24px;
  }

  @keyframes roll {
    0% { transform: translateX(-80px) rotate(0deg); }
    50% { transform: translateX(80px) rotate(360deg); }
    100% { transform: translateX(-80px) rotate(0deg); }
  }

  .contact-buttons {
    top: 870px;
    right: 20px;
    gap: 25px;
    left: 30px;
  }

  .contact-button {
    width: 40px;
    height: 40px;
  }

  .contact-button img {
    width: 22px;
    height: 22px;
  }

  .notification-badge {
    font-size: 10px;
    padding: 2px 4px;
  }

  .tong h1 {
    font-size: 32px;
  }

  .tong h2 {
    font-size: 24px;
  }

  .tong h4, .tong h5, .tong li, .tong p {
    font-size: 14px;
  }

  .tien, .tong section img, .image-container img, .image-container-anh img {
    margin: 10px auto;
  }

  .bang-gia {
    width: 220px;
    height: 35px;
    font-size: 16px;
    padding: 8px;
  }

  .chi-tiet {
    width: 160px;
    height: 30px;
  }

  .chi-tiet p {
    font-size: 14px;
  }

  .vidi {
    height: 250px;
  }

  #video-container h2 {
    font-size: 24px;
  }

  /* Bỏ nền đen của intro-overlay trên mobile */
  .intro-overlay {
    background-color: transparent; /* Loại bỏ nền đen */
  }
}