/* Giao diện gốc (khung ChatGPT) — phần 6/8. Nạp đúng thứ tự trong HTML (file sau ghi đè file trước). */
@media (max-width: 760px) {
  .container {
    width: calc(100% - 32px);
  }
  .topbar {
    font-size: 9px;
  }
  .topbar .container {
    min-height: 30px;
  }
  .nav {
    min-height: 76px;
  }
  .brand img {
    width: 142px;
    height: 52px;
  }
  .menu-button {
    display: flex;
    gap: 7px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: white;
    color: var(--navy);
    padding: 9px 12px;
  }
  .menu-button span {
    font-size: 12px;
  }
  nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: white;
    padding: 10px 24px 20px;
    box-shadow: 0 12px 14px #0001;
  }
  nav.open {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  nav a {
    padding: 12px 0;
  }
  nav a.active:after {
    display: none;
  }
  .hero {
    padding: 40px 0 85px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .hero h1 {
    font-size: 43px;
    max-width: 520px;
  }
  .hero p {
    font-size: 14px;
  }
  .hero .eyebrow {
    font-size: 10px;
  }
  .visual {
    display: none;
  }
  .hero-links {
    gap: 22px;
  }
  .tool-wrap {
    margin-top: -43px;
  }
  .tool-tabs {
    width: 100%;
  }
  .tool-tab {
    flex: 1;
    font-size: 13px;
    padding: 17px 8px;
  }
  .tool-body {
    padding: 22px 18px;
  }
  .tool-intro {
    display: block;
  }
  .tool-intro h3 {
    font-size: 17px;
    margin-bottom: 6px;
  }
  .tracking-form {
    flex-direction: column;
  }
  .quote-grid {
    grid-template-columns: 1fr 1fr;
  }
  .quote-grid > div:first-child {
    grid-column: 1/-1;
  }
  .quote-bottom {
    display: block;
  }
  .quote-bottom .button {
    margin-top: 18px;
    width: 100%;
  }
  .trust-strip {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding-top: 25px;
  }
  .trust-item {
    font-size: 11px;
  }
  .trust-item .icon {
    width: 29px;
    height: 29px;
    font-size: 15px;
  }
  .section {
    padding: 48px 0;
  }
  .section-head {
    display: block;
    margin-bottom: 25px;
  }
  .section-head p,
  .section-head > .text-link {
    margin-top: 17px;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 26px;
  }
  .service-icon {
    margin-bottom: 20px;
  }
  .destinations {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
}