:root {
    --blue: #124d96;
    --navy: #102f58;
    --ink: #17314f;
    --muted: #64758a;
    --pale: #f3f7fc;
    --line: #dce5ee
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px
}

body {
    margin: 0;
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.65
}

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

button {
    font: inherit;
    cursor: pointer
}

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

.wrap {
    width: min(1220px, calc(100% - 80px));
    margin: auto
}

.topbar {
    background: var(--navy);
    color: #fff;
    font-size: 11px;
    letter-spacing: 1.4px;
    padding: 9px 0
}

.topbar .wrap {
    display: flex;
    justify-content: space-between
}

.topbar i {
    display: inline-block;
    height: 9px;
    border-left: 1px solid #ffffff60;
    margin: 0 15px
}

header {
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid var(--line)
}

.header-inner {
    height: 96px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px
}

.brand {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0
}

.brand img {
    width: 91px;
    height: 64px;
    object-fit: contain
}

.brand>span {
    border-left: 1px solid var(--line);
    padding-left: 17px;
    line-height: 1.3
}

.brand b {
    font-size: 21px;
    letter-spacing: -.7px
}

.brand small {
    display: block;
    font-size: 11px;
    letter-spacing: 3px;
    margin-top: 5px
}

nav {
    display: flex;
    gap: 25px;
    font-size: 14px;
    font-weight: 600
}

nav a {
    padding: 35px 0;
    position: relative
}

nav a:hover,
nav a.active {
    color: var(--blue)
}

nav a.active:after {
    content: '';
    position: absolute;
    bottom: 23px;
    left: 0;
    width: 20px;
    height: 2px;
    background: var(--blue)
}

.menu {
    display: none;
    background: transparent;
    border: 0;
    font-size: 26px
}

.hero {
    height: 590px;
    position: relative;
    color: white;
    overflow: hidden
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 50%
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(8, 39, 78, .93), rgba(9, 49, 91, .57) 55%, rgba(10, 52, 88, .06))
}

.hero-content {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0
}

.eyebrow {
    font-size: 12px;
    color: var(--blue);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 17px
}

.eyebrow.light {
    color: #d8e9ff
}

.hero .eyebrow {
    display: flex;
    align-items: center;
    gap: 12px
}

.hero .eyebrow span {
    width: 29px;
    height: 1px;
    background: #b3d7ff
}

h1 {
    font-size: clamp(40px, 4.3vw, 64px);
    line-height: 1.12;
    letter-spacing: -2px;
    margin: 0 0 23px;
    font-weight: 600
}

.hero-title {
    font-size: 22px;
    margin: 0 0 13px
}

.hero-description {
    font-size: 16px;
    color: #dfebf7;
    margin: 0
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 30px
}

.button {
    padding: 12px 23px;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border-radius: 3px;
    border: 1px solid transparent;
    transition: background .2s, transform .2s
}

.button:hover {
    transform: translateY(-2px)
}

.white {
    background: white;
    color: var(--blue)
}

.outline {
    color: white;
    border-color: #ffffff80;
    background: transparent
}

.blue {
    background: var(--blue);
    color: white
}

.blue:hover {
    background: #0b3c79
}

.hero-caption {
    position: absolute;
    right: 40px;
    bottom: 80px;
    font-size: 11px;
    letter-spacing: 2px
}

.hero-caption span {
    display: block;
    text-align: right;
    opacity: .7;
    font-size: 10px
}

.fact-strip {
    position: relative;
    margin-top: -49px;
    z-index: 2;
    background: white;
    box-shadow: 0 12px 35px #1939540c;
    display: grid;
    grid-template-columns: 1fr 1fr 1.15fr;
    padding: 30px 34px;
    border: 1px solid var(--line)
}

.fact-strip>div {
    display: flex;
    gap: 18px;
    align-items: center;
    padding: 0 25px;
    border-right: 1px solid var(--line)
}

.fact-strip>div:first-child {
    padding-left: 0
}

.fact-strip>div:last-child {
    border: 0
}

.fact-symbol {
    font-size: 26px;
    color: #a2b9d4;
    font-weight: 300
}

.fact-strip small {
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--muted);
    display: block
}

.fact-strip strong {
    font-size: 16px;
    display: block;
    margin-top: 3px
}

.section {
    padding-top: 50px;
    padding-bottom: 90px
}

.section a {
    color: blue;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    align-items: flex-end;
    margin-bottom: 38px
}

h2 {
    font-size: 40px;
    line-height: 1.2;
    font-weight: 500;
    letter-spacing: -1.3px;
    margin: 0
}

h3 {
    line-height: 1.3;
    font-weight: 500
}

.section-heading>p {
    max-width: 430px;
    color: var(--muted);
    margin: 0 0 5px
}

.meeting-grid {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 28px
}

.venue-panel {
    padding: 42px;
    background: var(--navy);
    color: white;
    position: relative;
    overflow: hidden
}

.venue-panel h3 {
    font-size: 35px;
    margin: 0 0 15px
}

.venue-panel p {
    font-size: 14px;
    color: #bacee5
}

.venue-address {
    margin: 25px 0;
    font-size: 16px
}

.text-link {
    font-size: 14px;
    border-bottom: 1px solid #8ba7c8;
    padding-bottom: 6px
}

.program-panel {
    padding: 40px;
    border: 1px solid var(--line)
}

.program-panel h3 {
    font-size: 27px;
    margin: 0 0 24px
}

.day {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 19px 0;
    border-top: 1px solid var(--line)
}

.day>span {
    font-size: 38px;
    color: var(--blue);
    font-weight: 300;
    line-height: 1
}

.day b {
    font-size: 14px
}

.day p {
    font-size: 14px;
    margin: 4px 0 0;
    color: var(--muted)
}

.note {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 0
}

.tinted {
    background: var(--pale)
}

.hotel-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 23px
}

.hotel {
    background: white;
    border: 1px solid var(--line);
    padding: 27px;
    display: flex;
    flex-direction: column
}

.hotel-top {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--muted)
}

.hotel-top>span:first-child {
    color: #aa8743;
    font-size: 13px
}

.hotel-logo {
    height: 64px;
    width: 150px;
    object-fit: contain;
    object-position: left;
    margin: 29px 0 21px
}

.hotel-wordmark {
    font-family: Georgia, serif;
    font-size: 27px;
    letter-spacing: 2px;
    line-height: 1.1;
    height: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin: 29px 0 21px
}

.hotel-wordmark small {
    font-size: 13px;
    letter-spacing: 4px;
    margin-top: 5px
}

.hotel h3 {
    font-size: 24px;
    margin: 0 0 16px
}

.hotel p {
    color: var(--muted);
    font-size: 14px;
    margin: 0 0 22px
}

.rate {
    border-top: 1px solid var(--line);
    padding: 18px 0 22px;
    margin-top: auto
}

.rate small {
    font-size: 10px;
    letter-spacing: 1.4px;
    color: var(--muted)
}

.rate b {
    display: block;
    font-size: 34px;
    line-height: 1.3;
    color: var(--blue);
    font-weight: 500
}

.rate b span {
    font-size: 13px;
    color: var(--muted);
    margin-left: 8px
}

.rate b.request-rate {
    font-size: 26px;
    padding-top: 8px
}

.hotel-note {
    margin: 22px 0 0;
    color: var(--muted);
    font-size: 13px
}

.visa-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 110px
}

.visa-section>div>p {
    color: var(--muted);
    margin: 24px 0 28px;
    max-width: 470px
}

.visa-steps>div {
    display: flex;
    gap: 22px;
    padding: 21px 0;
    border-bottom: 1px solid var(--line)
}

.visa-steps>div:first-child {
    padding-top: 0
}

.visa-steps>div>span {
    font-size: 14px;
    color: var(--blue);
    background: var(--pale);
    border-radius: 50%;
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    flex-shrink: 0
}

.visa-steps h3 {
    font-size: 19px;
    margin: 3px 0 10px
}

.visa-steps p {
    margin: 0;
    font-size: 14px;
    color: var(--muted)
}

.discover {
    background: var(--pale)
}

.discovery-tabs {
    display: flex;
    gap: 30px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 30px
}

.discovery-tabs button {
    border: 0;
    background: transparent;
    padding: 0 0 14px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 600
}

.discovery-tabs button[aria-selected=true] {
    color: var(--blue);
    border-bottom: 2px solid var(--blue)
}

.discover-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px
}

.discover-grid article {
    background: #fff
}

.discover-grid img {
    height: 170px;
    width: 100%;
    object-fit: cover
}

.discover-grid article>div {
    padding: 20px
}

.discover-grid small {
    color: var(--blue);
    font-size: 10px;
    letter-spacing: 1.5px
}

.discover-grid h3 {
    font-size: 20px;
    margin: 9px 0
}

.discover-grid p {
    font-size: 14px;
    color: var(--muted);
    margin: 0
}

.about-vietnam {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center
}

.about-vietnam img {
    width: 100%;
    height: 330px;
    object-fit: cover
}

.about-vietnam h3 {
    font-size: 28px;
    margin: 0
}

.about-vietnam p {
    color: var(--muted)
}

[hidden] {
    display: none !important
}

.contact-section {
    padding: 75px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px
}

.contact-section p {
    color: var(--muted);
    font-size: 14px
}

.contact-details {
    border-left: 1px solid var(--line);
    padding-left: 45px
}

.contact-details h3 {
    font-size: 20px;
    margin: 0 0 14px
}

.contact-details a {
    display: block;
    color: var(--blue);
    font-size: 16px;
    line-height: 1.9
}

.contact-details p {
    font-size: 13px
}

footer {
    background: var(--navy);
    color: white
}

.footer-main {
    padding: 38px 0;
    display: flex;
    justify-content: space-between;
    align-items: center
}

.footer-title {
    font-size: 27px;
    font-weight: 700;
    letter-spacing: -.5px
}

.footer-title>span {
    font-weight: 300
}

.footer-title small {
    font-size: 13px;
    font-weight: 400;
    display: block;
    letter-spacing: 0;
    color: #b3c8e1;
    margin-top: 6px
}

.footer-main>a {
    font-size: 14px
}

.footer-bottom {
    border-top: 1px solid #ffffff20;
    padding: 19px 0;
    display: flex;
    justify-content: space-between;
    color: #a6bdd9;
    font-size: 11px
}

dialog {
    width: min(760px, calc(100% - 32px));
    border: 0;
    border-radius: 6px;
    padding: 34px;
    color: var(--ink);
    box-shadow: 0 20px 90px #0004
}

dialog::backdrop {
    background: #082341a8
}

dialog h2 {
    font-size: 27px
}

.dialog-header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 25px
}

.dialog-header button {
    background: var(--pale);
    border: 0;
    border-radius: 50%;
    font-size: 25px;
    width: 36px;
    height: 36px;
    flex-shrink: 0
}

dialog p {
    font-size: 14px;
    color: var(--muted)
}

.table-scroll {
    overflow: auto
}

table {
    border-collapse: collapse;
    width: 100%;
    font-size: 14px
}

th,
td {
    text-align: left;
    padding: 13px;
    border-bottom: 1px solid var(--line)
}

th {
    background: var(--pale);
    font-size: 12px
}

td:last-child {
    white-space: nowrap;
    font-weight: 600;
    color: var(--blue)
}

:focus-visible {
    outline: 3px solid #60adf0;
    outline-offset: 4px
}

@media(min-width:1500px) {
    .hero {
        height: 650px
    }

    .hero-content {
        top: 95px
    }
}

@media(max-width:1100px) {
    .wrap {
        width: calc(100% - 48px)
    }

    nav {
        gap: 15px;
        font-size: 12px
    }

    .brand img {
        width: 75px
    }

    .brand b {
        font-size: 18px
    }

    .fact-strip {
        padding: 24px
    }

    .fact-strip>div {
        padding: 0 15px;
        gap: 12px
    }

    .fact-strip strong {
        font-size: 14px
    }

    .discover-grid {
        grid-template-columns: repeat(2, 1fr)
    }

    .visa-section {
        gap: 55px
    }
}

@media(max-width:800px) {
    .topbar .wrap>span:last-child {
        display: none
    }

    .header-inner {
        height: 80px
    }

    .menu {
        display: block
    }

    nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        padding: 15px 24px;
        border-bottom: 1px solid var(--line);
        flex-direction: column;
        gap: 0
    }

    nav.open {
        display: flex
    }

    nav a {
        padding: 12px 0;
        font-size: 16px
    }

    nav a.active:after {
        display: none
    }

    .hero {
        height: 550px
    }

    .hero-content {
        top: 55px
    }

    h1 {
        font-size: 48px
    }

    .hero-caption {
        bottom: 24px;
        font-size: 9px
    }

    .fact-strip {
        margin-top: 0;
        grid-template-columns: 1fr;
        padding: 10px 24px
    }

    .fact-strip>div,
    .fact-strip>div:first-child {
        border-right: 0;
        border-bottom: 1px solid var(--line);
        padding: 17px 0
    }

    .fact-strip strong {
        font-size: 16px
    }

    .section {
        padding-top: 60px;
        padding-bottom: 60px
    }




    .section-heading {
        display: block;
        margin-bottom: 28px
    }

    .section-heading>p {
        margin-top: 22px
    }

    .meeting-grid,
    .hotel-grid,
    .visa-section,
    .contact-section,
    .about-vietnam {
        grid-template-columns: 1fr
    }

    h2 {
        font-size: 34px
    }

    .hotel-logo {
        margin: 20px 0
    }

    .hotel h3 br {
        display: none
    }

    .hotel-wordmark {
        margin: 20px 0
    }

    .visa-section {
        gap: 35px
    }

    .contact-section {
        gap: 20px;
        padding: 55px 0
    }

    .contact-details {
        padding-left: 0;
        border-left: 0
    }

    .footer-bottom {
        display: block
    }

    .footer-bottom>span {
        display: block
    }

    .footer-bottom>span:last-child {
        margin-top: 8px
    }
}

@media(max-width:480px) {
    .wrap {
        width: calc(100% - 36px)
    }

    .hero {
        height: 530px
    }

    h1 {
        font-size: 39px;
        letter-spacing: -1.5px
    }

    .hero-title {
        font-size: 19px
    }

    .hero-description {
        font-size: 15px
    }

    .hero-actions {
        gap: 10px;
        flex-wrap: wrap
    }

    .button {
        padding: 11px 16px
    }

    .venue-panel,
    .program-panel {
        padding: 27px
    }

    .discover-grid {
        grid-template-columns: 1fr
    }

    .discover-grid img {
        height: 220px
    }

    .discovery-tabs {
        gap: 18px
    }

    .discovery-tabs button {
        font-size: 12px
    }

    .footer-title {
        font-size: 23px
    }

    .footer-main {
        gap: 15px
    }

    dialog {
        padding: 22px
    }

    dialog h2 {
        font-size: 23px
    }
}

@media(prefers-reduced-motion:reduce) {
    html {
        scroll-behavior: auto
    }

    * {
        transition: none !important
    }
}

nav {
    gap: 18px;
    font-size: 13px
}

.nav-group {
    position: relative;
    display: flex;
    align-items: center
}

.nav-parent {
    display: flex;
    align-items: center;
    gap: 4px
}

.dropdown-toggle {
    border: 0;
    background: transparent;
    color: var(--ink);
    padding: 7px 4px;
    font-size: 17px;
    line-height: 1;
    border-radius: 3px
}

.dropdown {
    display: none;
    position: absolute;
    top: 76px;
    left: -16px;
    min-width: 235px;
    background: #fff;
    border: 1px solid var(--line);
    border-top: 3px solid var(--blue);
    box-shadow: 0 12px 35px #102f581c;
    padding: 9px 0;
    z-index: 30
}

.dropdown a {
    display: block;
    padding: 12px 18px;
    font-size: 14px;
    white-space: nowrap
}

.dropdown a:hover {
    background: var(--pale)
}

.dropdown a.active:after {
    display: none
}

.nav-group.expanded .dropdown {
    display: block
}

.page-banner {
    background: var(--pale);
    padding: 44px 0 48px;
    border-bottom: 1px solid var(--line)
}

.breadcrumb {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 23px
}

.breadcrumb a {
    color: var(--blue)
}

.page-banner h1 {
    color: var(--navy);
    font-size: 46px;
    margin: 0;
    letter-spacing: -1.3px
}

.page-banner p {
    margin: 15px 0 0;
    color: var(--muted)
}

.page-narrow {
    max-width: 880px
}

.nav-heading {
    color: var(--blue);
}

.venue-extra {
    margin-top: 30px;
    color: var(--muted)
}

.city-intro {
    padding-top: 0px;
    max-width: 100%;
}

.city-intro p {
    font-size: 18px;
    color: var(--muted)
}

@media(hover:hover) and (min-width:1101px) {
    .nav-group:hover .dropdown {
        display: block
    }
}

@media(max-width:1100px) {
    .header-inner {
        height: 80px
    }

    .menu {
        display: block
    }

    nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 15px 24px;
        border-bottom: 1px solid var(--line);
        flex-direction: column;
        gap: 0;
        max-height: calc(100dvh - 80px);
        overflow: auto
    }

    nav.open {
        display: flex
    }

    nav>a,
    .nav-parent>a {
        padding: 12px 0;
        font-size: 16px
    }

    nav a.active:after {
        display: none
    }

    .nav-group {
        display: block
    }

    .nav-parent {
        justify-content: space-between
    }

    .dropdown-toggle {
        padding: 10px 15px
    }

    .dropdown {
        position: static;
        box-shadow: none;
        border: 0;
        border-left: 2px solid var(--line);
        padding: 0;
        margin: 0 0 12px 10px
    }

    .dropdown a {
        padding: 10px 18px;
        font-size: 15px
    }

    .page-banner h1 {
        font-size: 35px
    }

    .page-banner {
        padding: 35px 0
    }
}

@media(max-width:480px) {
    .page-banner h1 {
        font-size: 30px
    }

    .breadcrumb {
        flex-wrap: wrap
    }
}

/* Dropdown chevron */
.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    margin-left: 2px;
    color: var(--muted);
    border-radius: 50%;
    transition: color .2s, background-color .2s
}

.dropdown-toggle:hover,
.dropdown-toggle:focus-visible {
    color: var(--blue);
    background: var(--pale)
}

.dropdown-chevron {
    display: block;
    transition: transform .2s ease
}

.nav-group.expanded .dropdown-toggle {
    color: var(--blue)
}

.nav-group.expanded .dropdown-chevron {
    transform: rotate(180deg)
}

.nav-parent>a.active~.dropdown-toggle {
    color: var(--blue)
}

@media(hover:hover) and (min-width:1101px) {
    .nav-group:hover .dropdown-toggle {
        color: var(--blue)
    }

    .nav-group:hover .dropdown-chevron {
        transform: rotate(180deg)
    }
}

@media(max-width:1100px) {
    .dropdown-toggle {
        width: 36px;
        height: 36px;
        padding: 0
    }
}

/* Bootstrap reboot (bootstrap-lite.css): giữ khoảng cách đoạn văn / tiêu đề như thiết kế gốc */
.venue-panel p,
.program-panel .note,
.contact-section p,
.about-vietnam p,
.venue-extra p,
.city-intro p,
dialog p {
    margin-top: 1em;
    margin-bottom: 1em
}

.venue-extra h3 {
    font-size: 19px;
    margin: 18px 0
}

/* Venue: ảnh trung tâm hội nghị full width phía trên, thông tin phía dưới */
.venue-showcase {
    display: flex;
    flex-direction: column
}

.venue-photo {
    margin: 0;
    aspect-ratio: 16/9;
    background: var(--pale);
    overflow: hidden
}

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

.venue-showcase .venue-panel {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 20px 48px
}

.venue-showcase .venue-panel h3 {
    margin-bottom: 0
}

.venue-showcase .venue-panel p {
    margin-bottom: 0
}

.venue-showcase .venue-address {
    margin: 0 0 18px
}

.venue-showcase+.venue-extra {
    max-width: 880px
}

@media(max-width:800px) {
    .venue-showcase .venue-panel {
        grid-template-columns: 1fr
    }

    .venue-photo {
        aspect-ratio: 4/3
    }
}