/* ============ VinUni Open Day 2026 — main.css ============ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Montserrat', 'Segoe UI', Arial, sans-serif;
  background: #FFF6E1;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

:root {
  --u: calc(100vw / 1440);
}

.lp {
  position: relative;
}

.band {
  display: block;
  width: 100%;
  height: auto;
}

section {
  position: relative;
}

/* ---------- reveal animation ---------- */
.rv {
  opacity: 0;
  transform: translateY(calc(var(--u) * 30));
  transition: opacity .8s cubic-bezier(.22, 1, .36, 1), transform .8s cubic-bezier(.22, 1, .36, 1);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}

.rv.in {
  opacity: 1;
  transform: translateY(0);
}

.noanim .rv {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}

.d1 {
  --d: .12s;
}

.d2 {
  --d: .24s;
}

.d3 {
  --d: .36s;
}

.d4 {
  --d: .48s;
}

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

  .rv {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ==================== HERO ==================== */
.sec-hero {
  line-height: 0;
}

.nav-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 5;
  pointer-events: none;
}

.nav-pill-img {
  position: absolute;
  left: calc(var(--u) * 106);
  top: 0;
  width: calc(var(--u) * 1229);
  height: calc(var(--u) * 160);
  pointer-events: none;
}

.nav-abs a {
  position: absolute;
  pointer-events: auto;
  font-size: calc(var(--u) * 17);
  font-weight: 600;
  color: #104C89;
  text-align: center;
  line-height: 1.2;
  transition: color .25s, transform .25s;
}

.nav-abs a:hover {
  color: #C83538;
  transform: translateY(-2px);
}

.nav-abs a:nth-of-type(1) {
  left: calc(var(--u) * 851);
  top: calc(var(--u) * 58);
  width: calc(var(--u) * 100);
}

.nav-abs a:nth-of-type(2) {
  left: calc(var(--u) * 967);
  top: calc(var(--u) * 58);
  width: calc(var(--u) * 110);
}

.nav-abs a:nth-of-type(3) {
  left: calc(var(--u) * 1098);
  top: calc(var(--u) * 58);
  width: calc(var(--u) * 96);
}

.nav-abs a:nth-of-type(4) {
  left: calc(var(--u) * 1224);
  top: calc(var(--u) * 58);
  width: calc(var(--u) * 88);
}

.nav-abs .limited {
  display: block;
  margin: calc(var(--u) * 5) auto 0;
  width: fit-content;
  background: #C83538;
  color: #fff;
  font-size: calc(var(--u) * 11);
  font-weight: 600;
  letter-spacing: .04em;
  padding: calc(var(--u) * 2) calc(var(--u) * 10);
  border-radius: calc(var(--u) * 3);
}

.nav-links {
  display: contents;
}

.nav-burger {
  display: none;
}

.hero-abs {
  position: absolute;
  inset: 0;
  z-index: 4;
}

.hero-kicker {
  position: absolute;
  left: calc(var(--u) * 194);
  top: calc(var(--u) * 256);
  width: calc(var(--u) * 449);
  text-align: center;
  font-size: calc(var(--u) * 34);
  font-weight: 800;
  color: #114D89;
  text-transform: uppercase;
  line-height: 1;
}

.hero-title {
  position: absolute;
  left: calc(var(--u) * 126);
  top: calc(var(--u) * 285);
  width: calc(var(--u) * 596);
}

.hero-tag {
  position: absolute;
  left: calc(var(--u) * 78);
  top: calc(var(--u) * 510);
  width: calc(var(--u) * 681);
  white-space: nowrap;
  text-align: center;
  line-height: 1;
  font-size: calc(var(--u) * 30);
  font-weight: 700;
  letter-spacing: .18em;
  text-indent: .18em;
  background: linear-gradient(180deg, #8A6A1F 0%, #C99B3F 45%, #E8C877 70%, #A87F28 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-orn {
  position: absolute;
  left: calc(var(--u) * 256);
  top: calc(var(--u) * 557);
  width: calc(var(--u) * 323);
}

.hero-badges {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.badge {
  position: absolute;
  top: calc(var(--u) * 618);
  height: calc(var(--u) * 42);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: calc(var(--u) * 22);
  font-weight: 800;
  border-radius: calc(var(--u) * 4);
}

.badge-red {
  left: calc(var(--u) * 188);
  width: calc(var(--u) * 195);
  background: #C83538;
}

.badge-blue {
  left: calc(var(--u) * 398);
  width: calc(var(--u) * 251);
  background: #114D89;
}

.hero-btn {
  position: absolute;
  left: calc(var(--u) * 266);
  top: calc(var(--u) * 682);
  width: calc(var(--u) * 299);
  display: block;
  transition: transform .3s, filter .3s;
}

.hero-btn img {
  width: 100%;
}

.hero-btn:hover {
  transform: translateY(calc(var(--u) * -3)) scale(1.03);
  filter: drop-shadow(0 calc(var(--u) * 10) calc(var(--u) * 18) rgba(180, 130, 30, .45));
}

/* ==================== FORM ==================== */
.sec-form {
  line-height: 0;
}

.form-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.form-title {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 66);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 31);
  font-weight: 800;
  color: #fff;
  letter-spacing: .01em;
}

.form-logo {
  position: absolute;
  left: calc(var(--u) * 362);
  top: calc(var(--u) * 123);
  width: calc(var(--u) * 713);
}

.ff {
  position: absolute;
  height: calc(var(--u) * 53);
}

.ff input,
.ff select {
  width: 100%;
  height: 100%;
  border: 0;
  outline: none;
  border-radius: calc(var(--u) * 6);
  background: #fff;
  padding: 0 calc(var(--u) * 20);
  font-family: inherit;
  font-size: calc(var(--u) * 13);
  color: #333;
  transition: box-shadow .25s, transform .25s;
}

.ff input::placeholder {
  color: #A3A3A3;
}

.ff select {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.ff select.empty,
.ff select:invalid {
  color: #A3A3A3;
}

.ff.sel::after {
  content: '';
  position: absolute;
  right: calc(var(--u) * 18);
  top: 50%;
  transform: translateY(-30%);
  border-left: calc(var(--u) * 9) solid transparent;
  border-right: calc(var(--u) * 9) solid transparent;
  border-top: calc(var(--u) * 11) solid #114D89;
  pointer-events: none;
}

.ff input:focus,
.ff select:focus {
  box-shadow: 0 0 0 calc(var(--u) * 3) rgba(120, 190, 255, .55);
}

.f-banla {
  left: calc(var(--u) * 242);
  top: calc(var(--u) * 228);
  width: calc(var(--u) * 307);
}

.f-hoten {
  left: calc(var(--u) * 566);
  top: calc(var(--u) * 228);
  width: calc(var(--u) * 308);
}

.f-sdt {
  left: calc(var(--u) * 893);
  top: calc(var(--u) * 228);
  width: calc(var(--u) * 308);
}

.f-email {
  left: calc(var(--u) * 242);
  top: calc(var(--u) * 295);
  width: calc(var(--u) * 307);
}

.f-namsinh {
  left: calc(var(--u) * 566);
  top: calc(var(--u) * 295);
  width: calc(var(--u) * 308);
}

.f-tinh {
  left: calc(var(--u) * 893);
  top: calc(var(--u) * 295);
  width: calc(var(--u) * 308);
}

.f-lop {
  left: calc(var(--u) * 242);
  top: calc(var(--u) * 463);
  width: calc(var(--u) * 307);
}

.f-htdh {
  left: calc(var(--u) * 566);
  top: calc(var(--u) * 463);
  width: calc(var(--u) * 308);
}

.f-htsdh {
  left: calc(var(--u) * 893);
  top: calc(var(--u) * 463);
  width: calc(var(--u) * 308);
}

.form-quantam {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 374);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 26);
  font-weight: 800;
  color: #fff;
}

.form-checkrow {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 421);
  width: 100%;
  height: calc(var(--u) * 26);
}

.ck-label {
  position: absolute;
  left: calc(var(--u) * 371);
  top: calc(var(--u) * 2);
  font-size: calc(var(--u) * 15);
  font-weight: 500;
  color: #fff;
}

label.ck {
  position: absolute;
  top: 0;
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 9);
  font-size: calc(var(--u) * 15);
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  line-height: calc(var(--u) * 26);
  white-space: nowrap;
}

label.ck:nth-of-type(1) {
  left: calc(var(--u) * 619);
}

label.ck:nth-of-type(2) {
  left: calc(var(--u) * 851);
}

.ck input {
  position: absolute;
  opacity: 0;
}

.ckbox {
  width: calc(var(--u) * 19);
  height: calc(var(--u) * 19);
  background: #fff;
  border-radius: calc(var(--u) * 3);
  position: relative;
  flex: none;
  transition: background .2s;
}

.ck input:checked+.ckbox {
  background: #fff;
}

.ck input:checked+.ckbox::after {
  content: '';
  position: absolute;
  left: calc(var(--u) * 6);
  top: calc(var(--u) * 2);
  width: calc(var(--u) * 5);
  height: calc(var(--u) * 10);
  border: solid #114D89;
  border-width: 0 calc(var(--u) * 2.5) calc(var(--u) * 2.5) 0;
  transform: rotate(45deg);
}

.form-btn {
  position: absolute;
  left: calc(var(--u) * 612);
  top: calc(var(--u) * 546);
  width: calc(var(--u) * 217);
  display: block;
  transition: transform .3s, filter .3s;
}

.form-btn img {
  width: 100%;
  display: block;
}

.form-btn:hover {
  transform: translateY(calc(var(--u) * -2)) scale(1.04);
  filter: drop-shadow(0 calc(var(--u) * 8) calc(var(--u) * 14) rgba(180, 130, 30, .5));
}

.form-btn:active {
  transform: scale(.97);
}

.form-msg {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 596);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 15);
  font-weight: 600;
  color: #BDE3FF;
}

/* ==================== COUNTDOWN ==================== */
.sec-count {
  line-height: 0;
}

.count-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.count-logo {
  position: absolute;
  left: calc(var(--u) * 240);
  top: calc(var(--u) * 48);
  width: calc(var(--u) * 336);
}

.count-logo.d2,
.count-logotext {
  display: none;
}

.cd-city {
  position: absolute;
  text-align: center;
  font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
  font-weight: 700;
  line-height: 1;
  color: #C83538;
  letter-spacing: calc(var(--u) * 1);
  white-space: nowrap;
}

.cd-hcm .cd-city {
  color: #114D89;
}

.cd-addr {
  position: absolute;
  text-align: center;
  font-size: calc(var(--u) * 12);
  font-weight: 700;
  color: #114D89;
  line-height: 1.15;
}

.cd-hn .cd-city {
  left: calc(var(--u) * 770);
  top: calc(var(--u) * 81);
  width: calc(var(--u) * 272);
  font-size: calc(var(--u) * 50);
}

.cd-hn .cd-addr {
  left: calc(var(--u) * 640);
  top: calc(var(--u) * 143);
  width: calc(var(--u) * 537);
}

.cd-hcm .cd-city {
  left: calc(var(--u) * 680);
  top: calc(var(--u) * 338);
  width: calc(var(--u) * 439);
  font-size: calc(var(--u) * 50);
}

.cd-hcm .cd-addr {
  left: calc(var(--u) * 640);
  top: calc(var(--u) * 392);
  width: calc(var(--u) * 537);
}

.cd-timer {
  position: absolute;
  left: calc(var(--u) * 692);
  display: flex;
  align-items: center;
}

.cd-hn .cd-timer {
  top: calc(var(--u) * 178);
}

.cd-hcm .cd-timer {
  top: calc(var(--u) * 443);
}

.cd-box {
  width: calc(var(--u) * 83);
  height: calc(var(--u) * 83);
  background: #114D89;
  border-radius: calc(var(--u) * 10);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 calc(var(--u) * 4) calc(var(--u) * 10) rgba(17, 77, 137, .18);
}

.cd-box b {
  font-size: calc(var(--u) * 30);
  font-weight: 800;
  color: #fff;
  transition: transform .3s;
}

.cd-box b.tick {
  transform: translateY(calc(var(--u) * -6));
}

.cd-timer i {
  font-style: normal;
  font-size: calc(var(--u) * 28);
  font-weight: 800;
  color: #004291;
  width: calc(var(--u) * 31);
  text-align: center;
}

/* ==================== ABOUT ==================== */
.sec-about {
  line-height: 0;
}

.about-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.about-logo {
  position: absolute;
  left: calc(var(--u) * 117);
  top: calc(var(--u) * 617);
  width: calc(var(--u) * 475);
}

.about-text {
  position: absolute;
  left: calc(var(--u) * 727);
  top: calc(var(--u) * 618);
  width: calc(var(--u) * 594);
  font-size: calc(var(--u) * 16);
  font-weight: 500;
  color: #004291;
  line-height: 1.55;
}

.about-text p+p {
  margin-top: calc(var(--u) * 25);
}

.about-note {
  display: none;
}

/* ==================== HOAT DONG + QUYEN LOI ==================== */
.sec-hdql {
  line-height: 0;
}

.hdql-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.hd-title {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 16);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 31);
  font-weight: 800;
  color: #C83538;
}

.act-t {
  position: absolute;
  font-size: calc(var(--u) * 20);
  font-weight: 800;
  color: #FFF6E1;
  line-height: 1.2;
}

.act-t1 {
  left: calc(var(--u) * 154);
  top: calc(var(--u) * 200);
}

.act-t2 {
  left: calc(var(--u) * 759);
  top: calc(var(--u) * 200);
}

.act-t3 {
  left: calc(var(--u) * 154);
  top: calc(var(--u) * 406);
}

.act-t4 {
  left: calc(var(--u) * 760);
  top: calc(var(--u) * 406);
}

.ql-tai {
  position: absolute;
  left: calc(var(--u) * 669);
  top: calc(var(--u) * 948);
  width: calc(var(--u) * 100);
  text-align: center;
  font-size: calc(var(--u) * 30);
  font-weight: 600;
  color: #fff;
}

.ql-t {
  position: absolute;
  font-size: calc(var(--u) * 16);
  font-weight: 600;
  color: #fff;
  line-height: 1.32;
}

.ql-l1 {
  left: calc(var(--u) * 153);
  top: calc(var(--u) * 744);
}

.ql-l2 {
  left: calc(var(--u) * 153);
  top: calc(var(--u) * 865);
}

.ql-l3 {
  left: calc(var(--u) * 149);
  top: calc(var(--u) * 989);
}

.ql-r1,
.ql-r2,
.ql-r3 {
  font-weight: 700;
}

.ql-r1 {
  left: calc(var(--u) * 1058);
  top: calc(var(--u) * 883);
}

.ql-r2 {
  left: calc(var(--u) * 1058);
  top: calc(var(--u) * 1008);
}

.ql-r3 {
  left: calc(var(--u) * 1058);
  top: calc(var(--u) * 1127);
}

/* ==================== HOC THU ==================== */
.sec-hocthu {
  background: #FFF6E1;
  padding-top: calc(var(--u) * 5);
  padding-bottom: calc(var(--u) * 80);
}

.ht-h1 {
  text-align: center;
  font-size: calc(var(--u) * 52);
  font-weight: 800;
  font-style: italic;
  color: #C83538;
  line-height: 1.05;
  transform: translateX(calc(var(--u) * -179));
}

.ht-h2 {
  text-align: center;
  font-size: calc(var(--u) * 52);
  font-weight: 800;
  font-style: italic;
  color: #114D89;
  line-height: 1.05;
  margin-top: calc(var(--u) * -2);
  transform: translateX(calc(var(--u) * 47));
}

.ht-sub {
  margin-top: calc(var(--u) * 12);
  text-align: center;
  font-size: calc(var(--u) * 16);
  font-weight: 600;
  color: #114D89;
  line-height: 1.4;
}

.ht-cards {
  display: flex;
  gap: 15px;
  max-width: 1000px;
  margin: 30px auto 0;
}

.ht-img {
  width: calc((100% - 45px)/4);
  position: relative;
}

.ht-img img {
  position: relative;
  border-radius: 15px;
}

.ht-img:first-child p{
  background: linear-gradient(to bottom, #f6a240, #f6a240e3, #f6a24000);
}
.ht-img:nth-child(2) p{
  background: linear-gradient(to bottom, #118067, #118067e3, #11806700);
}
.ht-img:nth-child(3) p{
  background: linear-gradient(to bottom, #bf123f, #bf123fe0, #bf123f1f);
}
.ht-img:last-child p{
  background: linear-gradient(to bottom, #7da0d1, #7da0d1d6, #7da0d108);
}

.ht-img p {
  position: absolute;
  top: 3px;
  padding: 22px 10px 40px;
  height: 140px;
  border-radius: 15px 15px 0 0;
  text-align: center;
  text-transform: uppercase;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  z-index: 1;
  left: 50%;
  transform: translateX(-50%);
  width: 97.5%;
}

.ht-panel {
  position: relative;
  width: calc(var(--u) * 1200);
  margin: calc(var(--u) * 39) auto 0;
  background: #fff;
  border-radius: calc(var(--u) * 14);
  padding: calc(var(--u) * 12) calc(var(--u) * 121) calc(var(--u) * 52);
}

.ht-panel::before {
  content: '';
  position: absolute;
  left: calc(var(--u) * 524);
  top: calc(var(--u) * -24);
  border-left: calc(var(--u) * 25) solid transparent;
  border-right: calc(var(--u) * 25) solid transparent;
  border-bottom: calc(var(--u) * 25) solid #fff;
}

.ht-table {
  width: 100%;
  border-collapse: collapse;
}

.ht-table th {
  background: #114D89;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  padding: 6px 8px;
  letter-spacing: .02em;
}

.ht-table th.col-name {
  width: 85.4%;
  border-radius: calc(var(--u) * 4) 0 0 calc(var(--u) * 4);
}

.ht-table th.col-time {
  border-radius: 0 calc(var(--u) * 4) calc(var(--u) * 4) 0;
}

.ht-table td {
  font-size: 14px;
  font-weight: 700;
  color: #114D89;
  padding: 8px;
  border-bottom: 1px solid rgba(17, 77, 137, .35);
  line-height: 1.1;
}

.ht-table tr:last-child td {
  border-bottom: 0;
}

.ht-table td:last-child {
  text-align: center;
  white-space: nowrap;
}

/* ==================== HOI THAO ==================== */
.sec-hoithao {
  line-height: 0;
}


  /* ---- HOI THAO ---- */
  .sec-hoithao {
    flex-direction: column;
    background: #FFF6E1;
    padding: 0 0 40px;
    line-height: normal;
  }

  .httt-title {
    position: static;
    text-align: center;
    font-size: clamp(24px, 3.4vw, 34px);
    font-weight: 800;
    color: #C83538;
    padding: 34px 16px 24px;
  }

  .sec-hoithao-box {
    flex: 0 0 100%;
    min-width: 0;
    padding: 34px 40px 26px;
    background: linear-gradient(180deg, #0B4C86 0%, #083D70 100%);
    border-radius: 28px;
    box-shadow: 0 14px 40px rgba(8, 61, 112, .28);
  }

  .sec-hoithao-title {
    margin-bottom: 24px;
  }

  .sec-hoithao-title img {
    display: block;
    margin: 0 auto;
    width: min(720px, 92%);
    height: auto;
  }

  /* ---- slider (cấp box: box1 = slide 1, box2 = slide 2) ---- */
  .ht-slider {
    position: relative;
    width: min(1360px, 94vw);
    margin: 0 auto;
  }

  .ht-viewport {
    overflow: hidden;
  }

  .ht-slide-track {
    display: flex;
    align-items: flex-start;
    transition: transform .55s cubic-bezier(.22, 1, .36, 1);
    will-change: transform;
  }

  .sec-hoithao-content {
    display: flex;
    gap: 20px;
  }

  .sec-hoithao-item {
    flex: 1 1 0;
    min-width: 0;
  }

  .sec-hoithao-img {
    position: relative;
  }

  .sec-hoithao-img img {
    display: block;
    position: relative;
    width: 100%;
    height: auto;
  }

  .sec-hoithao-text {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 46px 24px 22px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    line-height: 1.28;
    background: linear-gradient(180deg, rgba(8, 61, 112, 0) 0%, rgba(8, 61, 112, .55) 42%, rgba(6, 44, 82, .94) 100%);
    border-radius: 0 0 18px 18px;
  }

  .ht-name {
    text-shadow: 0 1px 3px rgba(0, 0, 0, .35);
  }

  .sec-hoithao-text hr {
    width: 100px;
    height: 3px;
    border: 0;
    background: #fff;
    margin: 14px 0;
    opacity: .9;
  }

  .sec-hoithao-time {
    display: flex;
    gap: 40px;
  }

  .sec-hoithao-time p {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
  }

  .sec-hoithao-time span {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    opacity: .85;
  }

  .sec-hoithao-time strong {
    font-size: 17px;
    font-weight: 800;
  }

  /* arrows */
  .ht-arrow {
    position: absolute;
    top: 44%;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .14);
    color: #fff;
    font-size: 30px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 4px;
    transition: background .25s, opacity .25s;
    z-index: 3;
  }

  .ht-arrow:hover {
    background: rgba(255, 255, 255, .3);
  }

  .ht-prev {
    left: -12px;
  }

  .ht-next {
    right: -12px;
  }

  .ht-arrow[disabled] {
    opacity: 0;
    pointer-events: none;
  }

  /* dots */
  .ht-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 22px;
  }

  .ht-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(17, 77, 137, .28);
    transition: background .25s, width .25s;
  }

  .ht-dot.active {
    width: 26px;
    border-radius: 6px;
    background: #114D89;
  }

  .ht-dots:empty {
    display: none;
  }

  /* card-level slider controls (chỉ hiện trên mobile) */
  .sec-hoithao-box { position: relative; }
  .ht-cvp { overflow: visible; }
  .ht-carrow,
  .ht-cdots { display: none; }

  /* responsive: tablet giữ 3/4 card 1 hàng; mobile <=860 mỗi box là 1 slider từng card */
  @media (max-width: 1023px) {
    .sec-hoithao-box { padding: 26px 26px 22px; }
  }

  @media (max-width: 860px) {
    .ht-slider { width: 100%; }
    /* outer: xếp 2 box dọc, tắt slide cấp box */
    .ht-viewport { overflow: visible; }
    .ht-slide-track { flex-direction: column; transform: none !important; gap: 18px; }
    .ht-arrow, .ht-dots { display: none; }

    .sec-hoithao-box { flex: 0 0 auto; width: 100%; padding: 20px 16px 18px; border-radius: 20px; }
    .sec-hoithao-title { margin-bottom: 14px; }
    .sec-hoithao-title img { width: 96%; }

    /* mỗi box = slider từng card (1 card/view) */
    .ht-cvp { overflow: hidden; }
    .sec-hoithao-content { flex-direction: row; gap: 0; }
    .sec-hoithao-item { flex: 0 0 100%; min-width: 0; }
    .sec-hoithao-text { padding: 44px 18px 16px; font-size: 14px; line-height: 1.28; border-radius: 0 0 14px 14px; }
    .ht-name { font-size: 14px; font-weight: 700; }
    .sec-hoithao-text hr { width: 90px; height: 2px; margin: 12px 0; }
    .sec-hoithao-time { flex-direction: row; gap: 26px; }
    .sec-hoithao-time span { font-size: 10px; }
    .sec-hoithao-time strong { font-size: 15px; }

    /* controls riêng từng box */
    .ht-carrow {
      display: flex; position: absolute; top: 50%; transform: translateY(-50%);
      width: 34px; height: 34px; border-radius: 50%; border: 0; cursor: pointer;
      background: rgba(255, 255, 255, .16); color: #fff; font-size: 24px; line-height: 1;
      align-items: center; justify-content: center; padding-bottom: 3px; z-index: 3;
    }
    .ht-carrow[disabled] { opacity: 0; pointer-events: none; }
    .ht-cprev { left: 6px; }
    .ht-cnext { right: 6px; }
    .ht-cdots { display: flex; justify-content: center; gap: 8px; margin-top: 14px; }
    .ht-cdots .ht-dot { background: rgba(255, 255, 255, .4); }
    .ht-cdots .ht-dot.active { background: #fff; }
  }

/* ==================== XUYEN SUOT ==================== */
.sec-xs {
  line-height: 0;
}

.xs-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.xs-title {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 55);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 31);
  font-weight: 800;
  color: #114D89;
}

.xs-t {
  position: absolute;
  color: #fff;
}

.xs-h {
  font-size: calc(var(--u) * 21);
  font-weight: 800;
  line-height: 1.3;
}

.xs-s {
  font-size: calc(var(--u) * 16);
  font-weight: 500;
  line-height: 1.35;
  margin-top: calc(var(--u) * 9);
}

.xs-t1 {
  left: calc(var(--u) * 302);
  top: calc(var(--u) * 172);
}

.xs-t2 {
  left: calc(var(--u) * 600);
  top: calc(var(--u) * 408);
  width: calc(var(--u) * 555);
  text-align: right;
}

.xs-t3 {
  left: calc(var(--u) * 301);
  top: calc(var(--u) * 620);
}

.xs-t4 {
  left: calc(var(--u) * 500);
  top: calc(var(--u) * 833);
  width: calc(var(--u) * 655);
  text-align: right;
}

/* ==================== CAMPUS TOUR ==================== */
.sec-campus {
  line-height: 0;
  background: url('images/back6.jpg') center 0 no-repeat;
  background-size: cover;
  padding: 30px 0;
}

.campus-abs {
  text-align: center;
}

.campus-title {
  width: calc(var(--u) * 747);
}

.campus-sub {
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 31);
  font-weight: 800;
  color: #114D89;
  line-height: 1.35;
}

.campus-sub span {
  color: #C83538;
}

.campus-text {
  width: calc(var(--u) * 954);
  text-align: center;
  font-size: calc(var(--u) * 16);
  font-weight: 500;
  color: #004291;
  line-height: 1.55;
  margin: 20px auto 20px;
}

.campus-link {
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 16);
  font-weight: 600;
  color: #004291;
}

.campus-link a {
  border-bottom: 1px solid transparent;
  transition: border-color .25s, color .25s;
  text-decoration: underline;
}

.campus-link a:hover {
  color: #C83538;
}

.sec-campus-box {
  width: min(1200px, 92vw);
  margin: 30px auto 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sec-campus-top {
  display: grid;
  gap: 20px;
  height: clamp(220px, 21vw, 300px);
}

.sec-campus-top.row1 {
  grid-template-columns: 3fr 1fr 1fr;
}

.sec-campus-top.row2 {
  grid-template-columns: 1fr 1fr 3fr;
}

.sec-campus-top img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 10px;
}

/* ==================== UU DAI ==================== */
.sec-uudai {
  line-height: 0;
}

.uudai-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.ud-title {
  position: absolute;
  left: calc(var(--u) * 166);
  top: calc(var(--u) * 99);
  width: calc(var(--u) * 500);
}

.ud-sub {
  position: absolute;
  left: calc(var(--u) * 195);
  top: calc(var(--u) * 324);
  font-size: calc(var(--u) * 17);
  font-weight: 600;
  color: #fff;
}

.ud-card {
  position: absolute;
  left: calc(var(--u) * 174);
  top: calc(var(--u) * 389);
  width: calc(var(--u) * 482);
  height: calc(var(--u) * 148);
}

.ud-card-h {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 18);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 17);
  font-weight: 600;
  color: #fff;
}

.ud-money {
  position: absolute;
  left: calc(var(--u) * 38);
  top: calc(var(--u) * 16);
  width: calc(var(--u) * 409);
}

.ud-card-f {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 96);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 13.5);
  font-weight: 600;
  color: #fff;
  line-height: 1.25;
}

/* ==================== VE VINUNI ==================== */
.sec-vinuni {
  line-height: 0;
}

.vn-abs {
  position: absolute;
  inset: 0;
  line-height: normal;
  z-index: 4;
}

.vn-band {
  display: contents;
}

.vn-title {
  position: absolute;
  left: calc(var(--u) * 672);
  top: calc(var(--u) * 78);
  width: calc(var(--u) * 578);
}

.vn-text {
  position: absolute;
  left: calc(var(--u) * 670);
  top: calc(var(--u) * 311);
  width: calc(var(--u) * 592);
  font-size: calc(var(--u) * 16);
  font-weight: 500;
  color: #004291;
  line-height: 1.45;
}

.vn-text p+p {
  margin-top: calc(var(--u) * 22);
}

.vn-quality {
  position: absolute;
  left: 0;
  top: calc(var(--u) * 1101);
  width: 100%;
  text-align: center;
  font-size: calc(var(--u) * 31);
  font-weight: 800;
  color: #114D89;
  line-height: 1.2;
}

.vn-quality span {
  color: #C83538;
}

.vn-cert {
  position: absolute;
  height: calc(var(--u) * 123);
}

.vn-cert p {
  position: absolute;
  left: calc(var(--u) * 155);
  top: 50%;
  transform: translateY(-50%);
  width: calc(var(--u) * 276);
  font-size: calc(var(--u) * 14);
  font-weight: 500;
  color: #004291;
  line-height: 1.3;
}

.vn-cert-1 {
  left: calc(var(--u) * 240);
  top: calc(var(--u) * 1198);
  width: calc(var(--u) * 472);
}

.vn-cert-2 {
  left: calc(var(--u) * 727);
  top: calc(var(--u) * 1198);
  width: calc(var(--u) * 471);
}

.vn-cert-3 {
  left: calc(var(--u) * 240);
  top: calc(var(--u) * 1332);
  width: calc(var(--u) * 472);
}

.vn-cert-4 {
  left: calc(var(--u) * 727);
  top: calc(var(--u) * 1332);
  width: calc(var(--u) * 471);
}

.vn-cert-5 {
  left: calc(var(--u) * 484);
  top: calc(var(--u) * 1470);
  width: calc(var(--u) * 472);
}

.vn-cert-5 p {
  left: calc(var(--u) * 145);
  width: calc(var(--u) * 286);
}

/* ==================== VIDEO ==================== */
.sec-video {
  background: #FFF6E1;
  padding-bottom: calc(var(--u) * 92);
}

.video-box {
  display: block;
  width: calc(var(--u) * 964);
  height: calc(var(--u) * 544);
  margin: 0 auto;
  margin-top: calc(var(--u) * -77);
  background: #000 url('images/video-thumb.png') center / cover no-repeat;
  border-radius: calc(var(--u) * 6);
  position: relative;
  z-index: 5;
  cursor: pointer;
}

.video-box::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--u) * 90);
  height: calc(var(--u) * 63);
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, .12);
  border-radius: calc(var(--u) * 14);
  transition: background .3s;
}

.video-box::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-42%, -50%);
  border-left: calc(var(--u) * 30) solid rgba(255, 255, 255, .85);
  border-top: calc(var(--u) * 18) solid transparent;
  border-bottom: calc(var(--u) * 18) solid transparent;
  z-index: 2;
  transition: border-left-color .3s;
}

.video-box:hover::after {
  background: rgba(255, 255, 255, .22);
}

.video-box:hover::before {
  border-left-color: #fff;
}

/* ==================== FAQ ==================== */
.sec-faq {
  background: #FFF6E1;
  padding: 0 0 calc(var(--u) * 0);
}

.band-abs {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
  z-index: 0;
}

.sec-faq>*,
.sec-footer>* {
  position: relative;
  z-index: 1;
}

.sec-faq>.band-abs,
.sec-footer>.band-abs {
  position: absolute;
  z-index: 0;
}

.faq-title {
  text-align: center;
  font-size: calc(var(--u) * 51);
  font-weight: 800;
  color: #C83538;
  padding-top: 0;
}

.faq-list {
  width: calc(var(--u) * 602);
  margin: calc(var(--u) * 57) auto calc(var(--u) * -30);
}

.faq-item {
  border-bottom: 1px solid #114D89;
}

.faq-item.last {
  border-bottom: 0;
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 16);
  text-align: left;
  font-size: calc(var(--u) * 16);
  font-weight: 600;
  color: #114D89;
  line-height: 1.5;
  padding: calc(var(--u) * 26) 0;
  transition: color .25s;
}

.faq-q:hover {
  color: #C83538;
}

.faq-arrow {
  flex: none;
  width: 0;
  height: 0;
  border-left: calc(var(--u) * 9) solid transparent;
  border-right: calc(var(--u) * 9) solid transparent;
  border-top: calc(var(--u) * 12) solid #114D89;
  transition: transform .4s cubic-bezier(.22, 1, .36, 1);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .5s cubic-bezier(.22, 1, .36, 1);
}

.faq-a p {
  font-size: calc(var(--u) * 14);
  font-weight: 500;
  color: #004291;
  line-height: 1.65;
  padding-bottom: calc(var(--u) * 22);
}

/* ==================== FOOTER ==================== */
.sec-footer {
  background: #114D89;
  height: calc(var(--u) * 326);
  position: relative;
}

.ft-logos {
  position: absolute;
  left: calc(var(--u) * 124);
  top: calc(var(--u) * 98);
  height: calc(var(--u) * 126);
  width: auto;
}

.ft-contact {
  position: absolute;
  left: calc(var(--u) * 849);
  top: calc(var(--u) * 76);
}

.ft-contact h3 {
  font-size: calc(var(--u) * 15);
  font-weight: 800;
  color: #fff;
  margin-bottom: calc(var(--u) * 16);
}

.ft-grid {
  display: grid;
  grid-template-columns: auto auto;
  column-gap: calc(var(--u) * 203);
  row-gap: calc(var(--u) * 20);
}

.ft-row {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 11);
  font-size: calc(var(--u) * 13);
  font-weight: 400;
  color: #fff;
  transition: opacity .25s;
}

.ft-row:hover {
  opacity: .8;
}

.ft-row img {
  width: calc(var(--u) * 27);
  height: calc(var(--u) * 27);
}

/* ==================== FLOATING CTA ==================== */
.floating-cta {
  position: fixed;
  right: calc(var(--u) * 60);
  bottom: calc(var(--u) * 55);
  width: calc(var(--u) * 351);
  z-index: 90;
  opacity: 0;
  transform: translateY(calc(var(--u) * 40));
  pointer-events: none;
  transition: opacity .45s cubic-bezier(.22, 1, .36, 1), transform .45s cubic-bezier(.22, 1, .36, 1);
  width: 240px;
}

.floating-cta.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.floating-cta img {
  width: 100%;
  display: block;
  filter: drop-shadow(0 calc(var(--u) * 8) calc(var(--u) * 20) rgba(0, 0, 0, .3));
  transition: transform .3s;
}

.floating-cta:hover img {
  transform: scale(1.04);
}

/* Nút "Đăng ký ngay": đập nhẹ + phát sáng để thu hút ánh nhìn */
@keyframes cta-beat {
  0%,
  45%,
  100% {
    transform: scale(1);
  }

  10% {
    transform: scale(1.08);
  }

  20% {
    transform: scale(0.97);
  }

  30% {
    transform: scale(1.05);
  }

  40% {
    transform: scale(1);
  }
}

@keyframes cta-glow {

  0%,
  45%,
  100% {
    filter: drop-shadow(0 calc(var(--u) * 8) calc(var(--u) * 20) rgba(0, 0, 0, .3));
  }

  20% {
    filter: drop-shadow(0 calc(var(--u) * 8) calc(var(--u) * 20) rgba(0, 0, 0, .3)) drop-shadow(0 0 16px rgba(255, 196, 0, .9));
  }
}

.floating-cta.show img {
  transform-origin: center;
  animation: cta-beat 2.6s cubic-bezier(.36, .07, .19, .97) .6s infinite,
    cta-glow 2.6s cubic-bezier(.36, .07, .19, .97) .6s infinite;
}

/* Khi người dùng trỏ chuột thì dừng nhịp đập, chuyển sang phóng to tĩnh */
.floating-cta.show:hover img {
  animation: none;
  transform: scale(1.07);
}

.nav-img {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .floating-cta.show img {
    animation: none;
  }
}

.noanim .floating-cta.show img {
  animation: none;
}

@media (max-width: 1400px) {
  .ht-cards {
    max-width: 100%;
    width: 84%;
  }
}

/* ============================================================
   MOBILE — ≤ 860px: chuyển sang layout dọc
   ============================================================ */
@media (max-width: 860px) {
  .band {
    width: 100%;
  }

  /* ---- HERO ---- */
  .sec-hero {
    position: relative;
    display: block;
    background: url('images/back1-mb.jpg') top center / 100% auto no-repeat #FDF3DC;
    aspect-ratio: 440 / 1030;
    padding: 0 12px 0;
    line-height: normal;
  }

  .sec-hero>.band {
    display: none;
  }

  .nav-abs {
    position: relative;
    z-index: 5;
  }

  .nav-abs {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: rgba(255, 255, 255, .92);
    border-radius: 0 0 16px 16px;
    padding: 18px 14px;
    box-shadow: 0 4px 14px rgba(17, 60, 110, .10);
    pointer-events: auto;
  }

  /* Lướt lên: nav dính cố định đầu trang; lướt xuống: ẩn về vị trí thường */
  .nav-abs.pinned {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    height: 81px;
    z-index: 60;
    background: rgba(255, 255, 255, .97);
    animation: nav-drop .32s ease;
  }

  @keyframes nav-drop {
    from { transform: translateY(-100%); }
    to   { transform: translateY(0); }
  }

  @media (prefers-reduced-motion: reduce) {
    .nav-abs.pinned { animation: none; }
  }

  .nav-abs img {
    height: 45px;
  }

  .nav-img {
    display: flex;
    align-items: center;
    gap: 12px;

  }

  .nav-pill-img {
    display: block;
    position: static;
    width: auto;
    height: 34px;
  }

  .nav-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 34px;
    height: 34px;
    padding: 6px;
    background: none;
    border: 0;
    cursor: pointer;
    pointer-events: auto;
  }

  .nav-burger span {
    display: block;
    width: 22px;
    height: 2.5px;
    border-radius: 2px;
    background: #114D89;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 2px;
    background: #fff;
    border-radius: 14px;
    padding: 8px;
    box-shadow: 0 12px 30px rgba(17, 60, 110, .18);
    z-index: 30;
  }

  .nav-abs.open .nav-links {
    display: flex;
  }

  .nav-links a {
    position: static;
    width: auto !important;
    font-size: 14px;
    text-align: left;
    padding: 9px 10px;
    border-bottom: 1px solid rgba(17, 77, 137, .10);
  }

  .nav-links a:last-child {
    border-bottom: 0;
  }

  .nav-abs .limited {
    display: inline-block;
    font-size: 9px;
    margin: 2px 0 0 6px;
    padding: 1px 7px;
  }

  .hero-abs {
    position: absolute;
    inset: 0;
    pointer-events: none;
  }

  .hero-kicker,
  .hero-title,
  .hero-tag,
  .hero-orn,
  .hero-badges {
    display: none;
  }

  .hero-btn {
    position: absolute;
    top: 42%;
    left: 26%;
    width: 48%;
    height: 7.8%;
    pointer-events: auto;
  }

  .hero-btn img {
    display: none;
  }

  /* ---- FORM ---- */
  .sec-form {
    background: linear-gradient(180deg, #f1e4cf 0%, #fff6e1 100%);
    padding: 0 12px 10px;
    line-height: normal;
  }

  .sec-form>.band {
    display: none;
  }

  .form-abs {
    position: static;
    background: url('images/back-form-mb.jpg') center top / 100% 100% no-repeat;
    border-radius: 25px;
    padding: 26px 16px 30px;
  }

  .form-title {
    position: static;
    font-size: clamp(17px, 4.6vw, 22px);
  }

  .form-logo {
    position: static;
    display: block;
    width: min(230px, 58%);
    margin: 10px auto 0;
  }

  .ff {
    position: static;
    width: 100%;
    height: 46px;
    margin-top: 10px;
  }

  .ff input,
  .ff select {
    font-size: 13px;
    border-radius: 8px;
    padding: 0 14px;
  }

  .ff.sel::after {
    right: 14px;
    border-left-width: 7px;
    border-right-width: 7px;
    border-top-width: 9px;
  }

  .form-quantam {
    position: static;
    margin-top: 20px;
    font-size: clamp(15px, 4vw, 19px);
  }

  .form-checkrow {
    position: static;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-top: 12px;
    padding: 0 6px;
  }

  .ck-label {
    position: static;
    font-size: 13px;
  }

  label.ck {
    position: static;
    font-size: 13px;
  }

  .ckbox {
    width: 17px;
    height: 17px;
  }

  .ck input:checked+.ckbox::after {
    left: 5px;
    top: 1px;
    width: 5px;
    height: 9px;
    border-width: 0 2px 2px 0;
  }

  .form-btn {
    position: static;
    display: block;
    width: min(220px, 60%);
    margin: 20px auto 0;
  }

  .form-msg {
    position: static;
    margin-top: 12px;
    font-size: 13px;
  }

  /* ---- COUNTDOWN ---- */
  .sec-count {
    background: #FFF6E1;
    padding: 26px 14px 30px;
    line-height: normal;
  }

  .sec-count>.band {
    display: none;
  }

  .count-abs {
    position: static;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .count-logo {
    position: static;
    width: min(300px, 72%);
    margin-top: 8px;
  }

  .count-logo.d2 {
    display: block;
  }
  .count-logo.d1 {
    display: none;
  }
  .count-logotext {
    display: block;
    text-align: center;
    color: #004291;
    font-size: 26px;
    font-weight: 800;
    text-transform: uppercase;
    margin-bottom: 2px;
  }

  .cd {
    position: static;
    width: min(430px, 100%);
    background: linear-gradient(180deg, #f0ddbc 0%, #f7e3be99 100%);
    border-radius: 16px;
    padding: 18px 14px 20px;
    margin-top: 25px;
    box-shadow: 0 6px 18px rgba(140, 100, 20, .12);
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .cd-city {
    position: static;
    width: auto !important;
    margin-top: 10px;
    font-size: clamp(30px, 7.6vw, 38px);
  }

  .cd-hn .cd-city,
  .cd-hcm .cd-city {
    font-size: 32px;
  }
  

  .cd-addr {
    position: static;
    width: auto !important;
    margin-top: 8px;
    font-size: 12.5px;
    line-height: 1.30;
  }

  .cd-addr br {
    display: none;
  }

  .cd-timer {
    position: static;
    margin-top: 14px;
  }

  .cd-box {
    width: 56px;
    height: 56px;
    border-radius: 8px;
  }

  .cd-box b {
    font-size: 21px;
  }

  .cd-timer i {
    font-size: 19px;
    width: 20px;
  }

  /* ---- ABOUT ---- */
  .sec-about {
    line-height: normal;
    background: url('images/back2-mb.jpg') top center / 100% auto no-repeat #FFF6E1;
    padding-bottom: 20px;
  }

  .sec-about>.band {
    display: none;
  }

  .about-abs {
    position: static;
    padding: 80vw 16px 8px;
  }

  .about-logo {
    position: static;
    width: min(360px, 85%);
    margin-top: 14px;
  }

  .about-text {
    position: static;
    width: auto;
    margin-top: 18px;
    font-size: 14.5px;
  }

  .about-text p+p {
    margin-top: 14px;
  }

  .about-note {
    display: block;
    position: relative;
    margin: 23px 4px 12px;
  }

  .an-stic {
    display: block;
    width: 46%;
    max-width: 168px;
    margin: 0 auto -48px;
    position: relative;
    z-index: 2;
  }

  .an-paper {
    position: relative;
    z-index: 9;
    background: #FBFCFE;
    border-radius: 8px;
    padding: 20px;
    transform: rotate(-1.4deg);
    box-shadow: 0 12px 26px rgba(8, 61, 112, .18);
  }

  .an-paper p {
    font-style: italic;
    font-size: 13px;
    line-height: 1.55;
    color: #33475f;
  }

  .an-paper p+p {
    margin-top: 12px;
  }

  .an-sign {
    color: #8a97a8;
  }

  /* ---- HOAT DONG + QUYEN LOI ---- */
  .sec-hdql {
    background: url('images/back3-mb.jpg') top center / 100% auto no-repeat #FFF6E1;
    padding: 14px 14px 0;
    line-height: normal;
    background-position-y: -75px;
  }

  .sec-hdql>.band {
    display: none;
  }

  .hdql-abs {
    position: static;
  }

  .act-t,
  .ql-t,
  .ql-tai {
    display: none;
  }

  .hd-title {
    position: static;
    font-size: clamp(19px, 5vw, 24px);
  }

  .m-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 18px;
  }

  .m-grid.one {
    grid-template-columns: 1fr;
  }

  .m-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
  }

  .m-card img {
    display: block;
    width: 100%;
  }

  .m-card p {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 10px;
    font-size: 15px;
    font-weight: 600;
    color: #FFF6E1;
    line-height: 1.35;
  }

  .hd-title.rv {
    display: flex;
    justify-content: center;
    flex-direction: column;
  }

  .hd-title.rv span {
    color: #004291;
  }

  .m-card.mid {
    height: 128px;
  }

  .m-card.mid img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .m-card.mid::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(90deg, #0B4C86 0%, #0B4C86 50%, rgba(11, 76, 134, .92) 58%, rgba(11, 76, 134, 0) 74%);
  }

  .m-card.mid:nth-child(even)::before {
    background: linear-gradient(270deg, #0B4C86 0%, #0B4C86 50%, rgba(11, 76, 134, .92) 58%, rgba(11, 76, 134, 0) 74%);
  }

  .m-card.mid p {
    position: absolute;
    z-index: 2;
    left: 16px;
    right: 44%;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    text-align: left;
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    line-height: 1.3;
  }

  .m-card.mid:nth-child(even) p {
    left: 44%;
    right: 16px;
    text-align: right;
  }

  .m-benefit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: none;
    margin: 0;
    padding: 0 4px 40px;
  }

  .m-benefit .b-title,
  .m-benefit .b-title2,
  .m-benefit .b-tai {
    display: none;
  }

  .m-pills {
    order: 4;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 108vw;
  }

  .m-pill {
    position: relative;
    background: linear-gradient(90deg, #1B87EE 0%, #0B4E96 100%);
    color: #fff;
    font-size: 13.5px;
    font-weight: 600;
    line-height: 1.35;
    border-radius: 8px;
    padding: 12px 14px 12px 42px;
  }

  .m-pill::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 14px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 11px solid #C83538;
  }

  /* ---- HOC THU ---- */
  .sec-hocthu {
    padding: 30px 14px 0;
  }

  .ht-h1 {
    transform: none;
    font-size: clamp(30px, 8.6vw, 34px);
  }

  .ht-h2 {
    transform: none;
    margin-top: 0;
    font-size: clamp(30px, 8.6vw, 34px);
  }

  .ht-sub {
    font-size: 13.5px;
  }

  .ht-cards {
    width: 100%;
    height: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
  }

  .ht-img {
    width: 100%;
  }

  .ht-cards img {
    position: static;
    width: 100%;
  }

  .ht-img p {
    height: auto;
    padding: 14px 8px 50px;
    font-size: clamp(12px, 3.4vw, 16px);
    border-radius: 10px 10px 0 0;
  }

  .ht-panel {
    display: none;
  }


  /* ---- XUYEN SUOT ---- */
  .sec-xs {
    background: #FFF6E1;
    padding: 34px 14px 0;
    line-height: normal;
  }

  .sec-xs>.band {
    display: none;
  }

  .xs-abs {
    position: static;
  }

  .xs-t {
    display: none;
  }

  .xs-title {
    position: static;
    font-size: clamp(19px, 5vw, 24px);
  }

  /* ---- CAMPUS ---- */
  .sec-campus {
    background: url('images/back4-mb.jpg') top center / 100% 100% no-repeat #FFF6E1;
    padding: 30px 14px 40px;
    line-height: normal;
  }

  .sec-campus>.band {
    display: none;
  }

  .campus-title {
    position: static;
    width: min(560px, 92%);
  }

  .campus-sub {
    position: static;
    width: auto;
    font-size: clamp(18px, 5vw, 24px);
    margin-top: 14px;
  }

  .campus-text {
    position: static;
    width: auto;
    font-size: 14.5px;
    margin-top: 14px;
  }

  .campus-link {
    position: static;
    width: auto;
    margin-top: 10px;
    font-size: 14px;
  }

  .sec-campus-box {
    width: 100%;
    margin-top: 20px;
    gap: 12px;
  }

  .sec-campus-top {
    grid-template-columns: 1fr 1fr;
    height: auto;
    gap: 12px;
  }

  .sec-campus-top.row1,
  .sec-campus-top.row2 {
    grid-template-columns: 1fr 1fr;
  }

  .sec-campus-top img {
    width: 100%;
    height: 170px;
    object-fit: cover;
    border-radius: 8px;
  }

   .sec-campus-top.row1 img:first-child {
    order: 3;
    grid-column: 1 / -1;
    height: auto;
   }

  .sec-campus-top.row1 img:nth-child(2) {
    order: 1;
  }

  .sec-campus-top.row1 img:nth-child(3) {
    order: 2;
  }
  .sec-campus-top.row2 img:last-child {
    display: none;
  }

  /* ---- UU DAI ---- */
  .sec-uudai {
    position: relative;
    aspect-ratio: 440 / 742;
    background: url('images/back5-mb.jpg') top center / 100% auto no-repeat #083D70;
    padding: 0 16px 34px;
    line-height: normal;
  }

  .sec-uudai>.band {
    display: none;
  }

  .uudai-abs {
    position: static;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .ud-title,
  .ud-sub,
  .ud-gifts {
    display: none;
  }

  .ud-card {
    position: static;
    width: min(430px, 100%);
    height: auto;
    background: #C83538;
    border-radius: 14px;
    margin-top: 121vw;
    padding: 16px 14px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .ud-card-h {
    position: static;
    font-size: 15px;
  }

  .ud-money {
    position: static;
    width: min(330px, 84%);
    margin-top: 4px;
  }

  .ud-card-f {
    position: static;
    margin-top: 4px;
    font-size: 12.5px;
  }

  /* ---- VE VINUNI ---- */
  .sec-vinuni {
    background: #FFF6E1;
    padding: 34px 16px 0;
    line-height: normal;
  }

  .sec-vinuni>.band {
    display: none;
  }

  .vn-abs {
    position: static;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .vn-title {
    position: static;
    width: min(430px, 84%);
    margin-top: 8px;
  }

  .vn-text {
    position: static;
    width: auto;
    margin-top: 16px;
    font-size: 14.5px;
  }

  .vn-text p+p {
    margin-top: 12px;
  }

  .vn-cert {
    display: none;
  }

  .vn-band {
    display: block;
    width: calc(100% + 32px);
    background: url('images/back6-mb.jpg') top center / 100% auto no-repeat #083D70;
    margin: 22px -16px 0;
    padding: 0 16px 44px;
  }

  .vn-photo {
    display: none;
  }

  .vn-quality {
    position: static;
    margin-top: 111vw;
    font-size: clamp(18px, 5vw, 23px);
    color: #fff;
    line-height: 1.4;
  }

  .m-certs {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    margin-top: 16px;
  }

  .m-cert {
    background: #fff;
    border-radius: 12px;
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: 0 4px 14px rgba(17, 60, 110, .08);
  }

  .m-cert img {
    width: 52px;
    flex: none;
  }

  .m-cert p {
    font-size: 12.5px;
    font-weight: 500;
    color: #004291;
    line-height: 1.4;
  }

  /* ---- VIDEO ---- */
  .sec-video {
    padding: 30px 14px 40px;
  }

  .video-box {
    width: 100%;
    height: auto;
    aspect-ratio: 964 / 544;
    margin-top: 0;
  }

  /* ---- FAQ ---- */
  .sec-faq {
    padding: 30px 16px 60px;
  }

  .faq-title {
    font-size: clamp(26px, 7.4vw, 30px);
    padding-top: 0;
  }

  .faq-list {
    width: 100%;
    margin-top: 15px;
  }

  .faq-q {
    font-size: 14px;
    padding: 15px 0;
  }

  .faq-arrow {
    border-left-width: 8px;
    border-right-width: 8px;
    border-top-width: 10px;
  }

  .faq-a p {
    font-size: 13px;
    padding-bottom: 16px;
  }

  /* ---- FOOTER ---- */
  .sec-footer {
    height: auto;
    padding: 34px 18px 40px;
  }

  .sec-footer>.band-abs {
    display: none;
  }

  .ft-logos {
    position: static;
    display: block;
    height: auto;
    width: min(330px, 84%);
    margin: 0 auto;
  }

  .ft-contact {
    position: static;
    margin-top: 24px;
  }

  .ft-contact h3 {
    font-size: 15px;
    margin-bottom: 15px;
  }

  .ft-grid {
    grid-template-columns: 1fr;
    column-gap: 0;
    row-gap: 14px;
  }

  .ft-row {
    font-size: 13px;
  }

  .ft-row img {
    width: 24px;
    height: 24px;
  }

  /* ---- FLOATING CTA ---- */
  .floating-cta {
    right: 12px;
    bottom: 12px;
    width: min(230px, 54vw);
  }

  .rv {
    transform: translateY(20px);
  }
}

/* Desktop-only mobile modules hidden */
@media (min-width: 861px) {

  .m-grid,
  .m-benefit,
  .m-pills,
  .m-certs,
  .ud-gifts,
  .vn-photo {
    display: none;
  }
}