.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 16px;
}

/* ============================================================
   ENGLISH LEADER — RESPONSIVE CSS (ĐẦY ĐỦ)
   Bao gồm container + tất cả elements bên trong
   ============================================================ */

/* ≤ 2000px  →  container 1536px (base lớn nhất) */
@media (max-width: 2000px) {
  .container {
    max-width: 1536px;
  }
}

/* ≤ 1536px  →  container 1300px */
@media (max-width: 1536px) {
  .container {
    max-width: 1300px;
  }

  body {
    font-size: 16px;
  }

  .title_banner h1 {
    font-size: 68px;
  }

  .title_banner p {
    font-size: 52px;
  }

  .home_banner_content {
    margin-top: 90px;
  }

  .home_banner_content_item {
    font-size: 27px;
  }

  .title_vd h2 {
    font-size: 60px;
  }

  .btn-dkn a {
    font-size: 30px;
  }

  .vande-content-left h3 {
    font-size: 58px;
  }

  .title_st {
    font-size: 48px;
  }

  .title_st strong {
    font-size: 58px;
  }

  .content_st h2 {
    font-size: 58px;
  }

  .list_content_st {
    font-size: 25px;
  }

  section#result h2 {
    font-size: 58px;
  }

  .result-wrap-list {
    font-size: 42px;
  }

  .about_home_content h2 {
    font-size: 58px;
  }

  .list-uu-diem h3 {
    font-size: 82px;
  }

  .title_founder h2 {
    font-size: 58px;
  }

  .title_achive h2 {
    font-size: 58px;
  }

  .content_achive_list h3 {
    font-size: 48px;
  }

  .title_pp h2 {
    font-size: 58px;
  }

  .text_pp {
    font-size: 25px;
  }

  .title_calender h2 {
    font-size: 58px;
  }

  .content_calender {
    font-size: 36px;
  }

  span.time-big {
    font-size: 66px;
  }

  .content_calender h3 {
    font-size: 44px;
  }

  .content_calender h4 {
    font-size: 38px;
  }

  .title_confi h2 {
    font-size: 58px;
  }

  .list_confi {
    font-size: 25px;
  }

  .title_tuition h2 {
    font-size: 58px;
  }

  .icon-text {
    font-size: 30px;
  }

  .content_tutition_list h3 {
    font-size: 50px;
  }

  .tutition-group a {
    font-size: 34px;
  }

  .text_ck h3 {
    font-size: 32px;
  }

  .title_feedback h2 {
    font-size: 58px;
  }

  .content-fb-list {
    font-size: 20px;
  }

  .cd-title {
    font-size: 58px;
  }

  .cd-badge {
    font-size: 50px;
  }

  .timer-number {
    font-size: 118px;
    width: 158px;
    height: 158px;
  }

  .timer-label {
    font-size: 44px;
  }

  .colon {
    font-size: 74px;
  }

  .content_form h2 {
    font-size: 40px;
  }

  .content_form h3 {
    font-size: 32px;
  }
}

/* ≤ 1440px  →  container 1200px */
@media (max-width: 1440px) {
  .container {
    max-width: 1200px;
  }



  .title_banner h1 {
    font-size: 60px;
  }

  .title_banner p {
    font-size: 46px;
  }

  .home_banner_content {
    margin-top: 80px;
  }

  .home_banner_content_item {
    font-size: 24px;
  }

  .title_vd h2 {
    font-size: 54px;
  }

  .btn-dkn a {
    font-size: 28px;
  }

  .vande-content-left h3 {
    font-size: 52px;
  }

  .title_st {
    font-size: 44px;
  }

  .title_st strong {
    font-size: 52px;
  }

  .content_st h2 {
    font-size: 52px;
  }

  .list_content_st {
    font-size: 22px;
  }

  .content_st {
    margin-left: -80px;
  }

  section#result h2 {
    font-size: 52px;
  }

  .result-wrap-list {
    font-size: 38px;
  }

  .text-result {
    padding: 16px 60px 44px;
  }

  .about_home_content h2 {
    font-size: 52px;
  }

  .list-uu-diem h3 {
    font-size: 76px;
  }

  .ud-diem-wrap {
    font-size: 26px;
    gap: 48px;
  }

  .title_founder h2 {
    font-size: 52px;
  }

  .title_achive h2 {
    font-size: 52px;
  }

  .content_achive_list h3 {
    font-size: 44px;
  }

  .content_achive {
    gap: 80px;
  }

  .title_pp h2 {
    font-size: 52px;
  }

  .text_pp {
    font-size: 23px;
  }

  .content_pp {
    gap: 90px;
  }

  .title_calender h2 {
    font-size: 52px;
  }

  .content_calender {
    font-size: 32px;
  }

  span.time-big {
    font-size: 60px;
  }

  .content_calender h3 {
    font-size: 40px;
  }

  .content_calender h4 {
    font-size: 34px;
  }

  .title_confi h2 {
    font-size: 52px;
  }

  .list_confi {
    font-size: 22px;
    padding: 30px 48px;
  }

  .title_tuition h2 {
    font-size: 52px;
  }

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

  .content_tutition_list h3 {
    font-size: 46px;
  }

  .tutition-group {
    padding: 40px 90px;
  }

  .tutition-group a {
    font-size: 32px;
  }

  .text_ck h3 {
    font-size: 30px;
  }

  .content_tuition {
    gap: 110px;
  }

  .title_feedback h2 {
    font-size: 52px;
  }

  .content-fb-list {
    font-size: 19px;
  }

  .cd-title {
    font-size: 52px;
  }

  .cd-badge {
    font-size: 44px;
  }

  .timer-number {
    font-size: 104px;
    width: 138px;
    height: 138px;
  }

  .timer-label {
    font-size: 40px;
  }

  .colon {
    font-size: 66px;
  }

  .content_form h2 {
    font-size: 36px;
  }

  .content_form h3 {
    font-size: 28px;
  }
}

/* ≤ 1280px  →  container 1140px */
@media (max-width: 1280px) {
  .container {
    max-width: 1140px;
  }

  body {
    font-size: 16px;
  }

  .title_banner h1 {
    font-size: 52px;
  }

  .title_banner p {
    font-size: 40px;
    padding: 7px 32px;
  }

  .home_banner_content {
    margin-top: 60px;
    width: 80%;
  }

  .home_banner_content_item {
    font-size: 22px;
    grid-template-columns: 52px 1fr;
  }

  .title_vd h2 {
    font-size: 48px;
  }

  .btn-dkn a {
    font-size: 26px;
  }

  .btn-dkn {
    margin: 30px 0 80px;
  }

  .vande-content-left h3 {
    font-size: 46px;
  }

  .title_st {
    font-size: 40px;
  }

  .title_st strong {
    font-size: 48px;
  }

  .content_st h2 {
    font-size: 48px;
  }

  .list_content_st {
    font-size: 20px;
    padding: 8px 16px;
  }

  .content_st {
    margin-left: -60px;
  }

  section#result h2 {
    font-size: 48px;
  }

  .result-wrap-list {
    font-size: 34px;
  }

  .result-wrap {
    gap: 36px;
  }

  .text-result {
    padding: 14px 48px 40px;
  }

  .about_home_content h2 {
    font-size: 48px;
  }

  .list-uu-diem h3 {
    font-size: 70px;
  }

  .ud-diem-wrap {
    font-size: 23px;
    gap: 40px;
  }

  .title_founder h2 {
    font-size: 48px;
  }

  .founder-wrap {
    gap: 50px;
  }

  .title_achive h2 {
    font-size: 48px;
  }

  .content_achive {
    gap: 60px;
  }

  .content_achive_list h3 {
    font-size: 40px;
  }

  .title_pp h2 {
    font-size: 48px;
  }

  .text_pp {
    font-size: 22px;
  }

  .content_pp {
    gap: 70px;
  }

  .title_calender h2 {
    font-size: 48px;
  }

  .content_calender {
    font-size: 28px;
  }

  span.time-big {
    font-size: 54px;
  }

  .content_calender h3 {
    font-size: 36px;
  }

  .content_calender h4 {
    font-size: 30px;
  }

  .title_confi h2 {
    font-size: 48px;
  }

  .list_confi {
    font-size: 20px;
    padding: 28px 38px;
  }

  .content_confi {
    gap: 20px;
    row-gap: 72px;
  }

  .title_tuition h2 {
    font-size: 48px;
  }

  .icon-text {
    font-size: 26px;
  }

  .content_tutition_list h3 {
    font-size: 42px;
  }

  .tutition-group {
    padding: 36px 70px;
  }

  .tutition-group a {
    font-size: 30px;
  }

  .text_ck h3 {
    font-size: 28px;
  }

  .content_tuition {
    gap: 90px;
  }

  .camket-wrap {
    gap: 70px;
  }

  .title_feedback h2 {
    font-size: 48px;
  }

  .content-fb-list {
    font-size: 18px;
  }

  .cd-title {
    font-size: 48px;
  }

  .cd-badge {
    font-size: 40px;
  }

  .timer-number {
    font-size: 90px;
    width: 120px;
    height: 120px;
  }

  .timer-label {
    font-size: 36px;
  }

  .colon {
    font-size: 58px;
  }

  .content_form h2 {
    font-size: 32px;
  }

  .content_form h3 {
    font-size: 26px;
  }
}

/* ≤ 1024px  →  container 960px */
@media (max-width: 1024px) {
  .container {
    max-width: 960px;
  }

  body {
    font-size: 14px;
  }

  .title_banner h1 {
    font-size: 44px;
    line-height: 1.4;
  }

  .title_banner p {
    font-size: 34px;
    padding: 6px 26px;
  }

  .home_banner_content {
    margin-top: 40px;
    width: 90%;
  }

  .home_banner_content_item {
    font-size: 19px;
    gap: 10px;
    grid-template-columns: 44px 1fr;
    margin: 10px;
  }

  section#van-de {
    margin-top: -60px;
  }

  .title_vd h2 {
    font-size: 42px;
  }

  .btn-dkn a {
    font-size: 22px;
  }

  .btn-dkn {
    margin: 24px 0 70px;
  }

  .wrap-vande {
    grid-template-columns: 55% 45%;
  }

  .vande-content-left h3 {
    font-size: 40px;
  }

  .list_vande {
    gap: 14px;
    margin: 10px 0;
  }

  section#su-that {
    padding: 80px 0;
  }

  .title_st {
    font-size: 36px;
    margin-bottom: 60px;
  }

  .title_st strong {
    font-size: 44px;
  }

  .content_st h2 {
    font-size: 44px;
  }

  .content_st {
    margin-left: -50px;
  }

  .list_content_st {
    font-size: 18px;
    margin: 30px 0;
  }

  section#result h2 {
    font-size: 44px;
  }

  .result-wrap {
    gap: 28px;
  }

  .result-wrap-list {
    font-size: 30px;
  }

  .text-result {
    padding: 12px 36px 36px;
  }

  .about_home_content h2 {
    font-size: 44px;
  }

  .about_home_wrap {
    grid-template-columns: 60% 40%;
  }

  .list-uu-diem h3 {
    font-size: 62px;
  }

  .ud-diem-wrap {
    gap: 28px;
    font-size: 20px;
  }

  .list-uu-diem {
    padding: 30px 24px;
  }

  .title_founder h2 {
    font-size: 44px;
  }

  .founder-wrap {
    gap: 40px;
  }

  .info_founder_list {
    gap: 14px;
    margin: 18px 0;
  }

  .title_achive h2 {
    font-size: 44px;
  }

  .content_achive {
    gap: 40px;
  }

  .content_achive_list h3 {
    font-size: 36px;
  }

  .title_pp h2 {
    font-size: 44px;
  }

  .text_pp {
    font-size: 20px;
  }

  .content_pp {
    gap: 50px;
  }

  .title_calender h2 {
    font-size: 44px;
  }

  .content_calender {
    font-size: 24px;
  }

  span.time-big {
    font-size: 46px;
  }

  .content_calender h3 {
    font-size: 30px;
  }

  .content_calender h4 {
    font-size: 26px;
  }

  .title_confi h2 {
    font-size: 44px;
  }

  .content_confi {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 72px;
    gap: 24px;
  }

  .list_confi {
    font-size: 19px;
    padding: 28px 32px;
  }

  .icon_confi {
    top: -22%;
  }

  .title_tuition h2 {
    font-size: 44px;
  }

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

  .content_tutition_list h3 {
    font-size: 38px;
  }

  .tutition-group {
    padding: 30px 56px;
  }

  .content_tutition_list:nth-child(2) .icon-text {
    padding: 36px 56px 70px;
  }

  .tutition-group a {
    font-size: 28px;
  }

  .content_tuition {
    gap: 70px;
  }

  .camket-wrap {
    gap: 60px;
    /* grid-template-columns: 210px 1fr; */
  }

  .text_ck h3 {
    font-size: 26px;
  }

  .title_feedback h2 {
    font-size: 44px;
  }

  .content-fb-list {
    font-size: 17px;
  }

  .name {
    font-size: 17px;
  }

  .cd-title {
    font-size: 44px;
  }

  .cd-badge {
    font-size: 36px;
    padding: 5px 34px;
  }

  .timer-number {
    font-size: 76px;
    width: 100px;
    height: 100px;
  }

  .timer-label {
    font-size: 28px;
  }

  .colon {
    font-size: 50px;
  }

  .timer-row {
    margin-top: 50px;
  }

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

  .content_form h3 {
    font-size: 24px;
  }

  .content_form {
    padding: 24px 44px;
  }
}

/* ≤ 768px  →  container 720px */
@media (max-width: 768px) {
  .container {
    max-width: 720px;
  }

  body {
    font-size: 14px;
  }

  .content-wrap-home {
    top: 3%;
  }

  .title_banner h1 {
    font-size: 34px;
    line-height: 1.3;
  }

  .title_banner p {
    font-size: 26px;
    padding: 5px 20px;
    border-width: 3px;
  }

  .home_banner_content {
    margin-top: 24px;
  }

  .home_banner_content_item {
    font-size: 15px;
    gap: 8px;
    grid-template-columns: 34px 1fr;
    margin: 8px 6px;
  }

  section#van-de {
    margin-top: 0px;
  }

  .title_vd h2 {
    font-size: 32px;
    text-align: center;
  }

  .btn-dkn {
    margin: 18px 0 50px;
    text-align: center;
  }

  .btn-dkn a {
    font-size: 18px;
    padding: 5px 18px;
  }

  .wrap-vande {
    grid-template-columns: 1fr;
  }

  .vande-content-left h3 {
    font-size: 30px;
    line-height: 2;
  }

  .img_vd {
    display: none;
  }

  .list_vande {
    gap: 10px;
    margin: 8px 0;
  }

  section#su-that {
    padding: 60px 0;
  }

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

  .img_st {
    text-align: center;
  }

  .img_st img {
    max-width: 100%;
  }

  .content_st {
    margin-left: 0;
    margin-top: 20px;
  }

  .content_st h2 {
    font-size: 36px;
  }

  .title_st {
    font-size: 30px;
    margin-bottom: 40px;
  }

  .title_st strong {
    font-size: 36px;
  }

  .list_content_st {
    font-size: 16px;
    margin: 20px 0;
  }

  section#result h2 {
    font-size: 32px;
    margin-bottom: 36px;
  }

  .result-wrap {
    grid-template-columns: 1fr;
    gap: 50px;
    max-width: 380px;
    margin: 0 auto;
  }

  .result-wrap-list {
    font-size: 26px;
  }

  .result-wrap-list-list {
    margin-top: -40px;
  }

  .text-result {
    padding: 10px 30px 30px;
  }

  .about_home_content h2 {
    font-size: 32px;
  }

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

  .about_home_img {
    display: none;
  }

  #about_home {
    margin: 60px 0;
  }

  .ud-diem-wrap {
    grid-template-columns: 1fr;
    gap: 16px;
    font-size: 17px;
  }

  .list-uu-diem h3 {
    font-size: 52px;
  }

  .list-uu-diem {
    padding: 26px;
    border-radius: 20px;
  }

  section#founder {
    padding: 60px 0;
  }

  .founder-wrap {
    grid-template-columns: 1fr;
  }

  .founder-right {
    text-align: center;
  }

  .founder-right img {
    max-width: 100%;
  }

  .title_founder h2 {
    font-size: 32px;
  }

  .info_founder_list {
    gap: 12px;
    margin: 14px 0;
  }

  section#achive {
    padding: 60px 0 0;
  }

  .title_achive h2 {
    font-size: 32px;
  }

  .content_achive {
    grid-template-columns: 1fr;
    gap: 36px;
    margin: 40px 0;
  }

  .content_achive_list h3 {
    font-size: 28px;
  }

  .content_achive_list ul {
    font-size: 15px;
  }

  section#pp {
    padding: 60px 0;
  }

  .title_pp h2 {
    font-size: 32px;
  }

  .content_pp {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .text_pp {
    font-size: 17px;
  }

  section#calender {
    padding-bottom: 60px;
  }

  .title_calender h2 {
    font-size: 32px;
  }

  .content_calender {
    width: 100%;
    font-size: 20px;
  }

  span.time-big {
    font-size: 36px;
  }

  .content_calender h3 {
    font-size: 24px;
  }

  .content_calender h4 {
    font-size: 20px;
  }

  section#confi {
    padding: 60px 0;
  }

  .title_confi h2 {
    font-size: 32px;
  }

  .content_confi {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 72px;
    gap: 16px;
    margin-top: 56px;
  }

  .list_confi {
    font-size: 16px;
    padding: 24px 16px;
    border-radius: 14px;
  }

  .icon_confi {
    width: 52px;
    height: 52px;
    top: -18%;
  }

  section#tuition {
    padding: 60px 0;
  }

  .title_tuition h2 {
    font-size: 32px;
  }

  .content_tuition {
    grid-template-columns: 1fr;
    gap: 40px;
    margin: 40px 0 70px;
  }

  .content_tutition_list h3 {
    font-size: 34px;
  }

  .icon-text {
    font-size: 19px;
    gap: 12px;
    margin-bottom: 28px;
  }

  .tutition-group {
    padding: 24px 30px;
  }

  .content_tutition_list:nth-child(2) .icon-text {
    padding: 26px 30px 50px;
  }

  .tutition-group a {
    font-size: 22px;
    padding: 12px 22px;
  }

  .camket-wrap {
    /* grid-template-columns: 150px 1fr; */
    gap: 28px;
  }

  .text_ck h3 {
    font-size: 20px;
  }

  .text_ck {
    width: 100%;
  }

  section#feedback {
    padding: 50px 0;
  }

  .title_feedback h2 {
    font-size: 32px;
    margin-bottom: 30px;
  }

  .content-fb-list {
    font-size: 15px;
    padding: 20px;
  }

  .info-group {
    grid-template-columns: 60px 1fr 52px;
    gap: 14px;
  }

  .name {
    font-size: 15px;
  }

  .countdown-wrapper {
    padding: 60px 20px;
  }

  .cd-title {
    font-size: 30px;
  }

  .cd-badge {
    font-size: 24px;
    padding: 5px 26px;
  }

  .timer-number {
    font-size: 54px;
    width: 72px;
    height: 72px;
    border-radius: 8px;
  }

  .timer-label {
    font-size: 20px;
  }

  .colon {
    font-size: 36px;
    padding-bottom: 22px;
  }

  .timer-row {
    margin-top: 36px;
    gap: 6px;
  }

  section#form_dang_ky {
    padding: 60px 0;
  }

  .form-dk-wrap {
    grid-template-columns: 1fr;
  }

  .img_ava {
    display: none;
  }

  .bg-xanh {
    display: none;
  }

  .content_form {
    padding: 24px 28px;
    border-radius: 20px;
  }

  .content_form h2 {
    font-size: 26px;
  }

  .content_form h3 {
    font-size: 20px;
    margin: 20px 0;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  nav {
    height: 80px;
    padding: 0 1.25rem;
  }

  .nav-left {
    display: flex !important;
    align-items: center;
    font-size: 20px;
  }

  .nav-logo {
    width: 70px;
  }

  .nav-links {
    display: none !important;
  }

  .btn-join {
    font-size: 14px;
}
}

/* ≤ 480px  →  container full width */
@media (max-width: 480px) {
  .container {
    max-width: 100%;
    padding: 0 12px;
  }

  body {
    font-size: 14px;
  }

  .content-wrap-home {
    top: 2%;
  }

  .title_banner h1 {
    font-size: 22px;
    line-height: 1.3;
    margin: 10px;
  }

  .title_banner p {
    font-size: 16px;
    padding: 4px 14px;
    border-width: 2.5px;
  }

  .home_banner_content {
    margin-top: 14px;
  }

  .home_banner_content_item {
    font-size: 10px;
    gap: 2px;
    grid-template-columns: 16px 1fr;
    margin: 9px 0px;
  }

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

  .btn-dkn a {
    font-size: 14px;
    padding: 5px 14px;
    gap: 8px;
  }

  .btn-dkn a img {
    width: 32px;
  }

  .vande-content {
    border-radius: 14px;
  }

  .vande-content-left h3 {
    font-size: 22px;
    line-height: 1.8;
  }

  .list_vande img {
    width: 34px;
  }

  .content_st h2 {
    font-size: 26px;
  }

  .title_st {
    font-size: 22px;
  }

  .title_st strong {
    font-size: 28px;
  }

  .list_content_st {
    font-size: 14px;
    gap: 10px;
    padding: 7px 14px;
    margin: 14px 0;
  }

  .list_content_st img {
    width: 28px;
  }

  section#result h2 {
    font-size: 24px;
  }

  .result-wrap {
    max-width: 100%;
  }

  .result-wrap-list {
    font-size: 20px;
  }

  .text-result {
    padding: 8px 20px 24px;
  }

  .result-wrap-list img {
    width: 44px;
  }

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

  .list-uu-diem h3 {
    font-size: 40px;
  }

  .list-uu-diem {
    font-size: 15px;
    padding: 20px;
  }

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

  .info_founder_list img {
    width: 34px;
  }

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

  .content_achive_list h3 {
    font-size: 22px;
  }

  .content_achive_list ul {
    padding: 18px;
    padding-left: 32px;
    font-size: 14px;
  }

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

  .text_pp {
    font-size: 15px;
  }

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

  .content_calender {
    font-size: 17px;
  }

  span.time-big {
    font-size: 28px;
  }

  .content_calender h3 {
    font-size: 18px;
  }

  .content_calender h4 {
    font-size: 16px;
  }

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

  .content_confi {
    grid-template-columns: 1fr 1fr;
    row-gap: 26px !important;
    gap: 10px;
  }

  .list_confi {
    font-size: 13px;
    padding: 18px 10px;
    border-radius: 12px;
  }

  .icon_confi {
    width: 30px;
    height: 30px;
    top: -16%;
  }

  .icon_confi img {
    width: 50%;
  }

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

  .content_tutition_list h3 {
    font-size: 26px;
  }

  .icon-text {
    font-size: 16px;
    gap: 10px;
    margin-bottom: 18px;
  }

  .icon-text img {
    width: 34px;
  }

  .tutition-group {
    padding: 18px;
  }

  .content_tutition_list:nth-child(2) .icon-text {
    padding: 18px 18px 36px;
  }

  .tutition-group a {
    font-size: 17px;
    padding: 10px 16px;
  }

  /* .camket-wrap {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 0;
  } */

  .camket-wrap {
    grid-template-columns: 100px 1fr;
    /* align-items: center !important; */
  }

  .camket-wrap img {
    margin: 0px;
    display: block;
  }

  .name img {
    width: 40% !important;
  }

  .text_ck {
    width: 100%;
    padding: 0 12px 20px;
  }

  .text_ck h3 {
    font-size: 16px;
  }

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

  .content-fb-list {
    font-size: 14px;
    padding: 16px;
    border-radius: 18px;
  }

  .info-group {
    grid-template-columns: 48px 1fr 42px;
    gap: 10px;
  }

  .name {
    font-size: 14px;
  }

  .cd-title {
    font-size: 20px;
  }

  .cd-badge {
    font-size: 17px;
    padding: 4px 18px;
  }

  .timer-number {
    font-size: 40px;
    width: 54px;
    height: 54px;
    border-radius: 6px;
  }

  .timer-label {
    font-size: 14px;
  }

  .colon {
    font-size: 28px;
    padding-bottom: 18px;
  }

  .timer-row {
    margin-top: 24px;
    gap: 4px;
  }

  .content_form h2 {
    font-size: 20px;
  }

  .content_form h3 {
    font-size: 16px;
  }

  .content_form {
    padding: 18px 14px;
  }

  .content_form label {
    font-size: 14px;
  }

  .footer-ld-wrap {
    grid-template-columns: 1fr;
  }

  section#footer-ld h2 {
    font-size: 24px;
  }

  .text_chan_trang {
    font-size: 14px;
  }
}

/* ≤ 375px — Điện thoại nhỏ */
@media (max-width: 375px) {
  .title_banner h1 {
    font-size: 17px;
  }

  .title_banner p {
    font-size: 13px;
  }

  .home_banner_content_item {
    font-size: 10px;
  }

  .title_vd h2 {
    font-size: 20px;
  }

  .btn-dkn a {
    font-size: 12px;
  }

  .vande-content-left h3 {
    font-size: 18px;
  }

  .content_st h2 {
    font-size: 22px;
  }

  .list_content_st {
    font-size: 12px;
  }

  section#result h2 {
    font-size: 20px;
  }

  .result-wrap-list {
    font-size: 17px;
  }

  .about_home_content h2 {
    font-size: 20px;
  }

  .list-uu-diem h3 {
    font-size: 34px;
  }

  .title_founder h2,
  .title_achive h2,
  .title_pp h2,
  .title_calender h2,
  .title_confi h2,
  .title_tuition h2,
  .title_feedback h2 {
    font-size: 20px;
  }

  .list_confi {
    font-size: 12px;
    padding: 16px 8px;
  }

  .icon_confi {
    width: 40px;
    height: 40px;
  }

  .timer-number {
    font-size: 30px;
    width: 44px;
    height: 44px;
  }

  .timer-label {
    font-size: 12px;
  }

  .colon {
    font-size: 22px;
    padding-bottom: 14px;
  }

  .cd-title {
    font-size: 16px;
  }

  .cd-badge {
    font-size: 13px;
  }

  .content_form h2 {
    font-size: 17px;
  }
}