:root {
  --body-bg: hsl(197, 88%, 99%);
  --text-color: #333;
  --navbar-bg: #fff;
  --primary-color: #165dff;
  --primary-hover-color: #4080ff;
  --text-gradient-start: hsl(220deg 100% 50%);
  --text-gradient-end: hsl(220deg 100% 60%);
  --secondary-color: #f3f3f3;
  --hero-bg-gradient: linear-gradient(120deg, hsl(197 96% 99% / 80%) 40%, transparent 80%);
  --hero-button-shadow-color: rgba(46, 70, 146, 0.102);
  --hero-button-secondary-border-color: #f3f3f3;
  --hero-button-secondary-hover-border-color: #1a73e8;
  --feature-card-bg-gradient-start: #888;
  --feature-card-bg-gradient-end: #aaa;
  --feature-card-icon-bg-gradient: linear-gradient(to bottom right, #ffffff55, transparent);
  --feature-card-icon-shadow-color: rgba(0, 0, 0, 0.2);
  --feature-card-icon-shadow-inset-color: rgba(255, 255, 255, 0.1);
  --feature-card-special-bg-gradient-start: #1a1a1a;
  --feature-card-special-bg-gradient-end: #3f3f3f;
  --feature-badge-bg-gradient-start: #888;
  --feature-badge-bg-gradient-end: #ccc;
  --feature-badge-special-bg-gradient-start: #494949;
  --feature-badge-special-bg-gradient-end: #c5b48d;
  --card-icon-bg-color-1: #9e61f3;
  --card-icon-bg-color-2: #4a5aea;
  --card-icon-bg-color-3: #2ad2ca;
  --card-icon-bg-color-4: #7457f6;
  --card-icon-bg-color-5: #1a6fff;
  --card-icon-bg-color-6: #934dfb;
  --card-icon-bg-color-7: #34a4ef;
  --card-icon-bg-color-8: #6384b0;
  --value-primary-color: #165dff;
  --value-secondary-color: #f3f3f3;
  --value-card-bg-color-1: #165dff;
  --value-card-list-bg-color-1: linear-gradient(180deg, rgba(0, 99, 255, 0.2) 0%, rgba(255, 255, 255, 0.00) 33%), #FFF;
  --value-card-bg-color-2: #1da1f2;
  --value-card-list-bg-color-2: linear-gradient(180deg, rgba(0, 179, 255, 0.2) 0%, rgba(255, 255, 255, 0.00) 33%), #FFF;
  --value-card-bg-color-3: #9b59b6;
  --value-card-list-bg-color-3: linear-gradient(180deg, rgba(140, 86, 255, 0.2) 0%, rgba(255, 255, 255, 0.00) 33%), #FFF;
  --value-card-bg-color-4: #1abc9c;
  --value-card-list-bg-color-4: linear-gradient(180deg, rgba(23, 203, 203, 0.2) 0%, rgba(255, 255, 255, 0.00) 33%), #FFF;
  --footer-content-bg: #f4f7fc;
}

body {
  margin: 0;
  padding: 0;
  background: var(--body-bg);
  color: var(--text-color);
}

.navbar {
  background-color: var(--navbar-bg);
  height: 60px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
  width: 200px;
  text-align: center;
}

.navbar-nav {
  font-size: 14px;
  width: 100%;
  margin-left: 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-link {
  margin-right: 16px;
}

.auth-links {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.auth-link {
  margin-right: 16px;
}

.register-btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: #fff;
  padding: 0 40px;
  height: 60px;
  line-height: 60px;
  text-align: center;
}

.register-btn:hover {
  background-color: var(--primary-hover-color);
}

.container {
  /* max-width: 1200px; */
  margin: 0 auto;
  padding: 0 16px;
}

.hero-section {
  display: flex;
  align-items: center;
  padding: 24px;
  margin-top: 32px;
  position: relative;
  background: var(--hero-bg-gradient);
}

.hero-title {
  display: inline-block;
  font-size: 48px;
  font-weight: bold;
  text-align: left;
  background-clip: text;
  color: transparent;
  background: linear-gradient(120deg, var(--text-gradient-start) 40%, var(--text-gradient-end) 80%);
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: #0c0d0e;
  font-size: 32px;
  font-weight: 600;
  margin-top: 10px;
}

.hero-description {
  color: #4e5969;
  font-size: 16px;
  font-weight: 400;
  margin-top: 24px;
  max-width: 510px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.hero-buttons {
  margin-top: 28px;
}

.hero-button-primary {
  display: inline-block;
  padding: 10px 40px;
  background: var(--primary-color);
  color: #fff;
  border-radius: 8px;
  box-shadow: 0 6px 8px 0 var(--hero-button-shadow-color);
  margin-right: 16px;
}

.hero-button-primary:hover {
  background: var(--primary-hover-color);
}

.hero-button-secondary {
  display: inline-block;
  padding: 10px 40px;
  background-color: #fff;
  border-radius: 8px;
  border: 1px solid var(--hero-button-secondary-border-color);
  box-shadow: 0 3px 8px var(--hero-button-shadow-color);
  color: #101010;
}

.hero-button-secondary:hover {
  border: 1px solid var(--hero-button-secondary-hover-border-color);
  box-shadow: 0 3px 8px var(--hero-button-shadow-color);
}

.hero-image {
  position: absolute;
  bottom: -48px;
  right: 5vw;
  z-index: -1;
  filter: saturate(1.2) contrast(1.2);
}

.feature-section {
  padding: 48px 0;
  margin-top: 96px;
}

.feature-title {
  font-size: 40px;
  font-weight: 500;
  text-align: center;
}

.feature-subtitle {
  color: #888;
  margin-top: 8px;
  text-align: center;
}

.feature-link {
  color: #1664ff;
  margin-top: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature-link:hover {
  color: #3888ff;
}

.feature-link-icon {
  width: 14px;
  height: 14px;
  margin-left: 4px;
  transition: all 0.3s ease;
}

.feature-link:hover .feature-link-icon {
  transform: translateX(4px);
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.feature-card {
  min-height: 261px;
  background: linear-gradient(to bottom right, var(--feature-card-bg-gradient-start), var(--feature-card-bg-gradient-end));
  padding: 32px;
  border-radius: 16px;
  color: white;
  position: relative;
  transition: box-shadow 0.3s ease;
}

.feature-card:hover {
  box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.05), 0 15px 35px -2px rgba(0, 0, 0, 0.05),
    0 4px 60px 0 rgba(119, 119, 119, 0.18);
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--feature-card-icon-bg-gradient);
  box-shadow: 0 4px 8px var(--feature-card-icon-shadow-color), 0 0 10px var(--feature-card-icon-shadow-inset-color) inset;
  position: relative;
  z-index: 1;
}

.feature-card-icon::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  z-index: -1;
}

.feature-card-icon i {
  font-size: 24px;
}

.feature-card-title {
  font-size: 24px;
  margin-top: 16px;
}

.feature-cards-tags {
  margin-top: 12px;
  display: flex;
}

.feature-cards-tags-item {
  border: 1px solid currentColor;
  border-radius: 4px;
  padding: 0 8px;
  font-size: 12px;
  line-height: 20px;
}

.feature-card-description {
  margin-top: 24px;
  font-size: 14px;
  font-weight: 400;
}

.feature-badge {
  background: linear-gradient(to right, var(--feature-badge-bg-gradient-start), var(--feature-badge-bg-gradient-end));
  color: white;
  font-size: 12px;
  font-style: italic;
  font-weight: 500;
  padding: 5px 10px;
  position: absolute;
  top: 0;
  right: 0;
  border-bottom-left-radius: 15px;
  border-top-right-radius: 8px
}

.feature-card-special {
  background: linear-gradient(to bottom right, var(--feature-card-special-bg-gradient-start), var(--feature-card-special-bg-gradient-end));
  color: #fc8;
}

.feature-badge-special {
  background: linear-gradient(to right, var(--feature-badge-special-bg-gradient-start), var(--feature-badge-special-bg-gradient-end));
}

.cards-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 32px;
}

@media (min-width: 768px) {
  .cards-container {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.card {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 3px 18px 0 #3341651a;
  transform: translateY(-2px);
}

.card:hover .card-title {
  color: #165dff;
}

.card-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--card-icon-bg-color-1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.card:nth-child(2) .card-icon {
  background: var(--card-icon-bg-color-2);
}

.card:nth-child(3) .card-icon {
  background: var(--card-icon-bg-color-3);
}

.card:nth-child(4) .card-icon {
  background: var(--card-icon-bg-color-4);
}

.card:nth-child(4) .card-icon i {
  margin-left: 3px;
}

.card:nth-child(5) .card-icon {
  background: var(--card-icon-bg-color-5);
}

.card:nth-child(6) .card-icon {
  background: var(--card-icon-bg-color-6);
}

.card:nth-child(7) .card-icon {
  background: var(--card-icon-bg-color-7);
}

.card:nth-child(8) .card-icon {
  background: var(--card-icon-bg-color-8);
}

.card-icon i {
  color: #fff;
  font-size: 18px;
}

.card-title {
  font-size: 18px;
  font-weight: 550;
  margin-top: 16px;
}

.card-title span {
  background-clip: text;
  color: transparent;
  background: linear-gradient(120deg, var(--text-gradient-start) 40%, var(--text-gradient-end) 80%);
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent;
}

.card-text {
  margin-top: 8px;
  color: var(--text-color);
  font-size: 12px;
}

.content {
  background: hsl(210, 88%, 99%);
}

.tab {
  margin: 80px 0;
  padding: 80px 160px;
  text-align: center;
}

.tabs {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: space-around;
  border-bottom: 2px solid var(--secondary-color);
  margin-bottom: 20px;
}

.tab-link {
  font-size: 16px;
  padding: 10px 20px;
  cursor: pointer;
  transition: color 0.3s, transform 0.3s;
  position: relative;
}


.tab-link.active::after {
  transform: scaleX(1);
}

.tab-link:hover {
  color: #888;
}

.tab-link.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
}

.tab-link::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background: var(--primary-color);
  position: absolute;
  bottom: -2px;
  left: 0;
  transform: scaleX(0);
  transition: transform 0.3s;
}

.tab-link.active::after {
  transform: scaleX(1);
}

.tab-content {
  display: none;
  text-align: left;
  opacity: 0;
  transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
  transform: translateY(20px);
}

.tab-content.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.tab-section {
  text-align: center;
  margin-bottom: 40px;
}

.tab-section h1 {
  font-size: 48px;
  font-weight: 500;
  text-align: center;
}

.tab-section p {
  margin-top: 10px;
  font-size: 16px;
  color: #666;
}

.tab-content-wrapper {
  padding: 40px;
  display: flex;
  justify-content: space-between;
}

.tab-content-left {
  margin: 0 192px 0 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 364px;
}

.tab-content-left h2 {
  font-size: 32px;
  font-weight: 500;
}

.tab-content-left p {
  font-size: 14px;
  color: #666;
  margin: 20px 0 30px 0;
}

.tab-content-left a {
  background: var(--primary-color);
  color: #fff;
  border: none;
  width: 114px;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  text-align: center;
}

.tab-content-right {
  width: 650px;
  height: 435px;
}

.tab-content-right img {
  width: 100%;
  border-radius: 12px;
}

.value {
  padding-bottom: 80px;
  margin: 0 auto;
  text-align: center;
}

.value-section-title {
  font-size: 32px;
  font-weight: bold;
}

.value-section-subtitle {
  font-size: 16px;
  color: #888;
  margin-bottom: 40px;
}

.value-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  margin-top: 40px;
}

.value-card {
  background: #fff;
  height: 100%;
  width: 345px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  transition: box-shadow 0.3s;
}

.value-card-title {
  font-size: 32px;
  text-align: left;
  color: #fff;
  padding: 30px 0 30px 40px;
  border-radius: 12px 12px 0 0;
}

.value-card-subtitle {
  font-size: 18px;
  color: currentColor;
  margin-bottom: 10px;
  letter-spacing: .2px;
  line-height: 28px;
}

.value-card:nth-child(1) {
  background: var(--value-card-bg-color-1);
}

.value-card:nth-child(1) .value-card-list {
  background: var(--value-card-list-bg-color-1);
}

.value-card:nth-child(2) {
  background: var(--value-card-bg-color-2);
}

.value-card:nth-child(2) .value-card-list {
  background: var(--value-card-list-bg-color-2);
}

.value-card:nth-child(3) {
  background: var(--value-card-bg-color-3);
}

.value-card:nth-child(3) .value-card-list {
  background: var(--value-card-list-bg-color-3);
}

.value-card:nth-child(4) {
  background: var(--value-card-bg-color-4);
}

.value-card:nth-child(4) .value-card-list {
  background: var(--value-card-list-bg-color-4);
}

.value-card-list {
  list-style: none;
  padding: 30px 40px 60px 40px;
  border-radius: 12px;
}

.value-card-list li {
  font-size: 14px;
  color: #555;
  text-align: left;
  position: relative;
  line-height: 1.5;
}

.value-card-list li span {
  color: #1964ff;
  margin-right: 5px;
}

.img-footer {
  height: 325px;
  background-image: url("../img/footer-bg.png");
  background-size: 100% 100%;
  background-repeat: no-repeat;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.img-footer h1 {
  font-size: 35px;
  font-weight: 500;
  white-space: nowrap;
}

.img-footer a {
  padding: 0 34px;
  height: 56px;
  font-size: 18px;
  border-radius: 5px;
  cursor: pointer;
  background: var(--primary-color);
  color: #fff;
  border: none;
  margin-top: 30px;
  text-align: center;
  line-height: 56px;
}

.footer-content {
  background: var(--footer-content-bg);
}

.footer-content-adv {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 120px;
  border-bottom: 1px solid #dde2e9;
  margin: 0 auto;
}

@media screen and (max-width: 1439px) {
  .footer-content-adv {
    max-width: 1280px;
    padding: 0 40px
  }
}

@media screen and (min-width: 1440px) and (max-width:1679px) {
  .footer-content-adv {
    max-width: 1280px
  }
}

@media screen and (min-width: 1680px) {
  .footer-content-adv {
    max-width: 1440px;
  }
}

@media screen and (max-width: 1023px) {
  .footer-content-adv {
    display: none
  }
}

.footer-content-adv-item {
  display: flex;
  margin-left: 120px;
}

.footer-content-adv-item:first-child {
  margin-left: 0;
}

.footer-content-adv-text {
  margin-left: 16px;
  font-size: 14px;
}

.footer-content-adv-text div:first-child {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
}

.footer-content-info {
  margin: 0 auto;
  padding: 60px 0;
  border-bottom: 1px solid #dde2e9;
}

@media screen and (max-width: 1439px) {
  .footer-content-info {
    max-width: 1280px;
    padding: 0 40px
  }
}

@media screen and (min-width: 1440px) and (max-width:1679px) {
  .footer-content-info {
    max-width: 1280px
  }
}

@media screen and (min-width: 1680px) {
  .footer-content-info {
    max-width: 1440px
  }
}

.footer-content-info-menu-title {
  font-size: 14px;
  font-weight: 500;
  color: #020814;
}

.footer-content-info-menu {
  margin-top: 16px;
  flex-direction: column;
}

.footer-content-info-menu-link {
  font-size: 14px;
  font-weight: 400;
  line-height: 22px;
  margin-bottom: 8px;
  color: #41464f;
}

.footer-copyright {
  padding: 32px 0;
  font-size: 14px;
}