:root {
  --primary-color: #4477FF;
  --secondary-color: #00bfff;
  --dark-bg: #030510;
  --darker-bg: #050510;
  --text-color: #ffffff;
  --text-secondary: #b8b8d0;
  --accent-color: #00e5ff;
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --transition: all 0.3s ease;
  --primary-hover: #6e99ff;
  --header-height: 60px;
  --main-width: 1200px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--dark-bg);
  color: var(--text-color);
  overflow-x: hidden;
  position: relative;
  width: 100%;
  max-width: 100vw;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 0 30px;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(0, 0, 0, 0.5);
}

.header__container {
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  display: flex;
  align-items: center;
}

.header__logo .logo-icon {
  width: 116px;
  height: 38px;
}

.header__btn__box {
  display: flex;
  align-items: center;
}

.nav__list {
  display: flex;
  list-style: none;
}

.nav__item {
  margin-left: 30px;
}

.nav__link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  font-size: 16px;
  cursor: pointer;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

.nav__link:hover::after {
  width: 100%;
}

.header__cta a {
  text-decoration: none;
  color: var(--text-color);
  display: block;
  width: 100%;
  height: 100%;
}

.header__cta {
  background-color: var(--primary-color);
  width: 140px;
  height: 38px;
  border-radius: 8px;
  line-height: 38px;
  text-align: center;
  font-size: 14px;
  font-weight: bold;
  margin-left: 50px;
  cursor: pointer;
  transition: all .3s cubic-bezier(.645,.045,.355,1);
}

.header__cta:hover {
  transform: translateY(-3px);
}

.btn--primary {
  background-color: var(--primary-color);
  width: 220px;
  height: 48px;
  border-radius: 8px 16px 8px 16px;
  line-height: 48px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  transition: all .3s cubic-bezier(.645,.045,.355,1);
  cursor: pointer;
  text-align: center;
}

.btn--primary:hover {
  transform: translateY(-3px);
}

/*banner*/
.banner__box {
  position: relative;
}

.banner__box::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.banner__box .banner__video {
  width: 100%;
  display: block;
  height: 100vh;
  object-fit: cover;
  autoplay: true;
  muted: true;
  playsinline: true;
}

.banner__box .container {
  width: var(--main-width);
  position: absolute;
  top: 0;
  height: 100%;
  padding-top: var(--header-height);
  margin: auto;
  left: 50%;
  transform: translate(-50%, -10%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 2;
}

.banner__box .container h2 {
  font-size: 30px;
}

.banner__box .container h1 {
  font-size: 80px;
}

.banner__box .container h3 {
  font-size: 18px;
  font-weight: normal;
  margin-bottom: 30px;
}

.banner__box .container .highlight {
  background:  linear-gradient(135deg, var(--primary-color), var(--secondary-color));;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.main__box {
  width:var(--main-width);
  margin: 0 auto;
  position: relative;
  z-index: 3;
}

.stats {
  display: flex;
  width: 100%;
  gap: 30px;
  margin-top: -90px;
}

.stat__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 180px;
  background: radial-gradient(rgba(19,52,138,0.40), rgba(23,28,57,0.00) 100%);
  border-radius: 8px;
}

.stat__item .stat__value {
  font-size: 40px;
  font-weight: bold;
}

.stat__item .stat__label {
  font-size: 18px;
  line-height: 21px;
}

.section__text1, .section__text2 {
  margin: 50px;
  text-align: center;
}

.section__text1 h2 {
  font-size: 40px;
  margin-bottom: 40px;
}

.section__text1 h3 {
  font-size: 30px;
}

.section__top__brand {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(4, 1fr)
}

.section__top__brand .brand__item {
  flex: 1;
  height: 450px;
  background-size: 100%;
  text-align: center;
  position: relative;
  transition: all .3s ease;
  background-position: center;
  background-repeat: no-repeat;
}

.section__top__brand .brand__item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: all .3s cubic-bezier(.645,.045,.355,1);
  background: linear-gradient(0deg,rgba(6,8,19,0.40), rgba(6,8,19,0.70) 100%);
}

.section__top__brand .brand__item:hover {
  background-size: 105%;
}

.section__top__brand .brand__item:hover::before {
  background: linear-gradient(0deg,rgba(0,39,143,0.00), rgba(0,39,143,0.80) 100%);
}

.section__top__brand .brand__item .brand-icon {
  width: 180px;
  height: 40px;
  margin-top: 30px;
  position: relative;
}

.section__top__brand .brand__item:nth-child(1) {
  background-image: url("../images/volvo_2@2x.png");
}

.section__top__brand .brand__item:nth-child(2) {
  background-image: url("../images/ford_1@2x.png");
}

.section__top__brand .brand__item:nth-child(3) {
  background-image: url("../images/audi_1@2x.png");
}

.section__top__brand .brand__item:nth-child(4) {
  background-image: url("../images/honda_1@2x.png");
}

.result__card {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.result__card img {
  height: 80px;
  width: 80px;
}

.result__card .result__num {
  font-size: 40px;
}

.result__card .result__num .point {
  font-size: 30px;
}

.result__card .result__label {
  font-size: 18px;
}

.section__text2 h2  {
  font-size: 30px;
  line-height: 45px;
}

.section__text2 h3 {
  font-size: 18px;
  font-weight: normal;
  opacity: 0.8;
}

.section__rise__brand {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(2, 1fr);
}

.rise__brand__item:hover .result__card {
  transform: translateY(-20px);
}

.section__rise__brand .result__card {
  margin-top: 0;
  transition: all .3s ease;
}

.section__rise__brand .rise__brand__item {
  display: flex;
  align-items: center;
  height: 209px;
  background: radial-gradient(rgba(19,52,138,0.40), rgba(23,28,57,0.00) 100%);
  border: 1px solid rgba(97,107,173,0.20);
  border-radius: 8px;
}

.section__rise__brand .rise__brand__item>div {
  flex: 1;
}

.section__rise__brand .rise__brand__item .brand__img {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
  background: radial-gradient(rgba(19,52,138,0.90), rgba(23,28,57,0.43) 100%);
}

.section__rise__brand .rise__brand__item:nth-child(1) .brand__img img {
  width: 81px;
  height: 66px;
}

.section__rise__brand .rise__brand__item:nth-child(2) .brand__img img {
  width: 107px;
  height: 40px;
}

.section__rise__brand .rise__brand__item:nth-child(3) .brand__img img {
  width: 154px;
  height: 16px;
}

.section__rise__brand .rise__brand__item:nth-child(4) .brand__img img {
  width: 160px;
  height: 20px;
}

.section__all__brand img {
  width: 100%;
}

.solutions {
  overflow: hidden;
  margin-bottom: 30px;
}

.solutions__item {
  height: 450px;
  position: relative;
}

.solutions .solutions__img {
  position: relative;
}

.solutions__img.phone {
  display: none;
}

.solutions .solutions__img .solutions__label {
  position: absolute;
  bottom: 40px;
  left: 0;
  height: 87px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
}

.solutions .solutions__img .solutions__label h4 {
  font-size: 18px;
}

.solutions .solutions__img .solutions__label h2 {
  font-size: 40px;
}

.solutions__label__1 {
  background: linear-gradient(90deg,#ba1809, rgba(98,11,3,0.00));
  padding-left: 30px;
}

.solutions__label__2 {
  background: linear-gradient(90deg,rgba(10,67,220,0.00), #00bcf6);
  padding-right: 30px;
  align-items: flex-end;
}

.solutions__label__3 {
  background: linear-gradient(90deg,#0d43d8, rgba(0,62,65,0.00));
  padding-left: 30px;
}

.solutions__item .filter__bg__box {
  -webkit-filter: blur(40px);
  -moz-filter: blur(40px);
  -o-filter: blur(40px);
  -ms-filter: blur(40px);
  opacity: .29;
  height: 100%;
  width: 100%;
}

.filter__bg__box.filter__1, .solutions__img__1 {
  background-image: url("../images/filter-bg-3.png");
  background-position: 25%;
  background-size: cover;
}

.filter__bg__box.filter__2, .solutions__img__2 {
  background-image: url("../images/filter-bg-2.png");
  background-position: center;
  background-size: cover;
}

.filter__bg__box.filter__3, .solutions__img__3 {
  background-image: url("../images/filter-bg-1.png");
  background-position: 25%;
  background-size: cover;
}

.solutions-container {
  height: 100%;
  width: 100%;
  display: flex;
  position: absolute;
  z-index: 1;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

.solutions-container>div {
  flex: 1;
}

.solutions__text {
  padding: 30px
}

.solutions__text h3 {
  font-size: 18px;
  opacity: 0.8;
  font-weight: normal;
  margin-bottom: 10px;
  line-height: 27px;
}

.solutions__text p {
  font-size: 18px;
  line-height: 40px;
  font-weight: bold;
}

.clip-right {
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0% 100%);
}

.clip-left {
  clip-path: polygon(0 0, 85% 0, 100% 100%, 0% 100%)
}

.section__company {
  height: 450px;
  background-image: url("../images/qiyuautobj-2@2x.png");
  background-size: contain;
  background-position: bottom;
  background-repeat: no-repeat;
  text-align: center;
  overflow: hidden;
}

.section__company .container {
  max-width: var(--main-width);
  margin: auto;
}

.section__company h1 {
  font-size: 30px;
  line-height: 45px;
  margin-top: 30px;
}

.section__company h3 {
  font-size: 18px;
  opacity: 0.8;
  font-weight: normal;
  margin-top: 20px;
  line-height: 27px;
}

.section__company img {
  width: 862px;
  height: 40px;
  margin-top: 20px;
}

.footer__container {
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--main-width);
  margin: auto;
}

.footer__container .item {
  display: flex;
  align-items: center;
  font-size: 14px;
}

.footer__container .item img {
  height: 20px;
  width: 20px;
  margin-right: 5px;
}

.footer__container .item.info {
  opacity: .6;
}

/* Responsive design for mobile devices */
@media (max-width: 768px) {
  /* Make buttons more touch-friendly on mobile */
  .btn--primary {
    width: 100%;
    max-width: 280px;
    height: 50px;
    line-height: 50px;
    font-size: 16px;
    margin: 0 auto;
  }
  :root {
    --main-width: 100%;
  }

  .header {
    padding: 0 15px;
  }

  .header__logo .logo-icon {
    width: 90px;
    height: 30px;
  }

  .header__cta {
    display: none;
  }

  .banner__box .container {
    width: 100%;
    padding: 0 20px;
    padding-top: var(--header-height);
    transform: translate(-50%, 0);
  }

  .banner__box .container h1 {
    font-size: 40px;
  }

  .banner__box .container h2 {
    font-size: 20px;
  }

  .banner__box .container h3 {
    font-size: 14px;
  }

  .main__box {
    width: 100%;
    padding: 0 15px;
  }

  .stats {
    flex-direction: column;
    gap: 15px;
    margin-top: -40px;
  }

  .stat__item {
    height: 120px;
    padding: 20px 0;
  }

  .section__text1, .section__text2 {
    margin: 30px 0;
  }

  .section__text1 h2 {
    font-size: 25px;
  }

  .section__text1 h3 {
    font-size: 20px;
  }

  .section__top__brand {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .section__rise__brand {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section__top__brand .brand__item {
    background-size: cover;
  }

  .section__top__brand .brand__item:hover {
    background-size: cover;
  }


  .solutions__item {
    height: auto;
    min-height: 450px;
  }

  .solutions__img {
    height: 450px;
    clip-path: none;
  }

  .solutions-container {
    flex-direction: column;
    position: static;
    display: block;
  }

  .solutions__text {
    padding: 20px;
  }

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

  .solutions__text p {
    font-size: 16px;
    line-height: 30px;
  }

  .solutions .solutions__img .solutions__label h2 {
    font-size: 30px;
  }

  .solutions__img.pc {
    display: none;
  }

  .solutions__img.phone {
    display: block;
  }

  .section__company {
    height: auto;
    padding: 30px 0;
  }

  .section__company h1 {
    font-size: 25px;
  }

  .section__company h3 {
    font-size: 16px;
    padding: 0 20px;
  }

  .section__company img {
    width: 90%;
    height: auto;
  }

  .footer__container {
    flex-direction: column;
    height: auto;
    padding: 20px 0;
    gap: 15px;
  }

  /* Responsive video handling */
  .banner__video {
    object-fit: cover;
    height: 100vh;
    width: 100%;
    autoplay: true;
    muted: true;
    playsinline: true;
  }

  /* Responsive image handling */
  img {
    max-width: 100%;
    height: auto;
  }

  /* Ensure touch targets are large enough */
  button, a, .nav__link, .link__btn {
    min-height: 44px;
    min-width: 44px;
  }

  /* Improve text readability on mobile */
  h1, h2, h3, h4, p {
    line-height: 1.4;
  }

  /* Adjust footer items on mobile */
  .footer__container .item {
    font-size: 12px;
    margin-bottom: 10px;
  }
}

/* Extra small devices (phones, 320px and up) */
@media (max-width: 480px) {
  /* Adjust font sizes for very small screens */
  .banner__box .container h1 {
    font-size: 32px;
  }

  .banner__box .container h2 {
    font-size: 18px;
  }

  .banner__box .container h3 {
    font-size: 12px;
    line-height: 18px;
  }

  .header__cta {
    display: none;
  }

  /* Make stats items even smaller on very small screens */
  .stat__item {
    height: 100px;
    padding: 20px 0;
  }

  .stat__item .stat__value {
    font-size: 28px;
  }

  .stat__item .stat__label {
    font-size: 14px;
  }

  /* Adjust padding for very small screens */
  .header {
    padding: 0 10px;
  }

  .banner__box .container {
    padding: 0 15px;
  }

  .main__box {
    padding: 0 10px;
  }

  /* Make buttons full width on very small screens */
  .btn--primary {
    width: 100%;
  }
}