body {
  padding-top: 90px;
}

header {
  position: fixed;
  top: 0;
  padding-top: 20px;
  width: 100%;
  z-index: 9999;
  background-color: rgba(255, 255, 255, 0.7);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  padding-bottom: 20px;
}

#header-container {
  height: 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#logo-img {
  height: 170%;
  max-height: 85px;
  width: auto;
}

.nav-btn {
  background-color: transparent;
  border: none;
  text-decoration: none;
  display: inline-block;
  font-size: 18px;
  border-radius: 5px;
  padding: 10px 20px;
}

.nav-btn:hover {
  background-color: rgb(245, 245, 245);
}

#banner {
  width: 100%;
  height: 600px;
  background-image: url("../assets/cover.jpg");
  background-repeat: none;
  background-position: center;
  background-size: cover;
  /* display: relative; */
  position: relative;
}

#app-description {
  margin-bottom: 30px;
}

.platforms-wrapper {
  position: relative;
  max-width: 750px;
  margin: auto;
}

#platforms-img {
  width: 100%;
  transform: translate(11%, 0);
}

#neon-label {
  position: absolute;
  top: 10%;
  right: 0;
  perspective: 1000px;
  cursor: pointer;
}

.hologram-effect {
  position: relative;
  transform-style: preserve-3d;
  animation: hologramFloat 3s ease-in-out infinite;
}

.ai-title {
  font-family: "Orbitron", sans-serif;
  font-size: 2.8rem;
  color: #00f3ff;
  text-shadow: 0 0 15px #00f3ff, 0 0 30px #00f3ff,
    0 0 45px rgba(0, 243, 255, 0.5);
  line-height: 1;
  display: block;
  position: relative;
  z-index: 2;
  background: linear-gradient(90deg, #00f3ff 20%, #ff00ff 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textFlow 4s linear infinite;
}

.neon-status {
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.signal-dot {
  width: 14px;
  height: 14px;
  background: #00ff87;
  border-radius: 50%;
  box-shadow: 0 0 15px #00ff87;
  animation: signalPulse 1.5s ease-out infinite;
}

.neon-status span {
  font-family: "Rajdhani", sans-serif;
  color: #00f3ff;
  font-size: 1.4rem;
  text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

@keyframes hologramFloat {
  0%,
  100% {
    transform: translateY(0) rotateX(0deg);
  }
  50% {
    transform: translateY(-10px) rotateX(5deg);
  }
}

@keyframes textFlow {
  to {
    background-position: 200% 0;
  }
}

@keyframes signalPulse {
  0% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
  100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
}

/* 全息投影光线效果 */
.hologram-effect::before {
  content: "";
  position: absolute;
  top: -15px;
  left: -20px;
  right: -20px;
  bottom: -15px;
  background: repeating-linear-gradient(
    45deg,
    transparent 0px,
    transparent 2px,
    rgba(0, 243, 255, 0.1) 3px,
    rgba(0, 243, 255, 0.1) 5px
  );
  z-index: 1;
  mix-blend-mode: screen;
  animation: scanLines 0.8s linear infinite;
}

@keyframes scanLines {
  from {
    transform: translateY(-10px);
  }
  to {
    transform: translateY(0);
  }
}

#banner-container {
  color: black;
  padding: 0;
  height: 100%;
}

.banner-sections {
  width: 50%;
  padding: 50px;
}

#banner-left {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#banner-text {
  padding: 30px;
  background-color: rgba(255, 187, 0, 0.9);
  border-radius: 10px;
  text-align: center;
}

#banner-text-mobile {
  display: none;
  padding: 10px;
  background-color: rgba(255, 187, 0, 0.9);
  text-align: center;
}

.banner-bi {
  font-size: 3rem;
  color: rgb(255, 255, 255);
  margin: 30px;
}

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

.downloads-title {
  margin-top: 40px;
  display: flex;
  justify-content: space-around;
}

#downloads-mobile {
  display: none;
  text-align: center;
  margin-top: 30px;
}

.platform-icon {
  font-size: 5em;
}

.platform-download {
  text-align: center;
}

.bi-microsoft {
  color: rgb(0, 120, 212);
}

.bi-apple {
  color: rgb(179, 179, 179);
}

.bi-android2 {
  color: rgb(164, 198, 57);
}

#instruction-container {
  display: flex;
  justify-content: center;
  margin-top: 50px;
}

#instruction {
  width: 100%;
  max-width: 315px;
  display: flex;
  /* justify-content: space-around; */
  align-items: center;
  border: 1px solid rgb(172, 172, 172);
  border-radius: 5px;
  padding-left: 10px;
  padding-right: 10px;
  box-sizing: border-box;
}

.bi-file-earmark-pdf-fill {
  color: rgb(255, 0, 0);
  font-size: 3em;
  margin-right: 10px;
}

.progress {
  height: 30px;
  border-radius: 15px;
  font-size: 1.5em;
}
.progress-bar {
  text-align: right;
  padding-right: 10px;
}

.margin-section {
  margin-top: 150px;
}

.margin-block {
  margin-top: 50px;
}

.margin-row {
  margin-top: 20px;
}

/* #news-section {
  max-width: 1000px;
} */

.news-date {
  font-size: 0.9em;
  color: rgb(100, 100, 100);
}

.news-title {
  /* max-width: 700px; */
  max-width: calc(100% - 85px);
}

/* #course-section {
    
} */

#faq-hidden {
  display: none;
}

#classroom {
  width: 100%;
  height: 600px;
  background-image: url("../assets/web_classroom.jpg");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  border-radius: 15px;
  box-sizing: border-box;
  padding-top: 120px;
  padding-left: 100px;
  display: flex;
}

#classroom div {
  margin-right: 5px;
}

#classroom img {
  margin-top: 20px;
  border-radius: 5px;
}

.course-titles {
  font-size: 2em;
  color: rgba(0, 0, 0, 0.75);
}

.left-and-right {
  display: flex;
  justify-content: space-evenly;
  height: 500px;
}

.sub-container {
  width: 50%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.side-intro {
  /* height: 100%; */
  width: 50%;
}

#book-covers {
  /* height: 100%; */
  width: 50%;
}

#book-cover-nav-container {
  display: inline-block;
  max-width: 470px;
  padding: 20px;
}

.book-cover-nav-img {
  width: 100px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  margin: 3px;
  cursor: pointer;
}

.book-cover-nav-img:hover {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.question-nums {
  display: inline-block;
  vertical-align: top;
  width: 300px;
}

.question-num-box {
  display: inline-block;
  vertical-align: top;
  width: 50px;
  height: 50px;
  border: 1px solid goldenrod;
  border-radius: 5px;
  margin: 10px;
  cursor: pointer;
  overflow: hidden;
}

.question-current-box {
  border: 2px solid rgb(0, 162, 255);
  /* background-color: rgb(236, 236, 236); */
}

.question-num-inner {
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.question-panel {
  display: inline-block;
  vertical-align: top;
  width: calc(100% - 450px);
  padding-top: 10px;
}

.question-nav-container {
  width: 100%;
  display: flex;
  justify-content: center;
  /* align-items: center; */
}

.question-nav {
  width: 100%;
  max-width: 400px;
  display: flex;
  justify-content: space-between;
}

.green-bg {
  background-color: rgb(0, 200, 0);
  border: 0;
}

.red-bg {
  background-color: rgb(255, 125, 125);
  border: 0;
}

.question-btns {
  display: inline-block;
  width: 150px;
  padding-top: 10px;
  box-sizing: border-box;
}

.question-option {
  margin: 20px;
}

.vocab-sub-sections {
  margin-top: 50px;
  text-align: center;
  min-height: 300px;
}

.vocab-example-container {
  display: grid;
  place-items: center;
}

.vocab-example {
  text-align: left;
  padding-left: 10px;
  max-width: 800px;
  border-left: 3px solid rgb(255, 192, 8);
  /* color: rgb(255,192,8); */
}

.vocab-cn {
  font-size: 2rem;
}

.vocab-example b {
  color: goldenrod;
  font-weight: 400;
}

.vocab-options {
  display: grid;
  place-items: center;
}

.vocab-option {
  width: 400px;
  height: 80px;
  margin: 5px;
  padding-left: 30px;
  border: 1px solid rgb(220, 220, 220);
  border-radius: 5px;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.vocab-option:hover {
  background-color: rgb(240, 240, 240);
}

.vocab-input {
  width: 300px;
  font-size: 2rem;
  font-weight: 300;
}

.input-hin-container {
  width: 300px;
  text-align: left;
}

.input-hint {
  margin-top: 10px;
  margin-left: 1rem;
  font-size: 1.8rem;
  color: rgb(179, 179, 179);
}

#vocab-container {
  border: 1px solid goldenrod;
  border-radius: 5px;
  height: 100%;
  width: 350px;
}

.service-icon-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.gray-text {
  color: rgb(80, 80, 80);
}

.service-icon {
  display: inline-block;
  width: 200px;
  height: 230px;
  background-color: rgb(240, 240, 240);
  border-radius: 5px;
  cursor: pointer;
  margin: 10px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.service-icon-img {
  width: 100%;
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
}

.service-name {
  text-align: center;
}

footer {
  /* height: 400px; */
  background-color: rgb(255, 165, 0);
  padding-bottom: 50px;
}

#footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

footer section {
  width: 200px;
}

footer section:nth-child(2) {
  width: 400px;
  margin: 0 20px;
}

#footer-info-container {
  /* width: 400px; */
  display: flex;
  /* justify-content: center; */
  align-items: center;
  flex-direction: column;
  color: rgb(25, 25, 25);
  padding-top: 30px;
}

/* #footer-logo {
    width: 150px;
    margin-bottom: 15px;
} */

.footer-title {
  margin-top: 45px;
  margin-bottom: 20px;
}

.footer-qrcode {
  border-radius: 5px;
  margin-bottom: 15px;
}

.google-map {
  position: relative;
  width: 100%;
  max-width: 400px;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  overflow: hidden;
}

.google-map iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#phone-email-container {
  width: 180px;
  height: 180px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background-color: #fff;
  border-radius: 5px;

  display: none;
  margin: auto;
  margin-bottom: 15px;
}

.foot-catelog {
  margin-bottom: 7px;
}

.copyright {
  margin-top: 20px;
  text-align: center;
}

#copyright-p {
  margin-bottom: 0;
}

.mobile-only {
  color: red;
  display: none;
}

#mobile-header-text {
  display: none;
}

.toast-download-text {
  margin-top: 20px;
  font-size: 0.85em;
  opacity: 0.75;
}

#news-banner {
  width: 100%;
  height: 200px;
  background-image: url("../assets/cover2.jpg");
  background-repeat: none;
  background-position: center;
  background-size: cover;
}

#news-view {
  max-width: 1000px;
  margin: auto;
  margin-top: 30px;
  min-height: calc(100vh - 870px);
}

.news-content {
  /* max-width: 1000px;
    margin: auto; */
  margin-top: 60px;
}

#news-breadcrumb {
  margin-bottom: 50px;
}

.ai-btn {
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.8);
  transition: transform 0.3s ease-in-out;
  animation: glow 4.5s infinite linear;
}

@keyframes glow {
  0% {
    box-shadow: 0 0 10px hsl(0, 100%, 50%, 0.8), 0 0 20px hsl(0, 100%, 50%, 0.5);
  }
  33% {
    box-shadow: 0 0 10px hsl(120, 100%, 50%, 0.8),
      0 0 20px hsl(120, 100%, 50%, 0.5);
  }
  66% {
    box-shadow: 0 0 10px hsl(240, 100%, 50%, 0.8),
      0 0 20px hsl(240, 100%, 50%, 0.5);
  }
  100% {
    box-shadow: 0 0 10px hsl(0, 100%, 50%, 0.8), 0 0 20px hsl(0, 100%, 50%, 0.5);
  }
}

.offcanvas-title {
  font-family: "Arial", sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  background: linear-gradient(
    90deg,
    #00ffff 0%,
    #329dff 25%,
    #7a6fff 50%,
    #ff46d7 75%,
    #ff6767 100%
  );
  background-size: 200% auto;
  color: transparent;
  background-clip: text;
  -webkit-background-clip: text;
  text-shadow: 0 0 15px rgba(0, 255, 255, 0.3), 0 0 30px rgba(50, 157, 255, 0.3),
    0 0 45px rgba(122, 111, 255, 0.3);
  animation: gradientFlow 3s linear infinite,
    pulseGlow 1.5s ease-in-out infinite alternate;
  position: relative;
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(0, 255, 255, 0.2);
  border-radius: 4px;
}

@keyframes gradientFlow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

@keyframes pulseGlow {
  0% {
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3),
      0 0 20px rgba(50, 157, 255, 0.3), 0 0 30px rgba(122, 111, 255, 0.3);
    transform: scale(1);
  }
  100% {
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.6),
      0 0 40px rgba(50, 157, 255, 0.6), 0 0 60px rgba(122, 111, 255, 0.6);
    transform: scale(1.02);
  }
}

#galary-section .galary-img {
  border: 1px solid #c4c4c4;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 4px;
  background: #fff;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
#galary-section .row {
  margin-left: 0;
  margin-right: 0;
}
@media (max-width: 767.98px) {
  #galary-section .row.row-cols-3 > .col {
    flex: 0 0 33.3333%;
    max-width: 33.3333%;
    padding-left: 2px;
    padding-right: 2px;
  }
  #galary-section .galary-img {
    max-width: 100%;
    height: auto;
  }
}