* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #0b0f19;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  color: #ffffff;
}

.container {
  width: 1400px;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

/* 1. Hero Banner */
.hero-banner {
  position: relative;
  width: 100%;
  height: 80vh;
  overflow: hidden;
}

.hero-banner video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(11, 15, 25, 0.6) 0%, rgba(11, 15, 25, 0.8) 80%, #101c31 100%);
  z-index: 2;
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  text-align: center;
  width: 100%;
}

.hero-title {
  font-size: 62px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 30px;
  letter-spacing: 2px;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 20px;
  font-weight: 400;
  color: rgba(255, 255, 255, 1);
  margin-bottom: 50px;
  letter-spacing: 1px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.hero-btn {
  display: inline-block;
  background-color: #2f6fff;
  color: #ffffff;
  font-size: 20px;
  font-weight:500;
  padding: 20px 45px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  box-shadow: 0 4px 15px rgba(47, 111, 255, 0.4);
}

.hero-btn:hover {
  background-color: #4080ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(47, 111, 255, 0.6);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.scroll-indicator:hover {
  opacity: 1;
}

.mouse {
  width: 26px;
  height: 42px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 13px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background-color: #ffffff;
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 1.5s infinite;
}

@keyframes scroll {
  0% {
    top: 6px;
    opacity: 1;
  }
  100% {
    top: 18px;
    opacity: 0;
  }
}

/* 2. Success Cases */
.success-cases {
  margin-top: 0;
  padding-top: 80px;
  padding-bottom: 80px;
  text-align: center;
  background-color: #101c31;
}

.success-cases__header {
  margin-bottom: 40px;
}

.success-cases__title {
  font-size: 42px;
  font-weight: 700;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  color: #ffffff;
  margin-bottom: 10px;
}

.success-cases__subtitle {
  font-size: 20px;
  font-weight: 400;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  color: #90a1b9;
}

.success-cases__content {
  max-width: 1200px;
  margin: 0 auto;
}

.success-cases__video-display {
  width: 100%;
  height: 600px;
  background: #000;
  margin-bottom: 20px;
  border-radius: 4px;
  overflow: hidden;
}

.success-cases__video-display video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.success-cases__thumbnails {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.thumbnail-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 280px;
  cursor: pointer;
}

.thumbnail-wrapper .thumbnail {
  width: 100%;
  height: 158px;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  margin-bottom: 12px;
}

.thumbnail-wrapper .thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumbnail-wrapper .thumbnail.active,
.thumbnail-wrapper:hover .thumbnail {
  border-color: #2f6fff;
}

.thumbnail-caption {
  font-size: 16px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  font-weight: 400;
  color: #ffffff;
  text-align: center;
  line-height: 1.4;
}

/* 3. Core Functional Modules */
.core-modules {
  padding: 80px 0;
  background-color: #0a1628;
}

.core-modules__header {
  text-align: center;
  margin-bottom: 80px;
}

.core-modules__title {
  font-size: 42px;
  font-weight: 700;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  color: #ffffff;
  margin-bottom: 10px;
}

.core-modules__subtitle {
  font-size: 20px;
  font-weight: 400;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  color: #90a1b9;
}

.core-modules .module-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 120px;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 40px;
}

.core-modules .module-item:last-child {
  margin-bottom: 0;
}

/* Default: Left Text, Right Video (Odd items) */
.core-modules .module-item__content {
  width: 45%;
  padding-right: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.core-modules .module-item__icon {
  width: 57px;
  height: 57px;
  display: block;
  margin-bottom: 20px;
}

.core-modules .module-item__video-wrapper {
  width: 50%;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.core-modules .module-item__video-wrapper video {
  width: 100%;
  display: block;
  border-radius: 8px;
}

.core-modules .module-item__title {
  font-size: 38px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.core-modules .module-item__subtitle {
  font-size: 18px;
  font-weight: 400;
  color: #50a2ff;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  margin-bottom: 20px;
}

.core-modules .module-item__desc {
  font-size: 16px;
  line-height: 24px;
  color: rgba(255, 255, 255, 0.7);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.core-modules .module-item__desc ul {
  list-style: none;
  padding: 0;
}

.core-modules .module-item__desc ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
}

.core-modules .module-item__desc ul li::before {
  content: "•";
  color: rgba(255, 255, 255, 0.7);
  position: absolute;
  left: 0;
  top: 0;
}

.core-modules .module-item__decoration {
  display: block;
  margin-top: 30px;
  max-width: 100%;
  height: auto;
}

/* Zig-Zag: Even items (Right Text, Left Video) */
.core-modules .module-item:nth-child(even) {
  flex-direction: row-reverse;
}

.core-modules .module-item:nth-child(even) .module-item__content {
  padding-right: 0;
  padding-left: 40px;
}

/* 4. Partners Section */
.partners-section {
  padding: 80px 0;
  background-color: #0b182c;
}

.partners-section__header {
  text-align: center;
  margin-bottom: 60px;
}

.partners-section__title {
  font-size: 42px;
  font-weight: 700;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  color: #ffffff;
  margin-bottom: 10px;
}

.partners-section__subtitle {
  font-size: 20px;
  font-weight: 400;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  color: #90a1b9;
}

.partners-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.stat-card {
  background-color: rgba(20, 33, 54,1);
  border: 1px solid rgba(80, 162, 255, 0.2);
  border-radius: 8px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform 0.3s, border-color 0.3s;
  position: relative;
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(80, 162, 255, 0.5);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 10px;
  height: 10px;
  border-top: 2px solid rgba(80, 162, 255, 0.3);
  border-right: 2px solid rgba(80, 162, 255, 0.3);
  border-top-right-radius: 8px;
}

.stat-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  /* Placeholder style if image missing */
  object-fit: contain;
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  color: #50a2ff;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  margin-bottom: 10px;
  line-height: 1;
}

.stat-label {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.partner-card {
  background-color: rgba(13, 22, 36, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 25px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.partner-card:hover {
  background-color: rgba(80, 162, 255, 0.1);
  border-color: rgba(80, 162, 255, 0.3);
}

.partner-name {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
  text-align: center;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.partner-industry {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

/* 5. Booking Section */
.booking-section {
  padding: 80px 0 120px;
  background-color: #0a1628;
}

.booking-section__header {
  text-align: center;
  margin-bottom: 60px;
}

.booking-section__title {
  font-size: 42px;
  font-weight: 700;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  color: #ffffff;
  margin-bottom: 10px;
}

.booking-section__subtitle {
  font-size: 20px;
  font-weight: 400;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  color: #90a1b9;
}

.booking-content {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Left: Booking Form Card */
.booking-form-card {
  width: 60%;
  background-color: rgba(13, 22, 36, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 40px;
}

.form-row {
  display: flex;
  gap: 20px;
  margin-bottom: 25px;
}

.form-group {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  width: 100%;
  margin-bottom: 30px;
}

.form-group label {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.form-group input,
.form-group textarea {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 12px 16px;
  color: #90a1b9;
  font-size: 14px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
  transition: all 0.3s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.3);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #50a2ff;
  background-color: rgba(80, 162, 255, 0.05);
}

.submit-btn {
  width: 100%;
  background: linear-gradient(90deg, #2f6fff 0%, #1e5cdb 100%);
  color: #ffffff;
  border: none;
  padding: 16px 0;
  font-size: 16px;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.submit-btn:hover {
  background: linear-gradient(90deg, #4080ff 0%, #2f6fff 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(47, 111, 255, 0.3);
}

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

/* Right: Info & Why Us */
.booking-info-column {
  width: 40%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-card,
.why-us-card {
  background-color: rgba(13, 22, 36, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 30px;
}

.info-card-title {
  font-size: 20px;
  font-weight: 700;
  color: rgba(255, 255, 255, 1);
  margin-bottom: 25px;
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  border-left: 4px solid #50a2ff;
  padding-left: 12px;
  line-height: 1.2;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.contact-item {
  display: flex;
  align-items: center;
}

.contact-icon {
  width: 50px;
  height: 50px;
  margin-right: 15px;
  margin-top: 0;
  opacity: 0.8;
  object-fit: contain;
}

.contact-text {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 13px;
  color: rgba(144, 161, 185, 1);
  margin-bottom: 4px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.contact-value {
  font-size: 16px;
  color: rgba(255, 255, 255, 1);
  font-weight: 400;
  margin-bottom: 2px;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", SimHei, Arial, Helvetica, sans-serif;
}

.contact-value.highlight {
  font-size: 20px;
  font-weight: 700;
}

.contact-sub {
  font-size: 12px;
  color: rgba(144, 161, 185, 1);
}

.why-us-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.why-us-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 15px;
  font-size: 14px;
  color: rgba(144, 161, 185, 1);
  line-height: 1.6;
}

.why-us-list li:last-child {
  margin-bottom: 0;
}

.why-us-list li::before {
  content: "•";
  color: #50a2ff;
  font-size: 18px;
  position: absolute;
  left: 0;
  top: -2px;
}