html,
body {
  margin: 0;
  padding: 0;
}

html {
  width: 100vw;
  overflow: hidden scroll;
  scroll-behavior: smooth;
  scroll-padding: 120px;
}

body {
  position: relative;
  width: 100vw;
  overflow: hidden;
  padding-top: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
  /* 标准属性 */
  -moz-user-drag: none;
  /* Firefox */
  -ms-user-drag: none;
  /* IE/Edge */

  /* 防止选择和高亮 */
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

body::before {
  content: '';
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: rgba(219, 234, 254, 0.50);
  filter: blur(120px);
  position: absolute;
  top: -400px;
  z-index: 0;

}

body::after {
  content: '';
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: rgba(243, 232, 255, 0.40);
  filter: blur(100px);
  top: 256px;
  position: absolute;
  right: 0;
  z-index: 0;
}

button {
  cursor: pointer;
}

/* ::-webkit-scrollbar {
  width: 0rem;
} */

/** ------------------ 头部导航栏 ------------------- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  height: 104px;
  padding: 24px 140px;
  box-sizing: border-box;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
}

header>.header-wrapper {
  height: 56px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(247, 247, 247, 0.1);
  box-shadow: 0 4px 20px 0 rgba(193, 189, 189, 0.25) inset,
    0 4px 32px 0 rgba(155, 182, 208, 0.25);
  backdrop-filter: blur(50px);
  display: flex;
  padding: 8px 16px;
  justify-content: flex-start;
  align-items: center;
  flex-shrink: 0;
  width: 100%;
}

header>.header-wrapper>a>img {
  height: 32px;
  width: auto;
  object-fit: contain;
  display: block;
}

header>.header-wrapper>.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
  text-align: center;
  font-size: 16px;
  font-style: normal;
  font-weight: 400;
  line-height: 145%;
  /* 23.2px */
  letter-spacing: -0.08px;
  margin-left: 32px;
}

header>.header-wrapper>.nav-list a {
  transition: all .3s ease-in-out;
}

/* 英文导航自适应：缩小间距和字号防止折行 */
html[lang="en"] header>.header-wrapper>.nav-list {
  gap: 20px;
  font-size: 14px;
}

html[lang="en"] header>.header-wrapper>a>img {
  height: 28px;
}

html[lang="en"] .zh-only {
  display: none;
}

/* 英文模式下卡片列表自适应宽度，防止内容溢出 */
html[lang="en"] .section-item .section-item-card {
  height: fit-content;
}

html[lang="en"] .section-item .section-item-card .card-list {
  padding-bottom: 43px;
}

html[lang="en"] .section-item-card .card-list .card-list-item {
  width: auto;
  min-width: 452px;
  height: auto;
}

@media screen and (max-width: 1000px) {
  html[lang="en"] .section-item-card .card-list .card-list-item {
    min-width: 0;
  }
}

header>.header-wrapper>.nav-list a:hover,
header>.header-wrapper>.nav-list a.nav-active {
  color: #7166F0;
  transform: translateY(-2px);
}

header>.header-wrapper .free-use-button {
  display: flex;
  height: 40px;
  padding: 8px 16px;
  justify-content: center;
  align-items: center;
  border-radius: 20px;
  background: #1e1e27;
  cursor: pointer;
  color: #fff;
  white-space: nowrap;
  transition: all .3s ease-in-out;
}

header>.header-wrapper .header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  margin-left: auto;
}


header>.header-wrapper .free-use-button:hover {
  /* transform: scale(1.05); */
  box-shadow: 0 0 4px hsla(224, 47%, 11%, 0.411);
}

/** ------------------------- section ---------------------------- */
section {
  position: relative;
  max-width: 1280px;
  z-index: 2;
}

.section-banner-wrapper {
  min-width: 800px;
}

.section-banner-tag {
  display: flex;
  height: 32px;
  padding: 5px 16px;
  align-items: center;
  gap: 12px;
  border-radius: 19174000px;
  border: 0.571px solid #d1daff;
  background: rgba(255, 255, 255, 0.36);
  box-shadow: 0 1px 12.5px 0 rgba(134, 186, 253, 0.1),
    0 1px 6.4px -1px rgba(88, 159, 251, 0.1);
}

.section-banner-title {
  display: flex;
  justify-content: center;
  align-items: center;
  align-self: stretch;
  font-size: 56px;
  font-style: normal;
  font-weight: 700;
  line-height: 72px;
  flex-wrap: wrap;
  word-break: break-word;
}

.section-banner-subtitle {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 56px;
  font-style: normal;
  font-weight: 700;
  line-height: 72px;
  min-height: 72px;
}

.section-banner-subtitle .text-highlight {
  background: linear-gradient(90deg, #4780ff 0%, #7348ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.typing-cursor {
  color: #7348ff;
  animation: blink 1s infinite;
  font-weight: 400;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.section-banner-tip {
  color: #596f8e;
  text-align: center;
  font-size: 20px;
  font-style: normal;
  font-weight: 400;
  line-height: 28px;
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
}

.section-enter-input {
  display: flex;
  padding: 0 16px;
  align-items: center;
  gap: 8px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(226, 232, 240, 0.5),
    0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

.section-enter-input .file-button {
  display: flex;
  width: 36px;
  height: 36px;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #2b7fff 0%, #9810fa 100%);
  transition: all 0.2s ease-in-out;
}

.upload-filename {
  max-width: 200px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 4px 2px 8px;
  background-color: #5073ff3a;
  border-radius: 8px;
  color: #7F70F4;

}

.upload-filename>button {
  flex-shrink: 0;
  border-radius: 4px;
  transition: all .3s ease-in-out;
}

.upload-filename>button:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.upload-filename>div {
  flex-shrink: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section-enter-input>input {
  display: flex;
  height: 52px;
  padding: 12px;
  align-items: center;
  flex: 1 0 0;
  outline: none;
}

.section-enter-input .file-button:hover,
.section-enter-input .enter-button:hover {
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
  transform: scale(1.05);
}

.section-enter-input .enter-button {
  display: flex;
  width: 36px;
  height: 36px;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  background: #0f172b;
  transition: all 0.2s ease-in-out;
  flex-shrink: 0;

}

.section-enter-wrapper>.section-enter-tag {
  display: flex;
  align-items: center;
  gap: 22.5px;
}


.section-enter-wrapper>.section-enter-tag>div {
  display: flex;
  padding: 8px 16px;
  justify-content: center;
  align-items: center;
  border-radius: 18px;
  border: 1px solid #e2e8f0;
  box-sizing: border-box;
  background: #fff;
  color: #45556c;
  text-align: center;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  /* 142.857% */
  white-space: nowrap;
  transition: all 0.2s ease-in-out;
  cursor: pointer;
}

.section-enter-wrapper>.section-enter-tag>div:hover {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transform: scale(1.01);
}

.video-container {
  max-width: 1000px;
  border-radius: 11px;
  position: relative;
  /* overflow: hidden; */
  background: linear-gradient(135deg, #ee9ae5 0%, #5961f9 100%);
  left: 50%;
  transform: translateX(-50%);
}

.video-container .introduction-video {
  width: 100%;
  aspect-ratio: 1000 / 563;
  border-radius: 10.5px;
  -webkit-media-controls: none;
}

.video-container .introduction-video::-webkit-media-controls {
  display: none !important;
}

.video-container .introduction-video::-webkit-media-controls-start-playback-button {
  display: none !important;
}

.video-container .play-pause-btn {
  position: absolute;
  left: calc(50% - 20px);
  top: calc(50% - 20px);
  background: linear-gradient(135deg, #EE9AE5 0%, #5961F9 100%);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  visibility: hidden;
  padding: 8px;
}

.play-pause-btn:has(.play-icon.icon-active) {
  visibility: visible;
}

.video-container:hover .play-pause-btn:has(.pause-icon.icon-active) {
  visibility: visible;
}

.play-icon {
  opacity: 0.4;
  display: none;
  fill: #fff;
}

.pause-icon {
  opacity: 0.4;
  display: none;
  fill: #fff;
}

.play-pause-btn .icon-active {
  display: block;
}

.play-pause-btn:hover {
  transform: scale(1.2);
}

.video-container .introduction-video {
  width: calc(100% - 2px);
  height: calc(100% - 2px);
  margin: 1px;
}

.video-card {
  position: absolute;
  display: flex;
  max-width: 280px;
  width: fit-content;
  gap: 12px;
  height: 72px;
  padding: 0 16px;
  align-items: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 10px;
  /* box-shadow: 0 0 0 1px #5896D5, 0 20px 25px -5px rgba(93, 139, 246, 0.10), 0 8px 10px -6px rgba(154, 139, 252, 0.10); */
  top: 66px;
  right: -90px;
}

.hidden {
  display: none !important;
}

.video-card .video-card-logo {
  display: flex;
  width: 40px;
  height: 40px;
  padding-left: 0;
  justify-content: center;
  align-items: center;
  border-radius: 16px;
  background: radial-gradient(87.83% 127.36% at 76.57% 100%, #CDF0FF 3.27%, rgba(255, 255, 255, 0.05) 100%), linear-gradient(249deg, #DF9AFF 0%, rgba(255, 255, 255, 0.00) 100%), linear-gradient(69deg, #5B73FF 0%, rgba(255, 255, 255, 0.00) 100%), radial-gradient(87.83% 127.36% at 76.57% 100%, rgba(255, 255, 255, 0.05) 0%, #FFF 96.73%);
  background-blend-mode: multiply, normal, normal, normal;
}

.video-card .video-card-title {
  color: #0F172B;
  font-family: Arial;
  font-size: 14px;
  font-style: normal;
  font-weight: 700;
  line-height: 20px;
  /* 142.857% */
}

.video-card .video-card-desc {
  color: #596F8E;
  font-family: Arial;
  font-size: 12px;
  font-style: normal;
  font-weight: 400;
  line-height: 16px;
}

.section-statistics-wrapper {
  display: flex;
  max-width: 1280px;
  height: 134px;
  padding: 0 163px 0 163px;
  justify-content: center;
  align-items: center;
  gap: 150px;
}

.section-statistics-wrapper .statistics-item {
  display: flex;
  height: 64px;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.section-statistics-wrapper .statistics-item .statistics-item-num {
  color: #596f8e;
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  line-height: 40px;
  letter-spacing: -0.9px;
}

.section-statistics-wrapper .statistics-item .statistics-item-title {
  color: #90a1b9;
  text-align: center;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  padding-right: 8px;
}

.section-advantages-wrapper {
  height: 700px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.section-advantages-wrapper::before {
  content: "";
  border-radius: 50%;
  background: rgba(232, 245, 255, 0.4);
  filter: blur(100px);
  width: 600px;
  height: 600px;
  position: absolute;
  top: 5%;
}

.section-advantages-wrapper .advantages-title {
  color: #0f172b;
  text-align: center;
  font-size: 36px;
  font-style: normal;
  font-weight: 700;
  line-height: 44px;
}

.section-advantages-wrapper .advantages-desc {
  color: #596f8e;
  text-align: center;
  font-size: 20px;
  font-style: normal;
  font-weight: 400;
  line-height: 28px;
  /* 140% */
  letter-spacing: 2px;
}

.section-advantages-wrapper .advantages-box {
  width: 800px;
  height: 450px;
  flex-shrink: 0;
  position: relative;
}

.section-advantages-wrapper .advantages-box .advantages-bg {
  position: absolute;
  aspect-ratio: 698/640;
  width: 550px;
  /* left: 125px; */
  left: 160px;
  top: -58px;
}

.section-advantages-wrapper .advantages-box .advantages-item {
  position: absolute;
  display: flex;
  padding: 12px 24px 12px 12px;
  align-items: center;
  gap: 12px;
  border-radius: 16px;
  background-image: linear-gradient(to right, #fbfbfe, #fff);
  outline: 2px solid #fff;
  box-sizing: content-box;
  transition: all 0.3s ease-in-out;
  animation-play-state: running;

}

.section-advantages-wrapper .advantages-box .advantages-item:hover {
  transform: scale(1.1);
  animation-play-state: paused;
  box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
}

.advantages-item .advantages-item-icon {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  border-radius: 17.778px;
  background: #fff;
  box-shadow: 0 0 28px 0 rgba(97, 95, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantages-item-icon img {
  width: 32px;
}

.advantages-item .advantages-item-title {
  color: #0f172b;
  font-size: 20px;
  font-style: normal;
  font-weight: 500;
  line-height: 20px;
}

.advantages-item .advantages-item-desc {
  color: #596f8e;
  font-size: 14px;
  font-style: normal;
  font-weight: 400;
  line-height: 20px;
  margin-top: 12px;
}

.advantages-item.advantages-item-1 {
  top: 56px;
  left: 34px;
  width: 303px;
  animation: breathing 4s infinite ease-in-out 0.3s;
  /* height: 71px; */
}

.advantages-item.advantages-item-2 {
  top: 44px;
  left: 484px;
  width: 327px;
  animation: breathing 4s infinite ease-in-out 0.4s;
  /* height: 71px; */
}

.advantages-item.advantages-item-3 {
  bottom: 54px;
  left: -26px;
  width: 372px;
  animation: breathing 4s infinite ease-in-out 0s;
  /* height: 85px; */
}

.advantages-item.advantages-item-4 {
  bottom: 37px;
  left: 454px;
  width: 372px;
  animation: breathing 4s infinite ease-in-out 0.2s;
  /* height: 85px; */
}

.section-item {
  position: relative;
  padding: 0 40px;
}

.section-item .section-item-title {
  margin: 16px 0;
  color: #0f172b;
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  line-height: 44px;
}

.section-item .section-item-desc {
  padding-bottom: 16px;
  color: #596f8e;
  text-align: center;
  font-size: 20px;
  font-weight: 400;
  line-height: 28px;
  /* 140% */
  letter-spacing: 2px;
}

.section-item {
  margin-top: 36px;
}

.section-item .section-item-card.reverse-card {
  flex-direction: row-reverse;

}


.section-item .section-item-card {
  display: flex;
  height: 452px;
  padding: 0 32px;
  align-items: center;
  gap: 64px;
  flex-shrink: 0;
  border-radius: 16px;
  margin-top: 25px;
  position: relative;

}


.section-item .section-item-card .section-item-img {
  display: flex;
  flex-shrink: 0;
  width: 596px;
  height: 450px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1;
}



.section-item.study-and-explore .section-item-card {
  background: linear-gradient(95deg, #DAF1FF 6.88%, #FFF 56.04%, #FFF 66.02%, #F9FEFF 93.46%);
}

.section-item.document-manage .section-item-card::before,
.section-item.study-and-explore .section-item-card::before {
  content: '';
  width: 330px;
  height: 251px;
  position: absolute;
  background-image: url('../images/grid.svg');
  background-position: 0 0;
  background-repeat: no-repeat;
  left: 0;
  top: 0;
  z-index: 0;
}

.section-item.literature-review .section-item-card {
  background: linear-gradient(78deg, #FFF 59.01%, #DAECFF 95.16%);
}

.section-item.document-manage .section-item-card {
  background: linear-gradient(95deg, #DAF7FF 6.88%, #FFF 56.04%, #FFF 66.02%, #F9FEFF 93.46%);
}

.section-item.literature-library .section-item-card {
  background: linear-gradient(78deg, #FBFEFF 58%, #DAE8FF 95.16%);
}

.section-item.knowledge-base .section-item-card {
  background: linear-gradient(95deg, #EBFFFF 6.88%, #FFF 56.04%, #FFF 66.02%, #F9FEFF 93.46%);
}

.section-item.data-analysis .section-item-card {
  background: linear-gradient(78deg, rgba(223, 218, 255, 0.05) 58%, #DFDAFF 95.16%);
}

.section-item .section-item-card .section-item-img img {
  min-height: 100%;
  max-width: none;
}

.study-and-explore,
.literature-review,
.document-manage,
.literature-library,
.data-analysis,
.knowledge-base,
.section-item-img img {
  width: calc(100% + 64px);
}


.section-item .section-item-card .card-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
  padding-top: 43px;
}

.section-item-card .card-list .card-list-item {
  display: flex;
  padding: 12px;
  width: 452px;
  align-items: center;
  gap: 16px;
  align-self: stretch;
  border-radius: 12px;
  background: #FFF;
  transition: all .3s ease-in-out;
}

.section-item-card .card-list .card-list-item:hover {
  transform: translateX(4px);
  box-shadow: 0 2px 6px 4px rgba(0, 0, 0, .1);
}

.section-item-card .card-list .card-list-item-icon {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: #F7F9FF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 0;
}

.card-list-item-icon::before {
  content: '';
  width: 19px;
  height: 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(0.5px);
  position: absolute;
  z-index: -1;
  right: 7px;
  bottom: 4px;
}

.section-item-card .card-list .card-list-content {
  min-width: 0;
  flex: 1;
  overflow-wrap: break-word;
  word-break: break-word;
}

.section-item-card .card-list .content-title {
  color: #0F172B;
  font-size: 16px;
  font-weight: 500;
  line-height: 140%;
  letter-spacing: 0.32px;
}

.section-item-card .card-list .content-desc {
  color: #596F8E;
  font-size: 14px;
  font-weight: 350;
  line-height: 140%;
  letter-spacing: 0.28px;
  margin-top: 4px;
}

section.section-begin {
  width: 100vw;
  max-width: 100vw;
  left: 0;
  transform: translateX(0);
  height: 304px;
  min-height: 304px;
  background: linear-gradient(135deg, #c19ffc 0%, #7367f0 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 64px;
}

.section-begin-title {
  color: #fff;
  text-align: center;
  font-size: 36px;
  font-style: normal;
  font-weight: 700;
  line-height: 44px;
  /* 122.222% */
  margin-top: 62px;
  letter-spacing: 1px;
}

.section-begin-desc {
  margin-top: 16px;
  color: #eff6ff;
  text-align: center;
  font-size: 20px;
  font-style: normal;
  font-weight: 400;
  line-height: 28px;
  /* 140% */
}

.section-begin-button {
  width: fit-content;
  margin-top: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  border-radius: 28px;
  background: #A38FF7;
  box-shadow: 0 10px 15px -3px rgba(25, 14, 45, 0.1),
    0 4px 6px -4px rgba(35, 19, 62, 0.1);
  overflow: hidden;
  position: relative;
  padding: 2px;
  z-index: 1;
  width: 166px;
  transition: all .3s ease-in-out;
}

.section-begin-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px -3px rgba(25, 14, 45, 0.2),
    0 4px 10px -4px rgba(35, 19, 62, 0.2);
}

.section-begin-button button {
  width: 100%;
  height: 100%;
  padding: 16px 0;
  background: #A38FF7;
  border-radius: 27.5px;
  position: relative;
  z-index: 1;
  color: #FFF;
  text-align: center;
  font-size: 20px;
  font-weight: 500;
  line-height: 24px;
}

.section-begin-button button::before {
  content: "";
  width: calc(100% + 4px);
  height: 28px;
  background: #A38FF7;
  position: absolute;
  left: -1px;
  top: -1px;
  z-index: -1;
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
  box-shadow: inset 1px 2px 0 -1.5px #fff;

}

.section-begin-button button::after {
  content: "";
  width: calc(100% + 4px);
  height: 28px;
  background: #A38FF7;
  position: absolute;
  right: -1px;
  bottom: -1px;
  z-index: -1;
  border-bottom-left-radius: 28px;
  border-bottom-right-radius: 28px;
  box-shadow: inset -1px -2px 0 -1.5px #fff;
}

/** ------------------------------ footer ------------------------------- */
footer {
  display: flex;
  flex-direction: column;
  max-width: 1280px;
  width: 100%;
  padding: 48px 64px 24px;
}

footer .footer-main {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid #e2e8f0;
}

footer .footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

footer .footer-logo {
  height: 24px;
  object-fit: contain;
}

footer .footer-slogan {
  color: #596F8E;
  font-size: 14px;
  line-height: 150%;
  margin: 0;
}

footer .footer-links,
footer .footer-contact,
footer .footer-friends {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

footer .footer-links h4,
footer .footer-contact h4,
footer .footer-friends h4 {
  color: #0F172B;
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

footer .footer-links a,
footer .footer-friends a {
  color: #596F8E;
  font-size: 14px;
  text-decoration: none;
  transition: color .2s;
}

footer .footer-links a:hover,
footer .footer-friends a:hover {
  color: #3070FC;
}

footer .footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #596F8E;
  font-size: 14px;
}

footer .footer-contact-item a {
  color: #596F8E;
  text-decoration: none;
  transition: color .2s;
}

footer .footer-contact-item a:hover {
  color: #3070FC;
}

footer .footer-bottom {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  color: #737373;
  font-size: 14px;
}

footer .footer-bottom a {
  color: #737373;
  text-decoration: none;
  transition: color .2s;
}

footer .footer-bottom a:hover {
  color: #3070FC;
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 40px;
  width: 48px;
  height: 48px;
  padding: 12px;
  text-align: center;
  background-color: #7166F0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(113, 102, 240, 0.3);
  transition: all 0.3s ease-in-out;
  z-index: 10;
}

.back-to-top:hover {
  box-shadow: 0px 1px 16px rgba(113, 102, 240, 0.5);
}

.streamer-button {
  position: relative;
  overflow: hidden;
}

.streamer-button:hover::before {
  animation: streamer-animate var(--streamer-duration, .3s) ease-in-out;
}

.streamer-button::before {
  content: "";
  position: absolute;
  width: 80%;
  max-width: 40px;
  height: 200%;
  background-color: rgba(255, 255, 255, .1);
  transform-style: preserve-3d;
  transform: rotateZ(25deg);
  left: -100%;
  z-index: 2;
}

@keyframes streamer-animate {
  0% {
    left: -100%;
  }

  100% {
    left: 100%;
  }
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }

  50% {
    transform: rotate(180deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes breathing {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);

  }
}


@media screen and (max-width: 1200px) {
  header {
    padding: 12px 20px;
  }

  section {
    max-width: calc(100vw - 40px);
    padding: 0 20px;
  }

  .section-banner-wrapper {
    min-width: 0;
    width: 100%;
    overflow: visible;
  }

  .section-enter-wrapper {
    width: 100% !important;
    min-width: 0;
  }

  .section-item .section-item-card {
    justify-content: center;
    height: fit-content;
    padding-bottom: 32px;
    /* background: none !important; */
  }

  .section-statistics-wrapper {
    max-width: 100%;
    width: 100%;
    gap: initial;
    padding: 24px 0;
    justify-content: center;
    flex-wrap: wrap;
    height: fit-content;
  }

  .section-statistics-wrapper .statistics-item {
    width: 50%;
    flex-shrink: 0;
    padding: 12px 0;
    height: auto;
  }

  .video-container .video-card {
    display: none !important;
  }



  .section-banner-title,
  .section-banner-subtitle {
    font-size: min(5vw, 48px);
  }

  .section-item {
    position: relative;
    width: calc(100vw - 40px);
    padding: 0 20px;
  }

  .section-item .section-item-card {
    overflow: visible;
  }

  .section-item .section-item-card .section-item-img {
    display: none;
  }

  .section-enter-wrapper>.section-enter-tag {
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 20px;
  }

  .section-enter-wrapper>.section-enter-tag>div {
    padding: 8px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 100%;
  }

  .section-banner-tip {
    font-size: min(3vw, 36px);

  }

  section.section-begin {
    min-height: 304px;
    height: fit-content;
    padding-bottom: 64px;
  }

  footer {
    padding: 32px 20px;
  }

  footer .footer-main {
    flex-wrap: wrap;
    gap: 24px;
  }

  footer .footer-brand {
    max-width: 100%;
  }

  footer .footer-bottom {
    flex-wrap: wrap;
    gap: 12px;
  }
}

@media screen and (max-width: 1000px) {
  header>.header-wrapper>.nav-list {
    display: none;
  }

  .section-advantages-wrapper {
    padding: 0;
    width: calc(100vw - 40px);
    height: fit-content;
  }


  .section-advantages-wrapper .advantages-bg {
    display: none;
  }

  .section-advantages-wrapper .advantages-box {
    height: fit-content;
    width: fit-content;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
  }

  section.section-item .section-item-card {
    display: flex;
    flex-direction: column !important;
    height: fit-content !important;
    flex-shrink: 1;
    padding: 0 12px 32px 12px;
    gap: 0;
  }

  .section-item .section-item-card::before {
    display: none;
  }

  section.section-item .section-item-card .card-list {
    width: 100%;
    padding: 0 20px !important;
  }

  section.section-item .section-item-card .card-list li {
    width: 100%;
    max-width: none;
  }

  .section-item-card .card-list .card-list-item {
    width: auto;
    min-width: 0;
  }

  .section-advantages-wrapper .advantages-box .advantages-item {
    position: relative;
    left: initial;
    top: 0;
    width: calc(100% - 40px);
    overflow: hidden;
    animation: none;
    margin: 20px 0;

  }
}

@media screen and (max-width: 750px) {
  footer {
    padding: 24px 16px;
  }

  footer .footer-main {
    flex-direction: column;
    gap: 24px;
  }

  footer .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }

  section.section-item .section-item-card {
    padding-top: 32px !important;
    height: fit-content !important;
  }

  section.section-item .section-item-card .card-list li {
    width: 100% !important;
    max-width: 100% !important;
  }

  .section-item .section-item-card::before {
    display: none;
  }

  .section-item .section-item-card .section-item-img {
    display: none;
  }
}

/* 语言切换按钮 */
.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: #3070FC;
  cursor: pointer;
  transition: all .3s ease-in-out;
  flex-shrink: 0;
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

/* 语言下拉菜单 */
.lang-dropdown {
  position: relative;
  display: inline-block;
}

.lang-dropdown-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  color: #3070FC;
  cursor: pointer;
  transition: all .3s ease-in-out;
  flex-shrink: 0;
}

.lang-dropdown-trigger:hover {
  background: rgba(255, 255, 255, 0.8);
}

.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 148px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 12px;
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all .25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
}

.lang-dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: #596F8E;
  transition: all .2s ease;
  white-space: nowrap;
}

.lang-dropdown-item:hover {
  background: rgba(113, 102, 240, 0.08);
  color: #7166F0;
}

.lang-dropdown-item.active {
  color: #7166F0;
  font-weight: 500;
}

.lang-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: transparent;
  flex-shrink: 0;
  transition: background .2s ease;
}

.lang-dropdown-item.active .lang-dot {
  background: #7166F0;
}