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

body {
  font-family: -apple-system, BlinkMacSystemFont, " PingFang SC", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: #262626;
  line-height: 1.6;
  background: #FAFBFF;
  position: relative;
  overflow-x: hidden;
}

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

/* 高亮文本 */
.lg-font {
  color: #1f8aff;
}

/* 导航栏 */
header {
  background-color: rgba(255, 255, 255, 0.5);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: backdrop-filter 0.3s ease;
}

header.header-blur {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.bg {
  /* 整体灰色基底；渐变使用伪元素实现以兼容更多浏览器 */
  background-image: url('img/bg.png');
  background-repeat: no-repeat;
  background-size: 100% auto;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo-container {
  display: flex;
  align-items: center;
  justify-content: start;
}

.logoImg {
  width: 35px;
  height: 35px;
  margin-right: 10px;
  display: block;
}

.logo {
  font-size: 24px;
  font-weight: 900;
  color: #262626;
  text-decoration: none;
  display: block;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
}

.nav-links li {
  margin-left: 24px;
}

.nav-links .active {
  box-sizing: border-box;
  background: linear-gradient(90deg, #1F8AFF 0%, #1CAEFF 100%);
  border-radius: 8px;
}

.nav-links .active a {
  color: #FFFFFF;
  font-size: 14px;
  height: 30px;
  line-height: 30px;
  display: inline-block;
  padding: 0px 9px;

}

.nav-links a {
  font-family: PingFang SC, PingFang SC-Regular;
  font-size: 14px;
  text-decoration: none;
  color: #262626;
  font-size: 14px;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #1a73e8;
}

.nav-links .active a:hover {
  color: #fff;
}

/* 英雄区 */
.hero {
  padding: 42px 70px 0 64px;
  background-size: 100%;
  margin-top: 68px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: flex;
  justify-content: center;
}


.hero h1 {
  font-family: PingFang SC, PingFang SC;
  font-weight: 600;
  font-size: 42px;
  color: #262626;
  padding-top: 50px;
}

.hero .hero-content .hero-tips {
  font-family: PingFang SC, PingFang SC;
  font-weight: 400;
  font-size: 20px;
  color: #4E6181;
  margin: 16px 0 100px;
}

.hero .container .video-box video {
  height: 380px;
  width: 636px;
}

/* 大屏幕 */
@media (min-width: 1200px) {
  .hero .container {
    gap: 60px;
  }

  .hero h1 {
    font-size: 40px;
  }
}

/* 超大屏幕 */
@media (min-width: 1400px) {
  .hero .container {
    gap: 80px;
  }
}

/* 超超大屏幕 */
@media (min-width: 1600px) {
  .hero .container {
    gap: 120px;
  }
}

.btn-primary {
  background: linear-gradient(90deg, #1F8AFF 0%, #1CAEFF 100%);
  border-radius: 12px;
  color: white;
  border: none;
  padding: 8px 18px;
  font-size: 16px;
  font-family: PingFang SC, PingFang SC;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.3s;
}

.btn-secondary {
  background: #fff;
  color: #262626;
  border-radius: 12px;
  border: none;
  padding: 8px 18px;
  font-size: 16px;
  font-family: PingFang SC, PingFang SC;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  margin-left: 20px;
}

/* 核心功能点 */
.cores .container {
  display: flex;
  justify-content: center;
}

.core-grid {
  display: flex;
  gap: 48px;
  align-items: center;
  height: 353px;
}

.core-item {
  position: relative;
  width: 353px;
  height: 165px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid #FFFFFF;
  border-radius: 20px;
  padding: 32px 40px 32px 40px;
  box-sizing: border-box;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  overflow: visible;
}

.core-item:hover {
  width: 353px;
  height: 213px;
  transform: scale(1.05);
  background: transparent;
  border-color: transparent;
}

.core-item::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  /* 调整渐变角度以更贴合 UI 设计 */
  background: linear-gradient(135deg, #C5C6FC 0%, #EBEEFF 54.33%, #D7D9FF 100%);
  border-radius: 20px;
  transform: translate(-50%, -50%);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 0;
}

.core-grid .core-item:nth-child(1)::before {
  background: linear-gradient(135deg, #a9f4e5 0%, #e6f7f7 54%, #b4fcf1 100%);
}

.core-grid .core-item:nth-child(2)::before {
  background: linear-gradient(135deg, #aadefc 0%, #e8f5fd 54%, #b1dcf8 100%);
}

.core-grid .core-item:nth-child(3)::before {
  background: linear-gradient(135deg, #C5C6FC 0%, #EBEEFF 54.33%, #D7D9FF 100%);
}

.core-item:hover::before {
  width: 100%;
  height: 100%;
}

.core-icon {
  position: absolute;
  top: -30px;
  right: 8px;
  z-index: 2;
}

.core-item .core-title,
.core-item .core-text {
  position: relative;
  z-index: 2;
}

.core-title {
  font-family: PingFang SC;
  font-weight: 600;
  font-size: 22px;
  color: #000000;
  margin-bottom: 22px;
}

.core-text {
  font-size: 14px;
  color: #4E6181;
  margin-top: 8px;
}

/* 特点区块 */
.features {
  padding: 80px 0;
  text-align: center;
}

.features-grid .feature-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* margin: 24px; */
}

.features-grid .feature-card .left {
  width: 50%;
  /* height: 550px; */
  background-image: url('./img/hxgn/sslybg.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
  background-position: 0px 38px;
  padding: 80px 0;
  display: flex;
  align-items: center;
  justify-content: end;
}

.features-grid .feature-card .left img {
  width: 90%;
  /* height: 418px; */
  object-fit: cover;
}

.features-grid .feature-card .right {
  width: 50%;
  background: #F1F8FF;
  text-align: left;
  padding: 48px;
}

.features-grid .feature-card .right .title {
  color: #000000;
  font-family: "PingFang SC";
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
  box-sizing: border-box;
  position: relative;
}

.features-grid .feature-card .right .title-img {
  position: absolute;
  left: 36px;
  top: -6px;
  width: 91.31px;
  height: 57.94px;
  stroke-width: 4px;
  stroke: #FFF;
}

.features-grid .feature-card .right .right-list {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 24px;
}

.features-grid .feature-card .right .right-item {
  width: calc(50% - 16px);
  box-sizing: border-box;
}

.features-grid .feature-card .right .right-item .right-item-title {
  color: #000000;
  font-family: "PingFang SC";
  font-size: 22px;
  font-style: normal;
  font-weight: 900;
  line-height: 36px;
}

.features-grid .feature-card .right .right-item .right-item-desc {
  color: #000000;
  font-family: "PingFang SC";
  font-size: 16px;
  font-style: normal;
  font-weight: 400;
  line-height: 36px;
  margin-top: 16px;
}

.section-title {
  font-size: 32px;
  margin-bottom: 60px;
  color: #1a237e;
  /* position: relative; */
  /* text-align: center; */
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.titleLeft,
.titleRight {
  height: 12px;
  margin-top: 4px;
}

/* 问题区、核心功能介绍区和用户评价区标题左右圆点 */
#questions .questions-title,
#features .questions-title,
#testimonials .questions-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

#questions .title-dots,
#features .title-dots,
#testimonials .title-dots {
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 0;
}

#questions .title-dots.title-right,
#features .title-dots.title-right,
#testimonials .title-dots.title-right {
  flex-direction: row-reverse;
}

#questions .title-dots i,
#features .title-dots i,
#testimonials .title-dots i {
  display: inline-block;
  border-radius: 50%;
  background: #1F8AFF;
}

/* 大到小，逐渐变淡（从外侧到内侧）——左侧顺序即 DOM 顺序，右侧通过 row-reverse 翻转 */
#questions .title-dots i:nth-child(1),
#features .title-dots i:nth-child(1),
#testimonials .title-dots i:nth-child(1) {
  width: 5px;
  height: 5px;
  opacity: 0.4;
  background: #1CAEFF;
}

#questions .title-dots i:nth-child(2),
#features .title-dots i:nth-child(2),
#testimonials .title-dots i:nth-child(2) {
  width: 6px;
  height: 6px;
  opacity: 0.55;
  background: #1CAEFF;
}

#questions .title-dots i:nth-child(3),
#features .title-dots i:nth-child(3),
#testimonials .title-dots i:nth-child(3) {
  width: 7px;
  height: 7px;
  opacity: 0.7;
  background: #1CAEFF;
}

#questions .title-dots i:nth-child(4),
#features .title-dots i:nth-child(4),
#testimonials .title-dots i:nth-child(4) {
  width: 8px;
  height: 8px;
  opacity: 0.85;
}

#questions .title-dots i:nth-child(5),
#features .title-dots i:nth-child(5),
#testimonials .title-dots i:nth-child(5) {
  width: 9px;
  height: 9px;
  opacity: 1;
}

#questions .questions-text,
#features .questions-text,
#testimonials .questions-text {
  font-weight: 600;
  font-size: 36px;
  color: #262626;
}

/* 问题轮播卡片 */
/* 横向轮播图样式 */
.tabs-container {
  overflow: hidden;
  width: calc(100% - 140px);
  position: relative;
  padding: 20px 0;
  cursor: grab;
  margin: 0 70px;
  /* 添加左右渐变蒙版 */
  mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
  /* 禁止文本选中 */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 更高级的边缘模糊效果 */
.tabs-container::before,
.tabs-container::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  z-index: 1;
  pointer-events: none;
}

.tabs-container::before {
  left: 0;
  background: linear-gradient(to right, rgba(250, 251, 255, 1) 0%, rgba(250, 251, 255, 0) 100%);
}

.tabs-container::after {
  right: 0;
  background: linear-gradient(to left, rgba(250, 251, 255, 1) 0%, rgba(250, 251, 255, 0) 100%);
}

.tabs {
  display: flex;
  gap: 48px;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
  /* 在拖动时使用更流畅的过渡 */
  transition-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  /* 禁止文本选中 */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.tabs:active {
  cursor: grabbing;
}

.tab-content {
  flex: 0 0 auto;
  width: 370px;
  height: 250px;
  padding: 32px 26px;
  box-shadow: 0px 0px 20px 0px rgba(193, 211, 231, 0.15);
  background: #FFFFFF;
  border-radius: 20px;
  box-sizing: border-box;
  transition: transform 0.4s ease, opacity 0.4s ease;
  /* 禁止文本选中 */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 非活动项的样式调整 */
.tabs-container:not(:hover) .tab-content {
  opacity: 0.85;
}

/* 当前活动项的样式调整 */
.tabs-container:not(:hover) .tab-content:first-child {
  opacity: 1;
  transform: scale(1.02);
}

.question-content {
  display: flex;
  flex-direction: column;
}

.question-icon {
  width: 42px;
  height: 42px;
}

.question-title {
  margin: 38px 0 18px;
  font-weight: 600;
  font-size: 20px;
  color: #262626;
}

.question-desc {
  font-weight: 500;
  font-size: 14px;
  color: #8999B5;
}



.title-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.title-dots i {
  display: block;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(28, 174, 255, 1), rgba(31, 138, 255, 1));
}

.title-dots.left {
  flex-direction: row-reverse;
}

.title-dots.left i:nth-child(1),
.title-dots.right i:nth-child(1) {
  width: 9px;
  height: 9px;
  background: linear-gradient(135deg, rgba(31, 138, 255, 1), rgba(28, 174, 255, 1));
  opacity: 1;
}

.title-dots.left i:nth-child(2),
.title-dots.right i:nth-child(2) {
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, rgba(31, 138, 255, 0.85), rgba(28, 174, 255, 0.85));
  opacity: 0.85;
}

.title-dots.left i:nth-child(3),
.title-dots.right i:nth-child(3) {
  width: 7px;
  height: 7px;
  background: linear-gradient(135deg, rgba(31, 138, 255, 0.7), rgba(28, 174, 255, 0.7));
  opacity: 0.7;
}

.title-dots.left i:nth-child(4),
.title-dots.right i:nth-child(4) {
  width: 6px;
  height: 6px;
  background: linear-gradient(135deg, rgba(31, 138, 255, 0.55), rgba(28, 174, 255, 0.55));
  opacity: 0.55;
}

.title-dots.left i:nth-child(5),
.title-dots.right i:nth-child(5) {
  width: 5px;
  height: 5px;
  background: linear-gradient(135deg, rgba(31, 138, 255, 0.4), rgba(28, 174, 255, 0.4));
  opacity: 0.4;
}

.section-text {
  font-size: 28px;
  font-weight: 600;
  color: #1a237e;
}


.feature-icon {
  /* font-size: 40px; */
  width: 60px;
  color: #1a73e8;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 26px;
  margin-bottom: 15px;
  color: #262626;
}

.feature-desc {
  color: #898989;
  font-size: 18px;
}

/* 核心功能 */
.core-functions {
  padding: 80px 0;
  background-color: white;
}

/* 用户评价 */
.testimonials {
  padding: 80px 0;
  background-color: #E6F2FF;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 24px;
}

.testimonial-card {
  background-color: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(26, 115, 232, 0.1), transparent);
  transition: 0.5s;
}

.testimonial-card:hover::before {
  left: 100%;
}

.testimonial-card .testimonial-header {
  display: flex;
  justify-content: start;
  gap: 16px;
}

.testimonial-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #e0e0e0;
  margin: 0 0 20px;
}

.testimonial-text {
  color: #666;
  margin-bottom: 20px;
  line-height: 1.8;
}

.testimonial-name {
  font-weight: 500;
  color: #262626;
  font-size: 20px;
}

.testimonial-company {
  color: #888;
  font-size: 16px;
}

.testimonial-rating {
  color: #ffc107;
  margin-top: 24px;
  text-align: right;
}

/* 用户来源 */
.users {
  padding: 80px 0;
  text-align: center;
}

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

.university-logo {
  width: 100px;
  height: 100px;
  background-color: white;
  border-radius: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  font-size: 12px;
  font-weight: bold;
  transition: transform 0.3s;
  position: relative;
  overflow: hidden;
}

.university-logo::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(26, 115, 232, 0.1), transparent);
  transition: 0.5s;
}

.university-logo:hover::before {
  left: 100%;
}

/* 页脚 */
footer {
  background-color: #061323;
  color: white;
  padding: 50px 0 20px;
}


.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 60px;
  max-width: 1400px;
  margin: 0 auto;
}

.footer-tips {
  margin-top: 36px;
  color: #ffffff99;
  text-align: center;
  font-family: "PingFang SC";
  font-size: 14px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;

}

.footer-column-content {
  display: flex;
  justify-content: center;
  align-items: start;
  gap: 60px;
}

.footer-column1-content {
  display: flex;
  justify-content: end;
  align-items: center;
  gap: 20px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
  color: white;
}

.footer-brand .footer-logo-img {
  width: 60px;
  height: 60px;
}

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

.footer-column1 {
  text-align: left;
}

.footer-column .footer-title {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 20px;
  color: white;
}

.footer-links {
  list-style: none;
  margin-top: 24px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: white;
}

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

.footer-qrcode img {
  width: 100px;
  height: 100px;
  padding: 8px;
  border-radius: 8px;
  margin-bottom: 10px;
}

.footer-qrcode p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* 科技感增强样式 */
*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

*::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #ebeced, #ebeced);
  border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #ebeced, #ebeced);
}

/* 光效动画 */
@keyframes glow {
  0% {
    box-shadow: 0 0 5px rgba(26, 115, 232, 0.3);
  }

  50% {
    box-shadow: 0 0 20px rgba(26, 115, 232, 0.6);
  }

  100% {
    box-shadow: 0 0 5px rgba(26, 115, 232, 0.3);
  }
}

.glow-effect {
  animation: glow 2s ease-in-out infinite;
}

/* 响应式设计 */
@media (max-width: 992px) {

  .tipsBox,
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 32px;
  }

  .features-grid,
  .tipsBox {
    grid-template-columns: 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* 扇形布局样式 */
.扇形-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 0;
}

.testimonials-content {
  position: absolute;
  width: 100%;
  /* top: -400px; */
  bottom: 264px;
  background: #FAFBFF;
  height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.testimonials-content-title {
  color: #262626;
  text-align: center;
  font-family: "PingFang SC";
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}

.testimonials-content-button-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
}

.testimonials-content-button {
  background: linear-gradient(90deg, #1F8AFF 0%, #1CAEFF 100%);
  border-radius: 12px;
  color: white;
  border: none;
  padding: 8px 18px;
  font-size: 16px;
}

.扇形-wrapper {
  position: relative;
  width: 1200px;
  height: 640px;
  min-width: 400px;
}

.square {
  position: absolute;
  width: 360px;
  height: 360px;
  min-width: 360px;
  background: #FFF;
  border-radius: 24px;
  /* justify-content: center; */
  /* align-items: center; */
  color: #fff;
  font-size: 32px;
  font-weight: bold;
  box-shadow: 0 2px 19px 0 #c5c5c540;
  padding: 16px 24px;
}

.square .userInfo {
  display: flex;
  justify-content: start;
  align-items: center;
  gap: 16px;
}

.square .userText {
  color: #262626;
  font-family: "PingFang SC";
  font-size: 16px;
  font-style: normal;
  font-weight: 400;
  line-height: 25px;
  margin-top: 12px;
}

.square .userInfo .userAvatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.square .userInfo .userName {
  color: #262626;
  text-align: center;
  font-family: "PingFang SC";
  font-size: 16px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}

/* 最下层：2个靠中间 */
.square-layer-1 {
  bottom: 200px;
}

.square-left-1 {
  left: 50%;
  transform: translateX(-330px) rotate(-18deg);
}

.square-right-1 {
  left: 50%;
  transform: translateX(-30px) rotate(18deg);
}

/* 中间层：2个靠两边 */
.square-layer-2 {
  bottom: 0px;
}

.square-left-2 {
  left: 50%;
  transform: translateX(-490px) rotate(-26deg);
}

.square-right-2 {
  left: 50%;
  transform: translateX(130px) rotate(26deg);
}

/* 最上层：1个正中间 */
.square-layer-3 {
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
}