/* ========== 全局基础样式 ========== */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Microsoft YaHei', sans-serif;
	scroll-behavior: smooth;
}
body {
	background-color: #0a0a12;
	color: #ffffff;
	line-height: 1.6;
	overflow-x: hidden;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
}
.section {
	padding: 80px 0;
	position: relative;
	z-index: 1;
}
.title {
	font-size: 36px;
	text-align: center;
	margin-bottom: 50px;
	background: linear-gradient(90deg, #4fc3f7, #7e57c2);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
}
.subtitle {
	font-size: 18px;
	color: #b0b0b0;
	text-align: center;
	margin-bottom: 30px;
}
@keyframes fadeUp {
	from { opacity: 0; transform: translateY(30px); }
	to { opacity: 1; transform: translateY(0); }
}
.fade-up {
	animation: fadeUp 0.8s ease forwards;
	opacity: 0;
}

/* 背景图+遮罩+滚动消失效果 */
.bg-section {
	position: relative;
	overflow: hidden;
}
.bg-section::before {
	content: '';
	/*position: fixed;*/
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: url('https://picsum.photos/id/120/1920/1080') center/cover no-repeat;
	opacity: 0.15;
	z-index: -1;
	transition: opacity 0.8s ease;
}
.bg-section.hide-bg::before {
	opacity: 0;
}

/* ========== Header 独立CSS ========== */
.logo {
  display: flex;
  align-items: center; 
  height: 40px; 
  gap: 10px;
}

.logo img {
  height: 100%; 
  width: auto; 
  object-fit: contain; 
  display: block; 
}
.logo a {
  height: 100%; 
  width: auto; 
  object-fit: contain; 
  display: block; 

}
.header-wrap a{
    text-decoration: none;	
}
.logo span {
  font-size: 24px; 
  font-weight: bold;
  line-height: 40px; 
  color: #fff; 
  background: linear-gradient(90deg, #4facfe, #a855f7); 
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-title {
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px; 
}
.hyai-header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	background: rgba(10, 10, 18, 0.95);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid rgba(79, 195, 247, 0.2);
	z-index: 999;
	transition: all 0.3s ease;
}
.header-wrap {
	display: flex;
	justify-content: space-between;
	align-items: center;
	height: 70px;
}
.logo {
	font-size: 24px;
	font-weight: bold;
	background: linear-gradient(90deg, #4fc3f7, #7e57c2);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
}
.nav {
	display: flex;
	gap: 25px;
}
.nav a {
	color: #ffffff;
	text-decoration: none;
	font-size: 15px;
	transition: color 0.3s ease;
	white-space: nowrap;
}
.nav a:hover {
	color: #4fc3f7;
}
.nav a.active,
.mobile-nav a.active {
	background: linear-gradient(90deg, #4fc3f7, #7e57c2);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent !important;
	font-weight: bold;
}
.download-btn {
padding: 6px 12px;
    font-size: 14px;
	background: linear-gradient(90deg, #4fc3f7, #7e57c2);
	border: none;
	border-radius: 30px;
	color: #fff !important;
	cursor: pointer;
	transition: transform 0.3s ease;
	text-decoration: none !important;
	color: inherit; 
}
.download-btn:hover {
	transform: scale(1.05);
}
.mobile-menu {
	display: none;
	font-size: 24px;
	cursor: pointer;
}
.mobile-nav {
	position: fixed;
	top: 70px;
	left: 0;
	width: 100%;
	background: #0f0f1a;
	padding: 20px;
	flex-direction: column;
	gap: 15px;
	display: none;
	z-index: 998;
	border-bottom: 1px solid rgba(79, 195, 247, 0.2);
}
.mobile-nav a {
	color: #fff;
	text-decoration: none;
	padding: 10px 0;
	border-bottom: 1px solid rgba(255,255,255,0.1);
}
.mobile-nav.show {
	display: flex;
}

/* ========== Banner ========== */
.banner {
	margin-top: 70px;
	height: 560px;
	display: flex;
	align-items: center;
	background: radial-gradient(circle at center, rgba(79, 195, 247, 0.1) 0%, #0a0a12 70%);
}
.banner-wrap {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 40px;
	width: 1200px;
}
.banner-text {
	flex: 1;
	min-width: 300px;
}
.banner-text h1 {
	font-size: 48px;
	margin-bottom: 20px;
	line-height: 1.2;
}
.banner-text p {
	font-size: 18px;
	color: #b0b0b0;
	margin-bottom: 30px;
}
.banner-img {
	flex: 1;
	min-width: 300px;
	text-align: center;
}
.banner-img img {
	max-width: 280px;
	max-height: 500px;
	border-radius: 20px;
	box-shadow: 0 0 30px rgba(79, 195, 247, 0.3);
}

/* 数据统计模块（带单位） */
.data-stats {
    display: flex;
    justify-content: flex-start;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}
.stat-item {
	text-align: center;
}
.stat-item .num {
	font-size: 32px;
	font-weight: bold;
	color: #4fc3f7;
	margin-bottom: 5px;
}
.stat-item .label {
	font-size: 14px;
	color: #b0b0b0;
}
.read-more{
	text-align: center;
    margin-top: 40px;
}

.read-more-btn {
  position: relative;
  overflow: hidden;
  background: linear-gradient(90deg, #4facfe 0%, #9d50bb 100%);
  border: none;
  border-radius: 12px;
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.read-more-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  transition: left 0.5s ease;
}

.read-more-btn a {
  text-decoration: none !important;
  color: inherit;
  position: relative;
  z-index: 1;
}

.read-more-btn:hover::before {
  left: 100%;
}

.read-more-btn:hover {
  transform: scale(1.01);
  box-shadow: 0 8px 25px rgba(79, 172, 254, 0.5);
}

/* ========== 什么是幻语AI ========== */
.about-intro {
	background: #0f0f1a;
	text-align: left;
	padding: 60px 0;
}
.about-intro .content {
	max-width: 1200px;
	margin: 0 auto;
}
.about-intro h2 {
	font-size: 32px;
	margin-bottom: 20px;
	background: linear-gradient(90deg, #4fc3f7, #7e57c2);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	text-align: center;
}
.about-intro p a{
	color: #409eff;
	text-decoration: none !important; 
}
.about-intro p {
	font-size: 17px;
	color: #e0e0e0;
	line-height: 1.9;
}

/* ========== 产品介绍 ========== */
.product {
	background: #0f0f1a;
}
.product-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 30px;
}
.product-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(79, 195, 247, 0.2);
    transition: all 0.3s ease;
    
}
.product-card:hover {
	transform: translateY(-8px);
	border-color: #4fc3f7;
}
.product-card i {
	font-size: 36px;
	color: #4fc3f7;
	margin-bottom: 15px;
}
.product-card h3 {
	font-size: 20px;
	margin-bottom: 10px;
}
.product-card p {
	color: #b0b0b0;
	font-size: 14px;
}

/* ========== 技术亮点 ========== */
.tech-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    margin-top: 40px;
    margin-bottom: 40px;
}
.tech-item {
    padding: 20px 16px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(79, 195, 247, 0.2);
    transition: all 0.3s ease;
}
.tech-item:hover {
    transform: translateY(-4px);
    border-color: rgba(79, 195, 247, 0.5);
    box-shadow: 0 8px 20px rgba(79, 195, 247, 0.15);
}
.tech-item i {
    font-size: 32px;
    color: #4fc3f7;
    margin-bottom: 12px;
}
.tech-item h4 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 8px;
}
.tech-item p {
	color: #b0b0b0;
    font-size: 12px;
    line-height: 1.5;
}
/* ==================================
   响应式断点：适配不同屏幕尺寸
   ================================== */

/* 平板端（768px以下）：保持2列布局 */
@media (max-width: 768px) {
  .tech-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 30px auto 50px;
  }

  .tech-item {
    padding: 20px 12px;
    border-radius: 12px;
  }

  .tech-item i {
    font-size: 32px;
    margin-bottom: 12px;
  }

  .tech-item h4 {
    font-size: 18px;
  }

  .tech-item p {
    font-size: 13px;
  }
}

/* 手机端（480px以下）：保持2列，进一步适配 */
@media (max-width: 480px) {
  .tech-list {
	grid-template-columns: repeat(2, 1fr);
	gap: 14px;
	padding: 0 12px;
  }

  .tech-item {
    padding: 16px 10px;
    border-radius: 10px;
  }

  .tech-item i {
    font-size: 28px;
    margin-bottom: 10px;
  }

  .tech-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
  }

  .tech-item p {
    font-size: 12px;
    line-height: 1.5;
  }
}

/* 超大屏（1440px以上）：3列等宽，最大宽度限制 */
@media (min-width: 1440px) {
  .tech-list {
    grid-template-columns: repeat(3, 1fr);
    max-width: 1400px;
  }
}
/* ========== APP展示（图文特效版） ========== */
.app {
	background: #0f0f1a;
}
.app-showcase {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 50px;
	margin-top: 40px;
}
.app-item {
	display: flex;
	align-items: center;
	gap: 30px;
	max-width: 800px;
	margin: 0 auto 40px;
	flex-wrap: wrap;
}
.app-item.reverse {
	flex-direction: row-reverse;
}
.app-img-box {
	width: 220px;
	height: 450px;
	border-radius: 25px;
	overflow: hidden;
	border: 2px solid rgba(79, 195, 247, 0.3);
	transition: transform 0.4s ease;
	box-shadow: 0 0 25px rgba(79, 195, 247, 0.2);
}
.app-img-box:hover {
	transform: scale(1.03) rotate(1deg);
}
.app-img-box img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}
.app-text {
	flex: 1;
	min-width: 280px;
}
.app-text h3 {
	font-size: 24px;
	margin-bottom: 15px;
	color: #4fc3f7;
}
.app-text p {
	color: #e0e0e0;
	font-size: 16px;
	line-height: 1.8;
}

/* ========== 激励计划 ========== */
.incentive {
	background: linear-gradient(135deg, #0a0a12, #121222);
	text-align: center;
}
.incentive-box {
    max-width: 720px;
    margin: 0 auto;
    border-radius: 34px;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    box-shadow: 0 0 30px rgb(56 116 255 / 40%), 0 0 60px rgba(102, 26, 233, 0.3) !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 30px;
}
.incentive-box h3 {
	font-size: 28px;
	margin-bottom: 20px;
	color: #7e57c2;
}
.incentive-box p {
	font-size: 16px;
	color: #d0d0d0;
	margin-bottom: 15px;
}
.incentive-box ul {
	list-style: none;
	margin: 20px 0;
}
.incentive-box li {
	padding: 8px 0;
	font-size: 15px;
    float: left;
}
.incentive-box li i {
	color: #4fc3f7;
	margin-right: 8px;
}

/* ========== 用户评价 ========== */
.reviews {
	background: #0a0a12;
	overflow: hidden;
}
.review-slider {
	width: 100%;
	overflow: hidden;
}
.review-track {
	display: flex;
	gap: 20px;
	width: max-content;
	animation: slide 18s linear infinite;
	padding: 20px;
}
.review-card {
    width: 340px;
    padding: 25px;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
   box-shadow: 0 0 30px rgb(56 116 255 / 40%), 0 0 60px rgba(102, 26, 233, 0.3) !important;
}
.review-card .stars {
	color: #ffd700;
	margin-bottom: 15px;
}
@keyframes slide {
	0% { transform: translateX(0); }
	100% { transform: translateX(calc(-340px * 3 - 60px)); }
}

/* ========== 常见问题 ========== */
.faq {
	background: #0f0f1a;
}
.faq-list {
	max-width: 800px;
	margin: 0 auto;
}
.faq-item {
	margin-bottom: 15px;
	border-bottom: 1px solid rgba(79, 195, 247, 0.2);
	padding-bottom: 15px;
}
.faq-question {
	display: flex;
	justify-content: space-between;
	align-items: center;
	cursor: pointer;
	font-size: 18px;
	padding: 10px 0;
}
.faq-question i {
	color: #4fc3f7;
	transition: transform 0.3s ease;
}
.faq-answer {
	max-height: 0;
	overflow: hidden;
	transition: max-height 0.4s ease;
	color: #b0b0b0;
}
.faq-item.active .faq-answer {
	max-height: 200px;
	padding-top: 10px;
}
.faq-item.active .faq-question i {
	transform: rotate(45deg);
}

/* ========== 新闻资讯 ========== */
.news {
	background: #0a0a12;
}
.news-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 25px;
}
.news-card {
	background: rgba(255,255,255,0.05);
	border-radius: 15px;
	overflow: hidden;
	transition: transform 0.3s ease;
}
.news-card:hover {
	transform: translateY(-5px);
}
.news-content {
	padding: 20px;
}

/* ========== 关于幻语AI ========== */
.about {
	background: #0f0f1a;
	text-align: center;
}
.about-text {
	max-width: 800px;
	margin: 0 auto;
	color: #c0c0c0;
	font-size: 16px;
	line-height: 1.9;
}

/* ====================== 幻语AI Footer 卡片式现代版 ====================== */
.hyai-footer {
	background-color: rgb(15 23 48);
	color: #fff;
	position: relative;
	overflow: hidden;
	margin-top: 40px; /* 给卡片留出悬浮空间 */
	background-image: url(/skin/images/footerbg.jpg);
	background-blend-mode: overlay;
}

/* 顶部悬浮卡片 */
.footer-top-card {
  background: linear-gradient(135deg, #0099ff 0%, #9966ff 100%);
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 50px;
  box-shadow: 0 10px 30px rgba(0, 153, 255, 0.25);
  position: relative;
  overflow: hidden;
}

.footer-top-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: rgba(255,255,255,0.08);
  transform: skewX(-15deg);
}

.card-content {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.card-content h3 {
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  color: #fff;
}

.card-content p {
  font-size: 16px;
  color: rgba(255,255,255,0.9);
  margin: 8px 0 0;
}

.card-btn {
  background: #fff;
  color: #0099ff;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.card-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

.hyai-footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.footer-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 35px;
  padding-top: 40px;
}

.footer-col h3, .footer-col h4 {
  font-weight: 700;
  margin-bottom: 20px;
  color: #6888da;
  position: relative;
  padding-bottom: 10px;
  letter-spacing: 0.5px;
}

.footer-col h3 {
  font-size: 24px;
}

.footer-col h4 {
  font-size: 18px;
}

.footer-col h3::after, .footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
}

.footer-col p {
  font-size: 15px;
  line-height: 1.7;
  color: #b0b0b0;
  margin: 0 0 20px;
  max-width: 380px;
}

/* 社交图标 */
.social-links {
  display: flex;
  gap: 15px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(102, 217, 255, 0.1);
  color: #6888da;
  font-size: 18px;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: #66d9ff;
  color: #121212;
  transform: translateY(-3px);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 14px;
}

.footer-col ul li a {
  color: #d0d0d0;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  padding-left: 0;
}

.footer-col ul li a:hover {
  color: #66d9ff;
  padding-left: 8px;
  text-shadow: 0 0 6px rgba(102, 217, 255, 0.3);
}

.copyright {
  text-align: center;
  padding-top: 25px;
  border-top: 1px solid #4f4f4f;
  color: #666666;
  font-size: 14px;
  letter-spacing: 0.3px;
}

.float-chat {
  position: fixed;
  right: 25px;
  bottom: 30px;
  z-index: 999;
}

.chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0099ff, #9966ff);
  color: #fff;
  font-size: 22px;
  text-decoration: none;
  box-shadow: 0 6px 16px rgba(0, 153, 255, 0.35);
  transition: all 0.3s ease;
  border: 1px solid rgba(255,255,255,0.1);
}

.chat-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 153, 255, 0.45);
}
/* ====================== 页脚sitemap样式 ====================== */
.hyai-footer .sitemap-body {
    display: inline-block;
    margin-left: 20px; 
    vertical-align: middle;
    width: 100%;
    text-align: center;
    margin: 10px;
}

.hyai-footer .sitemap-body a {
  color: #fff; 
  font-size: 14px; 
  text-decoration: none; 
  transition: color 0.3s ease; 
}

.hyai-footer .sitemap-body a:hover {
  color: #7b61ff;
  text-decoration: underline;
}

/* ====================== 备案号样式优化 ====================== */
.hyai-footer .copyright a {
  text-decoration: none !important;
  color: #999 !important; 
  transition: color 0.3s ease;
}

.hyai-footer .copyright a:hover {
  color: #ccc !important;
}

/* ====================== 版权文字基础样式（统一风格） ====================== */
.hyai-footer .copyright {
  font-size: 14px;
  color: #999;
}

/* ====================== 移动端响应式适配 ====================== */
@media (max-width: 768px) {
  .hyai-footer .copyright,
  .hyai-footer .sitemap-body {
    display: block;
    text-align: center;
    margin-left: 0;
  }
  .hyai-footer .sitemap-body {
    margin-top: 8px; 
  }
}
/* ====================== 响应式适配 ====================== */
@media screen and (max-width: 992px) {
  .footer-wrap {
    grid-template-columns: 1fr 1fr;
  }
  .brand-col {
    grid-column: 1 / -1;
  }
  .card-content {
    flex-direction: column;
    text-align: center;
  }
}

@media screen and (max-width: 768px) {
  .hyai-footer {
    padding: 40px 0 20px;
  }
  .footer-top-card {
    padding: 30px 20px;
  }
  .card-content h3 {
    font-size: 22px;
  }
  .footer-wrap {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .chat-btn {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
}

@media screen and (max-width: 480px) {
  .footer-top-card {
    padding: 25px 15px;
  }
  .card-content h3 {
    font-size: 20px;
  }
  .card-content p {
    font-size: 14px;
  }
  .footer-col h3 {
    font-size: 20px;
  }
  .footer-col h4 {
    font-size: 17px;
  }
  .chat-btn {
    width: 45px;
    height: 45px;
    font-size: 18px;
    right: 15px;
    bottom: 20px;
  }
}
/* ========== 响应式 ========== */
@media (max-width: 992px) {
	.nav {
		display: none;
	}
	.mobile-menu {
		display: block;
		color: #fff !important;
	}
}
@media (max-width: 768px) {
	.title {
		font-size: 28px;
	}
	.banner {
		height: auto;
		padding: 40px 20px;
	}
	.banner-text p {
		font-size: 16px;
	}
	.banner-text h1 {
		font-size: 32px;
	}
	.app-item {
		justify-content: center;
		text-align: center;
	}
	.data-stats {
		gap: 20px;
	}
	.stat-item .num {
		font-size: 24px;
	}
	.tech-item {
		width: 100%;
		text-align: center;
		padding: 0;
	}
	.header-wrap{
		margin: 0 20px;	
	}
	.banner-img{
		display:none;
	}
	.section {
        margin: 0 20px;
    }
}
@media (max-width: 768px) {
	.header-wrap {
	position: relative;
	}
	.hyai-header .download-btn {
	position: absolute;
	left: 54%;
	transform: translateX(-50%);
	padding: 8px 18px;
	font-size: 14px;
	}
	.mobile-menu {
	position: absolute;
	right: 0;
	}
	.phone-mockup {
		width: 80% !important;
		height: 80% !important;
	}
}
/* ====================== 星空背景容器 ====================== */
#app {
  position: relative;
  /* 保留你原有的深色底色，作为星空的底色 */
  background-color: #0a0a18;
  overflow: hidden;
  z-index: 1;
}

/* ====================== 多层星空层（核心） ====================== */
/* 第一层：大星星，慢动画 */
#app::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  /* 高度设为200%，完美适配高高度板块，滚动时无缝衔接 */
  height: 200%;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, #ffffff, transparent),
    radial-gradient(2px 2px at 60px 70px, #ffffff, transparent),
    radial-gradient(1px 1px at 50px 50px, #ffffff, transparent),
    radial-gradient(1px 1px at 130px 80px, #ffffff, transparent),
    radial-gradient(2px 2px at 90px 10px, #ffffff, transparent);
  background-size: 200px 200px;
  /* 缓慢向上滚动，营造星空流动感 */
  animation: star-move 50s linear infinite;
  opacity: 0.8;
  z-index: -1;
}

/* 第二层：中星星，中速动画 */
#app::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 200%;
  background-image: 
    radial-gradient(1.5px 1.5px at 100px 150px, #aaccff, transparent),
    radial-gradient(1.5px 1.5px at 200px 250px, #aaccff, transparent),
    radial-gradient(1px 1px at 150px 200px, #aaccff, transparent),
    radial-gradient(1px 1px at 300px 300px, #aaccff, transparent),
    radial-gradient(1.5px 1.5px at 250px 100px, #aaccff, transparent);
  background-size: 300px 300px;
  animation: star-move 30s linear infinite reverse;
  opacity: 0.6;
  z-index: -1;
}

/* 第三层：小星星，快速动画（增强层次感，可选） */
.app-stars-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 200%;
  background-image: 
    radial-gradient(1px 1px at 50px 50px, #ffffff, transparent),
    radial-gradient(1px 1px at 100px 100px, #ffffff, transparent),
    radial-gradient(0.5px 0.5px at 150px 150px, #ffffff, transparent),
    radial-gradient(0.5px 0.5px at 200px 200px, #ffffff, transparent);
  background-size: 100px 100px;
  animation: star-move 20s linear infinite;
  opacity: 0.4;
  z-index: -1;
}

/* ====================== 星空滚动动画 ====================== */
@keyframes star-move {
  from {
    transform: translateY(0);
  }
  to {
    /* 高度200%，滚动100%实现无缝循环 */
    transform: translateY(-50%);
  }
}

/* ====================== 半透明遮罩（可选，优化内容可读性） ====================== */
#app .container {
  position: relative;
  z-index: 2;
  /* 给内容区加轻微遮罩，让文字更清晰 */
  background-color: rgba(10, 10, 24, 0.3);
  padding: 80px 0;
}
/* 纯CSS三向下箭头 + 流光外框 + 悬浮动效 */
.triple-arrow-box {
  width: 100%;
  text-align: center;
  margin: 24px 0 32px 0;
}

.triple-arrow-link {
  position: relative;
  display: inline-block;
  width: 70px;
  height: 36px;
  text-decoration: none !important;
  animation: arrow-float 2.2s ease-in-out infinite;
}

/* 箭头主体 ↓ 向下 */
.arrow-wrapper {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  transform: rotate(90deg); /* 这里让箭头向下 */
  letter-spacing: 4px;
}

.arrow-item {
  background: linear-gradient(90deg, #4fd1ff, #9d50ff, #ff57b2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 外框流光旋转特效 */
.glow-border {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 12px;
  z-index: 1;
}

.glow-border::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 12px;
  padding: 2px;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: border-rotate 3s linear infinite;
}

/* 悬浮上下动效 */
@keyframes arrow-float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(6px); }
  100% { transform: translateY(0px); }
}

/* 边框炫彩流转 */
@keyframes border-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.rocket-go-top {
  position: fixed;
  bottom: 30px;
  right: 25px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(90deg, #4fc3f7, #7e57c2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999999;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  border: 2px solid #fff;
}
.rocket-go-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.rocket-go-top:hover {
  background: #1d4ed8;
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.5);
}
.rocket-icon {
  width: 22px;
  height: 22px;
  margin-bottom: 2px;
}
.rocket-text {
  font-size: 12px;
  color: white;
  font-weight: bold;
  line-height: 1;
}

/* 响应式手机端 */
@media (max-width: 768px) {
  .rocket-go-top {
    width: 52px;
    height: 52px;
    bottom: 22px;
    right: 20px;
  }
  .rocket-icon {
    width: 19px;
    height: 19px;
  }
  .rocket-text {
    font-size: 11px;
  }
}