:root{
  --bg:#020617;
  --main:#00f5ff;
  --gradient:linear-gradient(135deg,#00f5ff,#6366f1);
  --card-bg:rgba(255,255,255,0.05);
  --card-hover-bg:rgba(255,255,255,0.1);
}

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

body{
  margin:0;
  background:var(--bg);
  color:#fff;
  font-family:sans-serif;
  line-height:1.6;
  padding-top: 80px;
}

/* 悬浮条 */
.floating-bar{
  position:fixed;
  bottom:20px;
  left:50%;
  transform:translateX(-50%);
  background:rgba(0,0,0,.6);
  padding:10px 20px;
  border-radius:40px;
  backdrop-filter:blur(10px);
  z-index:999;
  display: flex;
  align-items: center;
  gap: 15px;
}

.floating-bar a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s;
}

.floating-bar a:hover {
  color: var(--main);
}

/* hero */
.hero{
  height:70vh;
  max-height: 600px;
  position:relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 20px;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:999;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-content {
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px 0;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}

.nav-link:hover {
  color: var(--main);
}

.nav-link.active {
  color: var(--main);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
}

.logo {
  font-size: 24px;
  font-weight: bold;
}

.btn {
  padding: 8px 16px;
  background: var(--gradient);
  border-radius: 20px;
  color: #000;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s;
}

.btn:hover {
  transform: scale(1.05);
}

.hero-content{
  z-index:2;
  max-width: 800px;
}

.hero-content h2 {
  font-size: 48px;
  margin-bottom: 16px;
}

.hero-content p {
  font-size: 20px;
  margin-bottom: 32px;
  opacity: 0.8;
}

.hero-description {
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin: 40px 0;
  flex-wrap: wrap;
}

.hero-feature {
  text-align: center;
  min-width: 100px;
}

.hero-feature-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.hero-feature p {
  margin: 0;
  font-size: 14px;
  opacity: 0.8;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 40px 0;
  flex-wrap: wrap;
}

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

.stat-number {
  display: block;
  font-size: 24px;
  font-weight: bold;
  color: var(--main);
}

.stat-label {
  display: block;
  font-size: 14px;
  opacity: 0.8;
  margin-top: 5px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.cta.primary {
  background: var(--gradient);
  color: #000;
}

.cta.secondary {
  background: transparent;
  color: var(--main);
  border: 2px solid var(--main);
}

.cta.secondary:hover {
  background: var(--main);
  color: #000;
}

.gradient-text{
  background:var(--gradient);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  display: inline-block;
}

.cta{
  display:inline-block;
  padding:14px 30px;
  background:var(--gradient);
  border-radius:40px;
  color:#000;
  text-decoration:none;
  font-weight: bold;
  transition: transform 0.3s;
}

.cta:hover {
  transform: scale(1.05);
}

/* 卡片 */
.features{
  padding: 80px 20px;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin: 40px 0;
}

/* 统一section样式 */
section {
  margin: 40px 0;
  padding: 60px 20px;
}

section .container {
  padding: 0;
}

/* 特殊处理header和footer */
header {
  margin: 0;
  padding: 0;
}

footer {
  margin: 60px 0 0;
  padding: 40px 20px;
}

.card{
  flex:1;
  padding:30px;
  background:var(--card-bg);
  border-radius:16px;
  transition:.3s;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
}

.card:hover{
  transform:translateY(-10px);
  background: var(--card-hover-bg);
}

/* 下载页 */
.download-header{
  position: relative;
  padding: 40px 20px;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.download-header .nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

.header-content {
  text-align:center;
  max-width: 800px;
  margin: 0 auto;
}

.header-content h1 {
  font-size: 40px;
  margin-bottom: 16px;
}

.header-content p {
  font-size: 18px;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* 应用信息 */
.app-info {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.app-info h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.app-info p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.features-list {
  display: flex;
  gap: 20px;
  margin-top: 40px;
}

.feature-item {
  flex: 1;
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.feature-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.feature-item h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.feature-item p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 下载选项 */
.download-options {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 28px;
  margin-bottom: 40px;
}

/* 卡片网格 */
.card-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.download-cards {
  display: flex;
  gap: 20px;
}

.download-card {
  flex: 1;
  padding: 30px;
  background: var(--card-bg);
  border-radius: 16px;
  text-align: center;
  transition: 0.3s;
}

.download-card:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.download-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.download-card p {
  opacity: 0.8;
  margin-bottom: 24px;
  font-size: 14px;
}

.download-btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--gradient);
  border-radius: 30px;
  color: #000;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s;
}

.download-btn:hover {
  transform: scale(1.05);
}

/* 下载详情 */
.download-details {
  margin: 20px 0;
}

.download-details p {
  margin: 8px 0;
  font-size: 14px;
  opacity: 0.8;
}

.download-tips {
  margin-top: 15px;
  padding: 15px;
  background: rgba(0, 245, 255, 0.1);
  border-radius: 8px;
  border-left: 3px solid var(--main);
}

.download-tips p {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
}

.download-notes {
  margin-top: 40px;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 16px;
}

.download-notes h3 {
  margin-bottom: 16px;
  font-size: 18px;
}

.download-notes ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.download-notes li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  opacity: 0.8;
}

.download-notes li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--main);
  font-size: 18px;
  font-weight: bold;
}

/* 常见问题 */
.faq {
  padding: 60px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.faq h2 {
  font-size: 32px;
  margin-bottom: 40px;
  text-align: center;
}

.faq-item {
  margin-bottom: 24px;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 12px;
}

.faq-item h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.faq-item p {
  opacity: 0.8;
  font-size: 14px;
}

/* 常见问题分类 */
.faq-category {
  margin-bottom: 40px;
}

.faq-category h3 {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-item h4 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #fff;
}

.faq-item {
  margin-bottom: 20px;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 12px;
  transition: 0.3s;
}

.faq-item:hover {
  transform: translateY(-5px);
  background: var(--card-hover-bg);
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 页脚 */
.footer {
  padding: 40px 20px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 60px;
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer p {
  margin-bottom: 16px;
  opacity: 0.6;
  font-size: 14px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.footer-links a {
  color: #fff;
  text-decoration: none;
  opacity: 0.6;
  font-size: 14px;
  transition: opacity 0.3s;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--main);
}

/* 关于我们 */
.about {
  padding: 80px 20px;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.about-content {
  max-width: 1200px;
  margin: 0 auto;
}

.about-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.about-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.about-features {
  display: flex;
  gap: 20px;
  margin-top: 40px;
}

.about-item {
  flex: 1;
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.about-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.about-item h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.about-item p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 产品介绍 */
.product-features {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.product-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.product-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.section-subtitle {
  font-size: 24px;
  margin: 40px 0 24px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.feature-card {
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.feature-card h4 {
  margin-bottom: 12px;
  font-size: 18px;
}

.feature-card p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

.tech-advantages {
  display: flex;
  gap: 20px;
  margin: 40px 0;
}

.tech-item {
  flex: 1;
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.tech-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.tech-item h4 {
  margin-bottom: 12px;
  font-size: 18px;
}

.tech-item p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 使用场景 */
.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.use-case-item {
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.use-case-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.use-case-item h4 {
  margin-bottom: 12px;
  font-size: 18px;
}

.use-case-item p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 界面预览 */
.screenshots {
  padding: 60px 20px;
  background: var(--bg);
  margin: 60px 0;
}

.screenshots-content {
  max-width: 1200px;
  margin: 0 auto;
}

.screenshots-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.screenshots-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.screenshot-grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.screenshot-item {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
  text-align: center;
}

.screenshot-placeholder {
  width: 100%;
  height: 200px;
  background: var(--card-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 16px;
  transition: 0.3s;
}

.screenshot-item:hover .screenshot-placeholder {
  transform: scale(1.05);
  background: var(--card-hover-bg);
}

.screenshot-item p {
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 用户评价 */
.testimonials {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.testimonials-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.testimonials-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.testimonial-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.testimonial-item {
  flex: 1;
  min-width: 300px;
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.testimonial-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.testimonial-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-bottom: 16px;
}

.testimonial-item h4 {
  margin-bottom: 12px;
  font-size: 18px;
}

.testimonial-item p {
  text-align: left;
  margin: 0 0 16px;
  opacity: 0.8;
  font-size: 14px;
}

.testimonial-rating {
  font-size: 16px;
  color: #ffd700;
  margin-top: 12px;
}

.testimonial-info {
  margin: 16px 0;
}

.testimonial-role {
  font-size: 12px;
  opacity: 0.6;
  margin-top: 4px;
}

.testimonial-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
}

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

.testimonial-stat .stat-number {
  display: block;
  font-size: 24px;
  font-weight: bold;
  color: var(--main);
}

.testimonial-stat .stat-label {
  display: block;
  font-size: 14px;
  opacity: 0.8;
  margin-top: 5px;
}

/* 价格方案 */
.pricing {
  padding: 60px 20px;
  background: var(--bg);
  margin: 60px 0;
}

.pricing-content {
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.pricing-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.pricing-grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.pricing-card {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
  padding: 30px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
  position: relative;
  text-align: center;
}

.pricing-card:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.pricing-card.popular {
  border: 2px solid var(--main);
  transform: scale(1.05);
}

.popular-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--gradient);
  color: #000;
  padding: 5px 15px;
  border-radius: 20px;
  font-weight: bold;
  font-size: 14px;
}

.pricing-card h3 {
  font-size: 24px;
  margin-bottom: 20px;
}

.price {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 20px;
}

.price span {
  font-size: 16px;
  font-weight: normal;
  opacity: 0.8;
}

.pricing-features {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
}

.pricing-features li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.8;
  font-size: 14px;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--gradient);
  border-radius: 30px;
  color: #000;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s;
}

.pricing-btn:hover {
  transform: scale(1.05);
}

.price-description {
  font-size: 14px;
  opacity: 0.8;
  margin: 10px 0 20px;
  text-align: center;
}

.pricing-promotion {
  margin: 15px 0;
  padding: 10px;
  background: rgba(255, 215, 0, 0.1);
  border-radius: 8px;
  text-align: center;
}

.pricing-promotion p {
  margin: 0;
  font-size: 14px;
  color: #ffd700;
  font-weight: bold;
}

/* 价格对比 */
.pricing-comparison {
  margin-top: 60px;
  padding: 30px;
  background: var(--card-bg);
  border-radius: 16px;
}

.pricing-comparison h3 {
  font-size: 20px;
  margin-bottom: 20px;
  text-align: center;
}

.comparison-table {
  width: 100%;
  overflow-x: auto;
}

.table-header {
  display: flex;
  background: var(--card-hover-bg);
  border-radius: 8px 8px 0 0;
  font-weight: bold;
}

.table-row {
  display: flex;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.table-row:last-child {
  border-bottom: none;
  border-radius: 0 0 8px 8px;
}

.table-cell {
  flex: 1;
  padding: 15px;
  text-align: center;
}

.table-cell:first-child {
  flex: 1.5;
  text-align: left;
  font-weight: bold;
}

/* 价格常见问题 */
.pricing-faq {
  margin-top: 40px;
}

.pricing-faq h3 {
  font-size: 20px;
  margin-bottom: 20px;
  text-align: center;
}

.pricing-faq .faq-item {
  margin-bottom: 15px;
  padding: 15px;
  background: var(--card-bg);
  border-radius: 8px;
}

.pricing-faq .faq-item h4 {
  font-size: 16px;
  margin-bottom: 10px;
}

.pricing-faq .faq-item p {
  font-size: 14px;
  opacity: 0.8;
  margin: 0;
}

/* 博客动态 */
.blog {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.blog-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.blog-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.blog-item {
  padding: 20px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.blog-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.blog-thumbnail {
  width: 100%;
  height: 150px;
  background: var(--card-hover-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-bottom: 16px;
}

.blog-item h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.blog-item p {
  text-align: left;
  margin: 0 0 16px;
  opacity: 0.8;
  font-size: 14px;
}

.blog-link {
  color: var(--main);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s;
}

.blog-link:hover {
  color: #fff;
}

.blog-date {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--gradient);
  color: #000;
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: bold;
}

.blog-meta {
  display: flex;
  gap: 15px;
  margin: 15px 0;
  font-size: 12px;
  opacity: 0.6;
}

.blog-category {
  background: rgba(0, 245, 255, 0.2);
  padding: 2px 8px;
  border-radius: 12px;
}

/* 博客分页 */
.blog-pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 40px;
}

.pagination-link {
  padding: 8px 16px;
  background: var(--card-bg);
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
  transition: 0.3s;
}

.pagination-link:hover {
  background: var(--card-hover-bg);
}

.pagination-link.active {
  background: var(--gradient);
  color: #000;
  font-weight: bold;
}

/* 联系我们 */
.contact {
  padding: 60px 20px;
  background: var(--bg);
  margin: 60px 0;
}

.contact-content {
  max-width: 1200px;
  margin: 0 auto;
}

.contact-content h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.contact-content p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.contact-info {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.contact-item {
  flex: 1;
  min-width: 300px;
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.contact-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.contact-item h3 {
  margin-bottom: 16px;
  font-size: 18px;
}

.contact-item p {
  text-align: left;
  margin: 8px 0;
  opacity: 0.8;
  font-size: 14px;
}

.contact-form {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card-bg);
  padding: 30px;
  border-radius: 16px;
}

.contact-form h3 {
  font-size: 20px;
  margin-bottom: 20px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--main);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-btn {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--gradient);
  border: none;
  border-radius: 30px;
  color: #000;
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.3s;
}

.form-btn:hover {
  transform: scale(1.05);
}

/* 用户群体 */
.user-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.user-group-item {
  padding: 20px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.user-group-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.user-group-item h4 {
  margin-bottom: 12px;
  font-size: 16px;
}

.user-group-item p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

/* 使用教程 */
.tutorial {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 60px auto;
}

.tutorial h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.tutorial p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.tutorial-steps {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin: 40px 0;
}

.tutorial-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.tutorial-step:hover {
  transform: translateY(-5px);
  background: var(--card-hover-bg);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  color: #000;
  flex-shrink: 0;
}

.tutorial-step h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.tutorial-step p {
  text-align: left;
  margin: 0;
  opacity: 0.8;
  font-size: 14px;
}

.tutorial-tips {
  margin-top: 40px;
  padding: 20px;
  background: rgba(0, 245, 255, 0.1);
  border-radius: 16px;
  border-left: 3px solid var(--main);
}

.tutorial-tips h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.tutorial-tips ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tutorial-tips li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  opacity: 0.8;
}

.tutorial-tips li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--main);
  font-size: 18px;
  font-weight: bold;
}

/* 系统要求 */
.system-requirements {
  padding: 60px 20px;
  background: var(--bg);
  margin: 60px 0;
}

.system-requirements h2 {
  font-size: 32px;
  margin-bottom: 24px;
  text-align: center;
}

.system-requirements p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  opacity: 0.8;
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.requirement-item {
  padding: 25px;
  background: var(--card-bg);
  border-radius: 16px;
  transition: 0.3s;
}

.requirement-item:hover {
  transform: translateY(-10px);
  background: var(--card-hover-bg);
}

.requirement-item h3 {
  font-size: 20px;
  margin-bottom: 20px;
}

.requirement-item ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.requirement-item li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  opacity: 0.8;
}

.requirement-item li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--main);
  font-size: 14px;
  font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
  }
  
  .hero-content h2 {
    font-size: 32px;
  }
  
  .hero-content p {
    font-size: 16px;
  }
  
  .hero-description {
    font-size: 14px;
  }
  
  .hero-features {
    gap: 20px;
  }
  
  .hero-feature {
    min-width: 80px;
  }
  
  .hero-feature-icon {
    font-size: 24px;
  }
  
  .hero-stats {
    gap: 20px;
  }
  
  .stat-number {
    font-size: 20px;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .cta {
    width: 100%;
    max-width: 200px;
    text-align: center;
  }
  
  .features {
    flex-direction: column;
  }
  
  .features-list {
    flex-direction: column;
  }
  
  .download-cards {
    flex-direction: column;
  }
  
  .floating-bar {
    flex-direction: column;
    gap: 10px;
    padding: 15px;
    text-align: center;
  }
  
  .download-header {
    padding: 60px 20px 30px;
  }
  
  .download-header h1 {
    font-size: 32px;
  }
  
  .app-info, .download-options, .faq {
    padding: 40px 20px;
  }
  
  .app-info h2, .faq h2 {
    font-size: 24px;
  }
  
  .section-title {
    font-size: 24px;
  }
  
  .about-features {
    flex-direction: column;
  }
  
  .about {
    padding: 40px 20px;
    margin: 40px 0;
  }
  
  .about-content h2 {
    font-size: 24px;
  }
  
  .tech-advantages {
    flex-direction: column;
  }
  
  .product-features,
  .testimonials,
  .blog {
    padding: 40px 20px;
  }
  
  .use-cases {
    grid-template-columns: 1fr;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .screenshots,
  .pricing,
  .contact {
    padding: 40px 20px;
    margin: 40px 0;
  }
  
  .product-content h2,
  .screenshots-content h2,
  .testimonials-content h2,
  .pricing-content h2,
  .blog-content h2,
  .contact-content h2 {
    font-size: 24px;
  }
  
  .testimonial-grid {
    flex-direction: column;
  }
  
  .testimonial-stats {
    gap: 20px;
  }
  
  .testimonial-stat .stat-number {
    font-size: 20px;
  }
  
  .section-subtitle {
    font-size: 20px;
  }
  
  .pricing-card {
    min-width: 280px;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-comparison {
    padding: 20px;
  }
  
  .table-cell {
    padding: 10px;
    font-size: 14px;
  }
  
  .table-cell:first-child {
    flex: 1;
  }
  
  .contact-info {
    flex-direction: column;
  }
  
  .form-group input {
    margin-bottom: 10px;
  }
  
  .user-groups {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-meta {
    flex-direction: column;
    gap: 5px;
  }
  
  .blog-pagination {
    flex-wrap: wrap;
  }
  
  .pagination-link {
    padding: 6px 12px;
    font-size: 14px;
  }
  
  .tutorial {
    padding: 40px 20px;
    margin: 40px auto;
  }
  
  .system-requirements {
    padding: 40px 20px;
    margin: 40px 0;
  }
  
  .tutorial h2,
  .system-requirements h2 {
    font-size: 24px;
  }
  
  .tutorial-step {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .step-number {
    align-self: center;
  }
  
  .requirements-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav {
    padding: 15px;
  }
  
  .logo {
    font-size: 20px;
  }
  
  .btn {
    padding: 6px 12px;
    font-size: 14px;
  }
  
  .hero-content h2 {
    font-size: 28px;
  }
  
  .cta {
    padding: 12px 24px;
    font-size: 14px;
  }
  
  .card, .feature-item, .download-card {
    padding: 20px;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
}