body {
  margin: 0;
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;
  background-image: linear-gradient(120deg, #ff6f91 0%, #f7b1e4 40%, #b2deff 100%);
  min-height: 100vh;
  color: #333;
  overflow-x: hidden;
}

#app {
  width: 100vw;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

.lang-switch {
  position: fixed;
  top: 32px;
  right: 48px;
  z-index: 20;
  background: rgba(255,255,255,0.5);
  border-radius: 12px;
  box-shadow: 0 2px 12px #ff6f9133;
  padding: 4px 12px;
}
.lang-switch button {
  background: #fff6;
  border: none;
  border-radius: 6px;
  padding: 6px 18px;
  margin-left: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.lang-switch button.active {
  background: #ff6f91;
  color: #fff;
}

.main-header {
  text-align: center;
  margin-bottom: 40px;
  animation: fadeInDown 1s;
}
.title {
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 10px;
  letter-spacing: 2px;
}
.subtitle {
  font-size: 1.3rem;
  color: #555;
  margin-bottom: 30px;
}
.download-entry {
  display: flex;
  gap: 32px;
  margin-top: 32px;
}
.download-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #fff8;
  border-radius: 16px;
  padding: 18px 24px;
  box-shadow: 0 4px 16px #ff6f9133;
  transition: transform 0.2s, box-shadow 0.2s;
  margin: 0 8px;
}
.download-item:hover {
  transform: translateY(-6px) scale(1.08) rotate(-2deg);
  box-shadow: 0 8px 32px #ff6f9166;
}
.qr-placeholder {
  width: 90px;
  height: 90px;
  background: #eee;
  border-radius: 8px;
  margin-bottom: 10px;
  object-fit: contain;
  box-shadow: 0 2px 8px #0001;
}

.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px 16px;
  margin: 40px 0 32px 0;
}
.feature-card {
  background: #fff9;
  border-radius: 16px;
  box-shadow: 0 2px 12px #b2deff55;
  flex: 1 1 220px;
  min-width: 220px;
  max-width: 240px;
  padding: 24px 18px 18px 18px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  opacity: 0;
  transform: translateY(40px);
}
.feature-card img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 12px;
  border-radius: 10px;
  box-shadow: 0 2px 8px #0001;
}
.feature-card h2 {
  font-size: 1.2rem;
  margin: 10px 0 8px 0;
  color: #ff6f91;
}
.feature-card p {
  font-size: 1rem;
  color: #444;
}
.feature-card.aos-animate {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s, transform 0.7s;
}

/* Banner区块 */
.banner {
  width: 100vw;
  min-height: 420px;
  margin-bottom: 64px;
  background: linear-gradient(100deg, #ff6f91cc 0%, #f7b1e4cc 60%, #b2deffcc 100%);
  box-shadow: 0 8px 48px #ff6f9144;
  border-radius: 0 0 64px 64px;
  position: relative;
  overflow: visible;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 0 48px 0;
}
.banner::after {
  content: '';
  position: absolute;
  left: 10vw;
  top: 60px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, #fff7 0%, #ff6f9100 80%);
  filter: blur(30px);
  z-index: 1;
  pointer-events: none;
}
.banner-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100vw;
  max-width: 1600px;
  gap: 64px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
  padding: 0 8vw;
}
.banner-text {
  flex: 1 1 400px;
  min-width: 320px;
  background: rgba(255,255,255,0.45);
  border-radius: 24px;
  box-shadow: 0 4px 32px #b2deff55;
  padding: 48px 40px 40px 40px;
  backdrop-filter: blur(8px);
  animation: fadeInLeft 1.2s;
}
.banner-img {
  flex: 1 1 500px;
  min-width: 320px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.banner-img img {
  width: 420px;
  max-width: 40vw;
  border-radius: 32px;
  box-shadow: 0 8px 48px #b2deff77, 0 2px 24px #ff6f9144;
  transform: rotate(-6deg) scale(1.04);
  transition: transform 0.5s cubic-bezier(.4,2,.6,1), box-shadow 0.4s;
  animation: floatY 3.5s ease-in-out infinite alternate;
}
.banner-img img:hover {
  transform: rotate(2deg) scale(1.09);
  box-shadow: 0 16px 64px #ff6f91aa, 0 4px 32px #b2deff99;
}

/* 展开式功能区块 */
.features-expanded {
  display: flex;
  flex-direction: column;
  gap: 80px;
  margin-bottom: 60px;
  width: 100vw;
  padding: 0 0 0 0;
}
.feature-row {
  display: flex;
  align-items: center;
  gap: 0;
  min-height: 815px;
  position: relative;
  width: 100vw;
  justify-content: flex-start;
  overflow: visible;
}
.feature-row.reverse {
  flex-direction: row-reverse;
}
.feature-img {
  flex: 1 1 600px;
  min-width: 320px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
}
.feature-img img {
  width: 340px;
  max-width: 32vw;
  border-radius: 24px;
  box-shadow: 0 8px 48px #b2deff77, 0 2px 24px #ff6f9144;
  margin: 0 0 0 0;
  transform: rotate(-8deg) scale(1.04);
  transition: transform 0.5s cubic-bezier(.4,2,.6,1), box-shadow 0.4s;
  animation: floatY 3.5s ease-in-out infinite alternate;
}
.feature-row.reverse .feature-img img {
  transform: rotate(8deg) scale(1.04);
}
.feature-img img:hover {
  transform: scale(1.12) rotate(0deg);
  box-shadow: 0 16px 64px #ff6f91aa, 0 4px 32px #b2deff99;
  z-index: 3;
}
/* 漂浮图片叠加样式 */
.feature-img::after {
  content: '';
  position: absolute;
  top: 40px;
  left: 60px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, #fff7 0%, #b2deff00 80%);
  filter: blur(24px);
  z-index: 1;
  pointer-events: none;
}

.feature-info {
  flex: 2 1 600px;
  min-width: 320px;
  padding: 48px 64px;
  background: rgba(255,255,255,0.55);
  border-radius: 32px;
  box-shadow: 0 4px 32px #b2deff55;
  margin: 0 0 0 -60px;
  position: relative;
  z-index: 2;
  backdrop-filter: blur(8px);
  animation: fadeInRight 1.2s;
}
.feature-row.reverse .feature-info {
  margin: 0 -60px 0 0;
  animation: fadeInLeft 1.2s;
}
.feature-info h2 {
  font-size: 2rem;
  color: #ff6f91;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.feature-info p {
  font-size: 1.18rem;
  color: #444;
  line-height: 1.8;
}

/* 新增：功能区块设计感增强 */
.feature-label {
  display: inline-flex;
  align-items: center;
  font-size: 1.05rem;
  color: #fff;
  background: linear-gradient(90deg, #ff6f91 0%, #8ce9ff 100%);
  padding: 4px 16px 4px 10px;
  border-radius: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  box-shadow: 0 2px 8px #ff6f9133;
  letter-spacing: 1px;
  position: relative;
  z-index: 3;
  gap: 8px;
  animation: fadeInDown 1.2s;
}
.feature-label i {
  margin-right: 6px;
  font-size: 1.1em;
}
.feature-subtitle {
  font-size: 1.18rem;
  color: #5ffbf1;
  margin: 0 0 10px 0;
  font-weight: 500;
  letter-spacing: 1px;
  text-shadow: 0 2px 8px #b2deff55;
  animation: fadeInLeft 1.2s;
}
.feature-divider {
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, #ff6f91 0%, #f7b1e4 50%, #8ce9ff 100%);
  margin: 12px 0 18px 0;
  box-shadow: 0 2px 8px #ff6f9133;
  animation: fadeInRight 1.2s;
}

/* 漂浮叠加图片 */
.feature-float-img {
  position: absolute;
  bottom: -32px;
  right: -48px;
  z-index: 4;
  pointer-events: none;
  animation: floatY2 4.2s ease-in-out infinite alternate;
}
.feature-row.reverse .feature-float-img {
  left: -48px;
  right: auto;
  bottom: -32px;
  animation: floatY2 4.2s ease-in-out infinite alternate-reverse;
}
.feature-float-img img {
  width: 110px;
  height: 110px;
  border-radius: 18px;
  box-shadow: 0 4px 24px #b2deff77;
  opacity: 0.85;
  transform: rotate(-8deg) scale(1.08);
  transition: transform 0.4s;
}
.feature-float-img img:hover {
  transform: scale(1.18) rotate(0deg);
  opacity: 1;
}

/* 适配feature-img为relative，避免溢出 */
.feature-img {
  position: relative;
  z-index: 2;
}

/* 页脚 */
.footer {
  margin-top: 60px;
  padding: 32px 0 18px 0;
  text-align: center;
  background: rgba(255,255,255,0.5);
  border-radius: 32px 32px 0 0;
  box-shadow: 0 -2px 24px #b2deff55;
  width: 100vw;
}
.footer-links {
  margin-bottom: 10px;
}
.footer-links a {
  color: #ff6f91;
  font-size: 2rem;
  margin: 0 18px;
  transition: color 0.2s, transform 0.2s;
}
.footer-links a:hover {
  color: #68f3ff;
  transform: scale(1.2) rotate(-8deg);
}
.copyright {
  border-top: #999 1px dashed ;
  padding-top: 15px;
  color: #888;
  font-size: 1.05rem;
}

@media (max-width: 1200px) {
  .banner-content, .features-expanded, .feature-row, .feature-row.reverse {
    padding-left: 0 !important;
    padding-right: 0 !important;
    gap: 0 !important;
  }
  .banner-img img, .feature-img img {
    width: 60vw;
    min-width: 0;
    max-width: 100%;
  }
  .feature-info {
    padding: 32px 12vw;
    margin: 0;
  }
}
@media (max-width: 900px) {
  .banner-content, .feature-row, .feature-row.reverse {
    flex-direction: column !important;
    gap: 18px;
    align-items: flex-start;
    padding: 0 2vw;
  }
  .banner-img img, .feature-img img {
    width: 90vw;
    min-width: 0;
    max-width: 100%;
  }
  .feature-info {
    padding: 24px 4vw;
    margin: 0;
  }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(60px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes floatY {
  0% { transform: translateY(0) scale(1.04) rotate(-6deg); }
  100% { transform: translateY(-18px) scale(1.08) rotate(-2deg); }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatY2 {
  0% { transform: translateY(0) scale(1.08) rotate(-8deg); }
  100% { transform: translateY(-24px) scale(1.13) rotate(-2deg); }
} 

.feature-img .img-left {
  position: absolute;
  z-index: 3;
}

.feature-img .img-right {
  position: absolute;
  z-index: 2;
  margin-left: 25%;
  margin-top: 10%;
}

.contact-us {
  padding:25px 0 20px 20%;
  text-align: left;
  color:#555;
}