.about-page {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-left: 15%;
  overflow: hidden;
}

.card-container {
  perspective: 1500px;
  z-index: 10;
}

.card {
  width: 600px;
  height: 350px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

.card.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 25px;
  background: white;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 40px;
  box-sizing: border-box;
}

.card-back {
  transform: rotateY(180deg);
}

.card-wave-bg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 180px;
  overflow: hidden;
  pointer-events: none;
}

.wave-svg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 100%;
}

.wave-1 {
  animation: wave1 8s linear infinite;
  opacity: 0.3;
}

.wave-2 {
  animation: wave2 12s linear infinite;
  opacity: 0.2;
  bottom: 10px;
}

.wave-3 {
  animation: wave3 16s linear infinite;
  opacity: 0.15;
  bottom: 20px;
}

@keyframes wave1 {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes wave2 {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

@keyframes wave3 {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.card-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.horizontal-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 200, 255, 0.5), transparent);
}

.horizontal-line-1 {
  top: 20%;
}

.horizontal-line-2 {
  top: 35%;
}

.horizontal-line-3 {
  top: 50%;
}

.horizontal-line-4 {
  top: 65%;
}

.horizontal-line-5 {
  top: 80%;
}

.vertical-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(200, 200, 255, 0.5), transparent);
}

.vertical-line-1 {
  left: 10%;
}

.vertical-line-2 {
  left: 20%;
}

.card-front-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.personal-section {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.personal-name {
  font-family: 'Source Han Serif CN', 'SimSun', serif;
  font-size: 2.8rem;
  font-weight: 400;
  color: #1a1a1a;
  letter-spacing: 3px;
}

.personal-name-en {
  font-family: 'Segoe UI', sans-serif;
  font-size: 1rem;
  font-weight: 300;
  color: #666;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.personal-divider {
  width: 40px;
  height: 2px;
  background: #e0e0e0;
  margin: 20px 0;
}

.personal-meta {
  display: flex;
  gap: 30px;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-family: 'Segoe UI', sans-serif;
  font-size: 0.65rem;
  font-weight: 500;
  color: #aaa;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.meta-value {
  font-family: 'Source Han Serif CN', 'SimSun', serif;
  font-size: 0.95rem;
  color: #333;
}

.social-icons {
  display: flex;
  gap: 20px;
  z-index: 1;
  position: relative;
}

.social-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #555;
  transition: transform 0.3s ease, color 0.3s ease;
}

.social-icon:hover {
  transform: translateY(-3px);
  color: #1a1a1a;
}

.card-back-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.site-section {
  margin-top: 20px;
}

.site-title {
  font-family: 'Source Han Serif CN', 'SimSun', serif;
  font-size: 1.4rem;
  font-weight: 400;
  color: #1a1a1a;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.site-description {
  font-family: 'Source Han Serif CN', 'SimSun', serif;
  font-size: 0.95rem;
  color: #555;
  line-height: 1.9;
  margin-bottom: 30px;
}

.site-quote {
  font-family: 'Source Han Serif CN', 'SimSun', serif;
  font-size: 1rem;
  color: #888;
  font-style: italic;
  line-height: 1.8;
  border-left: 2px solid #e0e0e0;
  padding-left: 20px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.site-brand {
  font-family: 'Segoe UI', sans-serif;
  font-size: 0.9rem;
  font-weight: 300;
  color: #333;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.site-year {
  font-family: 'Segoe UI', sans-serif;
  font-size: 0.85rem;
  color: #aaa;
  letter-spacing: 1px;
}

.logo-container {
  position: absolute;
  bottom: 30px;
  right: 40px;
  z-index: 100;
}

.logo-container img {
  height: 60px;
  width: auto;
}

@media (max-width: 768px) {
  .about-page {
    padding-left: 2%;
    padding-right: 2%;
    justify-content: center;
  }

  .card {
    width: 90%;
    max-width: 450px;
    height: 300px;
  }

  .card-face {
    padding: 25px;
  }

  .personal-name {
    font-size: 2rem;
  }

  .personal-name-en {
    font-size: 0.85rem;
  }

  .social-icon {
    width: 35px;
    height: 35px;
    font-size: 1.3rem;
  }

  .site-title {
    font-size: 1.2rem;
  }

  .site-description {
    font-size: 0.85rem;
  }
}