/* ========================================
   About CSS - SheetNext 关于页样式
   轻量优化：统一首页风格
======================================== */

.about {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72) 0%, rgba(238, 240, 242, 0.35) 42%, rgba(238, 240, 242, 0.82) 100%);
}

.about-hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 52px;
  margin-bottom: 36px;
  background:
    radial-gradient(circle at 20% 20%, rgba(35, 131, 226, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 25%, rgba(16, 185, 129, 0.1) 0%, transparent 45%),
    linear-gradient(135deg, #f4f8ff 0%, #eef4ff 48%, #f8fbff 100%);
  border-bottom: 1px solid rgba(35, 131, 226, 0.14);
}

.about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(55, 53, 47, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(55, 53, 47, 0.06) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 88% 74% at 50% 20%, black 38%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 88% 74% at 50% 20%, black 38%, transparent 76%);
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.about-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 4.8vw, 54px);
  font-weight: 700;
  letter-spacing: -0.024em;
  color: var(--color-text);
}

.about-hero p {
  margin: 0 auto;
  max-width: 760px;
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--color-text-light);
}

.about-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px
}

.about-card,
.qrcode-section {
  background: linear-gradient(160deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid rgba(35, 131, 226, 0.14);
  border-radius: 16px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.07);
  padding: 34px 32px;
  margin-bottom: 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.about-card:hover,
.qrcode-section:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.1);
}

.about-card h2,
.qrcode-section h2 {
  margin: 0 0 20px;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
  padding-left: 12px;
  border-left: 4px solid var(--color-primary);
}

.about-card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 14px;
  margin-top: 6px;
}

.contact-item {
  background: #ffffff;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid rgba(35, 131, 226, 0.14);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.contact-item h4 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.contact-item p {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.65;
}

.qrcode-section h2 {
  text-align: center;
  border-left: 0;
  padding-left: 0;
  position: relative;
}

.qrcode-section h2::after {
  content: "";
  display: block;
  width: 66px;
  height: 3px;
  margin: 10px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #2383e2 0%, #14b8a6 100%);
}

.qrcode-container {
  display: flex;
  justify-content: center;
  gap: 34px;
  flex-wrap: wrap;
}

.qrcode-item {
  text-align: center;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(35, 131, 226, 0.13);
  background: #ffffff;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.qrcode-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.09);
}

.qrcode-image {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  border: 1px solid rgba(35, 131, 226, 0.18);
  object-fit: cover;
}

.qrcode-item h4 {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.qrcode-item p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .about-hero {
    padding: 48px 0 38px;
    margin-bottom: 24px;
  }

  .about-hero p {
    font-size: 15px;
  }

  .about-section {
    padding: 0 16px 44px;
  }

  .about-card,
  .qrcode-section {
    padding: 22px 18px;
    border-radius: 12px;
  }

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

  .qrcode-container {
    gap: 16px;
  }

  .qrcode-image {
    width: 160px;
    height: 160px;
  }
}