/* TaulTech About Page Stylesheet */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --color-brand: #2563eb;
  --color-brand-hover: #1d4ed8;
  --color-brand-light: #eff6ff;
  --color-brand-subtle: #dbeafe;
  --color-purple: #7c3aed;
  --color-purple-light: #f5f3ff;
  --color-dark-bg: #0f172a;
  --color-text-main: #0f172a;
  --color-text-body: #334155;
  --color-text-muted: #64748b;
  --color-bg-page: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-border: #e2e8f0;
  --color-brand-border: #93c5fd;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body.about-page {
  font-family: var(--font-sans);
  background-color: var(--color-bg-page);
  color: var(--color-text-body);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
}

.about-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= Hero Section ================= */
.about-hero {
  background: linear-gradient(180deg, #f0f6ff 0%, #ffffff 100%);
  padding: 72px 0 56px;
  text-align: center;
}

.about-title {
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--color-text-main);
  max-width: 860px;
  margin: 0 auto 24px;
}

.about-lead {
  font-size: clamp(17px, 2.5vw, 19px);
  line-height: 1.75;
  color: #475569;
  max-width: 820px;
  margin: 0 auto;
}

.about-team-card {
  max-width: 820px;
  margin: 36px auto 0;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-brand);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  text-align: left;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.05);
}

.about-team-card p {
  font-size: 16px;
  line-height: 1.8;
  color: #334155;
}

/* ================= Core Advantages Section ================= */
.about-advantages {
  background-color: var(--color-bg-subtle);
  padding: 72px 0 84px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-section-heading {
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 750;
  line-height: 1.3;
  color: var(--color-text-main);
  text-align: center;
  margin-bottom: 44px;
}

.about-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.about-feature-card {
  background: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: 0 2px 5px #0f172a08;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}

.about-feature-card:hover {
  border-color: var(--color-brand-border);
  box-shadow: var(--shadow-md);
}

.about-feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 14px;
  line-height: 1.45;
}

.about-feature-card p {
  font-size: 15px;
  line-height: 1.75;
  color: #475569;
  flex: 1;
}

/* ================= CTA Section ================= */
.about-cta-section {
  padding: 72px 0 88px;
  background-color: var(--color-bg-page);
}

.about-cta-box {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 32px;
  background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.07);
}

.about-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-brand);
  color: #ffffff;
  font-size: 16px;
  font-weight: 650;
  padding: 14px 36px;
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
  transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.about-btn-primary:hover {
  background-color: var(--color-brand-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}

.about-btn-primary:active {
  transform: translateY(0);
}

/* ================= Footer ================= */
.about-footer {
  background-color: var(--color-dark-bg);
  color: #cbd5e1;
  padding: 42px 0 32px;
}

.about-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.about-footer strong {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
}

.about-footer p {
  font-size: 13px;
  margin-top: 8px;
  color: #94a3b8;
}

.about-footer-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
}

.about-footer-links a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.15s;
}

.about-footer-links a:hover {
  color: #ffffff;
}

.about-footer-bottom {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid #334155;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #94a3b8;
}

.about-footer-bottom a {
  color: #94a3b8;
  text-decoration: none;
}

.about-footer-bottom a:hover {
  color: #cbd5e1;
}

/* ================= Responsive ================= */
@media (max-width: 900px) {
  .about-cards-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .about-container {
    padding: 0 20px;
  }
  .about-hero {
    padding: 44px 0 36px;
  }
  .about-team-card {
    padding: 22px 20px;
    margin-top: 28px;
  }
  .about-advantages {
    padding: 48px 0 56px;
  }
  .about-section-heading {
    margin-bottom: 32px;
  }
  .about-feature-card {
    padding: 24px 20px;
  }
  .about-cta-section {
    padding: 48px 0 56px;
  }
  .about-cta-box {
    padding: 36px 20px;
  }
  .about-btn-primary {
    width: 100%;
    padding: 13px 24px;
    font-size: 15px;
  }
  .about-footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .about-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}