/* ====== 页面专属样式：page-about ====== */
.page-about {
  --page-hero-bg: linear-gradient(135deg, rgba(11,26,48,0.8) 0%, rgba(10,10,10,0.95) 100%);
  --page-accent-glow: 0 0 12px rgba(138, 43, 226, 0.4);
  contain: layout style;
}

/* 面包屑 */
.page-about .pg-breadcrumb {
  padding-top: 1rem;
  padding-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-secondary);
}
.page-about .pg-breadcrumb a {
  color: var(--color-text-accent);
  text-decoration: none;
}
.page-about .pg-breadcrumb a:hover {
  color: var(--color-highlight);
}
.page-about .pg-slash-divider {
  display: inline-block;
  width: 1.5em;
  text-align: center;
  color: var(--color-secondary);
}
.page-about .pg-slash-divider::before {
  content: "/";
}

/* ===== hero 首屏 ===== */
.page-about .hero {
  background: var(--page-hero-bg);
  padding: 3rem 0 2rem;
  position: relative;
  overflow: hidden;
}
.page-about .hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 50%;
  height: 150%;
  background: radial-gradient(circle at 30% 40%, rgba(0,255,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.page-about .hero__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}
@media (min-width: 768px) {
  .page-about .hero__inner {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .hero__text {
    flex: 0 0 55%;
  }
  .page-about .hero__visual {
    flex: 0 0 40%;
    margin-left: auto;
  }
}
.page-about .hero__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--color-text-accent);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.page-about .hero__summary {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text);
  max-width: 36em;
}
.page-about .hero__visual {
  position: relative;
  text-align: center;
}
.page-about .hero__img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  transition: transform 0.4s cubic-bezier(0.25,0.1,0.25,1), box-shadow 0.4s ease;
  box-shadow: 0 0 0 transparent;
}
.page-about .hero__img:hover {
  transform: rotate(3deg) scale(1.02);
  box-shadow: var(--page-accent-glow);
}
.page-about .hero__annotation {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  position: absolute;
  right: -1.5rem;
  top: 0.5rem;
  opacity: 0.6;
}
@media (min-width: 768px) {
  .page-about .hero__annotation {
    right: -2.5rem;
  }
}

/* ===== 品牌定位 ===== */
.page-about .section-brand {
  padding: 3rem 0;
}
.page-about .brand__content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: flex-start;
}
@media (min-width: 768px) {
  .page-about .brand__content {
    flex-direction: row;
    align-items: center;
  }
  .page-about .brand__text {
    flex: 0 0 55%;
  }
  .page-about .brand__visual {
    flex: 0 0 40%;
  }
}
.page-about .brand__text {
  font-size: 1rem;
  line-height: 1.7;
}
.page-about .brand__text p {
  margin-bottom: 1em;
}
.page-about .brand__text em {
  color: var(--color-text-accent);
  font-style: normal;
  background: linear-gradient(90deg, transparent, rgba(138,43,226,0.12) 10%, rgba(138,43,226,0.12) 90%, transparent);
  padding: 0 0.25em;
}
.page-about .brand__img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  transition: transform 0.4s ease;
}
.page-about .brand__img:hover {
  transform: rotate(1deg) scale(1.01);
}

/* ===== 服务承诺 ===== */
.page-about .section-promise {
  padding: 2rem 0 3rem;
  background: linear-gradient(180deg, transparent 0%, rgba(11,26,48,0.3) 50%, transparent 100%);
}
.page-about .promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}
@media (min-width: 600px) {
  .page-about .promise__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .page-about .promise__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.page-about .promise__card {
  padding: 1.5rem;
  border-left: 3px solid var(--color-accent);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .promise__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--page-accent-glow);
}
.page-about .promise__card-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text-accent);
  margin: 0 0 0.5rem;
}

/* ===== 联系渠道 ===== */
.page-about .section-contact {
  padding: 2rem 0 3rem;
}
.page-about .contact__wrapper {
  max-width: 640px;
  margin: 2rem auto 0;
}
.page-about .contact__card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem;
  position: relative;
  transition: box-shadow 0.3s ease;
}
.page-about .contact__card:hover {
  box-shadow: 0 0 20px rgba(138,43,226,0.25), var(--page-accent-glow);
}
@media (min-width: 600px) {
  .page-about .contact__card {
    flex-direction: row;
    align-items: center;
  }
}
.page-about .contact__info {
  flex: 1;
}
.page-about .contact__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  margin: 1em 0 0.25em;
}
.page-about .contact__label:first-of-type {
  margin-top: 0;
}
.page-about .contact__link {
  display: inline-block;
  color: var(--color-text-accent);
  text-decoration: none;
  font-size: 1rem;
  transition: color 0.2s;
}
.page-about .contact__link:hover {
  color: var(--color-highlight);
}
.page-about .contact__address {
  color: var(--color-text);
  font-size: 0.95rem;
}
.page-about .contact__note {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-secondary);
  border-top: 1px solid rgba(192,192,192,0.2);
  padding-top: 0.75rem;
}
.page-about .contact__note a {
  color: var(--color-accent);
}
.page-about .contact__visual {
  flex-shrink: 0;
  text-align: center;
}
.page-about .contact__img {
  max-width: 100%;
  height: auto;
  border-radius: 50%;
  transition: transform 0.4s ease;
}
.page-about .contact__img:hover {
  transform: rotate(360deg) scale(1.05);
}
.page-about .contact__disclaimer {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--color-secondary);
  text-align: center;
}

/* ===== 内部链接 ===== */
.page-about .internal-links {
  padding: 1.5rem 0 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.page-about .internal-link {
  color: var(--color-text-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.page-about .internal-link:hover {
  color: var(--color-highlight);
}

/* ===== 全局 pg-section-title 微调 ===== */
.page-about .pg-section-title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.75rem;
  color: var(--color-text-accent);
  margin: 0 0 1rem;
  position: relative;
}
.page-about .pg-section-title::after {
  content: "";
  display: block;
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  margin-top: 0.5rem;
}