/* ==========================================================================
   关于我们
   ========================================================================== */

/* 公司介绍 + 四项要点 */
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(40px, 7vw, 120px);
}

.intro > * {
  min-width: 0;
}

.intro .prose {
  display: grid;
  gap: 22px;
  margin-top: 18px;
  font-size: 16px;
  line-height: 2.05;
}

.hl4 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}

.hl4 div {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 28px 28px 30px 0;
  border-bottom: 1px solid var(--line);
}

.hl4 div:nth-child(even) {
  padding-left: 28px;
  padding-right: 0;
  border-left: 1px solid var(--line);
}

.hl4 b {
  font: 300 24px var(--head);
  letter-spacing: 0.04em;
  color: var(--ink);
}

.hl4 p {
  font-size: 14px;
  color: var(--muted);
}

/* 企业精神 */
.section.spirit-sec {
  padding-top: 0;
}

.spirit {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
  gap: 40px;
  min-height: 560px;
  padding: clamp(48px, 7vw, 96px);
  overflow: hidden;
  background: var(--dark);
  color: var(--on-dark-2);
}

.spirit img.bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.spirit::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(var(--shade), 0.75), rgba(var(--shade), 0) 70%);
  pointer-events: none;
}

.spirit > div {
  position: relative;
  z-index: 1;
}

.spirit .kicker {
  color: rgba(255, 255, 255, 0.55);
}

.spirit h2 {
  margin-top: 16px;
  font-size: clamp(36px, 4.6vw, 64px);
  font-weight: 200;
  line-height: 1.35;
  letter-spacing: 0.14em;
  color: #fff;
}

.spirit-body {
  display: grid;
  gap: 22px;
}

.spirit-body p {
  max-width: 26em;
  font-size: 15px;
  line-height: 1.9;
}

/* 合作伙伴 */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.partner-grid div {
  display: grid;
  place-items: center;
  height: 128px;
  padding: 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.partner-grid img {
  width: auto;
  max-height: 52px;
  filter: grayscale(1);
  opacity: 0.6;
  mix-blend-mode: multiply;
  transition:
    filter 0.4s,
    opacity 0.4s;
}

.partner-grid div:hover img {
  filter: none;
  opacity: 1;
}

/* 最后一格“欢迎合作” */
.pg-note .small {
  font-weight: 600;
  color: var(--brand);
}

/* 联系我们：说明 + 留言表单 */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
  gap: clamp(40px, 7vw, 120px);
}

.contact > * {
  min-width: 0;
}

.contact-intro {
  display: grid;
  align-content: start;
}

.contact-intro h2,
.contact-intro .lead {
  margin-top: 18px;
}

.form-card {
  display: grid;
  gap: 28px;
}

@media (max-width: 960px) {
  .intro {
    grid-template-columns: 1fr;
  }

  .partner-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .spirit {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .hl4 b {
    font-size: 20px;
  }

  .spirit {
    min-height: 420px;
    padding: 36px 24px;
  }

  .contact {
    gap: 28px;
  }
}

@media (max-width: 560px) {
  .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .hl4 {
    grid-template-columns: 1fr;
  }

  .hl4 div:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }
}