@charset "UTF-8";

/* ========== Variables ========== */
:root {
  --primary: #0A32DC;
  --primary-dark: #001f7a;
  --yellow: #FFD600;
  --text-dark: rgba(0, 0, 0, 0.85);
  --text-mid: rgba(0, 0, 0, 0.65);
  --text-light: rgba(0, 0, 0, 0.45);
  --bg-light: #f7f9fc;
  --bg-white: #ffffff;
  --border-color: #e0e0e0;
}

/* ========== Page Header ========== */
.about-page-header {
  padding: 24px 0 0;
  background: #ffffff;
}

.about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.about-breadcrumb a {
  color: var(--text-light);
}

.about-breadcrumb a:hover {
  color: var(--primary);
}

.about-breadcrumb i {
  font-size: 12px;
}

.about-page-title {
  /* 覆盖 main.css 全局 h1 的 SEO 隐藏手法（text-indent:-999px; float:left） */
  float: none;
  text-indent: 0;
  font-size: 32px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

/* ========== Common ========== */
.about-section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.35;
  margin-bottom: 12px;
  text-align: left;
}

.about-section-title-white {
  color: #ffffff;
}

.about-section-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  text-align: left;
}

.about-section-subdesc {
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.4;
  text-align: left;
}

.about-section-desc-white {
  color: rgba(255, 255, 255, 0.7);
}

.about-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8edf2 0%, #d0d8e4 100%);
  color: var(--text-light);
  font-size: 14px;
}

.about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 0;
  transition: all 0.3s ease;
  text-decoration: none;
}

.about-btn-primary {
  background: var(--primary);
  color: #ffffff;
  border: 1px solid var(--primary);
}

.about-btn-primary:hover {
  background: var(--primary-dark);
  color: #ffffff;
}

.about-btn-outline {
  background: transparent;
  color: var(--text-dark);
  border: 1px solid var(--border-color);
}

.about-btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.about-btn-yellow {
  background: var(--yellow);
  color: var(--text-dark);
  border: 1px solid var(--yellow);
}

.about-btn-yellow:hover {
  background: #e6c200;
  color: var(--text-dark);
}

/* ========== Hero ========== */
.about-hero {
  padding: 20px 0 60px;
  background: #ffffff;
}

.about-hero-layout {
  display: flex;
  align-items: center;
  gap: 60px;
}

.about-hero-media {
  flex: 1;
  position: relative;
}

.about-hero-img {
  width: 100%;
}

.about-hero-img img {
  width: 100%;
  height: 100%;
  display: block;
}

.about-hero-tag {
  position: absolute;
  bottom: -16px;
  left: 20px;
  background: var(--yellow);
  color: var(--text-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
}

.about-hero-text {
  width: 420px;
  flex-shrink: 0;
}

.about-hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* ========== Stats ========== */
.about-stats {
  padding: 80px 0;
  background: var(--bg-light);
}

.about-stats-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}

.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.about-stat-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 28px 24px;
  text-align: center;
}

.about-stat-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.about-stat-num span {
  font-size: 18px;
  font-weight: 500;
}

.about-stat-label {
  font-size: 13px;
  color: var(--text-light);
}

/* ========== Research ========== */
.about-research {
  padding: 80px 0;
  background: var(--primary);
}

.about-research-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.about-research-text {
  flex: 1;
}

.about-research-stats {
  display: flex;
  gap: 60px;
}

.about-research-stat {
  text-align: center;
}

.about-research-num {
  font-size: 48px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.about-research-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* ========== Patents ========== */
.about-patents {
  padding: 80px 0;
  background: #ffffff;
}

.about-section-header {
  margin-bottom: 40px;
}

.about-patents-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-patent-card {
  border: 1px solid var(--border-color);
  padding: 16px;
}

.about-patent-img {
  width: 100%;
  margin-bottom: 16px;
}

.about-patent-img img {
  width: 100%;
  height: 100%;
  display: block;
}

.about-patent-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.about-patent-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
}

/* ========== Publications ========== */
.about-pubs {
  padding: 80px 0;
  background: var(--bg-light);
}

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

.about-pub-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 16px;
}

.about-pub-img {
  width: 100%;
  margin-bottom: 16px;
}

.about-pub-img img {
  width: 100%;
  height: 100%;
  display: block;
}

.about-pub-source {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.about-pub-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.about-pub-desc {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.5;
}

/* ========== CTA ========== */
.about-cta {
  padding: 80px 0;
  background: #ffffff;
}

.about-cta-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.about-cta-text {
  max-width: 520px;
}

.about-cta-list {
  list-style: none;
  margin-bottom: 24px;
}

.about-cta-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 8px;
}

.about-cta-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

.about-cta-img {
  width: 420px;
  height: 300px;
  flex-shrink: 0;
}


.wechat-qrcodes {
  display: flex;
  gap: 27px;
  flex-shrink: 0;
}

.wechat-qrcode-item {
  width: 299px;
  height: 438px;
  background: url(../img/home/phone.png) no-repeat;
  background-size: 100% 100%;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.wechat-qrcode-item img {
  width: 183px;
  height: 183px;
  object-fit: contain;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
}

.wechat-qrcode-item span {
  font-weight: 600;
  font-size: 16px;
  color: #000000;
}


/* ========== Responsive: Tablet ========== */
@media (max-width: 1024px) {
  .about-page-title {
    font-size: 28px;
  }

  .about-section-title {
    font-size: 24px;
    text-align: center;
  }

  .about-hero-layout {
    flex-direction: column;
    gap: 40px;
  }

  .about-hero-text {
    width: 100%;
  }

  .about-hero-img {
    height: 300px;
  }

  .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-research-layout {
    flex-direction: column;
    gap: 40px;
  }

  .about-research-stats {
    width: 100%;
    justify-content: center;
  }

  .about-patents-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-pubs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-cta-layout {
    flex-direction: column;
    gap: 40px;
  }

  .about-cta-img {
    width: 100%;
    height: 280px;
  }
}

/* ========== Responsive: Mobile ========== */
@media (max-width: 768px) {
  .about-page-header {
    padding-top: 20px;
  }

  .about-page-title {
    font-size: 24px;
  }

  .about-section-title {
    font-size: 20px;
  }

  .about-hero {
    padding-bottom: 40px;
  }

  .about-hero-img {
    height: 240px;
  }

  .about-hero-actions {
    flex-direction: column;
  }

  .about-stats {
    padding: 60px 0;
  }

  .about-stats-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .about-stat-card {
    padding: 20px 16px;
  }

  .about-stat-num {
    font-size: 28px;
  }

  .about-research {
    padding: 60px 0;
  }

  .about-research-stats {
    flex-direction: column;
    gap: 24px;
  }

  .about-research-num {
    font-size: 36px;
  }

  .about-patents,
  .about-pubs,
  .about-cta {
    padding: 60px 0;
  }

  .about-patents-grid,
  .about-pubs-grid {
    grid-template-columns: 2fr;
    gap: 16px;
  }

  .about-patent-img,
  .about-pub-img {
    width: 100%;
  }

  .about-cta-img {
    height: 220px;
  }

  .wechat-qrcode-item {
    width: 240px;
    height: 300px;
  }

  .wechat-qrcode-item img {
    width: 150px;
    height: 150px;
  }
}

/* ========== Responsive: Small Mobile ========== */
@media (max-width: 480px) {
  .about-stats-grid {
    grid-template-columns: 1fr;
  }

  .about-hero-img {
    height: 200px;
  }

  .about-research-num {
    font-size: 32px;
  }

  .wechat-qrcode-item {
    width: 170px;
    height: 233px;
    /* 200 * 438 / 299，保持手机外框比例 */
  }

  .wechat-qrcode-item img {
    width: 100px;
    height: 100px;
  }
}