/* ============ 关于我们系列专属样式 ============ */

/* 关于我们通用页面横幅 */
.about-banner {
  position: relative;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #1a1a1a, #2d1518);
  overflow: hidden;
}
.about-banner::before {
  content: '寿司精工';
  position: absolute;
  font-family: var(--font-serif);
  font-size: 16rem;
  color: rgba(255,255,255,0.04);
  font-weight: 900;
  letter-spacing: 0.1em;
}
.about-banner-content { position: relative; z-index: 2; }
.about-banner h1 {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: #fff;
  margin-bottom: 0.5rem;
}
.about-banner .breadcrumb {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}
.about-banner .breadcrumb a:hover { color: var(--color-primary-light); }
.about-banner .breadcrumb span { margin: 0 0.5rem; color: var(--color-primary); }

/* 关于我们子页导航 */
.about-subnav {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-mist);
  position: sticky;
  top: 72px;
  z-index: 90;
}
.about-subnav-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
}
.about-subnav-inner a {
  padding: 1.1rem 1.5rem;
  font-size: 0.95rem;
  color: var(--color-slate);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
  font-weight: 500;
}
.about-subnav-inner a:hover { color: var(--color-primary); }
.about-subnav-inner a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 700;
}

/* ===== 公司介绍页 - 故事叙述式 ===== */
.company-intro {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.company-intro-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.company-lead {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  line-height: 1.8;
  color: var(--color-ink);
  text-align: center;
  margin-bottom: 3rem;
  padding: 0 1rem;
}
.company-lead .red { color: var(--color-primary); }
.company-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.company-body p {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-slate);
  text-indent: 2em;
}
.company-values {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  box-shadow: var(--shadow-sm);
}
.value-card {
  text-align: center;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  transition: all 0.3s;
}
.value-card:hover { background: var(--color-sand); }
.value-card .v-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.value-card h4 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}
.value-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 工厂实力页 - 数字+图片网格 ===== */
.factory-showcase {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.factory-hero-img {
  max-width: 1320px;
  margin: 0 auto 3rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 420px;
  background: url('../images/factory.jpg') center/cover;
  position: relative;
  box-shadow: var(--shadow-lg);
}
.factory-hero-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.6));
}
.factory-hero-img .caption {
  position: absolute;
  bottom: 2rem; left: 2rem;
  color: #fff;
  z-index: 2;
}
.factory-hero-img .caption h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin-bottom: 0.3rem;
}
.factory-stats {
  max-width: 1320px;
  margin: 0 auto 4rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.factory-stat {
  background: var(--color-paper);
  padding: 2rem 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--color-primary);
}
.factory-stat .num {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.factory-stat .unit { font-size: 1rem; color: var(--color-accent); }
.factory-stat .label {
  margin-top: 0.8rem;
  font-size: 0.9rem;
  color: var(--color-slate);
}
.factory-features {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.factory-feature {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s;
}
.factory-feature:hover { transform: translateY(-6px); }
.factory-feature-img {
  height: 200px;
  background: linear-gradient(135deg, var(--color-sand), var(--color-mist));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}
.factory-feature-body { padding: 1.5rem; }
.factory-feature-body h4 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
}
.factory-feature-body p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 研发能力页 - 时间线 + 实验室 ===== */
.rd-section {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.rd-hero {
  max-width: 1320px;
  margin: 0 auto 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.rd-hero-img {
  height: 360px;
  border-radius: var(--radius-lg);
  background: url('../images/rd-lab.jpg') center/cover;
  box-shadow: var(--shadow-lg);
}
.rd-hero-text h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  margin-bottom: 1rem;
}
.rd-hero-text p {
  color: var(--color-slate);
  line-height: 1.9;
  margin-bottom: 1rem;
}
.rd-timeline {
  max-width: 900px;
  margin: 0 auto 4rem;
  position: relative;
  padding-left: 2rem;
}
.rd-timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}
.rd-timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}
.rd-timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.3rem;
  width: 14px; height: 14px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 3px solid var(--color-cream);
  box-shadow: 0 0 0 2px var(--color-primary);
}
.rd-timeline-item .year {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}
.rd-timeline-item h4 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}
.rd-timeline-item p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.8;
}
.rd-capabilities {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.rd-cap {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}
.rd-cap:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.rd-cap .icon {
  width: 60px; height: 60px;
  margin: 0 auto 1rem;
  background: var(--color-sand);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}
.rd-cap h4 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.rd-cap p { font-size: 0.85rem; color: var(--color-text-light); }

/* ===== 资质认证页 - 证书画廊 ===== */
.cert-gallery {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.cert-intro {
  max-width: 800px;
  margin: 0 auto 3rem;
  text-align: center;
}
.cert-intro p {
  color: var(--color-slate);
  font-size: 1.05rem;
  line-height: 1.9;
}
.cert-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}
.cert-card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
  cursor: pointer;
}
.cert-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
}
.cert-card-img {
  height: 240px;
  background: linear-gradient(135deg, #f5f0e8, #e5e5e5);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 3px solid var(--color-primary);
}
.cert-card-img .cert-icon {
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.7;
}
.cert-card-img .cert-badge {
  position: absolute;
  top: 1rem; right: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
}
.cert-card-body { padding: 1.5rem; }
.cert-card-body h4 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}
.cert-card-body .cert-no {
  font-size: 0.8rem;
  color: var(--color-stone);
  font-family: var(--font-mono);
  margin-bottom: 0.6rem;
}
.cert-card-body p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
}
.cert-partners {
  max-width: 1320px;
  margin: 0 auto;
  text-align: center;
}
.cert-partners h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 2rem;
}
.partner-logos {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}
.partner-logo {
  height: 80px;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-stone);
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-mist);
  transition: all 0.3s;
}
.partner-logo:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* 关于我们总览页 - 大卡片导航 */
.about-overview {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.about-overview-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}
.about-overview-card {
  position: relative;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-ink);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.4s;
}
.about-overview-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.about-overview-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.85));
  z-index: 1;
}
.about-overview-card .bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s;
  z-index: 0;
}
.about-overview-card:hover .bg { transform: scale(1.08); }
.about-overview-card .content { position: relative; z-index: 2; color: #fff; }
.about-overview-card .num {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary-light);
  line-height: 1;
  opacity: 0.5;
  margin-bottom: 0.5rem;
}
.about-overview-card h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}
.about-overview-card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 1rem;
}
.about-overview-card .arrow {
  color: var(--color-primary-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

@media (max-width: 1024px) {
  .company-body, .rd-hero { grid-template-columns: 1fr; }
  .company-values, .factory-features { grid-template-columns: 1fr; }
  .factory-stats { grid-template-columns: repeat(2,1fr); }
  .rd-capabilities { grid-template-columns: repeat(2,1fr); }
  .cert-grid { grid-template-columns: repeat(2,1fr); }
  .partner-logos { grid-template-columns: repeat(3,1fr); }
  .about-overview-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .factory-stats, .rd-capabilities, .cert-grid { grid-template-columns: 1fr; }
  .about-banner h1 { font-size: 2rem; }
  .partner-logos { grid-template-columns: repeat(2,1fr); }
}