/* ============================================
   About Us Page - 成交型重构
   ============================================ */

/* ===== Hero ===== */
.about-hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #0B1A2A 0%, #11263C 50%, #0F2847 100%);
  overflow: hidden;
}
.about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}
.about-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(11,26,42,0.88) 0%, rgba(17,38,60,0.78) 100%);
  z-index: 1;
}
.about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.12;
  background-image: linear-gradient(rgba(0,229,255,0.08) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0,229,255,0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.about-hero__content {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: 80px 0 60px;
}
.about-hero__eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--c-cyan, #00E5FF);
  margin-bottom: 16px;
  font-weight: 600;
}
.about-hero__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #FFFFFF;
}
.about-hero__subtitle {
  font-size: clamp(14px, 2vw, 18px);
  color: rgba(255,255,255,0.65);
  max-width: 680px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.about-hero__trust {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.about-hero__trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}
.about-hero__trust-item .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0,229,255,0.15);
  color: var(--c-cyan, #00E5FF);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== 数据强化模块 ===== */
.stats-bar {
  background: var(--c-bg-2, #11263C);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 40px 0;
}
.stats-bar__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats-bar__item {
  padding: 12px;
}
.stats-bar__number {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  color: var(--c-accent, #FF6A00);
  line-height: 1;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}
.stats-bar__label {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== Company Overview ===== */
.overview {
  background: var(--c-bg-light, #F5F7FA);
}
.overview__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.overview__text {
  color: var(--c-text-dark, #374151);
}
.overview__eyebrow {
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-accent, #FF6A00);
  font-weight: 600;
  margin-bottom: 12px;
}
.overview__title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--c-heading-dark, #111827);
  margin-bottom: 16px;
  line-height: 1.25;
}
.overview__desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text-dark, #374151);
  margin-bottom: 20px;
}
.overview__tagline {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-cyan, #00E5FF);
  background: rgba(0,229,255,0.08);
  padding: 10px 20px;
  border-radius: 8px;
  margin-bottom: 28px;
  border: 1px solid rgba(0,229,255,0.15);
}
.overview__btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--c-accent, #FF6A00);
  color: #FFFFFF;
  font-weight: 600;
  border-radius: var(--btn-radius, 8px);
  font-size: 15px;
  transition: background 0.2s;
}
.overview__btn:hover {
  background: var(--c-accent-h, #FF8533);
}
.overview__media {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: #0a1628;
  min-height: 400px;
}

/* ===== Business Scope ===== */
.business {
  background: var(--c-bg-light, #F5F7FA);
}
.business__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.business__card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 32px 28px;
  border: 1px solid rgba(0,0,0,0.06);
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 220px;
}
.business__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}
.business__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,106,0,0.08);
  border-radius: 10px;
  flex-shrink: 0;
}
.business__icon svg {
  width: 24px;
  height: 24px;
}
.business__card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-heading-dark, #111827);
}
.business__card-desc {
  font-size: 13px;
  color: var(--c-text-dim, #6B7280);
  line-height: 1.7;
}
.business__card-app {
  font-size: 12px;
  color: var(--c-cyan, #00E5FF);
  font-weight: 600;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid rgba(0,0,0,0.05);
}

/* ===== Why Choose ===== */
.why-choose {
  background: var(--c-bg, #0B1A2A);
}
.why-choose__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.why-choose__card {
  background: var(--c-bg-card, #162F4A);
  border-radius: 12px;
  padding: 36px 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.25s, border-color 0.25s;
}
.why-choose__card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,229,255,0.2);
}
.why-choose__card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,106,0,0.1);
  border-radius: 12px;
  flex-shrink: 0;
}
.why-choose__card-icon svg {
  width: 26px;
  height: 26px;
}
.why-choose__card-title {
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}
.why-choose__card-desc {
  font-size: 14px;
  color: var(--c-text, #A8B3C7);
  line-height: 1.75;
}

/* ===== Global Market 地图 ===== */
.global-market {
  background: var(--c-bg-2, #11263C);
}
.global-market__map {
  position: relative;
  width: 100%;
  height: 480px;
  border-radius: 14px;
  background: #0a1628;
  overflow: hidden;
  margin-top: 32px;
}
.global-market__map svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ===== Warehouse ===== */
.warehouse {
  background: var(--c-bg-light, #F5F7FA);
}
.warehouse__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.warehouse__card {
  background: #FFFFFF;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}
.warehouse__card:hover {
  transform: scale(1.02);
  box-shadow: 0 16px 40px rgba(0,0,0,0.1);
}
.warehouse__card-img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.4s;
}
.warehouse__card:hover .warehouse__card-img {
  transform: scale(1.05);
}
.warehouse__card-body {
  padding: 24px;
}
.warehouse__card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-heading-dark, #111827);
  margin-bottom: 8px;
}
.warehouse__card-desc {
  font-size: 14px;
  color: var(--c-text-dim, #6B7280);
  line-height: 1.7;
}
.warehouse__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
}
.warehouse__stat {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 28px 20px;
  border: 1px solid rgba(0,0,0,0.06);
}
.warehouse__stat-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--c-accent, #FF6A00);
  line-height: 1;
  margin-bottom: 6px;
}
.warehouse__stat-label {
  font-size: 13px;
  color: var(--c-text-dim, #6B7280);
  font-weight: 500;
}

/* ===== Milestones 时间轴 ===== */
.milestones {
  background: var(--c-bg, #0B1A2A);
}
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding-top: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 70px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent, #FF6A00), var(--c-cyan, #00E5FF));
  opacity: 0.4;
}
.timeline__item {
  position: relative;
  text-align: center;
  padding: 0 16px;
}
.timeline__dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-accent, #FF6A00);
  border: 3px solid var(--c-bg, #0B1A2A);
  margin: 0 auto 20px;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 0 4px rgba(255,106,0,0.2);
}
.timeline__year {
  font-size: 28px;
  font-weight: 800;
  color: var(--c-accent, #FF6A00);
  margin-bottom: 8px;
}
.timeline__text {
  font-size: 14px;
  color: var(--c-text, #A8B3C7);
  line-height: 1.6;
}

/* ===== Certifications ===== */
.certs {
  background: var(--c-bg-light, #F5F7FA);
}
.certs__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}
.certs__card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 36px 28px;
  border: 1px solid rgba(0,0,0,0.06);
  transition: transform 0.25s, box-shadow 0.25s;
}
.certs__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}
.certs__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,106,0,0.08);
  border-radius: 50%;
  margin: 0 auto 16px;
}
.certs__icon svg {
  width: 28px;
  height: 28px;
}
.certs__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-heading-dark, #111827);
  margin-bottom: 8px;
}
.certs__desc {
  font-size: 13px;
  color: var(--c-text-dim, #6B7280);
  line-height: 1.7;
}

/* ===== Trusted By ===== */
.trusted-by {
  background: var(--c-bg, #0B1A2A);
}
.trusted-by__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.trusted-by__card {
  background: var(--c-bg-card, #162F4A);
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.25s, border-color 0.25s;
}
.trusted-by__card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.2);
}
.trusted-by__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,229,255,0.08);
  border-radius: 12px;
  margin: 0 auto 16px;
}
.trusted-by__icon svg {
  width: 26px;
  height: 26px;
}
.trusted-by__title {
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 6px;
}
.trusted-by__desc {
  font-size: 13px;
  color: var(--c-text, #A8B3C7);
  line-height: 1.6;
}

/* ===== CTA - 优化版：更轻、更高级、更有转化感 ===== */
.about-cta {
  display: block;
  background: linear-gradient(135deg, #0f2a3d, #0c1f2e);
  position: relative;
  overflow: hidden;
  padding: 80px 0;
  text-align: center;
}
.about-cta::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,106,0,0.2), transparent);
  top: -50px;
  right: -50px;
  pointer-events: none;
}
.about-cta__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255,106,0,0.06) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(0,229,255,0.04) 0%, transparent 50%);
  pointer-events: none;
}
.about-cta__content {
  position: relative;
  z-index: 2;
}
.about-cta__title {
  font-size: 36px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 16px;
}
.about-cta__desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.about-cta__buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.about-cta__btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(90deg, #ff6a00, #ff8c1a);
  color: #FFFFFF;
  font-weight: 700;
  border-radius: var(--btn-radius, 8px);
  font-size: 16px;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.about-cta__btn-primary:hover {
  background: linear-gradient(90deg, #ff8533, #ffa64d);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,106,0,0.3);
}
.about-cta__btn-outline {
  display: inline-block;
  padding: 14px 36px;
  border: 1px solid rgba(255,255,255,0.3);
  color: #FFFFFF;
  font-weight: 600;
  border-radius: var(--btn-radius, 8px);
  font-size: 16px;
  transition: border-color 0.2s, background 0.2s;
}
.about-cta__btn-outline:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.08);
}

/* ===== 淡入动画 ===== */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 移动端 ===== */
@media (max-width: 991px) {
  .about-hero__content { padding: 60px 0 40px; }
  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .overview__grid { grid-template-columns: 1fr; gap: 40px; }
  .business__grid { grid-template-columns: repeat(2, 1fr); }
  .why-choose__grid { grid-template-columns: 1fr; }
  .global-market__map { height: 360px; }
  .warehouse__grid { grid-template-columns: 1fr; }
  .warehouse__stats { grid-template-columns: repeat(3, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
  .timeline::before { display: none; }
  .certs__grid { grid-template-columns: repeat(2, 1fr); }
  .trusted-by__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .about-hero { min-height: 400px; }
  .about-hero__trust { gap: 16px; }
  .stats-bar__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: 8px;
  }
  .stats-bar__item { min-width: 140px; scroll-snap-align: start; }
  .business__grid { grid-template-columns: 1fr; }
  .global-market__map { height: 280px; }
  .warehouse__stats { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .timeline__item { text-align: left; padding-left: 32px; }
  .timeline__dot { position: absolute; left: 0; top: 4px; margin: 0; }
  .certs__grid { grid-template-columns: 1fr; }
  .trusted-by__grid { grid-template-columns: 1fr; }
  .about-cta__buttons { flex-direction: column; align-items: center; }
}

/* CTA 固定底部（移动端） */
@media (max-width: 767px) {
  .about-cta__sticky {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(11,26,42,0.95);
    backdrop-filter: blur(12px);
    padding: 12px 16px;
    display: flex;
    gap: 10px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .about-cta__sticky .about-cta__btn-primary,
  .about-cta__sticky .about-cta__btn-outline {
    flex: 1;
    text-align: center;
    padding: 12px 16px;
    font-size: 14px;
  }
  .about-cta { padding-bottom: 100px; }
}