/* ================================================================
   首页 Hero（全屏背景图）
================================================================ */
.hero {
  min-height: 600px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #f1f2f4;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  width: 100%;
}
.hero-title {
  font-size: 50px;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.22;
  margin-bottom: 28px;
  letter-spacing: -0.5px;
}
.hero-desc {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 2;
}

/* ================================================================
   首页：业务4卡
================================================================ */
.biz-section {
  padding: 88px 0;
  background: #fff;
}
.biz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  box-shadow: 0 6px 48px rgba(0, 0, 0, 0.09);
}
.biz-card {
  display: block;
  position: relative;
  height: 400px;
  overflow: hidden;
  margin: 0 3px;
  cursor: pointer;
  transition:
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    z-index 0s;
}
.biz-card:hover {
  transform: scale(1.05);
  z-index: 2;
}
.biz-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.biz-card:hover img {
  transform: scale(1.1);
}
.biz-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(4, 16, 80, 0.85) 0%, rgba(8, 36, 140, 0.28) 52%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: background 0.32s;
}
.biz-card:hover .biz-overlay {
  background: linear-gradient(to top, rgba(20, 80, 220, 0.92) 0%, rgba(20, 80, 220, 0.5) 52%, rgba(20, 80, 220, 0.08) 100%);
}
.biz-name {
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.biz-more {
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 5px;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.28s,
    transform 0.28s;
}
.biz-card:hover .biz-more {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   首页：价值卡（五卡横排）
================================================================ */
.val-section {
  padding: 88px 0;
  background: var(--bg-white);
}
.val-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-radius: 12px;
  overflow: visible;
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.07);
}
.val-card {
  background: #fff;
  border-right: 1px solid #edf0f7;
  padding: 28px 20px 22px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
  z-index: 1;
  transition:
    transform 0.36s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.36s,
    background 0.26s;
}
.val-card:first-child {
  border-radius: 12px 0 0 12px;
}
.val-card:last-child {
  border-right: none;
  border-radius: 0 12px 12px 0;
}
.val-card:hover {
  transform: scale(1.06);
  box-shadow: 0 12px 48px rgba(20, 60, 200, 0.15);
  z-index: 3;
}
.val-card.active {
  background: var(--blue);
}
.val-card.active:hover {
  box-shadow: 0 12px 48px rgba(26, 94, 232, 0.35);
}

.val-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
  transition: color 0.25s;
}
.val-card.active .val-title {
  color: #fff;
}

.val-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.85;
  flex: 1;
  transition: color 0.25s;
}
.val-card.active .val-desc {
  color: rgba(255, 255, 255, 0.82);
}

.val-btn {
  display: none;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  color: #fff;
  font-size: 12px;
  border: 1px solid rgba(255, 255, 255, 0.46);
  padding: 8px 14px;
  border-radius: 3px;
  width: fit-content;
  transition:
    background 0.2s,
    gap 0.2s;
}
.val-card.active .val-btn {
  display: flex;
}
.val-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  gap: 14px;
}

.val-art {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin-top: 14px;
  height: 108px;
}
.val-art img {
  max-height: 100px;
  width: auto;
  object-fit: contain;
  transition: transform 0.36s cubic-bezier(0.22, 1, 0.36, 1);
}
.val-card:hover .val-art img {
  transform: scale(1.08) translateY(-4px);
}

/* ================================================================
   Vision 区
================================================================ */
.vision-section {
  display: flex;
  height: 500px;
}
.vision-photo {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.vision-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}
.vision-photo:hover img {
  transform: scale(1.04);
}
.vision-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, transparent 55%, rgba(16, 48, 168, 0.22) 100%);
}

.vision-right {
  flex: 1;
  background: linear-gradient(145deg, #1442c4, #0c2ea8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px;
  position: relative;
  overflow: hidden;
}
.vision-wm {
  position: absolute;
  top: 23%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 150px;
  font-weight: 900;
  letter-spacing: 14px;
  color: rgba(255, 255, 255, 0.05);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}
.vision-h {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}
.vision-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.42);
  padding: 13px 28px;
  border-radius: 3px;
  font-size: 14px;
  width: max-content;
  position: relative;
  z-index: 1;
  transition:
    background 0.22s,
    border-color 0.22s,
    gap 0.2s;
}
.vision-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.85);
  gap: 18px;
}