/* sections.css — 各 section 样式 */

/* ===== 通用 section ===== */
.section {
  padding: var(--spacing-lg) 0;
}

.section__title {
  text-align: center;
  font-size: var(--font-size-xl);
  color: var(--color-text-main);
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 3rem;
  height: 3px;
  background: var(--color-primary);
}

/* ===== 数据产品区 ===== */
.products {
  background: var(--color-bg-light);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.product-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  background: white;
  min-height: 280px;
}

.product-card__front {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  height: 100%;
  text-align: center;
}

.product-card__front img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: var(--spacing-sm);
}

.product-card__front h3 {
  font-size: var(--font-size-lg);
  color: var(--color-text-main);
}

.product-card__back {
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  text-align: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.product-card__back h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.product-card__back p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.product-card:hover .product-card__back {
  opacity: 1;
}

/* ===== 风控研究区 ===== */
.research {
  background: white;
}

.research__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.research-card {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.research-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.research-card__info {
  padding: var(--spacing-md);
  background: white;
}

.research-card__info h3 {
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-main);
  margin-bottom: var(--spacing-sm);
}

.research-card__detail {
  margin-top: -100%;
  overflow: hidden;
  transition: margin-top var(--transition-fast);
}

.research-card__detail hr {
  border: none;
  border-top: 1px solid #eee;
  margin-bottom: var(--spacing-sm);
}

.research-card__detail p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.research-card:hover .research-card__detail {
  margin-top: 0;
}

/* ===== 深度分析区 ===== */
.analysis {
  background: var(--color-bg-light);
}

.analysis__content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.analysis__text {
  flex: 1;
  font-size: var(--font-size-base);
  line-height: 2;
  color: var(--color-text-main);
}

.analysis__img {
  flex: 0 0 45%;
  max-width: 45%;
  border-radius: 8px;
}

/* ===== 客户案例区 ===== */
.customers {
  background: white;
}

.customers__subtitle {
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.logo-scroll {
  overflow: hidden;
  width: 100%;
  margin-bottom: var(--spacing-md);
}

.logo-scroll__track {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  width: max-content;
  animation: scroll-left 30s linear infinite;
}

.logo-scroll:hover .logo-scroll__track {
  animation-play-state: paused;
}

.logo-scroll__track img {
  height: 60px;
  width: auto;
  object-fit: contain;
  filter: grayscale(30%);
  transition: filter var(--transition-fast);
}

.logo-scroll__track img:hover {
  filter: grayscale(0%);
}

@keyframes scroll-left {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ===== 数据库介绍区（上市公司智能分析 / 内部控制与风险管理） ===== */
.db-intro--smart {
  background: white;
}

.db-intro--ic {
  background: var(--color-bg-light);
}

.section__subtitle {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: calc(var(--spacing-sm) * -1);
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.05em;
}

.db-intro__content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.db-intro__content--reverse {
  flex-direction: row-reverse;
}

.db-intro__img-wrap {
  flex: 0 0 42%;
  max-width: 42%;
}

.db-intro__img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.db-intro__detail {
  flex: 1;
}

.db-intro__detail p {
  font-size: var(--font-size-base);
  line-height: 1.9;
  color: var(--color-text-main);
  margin-bottom: var(--spacing-sm);
}

.db-intro__tags {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.db-tag {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.db-tag__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3369D2 0%, #5b8ef0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(51, 105, 210, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.db-tag__icon svg {
  width: 26px;
  height: 26px;
  stroke: #fff;
}

.db-tag:hover .db-tag__icon {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(51, 105, 210, 0.45);
}

.db-tag span {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
}

/* ===== 首屏 Hero 轮播（第一张 slide） ===== */
.carousel__caption--hero {
  width: 100%;
  max-width: var(--container-max);
  padding: 0 var(--spacing-md);
}

.hero-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  width: 100%;
}

.hero-card__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.hero-card__text-img {
  max-width: 420px;
  height: auto;
}

.hero-card__btn {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 2.5rem;
  border-radius: 4px;
  font-size: var(--font-size-lg);
  font-weight: 600;
  transition: background var(--transition-fast);
  text-decoration: none;
}

.hero-card__btn:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.hero-card__img {
  max-width: 50%;
  height: auto;
  flex-shrink: 0;
}

/* 数据库介绍区"进入数据库"按钮 */
.db-intro__cta {
  display: inline-block;
  margin-top: var(--spacing-sm);
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.6rem 2rem;
  border-radius: 4px;
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: background var(--transition-fast);
  text-decoration: none;
}

.db-intro__cta:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

@media (max-width: 767px) {
  .hero-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-card__text {
    align-items: center;
  }

  .hero-card__text-img {
    max-width: 80%;
  }

  .hero-card__img {
    max-width: 80%;
  }
}