/* 样式仅挂在 .gxdbt，避免影响主站头尾 */
.gxdbt {
  --gx-blue: #2f6bff;
  --gx-blue-soft: #5b8cff;
  --gx-navy: #1a2744;
  --gx-text: #4a5568;
  --gx-muted: #7b8494;
  --gx-line: #d7e4ff;
  --gx-bg: #f5f7fb;
  --gx-dark: #243a6b;
  --gx-card: #ffffff;
  --gx-wrap: 1200px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--gx-text);
  line-height: 1.7;
  font-size: 15px;
  background: transparent;
}

.gxdbt *,
.gxdbt *::before,
.gxdbt *::after {
  box-sizing: border-box;
}

.gxdbt img {
  max-width: 100%;
  height: auto;
  border: 0;
  vertical-align: middle;
}

.gxdbt h1,
.gxdbt h2,
.gxdbt h3,
.gxdbt p {
  margin: 0;
}

.gxdbt-wrap {
  width: min(100% - 40px, var(--gx-wrap));
  margin: 0 auto;
}

/* ----- Hero ----- */
.gxdbt-hero {
  min-height: 560px;
  display: flex;
  align-items: center;
  background-color: #c5dff5;
  background-image: url("../images/hero-bg.png");
  background-repeat: no-repeat;
  background-position: right center;
  background-size: cover;
}

.gxdbt-hero__copy {
  max-width: 640px;
  padding: 64px 0;
}

.gxdbt-hero__badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--gx-blue);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.gxdbt-hero__title {
  margin-top: 18px;
  color: var(--gx-navy);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.04em;
}

.gxdbt-hero__slogan {
  margin-top: 14px;
  color: var(--gx-navy);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
}

.gxdbt-hero__desc {
  margin-top: 14px;
  max-width: 560px;
  color: #5c6573;
  font-size: 14px;
  line-height: 1.85;
}

.gxdbt-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.gxdbt-hero__tags span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 108px;
  padding: 8px 22px;
  border: 1px solid #9bb8e6;
  border-radius: 999px;
  background: #fff;
  color: #3d6cb5;
  font-size: 14px;
}

/* ----- Sections ----- */
.gxdbt-sec {
  padding: 80px 0;
}

.gxdbt-sec--plain {
  background: #fff;
}

.gxdbt-sec--muted {
  background: var(--gx-bg);
}

.gxdbt-sec--dark {
  background: var(--gx-dark);
}

.gxdbt-hd {
  text-align: center;
  margin-bottom: 48px;
}

.gxdbt-hd__title {
  color: var(--gx-navy);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.gxdbt-hd__sub {
  margin-top: 16px;
  color: var(--gx-muted);
  font-size: 14px;
}

.gxdbt-hd--light .gxdbt-hd__title {
  color: #fff;
}

.gxdbt-hd--light .gxdbt-hd__sub {
  color: rgba(255, 255, 255, 0.78);
}

/* ----- Problems ----- */
.gxdbt-problems {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gxdbt-problem {
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 24px 20px 18px;
  border: 1px solid var(--gx-line);
  border-radius: 12px;
  background: var(--gx-card);
  box-shadow: 0 8px 24px rgba(47, 107, 255, 0.05);
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.gxdbt-problem:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(15, 45, 100, 0.08);
}

.gxdbt-problem h3 {
  color: var(--gx-navy);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.gxdbt-problem__lead {
  margin-top: 6px;
  color: var(--gx-blue);
  font-size: 15px;
  font-weight: 600;
}

.gxdbt-problem__body {
  margin-top: 12px;
  color: var(--gx-text);
  font-size: 13px;
  line-height: 1.8;
}

.gxdbt-problem__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 18px;
}

.gxdbt-problem__foot img {
  width: 52px;
  height: 52px;
}

.gxdbt-problem__foot span {
  color: #c5d4f5;
  font-size: 28px;
  font-style: italic;
  font-weight: 700;
  line-height: 1;
}

/* ----- Architecture ----- */
.gxdbt-arch {
  padding: 12px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(26, 39, 68, 0.06);
}

.gxdbt-arch img {
  display: block;
  width: 100%;
}

/* ----- Solutions (stacked rows) ----- */
.gxdbt-sols {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.gxdbt-sol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.gxdbt-sol--flip .gxdbt-sol__media {
  order: -1;
}

.gxdbt-sol__copy h3 {
  color: var(--gx-navy);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.45;
}

.gxdbt-sol__copy em {
  font-style: normal;
  color: var(--gx-blue);
}

.gxdbt-sol__copy p {
  margin-top: 16px;
  color: var(--gx-text);
  font-size: 15px;
  line-height: 1.9;
}

.gxdbt-sol__media {
  border-radius: 14px;
  overflow: hidden;
}

.gxdbt-sol__media img {
  display: block;
  width: 100%;
}

/* ----- Features ----- */
.gxdbt-feats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gxdbt-feat {
  padding: 28px 20px 24px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  text-align: center;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.gxdbt-feat:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.18);
}

.gxdbt-feat img {
  width: 72px;
  height: 72px;
}

.gxdbt-feat h3 {
  margin-top: 18px;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.gxdbt-feat p {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  line-height: 1.8;
  text-align: left;
}

/* ----- Values ----- */
.gxdbt-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.gxdbt-value {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 24px;
  border: 1px solid #e8eef8;
  border-radius: 12px;
  background: #f8faff;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.gxdbt-value:hover {
  transform: translateY(-3px);
  border-color: #d0e0f8;
  box-shadow: 0 12px 28px rgba(15, 45, 100, 0.1);
}

.gxdbt-value__copy {
  flex: 1;
  min-width: 0;
}

.gxdbt-value h3 {
  color: var(--gx-navy);
  font-size: 18px;
  font-weight: 700;
}

.gxdbt-value p {
  margin-top: 10px;
  color: var(--gx-text);
  font-size: 13px;
  line-height: 1.8;
}

.gxdbt-value img {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: 12px;
}

/* ----- Responsive ----- */
@media (max-width: 1100px) {
  .gxdbt-problems,
  .gxdbt-feats {
    grid-template-columns: 1fr 1fr;
  }

  .gxdbt-sol {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .gxdbt-sol__media {
    order: -1;
  }

  .gxdbt-hero__title {
    font-size: 34px;
  }
}

@media (max-width: 720px) {
  .gxdbt-hero {
    min-height: 0;
    background-position: 70% center;
  }

  .gxdbt-hero__copy {
    max-width: none;
    padding: 48px 0 56px;
  }

  .gxdbt-hero__title {
    font-size: 28px;
  }

  .gxdbt-hero__slogan {
    font-size: 16px;
  }

  .gxdbt-sec {
    padding: 56px 0;
  }

  .gxdbt-hd__title {
    font-size: 26px;
  }

  .gxdbt-problems,
  .gxdbt-feats,
  .gxdbt-values {
    grid-template-columns: 1fr;
  }

  .gxdbt-sol__copy h3 {
    font-size: 22px;
  }
}