/* ========== 三级页面通用样式 ========== */

/* ===== 主题色参考 =====
 * 各页面在 .core-competencies 中覆盖 --theme-primary 和 --theme-primary-light 即可
 *
 * 青 色 #06B6D4 / #2DD4C0  — 数字展览、3D展示、数字文博类
 * 绿 色 #49AF00 / #73D92D  — 模拟训练、智慧管网
 * 橙 色 #FF8000 / #FFA84D  — 应急救援、作战推演
 * 蓝 色 #3453C8 / #5A7BE0  — 智慧实验室、装备数字化
 * ========================= */

/* ===== 页面可覆写的 CSS 变量 =====
 * 各页面在 <style> 中覆盖以下变量即可
 *
 * --h4-icon:         h4 前的图标 (默认 feat_icon_blue.png)
 * --challenge-sprite: 行业痛点雪碧图 (默认 challenge-sprites.png)
 * ========================= */
:root {
  --h4-icon: url('/images/solutions/feat_icon_blue.png');
  --challenge-sprite: url('/images/solutions/digital-exhibition/challenge-sprites.png');
  --detail-gradient: linear-gradient(90deg, #F4FAFF 0%, rgba(244, 250, 255, 0) 100%);
  --detail-gradient-reverse: linear-gradient(270deg, #F4FAFF 0%, rgba(244, 250, 255, 0) 100%);
  --theme-color: #06B6D4;
  --theme-color-dark: #0594b0;
}

/* Banner 文字叠加 */
.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  padding-bottom: 60px;
  box-sizing: border-box;
}

.banner-text {
  max-width: 1760px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.banner-tag {
  display: inline-block;
  padding: 6px 20px;
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--theme-color);
  background: rgba(47, 49, 49, 0.5);
  border: 1px solid color-mix(in srgb, var(--theme-color) 50%, transparent);
  border-radius: 20px;
  letter-spacing: 0.1em;
}

.banner-text h1 {
  font-size: 40px;
  color: #fff;
  font-weight: bold;
  margin: 0 0 24px 0;
  letter-spacing: 0.09em;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

.banner-text p {
  font-size: 20px;
  color: #fff;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  max-width: 700px;
  margin: 0 0 32px 0;
}

.banner-btn {
  display: inline-block;
  padding: 0 28px;
  height: 46px;
  line-height: 46px;
  border-radius: 23px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #fff;
  background: var(--theme-color-dark);
  text-decoration: none;
  transition: all 0.3s ease;
}

.banner-btn:hover {
  background: var(--theme-color);
}

.banner-slide img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* 行业痛点 */
.challenges {
  max-width: 1260px;
  margin: 0 auto;
  padding: 10px 0 40px;
}

.challenges-desc {
  margin: 0 auto 40px;
  text-align: justify;
  font-size: 20px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.03em;
  text-indent: 2em;
  color: #555;
}

.challenges-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.challenge-item {
  text-align: center;
  padding: 30px 20px;
  border-radius: 12px;
  background: #fff;
  transition: all 0.3s ease;
}

.challenge-icon {
  width: 128px;
  height: 128px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--challenge-sprite) no-repeat 0 0 / 512px 128px;
}

.challenge-icon-1 { background-position: 0 0, 0 0; }
.challenge-icon-2 { background-position: -128px 0, 0 0; }
.challenge-icon-3 { background-position: -256px 0, 0 0; }
.challenge-icon-4 { background-position: -384px 0, 0 0; }

.challenge-item h3 {
  font-size: 24px;
  color: #333;
  margin-bottom: 12px;
  letter-spacing: 0.09em;
}

.challenge-item p {
  font-size: 18px;
  color: #666;
  line-height: 1.6em;
  letter-spacing: 0.03em;
  margin: 0;
}

/* 核心能力 */
.core-competencies {
  --theme-primary: #06B6D4;       /* 主色（青） */
  --theme-primary-light: #2DD4C0; /* 辅色 */
  max-width: 1260px;
  margin: 0 auto;
  position: relative;
  padding-top: 10px;
  padding-bottom: 30px;
}

.core-competencies .detail-item {
  display: flex;
  gap: 10px;
  align-items: stretch;
  margin-bottom: 120px;
}
.core-competencies .detail-item.reverse {
  flex-direction: row-reverse;
}
.core-competencies .detail-item .detail-image {
  flex: 0 0 48%;
}
.core-competencies .detail-item .detail-image img {
  width: 100%;
  height: auto;
  display: block;
}
.core-competencies .detail-item .detail-text {
  flex: 0 0 52%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 10px 0 40px;
  box-sizing: border-box;
  position: relative;
}
.core-competencies .detail-item .detail-text::before {
  content: '';
  position: absolute;
  top: -40px;
  left: 0;
  right: 0;
  bottom: -40px;
  /* background: var(--detail-gradient); */
  border-radius: inherit;
  z-index: -1;
  pointer-events: none;
}
.core-competencies .detail-item.reverse .detail-text::before {
  /* background: var(--detail-gradient-reverse); */
}
.core-competencies .detail-item.reverse .detail-text {
  padding: 0 40px 0 10px;
}
.core-competencies .detail-text-inner {
  width: fit-content;
}
.core-competencies .detail-text-inner .line {
  width: 74px;
  height: 5px;
  border-radius: 2.5px;
  background: linear-gradient(90deg, var(--theme-primary) 0%, var(--theme-primary-light) 100%);
  margin-top: 20px;
}
.core-competencies .detail-item .detail-text h4 {
  color: var(--theme-primary);
  font-weight: 600;
  font-size: 24px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.09em;
}

.core-competencies .detail-item .detail-text h4::before {
  content: '';
  display: inline-block;
  width: 40px;
  height: 40px;
  background: var(--h4-icon) no-repeat center / contain;
  flex-shrink: 0;
}


.core-competencies .detail-item .detail-text h5 {
  font-size: 28px;
  color: #1a1a2e;
  font-weight: 400;
  margin: 10px 0;
  letter-spacing: 0.09em;
}
.core-competencies .detail-item .detail-text p {
  font-size: 20px;
  color: #555;
  line-height: 1.6;
  letter-spacing: 0.09em;
  text-align: justify;
}
.core-competencies-desc {
  max-width: 1260px;
  margin: 0 auto 80px;
  text-align: justify;
  font-size: 20px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.03em;
  text-indent: 2em;
  color: #555;
  padding-bottom: 20px;
}

@media (max-width: 768px) {
  .core-competencies .detail-item {
    flex-direction: column;
    padding: 0 10px;
    margin-bottom: 60px;
  }
  .core-competencies .detail-item.reverse {
    flex-direction: column;
  }
  .core-competencies .detail-item .detail-image {
    flex: none;
    width: 100%;
  }
  .core-competencies .detail-item .detail-text {
    flex: none;
    width: 100%;
    padding: 20px 0;
  }
  .core-competencies .detail-item .detail-text::before {
    top: -20px;
    bottom: -20px;
  }
  .core-competencies .detail-item .detail-text h4 {
    font-size: 18px;
  }
  .core-competencies .detail-item .detail-text h5 {
    font-size: 20px;
  }
  .core-competencies .detail-item .detail-text p {
    font-size: 15px;
  }
  .core-competencies .detail-item .detail-text h4::before {
    width: 30px;
    height: 30px;
  }
  .core-competencies-desc {
    padding: 0 10px;
    font-size: 16px;
  }

  .banner-text h1 {
    font-size: 24px;
    margin-bottom: 12px;
  }
  .banner:not(.contact_demo) .banner-text p,
  .banner:not(.contact_demo) .banner-btn {
    display: none;
  }
  .banner-tag {
    font-size: 13px;
    padding: 4px 14px;
  }

  .banner-slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
  }
  .banner .banner-overlay {
    padding-bottom: 20px;
  }
  .banner .banner-overlay .banner-text {
    max-width: 90%;
  }
  .banner .banner-text {
    padding: 0 14px;
  }

  .challenges {
    padding: 10px 0 20px;
  }
  .challenges-items {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 0 10px;
  }
  .challenges-desc {
    padding: 0 10px;
    font-size: 15px;
  }
  .challenge-item {
    padding: 20px 12px;
  }
  .challenge-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 12px;
    background-size: 320px 80px;
  }
  .challenge-icon-1 { background-position: 0 0, 0 0; }
  .challenge-icon-2 { background-position: -80px 0, 0 0; }
  .challenge-icon-3 { background-position: -160px 0, 0 0; }
  .challenge-icon-4 { background-position: -240px 0, 0 0; }
  .challenge-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }
  .challenge-item p {
    font-size: 14px;
  }
}

/* ===== 立即体验 ===== */
.banner.contact_demo {
  position: relative;
}
.banner.contact_demo .banner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.banner.contact_demo .banner-overlay .banner-text {
  max-width: 960px;
  color: #fff;
  text-align: center;
}
.banner.contact_demo .banner-overlay .banner-text h3 {
  font-size: 40px;
  margin-bottom: 20px;
  letter-spacing: 0.09em;
}
.banner.contact_demo .banner-overlay .banner-text p {
  font-size: 20px;
  margin-bottom: 28px;
  line-height: 160%;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.85);
  max-width: none;
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns .btn {
  display: inline-block;
  padding: 0 28px;
  height: 46px;
  line-height: 46px;
  border-radius: 23px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns .btn-primary {
  background: var(--theme-color-dark);
  color: #fff;
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns .btn-primary:hover {
  background: var(--theme-color);
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns .btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.6);
}
.banner.contact_demo .banner-overlay .banner-text .banner-btns .btn-outline:hover {
  border-color: #fff;
}

@media (max-width: 768px) {
  .banner.contact_demo {
    min-height: 260px;
  }
  .banner.contact_demo .banner-slide img {
    height: 100%;
    min-height: 260px;
    object-fit: cover;
  }
  .banner.contact_demo .banner-overlay .banner-text {
    padding: 0 20px;
  }
  .banner.contact_demo .banner-overlay .banner-text h3 {
    font-size: 22px;
    margin-bottom: 12px;
  }
  .banner.contact_demo .banner-overlay .banner-text p {
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 150%;
  }
  .banner.contact_demo .banner-overlay .banner-text .banner-btns {
    flex-wrap: wrap;
    gap: 10px;
  }
  .banner.contact_demo .banner-overlay .banner-text .banner-btns .btn {
    padding: 0 18px;
    height: 38px;
    line-height: 38px;
    font-size: 14px;
    width: auto;
  }

}