/* =========================================================
   AYD · Solutions 总览页专用样式
   大图背景 + 右下角贴合的毛玻璃面板 + 卡片间呼吸间隙
   ========================================================= */

/* ========== 引言区 ========== */
.solutions-intro {
  background: var(--paper);
  padding: 24px 0 100px;
}
.solutions-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 80px;
  align-items: start;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.solutions-intro-label {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
}
.solutions-intro-label .eyebrow {
  margin-bottom: 16px;
}
.solutions-intro-label h3 {
  font-size: 20px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.solutions-intro-body p {
  font-size: 17px;
  color: var(--ink-60);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 720px;
}
.solutions-intro-body p:last-child {
  margin-bottom: 0;
}

@media (max-width: 1020px) {
  .solutions-intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .solutions-intro-label {
    position: static;
  }
}

/* ========== Solutions 网格主容器 ========== */
.solutions-grid-section {
  background: var(--surface);
  padding: 40px 0 120px;
}
.solutions-grid-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* 顶部 2×2 网格 · 20px 间隙 */
.sg-top {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

/* 底部 1×3 网格 · 20px 间隙 · 顶部同时保留 20px 和上面分开 */
.sg-bottom {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 20px;
}

/* ========== 卡片通用样式 ========== */
.sol-card {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--ink);
  text-decoration: none;
  color: inherit;
  isolation: isolate;
}

/* 顶部红线动效 */
.sol-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 5;
}
.sol-card:hover::before {
  transform: scaleX(1);
}

/* 图片 */
.sol-card .sol-image {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.sol-card .sol-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.sol-card:hover .sol-image img {
  transform: scale(1.04);
}

/* 图片占位符 */
.sol-card .sol-image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.25);
  background: #1a1e2a;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ========== 毛玻璃面板 · 贴合右下角 · 高透明度 ========== */
.sol-card .sol-panel {
  position: absolute;
  right: 0;
  bottom: 0;
  max-width: 75%;
  min-width: 320px;
  padding: 26px 28px 24px;
  
  /* 高透明磨砂玻璃效果 */
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px) saturate(160%);
  -webkit-backdrop-filter: blur(4px) saturate(160%);
  
  /* 只在内侧两条边加极细边线 */
  border-top: 0.5px solid rgba(255, 255, 255, 0.2);
  border-left: 0.5px solid rgba(255, 255, 255, 0.2);
  
  color: #fff;
  z-index: 3;
  transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Hover 时面板更亮、更明显 */
.sol-card:hover .sol-panel {
  background: rgba(255, 255, 255, 0.16);
  border-top-color: rgba(255, 255, 255, 0.3);
  border-left-color: rgba(255, 255, 255, 0.3);
}

/* Safari 兜底：不支持 backdrop-filter 时换用深色半透明 */
@supports not (backdrop-filter: blur(4px)) {
  .sol-card .sol-panel {
    background: rgba(10, 14, 26, 0.65);
    border-top-color: rgba(255, 255, 255, 0.12);
    border-left-color: rgba(255, 255, 255, 0.12);
  }
}

/* 编号（01 —） */
.sol-card .sol-num {
  font-size: 10px;
  letter-spacing: 0.22em;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.sol-card .sol-num::after {
  content: '';
  flex: 0 0 28px;
  height: 1px;
  background: rgba(255, 255, 255, 0.5);
}

/* 标题 */
.sol-card .sol-title {
  font-size: 22px;
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 10px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* 描述 */
.sol-card .sol-desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.65;
  margin-bottom: 14px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

/* 子分类标签 */
.sol-card .sol-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.sol-card .sol-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 0.5px solid rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  transition: background 0.3s;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}
.sol-card:hover .sol-tag {
  background: rgba(255, 255, 255, 0.22);
}

/* Explore 箭头 */
.sol-card .sol-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  transition: gap 0.3s;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.sol-card .sol-arrow::after {
  content: '→';
}
.sol-card:hover .sol-arrow {
  gap: 14px;
}

/* ========== 底部紧凑卡片 ========== */
.sg-bottom .sol-card {
  aspect-ratio: 1 / 1;
}
.sg-bottom .sol-card .sol-panel {
  max-width: 85%;
  min-width: 0;
  padding: 20px 22px 18px;
}
.sg-bottom .sol-card .sol-title {
  font-size: 18px;
  margin-bottom: 8px;
}
.sg-bottom .sol-card .sol-desc {
  font-size: 11px;
  margin-bottom: 12px;
  line-height: 1.6;
}
.sg-bottom .sol-card .sol-num {
  margin-bottom: 12px;
}

/* ========== CTA 区 ========== */
.solutions-cta {
  background: var(--ink);
  color: var(--paper);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.solutions-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--brand);
}
.solutions-cta-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: center;
}
.solutions-cta h2 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-bottom: 24px;
}
.solutions-cta p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 520px;
}
.solutions-cta .cta-actions {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.solutions-cta .btn {
  color: var(--paper);
  border-color: var(--paper);
}
.solutions-cta .btn:hover {
  background: var(--paper);
  color: var(--ink);
}
.solutions-cta .btn-red {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--paper);
}
.solutions-cta .btn-red:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: var(--paper);
}
.solutions-cta-right {
  display: grid;
  gap: 20px;
  padding: 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.solutions-cta-right .c-item {
  display: grid;
  gap: 6px;
}
.solutions-cta-right .c-label {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  font-weight: 500;
}
.solutions-cta-right .c-value {
  font-size: 16px;
  color: var(--paper);
  font-weight: 500;
}
.solutions-cta-right .c-value a {
  color: var(--paper);
  transition: color 0.2s;
}
.solutions-cta-right .c-value a:hover {
  color: var(--brand);
}

/* ========== 响应式 ========== */
@media (max-width: 860px) {
  .sg-top {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sg-bottom {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 16px;
  }
  .sol-card .sol-panel {
    max-width: 85%;
    min-width: 0;
    padding: 20px 22px 18px;
  }
  .sol-card .sol-title {
    font-size: 18px;
  }
  .sg-bottom .sol-card {
    aspect-ratio: 4 / 3;
  }
  .solutions-cta-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .solutions-cta {
    padding: 72px 0;
  }
}

@media (max-width: 640px) {
  .solutions-intro {
    padding: 16px 0 64px;
  }
  .solutions-grid-section {
    padding: 24px 0 72px;
  }
  .sol-card .sol-panel {
    max-width: 100%;
    left: 0;
    right: 0;
    padding: 18px 20px 16px;
  }
}