/* =============================================================
   applications.css — Applications 系列页面共享样式
   涵盖 pages: applications.html / walls.html / ceilings.html
   命名：kebab-case / __双下划线 / --双短横 / is- 状态
   ============================================================= */

/* ===== 顶部 Banner（与 products/news 视觉一致） ===== */
.page-banner {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-navy) 100%);
  color: #fff;
  padding: 64px 0 56px;
}
.page-banner__crumb {
  font-size: 13px;
  opacity: 0.85;
  margin-bottom: 18px;
  letter-spacing: 0.3px;
}
.page-banner__crumb a:hover { color: #fff; opacity: 1; }
.page-banner__crumb span { opacity: 0.75; }
.page-banner h1 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.page-banner p {
  font-size: 16px;
  line-height: 1.7;
  max-width: 720px;
  opacity: 0.95;
}

/* ===== Lead Section（放在 banner 下方，全宽介绍段） ===== */
.app-lead {
  padding: 80px 0 40px;
  background: var(--bg-soft);
}
.app-lead__eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.6px;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.app-lead h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  max-width: 900px;
  margin-bottom: 16px;
}
.app-lead__body {
  max-width: 900px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ===== 父级 Applications 门户页：2 张大卡片 ===== */
.app-portal {
  padding: 40px 0 96px;
  background: var(--bg-soft);
}
.app-portal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.app-portal-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 44px 40px 36px;
  background: var(--white);
  border-radius: 14px;
  border: 1px solid var(--line);
  transition: all 0.25s ease;
  overflow: hidden;
}
.app-portal-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0,42,95,0.12);
  border-color: transparent;
}
.app-portal-card__icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-soft);
  border-radius: 14px;
  margin-bottom: 22px;
}
.app-portal-card__icon img { width: 44px; height: 44px; }
.app-portal-card h3 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text);
}
.app-portal-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-3);
  margin-bottom: 26px;
}
.app-portal-card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 0.4px;
}
.app-portal-card__link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform 0.2s ease;
}
.app-portal-card:hover .app-portal-card__link svg { transform: translateX(4px); }

/* ===== 子页 feature 模块：左图右文 / 右图左文 ===== */
.app-feature {
  padding: 64px 0;
}
.app-feature--alt { background: var(--bg-soft); }
.app-feature__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.app-feature__media {
  border-radius: 14px;
  overflow: hidden;
  background: var(--brand-soft);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}
.app-feature__media svg,
.app-feature__media img { width: 100%; height: 100%; display: block; object-fit: cover;}
.app-feature__body { padding: 0 8px; }
.app-feature__eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.6px;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.app-feature__body h2 {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text);
}
.app-feature__body > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  margin-bottom: 14px;
}

/* feature 下的 feature 子要点 list */
.app-feature__list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}
.app-feature__list li {
  font-size: 14px;
  color: var(--text-2);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.app-feature__list li::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  margin-top: 8px;
  background: var(--brand);
  flex-shrink: 0;
}

/* ===== 推荐产品区 ===== */
.app-recommend {
  padding: 72px 0 96px;
  background: var(--bg-soft);
}
.app-recommend--dark {
  background: var(--white);
}
.app-recommend__head {
  text-align: left;
  margin-bottom: 36px;
}
.app-recommend__head h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text);
}
.app-recommend__head p {
  font-size: 15px;
  color: var(--text-3);
  max-width: 640px;
}
.app-recommend__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* ===== 复用首页 product-card，配深色 variant ===== */
.app-recommend .product-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}
.app-recommend .product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0,42,95,0.10);
}
.app-recommend .product-card__image {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--brand-soft);
}
.app-recommend .product-card__image svg,
.app-recommend .product-card__image img {
  width: 100%; height: 100%; display: block;object-fit: cover;
}
.app-recommend .product-card__tag {
  position: absolute;
  top: 12px; left: 12px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.92);
  color: var(--brand);
  border-radius: 999px;
}
.app-recommend .product-card__body { padding: 18px 18px 20px; }
.app-recommend .product-card__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.app-recommend .product-card__desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-3);
  margin-bottom: 10px;
}
.app-recommend .product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
}
.app-recommend .product-card__link svg {
  width: 14px; height: 14px; fill: currentColor;
}

/* ===== CTA 段（在子页末尾引导联系） ===== */
.app-cta {
  padding: 56px 0;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-navy) 100%);
  color: #fff;
  text-align: center;
}
.app-cta h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 10px;
}
.app-cta p {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: 24px;
}
.app-cta .btn { background: #fff; color: var(--brand); }
.app-cta .btn:hover { background: var(--brand-soft); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .app-recommend__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .app-portal-grid { grid-template-columns: 1fr; }
  .app-feature__inner { grid-template-columns: 1fr; gap: 28px; }
  .app-feature__list { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 32px; }
  .page-banner { padding: 44px 0 36px; }
  .app-lead { padding: 48px 0 24px; }
  .app-lead h2 { font-size: 24px; }
  .app-feature__body h2 { font-size: 24px; }
  .app-portal-card { padding: 32px 26px 28px; }
  .app-recommend { padding: 48px 0 56px; }
  .app-recommend__grid { gap: 16px; }
}