/* ========================================
   农链数科™ - 三板块体系样式
   农业科技 / 餐饮科技 / 银发科技
   依赖 style.css 的 VI 变量
   ======================================== */

:root {
  --agri: #2EAD5E;
  --agri-light: #E8F5E9;
  --food: #E08A3C;
  --food-light: #FDF2E7;
  --silver: #3FA9A0;
  --silver-light: #EAF6F5;
}

/* ===== 导航下拉 ===== */
.nav-has-sub {
  position: relative;
}

.nav-caret {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 6px;
  margin-bottom: 2px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition);
}

.nav-sub {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 208px;
  padding: 8px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-divider);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 120;
}

.nav-has-sub:hover .nav-sub,
.nav-has-sub:focus-within .nav-sub {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-has-sub:hover .nav-caret {
  transform: rotate(225deg);
}

.nav-sub li {
  display: block;
}

.nav-sub li a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

.nav-sub li a span {
  margin-left: 6px;
  font-size: 12px;
  color: var(--color-text-light);
}

.nav-sub li a::after {
  display: none;
}

.nav-sub li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-sub li a:hover span {
  color: var(--color-primary);
}

.nav-sub li a.active-sub {
  color: var(--color-primary);
  font-weight: 500;
  background: var(--color-primary-light);
}

/* ===== 三板块概览 ===== */
.section-divisions {
  background: var(--color-bg);
}

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

.div-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 28px 28px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-divider);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.div-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--div-color, var(--color-primary));
}

.div-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.div-card-agri { --div-color: var(--agri); }
.div-card-food { --div-color: var(--food); }
.div-card-silver { --div-color: var(--silver); }

.div-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.div-icon {
  flex: none;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--div-bg, var(--color-primary-light));
  color: var(--div-color, var(--color-primary));
}

.div-icon svg {
  width: 22px;
  height: 22px;
}

.div-card-agri .div-icon { background: var(--agri-light); }
.div-card-food .div-icon { background: var(--food-light); }
.div-card-silver .div-icon { background: var(--silver-light); }

.div-name {
  font-size: var(--fs-card);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.div-slogan {
  display: block;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--div-color, var(--color-primary));
}

.div-desc {
  flex: 1;
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.div-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.div-meta span {
  padding: 3px 10px;
  font-size: 12px;
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text-light);
}

.div-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--div-color, var(--color-primary));
}

.div-card:hover .div-link {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ===== 板块预览段（首页内的板块摘要）===== */
.section-band {
  padding-top: calc(var(--spacing-2xl) * 0.7);
}

.section-band .section-header .section-tag {
  color: var(--band-color, var(--color-primary));
}

.band-foot {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-lg);
}

/* ===== 银发两屏 ===== */
.section-silver {
  background: linear-gradient(180deg, #F7FBFA 0%, #F2F8F7 100%);
}

.silver-lead {
  max-width: 760px;
  margin: 0 auto var(--spacing-lg);
  text-align: center;
  font-size: 17px;
  color: var(--color-text-light);
}

.silver-lead strong {
  color: var(--color-text);
  font-weight: 600;
}

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

.silver-card {
  padding: 28px 24px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid rgba(63, 169, 160, 0.18);
  box-shadow: var(--shadow-sm);
}

.silver-card-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--silver);
  background: var(--silver-light);
  border-radius: 999px;
}

.silver-card h3 {
  font-size: var(--fs-card);
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.silver-card p {
  font-size: 15px;
  color: var(--color-text-light);
}

/* 守护响应链路 */
.silver-flow {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-top: var(--spacing-xl);
}

.silver-step {
  flex: 1;
  padding: 20px 16px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-divider);
  text-align: center;
}

.silver-step-no {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--silver);
  margin-bottom: 8px;
}

.silver-step h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.silver-step p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.silver-arrow {
  display: flex;
  align-items: center;
  color: var(--silver);
  font-size: 16px;
}

.silver-note {
  margin-top: var(--spacing-md);
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-light);
  background: rgba(255, 255, 255, 0.7);
  border-left: 3px solid var(--silver);
  border-radius: var(--radius-sm);
}

.silver-note strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ===== 板块页 Hero 补充 ===== */
.banner-slogan {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 999px;
}

/* 板块页交付与边界 */
.section-boundary {
  background: var(--color-white);
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.boundary-item {
  padding: 24px;
  background: var(--color-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--band-color, var(--color-primary));
}

.boundary-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.boundary-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
}

/* ===== 试点招募卡 ===== */
.pilot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.pilot-card {
  padding: 26px 24px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-divider);
  box-shadow: var(--shadow-sm);
}

.pilot-card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.pilot-card h3::before {
  content: "";
  width: 3px;
  height: 16px;
  background: var(--band-color, var(--color-primary));
  border-radius: 2px;
}

.pilot-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-light);
}

/* 痛点四卡：把「四件事」显性化为一条守护链路的四段 */
.pain-step {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #2E8B84;
  background: rgba(63, 169, 160, 0.1);
  border-radius: 3px;
}

/* ===== 方案分层（纵向五层）===== */
.layer-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.layer-item {
  display: flex;
  gap: 20px;
  padding: 22px 24px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--band-color, var(--color-primary));
}

.layer-no {
  flex: none;
  width: 44px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--band-color, var(--color-primary));
}

.layer-main h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.layer-main p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
}

.layer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.layer-tags span {
  padding: 3px 10px;
  font-size: 12px;
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text-light);
}

/* ===== 板块页 Banner 配图 ===== */
.page-banner.has-visual .container {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.banner-copy {
  flex: 1;
  min-width: 0;
}

.page-banner.has-visual h1 {
  font-size: clamp(30px, 3.4vw, 46px);
}

.page-banner.has-visual p {
  max-width: 100%;
}

.page-banner.has-visual .banner-visual {
  width: 356px;
}

.banner-visual {
  flex: none;
  width: 340px;
  align-self: center;
}

.banner-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 26px 60px rgba(8, 32, 46, 0.32);
}

/* ===== 银发产品形态（图文两栏）===== */
.section-product {
  background: var(--color-white);
}

.product-split {
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.product-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #F3EDE4;
  box-shadow: var(--shadow-xl);
}

.product-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.product-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 18px 12px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.88);
  background: linear-gradient(180deg, rgba(28, 22, 14, 0) 0%, rgba(28, 22, 14, 0.62) 100%);
}

.product-info h3 {
  font-size: var(--fs-card);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.product-info .product-sub {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.product-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0 0 22px;
}

.product-point {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.product-point .pt-label {
  flex: none;
  padding: 3px 11px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  border-radius: 999px;
  color: var(--silver);
  background: var(--silver-light);
}

.product-point p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.product-specs span {
  padding: 5px 13px;
  font-size: 12.5px;
  border-radius: 999px;
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid rgba(63, 169, 160, 0.3);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .banner-visual {
    display: none;
  }

  .product-split {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

@media (max-width: 1024px) {
  .divisions-grid,
  .silver-grid {
    grid-template-columns: 1fr;
  }

  .silver-flow {
    flex-direction: column;
  }

  .silver-arrow {
    justify-content: center;
    transform: rotate(90deg);
  }
}

@media (max-width: 767px) {
  .div-card {
    padding: 24px 20px;
  }

  .layer-item {
    flex-direction: column;
    gap: 8px;
  }

  .silver-step {
    text-align: left;
  }

  .boundary-grid,
  .pilot-grid {
    grid-template-columns: 1fr;
  }

  .nav-sub {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    padding: 0 0 0 12px;
    min-width: 0;
    background: transparent;
  }

  .nav-caret {
    display: none;
  }
}