/* ============================================================
   jineng-zhengshu.css —— 放射体系图 + 手风琴 新骨架
   ============================================================ */

/* ---------- 首屏：左文右图 ---------- */
.jn-hero {
  position: relative;
  padding: 120px 0 140px;
  background: linear-gradient(100deg, #FFF7DC 0%, #F6FAF7 65%, #EAF3FA 100%);
  overflow: hidden;
}
.jn-hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 48px; align-items: center;
}
.jn-kicker {
  display: inline-block;
  background: #FFE9A8; color: #7a5f14;
  font-weight: 700; border-radius: 20px; padding: 5px 16px; font-size: 14px;
}
.jn-title { font-size: 44px; line-height: 1.3; color: #153238; margin: 16px 0 16px; }
.jn-sub { font-size: 16.5px; line-height: 1.95; color: #2E4A50; max-width: 560px; }
.jn-actions { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }
.jn-hero-img img {
  width: 100%; border-radius: 18px;
  box-shadow: 0 18px 50px rgba(21,50,56,.18);
  aspect-ratio: 16/9; object-fit: cover;
}
.jn-hero-wave { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 120px; }

.split { line-height: 0; overflow: hidden; }
.split svg { display: block; width: 100%; height: 70px; }

/* ---------- 放射图：3x3 网格，中心 hub ---------- */
.jn-orbit {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 720px;
  margin: 44px auto 0;
}
.jn-hub {
  grid-column: 2; grid-row: 2;
  align-self: center; justify-self: center;
  width: 150px; height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #63C79B, #2E9B6E);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  font-weight: 800; font-size: 17px; line-height: 1.5;
  box-shadow: 0 12px 30px rgba(46,155,110,.35);
  border: 4px solid #fff;
}
.jn-node {
  align-self: center; justify-self: center;
  background: #fff;
  border: 1.5px solid #E3EEE7;
  border-radius: 30px;
  padding: 10px 22px;
  color: #153238; font-weight: 700; font-size: 15px;
  box-shadow: 0 4px 12px rgba(21,50,56,.07);
}
.jn-node:nth-child(odd) { border-color: #B9D8EC; color: #24495e; }
.jn-node:nth-child(even) { border-color: #CFE2D6; color: #1c6b4b; }
.jn-orbit-note { text-align: center; margin-top: 26px; color: #8AA3AA; font-size: 13.5px; max-width: 680px; margin-left: auto; margin-right: auto; line-height: 1.9; }

/* ---------- 手风琴 ---------- */
.jn-acc { max-width: 800px; margin: 36px auto 0; display: grid; gap: 12px; }
.jn-details {
  background: #fff;
  border: 1px solid #E3EEE7;
  border-radius: 12px;
  padding: 0 22px;
  transition: box-shadow .2s ease;
}
.jn-details[open] { box-shadow: 0 8px 22px rgba(21,50,56,.08); border-color: #41B383; }
.jn-details summary {
  list-style: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0;
  font-weight: 700; color: #153238; font-size: 16px;
}
.jn-details summary::-webkit-details-marker { display: none; }
.jn-fold {
  width: 12px; height: 12px; flex: none;
  border-right: 2.5px solid #41B383;
  border-bottom: 2.5px solid #41B383;
  transform: rotate(45deg);
  transition: transform .2s ease;
  margin-right: 10px;
}
.jn-details[open] .jn-fold { transform: rotate(225deg); }
.jn-acc-body { padding: 4px 0 20px; }
.jn-acc-body p { color: #58727A; line-height: 2; font-size: 15px; }

/* ---------- 两栏对比 ---------- */
.jn-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  max-width: 860px; margin: 36px auto 0;
}
.jn-comp-col {
  border-radius: 16px; padding: 26px 28px;
}
.jn-comp-a { background: #EAF6EF; border: 1px solid #CFE2D6; }
.jn-comp-b { background: #EAF3FA; border: 1px solid #B9D8EC; }
.jn-comp-col h3 { font-size: 18px; margin-bottom: 14px; }
.jn-comp-a h3 { color: #1c6b4b; }
.jn-comp-b h3 { color: #24495e; }
.jn-comp-col ul { list-style: none; display: grid; gap: 10px; }
.jn-comp-col li {
  padding-left: 20px; position: relative;
  color: #2E4A50; font-size: 14.5px; line-height: 1.8;
}
.jn-comp-a li::before { content: "·"; position: absolute; left: 6px; color: #41B383; font-weight: 800; }
.jn-comp-b li::before { content: "·"; position: absolute; left: 6px; color: #4493C4; font-weight: 800; }

.jn-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 26px; }
.jn-imgs figure { margin: 0; }
.jn-imgs img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 12px; }
.jn-imgs figcaption { margin-top: 8px; color: #8AA3AA; font-size: 13.5px; }

/* ---------- 意义区 ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-2 h3 { font-size: 18px; color: #153238; margin-bottom: 10px; }
.grid-2 p { color: #58727A; line-height: 2; font-size: 15px; margin-bottom: 10px; }

/* ---------- 延伸卡 ---------- */
.jn-link-grid { gap: 16px; }
.jn-link {
  display: block; background: #fff;
  border: 1px solid #E3EEE7; border-radius: 10px;
  padding: 16px 20px; text-decoration: none;
  border-bottom: 4px solid #FFCE33;
  transition: transform .2s ease, box-shadow .2s ease;
}
.jn-link:nth-child(3n+1) { border-bottom-color: #41B383; }
.jn-link:nth-child(3n+2) { border-bottom-color: #4493C4; }
.jn-link strong { display: block; color: #153238; font-size: 16px; margin-bottom: 4px; }
.jn-link span { color: #8AA3AA; font-size: 13.5px; }
.jn-link:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(21,50,56,.12); }

/* ---------- CTA ---------- */
.jn-cta { position: relative; overflow: hidden; margin-top: 20px; }
.jn-cta > img { width: 100%; height: 300px; object-fit: cover; display: block; }
.jn-cta-mask { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(21,50,56,.85), rgba(21,50,56,.35)); }
.jn-cta-inner {
  position: absolute; inset: 0; z-index: 1;
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 8%; color: #fff;
}
.jn-cta-inner h2 { font-size: 28px; margin-bottom: 10px; }
.jn-cta-inner p { opacity: .92; margin-bottom: 16px; max-width: 480px; line-height: 1.8; }

/* ---------- 窄屏 ---------- */
@media (max-width: 900px) {
  .jn-hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .jn-title { font-size: 32px; }
  .jn-orbit { grid-template-columns: 1fr 1fr; }
  .jn-hub { grid-column: 1 / -1; grid-row: auto; }
  .jn-compare, .jn-imgs, .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .jn-actions { flex-direction: column; align-items: stretch; }
  .jn-actions .btn { width: 100%; }
}