/* =============================================================================
   solutions.css — 方案列表/详情页新设计（v1，源自设计稿 solutions.css）
   全部选择器 scope 在 .sol 下（页面 <main class="sol">），不影响全站；
   设计稿中的 site-header/site-footer/hero/card 等未用样式已剔除。
   ============================================================================= */
.sol{font-family:Inter,Arial,sans-serif;color:#17202a;background:#fff;line-height:1.7}
.sol a{color:inherit;text-decoration:none}
.sol .container{width:min(1180px,92%);margin:auto}
.sol .kicker,.sol .eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#7a8590}
.sol .page-hero .kicker,.sol .detail-hero .kicker{color:#aab3bc}
.sol .page-hero h1,.sol .detail-hero h1{font-size:clamp(42px,5.5vw,72px);line-height:1.08;letter-spacing:-.045em;margin:18px 0 25px;max-width:850px}
.sol .lead{font-size:19px;line-height:1.75;color:#c8cfd6;max-width:760px}
.sol .btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border:1px solid #cfd5db;font-size:13px;font-weight:600;transition:.2s}
.sol .btn.primary{background:#fff;color:#111;border-color:#fff}
.sol .btn.primary:hover{background:#e9edf0}
.sol .section{padding:105px 0}
.sol .text-link{font-size:13px;font-weight:600;border-bottom:1px solid #b7bec5;padding-bottom:4px;white-space:nowrap}
.sol .page-hero{background:#111820;color:#fff;padding:90px 0 80px}
.sol .page-hero h1{font-size:58px;line-height:1.1;letter-spacing:-.04em;margin:15px 0}
.sol .page-hero p{color:#b9c1c8;max-width:700px}
.sol .list-layout{display:grid;grid-template-columns:230px 1fr;gap:75px}
.sol .filter{display:flex;flex-direction:column;align-self:start;position:sticky;top:105px}
.sol .filter .kicker{margin-bottom:15px}
.sol .filter a{padding:10px 0;border-bottom:1px solid #eceff1;font-size:13px;color:#6b747d}
.sol .filter a.selected,.sol .filter a:hover{color:#111;font-weight:600}
.sol .list-item{display:grid;grid-template-columns:55px minmax(0,1fr) 300px;gap:25px;padding:0 0 38px;margin-bottom:38px;border-bottom:1px solid #e4e7ea}
.sol .list-item.no-cover{grid-template-columns:55px minmax(0,1fr)}
.sol .list-item .num{font-size:12px;font-weight:700;color:#9aa3ab;padding-top:8px}
.sol .list-item h2{font-size:28px;line-height:1.25;margin:8px 0 12px;letter-spacing:-.025em}
.sol .list-item h2 a:hover{color:#3742c8}
.sol .list-item p{color:#68727c;max-width:720px;margin:0 0 18px}
/* 右侧封面缩略图（4:3，纯装饰链重复主链接故 aria-hidden；无图行加 no-cover 退回两列） */
.sol .list-item-cover{display:block;align-self:start;overflow:hidden;aspect-ratio:4/3;background:#f2f4f6}
.sol .list-item-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .45s ease}
.sol .list-item:hover .list-item-cover img{transform:scale(1.04)}
.sol .detail-hero{background:#111820;color:#fff;padding:90px 0 85px}
.sol .detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:90px}
.sol .article h2{font-size:38px;line-height:1.2;letter-spacing:-.03em;margin:15px 0 25px}
.sol .article h3{font-size:22px;margin:40px 0 10px}
.sol .article p,.sol .article li{font-size:16px;color:#596570}
.sol .article ul{padding-left:22px}
.sol .article img{max-width:100%;height:auto}
.sol .detail-side>div{border:1px solid #e2e6ea;padding:25px;position:sticky;top:105px}
.sol .detail-side .eyebrow{display:block;margin-bottom:15px}
.sol .detail-side a{display:block;padding:12px 0;border-top:1px solid #eceff1;font-size:13px;font-weight:600}
.sol .detail-side a:hover{color:#3742c8}
.sol .detail-side a:first-of-type{border-top:0}
.sol .cta{background:#111820;color:#fff;padding:85px 0}
.sol .cta .kicker{color:#9da8b2}
.sol .cta h2{font-size:40px;line-height:1.15;letter-spacing:-.035em;margin:13px 0 0;max-width:700px}
.sol .cta p{color:#aeb7bf;margin:15px 0 30px}
.sol .sol-empty{padding:50px 20px;border:1px dashed #d5dade;color:#68727c}
/* 面包屑条（public/crumb 局部；hero 下方浅色条，底线与列表行分隔色一致） */
.sol .crumb-bar{padding:16px 0 14px;border-bottom:1px solid #eef1f3}
.sol .crumb-bar .tw-crumbs{margin-bottom:0}
.sol .crumb-bar .tw-crumbs a:hover{color:#111}

@media(max-width:900px){
  .sol .detail-grid{grid-template-columns:1fr;gap:45px}
  .sol .list-layout{grid-template-columns:1fr;gap:35px}
  .sol .filter{position:static}
  .sol .list-item{grid-template-columns:55px minmax(0,1fr) 240px;gap:20px}
  .sol .list-item.no-cover{grid-template-columns:55px minmax(0,1fr)}
  .sol .page-hero h1{font-size:44px}
  .sol .detail-hero h1{font-size:48px}
}
@media(max-width:600px){
  .sol .section{padding:70px 0}
  .sol .detail-hero h1{font-size:40px}
  .sol .page-hero h1{font-size:38px}
  .sol .lead{font-size:16px}
  .sol .btn{width:100%}
  .sol .list-item,.sol .list-item.no-cover{grid-template-columns:35px 1fr;gap:15px}
  .sol .list-item-cover{grid-column:1/-1;order:-1;aspect-ratio:16/9}
  .sol .list-item h2{font-size:23px}
  .sol .article h2{font-size:30px}
}