/* 立捷印刷官网 · 静态站样式（2026-09） */
:root{
  --blue:#0d3b66; --blue2:#14538f; --red:#c8102e; --gold:#c9a227;
  --ink:#222; --gray:#666; --line:#e6e9ee; --bg:#f5f7fa;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;color:var(--ink);
  font-size:15px;line-height:1.7;background:#fff}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
.wrap{width:1200px;max-width:94%;margin:0 auto}

/* 顶部条 */
.topbar{background:var(--blue);color:#dbe6f3;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#fff}

/* 头部 */
.header{background:#fff;border-bottom:2px solid var(--blue)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo img{height:56px;width:auto}
.tel{display:flex;gap:26px;align-items:center}
.tel div{text-align:right;line-height:1.25}
.tel span{display:block;font-size:12px;color:var(--gray)}
.tel strong{font-size:20px;color:var(--blue);letter-spacing:.5px}

/* 导航 */
.nav{background:var(--blue2)}
.nav ul{display:flex;flex-wrap:wrap;justify-content:center}
.nav li{list-style:none}
.nav a{display:block;color:#fff;padding:13px 15px;font-size:14.5px;white-space:nowrap}
.nav a:hover{background:var(--red)}
.nav a.on{background:var(--red)}

/* 横幅 */
.banner{position:relative;height:390px;overflow:hidden;background:#eaeef4}
.banner .slide{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;animation:slidefade 12s infinite}
.banner .slide:nth-child(2){animation-delay:6s}
@keyframes slidefade{0%,45%{opacity:1}55%,100%{opacity:0}}
.banner .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(13,59,102,.86));
  color:#fff;padding:38px 0 22px}
.banner .cap h1{font-size:30px;font-weight:700;letter-spacing:1px}
.banner .cap p{margin-top:8px;font-size:16px;color:#dfe9f5}

/* 三大保障 */
.assure{background:var(--bg);padding:26px 0;border-bottom:1px solid var(--line)}
.assure .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.assure .item{display:flex;gap:14px;align-items:flex-start;background:#fff;padding:18px;border-radius:6px;
  border:1px solid var(--line)}
.assure img{width:46px;height:46px;object-fit:contain;flex:0 0 46px}
.assure h3{font-size:16px;margin-bottom:4px;color:var(--blue)}
.assure p{font-size:13.5px;color:var(--gray);line-height:1.6}

/* 通用区块 */
section{padding:44px 0}
section.alt{background:var(--bg)}
.ttl{text-align:center;margin-bottom:26px}
.ttl h2{font-size:24px;color:var(--blue);letter-spacing:1px}
.ttl p{font-size:13px;color:#98a4b3;text-transform:uppercase;letter-spacing:2px;margin-top:4px}
.ttl::after{content:"";display:block;width:52px;height:3px;background:var(--red);margin:12px auto 0}

/* 经营项目 */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cat{background:#fff;border:1px solid var(--line);border-radius:6px;padding:18px;
  transition:.2s;border-top:3px solid var(--blue)}
.cat:hover{box-shadow:0 6px 18px rgba(13,59,102,.12);transform:translateY(-2px)}
.cat h3{font-size:16px;color:var(--blue);margin-bottom:8px}
.cat ul{list-style:none}
.cat li{font-size:13px;color:var(--gray);padding:3px 0;border-bottom:1px dashed #eef1f5}
.cat li:last-child{border:0}

/* 产品/案例网格 */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.2s}
.card:hover{box-shadow:0 8px 20px rgba(0,0,0,.10)}
.card .ph{height:190px;background:#f0f3f7;display:flex;align-items:center;justify-content:center;overflow:hidden}
.card .ph img{width:100%;height:100%;object-fit:cover}
.card .tx{padding:12px 14px}
.card .tx h3{font-size:15px;font-weight:600;color:#1b1b1b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .tx p{font-size:13px;color:var(--gray);margin-top:4px}

/* 关于我们 */
.about{display:grid;grid-template-columns:1.15fr 1fr;gap:34px;align-items:center}
.about h2{font-size:24px;color:var(--blue);margin-bottom:14px}
.about p{font-size:14.5px;color:#3b4653;margin-bottom:12px}
.about ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;margin-top:6px}
.about li{font-size:14px;color:#33445a}
.about li::before{content:"▪";color:var(--red);margin-right:6px}
.about .pic img{border-radius:6px;box-shadow:0 8px 26px rgba(13,59,102,.14)}

/* 联系条 */
.contact{background:var(--blue);color:#fff;padding:34px 0}
.contact .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.contact h2{font-size:22px;margin-bottom:6px}
.contact p{color:#c7d8ec;font-size:14px}
.contact .btn{background:var(--red);color:#fff;padding:14px 34px;border-radius:4px;font-size:17px;font-weight:700}

/* 页脚 */
.footer{background:#0a2b4b;color:#a9bcd0;font-size:13.5px;padding:30px 0 22px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
.footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.footer li{list-style:none;padding:3px 0}
.footer .qr{display:flex;gap:14px;align-items:center}
.footer .qr img{width:96px;height:96px;background:#fff;padding:4px;border-radius:4px}
.footer .copy{border-top:1px solid #1b4266;margin-top:22px;padding-top:14px;text-align:center;color:#7f97ae}

/* ── 首页图片拼贴（banner 版块） ───────────────── */
.mosaic{background:#0d3b66;padding:8px 0 0}
.mosaic .mgrid{display:grid;grid-template-columns:1.15fr 1fr 1fr;grid-template-rows:212px 212px;gap:8px}
.mosaic .t{position:relative;display:block;overflow:hidden;background-color:#e9eef5;
  background-size:cover;background-position:center;transition:.25s}
.mosaic .t.big{grid-row:1/3}
.mosaic .t.wide{grid-column:2/4}
.mosaic .t:hover{filter:brightness(1.07)}
.mosaic .t span{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;color:#fff;
  font-size:14.5px;font-weight:600;letter-spacing:.5px;
  background:linear-gradient(transparent,rgba(8,31,56,.80))}
.mosaic .cap{background:#0d3b66;color:#fff;padding:18px 0 20px}
.mosaic .cap h1{font-size:27px;letter-spacing:1px}
.mosaic .cap p{margin-top:7px;font-size:15px;color:#d3e2f2}

/* ── 展示厅（图片墙） ──────────────────────────── */
.ttl.withmore{position:relative}
.ttl.withmore .more{position:absolute;right:0;top:14px;font-size:13.5px;color:var(--blue2)}
.hall{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.hall a{display:block;background:#fff;border:1px solid var(--line);border-radius:6px;
  overflow:hidden;transition:.2s}
.hall a:hover{box-shadow:0 8px 20px rgba(0,0,0,.10);transform:translateY(-2px)}
.hall img{display:block;width:100%;aspect-ratio:1/1;object-fit:cover}
.hall b{display:block;padding:9px 10px;font-size:13.5px;font-weight:500;color:#22303f;
  text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hall a:hover b{color:var(--blue)}

/* 常见问题（FAQ，GEO 友好） */
.faq{display:grid;gap:12px}
.faq .qa{background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue2);
  border-radius:0 6px 6px 0;padding:14px 18px}
.faq .qa h3{font-size:15.5px;color:var(--blue);margin-bottom:6px}
.faq .qa p{font-size:14.5px;color:#3b4653}

/* 手机端 */
@media (max-width:820px){
  .mosaic .mgrid{grid-template-columns:1fr 1fr;grid-template-rows:150px 150px 150px}
  .mosaic .t.big{grid-row:1/3}
  .mosaic .t.wide{grid-column:1/3;grid-row:3/4}
  .mosaic .cap h1{font-size:20px}
  .mosaic .cap p{font-size:13px}
  .header .wrap{flex-direction:column;gap:10px;align-items:flex-start}
  .banner{height:220px}
  .banner .cap h1{font-size:20px}
  .banner .cap p{font-size:13px}
  .assure .wrap,.cats,.grid,.hall,.about,.footer .cols{grid-template-columns:1fr 1fr}
  .about{grid-template-columns:1fr}
  .contact .wrap{justify-content:center;text-align:center}
}
@media (max-width:520px){
  .cats,.grid,.assure .wrap,.footer .cols{grid-template-columns:1fr}
  .hall{grid-template-columns:1fr 1fr}
  .nav a{padding:11px 14px;font-size:14px}
  .tel{display:none}
}