:root{
  --primary:#1F4E79;--primary-dark:#16365a;--accent:#2E86C1;--bg:#f4f6f9;
  --card:#ffffff;--text:#333333;--muted:#7f8c9a;--border:#e3e8ef;--soft:#eef3ff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);background:var(--bg);line-height:1.75}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
/* 顶栏 */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 1px 8px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{font-size:20px;font-weight:800;color:var(--primary-dark)}
.logo span{color:var(--accent)}
.nav{display:flex;gap:20px;flex-wrap:wrap}
.nav a{color:var(--text);font-size:14px}
.nav a:hover{color:var(--primary)}
/* 主视觉 */
.hero{background:linear-gradient(135deg,#1F4E79 0%,#2E86C1 100%);color:#fff;text-align:center;padding:72px 20px 64px}
.hero h1{font-size:40px;font-weight:800;letter-spacing:1px}
.hero .slogan{font-size:18px;margin-top:14px;opacity:.92}
.hero .btns{margin-top:30px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.stats{display:flex;justify-content:center;gap:48px;margin-top:40px;flex-wrap:wrap}
.stats .num{font-size:30px;font-weight:800}
.stats .lbl{font-size:13px;opacity:.85}
/* 按钮 */
.btn{display:inline-block;padding:13px 32px;border-radius:8px;font-size:16px;font-weight:600;transition:.2s}
.btn-primary{background:#fff;color:var(--primary-dark)!important}
.btn-primary:hover{background:#eaf1ff}
.btn-accent{background:var(--accent);color:#fff!important}
.btn-accent:hover{background:#1F4E79}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.6);color:#fff!important}
/* 区块 */
.section{padding:56px 0}
.section-title{font-size:28px;font-weight:800;margin-bottom:8px;color:var(--text)}
.section-title .bar{display:inline-block;width:6px;height:26px;background:var(--primary);border-radius:3px;margin-right:10px;vertical-align:-4px}
.section-sub{color:var(--muted);margin-bottom:28px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(31,78,121,.14);border-color:#2E86C1}
.card img{width:100%;height:150px;object-fit:cover;background:#f0f3f8}
.card-body{padding:16px}
.card h3{font-size:16px;margin-bottom:8px}
.card p{font-size:13px;color:var(--muted)}
.card .more{display:inline-block;margin-top:12px;font-size:13px;font-weight:600}
/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--muted);padding:20px 0 4px}
.breadcrumb a{color:var(--muted)}
/* 子页 hero */
.hero-sub{background:linear-gradient(135deg,#1F4E79,#2E86C1);color:#fff;border-radius:14px;padding:44px 36px;margin:24px 0}
.hero-sub h1{font-size:30px;font-weight:800}
.hero-sub .lead{margin-top:12px;font-size:15px;opacity:.95;max-width:820px}
.download-cta{margin-top:26px;display:flex;gap:16px;flex-wrap:wrap}
.hero-sub .muted{color:rgba(255,255,255,.8);margin-top:16px;font-size:13px}
/* 面板 */
.panel{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:30px;margin:18px 0}
.panel h2{font-size:22px;font-weight:800;margin-bottom:18px;padding-left:12px;border-left:4px solid var(--primary)}
.check-list{list-style:none}
.check-list li{padding:7px 0 7px 28px;position:relative}
.check-list li::before{content:"✔";position:absolute;left:0;color:var(--primary);font-weight:700}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.shots figure{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#fafbfd}
.shots img{width:100%;object-fit:cover}
.shots figcaption{padding:10px;font-size:13px;color:var(--muted);text-align:center}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.related a{display:block;padding:12px 16px;background:var(--soft);border-radius:8px;font-size:14px}
/* 下载框 */
.dl-box{background:var(--soft);border:1px solid #bcd4ec;border-radius:10px;padding:22px}
.dl-box .row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:10px 0}
/* FAQ */
.faq-item{margin-bottom:16px}
.faq-item h3{font-size:16px;font-weight:700;margin-bottom:6px}
.faq-item p{color:var(--muted)}
/* 页脚 */
.site-footer{background:#16365a;color:#c7d3e8;text-align:center;padding:40px 20px;margin-top:40px;font-size:14px}
.site-footer p{margin:6px 0}
/* 截图放大 */
.shots img{cursor:zoom-in}
.lightbox{display:none;position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:1000;align-items:center;justify-content:center}
.lightbox.show{display:flex}
.lightbox-img{max-width:92vw;max-height:92vh;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:18px;right:30px;font-size:44px;line-height:1;color:#fff;cursor:pointer;user-select:none}
@media(max-width:720px){.shots{grid-template-columns:1fr}.hero h1{font-size:30px}.nav{gap:12px}}
/* 下载中心列表 */
.dl-list{display:flex;flex-direction:column;gap:12px}
.dl-item{display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px 20px;flex-wrap:wrap}
.dl-item h3{font-size:16px;margin:0}
.dl-links{display:flex;gap:10px;flex-wrap:wrap}
.dl-links .btn{padding:9px 20px;font-size:14px}
/* 案例卡片 */
.case-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;margin:16px 0}
.case-card h3{font-size:18px;font-weight:800;margin-bottom:10px;color:var(--primary-dark)}
.case-card .tag{display:inline-block;background:var(--soft);color:var(--primary);border-radius:20px;padding:2px 12px;font-size:12px;margin:0 8px 8px 0}
.case-card ul{margin:10px 0 0 20px}
.case-card li{margin:4px 0;font-size:14px}
/* 关于/联系 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.contact-item{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px}
.contact-item .k{font-size:13px;color:var(--muted);margin-bottom:6px}
.contact-item .v{font-size:16px;font-weight:700;color:var(--primary-dark)}
.timeline{list-style:none;position:relative;padding-left:24px}
.timeline::before{content:"";position:absolute;left:8px;top:4px;bottom:4px;width:2px;background:var(--border)}
.timeline li{position:relative;padding:0 0 22px 16px}
.timeline li::before{content:"";position:absolute;left:-22px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent)}
.timeline .year{font-weight:800;color:var(--primary-dark)}
/* 案例详情 */
.case-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.case-meta .tag{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.35)}
.article-body{font-size:15px}
.article-body p{margin:14px 0;color:#3a4653}
.article-body h2{font-size:21px;font-weight:800;margin:28px 0 12px;padding-left:12px;border-left:4px solid var(--primary);color:var(--primary-dark)}
.article-body ul{margin:0 0 8px 22px}
.article-body li{margin:6px 0}
.article-body .hl{color:var(--primary);font-weight:700}
.case-nav{display:flex;justify-content:space-between;gap:12px;margin:24px 0;flex-wrap:wrap}
.case-nav a{display:inline-block;padding:10px 18px;background:var(--soft);border-radius:8px;font-size:14px}
.case-nav a:hover{background:#dbe7ff}
.case-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px;margin:8px 0}
.case-list .case-card{margin:0;display:flex;flex-direction:column}
.case-list .case-card p{font-size:14px;color:var(--muted);margin:8px 0}
.case-list .case-card .more{display:inline-block;margin-top:auto;padding-top:12px;font-size:14px;font-weight:600}
/* 案例封面（目录卡片） */
.case-list .case-cover{display:block;width:100%;height:170px;object-fit:cover;border-radius:8px;background:#f0f3f8;margin-bottom:14px}
.case-list .case-card{overflow:hidden}
/* 案例详情配图 */
.case-gallery{margin:20px 0}
.case-figure{text-align:center;margin:22px 0;border:1px solid var(--border);border-radius:10px;padding:14px;background:#fafbfd}
.case-figure img{max-width:100%;height:auto;margin:0 auto;border-radius:6px;cursor:zoom-in}
.case-figure figcaption{margin-top:10px;font-size:13px;color:var(--muted)}
.case-gallery-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.case-gallery-grid{grid-template-columns:1fr}}
/* 图片放大灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);display:none;align-items:center;justify-content:center;z-index:9999;cursor:zoom-out}
.lightbox.show{display:flex}
.lightbox img{max-width:92vw;max-height:92vh;object-fit:contain;border-radius:4px;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:16px;right:28px;font-size:44px;color:#fff;cursor:pointer;line-height:1}
.lightbox-close:hover{color:#ff6b6b}