:root{
  --bg:#f7f8fb; --card:#ffffff; --ink:#111827; --sub:#6b7280;
  --brand:#4f46e5; --brand2:#7c3aed; --line:#e5e7eb;
  --grad:linear-gradient(135deg,#4f46e5,#7c3aed 55%,#a855f7);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
img{display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:20px;display:flex;align-items:center;gap:8px}
.logo .dot{width:30px;height:30px;display:block;border-radius:9px;box-shadow:0 3px 10px rgba(79,70,229,.35)}
.logo:hover .dot{transform:scale(1.05)}
.logo .dot{transition:.2s}
.nav .links{display:flex;gap:24px;font-size:14px;color:var(--sub)}
.nav .links a:hover{color:var(--brand)}
.nav .cta{background:var(--grad);color:#fff;padding:9px 18px;border-radius:10px;font-size:14px;font-weight:600;border:none;cursor:pointer}

/* hero */
.hero{padding:72px 0 56px;text-align:center;background:
 radial-gradient(600px 300px at 20% 0%,rgba(79,70,229,.08),transparent),
 radial-gradient(600px 300px at 80% 0%,rgba(168,85,247,.10),transparent)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:#eef2ff;color:var(--brand);font-size:13px;font-weight:600;border:1px solid #e0e7ff}
.hero h1{font-size:44px;line-height:1.25;margin:20px 0 14px;font-weight:800;letter-spacing:-1px}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--sub);font-size:17px;max-width:660px;margin:0 auto}
.hero .btns{margin-top:28px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{padding:13px 26px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;border:none;display:inline-block}
.btn.pri{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(79,70,229,.25)}
.btn.sec{background:#fff;border:1px solid var(--line);color:var(--ink)}
.stats{margin-top:44px;display:flex;justify-content:center;flex-wrap:wrap}
.stat{padding:0 34px;border-right:1px solid var(--line)}
.stat:last-child{border:none}
.stat b{display:block;font-size:24px;font-weight:800}
.stat span{font-size:13px;color:var(--sub)}

/* filter + grid */
.sec-title{margin:48px 0 8px;font-size:24px;font-weight:800;text-align:center}
.sec-sub{text-align:center;color:var(--sub);font-size:14px;margin-bottom:24px}
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:28px}
.tab{padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;cursor:pointer;color:var(--sub)}
.tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:22px;padding-bottom:64px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(17,24,39,.10);border-color:#d7d9e2}
.cover{height:170px;position:relative;display:grid;place-items:center;color:#fff;overflow:hidden}
.cover .ico{font-size:44px;filter:drop-shadow(0 4px 10px rgba(0,0,0,.25));z-index:1}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.82}
.cover .tag{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.94);color:#111827;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;z-index:2}
.play{position:absolute;right:12px;bottom:12px;background:rgba(0,0,0,.5);border-radius:999px;padding:4px 12px;font-size:12px;color:#fff;z-index:2}
.body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.body h3{font-size:17px;font-weight:700}
.body h3 a:hover{color:var(--brand)}
.body .desc{font-size:13.5px;color:var(--sub)}
.kpis{display:flex;gap:8px;margin-top:2px;flex-wrap:wrap}
.kpi{font-size:12px;background:#f3f4f6;border-radius:8px;padding:4px 9px;color:#374151;font-weight:600}
.more{margin-top:auto;padding-top:12px;font-size:14px;color:var(--brand);font-weight:700;display:flex;align-items:center;gap:5px}
.card:hover .more{gap:9px}

/* strip */
.strip{background:#0f1222;color:#fff;border-radius:20px;padding:44px 40px;margin-bottom:64px}
.strip h2{font-size:24px;font-weight:800;margin-bottom:8px}
.strip>p{color:#9ca3af;font-size:14px;margin-bottom:26px}
.strip .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px}
.col .n{font-size:13px;color:#a5b4fc;font-weight:700;margin-bottom:6px}
.col b{font-size:16px}
.col p{margin:6px 0 0;font-size:13px;color:#9ca3af}

/* detail page */
.crumb{padding:18px 0 4px;font-size:13px;color:var(--sub)}
.crumb a:hover{color:var(--brand)}
.detail{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;margin:14px 0 28px}
.d-hero{height:280px;position:relative;display:grid;place-items:center;color:#fff;overflow:hidden}
.d-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.8}
.d-hero .ico{font-size:72px;filter:drop-shadow(0 6px 16px rgba(0,0,0,.3));z-index:1}
.d-hero h1{position:absolute;left:0;right:0;bottom:0;padding:20px 32px;font-size:30px;font-weight:800;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.65));z-index:2}
.d-body{padding:32px}
.d-body h2{font-size:20px;margin:26px 0 10px;padding-left:12px;border-left:4px solid var(--brand)}
.d-body h2:first-child{margin-top:0}
.d-body p,.d-body li{font-size:15px;color:#374151}
.d-body ul{padding-left:20px}
.d-body li{margin:6px 0}
.kpis-lg{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0}
.kpis-lg .kpi{font-size:14px;padding:8px 16px;border-radius:10px;background:#eef2ff;color:#3730a3}
.cases{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:14px 0}
.case{border:1px solid var(--line);border-radius:14px;overflow:hidden}
.case .thumb{height:130px;display:grid;place-items:center;color:#fff;position:relative;font-size:34px}
.case .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.75}
.case .thumb::after{content:"▶ 客户案例视频";position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.5);color:#fff;font-size:11px;padding:4px 10px;border-radius:999px}
.case .cap{padding:12px 14px;font-size:13.5px;color:var(--sub)}
.case .cap b{color:var(--ink)}
.deploy-box{background:#eef2ff;border:1px solid #e0e7ff;border-radius:14px;padding:16px 18px;margin-top:16px;font-size:14px;color:#3730a3}
.cta-bar{margin-top:26px;display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:linear-gradient(135deg,#eef2ff,#faf5ff);border:1px solid #e0e7ff;border-radius:16px;padding:20px 22px}
.cta-bar .t b{font-size:16px}
.cta-bar .t span{display:block;font-size:13px;color:var(--sub)}
.related{margin:36px 0 64px}
.related h2{font-size:20px;margin-bottom:16px}

/* seo article */
.seo-block{background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;margin-bottom:28px}
.seo-block h2{font-size:20px;margin:22px 0 10px}
.seo-block h3{font-size:16px;margin:16px 0 8px}
.seo-block p,.seo-block li{font-size:14.5px;color:#374151}
.seo-block ul{padding-left:20px}

/* modal */
.mask{position:fixed;inset:0;background:rgba(15,18,34,.55);backdrop-filter:blur(4px);z-index:100;display:none;align-items:flex-start;justify-content:center;overflow-y:auto;padding:40px 16px}
.mask.open{display:flex}
.modal{background:#fff;border-radius:20px;max-width:420px;width:100%;padding:30px;position:relative;animation:up .25s ease;text-align:center}
@keyframes up{from{transform:translateY(18px);opacity:0}to{transform:none;opacity:1}}
.x{position:absolute;top:16px;right:18px;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:16px;cursor:pointer;color:var(--sub)}
.modal h2{font-size:20px}
.modal .sub{font-size:13px;color:var(--sub)}
.qr{width:190px;height:190px;margin:18px auto;border-radius:16px;border:2px dashed #c7cbe0;display:grid;place-items:center;color:#98a0b8;font-size:13px;background:repeating-linear-gradient(45deg,#f8f9ff 0 10px,#fff 10px 20px)}
.id{display:inline-flex;align-items:center;gap:10px;background:#f3f4f6;border-radius:12px;padding:10px 16px;font-weight:700;margin:8px 0 14px}
.id button{border:none;background:var(--ink);color:#fff;border-radius:8px;padding:5px 12px;font-size:12px;cursor:pointer}
.tip{font-size:13px;color:var(--sub)}
.picked{margin-top:14px;font-size:13px;color:var(--brand);font-weight:600}
footer{border-top:1px solid var(--line);padding:28px 0 40px;text-align:center;color:var(--sub);font-size:13px}
footer .fl{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
footer .fl a:hover{color:var(--brand)}
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:#fff;padding:10px 20px;border-radius:12px;font-size:14px;opacity:0;transition:.3s;z-index:200}
.toast.show{transform:translateX(-50%);opacity:1}

@media(max-width:640px){
 .hero h1{font-size:30px}.nav .links{display:none}.cases{grid-template-columns:1fr}
 .stats{gap:14px}.stat{padding:0 16px;border:none}
 .d-hero h1{font-size:22px;padding:14px 20px}.d-body{padding:22px}
}