:root{
  --brand:#2f5cff;--brand2:#7a5cff;
  --ink:#182033;--ink2:#5b6577;--ink3:#8b94a7;
  --line:#e8ecf3;--bg:#f6f8fc;--card:#fff;
  --r:16px;--shadow:0 6px 24px rgba(24,32,51,.08);--shadow-sm:0 2px 10px rgba(24,32,51,.05);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* ===== 导航 ===== */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:11px;min-width:0}
.logo-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;flex:none;box-shadow:0 4px 14px rgba(47,92,255,.28)}
.logo-text{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.logo-text b{font-size:16.5px;letter-spacing:.5px;color:var(--ink);transition:.25s}
.logo-text small{display:block;font-size:10.5px;color:var(--ink3);font-weight:400;letter-spacing:3px;white-space:nowrap}
.logo:hover .logo-text b{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.menu{display:flex;gap:28px;font-size:14.5px;color:var(--ink2)}
.menu a{transition:.2s}
.menu a:hover{color:var(--brand)}
.menu a.on{color:var(--brand);font-weight:600}
.nav-cta{background:var(--brand);color:#fff;padding:8px 18px;border-radius:999px;font-size:13.5px;transition:.2s;white-space:nowrap}
.nav-cta:hover{filter:brightness(1.08)}

/* ===== 导航右侧操作区 ===== */
.nav-actions{display:flex;align-items:center;gap:20px}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#ffffff 0%,#f3f7ff 100%)}
.orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.45;pointer-events:none}
.orb1{width:520px;height:520px;background:#c9d9ff;top:-180px;left:-140px}
.orb2{width:460px;height:460px;background:#e6d8ff;bottom:-200px;right:-120px}
.hero-inner{position:relative;text-align:center;padding:96px 24px 72px}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #d7e1ff;color:var(--brand);font-size:13px;letter-spacing:.5px;padding:7px 18px;border-radius:999px}
.hero h1{font-size:44px;line-height:1.25;margin:24px 0 16px}
.hero h1 .grad{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{max-width:700px;margin:0 auto;color:var(--ink2);font-size:17px;letter-spacing:.2px}
.hero-btns{display:flex;gap:16px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 30px;border-radius:12px;font-size:15px;transition:.2s}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(47,92,255,.28)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:#fff;border:1px solid #d7e1ff;color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.stats{display:flex;justify-content:center;flex-wrap:wrap;margin-top:52px}
.stat{padding:6px 36px;border-right:1px solid #e3eaf6;text-align:center}
.stat:last-child{border-right:none}
.stat-ico{display:block;font-style:normal;font-size:30px;margin-bottom:10px;filter:drop-shadow(0 6px 12px rgba(47,92,255,.18))}
.stat b{display:block;font-size:20px;letter-spacing:.5px;color:var(--ink)}
.stat span{font-size:12.5px;color:var(--ink3)}

/* ===== 通用区块 ===== */
.section{padding:76px 0 8px}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:30px;letter-spacing:.5px}
.sec-head p{color:var(--ink2);margin:10px auto 0;font-size:15px;max-width:680px;line-height:1.8}

/* ===== 平台能力 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:.25s}
.cap:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.cap .ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.ico.c1{background:#eaf0ff}.ico.c2{background:#f0eaff}.ico.c3{background:#e6f7f1}
.ico.c4{background:#fff3e6}.ico.c5{background:#ffeef0}.ico.c6{background:#e8f6ff}
.ico.c7{background:#fff4dd}.ico.c8{background:#dff5f2}
.cap h3{font-size:17.5px;margin-bottom:8px}
.cap p{font-size:14px;color:var(--ink2)}

/* 智能数据开发 · 重点大卡（占2格，与7张能力卡正好铺满3x3） */
.cap.wide{grid-column:span 2;background:linear-gradient(135deg,#f5f8ff 0%,#fdfbff 100%);border:1px solid #c9d8ff;position:relative}
.cap.wide:hover{box-shadow:0 10px 30px rgba(47,92,255,.14)}
.cap.wide p{max-width:640px}
.cap-flag{position:absolute;top:22px;right:22px;font-size:12px;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2));padding:4px 14px;border-radius:999px;letter-spacing:.5px}
.cap-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.cap-chips i{font-style:normal;font-size:12px;color:var(--brand);background:rgba(47,92,255,.07);border:1px solid rgba(47,92,255,.18);padding:3px 12px;border-radius:999px}

/* ===== 开发链路 ===== */
.pipe{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.pipe::before{content:"";position:absolute;top:43px;left:6%;right:6%;height:2px;border-radius:2px;background:linear-gradient(90deg,#b9ccff,#d9ccff);opacity:.55}
.step{position:relative;z-index:1;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 14px 18px;text-align:center;transition:.2s}
.step:hover{border-color:#c9d8ff;box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.step:not(:last-child)::after{content:"→";position:absolute;top:36px;right:-15px;font-size:13px;color:var(--brand);z-index:2}
.s-ico{position:relative;width:44px;height:44px;border-radius:13px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:21px;box-shadow:0 0 0 6px #fff}
.s-ico .num{position:absolute;top:-9px;right:-9px;width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:11px;font-style:normal;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(47,92,255,.35)}
.s-ico.i1{background:#eaf0ff}.s-ico.i2{background:#f0eaff}.s-ico.i3{background:#e6f7f1}
.s-ico.i4{background:#e8f6ff}.s-ico.i5{background:#ffeef0}.s-ico.i6{background:#fff4dd}
.step b{font-size:15px;display:block}
.s-stage{display:inline-block;font-size:11px;color:var(--brand);background:rgba(47,92,255,.06);border:1px solid rgba(47,92,255,.16);padding:1px 11px;border-radius:999px;margin:7px 0 9px}
.step p{font-size:12.5px;color:var(--ink2);line-height:1.65}
.pipe-strip{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:30px}
.pipe-strip span{font-size:13px;color:var(--ink2);background:#fff;border:1px solid var(--line);padding:8px 20px;border-radius:999px;transition:.2s}
.pipe-strip span:hover{border-color:#c9d8ff;color:var(--brand);transform:translateY(-2px)}

/* ===== 案例卡片 ===== */
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
.tab{padding:8px 20px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;color:var(--ink2);cursor:pointer;transition:.2s}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab.on{background:var(--brand);border-color:var(--brand);color:#fff}
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;cursor:pointer;transition:.25s;display:flex;flex-direction:column;animation:fadeUp .45s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c9d8ff}
/* 整卡超链接盖层：覆盖卡片，原生 a 跳转（供采集/搜索引擎发现子页面） */
.case-link{position:absolute;inset:0;z-index:1;border-radius:var(--r)}
.case-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.case .ico{width:48px;height:48px;border-radius:13px;background:#eef2ff;display:flex;align-items:center;justify-content:center;font-size:22px}
.pill{font-size:12px;color:var(--brand);background:rgba(47,92,255,.08);padding:3px 12px;border-radius:999px}
.case h3{font-size:16.5px;margin-bottom:8px}
.case p{font-size:13.5px;color:var(--ink2);flex:1;min-height:44px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0 14px}
.tags i{font-style:normal;font-size:11.5px;color:var(--ink3);background:var(--bg);border:1px solid var(--line);padding:2px 9px;border-radius:6px}
.case-foot{display:flex;align-items:center;justify-content:space-between;gap:10px}
.case-foot a{position:relative;z-index:2}
.case-foot a:hover{text-decoration:underline}
.more{font-size:13px;color:var(--brand);font-weight:600}
.case:hover .more{transform:translateX(3px)}
.open{font-size:11.5px;color:var(--ink3);font-family:ui-monospace,Consolas,monospace;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:60%}
.empty{text-align:center;color:var(--ink3);padding:40px 0;grid-column:1/-1}

/* ===== 案例页（cases.html） ===== */
.more-wrap{display:flex;justify-content:center;margin-top:36px}
.page-head{position:relative;overflow:hidden;background:linear-gradient(180deg,#ffffff 0%,#f2f6ff 100%);border-bottom:1px solid var(--line);text-align:center;padding:64px 0 52px}
.page-head .container{position:relative}
.page-head h1{font-size:36px;margin:20px 0 12px;letter-spacing:.5px}
.page-head p{color:var(--ink2);max-width:620px;margin:0 auto;font-size:15px}
.cases-page{padding-top:44px}
/* ===== 响应式 ===== */
@media(max-width:920px){
  .menu{display:none}
  .grid-3,.cases{grid-template-columns:repeat(2,1fr)}
  .grid-3 .cap:last-child{grid-column:1/-1}
  .pipe{grid-template-columns:repeat(3,1fr)}
  .pipe::before,.step::after{display:none}
  .hero-inner{padding:76px 20px 60px}
  .hero h1{font-size:40px}
  .stat{padding:12px 24px}
  .stat-ico{font-size:24px}
  .page-head h1{font-size:30px}
}
@media(max-width:600px){
  .grid-3,.cases,.pipe{grid-template-columns:1fr}
  .cap.wide,.grid-3 .cap:last-child{grid-column:auto}
  .hero h1{font-size:30px}
  .stats{flex-direction:column;gap:8px}
  .stat{border:none;padding:6px 0}
  .page-head h1{font-size:26px}
  .logo-text small{display:none}
  .logo-text b{font-size:15px}
}
/* ===== CTA & 页脚 ===== */
.cta{margin:72px 0;background:linear-gradient(120deg,var(--brand),var(--brand2));border-radius:24px;color:#fff;text-align:center;padding:60px 24px}
.cta h2{font-size:28px;margin-bottom:10px}
.cta p{opacity:.88;margin-bottom:28px;font-size:15px}
.cta .btn{background:#fff;color:var(--brand);font-weight:600}
.footer{border-top:1px solid var(--line);padding:30px 0;color:var(--ink3);font-size:13px;text-align:center;background:#fff}
.footer b{color:var(--ink2)}
.footer .flinks{margin-top:8px}
.footer .flinks span{margin:0 8px;opacity:.5}
.footer .icp{margin-top:6px}
.footer a{color:var(--ink3);transition:.2s}
.footer a:hover{color:var(--brand)}

/* ===== 趣味彩蛋 ===== */
.logo-mark{cursor:pointer}
.logo-mark.spin{animation:eggSpin .7s cubic-bezier(.3,1.6,.5,1)}
@keyframes eggSpin{40%{transform:rotate(200deg) scale(1.18)}100%{transform:rotate(360deg) scale(1)}}
.stat-ico{cursor:pointer}
.stat-ico.dance{animation:eggDance .7s ease}
@keyframes eggDance{20%{transform:rotate(-14deg) scale(1.25)}45%{transform:rotate(12deg) scale(1.25)}70%{transform:rotate(-8deg) scale(1.1)}}
.spark{position:fixed;pointer-events:none;z-index:998;font-size:15px;color:#7a5cff;text-shadow:0 0 8px rgba(122,92,255,.5);animation:sparkUp .85s ease-out forwards}
@keyframes sparkUp{to{transform:translateY(-52px) scale(.3);opacity:0}}
.confetti{position:fixed;top:-36px;z-index:998;pointer-events:none;animation:confFall linear forwards}
@keyframes confFall{to{transform:translateY(112vh) rotate(560deg)}}

/* ===== 首屏流星 ===== */
.hero-inner{z-index:1}
.meteor{position:absolute;width:3px;height:3px;border-radius:50%;background:#fff;box-shadow:0 0 6px #fff;pointer-events:none;transform:rotate(147deg)}
.meteor::after{content:"";position:absolute;top:1px;right:2px;width:110px;height:1.5px;background:linear-gradient(270deg,rgba(255,255,255,.85),transparent)}
.meteor.fly{animation:meteorFly 1.1s ease-out forwards}
@keyframes meteorFly{to{transform:rotate(147deg) translateX(300px);opacity:0}}

/* ===== 降级：减少动效 ===== */
@media(prefers-reduced-motion:reduce){
  .spark,.confetti,.meteor{display:none}
  .logo-mark.spin,.stat-ico.dance{animation:none}
}