/* ===== EdgeMemory 官网 · 设计系统 ===== */
:root{
  --bg:#0b1020;
  --bg-soft:#0f172a;
  --panel:#ffffff;
  --panel-2:#f7f9fc;
  --ink:#0f172a;
  --ink-2:#334155;
  --ink-3:#64748b;
  --line:#e2e8f0;
  --line-2:#cbd5e1;
  --brand:#0ea5b7;        /* EdgeMemory teal */
  --brand-2:#2563eb;      /* EdgeMesh blue */
  --brand-3:#7c3aed;      /* EdgeHippo violet */
  --accent:#06b6d4;
  --good:#16a34a;
  --warn:#d97706;
  --bad:#dc2626;
  --chip:#eef6f8;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px rgba(15,23,42,.14);
  --radius:16px;
  --maxw:1180px;
  --nav-h:64px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--panel-2);line-height:1.65;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .4em;font-weight:700;letter-spacing:.2px}
h2{font-size:clamp(22px,3vw,30px)}
h3{font-size:18px}
p{margin:0 0 1em}
.muted{color:var(--ink-3)}
.small{font-size:13px}
.center{text-align:center}

/* ===== Top Nav ===== */
.topbar{position:sticky;top:0;z-index:50;height:var(--nav-h);display:flex;align-items:center;gap:18px;
  padding:0 22px;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.3px}
.brand .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 4px 12px rgba(14,165,183,.4)}
.brand small{display:block;font-weight:500;font-size:11px;color:var(--ink-3);letter-spacing:1px}
.navlinks{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.navlinks a{padding:8px 12px;border-radius:10px;color:var(--ink-2);font-size:14px;font-weight:600;transition:.15s}
.navlinks a:hover{background:var(--chip);color:var(--brand-2)}
.nav-cta{padding:8px 16px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:700;font-size:14px;box-shadow:0 6px 16px rgba(37,99,235,.3)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;color:#e8f4f7;background:
  radial-gradient(1100px 500px at 78% -10%,rgba(124,58,237,.30),transparent 60%),
  radial-gradient(900px 460px at 10% 20%,rgba(14,165,183,.32),transparent 55%),
  linear-gradient(160deg,#070b18,#0d1426 55%,#0a1130);
  padding:84px 22px 72px}
.hero-inner{max-width:var(--maxw);margin:0 auto}
.hero .kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:2px;color:#9fe6f0;text-transform:uppercase;font-weight:700;border:1px solid rgba(159,230,240,.35);padding:6px 14px;border-radius:999px}
.hero h1{font-size:clamp(32px,5.4vw,58px);margin:.35em 0 .25em;letter-spacing:.5px;color:#fff}
.hero h1 .grad{background:linear-gradient(90deg,#5eead4,#60a5fa,#c4b5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(16px,2vw,20px);color:#c7d6e6;max-width:760px}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.badge{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);padding:12px 16px;border-radius:14px;backdrop-filter:blur(4px)}
.badge b{font-size:15px}
.badge span{font-size:12px;color:#a9bdd2;display:block}
.badge .ic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-weight:800;color:#fff}
.ic-h{background:linear-gradient(135deg,#7c3aed,#a855f7)}
.ic-m{background:linear-gradient(135deg,#2563eb,#0ea5b7)}
.ic-e{background:linear-gradient(135deg,#0ea5b7,#22d3ee)}
.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{padding:13px 22px;border-radius:12px;font-weight:700;font-size:15px;transition:.18s;display:inline-block}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 10px 26px rgba(14,165,183,.4)}
.btn-ghost{border:1px solid rgba(255,255,255,.3);color:#e8f4f7}
.btn:hover{transform:translateY(-2px)}

/* floating metrics */
.hero-stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:42px}
.hero-stats .s{border-left:2px solid rgba(94,234,212,.5);padding-left:14px}
.hero-stats .s b{display:block;font-size:26px;color:#fff}
.hero-stats .s span{font-size:12px;color:#9fb3c8;letter-spacing:.5px}

/* ===== Layout ===== */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:64px 0;border-bottom:1px solid var(--line)}
.section-head{margin-bottom:30px}
.section-head .eyebrow{font-size:13px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--brand)}
.section-head h2{margin-top:6px}
.section-head p{color:var(--ink-3);max-width:780px}

/* card grid */
.grid{display:grid;gap:18px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.card h3{display:flex;align-items:center;gap:10px}
.card .tag{font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--chip);color:var(--brand-2)}
.card .num{font-size:30px;font-weight:800;color:var(--brand-2);line-height:1.1}
.card .num small{font-size:14px;color:var(--ink-3);font-weight:600}
.kv{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px dashed var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv b{color:var(--ink)}

/* tables */
.table{width:100%;border-collapse:collapse;background:var(--panel);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:14px}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.table thead th{background:var(--bg-soft);color:#e8f4f7;font-weight:700;font-size:13px;letter-spacing:.3px}
.table tbody tr:hover{background:var(--panel-2)}
.table tbody tr:last-child td{border-bottom:0}
.table .mono{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-size:13px;color:var(--brand-2)}

/* status pill */
.pill{display:inline-block;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;white-space:nowrap}
.p-good{background:#dcfce7;color:#15803d}
.p-warn{background:#fef3c7;color:#b45309}
.p-bad{background:#fee2e2;color:#b91c1c}
.p-info{background:#dbeafe;color:#1d4ed8}
.p-mute{background:#e2e8f0;color:#475569}

/* progress bars */
.bar{height:9px;border-radius:999px;background:var(--line);overflow:hidden}
.bar>span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.bar-row{display:flex;align-items:center;gap:12px;margin:10px 0}
.bar-row .lab{width:150px;font-size:13px;color:var(--ink-2);flex:none}
.bar-row .val{width:54px;text-align:right;font-weight:700;font-size:13px;flex:none}

/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tab{padding:9px 16px;border-radius:10px;border:1px solid var(--line);background:var(--panel);font-weight:700;font-size:14px;cursor:pointer;color:var(--ink-2)}
.tab.active{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
.tabpane{display:none}
.tabpane.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* device showcase */
.device{position:relative;background:linear-gradient(180deg,#0d1426,#0a1020);color:#e8f4f7;border-radius:var(--radius);padding:24px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.device .form{position:absolute;top:18px;right:18px;font-size:12px;font-weight:800;letter-spacing:1px;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.1)}
.device h3{color:#fff}
.device .price{font-size:26px;font-weight:800;color:#5eead4;margin:6px 0}
.device ul{list-style:none;padding:0;margin:14px 0 0}
.device li{padding:6px 0;border-top:1px solid rgba(255,255,255,.08);font-size:14px;color:#b9c8da;display:flex;gap:8px}
.device li b{color:#e8f4f7}

/* timeline */
.timeline{position:relative;margin-left:8px;padding-left:26px;border-left:2px solid var(--line)}
.tl-item{position:relative;padding:0 0 26px}
.tl-item::before{content:"";position:absolute;left:-34px;top:4px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--brand-2)}
.tl-item.done::before{background:var(--good);border-color:var(--good)}
.tl-item .when{font-size:12px;font-weight:800;color:var(--brand-2);letter-spacing:1px}
.tl-item h4{margin:4px 0 2px;font-size:16px}
.tl-item p{margin:0;color:var(--ink-3);font-size:14px}

/* callout */
.callout{border-left:4px solid var(--brand);background:var(--chip);padding:16px 18px;border-radius:0 12px 12px 0;margin:18px 0;font-size:14px}
.callout.warn{border-color:var(--warn);background:#fffbeb}
.callout.bad{border-color:var(--bad);background:#fef2f2}
.callout.good{border-color:var(--good);background:#f0fdf4}

/* architecture svg wrap */
.diagram{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);overflow-x:auto}
.diagram svg{width:100%;height:auto;min-width:680px}

/* doc map */
.docgroup{margin-bottom:18px}
.docgroup h4{font-size:15px;margin-bottom:8px;color:var(--brand-2)}
.docgroup a{display:inline-block;margin:0 8px 8px 0;padding:7px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:13px;box-shadow:var(--shadow)}
.docgroup a:hover{border-color:var(--brand);color:var(--brand-2)}

footer{background:var(--bg-soft);color:#aebfd2;padding:42px 22px;font-size:13px}
.foot-inner{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer a{color:#9fe6f0}
footer h4{color:#fff;margin:0 0 8px;font-size:14px}

/* responsive */
@media(max-width:980px){
  .cols-3,.cols-4{grid-template-columns:repeat(2,1fr)}
  .cols-2{grid-template-columns:1fr}
}
@media(max-width:760px){
  .navlinks{display:none}
  .menu-btn{display:block}
  .navlinks.open{display:flex;position:absolute;top:var(--nav-h);left:0;right:0;flex-direction:column;background:#fff;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .cols-3,.cols-4{grid-template-columns:1fr}
  .bar-row .lab{width:110px}
}
.top-pad{padding-top:90px}
#toTop{position:fixed;right:20px;bottom:22px;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border:0;font-size:20px;cursor:pointer;box-shadow:var(--shadow-lg);display:none;z-index:60}