/* AIOpsChina — 机器人帮运维 · landing styles */
:root{
  --bg:#0b1020; --bg2:#0e1530; --ink:#0f172a; --ink-soft:#475569;
  --paper:#ffffff; --paper-2:#f6f8fc; --line:#e6eaf2;
  --brand:#38bdf8; --brand2:#6366f1; --green:#34d399; --amber:#f59e0b;
  --grad:linear-gradient(135deg,#38bdf8 0%,#6366f1 55%,#a855f7 100%);
  --shadow:0 10px 30px -12px rgba(15,23,42,.18);
  --shadow-lg:0 30px 60px -20px rgba(15,23,42,.28);
  --r:16px; --r-sm:10px;
  --maxw:1140px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.skip{position:absolute;left:-9999px;top:0;background:#fff;color:#000;padding:8px 12px;z-index:200}
.skip:focus{left:8px;top:8px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:13px 24px;font-weight:600;font-size:15px;cursor:pointer;transition:.18s ease;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 24px -10px rgba(99,102,241,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 30px -12px rgba(99,102,241,.7)}
.btn-ghost{background:rgba(255,255,255,.08);color:inherit;border-color:rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-block{width:100%;margin-top:6px}

/* nav */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.82);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.01em}
.brand-mark{display:grid;place-items:center;border-radius:10px;overflow:hidden}
.brand-text{color:var(--ink)}
.brand-accent{color:var(--brand2)}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14.5px;color:var(--ink-soft);font-weight:500}
.nav-links a{transition:.15s;padding:6px 0}
.nav-links a:hover{color:var(--brand2)}
.cta-top{margin-left:0}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;margin-left:auto;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.nav-toggle span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{position:relative;color:#fff;background:radial-gradient(1200px 600px at 80% -10%,rgba(99,102,241,.35),transparent),radial-gradient(900px 500px at 10% 10%,rgba(56,189,248,.28),transparent),linear-gradient(180deg,#0b1020,#0e1530);overflow:hidden;padding:88px 0 96px}
.aurora{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.aurora i{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;animation:float 14s ease-in-out infinite}
.aurora i:nth-child(1){width:380px;height:380px;left:-60px;top:-40px;background:#38bdf8}
.aurora i:nth-child(2){width:420px;height:420px;right:-80px;top:60px;background:#a855f7;animation-delay:-4s}
.aurora i:nth-child(3){width:300px;height:300px;left:40%;bottom:-80px;background:#34d399;animation-delay:-8s;opacity:.35}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(20px,-24px)}}
.hero-inner{position:relative;z-index:1;max-width:880px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;letter-spacing:.04em;color:#bcd0ff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);padding:7px 14px;border-radius:999px;margin:0 0 22px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 0 rgba(52,211,153,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(52,211,153,.55)}70%{box-shadow:0 0 0 10px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
.hero-title{font-size:clamp(40px,7vw,72px);line-height:1.05;margin:0 0 22px;font-weight:800;letter-spacing:-.02em}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(16px,2.2vw,20px);color:#c7d2fe;max-width:680px;margin:0 0 30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-cta .btn-ghost{color:#fff}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:46px 0 0;max-width:680px}
.hero-stats dt{font-size:26px;font-weight:800;color:#fff}
.hero-stats dd{margin:0;color:#9fb3ff;font-size:13.5px}

/* sections */
.section{padding:84px 0}
.section-alt{background:var(--paper-2)}
.section-head{max-width:720px;margin:0 auto 46px;text-align:center}
.kicker{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand2);font-weight:700;margin:0 0 10px}
.section-head h2{font-size:clamp(26px,4vw,40px);margin:0 0 14px;font-weight:800;letter-spacing:-.01em}
.section-head .lead{color:var(--ink-soft);font-size:17px;margin:0}

/* grids */
.grid{display:grid;gap:18px}
.pain-grid{grid-template-columns:repeat(3,1fr)}
.bot-grid{grid-template-columns:repeat(3,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d6deee}
.pain .pico{font-size:26px;display:block;margin-bottom:10px}
.pain h3{font-size:18px;margin:0 0 8px}
.pain p{color:var(--ink-soft);font-size:14.5px;margin:0}

/* bots */
.bot-ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:24px;margin-bottom:14px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;box-shadow:0 10px 20px -8px var(--c2)}
.bot h3{font-size:18px;margin:0 0 8px}
.bot p{color:var(--ink-soft);font-size:14.5px;margin:0 0 12px}
.bot ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}
.bot li{font-size:13.5px;color:#334155;padding-left:18px;position:relative}
.bot li::before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:800}

/* flow */
.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.flow li{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;position:relative;box-shadow:var(--shadow)}
.flow-no{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:800;color:var(--brand2);background:#eef2ff;border-radius:999px;padding:4px 10px;display:inline-block;margin-bottom:12px}
.flow h3{font-size:17px;margin:0 0 8px}
.flow p{color:var(--ink-soft);font-size:14px;margin:0}

/* scope chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:38px}
.chips span{background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:9px 18px;font-size:14px;color:#334155;font-weight:500;box-shadow:var(--shadow)}
.scope-map{max-width:760px;margin:0 auto;text-align:center}
.map-title{font-weight:700;color:var(--ink-soft);font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px}
.map-bar{display:flex;gap:8px;margin-bottom:14px}
.map-bar span{flex:1;height:10px;border-radius:6px;background:linear-gradient(90deg,var(--brand),var(--brand2));opacity:.35;animation:grow 1.4s ease-out both}
.map-bar span:nth-child(2){animation-delay:.15s;opacity:.5}
.map-bar span:nth-child(3){animation-delay:.3s;opacity:.65}
.map-bar span:nth-child(4){animation-delay:.45s;opacity:.85}
@keyframes grow{from{transform:scaleX(0);transform-origin:left}to{transform:scaleX(1)}}
.map-note{color:var(--ink-soft);font-size:14.5px;margin:0}

/* faq */
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm);padding:0;box-shadow:var(--shadow);overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--brand2);transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 22px 20px;color:var(--ink-soft);font-size:14.5px}

/* contact */
.section-cta{background:radial-gradient(900px 500px at 90% 10%,rgba(99,102,241,.12),transparent),var(--paper-2)}
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-lead .kicker{margin-bottom:10px}
.contact-lead h2{font-size:clamp(26px,4vw,38px);margin:0 0 14px;font-weight:800;letter-spacing:-.01em}
.contact-lead .lead{color:var(--ink-soft);font-size:16px;margin:0 0 22px}
.contact-bullets{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;color:#334155;font-size:15px}
.contact-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:14px}
.contact-form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.contact-form label{display:flex;flex-direction:column;gap:6px;font-size:13.5px;font-weight:600;color:#334155}
.req{color:#ef4444}
.contact-form input,.contact-form textarea,.contact-form select{font:inherit;font-size:15px;padding:11px 13px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--ink);transition:.15s;width:100%}
.contact-form input:focus,.contact-form textarea:focus,.contact-form select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(56,189,248,.18)}
.contact-form textarea{resize:vertical;min-height:96px}
.form-note{margin:0;font-size:14px;min-height:18px;color:var(--green);font-weight:600}
.form-note.err{color:#ef4444}
.form-mini{font-size:12px;color:var(--ink-soft);margin:0}

/* footer */
.footer{background:#0b1020;color:#9fb3ff;padding:46px 0 30px}
.footer-inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.footer-brand .brand-text{color:#fff;font-size:18px;font-weight:800}
.footer-brand p{margin:6px 0 0;font-size:13.5px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}
.footer-links a:hover{color:#fff}
.footer-copy{flex-basis:100%;font-size:12.5px;color:#6b7db5;margin:10px 0 0;border-top:1px solid rgba(255,255,255,.08);padding-top:18px}

/* toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:13px 22px;border-radius:999px;font-size:14.5px;font-weight:600;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:300}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:.6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:980px){
  .bot-grid,.pain-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .contact-inner{grid-template-columns:1fr;gap:30px}
}
@media (max-width:680px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:14px 24px;gap:14px;box-shadow:var(--shadow-lg)}
  .cta-top{display:none}
  .section{padding:60px 0}
  .hero{padding:60px 0 70px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:14px}
  .bot-grid,.pain-grid,.flow{grid-template-columns:1fr}
  .contact-form .row{grid-template-columns:1fr}
  .map-bar{flex-wrap:wrap}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}