/* ============================================================
   云度量 YunMetric — Design System
   Cloud-native observability SaaS (red-team lookalike)
   ============================================================ */

:root{
  --primary:#0a6cff;
  --primary-dark:#0850d4;
  --primary-soft:#e8f0ff;
  --accent:#00c2a8;
  --accent-soft:#e6fbf6;
  --navy:#0a1a3f;
  --navy-2:#13234d;
  --bg:#ffffff;
  --bg-soft:#f5f8ff;
  --bg-mute:#eef3fb;
  --text:#1a2b4a;
  --text-soft:#5a6b8a;
  --text-faint:#8593ad;
  --border:#e3e9f5;
  --shadow-sm:0 1px 3px rgba(16,42,99,.06), 0 1px 2px rgba(16,42,99,.04);
  --shadow:0 10px 30px rgba(16,42,99,.08);
  --shadow-lg:0 24px 60px rgba(10,26,63,.14);
  --radius:14px;
  --radius-sm:10px;
  --radius-lg:22px;
  --maxw:1200px;
  --ease:cubic-bezier(.4,0,.2,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
ul{list-style:none}
section{position:relative}

/* ---------- layout ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.section-tight{padding:48px 0}
.section-soft{background:var(--bg-soft)}
.section-navy{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);color:#dfe7f7}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--primary);background:var(--primary-soft);
  padding:7px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow-accent{color:var(--accent);background:var(--accent-soft)}
.section-head{max-width:720px;margin:0 auto 56px;text-align:center}
.section-head.left{margin-left:0;text-align:left}
.section-title{font-size:clamp(28px,3.4vw,40px);font-weight:800;letter-spacing:-.01em;line-height:1.25}
.section-sub{margin-top:16px;font-size:18px;color:var(--text-soft);line-height:1.7}
.section-navy .section-title{color:#fff}
.section-navy .section-sub{color:#b9c6e6}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:inherit;font-size:15px;font-weight:600;
  padding:12px 24px;border-radius:10px;border:1px solid transparent;
  cursor:pointer;transition:all .2s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(10,108,255,.28)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 24px rgba(10,108,255,.36)}
.btn-accent{background:var(--accent);color:#04312b;box-shadow:0 6px 18px rgba(0,194,168,.28)}
.btn-accent:hover{transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border-color:var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.btn-ghost{background:transparent;color:var(--text);padding:10px 16px}
.btn-ghost:hover{color:var(--primary)}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-lg{padding:15px 30px;font-size:16px;border-radius:12px}
.btn-block{display:flex;width:100%}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.01em}
.nav-logo-text{display:flex;flex-direction:column;line-height:1.05}
.nav-logo-text .en{font-size:12px;font-weight:600;color:var(--text-faint);letter-spacing:.06em;text-transform:uppercase}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:15px;color:var(--text-soft);font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:8px}
.nav-toggle{display:none;width:42px;height:42px;border:none;background:transparent;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;border-radius:8px}
.nav-toggle span{height:2px;width:22px;background:var(--text);border-radius:2px;transition:.2s}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 80% -10%,#e8f1ff 0,transparent 60%),linear-gradient(180deg,#f7faff 0,#fff 100%);padding:88px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:8px 14px 8px 8px;border-radius:999px;font-size:13px;color:var(--text-soft);margin-bottom:24px}
.hero-tag .dot{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px}
.hero h1{font-size:clamp(34px,4.6vw,54px);font-weight:800;line-height:1.18;letter-spacing:-.02em}
.hero h1 .grad{background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{margin-top:22px;font-size:19px;color:var(--text-soft);max-width:540px;line-height:1.7}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-trust{display:flex;align-items:center;gap:20px;margin-top:30px;flex-wrap:wrap}
.hero-trust .t{font-size:13px;color:var(--text-faint)}
.hero-trust .stars{color:#ffb020;letter-spacing:2px}
.hero-mock{position:relative}
.hero-mock .float{position:absolute;border-radius:14px;background:#fff;box-shadow:var(--shadow-lg);padding:14px 18px;font-size:13px}
.hero-mock .float-1{top:-18px;left:-22px}
.hero-mock .float-2{bottom:-16px;right:-18px}
.mini-metric{display:flex;align-items:center;gap:10px}
.mini-metric .v{font-weight:800;font-size:20px;color:var(--text)}
.mini-metric .d{font-size:12px;font-weight:700}
.mini-metric .d.up{color:var(--accent)}
.mini-metric .d.down{color:#ff5a6a}

/* ---------- cards / grid ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cfe0ff}
.card-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.card-icon.b1{background:linear-gradient(135deg,#e8f0ff,#dce8ff);color:var(--primary)}
.card-icon.b2{background:linear-gradient(135deg,#e6fbf6,#d3f6ee);color:var(--accent)}
.card-icon.b3{background:linear-gradient(135deg,#fff3e6,#ffe9d4);color:#f59e0b}
.card-icon.b4{background:linear-gradient(135deg,#f3e9ff,#e9d9ff);color:#7c5cff}
.card-icon.b5{background:linear-gradient(135deg,#ffe9ee,#ffd9e2);color:#ff5a6a}
.card-icon.b6{background:linear-gradient(135deg,#e9f7ff,#d4efff);color:#0ea5e9}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.card p{color:var(--text-soft);font-size:15px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--primary)}

/* feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.reverse .split-media{order:2}
.feature-list{margin-top:26px;display:grid;gap:18px}
.feature-item{display:flex;gap:14px;align-items:flex-start}
.feature-item .ic{flex:0 0 40px;width:40px;height:40px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700}
.feature-item h4{font-size:16px;font-weight:700;margin-bottom:3px}
.feature-item p{color:var(--text-soft);font-size:14.5px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .num{font-size:clamp(32px,4vw,46px);font-weight:800;letter-spacing:-.02em;background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .label{margin-top:8px;color:var(--text-soft);font-size:15px}
.section-navy .stat .num{background:linear-gradient(120deg,#fff,#9fe9da);-webkit-background-clip:text;background-clip:text;color:transparent}

/* logos strip */
.logos{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:18px 38px;margin-top:40px}
.logos .lg{font-weight:700;color:var(--text-faint);font-size:18px;opacity:.85;letter-spacing:.02em}
.logos .lg span{display:block;font-size:11px;font-weight:500;color:#aab6cf;margin-top:2px;letter-spacing:.04em}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:34px 30px;display:flex;flex-direction:column;box-shadow:var(--shadow-sm)}
.price-card.featured{border:2px solid var(--primary);box-shadow:var(--shadow-lg);position:relative}
.price-card .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(120deg,var(--primary),var(--accent));color:#fff;font-size:12px;font-weight:700;padding:6px 16px;border-radius:999px}
.price-card .name{font-size:18px;font-weight:700}
.price-card .desc{color:var(--text-soft);font-size:14px;margin-top:6px;min-height:40px}
.price-card .price{margin:18px 0 8px;display:flex;align-items:baseline;gap:4px}
.price-card .price .cur{font-size:18px;font-weight:600;color:var(--text-soft)}
.price-card .price .amt{font-size:42px;font-weight:800;letter-spacing:-.02em}
.price-card .price .per{font-size:14px;color:var(--text-faint)}
.price-card .price .free{font-size:32px;font-weight:800}
.price-card ul{margin:20px 0 26px;display:grid;gap:12px;flex:1}
.price-card li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text)}
.price-card li .ck{color:var(--accent);font-weight:800;flex:0 0 18px}
.price-card li.muted{color:var(--text-faint)}
.price-card li.muted .ck{color:#c7d0e3}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;counter-reset:st}
.step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);position:relative}
.step .n{counter-increment:st;width:44px;height:44px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:16px}
.step .n::before{content:counter(st)}
.step h4{font-size:18px;font-weight:700;margin-bottom:8px}
.step p{color:var(--text-soft);font-size:15px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--primary) 0%,#0090d6 55%,var(--accent) 100%);color:#fff;border-radius:var(--radius-lg);padding:56px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.cta-band h3{font-size:30px;font-weight:800;letter-spacing:-.01em}
.cta-band p{margin-top:10px;opacity:.92;font-size:17px}
.cta-band .btn-light{color:var(--primary)}
.cta-band .actions{display:flex;gap:14px;flex-wrap:wrap}

/* table */
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.tbl th,.tbl td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:14.5px}
.tbl th{background:var(--bg-soft);font-weight:700;color:var(--text);font-size:13px;letter-spacing:.02em}
.tbl tr:last-child td{border-bottom:none}
.tbl td .yes{color:var(--accent);font-weight:800}
.tbl td .no{color:#c7d0e3}

/* page hero (inner pages) */
.page-hero{background:radial-gradient(900px 400px at 85% -30%,#e8f1ff 0,transparent 60%),linear-gradient(180deg,#f7faff,#fff);padding:72px 0 56px}
.page-hero h1{font-size:clamp(30px,3.8vw,44px);font-weight:800;letter-spacing:-.02em}
.page-hero p{margin-top:16px;font-size:19px;color:var(--text-soft);max-width:620px}
.breadcrumb{font-size:13px;color:var(--text-faint);margin-bottom:18px}
.breadcrumb a:hover{color:var(--primary)}

/* tabs / pills */
.pills{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:40px}
.pill{padding:9px 18px;border-radius:999px;border:1px solid var(--border);font-size:14px;font-weight:600;color:var(--text-soft);background:#fff;cursor:pointer;transition:.2s}
.pill:hover{border-color:var(--primary);color:var(--primary)}
.pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* testimonial */
.quote{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm)}
.quote p{font-size:16px;color:var(--text);line-height:1.75}
.quote .who{display:flex;align-items:center;gap:12px;margin-top:18px}
.quote .who .av{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.quote .who .nm{font-weight:700;font-size:15px}
.quote .who .rl{font-size:13px;color:var(--text-faint)}

/* FAQ */
.faq{display:grid;gap:14px;max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:0}
.faq summary{padding:18px 22px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--primary);transition:.2s}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 22px 20px;color:var(--text-soft);font-size:15px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field input,.field textarea,.field select{width:100%;font-family:inherit;font-size:15px;color:var(--text);padding:13px 15px;border:1px solid var(--border);border-radius:10px;background:#fff;transition:.2s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.info-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);margin-bottom:18px}
.info-card h4{font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:8px}
.info-card p{color:var(--text-soft);font-size:14.5px}
.info-card .ic{width:38px;height:38px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center}

/* timeline (about) */
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--border)}
.tl-item{position:relative;padding-bottom:34px}
.tl-item::before{content:"";position:absolute;left:-30px;top:4px;width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.tl-item .yr{font-weight:800;color:var(--primary);font-size:15px}
.tl-item h4{font-size:17px;font-weight:700;margin:4px 0 6px}
.tl-item p{color:var(--text-soft);font-size:14.5px;max-width:560px}

/* values / culture chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.chip{background:#fff;border:1px solid var(--border);padding:10px 16px;border-radius:999px;font-size:14px;font-weight:600;color:var(--text-soft)}
.chip.solid{background:var(--primary-soft);border-color:transparent;color:var(--primary)}

/* ---------- footer ---------- */
.footer{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#b9c6e6;padding:64px 0 0}
.footer-inner{display:grid;grid-template-columns:1.3fr 2fr;gap:48px}
.footer-brand .nav-logo{color:#fff;margin-bottom:16px}
.footer-desc{font-size:14.5px;max-width:300px;line-height:1.7;color:#9fb0d4}
.footer-social{display:flex;gap:12px;margin-top:18px}
.footer-social a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;transition:.2s}
.footer-social a:hover{background:var(--primary);transform:translateY(-2px)}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:#9fb0d4;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.1);padding:22px 0}
.footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:#7d8db0}
.footer-legal{display:flex;gap:18px;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr;gap:40px}
  .split.reverse .split-media{order:0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:32px}
  .price-grid{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .footer-inner{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:36px;flex-direction:column;text-align:center;align-items:center}
}
@media(max-width:760px){
  .section{padding:64px 0}
  .nav-links{
    position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;gap:0;padding:10px 24px 18px;border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);transform:translateY(-130%);transition:transform .25s var(--ease);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 4px;border-top:1px solid var(--border)}
  .nav-actions .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .grid-2,.grid-3,.steps{grid-template-columns:1fr}
  .hero-mock .float{display:none}
  .section-head{margin-bottom:36px}
}
@media(max-width:480px){
  .grid-4{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .footer-cols{grid-template-columns:1fr 1fr}
}