:root{
  --bg:#ffffff;
  --bg-soft:#f5f8ff;
  --ink:#0f1b33;
  --muted:#5a6a86;
  --line:#e2e9f5;
  --brand:#2563eb;
  --brand-2:#06b6d4;
  --radius:16px;
  --shadow:0 14px 40px rgba(15,27,51,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600}
.brand-mark{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:#fff;font-size:15px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.nav-links{display:flex;gap:22px;margin-left:12px;color:var(--muted);font-size:15px}
.nav-links a:hover{color:var(--ink)}
.nav-actions{margin-left:auto;display:flex;gap:10px}
@media (max-width:900px){.nav-links{display:none}}

.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:9px 18px;
  font-size:15px;border:1px solid var(--line);background:#fff;transition:.18s}
.btn:hover{border-color:#c9d7ee}
.btn-primary{background:linear-gradient(135deg,var(--brand),#3b82f6);color:#fff;border-color:transparent;font-weight:600}
.btn-primary:hover{filter:brightness(1.05)}
.btn-ghost{color:var(--ink)}
.btn-lg{padding:13px 26px;font-size:16px;border-radius:12px}

.hero{background:
  radial-gradient(900px 420px at 12% -10%,rgba(37,99,235,.13),transparent 60%),
  radial-gradient(700px 380px at 100% 0%,rgba(6,182,212,.13),transparent 55%),var(--bg);
  padding:76px 0 64px}
.eyebrow{color:var(--brand);font-weight:600;letter-spacing:.08em;font-size:14px;margin:0 0 14px}
.hero h1{margin:0 0 18px;font-size:44px;line-height:1.25;letter-spacing:-.5px}
.hero h1 span{background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
@media (max-width:720px){.hero h1{font-size:32px}}
.lead{max-width:760px;color:var(--muted);font-size:17px;margin:0 0 26px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hint{color:var(--muted);font-size:14px;margin:14px 0 0}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:40px}
@media (max-width:720px){.hero-stats{grid-template-columns:1fr}}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:22px}
.stat span{color:var(--muted);font-size:14px}

.section{padding:72px 0}
.section.alt{background:var(--bg-soft)}
.section h2{margin:0 0 10px;font-size:30px;letter-spacing:-.3px}
.section-lead{color:var(--muted);max-width:780px;margin:0 0 34px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
@media (max-width:900px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card-icon{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;margin-bottom:14px;font-size:17px;
  background:rgba(37,99,235,.10);color:var(--brand);border:1px solid rgba(37,99,235,.18)}
.card h3{margin:0 0 8px;font-size:18px}
.card p{color:var(--muted);font-size:15px;margin:0}
.price{font-size:24px;font-weight:600;color:var(--ink);margin:6px 0 10px}

.platform-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
@media (max-width:720px){.platform-grid{grid-template-columns:1fr}}
.platform{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;
  flex-direction:column;gap:6px}
.platform b{font-size:18px}
.platform span{color:var(--muted);font-size:14px}
.platform.muted{background:transparent;border-style:dashed}

.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;counter-reset:step}
@media (max-width:900px){.flow{grid-template-columns:1fr 1fr}}
.flow li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;position:relative}
.flow li::before{counter-increment:step;content:counter(step);position:absolute;top:-12px;left:18px;width:24px;height:24px;
  border-radius:50%;background:var(--brand);color:#fff;font-size:13px;display:grid;place-items:center}
.flow b{display:block;margin:8px 0 4px}
.flow span{color:var(--muted);font-size:14px}

.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:760px}
@media (max-width:720px){.compare{grid-template-columns:1fr}}
.compare-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.compare-item .label{color:var(--muted);font-size:14px}
.compare-item b{display:block;font-size:28px;margin:6px 0 12px}
.bar{height:8px;border-radius:999px;background:#eaf0fb;overflow:hidden}
.bar > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.note{color:var(--muted);font-size:13px;margin-top:16px}

.faq{display:flex;flex-direction:column;gap:12px;max-width:840px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
summary{cursor:pointer;font-weight:500}
details p{color:var(--muted);margin:10px 0 0;font-size:15px}

.cta{background:linear-gradient(135deg,#0f2a6b,#0e7490);color:#fff;padding:70px 0;text-align:center}
.cta h2{margin:0 0 10px;font-size:30px;color:#fff}
.cta p{color:rgba(255,255,255,.85);margin:0 0 26px}
.cta .btn-primary{background:#fff;color:#0f2a6b}

.footer{border-top:1px solid var(--line);padding:36px 0;background:#fff}
.footer-inner{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start;justify-content:space-between}
.footer b{display:block;margin-bottom:4px}
.footer p{margin:0;color:var(--muted);font-size:14px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:14px}
.footer-links a:hover{color:var(--ink)}
.copyright{width:100%;color:var(--muted);font-size:13px}

/* ---------- 参照成熟 SaaS 落地页的设计增强 ---------- */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
@media (max-width:960px){.hero-grid{grid-template-columns:1fr;gap:34px}}
.hero-copy h1{margin:0 0 18px}
.trust{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;margin:16px 0 0}
.trust .tick{display:grid;place-items:center;width:18px;height:18px;border-radius:50%;
  background:rgba(5,150,105,.14);color:#059669;font-size:12px}

.hero-visual{display:flex;justify-content:flex-end}
.mock{width:100%;max-width:430px;background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:22px;box-shadow:0 24px 60px rgba(15,27,51,.12)}
.mock-head{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin-bottom:16px}
.mock-dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.15)}
.mock-row{display:flex;justify-content:space-between;font-size:14px;margin:12px 0 6px}
.mock-row b{font-weight:600}
.pct{font-variant-numeric:tabular-nums}
.pct-good{color:#059669}
.pct-warn{color:#d97706}
.bar.warn > i{background:linear-gradient(90deg,#f59e0b,#fbbf24)}
.mock-list{list-style:none;margin:16px 0 0;padding:14px 0 0;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:9px}
.mock-list li{display:flex;justify-content:space-between;font-size:13.5px;color:var(--muted)}
.mock-list em{font-style:normal}
.mock-list .miss{color:#dc2626}
.mock-list .ok{color:#059669}
.mock-foot{margin:14px 0 0;font-size:12px;color:var(--muted)}

.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1040px){.cards-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.cards-4{grid-template-columns:1fr}}
.card-link{display:inline-block;margin-top:12px;font-size:13.5px;color:var(--brand);word-break:break-all}
.card-link:hover{text-decoration:underline}

.float-cta{
  position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:30;
  writing-mode:vertical-rl;letter-spacing:.18em;padding:18px 10px;
  background:linear-gradient(180deg,#f97316,#fb923c);color:#fff;
  font-size:13px;font-weight:600;border-radius:12px 0 0 12px;
  box-shadow:0 12px 30px rgba(249,115,22,.28);
}
.float-cta:hover{filter:brightness(1.05)}
@media (max-width:720px){.float-cta{display:none}}

/* ---------- 案例、行业、权益与联系 ---------- */
.case{display:flex;flex-direction:column}
.case-tag{align-self:flex-start;font-size:12px;color:var(--brand);background:rgba(37,99,235,.10);
  border:1px solid rgba(37,99,235,.18);border-radius:999px;padding:3px 10px;margin-bottom:12px}
.case h3{margin:0 0 10px}
.case-action{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);color:var(--ink);font-size:14px}

.industry-tags{display:flex;flex-wrap:wrap;gap:10px}
.industry-tags span{background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 15px;font-size:14.5px;color:var(--ink)}

.benefit-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:26px}
@media (max-width:900px){.benefit-grid{grid-template-columns:1fr}}
.benefit{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.benefit h3{margin:0 0 12px}
.benefit ul,.benefit ol{margin:0;padding-left:20px;color:var(--muted);font-size:15px;line-height:1.9}
.benefit li{margin-bottom:2px}

.contact{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.contact h2{margin:0 0 8px}
.contact .section-lead{margin:0;max-width:620px}
.contact-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 祥云品牌标识 ---------- */
.brand-logo{width:40px;height:40px;border-radius:11px;object-fit:cover;flex:0 0 40px}
.brand-text{font-weight:600}
.contact-logo{width:150px;height:150px;border-radius:18px;object-fit:cover;flex:0 0 150px}
@media (max-width:720px){.contact-logo{width:110px;height:110px;flex-basis:110px}}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand img{border-radius:9px;object-fit:cover;flex:0 0 34px}
.cta{
  background-image:linear-gradient(135deg,rgba(10,28,72,.92),rgba(8,66,88,.88)),url('/brand/cta-bg.jpg');
  background-size:cover;background-position:center;
}