/* ===========================================================
   聚合支付 · 门户网站主题样式
   现代 SaaS 风格，蓝色主色调
   =========================================================== */

:root {
  --primary: #2b6cff;
  --primary-dark: #1a4ed8;
  --primary-light: #5b8cff;
  --primary-50: #eef3ff;
  --primary-100: #dce7ff;
  --ink-900: #0c1733;
  --ink-700: #2a3554;
  --ink-500: #5a6685;
  --ink-400: #8a93ac;
  --line: #e7ecf5;
  --bg: #ffffff;
  --bg-soft: #f5f8ff;
  --bg-dark: #0d1430;
  --bg-dark-2: #111a3b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 6px 20px rgba(22, 52, 120, 0.06);
  --shadow-md: 0 16px 40px rgba(22, 52, 120, 0.10);
  --shadow-lg: 0 30px 70px rgba(22, 52, 120, 0.16);
  --maxw: 1200px;
  --gradient: linear-gradient(135deg, #2b6cff 0%, #4d8bff 60%, #6aa1ff 100%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  color: var(--ink-700);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 10px 24px rgba(43,108,255,.35); }
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 14px 30px rgba(43,108,255,.45); }
.btn-ghost { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.45); }
.btn-ghost:hover { background: rgba(255,255,255,.24); }
.btn-light { background: #fff; color: var(--primary); box-shadow: var(--shadow-sm); }
.btn-light:hover { box-shadow: var(--shadow-md); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary-100); }
.btn-outline:hover { border-color: var(--primary); }
.btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 36px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: .5px;
}
.brand .logo-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: grid; place-items: center;
  color: #fff; font-size: 18px; font-weight: 900;
  box-shadow: 0 8px 18px rgba(43,108,255,.35);
}
.nav-menu { display: flex; gap: 30px; margin-left: 8px; }
.nav-menu a {
  font-size: 15px; font-weight: 500; color: var(--ink-700);
  position: relative; padding: 6px 0;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--primary); }
.nav-menu a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.nav-actions .login { font-weight: 600; color: var(--ink-700); }
.nav-actions .login:hover { color: var(--primary); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink-700); margin: 5px 0; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: radial-gradient(1200px 500px at 80% -10%, #4d8bff 0%, transparent 60%),
              linear-gradient(135deg, #1f5cf0 0%, #2b6cff 50%, #4f8bff 100%);
  color: #fff;
  overflow: hidden;
  padding: 70px 0 120px;
}
.hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -1px; height: 70px;
  background: var(--bg);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0% 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 40px;
  align-items: center;
  position: relative; z-index: 2;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.3);
  padding: 6px 14px; border-radius: 999px;
  font-size: 13px; margin-bottom: 22px;
}
.hero h1 {
  font-size: 46px; line-height: 1.18; margin: 0 0 18px;
  font-weight: 800; letter-spacing: .5px;
}
.hero h1 .hl { color: #ffe27a; }
.hero p.lead { font-size: 18px; color: rgba(255,255,255,.92); margin: 0 0 28px; max-width: 540px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats .num { font-size: 28px; font-weight: 800; }
.hero-stats .lbl { font-size: 13px; color: rgba(255,255,255,.8); }

/* hero mock dashboard */
.hero-visual { position: relative; }
.mock-card {
  background: #fff; border-radius: 18px; box-shadow: var(--shadow-lg);
  padding: 18px; color: var(--ink-700);
}
.mock-top { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.mock-dot { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.mock-dot.y { background: #febc2e; } .mock-dot.g { background: #28c840; }
.mock-title { margin-left: auto; font-size: 12px; color: var(--ink-400); }
.mock-kpis { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-bottom: 14px; }
.mock-kpi { background: var(--bg-soft); border-radius: 12px; padding: 12px; }
.mock-kpi .k { font-size: 12px; color: var(--ink-400); }
.mock-kpi .v { font-size: 18px; font-weight: 800; color: var(--ink-900); }
.mock-chart { height: 130px; border-radius: 12px; background: var(--bg-soft); padding: 12px; display: flex; align-items: flex-end; gap: 8px; }
.mock-bar { flex: 1; border-radius: 6px 6px 0 0; background: var(--gradient); }
.float-chip {
  position: absolute; background: #fff; border-radius: 12px; box-shadow: var(--shadow-md);
  padding: 10px 14px; display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; color: var(--ink-700);
}
.float-chip .ic { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: var(--gradient); }
.float-chip.a { top: -22px; left: -26px; }
.float-chip.b { bottom: -20px; right: -18px; }

/* ---------- Quick channels strip ---------- */
.channel-strip { margin-top: -50px; position: relative; z-index: 5; }
.channel-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-md);
  display: grid; grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.channel-item { display: flex; align-items: center; gap: 14px; padding: 22px 24px; border-right: 1px solid var(--line); }
.channel-item:last-child { border-right: 0; }
.channel-item .ic { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-50); color: var(--primary); display: grid; place-items: center; }
.channel-item .t { font-weight: 700; color: var(--ink-900); }
.channel-item .d { font-size: 13px; color: var(--ink-400); }

/* ---------- Section ---------- */
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
  color: var(--primary); background: var(--primary-50);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 16px;
}
.section-head h2 { font-size: 34px; margin: 0 0 14px; color: var(--ink-900); font-weight: 800; }
.section-head p { font-size: 16px; color: var(--ink-500); margin: 0; }

/* ---------- Feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card .ic {
  width: 56px; height: 56px; border-radius: 14px; margin-bottom: 18px;
  background: var(--primary-50); color: var(--primary); display: grid; place-items: center;
}
.feature-card h3 { font-size: 19px; margin: 0 0 10px; color: var(--ink-900); }
.feature-card p { font-size: 14.5px; color: var(--ink-500); margin: 0; }

/* ---------- Split feature rows ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split + .split { margin-top: 80px; }
.split.reverse .split-media { order: 2; }
.split-media {
  background: linear-gradient(135deg, #eef3ff, #dbe7ff);
  border-radius: 20px; padding: 36px; box-shadow: var(--shadow-sm);
  position: relative; min-height: 320px;
  display: grid; place-items: center;
}
.split-text h3 { font-size: 28px; margin: 0 0 16px; color: var(--ink-900); font-weight: 800; }
.split-text p { font-size: 16px; color: var(--ink-500); margin: 0 0 22px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; font-size: 15px; color: var(--ink-700); }
.check-list .tick {
  flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--primary-50); color: var(--primary);
  display: grid; place-items: center; font-size: 12px; font-weight: 900; margin-top: 2px;
}

/* ---------- Dark network section ---------- */
.network {
  background: radial-gradient(900px 400px at 20% 0%, #1c2c63 0%, transparent 55%), var(--bg-dark);
  color: #fff; padding: 84px 0;
}
.network .section-head h2 { color: #fff; }
.network .section-head p { color: rgba(255,255,255,.7); }
.network-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; margin-top: 20px; }
.net-stat {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
}
.net-stat .num { font-size: 34px; font-weight: 800; color: #ffd86b; }
.net-stat .lbl { font-size: 14px; color: rgba(255,255,255,.78); margin-top: 6px; }

/* ---------- Partners / logos ---------- */
.logo-wall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.logo-cell {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  height: 78px; display: grid; place-items: center; color: var(--ink-400);
  font-weight: 700; font-size: 15px; transition: .2s; 
}
.logo-cell:hover { color: var(--primary); box-shadow: var(--shadow-sm); transform: translateY(-3px); }

/* ---------- Testimonials ---------- */
.testi-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.testi-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.testi-card .quote { font-size: 15px; color: var(--ink-700); margin: 0 0 20px; }
.testi-user { display: flex; align-items: center; gap: 12px; }
.testi-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--gradient); color: #fff; display: grid; place-items: center; font-weight: 700; }
.testi-user .n { font-weight: 700; color: var(--ink-900); font-size: 15px; }
.testi-user .r { font-size: 13px; color: var(--ink-400); }

/* ---------- CTA band ---------- */
.cta-band { background: var(--gradient); color: #fff; padding: 70px 0; text-align: center; }
.cta-band h2 { font-size: 32px; margin: 0 0 12px; font-weight: 800; }
.cta-band p { font-size: 17px; color: rgba(255,255,255,.9); margin: 0 0 28px; }
.cta-band .hero-cta { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-dark-2); color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; max-width: 280px; }
.footer-col h4 { color: #fff; font-size: 15px; margin: 0 0 18px; }
.footer-col a { display: block; font-size: 14px; margin-bottom: 12px; color: rgba(255,255,255,.62); }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,.5);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background: radial-gradient(900px 400px at 85% -20%, #4d8bff 0%, transparent 60%),
              linear-gradient(135deg, #1f5cf0, #2b6cff);
  color: #fff; padding: 64px 0 72px; text-align: center;
}
.page-hero h1 { font-size: 40px; margin: 0 0 14px; font-weight: 800; }
.page-hero p { font-size: 17px; color: rgba(255,255,255,.9); margin: 0 auto; max-width: 640px; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,.75); margin-bottom: 18px; }
.breadcrumb a:hover { color: #fff; }

/* ---------- Pricing ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; align-items: stretch; }
.price-card { background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 34px 30px; position: relative; transition:.2s; }
.price-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.price-card.featured { border-color: var(--primary); box-shadow: var(--shadow-md); }
.price-card.featured::before { content:"推荐"; position:absolute; top:18px; right:18px; background:var(--primary); color:#fff; font-size:12px; padding:4px 12px; border-radius:999px; }
.price-card .plan { font-size: 18px; font-weight: 800; color: var(--ink-900); }
.price-card .price { font-size: 38px; font-weight: 800; color: var(--primary); margin: 12px 0 4px; }
.price-card .price small { font-size: 15px; color: var(--ink-400); font-weight: 500; }
.price-card .desc { font-size: 14px; color: var(--ink-400); margin-bottom: 22px; }
.price-card .check-list { margin-bottom: 26px; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { text-align: center; padding: 0 8px; }
.step .num { width: 54px; height: 54px; border-radius: 50%; background: var(--gradient); color:#fff; font-weight:800; font-size:20px; display:grid; place-items:center; margin:0 auto 16px; box-shadow: 0 10px 22px rgba(43,108,255,.35); }
.step h4 { margin: 0 0 8px; color: var(--ink-900); font-size: 17px; }
.step p { margin: 0; font-size: 14px; color: var(--ink-500); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 14px; overflow: hidden; background:#fff; }
.faq-q { padding: 18px 22px; font-weight: 700; color: var(--ink-900); cursor: pointer; display:flex; justify-content: space-between; align-items:center; }
.faq-q .pm { color: var(--primary); font-size: 20px; transition:.2s; }
.faq-a { padding: 0 22px; max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s ease; color: var(--ink-500); font-size: 15px; }
.faq-item.open .faq-a { max-height: 260px; padding: 0 22px 20px; }
.faq-item.open .faq-q .pm { transform: rotate(45deg); }

/* ---------- Contact ---------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items:start; }
.contact-info .ci { display:flex; gap:16px; margin-bottom: 26px; }
.contact-info .ci .ic { width:48px; height:48px; border-radius:12px; background:var(--primary-50); color:var(--primary); display:grid; place-items:center; flex:none; }
.contact-info .ci .t { font-weight:700; color:var(--ink-900); }
.contact-info .ci .d { font-size:14px; color:var(--ink-500); }
.form-card { background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 18px; }
.field label { display:block; font-size:14px; font-weight:600; color:var(--ink-700); margin-bottom:8px; }
.field input, .field textarea, .field select {
  width:100%; border:1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  font-size:15px; font-family:inherit; color:var(--ink-900); outline:none; transition:.15s; background:#fff;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-50); }
.field textarea { resize: vertical; min-height: 120px; }

/* ---------- About values ---------- */
.value-grid { display:grid; grid-template-columns: repeat(3,1fr); gap:24px; }
.value-card { text-align:center; padding: 30px 24px; border:1px solid var(--line); border-radius: var(--radius); background:#fff; }
.value-card .ic { width:60px; height:60px; margin:0 auto 16px; border-radius:16px; background:var(--primary-50); color:var(--primary); display:grid; place-items:center; }
.value-card h3 { margin:0 0 8px; color:var(--ink-900); }
.value-card p { margin:0; font-size:14px; color:var(--ink-500); }

/* timeline */
.timeline { max-width: 760px; margin: 0 auto; position: relative; padding-left: 30px; }
.timeline::before { content:""; position:absolute; left: 6px; top: 6px; bottom: 6px; width:2px; background: var(--primary-100); }
.tl-item { position: relative; margin-bottom: 30px; }
.tl-item::before { content:""; position:absolute; left:-30px; top: 4px; width:14px; height:14px; border-radius:50%; background:var(--primary); box-shadow:0 0 0 4px var(--primary-50); }
.tl-item .yr { font-weight:800; color:var(--primary); font-size:16px; }
.tl-item p { margin: 4px 0 0; color: var(--ink-500); font-size:15px; }

/* ---------- Prose content (legal / info pages) ---------- */
.container--narrow { max-width: 860px; }
.content-lead { font-size: 17px; color: var(--ink-500); margin: 0 0 28px; }
.prose { color: var(--ink-700); font-size: 15.5px; }
.prose h2 { font-size: 24px; color: var(--ink-900); margin: 32px 0 14px; font-weight: 800; }
.prose h3 { font-size: 19px; color: var(--ink-900); margin: 24px 0 10px; }
.prose p { margin: 0 0 14px; }
.prose ul { list-style: disc; padding-left: 22px; margin: 0 0 16px; }
.prose ul li { margin-bottom: 8px; }
.prose a { color: var(--primary); }
.prose strong { color: var(--ink-900); }

/* ---------- Developer code card ---------- */
.code-card { background:#0d1430; border-radius:16px; overflow:hidden; box-shadow:var(--shadow-md); }
.code-top { display:flex; align-items:center; gap:8px; padding:14px 18px; border-bottom:1px solid rgba(255,255,255,.08); }
.code-top .mock-title{ color:rgba(255,255,255,.5); margin-left:auto; font-size:12px; }
.code-card pre { margin:0; padding:22px; overflow:auto; color:#cdd6f4; font-size:13.5px; line-height:1.7; font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace; }
.code-card .k{color:#89b4fa;} .code-card .s{color:#a6e3a1;} .code-card .c{color:#6c7393;} .code-card .n{color:#fab387;}

/* utility */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .feature-grid, .testi-grid, .price-grid, .value-grid { grid-template-columns: repeat(2, 1fr); }
  .channel-card { grid-template-columns: repeat(2, 1fr); }
  .channel-item:nth-child(2) { border-right: 0; }
  .network-grid { grid-template-columns: repeat(2,1fr); }
  .steps { grid-template-columns: repeat(2,1fr); }
  .logo-wall { grid-template-columns: repeat(3,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 36px; }
}
@media (max-width: 640px) {
  .nav-menu, .nav-actions .login, .nav-actions .btn-outline { display: none; }
  .nav-toggle { display: block; }
  .nav.open .nav-menu {
    display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; padding: 16px 24px; gap: 8px; box-shadow: var(--shadow-md); border-bottom:1px solid var(--line);
  }
  .feature-grid, .testi-grid, .price-grid, .value-grid, .channel-card, .network-grid, .steps, .logo-wall, .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .section { padding: 56px 0; }
  .section-head h2, .page-hero h1 { font-size: 26px; }
}