/* 潍坊创优信息技术有限公司 - chuangyoukeji.cn */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --accent: #7c3aed;
  --dark: #0f172a;
  --gray: #64748b;
  --light: #f8fafc;
  --border: #e2e8f0;
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--dark);
  line-height: 1.7;
  background: #fff;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-size: 22px; font-weight: 700; color: var(--primary); white-space: nowrap; flex-shrink: 0; }
.logo span { color: var(--dark); font-size: 15px; font-weight: 500; margin-left: 8px; }
.nav-links { display: flex; gap: 20px; list-style: none; align-items: center; }
.nav-links a { font-size: 15px; color: var(--dark); transition: color .2s; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-tel { background: var(--primary); color: #fff !important; padding: 8px 18px; border-radius: 24px; font-weight: 600; }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; }

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #4c1d95 100%);
  color: #fff; padding: 90px 0; text-align: center;
}
.hero h1 { font-size: 42px; line-height: 1.3; margin-bottom: 18px; }
.hero p { font-size: 18px; color: #cbd5e1; max-width: 760px; margin: 0 auto 32px; }
.hero .btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 34px; border-radius: 30px; font-size: 16px; font-weight: 600; transition: all .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border: 1.5px solid rgba(255,255,255,.6); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); }

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: var(--light); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 32px; margin-bottom: 10px; }
.section-title p { color: var(--gray); font-size: 16px; }

/* Cards */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 26px; transition: all .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(37,99,235,.12); border-color: var(--primary); }
.card .icon { font-size: 38px; margin-bottom: 14px; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--gray); font-size: 14.5px; }
.card .more { display: inline-block; margin-top: 14px; color: var(--primary); font-size: 14px; font-weight: 600; }

/* Feature list */
.feature-list { list-style: none; }
.feature-list li { padding: 10px 0 10px 30px; position: relative; color: #334155; }
.feature-list li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step { text-align: center; padding: 24px 12px; }
.step .num {
  width: 48px; height: 48px; line-height: 48px; margin: 0 auto 12px;
  background: var(--primary); color: #fff; border-radius: 50%; font-size: 20px; font-weight: 700;
}
.step h4 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--gray); }

/* FAQ */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
  padding: 18px 22px; font-weight: 600; font-size: 16px; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--primary); }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 22px 18px; color: var(--gray); font-size: 15px; }

/* Page hero (inner pages) */
.page-hero {
  background: linear-gradient(135deg, #1e3a8a, #4c1d95);
  color: #fff; padding: 56px 0; text-align: center;
}
.page-hero h1 { font-size: 34px; margin-bottom: 12px; }
.page-hero p { color: #cbd5e1; max-width: 720px; margin: 0 auto; }
.breadcrumb { font-size: 13px; color: #94a3b8; margin-bottom: 16px; }
.breadcrumb a { color: #cbd5e1; }

/* Content */
.content h2 { font-size: 26px; margin: 40px 0 16px; }
.content h3 { font-size: 20px; margin: 28px 0 12px; }
.content p { color: #334155; margin-bottom: 14px; }
.content ul, .content ol { margin: 0 0 14px 22px; color: #334155; }
.content li { margin-bottom: 6px; }

/* CTA banner */
.cta {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; text-align: center; padding: 56px 20px; border-radius: var(--radius);
}
.cta h2 { font-size: 28px; margin-bottom: 12px; }
.cta p { color: #e0e7ff; margin-bottom: 24px; }
.cta .btn { background: #fff; color: var(--primary); }

/* Footer */
.footer { background: var(--dark); color: #94a3b8; padding: 56px 0 24px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 36px; margin-bottom: 36px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; }
.footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #1e293b; padding-top: 22px; text-align: center; font-size: 13px; }
.footer-bottom a { color: #94a3b8; }

/* Table */
table.compare { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; }
table.compare th, table.compare td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
table.compare th { background: var(--light); }

@media (max-width: 1250px) {
  .logo span { display: none; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 14px; }
}
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 30px; }
}
@media (max-width: 1020px) {
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 20px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}