/* ============ 驻足企业 · PatX AI付费咨询 ============ */
:root {
  --primary: #14459C;
  --primary-dark: #0E2F6E;
  --cyan: #29B6E8;
  --cyan-light: #E3F6FD;
  --bg: #F7F9FC;
  --card: #FFFFFF;
  --text: #1F2A44;
  --muted: #5B6B85;
  --border: #E3E9F2;
  --shadow: 0 8px 30px rgba(20, 69, 156, .08);
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header .container { display: flex; align-items: center; height: 68px; gap: 32px; }
.logo img { height: 46px; }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a {
  padding: 8px 16px; border-radius: 8px; font-size: 15px;
  color: var(--muted); transition: .2s;
}
.nav a:hover, .nav a.active { color: var(--primary); background: var(--cyan-light); }
.btn {
  display: inline-block; padding: 10px 26px; border-radius: 10px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
  transition: .2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  box-shadow: 0 6px 18px rgba(41,182,232,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(41,182,232,.45); }
.btn-ghost { border: 1.5px solid var(--primary); color: var(--primary); background: transparent; }
.btn-ghost:hover { background: var(--cyan-light); }
.header .btn { padding: 8px 20px; font-size: 14px; }
.menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--primary); cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(700px 380px at 85% 10%, rgba(41,182,232,.18), transparent),
    radial-gradient(600px 400px at 10% 90%, rgba(20,69,156,.12), transparent),
    linear-gradient(160deg, #0E2F6E 0%, #14459C 55%, #1E7FBF 100%);
  color: #fff; padding: 110px 0 130px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(transparent 96%, rgba(255,255,255,.06) 96%) 0 0/100% 44px;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; max-width: 900px; text-align: center; }
.hero .tag {
  display: inline-block; padding: 6px 18px; border-radius: 999px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25);
  font-size: 14px; letter-spacing: 1px; margin-bottom: 26px;
}
.hero h1 { font-size: 44px; line-height: 1.3; letter-spacing: 1px; }
.hero h1 span { background: linear-gradient(90deg, #7FE3FF, #29B6E8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { margin: 22px auto 36px; font-size: 17px; color: rgba(255,255,255,.85); max-width: 640px; }
.hero .actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero .btn-ghost { border-color: rgba(255,255,255,.6); color: #fff; }
.hero .btn-ghost:hover { background: rgba(255,255,255,.12); }
.hero-stats {
  display: flex; gap: 0; justify-content: center; margin-top: 70px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius); overflow: hidden;
}
.hero-stats .stat { padding: 22px 46px; text-align: center; }
.hero-stats .stat + .stat { border-left: 1px solid rgba(255,255,255,.15); }
.hero-stats b { display: block; font-size: 26px; }
.hero-stats span { font-size: 13px; color: rgba(255,255,255,.7); }

/* ---------- 通用区块 ---------- */
section.block { padding: 84px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 54px; }
.section-head .kicker { color: var(--cyan); font-weight: 700; font-size: 14px; letter-spacing: 3px; }
.section-head h2 { font-size: 32px; margin: 10px 0 14px; }
.section-head p { color: var(--muted); }

.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow);
  transition: .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 14px 40px rgba(20,69,156,.14); }
.card .icon {
  width: 52px; height: 52px; border-radius: 12px; display: flex;
  align-items: center; justify-content: center; font-size: 26px;
  background: linear-gradient(135deg, var(--primary), var(--cyan)); color: #fff;
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }

/* ---------- 双能力大卡 ---------- */
.capability {
  border-radius: 20px; overflow: hidden; color: #fff; padding: 46px;
  position: relative;
}
.capability.text-gen { background: linear-gradient(135deg, #0E2F6E, #1E5FBF); }
.capability.img-gen { background: linear-gradient(135deg, #1266A8, #29B6E8); }
.capability h3 { font-size: 24px; margin: 14px 0 12px; }
.capability .badge {
  display: inline-block; font-size: 12px; padding: 4px 14px;
  background: rgba(255,255,255,.18); border-radius: 999px; letter-spacing: 1px;
}
.capability ul { list-style: none; margin-top: 18px; }
.capability li { padding: 7px 0 7px 26px; position: relative; font-size: 14.5px; color: rgba(255,255,255,.9); }
.capability li::before { content: "✓"; position: absolute; left: 0; color: #9FE8FF; font-weight: 700; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; position: relative; box-shadow: var(--shadow);
}
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 34px; font-weight: 800; color: var(--cyan-light);
  -webkit-text-stroke: 1.5px var(--cyan); position: absolute; top: 14px; right: 18px;
}
.step h4 { font-size: 17px; margin: 8px 0; }
.step p { font-size: 13.5px; color: var(--muted); }

/* ---------- 价格 ---------- */
.pricing-card { text-align: center; position: relative; }
.pricing-card.featured { border: 2px solid var(--cyan); }
.pricing-card .plan-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  color: #fff; font-size: 12px; padding: 4px 18px; border-radius: 999px;
}
.price { font-size: 40px; font-weight: 800; color: var(--primary); margin: 14px 0 4px; }
.price small { font-size: 14px; color: var(--muted); font-weight: 400; }
.pricing-card ul { list-style: none; margin: 20px 0 26px; text-align: left; }
.pricing-card li { padding: 8px 0 8px 26px; position: relative; font-size: 14.5px; color: var(--muted); }
.pricing-card li::before { content: "✓"; position: absolute; left: 2px; color: var(--cyan); font-weight: 700; }
.pricing-card li.na::before { content: "—"; color: #C4CEDC; }

/* ---------- 表单 ---------- */
.form-card { max-width: 640px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 14.5px; font-family: inherit; background: #FBFCFE;
  transition: .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--cyan); background: #fff;
  box-shadow: 0 0 0 3px rgba(41,182,232,.15);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-success {
  display: none; text-align: center; padding: 40px 20px;
}
.form-success .icon { font-size: 46px; margin-bottom: 12px; }

/* ---------- 合规备案 ---------- */
.compliance {
  background: linear-gradient(135deg, #0B254F, #14459C);
  color: #fff; border-radius: 20px; padding: 44px; display: grid;
  grid-template-columns: auto 1fr; gap: 34px; align-items: center;
}
.compliance .icon { font-size: 46px; }
.compliance h3 { font-size: 21px; margin-bottom: 10px; }
.compliance p { font-size: 14.5px; color: rgba(255,255,255,.8); }
.compliance code {
  background: rgba(255,255,255,.12); padding: 2px 10px; border-radius: 6px;
  font-size: 13px; color: #9FE8FF;
}

/* ---------- 页脚 ---------- */
.footer { background: #0B254F; color: rgba(255,255,255,.72); padding: 60px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer a:hover { color: #9FE8FF; }
.footer ul { list-style: none; }
.footer li { padding: 5px 0; font-size: 14px; }
.footer-brand img { height: 44px; margin-bottom: 16px; }
.footer-brand p { font-size: 13.5px; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding-top: 24px;
  font-size: 12.5px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid-3, .grid-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 32px; }
  .compliance { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 16px 24px;
    border-bottom: 1px solid var(--border); box-shadow: 0 12px 24px rgba(0,0,0,.08);
  }
  .nav.open { display: flex; }
  .menu-toggle { display: block; margin-left: auto; }
  .header .btn-primary { display: none; }
  .grid-2, .grid-3, .grid-4, .steps, .form-row { grid-template-columns: 1fr; }
  .hero { padding: 70px 0 80px; }
  .hero-stats { flex-direction: column; }
  .hero-stats .stat + .stat { border-left: none; border-top: 1px solid rgba(255,255,255,.15); }
  section.block { padding: 56px 0; }
}