/* 方案报价单官网（纯静态，无构建） */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #222; background: #fff; line-height: 1.7;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px); border-bottom: 1px solid #eef2f8;
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 20px; height: 60px;
  display: flex; align-items: center; gap: 28px;
}
.logo { font-size: 19px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.logo-dot { width: 12px; height: 12px; border-radius: 4px; background: linear-gradient(135deg, #1a7cff, #4d9bff); }
.nav-links { display: flex; gap: 24px; margin-left: auto; font-size: 15px; color: #555; }
.nav-links a:hover { color: #1a7cff; }
.nav-cta {
  background: #1a7cff; color: #fff; font-size: 14px; padding: 8px 18px; border-radius: 20px;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(160deg, #f2f7ff 0%, #e8f1ff 55%, #ffffff 100%);
  padding: 72px 20px 80px;
}
.hero-inner {
  max-width: 1080px; margin: 0 auto; display: flex; align-items: center; gap: 56px;
}
.hero-text { flex: 1; }
.hero h1 { font-size: 42px; line-height: 1.35; letter-spacing: 1px; }
.hero-sub { color: #667; font-size: 17px; margin-top: 20px; max-width: 560px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; font-size: 14px; color: #2b6fd8; }
.hero-qr {
  background: #fff; border-radius: 16px; padding: 20px 20px 14px; text-align: center;
  box-shadow: 0 12px 40px rgba(26,124,255,.14); flex-shrink: 0;
}
.hero-qr img { width: 190px; height: 190px; display: block; }
.hero-qr p { font-size: 14px; color: #666; margin-top: 10px; }

/* ===== 通用区块 ===== */
.section { max-width: 1080px; margin: 0 auto; padding: 72px 20px; }
.section-alt { background: #f7f9fc; max-width: none; }
.section-alt > * { max-width: 1040px; margin-left: auto; margin-right: auto; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 30px; }
.section-head p { color: #889; margin-top: 10px; font-size: 16px; }

/* ===== 功能矩阵 ===== */
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid #eef2f8; border-radius: 14px; padding: 26px 22px;
  transition: all .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(26,124,255,.1); border-color: #cfe3ff; }
.card-icon { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { font-size: 14px; color: #667; }

/* ===== 绑定步骤 ===== */
.steps-row { display: flex; align-items: stretch; gap: 18px; justify-content: center; }
.step-box {
  background: #fff; border-radius: 14px; padding: 28px 24px; width: 290px; text-align: left;
  border: 1px solid #eef2f8;
}
.step-num {
  width: 34px; height: 34px; border-radius: 17px; background: #1a7cff; color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700;
  margin-bottom: 14px;
}
.step-box h4 { font-size: 17px; margin-bottom: 8px; }
.step-box p { font-size: 14px; color: #667; }
.step-arrow { align-self: center; color: #b9c8de; font-size: 26px; }
.bind-note { text-align: center; color: #d48806; font-size: 13px; margin-top: 26px; }

/* ===== 订阅 ===== */
.pricing-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.price-card {
  border: 1px solid #e8ecf2; border-radius: 14px; padding: 28px 24px; text-align: center;
  position: relative; overflow: hidden;
}
.price-card.hot { border-color: #1a7cff; box-shadow: 0 10px 30px rgba(26,124,255,.12); }
.hot-tag {
  position: absolute; top: 14px; right: -34px; transform: rotate(45deg);
  background: #1a7cff; color: #fff; font-size: 12px; padding: 3px 40px;
}
.price-card h3 { font-size: 17px; color: #445; }
.price { font-size: 24px; font-weight: 700; color: #1a7cff; margin: 12px 0 16px; }
.price-card ul { list-style: none; text-align: left; }
.price-card li {
  font-size: 14px; color: #667; padding: 6px 0 6px 20px; position: relative;
}
.price-card li::before { content: "✓"; position: absolute; left: 0; color: #18a058; }
.price-note { text-align: center; color: #889; font-size: 14px; margin-top: 28px; }

/* ===== CTA ===== */
.cta { background: linear-gradient(135deg, #1a7cff, #4d9bff); padding: 64px 20px; }
.cta-inner {
  max-width: 1080px; margin: 0 auto; display: flex; align-items: center; gap: 48px; color: #fff;
}
.cta-qr { background: #fff; border-radius: 14px; padding: 12px; flex-shrink: 0; }
.cta-qr img { width: 160px; height: 160px; display: block; }
.cta-text h2 { font-size: 28px; line-height: 1.4; }
.cta-text p { margin-top: 14px; font-size: 16px; opacity: .9; }
.cta-tip { font-size: 14px !important; opacity: .75 !important; }

/* ===== Footer ===== */
.footer { text-align: center; padding: 36px 20px; color: #99a; font-size: 14px; background: #f7f9fc; }
.footer-minor { font-size: 13px; margin-top: 6px; color: #aab; }

/* ===== 移动端适配 ===== */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-row { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { flex-direction: column; text-align: center; gap: 36px; }
  .hero-text { width: 100%; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-points { justify-content: center; }
  .steps-row { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); }
  .step-box { width: 100%; max-width: 420px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .hero { padding: 48px 16px 56px; }
  .hero h1 { font-size: 30px; }
  .section { padding: 52px 16px; }
  .grid { grid-template-columns: 1fr; }
  .pricing-row { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 24px; }
}