:root {
  --brand: #1769e8;
  --brand-dark: #0b4eb7;
  --accent: #ff7a1a;
  --ink: #16243d;
  --muted: #61708a;
  --line: #e3eaf5;
  --soft: #f4f8ff;
  --white: #fff;
  --shadow: 0 14px 42px rgba(28, 71, 138, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: #fff; line-height: 1.65; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-head { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.head-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; font-size: 25px; font-weight: 800; letter-spacing: -.5px; color: var(--brand); }
.brand i { width: 28px; height: 28px; margin-right: 9px; border-radius: 8px; background: linear-gradient(135deg, var(--brand), #65a8ff); box-shadow: inset -7px -7px 0 rgba(255,255,255,.2); }
.nav { display: flex; align-items: center; gap: 26px; color: #374761; font-size: 15px; }
.nav a:hover, .nav a.active { color: var(--brand); }
.head-actions { display: flex; gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border: 1px solid transparent; border-radius: 7px; font-weight: 650; transition: .2s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(23,105,232,.18); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border-color: #c8d8f0; background: #fff; color: var(--brand); }
.hero { position: relative; overflow: hidden; padding: 92px 0 70px; background: linear-gradient(125deg, #f6faff 0%, #eef5ff 55%, #f8fbff 100%); border-bottom: 1px solid var(--line); }
.hero:before { content: ""; position: absolute; width: 520px; height: 520px; right: -150px; top: -260px; border-radius: 50%; background: radial-gradient(circle, rgba(23,105,232,.16), transparent 68%); }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.16fr .84fr; align-items: center; gap: 60px; }
.hero-grid > * { min-width: 0; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--brand); background: #e8f1ff; border: 1px solid #cfe0fb; padding: 6px 12px; border-radius: 999px; font-size: 13px; font-weight: 700; letter-spacing: .5px; }
.eyebrow:before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #34b46e; box-shadow: 0 0 0 4px rgba(52,180,110,.12); }
h1 { margin: 20px 0 18px; font-size: clamp(38px, 5vw, 60px); line-height: 1.14; letter-spacing: -1.8px; }
.hero.compact h1 { font-size: clamp(36px, 4vw, 52px); }
h1 em { color: var(--brand); font-style: normal; }
.hero-lead { max-width: 690px; margin: 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; color: #50617b; font-size: 14px; }
.trust-row span:before { content: "✓"; margin-right: 7px; color: #21a565; font-weight: 800; }
.hero-panel { position: relative; border: 1px solid #d8e5f7; border-radius: 18px; padding: 30px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); }
.panel-label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px; }
.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.metric { padding: 17px; border-radius: 10px; background: var(--soft); border: 1px solid #e6eef9; }
.metric strong { display: block; color: var(--brand); font-size: 25px; line-height: 1.2; }
.metric small { color: var(--muted); }
.section { padding: 78px 0; }
.section-soft { background: var(--soft); }
.section-head { max-width: 760px; margin: 0 auto 42px; text-align: center; }
.section-head h2 { margin: 8px 0 12px; font-size: clamp(29px, 3.5vw, 40px); line-height: 1.25; }
.section-head p { margin: 0; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { position: relative; padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 13px; box-shadow: 0 7px 24px rgba(32,71,130,.06); }
.card:hover { border-color: #bcd4f7; box-shadow: var(--shadow); }
.card .tag { display: inline-block; padding: 4px 9px; border-radius: 5px; background: #edf4ff; color: var(--brand); font-size: 12px; font-weight: 700; }
.card h3 { margin: 15px 0 8px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card-link { display: inline-block; margin-top: 20px; color: var(--brand); font-weight: 700; }
.spec-table { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: var(--shadow); }
.spec-row { display: grid; grid-template-columns: 1.35fr repeat(4, .8fr) 1fr; align-items: center; min-height: 70px; padding: 0 22px; border-bottom: 1px solid var(--line); }
.spec-row:last-child { border: 0; }
.spec-row.head { min-height: 52px; background: #edf4ff; color: #4a5d79; font-size: 13px; font-weight: 700; }
.spec-row strong { color: var(--brand); }
.price { color: #f06416; font-size: 22px; font-weight: 800; }
.price small { color: var(--muted); font-size: 12px; font-weight: 400; }
.two-col { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.check-list { padding: 0; margin: 18px 0 0; list-style: none; }
.check-list li { position: relative; padding: 9px 0 9px 28px; border-bottom: 1px dashed #dfe7f3; }
.check-list li:before { content: "✓"; position: absolute; left: 0; color: #21a565; font-weight: 800; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { padding: 25px; border-left: 3px solid var(--brand); background: #fff; box-shadow: 0 6px 20px rgba(28,71,138,.06); }
.step:before { counter-increment: step; content: "0" counter(step); display: block; color: #a6b9d4; font-size: 13px; font-weight: 800; }
.step h3 { margin: 7px 0; }
.step p { margin: 0; color: var(--muted); font-size: 14px; }
.faq { max-width: 880px; margin: 0 auto; }
.faq details { margin: 12px 0; padding: 19px 22px; border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 12px 0 0; color: var(--muted); }
.cta { padding: 56px 0; color: #fff; background: linear-gradient(120deg, var(--brand-dark), var(--brand)); }
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.cta h2 { margin: 0 0 8px; font-size: 31px; }
.cta p { margin: 0; color: rgba(255,255,255,.82); }
.cta .btn { background: #fff; color: var(--brand); white-space: nowrap; }
.site-foot { padding: 32px 0; background: #101c31; color: #aebbd0; font-size: 14px; }
.foot-inner { display: flex; justify-content: space-between; gap: 24px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 18px; }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.plan { padding: 30px; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: 0 7px 24px rgba(32,71,130,.06); }
.plan.featured { border: 2px solid var(--brand); transform: translateY(-8px); }
.plan h3 { margin: 4px 0 8px; font-size: 22px; }
.plan-price { margin: 14px 0 18px; color: #f06416; font-size: 38px; font-weight: 850; }
.plan-price small { color: var(--muted); font-size: 14px; font-weight: 400; }
.note { margin-top: 20px; color: var(--muted); font-size: 13px; text-align: center; }
@media (max-width: 960px) {
  .nav { display: none; }
  .hero-grid, .two-col { grid-template-columns: 1fr; }
  .hero { padding-top: 64px; }
  .cards, .plan-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .spec-row { grid-template-columns: 1.2fr repeat(2, .8fr); gap: 8px; padding: 14px 18px; }
  .spec-row > :nth-child(4), .spec-row > :nth-child(5), .spec-row > :nth-child(6) { display: none; }
}
@media (max-width: 640px) {
  .wrap { width: min(100% - 28px, 1180px); }
  .head-actions .btn-ghost { display: none; }
  .btn { padding: 0 17px; }
  h1, .hero.compact h1 { font-size: 38px; }
  .hero-panel { padding: 20px; }
  .cards, .plan-grid, .steps { grid-template-columns: 1fr; }
  .plan.featured { transform: none; }
  .section { padding: 58px 0; }
  .cta-inner, .foot-inner { align-items: flex-start; flex-direction: column; }
}