:root {
  --bg: #f5f7fb;
  --bg-soft: #eef3f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe3ee;
  --line-strong: #c7d2e3;
  --brand: #0f172a;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --success: #0f766e;
  --success-bg: #ecfdf5;
  --warn-bg: #fff7ed;
  --error: #b91c1c;
  --error-bg: #fef2f2;
  --info-bg: #eff6ff;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.07);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 30%),
    linear-gradient(180deg, #f9fbff 0%, var(--bg) 38%, #f6f8fc 100%);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(245, 247, 251, 0.78);
  border-bottom: 1px solid rgba(219, 227, 238, 0.88);
}
.topbar-inner {
  min-height: 74px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.logo-wrap { display: flex; align-items: center; gap: 14px; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 14px;
  background: linear-gradient(135deg, #111827 0%, #2563eb 100%);
  color: #fff; display: grid; place-items: center; font-weight: 700;
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.18);
}
.logo-text strong { display: block; font-size: 18px; letter-spacing: 0.08em; }
.logo-text span { display: block; font-size: 12px; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 11px 16px; border-radius: 999px; background: var(--brand); color: #fff !important;
  font-weight: 600; box-shadow: 0 14px 28px rgba(15, 23, 42, 0.16);
}
.hero { padding: 92px 0 54px; }
.hero-grid {
  display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 26px; align-items: stretch;
}
.hero-card, .panel, .card, .stat, .quote, .pricing, .cta, .feature-band {
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card { padding: 40px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--muted);
  padding: 8px 12px; border-radius: 999px; background: var(--bg-soft);
}
.hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.5rem, 6vw, 4.4rem);
  line-height: 1.06; letter-spacing: -0.05em;
}
.hero p.lead {
  margin: 0; color: var(--muted); font-size: 18px; max-width: 46rem;
}
.actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 50px; padding: 0 18px; border-radius: 13px;
  border: 1px solid var(--line-strong); font-weight: 600; transition: .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn[disabled] { opacity: .7; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.btn-secondary { background: #fff; color: var(--text); }
.btn-ghost { background: var(--surface-2); color: var(--text); }
.hero-side { display: grid; gap: 18px; }
.panel { padding: 24px; }
.panel h3, .card h3, .pricing h3, .quote h3 { margin: 0 0 12px; font-size: 18px; }
.muted { color: var(--muted); }
.list { margin: 0; padding-left: 18px; }
.list li + li { margin-top: 6px; }
.section { padding: 28px 0; }
.section-head {
  display: flex; align-items: end; justify-content: space-between; gap: 24px;
  margin-bottom: 20px;
}
.section-head h2 {
  margin: 0 0 8px; font-size: clamp(1.9rem, 3vw, 2.4rem); letter-spacing: -0.03em;
}
.section-head p { margin: 0; color: var(--muted); }
.grid-3, .grid-2, .pricing-grid, .stats-grid, .case-grid, .form-grid {
  display: grid; gap: 20px;
}
.grid-3, .pricing-grid, .case-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2, .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .pricing, .stat, .quote { padding: 24px; }
.tag {
  display: inline-flex; padding: 6px 10px; border-radius: 999px;
  background: var(--bg-soft); color: var(--muted); font-size: 12px; margin-bottom: 12px;
}
.card p, .pricing p { margin: 0; }
.band {
  padding: 24px; border-radius: var(--radius); background: linear-gradient(135deg, #0f172a 0%, #162b55 100%);
  color: white; box-shadow: 0 20px 60px rgba(15,23,42,0.18);
}
.band p { color: rgba(255,255,255,.78); margin: 8px 0 0; }
.steps { display: grid; gap: 14px; }
.step {
  display: grid; grid-template-columns: 38px 1fr; gap: 14px; align-items: start;
  padding: 16px 0; border-top: 1px solid var(--line);
}
.step:first-child { border-top: 0; padding-top: 0; }
.num {
  width: 38px; height: 38px; border-radius: 999px;
  display: grid; place-items: center; background: var(--bg-soft); font-weight: 700;
}
.price {
  margin: 12px 0 10px; font-size: 28px; line-height: 1; font-weight: 700; letter-spacing: -0.03em;
}
.price-note { color: var(--muted); font-size: 14px; }
.stat strong { display: block; font-size: 30px; letter-spacing: -0.04em; margin-bottom: 8px; }
.quote {
  background: linear-gradient(180deg, #fff 0%, #f8fbff 100%);
}
.quote blockquote {
  margin: 0; font-size: 18px; line-height: 1.8; color: var(--text);
}
.quote footer { margin-top: 14px; color: var(--muted); font-size: 14px; }
.cta {
  margin: 40px 0 80px; padding: 32px;
  background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 100%);
  color: #fff; border: 0;
}
.cta p { color: rgba(255,255,255,.84); margin: 10px 0 0; }
.cta .actions .btn-secondary, .cta .actions .btn-ghost {
  background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.2);
}
.footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 46px; color: var(--muted); font-size: 14px;
}
.footer-inner {
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.kicker { font-size: 13px; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .12em; }
.code-box {
  padding: 16px 18px; border-radius: 14px; background: #0b1220; color: #dbeafe;
  font-size: 14px; overflow: auto; border: 1px solid rgba(255,255,255,.04);
}
.form-shell {
  padding: 34px; background: rgba(255,255,255,0.94); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
label { font-size: 14px; font-weight: 600; }
input, textarea, select {
  width: 100%; padding: 14px 15px; border-radius: 12px; border: 1px solid var(--line-strong);
  background: white; color: var(--text); font: inherit;
}
textarea { min-height: 140px; resize: vertical; }
input:focus, textarea:focus, select:focus {
  outline: none; border-color: #7aa2ff; box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}
.checkbox-group {
  display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0, 1fr));
}
.checkbox-item {
  display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--surface-2);
}
.checkbox-item input { width: 16px; margin-top: 4px; }
.form-note {
  padding: 14px 16px; border-radius: 12px; background: var(--accent-soft); color: #1e3a8a; font-size: 14px;
}
.copybox {
  margin-top: 18px; padding: 18px; border-radius: 14px; background: var(--surface-2); border: 1px dashed var(--line-strong);
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
hr.sep { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.small { font-size: 14px; }
.file-meta {
  padding: 12px 14px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line); color: var(--text);
}
.status-box {
  padding: 12px 14px; border-radius: 12px; border: 1px solid transparent; min-height: 22px;
}
.status-box.info { background: var(--info-bg); color: #1d4ed8; border-color: #bfdbfe; }
.status-box.success { background: var(--success-bg); color: var(--success); border-color: #a7f3d0; }
.status-box.error { background: var(--error-bg); color: var(--error); border-color: #fecaca; }
.lead-card { display: grid; gap: 16px; }
.lead-head {
  display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; flex-wrap: wrap;
}
.lead-topline { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.lead-title { margin: 0; font-size: 20px; letter-spacing: -0.02em; }
.lead-meta { margin: 4px 0 0; }
.lead-status-wrap { min-width: 160px; }
.lead-badges { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; padding: 7px 11px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--muted); font-size: 12px;
}
.chip-strong { background: var(--accent-soft); color: #1d4ed8; border-color: #bfdbfe; }
.lead-section { display: grid; gap: 6px; }
.lead-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.attachment-box {
  display: flex; justify-content: space-between; gap: 14px; align-items: center; flex-wrap: wrap;
  padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-2);
}
.attachment-actions { margin-top: 0; }
.lead-note-wrap { margin-top: 4px; }
.lead-note-actions { margin-top: 10px; justify-content: flex-start; }
@media (max-width: 980px) {
  .hero-grid, .grid-3, .grid-2, .pricing-grid, .stats-grid, .case-grid, .form-grid { grid-template-columns: 1fr; }
  .section-head { display: block; }
  .hero { padding-top: 54px; }
}
@media (max-width: 760px) {
  .container { width: min(var(--max), calc(100% - 28px)); }
  .topbar-inner { min-height: 68px; }
  .nav-links { display: none; }
  .hero-card, .panel, .card, .pricing, .stat, .quote, .cta, .form-shell { padding: 22px; }
  .checkbox-group { grid-template-columns: 1fr; }
  .lead-head, .attachment-box { display: grid; }
}