:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #dbeafe;
  --primary-soft: #eff6ff;
  --accent: #b91c1c;
  --accent-dark: #991b1b;
  --bg: #ffffff;
  --bg-alt: #ffffff;
  --text: #222222;
  --text-soft: #555555;
  --muted: #6b7280;
  --border: #e0e7f1;
  --shadow: 0 2px 8px rgba(59, 130, 246, 0.06);
  --shadow-lg: 0 6px 20px rgba(59, 130, 246, 0.1);
  --radius: 10px;
  --maxw: 1180px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
  color: var(--primary);
  -webkit-align-items: center;
}
.brand-mark-img {
  width: 28px;
  height: 28px;
  min-width: 28px;
  min-height: 28px;
  max-width: 28px;
  max-height: 28px;
  object-fit: contain;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  -webkit-flex-shrink: 0;
  image-rendering: -webkit-optimize-contrast;
}
.brand-mark-img-sm {
  width: 24px;
  height: 24px;
  min-width: 24px;
  min-height: 24px;
  max-width: 24px;
  max-height: 24px;
}
.brand-name {
  font-size: 18px;
  line-height: 1;
  display: inline-block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
}
.nav-links a.cta-link {
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid var(--primary);
}
.nav-links a.cta-link:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
}

@media (max-width: 880px) {
  .menu-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open { max-height: 480px; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-links a.cta-link { margin-top: 12px; border-bottom: 0; text-align: center; }
}

/* ============ Hero ============ */
.hero {
  padding: 100px 0 80px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 920px; }
.eyebrow {
  letter-spacing: 4px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.2;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.hero h1 em { font-style: normal; color: var(--primary); }
.lede {
  font-size: 18px;
  color: var(--text-soft);
  margin: 0 0 36px;
  max-width: 720px;
}
.lede strong { color: var(--primary-dark); }
.hero-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.meta-item {
  background: #fff;
  padding: 16px 22px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.meta-num { font-size: 26px; font-weight: 800; color: var(--primary-dark); }
.meta-label { font-size: 13px; color: var(--muted); }
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--primary);
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.25);
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); }
.btn-ghost {
  background: #fff;
  color: var(--primary-dark);
  border-color: var(--primary);
}
.btn-ghost:hover { background: var(--primary-soft); color: var(--primary-dark); }

/* ============ Section Base ============ */
.section { padding: 96px 0; }
.section-alt { background: #ffffff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  letter-spacing: 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  margin: 0 0 10px;
}
.section h2 {
  font-size: clamp(28px, 4.2vw, 40px);
  margin: 0 0 16px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.section-sub {
  color: var(--text-soft);
  max-width: 640px;
  margin: 0 auto;
  font-size: 16px;
}

/* ============ Business ============ */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.biz-card {
  background: #ffffff;
  border-radius: var(--radius);
  padding: 30px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
}
.biz-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.biz-card-feature {
  grid-row: span 2;
  background: var(--primary-soft);
  border-color: var(--primary-light);
  color: var(--text);
}
.biz-card-feature p { color: var(--text-soft); }

.biz-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--primary-dark);
  background: var(--primary-light);
  border: 1px solid var(--primary-light);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}
.biz-card h3 { margin: 0 0 12px; font-size: 20px; }
.biz-card p { color: var(--text-soft); margin: 0 0 16px; }
.biz-stats {
  list-style: none;
  padding: 18px 0 0;
  margin: 18px 0 0;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 18px;
}
.biz-stats li { display: flex; flex-direction: column; }
.biz-stats strong { font-size: 26px; color: var(--primary-dark); }
.biz-stats span { font-size: 12px; color: var(--muted); }
.biz-foot {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

@media (max-width: 880px) {
  .biz-grid { grid-template-columns: 1fr; }
  .biz-card-feature { grid-row: auto; }
}

/* ============ Founder ============ */
.founder-wrap {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 56px;
  align-items: flex-start;
}
.founder-photo .portrait {
  border-radius: 22px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-light);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  line-height: 0;
}
.portrait-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.founder-quote {
  font-size: 17px;
  color: var(--text-soft);
  border-left: 4px solid var(--primary);
  padding: 6px 0 6px 18px;
  margin: 0 0 28px;
}
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.timeline li {
  background: #fff;
  border-radius: var(--radius);
  padding: 18px 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.t-year {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  font-weight: 700;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.timeline p { margin: 0; color: var(--text-soft); }
.timeline strong { color: var(--text); }

@media (max-width: 880px) {
  .founder-wrap { grid-template-columns: 1fr; gap: 28px; }
  .founder-photo .portrait { max-width: 320px; margin: 0 auto; }
}

/* ============ Projects ============ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.project-card {
  background: #fff;
  padding: 30px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--primary-light); box-shadow: var(--shadow-lg); }
.project-card-span { grid-column: span 2; }
.project-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.project-card h3 { margin: 0 0 12px; font-size: 20px; }
.project-card p { margin: 0; color: var(--text-soft); }
.industry-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.industry-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-light);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text);
}
.industry-num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary-dark);
  border: 1px solid var(--primary-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}

@media (max-width: 880px) {
  .project-grid { grid-template-columns: 1fr; }
  .project-card-span { grid-column: span 1; }
  .industry-grid { grid-template-columns: 1fr; }
}

/* ============ Pricing ============ */
.pricing-table-wrap {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow-x: auto;
}
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
.pricing-table th, .pricing-table td {
  padding: 20px 22px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: 14px;
}
.pricing-table th {
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 700;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--primary-light);
}
.pricing-table tr:last-child td { border-bottom: 0; }
.pricing-table tr:hover td { background: var(--primary-soft); }
.phase {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  border: 1px solid var(--primary-light);
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 13px;
}
.pricing-notes {
  margin-top: 24px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 18px 22px;
}
.pricing-notes h4 { margin: 0 0 10px; }
.pricing-notes ul { margin: 0; padding-left: 18px; color: var(--text-soft); }
.pricing-notes li { margin-bottom: 6px; }
.tag-inline {
  display: inline-block;
  margin: 4px 6px 0 0;
  background: var(--primary-light);
  border: 1px solid var(--primary-light);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--primary-dark);
  font-weight: 600;
}

/* ============ CTA / Contact ============ */
.section-cta {
  background: #ffffff;
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-cta h2 { color: var(--text); }
.section-cta p { color: var(--text-soft); }
.cta-wrap { max-width: 720px; margin: 0 auto; }
.contact-form {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted); }
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.contact-form button {
  align-self: center;
}
.form-tip { color: var(--text-soft); font-size: 14px; min-height: 20px; margin: 8px 0 0; }

@media (max-width: 720px) {
  .form-row { grid-template-columns: 1fr; }
}

/* ============ Footer ============ */
.site-footer {
  background: #ffffff;
  color: var(--text-soft);
  padding: 36px 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-title { font-weight: 700; color: var(--text); }
.footer-sub { margin: 4px 0 0; font-size: 13px; color: var(--muted); }
.footer-info { font-size: 13px; text-align: right; color: var(--muted); }
.footer-info p { margin: 4px 0; }

@media (max-width: 720px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-info { text-align: left; }
}