/* Reliable IT Consulting — enterprise B2B theme. Mobile-first. */
:root {
  --navy: #0a1c33;
  --navy-2: #0e2544;
  --navy-3: #081426;
  --ink: #16233c;
  --muted: #5a6b87;
  --line: #e3e9f3;
  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --blue: #2563eb;
  --blue-dark: #1d4fd7;
  --blue-soft: #e9f0fd;
  --cta: #f59e0b;
  --cta-dark: #dd8a06;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(10, 28, 51, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.6em; color: var(--navy); letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
a { color: var(--blue); }
.container { width: min(1140px, 100% - 2.5rem); margin-inline: auto; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.lede { font-size: 1.125rem; color: var(--muted); }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--navy); color: #fff; padding: 0.75rem 1.25rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* Buttons */
.btn {
  display: inline-block; padding: 0.8rem 1.7rem; border-radius: 8px;
  font-weight: 650; font-size: 1rem; text-decoration: none; border: 2px solid transparent;
  cursor: pointer; transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  text-align: center;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: 0.55rem 1.1rem; font-size: 0.92rem; }
.btn-cta { background: var(--cta); color: var(--navy-3); box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35); }
.btn-cta:hover { background: var(--cta-dark); color: var(--navy-3); }
.btn-outline { border-color: var(--blue); color: var(--blue-dark); background: transparent; }
.btn-outline:hover { background: var(--blue-soft); }
.btn-outline-light { border-color: rgba(255, 255, 255, 0.7); color: #fff; background: transparent; }
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.12); }
.btn-row { display: flex; gap: 0.9rem; flex-wrap: wrap; margin: 1.6rem 0 1rem; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 4px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(6px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--navy); }
.brand-name { font-weight: 750; font-size: 1.02rem; letter-spacing: -0.01em; line-height: 1.2; }
.brand-mark { flex: none; }
.site-nav { display: flex; align-items: center; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: 8px;
  padding: 0.6rem 0.7rem; cursor: pointer;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--navy); margin: 5px 0; border-radius: 2px; }
.nav-menu { display: flex; align-items: center; gap: 1.4rem; }
.nav-menu ul { display: flex; gap: 1.35rem; list-style: none; margin: 0; padding: 0; }
.nav-menu ul a { text-decoration: none; color: var(--ink); font-weight: 550; font-size: 0.98rem; padding: 0.4rem 0; }
.nav-menu ul a:hover { color: var(--blue-dark); }
.nav-menu ul a[aria-current="page"] { color: var(--blue-dark); border-bottom: 2px solid var(--cta); }
.nav-meta { display: flex; align-items: center; gap: 1rem; }
.lang-switch { font-size: 0.9rem; font-weight: 600; white-space: nowrap; }
.lang-cur { color: var(--navy); }
.lang-sep { color: var(--muted); margin: 0 0.35rem; }
.lang-other { color: var(--muted); text-decoration: none; }
.lang-other:hover { color: var(--blue-dark); }

/* Hero */
.hero {
  background:
    radial-gradient(900px 400px at 85% 10%, rgba(37, 99, 235, 0.25), transparent 60%),
    radial-gradient(700px 380px at 10% 90%, rgba(37, 99, 235, 0.14), transparent 60%),
    linear-gradient(160deg, var(--navy-2), var(--navy-3));
  color: #fff; padding: 4.5rem 0;
}
.hero h1 { color: #fff; margin: 0.5rem 0 1rem; }
.hero .lede { color: #c4d2e8; }
.eyebrow {
  color: var(--cta); font-weight: 700; font-size: 0.82rem; letter-spacing: 0.12em;
  text-transform: uppercase; margin: 0;
}
.hero-note { color: #9fb2d0; font-size: 0.9rem; margin-top: 1.4rem; }
.hero-grid { display: grid; gap: 2.5rem; align-items: center; }
.hero-media img { border: 1px solid rgba(255, 255, 255, 0.14); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35); }

/* Sections */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: linear-gradient(160deg, var(--navy-2), var(--navy-3)); }
.section-title { text-align: center; margin-bottom: 0.4em; }
.section-title.left { text-align: left; }
.section-title.light { color: #fff; }
.section-sub { text-align: center; color: var(--muted); max-width: 640px; margin: 0 auto 2.5rem; }
.section-sub.light { color: #c4d2e8; }

/* Help cards */
.help-grid { display: grid; gap: 1.25rem; margin: 2.5rem 0; }
.help-card {
  display: block; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; text-decoration: none; color: inherit; position: relative;
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.help-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #c9d6ec; }
.help-card h3 { margin-bottom: 0.4rem; }
.help-card p { color: var(--muted); margin: 0; font-size: 0.97rem; }
.card-link { position: absolute; right: 1.4rem; bottom: 1.2rem; color: var(--blue); font-weight: 700; }

/* Why grid */
.why-grid { display: grid; gap: 1.25rem; margin-top: 2.5rem; }
.why-item {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; border-top: 3px solid var(--blue);
}
.why-item h3 { font-size: 1.05rem; margin-bottom: 0.35rem; }
.why-item p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* Industries */
.industries-teaser { display: grid; gap: 2.5rem; align-items: center; }
.industries-teaser p { color: var(--muted); }
.industries-grid { display: grid; gap: 1.25rem; margin: 2.5rem 0; }
.industry-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem;
}
.industry-card h3 { margin-bottom: 0.35rem; }
.industry-card > p { color: var(--muted); font-size: 0.96rem; }
.industry-card h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 1rem 0 0.5rem; }
.needs-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.needs-list li { background: var(--blue-soft); color: var(--blue-dark); font-size: 0.85rem; font-weight: 600; padding: 0.28rem 0.7rem; border-radius: 999px; }

/* Pricing */
.plans-grid { display: grid; gap: 1.5rem; margin: 2.5rem 0; align-items: stretch; }
.plan-card {
  background: var(--bg); border-radius: var(--radius); padding: 2rem 1.75rem;
  border: 1px solid var(--line); display: flex; flex-direction: column;
}
.plan-card.featured { border-top: 4px solid var(--cta); box-shadow: 0 14px 40px rgba(0, 0, 0, 0.22); }
.plan-card h3 { margin-bottom: 0.2rem; }
.plan-price { font-size: 1.7rem; font-weight: 800; color: var(--navy); margin: 0.2rem 0; }
.plan-audience { color: var(--muted); font-size: 0.95rem; }
.plan-card .btn { margin-top: auto; }
.plan-note { font-size: 0.88rem; color: var(--muted); font-style: italic; }
.check-list { list-style: none; margin: 1rem 0 1.5rem; padding: 0; }
.check-list li { position: relative; padding-left: 1.7rem; margin-bottom: 0.5rem; font-size: 0.96rem; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue);
  font-weight: 800;
}
.check-list li.more { color: var(--muted); font-style: italic; }
.check-list li.more::before { content: "…"; }
.plan-closing { text-align: center; max-width: 640px; margin: 3rem auto 0; }
.plan-closing h2 { color: #fff; }
.plan-closing p { color: #c4d2e8; }

/* Services */
.page-hero {
  background: linear-gradient(160deg, var(--navy-2), var(--navy-3));
  color: #fff; padding: 3.5rem 0;
}
.page-hero h1 { color: #fff; }
.page-hero .lede { color: #c4d2e8; max-width: 720px; }
.service-cat { margin-bottom: 3.5rem; }
.service-cat:last-child { margin-bottom: 0; }
.service-cat > h2 { margin-bottom: 0.15em; }
.cat-tag { color: var(--muted); margin-bottom: 1.8rem; font-size: 1.05rem; }
.services-grid { display: grid; gap: 1.5rem; }
.service-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.75rem;
  background: var(--bg); scroll-margin-top: 90px; display: flex; flex-direction: column;
}
.service-card h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 1.1rem 0 0.5rem; }
.service-top { margin-bottom: 0.4rem; }
.service-top h3 { margin-bottom: 0.15rem; }
.price { font-size: 1.25rem; font-weight: 800; color: var(--blue-dark); margin: 0; }
.price-note { display: block; font-size: 0.85rem; font-weight: 500; color: var(--muted); }
.best-for { margin: 0.6rem 0 0; }
.service-card .check-list { margin: 0.4rem 0 1.2rem; }
.service-card .btn { margin-top: auto; align-self: flex-start; }
.tags { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.4rem 0 1.2rem; }
.tag { background: var(--bg-alt); border: 1px solid var(--line); font-size: 0.85rem; font-weight: 600; padding: 0.25rem 0.7rem; border-radius: 999px; color: var(--ink); }

/* About */
.about-grid { display: grid; gap: 2.5rem; align-items: start; }
.about-grid p { color: var(--muted); }
.about-meta { margin-top: 1.5rem; border-top: 1px solid var(--line); padding-top: 1.2rem; display: grid; gap: 0.8rem; }
.about-meta > div { display: grid; grid-template-columns: 130px 1fr; gap: 1rem; }
.about-meta dt { font-weight: 700; color: var(--navy); }
.about-meta dd { margin: 0; color: var(--muted); }

/* Contact */
.contact-grid { display: grid; gap: 2.5rem; align-items: start; }
.inquiry-form { display: grid; gap: 1.1rem; }
.field-row { display: grid; gap: 1.1rem; }
.field { display: grid; gap: 0.4rem; }
.field label { font-weight: 600; font-size: 0.95rem; color: var(--navy); }
.field .req { color: #c2410c; }
.field .opt { font-weight: 400; color: var(--muted); font-size: 0.85rem; }
.field input, .field select, .field textarea {
  font: inherit; color: var(--ink);
  border: 1px solid #c9d4e6; border-radius: 8px;
  padding: 0.7rem 0.9rem; background: #fff; width: 100%;
}
.field textarea { resize: vertical; min-height: 7rem; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue);
}
.field input:disabled { background: var(--bg-alt); }
.inquiry-form .btn { justify-self: start; }
.inquiry-form .btn:disabled { opacity: 0.65; cursor: wait; transform: none; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { border-radius: 8px; padding: 0; }
.form-status.ok, .form-status.err { padding: 1rem 1.25rem; border: 1px solid; }
.form-status.ok { background: #ecfdf5; border-color: #6ee7b7; color: #065f46; }
.form-status.err { background: #fef2f2; border-color: #fca5a5; color: #991b1b; }
.form-status-heading { font-weight: 700; margin: 0 0 0.25rem; }
.form-status p:last-child { margin: 0; }
.contact-side { display: grid; gap: 1.25rem; }
.side-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; background: var(--bg-alt); }
.side-card h3 { margin-bottom: 0.5rem; }
.cities { font-size: 0.9rem; color: var(--muted); margin: 0.8rem 0 0; }
.steps { margin: 0; padding-left: 1.3rem; color: var(--muted); }
.steps li { margin-bottom: 0.6rem; }

/* CTA band */
.cta-band {
  background:
    radial-gradient(700px 320px at 50% 0%, rgba(37, 99, 235, 0.3), transparent 65%),
    linear-gradient(160deg, var(--navy-2), var(--navy-3));
  color: #fff; text-align: center; padding: 4rem 0;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #c4d2e8; max-width: 640px; margin: 0 auto; }
.cta-band .btn-row { justify-content: center; margin-top: 1.8rem; }

/* Footer */
.site-footer { background: var(--navy-3); color: #aebdd6; padding: 3.5rem 0 0; font-size: 0.95rem; }
.site-footer .brand-name { color: #fff; }
.footer-grid { display: grid; gap: 2rem; padding-bottom: 2.5rem; }
.site-footer h3 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 0.55rem; }
.site-footer a { color: #aebdd6; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-brand p { margin-top: 0.8rem; }
.footer-contact li { margin-bottom: 0.4rem; }
.footer-brand .btn { margin-top: 1rem; }
.footer-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 1.4rem 0;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: 0.88rem;
}
.legal-links { display: flex; gap: 1.4rem; }

/* Reveal animation (subtle) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover { transform: none; }
}

/* Responsive */
@media (min-width: 720px) {
  .help-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
  .industries-teaser { grid-template-columns: 1fr 1fr; }
  .help-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid .why-item:nth-child(4) { grid-column: 1 / 2; }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .plans-grid { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1.05fr 0.95fr; }
  .contact-grid { grid-template-columns: 1.5fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
  .section { padding: 5.5rem 0; }
}

/* Mobile nav */
@media (max-width: 899px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(10, 28, 51, 0.14);
    flex-direction: column; align-items: stretch; gap: 0; padding: 0.75rem 1.25rem 1.25rem;
  }
  .site-nav.open .nav-menu { display: flex; }
  .nav-menu ul { flex-direction: column; gap: 0; }
  .nav-menu ul a { display: block; padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
  .nav-menu ul a[aria-current="page"] { border-bottom: 1px solid var(--line); }
  .nav-meta { flex-direction: row; justify-content: space-between; padding-top: 1rem; }
  .site-nav { position: static; }
  .site-header .container { position: relative; }
  .btn-row .btn { flex: 1 1 100%; }
  .hero { padding: 3rem 0; }
}