:root {
  --bg: #f5f8ff;
  --card: #ffffff;
  --ink: #102043;
  --muted: #5f6f95;
  --brand: #2050ff;
  --brand-strong: #0a1e9e;
  --line: #dfe6ff;
  --ok: #0f9d58;
  --shadow: 0 12px 36px rgba(16, 32, 67, 0.12);
  --radius: 18px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f8faff 0%, #eef3ff 36%, #f5f8ff 100%);
  line-height: 1.6;
  text-autospace: normal;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--container), calc(100% - 2.2rem));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #fff;
  padding: 0.75rem 1rem;
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
  z-index: 1000;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(32, 80, 255, 0.1);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #4f75ff);
  color: #fff;
  font-size: 0.9rem;
}

.brand-text {
  color: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  font-size: 0.96rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.btn {
  border: 0;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: #fff;
  box-shadow: 0 10px 28px rgba(32, 80, 255, 0.3);
}

.btn-secondary {
  background: #edf2ff;
  color: var(--brand-strong);
  border: 1px solid #cdd8ff;
}

.btn-nav {
  background: var(--ink);
  color: #fff !important;
  padding-inline: 1rem;
}

.menu-toggle {
  display: none;
  width: 2.8rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.3rem;
}

.menu-toggle span {
  display: block;
  width: 1.2rem;
  height: 2px;
  background: var(--ink);
  border-radius: 8px;
}

.hero {
  padding: clamp(3rem, 7vw, 5.4rem) 0 3rem;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
}

.eyebrow {
  color: var(--brand-strong);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 0.7rem;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.9rem, 4.5vw, 3.2rem);
}

h2 {
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
}

.hero-lead {
  margin: 1rem 0 1.4rem;
  color: var(--muted);
  max-width: 58ch;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.hero-metrics div {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem;
}

.hero-metrics strong {
  display: block;
  font-size: 1.3rem;
  color: var(--ink);
}

.hero-metrics span {
  color: var(--muted);
  font-size: 0.86rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.micro-proof {
  margin-top: 0.95rem;
  color: #4f6396;
  font-size: 0.92rem;
}

.hero-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-media figcaption {
  padding: 0.9rem 1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.section {
  padding: clamp(2.2rem, 6vw, 4.5rem) 0;
}

.section-head {
  margin-bottom: 1.35rem;
}

.section-head p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.project-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  box-shadow: var(--shadow);
  min-height: 100%;
}

.project-body {
  padding: 1rem;
}

.project-kicker {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--brand-strong);
  font-weight: 800;
}

.project-body h3 {
  margin: 0.35rem 0 0.45rem;
}

.project-body p {
  color: var(--muted);
  margin: 0 0 0.8rem;
}

.project-body ul {
  margin: 0 0 0.9rem;
  padding-left: 1.05rem;
  color: #344a7a;
}

.project-body li + li {
  margin-top: 0.3rem;
}

.text-link {
  color: var(--brand-strong);
  font-weight: 800;
}

.text-link:hover,
.text-link:focus-visible {
  text-decoration: underline;
}

.section-dark {
  background: linear-gradient(160deg, #0b1b44, #153079);
  color: #fff;
}

.section-dark .section-head p {
  color: #d6defd;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.value-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 0.45rem;
  row-gap: 0.35rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  padding: 1rem;
}

.value-card i {
  flex: 0 0 auto;
  font-size: 1.2rem;
  margin-bottom: 0;
}

.value-card h3 {
  flex: 1 1 auto;
}

.value-card p {
  flex: 1 0 100%;
  margin: 0.5rem 0 0;
  color: #dbe2ff;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid #cad8ff;
  display: grid;
  gap: 1rem;
}

.timeline li {
  margin-left: 0.9rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.5rem;
}

.year {
  display: inline-block;
  font-weight: 800;
  color: var(--brand-strong);
}

.timeline li p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.timeline-cta {
  margin-top: 1.1rem;
}

.faq-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 1.6rem);
}

details {
  border: 1px solid #e2e9ff;
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  background: #fbfcff;
}

details + details {
  margin-top: 0.7rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.section-cta {
  background: linear-gradient(180deg, #eef3ff 0%, #ffffff 100%);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1rem;
  align-items: start;
}

.cta-copy p {
  color: var(--muted);
}

.cta-points {
  margin: 1rem 0;
  padding-left: 1.1rem;
}

.cta-points li + li {
  margin-top: 0.4rem;
}

.contact-assets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.lead-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.lead-form h3 {
  margin-bottom: 0.4rem;
}

.form-tip {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.lead-form label {
  display: block;
  margin: 0.72rem 0 0.3rem;
  font-weight: 700;
  font-size: 0.9rem;
}

.lead-form input,
.lead-form textarea,
.lead-form select {
  width: 100%;
  border: 1px solid #cfd9fa;
  border-radius: 10px;
  padding: 0.7rem 0.75rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.lead-form input:focus,
.lead-form textarea:focus,
.lead-form select:focus {
  outline: 2px solid rgba(32, 80, 255, 0.24);
  border-color: var(--brand);
}

.form-status {
  min-height: 1.2rem;
  margin-top: 0.55rem;
  color: var(--ok);
  font-weight: 600;
  font-size: 0.88rem;
}

.site-footer {
  background: #0b193f;
  color: #dce5ff;
  padding: 1.25rem 0 4.8rem;
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-wrap p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: #dce5ff;
}

.sticky-cta {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0.75rem;
  width: min(95%, 420px);
  background: rgba(11, 25, 63, 0.94);
  backdrop-filter: blur(8px);
  border-radius: 999px;
  padding: 0.45rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  z-index: 70;
}

.sticky-cta a {
  text-align: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.72rem 0.3rem;
  border-radius: 999px;
}

.sticky-cta a:first-child {
  background: linear-gradient(135deg, #2050ff, #0a1e9e);
}

.sticky-cta a:last-child {
  background: rgba(255, 255, 255, 0.16);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .hero-grid,
  .cta-grid {
    grid-template-columns: 1fr;
  }

  .project-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    right: 1.1rem;
    top: 68px;
    width: min(92vw, 330px);
    border-radius: 14px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.65rem;
    gap: 0.35rem;
  }

  .site-nav a {
    padding: 0.6rem 0.72rem;
    border-radius: 10px;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: #edf2ff;
  }

  .site-nav.is-open {
    display: flex;
  }

  .btn-nav {
    margin-top: 0.4rem;
    text-align: center;
  }
}

@media (max-width: 680px) {
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}