:root {
  --blue: #2f6fe0;
  --blue-soft: #4c8bf5;
  --blue-pale: #eaf3ff;
  --blue-line: #d7e6ff;
  --ink: #1f2a37;
  --title: #17345f;
  --muted: #6b7c93;
  --bg: #ffffff;
  --bg-soft: #f7faff;
  --panel: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(47, 111, 224, 0.08);
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --nav-h: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: #1f2a37 !important;
  font-family: var(--font);
  background: #ffffff !important;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
h1, h2, h3 { margin: 0; color: #17345f !important; letter-spacing: -0.02em; }
h1 { font-size: clamp(32px, 4.6vw, 46px); line-height: 1.2; font-weight: 800; }
h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.3; font-weight: 750; }
h3 { font-size: 18px; line-height: 1.4; font-weight: 700; }
.lead {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 640px;
}
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 clamp(16px, 4vw, 40px);
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid #eef2f7;
  backdrop-filter: blur(12px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(47, 111, 224, 0.12);
}
.brand strong {
  display: block;
  color: var(--blue);
  font-size: 16px;
  font-weight: 700;
}
.brand small {
  display: block;
  margin-top: 1px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.main-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: #334155 !important;
  font-size: 14px;
  font-weight: 500;
}
.main-nav a:hover,
.main-nav a.is-active {
  color: var(--blue);
  background: var(--blue-pale);
}
.header-actions { display: flex; align-items: center; gap: 8px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid #e6ebf2;
  border-radius: 8px;
  background: #fff;
  padding: 9px;
  margin-left: auto;
}
.nav-toggle span {
  display: block; height: 2px; margin: 5px 0;
  background: var(--ink); border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .15s, border-color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 8px 18px rgba(47, 111, 224, 0.22);
}
.btn-outline {
  background: #fff;
  color: var(--blue);
  border-color: #b7d0fb;
}
.btn-outline:hover { background: var(--blue-pale); }
.btn-ghost {
  background: transparent;
  color: #445066;
  border-color: #e6ebf2;
}

/* hero */
.hero {
  background:
    radial-gradient(700px 320px at 85% 20%, rgba(76,139,245,0.12), transparent 60%),
    linear-gradient(180deg, #f4f8ff 0%, #ffffff 100%);
  padding: 48px 0 28px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
}
.hero h1 { color: #2f6fe0 !important; }
.hero-text {
  margin: 16px 0 0;
  color: #5b6b7f !important;
  font-size: 15px;
  line-height: 1.85;
  max-width: 34em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.hero-art {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--blue-line);
  box-shadow: var(--shadow);
  background: #eef5ff;
  min-height: 320px;
}
.hero-art img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}
.hero-art svg { width: 100%; height: auto; }

.shot {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid #e8eef6;
  background: #f4f8ff;
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.shot-lg { min-height: 240px; }
.shot-md { height: 160px; }
.shot-sm { height: 120px; }

.feature {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
  align-items: center;
  margin-bottom: 22px;
}
.feature.reverse { grid-template-columns: 1.05fr 0.95fr; }
.feature.reverse .feature-copy { order: 2; }
.feature-copy {
  background: #fff;
  border: 1px solid #e8eef6;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 16px rgba(23, 52, 95, 0.03);
}

.media-card { padding: 0; overflow: hidden; }
.media-card .shot { border: 0; border-radius: 0; }
.media-card .body { padding: 18px 18px 20px; }

/* sections */
.section { padding: 72px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { margin-bottom: 36px; }
.section-head.row {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
}

.page-hero {
  padding: 48px 0 24px;
  background: linear-gradient(180deg, #f4f8ff 0%, #ffffff 100%);
}
.page-hero .panel {
  padding: 28px 32px;
  border: 1px solid var(--blue-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow);
}

.grid-5, .grid-4, .grid-3, .grid-2 {
  display: grid;
  gap: 18px;
}
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--panel);
  border: 1px solid #e8eef6;
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: 0 4px 16px rgba(23, 52, 95, 0.03);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.card:hover {
  border-color: #c9dbfb;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.card ul { margin-top: 12px; }
.card li {
  position: relative;
  padding-left: 14px;
  margin: 7px 0;
  color: #445066;
  font-size: 13px;
}
.card li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-soft);
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  background: var(--blue-pale);
  color: var(--blue);
}
.icon svg { width: 22px; height: 22px; }

.pain .icon { background: linear-gradient(180deg, #4c8bf5, #2f6fe0); color: #fff; }

.metric-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.metric {
  text-align: center;
  padding: 18px 12px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--blue-line);
}
.metric b {
  display: block;
  color: var(--blue);
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 4px;
}
.metric span { color: var(--muted); font-size: 13px; }

.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}
.step {
  background: #fff;
  border: 1px solid #e8eef6;
  border-radius: var(--radius);
  padding: 20px 16px;
}
.step-index {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid; place-items: center;
  margin-bottom: 12px;
  background: var(--blue-pale);
  color: var(--blue);
  font-weight: 750;
  font-size: 13px;
}
.step h3 { font-size: 16px; margin-bottom: 8px; }
.step p { margin: 0; color: var(--muted); font-size: 13px; }

.tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--blue-pale);
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
}
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid #eef2f7;
  color: var(--muted);
  font-size: 12px;
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}
.panel {
  background: #fff;
  border: 1px solid #e8eef6;
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.stat-item {
  padding: 14px 0;
  border-bottom: 1px solid #eef2f7;
}
.stat-item:last-child { border-bottom: 0; }
.stat-item b {
  display: block;
  color: var(--blue);
  font-size: 22px;
  margin-bottom: 2px;
}
.stat-item span { color: var(--muted); font-size: 13px; }

.faq details {
  background: #fff;
  border: 1px solid #e8eef6;
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--title);
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq details p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }

.contact-form { display: grid; gap: 12px; }
.contact-form label {
  display: grid; gap: 6px;
  font-size: 13px; font-weight: 600; color: #445066;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid #e6ebf2;
  border-radius: 10px;
  padding: 11px 12px;
  background: #fff;
  outline: none;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: #9cbcf0;
  box-shadow: 0 0 0 3px rgba(47,111,224,0.12);
}
.form-tip { min-height: 20px; margin: 0; color: var(--blue); font-size: 13px; }
.contact-meta p { margin: 10px 0; color: var(--muted); font-size: 14px; }
.contact-meta strong {
  display: inline-block;
  min-width: 72px;
  color: var(--title);
}

.cta-band {
  margin-top: 8px;
  padding: 28px 32px;
  border-radius: 18px;
  background: linear-gradient(135deg, #2f6fe0, #4c8bf5);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: 0 16px 36px rgba(47, 111, 224, 0.25);
}
.cta-band h2, .cta-band p { color: #fff; }
.cta-band p { margin: 8px 0 0; opacity: 0.9; }
.cta-band .btn-outline {
  background: #fff;
  border-color: #fff;
}

.site-footer {
  border-top: 1px solid #eef2f7;
  background: #fbfcfe;
  padding: 36px 0 40px;
  color: var(--muted);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.footer-brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.footer-brand img {
  width: 36px; height: 36px; border-radius: 8px;
}
.footer-brand strong {
  display: block;
  color: var(--blue);
  margin-bottom: 6px;
}
.footer-brand p, .site-footer p { margin: 0; font-size: 13px; }
.footer-col h4 {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--title);
}
.footer-col a {
  display: block;
  margin: 6px 0;
  font-size: 13px;
  color: var(--muted);
}
.footer-col a:hover { color: var(--blue); }
.footer-copy {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid #eef2f7;
  font-size: 12px;
}

@media (max-width: 980px) {
  .hero-grid, .split, .footer-grid, .feature, .feature.reverse { grid-template-columns: 1fr; }
  .feature.reverse .feature-copy { order: 0; }
  .page-hero .panel { grid-template-columns: 1fr !important; }
  .grid-5, .grid-4, .metric-bar { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
  .main-nav, .header-actions { display: none; }
  .nav-toggle { display: block; }
  .site-header.is-open .main-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    left: 12px; right: 12px;
    top: calc(var(--nav-h) + 8px);
    padding: 10px;
    background: #fff;
    border: 1px solid #e8eef6;
    border-radius: 12px;
    box-shadow: var(--shadow);
  }
  .site-header.is-open .header-actions {
    display: flex;
    position: absolute;
    left: 12px; right: 12px;
    top: calc(var(--nav-h) + 300px);
    background: #fff;
    border: 1px solid #e8eef6;
    border-radius: 12px;
    padding: 10px;
  }
}

@media (max-width: 640px) {
  .grid-5, .grid-4, .grid-3, .grid-2, .steps, .metric-bar { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
}