:root {
  --evn-blue: #00558c;
  --evn-blue-dark: #003a63;
  --evn-orange: #f7941d;
  --text-dark: #1a2733;
  --text-muted: #5c6b78;
  --bg-light: #f5f8fa;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text-dark);
  background: #fff;
  line-height: 1.5;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: inherit; }

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid #e6ebef;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  font-size: 14px;
}

.brand-text strong {
  color: var(--evn-blue-dark);
  font-size: 23px;
}

.brand-text span {
  color: var(--evn-orange);
  font-weight: 700;
  font-size: 22px;
}

.hotline {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-decoration: none;
  color: var(--evn-blue-dark);
}

.hotline-label {
  font-size: 16px;
  color: var(--text-muted);
}

.hotline-number {
  font-size: 26px;
  font-weight: 700;
  color: var(--evn-orange);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--evn-blue) 0%, var(--evn-blue-dark) 100%);
  color: #fff;
  padding: 56px 0;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-content { flex: 1 1 420px; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 13px;
  color: var(--evn-orange);
  font-weight: 700;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: 34px;
  line-height: 1.25;
  margin: 0 0 16px;
}

.hero-desc {
  font-size: 16px;
  color: #dceaf3;
  margin: 0 0 28px;
  max-width: 520px;
}

.cta-group {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.qr-caption {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  color: #dceaf3;
}

.qr-thumb {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  background: #fff;
  padding: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #000;
  color: #fff;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.25);
}

.btn-icon { font-size: 20px; }

.btn-text { display: flex; flex-direction: column; font-size: 15px; line-height: 1.2; }
.btn-text small { font-size: 11px; font-weight: 400; opacity: 0.85; }

.btn-light {
  background: #fff;
  color: var(--evn-blue-dark);
}

.hero-visual { flex: 0 0 auto; display: flex; justify-content: center; }

.phone-mock {
  width: 220px;
  height: 320px;
  background: #0d1b2a;
  border-radius: 28px;
  padding: 14px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}

.phone-screen {
  background: #fff;
  border-radius: 18px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--text-dark);
  text-align: center;
  padding: 16px;
}

.cskh-logo {
  width: 160px;
  height: 160px;
  object-fit: contain;
  border-radius: 24px;
}

.cskh-caption {
  margin: 4px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--evn-blue-dark);
  letter-spacing: 1px;
}

/* Section titles */
.section-title {
  text-align: center;
  font-size: 26px;
  color: var(--evn-blue-dark);
  margin: 0 0 36px;
}

/* Steps */
.steps { padding: 60px 0; background: var(--bg-light); }

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px 18px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--evn-orange);
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-card h3 { margin: 0 0 8px; font-size: 16px; color: var(--evn-blue-dark); }
.step-card p { margin: 0; font-size: 14px; color: var(--text-muted); }

/* Video */
.video-section { padding: 60px 0; background: var(--bg-light); }

.video-wrap {
  position: relative;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding-top: 48.4%; /* 16:9 */
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
}

.video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Features */
.features { padding: 60px 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  border: 1px solid #e6ebef;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: box-shadow 0.15s ease;
}

.feature-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,0.08); }

.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { margin: 0 0 8px; font-size: 16px; color: var(--evn-blue-dark); }
.feature-card p { margin: 0; font-size: 14px; color: var(--text-muted); }

/* CTA bottom */
.cta-bottom {
  background: var(--evn-orange);
  color: #fff;
  text-align: center;
  padding: 56px 0;
}

.cta-bottom h2 { margin: 0 0 10px; font-size: 26px; }
.cta-bottom p { margin: 0 0 28px; }

.cta-group-center { justify-content: center; }

/* Footer */
.site-footer {
  background: var(--evn-blue-dark);
  color: #cfe0ec;
  padding: 32px 0;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-inner strong { color: #fff; }
.footer-inner p { margin: 4px 0; }
.footer-inner a { text-decoration: underline; }
.copyright { color: #9ab3c4; font-size: 13px; }

/* Responsive */
@media (max-width: 860px) {
  .step-list { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .hero { padding: 40px 0; }
  .hero h1 { font-size: 26px; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .hotline { align-items: flex-start; }
  .step-list { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .phone-mock { width: 180px; height: 260px; }
}