:root {
  --violet: #6b62fe;
  --violet-dark: #4b41d8;
  --violet-soft: rgba(107, 98, 254, 0.12);
  --orange: #ff6b00;
  --teal: #0f766e;
  --green: #07c160;
  --green-soft: #ecfdf5;
  --green-border: #a7f3d0;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #edf2f9;
  --bg-alt: #f6f7fa;
  --card: #ffffff;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--violet-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.container-narrow {
  width: min(100% - 32px, 760px);
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--violet), #8b5cf6);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 20px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 18px;
  color: #2c3140;
}

.brand-text em {
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
  color: var(--violet);
}

.brand-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--violet-dark);
  background: var(--violet-soft);
  padding: 4px 10px;
  border-radius: 8px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  color: var(--text-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--violet-dark);
  text-decoration: none;
}

.nav-cta {
  background: var(--violet) !important;
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  margin: 6px 0;
  border-radius: 2px;
}

/* Hero */
.hero {
  padding: 56px 0 40px;
  background: linear-gradient(180deg, #edf2f9 0%, #f6f7fa 55%, #f5f7fa 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--violet-soft);
  color: var(--violet-dark);
  font-size: 13px;
  font-weight: 600;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.15;
  color: #2c3140;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(90deg, var(--violet), #8b5cf6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 0 24px;
  font-size: 17px;
  color: var(--text-muted);
  max-width: 520px;
}

.hero-lead strong {
  color: var(--violet-dark);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.tag {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.tag-violet {
  background: var(--violet-soft);
  color: var(--violet-dark);
}

.tag-orange {
  background: rgba(255, 107, 0, 0.12);
  color: #c2410c;
}

.tag-teal {
  background: rgba(15, 118, 110, 0.12);
  color: var(--teal);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--violet), #7c3aed);
  color: #fff;
  box-shadow: 0 10px 24px rgba(107, 98, 254, 0.35);
}

.btn-ghost {
  background: #fff;
  color: var(--violet-dark);
  border: 1px solid rgba(107, 98, 254, 0.25);
}

/* Phone mock */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-glow {
  position: absolute;
  inset: 10% 0;
  background: radial-gradient(circle, rgba(107, 98, 254, 0.18), transparent 70%);
  pointer-events: none;
}

.phone-mock {
  position: relative;
  width: min(100%, 300px);
  background: #111827;
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow);
  z-index: 1;
}

.phone-notch {
  width: 96px;
  height: 22px;
  background: #111827;
  border-radius: 0 0 14px 14px;
  margin: 0 auto 8px;
}

.phone-screen {
  background: linear-gradient(180deg, #edf2f9, #f5f7fa);
  border-radius: 28px;
  padding: 16px 14px 20px;
  min-height: 420px;
}

.mock-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 14px;
}

.mock-header span {
  font-weight: 900;
  font-size: 18px;
}

.mock-header small {
  color: var(--violet);
  font-weight: 700;
  font-size: 11px;
}

.mock-hero-card {
  display: flex;
  gap: 12px;
  background: #fff;
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  margin-bottom: 14px;
}

.mock-logo {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--violet), #8b5cf6);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
  flex-shrink: 0;
}

.mock-title {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
}

.mock-sub {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.mock-cta {
  background: linear-gradient(135deg, #6b62fe, #7c3aed);
  color: #fff;
  text-align: center;
  padding: 14px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
}

.mock-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.mock-tip {
  background: linear-gradient(135deg, #f5f3ff, #ede9fe);
  color: var(--violet-dark);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  padding: 12px;
  border-radius: 12px;
}

/* Strip */
.strip {
  background: #fff;
  border-top: 1px solid rgba(15, 23, 42, 0.05);
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 28px 0;
}

.strip-item {
  text-align: center;
}

.strip-item strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}

.strip-item span {
  font-size: 13px;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 36px);
  color: #2c3140;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.feature-icon.violet { background: var(--violet-soft); }
.feature-icon.orange { background: rgba(255, 107, 0, 0.12); }
.feature-icon.teal { background: rgba(15, 118, 110, 0.12); }
.feature-icon.green { background: rgba(7, 193, 96, 0.12); }

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  max-width: 760px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: #fff;
  padding: 24px 28px;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--violet), #8b5cf6);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* Trust */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.trust-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.trust-highlight {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
  border-color: rgba(107, 98, 254, 0.2);
}

.trust-ico {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--green-soft);
  border: 2px solid var(--green-border);
  display: grid;
  place-items: center;
  font-size: 20px;
  margin-bottom: 14px;
}

.trust-highlight .trust-ico {
  background: var(--violet-soft);
  border-color: rgba(107, 98, 254, 0.25);
}

.trust-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.trust-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: #fff;
  border-radius: 12px;
  padding: 4px 20px;
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 16px 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.65;
}

/* CTA */
.cta-section {
  padding-bottom: 88px;
}

.cta-box {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  background: linear-gradient(135deg, #2c3140 0%, #1e293b 100%);
  color: #fff;
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow);
}

.cta-content h2 {
  margin: 0 0 12px;
  font-size: 32px;
}

.cta-content p {
  margin: 0 0 20px;
  color: rgba(255, 255, 255, 0.82);
}

.cta-tips {
  margin: 0 0 24px;
  padding-left: 20px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}

.cta-tips li {
  margin-bottom: 6px;
}

.cta-contact a {
  color: #c4b5fd;
}

.cta-contact .muted {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.qr-frame {
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  text-align: center;
}

.qr-placeholder {
  aspect-ratio: 1;
  border: 2px dashed #cbd5e1;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  background: #f8fafc;
}

.qr-logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--violet), #8b5cf6);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 28px;
  font-weight: 900;
}

.qr-placeholder p {
  margin: 0;
  font-weight: 700;
  color: var(--text);
}

.qr-placeholder small {
  font-size: 12px;
}

.qr-note {
  margin: 12px 0 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.5;
}

.qr-note code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Footer */
.site-footer {
  background: #fff;
  border-top: 1px solid rgba(15, 23, 42, 0.06);
  padding: 32px 0;
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand span {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--violet-dark);
}

.footer-copy {
  width: 100%;
  margin: 8px 0 0;
  font-size: 12px;
  color: #94a3b8;
  text-align: center;
  line-height: 1.8;
}

.footer-copy a {
  color: #94a3b8;
  text-decoration: none;
}

.footer-copy a:hover {
  color: var(--violet-dark);
  text-decoration: underline;
}

.footer-sep {
  margin: 0 6px;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .trust-grid,
  .cta-box,
  .strip-inner {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .trust-highlight {
    grid-column: auto;
  }
}

@media (max-width: 720px) {
  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    padding: 16px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .feature-grid,
  .strip-inner,
  .trust-grid,
  .cta-box {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: 32px 24px;
  }

  .section {
    padding: 56px 0;
  }
}