:root {
  --bg-top: #f6f8ff;
  --bg-mid: #ffffff;
  --bg-bottom: #fff5fb;
  --hero-top: #e8edff;
  --hero-bottom: #ffe5f3;
  --panel: #ffffff;
  --panel-strong: #f8f3ff;
  --primary: #3450ff;
  --secondary: #ff6cbf;
  --text: #141831;
  --muted: #5a6078;
  --border: rgba(20, 24, 49, 0.1);
  --radius: 20px;
  --gradient: linear-gradient(120deg, #3450ff, #6a5bff, #ff74cf);
  font-size: 16px;
}

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

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, var(--bg-top), var(--bg-mid) 45%, var(--bg-bottom));
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.eyebrow {
  letter-spacing: 0.27em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.75em;
  line-height: 1.2;
}

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s, background 0.2s, color 0.2s;
}

.btn.primary {
  background: #3450ff;
  color: #fff;
  box-shadow: 0 12px 25px rgba(52, 80, 255, 0.35);
}

.btn.ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-1px) scale(1.01);
}

.btn.primary:hover {
  background: #2b46e6;
}

.btn-link {
  border: 1px solid var(--border);
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  background: transparent;
  color: var(--text);
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  z-index: 10;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.logo img {
  height: 32px;
  width: auto;
  display: block;
}

.logo-text {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(20, 24, 49, 0.85);
  display: inline-flex;
  align-items: center;
  position: relative;
  padding-left: 0.75rem;
}

.logo-text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 70%;
  background: rgba(20, 24, 49, 0.18);
}

.logo-dot {
  color: var(--primary);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--muted);
  transition: color 0.2s;
}

.main-nav a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 0;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  display: block;
}

.hero {
  color: var(--text);
  padding: 6rem 0 4rem;
  background: linear-gradient(180deg, var(--hero-top), var(--hero-bottom));
  border-bottom: 1px solid rgba(58, 88, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.hero p {
  color: rgba(27, 31, 54, 0.7);
}

.hero .hero-metrics .label {
  color: rgba(27, 31, 54, 0.56);
}

.hero-card {
  color: var(--text);
}

.hero-card .sub {
  color: var(--muted);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.hero-card,
.coverage-card,
.download-card,
.testimonial,
.faq article,
.feature-grid article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 12px 30px rgba(27, 31, 54, 0.08);
}

.hero-card {
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.hero-metrics {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  gap: 2rem;
}

.metric {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: #17c293;
  margin: 1rem 0;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3cff8f;
  animation: pulse 1.4s ease infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.9);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
  100% {
    transform: scale(0.9);
    opacity: 0.8;
  }
}

.hero-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-card-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-card-list .label {
  font-weight: 600;
}

.hero-card-list .sub {
  font-size: 0.85rem;
  color: var(--muted);
}

.value {
  font-weight: 600;
}

.value.positive {
  color: #5ef8c2;
}

.value.neutral {
  color: #f5d377;
}

.trust,
.features,
.coverage,
.how-it-works,
.stories,
.download,
.faq {
  padding: 4rem 0;
  background: transparent;
}

.trust > .container,
.features > .container,
.coverage > .container,
.how-it-works > .container,
.stories > .container,
.download > .container,
.faq > .container {
  background: #ffffff;
  border-radius: 32px;
  padding: 3rem clamp(1.5rem, 5vw, 3.5rem);
  box-shadow: 0 25px 60px rgba(20, 24, 49, 0.08);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: center;
}

.trust-metrics {
  list-style: none;
  padding: 1.5rem 0 0;
  margin: 1.5rem 0 0;
  border-top: 1px solid rgba(20, 24, 49, 0.08);
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.trust-metrics .metric {
  color: var(--primary);
  font-size: 1.75rem;
}

.trust-metrics .label {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.trust-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.trust-card {
  padding: 1.25rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(52, 80, 255, 0.08), rgba(255, 116, 207, 0.08));
  border: 1px solid rgba(52, 80, 255, 0.15);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.trust-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--text);
}

.trust-card p {
  margin: 0;
  color: var(--muted);
}

.features {
  padding: 4rem 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.feature-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.coverage {
  padding: 4rem 0;
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.coverage-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.coverage-list li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.coverage-card canvas {
  margin-top: 1.5rem;
  border-radius: 12px;
  background: rgba(58, 88, 255, 0.08);
}

.how-it-works {
  padding: 4rem 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--panel-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.stories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.testimonial blockquote {
  margin: 0;
}

.testimonial-text {
  font-size: 1.05rem;
  color: var(--text);
  min-height: 5rem;
}

.testimonial footer {
  margin-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--muted);
}

.testimonial-controls {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.testimonial-controls button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.download-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.download-badges img {
  height: 44px;
}

.download-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.download-stat ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.download-stat li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 0.75rem;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.site-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 3rem 0 1.5rem;
  background: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--muted);
}

.footer-grid li {
  margin-bottom: 0.4rem;
}

.copyright {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  margin-top: 2rem;
  padding-top: 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .main-nav ul {
    position: absolute;
    top: 70px;
    right: 16px;
    flex-direction: column;
    background: var(--panel);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: none;
  }

  .main-nav ul.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-metrics {
    flex-wrap: wrap;
    gap: 1rem;
  }
}