:root {
  --bg: #ffffff;
  --bg-muted: #f5f5f7;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --brand: #0071e3;
  --brand-hover: #0077ed;
  --dark: #000000;
  --radius-xl: 36px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-xl: 0 32px 80px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 18px 42px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "SF Pro Display", "PingFang SC", "Helvetica Neue", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

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

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(20px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(210, 210, 215, 0.65);
}

.nav {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand img {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.nav-links {
  display: inline-flex;
  gap: 22px;
  color: #424245;
  font-size: 13px;
}

.nav-links a:hover {
  color: #000;
}

.hero {
  position: relative;
  padding: 72px 0 56px;
  overflow: hidden;
  background: linear-gradient(180deg, #fbfbfc 0%, #f6f6f8 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(29, 29, 31, 0.028) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(-45deg, rgba(29, 29, 31, 0.02) 0 1px, transparent 1px 18px);
  opacity: 0.22;
  pointer-events: none;
}

.hero-center {
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(44px, 7vw, 92px);
  font-weight: 700;
}

.lead {
  margin: 20px auto 0;
  max-width: 780px;
  font-size: clamp(19px, 2.5vw, 28px);
  color: var(--muted);
  line-height: 1.36;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  justify-content: center;
}

.hero-more-wrap {
  margin-top: 8px;
  display: flex;
  justify-content: center;
}

.hero-more {
  min-height: 34px;
  font-size: 15px;
}

.note {
  margin-top: 14px;
  font-size: 13px;
  color: #8a8a90;
}

.hero-strip-wrap {
  margin-top: 54px;
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.hero-strip {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  overflow-y: hidden;
  width: 100%;
  padding: 8px max(20px, calc((100vw - 1180px) / 2)) 18px;
  scroll-snap-type: x mandatory;
  cursor: grab;
}

.hero-strip:active {
  cursor: grabbing;
}

.hero-strip::-webkit-scrollbar {
  height: 8px;
}

.hero-strip::-webkit-scrollbar-thumb {
  background: #d5d5db;
  border-radius: 999px;
}

.strip-item {
  flex: 0 0 min(340px, 82vw);
  width: min(340px, 82vw);
  border-radius: 24px;
  scroll-snap-align: start;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
  border: 1px solid #e4e4e9;
}

.hero-badge img {
  width: min(180px, 52vw);
}

.section {
  padding: 96px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 34px;
}

.section-sub {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 18px;
}

h2 {
  font-size: clamp(34px, 4.4vw, 70px);
  font-weight: 700;
}

.dark-block {
  background: var(--dark);
  color: #f5f5f7;
}

.highlight-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.highlight-copy h2 {
  font-size: clamp(34px, 5vw, 72px);
}

.highlight-copy p {
  margin: 16px 0 0;
  font-size: clamp(18px, 2.1vw, 26px);
  line-height: 1.4;
  color: #a1a1a6;
  max-width: 860px;
}

.highlight-media img {
  width: 100%;
  border-radius: 30px;
  display: block;
  box-shadow: var(--shadow-md);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  background: #fff;
}

.feature-card h3 {
  font-size: clamp(24px, 2.1vw, 32px);
  font-weight: 600;
}

.feature-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.metrics {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metrics > div {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
}

.metric-value {
  margin: 0;
  font-size: clamp(27px, 3vw, 40px);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.metric-label {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.review-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: #fff;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 650;
  color: #fff;
  background: linear-gradient(135deg, #636366, #2c2c2e);
}

.review-name {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.review-meta {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.review-card h3 {
  margin-top: 14px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.review-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.download-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  text-align: center;
  padding: 22px 24px 16px;
}

.download-badge {
  display: inline-flex;
}

.download-badge img {
  width: min(220px, 62vw);
  height: auto;
  display: block;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  padding: 0 22px;
  font-size: 17px;
  font-weight: 500;
}

.btn-primary {
  color: #fff;
  background: var(--brand);
}

.btn-primary:hover {
  background: var(--brand-hover);
}

.btn-link {
  color: var(--brand);
  min-height: 42px;
}

.btn-link:hover {
  color: var(--brand-hover);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 18px 0 20px;
  background: var(--bg-muted);
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #6e6e73;
  font-size: 12px;
}

.footer-links {
  display: inline-flex;
  gap: 18px;
}

.footer-links a:hover {
  color: #1d1d1f;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

@media (max-width: 1024px) {
  .feature-grid,
  .metrics {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 56px;
  }

  .hero-strip-wrap {
    margin-top: 42px;
  }

  .hero-strip {
    gap: 14px;
    padding: 8px 14px 16px;
  }

  .section {
    padding: 72px 0;
  }

  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}