:root {
  --bg: #080811;
  --bg-soft: #101223;
  --card: rgba(17, 20, 38, 0.78);
  --card-strong: #13172a;
  --text: #f4f6ff;
  --muted: #b5bdd8;
  --line: rgba(255, 255, 255, 0.08);
  --primary: #8c7bff;
  --primary-soft: rgba(140, 123, 255, 0.16);
  --accent: #ff8ec7;
  --accent-soft: rgba(255, 142, 199, 0.18);
  --shadow: 0 28px 80px rgba(5, 8, 20, 0.45);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: min(1180px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 110px;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(140, 123, 255, 0.3), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 142, 199, 0.18), transparent 24%),
    linear-gradient(180deg, #07070f 0%, #090a14 35%, #070810 100%);
  line-height: 1.7;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.02);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #c6bbff;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 38px;
  height: 1px;
  background: currentColor;
  opacity: 0.8;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-heading h2 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.18;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(8, 8, 17, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-weight: 800;
  letter-spacing: 0.06em;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 0.98rem;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.82rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-menu a {
  color: var(--muted);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.is-active {
  color: var(--text);
}

.nav-cta {
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid rgba(140, 123, 255, 0.24);
  color: var(--text) !important;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.hero {
  padding: 88px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 36px;
  align-items: stretch;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.7rem, 6vw, 5rem);
  line-height: 1.04;
}

.hero-text {
  max-width: 760px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 156px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), #a86bff);
  box-shadow: 0 16px 34px rgba(126, 94, 255, 0.28);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 44px;
}

.hero-metrics article,
.hero-card,
.info-card,
.service-card,
.comparison-card,
.advantage-card,
.timeline-item,
.contact-card,
.faq-list details {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
}

.hero-metrics article {
  padding: 22px;
  border-radius: var(--radius-md);
}

.hero-metrics strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.06rem;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 0.94rem;
}

.hero-panel {
  display: flex;
}

.hero-card {
  position: relative;
  width: 100%;
  padding: 28px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto -10% -40% auto;
  width: 260px;
  height: 260px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(140, 123, 255, 0.32), transparent 68%);
  filter: blur(10px);
}

.hero-card-top {
  position: relative;
  z-index: 1;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.hero-card-top span,
.hero-card-list span,
.contact-meta span {
  color: #cfc9ef;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-card-top strong {
  display: block;
  margin-top: 10px;
  font-size: 1.52rem;
  line-height: 1.35;
}

.hero-card-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.hero-card-list p,
.contact-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.about-grid,
.services-grid,
.advantages-grid {
  display: grid;
  gap: 20px;
}

.about-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.services-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.advantages-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card,
.service-card,
.advantage-card {
  padding: 26px;
  border-radius: var(--radius-md);
}

.info-card h3,
.service-card h3,
.advantage-card h3,
.comparison-copy h3,
.timeline-item h3 {
  margin: 0 0 10px;
  font-size: 1.18rem;
}

.info-card p,
.service-card p,
.advantage-card p,
.comparison-copy p,
.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.comparison-card {
  overflow: hidden;
  border-radius: 24px;
}

.comparison-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--card-strong);
}

.comparison-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comparison-badge {
  position: absolute;
  top: 18px;
  z-index: 2;
  padding: 8px 14px;
  border-radius: 999px;
  backdrop-filter: blur(12px);
  background: rgba(8, 8, 17, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.88rem;
  font-weight: 700;
}

.comparison-badge.before {
  left: 18px;
}

.comparison-badge.after {
  right: 18px;
}

.comparison-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.12));
  transform: translateX(-50%);
  box-shadow: 0 0 24px rgba(255, 255, 255, 0.22);
}

.comparison-divider::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.16);
}

.comparison-copy {
  padding: 24px;
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 24px;
  padding: 24px 26px;
  border-radius: var(--radius-md);
  align-items: start;
}

.timeline-item > span {
  display: inline-grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary-soft), var(--accent-soft));
  color: var(--text);
  font-weight: 800;
  font-size: 1.1rem;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-list details {
  padding: 22px 24px;
  border-radius: 20px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

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

.faq-list p {
  margin: 14px 0 0;
  color: var(--muted);
}

.contact-section {
  padding-top: 20px;
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 28px;
  padding: 32px;
  border-radius: 28px;
}

.contact-card h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 1.16;
}

.contact-meta {
  display: grid;
  gap: 18px;
}

.contact-meta > div {
  padding: 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
}

.contact-qr-card {
  text-align: center;
}

.contact-qr-image {
  width: min(100%, 240px);
  margin: 14px auto 0;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  background: #ffffff;
}

.contact-meta strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
  line-height: 1.55;
}

.site-footer {
  padding: 26px 0 36px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer-inner p,
.footer-inner a {
  margin: 0;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-grid,
  .contact-card,
  .about-grid,
  .services-grid,
  .advantages-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border-radius: 20px;
    background: rgba(8, 8, 17, 0.96);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 10px 0;
  }

  .nav-cta {
    text-align: center;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 76px 0;
  }

  .hero {
    padding-top: 62px;
  }

  .hero-copy h1 {
    font-size: 2.4rem;
  }

  .hero-card,
  .info-card,
  .service-card,
  .advantage-card,
  .timeline-item,
  .contact-card,
  .comparison-copy,
  .faq-list details {
    padding: 20px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .comparison-frame {
    aspect-ratio: 4 / 5;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}