:root {
  --bg: #0b1120;
  --bg-soft: #10182d;
  --surface: #ffffff;
  --surface-soft: #f5f7fb;
  --primary: #2b6cff;
  --primary-dark: #1f52c7;
  --text: #1a2340;
  --text-light: #5c6785;
  --border: rgba(18, 34, 66, 0.08);
  --shadow: 0 20px 40px rgba(18, 34, 66, 0.12);
  --radius: 22px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef4ff 0%, #ffffff 25%, #f7f9fd 100%);
  line-height: 1.6;
}

.domain-blocked body {
  background: linear-gradient(135deg, #091224 0%, #12254f 100%);
}

.domain-blocked body > * {
  display: none;
}

.domain-blocked .domain-guard {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.domain-guard-card {
  width: min(100%, 540px);
  padding: 2rem;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 48px rgba(6, 18, 42, 0.24);
  text-align: center;
}

.domain-guard-card h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-muted {
  background: rgba(255, 255, 255, 0.72);
}

.section-dark {
  background: linear-gradient(135deg, #0c1530 0%, #16244f 100%);
  color: #ffffff;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(43, 108, 255, 0.12);
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.section-dark .eyebrow {
  background: rgba(255, 255, 255, 0.12);
  color: #9db8ff;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-heading.align-left {
  margin-left: 0;
  text-align: left;
}

.section-heading h1,
.section-heading h2,
.hero-copy h1,
.contact-copy h2 {
  margin: 16px 0;
  line-height: 1.15;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  letter-spacing: -0.04em;
}

.section-heading h2,
.contact-copy h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.03em;
}

.section-heading p,
.hero-text,
.contact-copy p,
.service-card p,
.scene-card p,
.feature-item p,
.timeline-item p,
.faq-list p,
.contact-list p,
.form-note {
  color: var(--text-light);
  margin: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(18, 34, 66, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 82px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #63a5ff);
  color: #ffffff;
  font-weight: 800;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text small {
  color: var(--text-light);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-weight: 500;
}

.site-nav a {
  color: var(--text-light);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.nav-cta {
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  background: var(--primary);
  color: #ffffff !important;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: #eef4ff;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.hero {
  padding: 56px 0 72px;
}

.hero-grid,
.advantages-grid,
.contact-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  align-items: center;
}

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

.contact-copy {
  max-width: 760px;
}

.contact-list {
  display: grid;
  gap: 0.55rem;
}

.contact-list a {
  color: var(--primary);
  font-weight: 600;
}

.contact-list a:hover,
.contact-list a:focus-visible {
  color: var(--primary-dark);
  text-decoration: underline;
}

.wechat-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.75rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  box-shadow: 0 12px 28px rgba(17, 30, 66, 0.06);
}

.wechat-qr {
  width: 148px;
  min-width: 148px;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(18, 34, 66, 0.08);
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(17, 30, 66, 0.08);
}

.wechat-qr img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.wechat-copy p {
  color: var(--text-light);
}

.wechat-copy h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
}

.wechat-copy p {
  margin: 0;
}

.hero-copy {
  padding: 2rem 0;
}

.hero-text {
  max-width: 620px;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.95rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--primary), #69a3ff);
  color: #ffffff;
  box-shadow: 0 16px 30px rgba(43, 108, 255, 0.25);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(43, 108, 255, 0.16);
  color: var(--text);
}

.button-block {
  width: 100%;
}

.hero-points {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-light);
}

.hero-points li::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #78b0ff);
  flex: 0 0 auto;
}

.hero-card {
  position: relative;
}

.hero-panel {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
}

.panel-title {
  margin: 0 0 1rem;
  font-weight: 700;
  color: var(--text-light);
}

.issue-list {
  display: grid;
  gap: 1rem;
}

.issue-list article,
.service-card,
.scene-card,
.feature-item,
.timeline-item,
.stat-item {
  border-radius: var(--radius);
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: 0 12px 28px rgba(17, 30, 66, 0.06);
}

.issue-list article {
  padding: 1.25rem;
}

.issue-list h3,
.service-card h3,
.scene-card h3,
.feature-item h3,
.timeline-item h3 {
  margin: 0 0 0.65rem;
  font-size: 1.15rem;
}

.issue-list p {
  margin: 0;
  color: var(--text-light);
}

.panel-highlight {
  margin-top: 1.25rem;
  padding: 1.15rem 1.25rem;
  border-radius: 18px;
  background: linear-gradient(135deg, #edf4ff, #f7fbff);
}

.panel-highlight strong {
  display: block;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--primary);
}

.stats {
  padding-top: 0;
}

.stats-grid,
.card-grid,
.scene-grid,
.feature-list,
.timeline {
  display: grid;
  gap: 1.25rem;
}

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

.stat-item {
  padding: 1.5rem;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 1.8rem;
  color: var(--primary);
}

.stat-item span {
  color: var(--text-light);
}

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

.service-card,
.scene-card,
.feature-item {
  padding: 1.7rem;
}

.service-icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border-radius: 16px;
  background: rgba(43, 108, 255, 0.1);
  color: var(--primary);
  font-weight: 800;
}

.feature-list,
.timeline {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.timeline-item {
  padding: 1.6rem;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.timeline-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: #9db8ff;
  font-weight: 800;
}

.section-dark .timeline-item p,
.section-dark .timeline-item h3 {
  color: rgba(255, 255, 255, 0.88);
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-list details {
  padding: 1.25rem 1.35rem;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid var(--border);
}

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

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

.faq-list p {
  margin-top: 0.85rem;
}

.site-footer {
  padding: 1.4rem 0;
  background: #0a1228;
  color: rgba(255, 255, 255, 0.74);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 1024px) {
  .stats-grid,
  .services-grid,
  .scene-grid,
  .feature-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .advantages-grid,
  .contact-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding-bottom: 0;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .header-inner {
    min-height: 74px;
  }

  .nav-toggle {
    display: inline-block;
    position: relative;
    z-index: 120;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 1rem;
    left: 1rem;
    display: grid;
    gap: 0.4rem;
    padding: 1rem;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(18, 34, 66, 0.08);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 0.8rem 0.9rem;
    border-radius: 14px;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: #f4f7fd;
  }

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

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .stats-grid,
  .services-grid,
  .scene-grid,
  .feature-list,
  .timeline {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .wechat-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .wechat-qr {
    width: 100%;
    min-width: 0;
    max-width: 220px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(calc(100% - 1.25rem), var(--container));
  }

  .hero-panel,
  .service-card,
  .scene-card,
  .feature-item,
  .timeline-item,
  .faq-list details,
  .stat-item {
    padding: 1.25rem;
  }

  .hero-copy h1 {
    font-size: 2.2rem;
  }
}