:root {
  --bg: #f5f8ff;
  --bg-soft: #eef4ff;
  --surface: #ffffff;
  --surface-strong: #f2f7ff;
  --text: #0f172a;
  --text-muted: #4f607c;
  --primary: #0f7bff;
  --primary-strong: #0057d8;
  --accent: #11b8a6;
  --border: rgba(15, 23, 42, 0.14);
  --shadow: 0 20px 45px rgba(15, 44, 94, 0.12);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60vw 45vw at 10% -5%, rgba(17, 184, 166, 0.2), transparent 60%),
    radial-gradient(70vw 50vw at 95% -10%, rgba(15, 123, 255, 0.22), transparent 65%),
    linear-gradient(180deg, #f8fbff 0%, #f2f7ff 100%);
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 999;
  background: #fff;
  color: #000;
  padding: 8px 10px;
  border-radius: 10px;
}

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

.section {
  padding: 88px 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.68);
  border-top: 1px solid rgba(15, 23, 42, 0.06);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.section-head {
  margin-bottom: 30px;
}

.section-tag {
  margin: 0;
  font-weight: 700;
  color: var(--primary-strong);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.section-head h2 {
  margin: 8px 0 0;
  font-size: clamp(1.65rem, 3.2vw, 2.2rem);
  line-height: 1.3;
}

.section-desc {
  margin: 10px 0 0;
  color: var(--text-muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(245, 248, 255, 0.8);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 8px 24px rgba(8, 27, 60, 0.08);
  background: rgba(245, 248, 255, 0.92);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}

.brand-text {
  font-weight: 700;
  font-size: 0.97rem;
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
  padding: 10px 8px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  margin: 4px 0;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-strong);
  background: rgba(15, 123, 255, 0.12);
}

.hero {
  padding: 92px 0 80px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 34px;
}

.hero-eyebrow {
  margin: 0;
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(15, 123, 255, 0.12);
  color: var(--primary-strong);
  font-size: 0.83rem;
  font-weight: 700;
}

.hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--primary-strong);
}

.hero-desc {
  margin: 0;
  color: var(--text-muted);
  max-width: 64ch;
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(130deg, var(--primary) 0%, var(--primary-strong) 72%);
  box-shadow: 0 14px 30px rgba(0, 87, 216, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 16px 34px rgba(0, 87, 216, 0.34);
}

.btn-secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.hero-meta {
  margin-top: 18px;
  display: grid;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.hero-card {
  margin: 0;
  padding: 24px;
  border-radius: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
  border: 1px solid rgba(15, 123, 255, 0.22);
  box-shadow: var(--shadow);
}

.hero-card h2 {
  margin: 0 0 14px;
  font-size: 1.2rem;
}

.hero-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 15px;
}

.hero-card li {
  display: grid;
  gap: 4px;
}

.hero-card strong {
  font-size: 0.98rem;
}

.hero-card span {
  color: var(--text-muted);
  font-size: 0.93rem;
}

.card-grid {
  display: grid;
  gap: 16px;
}

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

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 8px 22px rgba(15, 36, 75, 0.06);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

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

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

.scenario-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -42% auto;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: rgba(17, 184, 166, 0.14);
}

.features-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.feature-list {
  margin: 0;
  padding: 24px;
  list-style: none;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.feature-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text);
  font-weight: 500;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--primary), var(--accent));
}

.feature-panel {
  border-radius: 20px;
  padding: 22px;
  border: 1px solid rgba(15, 123, 255, 0.22);
  background: linear-gradient(175deg, rgba(15, 123, 255, 0.1), rgba(17, 184, 166, 0.1));
}

.feature-panel h3 {
  margin-top: 0;
}

.feature-panel p {
  margin: 0;
  color: var(--text-muted);
}

.panel-note {
  margin-top: 12px;
  font-weight: 600;
  color: var(--text);
}

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

.shot-placeholder {
  margin: 0;
}

.shot-box {
  aspect-ratio: 16 / 10;
  width: 100%;
  border-radius: 14px;
  border: 2px dashed rgba(15, 123, 255, 0.4);
  background: repeating-linear-gradient(
      -45deg,
      rgba(15, 123, 255, 0.12),
      rgba(15, 123, 255, 0.12) 16px,
      rgba(15, 123, 255, 0.04) 16px,
      rgba(15, 123, 255, 0.04) 32px
    ),
    #f8fbff;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--primary-strong);
  font-weight: 700;
  padding: 14px;
}


.shot-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid rgba(15, 123, 255, 0.24);
  background: #f8fbff;
  display: block;
}

.shot-video-frame {
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(15, 123, 255, 0.24);
  border-radius: 14px;
  background: #000;
}

.shot-placeholder figcaption {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.faq-wrap {
  max-width: 900px;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  padding: 4px 14px;
}

.faq-question {
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  font: inherit;
  font-weight: 700;
  color: var(--text);
}

.faq-icon {
  position: relative;
  width: 16px;
  height: 16px;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 7px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-strong);
  border-radius: 10px;
  transition: transform 0.2s ease;
}

.faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding-bottom 0.25s ease;
  color: var(--text-muted);
}

.faq-answer p {
  margin: 0;
}

.faq-item.is-open .faq-answer {
  max-height: 220px;
  padding-bottom: 14px;
}

.faq-item.is-open .faq-icon::after {
  transform: rotate(0deg);
}

.cta {
  padding-top: 84px;
  padding-bottom: 90px;
}

.cta-inner {
  text-align: center;
  border-radius: 24px;
  border: 1px solid rgba(15, 123, 255, 0.25);
  background: linear-gradient(145deg, rgba(15, 123, 255, 0.13), rgba(17, 184, 166, 0.13));
  padding: 48px 28px;
}

.cta-inner h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
}

.cta-inner p {
  margin: 14px auto 24px;
  color: var(--text-muted);
  max-width: 62ch;
}

.site-footer {
  padding: 28px 0 18px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(248, 251, 255, 0.85);
}

.footer-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  margin: 0;
  font-weight: 800;
}

.footer-note {
  margin: 8px 0 0;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--primary-strong);
}

.copyright {
  margin: 18px 0 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

  .hero-card {
    max-width: 680px;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .card-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  .site-nav {
    position: relative;
  }

  .nav-links {
    position: absolute;
    right: 0;
    top: 56px;
    min-width: 210px;
    padding: 10px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 18px 38px rgba(14, 33, 70, 0.16);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
  }

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

  .nav-links a {
    justify-content: flex-start;
    border-radius: 10px;
  }

  body.nav-open {
    overflow: hidden;
  }

  .hero {
    padding-top: 72px;
  }

  .card-grid-2,
  .card-grid-3,
  .shot-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .cta {
    padding: 72px 0;
  }

  .footer-wrap {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .brand-text {
    display: none;
  }

  .container {
    width: min(1120px, 94vw);
  }

  .hero h1 {
    letter-spacing: -0.01em;
  }

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

  .btn {
    width: 100%;
  }

  .section {
    padding: 64px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}