:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --line: #dde3ee;
  --text: #1b2433;
  --muted: #697488;
  --accent: #e31b23;
  --tech: #5968ff;
  --soft: #eef2fb;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: linear-gradient(180deg, #fff 0%, var(--bg) 100%); color: var(--text); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.contain-image { object-fit: contain; object-position: center; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading h2, .hero h1, .cta-inner h2 { margin: 0 0 14px; line-height: 1.15; }
.section-heading p, .hero p, .faq-answer p, .feature-copy p { color: var(--muted); line-height: 1.8; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand img { height: 34px; }
.nav { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.menu-toggle { display: none; border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 999px; padding: 10px 16px; }

.hero, .scenes, .requirements, .feature-zone, .difference, .faq-section, .related-searches, .cta-band { padding: 72px 0; }
.hero-grid, .feature-grid, .split-grid, .cta-inner { display: grid; gap: 28px; align-items: center; }
.hero-grid { grid-template-columns: 1fr .9fr; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; border-radius: 16px; font-weight: 700; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { border: 1px solid var(--line); background: var(--surface); }
.desktop-stage { display: grid; place-items: center; }
.monitor-frame { width: 100%; padding: 20px; border-radius: 28px; background: linear-gradient(180deg, #181e2a, #2b3141); box-shadow: 0 28px 60px rgba(20,24,32,.18); }
.monitor-frame img { max-height: 340px; margin: 0 auto; }

.scene-grid, .split-grid { display: grid; gap: 18px; }
.scene-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.scene-grid article, .panel, .faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; }
.scene-grid article { padding: 24px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
th, td { padding: 16px; border-bottom: 1px solid var(--line); text-align: left; }
th { background: #f8f9fc; }

.feature-grid { grid-template-columns: .95fr 1.05fr; }
.feature-media { padding: 20px; border-radius: 24px; background: linear-gradient(180deg, #fff 0%, var(--soft) 100%); border: 1px solid var(--line); }
.feature-media img { max-height: 320px; margin: 0 auto; }
.feature-list { margin: 18px 0 0; padding-left: 18px; color: var(--muted); line-height: 1.9; }

.split-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
.panel { padding: 22px; }
.panel img { max-height: 200px; margin: 0 auto 16px; }
.dark-panel { background: linear-gradient(135deg, #20283a, #394159); color: #fff; }
.dark-panel p { color: rgba(255,255,255,.78); }

.faq-list { display: grid; gap: 16px; }
.faq-item { overflow: hidden; }
.faq-question { width: 100%; border: 0; background: transparent; text-align: left; font: inherit; font-weight: 700; padding: 20px 22px; cursor: pointer; }
.faq-answer { display: none; padding: 0 22px 20px; }
.faq-item.open .faq-answer { display: block; }

.tag-list { display: flex; flex-wrap: wrap; gap: 12px; }
.tag-list span { padding: 12px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); font-weight: 600; }

.cta-band { padding-top: 0; }
.cta-inner { grid-template-columns: 1fr auto; background: linear-gradient(135deg, #fff, #eef2fb); border: 1px solid var(--line); border-radius: 28px; padding: 34px; }

@media (max-width: 980px) {
  .menu-toggle { display: inline-flex; }
  .nav { position: absolute; top: calc(100% + 8px); right: 20px; left: 20px; display: none; flex-direction: column; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; }
  .nav.open { display: flex; }
  .hero-grid, .scene-grid, .feature-grid, .split-grid, .cta-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 24px, 1160px); }
  .hero, .scenes, .requirements, .feature-zone, .difference, .faq-section, .related-searches, .cta-band { padding: 56px 0; }
}

.site-logo,
.logo img,
.brand img,
.header-logo img,
.nav-logo img {
  display: block;
  width: auto !important;
  height: auto !important;
  max-height: 40px !important;
  max-width: 180px !important;
  object-fit: contain !important;
}

.brand,
.logo,
.header-logo,
.nav-logo {
  overflow: visible !important;
}

.site-header .brand,
header .brand,
header .logo,
header .header-logo,
header .nav-logo {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}