:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --line: #d7e0ee;
  --text: #10213d;
  --muted: #5d6b83;
  --primary: #102c65;
  --accent: #e31b23;
  --soft: #edf2fb;
}

* { 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, #ffffff 0%, var(--bg) 100%);
  color: var(--text);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.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: 0.12em; 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, .cta-inner p, .faq-answer p { line-height: 1.8; color: var(--muted); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  backdrop-filter: blur(10px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}
.brand img { height: 34px; object-fit: contain; }
.nav { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.nav a:hover { color: var(--primary); }
.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--primary);
  border-radius: 999px;
  padding: 10px 16px;
}

.hero, .entry-grid-section, .reading-order, .device-zone, .faq-section, .related-searches, .cta-band { padding: 72px 0; }
.hero-grid, .device-grid, .cta-inner { display: grid; gap: 30px; align-items: center; }
.hero-grid { grid-template-columns: 1.15fr 0.85fr; }
.hero-copy { padding-right: 12px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--soft); color: var(--primary); border: 1px solid var(--line); }

.hero-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 22px 60px rgba(16, 44, 101, 0.08);
}
.hero-panel h2 { margin-top: 0; }
.hero-links {
  list-style: none;
  padding: 0;
  margin: 18px 0 24px;
  display: grid;
  gap: 14px;
}
.hero-links li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}
.hero-links span { color: var(--muted); }
.contain-image { object-fit: contain; object-position: center; }
.panel-image { max-height: 230px; margin: 0 auto; }

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.entry-grid article {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 20px;
}
.entry-grid h3, .steps-row h3, .device-meta strong { margin-top: 0; }

.steps-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.steps-row article {
  background: linear-gradient(180deg, #ffffff 0%, #eef3fa 100%);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
}
.steps-row span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-weight: 700;
}

.device-grid { grid-template-columns: 1fr 0.95fr; }
.device-card {
  background: var(--primary);
  color: #fff;
  border-radius: 28px;
  padding: 24px;
}
.device-card img { margin: 0 auto 22px; max-height: 260px; }
.device-meta + .device-meta { margin-top: 18px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.18); }
.device-meta p { margin: 6px 0 0; color: rgba(255,255,255,0.8); }

.faq-list { display: grid; gap: 16px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  font: inherit;
  font-weight: 700;
  color: var(--text);
  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);
  color: var(--primary);
  font-weight: 600;
}

.cta-band { padding-top: 0; }
.cta-inner {
  grid-template-columns: 1fr auto;
  background: linear-gradient(135deg, var(--primary), #163c84);
  color: #fff;
  border-radius: 28px;
  padding: 34px;
}
.cta-inner p { color: rgba(255,255,255,0.72); }

@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: 18px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
  }
  .nav.open { display: flex; }
  .hero-grid, .device-grid, .cta-inner, .entry-grid, .steps-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 24px, 1160px); }
  .hero, .entry-grid-section, .reading-order, .device-zone, .faq-section, .related-searches, .cta-band { padding: 56px 0; }
  .hero-panel, .entry-grid article, .steps-row article, .device-card, .cta-inner { border-radius: 20px; }
}

.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;
}