/* Version 46: product differentiation and video presentation */
.video-frame { width: min(100%, 960px); margin: 34px auto 8px; min-width: 0; }
.video-frame video { width: 100%; max-width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; display: block; border-radius: 14px; background: #0b1524; box-shadow: 0 24px 60px rgba(15,39,64,.18); }
.video-frame .video-note { text-align: center; font-size: 14px; color: #5b6b80; margin-top: 10px; }
.distinction-section { padding-top: 18px; }
.distinction-intro { margin-bottom: 36px; }
.distinction-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.distinction-card { padding: 34px; border: 1px solid #d6e1eb; border-radius: 20px; }
.distinction-card > span { display: block; color: #3388cf; font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.distinction-card h3 { font-size: clamp(25px,2.3vw,38px); margin: 0 0 12px; }
.distinction-card p { margin: 0; color: #52657a; font-size: 18px; line-height: 1.6; }
.technical-structure { background: #f4f7fa; }
.business-meaning { background: #071e35; border-color: #173a5c; }
.business-meaning h3 { color: #fff; }
.business-meaning p { color: #c8d7e6; }
.distinction-conclusion { margin: 20px 0 0; padding-left: 20px; border-left: 4px solid #e9aa25; color: #071e35; font-size: 19px; font-weight: 700; }
.meaning-callout { background: #071e35; color: #fff; padding: 48px 0; }
.meaning-callout-in { display: grid; grid-template-columns: .65fr 1.4fr 1fr; gap: 34px; align-items: start; }
.meaning-callout h2 { color: #fff; margin: 0; font-size: clamp(30px,3vw,50px); }
.meaning-callout p { color: #c8d7e6; margin: 4px 0 0; font-size: 18px; line-height: 1.65; }
@media (max-width: 800px) {
  .distinction-grid, .meaning-callout-in { grid-template-columns: 1fr; }
  .distinction-card { padding: 26px; }
}