.product-detail > * { min-width: 0; }
.thumb-row { max-width: 100%; }
.product-info { overflow-wrap: anywhere; }
.quick-specs div { grid-template-columns: 110px minmax(0, 1fr); }
@media (max-width: 430px) { .quick-specs div { grid-template-columns: 88px minmax(0, 1fr); } }

.breadcrumb-wrap { background: #f3f6f8; border-bottom: 1px solid #dce3e9; }
.breadcrumb { min-height: 44px; display: flex; align-items: center; gap: 10px; color: #66717d; font-size: 13px; overflow: hidden; white-space: nowrap; }
.breadcrumb a:hover { color: #15467f; }
.breadcrumb strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; color: #17202a; }

.seo-guide-section { background: #f3f6f8; }
.seo-guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.seo-guide-card { min-height: 300px; display: flex; flex-direction: column; padding: 30px; background: #fff; border-top: 3px solid #15467f; box-shadow: 0 12px 30px rgba(13, 40, 70, .08); }
.seo-guide-card > small { color: #1f6fb6; font-weight: 800; letter-spacing: 2px; }
.seo-guide-card h3 { margin: 18px 0 12px; font-size: 22px; line-height: 1.45; }
.seo-guide-card p { color: #66717d; font-size: 14px; }
.seo-guide-card > a { margin-top: auto; color: #15467f; font-weight: 800; }

.guide-page-hero, .guide-detail-hero { background: linear-gradient(115deg, #0c2d54, #1b5b96); }
.guide-detail-hero h1 { max-width: 900px; }
.guide-detail-hero p { max-width: 880px; font-size: 18px; }
.guide-meta { margin-top: 22px; color: #a9c4dc; font-size: 13px; }
.guide-center-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.guide-center-card { min-height: 300px; display: flex; flex-direction: column; padding: 34px; border: 1px solid #dce3e9; background: #fff; }
.guide-center-card > small { color: #1f6fb6; font-weight: 800; letter-spacing: 2px; }
.guide-center-card h2 { margin: 16px 0 12px; font-size: 25px; line-height: 1.45; }
.guide-center-card p { color: #66717d; }
.guide-center-card > div { display: flex; justify-content: space-between; gap: 16px; margin-top: auto; padding-top: 22px; border-top: 1px solid #dce3e9; color: #15467f; font-weight: 800; font-size: 14px; }

.guide-reading-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 54px; align-items: start; }
.guide-article { min-width: 0; }
.guide-lead { margin: 0 0 42px; padding: 26px 28px; border-left: 4px solid #df8b26; background: #f3f6f8; color: #394552; font-size: 18px; }
.guide-article > section { padding: 0 0 30px; margin-bottom: 36px; border-bottom: 1px solid #dce3e9; }
.guide-article h2 { margin: 0 0 18px; color: #15467f; font-size: 29px; line-height: 1.4; }
.guide-article h3 { font-size: 19px; line-height: 1.5; }
.guide-article p { color: #53606d; }
.guide-aside { position: sticky; top: 112px; padding: 28px; background: #f3f6f8; border-top: 4px solid #15467f; }
.guide-aside > span { color: #1f6fb6; font-size: 11px; font-weight: 800; letter-spacing: 2px; }
.guide-aside h2 { margin: 10px 0 20px; font-size: 22px; }
.guide-aside > img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; margin-bottom: 18px; }
.guide-aside > .btn { width: 100%; margin-top: 10px; }
.guide-aside > a:not(.btn) { display: block; padding: 16px 0; border-top: 1px solid #d0dbe4; }
.guide-aside > a:not(.btn) strong, .guide-aside > a:not(.btn) small { display: block; }
.guide-aside > a:not(.btn) small { margin-top: 5px; color: #1f6fb6; }
.guide-aside-links { margin-top: 24px; padding-top: 20px; border-top: 1px solid #d0dbe4; }
.guide-aside-links strong, .guide-aside-links a { display: block; }
.guide-aside-links a { padding: 10px 0; color: #15467f; font-size: 14px; }
.faq-list { display: grid; gap: 14px; }
.faq-list article { padding: 22px 24px; background: #f3f6f8; }
.faq-list h3 { margin: 0 0 8px; }
.faq-list p { margin: 0; }
.guide-disclaimer { padding: 18px 22px; background: #fff7eb; color: #73551f; font-size: 13px; }

.product-selection-section { background: #0d2f55; color: #fff; }
.product-selection-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 60px; align-items: start; }
.product-selection-layout h2 { margin: 12px 0; font-size: 32px; }
.product-selection-layout p { color: #c8d8e8; }
.selection-checklist { display: grid; gap: 12px; padding: 0; margin: 0; list-style: none; }
.selection-checklist li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: center; padding: 20px; border: 1px solid #43688d; background: rgba(255, 255, 255, .04); }
.selection-checklist b { color: #8bc1ef; letter-spacing: 2px; }
.product-faq-section { background: #fff; }

@media (max-width: 900px) {
  .seo-guide-grid { grid-template-columns: 1fr; }
  .guide-center-grid { grid-template-columns: 1fr; }
  .guide-reading-layout, .product-selection-layout { grid-template-columns: 1fr; gap: 36px; }
  .guide-aside { position: static; }
}

@media (max-width: 520px) {
  .breadcrumb { min-height: 40px; }
  .seo-guide-card, .guide-center-card { min-height: 0; padding: 24px; }
  .guide-center-card h2 { font-size: 22px; }
  .guide-detail-hero p { font-size: 16px; }
  .guide-lead { padding: 20px; font-size: 16px; }
  .guide-article h2 { font-size: 25px; }
  .guide-aside { padding: 22px; }
}