.seo-knowledge { position: relative; z-index: 11; box-sizing: border-box; width: 100%; padding: clamp(72px, 9vw, 144px) clamp(24px, 7vw, 120px); color: #181818; background: #f7f5ef; font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif; }
.seo-knowledge__inner { max-width: 1180px; margin: 0 auto; }
.seo-knowledge__eyebrow { margin: 0 0 18px; color: #5a3ee8; font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.seo-knowledge h2 { max-width: 900px; margin: 0; font-size: clamp(36px, 5vw, 76px); line-height: 1.02; letter-spacing: -.04em; }
.seo-knowledge__lead { max-width: 880px; margin: 32px 0 52px; font-size: clamp(18px, 1.6vw, 25px); line-height: 1.65; }
.seo-knowledge__proof { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 56px; }
.seo-knowledge__proof div { min-height: 120px; padding: 22px; border-radius: 18px; color: #fff; background: #3b16ee; }
.seo-knowledge__proof strong { display: block; font-size: clamp(26px, 3vw, 46px); line-height: 1; }
.seo-knowledge__proof span { display: block; margin-top: 12px; font-size: 14px; line-height: 1.45; }
.seo-knowledge__source { margin: -38px 0 54px; color: #676767; font-size: 12px; }
.seo-knowledge__topics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 0 0 24px; }
.seo-knowledge__topics a { display: flex; min-height: 110px; padding: 22px 24px; flex-direction: column; justify-content: space-between; border: 1px solid rgba(24,24,24,.14); border-radius: 16px; color: #181818; background: #fff; text-decoration: none; }
.seo-knowledge__topics a:hover, .seo-knowledge__topics a:focus-visible { border-color: #3b16ee; outline: none; transform: translateY(-2px); }
.seo-knowledge__topics strong { font-size: 18px; line-height: 1.35; }
.seo-knowledge__topics span { margin-top: 18px; color: #656565; font-size: 13px; line-height: 1.5; }
.seo-knowledge__faq { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.seo-knowledge details { padding: 22px 24px; border: 1px solid rgba(24,24,24,.14); border-radius: 16px; background: #fff; }
.seo-knowledge summary { cursor: pointer; font-size: 18px; font-weight: 800; line-height: 1.4; }
.seo-knowledge details p { margin: 14px 0 0; color: #464646; font-size: 15px; line-height: 1.75; }
@media (max-width: 768px) {
  .section_1-title-cn { font-size: 15px !important; letter-spacing: .4px !important; white-space: nowrap !important; }
  .seo-knowledge__proof { grid-template-columns: 1fr 1fr; }
  .seo-knowledge__topics { grid-template-columns: 1fr; }
  .seo-knowledge__faq { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .seo-knowledge *, .seo-knowledge *::before, .seo-knowledge *::after { animation: none !important; transition: none !important; } }