:root {
  --seo-ink: #12202f;
  --seo-muted: #5c6b78;
  --seo-line: #dce4ea;
  --seo-soft: #f4f7f9;
  --seo-red: #d71920;
  --seo-red-dark: #a90f15;
  --seo-white: #fff;
}

.seo-page {
  margin: 0;
  color: var(--seo-ink);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}

.seo-page * { box-sizing: border-box; }
.seo-page a { color: inherit; }
.seo-wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.seo-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--seo-line);
  backdrop-filter: blur(12px);
}

.seo-header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.seo-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; }
.seo-brand img { width: 46px; height: 46px; object-fit: contain; }
.seo-brand span { display: grid; line-height: 1.2; }
.seo-brand small { margin-top: 4px; color: var(--seo-muted); font-size: 11px; font-weight: 600; letter-spacing: .09em; }
.seo-nav { display: flex; align-items: center; gap: 22px; font-size: 14px; font-weight: 700; }
.seo-nav a { text-decoration: none; }
.seo-nav a:hover { color: var(--seo-red); }

.seo-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 92px 0 76px;
  color: var(--seo-white);
  background: #142331;
}

.seo-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: linear-gradient(90deg, rgba(12, 24, 35, .96), rgba(12, 24, 35, .68)), url("assets/factory/workshop-main.jpg") center/cover no-repeat;
}

.seo-hero::after {
  content: "";
  position: absolute;
  right: -160px;
  bottom: -240px;
  z-index: -1;
  width: 520px;
  height: 520px;
  border: 90px solid rgba(215, 25, 32, .22);
  border-radius: 50%;
}

.seo-kicker { margin: 0 0 12px; color: #ffb2b5; font-size: 13px; font-weight: 800; letter-spacing: .15em; }
.seo-hero h1 { max-width: 920px; margin: 0; font-size: clamp(34px, 5vw, 62px); line-height: 1.15; }
.seo-lead { max-width: 850px; margin: 24px 0 0; color: #e8eef2; font-size: clamp(17px, 2vw, 21px); }
.seo-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.seo-meta span { padding: 8px 14px; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; background: rgba(255,255,255,.08); font-size: 13px; }

.seo-answer { margin-top: -34px; position: relative; z-index: 3; }
.seo-answer-inner { padding: 30px 34px; background: var(--seo-white); border-top: 5px solid var(--seo-red); box-shadow: 0 18px 50px rgba(18,32,47,.14); }
.seo-answer strong { display: block; margin-bottom: 8px; color: var(--seo-red); font-size: 15px; }
.seo-answer p { margin: 0; font-size: 18px; }

.seo-section { padding: 72px 0; }
.seo-section.soft { background: var(--seo-soft); }
.seo-section-head { max-width: 820px; margin-bottom: 34px; }
.seo-section-head span { color: var(--seo-red); font-size: 13px; font-weight: 800; letter-spacing: .12em; }
.seo-section-head h2 { margin: 7px 0 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.25; }
.seo-section-head p { margin: 14px 0 0; color: var(--seo-muted); }

.seo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.seo-card { padding: 26px; background: #fff; border: 1px solid var(--seo-line); }
.seo-card .num { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 17px; color: #fff; background: var(--seo-red); font-weight: 800; }
.seo-card h3 { margin: 0 0 10px; font-size: 21px; line-height: 1.35; }
.seo-card p { margin: 0; color: var(--seo-muted); }
.seo-card a { display: inline-block; margin-top: 16px; color: var(--seo-red); font-weight: 800; text-decoration: none; }

.seo-table-wrap { overflow-x: auto; border: 1px solid var(--seo-line); background: #fff; }
.seo-table { width: 100%; border-collapse: collapse; min-width: 760px; }
.seo-table th, .seo-table td { padding: 17px 18px; border-bottom: 1px solid var(--seo-line); text-align: left; vertical-align: top; }
.seo-table th { color: #fff; background: #172735; font-size: 14px; }
.seo-table tr:last-child td { border-bottom: 0; }
.seo-table td:first-child { font-weight: 800; }

.seo-evidence { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; align-items: start; }
.seo-evidence-intro { padding: 30px; color: #fff; background: #172735; }
.seo-evidence-intro h2 { margin: 0 0 14px; font-size: 32px; line-height: 1.25; }
.seo-evidence-intro p { margin: 0; color: #d5dde3; }
.seo-link-list { display: grid; gap: 12px; }
.seo-link-list a { padding: 17px 20px; background: #fff; border: 1px solid var(--seo-line); text-decoration: none; font-weight: 800; }
.seo-link-list a:hover { color: var(--seo-red); border-color: var(--seo-red); }

.seo-faq { display: grid; gap: 13px; }
.seo-faq details { background: #fff; border: 1px solid var(--seo-line); }
.seo-faq summary { cursor: pointer; padding: 19px 22px; font-weight: 800; }
.seo-faq details p { margin: 0; padding: 0 22px 20px; color: var(--seo-muted); }

.seo-cta { padding: 56px 0; color: #fff; background: var(--seo-red); }
.seo-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.seo-cta h2 { margin: 0 0 8px; font-size: 32px; }
.seo-cta p { margin: 0; color: #ffe6e7; }
.seo-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; background: #fff; color: var(--seo-red); text-decoration: none; font-weight: 800; white-space: nowrap; }

.seo-footer { padding: 32px 0; color: #ccd5dc; background: #101c26; font-size: 13px; }
.seo-footer-inner { display: flex; justify-content: space-between; gap: 20px; }
.seo-footer a { color: #fff; text-decoration: none; }

.seo-entry { background: #f3f5f7; }
.seo-entry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.seo-entry-card { display: block; padding: 28px; color: #172735; background: #fff; border-top: 4px solid #d71920; box-shadow: 0 14px 30px rgba(21,35,48,.08); text-decoration: none; }
.seo-entry-card small { color: #d71920; font-weight: 800; letter-spacing: .08em; }
.seo-entry-card h3 { margin: 8px 0 10px; font-size: 22px; }
.seo-entry-card p { margin: 0; color: #66737d; line-height: 1.7; }

.seo-product-hero { padding: 70px 0 66px; }
.seo-product-hero::before { background: linear-gradient(90deg, rgba(12,24,35,.98), rgba(12,24,35,.82)), url("assets/factory/workshop-main.jpg") center/cover no-repeat; }
.seo-product-hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 42px; align-items: center; }
.seo-product-visual, .seo-proof-figure { margin: 0; overflow: hidden; background: #fff; border: 1px solid rgba(255,255,255,.18); box-shadow: 0 22px 55px rgba(0,0,0,.22); }
.seo-product-visual img, .seo-proof-figure img { display: block; width: 100%; height: auto; object-fit: cover; }
.seo-product-visual figcaption, .seo-proof-figure figcaption { padding: 12px 15px; color: var(--seo-muted); background: #fff; font-size: 13px; }
.seo-proof-layout { display: grid; grid-template-columns: 1fr .92fr; gap: 42px; align-items: center; }
.seo-proof-points { display: grid; gap: 12px; }
.seo-proof-points p { margin: 0; padding: 16px 18px; background: var(--seo-soft); border-left: 4px solid var(--seo-red); }
.seo-proof-points strong { color: var(--seo-red-dark); }

@media (max-width: 860px) {
  .seo-nav { display: none; }
  .seo-grid, .seo-entry-grid { grid-template-columns: 1fr; }
  .seo-evidence { grid-template-columns: 1fr; }
  .seo-product-hero-grid, .seo-proof-layout { grid-template-columns: 1fr; }
  .seo-cta-inner, .seo-footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .seo-wrap { width: min(100% - 26px, 1180px); }
  .seo-header-inner { min-height: 62px; }
  .seo-brand img { width: 38px; height: 38px; }
  .seo-brand strong { font-size: 14px; }
  .seo-hero { padding: 68px 0 60px; }
  .seo-answer-inner { padding: 24px 20px; }
  .seo-answer p { font-size: 16px; }
  .seo-section { padding: 54px 0; }
  .seo-card { padding: 22px; }
}