/* Article layout for the signature background removal guide. */
.article-page { background: #fafbfe; color: var(--color-text); }
.article-hero { padding: 56px 0 58px; border-bottom: 1px solid #e5e9f2; background: linear-gradient(135deg, #f7f9ff 0%, #fff9f7 100%); }
.article-container { max-width: 980px; }
.article-breadcrumbs { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; margin-bottom: 26px; color: #68738a; font-size: .82rem; }
.article-breadcrumbs a { color: #215ae8; text-decoration: none; }
.article-breadcrumbs a:hover { text-decoration: underline; }
.article-hero h1 { max-width: 820px; margin: 0 0 20px; font-size: clamp(2.25rem, 5vw, 4.35rem); line-height: 1.04; letter-spacing: -.045em; }
.article-dek { max-width: 760px; margin: 0; color: #536078; font-size: clamp(1.08rem, 2vw, 1.3rem); line-height: 1.7; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; color: #768097; font-size: .84rem; }
.article-section-shell { padding: 70px 0 110px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 780px) minmax(220px, 280px); gap: 54px; align-items: start; }
.article-main { min-width: 0; }
.article-answer { margin: 0 0 30px; color: #26334b; font-size: 1.16rem; font-weight: 600; line-height: 1.8; }
.article-figure { margin: 34px 0 40px; }
.article-figure img { display: block; width: 100%; height: auto; border: 1px solid #e5e8ef; border-radius: 20px; box-shadow: 0 18px 45px rgba(26, 45, 87, .1); }
.article-feature-figure img { aspect-ratio: 1; object-fit: cover; }
.article-inline-figure { max-width: 700px; }
.article-inline-figure img { aspect-ratio: 1; object-fit: cover; }
.article-figure figcaption { margin-top: 11px; color: #758096; font-size: .8rem; line-height: 1.55; }
.article-toc { margin: 38px 0 50px; padding: 24px 27px; border: 1px solid #dbe3f5; border-radius: 16px; background: #fff; box-shadow: 0 10px 28px rgba(30, 53, 100, .05); }
.article-toc-title { margin: 0 0 12px; color: #1d2b48; font-size: .88rem; font-weight: 750; }
.article-toc ol { margin: 0; padding-left: 1.25rem; color: #4e5b73; font-size: .9rem; line-height: 1.7; }
.article-toc ol ol { margin-top: 4px; }
.article-toc a { color: #215ae8; text-decoration: none; }
.article-toc a:hover { text-decoration: underline; }
.article-content-section { margin-top: 58px; }
.article-content-section h2, .article-sources h2, .article-related h2 { margin: 0 0 18px; color: #1e2b45; font-size: clamp(1.5rem, 2.8vw, 2.05rem); line-height: 1.18; letter-spacing: -.025em; }
.article-content-section h2::before { display: inline-block; width: 5px; height: 1.1em; margin: 0 12px -2px 0; border-radius: 999px; background: #c87885; content: ''; }
.article-content-section h3 { margin: 0 0 8px; color: #24324d; font-size: 1.06rem; }
.article-content-section p, .article-sources li, .article-related-card span { color: #59657a; font-size: 1rem; line-height: 1.85; }
.article-content-section p { margin: 0 0 18px; }
.article-check-list { margin: 22px 0 22px; padding: 0; list-style: none; }
.article-check-list li { position: relative; margin: 13px 0; padding-left: 27px; color: #536078; line-height: 1.75; }
.article-check-list li::before { position: absolute; left: 0; top: .48em; color: #c87885; content: '✓'; font-weight: 800; }
.article-step-list { display: grid; gap: 18px; margin: 28px 0 25px; padding: 0; list-style: none; }
.article-step-list li { display: grid; grid-template-columns: 38px 1fr; gap: 15px; align-items: start; padding: 18px 20px; border: 1px solid #e5e9f2; border-radius: 14px; background: #fff; }
.article-step-list li > span { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 50%; background: #eef3ff; color: #215ae8; font-size: .8rem; font-weight: 800; }
.article-step-list h3 { margin-top: 3px; }
.article-step-list p { margin: 0; font-size: .93rem; }
.article-table-wrap { overflow-x: auto; margin: 28px 0 26px; border: 1px solid #e1e6f0; border-radius: 14px; background: #fff; }
.article-table-wrap table { width: 100%; min-width: 620px; border-collapse: collapse; }
.article-table-wrap th, .article-table-wrap td { padding: 15px 17px; border-bottom: 1px solid #e7ebf2; text-align: left; vertical-align: top; line-height: 1.65; }
.article-table-wrap th { color: #293650; background: #f6f8fc; font-size: .84rem; font-weight: 750; }
.article-table-wrap td { color: #59657a; font-size: .9rem; }
.article-table-wrap tr:last-child td { border-bottom: 0; }
.article-note { margin: 26px 0; padding: 19px 21px; border-left: 4px solid #c87885; border-radius: 0 12px 12px 0; background: #fff5f3; color: #5b5360; line-height: 1.75; }
.article-note strong { color: #2b3448; }
.article-context-links { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px !important; font-size: .88rem !important; }
.article-context-links a { color: #215ae8; font-weight: 650; text-decoration: none; }
.article-context-links a:hover { text-decoration: underline; }
.article-faq-list { border-top: 1px solid #dfe5ef; }
.article-faq-list details { padding: 0; border-bottom: 1px solid #dfe5ef; }
.article-faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 19px 0; color: #293650; font-weight: 700; line-height: 1.5; cursor: pointer; list-style: none; }
.article-faq-list summary::-webkit-details-marker { display: none; }
.article-faq-list summary::after { flex: 0 0 auto; color: #215ae8; content: '+'; font-size: 1.35rem; font-weight: 400; }
.article-faq-list details[open] summary::after { content: '−'; }
.article-faq-list details p { max-width: 720px; padding: 0 48px 18px 0; margin: 0; }
.article-summary-section { padding-top: 26px; }
.article-sources { margin-top: 55px; padding-top: 32px; border-top: 1px solid #e1e6ef; }
.article-sources ul { margin: 0; padding: 0; list-style: none; }
.article-sources li { display: grid; gap: 4px; margin: 13px 0; }
.article-sources a { color: #215ae8; font-weight: 650; text-decoration: none; }
.article-sources a:hover { text-decoration: underline; }
.article-related { margin-top: 55px; padding-top: 32px; border-top: 1px solid #e1e6ef; }
.article-related-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.article-related-card { display: grid; gap: 7px; padding: 19px 20px; border: 1px solid #dfe6f3; border-radius: 14px; background: #fff; text-decoration: none; transition: border-color .18s, transform .18s, box-shadow .18s; }
.article-related-card strong { color: #293650; }
.article-related-card:hover { border-color: #aebfe9; box-shadow: 0 10px 26px rgba(31, 63, 132, .08); transform: translateY(-2px); }
.article-cta { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; margin-top: 58px; padding: 34px 36px; border-radius: 20px; background: #18243b; color: #fff; box-shadow: 0 20px 48px rgba(24, 36, 59, .16); }
.article-cta .eyebrow, .article-cta h2, .article-cta p { color: #fff; }
.article-cta h2 { margin: 0 0 11px; font-size: 1.45rem; }
.article-cta p:not(.eyebrow) { margin: 0; color: #d9e1f3; line-height: 1.7; }
.article-cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.article-cta .button-secondary { border-color: #6c7a97; color: #fff; background: transparent; }
.article-cta .button-secondary:hover { border-color: #fff; background: #fff; color: #18243b; }
.article-sidebar { position: sticky; top: 24px; display: grid; gap: 16px; }
.article-sidebar-card { padding: 23px; border: 1px solid #e0e6f1; border-radius: 16px; background: #fff; box-shadow: 0 12px 30px rgba(36, 59, 105, .05); }
.article-sidebar-card h2 { margin: 0 0 12px; color: #26334d; font-size: 1.12rem; line-height: 1.3; }
.article-sidebar-card p { margin: 0 0 18px; color: #617087; font-size: .9rem; line-height: 1.72; }
.article-sidebar-card .button { width: 100%; }
.article-sidebar-note { background: #fff7f5; }
.article-sidebar-note h2 { font-size: 1rem; }
.article-sidebar-note p { margin: 0; font-size: .84rem; }
@media (max-width: 980px) {
  .article-grid { grid-template-columns: 1fr; }
  .article-sidebar { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 文章页复用首页暗色主题，避免单页出现浅色视觉与站点主题冲突。 */
.article-page { background: #17110d; color: #f7f1eb; }
.article-hero { border-bottom-color: rgba(239,188,113,.2); background: #1c1510; }
.article-hero h1, .article-content-section h2, .article-sources h2, .article-related h2 { color: #f7f1eb; }
.article-dek, .article-meta, .article-content-section p, .article-content-section li, .article-sidebar-card p, .article-related-card span { color: #d8cec4; }
.article-section-shell { background: #17110d; }
.article-answer, .article-toc, .article-table-wrap, .article-note, .article-sidebar-card, .article-related-card { border-color: rgba(239,188,113,.2); background: #211811; color: #f7f1eb; }
.article-toc a, .article-context-links a, .article-related-card strong, .article-sources a { color: #f0a45f; }
.article-toc-title, .article-toc li, .article-toc ol, .article-sidebar-card h2, .article-related-card strong { color: #f7f1eb; }
.article-table-wrap th { background: #2a1e16; color: #f7f1eb; }
.article-table-wrap td { border-color: rgba(239,188,113,.16); color: #d8cec4; }
.article-sidebar-note { background: #2a1e16; }
.article-cta { border-color: rgba(239,188,113,.2); background: #211811; }
@media (max-width: 640px) {
  .article-hero { padding: 38px 0 42px; }
  .article-section-shell { padding: 48px 0 76px; }
  .article-hero h1 { font-size: 2.35rem; }
  .article-dek { font-size: 1rem; }
  .article-grid { gap: 34px; }
  .article-toc { padding: 19px 20px; }
  .article-related-grid, .article-sidebar { grid-template-columns: 1fr; }
  .article-cta { grid-template-columns: 1fr; padding: 27px 24px; }
  .article-cta-actions { display: grid; }
  .article-cta-actions .button { width: 100%; }
  .article-table-wrap { margin-inline: -4px; }
}

/* 文章页复用首页暗色主题，避免单页出现浅色视觉与站点主题冲突。 */
.article-page { background: #17110d; color: #f7f1eb; }
.article-hero { border-bottom-color: rgba(239,188,113,.2); background: #1c1510; }
.article-hero h1, .article-content-section h2, .article-sources h2, .article-related h2 { color: #f7f1eb; }
.article-dek, .article-meta, .article-content-section p, .article-content-section li, .article-sidebar-card p, .article-related-card span { color: #d8cec4; }
.article-section-shell { background: #17110d; }
.article-answer, .article-toc, .article-table-wrap, .article-note, .article-sidebar-card, .article-related-card { border-color: rgba(239,188,113,.2); background: #211811; color: #f7f1eb; }
.article-toc a, .article-context-links a, .article-related-card strong, .article-sources a { color: #f0a45f; }
.article-toc-title, .article-toc li, .article-toc ol, .article-sidebar-card h2, .article-related-card strong { color: #f7f1eb; }
.article-table-wrap th { background: #2a1e16; color: #f7f1eb; }
.article-table-wrap td { border-color: rgba(239,188,113,.16); color: #d8cec4; }
.article-sidebar-note { background: #2a1e16; }
.article-cta { border-color: rgba(239,188,113,.2); background: #211811; }