.btc-article{max-width:896px;margin:0 auto;padding:24px 20px 40px;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:#5a5049}.btc-art-header{text-align:center;margin-bottom:28px}.btc-art-title{font-size:clamp(1.4rem,4vw,1.8rem);font-weight:700;color:#1a1612;line-height:1.4;letter-spacing:.02em}.btc-art-section{padding:22px 24px;border-radius:14px;margin-bottom:20px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.btc-art-subtitle{font-size:1.08rem;font-weight:600;color:#1a1612;margin-bottom:12px;letter-spacing:.02em}.btc-art-text{font-size:.92rem;line-height:1.85;color:#5a5049}.btc-art-text strong{color:#ea580c;font-weight:600}.btc-art-overview{background:#fff8f5d1;border:1px solid rgba(234,88,12,.12);box-shadow:0 2px 16px #ea580c0d}.btc-art-intro{font-size:.92rem;line-height:1.85;color:#5a5049;margin-bottom:20px;padding:0 4px}.btc-art-knowledge,.btc-art-tutorial,.btc-art-principle{background:#faf7f4bf;border:1px solid rgba(237,232,226,.6);box-shadow:0 1px 10px #00000008}.btc-art-features{background:#fff8f5b8;border-left:4px solid #ea580c;border-radius:0 14px 14px 0;padding-left:28px;box-shadow:0 2px 14px #ea580c0a}.btc-art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.btc-art-card{background:#ffffffd9;border:1px solid #ede8e2;border-radius:10px;padding:16px 18px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:border-color .18s,box-shadow .18s}.btc-art-card:hover{border-color:#e8d5cc;box-shadow:0 3px 12px #0000000f}.btc-art-card-title{font-size:.92rem;font-weight:600;color:#1a1612;margin-bottom:6px}.btc-art-card-desc{font-size:.8rem;color:#9e9389;line-height:1.6}.btc-art-scenarios{background:#fffbebb3;border-left:4px solid #f59e0b;border-radius:0 14px 14px 0;padding-left:28px;box-shadow:0 2px 12px #f59e0b0a}.btc-art-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.btc-art-list li,.btc-art-ulist li{font-size:.92rem;line-height:1.75;color:#5a5049;position:relative;padding-left:20px}.btc-art-list li:before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:#ea580c;opacity:.65}.btc-art-ulist li:before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:#f59e0b;opacity:.6}.btc-art-faq{margin-bottom:32px}.btc-art-faq-list{display:flex;flex-direction:column;gap:10px}.btc-art-details{background:#faf7f4c7;border:1px solid rgba(237,232,226,.6);border-radius:10px;padding:16px 20px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:border-color .15s,box-shadow .15s}.btc-art-details:hover{border-color:#d6cfc8;box-shadow:0 2px 10px #0000000a}.btc-art-summary{font-size:.92rem;font-weight:600;color:#1a1612;cursor:pointer;outline:none;-webkit-user-select:none;user-select:none}.btc-art-answer{margin-top:10px;font-size:.88rem;line-height:1.8;color:#7a7169}.btc-art-footer{text-align:center;font-size:.84rem;color:#b0a89e;padding-top:20px;border-top:1px solid #ede8e2;line-height:1.7}.btc-art-link{color:#ea580c;text-decoration:none;font-weight:500;transition:color .15s}.btc-art-link:hover{color:#c2410c;text-decoration:underline}@media(max-width:768px){.btc-art-grid{grid-template-columns:repeat(2,1fr)}.btc-art-section{padding:18px}}@media(max-width:480px){.btc-article{padding:16px 14px 32px}.btc-art-grid{grid-template-columns:1fr}.btc-art-section{padding:16px 14px;border-radius:12px}.btc-art-features,.btc-art-scenarios{padding-left:18px}.btc-art-title{font-size:1.25rem}.btc-art-subtitle{font-size:1rem}.btc-art-text,.btc-art-intro,.btc-art-list li{font-size:.86rem}}:global(body:has(.btc-article) .main-content),:global(body:has(.btc-article) .article-container){background:transparent!important}:global(body:has(.btc-article)){background:#f5f3ef!important}.theme-btc-article{background:#f5f3ef!important}.theme-btc-article-bc{background:#f5f3eff7!important}