.input-card{background:var(--header-bg);border:1px solid var(--divider);border-radius:var(--radius-lg);box-shadow:var(--card-shadow);overflow:hidden;margin-bottom:20px}.input-card__header{padding:14px 18px;border-bottom:1px solid var(--divider);display:flex;align-items:center;justify-content:space-between;gap:10px}.input-card__title{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary-text)}.input-card__title i{color:var(--primary-color);font-size:17px}.input-card__actions{display:flex;gap:7px;flex-wrap:wrap}.chip-btn{display:flex;align-items:center;gap:5px;padding:5px 12px;border-radius:8px;border:1px solid var(--divider);background:var(--section-bg);font-size:11px;font-weight:500;color:var(--gray-text);transition:all 0.2s}.chip-btn:hover{border-color:var(--primary-color);color:var(--primary-color);background:#eef0fd}[data-theme="dark"] .chip-btn:hover{background:#1e2240}.input-card__body{padding:14px 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0.2s}.preview-action-btn:hover{border-color:var(--primary-color);color:var(--primary-color)}.preview-action-btn.success{background:#f0fdf4;border-color:#86efac;color:#16a34a}.preview-body{padding:16px;display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap}.img-frame{flex-shrink:0;background:repeating-conic-gradient(#e0e0e0 0% 25%,#f8f8f8 0% 50%) 0 0/16px 16px;border-radius:var(--radius-md);border:1px solid var(--divider);overflow:hidden;display:flex;align-items:center;justify-content:center;min-width:140px;min-height:120px;max-width:280px;max-height:280px;position:relative}[data-theme="dark"] .img-frame{background:repeating-conic-gradient(#1e2737 0% 25%,#151d29 0% 50%) 0 0/16px 16px}.img-frame 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rgb(250 204 21 / .55)}.bti-mountain{position:absolute;bottom:0;width:160px;height:100px;background:#6366f1;transform:rotate(45deg);border-radius:16px}.bti-mountain-one{left:34px;bottom:-54px}.bti-mountain-two{right:24px;bottom:-62px;background:#8b5cf6}.bti-image-badge{position:absolute;left:12px;top:12px;padding:5px 10px;border-radius:999px;background:rgb(255 255 255 / .82);color:var(--primary-color);font-size:10px;font-weight:800;backdrop-filter:blur(8px)}.bti-file-info{padding:0 14px 14px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.bti-file-info div{padding:10px;border-radius:12px;background:var(--header-bg);border:1px solid var(--divider)}.bti-file-info span{display:block;font-size:10px;color:var(--gray-text);margin-bottom:4px}.bti-file-info strong{display:block;font-size:12px;color:var(--primary-text)}.bti-example-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.bti-step{background:var(--header-bg);border:1px solid 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17px;display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--primary-text);font-size:13px;font-weight:600}.bti-faq-item summary::-webkit-details-marker{display:none}.bti-faq-item summary i{color:var(--primary-color);font-size:17px;transition:transform 0.3s ease;flex-shrink:0}.bti-faq-content{display:grid;grid-template-rows:0fr;transition:grid-template-rows 0.35s ease}.bti-faq-content>p{overflow:hidden;padding:0 17px;font-size:12px;line-height:1.8;color:var(--gray-text);transition:padding 0.35s ease,opacity 0.25s ease;opacity:0}.bti-faq-item[open] summary{border-bottom:1px solid var(--divider)}.bti-faq-item[open] summary i{transform:rotate(180deg)}.bti-faq-item[open] .bti-faq-content{grid-template-rows:1fr}.bti-faq-item[open] .bti-faq-content>p{padding:14px 17px 16px;opacity:1}.bti-faq-item strong{color:var(--primary-color);font-weight:600}.bti-faq-item:hover{border-color:rgb(99 102 241 / .35);transform:translateY(-1px)}[data-theme="dark"] .bti-faq-kicker{background:#1e2240}@media (max-width:520px){.bti-faq-head h2{font-size:22px}.bti-faq-item summary{padding:13px 14px;font-size:12px}.bti-faq-item p{padding:12px 14px 14px;font-size:11px}}.bti-faq-item.is-closing .bti-faq-content{grid-template-rows:0fr}.bti-faq-item.is-closing .bti-faq-content>p{padding-top:0;padding-bottom:0;opacity:0}.bti-related-section{margin-top:34px;margin-bottom:42px;padding:20px}.bti-related-head{text-align:center;max-width:680px;margin:0 auto 18px}.bti-related-kicker{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;background:#eef0fd;color:var(--primary-color);font-size:11px;font-weight:600;margin-bottom:10px}.bti-related-head h2{font-size:26px;line-height:1.3;color:var(--primary-text);margin-bottom:8px}.bti-related-head p{font-size:13px;line-height:1.8;color:var(--gray-text)}.bti-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.bti-tool-card{position:relative;background:var(--header-bg);border:1px solid var(--divider);border-radius:var(--radius-md);box-shadow:var(--card-shadow);padding:15px;display:flex;align-items:flex-start;gap:12px;overflow:hidden;transition:transform 0.25s ease,border-color 0.25s ease,box-shadow 0.25s ease}.bti-tool-card::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgb(99 102 241 / .1),transparent 55%);opacity:0;transition:opacity 0.25s ease;pointer-events:none}.bti-tool-card:hover{transform:translateY(-4px);border-color:rgb(99 102 241 / .35);box-shadow:0 14px 34px rgb(99 102 241 / .14)}.bti-tool-card:hover::before{opacity:1}.bti-tool-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0;position:relative;z-index:1}.bti-tool-content{flex:1;min-width:0;position:relative;z-index:1}.bti-tool-content h3{font-size:13px;color:var(--primary-text);font-weight:600;margin-bottom:5px}.bti-tool-content p{font-size:11px;line-height:1.65;color:var(--gray-text)}.bti-tool-arrow{width:28px;height:28px;border-radius:9px;border:1px solid var(--divider);background:var(--section-bg);color:var(--gray-text);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;position:relative;z-index:1;transition:all 0.25s ease}.bti-tool-card:hover .bti-tool-arrow{background:var(--primary-color);border-color:var(--primary-color);color:#fff;transform:translateX(3px)}.bti-purple{background:#eef0fd;color:#6366f1}.bti-blue{background:#eff6ff;color:#2563eb}.bti-green{background:#f0fdf4;color:#16a34a}.bti-orange{background:#fff7ed;color:#ea580c}.bti-cyan{background:#ecfeff;color:#0891b2}.bti-red{background:#fef2f2;color:#dc2626}[data-theme="dark"] .bti-related-kicker,[data-theme="dark"] .bti-purple{background:#1e2240}[data-theme="dark"] .bti-blue{background:#10213f}[data-theme="dark"] .bti-green{background:#052e16}[data-theme="dark"] .bti-orange{background:#30180a}[data-theme="dark"] .bti-cyan{background:#083344}[data-theme="dark"] .bti-red{background:#2a0d0d}@media (max-width:900px){.bti-related-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:560px){.bti-related-head h2{font-size:22px}.bti-related-grid{grid-template-columns:1fr}.bti-tool-card{padding:13px}}