:root{--bg:#fafbfd;--surface:#ffffff;--ink:#0f172a;--ink-2:#475569;--ink-3:#94a3b8;--accent:#2563eb;--accent-2:#7c3aed;--accent-soft:#eff4ff;--red:#ff0033;--line:#e8edf4;--radius:18px;--shadow-sm:0 1px 2px rgba(15,23,42,.05);--shadow-md:0 8px 30px -8px rgba(15,23,42,.12);--shadow-lg:0 24px 60px -16px rgba(37,99,235,.18)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button{font-family:inherit}.wrap{max-width:1180px;margin:0 auto;padding:0 24px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}nav.site{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:rgba(250,251,253,.85);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav-inner{justify-content:space-between;height:64px}.logo,.nav-inner{display:flex;align-items:center}.logo{gap:10px;font-weight:800;font-size:19px;letter-spacing:-.4px}.logo-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;color:#fff;box-shadow:0 4px 12px rgba(37,99,235,.35)}.logo span b{color:var(--accent)}.nav-links{display:flex;gap:28px;font-size:14.5px;font-weight:500;color:var(--ink-2)}.nav-links a:hover{color:var(--ink)}.nav-cta{font-size:14px;font-weight:600;background:var(--ink);color:#fff;padding:9px 18px;border-radius:10px;transition:.2s}.nav-cta:hover{background:var(--accent)}@media(max-width:820px){.nav-links{display:none}}.hero{position:relative;padding:84px 0 70px;overflow:hidden}.hero:before{content:"";position:absolute;inset:-40% -20% auto;height:130%;background:radial-gradient(42% 55% at 22% 30%,rgba(37,99,235,.1),transparent 70%),radial-gradient(38% 50% at 78% 22%,rgba(124,58,237,.09),transparent 70%),radial-gradient(30% 40% at 60% 80%,rgba(255,0,51,.05),transparent 70%);pointer-events:none}.hero-inner{position:relative;text-align:center;max-width:820px;margin:0 auto}.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);background:var(--accent-soft);border:1px solid #dbe7ff;padding:6px 14px;border-radius:99px;margin-bottom:22px}.badge .dot{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.18)}h1{font-size:clamp(34px,5.4vw,58px);font-weight:800;letter-spacing:-1.8px;line-height:1.08}h1 .grad{background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.sub{font-size:18px;color:var(--ink-2);margin:20px auto 36px;max-width:560px}.url-box{display:flex;gap:10px;background:var(--surface);border:1.5px solid var(--line);border-radius:16px;padding:10px;max-width:640px;margin:0 auto;box-shadow:var(--shadow-lg);transition:.2s}.url-box:focus-within{border-color:var(--accent)}.url-box .yt-ic{display:grid;place-items:center;padding-left:10px;color:var(--red)}.url-box input{flex:1 1;border:0;outline:0;font-size:16px;background:transparent;color:var(--ink);min-width:0}.url-box input::placeholder{color:var(--ink-3)}.btn-main{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--accent),#3b82f6);color:#fff;font-weight:700;font-size:15px;border:0;padding:13px 24px;border-radius:11px;cursor:pointer;white-space:nowrap;box-shadow:0 6px 18px rgba(37,99,235,.35);transition:.2s}.btn-main:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(37,99,235,.45)}.btn-main:disabled{opacity:.7;cursor:default;transform:none}@media(max-width:600px){.url-box{flex-wrap:wrap}.url-box .yt-ic{padding-left:6px}.url-box input{flex:1 1;min-width:0}.url-box .btn-main{flex:1 1 100%;justify-content:center}}.example-videos{display:flex;align-items:center;justify-content:center;gap:9px;flex-wrap:wrap;max-width:760px;margin:18px auto 0;font-size:13px;color:var(--ink-3)}.example-videos button{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:rgba(255,255,255,.76);color:var(--ink-2);border-radius:99px;padding:8px 13px;font-size:13px;font-weight:600;cursor:pointer;box-shadow:var(--shadow-sm);transition:.15s}.example-videos button:hover{border-color:#cfe0ff;color:var(--accent);background:var(--accent-soft)}.example-videos b{color:var(--ink);font-size:12px}@media(max-width:560px){.example-videos{align-items:stretch}.example-videos span{flex:1 1 100%}.example-videos button{justify-content:center;flex:1 1 100%}}.hero-meta{display:flex;gap:22px;justify-content:center;margin-top:18px;font-size:13.5px;color:var(--ink-3);flex-wrap:wrap}.hero-meta span{display:flex;align-items:center;gap:6px}.hero-meta svg{color:#22c55e}.err-box{max-width:640px;margin:14px auto 0;background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;font-size:14px;padding:12px 18px;border-radius:12px;text-align:left}.float-card{position:absolute;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-md);font-size:12.5px;text-align:left;animation:float 7s ease-in-out infinite}.float-card .t{font-weight:700;font-size:12px;display:flex;align-items:center;gap:6px;margin-bottom:6px}.fc1{left:max(2%,calc(50% - 580px));top:120px;width:200px}.fc1 .t{color:var(--accent)}.fc2{right:max(2%,calc(50% - 580px));top:100px;width:215px;animation-delay:1.6s}.fc2 .t{color:var(--accent-2)}.fc3{right:max(4%,calc(50% - 540px));bottom:30px;width:190px;animation-delay:3.2s}.fc3 .t{color:#059669}.float-card .line{height:7px;border-radius:4px;background:#eef2f8;margin:5px 0}.float-card .line.w70{width:70%}.float-card .line.w50{width:50%}.ts{display:inline-block;background:var(--accent-soft);color:var(--accent);font-weight:600;border-radius:6px;padding:1px 7px;font-size:11px;margin-right:5px}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}@media(max-width:1150px){.float-card{display:none}}.demo{margin:64px auto 0;max-width:880px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-md);overflow:hidden;text-align:left}.demo-head{display:flex;align-items:center;gap:14px;padding:16px 22px;border-bottom:1px solid var(--line);background:#fcfdfe}.demo-thumb{width:92px;height:52px;border-radius:8px;background:linear-gradient(135deg,#1e293b,#475569);position:relative;flex-shrink:0;overflow:hidden}.demo-thumb img{width:100%;height:100%;object-fit:cover}.demo-title{font-weight:700;font-size:15px;letter-spacing:-.2px}.demo-sub{font-size:12.5px;color:var(--ink-3)}.demo-player{position:relative;width:100%;aspect-ratio:16/9;margin-bottom:16px;border-radius:14px;overflow:hidden;background:#000;box-shadow:var(--shadow-sm)}.demo-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.tr-row.active-seg{background:var(--accent-soft);border-radius:8px;box-shadow:inset 3px 0 0 var(--accent)}.tr-row.active-seg .tr-text{color:var(--ink)}@media(min-width:980px){.demo-2col{width:min(1280px,96vw);max-width:none;margin-left:calc(50% - min(640px,48vw));margin-right:calc(50% - min(640px,48vw));display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}.demo-left{position:-webkit-sticky;position:sticky;top:80px;align-self:start;padding:20px;border-right:1px solid var(--line)}.demo-left .demo-player{margin-bottom:14px}.demo-left .demo-head{padding:0;border:0;background:none}.demo-right{min-width:0}.demo-2col .tr-scroll{max-height:62vh}}.tabs{display:flex;flex-wrap:wrap;gap:4px;padding:12px 22px 0;border-bottom:1px solid var(--line)}.tab{font-size:13.5px;font-weight:600;color:var(--ink-3);padding:9px 16px;border-radius:9px 9px 0 0;cursor:pointer;border:0;background:none;border-bottom:2px solid transparent;transition:.15s;white-space:nowrap}.tab.active{color:var(--accent);border-bottom-color:var(--accent);background:var(--accent-soft)}.tab:hover:not(.active){color:var(--ink-2)}.panel{padding:22px;font-size:14px}.tr-scroll{max-height:420px;overflow-y:auto;padding-right:6px}.tr-row{display:flex;gap:14px;padding:9px 4px;border-bottom:1px dashed #eef2f8}.tr-row:last-child{border:0}.tr-time{color:var(--accent);font-weight:600;font-size:12.5px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;flex-shrink:0;padding-top:2px}button.tr-time{background:none;border:0;cursor:pointer;padding:2px 0 0;font-family:inherit}.tr-time:hover{text-decoration:underline}button.ts{border:0;cursor:pointer;font-family:inherit}.tr-text{color:var(--ink-2)}.sum-block h4{font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-3);margin:14px 0 8px}.sum-block h4:first-child{margin-top:0}.key-item,.sum-block p{color:var(--ink-2)}.key-item{display:flex;gap:10px;margin:8px 0}.key-item .n{width:22px;height:22px;border-radius:7px;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12px;display:grid;place-items:center;flex-shrink:0;margin-top:2px}.panel-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}.chip-btn{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);padding:8px 16px;border-radius:9px;cursor:pointer;transition:.15s}.chip-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.chip-btn:disabled{opacity:.6;cursor:default}.panel-empty{padding:36px 22px;text-align:center;color:var(--ink-3);font-size:14px}.tr-toolbar{flex-wrap:wrap;gap:12px;justify-content:space-between;margin-bottom:14px}.tr-search,.tr-toolbar{display:flex;align-items:center}.tr-search{position:relative;flex:1 1 220px;min-width:200px}.tr-search input{width:100%;font:inherit;font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:8px 110px 8px 14px;outline:none;transition:.15s}.tr-search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.tr-search-nav{position:absolute;right:6px;display:flex;align-items:center;gap:4px}.tr-search-count{font-size:12px;color:var(--ink-3);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;margin-right:2px}.tr-search-nav button{width:24px;height:24px;display:grid;place-items:center;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);border-radius:6px;cursor:pointer;font-size:13px;line-height:1;transition:.15s}.tr-search-nav button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.tr-search-nav button:disabled{opacity:.4;cursor:default}.tr-translate{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.tr-translate select{font:inherit;font-size:13px;font-weight:600;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:8px 12px;cursor:pointer;outline:none;transition:.15s}.chip-btn.active,.tr-translate select:focus{border-color:var(--accent)}.chip-btn.active{color:var(--accent)}.chip-btn.active,.tr-note{background:var(--accent-soft)}.tr-note{font-size:12.5px;color:var(--ink-3);border:1px solid #dbe7ff;border-radius:9px;padding:8px 14px;margin-bottom:12px}mark.hl{background:#fef08a;color:inherit;border-radius:3px;padding:0 1px}mark.hl.active{background:#f59e0b;color:#fff}.tr-add{margin-left:auto;flex-shrink:0;width:24px;height:24px;display:grid;place-items:center;border:1px solid var(--line);background:var(--surface);color:var(--ink-3);border-radius:7px;cursor:pointer;font-size:16px;line-height:1;opacity:0;transition:.15s}.tr-row:hover .tr-add{opacity:1}.tr-add:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.tr-add.added{opacity:1;border-color:#16a34a;color:#16a34a;background:#f0fdf4}.tr-add.added:hover{border-color:var(--red);color:var(--red);background:#fef2f2}@media(hover:none){.tr-add{opacity:.55}}.notes-list{display:flex;flex-direction:column;gap:10px;max-height:58vh;overflow-y:auto;padding-right:6px}.note-item{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fcfdfe}.note-body{flex:1 1;min-width:0}.note-text{color:var(--ink-2)}.note-comment{margin-top:6px;width:100%;font:inherit;font-size:13px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:6px 10px;outline:none}.note-comment:focus{border-color:var(--accent)}.note-del{flex-shrink:0;border:0;background:none;color:var(--ink-3);font-size:20px;line-height:1;cursor:pointer;padding:0 2px}.note-del:hover{color:var(--red)}.ins-block h4{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--ink-3);margin-bottom:10px}.ins-chapters{display:flex;flex-direction:column;gap:6px}.ins-chapter{display:flex;gap:10px;align-items:baseline;text-align:left;width:100%;border:1px solid var(--line);background:var(--surface);border-radius:9px;padding:9px 12px;cursor:pointer;font:inherit;color:var(--ink-2);transition:.15s}.ins-chapter:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--ink)}.ins-mgroup{margin-top:12px}.ins-mlabel{font-size:12px;font-weight:600;color:var(--ink-3);margin-bottom:6px}.ins-mlist{display:flex;flex-wrap:wrap;gap:8px}.ins-mention{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--ink-2);background:#f4f7fb;border:1px solid var(--line);border-radius:8px;padding:5px 10px}.tpl-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px}.tpl-bar select{font:inherit;font-size:13px;font-weight:600;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:8px 12px;cursor:pointer;outline:none}.tpl-bar select:focus{border-color:var(--accent)}.tpl-section{margin-bottom:16px}.tpl-section h4{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--ink-3);margin-bottom:8px}.tpl-text{color:var(--ink-2)}.tpl-list{margin:0;padding-left:20px;color:var(--ink-2);gap:5px}.tpl-list,.tpl-pairs{display:flex;flex-direction:column}.tpl-pairs{gap:6px}.tpl-pairs>div{display:flex;gap:8px;flex-wrap:wrap}.tpl-pairs dt{font-weight:600;color:var(--ink)}.tpl-pairs dd{margin:0;color:var(--ink-3)}.tpl-tablewrap{overflow-x:auto}.tpl-table{width:100%;border-collapse:collapse;font-size:13.5px}.tpl-table td,.tpl-table th{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}.tpl-table th{background:#f4f7fb;color:var(--ink-2);font-weight:600}.tpl-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));grid-gap:10px;gap:10px}.flashcard{display:flex;flex-direction:column;gap:6px;text-align:left;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:12px;cursor:pointer;font:inherit;min-height:80px;transition:.15s}.flashcard.open,.flashcard:hover{border-color:var(--accent)}.flashcard.open{background:var(--accent-soft)}.fc-front{font-weight:600;color:var(--ink)}.fc-hint{font-size:12px;color:var(--ink-3)}.fc-back{color:var(--ink-2)}.tpl-quiz{display:flex;flex-direction:column;gap:14px}.quiz-q{font-weight:600;color:var(--ink);margin-bottom:8px}.quiz-opts{display:flex;flex-direction:column;gap:6px}.quiz-opt{text-align:left;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px 12px;cursor:pointer;font:inherit;color:var(--ink-2);transition:.15s}.quiz-opt:hover:not(:disabled){border-color:var(--accent)}.quiz-opt:disabled{cursor:default}.quiz-opt.correct{border-color:#16a34a;background:#f0fdf4;color:#166534;font-weight:600}.quiz-opt.wrong{border-color:var(--red);background:#fef2f2;color:#b91c1c}.topic{padding:48px 24px 72px;max-width:920px}.topic-head{margin-bottom:32px}.topic h1{font-size:clamp(28px,4vw,40px);font-weight:800;letter-spacing:-1px;line-height:1.12}.topic-intro{margin-top:16px;font-size:16px;color:var(--ink-2);max-width:720px}.topic-updated{margin-top:12px;font-size:13px;color:var(--ink-3)}.topic-tool{margin-bottom:36px}.topic-needs{margin-bottom:32px}.topic-needs h2{font-size:20px;font-weight:700;letter-spacing:-.3px;margin-bottom:12px}.needs-tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}.needs-table{width:100%;border-collapse:collapse;font-size:14px}.needs-table td,.needs-table th{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}.needs-table tr:last-child td{border-bottom:0}.needs-table th{background:#f4f7fb;font-weight:600;color:var(--ink-2);font-size:12.5px}.needs-table td:nth-child(2){font-weight:600;color:var(--ink)}.needs-table td:first-child{white-space:nowrap}.topic-channels{display:flex;flex-direction:column;gap:16px}.ch-skip{margin-top:8px;font-size:13px;color:var(--ink-3)}.topic-method-note{margin-top:12px;font-size:13.5px;color:var(--ink-3)}.ch-card{border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow-sm);overflow:hidden}.ch-main{padding:18px 20px}.ch-name{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.3px}.ch-name:hover{color:var(--accent)}.ch-chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.ch-chip{font-size:11.5px;font-weight:600;background:var(--accent-soft);border:1px solid #dbe7ff;border-radius:99px;padding:3px 10px}.ch-best,.ch-chip{color:var(--ink-2)}.ch-best{font-size:14.5px}.ch-videos{border-top:1px solid var(--line);background:#fcfdfe;padding:14px 20px}.ch-videos-head{margin-bottom:10px}.ch-videos-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--ink-3)}.ch-toggle{display:inline-flex;gap:2px;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:2px}.ch-toggle button{font-size:12px;font-weight:600;color:var(--ink-3);background:none;border:0;border-radius:6px;padding:4px 12px;cursor:pointer;transition:.15s}.ch-toggle button.active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow-sm)}.ch-video{display:flex;gap:12px;padding:8px 0;border-bottom:1px dashed #eef2f8}.ch-video:last-child{border:0}.ch-video img{width:120px;height:68px;object-fit:cover;border-radius:8px;flex-shrink:0;background:#e8edf4}.ch-video-body{min-width:0;display:flex;flex-direction:column;gap:3px}.ch-video-title{font-size:14px;font-weight:600;color:var(--ink);line-height:1.35}.ch-video-date{font-size:12px;color:var(--ink-3)}.ch-video-cta{display:inline-flex;align-items:center;gap:4px;align-self:flex-start;margin-top:4px;background:none;border:0;padding:0;font:inherit;font-size:13px;font-weight:600;color:var(--accent);cursor:pointer}.ch-video-cta:hover{text-decoration:underline}.topic-faq,.topic-method{margin-top:40px}.topic-faq h2,.topic-method h2{font-size:22px;font-weight:700;letter-spacing:-.4px;margin-bottom:14px}.topic-method p{color:var(--ink-2);max-width:720px}.topic-faq-item{border:1px solid var(--line);border-radius:10px;background:var(--surface);margin-bottom:8px;overflow:hidden}.topic-faq-item summary{font-size:14.5px;font-weight:600;color:var(--ink);padding:11px 16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}.topic-faq-item summary::-webkit-details-marker{display:none}.topic-faq-item summary:after{content:"+";font-size:18px;font-weight:400;color:var(--ink-3);flex-shrink:0;line-height:1}.topic-faq-item[open] summary:after{content:"−"}.topic-faq-item summary:hover{color:var(--accent)}.topic-faq-item p{color:var(--ink-2);max-width:720px;padding:0 16px 13px;font-size:14px}@media(min-width:720px){.ch-card{display:grid;grid-template-columns:1fr 1fr}.ch-videos{border-top:0;border-left:1px solid var(--line)}}.q-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:34px;max-width:760px;margin-inline:auto}.q-chip{background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:9px 18px;font-size:13.5px;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow-sm)}.chat-list{display:flex;flex-direction:column;gap:10px;max-height:380px;overflow-y:auto;padding:4px 2px}.msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.55}.msg.me{align-self:flex-end;background:linear-gradient(135deg,var(--accent),#3b82f6);color:#fff;border-bottom-right-radius:4px}.msg.ai{align-self:flex-start;background:#f1f5fb;color:var(--ink-2);border-bottom-left-radius:4px;white-space:pre-wrap}.msg.ai .ts{cursor:pointer}.chat-input{display:flex;gap:10px;margin-top:14px}.chat-input input{flex:1 1;border:1.5px solid var(--line);border-radius:11px;padding:11px 16px;font-size:14px;outline:0;background:var(--surface);color:var(--ink);min-width:0}.chat-input input:focus{border-color:var(--accent)}.chat-input .btn-main{padding:11px 22px}section{padding:72px 0}.sec-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--accent);margin-bottom:10px}h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-1px;line-height:1.15}.sec-sub{color:var(--ink-2);font-size:16.5px;margin-top:12px;max-width:540px}.center{text-align:center}.center .sec-sub{margin-inline:auto}.tinted{background:linear-gradient(180deg,transparent,#f3f7fd 30%,#f3f7fd 70%,transparent)}.steps{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:20px;gap:20px;margin-top:44px;text-align:left}.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}.step .num{font-size:13px;font-weight:800;color:var(--accent);background:var(--accent-soft);width:34px;height:34px;border-radius:10px;display:grid;place-items:center;margin-bottom:16px}.step h3{font-size:17px;font-weight:700;margin-bottom:8px;letter-spacing:-.3px}.step p{font-size:14.5px;color:var(--ink-2)}@media(max-width:820px){.steps{grid-template-columns:1fr}}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(205px,1fr));grid-gap:18px;gap:18px;margin-top:44px;text-align:left}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:.2s;box-shadow:var(--shadow-sm);position:relative}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d3e0f5}.tool-ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px}.ic-blue{background:var(--accent-soft);color:var(--accent)}.ic-violet{background:#f3eeff;color:var(--accent-2)}.ic-green{background:#e9f9f1;color:#059669}.ic-amber{background:#fef5e7;color:#d97706}.tool-card h3{font-size:15.5px;font-weight:700;letter-spacing:-.2px;margin-bottom:6px}.tool-card p{font-size:13.5px;color:var(--ink-2)}.tool-card .go{display:inline-flex;align-items:center;gap:5px;margin-top:14px;font-size:13px;font-weight:600;color:var(--accent)}.soon{position:absolute;top:16px;right:16px;font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:#d97706;background:#fef5e7;padding:3px 9px;border-radius:99px}@media(max-width:980px){.tools-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.tools-grid{grid-template-columns:1fr}}.aud{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:18px;gap:18px;margin-top:44px;text-align:left}.aud-card{border-radius:var(--radius);padding:24px;border:1px solid var(--line);background:var(--surface)}.aud-ic{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;margin-bottom:12px;background:var(--accent-soft);color:var(--accent)}.aud-card h3{font-size:15px;font-weight:700;margin-bottom:6px}.aud-card p{font-size:13.5px;color:var(--ink-2)}@media(max-width:980px){.aud{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.aud{grid-template-columns:1fr}}.guides{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:18px;gap:18px;margin-top:44px;text-align:left}.guide-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;box-shadow:var(--shadow-sm)}.guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.guide-img{height:130px;display:grid;place-items:center}.guide-img svg{opacity:.85}.gi-1{background:linear-gradient(135deg,#dbeafe,#ede9fe);color:var(--accent)}.gi-2{background:linear-gradient(135deg,#fee2e2,#fef3c7);color:#dc2626}.gi-3{background:linear-gradient(135deg,#d1fae5,#dbeafe);color:#059669}.guide-body{padding:20px 22px}.guide-tag{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--accent)}.guide-body h3{font-size:16px;font-weight:700;letter-spacing:-.3px;margin:8px 0 6px;line-height:1.35}.guide-body p{font-size:13.5px;color:var(--ink-2)}@media(max-width:820px){.guides{grid-template-columns:1fr}}.faq{max-width:720px;margin:44px auto 0;text-align:left}details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin-bottom:12px}details summary{font-weight:600;font-size:15px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}details summary:after{content:"+";font-size:20px;color:var(--ink-3);transition:.2s}details[open] summary:after{transform:rotate(45deg)}details p{margin-top:10px;font-size:14px;color:var(--ink-2)}.free-list{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px 24px;gap:14px 24px;margin:40px auto 0;max-width:880px;text-align:left}.free-list span{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:13px 18px;font-size:14px;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow-sm)}.free-list svg{color:#22c55e;flex-shrink:0}@media(max-width:980px){.free-list{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.free-list{grid-template-columns:1fr}}.compare{display:grid;grid-template-columns:1fr 1fr;grid-gap:18px;gap:18px;margin:44px auto 0;max-width:920px;text-align:left}.compare-col{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:var(--surface);box-shadow:var(--shadow-sm)}.compare-col h3{font-size:16px;font-weight:800;letter-spacing:-.3px;margin-bottom:14px}.compare-col ul{list-style:none;display:grid;grid-gap:11px;gap:11px}.compare-col li{font-size:14px;color:var(--ink-2)}.compare-col.featured{border-color:#cfe0ff;background:linear-gradient(180deg,#fff,#f7faff)}.compare-col.featured h3{color:var(--accent)}.compare-col.featured li{display:flex;align-items:flex-start;gap:9px;font-weight:600}.compare-col.featured svg{color:#22c55e;flex-shrink:0;margin-top:3px}.compare-col.muted li{position:relative;padding-left:18px}.compare-col.muted li:before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--ink-3)}@media(max-width:760px){.compare{grid-template-columns:1fr}}.seo-matrix{max-width:980px;margin:26px auto 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-sm);text-align:left}.seo-matrix-row{display:grid;grid-template-columns:1.05fr 1fr 1fr}.seo-matrix-row span{padding:13px 16px;border-right:1px solid var(--line);border-bottom:1px solid #eef2f8;font-size:13.5px;color:var(--ink-2)}.seo-matrix-row span:last-child{border-right:0;font-weight:600;color:var(--ink)}.seo-matrix-row:last-child span{border-bottom:0}.seo-matrix-row.head{background:#fcfdfe}.seo-matrix-row.head span{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.7px;color:var(--ink-3)}@media(max-width:760px){.seo-matrix{border-radius:14px}.seo-matrix-row{grid-template-columns:1fr}.seo-matrix-row.head{display:none}.seo-matrix-row{border-bottom:1px solid var(--line);padding:12px 14px}.seo-matrix-row:last-child{border-bottom:0}.seo-matrix-row span{border:0;padding:2px 0;font-size:13.5px}.seo-matrix-row span:first-child{font-weight:800;color:var(--ink)}.seo-matrix-row span:nth-child(2):before{content:"Manual: ";font-weight:700;color:var(--ink-3)}.seo-matrix-row span:nth-child(3):before{content:"InsightsTube: ";font-weight:700;color:var(--accent)}}.prompt-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px;margin-top:44px;text-align:left}.prompt-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}.prompt-tag{display:inline-flex;font-size:11px;font-weight:800;letter-spacing:.7px;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:99px;padding:4px 10px;margin-bottom:12px}.prompt-card h3{font-size:15.5px;font-weight:800;letter-spacing:-.2px;margin-bottom:7px}.prompt-card p{font-size:13.5px;color:var(--ink-2)}.prompt-example{margin-top:14px;border:1px solid #e1e8f4;background:#fcfdfe;border-radius:12px;padding:12px 13px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.55;color:#334155}@media(max-width:980px){.prompt-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.prompt-grid{grid-template-columns:1fr}}.format-row{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:14px;gap:14px;margin:40px auto 0;max-width:900px;text-align:left}.format-pill{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow-sm)}.format-pill b{display:block;color:var(--ink);font-size:18px;letter-spacing:-.3px;margin-bottom:3px}.format-pill span{display:block;color:var(--ink-2);font-size:13.5px}.language-strip{max-width:880px;margin:18px auto 0;border:1px solid #dbe7ff;background:var(--accent-soft);border-radius:14px;padding:14px 18px;color:var(--ink-2);font-size:14px;font-weight:600}@media(max-width:820px){.format-row{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.format-row{grid-template-columns:1fr}}.g-article{max-width:760px;margin:0 auto;padding:56px 24px 50px}.g-crumbs{font-size:13px;margin-bottom:16px}.g-crumbs,.g-crumbs a{color:var(--ink-3)}.g-cat,.g-crumbs a:hover{color:var(--accent)}.g-cat{display:inline-block;font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;background:var(--accent-soft);border-radius:99px;padding:4px 12px;margin-bottom:14px}.g-article h1{font-size:clamp(30px,4vw,40px);letter-spacing:-1.2px;line-height:1.15;margin-bottom:14px}.g-article .lead{font-size:17.5px;color:var(--ink-2);margin-bottom:14px}.g-article h2{font-size:24px;letter-spacing:-.6px;margin:42px 0 14px}.g-article h3{font-size:18px;margin:28px 0 10px}.g-article li,.g-article p{font-size:15.5px;color:var(--ink-2)}.g-article p{margin-bottom:13px}.g-article ol,.g-article ul{padding-left:24px;margin-bottom:14px}.g-article li{margin-bottom:7px}.g-article a{color:var(--accent)}.g-article a.btn-main{color:#fff}.g-article b{color:var(--ink)}figure.g-fig{margin:30px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}figure.g-fig figcaption{font-size:12.5px;color:var(--ink-3);text-align:center;margin-top:16px}.g-img-fig{padding:0;overflow:hidden}.g-img-fig img{display:block;width:100%;height:auto;background:#f8fafc}.g-img-fig figcaption{padding:0 18px 18px}.g-code{margin:18px 0 22px;background:#0f172a;color:#cbd5e1;border-radius:14px;padding:18px 20px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.7;white-space:pre-wrap;overflow-x:auto}.g-choose{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px;gap:14px}.g-choose .opt{border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}.g-choose .need{font-size:12.5px;color:var(--ink-3);min-height:36px}.g-choose .arrow{color:var(--accent);font-size:18px;margin:8px 0}.g-choose .method{font-size:13.5px;font-weight:700;color:var(--ink);background:var(--accent-soft);border-radius:9px;padding:8px 10px}@media(max-width:640px){.g-choose{grid-template-columns:1fr}.g-choose .need{min-height:auto}}.g-yt{display:grid;grid-template-columns:1.4fr 1fr;grid-gap:14px;gap:14px}.g-yt .player{background:linear-gradient(135deg,#1e293b,#475569);border-radius:12px;aspect-ratio:16/9;position:relative}.g-yt .player:after{content:"";position:absolute;inset:0;margin:auto;width:0;height:0;border-left:26px solid rgba(255,255,255,.9);border-top:16px solid transparent;border-bottom:16px solid transparent}.g-yt .under{display:flex;align-items:center;gap:8px;margin-top:10px}.g-yt .pill{flex:1 1}.g-yt .dots,.g-yt .pill{height:26px;border-radius:99px;background:#eef2f8}.g-yt .dots{width:34px;display:grid;place-items:center;font-weight:800;color:var(--ink-2);letter-spacing:1px;font-size:13px}.g-yt .menu{margin-top:8px;border:1px solid var(--line);border-radius:10px;overflow:hidden;width:max-content;box-shadow:var(--shadow-md);background:var(--surface)}.g-yt .menu div{padding:8px 14px;font-size:13px;color:var(--ink-2)}.g-yt .menu .hl{background:var(--accent-soft);color:var(--accent);font-weight:700}.g-yt .panel{border:1px solid var(--line);border-radius:12px;padding:14px;background:#fcfdfe}.g-yt .panel .ph{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-3);margin-bottom:8px}.g-yt .prow{display:flex;gap:10px;padding:6px 0;border-bottom:1px dashed #eef2f8;font-size:12.5px;color:var(--ink-2)}.g-yt .prow:last-child{border:0}.g-yt .pt{color:var(--accent);font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}@media(max-width:640px){.g-yt{grid-template-columns:1fr}}.g-fmt{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px;gap:14px}.g-fmt .file{border:1px solid var(--line);border-radius:14px;overflow:hidden}.g-fmt .fname{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#fcfdfe;border-bottom:1px solid var(--line);font-weight:700;font-size:13.5px}.g-fmt .fname .ext{margin-left:auto;font-size:10.5px;font-weight:800;color:#fff;border-radius:6px;padding:2px 8px}.g-fmt .e-txt{background:var(--accent)}.g-fmt .e-srt{background:var(--accent-2)}.g-fmt .e-vtt{background:#059669}.g-fmt pre{margin:0;padding:12px 14px;font-size:10.5px;line-height:1.55;color:var(--ink-2);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;min-height:110px}.g-fmt .best{padding:10px 14px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3)}.g-fmt .best b{color:var(--ink)}@media(max-width:640px){.g-fmt{grid-template-columns:1fr}}.g-flow{display:flex;flex-direction:column;gap:0;max-width:480px;margin:0 auto}.g-flow .node{border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:13.5px;color:var(--ink-2);background:var(--surface);text-align:center}.g-flow .node b{color:var(--ink)}.g-flow .node.q{background:var(--accent-soft);border-color:#dbe7ff;color:var(--accent);font-weight:700}.g-flow .down{text-align:center;color:var(--ink-3);font-size:16px;padding:4px 0}.g-flow .down span{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;margin-left:6px}.g-cmp{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px}.g-cmp .side{border-radius:14px;padding:16px;border:1px solid var(--line)}.g-cmp .side.good{background:#f3fbf6;border-color:#c6ecd4}.g-cmp .side.bad{background:#fef5f5;border-color:#f4cccc}.g-cmp .lbl{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}.g-cmp .good .lbl{color:#059669}.g-cmp .bad .lbl{color:#dc2626}.g-cmp p{font-size:13.5px;margin:0}@media(max-width:640px){.g-cmp{grid-template-columns:1fr}}.g-note{max-width:430px;margin:0 auto;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-md)}.g-note .nh{padding:12px 16px;background:#fcfdfe;border-bottom:1px solid var(--line);font-weight:700;font-size:13.5px}.g-note .nb{padding:14px 16px}.g-note .row{display:flex;gap:10px;margin-bottom:9px;font-size:12.5px}.g-note .k{flex-shrink:0;width:110px;font-weight:700;color:var(--ink-3);text-transform:uppercase;font-size:10.5px;letter-spacing:.5px;padding-top:2px}.g-note .v{color:var(--ink-2)}.g-note .v .ts{font-size:10.5px}.g-prompt{background:#0f172a;border-radius:14px;padding:18px 20px;color:#cbd5e1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.7;white-space:pre-wrap;position:relative}.g-prompt .ph{position:absolute;top:10px;right:14px;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:#64748b}.g-table{width:100%;border-collapse:collapse;font-size:13.5px}.g-table th{text-align:left;font-size:11.5px;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-3);padding:8px 12px;border-bottom:2px solid var(--line)}.g-table td{padding:10px 12px;border-bottom:1px solid #eef2f8;color:var(--ink-2);vertical-align:top}.g-table td:first-child{font-weight:700;color:var(--ink);white-space:nowrap}.g-cta{display:flex;align-items:center;justify-content:space-between;gap:18px;background:linear-gradient(135deg,var(--accent-soft),#f3eeff);border:1px solid #dbe7ff;border-radius:var(--radius);padding:22px 26px;margin:36px 0}.g-cta .t{font-weight:800;font-size:17px;letter-spacing:-.3px}.g-cta .s{font-size:13.5px;color:var(--ink-2);margin-top:4px}.g-cta .btn-main{flex-shrink:0}@media(max-width:640px){.g-cta{flex-direction:column;align-items:flex-start}}.g-index{max-width:1180px;margin:0 auto;padding:64px 24px 40px}.g-index h1{font-size:clamp(30px,4vw,44px);letter-spacing:-1.2px}.g-index .sub{color:var(--ink-2);margin:12px 0 40px;max-width:540px}.page{max-width:760px;margin:0 auto;padding:64px 24px 80px}.page h1{font-size:clamp(30px,4vw,42px);margin-bottom:8px}.page .page-sub{color:var(--ink-3);font-size:14px;margin-bottom:36px}.page h2{font-size:22px;margin:36px 0 12px}.page li,.page p{color:var(--ink-2);font-size:15.5px;margin-bottom:12px}.page ul{padding-left:22px;margin-bottom:12px}.page a{color:var(--accent)}.contact-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:24px 0;box-shadow:var(--shadow-sm)}.contact-card .ic{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex-shrink:0}.contact-card a{font-weight:700;font-size:17px;color:var(--ink)}.contact-card a:hover{color:var(--accent)}.contact-card .hint{font-size:13px;color:var(--ink-3)}.final-cta{background:linear-gradient(135deg,#0f172a,#1e293b);border-radius:24px;padding:60px 40px;text-align:center;color:#fff;position:relative;overflow:hidden}.final-cta:before{content:"";position:absolute;inset:0;background:radial-gradient(50% 80% at 50% 0,rgba(37,99,235,.35),transparent 70%)}.final-cta h2{color:#fff;position:relative}.final-cta p{color:#cbd5e1;margin:14px 0 28px;position:relative}footer{border-top:1px solid var(--line);padding:48px 0 36px;margin-top:80px;font-size:13.5px;color:var(--ink-2)}.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;grid-gap:32px;gap:32px}.foot-grid h4{font-size:13px;font-weight:700;color:var(--ink);margin-bottom:12px}.foot-grid a{display:block;margin:7px 0;color:var(--ink-2)}.foot-grid a:hover{color:var(--accent)}.foot-note{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--ink-3);font-size:12.5px}@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}