:root{--bg: #f6f7fb;--surface: #ffffff;--ink: #696ea6;--muted: #6b7280;--line: #e7e9f2;--brand-1: #5daeec;--brand-2: #7c5bff;--brand-soft: #5868b1;--danger: #e5484d;--radius: 18px;--shadow: 0 10px 30px rgba(20, 22, 43, .08);--shadow-sm: 0 2px 10px rgba(20, 22, 43, .05)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:Segoe UI,Tahoma,system-ui,-apple-system,sans-serif;background:radial-gradient(1200px 600px at 80% -10%,#eef1ff 0%,var(--bg) 45%);color:var(--ink);min-height:100vh}.app{display:flex;flex-direction:column;min-height:100vh}.nav{position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffb8;border-bottom:1px solid var(--line)}.nav-inner{max-width:1040px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;font-size:16px}.nav-links{display:flex;gap:6px}.nav-links button{border:none;background:transparent;cursor:pointer;font-family:inherit;font-size:15px;color:var(--muted);padding:8px 16px;border-radius:10px;transition:.15s}.nav-links button:hover{color:var(--ink);background:var(--brand-soft)}.nav-links button.active{color:#fff;background:linear-gradient(135deg,var(--brand-1),var(--brand-2))}.container{width:100%;max-width:1040px;margin:0 auto;padding:40px 24px;flex:1}.hero{text-align:center;margin-bottom:36px}.badge{display:inline-block;font-size:13px;font-weight:600;color:var(--brand-2);background:var(--brand-soft);padding:6px 14px;border-radius:999px;margin-bottom:16px}.hero-title{font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{margin-top:10px;color:var(--muted);font-size:17px;direction:ltr}.panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:22px}.card-label{display:block;font-size:14px;font-weight:700;color:var(--muted);margin-bottom:12px}textarea{width:100%;resize:vertical;min-height:160px;border:1px solid var(--line);border-radius:12px;background:#fbfbfe;color:var(--ink);font-family:inherit;font-size:17px;padding:14px;line-height:1.6;transition:border-color .15s,box-shadow .15s}textarea:focus{outline:none;border-color:var(--brand-1);box-shadow:0 0 0 4px var(--brand-soft)}.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;gap:12px}.counter{font-size:13px;color:var(--muted)}.btn-primary{border:none;cursor:pointer;font-family:inherit;font-size:15px;font-weight:700;color:#fff;padding:12px 22px;border-radius:12px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));box-shadow:var(--shadow);transition:transform .12s,opacity .15s}.btn-primary:hover{transform:translateY(-1px)}.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none}.btn-ghost{border:1px solid var(--line);background:transparent;cursor:pointer;font-family:inherit;font-size:14px;color:var(--muted);padding:8px 16px;border-radius:10px;transition:.15s}.btn-ghost:hover{color:var(--danger);border-color:var(--danger)}.alert{margin-top:14px;padding:12px 14px;border-radius:10px;font-size:14px;color:var(--danger);background:#e5484d14;border:1px solid rgba(229,72,77,.2)}.video-card{display:flex;align-items:center;justify-content:center;min-height:320px;padding:14px}.video-card video{width:100%;border-radius:12px;background:#0b0d18;display:block}.video-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--muted);width:100%;min-height:290px;font-size:15px}.video-state.placeholder{border:2px dashed var(--line);border-radius:12px;background:#fbfbfe}.placeholder-icon{font-size:34px;opacity:.7}.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--brand-soft);border-top-color:var(--brand-2);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.section-head h2{font-size:24px;font-weight:800}.empty{color:var(--muted);text-align:center;padding:56px}.history-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}.history-card{padding:0;overflow:hidden}.history-card video{width:100%;display:block;background:#0b0d18}.history-meta{padding:14px 16px}.history-text{font-size:15px;font-weight:600;margin-bottom:4px}.history-time{font-size:12px;color:var(--muted)}.footer{text-align:center;color:var(--muted);font-size:13px;padding:28px;border-top:1px solid var(--line)}.footer-note{margin-top:6px;font-size:12px;opacity:.8}.video-wrap{width:100%;display:flex;flex-direction:column;gap:14px}.speed-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fbfbfe}.speed-label{font-size:13px;font-weight:700;color:var(--muted)}.speed-slider{flex:1;min-width:120px;accent-color:var(--brand-2);cursor:pointer}.speed-value{font-size:13px;font-weight:700;color:var(--ink);min-width:48px;text-align:center}.speed-presets{display:flex;gap:6px}.speed-chip{border:1px solid var(--line);background:var(--surface);cursor:pointer;font-family:inherit;font-size:12px;font-weight:600;color:var(--muted);padding:5px 10px;border-radius:8px;transition:.15s}.speed-chip:hover{color:var(--ink);border-color:var(--brand-1)}.speed-chip.active{color:#fff;border-color:transparent;background:linear-gradient(135deg,var(--brand-1),var(--brand-2))}.home{display:flex;flex-direction:column;gap:48px}.home-hero{text-align:center;padding:32px 0 4px}.home-hero .btn-primary{margin-top:22px}.roadmap{width:100%;max-width:620px;margin:0 auto;padding-bottom:16px}.roadmap-title{font-size:24px;font-weight:800;text-align:center;margin-bottom:28px}.roadmap-list{list-style:none;position:relative;margin:0;padding:0}.roadmap-list:before{content:"";position:absolute;top:8px;bottom:8px;right:7px;width:2px;background:var(--line)}.roadmap-item{position:relative;padding:0 32px 26px 0}.roadmap-item:last-child{padding-bottom:0}.roadmap-dot{position:absolute;right:0;top:2px;width:16px;height:16px;border-radius:50%;background:var(--surface);border:2px solid var(--line)}.roadmap-item.done .roadmap-dot{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));border-color:transparent}.roadmap-item-title{font-size:15px;font-weight:700;color:var(--ink)}.roadmap-item.todo .roadmap-item-title{color:var(--muted)}.roadmap-date{font-size:13px;color:var(--muted);margin-top:2px}@media(max-width:720px){.panel-grid{grid-template-columns:1fr}.hero-title{font-size:30px}}