*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f1117;--surface: #13161f;--card: #1a1f2e;--border: #1e2535;--text: #f1f5f9;--muted: #94a3b8;--dim: #64748b;--accent: #3137ED;--accent-bg: #1e2150;--accent-text: #818cf8;--green: #22c55e;--green-bg: rgba(34,197,94,.12);--shadow: 0 4px 24px rgba(0,0,0,.4)}[data-theme=light]{--bg: #ffffff;--surface: #fafafb;--card: #ffffff;--border: #e4e4e7;--text: #09090b;--muted: #52525b;--dim: #a1a1aa;--accent: #3137ED;--accent-bg: #eef0fe;--accent-text: #2126b8;--green: #16a34a;--green-bg: #dcfce7;--shadow: 0 4px 24px rgba(0,0,0,.06)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}.brand-logo{height:38px;width:auto;flex-shrink:0}.brand-logo-dtop{height:28px;width:auto;flex-shrink:0}[data-theme=light] .brand-logo,[data-theme=light] .brand-logo-dtop{filter:invert(1) brightness(.4)}.brand-tag{font-size:.65rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.14em;margin-left:4px}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.header{display:flex;align-items:center;justify-content:space-between;padding:0 40px;height:84px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.header-left{display:flex;flex-direction:column;align-items:flex-start;gap:2px;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.header-title{font-size:1rem;font-weight:700;color:var(--text);line-height:1.2}.header-subtitle{font-size:.72rem;color:var(--dim);text-transform:uppercase;letter-spacing:.06em}.header-right{display:flex;align-items:center;gap:8px}.theme-btn{background:var(--card);border:1px solid var(--border);color:var(--muted);padding:5px 12px;border-radius:8px;cursor:pointer;font-size:.8rem;display:flex;align-items:center;gap:5px;transition:all .15s}.theme-btn:hover{border-color:var(--accent);color:var(--accent-text)}.home-wrap{max-width:980px;margin:0 auto;padding:52px 40px}.home-hero{margin-bottom:52px}.home-title{font-size:2.25rem;font-weight:800;color:var(--text);margin-bottom:10px}.home-sub{font-size:1rem;color:var(--muted)}.home-cat{margin-bottom:44px}.cat-label{font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:16px;display:block}.cards-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}@media (max-width: 640px){.cards-grid{grid-template-columns:1fr}}.card{display:flex;align-items:center;gap:16px;padding:16px 20px;background:var(--card);border:1px solid var(--border);border-radius:10px;cursor:pointer;text-align:left;color:inherit;width:100%;overflow:hidden;transition:all .15s}.card:hover{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.card-icon{width:42px;height:42px;border-radius:8px;background:var(--accent-bg);color:var(--accent-text);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}.card-body{flex:1;min-width:0}.card-title{font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:2px}.card-desc{font-size:.78rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.card-dur{font-size:.72rem;color:var(--dim);margin-top:5px}.card-arrow{color:var(--dim);font-size:1.3rem;flex-shrink:0}.dtop{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.dtop-brand{display:flex;flex-direction:column;align-items:flex-start;gap:1px;cursor:pointer;font-size:.9rem;font-weight:600;color:var(--muted);-webkit-user-select:none;-moz-user-select:none;user-select:none}.dtop-brand:hover{color:var(--text)}.dlayout{display:flex;height:calc(100vh - 56px)}.sidebar{width:260px;min-width:260px;background:var(--surface);border-right:1px solid var(--border);overflow-y:auto;flex-shrink:0}.sb-back{display:block;padding:14px 20px;font-size:.8rem;color:var(--muted);cursor:pointer;border-bottom:1px solid var(--border)}.sb-back:hover{color:var(--text)}.sb-cat{width:100%;display:flex;justify-content:space-between;align-items:center;padding:10px 20px 6px;background:none;border:none;color:var(--dim);font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;text-align:left}.sb-cat:hover{color:var(--muted)}.sb-chevron{font-size:.9rem;display:inline-block;transition:transform .2s}.sb-chevron.open{transform:rotate(90deg)}.sb-item{display:block;width:100%;text-align:left;padding:8px 20px 8px 28px;background:none;border:none;border-left:2px solid transparent;color:var(--muted);font-size:.85rem;cursor:pointer;transition:all .15s;line-height:1.4}.sb-item:hover{color:var(--text);background:var(--card)}.sb-item.active{color:var(--accent-text);background:var(--accent-bg);border-left-color:var(--accent);font-weight:500}.dmain{flex:1;overflow-y:auto;padding:40px 52px 60px}.dmain-inner{max-width:860px}.breadcrumb{font-size:.78rem;color:var(--dim);margin-bottom:18px;display:flex;align-items:center;gap:8px}.bc-link{cursor:pointer}.bc-link:hover{color:var(--muted)}.badge{display:inline-block;padding:3px 10px;border-radius:20px;background:var(--green-bg);color:var(--green);font-size:.72rem;font-weight:600;margin-bottom:14px}.detail-h1{font-size:1.8rem;font-weight:800;color:var(--text);margin-bottom:8px;line-height:1.2}.detail-desc{font-size:.95rem;color:var(--muted);line-height:1.65;margin-bottom:28px}.video-wrap{margin-bottom:36px}.video-wrap video{width:100%;border-radius:10px;box-shadow:var(--shadow);display:block}.steps{margin-bottom:40px}.steps-h{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:16px}.steps-list{list-style:none;display:flex;flex-direction:column;gap:12px}.step{display:flex;align-items:flex-start;gap:14px}.step-n{width:28px;height:28px;border-radius:50%;background:var(--accent-bg);color:var(--accent-text);display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;flex-shrink:0;margin-top:2px}.step-t{font-size:.9rem;color:var(--muted);line-height:1.6}.dnav{display:flex;justify-content:space-between;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}.dnav-btn{padding:8px 16px;border-radius:8px;background:var(--card);border:1px solid var(--border);color:var(--muted);cursor:pointer;font-size:.83rem;transition:all .15s;max-width:220px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.dnav-btn:hover{border-color:var(--accent);color:var(--accent-text)}