:root{--bg:#49568b;--bg-elev:#6163a6;--bg-card:#6574b2;--border:#748df1;--text:#b1e4ea;--text-dim:#b1e4ea;--accent:#e99652;--accent-2:#748df1;--accent-glow:#7477e8;--nav-bg:rgba(54,59,80,0.9);--hero-mask-a:rgba(54,59,80,0.88);--hero-mask-b:rgba(54,59,80,0.72);--success:#34d399;--warning:#fbbf24;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:999px;--shadow-sm:0 1px 2px rgba(0,0,0,0.25);--shadow-md:0 6px 20px -6px rgba(0,0,0,0.45);--shadow-lg:0 16px 48px -12px rgba(0,0,0,0.6);--shadow-accent:0 8px 24px -8px var(--accent-glow);--border-soft:color-mix(in srgb,var(--accent) 18%,var(--border));--bg-hover:color-mix(in srgb,var(--accent) 8%,transparent);--accent-grad:linear-gradient(135deg,var(--accent),var(--accent-2))}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-feature-settings:"kern","liga";letter-spacing:-.01em}a{color:var(--accent-2);text-decoration:none;transition:color .15s ease}a:hover{color:var(--text)}h1,h2,h3{text-wrap:balance;letter-spacing:-.02em}.container{width:100%;max-width:100%;margin:0 auto;padding:0 24px}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(16px) saturate(1.5);-webkit-backdrop-filter:blur(16px) saturate(1.5);border-bottom:1px solid var(--border)}.nav:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,transparent,var(--accent-glow),transparent);opacity:.6;pointer-events:none}.nav-inner{width:100%;max-width:100%;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}.nav-logo{font-weight:900;font-size:1.05rem;color:var(--text);letter-spacing:.01em;display:inline-flex;align-items:center;gap:6px}.nav-logo span{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;gap:4px;flex-wrap:wrap;align-items:center}.nav-links a{color:var(--text-dim);font-size:.9rem;font-weight:500;padding:6px 11px;border-radius:var(--radius-sm);transition:color .15s ease,background .15s ease}.nav-links a:hover{text-decoration:none}.nav-links .nav-active,.nav-links a:hover{color:var(--text);background:var(--bg-hover)}.lang-switch{margin-left:auto;display:inline-flex;align-items:center;gap:8px;padding:4px 10px;border:1px solid var(--border);border-radius:var(--radius-full);font-size:.82rem;font-weight:600;background:color-mix(in srgb,var(--bg-card) 70%,transparent)}.lang-switch a{color:var(--text-dim);padding:2px 4px}.lang-switch a:hover{color:var(--text);text-decoration:none}.lang-switch a.on{color:var(--text)}.hero{position:relative;padding:84px 0 72px;background:linear-gradient(var(--hero-mask-a),var(--hero-mask-b)),var(--hero-image,none),radial-gradient(ellipse 900px 480px at 18% -10%,var(--accent-glow),transparent 60%),radial-gradient(ellipse 700px 380px at 85% 5%,color-mix(in srgb,var(--accent-2) 14%,transparent),transparent 60%);background-size:cover;background-position:50%;border-bottom:1px solid var(--border)}.hero:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,transparent,var(--accent-glow),transparent);opacity:.5;pointer-events:none}.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent-2);border:1px solid var(--border-soft);border-radius:var(--radius-full);background:color-mix(in srgb,var(--accent) 10%,transparent);padding:6px 14px;margin-bottom:20px}.hero-eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-grad);box-shadow:0 0 10px var(--accent-glow)}.hero h1{font-size:clamp(2.4rem,5.5vw,3.6rem);font-weight:900;letter-spacing:-.03em;line-height:1.08;background:linear-gradient(90deg,var(--text) 0,var(--accent) 60%,var(--accent-2) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero .sub{color:var(--text-dim);margin-top:10px;font-size:1.05rem;font-weight:500}.hero-desc{margin-top:18px;max-width:640px;color:var(--text-dim);font-size:1.02rem}.stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.stat{background:color-mix(in srgb,var(--bg-card) 85%,transparent);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 16px;display:flex;flex-direction:column;gap:2px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);box-shadow:var(--shadow-sm)}.stat b{font-size:1.1rem;letter-spacing:-.01em}.stat span{font-size:.74rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.6px}.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.cta{display:inline-flex;align-items:center;gap:8px;background:var(--accent-grad);color:#fff;font-weight:700;padding:12px 22px;border-radius:var(--radius-md);font-size:.95rem;box-shadow:var(--shadow-accent);transition:transform .15s ease,box-shadow .15s ease,filter .15s ease}.cta:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 12px 30px -8px var(--accent-glow);filter:brightness(1.05)}.cta:active{transform:translateY(0)}.cta.ghost{background:color-mix(in srgb,var(--bg-card) 60%,transparent);border:1px solid var(--border);color:var(--text);box-shadow:none;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.cta.ghost:hover{border-color:var(--border-soft);background:var(--bg-hover);filter:none}.section{padding:44px 0}.section h2{position:relative;font-size:1.5rem;font-weight:800;letter-spacing:-.02em;margin-bottom:22px;padding-left:14px}.section h2:before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--accent-grad)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:18px;gap:18px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;border-radius:var(--radius-lg) var(--radius-lg) 0 0;background:var(--accent-grad);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}.card:hover:before{transform:scaleX(1)}.card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 45%,var(--border));box-shadow:var(--shadow-md)}.card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;letter-spacing:-.01em}.card h3 a{color:var(--text)}.card h3 a:hover{color:var(--accent-2)}.card p{color:var(--text-dim);font-size:.9rem}.card .tag{display:inline-block;font-size:.68rem;font-weight:700;color:var(--accent-2);margin-bottom:10px;text-transform:uppercase;letter-spacing:.8px;background:color-mix(in srgb,var(--accent) 12%,transparent);border:1px solid var(--border-soft);border-radius:var(--radius-full);padding:2px 10px}.task-grid a.cta{justify-content:center;text-align:center}.task-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.task-grid a.cta{padding:14px 16px;font-size:.92rem}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:16px;gap:16px}.step{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;transition:transform .18s ease,border-color .18s ease}.step:hover{transform:translateY(-2px);border-color:var(--border-soft)}.step .num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;font-size:1.1rem;font-weight:900;color:#fff;background:var(--accent-grad);box-shadow:var(--shadow-accent)}.step h3{margin:12px 0 6px;font-size:1.05rem}.step p{color:var(--text-dim);font-size:.9rem}.prose{max-width:880px}.prose h1{font-size:clamp(1.9rem,4vw,2.4rem);font-weight:900;margin-bottom:20px;letter-spacing:-.025em}.prose h2{position:relative;font-size:1.4rem;font-weight:800;margin:40px 0 14px;padding-bottom:12px;letter-spacing:-.02em}.prose h2:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 40%,transparent),transparent 70%)}.prose h3{font-size:1.12rem;font-weight:700;margin:22px 0 8px}.prose p{margin:12px 0;color:var(--text-dim)}.prose strong{color:var(--text);font-weight:700}.prose ol,.prose ul{margin:12px 0 12px 22px;color:var(--text-dim)}.prose li{margin:7px 0}.prose li::marker{color:var(--accent)}.prose a:hover{text-decoration:underline}.prose code{background:var(--bg-elev);border:1px solid var(--border);border-radius:6px;padding:1px 7px;font-size:.88em;font-family:ui-monospace,SFMono-Regular,SF Mono,Consolas,Liberation Mono,Menlo,monospace;color:var(--accent-2)}.prose blockquote{border-left:3px solid var(--accent);padding:8px 18px;margin:18px 0;background:var(--bg-elev);border-radius:0 var(--radius-md) var(--radius-md) 0;color:var(--text-dim)}.prose .callout{background:color-mix(in srgb,var(--accent) 10%,var(--bg-card));border:1px solid var(--border-soft);border-left:4px solid var(--accent);border-radius:var(--radius-md);padding:16px 20px;margin:20px 0}.prose .callout strong{color:var(--text)}.data-table-wrap{overflow-x:auto;margin:16px 0;border-radius:var(--radius-md)}.data-table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;font-size:.92rem}.data-table td,.data-table th{border-bottom:1px solid var(--border);padding:12px 14px;text-align:left;vertical-align:top}.data-table th{background:color-mix(in srgb,var(--bg-elev) 75%,transparent);color:var(--text);font-weight:700;letter-spacing:.01em;white-space:nowrap}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr{transition:background .12s ease}.data-table tbody tr:hover td{background:color-mix(in srgb,var(--accent) 6%,transparent)}.data-table td strong{color:var(--text)}.data-table td{color:var(--text-dim)}.code-item{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 18px;margin-bottom:10px;transition:border-color .15s ease,transform .15s ease}.code-item:hover{border-color:var(--border-soft);transform:translateX(2px)}.code-item code{font-size:1.05rem;color:var(--accent-2);font-weight:700;font-family:ui-monospace,SFMono-Regular,SF Mono,Consolas,Liberation Mono,Menlo,monospace}.code-item .reward{color:var(--text-dim);font-size:.88rem}.badge{display:inline-block;font-size:.68rem;font-weight:800;text-transform:uppercase;padding:3px 9px;border-radius:var(--radius-full);letter-spacing:.5px;vertical-align:middle}.badge.new{background:color-mix(in srgb,var(--success) 15%,transparent);color:var(--success);border:1px solid color-mix(in srgb,var(--success) 35%,transparent)}.badge.expired{background:color-mix(in srgb,var(--warning) 15%,transparent);color:var(--warning);border:1px solid color-mix(in srgb,var(--warning) 35%,transparent)}.copy-btn{background:var(--accent-grad);color:#fff;border:none;border-radius:var(--radius-md);padding:9px 18px;font-weight:700;font-size:.88rem;cursor:pointer;box-shadow:var(--shadow-accent);transition:transform .15s ease,box-shadow .15s ease,filter .15s ease}.copy-btn:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 10px 24px -8px var(--accent-glow)}.copy-btn:active{transform:translateY(0)}.hero-img{width:100%;max-height:320px;object-fit:cover;border-radius:var(--radius-lg);border:1px solid var(--border);margin-top:24px;box-shadow:var(--shadow-md)}.tier-row{gap:14px;margin-bottom:10px}.tier-badge,.tier-row{display:flex;align-items:center}.tier-badge{width:36px;height:36px;border-radius:10px;justify-content:center;font-weight:900;color:#fff;flex-shrink:0;font-size:1rem;box-shadow:0 4px 12px -4px rgba(0,0,0,.5)}.tier-S{background:linear-gradient(135deg,#e74c3c,#c0392b)}.tier-A{background:linear-gradient(135deg,#e67e22,#d35400)}.tier-B{background:linear-gradient(135deg,#f1c40f,#d4ac0d);color:#222}.card-img{width:100%;height:150px;object-fit:cover;border-radius:10px;margin-bottom:14px;background:var(--bg-elev);border:1px solid var(--border)}.video-card{display:flex;flex-direction:column}.video-card .card-img{height:160px}.video-card .v-meta{font-size:.78rem;color:var(--text-dim);margin-top:4px;display:flex;align-items:center;gap:6px}.video-thumb{position:relative;display:block;overflow:hidden;border-radius:10px}.video-thumb .card-img{margin-bottom:0}.video-thumb .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:54px;height:54px;border-radius:50%;background:rgba(0,0,0,.55);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.25);transition:background .2s ease,transform .2s ease,box-shadow .2s ease}.video-thumb .play-btn:after{content:"";display:block;width:0;height:0;border-left:17px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent;margin-left:4px}.video-thumb:hover .play-btn{background:var(--accent);box-shadow:0 0 24px var(--accent-glow);transform:translate(-50%,-50%) scale(1.08)}.page-head{padding:52px 0 8px;position:relative}.page-head h1{font-size:clamp(1.9rem,4vw,2.4rem);font-weight:900;letter-spacing:-.025em}.page-head .desc{color:var(--text-dim);margin-top:10px;max-width:680px;font-size:1.02rem}.page-head:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 35%,transparent),transparent 65%)}.faq-block{margin-top:24px}.faq-block h2{font-size:1.4rem;font-weight:800;margin-bottom:14px}.faq-item{margin:10px 0;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-card);overflow:hidden;transition:border-color .15s ease}.faq-item:hover{border-color:var(--border-soft)}.faq-item summary{cursor:pointer;font-weight:700;color:var(--text);padding:14px 18px;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:1.3rem;font-weight:500;color:var(--accent-2);transition:transform .2s ease;flex-shrink:0}.faq-item[open] summary:after{transform:rotate(45deg)}.faq-item[open] summary{background:var(--bg-hover)}.faq-item .faq-a{padding:0 18px 16px;color:var(--text-dim);font-size:.94rem}.footer{position:relative;border-top:1px solid var(--border);padding:44px 0;margin-top:48px;color:var(--text-dim);font-size:.88rem;background:color-mix(in srgb,var(--bg-elev) 55%,transparent)}.footer:before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent-glow),transparent);opacity:.6}.footer .container{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;align-items:flex-start}.footer a{color:var(--text-dim)}.footer a:hover{color:var(--accent-2)}.footer strong{color:var(--text);font-weight:800}.footer p{margin-top:6px}@media (max-width:640px){.hero{padding:60px 0 52px}.hero h1{font-size:clamp(2rem,9vw,2.6rem)}.nav-inner{gap:8px 12px;padding:10px 16px;flex-wrap:nowrap}.nav-logo{font-size:.98rem;white-space:nowrap}.nav-links{order:3;width:100%;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:4px;padding-bottom:2px}.nav-links::-webkit-scrollbar{display:none}.nav-links a{padding:6px 10px;font-size:.84rem;white-space:nowrap;flex-shrink:0}.lang-switch{margin-left:auto;padding:3px 8px;flex-shrink:0}.stats{gap:8px}.stats .stat{flex:1 1 auto;min-width:108px}.stat b{font-size:1rem}.codes .code-item,.prose table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}.card p,.code-item code,.prose code,.prose p{overflow-wrap:anywhere;word-break:break-word}}