:root{--bg:#ffffff;--bg-card:#ffffff;--bg-elevated:#f9fafb;--border:#e5e7eb;--primary:#00a86b;--primary-light:#10b981;--primary-dark:#047857;--text:#111111;--text-secondary:#6b7280;--text-tertiary:#9ca3af}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;background:#f9fafb;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit}nav{position:-webkit-sticky;position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:14px 24px}.nav-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo{gap:8px;font-size:20px;font-weight:800;color:var(--text);text-decoration:none}.logo,.logo-icon{display:inline-flex;align-items:center}.logo-icon{justify-content:center;width:28px;height:28px;border-radius:6px;background:linear-gradient(135deg,#1f2937,#000000);color:#fff;font-weight:900;font-size:13px;position:relative;flex-shrink:0}.logo-icon:after{content:"";position:absolute;top:3px;right:3px;width:4px;height:4px;border-radius:50%;background:#00a86b}.logo-text-pro{background:linear-gradient(135deg,#b8860b,#d4af37);-webkit-background-clip:text;background-clip:text;color:transparent}.nav-links{display:flex;gap:22px;align-items:center}.nav-links a{color:var(--text-secondary);text-decoration:none;font-size:14px}.nav-links a:hover{color:var(--primary)}.nav-cta{padding:8px 16px;background:var(--primary);color:#000!important;border-radius:999px;font-weight:800}.nav-cta:hover{background:var(--primary-light)}.hamburger{display:none;background:none;border:0;cursor:pointer;padding:6px}.hamburger span{display:block;width:22px;height:2px;background:var(--text);margin:4px 0;transition:.2s}@media (max-width:900px){.nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:#fff;padding:14px 24px;border-bottom:1px solid var(--border);gap:14px}.nav-links.open{display:flex}.hamburger{display:block}}.tut-header{padding:56px 24px 28px;text-align:center;background:linear-gradient(180deg,#f0fdf4,#f9fafb);border-bottom:1px solid var(--border)}.tut-header .badge{display:inline-block;padding:5px 12px;background:rgba(0,168,107,.1);color:var(--primary-dark);border:1px solid var(--primary);border-radius:999px;font-size:12px;font-weight:700;margin-bottom:14px}.tut-header h1{font-size:clamp(28px,4.5vw,40px);font-weight:800;margin-bottom:10px;letter-spacing:-.01em}.tut-header h1 .grad{background:linear-gradient(135deg,#00a86b,#047857);-webkit-background-clip:text;background-clip:text;color:transparent}.tut-header p{color:var(--text-secondary);font-size:16px;max-width:620px;margin:0 auto}.tut-tabs{max-width:1100px;margin:-8px auto 0;padding:0 24px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:12px;gap:12px;position:relative;z-index:1}.tut-tab{display:flex;align-items:center;gap:12px;padding:16px 18px;background:#fff;border:1px solid var(--border);border-radius:14px;cursor:pointer;font-family:inherit;text-align:left;box-shadow:0 8px 22px rgba(17,24,39,.06);transition:transform .18s,box-shadow .18s,border-color .18s}.tut-tab:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(17,24,39,.1);border-color:var(--primary)}.tut-tab.is-active{border-color:var(--primary);background:linear-gradient(135deg,#ecfdf5,#ffffff)}.tut-tab-num{display:inline-flex;width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#00a86b,#047857);color:#fff;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex-shrink:0}.tut-tab.is-active .tut-tab-num{box-shadow:0 4px 12px rgba(0,168,107,.35)}.tut-tab-title{font-size:15px;font-weight:700;color:var(--text);line-height:1.35}.tut-panels{max-width:1100px;margin:36px auto 60px;padding:0 24px}.tut-panel{display:none;animation:tut-fade .25s ease}.tut-panel.is-active{display:block}@keyframes tut-fade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.tut-panel-head{margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--border)}.tut-panel-head h2{font-size:26px;font-weight:800;margin-bottom:6px}.tut-panel-desc{color:var(--text-secondary);font-size:15px}.tut-video{margin:18px 0 28px;background:#000;border-radius:16px;overflow:hidden;aspect-ratio:16/9;box-shadow:0 12px 28px rgba(17,24,39,.12)}.tut-video iframe,.tut-video video{width:100%;height:100%;display:block;border:0;object-fit:contain}.tut-steps{list-style:none;counter-reset:step;display:grid;grid-gap:16px;gap:16px}.tut-step{background:#fff;border:1px solid var(--border);border-radius:16px;padding:22px;box-shadow:0 6px 18px rgba(17,24,39,.04)}.tut-step-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}.tut-step-num{display:inline-flex;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#00a86b,#047857);color:#fff;align-items:center;justify-content:center;font-weight:800;font-size:17px;flex-shrink:0;box-shadow:0 4px 10px rgba(0,168,107,.28)}.tut-step-title{font-size:18px;font-weight:800;color:var(--text);line-height:1.4}.tut-step-body{padding-left:50px}.tut-step-body p{color:#374151;font-size:15px;line-height:1.7;white-space:pre-wrap}.tut-step-action{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:11px 18px;border:1px solid #059669;border-radius:10px;background:linear-gradient(135deg,#00a86b,#059669);color:#fff;font-size:14px;font-weight:800;line-height:1.4;text-decoration:none;box-shadow:0 7px 18px rgba(0,168,107,.2);transition:transform .18s ease,box-shadow .18s ease,filter .18s ease}.tut-step-action:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(0,168,107,.27);filter:brightness(1.03)}.tut-step-action:focus-visible{outline:3px solid rgba(0,168,107,.28);outline-offset:3px}.tut-step-action span{font-size:16px;font-weight:600}.tut-step-img{margin-top:14px}.tut-step-img img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--border);display:block}.tut-empty{text-align:center;padding:60px 20px;color:var(--text-secondary)}.tut-cta{max-width:1100px;margin:0 auto 60px;padding:28px 24px;text-align:center;background:linear-gradient(135deg,#ecfdf5,#ffffff);border:1px solid var(--primary);border-radius:18px}.tut-cta h3{font-size:20px;font-weight:800;margin-bottom:8px}.tut-cta p{color:var(--text-secondary);margin-bottom:18px}.tut-cta-btns{display:inline-flex;gap:10px;flex-wrap:wrap;justify-content:center}.tut-cta-btn{display:inline-flex;align-items:center;gap:6px;padding:11px 22px;border-radius:12px;font-weight:800;text-decoration:none;transition:transform .18s,box-shadow .18s;font-size:14px}.tut-cta-btn.primary{background:var(--primary);color:#000;box-shadow:0 6px 18px rgba(0,168,107,.28)}.tut-cta-btn.primary:hover{transform:translateY(-1px)}.tut-cta-btn.ghost{background:#fff;color:var(--text);border:1px solid var(--border)}.tut-cta-btn.ghost:hover{border-color:var(--primary)}footer{background:#fff;border-top:1px solid var(--border);padding:36px 24px}.foot-inner{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;color:var(--text-tertiary);font-size:13px}.foot-inner a{color:var(--text-secondary);text-decoration:none;margin-right:14px}.foot-inner a:hover{color:var(--primary)}@media (max-width:640px){.tut-step{padding:18px}.tut-step-body{padding-left:0;margin-top:10px}.tut-step-head{margin-bottom:8px}.tut-step-action{width:100%;justify-content:center}}@media (prefers-reduced-motion:reduce){.tut-step-action{transition:none}}