:root{--bg:#060b10;--surface:#0d141e;--card:#121b27;--border:rgba(148,175,205,0.08);--border-hover:rgba(26,188,156,0.35);--primary:#1abc9c;--primary-glow:rgba(26,188,156,0.25);--primary-soft:rgba(26,188,156,0.10);--text:#e8edf2;--text-muted:#8a9aae;--text-dim:#5c6e82;--radius:16px;--radius-sm:10px;--shadow:0 4px 24px rgba(0,0,0,0.35);--shadow-lg:0 12px 40px rgba(0,0,0,0.45)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;margin:0;line-height:1.65;font-size:15.5px;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none;transition:all .2s ease}a:hover{color:#2dd4b6}
.app-header{position:sticky;top:0;z-index:100;display:flex;justify-content:space-between;align-items:center;padding:0 22px;height:54px;background:rgba(6,11,16,.75);backdrop-filter:blur(16px) saturate(1.2);-webkit-backdrop-filter:blur(16px) saturate(1.2);border-bottom:1px solid var(--border)}
.header-title{margin:0;font-size:15px;font-weight:700;color:var(--primary);letter-spacing:2.5px;text-transform:uppercase;display:flex;align-items:center;gap:8px}
.header-title i{font-size:14px;opacity:.9}
.header-nav{display:flex;gap:6px;align-items:center}
.header-nav a{color:var(--text-muted);font-size:12px;font-weight:500;letter-spacing:.8px;text-transform:uppercase;padding:6px 12px;border-radius:6px;transition:all .25s ease;position:relative}
.header-nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.header-nav a.active{color:var(--primary);background:var(--primary-soft)}
.header-nav a.active::after{content:'';position:absolute;bottom:-14px;left:50%;transform:translateX(-50%);width:14px;height:2px;background:var(--primary);border-radius:2px;box-shadow:0 0 8px var(--primary-glow)}
.hero-wrap{position:relative;overflow:hidden;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(26,188,156,.08) 0%,transparent 60%),linear-gradient(180deg,var(--surface) 0%,var(--bg) 100%);border-bottom:1px solid var(--border)}
.hero-inner{max-width:1100px;margin:0 auto;padding:60px 24px 50px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.hero-text h1{font-size:clamp(28px,4.5vw,44px);font-weight:800;line-height:1.15;margin:0 0 14px;color:var(--text);letter-spacing:-.5px}
.hero-text h1 span{color:var(--primary)}
.hero-text>p{font-size:17px;color:var(--text-muted);margin:0 0 24px;line-height:1.55;max-width:480px}
.rating-pill{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,rgba(26,188,156,.12),rgba(26,188,156,.05));border:1px solid rgba(26,188,156,.2);border-radius:50px;padding:6px 16px;font-size:13px;font-weight:500;color:var(--primary);margin-bottom:20px}
.rating-pill .stars{color:#f1c40f;letter-spacing:1px}
.hero-cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--primary),#16a085);color:#fff;padding:12px 26px;border-radius:50px;font-weight:600;font-size:14px;letter-spacing:.3px;border:none;cursor:pointer;box-shadow:0 4px 20px rgba(26,188,156,.35),0 0 40px rgba(26,188,156,.1);transition:all .3s ease}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(26,188,156,.45),0 0 60px rgba(26,188,156,.15);text-decoration:none;color:#fff}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--text-muted);padding:12px 22px;border-radius:50px;font-weight:500;font-size:14px;border:1px solid var(--border);cursor:pointer;transition:all .3s ease}
.btn-ghost:hover{border-color:var(--border-hover);color:var(--text);background:rgba(255,255,255,.03);text-decoration:none}
.hero-img-wrap{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--border);background:var(--card)}
.hero-img-wrap::before{content:'';position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:linear-gradient(135deg,rgba(26,188,156,.3),transparent 50%,rgba(26,188,156,.1));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.hero-img-wrap img{display:block;width:100%;height:auto;opacity:.95}
.hero-badge{position:absolute;bottom:14px;left:14px;background:rgba(6,11,16,.85);backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 14px;font-size:12px;font-weight:500;color:var(--text-muted);display:flex;align-items:center;gap:6px}
.hero-badge i{color:var(--primary);font-size:11px}
.container{max-width:860px;margin:0 auto;padding:40px 22px 70px}
.breadcrumbs{font-size:11px;font-weight:500;color:var(--text-dim);margin-bottom:28px;text-transform:uppercase;letter-spacing:1px;display:flex;gap:8px;align-items:center}
.breadcrumbs a{color:var(--text-dim)}.breadcrumbs a:hover{color:var(--primary)}.breadcrumbs i{font-size:9px;color:var(--text-dim)}
h2{font-size:26px;font-weight:700;margin-top:44px;margin-bottom:14px;color:var(--text);letter-spacing:-.3px;position:relative;padding-bottom:10px}
h2::after{content:'';position:absolute;bottom:0;left:0;width:40px;height:3px;background:linear-gradient(90deg,var(--primary),transparent);border-radius:3px}
h3{font-size:20px;font-weight:600;margin-top:32px;margin-bottom:10px;color:#a8d5c8}
h4{font-size:16px;font-weight:600;margin-top:20px;margin-bottom:8px;color:#b8c9d8}
p{margin:0 0 14px;color:#b0c1d4}
.lead{font-size:17.5px;line-height:1.6;color:#a8b9cc;margin-bottom:28px;font-weight:400}
.lead strong{color:var(--text);font-weight:600}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:22px;margin:18px 0;transition:all .3s ease}
.card:hover{border-color:var(--border-hover);transform:translateY(-1px)}
.card-accent{background:linear-gradient(135deg,rgba(26,188,156,.06),rgba(26,188,156,.02));border:1px solid rgba(26,188,156,.15)}
.key-takeaway{display:flex;gap:16px;align-items:flex-start;background:linear-gradient(135deg,rgba(26,188,156,.07),rgba(26,188,156,.02));border:1px solid rgba(26,188,156,.18);border-radius:var(--radius-sm);padding:20px 22px;margin:24px 0}
.key-takeaway i{color:var(--primary);font-size:18px;margin-top:2px;flex-shrink:0}
.key-takeaway div{flex:1}
.key-takeaway strong{color:var(--primary);font-weight:600;display:block;margin-bottom:4px;font-size:14px}
.key-takeaway p{margin:0;color:#a0b3c8;font-size:14.5px;line-height:1.55}
.step-list{counter-reset:step;list-style:none;padding:0;margin:20px 0}
.step-list li{position:relative;padding-left:58px;margin-bottom:22px;min-height:38px}
.step-list li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:36px;height:36px;background:linear-gradient(135deg,var(--primary),#0e8c6e);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;box-shadow:0 4px 12px rgba(26,188,156,.25)}
table{width:100%;border-collapse:separate;border-spacing:0;margin:18px 0;background:var(--card);border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border)}
th,td{padding:12px 16px;text-align:left;font-size:14px}
th{background:linear-gradient(180deg,rgba(26,188,156,.08),rgba(26,188,156,.03));color:var(--primary);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.8px}
tr:not(:last-child) td{border-bottom:1px solid var(--border)}
td{color:#a8b9cc}tr:hover td{background:rgba(255,255,255,.02)}
code{background:rgba(26,188,156,.08);color:var(--primary);padding:3px 8px;border-radius:5px;font-family:'SF Mono',Consolas,monospace;font-size:13px;border:1px solid rgba(26,188,156,.12)}
kbd{background:var(--bg);border:1px solid var(--border);border-radius:5px;padding:3px 8px;font-family:'SF Mono',Consolas,monospace;font-size:12px;color:var(--text-muted);box-shadow:0 2px 0 rgba(0,0,0,.2)}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px 22px;margin-bottom:12px;transition:all .25s ease}
.faq-item:hover{border-color:rgba(148,175,205,.15)}
.faq-item h4{margin:0 0 8px;color:var(--primary);font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px}
.faq-item h4 i{font-size:12px;opacity:.7}
.faq-item p{margin:0;color:#9aacbf;font-size:14.5px;line-height:1.6}
.rating-widget{background:linear-gradient(135deg,var(--card),rgba(26,188,156,.03));border:1px solid var(--border);border-radius:var(--radius);padding:28px;text-align:center;margin:36px 0;position:relative;overflow:hidden}
.rating-widget::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 50% 50%,rgba(26,188,156,.06),transparent 60%);pointer-events:none}
.rating-widget .stars-big{font-size:22px;color:#f1c40f;letter-spacing:3px;margin-bottom:8px;position:relative}
.rating-widget .score{font-size:28px;font-weight:800;color:var(--text);margin-bottom:4px;position:relative}
.rating-widget .reviews{font-size:13px;color:var(--text-muted);margin-bottom:16px;position:relative}
.rating-widget .quote{font-style:italic;color:#9aacbf;font-size:15px;max-width:500px;margin:0 auto 18px;line-height:1.55;position:relative}
.rating-widget .quote::before{content:'"';color:var(--primary);font-size:24px;font-weight:700;margin-right:4px}
.cta-box{background:linear-gradient(135deg,rgba(26,188,156,.08),rgba(26,188,156,.02));border:1px solid rgba(26,188,156,.18);border-radius:var(--radius);padding:32px;text-align:center;margin:40px 0;position:relative;overflow:hidden}
.cta-box::after{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--primary),transparent);opacity:.4}
.cta-box h3{margin-top:0;color:var(--text);font-size:22px;font-weight:700}
.cta-box p{color:var(--text-muted);margin-bottom:20px}
.related-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin-top:28px}
.related-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;transition:all .3s ease;display:flex;flex-direction:column;gap:8px}
.related-card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.3)}
.related-card .rc-icon{width:36px;height:36px;background:linear-gradient(135deg,rgba(26,188,156,.12),rgba(26,188,156,.05));border:1px solid rgba(26,188,156,.15);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:14px;margin-bottom:4px}
.related-card h4{margin:0;font-size:15px;color:var(--text);font-weight:600}
.related-card p{margin:0;font-size:13px;color:var(--text-muted);line-height:1.5}
.author-box{display:flex;gap:14px;align-items:center;background:var(--card);border-radius:var(--radius-sm);padding:18px 22px;margin-top:44px;border:1px solid var(--border)}
.author-box img{width:48px;height:48px;border-radius:50%;background:var(--bg);border:2px solid var(--border)}
.author-box div{flex:1}
.author-box strong{color:var(--text);font-weight:600;font-size:14px}
.author-box span{font-size:13px;color:var(--text-muted);line-height:1.5}
.site-footer{text-align:center;padding:36px 22px;color:var(--text-dim);font-size:12.5px;border-top:1px solid var(--border);background:var(--surface)}
.site-footer a{color:var(--text-muted)}.site-footer a:hover{color:var(--primary)}
@media(max-width:800px){.hero-inner{grid-template-columns:1fr;padding:40px 22px 36px}.hero-img-wrap{order:-1;max-width:420px;margin:0 auto}.hero-text{text-align:center}.hero-text>p{margin-left:auto;margin-right:auto}.hero-cta-row{justify-content:center}}
@media(max-width:520px){.app-header{padding:0 14px}.header-nav a{font-size:11px;padding:5px 8px}.header-title{font-size:13px;letter-spacing:1.5px}.hero-text h1{font-size:26px}.container{padding:28px 16px 50px}.step-list li{padding-left:48px}.step-list li::before{width:32px;height:32px;font-size:13px}.rating-widget{padding:22px 18px}.cta-box{padding:24px 18px}}
.guide-sidebar{position:sticky;top:70px;width:220px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;margin-bottom:24px}.sidebar-header{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.8px;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--border)}.sidebar-nav{display:flex;flex-direction:column;gap:2px}.sidebar-link{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:6px;color:var(--text-muted);font-size:13px;transition:all .2s}.sidebar-link:hover{background:rgba(255,255,255,.03);color:var(--text);text-decoration:none}.sidebar-link.active{background:var(--primary-soft);color:var(--primary);font-weight:500}.sl-num{width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:var(--bg);border-radius:4px;font-size:11px;font-weight:700;color:var(--text-dim)}.sidebar-link.active .sl-num{background:var(--primary);color:#fff}.sidebar-cta{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:12px;padding:10px;background:linear-gradient(135deg,var(--primary),#16a085);color:#fff;border-radius:8px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.sidebar-cta:hover{opacity:.9;text-decoration:none;color:#fff}.guide-layout{display:grid;grid-template-columns:220px 1fr;gap:32px;max-width:1100px;margin:0 auto;padding:40px 22px 70px}@media(max-width:900px){.guide-layout{grid-template-columns:1fr}.guide-sidebar{position:relative;top:0;width:100%}}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:860px;margin:0 auto;padding:36px 22px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:24px}.footer-col h5{font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.8px;margin:0 0 12px}.footer-col a{display:block;color:var(--text-muted);font-size:13px;padding:5px 0;transition:color .2s}.footer-col a:hover{color:var(--text);text-decoration:none}@media(max-width:600px){.footer-links{grid-template-columns:1fr}}