:root{color-scheme:dark;--bg:#0B1020;--panel:#111827;--panel2:#0f172a;--line:#1f2937;--text:#e5e7eb;--muted:#9ca3af;--soft:#cbd5e1;--brand:#2563eb;--brand2:#38bdf8;--green:#10b981;--orange:#f97316;--gold:#fbbf24;--danger:#ef4444;--shadow:0 18px 60px rgba(0,0,0,.35)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% 0,rgba(37,99,235,.22),transparent 32%),radial-gradient(circle at 80% 8%,rgba(56,189,248,.14),transparent 28%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.72}a{color:#93c5fd;text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1160px,92vw);margin:0 auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(11,16,32,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(148,163,184,.16)}.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:white;font-size:1.05rem}.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 10px 30px rgba(37,99,235,.35)}.navlinks{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.navlinks a{color:var(--soft);font-size:.94rem}.nav-cta{padding:9px 14px;border:1px solid rgba(59,130,246,.55);border-radius:999px;background:rgba(37,99,235,.14);color:white!important}.hero{padding:74px 0 42px}.eyebrow{display:inline-flex;gap:8px;align-items:center;border:1px solid rgba(56,189,248,.3);background:rgba(56,189,248,.08);padding:6px 11px;border-radius:999px;color:#bae6fd;font-size:.86rem}.hero h1{font-size:clamp(2.2rem,5vw,4.9rem);line-height:1.04;margin:18px 0 18px;letter-spacing:-.06em;max-width:1040px}.lead{font-size:clamp(1.05rem,1.8vw,1.32rem);color:#cbd5e1;max-width:900px;margin:0 0 26px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;border:1px solid transparent;padding:12px 17px;font-weight:750;min-height:44px;cursor:pointer}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,var(--brand),#1d4ed8);color:white;box-shadow:0 12px 32px rgba(37,99,235,.3)}.btn-secondary{background:rgba(148,163,184,.1);border-color:rgba(148,163,184,.24);color:white}.btn-green{background:rgba(16,185,129,.14);border-color:rgba(16,185,129,.35);color:#d1fae5}.btn-orange{background:rgba(249,115,22,.13);border-color:rgba(249,115,22,.35);color:#fed7aa}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:linear-gradient(180deg,rgba(17,24,39,.94),rgba(15,23,42,.92));border:1px solid rgba(148,163,184,.16);border-radius:22px;padding:22px;box-shadow:var(--shadow)}.card.soft{box-shadow:none;background:rgba(15,23,42,.6)}.card h3{margin:0 0 10px;font-size:1.1rem}.card p{margin:0;color:var(--muted)}.section{padding:42px 0}.section h2{font-size:clamp(1.7rem,3vw,2.45rem);line-height:1.13;margin:0 0 10px;letter-spacing:-.04em}.section .sub{color:var(--muted);font-size:1.05rem;max-width:860px;margin:0 0 24px}.badge{display:inline-block;border-radius:999px;padding:3px 9px;font-size:.76rem;background:rgba(37,99,235,.16);color:#bfdbfe;border:1px solid rgba(37,99,235,.28)}.badge.green{background:rgba(16,185,129,.14);color:#bbf7d0;border-color:rgba(16,185,129,.32)}.badge.orange{background:rgba(249,115,22,.14);color:#fed7aa;border-color:rgba(249,115,22,.32)}.badge.gold{background:rgba(251,191,36,.13);color:#fde68a;border-color:rgba(251,191,36,.32)}.table-wrap{overflow-x:auto;border:1px solid rgba(148,163,184,.16);border-radius:18px;background:rgba(15,23,42,.62)}table{width:100%;border-collapse:collapse;min-width:760px}th,td{padding:14px 15px;border-bottom:1px solid rgba(148,163,184,.13);text-align:left;vertical-align:top}th{color:#dbeafe;background:rgba(37,99,235,.12);font-size:.92rem}td{color:#d1d5db}tr:last-child td{border-bottom:0}.price{font-size:1.45rem;font-weight:850;color:white}.muted{color:var(--muted)}.kpi{display:flex;gap:12px;flex-wrap:wrap}.kpi span{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:999px;background:rgba(148,163,184,.08);border:1px solid rgba(148,163,184,.15);color:#cbd5e1;font-size:.9rem}.note{border-left:4px solid var(--brand2);background:rgba(56,189,248,.08);padding:16px 18px;border-radius:14px;color:#dbeafe}.warning{border-left-color:var(--orange);background:rgba(249,115,22,.08);color:#ffedd5}.tools{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0}.input,select{width:100%;border:1px solid rgba(148,163,184,.22);background:rgba(2,6,23,.5);border-radius:12px;color:white;padding:12px 12px;font:inherit}label{display:block;color:#cbd5e1;font-size:.92rem;margin-bottom:6px}.result{background:rgba(37,99,235,.1);border:1px solid rgba(59,130,246,.25);border-radius:18px;padding:18px}.result h3{margin-top:0}.footer{margin-top:56px;border-top:1px solid rgba(148,163,184,.14);padding:30px 0;color:#94a3b8;font-size:.93rem}.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:22px}.breadcrumbs{padding:18px 0 0;color:#94a3b8;font-size:.9rem}.toc{background:rgba(2,6,23,.35);border:1px solid rgba(148,163,184,.14);border-radius:18px;padding:18px}.toc a{display:block;margin:6px 0;color:#cbd5e1}.article h2{margin-top:38px}.article h3{margin-top:26px}.article p,.article li{color:#cbd5e1}.article ul{padding-left:20px}.coupon-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:22px}.coupon{padding:14px;border:1px solid rgba(148,163,184,.15);border-radius:16px;background:rgba(15,23,42,.65)}.coupon b{display:block;color:white}.social-plan li{margin-bottom:8px}@media(max-width:860px){.grid-2,.grid-3,.grid-4,.tools,.footer .cols,.coupon-strip{grid-template-columns:1fr}.nav{align-items:flex-start}.navlinks{justify-content:flex-start}.hero{padding-top:44px}.form-row{grid-template-columns:1fr}table{min-width:700px}}


/* v3 conversion blocks */
.newsletter-card{border:1px solid rgba(96,165,250,.25);background:linear-gradient(135deg,rgba(37,99,235,.16),rgba(16,185,129,.08));border-radius:24px;padding:28px;box-shadow:0 20px 60px rgba(0,0,0,.22)}
.newsletter-card h2{margin:.5rem 0 0.75rem;font-size:clamp(1.4rem,2.5vw,2.1rem)}
.newsletter-form{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.newsletter-form input{flex:1;min-width:240px;border:1px solid rgba(148,163,184,.3);background:rgba(15,23,42,.85);color:#e5e7eb;border-radius:12px;padding:13px 14px;font-size:1rem}
.newsletter-form input::placeholder{color:#94a3b8}
@media (max-width: 720px){.newsletter-form{display:block}.newsletter-form input,.newsletter-form button{width:100%;margin-top:10px}}