:root{--blue:#1d4ed8;--blue-dark:#1e40af;--blue-deep:#172554;--blue-soft:#eff6ff;--ink:#0f172a;--ink-2:#334155;--ink-3:#64748b;--line:#e2e8f0;--bg:#ffffff;--bg-soft:#f8fafc;--green:#059669;--green-soft:#ecfdf5;--amber:#d97706;--amber-soft:#fffbeb;--red:#dc2626;--red-soft:#fef2f2;--radius:14px;--shadow:0 1px 2px rgba(15, 23, 42, .05), 0 10px 30px rgba(15, 23, 42, .08);--maxw:1080px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,segoe ui,pingfang sc,microsoft yahei,noto sans sc,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}img,svg{max-width:100%}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.skip-link{position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;padding:8px 16px;border-radius:0 0 8px 0;z-index:100}.skip-link:focus{left:0}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:10px;font-size:15px;font-weight:600;line-height:1.4;border:1.5px solid transparent;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease,transform .1s ease;text-decoration:none!important;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark)}.btn-outline{background:0 0;color:var(--blue);border-color:var(--blue)}.btn-outline:hover{background:var(--blue-soft)}.btn-outline-light{background:0 0;color:#fff;border-color:rgba(255,255,255,.5)}.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,8%)}.btn-lg{padding:13px 26px;font-size:16px;border-radius:12px}.btn-sm{padding:7px 14px;font-size:14px}.icon{width:1.1em;height:1.1em;flex-shrink:0}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none!important;color:var(--ink)}.brand-icon{width:34px;height:34px}.brand-text{font-weight:800;font-size:18px;letter-spacing:.2px;display:flex;align-items:baseline;gap:8px}.brand-text small{font-weight:500;font-size:12px;color:var(--ink-3);letter-spacing:2px}.site-nav{display:flex;align-items:center;gap:22px}.site-nav>a{color:var(--ink-2);font-size:15px;font-weight:500;text-decoration:none;padding:4px 0}.site-nav>a:hover,.site-nav>a.active{color:var(--blue)}.site-nav>a.active{box-shadow:inset 0 -2px 0 var(--blue)}.site-nav>a.btn{padding:7px 14px;font-size:14px;box-shadow:none;color:#fff;background:var(--blue)}.site-nav>a.btn:hover{color:#fff;background:var(--blue-dark)}.nav-cta{margin-left:6px}.nav-toggle,.nav-burger{display:none}@media(max-width:860px){.nav-burger{display:block;cursor:pointer;padding:10px;margin-right:-10px}.nav-burger span,.nav-burger span::before,.nav-burger span::after{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;content:"";transition:transform .2s ease,opacity .2s ease}.nav-burger span{position:relative}.nav-burger span::before{position:absolute;top:-7px;left:0}.nav-burger span::after{position:absolute;top:7px;left:0}.nav-toggle:checked+.nav-burger span{background:0 0}.nav-toggle:checked+.nav-burger span::before{transform:translateY(7px)rotate(45deg)}.nav-toggle:checked+.nav-burger span::after{transform:translateY(-7px)rotate(-45deg)}.site-nav{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px;box-shadow:var(--shadow)}.nav-toggle:checked~.site-nav{display:flex}.site-nav>a{padding:12px 4px;border-bottom:1px solid var(--line)}.site-nav>a.active{box-shadow:none}.nav-cta{margin:14px 0 0;justify-content:center}}.hero{background:radial-gradient(1000px 420px at 85% -10%,rgba(29,78,216,.14),transparent 60%),radial-gradient(700px 380px at 8% 0%,rgba(5,150,105,8%),transparent 55%),var(--bg);padding:72px 0 56px;text-align:center}.hero-kicker{display:inline-block;margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:1px;color:var(--blue);background:var(--blue-soft);padding:5px 14px;border-radius:999px}.hero h1{margin:0 0 18px;font-size:clamp(30px,5.4vw,46px);line-height:1.25;letter-spacing:-.5px}.hero-sub{max-width:640px;margin:0 auto 28px;color:var(--ink-2);font-size:clamp(15px,2vw,17px)}.hero-check{display:flex;gap:10px;max-width:560px;margin:0 auto 10px;padding:8px;background:#fff;border:1.5px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.hero-check input{flex:1;min-width:0;border:none;outline:none;font-size:16px;padding:8px 12px;background:0 0;color:var(--ink)}.hero-check input::placeholder{color:var(--ink-3)}.hero-check:focus-within{border-color:var(--blue)}.hero-note{color:var(--ink-3);font-size:13px;margin:8px 0 22px}.hero-points{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;list-style:none;margin:0;padding:0;color:var(--ink-2);font-size:14px;font-weight:500}.hero-points .icon{color:var(--green);margin-right:4px}.m-br{display:none}@media(max-width:560px){.m-br{display:block}.hero{padding:52px 0 44px}.hero-check{flex-direction:column}.hero-check .btn{justify-content:center}}.section{padding:64px 0}.section-soft{background:var(--bg-soft)}.section-title{text-align:center;margin:0 0 8px;font-size:clamp(24px,3.6vw,32px);letter-spacing:-.3px}.section-sub{text-align:center;color:var(--ink-3);margin:0 0 40px}.grid{display:grid;gap:22px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media(max-width:900px){.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.grid-4{grid-template-columns:1fr}.section{padding:48px 0}}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:0 1px 2px rgba(15,23,42,4%);display:flex;flex-direction:column;gap:8px;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;position:relative;color:inherit}a.card:hover,.price-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c7d5f5;text-decoration:none}.card h3{margin:2px 0 0;font-size:19px}.card p{margin:0;color:var(--ink-2);font-size:14.5px;flex:1}.card-icon{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:12px;background:var(--blue-soft);color:var(--blue);margin-bottom:8px}.card-icon .icon{width:24px;height:24px}.card-icon.warn{background:var(--amber-soft);color:var(--amber)}.card-price{font-weight:700;color:var(--blue);font-size:15px}.card-more{color:var(--blue);font-size:14px;font-weight:600;margin-top:10px}.point{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px}.point h3{margin:4px 0 6px;font-size:17px}.point p{margin:0;color:var(--ink-2);font-size:14.5px}.save-band{background:radial-gradient(800px 400px at 110% 110%,rgba(5,150,105,.12),transparent 55%),var(--blue-deep);color:#fff}.save-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}@media(max-width:900px){.save-grid{grid-template-columns:1fr;gap:32px}}.save-band h2{margin:0 0 12px;font-size:clamp(24px,3.6vw,32px)}.save-lead{color:#c7d7ff;margin:0 0 18px}.save-list{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:10px}.save-list .icon{color:#6ee7b7;margin-right:8px}.save-calc{background:rgba(255,255,255,7%);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:24px;text-align:center}.calc-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-radius:12px;background:rgba(255,255,255,6%)}.calc-row span{font-size:14px;color:#c7d7ff;text-align:left}.calc-row strong{font-size:22px;letter-spacing:-.5px}.calc-row small{font-size:13px;font-weight:500;color:#c7d7ff}.calc-row.old strong{color:#fca5a5;text-decoration:line-through}.calc-row.new{background:rgba(110,231,183,.12);border:1px solid rgba(110,231,183,.35)}.calc-row.new strong{color:#6ee7b7;font-size:26px}.calc-arrow{color:#93b4f7;font-size:13px;margin:10px 0;letter-spacing:2px}.calc-note{color:#8fa8d9;font-size:12.5px;margin:14px 0 0;text-align:left}.step{text-align:center;padding:0 10px}.step-num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;font-size:17px;margin-bottom:12px}.step h3{margin:0 0 6px;font-size:17px}.step p{margin:0;color:var(--ink-2);font-size:14px}.page-hero{background:var(--blue-deep);color:#fff;padding:56px 0 48px}.page-hero h1{margin:0 0 10px;font-size:clamp(26px,4.4vw,38px);line-height:1.3;letter-spacing:-.3px}.page-lead{color:#c7d7ff;margin:0;max-width:720px;font-size:16px}.price-grid{align-items:stretch}.price-card h3{margin:0;font-size:18px}.price-card .price strong{font-size:34px;letter-spacing:-1px;color:var(--ink)}.price-card .tagline{color:var(--ink-3);font-size:13.5px}.feature-list{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:9px}.feature-list li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--ink-2)}.feature-list .icon{color:var(--green);margin-top:5px;width:15px;height:15px}.price-card.highlighted{border:2px solid var(--blue);box-shadow:var(--shadow)}.badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--blue);color:#fff;font-size:12.5px;font-weight:600;padding:3px 14px;border-radius:999px;letter-spacing:2px}.price-grid{margin-top:16px}.price-note{text-align:center;color:var(--ink-3);font-size:13.5px;margin:26px 0 0}.faq-wrap{max-width:760px}.faq-wrap details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px}.faq-wrap summary{font-weight:600;cursor:pointer;font-size:15.5px}.faq-wrap details[open] summary{color:var(--blue);margin-bottom:6px}.faq-wrap details p{margin:6px 0 0;color:var(--ink-2);font-size:14.5px}.prose{max-width:760px;margin:0 auto;font-size:15.5px;color:var(--ink-2)}.prose h2{color:var(--ink);font-size:24px;margin:40px 0 12px}.prose h3{color:var(--ink);font-size:19px;margin:30px 0 10px}.prose p,.prose li{line-height:1.85}.prose a{text-decoration:underline}.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 2px rgba(15,23,42,5%)}.prose th,.prose td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.prose th{background:var(--blue-soft);color:var(--ink);font-size:13.5px}.prose tr:last-child td{border-bottom:none}.prose code{background:#eef2ff;color:var(--blue-dark);padding:2px 7px;border-radius:6px;font-size:.88em;font-family:cascadia code,Consolas,courier new,monospace}.prose pre{background:var(--blue-deep);color:#dbeafe;padding:18px 20px;border-radius:12px;overflow-x:auto;line-height:1.6}.prose pre code{background:0 0;color:inherit;padding:0}.prose blockquote{margin:18px 0;padding:12px 18px;border-left:4px solid var(--blue);background:var(--blue-soft);border-radius:0 10px 10px 0;color:var(--ink-2)}.prose img{border-radius:12px}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin:20px 0}@media(max-width:700px){.contact-grid{grid-template-columns:1fr}}.contact-grid p{margin:0 0 10px}.contact-grid img{margin-top:8px;border:1px solid var(--line);border-radius:12px;background:#fff}.blog-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}@media(max-width:800px){.blog-grid{grid-template-columns:1fr}}.blog-card h2{margin:2px 0 0;font-size:18px;line-height:1.5}.blog-date{color:var(--ink-3);font-size:13px}.article-wrap{max-width:780px}.article-header{margin-bottom:26px}.article-header h1{font-size:clamp(24px,4vw,34px);line-height:1.35;margin:0 0 10px;letter-spacing:-.3px}.article-meta{color:var(--ink-3);font-size:14px;display:flex;gap:8px;margin:0}.article-nav{margin-top:36px;padding-top:18px;border-top:1px solid var(--line)}.cta-box{margin:0 auto;max-width:820px;background:linear-gradient(135deg,var(--blue-dark),var(--blue));color:#fff;border-radius:20px;text-align:center;padding:44px 32px}.cta-box h2{margin:0 0 8px;font-size:clamp(20px,3vw,26px)}.cta-box p{color:#dbe7ff;margin:0 auto 22px;max-width:520px}.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.tool-wrap{max-width:820px}.tool-widget{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:26px 24px}.tool-widget form{display:flex;gap:10px}.tool-widget input{flex:1;min-width:0;border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;font-size:16px;outline:none}.tool-widget input:focus{border-color:var(--blue)}.tool-hint{color:var(--ink-3);font-size:13px;margin:12px 0 0}@media(max-width:560px){.tool-widget form{flex-direction:column}.tool-widget .btn{justify-content:center}}.check-result{margin-top:20px}.result-panel{border-radius:12px;padding:16px 18px}.result-panel.ok{background:var(--green-soft);border:1px solid #a7f3d0}.result-panel.bad{background:var(--red-soft);border:1px solid #fecaca}.result-panel.warn{background:var(--amber-soft);border:1px solid #fde68a}.result-panel .result-title{font-weight:700;font-size:16px;margin:0 0 8px;display:flex;align-items:center;gap:8px}.result-panel.ok .result-title{color:var(--green)}.result-panel.bad .result-title{color:var(--red)}.result-panel.warn .result-title{color:var(--amber)}.result-rows{display:grid;gap:6px;margin:10px 0 0;padding:0;list-style:none}.result-rows li{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:14.5px;color:var(--ink-2);border-bottom:1px dashed var(--line);padding:6px 0}.result-rows li:last-child{border-bottom:none}.result-rows .k{color:var(--ink-3)}.result-rows .v{font-weight:600;color:var(--ink)}.result-rows .v.good{color:var(--green)}.result-rows .v.bad{color:var(--red)}.result-rows .v.warn{color:var(--amber)}.result-advice{margin:12px 0 0;font-size:14.5px;color:var(--ink-2)}.result-cta{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}.result-error{color:var(--red);font-size:14.5px;margin:8px 0 0}.spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--line);border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-3px;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}.site-footer{background:var(--blue-deep);color:#c7d7ff;margin-top:72px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding:52px 20px 36px}@media(max-width:800px){.footer-grid{grid-template-columns:1fr;gap:28px}}.footer-brand p{font-size:14px;margin:14px 0 0;max-width:320px}.brand-light .brand-text{color:#fff}.brand-light .brand-text small{color:#93b4f7}.footer-col h3{color:#fff;font-size:15px;margin:0 0 14px;letter-spacing:1px}.footer-col a,.footer-col p{display:block;color:#c7d7ff;font-size:14px;margin:0 0 10px;text-decoration:none}.footer-col a:hover{color:#fff;text-decoration:underline}.footer-col .btn{display:inline-flex;margin-top:4px}.copyright{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:18px;padding-bottom:26px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8fa8d9}.copyright a{color:#8fa8d9;text-decoration:none}.copyright a:hover{color:#fff}.notfound{text-align:center}.notfound h1{font-size:88px;margin:0;color:var(--blue);letter-spacing:-3px}.notfound p{color:var(--ink-3);margin:6px 0 26px}img.phone-img,.contact-grid img.phone-img{display:inline-block;vertical-align:middle;margin:0;border:0;border-radius:0;background:0 0;height:auto}.footer-col img.phone-img{width:125px}