*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:#F5F6F8;color:#1C2130;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
:root{
  --navy:#1a1a2e;--blue:#2E7DDA;--blue-h:#1D67C1;
  --green:#0F7B55;--green-l:#E3F5EF;
  --amber:#A05A00;--amber-l:#FEF4E3;
  --red:#C0392B;--red-l:#FDECEA;
  --bg:#F5F6F8;--white:#fff;
  --border:#DDE1E9;--border-s:#EAEDF2;
  --text:#1C2130;--text-2:#5A6478;--text-3:#8A94A6;
  --r-sm:6px;--r-md:8px;--r-lg:12px;
}
/* NAV */
.simple-nav{background:var(--navy);padding:0 40px;height:60px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:200}
.nav-logo{color:#fff;font-weight:700;font-size:17px;display:flex;align-items:center;gap:10px}
.nav-logo-mark{width:32px;height:32px;border-radius:6px;background:rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center}
.nav-logo span{color:#7BAED6}
.nav-right{display:flex;align-items:center;gap:20px}
.nav-right a{color:rgba(255,255,255,.75);font-size:14px}
.nav-right a:hover{color:#fff}
.nav-cta{background:#2E7DDA;color:#fff!important;padding:7px 18px;border-radius:6px;font-weight:600;font-size:14px}
.nav-cta:hover{background:#1D67C1!important}
@media(max-width:700px){.simple-nav{padding:0 16px}.nav-right a:not(.nav-cta){display:none}}
/* HERO */
.article-hero{background:var(--white);border-bottom:1px solid var(--border-s);padding:48px 0 40px}
.article-container{max-width:780px;margin:0 auto;padding:0 24px}
.breadcrumb{font-size:13px;color:var(--text-3);margin-bottom:18px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--blue)}
.article-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:14px}
.article-hero h1{font-size:clamp(24px,3.5vw,36px);font-weight:700;line-height:1.25;color:var(--text);letter-spacing:-.02em;margin-bottom:16px}
.article-meta{display:flex;gap:16px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
/* BODY */
.article-body{max-width:780px;margin:0 auto;padding:40px 24px 60px}
.article-body h2{font-size:22px;font-weight:700;color:var(--navy);margin:40px 0 16px}
.article-body h3{font-size:17px;font-weight:700;color:var(--text);margin:28px 0 10px}
.article-body p{font-size:15px;color:var(--text-2);line-height:1.75;margin-bottom:14px}
.article-body a{color:var(--blue);text-decoration:underline}
.article-body a:hover{color:var(--blue-h)}
/* COMPARE TABLE */
.compare-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.compare-table th{background:var(--navy);color:#fff;padding:12px 16px;text-align:left;font-weight:600;font-size:13px}
.compare-table td{padding:11px 16px;border-bottom:1px solid var(--border-s);color:var(--text-2)}
.compare-table tr:last-child td{border-bottom:none}
.compare-table tr:nth-child(even) td{background:var(--bg)}
.compare-table .best{color:var(--green);font-weight:600}
/* INFO BOX */
.info-box{background:#EDF3FB;border:1.5px solid #C3D6F0;border-radius:8px;padding:14px 18px;margin:20px 0;font-size:14px;color:var(--navy);line-height:1.6}
.warn-box{background:var(--amber-l);border:1.5px solid #F6C87A;border-radius:8px;padding:14px 18px;margin:20px 0;font-size:14px;color:var(--amber);line-height:1.6}
.ok-box{background:var(--green-l);border:1.5px solid #6FCF97;border-radius:8px;padding:14px 18px;margin:20px 0;font-size:14px;color:var(--green);line-height:1.6}
.key-block{background:var(--white);border-left:4px solid var(--blue);border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;font-size:15px;color:var(--text);line-height:1.7}
/* STEPS */
.steps-list{list-style:none;padding:0;margin:20px 0;display:flex;flex-direction:column;gap:12px}
.steps-list li{display:flex;gap:16px;align-items:flex-start;background:var(--white);border:1px solid var(--border-s);border-radius:10px;padding:16px 20px}
.step-num{width:32px;height:32px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.step-body{flex:1}
.step-title{font-weight:600;font-size:14px;color:var(--text);margin-bottom:4px}
.step-desc{font-size:13px;color:var(--text-2);line-height:1.6}
/* CTA */
.cta-block{background:var(--navy);border-radius:12px;padding:36px 40px;text-align:center;margin:48px 0}
.cta-block h3{color:#fff;font-size:20px;margin-bottom:10px}
.cta-block p{color:rgba(255,255,255,.7);margin-bottom:24px;font-size:15px}
.cta-btn{display:inline-block;background:var(--blue);color:#fff;padding:13px 32px;border-radius:8px;font-weight:600;font-size:16px;text-decoration:none}
.cta-btn:hover{background:var(--blue-h);text-decoration:none}
/* FAQ */
.faq{margin:48px 0}
.faq h2{font-size:22px;font-weight:700;color:var(--navy);margin-bottom:24px}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:8px;margin-bottom:10px;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:flex-start;gap:12px;padding:18px 22px;font-size:15px;font-weight:600;color:var(--text);text-align:left;background:none;border:none;cursor:pointer;font-family:inherit;transition:background .15s}
.faq-q:hover{background:var(--bg)}
.faq-icon{width:24px;height:24px;border-radius:50%;background:#EDF3FB;color:var(--navy);font-size:15px;font-weight:700;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-ans{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-ans-inner{padding:0 22px 18px;font-size:14px;color:var(--text-2);line-height:1.7}
/* LAYOUT */
.read-progress{position:fixed;top:0;left:0;height:3px;background:var(--blue);z-index:999;width:0;transition:width .1s}
.page-wrap{max-width:1200px;margin:0 auto;padding:0 24px 80px}
.blog-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.blog-main{min-width:0}
.blog-sidebar{position:sticky;top:84px}
@media(max-width:900px){.blog-layout{grid-template-columns:1fr}.blog-sidebar{position:static}}
/* Sidebar */
.bsb-card{background:var(--white);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}
.bsb-toc h3,.bsb-cta h3{font-size:14px;font-weight:700;color:var(--navy);margin-bottom:12px}
.bsb-toc-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}
.bsb-toc-list li a{font-size:13px;color:var(--text-2);text-decoration:none;padding:4px 8px;border-radius:5px;display:block;transition:all .15s}
.bsb-toc-list li a:hover{background:var(--bg);color:var(--navy)}
.bsb-cta-icon{font-size:28px;margin-bottom:8px}
.bsb-cta p{font-size:13px;color:var(--text-2);line-height:1.5;margin-bottom:12px}
.bsb-cta-price{font-size:20px;font-weight:700;color:var(--navy);margin-bottom:4px}
.bsb-cta-time{font-size:12px;color:var(--text-3);margin-bottom:16px}
.bsb-cta-btn{display:block;background:var(--blue);color:#fff;padding:11px 20px;border-radius:8px;text-align:center;font-weight:600;font-size:14px;text-decoration:none}
.bsb-cta-btn:hover{background:var(--blue-h);text-decoration:none}