@font-face{font-family:"Manrope";src:url("/fonts/manrope-var.woff2") format("woff2");font-weight:400 800;font-style:normal;font-display:swap}
:root{
  --bg:#f4f7fc;--card:#ffffff;--ink:#13233d;--muted:#5b6b84;--line:#dde6f2;
  --accent:#0f73c7;--accent-deep:#0b5699;--accent-soft:#e8f2fc;
  --ok:#1f9d66;--warn:#b7791f;--radius:14px;--maxw:1100px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Manrope",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.head .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{font-weight:800;letter-spacing:.2px;color:var(--ink);font-size:17px;white-space:nowrap}
.brand span{color:var(--accent)}
.nav{display:flex;gap:16px;margin-left:auto;font-size:14.5px;font-weight:600}
.nav a{color:var(--muted)}
.nav a:hover{color:var(--accent);text-decoration:none}
.btn{display:inline-block;border:0;border-radius:10px;padding:13px 22px;font-weight:800;font-size:16px;cursor:pointer;text-align:center}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-deep);text-decoration:none}
.btn-ghost{background:#fff;color:var(--accent);border:2px solid var(--accent)}
.btn-ghost:hover{background:var(--accent-soft);text-decoration:none}
.hero{padding:56px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:36px;align-items:start}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.chip{background:var(--accent-soft);color:var(--accent-deep);border-radius:999px;padding:5px 12px;font-size:13px;font-weight:700}
.chip.ok{background:#e6f6ee;color:#147a4f}
h1{font-size:clamp(28px,4vw,42px);line-height:1.18;margin:0 0 16px;font-weight:800;letter-spacing:-.4px}
.lede{font-size:18.5px;color:var(--muted);margin:0 0 22px;max-width:56ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.small{font-size:13.5px;color:var(--muted)}
.ticket{background:linear-gradient(160deg,#0f2038,#123055 55%,#0f73c7 160%);color:#fff;border-radius:18px;padding:26px 24px;box-shadow:0 18px 40px rgba(15,45,90,.25)}
.ticket .label{font-size:13px;text-transform:uppercase;letter-spacing:1.4px;color:#9fc4e8;font-weight:700}
.code-row{display:flex;gap:10px;align-items:stretch;margin:12px 0 14px}
.code{flex:1;background:rgba(255,255,255,.08);border:2px dashed rgba(255,255,255,.5);border-radius:12px;padding:14px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:26px;font-weight:800;letter-spacing:1px;text-align:center;color:#fff}
.copy{border:0;border-radius:12px;background:#ffd60a;color:#13233d;font-weight:800;padding:0 18px;font-size:15px;cursor:pointer;white-space:nowrap}
.copy:active{transform:translateY(1px)}
.ticket ul{margin:14px 0 0;padding-left:18px;font-size:14.5px;color:#d7e7f8}
.ticket ul li{margin:5px 0}
.ticket .fine{font-size:12.5px;color:#9fc4e8;margin-top:14px}
section{padding:34px 0}
h2{font-size:clamp(22px,2.6vw,29px);font-weight:800;letter-spacing:-.3px;margin:0 0 8px}
.h2sub{color:var(--muted);margin:0 0 22px;max-width:70ch}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step .num{width:38px;height:38px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.step h3{margin:0 0 6px;font-size:18px}
.step p{margin:0;color:var(--muted);font-size:15.5px}
table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:15.5px;vertical-align:top}
th{background:#eef4fb;font-weight:800;font-size:14px;letter-spacing:.2px}
tr:last-child td{border-bottom:0}
.tablewrap{overflow-x:auto;border-radius:var(--radius)}
figure{margin:22px 0 0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
figure svg{display:block;width:100%;height:auto}
figcaption{color:var(--muted);font-size:13.5px;margin-top:12px}
.callout{border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 12px 12px 0;padding:16px 18px;margin:18px 0;font-size:15.5px}
.callout.warn{border-color:var(--warn);background:#fdf6e8}
.app{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.spec{background:#f2f6fc;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px}
.spec b{display:block;font-size:12.5px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.6px}
.offers{display:flex;flex-wrap:wrap;gap:10px}
.offer{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:700;font-size:14.5px}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:0}
summary{cursor:pointer;padding:16px 18px;font-weight:700;font-size:16.5px;list-style:none;position:relative;padding-right:44px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;top:12px;font-size:24px;color:var(--accent);font-weight:800}
details[open] summary::after{content:"–"}
details .ans{padding:0 18px 18px;color:var(--muted);font-size:15.5px;margin:0}
details .ans p{margin:0 0 10px}
details .ans p:last-child{margin-bottom:0}
footer{background:#0e1b30;color:#b9c7dc;padding:36px 0 44px;margin-top:40px;font-size:14.5px}
footer a{color:#8fc0f0}
footer .dis{max-width:80ch}
footer p{margin:10px 0}
.copybtn-done{background:#28c76f !important}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .app{grid-template-columns:1fr}
  .nav{display:none}
  .hero{padding-top:36px}
  .code{font-size:22px}
}
/* ===== v2 (2026-10-31): calculator, guides hub, inner pages ===== */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc label{display:block;font-size:13.5px;font-weight:700;color:var(--muted);margin-bottom:6px}
.calc input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:16px;background:#fff;color:var(--ink)}
.calc input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
.calc-out{background:#eef4fb;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:16px}
.calc-out .row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:15.5px}
.calc-out .row:last-child{border-bottom:0}
.calc-out .row b{font-variant-numeric:tabular-nums;white-space:nowrap}
.calc-note{font-size:13px;color:var(--muted);margin:12px 0 0}
.hub{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.hub a{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.hub a:hover{text-decoration:none;border-color:var(--accent);box-shadow:0 8px 24px rgba(15,115,199,.10)}
.hub h3{margin:0 0 6px;font-size:17.5px;color:var(--accent-deep)}
.hub p{margin:0;font-size:14.5px;color:var(--muted)}
.related{display:flex;flex-wrap:wrap;gap:10px}
.related a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:700;font-size:14.5px;color:var(--accent-deep)}
.related a:hover{text-decoration:none;border-color:var(--accent);background:var(--accent-soft)}
.page-hero{padding:46px 0 6px}
.page-hero h1{font-size:clamp(26px,3.4vw,36px)}
.page-hero .lede{font-size:17.5px}
.crumbs{font-size:13.5px;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--accent)}
.kv{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:860px){.calc{grid-template-columns:1fr}.hub{grid-template-columns:1fr}.kv{grid-template-columns:1fr}}
/* ===== v6 (2026-10-31): footer directory ===== */
.footdir{display:flex;flex-wrap:wrap;gap:8px 18px;margin:14px 0 4px;font-size:13.5px}
.footdir a{color:#8fc0f0;text-decoration:none}
.footdir a:hover{text-decoration:underline}
@media (max-width:860px){.footdir{gap:6px 12px;font-size:13px}}
/* ===== v7 (2026-10-31): reader comments ===== */
.rv-head{display:flex;flex-wrap:wrap;gap:20px;align-items:center;margin-bottom:18px}
.rv-avg{display:flex;align-items:center;gap:10px}
.rv-avg .num{font-size:34px;font-weight:800}
.rv-stars{color:#f5a623;letter-spacing:1px;font-size:15px}
.rv-bars{flex:1;min-width:250px;max-width:380px}
.rv-bar{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin:3px 0}
.rv-bar .track{flex:1;height:8px;background:#e7edf6;border-radius:99px;overflow:hidden}
.rv-bar .fill{display:block;height:100%;background:#f5a623;border-radius:99px}
.rv-form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.rv-form .row{display:grid;grid-template-columns:1fr 170px;gap:12px;margin-bottom:12px}
.rv-form input,.rv-form textarea,.rv-form select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:16px;background:#fff;color:var(--ink)}
.rv-form textarea{min-height:92px;resize:vertical}
.rv-form label{display:block;font-size:13.5px;font-weight:700;color:var(--muted);margin-bottom:6px}
.rv-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.rv-msg{font-size:14.5px;margin-top:10px;min-height:20px}
.rv-msg.ok{color:#147a4f}
.rv-msg.err{color:#b3261e}
.rv-list{display:flex;flex-direction:column;gap:14px}
.rv-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.rv-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rv-name{font-weight:800;font-size:15.5px}
.rv-badge{background:var(--accent);color:#fff;border-radius:999px;padding:2px 10px;font-size:11.5px;font-weight:800}
.rv-date{color:var(--muted);font-size:13px;margin-left:auto}
.rv-text{margin:8px 0;font-size:15.5px}
.rv-actions{display:flex;gap:12px;align-items:center}
.rv-like,.rv-reply-btn{background:none;border:1px solid var(--line);border-radius:999px;padding:4px 12px;cursor:pointer;font:inherit;font-size:13.5px;color:var(--muted)}
.rv-like:hover,.rv-reply-btn:hover{border-color:var(--accent);color:var(--accent-deep)}
.rv-like.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-deep)}
.rv-children{margin:12px 0 0 26px;display:flex;flex-direction:column;gap:12px}
.rv-children .rv-card{background:#f7fafd}
.rv-reply-form{margin-top:12px;display:grid;gap:10px}
.rv-reply-form input,.rv-reply-form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:15px}
.rv-reply-form textarea{min-height:70px;resize:vertical}
.rv-collapsed{display:none}
.rv-more{display:block;margin:14px auto 0;background:#fff;border:2px solid var(--accent);color:var(--accent-deep);border-radius:999px;padding:10px 24px;font-weight:800;cursor:pointer;font-size:15px}
.rv-more:hover{background:var(--accent-soft)}
@media (max-width:860px){.rv-form .row{grid-template-columns:1fr}.rv-children{margin-left:12px}.rv-date{margin-left:0}}
/* ===== v9 (2026-10-31): on-this-page TOC ===== */
.toc{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:26px 0 4px;font-size:14.5px}
.toc b{font-weight:800;color:var(--ink);white-space:nowrap}
.toc a{color:var(--accent-deep);font-weight:600}
.toc a:hover{color:var(--accent)}
@media (max-width:860px){.toc{gap:6px 12px;font-size:13.5px}}