:root{
  --brand:#0a5cff;
  --brand-dark:#003cad;
  --accent:#00c896;
  --ink:#0d1222;
  --ink-2:#3c4663;
  --ink-3:#68718c;
  --line:#e4e8f2;
  --bg:#ffffff;
  --bg-soft:#f5f8ff;
  --bg-deep:#08132f;
  --max:1180px;
  --radius:16px;
  --shadow:0 10px 30px rgba(13,18,34,.07);
  --shadow-lg:0 22px 60px rgba(13,18,34,.14);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.3;margin:0 0 .6em;font-weight:700;letter-spacing:-.01em}
h1{font-size:2.35rem}
h2{font-size:1.7rem}
h3{font-size:1.15rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.35em 0}
strong{font-weight:700}
code{background:var(--bg-soft);border:1px solid var(--line);border-radius:6px;padding:.1em .4em;font-size:.9em}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand img{width:32px;height:32px;border-radius:9px}
.brand span b{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-links a{color:var(--ink-2);font-size:.95rem;font-weight:500;white-space:nowrap}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--brand);text-decoration:none}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;width:40px;height:36px;cursor:pointer;color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:.98rem;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease;text-align:center}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),#3d7bff);color:#fff;box-shadow:0 10px 24px rgba(10,92,255,.28)}
.btn-primary:hover{box-shadow:0 14px 32px rgba(10,92,255,.36)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:9px 18px;font-size:.9rem}
.btn-block{width:100%}
.actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- hero ---------- */
.hero{background:radial-gradient(1200px 520px at 82% -12%,rgba(0,200,150,.22),transparent 62%),linear-gradient(160deg,#0a1c46 0%,#08132f 52%,#061024 100%);color:#fff;padding:74px 0 66px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;width:520px;height:520px;right:-160px;bottom:-260px;background:radial-gradient(circle,rgba(10,92,255,.5),transparent 66%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:46px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#cfe0ff;border-radius:999px;padding:6px 14px;font-size:.82rem;margin-bottom:20px}
.hero h1{font-size:2.9rem;margin-bottom:.45em;color:#fff}
.hero h1 em{font-style:normal;color:#5ff0c4}
.hero-sub{font-size:1.08rem;color:#c3d0ec;max-width:34em}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:22px 0 26px}
.hero-facts li{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:7px 13px;font-size:.85rem;color:#dbe6ff}
.hero .btn-outline{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.hero .btn-outline:hover{border-color:#fff;color:#fff}
.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:20px;padding:24px;box-shadow:0 24px 60px rgba(0,0,0,.28);backdrop-filter:blur(6px)}
.hero-card h3{font-size:1rem;color:#a9bde6;margin-bottom:14px;font-weight:600}
.metric{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.metric div{background:rgba(8,19,47,.55);border-radius:14px;padding:14px}
.metric dt{font-size:.8rem;color:#93a8d4;margin:0}
.metric dd{margin:2px 0 0;font-size:1.5rem;font-weight:800;color:#fff}
.metric dd small{font-size:.75rem;font-weight:600;color:#7fe8c4;margin-left:4px}
.hero-note{margin:14px 0 0;font-size:.82rem;color:#9db2dd}

/* ---------- sections ---------- */
.section{padding:70px 0}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin:0 auto 40px;text-align:center}
.section-head h2{margin-bottom:.4em}
.section-head p{color:var(--ink-2);margin:0}
.section-head p.answer-lede{color:var(--ink);font-size:1.05rem;font-weight:500}
.kicker{display:block;color:var(--brand);font-weight:700;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}

/* ---------- cards ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card h3{margin-bottom:.4em}
.card p{margin:0;color:var(--ink-2);font-size:.95rem}
.card-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(10,92,255,.12),rgba(0,200,150,.16));margin-bottom:14px;font-size:1.2rem}
.card ul{margin:0;padding-left:1.1em;color:var(--ink-2);font-size:.93rem}
.step-no{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-size:.85rem;font-weight:700;margin-bottom:12px}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:560px}
caption{text-align:left;padding:14px 18px;font-size:.86rem;color:var(--ink-3);border-bottom:1px solid var(--line)}
th,td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--bg-soft);font-weight:700;color:var(--ink);white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
td b{color:var(--brand)}
.compare tr td:first-child{font-weight:600}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0;overflow:hidden;box-shadow:var(--shadow)}
.faq-list summary{cursor:pointer;padding:16px 20px;font-weight:600;font-size:1.02rem;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:flex-start}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--brand);font-weight:800;font-size:1.2rem;line-height:1}
.faq-list details[open] summary::after{content:"\2013"}
.faq-list .faq-a{padding:0 20px 18px;margin:0;color:var(--ink-2);border-top:1px solid var(--line);padding-top:14px}
.faq-list .faq-a p:last-child{margin-bottom:0}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.price.featured{border:2px solid var(--brand);box-shadow:var(--shadow-lg);position:relative}
.price.featured::before{content:"推荐";position:absolute;top:-13px;left:26px;background:var(--brand);color:#fff;font-size:.75rem;font-weight:700;padding:4px 12px;border-radius:999px}
.price h3{font-size:1.05rem}
.price .amount{font-size:2rem;font-weight:800;margin:.2em 0 .1em}
.price .amount small{font-size:.82rem;font-weight:600;color:var(--ink-3)}
.price ul{flex:1;padding-left:1.1em;color:var(--ink-2);font-size:.93rem}

/* ---------- reviews ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.quote blockquote{margin:0 0 14px;color:var(--ink);font-size:.98rem}
.quote figcaption{font-size:.86rem;color:var(--ink-3);display:flex;align-items:center;gap:10px}
.stars{color:#ffb020;letter-spacing:2px;font-size:.9rem}

/* ---------- download strip ---------- */
.cta-strip{background:linear-gradient(135deg,var(--brand-dark),#0a5cff 55%,#00a67d);color:#fff;padding:52px 0;text-align:center}
.cta-strip h2{color:#fff}
.cta-strip p{color:#d9e6ff;max-width:42em;margin:0 auto 24px}
.cta-strip .actions{justify-content:center}
.cta-strip .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 12px 30px rgba(0,0,0,.22)}
.cta-strip .btn-outline{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.sys-req{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;list-style:none;padding:0;margin:22px 0 0}
.sys-req li{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);border-radius:999px;padding:6px 14px;font-size:.85rem}

/* ---------- breadcrumb ---------- */
.crumbs{font-size:.85rem;color:var(--ink-3);padding:16px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.crumbs li+li::before{content:"/";margin-right:8px;color:#c3cadf}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}

/* ---------- article / prose ---------- */
.page-head{padding:34px 0 12px}
.page-head h1{font-size:2.1rem;margin-bottom:.35em}
.tldr{background:var(--bg-soft);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:18px 20px;margin:0 0 28px}
.tldr p:last-child{margin-bottom:0}
.prose{max-width:820px}
.prose h2{margin-top:1.6em;font-size:1.45rem}
.prose h3{margin-top:1.3em}
.prose ul li{margin:.4em 0}
.prose .lead{font-size:1.08rem;color:var(--ink-2)}
.meta-line{font-size:.85rem;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px}
.tag{background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;padding:3px 12px;font-size:.8rem;color:var(--ink-2)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start}
.toc-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:20px;font-size:.9rem;position:sticky;top:88px}
.toc-box h2{font-size:.95rem;margin-bottom:.6em}
.toc-box ol{padding-left:1.1em;margin:0}
.toc-box a{color:var(--ink-2)}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.post-card h3{font-size:1.02rem;margin-bottom:.35em}
.post-card h3 a{color:var(--ink)}
.post-card h3 a:hover{color:var(--brand)}
.post-card p{color:var(--ink-2);font-size:.92rem;flex:1}
.post-meta{font-size:.8rem;color:var(--ink-3);margin:0 0 10px}

/* ---------- footer ---------- */
.site-footer{background:#0b152e;color:#a8b6d6;padding:56px 0 26px;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:34px}
.site-footer h2,.site-footer h3{color:#fff;font-size:.95rem;margin-bottom:12px;letter-spacing:.02em}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:7px 0}
.site-footer a{color:#a8b6d6}
.site-footer a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.1rem;margin-bottom:12px}
.footer-brand img{width:30px;height:30px;border-radius:9px}
.footer-brand:hover{text-decoration:none}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:#7f8fb4;font-size:.85rem}
.updated{color:#7f8fb4}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .hero-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr}
  .toc-box{position:static}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;left:0;right:0;top:64px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 24px 16px;margin:0;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 0;border-bottom:1px solid var(--line)}
  .nav{position:relative}
  h1{font-size:1.85rem}
  .hero{padding:52px 0 46px}
  .hero h1{font-size:2.15rem}
  h2{font-size:1.4rem}
  .section{padding:50px 0}
  .grid-2,.grid-3,.grid-4,.price-grid,.quote-grid,.blog-grid{grid-template-columns:1fr}
  .container{padding:0 18px}
  .cta-strip{padding:40px 0}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* theme:speed-orange - delete this block to roll back */
:root{--brand:#ff5a1f;--brand-dark:#d93a05;--accent:#ffb300;--max:1280px;--radius:14px;--bg-soft:#fff6f1;--shadow:0 12px 30px rgba(255,90,31,.10)}
.hero{background:radial-gradient(1000px 500px at 85% -6%,rgba(255,179,0,.26),transparent 60%),linear-gradient(155deg,#40160a 0%,#331008 55%,#230a04 100%)}
.btn-primary{background:linear-gradient(135deg,var(--brand),#ff8a3d);box-shadow:0 10px 26px rgba(255,90,31,.34)}
.grid-3>.card:first-child,.grid>.card:first-child{grid-column:span 2}
.card{border:1px solid #ffe0cf}
.quote-grid{grid-template-columns:repeat(3,1fr)}
@media (max-width:1199px){.grid-3>.card:first-child,.grid>.card:first-child{grid-column:span 1}.quote-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:767px){.quote-grid{grid-template-columns:1fr}}