:root{
  --brand:#ff6a1a;
  --brand-dark:#e8540a;
  --brand-soft:#fff3ec;
  --ink:#1f2530;
  --ink-soft:#5b6573;
  --line:#eef0f4;
  --bg:#ffffff;
  --bg-alt:#f7f9fc;
  --radius:16px;
  --shadow:0 10px 30px rgba(31,37,48,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:min(1160px,92%);margin:0 auto}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:24px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.logo-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:800;
  box-shadow:0 4px 12px rgba(255,106,26,.4);
}
.main-nav{display:flex;gap:26px;margin-left:14px;flex:1}
.main-nav a{color:var(--ink-soft);font-size:15px;font-weight:500;transition:color .2s}
.main-nav a:hover{color:var(--brand)}
.nav-cta{margin-left:auto}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-direction:column;
  padding:11px 22px;border-radius:12px;font-weight:700;font-size:15px;
  cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s;line-height:1.2;
}
.btn small{font-weight:500;opacity:.85;font-size:12px}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;box-shadow:0 6px 18px rgba(255,106,26,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,106,26,.45)}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-soft)}
.btn-light{background:#fff;color:var(--brand-dark)}
.btn-light:hover{transform:translateY(-2px)}
.btn-lg{padding:15px 30px;font-size:17px;border-radius:14px}
.btn-block{display:flex;width:100%}

/* Hero */
.hero{padding:64px 0 40px;background:radial-gradient(1200px 500px at 80% -10%,var(--brand-soft),transparent),var(--bg)}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.eyebrow{color:var(--brand-dark);font-weight:700;font-size:14px;letter-spacing:.5px;margin-bottom:14px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;margin:0 0 18px}
.hero h1 .hl{background:linear-gradient(135deg,var(--brand),var(--brand-dark));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;color:var(--ink-soft);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.hero-stats{display:flex;gap:36px;list-style:none;padding:0;margin:0}
.hero-stats strong{display:block;font-size:26px;color:var(--brand-dark);font-weight:800}
.hero-stats span{color:var(--ink-soft);font-size:14px}

/* Hero visual / 输入法条 */
.hero-visual{display:grid;place-items:center}
.ime-bar{
  width:100%;max-width:380px;background:#fff;border-radius:18px;
  box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden;
  transform:rotate(-1.5deg);
}
.ime-input{padding:16px 20px;font-size:18px;color:var(--ink-soft);border-bottom:1px solid var(--line);letter-spacing:2px}
.ime-cands{display:flex;flex-direction:column}
.cand{padding:12px 20px;font-size:16px;border-bottom:1px solid var(--line)}
.cand:last-child{border-bottom:0}
.cand.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:700}

/* Sections */
.section{padding:72px 0}
.section-title{font-size:34px;text-align:center;font-weight:800;margin:0 0 12px}
.section-sub{text-align:center;color:var(--ink-soft);font-size:17px;margin:0 auto 44px;max-width:640px}

/* Download */
.download{background:var(--bg-alt)}
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.dl-icon{font-size:38px;margin-bottom:12px}
.dl-card h3{font-size:18px;margin:0 0 10px}
.dl-card p{color:var(--ink-soft);font-size:14px;flex:1;margin:0 0 18px}
.dl-alt{display:inline-block;margin-top:12px;color:var(--brand-dark);font-size:13px;font-weight:600}
.dl-alt:hover{text-decoration:underline}
.dl-arch{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.dl-arch a{font-size:12px;padding:4px 12px;border:1px solid var(--line);border-radius:20px;color:var(--ink-soft)}
.dl-arch a:hover{border-color:var(--brand);color:var(--brand)}

/* Features */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .2s,box-shadow .2s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-ic{font-size:34px;margin-bottom:14px}
.feature h3{margin:0 0 10px;font-size:20px}
.feature p{margin:0;color:var(--ink-soft);font-size:15px}

/* Products */
.products{background:var(--bg-alt)}
.product-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product{background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:28px}
.product h3{margin:0 0 10px;font-size:20px;color:var(--brand-dark)}
.product p{margin:0;color:var(--ink-soft);font-size:15px}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 22px}
.faq-list summary{font-weight:700;font-size:17px;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
.faq-list details[open] summary::after{content:"−"}
.faq-list p{margin:14px 0 0;color:var(--ink-soft)}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;text-align:center}
.cta-inner h2{font-size:32px;margin:0 0 12px}
.cta-inner p{font-size:18px;opacity:.95;margin:0 0 26px}

/* Footer */
.site-footer{background:#1c2230;color:#aeb6c4;padding:48px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:20px}
.footer-links{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}
.footer-links a{color:#aeb6c4;font-size:15px}
.footer-links a:hover{color:#fff}
.footer-note{font-size:13px;max-width:680px;margin:0}
.footer-copy{font-size:13px;color:#717b8c;margin:0}

/* 面包屑 */
.breadcrumb{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;color:var(--ink-soft)}
.breadcrumb a{color:var(--ink-soft)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--ink)}

/* 内容页 Hero */
.page-hero{padding:54px 0 30px;background:radial-gradient(900px 400px at 85% -10%,var(--brand-soft),transparent)}
.page-hero h1{font-size:38px;font-weight:800;margin:0 0 14px}
.page-hero .lead{margin-bottom:22px}
.page-hero .btn-lg{margin-right:12px}
.page-meta{display:flex;gap:24px;flex-wrap:wrap;color:var(--ink-soft);font-size:14px;margin-top:22px}
.page-meta b{color:var(--ink)}

/* 正文文章 */
.article{padding:56px 0}
.article h2{font-size:26px;margin:40px 0 14px}
.article h2:first-child{margin-top:0}
.article h3{font-size:19px;margin:26px 0 10px}
.article p{color:#3a4250;margin:0 0 14px}
.article ul{color:#3a4250;padding-left:22px;margin:0 0 16px}
.article li{margin:6px 0}
.article .lead{font-size:18px;color:var(--ink-soft)}

/* 步骤 */
.steps{counter-reset:step;display:grid;gap:16px;margin:20px 0}
.steps .step{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px 18px 60px}
.steps .step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;display:grid;place-items:center;font-weight:800;font-size:14px}
.steps .step h4{margin:0 0 4px;font-size:16px}
.steps .step p{margin:0;font-size:14px;color:var(--ink-soft)}

/* 系统要求表 */
.spec-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.spec-table th,.spec-table td{text-align:left;padding:12px 16px;border:1px solid var(--line)}
.spec-table th{background:var(--bg-alt);width:32%;font-weight:700}

/* 相关页面卡片 */
.related{background:var(--bg-alt);padding:56px 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.related-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;transition:transform .2s,box-shadow .2s}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.related-card h3{margin:0 0 8px;font-size:18px}
.related-card p{margin:0;color:var(--ink-soft);font-size:14px}

/* Responsive */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:34px}
  .main-nav{display:none}
  .download-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid,.product-row{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:29px}
  .section{padding:52px 0}
  .section-title{font-size:27px}
}
@media(max-width:560px){
  .download-grid{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .nav-cta{display:none}
}