/* ToDesk 仿官网视觉·静态还原（主色 #0070f9·浅蓝渐变·圆角卡片·PingFang 字族） */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#0070f9;--brand-600:#0a5fd0;--brand-50:#eaf3ff;
  --ink:#1f2126;--ink-2:#444546;--muted:#74757a;--line:#e7eaf0;
  --bg:#fff;--bg-soft:#f5f9ff;--bg-blue:#eef4ff;--cyan:#13d0e0;
  --radius:16px;--shadow:0 10px 36px rgba(20,52,120,.10);--shadow-sm:0 4px 16px rgba(20,52,120,.07);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-600)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.25;color:var(--ink);font-weight:700}
p{color:var(--ink-2)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 26px;border-radius:999px;background:var(--brand);color:#fff;font-weight:600;box-shadow:0 8px 20px rgba(0,112,249,.28);transition:transform .15s,box-shadow .15s}
.btn:hover{color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(0,112,249,.36)}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid #cfe0ff;box-shadow:none}
.btn.ghost:hover{background:var(--brand-50)}
.btn.lg{padding:14px 34px;font-size:17px}

/* 头部 */
.site-hd{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)}
.bar{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center}
.brand img{height:26px;width:auto}
.nav{display:flex;gap:26px;margin-left:8px;flex:1}
.nav a{color:var(--ink-2);font-weight:500;font-size:15px;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover{color:var(--brand);border-bottom-color:var(--brand)}

/* Hero */
.hero{background:radial-gradient(1200px 500px at 80% -10%,#dcebff,transparent),linear-gradient(180deg,#f3f8ff 0%,#fff 78%);padding:64px 0 40px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.hero .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--brand-50);color:var(--brand);font-weight:600;font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:46px;letter-spacing:-.5px;margin-bottom:18px}
.hero h1 .hl{color:var(--brand)}
.hero .sub{font-size:18px;color:var(--muted);margin-bottom:26px;max-width:560px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero .trust{margin-top:22px;color:var(--muted);font-size:14px}
.hero-art{position:relative}
.hero-art picture,.hero-art img{border-radius:20px;width:100%}
.hero-badges{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13px;color:var(--ink-2);box-shadow:var(--shadow-sm)}
.chip b{color:var(--brand)}

/* 统计条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:34px 0 6px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow-sm)}
.stat .num{font-size:30px;font-weight:800;color:var(--brand)}
.stat .lab{color:var(--muted);font-size:14px;margin-top:4px}

/* 通用区块 */
section.band{padding:56px 0}
section.band.soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 38px}
.sec-head h2{font-size:32px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:17px}

/* 功能卡片栅格 */
.grid{display:grid;gap:22px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card .ico{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),#1aa7ff);margin-bottom:16px}
.card .ico svg{width:26px;height:26px;color:#fff}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin:40px 0}
.feature-row.flip .ft-art{order:-1}
.feature-row img{border-radius:var(--radius);box-shadow:var(--shadow)}
.feature-row h3{font-size:24px;margin-bottom:12px}
.feature-row ul{list-style:none;margin-top:14px}
.feature-row li{padding-left:26px;position:relative;color:var(--ink-2);margin-bottom:8px}
.feature-row li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:50%;background:var(--brand-50);box-shadow:inset 0 0 0 4px var(--brand)}

/* 文章型正文（支柱/博客/FAQ） */
.article{max-width:860px;margin:0 auto;padding:44px 0}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.article h1{font-size:36px;margin-bottom:16px;letter-spacing:-.4px}
.article .lead{font-size:18px;color:var(--ink-2);background:var(--bg-soft);border-left:4px solid var(--brand);padding:16px 20px;border-radius:10px;margin-bottom:30px}
.article h2{font-size:25px;margin:38px 0 10px;padding-top:8px}
.article h3{font-size:20px;margin:26px 0 8px}
.article p{margin-bottom:14px}
.article .answer{font-size:16px;color:var(--ink);background:#fff;border:1px solid #dce8ff;border-left:4px solid var(--brand);padding:12px 16px;border-radius:8px;margin:6px 0 14px;font-weight:500}
.article figure{margin:22px 0}
.article figure img{border-radius:var(--radius);box-shadow:var(--shadow-sm);width:100%}
.article figcaption{color:var(--muted);font-size:13px;text-align:center;margin-top:8px}
.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:28px}
.toc strong{display:block;margin-bottom:8px}
.toc a{color:var(--ink-2);font-size:15px;display:inline-block;margin:3px 14px 3px 0}

/* FAQ 手风琴 */
.faq{margin-top:18px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:0 18px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:600;padding:15px 0;list-style:none;position:relative;padding-right:30px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:13px;font-size:22px;color:var(--brand);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq details p{color:var(--ink-2);padding:14px 0 18px;font-size:15px}

/* 来源 / 相关阅读 */
.sources{font-size:14px;color:var(--muted);margin-top:30px;padding-top:18px;border-top:1px dashed var(--line)}
.sources a{color:var(--ink-2)}
.related-box{margin-top:28px;background:var(--bg-soft);border-radius:12px;padding:18px 22px}
.related-box strong{display:block;margin-bottom:8px}
.related-box a{margin:3px 16px 3px 0;display:inline-block}

/* 表格（工具/对比） */
.tbl{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm)}
.tbl th,.tbl td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{background:var(--brand-50);color:var(--ink);font-weight:600}
.tbl tr:last-child td{border-bottom:none}
.tbl .good{color:#0a8f5b;font-weight:600}

/* 工具 */
.tool{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin:24px 0}
.tool .row{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:16px}
.tool .fld{flex:1;min-width:200px}
.tool label{display:block;font-weight:600;font-size:14px;margin-bottom:6px}
.tool select,.tool input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:var(--bg-soft)}
.tool .out{background:var(--brand-50);border-radius:12px;padding:20px;margin-top:8px}
.tool .out .big{font-size:30px;font-weight:800;color:var(--brand)}
.tool .out .note{color:var(--muted);font-size:14px;margin-top:6px}

/* 下载页 */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:8px 0 6px}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;box-shadow:var(--shadow-sm)}
.dl-card .pico{width:54px;height:54px;margin:0 auto 14px;color:var(--brand)}
.dl-card h3{font-size:19px;margin-bottom:6px}
.dl-card p{color:var(--muted);font-size:14px;margin-bottom:16px}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:10px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 18px 18px;box-shadow:var(--shadow-sm)}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:18px;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}
.step h4{margin:6px 0 6px;font-size:16px}
.step p{color:var(--muted);font-size:14px}

/* CTA 区 */
.cta-band{background:linear-gradient(120deg,var(--brand),#1aa7ff);border-radius:24px;padding:44px;text-align:center;color:#fff;margin:46px 0}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:22px}
.cta-band .btn{background:#fff;color:var(--brand)}
.cta-band .btn:hover{background:#f0f5ff}

/* 页脚 */
.site-ft{background:#0f1117;color:#aeb3bf;padding:44px 0;margin-top:30px}
.ftgrid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.ftbrand{max-width:420px}
.ftbrand strong{color:#fff;font-size:18px;margin-left:8px;vertical-align:middle}
.ftmark{display:inline-block;vertical-align:middle}
.ftnote{color:#7c818c;font-size:13px;margin-top:12px}
.related{display:flex;flex-wrap:wrap;gap:14px 22px;max-width:560px}
.site-ft .related a{color:#aeb3bf;font-size:14px}
.site-ft .related a:hover{color:#fff}

/* 响应式 */
@media(max-width:880px){
  .hero .wrap{grid-template-columns:1fr;gap:28px}
  .hero h1{font-size:34px}
  .stats,.grid.c3,.grid.c4,.dl-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .feature-row,.grid.c2{grid-template-columns:1fr}
  .feature-row.flip .ft-art{order:0}
  .nav{display:none}
  .article h1{font-size:28px}
}
@media(max-width:520px){.stats,.grid.c3,.grid.c4,.dl-grid,.steps{grid-template-columns:1fr}}