/* 夸克 quark-site · 仿 www.quark.cn 视觉（白底 / 品牌蓝 #0658ff / 浅蓝渐变 hero / 交替图文 / 卡片栅格 / 奖项墙） */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#0658ff;--brand-d:#0046cc;--brand-50:#eef4ff;--brand-100:#dce8ff;
  --ink:#1d2129;--sub:#39404b;--muted:#5b6472;--line:#e9edf3;--bg:#fff;--soft:#f5f8ff;
  --radius:18px;--shadow:0 10px 34px rgba(13,40,110,.10);--shadow-s:0 4px 16px rgba(13,40,110,.07);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.66;-webkit-font-smoothing:antialiased}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.22;color:var(--ink);letter-spacing:-.2px}
p{color:var(--sub)}
.btn{display:inline-block;padding:11px 26px;border-radius:999px;background:var(--brand);color:#fff;font-weight:600;font-size:15px;transition:.15s;border:0;cursor:pointer}
.btn:hover{background:var(--brand-d);text-decoration:none}
.btn.ghost{background:#fff;color:var(--brand);box-shadow:inset 0 0 0 1.5px var(--brand-100)}
.btn.ghost:hover{background:var(--brand-50)}
.tag{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--brand-50);color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.3px}

/* header */
.site-hd{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center}
.logo-img{height:30px;width:auto}
.nav{display:flex;gap:24px;margin-left:8px;flex:1;flex-wrap:wrap}
.nav a{color:var(--sub);font-size:15px;font-weight:500}
.nav a:hover{color:var(--brand);text-decoration:none}
.hd-dl{padding:9px 22px}

/* hero */
.hero{position:relative;text-align:center;padding:64px 0 44px;background:linear-gradient(180deg,#eaf1ff 0%,#f4f8ff 42%,#fff 100%);overflow:hidden}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:46px;font-weight:800;margin:14px 0 16px}
.hero .lead{font-size:19px;color:var(--muted);max-width:660px;margin:0 auto 26px}
.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.hero-shot{max-width:940px;margin:0 auto;border-radius:20px;box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden;background:#fff}
.hero-shot img{width:100%;display:block}
.blob{position:absolute;border-radius:50%;filter:blur(48px);opacity:.5;z-index:1}
.blob.a{width:380px;height:380px;background:#bcd4ff;left:-120px;top:-60px}
.blob.b{width:320px;height:320px;background:#d8e4ff;right:-100px;top:20px}

/* generic section */
section{scroll-margin-top:80px}
.sec{padding:46px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 34px}
.sec-head h2{font-size:32px;font-weight:800}
.sec-head p{font-size:17px;color:var(--muted);margin-top:12px}
.eyebrow{color:var(--brand);font-weight:700;font-size:14px;letter-spacing:1px;text-transform:uppercase}

/* device strip */
.dev-strip{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.dev-strip .chip{display:flex;align-items:center;gap:8px;padding:10px 18px;border-radius:14px;background:var(--soft);border:1px solid var(--line);font-weight:600;color:var(--sub);font-size:14px}

/* alternating feature rows */
.frow{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;padding:38px 0}
.frow.rev .ftext{order:2}
.frow .fimg{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-s);border:1px solid var(--line);background:linear-gradient(160deg,#f1f6ff,#fff)}
.frow .fimg img{width:100%;display:block}
.frow h3{font-size:25px;font-weight:800;margin:12px 0 14px}
.frow .answer{font-size:16px;color:var(--sub);margin-bottom:16px}
.flist{list-style:none;display:grid;gap:12px}
.flist li{position:relative;padding-left:28px;color:var(--sub);font-size:15px}
.flist li::before{content:"";position:absolute;left:0;top:7px;width:16px;height:16px;border-radius:50%;background:var(--brand-50);box-shadow:inset 0 0 0 4px var(--brand)}

/* card grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-s);transition:.18s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .ico{width:46px;height:46px;border-radius:13px;background:var(--brand-50);display:flex;align-items:center;justify-content:center;color:var(--brand);margin-bottom:14px}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted)}
.card .answer{font-size:14.5px;color:var(--sub)}

/* content article (pillar/blog) */
.lede{font-size:18px;color:var(--muted);max-width:820px;margin:6px 0 8px}
.article h2{font-size:26px;font-weight:800;margin:38px 0 12px;padding-top:6px}
.article h3{font-size:20px;font-weight:700;margin:26px 0 10px}
.article .answer{background:var(--soft);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;padding:13px 18px;color:var(--sub);font-size:15.5px;margin:6px 0 14px}
.article p{margin:10px 0;color:var(--sub)}
.article img{border-radius:14px;border:1px solid var(--line);margin:18px 0;box-shadow:var(--shadow-s)}
.toc{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 6px}
.toc a{font-size:13.5px;background:var(--soft);border:1px solid var(--line);padding:7px 14px;border-radius:999px;color:var(--sub)}
.toc a:hover{color:var(--brand);border-color:var(--brand-100);text-decoration:none}
.layout{display:grid;grid-template-columns:1fr;gap:8px}

/* stats / numbers */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:8px 0}
.stat{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center}
.stat b{display:block;font-size:30px;color:var(--brand);font-weight:800}
.stat span{font-size:13.5px;color:var(--muted)}

/* cta band */
.cta-band{margin:54px 0 8px;border-radius:26px;background:linear-gradient(120deg,#0a5bff,#3f86ff);color:#fff;padding:46px;text-align:center;box-shadow:var(--shadow)}
.cta-band h2{color:#fff;font-size:28px;font-weight:800}
.cta-band p{color:rgba(255,255,255,.92);margin:12px 0 22px;font-size:16px}
.cta-btn{display:inline-block;padding:13px 34px;border-radius:999px;background:#fff;color:var(--brand);font-weight:700}
.cta-btn:hover{text-decoration:none;background:#f0f5ff}

/* awards wall */
.awards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.award{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px;font-size:13.5px;color:var(--sub);display:flex;align-items:center;gap:10px;min-height:64px}
.award svg{flex:none;color:var(--brand)}

/* sources + related */
.sources{font-size:13.5px;color:var(--muted);margin:24px 0 8px;border-top:1px dashed var(--line);padding-top:14px}
.sources a{color:var(--brand)}
.related{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;margin:8px 0}
.crumb{font-size:13px;color:var(--muted);margin:18px 0 4px}
.crumb a{color:var(--muted)}

/* faq */
.faq{display:grid;gap:10px;margin-top:14px}
.faq details{border:1px solid var(--line);border-radius:13px;padding:4px 18px;background:#fff;transition:.15s}
.faq details[open]{box-shadow:var(--shadow-s);border-color:var(--brand-100)}
.faq summary{cursor:pointer;font-weight:600;padding:13px 0;list-style:none;color:var(--ink);font-size:15.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq p{padding:0 0 14px;color:var(--muted);font-size:14.5px}

/* tool */
.tool-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-s);margin:18px 0}
.tool-card label{display:block;font-weight:600;font-size:14px;margin:14px 0 7px;color:var(--sub)}
.tool-card select,.tool-card input{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:12px;font-size:15px;background:var(--soft);color:var(--ink)}
.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tool-out{background:linear-gradient(135deg,var(--brand-50),#fff);border:1px solid var(--brand-100);border-radius:14px;padding:22px;margin-top:18px}
.tool-out .big{font-size:30px;font-weight:800;color:var(--brand)}
table.data{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
table.data th,table.data td{border:1px solid var(--line);padding:10px 12px;text-align:left}
table.data th{background:var(--soft);font-weight:700;color:var(--sub)}
table.data tr:nth-child(even) td{background:#fbfdff}

/* download */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center;box-shadow:var(--shadow-s)}
.dl-card .ico{width:54px;height:54px;border-radius:15px;background:var(--brand-50);display:flex;align-items:center;justify-content:center;color:var(--brand);margin:0 auto 14px}
.dl-card h3{font-size:18px;margin-bottom:6px}
.dl-card p{font-size:13.5px;color:var(--muted);margin-bottom:16px}

/* footer */
.site-ft{margin-top:60px;border-top:1px solid var(--line);background:var(--soft)}
.ft-top{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px 22px;flex-wrap:wrap}
.ft-brand{display:flex;align-items:center;gap:12px}
.ft-brand strong{font-size:18px}
.ft-tag{color:var(--muted);font-size:13px}
.ft-nav{margin:0}
.ft-nav a{color:var(--sub)}
.ft-bot{padding:0 22px 28px;color:var(--muted);font-size:13px}

@media(max-width:820px){
  .hero h1{font-size:33px}
  .frow,.grid,.awards,.stats,.dl-grid,.tool-grid{grid-template-columns:1fr}
  .frow.rev .ftext{order:0}
  .nav{display:none}
  .sec-head h2{font-size:26px}
}