/* WPS Office 仿官网设计系统 — 母版 https://wps.com（主色 #1F69E0·Inter/Gabarito·圆角卡片·居中 hero） */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#1f69e0;--brand-d:#1850b4;--brand-l:#eaf1fd;
  --ink:#14181f;--head:#2c2f31;--muted:#5f6470;--soft:#6b6b6b;
  --line:#e8eaf0;--bg:#fff;--bg2:#f5f7fb;--bg3:#eef2f9;
  --ok:#15a06a;--warn:#e0a300;
  --radius:14px;--radius-s:10px;--shadow:0 6px 28px rgba(20,32,64,.08);--shadow-s:0 2px 10px rgba(20,32,64,.06);
  --maxw:1160px;
}
html{scroll-behavior:smooth}
body{font-family:Inter,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--bg);line-height:1.62;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--maxw);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,h4{font-family:Gabarito,Inter,"Microsoft YaHei",sans-serif;line-height:1.2;color:var(--head);letter-spacing:-.01em}
h1{font-size:clamp(30px,4.6vw,52px);font-weight:700}
h2{font-size:clamp(23px,3vw,34px);font-weight:700;margin-top:6px}
h3{font-size:clamp(18px,2vw,22px);font-weight:600}
p{margin:.5em 0}

/* ---------- header ---------- */
.site-hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.site-hd .bar{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:8px}
.brand img{height:30px;width:auto}
.nav{display:flex;gap:22px;margin-left:8px;flex:1}
.nav a{color:#33363b;font-size:15px;font-weight:500}
.nav a:hover{color:var(--brand);text-decoration:none}
.hd-cta{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:10px;background:var(--brand);color:#fff;font-weight:600;font-size:15px;border:0;cursor:pointer;transition:background .15s,transform .15s}
.btn:hover{background:var(--brand-d);text-decoration:none;transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--head);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--bg2)}
.btn.big{padding:15px 34px;font-size:17px;border-radius:12px}
.signin{color:#33363b;font-weight:600;font-size:15px}

/* ---------- hero ---------- */
.hero{background:radial-gradient(1100px 460px at 50% -8%,var(--brand-l),transparent 60%),linear-gradient(180deg,#fbfcff,#fff);text-align:center;padding:62px 0 26px}
.hero .eyebrow{display:inline-block;background:var(--brand-l);color:var(--brand-d);font-weight:600;font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{max-width:900px;margin:0 auto}
.hero .accent{color:var(--brand)}
.hero .lead{max-width:680px;margin:18px auto 26px;font-size:clamp(16px,2vw,20px);color:var(--muted)}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;align-items:center}
.hero .os-note{margin-top:12px;color:var(--soft);font-size:14px}
.hero-shot{margin:34px auto 0;max-width:940px;border-radius:18px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--line)}

/* ---------- app suite icons ---------- */
.suite{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;padding:28px 0 6px}
.suite .app{display:flex;flex-direction:column;align-items:center;gap:8px;width:84px}
.suite .app .tile{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-s)}
.suite .app small{color:var(--muted);font-size:12px;font-weight:500}

/* ---------- sections ---------- */
.band{padding:52px 0}
.band.alt{background:var(--bg2)}
.kicker{color:var(--brand);font-weight:700;font-size:14px;letter-spacing:.04em;text-transform:uppercase}
.lede{max-width:760px;color:var(--muted);font-size:17px;margin-top:8px}
.answer{color:#3a3f49;font-size:16px;margin:.35em 0 .2em;max-width:780px}
.feature{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin:34px 0}
.feature.rev .fig{order:2}
.feature .fig{border-radius:16px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.feature .fig img{width:100%;height:auto}
.feature .txt h2,.feature .txt h3{margin-bottom:6px}
@media(max-width:820px){.feature{grid-template-columns:1fr}.feature.rev .fig{order:0}.nav{display:none}}

/* cards grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
@media(max-width:820px){.grid{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-s)}
.card .ic{width:42px;height:42px;border-radius:11px;background:var(--brand-l);display:flex;align-items:center;justify-content:center;color:var(--brand);margin-bottom:12px}
.card h3{font-size:18px}
.card p{color:var(--muted);font-size:15px;margin-top:6px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px;counter-reset:s}
@media(max-width:820px){.steps{grid-template-columns:1fr 1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;position:relative}
.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;font-size:15px}
.step h3{font-size:16px;margin:8px 0 4px}
.step p{color:var(--muted);font-size:14px}

/* table */
.tablewrap{overflow-x:auto;margin-top:24px;border:1px solid var(--line);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:15px;background:#fff}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--bg3);font-weight:600;color:var(--head)}
tr:last-child td{border-bottom:0}
td .yes{color:var(--ok);font-weight:600}
td .no{color:#c0392b;font-weight:600}

/* trust strip */
.trust{padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.trust .row{display:flex;align-items:center;justify-content:center;gap:34px;flex-wrap:wrap;color:var(--soft);font-weight:600;font-size:15px}
.trust .row .m{display:flex;align-items:center;gap:8px}

/* sources + related */
.sources{color:var(--muted);font-size:14px;margin-top:26px;padding-top:16px;border-top:1px dashed var(--line)}
.sources a{color:var(--brand)}
.related{display:flex;gap:8px 18px;flex-wrap:wrap;margin-top:14px;font-size:15px}
.crumb{font-size:14px;color:var(--muted);margin:18px 0 4px}
.crumb a{color:var(--muted)}
.crumbs{font-size:14px;color:var(--muted);margin:14px 0 2px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}

/* FAQ */
.faq{margin-top:24px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:600;color:var(--head);list-style:none;display:flex;justify-content:space-between;gap:12px;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-weight:700;font-size:20px}
.faq details[open] summary::after{content:"\2212"}
.faq .a{padding:0 20px 18px;color:var(--muted);font-size:15px}

/* tool */
.tool{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow-s);margin-top:24px}
.tool .field{margin:14px 0}
.tool label{font-weight:600;display:block;margin-bottom:6px;color:var(--head)}
.tool select,.tool input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff}
.tool .out{margin-top:18px;padding:18px;border-radius:12px;background:var(--brand-l);color:var(--brand-d);font-weight:600;min-height:54px;line-height:1.7}
.tool .badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:600;margin-left:8px}
.tool .badge.ok{background:#e3f6ee;color:var(--ok)}
.tool .badge.no{background:#fdecea;color:#c0392b}

/* download page */
.dlcards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
@media(max-width:820px){.dlcards{grid-template-columns:1fr 1fr}}
.dlcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;text-align:center;box-shadow:var(--shadow-s)}
.dlcard .ic{width:50px;height:50px;margin:0 auto 12px;color:var(--brand)}
.dlcard h3{font-size:17px}
.dlcard p{color:var(--muted);font-size:13px;margin:6px 0 14px}

/* misc */
.lead-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
@media(max-width:820px){.lead-grid{grid-template-columns:1fr}}
.note{background:var(--brand-l);border-left:3px solid var(--brand);padding:14px 18px;border-radius:0 10px 10px 0;margin:20px 0;color:#33405c}
ul.ticks{list-style:none;margin:14px 0}
ul.ticks li{padding:6px 0 6px 28px;position:relative;color:#3a3f49}
ul.ticks li::before{content:"";position:absolute;left:0;top:11px;width:16px;height:16px;border-radius:50%;background:var(--brand-l)}
.intro{font-size:18px;color:#3a3f49;max-width:820px;margin-top:14px}

/* footer */
.site-ft{background:#0f1726;color:#c6ccd8;padding:46px 0 30px;margin-top:60px}
.site-ft a{color:#c6ccd8}
.site-ft a:hover{color:#fff}
.site-ft .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
@media(max-width:820px){.site-ft .cols{grid-template-columns:1fr 1fr}}
.site-ft .ftmark{display:flex;align-items:center;gap:8px;color:#fff;font-family:Gabarito,sans-serif;font-weight:700;font-size:19px;margin-bottom:10px}
.site-ft h4{color:#fff;font-size:14px;margin-bottom:12px;letter-spacing:.03em}
.site-ft nav{display:flex;flex-direction:column;gap:9px;font-size:14px}
.site-ft .copy{margin-top:30px;padding-top:18px;border-top:1px solid #243049;font-size:13px;color:#8a93a6;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}