/* 2345看图王 仿官网视觉（母版 https://pic.2345.cc）·主色 #0084ff·干净蓝白·圆角卡片 */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#0084ff;--brand-d:#0066d6;--brand-l:#e8f3ff;
  --ink:#1b263d;--muted:#5f6470;--line:#e7ebf2;--bg:#fff;--soft:#f5f8fd;
  --radius:14px;--shadow:0 10px 34px rgba(18,52,96,.10);--maxw:1160px;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
.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{line-height:1.25;color:var(--ink);font-weight:800}
h1{font-size:38px;letter-spacing:-.5px}
h2{font-size:27px;margin:38px 0 10px}
h3{font-size:20px;margin:24px 0 8px}
p{margin:10px 0}

/* ---- header ---- */
.site-hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.site-hd .bar{display:flex;align-items:center;gap:26px;height:66px}
.brand{display:flex;align-items:center}
.logo-img{height:34px;width:auto}
.nav{display:flex;gap:24px;margin-left:8px;flex:1}
.nav a{color:var(--ink);font-weight:600;font-size:15px}
.nav a:hover{color:var(--brand);text-decoration:none}
.btn{display:inline-block;padding:10px 26px;border-radius:999px;background:var(--brand);color:#fff;font-weight:700;box-shadow:0 8px 20px rgba(0,132,255,.28);transition:.15s}
.btn:hover{background:var(--brand-d);text-decoration:none;transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand);box-shadow:none}
.btn.lg{padding:14px 38px;font-size:17px}

/* ---- hero ---- */
.hero{background:linear-gradient(180deg,#eaf4ff 0%,#f6faff 60%,#fff 100%);padding:62px 0 54px;border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:46px;align-items:center}
.hero h1{font-size:43px;margin-bottom:16px}
.hero .lede{font-size:18px;color:var(--muted);margin-bottom:26px;max-width:33em}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero .meta{margin-top:18px;color:var(--muted);font-size:13.5px;display:flex;gap:18px;flex-wrap:wrap}
.hero .meta b{color:var(--ink)}
.hero-pic{border-radius:var(--radius);overflow:hidden}
.hero-pic img{width:100%;border-radius:var(--radius)}
.badge{display:inline-flex;align-items:center;gap:7px;background:var(--brand-l);color:var(--brand-d);font-weight:700;font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:16px}

/* ---- generic section ---- */
section.block{padding:18px 0}
.lead{font-size:17.5px;color:var(--muted);max-width:60em;margin:6px 0 8px}
.answer{background:var(--soft);border-left:3px solid var(--brand);padding:11px 16px;border-radius:0 10px 10px 0;color:#2a3550;margin:8px 0 6px;font-size:15.5px}
.kicker{color:var(--brand-d);font-weight:800;letter-spacing:.4px;text-transform:uppercase;font-size:13px}
.center{text-align:center}

/* ---- feature cards ---- */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow)}
.card h3{margin-top:0}
.card .ico{width:46px;height:46px;border-radius:12px;background:var(--brand-l);display:flex;align-items:center;justify-content:center;color:var(--brand-d);margin-bottom:12px}
.card.soft{box-shadow:none;background:var(--soft);border-color:transparent}
.pic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.pic-card img{width:100%}
.pic-card .cap{padding:14px 18px}
.pic-card .cap b{display:block;margin-bottom:3px}

/* ---- steps ---- */
.steps{counter-reset:s;display:grid;gap:14px}
.steps li{list-style:none;position:relative;padding:14px 16px 14px 58px;background:var(--soft);border-radius:12px}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:14px;top:13px;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}

/* ---- stat strip ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center;margin:8px 0}
.stats .n{font-size:32px;font-weight:800;color:var(--brand)}
.stats .l{color:var(--muted);font-size:14px}

/* ---- table ---- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--soft);font-weight:700;position:sticky;top:0}
tr:hover td{background:#fafcff}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:700}
.tag.y{background:#e6f7ec;color:#1a9e4b}.tag.n{background:#fdeaea;color:#d23b3b}.tag.p{background:#fff4e0;color:#c8881a}

/* ---- breadcrumb / related ---- */
.crumb{font-size:13.5px;color:var(--muted);padding:14px 0 2px}
.crumb a{color:var(--muted)}
.related{display:flex;flex-wrap:wrap;gap:8px 16px;margin:14px 0;font-size:14.5px}
.sources{color:var(--muted);font-size:13.5px;margin:16px 0;border-top:1px dashed var(--line);padding-top:12px}

/* ---- FAQ ---- */
.faq{display:grid;gap:10px;margin-top:14px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:0 18px;background:#fff;transition:.15s}
.faq details[open]{box-shadow:var(--shadow);border-color:#cfe3ff}
.faq summary{cursor:pointer;font-weight:700;padding:15px 0;list-style:none;position:relative;padding-right:28px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:2px;top:13px;font-size:22px;color:var(--brand);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq details>p{padding:0 0 16px;color:#3a455e;margin:0}

/* ---- download box ---- */
.dlbox{background:linear-gradient(135deg,#0084ff,#3aa0ff);color:#fff;border-radius:18px;padding:34px 34px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;box-shadow:0 18px 40px rgba(0,132,255,.3)}
.dlbox h2{color:#fff;margin:0 0 6px}
.dlbox p{color:rgba(255,255,255,.92);margin:0}
.dlbox .btn{background:#fff;color:var(--brand-d)}
.dlbox .btn:hover{background:#f0f6ff}

/* ---- section heading helper ---- */
.sec-h{margin:46px 0 6px}
.sec-h .kicker{display:block;margin-bottom:4px}

/* ---- footer ---- */
.site-ft{background:var(--ink);color:#c7cfe0;margin-top:60px;padding:40px 0}
.site-ft .cols{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.site-ft strong{color:#fff;font-size:18px;margin-left:8px}
.site-ft .ftmark{color:var(--brand);vertical-align:middle}
.site-ft a{color:#aeb8cd}
.site-ft .related{margin:0}
.ft-note{color:#7d879c;font-size:13px;margin-top:14px;border-top:1px solid #2c374f;padding-top:14px}

/* ---- responsive ---- */
@media(max-width:880px){
  .hero .wrap{grid-template-columns:1fr;gap:28px}
  .hero h1{font-size:32px}h1{font-size:30px}
  .g3,.g4{grid-template-columns:1fr 1fr}.stats{grid-template-columns:1fr 1fr}
  .nav{display:none}
}
@media(max-width:540px){.g2,.g3,.g4{grid-template-columns:1fr}}