*{margin:0;padding:0;box-sizing:border-box}
:root{
  --navy:#0f172a; --slate:#475569; --muted:#64748b;
  --line:#e2e8f0; --bg:#ffffff; --soft:#f8fafc;
  --blue:#1d4ed8; --violet:#6d28d9; --red:#c8102e; --sky:#eff6ff;
}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--navy);background:var(--bg);line-height:1.85;-webkit-font-smoothing:antialiased}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
a{text-decoration:none;color:inherit}
.grad{background:linear-gradient(120deg,var(--blue),var(--violet))}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:19px;letter-spacing:-.02em}
.logo span{color:var(--blue)}
nav ul{display:flex;gap:28px;list-style:none;font-size:14px;font-weight:500}
nav a:hover{color:var(--blue)}
.btn{display:inline-block;padding:11px 22px;border-radius:8px;font-size:14px;font-weight:600;transition:.2s}
.btn-p{background:linear-gradient(120deg,var(--blue),var(--violet));color:#fff}
.btn-p:hover{opacity:.88;transform:translateY(-1px)}
.btn-o{border:1px solid var(--line);color:var(--navy)}
.btn-o:hover{border-color:var(--blue);color:var(--blue)}
@media(max-width:768px){nav ul{display:none}}

/* hero */
.hero{padding:88px 0 72px;background:
  radial-gradient(900px 380px at 78% -8%,rgba(109,40,217,.10),transparent 60%),
  radial-gradient(700px 320px at 12% 8%,rgba(29,78,216,.10),transparent 60%),var(--soft);
  border-bottom:1px solid var(--line)}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;color:var(--blue);
  background:#fff;border:1px solid var(--line);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}
h1{font-size:clamp(28px,4.6vw,46px);line-height:1.32;font-weight:800;letter-spacing:-.02em;margin-bottom:18px}
h1 em{font-style:normal;background:linear-gradient(120deg,var(--blue),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.h1cn{font-size:clamp(15px,2vw,18px);color:var(--slate);font-weight:500;margin-bottom:26px}
.lead{font-size:16px;color:var(--slate);max-width:660px;margin-bottom:32px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:46px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:660px;
  border-top:1px solid var(--line);padding-top:26px}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--navy);letter-spacing:-.02em}
.stat i{font-style:normal;font-size:12.5px;color:var(--muted)}
@media(max-width:600px){.stats{grid-template-columns:1fr;gap:12px}.hero{padding:56px 0 48px}}

/* section */
section{padding:78px 0}
.sec-soft{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kicker{font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--blue);text-transform:uppercase;margin-bottom:10px}
h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
h2.cn{font-size:clamp(15px,2vw,17px);font-weight:500;color:var(--slate);margin-bottom:14px}
.sub{color:var(--slate);max-width:660px;font-size:15px;margin-bottom:44px}

/* cards */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;transition:.22s}
.card:hover{border-color:transparent;box-shadow:0 14px 34px rgba(15,23,42,.09);transform:translateY(-3px)}
.ico{width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:16px;background:var(--sky)}
.card h3{font-size:16.5px;font-weight:700;margin-bottom:6px}
.card .cn3{font-size:13px;color:var(--blue);font-weight:600;margin-bottom:10px}
.card p{font-size:13.8px;color:var(--slate);line-height:1.75}
.card .stack{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-size:12px;color:var(--muted)}

/* reasons */
.reason{display:flex;gap:16px;align-items:flex-start}
.num{flex:0 0 34px;height:34px;border-radius:9px;background:linear-gradient(120deg,var(--blue),var(--violet));
  color:#fff;font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center}
.reason h4{font-size:15.5px;font-weight:700;margin-bottom:5px}
.reason p{font-size:13.8px;color:var(--slate)}

/* demo */
.demo{border-left:3px solid var(--blue);background:#fff;border-radius:0 12px 12px 0;padding:22px 24px;margin-bottom:14px}
.demo h4{font-size:15px;font-weight:700;margin-bottom:6px}
.demo p{font-size:13.5px;color:var(--slate)}
.demo .tag2{display:inline-block;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:6px;background:var(--sky);color:var(--blue);margin-right:8px}

/* flow */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
@media(max-width:820px){.flow{grid-template-columns:1fr;gap:22px}}
.step{position:relative;padding-right:26px}
.step:not(:last-child)::after{content:"";position:absolute;right:0;top:16px;width:1px;height:100%;background:var(--line)}
@media(max-width:820px){.step{padding-right:0}.step:not(:last-child)::after{display:none}}
.step .dot{width:34px;height:34px;border-radius:50%;border:2px solid var(--blue);color:var(--blue);
  font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;background:#fff}
.step h4{font-size:15px;font-weight:700;margin-bottom:5px}
.step .dur{font-size:12px;color:var(--red);font-weight:700;margin-bottom:6px}
.step p{font-size:13.2px;color:var(--slate);padding-right:12px}

/* about */
.about{display:grid;grid-template-columns:1fr 1.35fr;gap:44px;align-items:start}
@media(max-width:820px){.about{grid-template-columns:1fr;gap:26px}}
.badge{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;text-align:center}
.badge .av{width:78px;height:78px;border-radius:50%;margin:0 auto 14px;background:linear-gradient(120deg,var(--blue),var(--violet));
  color:#fff;font-size:26px;font-weight:800;display:flex;align-items:center;justify-content:center}
.badge b{display:block;font-size:17px;font-weight:800}
.badge i{font-style:normal;font-size:12.5px;color:var(--muted)}
.badge .n1{display:inline-block;margin-top:14px;font-size:11.5px;font-weight:700;color:#fff;background:var(--red);padding:4px 12px;border-radius:999px}
ul.pts{list-style:none}
ul.pts li{position:relative;padding-left:22px;font-size:14px;color:var(--slate);margin-bottom:11px}
ul.pts li::before{content:"";position:absolute;left:4px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--blue)}

/* faq */
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-size:15px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--blue);font-size:20px;font-weight:700;line-height:1}
details[open] summary::after{content:"−"}
details p{font-size:13.8px;color:var(--slate);margin-top:12px;max-width:780px}

/* contact */
.contact{background:linear-gradient(120deg,var(--blue),var(--violet));color:#fff;border-radius:18px;padding:52px;text-align:center}
.contact h2,.contact .sub{color:#fff}
.contact .sub{opacity:.85;margin:0 auto 30px}
.contact .btn-p{background:#fff;color:var(--blue)}
.contact .btn-o{border-color:rgba(255,255,255,.5);color:#fff}
.contact .btn-o:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.ctinfo{display:flex;justify-content:center;gap:34px;flex-wrap:wrap;margin-top:32px;font-size:13.5px;opacity:.9}

/* footer */
footer{background:var(--navy);color:#94a3b8;font-size:13px;padding:44px 0 30px}
footer .fl{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:26px}
footer b{color:#fff;font-size:15px}
footer a:hover{color:#fff}
.fnav{display:flex;gap:20px;flex-wrap:wrap;list-style:none}
.copy{border-top:1px solid rgba(148,163,184,.22);padding-top:18px;font-size:12px;color:#64748b}
.note{background:rgba(200,16,46,.10);border:1px dashed rgba(200,16,46,.4);border-radius:10px;
  padding:14px 18px;font-size:12.5px;color:#94a3b8;margin-top:20px;line-height:1.7}
.note b{color:#fca5a5}

/* ===== 文章 / 列表页（build.py 生成页共用） ===== */
.crumbs{font-size:12.5px;color:var(--muted);margin-bottom:26px}
.crumbs a:hover{color:var(--blue)}
.meta{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.chip{display:inline-block;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:6px;
  background:var(--sky);color:var(--blue)}
.chip.ghost{background:transparent;border:1px solid var(--line);color:var(--slate)}
.langsw-wrap{margin-left:auto}
.langsw{font-size:12px;font-weight:700;color:var(--red);border:1px solid var(--red);
  padding:3px 11px;border-radius:999px}
.langsw:hover{background:var(--red);color:#fff}

.post{max-width:780px;padding-top:52px;padding-bottom:64px}
.posthead{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:34px}
.posthead h1{font-size:clamp(24px,3.6vw,34px);line-height:1.4}
.tzh{font-size:15px;color:var(--blue);font-weight:600;margin-top:8px}
.lead2{font-size:15px;color:var(--slate);margin-top:14px}

.postbody{font-size:15.2px;line-height:1.95;color:#1e293b}
.postbody h2{font-size:22px;font-weight:800;margin:44px 0 14px;padding-left:13px;
  border-left:4px solid var(--blue);letter-spacing:-.01em}
.postbody h3{font-size:17.5px;font-weight:700;margin:32px 0 10px}
.postbody h4{font-size:15.5px;font-weight:700;margin:24px 0 8px;color:var(--slate)}
.postbody p{margin-bottom:16px}
.postbody ul,.postbody ol{margin:0 0 20px 22px}
.postbody li{margin-bottom:8px}
.postbody strong{font-weight:700;color:var(--navy)}
.postbody a{color:var(--blue);border-bottom:1px solid rgba(29,78,216,.35)}
.postbody a:hover{border-bottom-color:var(--blue)}
.postbody blockquote{margin:22px 0;padding:16px 20px;background:var(--soft);
  border-left:3px solid var(--violet);border-radius:0 8px 8px 0;color:var(--slate);font-size:14.2px}
.postbody pre{background:var(--navy);color:#e2e8f0;font-size:13px;line-height:1.7;
  padding:18px 20px;border-radius:10px;overflow-x:auto;margin:22px 0}
.postbody code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.postbody :not(pre)>code{background:var(--sky);color:var(--blue);padding:2px 7px;border-radius:5px;font-size:13px}
.postbody img{max-width:100%;border-radius:10px;margin:22px 0;border:1px solid var(--line)}
.postbody hr{margin:38px 0;border:none;border-top:1px solid var(--line)}

.postfoot{margin-top:52px}
.cta2{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:30px 32px;text-align:center}
.cta2 b{display:block;font-size:17px;font-weight:800;margin-bottom:8px}
.cta2 p{font-size:14px;color:var(--slate);margin-bottom:20px}
.cta2 .btn{margin:0 5px}
.byline{font-size:12.5px;color:var(--muted);margin-top:24px;text-align:right}

.postcard{display:block}
.postcard .meta{margin-bottom:10px}
.postcard h3{font-size:16px;font-weight:700;margin-bottom:6px}
.postcard .cn3{font-size:13px;color:var(--blue);font-weight:600;margin-bottom:8px}
.postcard p{font-size:13.6px;color:var(--slate);line-height:1.7}
.postcard .more{margin-top:14px;font-size:13px;font-weight:700;color:var(--blue)}
.postcard:hover .more{text-decoration:underline}


.tw{overflow-x:auto;margin:22px 0}
.postbody table{width:100%;border-collapse:collapse;font-size:14px}
.postbody th{background:var(--sky);color:var(--blue);font-weight:700;text-align:left;
  padding:11px 14px;border-bottom:2px solid var(--line)}
.postbody td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.postbody tbody tr:hover{background:var(--soft)}


.tw table{width:100%;border-collapse:collapse;font-size:14px}
.tw th{background:var(--sky);color:var(--blue);font-weight:700;text-align:left;
  padding:11px 14px;border-bottom:2px solid var(--line)}
.tw td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.tw tbody tr:hover{background:var(--soft)}

/* 对比表高亮列 */
.tw td.hl{background:rgba(29,78,216,.05);border-left:2px solid var(--blue)}