*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --green:#268a4e;--green-d:#1e7040;--green-l:#e8f5ee;
  --bg:#fafcfb;--white:#fff;--ink:#1c2830;--muted:#5c6b76;--line:#e4ebe7;
  --sans:'Segoe UI','Noto Sans SC','PingFang SC',sans-serif;
  --max:1180px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.75}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-d);text-decoration:none}
a:hover{text-decoration:underline}

.hdr{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}
.hdr-in{max-width:var(--max);margin:0 auto;padding:0 20px;height:58px;display:flex;align-items:center;gap:20px}
.hdr .logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1rem;color:var(--ink);text-decoration:none}
.hdr .logo img{border-radius:6px}
.hdr nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}
.hdr nav a{padding:7px 13px;font-size:.86rem;color:var(--muted);text-decoration:none;border-radius:4px;font-weight:500}
.hdr nav a:hover,.hdr nav a.on{color:var(--green-d);background:var(--green-l);text-decoration:none}
.hdr .dl-btn{padding:8px 20px;background:var(--green);color:#fff;border-radius:5px;font-weight:700;font-size:.86rem;text-decoration:none;white-space:nowrap}
.hdr .dl-btn:hover{background:var(--green-d);text-decoration:none;color:#fff}

.bread{max-width:var(--max);margin:0 auto;padding:12px 20px;font-size:.82rem;color:var(--muted)}
.bread a{color:var(--muted)}
.bread span{margin:0 6px}

.layout{max-width:var(--max);margin:0 auto;padding:0 20px 48px;display:grid;grid-template-columns:1fr 280px;gap:32px;align-items:start}
.main{min-width:0}
.side{position:sticky;top:74px}

.article{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:32px 36px;margin-bottom:24px}
.article h1{font-size:clamp(1.5rem,3vw,1.9rem);font-weight:700;line-height:1.3;margin-bottom:12px;color:var(--ink)}
.article .meta{font-size:.84rem;color:var(--muted);margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.article h2{font-size:1.2rem;font-weight:700;margin:32px 0 14px;color:var(--ink);padding-left:12px;border-left:4px solid var(--green)}
.article h3{font-size:1.02rem;font-weight:600;margin:20px 0 10px}
.article p,.article li{font-size:.94rem;color:var(--muted);margin-bottom:12px}
.article ul,.article ol{padding-left:22px;margin-bottom:16px}
.article img{border-radius:6px;border:1px solid var(--line);margin:16px 0;cursor:pointer}
.article code{font-size:.86rem;background:#f0f4f2;padding:2px 6px;border-radius:3px;color:var(--green-d)}

.side-box{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:20px;margin-bottom:16px}
.side-box h4{font-size:.88rem;font-weight:700;margin-bottom:12px;color:var(--ink)}
.side-box a{display:block;padding:6px 0;font-size:.84rem;color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line)}
.side-box a:last-child{border-bottom:none}
.side-box a:hover{color:var(--green-d)}
.side-dl{background:linear-gradient(135deg,var(--green),var(--green-d));color:#fff;border:none;text-align:center;padding:24px 20px}
.side-dl h4{color:#fff;margin-bottom:8px}
.side-dl p{font-size:.82rem;opacity:.9;margin-bottom:14px}
.side-dl a{display:inline-block;background:#fff;color:var(--green-d);padding:10px 24px;border-radius:5px;font-weight:700;font-size:.88rem;text-decoration:none}
.side-dl a:hover{filter:brightness(1.05);text-decoration:none}

.toc a{display:block;padding:5px 0 5px 12px;font-size:.84rem;color:var(--muted);text-decoration:none;border-left:2px solid transparent}
.toc a:hover,.toc a.on{color:var(--green-d);border-left-color:var(--green)}

table.data{width:100%;border-collapse:collapse;font-size:.88rem;margin:16px 0}
table.data th,table.data td{padding:11px 14px;border:1px solid var(--line);text-align:left}
table.data th{background:var(--green-l);color:var(--green-d);font-weight:600}
table.data tr:nth-child(even){background:#f8faf9}

.faq-item{border-bottom:1px solid var(--line);padding:16px 0}
.faq-item:last-child{border-bottom:none}
.faq-item h3{font-size:.95rem;font-weight:600;color:var(--ink);margin-bottom:6px}
.faq-item p{font-size:.88rem;color:var(--muted);margin:0}

.hero-banner{background:linear-gradient(135deg,var(--green-l) 0%,var(--white) 100%);border:1px solid var(--line);border-radius:8px;padding:36px;margin-bottom:24px;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.hero-banner h1{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:10px}
.hero-banner p{color:var(--muted);font-size:.95rem;margin-bottom:18px}
.hero-banner .cta{display:inline-block;background:var(--green);color:#fff;padding:11px 26px;border-radius:5px;font-weight:700;text-decoration:none;font-size:.92rem}
.hero-banner .cta:hover{background:var(--green-d);text-decoration:none;color:#fff}

.landing-mod{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:32px 36px;margin-bottom:24px}
.landing-mod h2{font-size:1.2rem;font-weight:700;margin:0 0 14px;color:var(--ink);padding-left:12px;border-left:4px solid var(--green)}
.landing-mod>p{font-size:.94rem;color:var(--muted);margin-bottom:20px}
.landing-mod img{border-radius:6px;border:1px solid var(--line);margin:16px 0;cursor:pointer}
.hot-q{display:flex;flex-direction:column;gap:0}
.hot-q details{border-bottom:1px solid var(--line);padding:14px 0}
.hot-q details:last-child{border-bottom:none}
.hot-q summary{font-weight:600;font-size:.94rem;color:var(--ink);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.hot-q summary::after{content:'+';color:var(--green);font-size:1.1rem}
.hot-q details[open] summary::after{content:'−'}
.hot-q details p{font-size:.88rem;color:var(--muted);margin:10px 0 0;padding-right:24px}
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.check-list{list-style:none;padding:0;margin:0}
.check-list li{padding:10px 0 10px 28px;position:relative;font-size:.9rem;color:var(--muted);border-bottom:1px solid var(--line)}
.check-list li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700}
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.scenario-card{border:1px solid var(--line);border-radius:6px;padding:18px;background:var(--bg)}
.scenario-card h4{font-size:.92rem;color:var(--ink);margin-bottom:6px}
.scenario-card p{font-size:.84rem;color:var(--muted);margin:0}
.note-wall{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.note-card{background:var(--green-l);border-radius:6px;padding:16px 18px;font-size:.86rem;color:var(--muted);line-height:1.6}
.note-card cite{display:block;margin-top:8px;font-size:.78rem;color:var(--green-d);font-style:normal}

.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:20px 0}
.dl-card{border:1px solid var(--line);border-radius:8px;padding:22px;text-align:center;text-decoration:none;color:inherit;transition:.2s}
.dl-card:hover{border-color:var(--green);background:var(--green-l);text-decoration:none}
.dl-card b{display:block;font-size:.95rem;margin:8px 0 4px;color:var(--ink)}
.dl-card span{font-size:.82rem;color:var(--muted)}

.foot{background:var(--white);border-top:1px solid var(--line);padding:32px 20px;margin-top:24px}
.foot-in{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;font-size:.84rem;color:var(--muted)}
.foot h5{font-size:.88rem;color:var(--ink);margin-bottom:10px}
.foot a{color:var(--muted);display:block;margin-bottom:5px;text-decoration:none}
.foot a:hover{color:var(--green-d)}
.foot .copy{grid-column:1/-1;text-align:center;padding-top:20px;margin-top:20px;border-top:1px solid var(--line);font-size:.8rem}

.modal{display:none;position:fixed;inset:0;z-index:500;background:rgba(0,0,0,.8);align-items:center;justify-content:center;padding:20px}
.modal.open{display:flex}
.modal img{max-width:95vw;max-height:90vh;border-radius:6px}
.modal-x{position:absolute;top:16px;right:20px;background:#fff;border:none;width:34px;height:34px;border-radius:4px;cursor:pointer;font-size:1.1rem}

@media(max-width:860px){
  .layout{grid-template-columns:1fr}
  .side{position:static}
  .hero-banner{grid-template-columns:1fr}
  .check-grid,.scenario-grid,.note-wall{grid-template-columns:1fr}
  .hdr nav{display:none}
  .foot-in{grid-template-columns:1fr}
  .article{padding:24px 20px}
}