:root{
  --accent:#0f4c81;
  --accent-2:#0c3a63;
  --accent-3:#082a47;
  --accent-soft:#eef3f8;
  --ink:#1c2733;
  --muted:#5b6570;
  --line:#dde3e8;
  --bg:#ffffff;
  --bg-soft:#f6f8fa;
  --warn:#fdf6ec;
  --warn-line:#e8c99a;
}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.2px}
nav.main{display:flex;gap:20px;flex-wrap:wrap}
.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:20px 0}
.gallery figure{margin:0;min-width:0}
.gallery img{width:100%;max-width:100%;aspect-ratio:4/3;object-fit:contain;background:#eef1f3;border-radius:6px;display:block}
.gallery figcaption{font-size:.85em;color:#5b6570;margin-top:8px;line-height:1.5}
*{box-sizing:border-box}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
header.site{background:var(--accent);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 6px rgba(0,0,0,.18);border-bottom:1px solid rgba(255,255,255,.18)}
header.site .bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
header.site a{color:#fff;text-decoration:none}
nav.main a:hover{opacity:1;text-decoration:underline}
.answer p{margin:0;font-size:16px;color:var(--ink)}
.answer strong{color:var(--accent-2)}
main{padding:34px 0 56px}
h2{font-size:25px;margin:28px 0 12px;font-weight:700;letter-spacing:-.3px;color:var(--ink);border-bottom:2px solid var(--line);padding-bottom:8px}
h3{font-size:18px;margin:24px 0 8px;font-weight:650}
p{margin:12px 0}
ul,ol{margin:12px 0;padding-left:24px}
li{margin:7px 0}
a{color:var(--accent)}
strong{color:inherit}
table{width:100%;border-collapse:collapse;table-layout:fixed;margin:18px 0;font-size:15px}
th,td{overflow-wrap:break-word;border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--accent-soft);font-weight:650;color:var(--accent-2)}
.note p{margin:6px 0}
.note strong{color:#8a5a00}
.faq h3{font-size:17px;margin:22px 0 6px;color:var(--accent-2)}
.cta h2{color:#fff;margin:0 0 8px;font-size:23px;border:none;padding:0}
.cta a.btn.alt{background:transparent;color:#fff;border:1px solid #fff}
.small{font-size:13px;color:var(--muted)}
footer.site{background:var(--bg-soft);border-top:1px solid var(--line);padding:34px 0 26px;font-size:14px;color:var(--muted)}
footer.site .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}
footer.site h4{font-size:14px;color:var(--ink);margin:0 0 10px;text-transform:uppercase;letter-spacing:.5px}
footer.site a{color:var(--muted);text-decoration:none}
footer.site a:hover{color:var(--accent)}
footer.site .legal{border-top:1px solid var(--line);margin-top:22px;padding-top:16px;font-size:12.5px}
nav.main a.cur{text-decoration:underline;font-weight:700;opacity:1}
.cta-block p,.cta-block strong{color:#e8f0f8}
.part-hero h1,.part-hero p,.part-hero strong{color:#fff}
.part-hero .lead{font-size:1.15em;max-width:820px;line-height:1.7;opacity:.95}
.keytake li{margin:6px 0}
table.spec{width:100%;border-collapse:collapse;table-layout:fixed;margin:18px 0;font-size:.95em}
table.spec td{padding:9px 12px;border:1px solid #dde3e8;vertical-align:top}
table.spec tr:nth-child(even) td{background:#f7f9fb}
.callout{border:1px solid #cfe0d9;background:#f0f8f4;border-left:4px solid #0e7c7b;padding:14px 18px;margin:16px 0;border-radius:4px;font-size:.95em}
.redflag{border:1px solid #f0d0c8;background:#fdf3f0;border-left:4px solid #c0392b;padding:14px 18px;margin:16px 0;border-radius:4px;font-size:.95em}
.cta-block p,.cta-block strong,.cta-block a{color:#fff}
.in_word h3{margin-top:24px}
.topic-clusters{margin:36px auto 0;border-top:1px solid var(--line);padding-top:20px}
.topic-clusters h2{font-size:24px;margin:0 0 6px;padding-bottom:8px;border-bottom:2px solid var(--line)}
.topic-clusters .tc-intro{color:var(--muted);font-size:15px;margin:0 0 16px}
.topic-clusters .cluster-group{margin:0 0 18px}
.topic-clusters .cluster-group h3{font-size:18px;font-weight:650;color:var(--accent-2);margin:0 0 8px}
.topic-clusters ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:8px}
.topic-clusters ul li{margin:0}
.topic-clusters ul a{display:block;padding:12px 16px;background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;color:var(--accent);font-weight:500;text-decoration:none}
.topic-clusters ul a:hover{border-color:var(--accent);background:var(--accent-soft);text-decoration:none}
.topic-clusters .tc-cta{margin-top:14px}
.topic-clusters .tc-cta a{color:#c2410c;font-weight:700;text-decoration:none}
.brand-mark{display:inline-flex;width:34px;height:34px;object-fit:contain;flex:0 0 auto;background:transparent;border-radius:0;box-shadow:none;padding:0;box-sizing:content-box}
.h2count{color:#0e7c7b;font-weight:600}
.hero{background:linear-gradient(165deg,var(--accent) 0%,var(--accent-2) 62%,var(--accent-3) 100%);color:#fff;padding:56px 0 40px;text-align:center}
.keytake{background:#eef3f8;border-left:4px solid #0f4c81;padding:16px 20px;margin:18px 0;border-radius:4px}
.cmp{margin:24px 0;font-size:14.5px}
.cmp th{background:var(--accent-soft);color:var(--accent-2);font-weight:700}
.cmp td{vertical-align:top}
.cmp tr:nth-child(even) td{background:#fafbfc}
.qa{margin:16px 0;padding:0}
.qa summary{cursor:pointer;font-weight:600;color:var(--accent-2);padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--bg-soft);list-style-position:outside;margin:8px 0;transition:background .15s}
.qa summary:hover{background:var(--accent-soft)}
.qa summary::-webkit-details-marker{color:var(--accent)}
.qa[open] summary{border-bottom-left-radius:0;border-bottom-right-radius:0}
.qa p{margin:10px 14px 14px;padding:0 4px;color:var(--ink);line-height:1.65}
.sub{font-size:1.05rem;line-height:1.65;max-width:820px;margin:14px auto 0;}
.cpk-note{background:#fdf3f0;border-left:4px solid #c0392b;padding:14px 18px;margin:16px 0;border-radius:4px;font-size:.95em}
pre.rfq,.rfq{white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere;background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-left:4px solid var(--accent,#0f4c81);border-radius:8px;padding:16px 18px;margin:16px 0;font-size:.9em;line-height:1.6;overflow-x:auto}
details.qa summary,summary{cursor:pointer;font-weight:650;color:var(--accent-2,#0c3a63);font-size:16.5px;padding:4px 0 6px 2px;line-height:1.5}
details.qa p{margin:10px 0 4px;color:var(--ink,#1c2733)}
.tc-links{list-style:none;padding:0;margin:10px 0;display:grid;grid-template-columns:1fr;gap:8px}
.tc-links a{display:block;padding:10px 14px;background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:8px;text-decoration:none}
.rel-list{list-style:none;padding:0;margin:12px 0}
.rel-list li{margin:6px 0}
.rel-list a{display:block;padding:10px 14px;background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:8px;text-decoration:none}
.phasea-related{list-style:none;padding:0;margin:12px 0}
.phasea-related li{margin:6px 0}
.phasea-related a{display:block;padding:10px 14px;background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:8px;text-decoration:none}
.tdk-related{list-style:none;padding:0;margin:12px 0}
.tdk-related li{margin:6px 0}
.tdk-related a{display:block;padding:10px 14px;background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:8px;text-decoration:none}
.emd-intro{background:var(--accent-soft,#eef3f8);border-left:4px solid var(--accent,#0f4c81);padding:16px 18px;margin:18px 0;border-radius:6px}
.emd-intro p{margin:8px 0}
.contact-card{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:10px;padding:18px 20px;margin:16px 0}
.faq-block{margin:14px 0}
.faq-item{margin:12px 0;padding:12px 0;border-bottom:1px solid var(--line,#dde3e8)}
.breadcrumb{font-size:.9em;color:var(--muted,#5b6570);padding:10px 0}
.sep{color:var(--muted,#5b6570);margin:0 6px}
.matrix{width:100%;border-collapse:collapse;margin:16px 0;font-size:.94em}
.matrix th,.matrix td{border:1px solid var(--line,#dde3e8);padding:9px 12px;text-align:left;vertical-align:top}
.matrix th{background:var(--accent-soft,#eef3f8);font-weight:650}
.faq-group{margin:16px 0}
.faq-h3{font-size:17px;margin:18px 0 6px;color:var(--accent-2,#0c3a63)}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0}
.lbl{font-weight:650;color:var(--accent-2,#0c3a63)}
.num{font-weight:700;color:var(--accent-2,#0c3a63)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0}
.card{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:10px;padding:16px 18px;margin:0}
.card h3,.card h4{margin:0 0 8px}
.mapwrap{position:relative;width:100%;margin:18px 0;padding-top:56.25%;border:1px solid var(--line,#dde3e8);border-radius:10px;overflow:hidden}
.mapwrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.map-wrap{position:relative;width:100%;margin:18px 0;padding-top:56.25%;border:1px solid var(--line,#dde3e8);border-radius:10px;overflow:hidden}
.map-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
iframe.mapframe,.mapframe{width:100%;min-height:320px;border:1px solid var(--line,#dde3e8);border-radius:10px;display:block;margin:18px 0}
.map-frame{width:100%;margin:18px 0;border:1px solid var(--line,#dde3e8);border-radius:10px;overflow:hidden}
.map-frame iframe{width:100%;min-height:320px;border:0;display:block}
.toc{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:10px;padding:16px 20px;margin:18px 0}
.toc ul{margin:8px 0 0;padding-left:20px}
.toc li{margin:5px 0}
.foot{color:var(--muted,#5b6570);font-size:.9em;margin:16px 0}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:18px 0}
.contactcard{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:10px;padding:18px 20px;margin:16px 0}
table.tbl{width:100%;border-collapse:collapse;margin:18px 0;font-size:.95em}
table.tbl th,table.tbl td{border:1px solid var(--line,#dde3e8);padding:9px 12px;text-align:left;vertical-align:top}
table.tbl th{background:var(--accent-soft,#eef3f8);font-weight:650}
.decision{background:var(--bg-soft,#f6f8fa);border-left:4px solid var(--accent,#0f4c81);border-radius:6px;padding:14px 18px;margin:16px 0}
.groupintro{color:var(--muted,#5b6570);font-size:.95em;margin:10px 0 14px}
.quote{border-left:4px solid var(--accent,#0f4c81);padding:10px 0 10px 16px;margin:16px 0;font-style:italic;color:var(--ink,#1c2733)}
.who{font-size:1.02rem;line-height:1.7;color:var(--ink,#1c2733);margin:14px 0}
.hero-grid{display:grid;grid-template-columns:1fr;gap:22px;align-items:center;margin:22px 0}
.hero-card{background:#fff;border:1px solid var(--line,#dde3e8);border-radius:12px;padding:18px 20px;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.hero-left{min-width:0}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin:16px 0}
.da-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0}
.da-card{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:10px;padding:16px 18px}
.da-card h3{margin:0 0 8px}
.kpi{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:20px 0}
.kpi > div{background:var(--bg-soft,#f6f8fa);border:1px solid var(--line,#dde3e8);border-radius:8px;padding:14px 12px;text-align:center}
.related-resources{margin:28px 0 0;padding-top:18px;border-top:1px solid var(--line,#dde3e8)}
.related-resources ul{margin:8px 0 0;padding-left:20px}
.in_pic{width:100%;height:auto;border-radius:8px;margin:16px 0}
.related-paths{margin:36px 0 10px}
.rel-cta{margin-top:14px}
.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:20px 0}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
nav.main a{font-size:14px;opacity:.92;font-weight:500}
.hero h1{font-size:36px;line-height:1.2;margin:0 auto 14px;font-weight:800;letter-spacing:-.4px}
.hero.sub{font-size:17px;max-width:820px;opacity:.95;margin:0 auto}
.answer{background:var(--accent-soft);border:1px solid #c9d7e4;border-left:4px solid var(--accent);border-radius:8px;padding:16px 18px;margin:26px auto 8px;max-width:820px;text-align:left}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:30px 0 0}
.stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:16px 10px}
.stat.n{font-size:24px;font-weight:800;letter-spacing:-.4px}
.stat.l{font-size:12.5px;opacity:.85;margin-top:3px}
tr:nth-child(even) td{background:#fafbfc}
.note{background:var(--warn);border:1px solid var(--warn-line);border-left:4px solid #c98a2d;border-radius:8px;padding:14px 16px;margin:20px 0;font-size:15px}
.cta{background:var(--accent);color:#fff;border-radius:12px;padding:30px 30px;margin-top:40px;text-align:center}
.cta p{color:#e4edf5;margin:6px 0 16px}
.cta a.btn{display:inline-block;background:#fff;color:var(--accent);font-weight:700;padding:12px 24px;border-radius:6px;text-decoration:none;margin:4px 5px}
footer.site.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}
footer.site.legal{border-top:1px solid var(--line);margin-top:22px;padding-top:16px;font-size:12.5px}
.cta-block{background:var(--accent);color:#fff;border-radius:12px;padding:30px 30px;margin:40px 0 0}
.cta-block a{color:#fff;font-weight:600;text-decoration:underline}
.part-hero{background:#3c6ada;color:#fff;padding:40px 0;margin-bottom:0}
.part-hero.lead{font-size:1.15em;max-width:820px;line-height:1.7;opacity:.95}
.keytake ul{margin:8px 0 8px 20px;list-style:disc}
table.spec th{background:#3c6ada;color:#fff;text-align:left;padding:10px 12px;font-weight:600}
.in_word ul{list-style:disc;padding-left:24px}
.in_word ul li{margin:6px 0}
@media(max-width:640px){.hero h1{font-size:27px}body{font-size:15px}nav.main{gap:14px}.stats{grid-template-columns:repeat(2,1fr)}}
a[href^="https://www.facebook.com/"]{overflow-wrap:anywhere;word-break:break-all}

nav.main a.cur{text-decoration:underline;font-weight:700;opacity:1}
dl.glossary{margin:22px 0;padding:0;border:1px solid #dde3e8;border-radius:6px;overflow:hidden}
dl.glossary dt{background:#eef3f8;color:#0c3a63;font-weight:700;padding:10px 16px;border-bottom:1px solid #dde3e8}
dl.glossary dd{margin:0;padding:12px 16px;border-bottom:1px solid #dde3e8;line-height:1.55}
dl.glossary dd:last-child{border-bottom:0}
.body-prose{background:var(--bg-soft);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:18px 20px;margin:28px 0}
.body-prose p{margin:10px 0}
.body-prose p:first-child{margin-top:0}

.top10-trust-block{margin:34px 0;padding:22px 24px;background:#f6f9fb;border:1px solid #dde6ec;border-radius:10px}
.top10-trust-block h2{font-size:1.25em;margin:0 0 8px}
.top10-intro{color:#4a5a68;margin:0 0 14px}
.top10-list{margin:0;padding-left:22px}
.top10-list li{margin:9px 0}
.top10-cta{margin:16px 0 0;padding-top:12px;border-top:1px solid #dde6ec}
.top10-cta a{font-weight:600}
@media(min-width:768px){.topic-clusters ul{grid-template-columns:1fr 1fr}}
@media(min-width:768px){.tc-links{grid-template-columns:1fr 1fr}}
@media(min-width:860px){.hero-grid{grid-template-columns:1.05fr .95fr}}
@media (max-width:768px){
  nav.main a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;margin:2px 0}
  .qa summary,details.qa summary{min-height:44px;display:flex;align-items:center;padding:10px 14px;box-sizing:border-box}
  .cta a.btn,.cta-block a{display:inline-flex;align-items:center;justify-content:center;min-height:44px}
  footer.site a{display:inline-block;padding:5px 0}
}
@media(max-width:640px){.hero h1{font-size:27px}body{font-size:15px}nav.main{gap:14px}.stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.gallery{grid-template-columns:minmax(0,1fr)}}
@media(max-width:640px){.hero h1{font-size:27px}body{font-size:15px}nav.main{gap:14px}}
@media(max-width:640px){.top10-trust-block{padding:16px 15px}}


/* ===== contrast guard 2026-11-06: dark surfaces must carry light text ===== */
.hero h2,.hero h3,.hero h4,
.part-hero h2,.part-hero h3,.part-hero h4,
.cta-block h2,.cta-block h3,.cta-block h4,
.cta h2,.cta h3,.cta h4,
header.site h2,header.site h3,header.site h4,
.stat h2,.stat h3{color:#fff;border-color:rgba(255,255,255,.35)}
/* 兜底：深色块内普通段落/加粗也必须是浅色（覆盖顺序在 .faq p 等规则之后，靠顺序取胜） */
.cta-block p,.cta-block strong,.cta-block li{color:#fff}
.cta p,.cta li{color:#fff}
/* hero 内的浅色卡片（da-card）必须恢复深色正文（部分域名误设 .da-card strong 白字） */
.hero .da-card,.hero .da-card strong,.hero .da-card h3{color:var(--ink,#1c2733)}
/* .sub 仅允许在 hero 内使用白字（部分页面存在 hero 外的重复段落） */
.hero .sub{color:#fff}