/* 索格斯 SOGES 全站共享样式 — index / about / insights 共用 */
:root{--navy:#152a4e;--navy-deep:#0f2040;--navy-2:#1d3a66;--gold:#c9a24b;--gold-soft:#e3c478;--ink:#1f2a37;--muted:#5b6b7f;--bg:#f6f8fb;--card:#fff;--line:#e3e9f1;--maxw:1140px;--radius:14px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;color:var(--ink);background:var(--bg);line-height:1.74;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3{color:var(--navy);line-height:1.34}
.eyebrow{color:var(--gold);font-weight:700;letter-spacing:.14em;font-size:13px;display:inline-block;margin-bottom:10px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer}
.btn-gold{background:var(--gold);color:#1c1402}
.btn-gold:hover{background:var(--gold-soft);transform:translateY(-2px)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{border-color:var(--gold-soft);color:#fff}
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--navy);font-size:18px}
.brand .logo{width:40px;height:40px}
.brand small{display:block;font-weight:600;font-size:11px;color:var(--muted)}
nav.links{display:flex;gap:22px}
nav.links a{font-size:14.5px;color:var(--muted);font-weight:600}
nav.links a:hover,nav.links a.active{color:var(--navy)}

/* HERO */
.hero{background:radial-gradient(1000px 520px at 88% -10%,#24467d 0%,transparent 60%),linear-gradient(160deg,var(--navy-deep),var(--navy));color:#eaf0f8;padding:60px 0 66px}
.hero h1{color:#fff;font-size:clamp(26px,3.6vw,44px);font-weight:800;margin:12px 0 14px;line-height:1.25}
.hero p.lead{color:#c7d4e6;font-size:clamp(15px,1.6vw,18px);max-width:680px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.hero .cta{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.defbox{background:rgba(255,255,255,.07);border:1px solid rgba(227,196,120,.3);border-radius:14px;padding:18px 20px;margin-top:24px}
.defbox .q{color:var(--gold-soft);font-weight:700;font-size:13.5px}
.defbox .a{color:#eaf0f8;font-size:14.5px;margin-top:6px}
.hero .visual{border-radius:18px;overflow:hidden;border:1px solid rgba(227,196,120,.25);background:rgba(255,255,255,.04);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center}
.hero .visual img{width:100%;height:100%;object-fit:cover}
.hero .visual svg{width:62%}

/* SECTIONS */
section.sec{padding:62px 0}
.sec-head{max-width:760px;margin:0 auto 38px;text-align:center}
.sec-head h2{font-size:clamp(22px,2.8vw,32px);font-weight:800;margin:8px 0 10px}
.sec-head p{color:var(--muted);font-size:15.5px}

/* GRIDS & CARDS */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:1000px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 8px 22px rgba(21,42,78,.05);height:100%}
.card h3{font-size:17px;margin-bottom:7px}
.card p{color:var(--muted);font-size:14.5px}
.card .more{display:inline-block;margin-top:10px;color:var(--navy-2);font-weight:700;font-size:13.5px}
.pillar{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 8px 22px rgba(21,42,78,.05);height:100%;display:flex;flex-direction:column}
.pillar h3{font-size:20px;margin-bottom:8px}
.pillar>p{color:var(--muted);font-size:14.5px;margin-bottom:14px}
.pillar .subtopics{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:16px}
.pillar .subtopics li{display:flex;align-items:center;gap:9px;color:var(--ink);font-size:14.5px;font-weight:600;padding:11px 14px;border:1px solid var(--line);border-radius:10px}
.pillar .subtopics li::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--gold);flex:none}
.pillar .more{margin-top:auto;color:var(--navy-2);font-weight:700;font-size:14px}
.insight-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:980px;margin:0 auto}
.insight{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:18px 20px;box-shadow:0 6px 18px rgba(21,42,78,.04);display:flex;flex-direction:column}
.insight h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.insight p{color:var(--muted);font-size:14px;flex:1}
.insight .more{margin-top:12px;color:var(--navy-2);font-weight:700;font-size:13.5px}
.insight-link{text-align:center;margin-top:26px}
.insight-link a{color:var(--navy-2);font-weight:700;font-size:15px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:20px}
.step .snum{font-size:12.5px;font-weight:800;color:var(--gold-soft);letter-spacing:.08em}
.step h3{color:#fff;font-size:17px;margin:8px 0 8px}
.step p{color:#c7d4e6;font-size:14px}

/* FLAG / DIFF / SVC */
.flag{background:linear-gradient(160deg,var(--navy),var(--navy-deep));color:#eaf0f8;border-radius:22px;padding:44px 40px;box-shadow:0 22px 55px rgba(15,32,64,.18);max-width:920px;margin:0 auto}
.flag h2{color:#fff;font-size:clamp(21px,2.6vw,30px);margin:6px 0 10px}
.flag p{color:#c7d4e6;max-width:680px}
.diff{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 22px rgba(21,42,78,.05)}
.diff h3{font-size:18px;margin-bottom:8px}
.diff p{color:var(--muted);font-size:14.5px}
.svc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:0 6px 18px rgba(21,42,78,.04)}
.svc h3{font-size:15.5px;margin-bottom:6px}
.svc p{color:var(--muted);font-size:13.5px}
.svc .num{display:inline-flex;width:24px;height:24px;border-radius:50%;background:var(--navy);color:var(--gold);align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-bottom:8px}

/* FAQ */
.faq{background:linear-gradient(160deg,#fff,#f3f7fc)}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-bottom:12px}
.faq-item h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.faq-item p{color:var(--muted);font-size:14.5px}

/* CTA BAND */
.cta-band{background:linear-gradient(160deg,var(--navy-deep),var(--navy));color:#eaf0f8;text-align:center;padding:50px 0}
.cta-band h2{color:#fff;font-size:clamp(21px,2.6vw,30px)}
.cta-band p{color:#c7d4e6;margin:10px 0 22px}
.cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* CONTACT BOX / QR */
.contact-box{max-width:680px;margin:18px auto 0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 24px;text-align:center;color:var(--ink);font-size:15px}
.contact-box b{color:var(--navy)}
.qr-row{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.qr-item{background:#fff;border-radius:16px;padding:16px 16px 14px;text-align:center;width:184px;box-shadow:0 14px 32px rgba(15,32,64,.22)}
.qr-item img{width:150px;height:150px;object-fit:contain;border-radius:10px;display:block;margin:0 auto;background:#f3f7fc}
.qr-item .cap{margin-top:11px;color:var(--navy);font-weight:800;font-size:15px}
.qr-item .sub{color:var(--muted);font-size:12.5px;margin-top:3px}

/* FOOTER */
footer{background:var(--navy-deep);color:#9fb2c9;text-align:center;padding:26px 0;font-size:13px}
footer b{color:#fff}
footer .bei{margin-top:8px;font-size:12px}
footer .bei a{color:#9fb2c9}

/* ============ 文章页 / 合集页 ============ */
.article{max-width:820px;margin:0 auto;padding:40px 0 10px}
.article .cat{color:var(--gold);font-weight:700;letter-spacing:.12em;font-size:13px}
.article h1{font-size:clamp(24px,3.4vw,36px);font-weight:800;margin:10px 0 14px;line-height:1.28}
.article .dek{color:var(--muted);font-size:17px;margin-bottom:18px}
.article hr{border:none;border-top:1px solid var(--line);margin:22px 0}
.prose p{color:var(--ink);font-size:16px;margin-bottom:16px}
.prose h2{font-size:23px;font-weight:800;margin:34px 0 14px;padding-left:13px;border-left:4px solid var(--gold)}
.prose h3{font-size:19px;font-weight:800;margin:26px 0 10px}
.prose ul{margin:0 0 18px 22px}
.prose ul li{color:var(--ink);font-size:16px;margin-bottom:8px}
.prose strong{color:var(--navy);font-weight:800}
.prose em{font-style:normal;color:var(--navy-2);font-weight:700}
.prose blockquote{background:#f3f7fc;border-left:4px solid var(--gold);border-radius:0 10px 10px 0;padding:14px 18px;color:var(--navy-2);font-size:15.5px;margin:0 0 18px;font-weight:600}
.sources{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin:30px 0 16px}
.sources .lbl{font-weight:800;color:var(--navy);font-size:14px;margin-bottom:8px}
.sources ul{margin:0 0 0 20px}
.sources li{color:var(--muted);font-size:14px;margin-bottom:6px}
.disclaimer{color:var(--muted);font-size:13px;line-height:1.7;border-top:1px dashed var(--line);padding-top:14px;margin-top:6px}
.article-cta{background:linear-gradient(160deg,var(--navy),var(--navy-deep));border-radius:18px;padding:32px 28px;text-align:center;margin:34px 0 10px}
.article-cta h3{color:#fff;font-size:21px;margin-bottom:6px}
.article-cta p{color:#c7d4e6;font-size:14.5px;margin-bottom:18px}
.article-cta .cta{margin:0}
.back-link{text-align:center;margin:26px 0 8px}
.back-link a{color:var(--navy-2);font-weight:700;font-size:14.5px}

/* ============ 合集页 / insights/index.html ============ */
.collection{max-width:1000px;margin:0 auto;padding:46px 0 10px}
.collection .hero-col{text-align:center;margin-bottom:14px}
.collection .hero-col .eyebrow{margin-bottom:8px}
.collection .hero-col h1{font-size:clamp(26px,3.4vw,38px);font-weight:800;margin:6px 0 12px}
.collection .hero-col p{color:var(--muted);font-size:16px;max-width:680px;margin:0 auto}
.cat-head{display:flex;align-items:baseline;gap:14px;margin:40px 0 18px;border-bottom:2px solid var(--line);padding-bottom:10px}
.cat-head .tag{color:var(--gold);font-weight:800;letter-spacing:.1em;font-size:13px}
.cat-head h2{font-size:23px}
.cat-head .n{color:var(--muted);font-size:13px;margin-left:auto}
.col-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.col-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:14px;padding:20px 22px;box-shadow:0 8px 22px rgba(21,42,78,.05);display:flex;flex-direction:column;transition:.2s}
.col-card:hover{transform:translateY(-3px);border-color:var(--gold);box-shadow:0 14px 30px rgba(21,42,78,.1)}
.col-card .ctag{color:var(--gold);font-weight:700;font-size:12px;letter-spacing:.1em}
.col-card h3{font-size:17px;color:var(--navy);margin:8px 0 8px;line-height:1.4}
.col-card p{color:var(--muted);font-size:14px;flex:1}
.col-card .more{margin-top:14px;color:var(--navy-2);font-weight:700;font-size:13.5px}

/* ============ 响应式 ============ */
@media(max-width:920px){
  .hero-grid,.steps{grid-template-columns:1fr}
  .grid-3,.grid-2,.grid-4,.insight-grid,.col-grid{grid-template-columns:1fr}
  nav.links{display:none}
  .hero .visual{order:-1;max-width:420px}
}
@media(max-width:860px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
}