/* 观史第二版的过渡视觉：保留新版信息结构，回到史鉴的档案气质。 */
:root{--ink:#172d35;--muted:#687a7e;--green:#247564;--navy:#173c48;--gold:#c39c58;--paper:#f5f5ef;--line:#dce4df;--soft:#e5ece5;--shadow:0 14px 40px #183c4510}
body{background:var(--paper);color:var(--ink);font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.global-nav{position:static;height:auto;max-width:1240px;margin:0 auto;padding:25px 30px;gap:20px;background:transparent;color:var(--ink)}
.global-brand{gap:12px;color:var(--ink);font-size:22px;letter-spacing:.1em}.brand-mark{width:41px;height:41px;border:0;border-radius:12px;background:var(--navy);color:#fff;font:24px Georgia,"Songti SC",serif}
.global-links{gap:24px;color:var(--ink);font-size:13px}.global-links a:hover,.footer-links a:hover{color:var(--green)}.nav-login{padding:10px 17px;border:1px solid var(--line);border-radius:10px;color:var(--ink);background:#fff}.nav-login:hover{border-color:var(--green)}
.menu-button{border-color:#bfcfc8;background:#fff;color:var(--ink)}.mobile-menu{top:76px;background:var(--navy);border-top:0;padding:12px 20px 20px}.mobile-menu a{border-color:#ffffff22;color:#eef6f3}
.tile-dark,.tile-light,.tile-pearl{padding:78px 30px}.tile-dark{background:var(--navy);color:#edf6f4}.tile-light{background:var(--paper)}.tile-pearl{background:#fff}
.hero{min-height:0;max-width:1240px;margin:0 auto;grid-template-columns:1.18fr 1fr;gap:60px;padding-top:65px;padding-bottom:80px;background:transparent;color:var(--ink)}
.hero-copy{max-width:680px}.eyebrow{font-size:11px;letter-spacing:.15em;font-weight:750;color:var(--green)}.eyebrow.blue{color:var(--green)}.eyebrow.blue-light{color:#d3b071}
h1,h2,h3{letter-spacing:-.03em}h1{font:600 clamp(38px,4.2vw,64px)/1.18 Georgia,"Songti SC","SimSun",serif;letter-spacing:-.035em;margin:18px 0 24px;color:var(--ink)}h1 span{color:var(--green)}h2{font:600 clamp(32px,4vw,52px)/1.2 Georgia,"Songti SC","SimSun",serif;color:var(--ink)}h3{font-size:20px}
.hero-lede{max-width:540px;color:var(--muted);font-size:16px;line-height:1.9}.hero-actions{margin-top:30px}.button{border-radius:10px;padding:10px 17px;font-size:14px;font-weight:650}.button.primary{background:var(--green);color:#fff}.button.primary:hover{background:#1c6454}.button.dark-outline{border:1px solid var(--line);color:var(--ink);background:#fff}.button.dark-outline:hover{border-color:var(--green)}.button.light-outline{border:1px solid var(--line);color:var(--green);background:#fff}.button.light-outline:hover{border-color:var(--green)}.hero-status{color:var(--muted);font-size:12px;margin-top:18px}.status-dot.online{background:#3b896b}.status-dot.warn{background:#b78339}
.hero-visual{max-width:540px;padding:32px;background:var(--soft);border:1px solid #d8e1d9;border-radius:22px;box-shadow:var(--shadow)}.visual-label{color:#718273;font-size:11px;font-weight:750;letter-spacing:.18em}.visual-label b{color:var(--navy)}.visual-frame{aspect-ratio:4/5;border:1px solid #dfdfd2;background:#fffdf7}.visual-frame:before,.visual-frame:after{border-color:#d6ded8}.visual-frame:after{border-color:#b9c9c0}.visual-rule{background:#9eb5aa}.visual-seal{border-color:var(--navy);color:var(--navy);font-family:Georgia,"Songti SC",serif}.visual-caption{color:var(--ink);font-size:14px}.visual-caption span{color:var(--green)}.visual-note{color:#718273}
.method-grid{gap:16px;margin-top:50px}.method-card{min-height:260px;padding:25px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}.method-card:hover{border-color:#a8c9bb}.method-number{font:28px Georgia,"Songti SC",serif;color:#a6b9ad}.method-card h3{font-size:18px;margin:20px 0 10px}.method-card p{font-size:13px;color:var(--muted);line-height:1.8}.text-link{color:var(--green);font-size:13px}
.statement-section{max-width:none;grid-template-columns:minmax(0,1fr) minmax(0,680px);background:var(--navy);color:#edf6f4}.statement-copy,.statement-list{max-width:1240px}.statement-copy h2{color:#fff}.statement-list{border-top-color:#ffffff2d}.statement-row{border-bottom-color:#ffffff2d}.statement-row span{color:#d3b071}.statement-row p{font-size:18px;color:#edf6f4}
.library-heading{max-width:1240px}.source-grid{gap:16px;margin-top:40px}.source-card{min-height:220px;padding:20px;border:1px solid var(--line);border-radius:12px;background:#ffffffb0}.source-card:hover{border-color:#a8c9bb}.source-card .source-type{color:var(--green)}.source-card h3{font-size:17px;margin:12px 0 8px}.source-card p{font-size:13px;color:var(--muted);line-height:1.8}.source-meta{color:var(--muted)}.source-empty{border-color:#cbd8cf;background:#fafcf9}
.team-layout{max-width:1240px}.team-panel{border-color:var(--line)}.team-live{color:#428c68}.team-metric strong{color:var(--navy)}.team-footnote{color:var(--muted)}.legacy-band{max-width:1240px;padding:45px 30px;background:#fff}.legacy-band strong{font-size:20px}.site-footer{max-width:1240px;padding:35px 30px 50px;background:var(--paper);border-top:1px solid var(--line);color:var(--muted)}.site-footer strong{color:var(--ink)}
@media(max-width:833px){.global-nav{padding:18px 20px}.mobile-menu{top:70px}.tile-dark,.tile-light,.tile-pearl{padding:55px 20px}.hero{padding-top:35px;padding-bottom:55px}.hero-visual{padding:22px;border-radius:16px}.method-grid{margin-top:35px}.legacy-band{padding:35px 20px}}