/* Offline-first static content site · independent geo.changtl.cn */
:root{--ink:#152b41;--muted:#526478;--navy:#0d2946;--teal:#137c86;--aqua:#d9eff0;--paper:#f7f8f5;--line:#dce3e4;--white:#fff;--gold:#cd8d42;--max:1160px;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.3;letter-spacing:-.025em}h1{font-size:clamp(2.6rem,5.1vw,4.65rem);font-weight:730}h2{font-size:clamp(1.8rem,2.8vw,2.6rem)}h3{font-size:1.15rem}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}a:hover{color:var(--teal)}.wrap{max-width:var(--max);margin-inline:auto;padding-inline:28px}.site-header{background:rgba(255,255,255,.95);border-bottom:1px solid #e3e8e8;position:sticky;top:0;z-index:25;backdrop-filter:blur(12px)}.head-inner{height:83px;display:flex;align-items:center;justify-content:space-between;gap:22px}.logo{display:flex;align-items:center;gap:12px;line-height:1.25;font-weight:800;font-size:1.06rem;white-space:nowrap}.mark{width:40px;height:40px;border-radius:13px;background:var(--navy);display:grid;place-items:center;color:#bce6dc;font-size:23px}.logo small{display:block;color:#627080;font-weight:500;font-size:11px;letter-spacing:.06em;margin-top:4px}.nav{display:flex;align-items:center;gap:30px}.nav a{color:#3c4f61;font-size:14px}.nav a[aria-current=page]{font-weight:800;color:var(--teal)}.head-cta{font-size:13px;border:1px solid #adc6c9;padding:9px 15px;border-radius:999px;white-space:nowrap}.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 85% 22%,rgba(25,137,150,.22),transparent 32%),linear-gradient(118deg,#102c49 0%,#143756 62%,#164d62 100%);color:white}.hero .wrap{min-height:510px;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:70px;padding-block:88px 94px}.eyebrow{font-size:12px;font-weight:850;letter-spacing:.21em;color:var(--teal);text-transform:uppercase}.hero .eyebrow{color:#93d8dc}.hero p.lead{font-size:17px;max-width:550px;color:#d2e1ec;line-height:1.9}.hero h1 strong{font-weight:750;color:#a7e3d9}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:27px}.btn{display:inline-flex;justify-content:center;align-items:center;border-radius:6px;padding:12px 23px;font-size:14px;font-weight:780;background:#d8efeb;color:#143749;border:1px solid transparent}.btn:hover{background:#fff;color:#0d2946}.btn-outline{background:transparent;color:white;border-color:#89a7bb}.btn-outline:hover{color:#143749}.art-panel{height:350px;position:relative;border:1px solid rgba(196,231,231,.26);border-radius:22px;transform:rotate(-2deg);background:linear-gradient(135deg,rgba(239,255,255,.11),rgba(255,255,255,.02));box-shadow:0 32px 70px rgba(4,21,38,.32);overflow:hidden}.art-panel:before,.art-panel:after{content:"";position:absolute;border:1px solid #9ecaca77;border-radius:50%;width:360px;height:360px;top:22px;left:50px}.art-panel:after{width:235px;height:235px;top:85px;left:112px}.ringcenter{position:absolute;z-index:2;top:132px;left:180px;height:84px;width:84px;display:grid;place-items:center;background:#cce9e5;border-radius:50%;color:#16445b;font-weight:900;font-size:15px;letter-spacing:.12em}.orbit{position:absolute;background:#143f56;color:#e6f6f5;border:1px solid #4f97a1;border-radius:10px;padding:8px 12px;font-size:12px;z-index:3}.o1{top:50px;left:38px}.o2{top:66px;right:25px}.o3{bottom:64px;left:32px}.o4{bottom:39px;right:36px}.art-caption{position:absolute;left:25px;bottom:18px;font-size:10px;letter-spacing:.14em;color:#c0d9de}.strip{background:#fff;border-bottom:1px solid var(--line)}.strip .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:79px;font-size:14px;color:#516b78}.strip strong{color:var(--teal);white-space:nowrap}.section{padding-block:88px}.section-kicker{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:36px}.section-kicker .intro{max-width:520px;color:var(--muted);font-size:15px}.feature-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:35px}.feature-large{min-height:410px;background:#dcebe9;padding:37px;border-radius:13px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.feature-large:after{content:"";position:absolute;width:290px;height:290px;right:-80px;bottom:-130px;border:48px solid #bbd9d3;border-radius:50%}.feature-large h3{font-size:29px;max-width:370px;position:relative;z-index:1}.feature-large p{color:#47626d;max-width:390px;position:relative;z-index:1}.linkarrow{font-weight:800;font-size:14px;position:relative;z-index:1}.feature-small{display:flex;flex-direction:column;gap:18px}.feature-small a{background:#fff;border:1px solid var(--line);padding:22px 25px;border-radius:12px;flex:1;transition:transform .2s}.feature-small a:hover,.article-card:hover{transform:translateY(-3px)}.num{color:var(--teal);font-size:11px;letter-spacing:.12em;font-weight:800}.feature-small h3{font-size:20px;margin:5px 0 6px}.feature-small p{font-size:13px;color:var(--muted);margin:0}.articles-block{background:#eff3f2;border-top:1px solid #e0e6e4;border-bottom:1px solid #dfe6e3}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.article-card{display:flex;flex-direction:column;justify-content:space-between;min-height:255px;padding:25px;border:1px solid #dbe4e3;background:#fff;border-radius:10px;transition:transform .2s}.article-card h3{font-size:20px;line-height:1.5;margin:13px 0}.article-card p{font-size:13px;color:var(--muted)}.meta{display:flex;gap:8px;align-items:center;color:#6e8190;font-size:12px}.quote-section{padding:74px 0}.statement{border-left:4px solid #88b9b9;padding:6px 0 6px 27px;max-width:960px;font-size:clamp(1.25rem,2.15vw,1.75rem);font-weight:650;line-height:1.7}.statement small{display:block;color:var(--muted);font-size:13px;font-weight:400;margin-top:18px}.cta-split{background:var(--navy);color:white;border-radius:13px;display:flex;align-items:center;justify-content:space-between;gap:40px;padding:40px 48px}.cta-split p{color:#cadbe8;margin:0}.footer{background:#10263c;color:#b6c8d5;padding:55px 0 26px}.footer-grid{display:flex;justify-content:space-between;gap:30px;border-bottom:1px solid #385268;padding-bottom:32px}.footer a{color:#cfe4e8}.foot-links{display:flex;gap:24px;flex-wrap:wrap;font-size:13px}.fine{font-size:12px;color:#9ab0c1;margin-top:24px}.page-hero{background:linear-gradient(120deg,#0f2d47,#1a5260);color:white;padding:82px 0 76px}.page-hero h1{font-size:clamp(2.3rem,4vw,3.8rem);max-width:900px}.page-hero p{max-width:820px;color:#d4e5ea;font-size:16px}.page-main{display:grid;grid-template-columns:minmax(0,790px) 240px;gap:70px;align-items:start;padding-block:64px 100px}.prose{max-width:790px}.prose h2{font-size:26px;margin:48px 0 19px}.prose h3{font-size:20px;margin:31px 0 14px}.prose p,.prose li{color:#344d60;font-size:16px}.prose ul,.prose ol{padding-left:25px}.prose li{padding-bottom:9px}.prose a{color:#066b81;text-decoration:underline;text-underline-offset:4px}.prose .summary{padding:27px 30px;background:#e5efed;border-left:3px solid var(--teal);font-weight:590;color:#284958;border-radius:0 9px 9px 0}.article-toc{position:sticky;top:120px;border-top:3px solid var(--teal);padding-top:18px;font-size:13px}.article-toc h3{font-size:15px}.article-toc a{display:block;padding:9px 0;color:#566e7d;border-bottom:1px solid var(--line)}.article-toc a:hover{color:var(--teal)}.callout{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:19px 0;margin:32px 0;font-size:14px;color:#556d7b}.article-meta{display:flex;gap:20px;flex-wrap:wrap;color:#bbd3dd;font-size:13px;margin-top:20px}.breadcrumbs{color:#9bd3d9;font-size:13px;margin-bottom:27px}.breadcrumbs a{text-decoration:underline;text-underline-offset:4px}.references{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px;margin-top:42px}.references h2{margin:0 0 14px;font-size:20px}.references li{font-size:14px}.card-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card-list a{padding:29px;background:#fff;border:1px solid var(--line);border-radius:10px}.card-list h3{margin:9px 0;font-size:20px}.card-list p{color:var(--muted);font-size:14px}.filter-note{font-size:13px;color:#677a87;margin-top:22px}.mobile-menu{display:none}@media(max-width:900px){.nav{display:none}.hero .wrap{grid-template-columns:1fr;gap:35px}.art-panel{height:265px;max-width:550px}.ringcenter{top:93px}.hero .wrap{padding-block:58px}.feature-layout,.page-main{grid-template-columns:1fr}.article-toc{position:static}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-large{min-height:330px}.footer-grid{flex-direction:column}.mobile-menu{display:block;border:0;background:none;color:var(--ink);font-size:14px;font-weight:700}.head-inner{position:relative}.nav.mobile-open{display:flex;position:absolute;top:79px;left:0;right:0;background:#fff;padding:23px 28px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:18px}.head-cta{display:none}}@media(max-width:620px){.wrap{padding-inline:20px}.hero h1{font-size:2.45rem}.section{padding-block:56px}.section-kicker{display:block}.strip .wrap{display:block;padding-block:18px}.article-grid,.card-list{grid-template-columns:1fr}.art-panel{height:235px}.ringcenter{left:43%;top:77px}.o3{bottom:50px}.cta-split{flex-direction:column;align-items:flex-start;padding:28px}.page-hero{padding:60px 0}.page-main{padding-block:37px 65px}.article-toc{display:none}.footer{padding-top:42px}}