:root{--ink:#20323d;--blue:#132f40;--accent:#80b6cf;--paper:#f6f7f5;--line:#dce3e4;--muted:#6e808a}*{box-sizing:border-box}html{scroll-behavior:auto;scroll-padding-top:28px}body{margin:0;color:var(--ink);background:#fff;font:16px/1.85 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:#39728e}a:focus-visible,summary:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3,p,figure,blockquote{margin:0}.wrap{width:min(1120px,calc(100% - 64px));margin:auto}.sitehead{background:var(--paper);border-bottom:1px solid var(--line)}.head-row{display:flex;gap:24px;align-items:center;min-height:86px}.brand{display:flex;gap:10px;align-items:center;white-space:nowrap;font-weight:650;line-height:1.5}.brand img{width:36px;height:36px;border-radius:5px;object-fit:cover}.brand small{display:block;font-size:11px;color:#79929e;font-weight:400}.qh-language-switch{font-size:12px;white-space:nowrap}.story-hero{padding:26px 0 46px;background:var(--paper);border-bottom:1px solid var(--line)}.breadcrumb{font-size:12px;color:#8599a3;margin-bottom:45px}.hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:60px;align-items:center}.eyebrow{display:block;font-size:12px;letter-spacing:1.8px;color:#769bad;font-weight:600;margin-bottom:19px}h1{font-size:58px;line-height:1.3;letter-spacing:-1px}h1 small{font-size:24px;font-weight:500;color:#65808e;letter-spacing:0}h1>span{display:block;font-size:28px;letter-spacing:0;line-height:1.6;margin-top:15px}.identity{margin:22px 0 17px;font-size:14px;color:#456b7d}.hero-intro{font-size:17px;color:#5d7481;margin-bottom:18px}.hero-note{font-size:15px;color:#83939c;margin-bottom:25px;max-width:610px}.textlink{display:inline-block;border-bottom:1px solid #acc6d2;padding-bottom:3px;color:#3d6a7f;font-size:14px}.hero-photo img{height:430px;aspect-ratio:4/5;object-fit:cover;max-height:430px;width:100%;display:block;border-radius:6px}.hero-photo figcaption{font-size:11px;color:#8a9ba4;margin-top:9px}.routes{margin-top:42px;border-top:1px solid #cedbdf;display:grid;grid-template-columns:1fr 1fr;gap:40px;padding-top:25px}.routes>div>span{font-size:11px;letter-spacing:1px;color:#88a3af;display:block;margin-bottom:8px}.routes p{font-size:13px;color:#627f8d;line-height:1.9}.reading-layout{display:grid;grid-template-columns:190px 1fr;gap:72px;align-items:start;padding:58px 0 0}.contents{position:sticky;top:28px;padding-right:20px}.contents h2{font-size:15px;font-weight:600;letter-spacing:1px;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:13px}.contents nav{display:flex;flex-direction:column}.contents a{display:flex;gap:12px;font-size:13px;padding:8px 0;color:#718895}.contents a>span{font-size:10px;color:#a0b3bd;min-width:18px}.contents a:hover{color:#244e65}.contents>p{margin-top:28px;font-size:11px;color:#9aabb3}.mobile-contents{display:none}.preview-note{font-size:12px;color:#8b9da5;background:var(--paper);padding:13px 18px;margin-bottom:36px;border-radius:4px}.chapter{display:grid;grid-template-columns:110px 1fr;gap:36px;position:relative;padding-bottom:68px;scroll-margin-top:25px}.chapter:before{content:"";position:absolute;left:129px;top:12px;bottom:0;width:1px;background:#d5e1e6}.chapter:after{content:"";position:absolute;top:11px;left:125px;width:9px;height:9px;border:2px solid #fff;border-radius:50%;background:#7cabc1;box-shadow:0 0 0 1px #b9d0db}.chapter:last-child:before{bottom:68px}.time-label>span{display:block;font-size:10px;color:#91a8b4;letter-spacing:2px;margin-bottom:11px}.time-label b{display:block;font-size:22px;line-height:1.5;color:#467084;font-weight:600}.chapter-body{min-width:0}.chapter h2{font-size:26px;line-height:1.55;letter-spacing:-.5px;margin-bottom:24px}.chapter-body>p{font-size:16px;line-height:1.95;color:#6c7e88;margin-bottom:21px}.chapter-body figure{margin-top:26px;margin-bottom:28px}.chapter-body figure img{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;border-radius:5px}.chapter-body figcaption{font-size:11px;color:#92a3ab;margin-top:10px}.photo-reserve{background:#f8f9f8;border:1px dashed #d4dfe2;border-radius:4px;padding:22px;margin:25px 0}.photo-reserve>span{display:block;font-size:10px;letter-spacing:1px;color:#94aab4;margin-bottom:6px}.photo-reserve p{font-size:13px;color:#748e9a}.photo-reserve small{display:block;font-size:11px;color:#a0afb5;margin-top:5px}.takeaway{border-left:2px solid #98bbcc;padding:3px 0 3px 18px;margin-top:25px}.takeaway>span{font-size:10px;color:#8aa4b0;letter-spacing:1px;display:block;margin-bottom:9px}.takeaway p{font-size:14px;line-height:1.85;color:#476a7d}.manuscript{margin-top:20px;border-top:1px solid #e6edef;padding-top:10px;color:#91a4ae;font-size:11px}.manuscript summary{cursor:pointer;width:fit-content}.manuscript p{padding-top:8px;font-size:12px}.evolution{display:flex;flex-wrap:wrap;gap:7px 12px;font-size:13px;color:#436a7f;line-height:2;background:#f0f5f7;border-radius:4px;padding:16px 20px;margin:22px 0}.evolution i{font-style:normal;color:#91b4c5}.technical-note{font-size:12px!important;color:#8ca3af!important}.dual-role{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:26px 0}.dual-role>div{border-top:1px solid #acc4d0;padding-top:17px}.dual-role span{display:block;font-size:12px;color:#96aab4;margin-bottom:7px}.dual-role b{font-size:15px;color:#466d80;font-weight:500}.principles{border-top:1px solid #d2dfe5;border-bottom:1px solid #d2dfe5;padding:25px 0;margin:28px 0;color:#355f75;font-size:22px;line-height:1.9;font-weight:600}.execution{font-size:14px!important;color:#6d8692!important}.execution b{font-size:16px;color:#375f75}.rule-entry{display:grid;grid-template-columns:1fr 25px;position:relative;border-bottom:1px solid #dbe5e9;padding:17px 0;gap:3px}.rule-entry b{font-size:15px;font-weight:600;color:#436c80}.rule-entry span{font-size:12px;grid-column:1;color:#8499a4}.rule-entry i{grid-column:2;grid-row:1/3;font-style:normal;align-self:center;color:#83a5b7}.rule-entry:hover{background:#f6f9fa}.facts{display:flex;gap:55px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:25px 0;padding:22px 0}.facts b{font-size:35px;color:#426a80;line-height:1.3}.facts b span{font-size:15px;padding-left:5px}.facts small{display:block;font-size:12px;color:#8a9da7;margin-top:6px}.ending{background:var(--blue);padding:65px 0;color:white}.ending h2{font-size:32px;margin-bottom:22px}.ending>.wrap{max-width:860px}.ending p{max-width:760px;color:#abc3d0;font-size:16px}.ending-principle{font-size:19px!important;color:#d9eaf1!important;font-weight:600;margin-top:25px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}.button{border:1px solid #7d9cab;color:#d3e4ed;padding:12px 20px;border-radius:4px;font-size:14px}.button.primary{background:#e9f4f9;border-color:#e9f4f9;color:#173c50;font-weight:600}.button:hover{background:#d1e7f2;color:#173c50}footer{background:var(--paper);padding:25px 0;font-size:12px;color:#8298a4}footer>.wrap{display:flex;justify-content:space-between;gap:20px}@media(max-width:1050px){.reading-layout{gap:35px;grid-template-columns:165px 1fr}.chapter{grid-template-columns:86px 1fr;gap:25px}.chapter:before{left:98px}.chapter:after{left:94px}.time-label b{font-size:19px}.hero-grid{gap:35px}h1{font-size:48px}h1>span{font-size:25px}}@media(max-width:700px){.wrap{width:calc(100% - 36px)}.head-row{min-height:72px;gap:12px}.brand{font-size:14px}.brand small{font-size:10px}.qh-language-switch{font-size:12px}.story-hero{padding-top:21px;padding-bottom:30px}.breadcrumb{font-size:11px;margin-bottom:30px}.hero-grid{grid-template-columns:1fr;gap:27px}.eyebrow{font-size:10px;letter-spacing:1.4px;margin-bottom:16px}h1{font-size:40px}h1 small{font-size:20px}h1>span{font-size:23px;line-height:1.5;margin-top:12px}.identity{font-size:12px;margin:17px 0}.hero-intro{font-size:15px}.hero-note{font-size:14px;margin-bottom:21px}.hero-photo img{height:auto;aspect-ratio:16/10;max-height:none}.hero-photo figcaption{font-size:10px}.routes{grid-template-columns:1fr;gap:18px;margin-top:25px;padding-top:20px}.routes p{font-size:12px}.reading-layout{display:block;padding-top:27px}.contents{display:none}.mobile-contents{display:block;background:var(--paper);border:1px solid var(--line);border-radius:5px;margin-bottom:22px;font-size:13px}.mobile-contents summary{cursor:pointer;padding:13px 17px;color:#466e82}.mobile-contents nav{display:grid;grid-template-columns:1fr 1fr;padding:0 17px 17px;gap:8px 12px}.mobile-contents a{font-size:12px;color:#708895;padding:4px 0}.mobile-contents a span{color:#a0b3bd;font-size:10px;margin-right:8px}.preview-note{font-size:11px;padding:13px 15px;margin-bottom:28px}.chapter{display:block;padding:0 0 44px 18px;margin-left:4px;border-left:1px solid #d5e1e6}.chapter:before{display:none}.chapter:after{left:-5px;top:8px}.time-label{margin-bottom:15px}.time-label>span{display:inline;font-size:10px;margin-right:10px}.time-label b{display:inline;font-size:18px}.chapter h2{font-size:23px;margin-bottom:20px;line-height:1.55}.chapter-body>p{font-size:15px;line-height:1.95;margin-bottom:19px}.photo-reserve{padding:18px;margin:22px 0}.photo-reserve p{font-size:12px}.photo-reserve small{font-size:10px}.takeaway p{font-size:13px}.takeaway{padding-left:14px;margin-top:22px}.dual-role{gap:16px}.dual-role b{font-size:13px}.principles{font-size:20px;padding:22px 0}.evolution{padding:14px;font-size:12px;gap:4px 8px}.facts{gap:30px}.facts b{font-size:31px}.rule-entry{padding:15px 0}.rule-entry span{font-size:11px}.ending{padding:43px 0}.ending h2{font-size:26px}.ending p{font-size:15px}.ending-principle{font-size:18px!important}.actions{gap:10px;margin-top:26px}.button{font-size:13px;padding:11px 15px}footer>.wrap{flex-direction:column;gap:8px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.chapter-body>h3{font-size:20px;line-height:1.65;color:#3b647a;margin:34px 0 19px}.chapter-body>.emphasis{color:#3b647a;font-weight:600}.ending .wrap>h3{font-size:22px;margin:30px 0 20px;color:#d4e7ef}.ending .wrap>p{margin-bottom:20px;line-height:1.95}.ending .wrap>h3+p{margin-top:14px}@media(max-width:700px){.chapter-body>h3{font-size:18px;margin-top:28px}.ending .wrap>h3{font-size:20px}}

/* One shared chapter directory: open on desktop, collapsible on phones. */
.chapter-directory>summary{font-size:13px;font-weight:600;color:#426b80;cursor:pointer;padding:0 0 17px;border-bottom:1px solid var(--line);margin-bottom:13px;list-style:none}.chapter-directory>summary::-webkit-details-marker{display:none}.chapter-directory>summary:after{content:"−";float:right;color:#83a5b6}.chapter-directory:not([open])>summary:after{content:"+"}.chapter-directory nav{display:flex;flex-direction:column}@media(max-width:700px){.contents{display:block;position:static;padding:0;margin:0 0 28px;border:1px solid var(--line);border-radius:5px;background:var(--paper)}.chapter-directory>summary{padding:14px 17px;margin:0;border:0;font-size:13px}.chapter-directory nav{display:grid;grid-template-columns:1fr 1fr;padding:0 17px 17px;gap:8px 12px}.contents a{font-size:12px;padding:4px 0;gap:7px}.contents a>span{font-size:10px}.chapter-directory:not([open]) nav{display:none}}

/* Personal-history conclusion: readable reflection, compact onward links. */
.ending-reflection{background:#f5f7f6;border-top:1px solid #dce5e7;padding:78px 0 72px;color:#20323d}.reflection-grid{display:grid;grid-template-columns:230px minmax(0,1fr);gap:68px;align-items:start}.reflection-heading{position:sticky;top:35px}.reflection-heading .eyebrow{margin-bottom:21px;font-size:12px;color:#7c9dab;letter-spacing:2px}.reflection-heading h2{font-size:34px;line-height:1.5;letter-spacing:-.5px;max-width:235px}.reflection-prose{max-width:790px;min-width:0}.reflection-part h3{font-size:22px;line-height:1.6;color:#355c71;font-weight:600;margin:0 0 26px}.reflection-part p{color:#687e89;font-size:16px;line-height:2;margin-bottom:25px}.reflection-part p:last-child{margin-bottom:0}.reflection-part+.reflection-part{border-top:1px solid #d0dfe5;margin-top:44px;padding-top:36px}.reflection-quote{position:relative;border-left:3px solid #88b5c9;padding:19px 25px;background:#edf3f5;color:#355b70;font-size:20px;line-height:1.85;font-weight:500;margin:30px 0 0;border-radius:0 5px 5px 0}.story-coda{background:#132f40;color:white;padding:36px 0}.story-coda>.wrap{display:flex;justify-content:space-between;align-items:center;gap:40px}.story-coda .ending-principle{font-size:19px!important;color:#d4e7f0!important;line-height:1.9;margin:0!important;font-weight:600}.story-coda .actions{margin:0;gap:12px}.story-coda .button{white-space:nowrap}.story-coda+.contentinfo{border:0}@media(max-width:1050px){.reflection-grid{grid-template-columns:185px minmax(0,1fr);gap:40px}.reflection-heading h2{font-size:29px}}@media(max-width:700px){.ending-reflection{padding:42px 0 44px}.reflection-grid{display:block}.reflection-heading{position:static;padding-bottom:25px;margin-bottom:28px;border-bottom:1px solid #d6e1e5}.reflection-heading .eyebrow{font-size:10px;margin-bottom:12px}.reflection-heading h2{font-size:27px;max-width:none;line-height:1.6}.reflection-part h3{font-size:20px;margin-bottom:20px}.reflection-part p{font-size:15px;line-height:1.95;margin-bottom:21px}.reflection-part+.reflection-part{margin-top:31px;padding-top:27px}.reflection-quote{font-size:18px;padding:16px 18px;margin-top:25px;line-height:1.9}.story-coda{padding:30px 0 32px}.story-coda>.wrap{display:block}.story-coda .ending-principle{font-size:18px!important}.story-coda .actions{margin-top:23px;gap:10px}.story-coda .button{font-size:13px;padding:11px 15px}}