:root{--navy:#0b2d4b;--navy-2:#173f61;--gold:#ba8a3d;--gold-soft:#e7d5b4;--paper:#fbf6ec;--paper-2:#fffdf8;--ink:#262626;--muted:#6d675f;--line:#ded3c1;--shadow:0 20px 50px rgba(28,39,50,.12);--reader-size:18px;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Songti SC","STSong","SimSun","Noto Serif CJK SC",serif;line-height:1.9;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}a:hover{color:var(--gold)}img{max-width:100%;display:block}.reading-progress{position:fixed;z-index:1000;left:0;right:0;top:0;height:3px;background:transparent}.reading-progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--gold),#e1b96a)}
.site-header{width:min(1180px,calc(100% - 36px));margin:0 auto;padding:28px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}.site-header.compact{padding:20px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font:700 17px/1.2 system-ui,"Microsoft YaHei",sans-serif;color:var(--navy)}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--gold);border-radius:50%;color:var(--gold)}.site-header nav{display:flex;gap:22px;font:600 14px/1.2 system-ui,"Microsoft YaHei",sans-serif;color:#465769}
.book-hero{width:min(1120px,calc(100% - 36px));margin:32px auto 80px;display:grid;grid-template-columns:minmax(280px,420px) 1fr;gap:clamp(42px,7vw,100px);align-items:center}.cover-frame{padding:14px;background:#fff;border:1px solid #e0d6c6;box-shadow:var(--shadow);transform:rotate(-.5deg)}.hero-copy .eyebrow,.eyebrow{margin:0 0 12px;font:700 13px/1.4 system-ui,"Microsoft YaHei",sans-serif;letter-spacing:.14em;color:var(--gold);text-transform:uppercase}.hero-copy h1{margin:.1em 0 .1em;font-size:clamp(46px,7vw,82px);line-height:1.12;color:var(--navy);letter-spacing:.02em}.subtitle{font-size:clamp(20px,2.5vw,30px);color:var(--navy-2);margin:16px 0 8px}.author{color:var(--gold);font-weight:700}.lead{font-size:18px;color:#47423c;max-width:720px}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:28px 0 16px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border:1px solid var(--navy);border-radius:999px;font:700 14px/1 system-ui,"Microsoft YaHei",sans-serif;color:var(--navy)}.button.primary{background:var(--navy);color:#fff}.text-link,.resume{font:700 14px/1.4 system-ui,"Microsoft YaHei",sans-serif;color:var(--gold);text-decoration:underline;text-underline-offset:4px}.resume{display:none;margin-top:12px}.resume.ready{display:block}.book-facts{display:flex;flex-wrap:wrap;gap:26px;margin:30px 0 0}.book-facts div{min-width:72px}.book-facts dt{font:700 24px/1.1 Georgia,serif;color:var(--navy)}.book-facts dd{margin:5px 0 0;font:500 12px/1.2 system-ui,"Microsoft YaHei",sans-serif;color:var(--muted)}
.intro-block,.reading-note,.contents,.back-cover{width:min(1120px,calc(100% - 36px));margin:0 auto 88px}.intro-block{display:grid;grid-template-columns:1fr 1fr;gap:60px;padding:60px;border-top:1px solid var(--gold-soft);border-bottom:1px solid var(--gold-soft)}.intro-block h2,.reading-note h2,.contents>h2,.back-copy h2{margin:0;color:var(--navy);font-size:clamp(30px,4vw,48px);line-height:1.35}.intro-copy{font-size:18px}.reading-note{padding:48px;border-radius:28px;background:var(--navy);color:#f7f0e5;box-shadow:var(--shadow)}.reading-note h2{color:white}.note-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:32px}.note-grid div{padding:22px;border:1px solid rgba(255,255,255,.18);border-radius:18px;background:rgba(255,255,255,.05)}.note-grid strong,.note-grid span{display:block}.note-grid strong{color:#e4bd79;font:700 15px/1.5 system-ui,"Microsoft YaHei",sans-serif}.note-grid span{margin-top:8px;color:#e7e5e0}.contents>h2{max-width:760px}.toc-part{margin-top:48px}.toc-part>h2{font:700 18px/1.4 system-ui,"Microsoft YaHei",sans-serif;color:var(--gold);border-bottom:1px solid var(--line);padding-bottom:12px}.toc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.toc-card{min-height:210px;padding:24px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.5);display:flex;flex-direction:column;transition:.2s ease}.toc-card:hover{transform:translateY(-3px);border-color:var(--gold);box-shadow:0 12px 28px rgba(50,41,28,.08)}.toc-card span{font:700 12px/1.3 system-ui,"Microsoft YaHei",sans-serif;letter-spacing:.08em;color:var(--gold)}.toc-card h3{font-size:21px;line-height:1.5;color:var(--navy)}.toc-card em{margin-top:auto;font:700 13px/1.3 system-ui,"Microsoft YaHei",sans-serif;color:var(--gold);font-style:normal}.back-cover{min-height:600px;border-radius:28px;overflow:hidden;display:grid;place-items:center;background:linear-gradient(90deg,rgba(251,246,236,.96),rgba(251,246,236,.72)),url('cover-back-background.png') center/cover no-repeat;box-shadow:var(--shadow)}.back-copy{width:min(680px,calc(100% - 48px));padding:48px}.back-copy p{font-size:18px}.back-copy strong{display:block;margin-top:26px;color:var(--gold);font-size:20px}.site-footer{padding:30px max(18px,calc((100% - 1120px)/2));display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);font:500 13px/1.5 system-ui,"Microsoft YaHei",sans-serif;color:var(--muted)}
.reader-tools{position:fixed;right:18px;bottom:22px;z-index:30;display:flex;gap:6px;padding:7px;border-radius:999px;background:rgba(255,253,248,.94);border:1px solid var(--line);box-shadow:0 12px 30px rgba(0,0,0,.12);backdrop-filter:blur(10px)}.reader-tools button{width:42px;height:38px;border:0;border-radius:999px;background:transparent;color:var(--navy);font-weight:700;cursor:pointer}.reader-tools button:hover{background:#eee3d1}.reader-shell{width:min(1120px,calc(100% - 36px));margin:56px auto 90px;display:grid;grid-template-columns:minmax(0,760px) 220px;gap:80px;align-items:start}.book-article{font-size:var(--reader-size)}.article-home{font:700 13px/1.4 system-ui,"Microsoft YaHei",sans-serif;color:var(--gold)}.article-kicker{margin:48px 0 10px;font:700 13px/1.4 system-ui,"Microsoft YaHei",sans-serif;letter-spacing:.12em;color:var(--gold)}.book-article>h1{margin:0;color:var(--navy);font-size:clamp(36px,5vw,60px);line-height:1.35}.article-rule{height:30px;margin:20px 0 38px;display:flex;align-items:center}.article-rule:before,.article-rule:after{content:"";height:1px;background:var(--gold-soft);flex:1}.article-rule span{width:10px;height:10px;margin:0 14px;background:var(--gold);transform:rotate(45deg)}.article-body p{margin:0 0 1.15em;text-align:justify}.article-body h2{margin:2.5em 0 .9em;color:var(--navy);font-size:1.55em;line-height:1.45}.article-body h3{color:var(--navy)}.article-body blockquote{margin:1.8em 0;padding:1em 1.3em;border-left:3px solid var(--gold);background:rgba(255,255,255,.55);font-size:1.12em;color:var(--navy)}.article-body a{color:#315e82;text-decoration:underline;text-decoration-color:#b7c8d6;text-underline-offset:3px;overflow-wrap:anywhere}.note-ref{font-size:.85em;text-decoration:none!important;color:var(--gold)!important}.notes-rule{margin:4em 0 2em;border:0;border-top:1px solid var(--line)}.notes-title{font-size:1.35em!important}.endnote{font-size:.82em;color:var(--muted);text-align:left!important;padding-left:1.9em;text-indent:-1.9em}.signature{text-align:right!important;color:var(--navy)}.chapter-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:70px;padding-top:26px;border-top:1px solid var(--line);font:700 14px/1.5 system-ui,"Microsoft YaHei",sans-serif;color:var(--navy)}.chapter-nav .next{text-align:right}.reader-aside{position:sticky;top:30px;padding:20px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.5);font:500 13px/1.5 system-ui,"Microsoft YaHei",sans-serif}.reader-aside img{margin-bottom:16px}.reader-aside strong,.reader-aside span,.reader-aside a{display:block;margin-top:8px}.reader-aside a{color:var(--gold)}.article-footer{width:min(760px,calc(100% - 36px));margin:0 auto 50px;padding-top:24px;border-top:1px solid var(--line);font:500 12px/1.7 system-ui,"Microsoft YaHei",sans-serif;color:var(--muted)}
body.dark{--paper:#15222d;--paper-2:#182733;--ink:#e8e4dd;--muted:#b7b0a4;--line:#334654;--navy:#f4e2bb;--navy-2:#d9c596;--gold:#e4b96f;--gold-soft:#5b513d;color-scheme:dark}.dark .reader-tools,.dark .reader-aside,.dark .toc-card,.dark .article-body blockquote{background:rgba(21,34,45,.92)}.dark .lead{color:#d0cbc2}.dark .reading-note{background:#0d1821}
@media(max-width:850px){.book-hero{grid-template-columns:1fr}.cover-frame{max-width:440px;margin:auto}.hero-copy{text-align:center}.hero-copy .lead{margin-left:auto;margin-right:auto}.actions,.book-facts{justify-content:center}.intro-block{grid-template-columns:1fr;padding:38px 24px;gap:22px}.note-grid,.toc-grid{grid-template-columns:1fr}.reader-shell{grid-template-columns:1fr;gap:30px}.reader-aside{position:static;display:grid;grid-template-columns:86px 1fr;column-gap:16px}.reader-aside img{grid-row:1/7}.site-header nav{gap:12px}.site-header nav a:nth-child(3){display:none}}
@media(max-width:560px){.site-header{width:calc(100% - 24px);padding:16px 0}.brand span:last-child{display:none}.book-hero,.intro-block,.reading-note,.contents,.back-cover,.reader-shell{width:calc(100% - 24px)}.book-hero{margin-top:18px}.hero-copy h1{font-size:46px}.reading-note{padding:30px 20px}.toc-card{min-height:170px}.site-footer{display:block}.site-footer span{display:block;margin-top:8px}.reader-shell{margin-top:26px}.article-kicker{margin-top:30px}.book-article>h1{font-size:34px}.article-body p{text-align:left}.reader-tools{right:10px;bottom:12px}.back-copy{padding:28px 10px}}
@media print{.site-header,.reader-tools,.reading-progress,.reader-aside,.chapter-nav,.article-footer{display:none!important}.reader-shell{display:block;width:auto;margin:0}.book-article{font-size:11pt}.article-body a{color:inherit;text-decoration:none}.book-article>h1{font-size:25pt}body{background:#fff}}