:root{--paper:#f7f6f2;--paper-deep:#edf0f1;--surface:rgba(252,252,250,0.84);--ink:#293238;--muted:#68747c;--line:#d9e0e3;--brand:#607d8b;--brand-deep:#405d6b;--brand-soft:#e5ecef;--warm:#b47a56;--shadow:0 20px 55px rgba(45,66,77,0.09);--radius-lg:26px;--radius-md:18px;--content:1120px;--reading:760px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--ink);background:radial-gradient(circle at 12% 4%,rgba(184,204,214,0.38),transparent 25rem),radial-gradient(circle at 92% 28%,rgba(226,211,187,0.28),transparent 28rem),var(--paper);font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}body::before{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(rgba(96,125,139,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(96,125,139,0.025) 1px,transparent 1px);background-size:32px 32px;content:"";pointer-events:none}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid rgba(96,125,139,0.35);outline-offset:4px;border-radius:4px}.skip-link{position:fixed;top:12px;left:12px;z-index:100;padding:8px 14px;border-radius:9px;color:#fff;background:var(--brand-deep);transform:translateY(-160%);transition:transform 0.2s ease}.skip-link:focus{transform:translateY(0)}.site-header{position:sticky;top:0;z-index:30;border-bottom:1px solid rgba(217,224,227,0.82);background:rgba(247,246,242,0.88);backdrop-filter:blur(16px)}.nav-wrap,.container{width:min(calc(100% - 40px),var(--content));margin-inline:auto}.nav-wrap{position:relative;display:flex;min-height:72px;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:11px;font-size:1.25rem;font-weight:700;letter-spacing:0.12em}.brand-mark{display:grid;width:35px;height:35px;place-items:center;border:1px solid rgba(96,125,139,0.25);border-radius:50% 45% 52% 46%;color:var(--brand-deep);background:var(--brand-soft);font-family:Georgia,serif;font-size:1rem;font-style:italic}.site-nav{display:flex;align-items:center;gap:8px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.94rem}.site-nav a{padding:7px 13px;border-radius:999px;color:var(--muted);transition:color 0.2s ease,background 0.2s ease}.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--brand-deep);background:var(--brand-soft)}.nav-toggle{display:none;width:42px;height:42px;padding:10px;border:0;border-radius:12px;color:var(--ink);background:transparent;cursor:pointer}.nav-toggle span{display:block;width:21px;height:1.5px;margin:5px auto;background:currentColor;transition:transform 0.2s ease,opacity 0.2s ease}.hero{position:relative;display:grid;min-height:560px;align-items:center;padding:82px 0 72px;overflow:hidden}.hero::after{position:absolute;right:max(5vw,calc((100vw - var(--content)) / 2));bottom:35px;width:220px;height:220px;border:1px solid rgba(96,125,139,0.13);border-radius:50%;box-shadow:0 0 0 36px rgba(96,125,139,0.035),0 0 0 72px rgba(96,125,139,0.025);content:""}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,0.6fr);align-items:center;gap:72px}.eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0 0 16px;color:var(--brand);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.8rem;font-weight:650;letter-spacing:0.18em;text-transform:uppercase}.eyebrow::before{width:26px;height:1px;background:currentColor;content:""}.hero h1,.page-hero h1{margin:0;font-weight:700;letter-spacing:0.05em;line-height:1.22}.hero h1{max-width:680px;font-size:clamp(3rem,8vw,6.6rem)}.hero h1 span{display:block;margin-top:10px;color:var(--brand);font-size:clamp(1.1rem,2.5vw,1.5rem);font-weight:400;letter-spacing:0.18em}.hero-lead{max-width:610px;margin:26px 0 32px;color:#586871;font-size:1.08rem}.button-row{display:flex;flex-wrap:wrap;gap:12px}.button{display:inline-flex;min-height:46px;align-items:center;justify-content:center;gap:9px;padding:10px 20px;border:1px solid var(--brand-deep);border-radius:999px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.92rem;transition:transform 0.2s ease,box-shadow 0.2s ease,background 0.2s ease}.button:hover{transform:translateY(-2px)}.button-primary{color:#fff;background:var(--brand-deep);box-shadow:0 10px 24px rgba(64,93,107,0.16)}.button-secondary{color:var(--brand-deep);background:rgba(252,252,250,0.55)}.hero-note{position:relative;padding:30px 30px 32px;border:1px solid rgba(96,125,139,0.16);border-radius:8px 8px 48px 8px;background:rgba(252,252,250,0.76);box-shadow:var(--shadow);transform:rotate(1.5deg)}.hero-note::before{position:absolute;top:-11px;left:50%;width:74px;height:23px;background:rgba(194,209,216,0.72);content:"";transform:translateX(-50%) rotate(-2deg)}.hero-note p{margin:0;color:var(--muted)}.hero-note strong{display:block;margin-bottom:14px;color:var(--ink);font-size:1.18rem;font-weight:600}.section{padding:78px 0}.section-muted{border-block:1px solid rgba(217,224,227,0.8);background:rgba(229,236,239,0.56)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}.section-heading h2{margin:0;font-size:clamp(1.75rem,4vw,2.35rem);letter-spacing:0.04em}.section-heading p{max-width:520px;margin:8px 0 0;color:var(--muted)}.text-link{flex:0 0 auto;border-bottom:1px solid rgba(96,125,139,0.45);color:var(--brand-deep);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.9rem}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.note-card{display:flex;min-height:255px;flex-direction:column;padding:26px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);box-shadow:0 12px 36px 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var(--brand-soft)}.topic-number{display:grid;width:42px;height:42px;place-items:center;border-radius:50%;color:var(--brand-deep);background:var(--brand-soft);font-family:Georgia,serif}.topic h3{margin:20px 0 8px;font-size:1.16rem}.topic p{margin:0;color:var(--muted);font-size:0.94rem}.quote-panel{position:relative;max-width:860px;margin-inline:auto;padding:46px 64px;text-align:center}.quote-panel::before,.quote-panel::after{position:absolute;color:rgba(96,125,139,0.16);font-family:Georgia,serif;font-size:6rem;line-height:1}.quote-panel::before{top:8px;left:6px;content:"“"}.quote-panel::after{right:6px;bottom:-12px;content:"”"}.quote-panel blockquote{margin:0;font-size:clamp(1.3rem,3vw,1.75rem);line-height:1.8}.quote-panel p{margin:14px 0 0;color:var(--muted)}.page-hero{padding:90px 0 55px;text-align:center}.page-hero h1{font-size:clamp(2.3rem,6vw,4.2rem)}.page-hero p{max-width:650px;margin:20px auto 0;color:var(--muted);font-size:1.04rem}.archive-list{display:grid;max-width:900px;margin:0 auto;border-top:1px solid var(--line)}.archive-item{display:grid;grid-template-columns:70px 1fr auto;align-items:center;gap:22px;padding:26px 14px;border-bottom:1px solid var(--line);transition:padding 0.2s ease,background 0.2s ease}.archive-item:hover{padding-inline:22px;background:rgba(252,252,250,0.58)}.archive-index{color:var(--warm);font-family:Georgia,serif;font-size:0.86rem;letter-spacing:0.1em}.archive-item h2{margin:0 0 4px;font-size:1.17rem}.archive-item p{margin:0;color:var(--muted);font-size:0.9rem}.archive-tag{padding:4px 10px;border-radius:999px;color:var(--brand-deep);background:var(--brand-soft);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.75rem;white-space:nowrap}.about-layout{display:grid;max-width:900px;grid-template-columns:210px 1fr;gap:70px;margin:0 auto}.about-aside{position:sticky;top:105px;align-self:start;padding:24px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface)}.about-aside span{display:block;color:var(--brand);font-size:2.7rem;line-height:1}.about-aside strong{display:block;margin-top:16px;font-size:1.05rem}.about-aside p{margin:8px 0 0;color:var(--muted);font-size:0.88rem}.prose{color:#39464d}.prose h2{margin:2.1em 0 0.75em;color:var(--ink);font-size:1.55rem;line-height:1.4}.prose h2:first-child{margin-top:0}.prose h3{margin:1.8em 0 0.65em;color:var(--ink);font-size:1.17rem}.prose p,.prose ul,.prose ol{margin:0 0 1.15em}.prose li + li{margin-top:0.45em}.prose a:not(.button){color:var(--brand-deep);border-bottom:1px solid rgba(96,125,139,0.32)}.prose code{padding:0.12em 0.38em;border-radius:5px;color:#405d6b;background:#e8eef0;font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:0.88em}.prose pre{margin:1.5em 0;padding:20px 22px;overflow-x:auto;border:1px solid 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78px;font-size:1.03rem}.article-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:var(--reading);margin:0 auto 78px;padding-top:28px;border-top:1px solid var(--line);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.9rem}.article-nav a{color:var(--brand-deep)}.site-footer{min-height:64px;padding:18px 0;border-top:1px solid var(--line);color:var(--muted);background:rgba(229,236,239,0.52);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:0.82rem}.footer-beian{display:flex;align-items:center;flex-wrap:wrap;justify-content:center;gap:6px 24px;text-align:center}.footer-beian a{transition:color 0.2s ease}.footer-beian a:hover{color:var(--brand-deep)}.back-to-top{position:fixed;right:24px;bottom:24px;z-index:20;display:grid;width:42px;height:42px;place-items:center;border:1px solid rgba(96,125,139,0.25);border-radius:50%;opacity:0;color:var(--brand-deep);background:rgba(252,252,250,0.9);box-shadow:0 8px 24px rgba(45,66,77,0.12);pointer-events:none;transform:translateY(10px);transition:opacity 0.2s ease,transform 0.2s ease}.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}@media (max-width:850px){.hero-grid{grid-template-columns:1fr;gap:50px}.hero-note{max-width:440px}.hero::after{display:none}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.about-layout{grid-template-columns:1fr;gap:32px}.about-aside{position:static}}@media (max-width:640px){.nav-wrap,.container{width:min(calc(100% - 30px),var(--content))}.nav-wrap{min-height:64px}.nav-toggle{display:block}.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(6.5px) rotate(45deg)}.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}.nav-toggle[aria-expanded="true"] span:last-child{transform:translateY(-6.5px) rotate(-45deg)}.site-nav{position:absolute;top:calc(100% + 8px);right:0;display:none;width:min(240px,calc(100vw - 30px));flex-direction:column;align-items:stretch;padding:10px;border:1px solid var(--line);border-radius:15px;background:rgba(252,252,250,0.98);box-shadow:var(--shadow)}.site-nav.is-open{display:flex}.site-nav a{padding:9px 12px}.hero{min-height:auto;padding:65px 0 60px}.hero h1{font-size:clamp(3.1rem,20vw,5rem)}.section{padding:58px 0}.section-heading{align-items:start;flex-direction:column;margin-bottom:26px}.card-grid,.topic-grid{grid-template-columns:1fr}.note-card{min-height:225px}.quote-panel{padding:34px 30px}.page-hero{padding:65px 0 38px}.archive-item{grid-template-columns:42px 1fr;gap:14px}.archive-tag{display:none}.article-header{padding:58px 0 36px}.article-body{padding:38px 0 55px;font-size:1rem}.article-nav{margin-bottom:58px}.site-footer{min-height:58px;padding:15px 0}.footer-beian{gap:4px 16px}.back-to-top{right:15px;bottom:15px}}@media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto !important;transition-duration:0.01ms !important}}