:root{--paper:#f8f6f1;--paper-2:#f1ede4;--surface:#ffffff;--ink:#16181d;--ink-2:#3a3d45;--muted:#6e6c66;--faint:#a6a29a;--rule:#e4dfd4;--rule-strong:#d3ccbe;--accent:#1e3a5f;--accent-2:#2c5282;--accent-soft:#e8eef6;--on-accent:#ffffff;--gold:#a8874b;--ok:#2f6f4e;--ok-soft:#e6f2ea;--warn:#8a5a00;--warn-soft:#fbf1dc;--bad:#9b2c2c;--bad-soft:#f8e6e4;--shadow-sm:0 1px 2px rgba(22,24,29,0.05);--shadow:0 1px 2px rgba(22,24,29,0.04),0 8px 24px rgba(22,24,29,0.06);--shadow-lg:0 2px 4px rgba(22,24,29,0.04),0 24px 60px rgba(22,24,29,0.12);--radius-sm:8px;--radius:14px;--radius-lg:22px;--serif:var(--font-serif),"Iowan Old Style","Palatino Linotype",Georgia,"Songti SC","Noto Serif CJK SC",serif;--sans:var(--font-sans),system-ui,-apple-system,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;--cjk-serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",var(--serif);color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--paper:#111214;--paper-2:#17181b;--surface:#1b1d21;--ink:#eeece6;--ink-2:#cfccc4;--muted:#9b988f;--faint:#6b6962;--rule:#2a2c31;--rule-strong:#393b41;--accent:#9cc1ea;--accent-2:#b8d3f1;--accent-soft:#1d2a3a;--on-accent:#0d1622;--gold:#c9a96b;--ok:#79c39a;--ok-soft:#17291f;--warn:#e4b75c;--warn-soft:#2c2414;--bad:#ec8d84;--bad-soft:#2f1a19;--shadow-sm:0 1px 2px rgba(0,0,0,0.3);--shadow:0 1px 2px rgba(0,0,0,0.3),0 8px 24px rgba(0,0,0,0.35);--shadow-lg:0 2px 4px rgba(0,0,0,0.3),0 24px 60px rgba(0,0,0,0.5);color-scheme:dark}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--accent-2)}img,svg{display:block;max-width:100%}::selection{background:var(--accent-soft)}.container{width:100%;max-width:1160px;margin:0 auto;padding:0 24px}.container.narrow{max-width:760px}.container.mid{max-width:980px}main{min-height:70vh}.section{padding:96px 0}.section.tight{padding:64px 0}.section.alt{background:var(--paper-2);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}.eyebrow{font:600 12px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin:0 0 18px}.display{font-family:var(--serif);font-weight:400;letter-spacing:-.02em;font-size:clamp(40px,6vw,72px);line-height:1.04;margin:0 0 24px}.display em{font-style:italic;color:var(--accent)}:lang(ja) em,:lang(zh) em{font-style:normal}:lang(ja){--cjk-serif:"Hiragino Mincho ProN","Yu Mincho","YuMincho","Noto Serif CJK JP","Source Han Serif JP",var(--font-serif),serif}:lang(zh){--cjk-serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",var(--font-serif),serif}html:lang(ja) :is(h1,h2,h3,.display,.lead){word-break:auto-phrase}:lang(zh-Hant){--cjk-serif:"Songti TC","Noto Serif CJK TC","Source Han Serif TC","PMingLiU",var(--font-serif),serif}html:lang(zh-Hant){--serif:var(--font-serif),"Iowan Old Style",Georgia,"Songti TC","Noto Serif CJK TC",serif;--sans:var(--font-sans),system-ui,-apple-system,"PingFang TC","Microsoft JhengHei","Noto Sans CJK TC",sans-serif}html:lang(ja){--serif:var(--font-serif),"Iowan Old Style",Georgia,"Hiragino Mincho ProN","Yu Mincho","Noto Serif CJK JP",serif;--sans:var(--font-sans),system-ui,-apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo","Noto Sans CJK JP",sans-serif}.h1,h1{letter-spacing:-.015em;font-size:clamp(32px,4vw,44px);line-height:1.12}.h1,.h2,h1,h2{font-family:var(--serif);font-weight:400;margin:0 0 14px}.h2,h2{letter-spacing:-.01em;font-size:clamp(26px,3vw,36px);line-height:1.18}.h3,h3{font:600 17px/1.35 var(--sans);margin:0 0 8px;letter-spacing:-.005em}.lead{font-size:clamp(17px,1.6vw,20px);line-height:1.6;color:var(--ink-2);max-width:620px;margin:0 0 32px}.muted{color:var(--muted)}.small{font-size:14px}.tiny{font-size:12.5px}.serif{font-family:var(--serif)}.center{text-align:center}.section-head{max-width:640px;margin:0 0 48px}.section-head.center{margin-left:auto;margin-right:auto}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 82%,transparent);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--rule)}.site-header .container{display:flex;align-items:center;height:68px;gap:28px}.wordmark{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);margin-right:auto}.wordmark-mark{width:28px;height:28px}.wordmark-text{font-family:var(--serif);font-size:21px;letter-spacing:-.01em}.nav{display:flex;align-items:center;gap:26px}.nav a{color:var(--ink-2);text-decoration:none;font-size:15px}.nav a:hover{color:var(--ink)}.nav a.btn-primary,.nav a.btn-primary:hover{color:var(--paper)}.nav a.btn-primary:hover{background:var(--accent);color:var(--on-accent)}.wordmark-text{white-space:nowrap}.menu{position:relative}.menu>summary{list-style:none;cursor:pointer;display:flex;align-items:center}.menu>summary::-webkit-details-marker{display:none}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-weight:600;font-size:14px;border:1px solid var(--rule)}.burger{display:grid;grid-gap:4px;gap:4px;padding:8px 4px}.burger i{display:block;width:20px;height:2px;background:var(--ink);border-radius:1px}.menu-panel{position:absolute;right:0;top:calc(100% + 10px);min-width:230px;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);padding:8px;display:flex;flex-direction:column;z-index:50}.menu-panel .menu-item,.menu-panel a{padding:10px 12px;border-radius:6px;font:inherit;font-size:15px;line-height:1.4;color:var(--ink-2);text-decoration:none;text-align:left;background:none;border:0;cursor:pointer}.menu-panel .menu-item:hover,.menu-panel a:hover{background:var(--paper-2);color:var(--ink)}.menu-who{margin:0 0 6px;padding:8px 12px 12px;border-bottom:1px solid var(--rule);font-size:13px;color:var(--muted);overflow-wrap:anywhere}.menu-who strong{color:var(--ink);font-weight:600}.show-sm,.show-sm-flex{display:none!important}.nav .who{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav .who,.site-footer{color:var(--muted);font-size:14px}.site-footer{border-top:1px solid var(--rule);padding:56px 0 48px;margin-top:40px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(2,1fr);grid-gap:40px;gap:40px}.footer-grid h4{font:600 12px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin:0 0 16px}.footer-grid ul{list-style:none;margin:0;padding:0;display:grid;grid-gap:10px;gap:10px}.footer-grid a{color:var(--muted);text-decoration:none}.footer-grid a:hover{color:var(--ink)}.footer-base{margin-top:44px;padding-top:22px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:48px;padding:0 24px;border-radius:999px;border:1px solid transparent;font:600 15px/1 var(--sans);letter-spacing:.005em;text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,color .15s,transform .15s,box-shadow .15s;white-space:nowrap}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--ink);color:var(--paper);box-shadow:var(--shadow-sm)}.btn-accent,.btn-primary:hover{background:var(--accent);color:var(--on-accent)}.btn-accent:hover{background:var(--accent-2);color:var(--on-accent)}.btn-ghost{background:transparent;color:var(--ink);border-color:var(--rule-strong)}.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}.btn-danger{background:transparent;color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,transparent)}.btn-danger:hover{background:var(--bad-soft);color:var(--bad)}.btn-sm{height:38px;padding:0 16px;font-size:14px}.btn-lg{height:56px;padding:0 30px;font-size:16px}.btn-block{width:100%}.btn:disabled,.btn[aria-disabled=true]{opacity:.45;cursor:not-allowed;transform:none}.btn .arrow{transition:transform .15s}.btn:hover .arrow{transform:translateX(3px)}.link-btn{background:none;border:0;padding:0;color:var(--accent);font:inherit;cursor:pointer;text-decoration:underline;text-underline-offset:3px}.panel{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.panel-pad{padding:28px}.stack{display:grid;grid-gap:20px;gap:20px;align-content:start}.panel-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}.panel-title h2,.panel-title h3{margin:0}.hairline{height:1px;background:var(--rule);border:0;margin:24px 0}.pill{display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;border-radius:999px;font:600 12.5px/1 var(--sans);letter-spacing:.01em;background:var(--paper-2);color:var(--ink-2);border:1px solid var(--rule)}.pill:before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;opacity:.8}.pill.ok{background:var(--ok-soft);color:var(--ok)}.pill.ok,.pill.warn{border-color:transparent}.pill.warn{background:var(--warn-soft);color:var(--warn)}.pill.bad{background:var(--bad-soft);color:var(--bad)}.pill.bad,.pill.live{border-color:transparent}.pill.live{background:var(--accent-soft);color:var(--accent)}.pill.live:before{animation:pulse 1.6s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.25}}.notice{display:flex;gap:12px;padding:14px 16px;border-radius:var(--radius-sm);background:var(--warn-soft);color:var(--ink);font-size:14.5px;margin:16px 0}.notice.info{background:var(--accent-soft)}.notice.bad{background:var(--bad-soft)}.notice strong{font-weight:600}.error{color:var(--bad);font-size:14px;margin-top:12px}.hero{padding:88px 0 80px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:-40% -20% auto auto;width:760px;height:760px;border-radius:50%;background:radial-gradient(closest-side,color-mix(in srgb,var(--accent) 10%,transparent),transparent 70%);pointer-events:none}.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;grid-gap:64px;gap:64px;align-items:center;position:relative}.hero-actions{gap:14px;align-items:center}.hero-actions,.hero-note{display:flex;flex-wrap:wrap}.hero-note{margin-top:22px;font-size:14px;color:var(--muted);gap:18px}.hero-note span{display:inline-flex;align-items:center;gap:7px}.check-icon{width:16px;height:16px;color:var(--ok);flex:none}.book{position:relative;display:grid;grid-template-columns:1fr 1fr;border-radius:6px;background:var(--surface);box-shadow:var(--shadow-lg);border:1px solid var(--rule);transform:perspective(1600px) rotateY(-6deg) rotateX(2deg);transform-origin:center}.book:after{content:"";position:absolute;top:0;bottom:0;left:50%;width:40px;transform:translateX(-50%);background:linear-gradient(90deg,transparent,rgba(0,0,0,.07) 45%,rgba(0,0,0,.12) 50%,rgba(0,0,0,.07) 55%,transparent);pointer-events:none}.book-page{padding:34px 30px 30px;min-height:380px}.book-page+.book-page{border-left:1px solid var(--rule)}.book-folio{font:600 10.5px/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-bottom:22px}.book-chapter{font-family:var(--serif);font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin:0 0 6px}.book-title{font-size:24px;line-height:1.2;margin:0 0 18px}.book-text,.book-title{font-family:var(--serif)}.book-text{font-size:14.5px;line-height:1.7;color:var(--ink-2);margin:0 0 12px}.book-page.zh .book-text{text-align:justify}.book-page.zh .book-text,.book-page.zh .book-title{font-family:var(--cjk-serif)}.book-page.zh .book-text{letter-spacing:.02em}.book-badge{position:absolute;bottom:-18px;right:24px;background:var(--ink);color:var(--paper);font:600 12px/1 var(--sans);letter-spacing:.06em;padding:10px 14px;border-radius:999px;box-shadow:var(--shadow)}.trust{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}.trust div{padding:26px 24px}.trust div+div{border-left:1px solid var(--rule)}.trust strong{display:block;font-family:var(--serif);font-weight:400;font-size:26px;letter-spacing:-.01em;margin-bottom:4px}.trust span{font-size:14px;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:0;gap:0;counter-reset:step}.step{padding:0 28px 0 0;position:relative}.step+.step{padding-left:28px;border-left:1px solid var(--rule)}.step-num{font-family:var(--serif);font-size:44px;line-height:1;color:var(--gold);margin-bottom:18px}.step p{color:var(--muted);font-size:15px;margin:0}.editions{display:grid;grid-template-columns:1fr 1fr;grid-gap:28px;gap:28px}.edition{padding:32px}.edition-sheet{background:var(--paper);border:1px solid var(--rule);border-radius:8px;padding:22px 24px;margin-bottom:24px;min-height:172px}.edition-sheet p{margin:0 0 10px;font-family:var(--serif);font-size:15px;line-height:1.65}.edition-sheet .src{color:var(--muted)}.edition-sheet .tr{font-family:var(--cjk-serif);color:var(--ink)}.lang-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:14px;gap:14px}.lang-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px 22px;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius)}.lang-pair{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;font-family:var(--serif);font-size:19px}.lang-arrow{color:var(--gold)}.price-grid{display:grid;grid-template-columns:1.1fr 1fr;grid-gap:48px;gap:48px;align-items:start}.hero-grid>*,.order-grid>*,.price-grid>*{min-width:0}.dropzone strong{overflow-wrap:anywhere;word-break:break-word;max-width:100%;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.price-big{font-family:var(--serif);font-size:clamp(56px,7vw,84px);line-height:1;letter-spacing:-.03em}.price-big small{font-family:var(--sans);font-size:16px;color:var(--muted);letter-spacing:0;margin-left:8px;white-space:nowrap}.examples{width:100%;border-collapse:collapse}.examples td{padding:16px 0;border-bottom:1px solid var(--rule);font-size:15.5px}.examples td:last-child{text-align:right;font-family:var(--serif);font-size:20px}.promise-list{list-style:none;padding:0;margin:0;display:grid;grid-gap:18px;gap:18px}.promise-list li{display:grid;grid-template-columns:22px 1fr;grid-gap:14px;gap:14px}.promise-list strong{display:block;font-weight:600;margin-bottom:2px}.promise-list span{color:var(--muted);font-size:15px}.faq{border-top:1px solid var(--rule)}.faq details{border-bottom:1px solid var(--rule);padding:22px 0}.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-family:var(--serif);font-size:21px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";font-family:var(--sans);font-weight:300;font-size:26px;line-height:1;color:var(--muted);transition:transform .2s}.faq details[open] summary:after{transform:rotate(45deg)}.faq details p{color:var(--ink-2);margin:14px 0 0;max-width:720px}.cta-band{text-align:center}.cta-band .display{font-size:clamp(36px,5vw,56px)}.field{margin-bottom:24px}.field-label{display:block;font:600 14px/1.3 var(--sans);margin-bottom:10px;color:var(--ink)}.field-help{font-size:13.5px;color:var(--muted);margin-top:8px}.input,.select{width:100%;height:50px;padding:0 16px;border:1px solid var(--rule-strong);border-radius:10px;background:var(--surface);color:var(--ink);font:15.5px var(--sans);transition:border-color .15s,box-shadow .15s;-webkit-appearance:none;-moz-appearance:none;appearance:none}.select{background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 22px) 22px,calc(100% - 16px) 22px;background-size:6px 6px;background-repeat:no-repeat;padding-right:40px}.input:focus,.select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 16%,transparent)}.select:disabled{opacity:.6}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:10px;border:1.5px dashed var(--rule-strong);border-radius:var(--radius);padding:44px 24px;background:var(--paper);cursor:pointer;transition:border-color .15s,background .15s}.dropzone.over,.dropzone:hover{border-color:var(--accent);background:var(--accent-soft)}.dropzone.has-file{border-style:solid;border-color:var(--accent);background:var(--surface)}.dropzone svg{width:40px;height:40px;color:var(--accent)}.dropzone strong{font-family:var(--serif);font-weight:400;font-size:22px}.dropzone input{display:none}.file-btn{display:flex;align-items:center;gap:12px;min-height:50px;padding:0 6px 0 16px;border:1px solid var(--rule-strong);border-radius:10px;background:var(--surface);cursor:pointer}.file-btn input{display:none}.file-btn .file-name{flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:14.5px}.file-btn .btn{height:38px}.file-btn[aria-disabled=true]{opacity:.55;cursor:not-allowed}.choice-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.choice{position:relative;display:block;padding:16px 18px 16px 46px;border:1px solid var(--rule-strong);border-radius:12px;background:var(--surface);cursor:pointer;transition:border-color .15s,box-shadow .15s,background .15s}.choice:hover{border-color:var(--ink-2)}.choice input{position:absolute;left:18px;top:19px;accent-color:var(--accent);width:16px;height:16px;margin:0}.choice strong{display:block;font-size:15px;font-weight:600;margin-bottom:3px}.choice span{font-size:13.5px;color:var(--muted)}.choice:has(input:checked){border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}.consent{display:grid;grid-template-columns:20px 1fr;grid-gap:12px;gap:12px;align-items:start;font-size:14.5px;color:var(--ink-2);padding:14px 0;border-top:1px solid var(--rule);cursor:pointer}.consent input{accent-color:var(--accent);width:17px;height:17px;margin:3px 0 0}.auth-wrap{min-height:calc(100vh - 220px);display:grid;place-items:center;padding:64px 24px}.auth-card{width:100%;max-width:440px;padding:44px 40px}.auth-card .wordmark-mark{width:40px;height:40px;margin-bottom:26px}.order-head{padding:48px 0 32px}.library .title,.order-title{overflow-wrap:anywhere;word-break:break-word}.library a>span:nth-child(2){min-width:0}.steps-list{list-style:none;padding:0;margin:0;display:grid;grid-gap:10px;gap:10px;font-size:14px;color:var(--muted)}.steps-list li{display:flex;gap:10px;align-items:center}.steps-list li:before{content:"";width:8px;height:8px;border-radius:50%;border:1.5px solid var(--faint);flex:none}.order-meta{display:flex;gap:14px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:14px}.stepper{display:grid;grid-template-columns:repeat(6,1fr);grid-gap:8px;gap:8px;margin:28px 0 8px}.stepper-item{display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--faint)}.stepper-bar{height:3px;border-radius:3px;background:var(--rule)}.stepper-item.done{color:var(--ink-2)}.stepper-item.done .stepper-bar{background:var(--ink)}.stepper-item.current{color:var(--accent);font-weight:600}.stepper-item.current .stepper-bar{background:var(--accent)}.order-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;grid-gap:32px;gap:32px;align-items:start;padding-bottom:40px}.sidebar{position:-webkit-sticky;position:sticky;top:92px}.summary dl{margin:0;display:grid;grid-gap:0;gap:0}.summary .row{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--rule);font-size:14.5px}.summary .row:last-child{border-bottom:0}.summary dt{color:var(--muted)}.summary dd{margin:0;text-align:right;font-weight:500}.summary-price{font-family:var(--serif);font-size:46px;line-height:1;letter-spacing:-.02em;margin:6px 0 4px}.coverage{display:grid;grid-gap:10px;gap:10px}.coverage-bar{display:flex;height:10px;border-radius:10px;overflow:hidden;background:var(--rule)}.coverage-bar i{display:block;background:var(--accent)}.coverage-bar i+i{background:var(--faint)}.coverage-legend{display:flex;gap:20px;font-size:13.5px;color:var(--muted);flex-wrap:wrap}.coverage-legend b{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px;vertical-align:-1px}.skip-list{margin:16px 0 0;padding:0;list-style:none;display:grid;grid-gap:0;gap:0}.skip-list li{display:flex;justify-content:space-between;padding:10px 0;border-top:1px dashed var(--rule);font-size:14.5px}.skip-list li span:last-child{color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.options-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:0 20px;gap:0 20px}.segmented{display:grid;grid-template-columns:1fr 1fr;grid-gap:0;gap:0;border:1px solid var(--rule-strong);border-radius:10px;overflow:hidden}.segmented button{height:48px;border:0;background:var(--surface);color:var(--ink-2);font:500 14.5px var(--sans);cursor:pointer}.segmented button+button{border-left:1px solid var(--rule-strong)}.segmented button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.segmented button:disabled{cursor:not-allowed}.reader{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden;background:var(--surface)}.reader-col{position:relative;padding:26px 28px;max-height:520px;overflow:auto}.reader-col+.reader-col{border-left:1px solid var(--rule);background:var(--paper)}.reader-head{font:600 11px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-bottom:18px}.reader p{font-family:var(--serif);font-size:16px;line-height:1.75;margin:0 0 14px}.reader .zh p,.reader p:lang(ja),.reader p:lang(zh){font-family:var(--cjk-serif);letter-spacing:.02em}.progress-ring{display:flex;align-items:center;gap:22px}.progress-track{flex:1 1;height:8px;border-radius:8px;background:var(--rule);overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:8px;transition:width .6s ease}.progress-fill.indeterminate{width:35%!important;animation:slide 1.4s ease-in-out infinite}@keyframes slide{0%{transform:translateX(-100%)}to{transform:translateX(290%)}}.progress-num{font-family:var(--serif);font-size:36px;line-height:1;min-width:92px;text-align:right}.delivery{display:grid;grid-template-columns:1fr 1fr;grid-gap:18px;gap:18px}.cover{display:flex;flex-direction:column;justify-content:space-between;aspect-ratio:5/3.4;padding:22px;border-radius:10px;color:#f4efe4;background:linear-gradient(150deg,#1e3a5f,#13243b);position:relative;overflow:hidden;border:0;cursor:pointer;text-align:left;font:inherit;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}.cover:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.cover.alt{background:linear-gradient(150deg,#5b3a29,#2f1e15)}.cover:before{content:"";position:absolute;left:14px;top:0;bottom:0;width:1px;background:rgba(255,255,255,.15)}.cover-kicker{font:600 10.5px/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;opacity:.7}.cover-title{font-family:var(--serif);font-size:26px;line-height:1.15}.cover-cta{font:600 13.5px/1 var(--sans);display:flex;align-items:center;gap:8px;opacity:.9}.timeline{list-style:none;margin:0;padding:0}.timeline li{display:grid;grid-template-columns:14px 1fr auto;grid-gap:14px;gap:14px;align-items:baseline;padding:9px 0;font-size:14px}.timeline li:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--rule-strong);transform:translateY(-1px)}.timeline li:last-child:before{background:var(--accent)}.timeline time{color:var(--faint);font-size:13px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.notes-table{width:100%;border-collapse:collapse;font-size:14px}.notes-table td{padding:11px 8px 11px 0;border-top:1px solid var(--rule);vertical-align:top}.notes-table td:first-child{color:var(--faint);white-space:nowrap;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.notes-table td:nth-child(2){font-family:var(--serif)}.library{display:grid;grid-gap:0;gap:0;border-top:1px solid var(--rule)}.library a{display:grid;grid-template-columns:52px minmax(0,1fr) auto auto;grid-gap:20px;gap:20px;align-items:center;padding:20px 4px;border-bottom:1px solid var(--rule);text-decoration:none;color:var(--ink);transition:background .15s}.library a:hover{background:var(--surface)}.spine{width:40px;height:54px;border-radius:3px 5px 5px 3px;background:linear-gradient(150deg,var(--accent),color-mix(in srgb,var(--accent) 60%,#000));box-shadow:inset 4px 0 0 rgba(0,0,0,.18),var(--shadow-sm)}.library .title{font-family:var(--serif);font-size:19px;line-height:1.25}.library .sub{font-size:13.5px;color:var(--muted);margin-top:3px}.library .amount{font-family:var(--serif);font-size:18px;color:var(--ink-2);min-width:80px;text-align:right}.empty{text-align:center;padding:80px 24px;border:1px dashed var(--rule-strong);border-radius:var(--radius)}.matrix-wrap{overflow-x:auto;margin-top:20px}.matrix{border-collapse:collapse;font-size:14px;min-width:100%}.matrix caption{caption-side:bottom;text-align:left;padding-top:10px}.matrix td,.matrix th{padding:10px;border-bottom:1px solid var(--rule);text-align:right;white-space:nowrap;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.matrix thead th{font-weight:600;color:var(--muted);font-size:12.5px}.matrix th[scope=row],.matrix thead th:first-child{text-align:left;color:var(--ink-2)}.matrix .faint{color:var(--faint)}.prose{font-size:17px;line-height:1.75;color:var(--ink-2)}.prose h2{margin-top:44px;font-size:26px;color:var(--ink)}.prose p{margin:0 0 18px}@media (max-width:980px){.hero-grid,.price-grid{gap:48px}.hero-grid,.order-grid,.price-grid{grid-template-columns:1fr}.sidebar{position:static}.book{transform:none}.steps{grid-template-columns:1fr 1fr;gap:36px 0}.step:nth-child(3){padding-left:0;border-left:0}.trust{grid-template-columns:1fr 1fr}.trust div:nth-child(3){border-left:0}.trust div:nth-child(n+3){border-top:1px solid var(--rule)}}@media (max-width:680px){.container{padding:0 16px}.section{padding:64px 0}.hero{padding:48px 0 56px}.site-header .container{gap:12px;height:60px}.wordmark-text{font-size:18px}.wordmark-mark{width:24px;height:24px}.nav{gap:14px}.nav a{font-size:14px}.nav .hide-sm{display:none}.show-sm{display:block!important}.price-big small{display:block;margin:8px 0 0;white-space:normal}.show-sm-flex{display:flex!important}.nav .btn-sm{height:34px;padding:0 13px;font-size:13px}.book-page{padding:22px 18px;min-height:0}.book-text:nth-of-type(n+4){display:none}.book-badge{bottom:-14px;right:14px}.choice-grid,.delivery,.editions,.footer-grid,.options-grid,.steps{grid-template-columns:1fr}.step,.step+.step{padding:0;border-left:0}.reader{grid-template-columns:1fr}.reader-col+.reader-col{border-left:0;border-top:1px solid var(--rule)}.stepper{grid-template-columns:repeat(6,1fr)}.stepper-item span{display:none}.stepper-item.current span{display:block;white-space:nowrap}.order-grid .sidebar{order:-1}.history-side{display:none}.history-main{display:block!important}.library a{grid-template-columns:40px minmax(0,1fr)}.library .amount,.library .pill{grid-column:2;justify-self:start}.panel-pad{padding:22px}.auth-card{padding:32px 24px}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.lang-switch select{font:inherit;font-size:13px;color:var(--muted);background:transparent;border:1px solid var(--rule);border-radius:999px;padding:5px 12px;cursor:pointer}.lang-switch select:hover{color:var(--ink)}.menu-panel .lang-switch{display:block;padding:8px 12px 4px}.nav>a,.nav>span{white-space:nowrap}@media (max-width:1240px) and (min-width:981px){.nav{gap:18px}.nav .hide-md{display:none}}@font-face{font-family:Newsreader;font-style:italic;font-weight:200 800;font-display:swap;src:url(/_next/static/media/eb251072d3b5478c-s.woff2) format("woff2");unicode-range:u+0102-0103,u+0110-0111,u+0128-0129,u+0168-0169,u+01a0-01a1,u+01af-01b0,u+0300-0301,u+0303-0304,u+0308-0309,u+0323,u+0329,u+1ea0-1ef9,u+20ab}@font-face{font-family:Newsreader;font-style:italic;font-weight:200 800;font-display:swap;src:url(/_next/static/media/e92f802bb57ccffe-s.woff2) format("woff2");unicode-range:u+0100-02ba,u+02bd-02c5,u+02c7-02cc,u+02ce-02d7,u+02dd-02ff,u+0304,u+0308,u+0329,u+1d00-1dbf,u+1e00-1e9f,u+1ef2-1eff,u+2020,u+20a0-20ab,u+20ad-20c0,u+2113,u+2c60-2c7f,u+a720-a7ff}@font-face{font-family:Newsreader;font-style:italic;font-weight:200 800;font-display:swap;src:url(/_next/static/media/4b9bb515ce6d026f-s.p.woff2) format("woff2");unicode-range:u+00??,u+0131,u+0152-0153,u+02bb-02bc,u+02c6,u+02da,u+02dc,u+0304,u+0308,u+0329,u+2000-206f,u+20ac,u+2122,u+2191,u+2193,u+2212,u+2215,u+feff,u+fffd}@font-face{font-family:Newsreader;font-style:normal;font-weight:200 800;font-display:swap;src:url(/_next/static/media/7088c2b12ccac062-s.woff2) format("woff2");unicode-range:u+0102-0103,u+0110-0111,u+0128-0129,u+0168-0169,u+01a0-01a1,u+01af-01b0,u+0300-0301,u+0303-0304,u+0308-0309,u+0323,u+0329,u+1ea0-1ef9,u+20ab}@font-face{font-family:Newsreader;font-style:normal;font-weight:200 800;font-display:swap;src:url(/_next/static/media/665e920483964785-s.woff2) format("woff2");unicode-range:u+0100-02ba,u+02bd-02c5,u+02c7-02cc,u+02ce-02d7,u+02dd-02ff,u+0304,u+0308,u+0329,u+1d00-1dbf,u+1e00-1e9f,u+1ef2-1eff,u+2020,u+20a0-20ab,u+20ad-20c0,u+2113,u+2c60-2c7f,u+a720-a7ff}@font-face{font-family:Newsreader;font-style:normal;font-weight:200 800;font-display:swap;src:url(/_next/static/media/5611c55482296524-s.p.woff2) format("woff2");unicode-range:u+00??,u+0131,u+0152-0153,u+02bb-02bc,u+02c6,u+02da,u+02dc,u+0304,u+0308,u+0329,u+2000-206f,u+20ac,u+2122,u+2191,u+2193,u+2212,u+2215,u+feff,u+fffd}@font-face{font-family:Newsreader Fallback;src:local("Times New Roman");ascent-override:69.68%;descent-override:25.12%;line-gap-override:0.00%;size-adjust:105.48%}.__className_328ff9{font-family:Newsreader,Newsreader Fallback}.__variable_328ff9{--font-serif:"Newsreader","Newsreader Fallback"}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/ba9851c3c22cd980-s.woff2) format("woff2");unicode-range:u+0460-052f,u+1c80-1c8a,u+20b4,u+2de0-2dff,u+a640-a69f,u+fe2e-fe2f}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/21350d82a1f187e9-s.woff2) format("woff2");unicode-range:u+0301,u+0400-045f,u+0490-0491,u+04b0-04b1,u+2116}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/c5fe6dc8356a8c31-s.woff2) format("woff2");unicode-range:u+1f??}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/19cfc7226ec3afaa-s.woff2) format("woff2");unicode-range:u+0370-0377,u+037a-037f,u+0384-038a,u+038c,u+038e-03a1,u+03a3-03ff}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/df0a9ae256c0569c-s.woff2) format("woff2");unicode-range:u+0102-0103,u+0110-0111,u+0128-0129,u+0168-0169,u+01a0-01a1,u+01af-01b0,u+0300-0301,u+0303-0304,u+0308-0309,u+0323,u+0329,u+1ea0-1ef9,u+20ab}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/8e9860b6e62d6359-s.woff2) format("woff2");unicode-range:u+0100-02ba,u+02bd-02c5,u+02c7-02cc,u+02ce-02d7,u+02dd-02ff,u+0304,u+0308,u+0329,u+1d00-1dbf,u+1e00-1e9f,u+1ef2-1eff,u+2020,u+20a0-20ab,u+20ad-20c0,u+2113,u+2c60-2c7f,u+a720-a7ff}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/e4af272ccee01ff0-s.p.woff2) format("woff2");unicode-range:u+00??,u+0131,u+0152-0153,u+02bb-02bc,u+02c6,u+02da,u+02dc,u+0304,u+0308,u+0329,u+2000-206f,u+20ac,u+2122,u+2191,u+2193,u+2212,u+2215,u+feff,u+fffd}@font-face{font-family:Inter Fallback;src:local("Arial");ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.00%;size-adjust:107.12%}.__className_f367f3{font-family:Inter,Inter Fallback;font-style:normal}.__variable_f367f3{--font-sans:"Inter","Inter Fallback"}