@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.fixed{position:fixed}.static{position:static}.start{inset-inline-start:var(--spacing)}.block{display:block}.contents{display:contents}.hidden{display:none}.table{display:table}}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--paper:#f2eadc;--paper-light:#fff9ed;--ink:#17120d;--muted:#64584c;--prose:#42382f;--red:#c64332;--green:#0b6b50;--blue:#154f83;--ochre:#c99022;--line:#17120d33;--line-strong:#17120d;--surface:#fff;--panel:#fff7e8;--inverse:#fff;--grid-line:#17120d0b;--footer:#e7dbc8;--shadow:#17120d;--max:1180px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--radius-sm:6px;--radius-md:12px;--radius-lg:18px;--touch-target:44px;--shadow-soft:0 16px 44px #17120d1a;--sans:ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;--serif:"Noto Serif TC", "Songti TC", "PMingLiU", Georgia, "Times New Roman", serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--paper:#11100e;--paper-light:#1a1714;--ink:#f6efe3;--muted:#beb2a4;--prose:#e5d8ca;--red:#ff8f79;--green:#66d3ac;--blue:#8bbff5;--ochre:#f2c261;--line:#f6efe33d;--line-strong:#f6efe3;--surface:#171411;--panel:#211d18;--inverse:#11100e;--grid-line:#f6efe30e;--footer:#181512;--shadow:#050505}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{color:var(--ink);background-color:var(--paper);background-image:linear-gradient(90deg, var(--grid-line) 1px, transparent 1px), linear-gradient(180deg, var(--grid-line) 1px, transparent 1px), linear-gradient(180deg, var(--paper-light), var(--paper));font-family:var(--sans);-webkit-font-smoothing:antialiased;background-size:28px 28px,28px 28px,100% 100%;margin:0;line-height:1.58}button,input,select{color:inherit;font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a{color:inherit}mark{color:var(--ink);background:var(--ochre);padding:0 .08em}@supports (color:color-mix(in lab, red, red)){mark{background:color-mix(in srgb, var(--ochre) 58%, transparent)}}:focus-visible{outline:3px solid var(--red);outline-offset:3px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.site-shell{min-height:100vh;overflow:clip}.section-pad{width:min(var(--max), calc(100% - 32px));margin-inline:auto}.site-header{z-index:100;border-bottom:2px solid var(--line-strong);background:var(--paper-light);position:sticky;top:0}@supports (color:color-mix(in lab, red, red)){.site-header{background:color-mix(in srgb, var(--paper-light) 96%, transparent)}}.site-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.nav-wrap{grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;width:min(1280px,100% - 32px);min-height:72px;margin:auto;display:grid}.brand{width:fit-content;color:inherit;align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand-mark{width:42px;height:42px;color:var(--inverse);background:var(--ink);border:2px solid var(--line-strong);font-family:var(--serif);border-radius:4px;flex:none;place-items:center;font-size:24px;font-weight:800;display:grid}.brand-copy{align-content:center;gap:0;min-width:0;display:grid}.brand-copy strong{font-family:var(--serif);font-size:17px;line-height:1.2}.brand-copy small{color:var(--muted);letter-spacing:.12em;font-size:9px;font-weight:800;line-height:1.4}.site-nav{align-items:center;gap:4px;display:flex}.site-nav a,.site-nav button{color:var(--muted);background:0 0;border:1px solid #0000;border-radius:4px;padding:10px 11px;font-size:14px;font-weight:800;text-decoration:none}.site-nav a:hover,.site-nav button:hover{color:var(--ink);background:var(--surface);border-color:var(--line-strong)}.nav-actions{justify-self:end;gap:8px;display:flex}.theme-toggle,.nav-cta{border:2px solid var(--line-strong);border-radius:4px;min-height:42px;padding:0 14px;font-weight:800}.theme-toggle{background:var(--surface);width:42px;padding:0}.nav-cta{color:var(--inverse);background:var(--ink)}.theme-toggle:hover,.nav-cta:hover{box-shadow:3px 3px 0 var(--shadow);transform:translate(-2px,-2px)}.hero{grid-template-columns:minmax(0,1.3fr) minmax(310px,.7fr);align-items:center;gap:42px 54px;padding-block:72px 60px;display:grid}.hero-copy{min-width:0}.eyebrow{width:fit-content;color:var(--ink);border-left:8px solid var(--green);letter-spacing:.04em;text-transform:uppercase;margin:0 0 16px;padding-left:11px;font-size:14px;font-weight:800}.hero h1{font-family:var(--serif);letter-spacing:-.045em;margin:0;font-size:clamp(52px,6.2vw,78px);font-weight:800;line-height:1.04}.hero h1 span{display:block}.hero h1 span:nth-child(3){color:var(--red)}.lede{max-width:720px;color:var(--muted);margin:26px 0 0;font-size:19px;line-height:1.85}.release-board{background:var(--surface);border:2px solid var(--line-strong);box-shadow:10px 10px 0 var(--shadow);border-radius:4px}.release-board>header{border-bottom:2px solid var(--line-strong);letter-spacing:.12em;justify-content:space-between;align-items:center;min-height:46px;padding:8px 10px 8px 14px;font-size:11px;font-weight:900;display:flex}.release-board>header b{color:var(--inverse);background:var(--level-color,var(--green));padding:5px 8px}.release-title{border-bottom:1px solid var(--line);padding:30px 26px 25px}.release-title p,.release-title span{color:var(--muted);margin:0;font-size:13px;font-weight:750}.release-title strong{font-family:var(--serif);margin:5px 0 1px;font-size:clamp(45px,5vw,64px);line-height:1;display:block}.release-board dl{margin:0}.release-board dl div{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;min-height:52px;padding:10px 15px;display:flex}.release-board dt{color:var(--muted);font-size:13px}.release-board dd{margin:0;font-weight:900}.release-status{align-items:center;gap:9px;padding:13px 15px;font-size:12px;font-weight:800;display:flex}.release-status i{background:var(--level-color,var(--green));width:9px;height:9px;box-shadow:0 0 0 4px var(--level-color,var(--green));border-radius:50%}@supports (color:color-mix(in lab, red, red)){.release-status i{box-shadow:0 0 0 4px color-mix(in srgb, var(--level-color,var(--green)) 16%, transparent)}}.learner-ticket .release-title{border-left:10px solid var(--level-color)}.learner-ticket .release-title strong{font-size:clamp(38px,4vw,54px)}.learner-ticket .release-title span{margin-top:12px;line-height:1.65;display:block}.level-picker{border:2px solid var(--line-strong);grid-column:1/-1;grid-template-columns:repeat(4,1fr);scroll-margin-top:100px;display:grid}.level-picker button{text-align:left;border:0;border-top:9px solid var(--level-color);background:0 0;grid-template-rows:auto auto auto 1fr auto;grid-template-columns:1fr auto;align-items:start;gap:8px;min-height:230px;padding:20px;display:grid}.level-picker button+button{border-left:1px solid var(--line-strong)}.level-picker button:hover{background:var(--level-color)}@supports (color:color-mix(in lab, red, red)){.level-picker button:hover{background:color-mix(in srgb, var(--level-color) 8%, var(--surface))}}.level-picker button.active{color:var(--inverse);background:var(--level-color)}.level-picker button>span{color:var(--muted);letter-spacing:.15em;font-size:12px;font-weight:900}.level-picker button.active>span,.level-picker button.active>small,.level-picker button.active>p,.level-picker button.active>em{color:var(--inverse)}.level-picker button>small{color:var(--level-color);font-size:12px;font-weight:900}.level-picker button>strong{font-family:var(--serif);grid-column:1/-1;font-size:28px}.level-picker button>p{color:var(--muted);grid-column:1/-1;margin:0;font-size:14px;line-height:1.65}.level-picker button>em{color:var(--level-color);grid-column:1/-1;align-self:end;font-size:13px;font-style:normal;font-weight:900}.route-section{background:var(--paper-light);border-block:2px solid var(--line-strong);padding-block:76px}.section-head,.database-head{grid-template-columns:minmax(0,1.15fr) minmax(280px,.65fr);align-items:end;gap:40px;display:grid}.section-head h2,.database-head h2,.about-grid h2{font-family:var(--serif);margin:0;font-size:clamp(39px,5vw,60px);line-height:1.08}.section-head>p,.database-head>p{color:var(--muted);margin:0 0 3px;font-size:16px;line-height:1.8}.personal-route{border:2px solid var(--line-strong);border-top:10px solid var(--level-color);background:var(--surface);margin-top:40px}.personal-route>header,.personal-route>footer{justify-content:space-between;align-items:center;gap:18px;min-height:52px;padding:10px 16px;font-size:12px;display:flex}.personal-route>header{border-bottom:2px solid var(--line-strong)}.personal-route>header span{letter-spacing:.1em;font-weight:900}.personal-route>header strong{color:var(--level-color)}.personal-route>div{grid-template-columns:repeat(3,1fr);display:grid}.personal-route>div button{text-align:left;background:0 0;border:0;grid-template-rows:auto auto 1fr auto;grid-template-columns:1fr auto;align-items:start;gap:8px;min-height:220px;padding:20px;display:grid}.personal-route>div button+button{border-left:1px solid var(--line-strong)}.personal-route>div button:hover{background:var(--level-color)}@supports (color:color-mix(in lab, red, red)){.personal-route>div button:hover{background:color-mix(in srgb, var(--level-color) 8%, var(--surface))}}.personal-route>div button>span{font-size:12px;font-weight:900}.personal-route>div button>small{color:var(--level-color);font-weight:900}.personal-route>div button>strong{font-family:var(--serif);grid-column:1/-1;margin-top:18px;font-size:26px}.personal-route>div button>p{color:var(--muted);grid-column:1/-1;margin:0;font-size:14px}.personal-route>div button>b{color:var(--level-color);grid-column:1/-1;align-self:end;font-size:18px}.personal-route>footer{color:var(--muted);border-top:1px solid var(--line-strong)}.personal-route>footer a{color:var(--level-color);flex:none;font-weight:900;text-decoration:none}.library-head{justify-content:space-between;align-items:end;gap:28px;margin-top:58px;display:flex}.library-head>div{display:grid}.library-head small{color:var(--red);letter-spacing:.12em;font-size:10px;font-weight:900}.library-head strong{font-family:var(--serif);font-size:32px}.library-head p{color:var(--muted);margin:0 0 4px;font-size:14px}.book-list{border-top:2px solid var(--line-strong);margin-top:16px}.book-list>button,.book-loading{text-align:left;border:0;border-bottom:1px solid var(--line-strong);background:0 0;grid-template-columns:82px 80px minmax(0,1fr) auto 32px;align-items:center;gap:14px;width:100%;min-height:82px;padding:13px 10px;display:grid}.book-list>button:hover{background:var(--book-color);padding-left:17px}@supports (color:color-mix(in lab, red, red)){.book-list>button:hover{background:color-mix(in srgb, var(--book-color) 10%, var(--surface))}}.book-number{color:var(--book-color);font-family:var(--serif);font-size:24px;font-weight:800}.book-series{letter-spacing:.08em;font-size:14px;font-weight:900}.book-name{min-width:0;display:grid}.book-name strong{font-family:var(--serif);font-size:20px}.book-name small,.book-count{color:var(--muted);font-size:12px}.book-list>button>b{font-size:19px}.learning-lab{background:linear-gradient(180deg, var(--paper-light), transparent 28%);min-height:780px;padding-bottom:96px}@supports (color:color-mix(in lab, red, red)){.learning-lab{background:linear-gradient(180deg, color-mix(in srgb, var(--paper-light) 75%, transparent), transparent 28%)}}.learner-context{background:var(--surface);border-inline:2px solid var(--line-strong);border-bottom:1px solid var(--line-strong);min-height:64px;box-shadow:inset 9px 0 0 var(--level-color);grid-template-columns:auto minmax(220px,1fr) auto;align-items:center;gap:16px;display:grid}.learner-context>div{padding-left:18px;display:grid}.learner-context>div span,.learner-context>div small{color:var(--muted);letter-spacing:.06em;font-size:10px;font-weight:850}.learner-context>div strong{font-family:var(--serif);font-size:20px}.learner-context>p{color:var(--muted);margin:0;font-size:13px}.learner-context>a{color:var(--level-color);margin-right:18px;font-size:12px;font-weight:900;text-decoration:none}.mode-tabs{z-index:80;background:var(--paper-light);border:1px solid var(--line-strong);border-top:0;grid-template-columns:repeat(4,1fr);display:grid;position:sticky;top:72px}.mode-tabs button{min-height:52px;color:var(--muted);background:0 0;border:0;justify-content:center;align-items:center;gap:10px;font-size:15px;font-weight:900;display:flex}.mode-tabs button+button{border-left:1px solid var(--line-strong)}.mode-tabs button span{letter-spacing:.1em;font-size:10px}.mode-tabs button.active{color:var(--inverse);background:var(--green);box-shadow:inset 0 -4px 0 var(--inverse)}@supports (color:color-mix(in lab, red, red)){.mode-tabs button.active{box-shadow:inset 0 -4px 0 color-mix(in srgb, var(--inverse) 32%, transparent)}}.reader-shell{grid-template-columns:200px minmax(0,1fr);align-items:start;gap:18px;padding-top:24px;display:grid}.reader-shell.focus-mode{grid-template-columns:minmax(0,1000px);justify-content:center}.reader-shell.focus-mode .reader-rail{display:none}.reader-shell.focus-mode .reader-main{width:100%;max-width:1000px}.reader-rail{border:1px solid var(--line-strong);border-radius:var(--radius-md);background:var(--surface);box-shadow:0 10px 30px var(--ink);position:sticky;top:148px;overflow:hidden}@supports (color:color-mix(in lab, red, red)){.reader-rail{box-shadow:0 10px 30px color-mix(in srgb, var(--ink) 8%, transparent)}}.reader-rail>header{border-bottom:1px solid var(--line-strong);padding:10px 12px;display:grid}.reader-rail>header small{color:var(--muted);letter-spacing:.13em;font-size:9px;font-weight:900}.reader-rail>header strong{font-family:var(--serif);font-size:20px}.rail-books{display:grid}.rail-books button{text-align:left;border:0;border-bottom:1px solid var(--line);background:0 0;grid-template-columns:48px 1fr auto;align-items:center;min-height:48px;padding:6px 10px;display:grid}.rail-books button:hover,.rail-books button.active{background:var(--book-color)}@supports (color:color-mix(in lab, red, red)){.rail-books button:hover,.rail-books button.active{background:color-mix(in srgb, var(--book-color) 14%, var(--surface))}}.rail-books button:hover,.rail-books button.active{box-shadow:inset 5px 0 0 var(--book-color)}.rail-books button span{font-family:var(--serif);font-weight:900}.rail-books button b{font-size:13px}.rail-books button small{color:var(--muted);font-size:10px}.rail-progress{background:var(--panel);grid-template-columns:1fr auto;align-items:end;padding:10px 12px;display:grid}.rail-progress>span{color:var(--muted);font-size:11px}.rail-progress>strong{font-size:20px}.rail-progress>strong small{color:var(--muted);font-size:11px}.rail-progress>div{background:var(--line);grid-column:1/-1;height:5px;margin-top:9px;overflow:hidden}.rail-progress>div i{background:var(--green);height:100%;display:block}.reader-main{min-width:0}.reader-command-bar{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden}.reader-header{grid-template-columns:minmax(0,1fr) auto;justify-content:space-between;align-items:center;gap:16px;min-height:72px;padding:10px 12px 8px 14px;display:grid}.reader-header p{color:var(--muted);letter-spacing:.11em;margin:0 0 3px;font-size:11px;font-weight:900}.reader-header h2{font-family:var(--serif);margin:0;font-size:clamp(26px,3vw,32px);line-height:1.08}.reader-page-controls{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-md);grid-template-columns:auto minmax(112px,1fr) auto;align-items:stretch;min-width:286px;display:grid;overflow:hidden}.reader-page-controls>button{min-width:var(--touch-target);min-height:48px;color:var(--green);background:0 0;border:0;align-items:center;gap:6px;padding:0 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