/*! tailwindcss v4.3.3 | MIT License | https://tailwindcss.com */@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,::backdrop,:after,:before{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:host,:root{--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","Noto Sans",Arial,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;--color-stone-100:oklch(97% .001 106.424);--color-stone-200:oklch(92.3% .003 48.717);--color-stone-500:oklch(55.3% .013 58.071);--spacing:.25rem;--text-xs:.75rem;--text-xs--line-height:calc(1 / .75);--text-sm:.875rem;--text-sm--line-height:calc(1.25 / .875);--text-3xl:1.875rem;--text-3xl--line-height:calc(2.25 / 1.875);--animate-pulse:pulse 2s cubic-bezier(.4,0,.6,1) infinite;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4,0,.2,1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,::backdrop,:after,:before{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}:host,html{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","Noto Sans",Arial,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;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{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:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}menu,ol,ul{list-style:none}audio,canvas,embed,iframe,img,object,svg,video{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,optgroup,select,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,::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-millisecond-field,::-webkit-datetime-edit-second-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,::-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}.\!relative{position:relative!important}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.isolate{isolation:isolate}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.my-16{margin-block:calc(var(--spacing) * 16)}.mt-3{margin-top:calc(var(--spacing) * 3)}.mt-4{margin-top:calc(var(--spacing) * 4)}.mt-5{margin-top:calc(var(--spacing) * 5)}.mb-3{margin-bottom:calc(var(--spacing) * 3)}.mb-5{margin-bottom:calc(var(--spacing) * 5)}.mb-6{margin-bottom:calc(var(--spacing) * 6)}.mb-8{margin-bottom:calc(var(--spacing) * 8)}.ml-2{margin-left:calc(var(--spacing) * 2)}.ml-auto{margin-left:auto}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.h-3{height:calc(var(--spacing) * 3)}.h-12{height:calc(var(--spacing) * 12)}.h-72{height:calc(var(--spacing) * 72)}.w-1\/3{width:33.3333%}.w-16{width:calc(var(--spacing) * 16)}.border-collapse{border-collapse:collapse}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.animate-pulse{animation:var(--animate-pulse)}.resize{resize:both}.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-3{gap:calc(var(--spacing) * 3)}.gap-6{gap:calc(var(--spacing) * 6)}.gap-7{gap:calc(var(--spacing) * 7)}.gap-8{gap:calc(var(--spacing) * 8)}.gap-x-7{column-gap:calc(var(--spacing) * 7)}.gap-y-4{row-gap:calc(var(--spacing) * 4)}.self-center{align-self:center}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.border-b{border-bottom-style:var(--tw-border-style);border-bottom-width:1px}.border-stone-200{border-color:var(--color-stone-200)}.bg-stone-100{background-color:var(--color-stone-100)}.bg-stone-200{background-color:var(--color-stone-200)}.text-3xl{font-size:var(--text-3xl);line-height:var(--tw-leading,var(--text-3xl--line-height))}.text-sm{font-size:var(--text-sm);line-height:var(--tw-leading,var(--text-sm--line-height))}.text-xs{font-size:var(--text-xs);line-height:var(--tw-leading,var(--text-xs--line-height))}.text-stone-500{color:var(--color-stone-500)}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px)}.blur,.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}@media (min-width:48rem){.md\:flex-row{flex-direction:row}.md\:items-start{align-items:flex-start}.md\:justify-between{justify-content:space-between}}}:root{--paper:#f6f5f0;--ink:#202a25;--green:#244d3f;--muted:#737971;--line:#d9dcd3;--soft:#eeefe8;--white:#fffefa}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Helvetica Neue,PingFang SC,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.65}a,button,input,select{touch-action:manipulation}a,button{transition:background .2s,color .2s,transform .2s,border-color .2s}button{cursor:pointer;font:inherit}button:disabled{opacity:.45;cursor:not-allowed}.button:active,button:active{transform:translateY(1px)}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--green);outline-offset:4px}h1,h2,h3,p{margin:0}svg{flex-shrink:0;width:20px;height:20px}input,select{font:inherit;border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:4px;min-width:0;padding:11px 14px}input::placeholder{color:#92958d}select{max-width:100%}.container{width:min(1240px,100% - 96px);margin-inline:auto}.eyebrow{letter-spacing:.19em;color:var(--green);font-size:11px;font-weight:500;line-height:1.6}.button{background:var(--green);color:var(--white);border:1px solid var(--green);white-space:nowrap;border-radius:4px;justify-content:center;align-items:center;gap:18px;padding:16px 24px;font-weight:500;line-height:1.4;display:inline-flex}.button:hover{color:#fff;background:#193b30;transform:translateY(-2px)}.button-small{gap:12px;padding:11px 17px;font-size:13px}.button-outline{color:var(--green);background:0 0}.button-outline:hover{background:var(--green);color:var(--white)}.button-neutral{background:var(--white);color:var(--ink);border-color:var(--line)}.text-link{color:var(--green);background:0 0;border:0;border-bottom:1px solid #809788;align-items:center;gap:14px;padding-bottom:5px;font-weight:500;line-height:1.4;display:inline-flex}.text-link:hover{border-color:var(--green);gap:19px}.skip-link{z-index:10;background:var(--green);color:#fff;padding:10px;position:absolute;top:-100px;left:20px}.skip-link:focus{top:15px}.site-header{border-bottom:1px solid var(--line);z-index:3;background:var(--paper);position:relative}.site-header>.container{height:88px}.brand{gap:11px}.brand,.brand-icon{align-items:center;display:flex}.brand-icon{background:var(--green);color:var(--paper);letter-spacing:-5px;border-radius:5px;justify-content:center;width:41px;height:44px;padding-bottom:8px;font-family:Georgia,serif;font-size:36px;line-height:1}.brand-icon span{padding-top:12px;padding-right:3px;font-size:23px}.brand strong{letter-spacing:-.6px;font-size:21px;font-weight:650}.brand-light{font-weight:400}.brand small{letter-spacing:2px;color:var(--muted);margin-top:2px;font-size:10px;display:block}.desktop-nav{gap:30px;font-size:13px;display:flex}.desktop-nav a{padding-block:30px;position:relative}.desktop-nav a.active:after{content:"";border-bottom:2px solid var(--green);position:absolute;bottom:19px;left:0;right:0}.active{color:var(--green)}.header-actions{align-items:center;gap:24px;font-size:13px;display:flex}.workspace-link{border-right:1px solid var(--line);padding-right:24px}.mobile-menu{background:0 0;border:0;display:none}.mobile-nav{border-top:1px solid var(--line);padding:10px 24px 22px}.mobile-nav a{justify-content:space-between;padding:13px 0;display:flex}.hero{grid-template-columns:1.05fr 1fr;align-items:center;gap:30px;min-height:570px;padding-block:30px 35px;display:grid;overflow:visible}.hero-copy{z-index:1;position:relative}.hero .eyebrow{margin-bottom:28px}.hero h1{letter-spacing:-2.5px;white-space:nowrap;font-size:clamp(30px,3vw,42px);font-weight:650;line-height:1.35}.hero h1 span{color:var(--green)}.hero-description{color:#626961;margin-top:27px;font-size:18px;line-height:1.9}.hero-actions{margin-top:24px}.hero-exams{color:var(--muted);letter-spacing:.4px;white-space:nowrap;align-items:center;gap:12px;margin-top:55px;font-size:11px;display:flex}.hero-exams>span{border-top:1px solid #809186;width:28px}.hero-exams b{color:#a3aaa0;font-weight:400}.paper-scene{isolation:isolate;height:510px;position:relative}.scene-orbit{border:1px solid #748e7b;width:470px;max-width:105%;height:470px;top:4px;left:-25px;transform:rotate(-16deg)}.scene-dot,.scene-orbit{border-radius:50%;position:absolute}.scene-dot{background:var(--green);width:11px;height:11px;top:75px;left:30px}.green-book{color:#dedac0;letter-spacing:1px;background:#2c5042;border-radius:4px 0 0 4px;flex-direction:column;justify-content:space-between;width:310px;height:375px;padding:26px 22px;font-family:Georgia,serif;font-size:15px;display:flex;position:absolute;top:130px;left:32px;transform:rotate(-14deg);box-shadow:-6px 8px #779080,0 24px 40px #244d3f25}.green-book:before{content:"";left:10px;border-left:1px solid #93aa9180;position:absolute;inset-block:0}.green-book small{letter-spacing:3px;font-size:10px}.exam-paper{color:#364035;background:#faf9ef;border:1px solid #e8e6d8;width:340px;height:457px;padding:26px 25px;font-family:Georgia,serif;position:absolute;top:42px;left:106px;transform:rotate(9deg);box-shadow:0 18px 40px #3b4e3330,1px 0 #d8d8cb}.paper-top{letter-spacing:1px;justify-content:space-between;font-size:7px;display:flex}.exam-paper h2{letter-spacing:-1px;margin-top:14px;font-size:33px;font-weight:400;line-height:1.4}.paper-subtitle{color:#76816e;margin-block:4px 13px;font-size:9px}.paper-rule{background:#bac1b2;height:1px;margin-block:15px}.paper-question{grid-template-columns:23px 1fr;font-size:12px;line-height:1.7;display:grid}.paper-choices{white-space:nowrap;margin-top:10px;padding-left:23px;font-size:9px}.paper-geometry{fill:none;stroke:#4c6450;stroke-width:.8px;width:190px;height:126px;margin:1px auto;display:block}.paper-geometry text{fill:#4c6450;stroke:none;font-family:Georgia;font-size:10px}.paper-bottom{letter-spacing:1px;justify-content:space-between;font-size:6px;display:flex}.paper-bottom span{letter-spacing:-.5px;font-size:12px}.scene-label{background:var(--white);border:1px solid #e1e4da;padding:16px 20px;font-size:12px;position:absolute;top:12px;right:0;box-shadow:0 4px 20px #29442b0d}.scene-label small{color:var(--muted);margin-top:4px;margin-left:13px;font-size:10px;display:block}.tiny-dot{background:var(--green);vertical-align:middle;border-radius:50%;width:5px;height:5px;margin-right:8px;display:inline-block}.scene-note{background:var(--white);border:1px solid var(--line);color:var(--green);padding:15px 26px;font-size:12px;position:absolute;bottom:12px;left:8px;box-shadow:0 8px 20px #3b4e330a}.scene-note span{color:#a6ad9f;margin-inline:10px}.pencil{background:linear-gradient(90deg,#163b2d 45%,#45674e 45% 80%,#1e4432 80%);border-bottom:17px solid #d9c29c;width:12px;height:260px;position:absolute;top:215px;right:20px;transform:rotate(-26deg);box-shadow:4px 5px 8px #30472c25}.pencil:before{border-bottom:32px solid #ccb993;border-left:6px solid #0000;border-right:6px solid #0000;left:0}.pencil:after,.pencil:before{content:"";position:absolute;top:-32px}.pencil:after{border-bottom:11px solid #374535;border-left:3px solid #0000;border-right:3px solid #0000;left:3px}.category-strip{border-block:1px solid var(--line)}.category-grid{grid-template-columns:repeat(3,1fr);padding-block:27px;display:grid}.category-grid>a{border-right:1px solid var(--line);align-items:center;gap:26px;padding:5px 25px;display:flex}.category-grid>a:first-child{padding-left:0}.category-grid>a:last-child{border:0}.category-number{color:var(--green);font-family:Georgia,serif;font-size:38px;line-height:1}.category-grid h2{margin-bottom:4px;font-size:18px;font-weight:550}.category-grid p{color:var(--muted);font-size:12px}.category-grid svg{width:17px;height:17px;color:var(--muted);margin-left:auto}.section-block{padding-block:84px 72px}.section-heading{justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:33px;display:flex}.section-heading .eyebrow{margin-bottom:12px}.section-heading h2{letter-spacing:-1.1px;font-size:34px;font-weight:550;line-height:1.4}.section-heading>.text-link{flex-shrink:0;margin-bottom:5px;font-size:13px}.section-description{color:var(--muted);font-size:13px;line-height:1.9}.tabs{border-bottom:1px solid var(--line);gap:33px;margin-bottom:28px;display:flex;overflow-x:auto}.tabs button{color:var(--muted);white-space:nowrap;background:0 0;border:0;padding:13px 0 16px;font-size:14px;position:relative}.tabs button.selected{color:var(--green);font-weight:550}.tabs button.selected:after{content:"";border-bottom:2px solid var(--green);position:absolute;bottom:0;left:0;right:0}.featured-exams{grid-template-columns:1.55fr 1fr;gap:20px;display:grid}.amc-feature{color:var(--paper);background:#2b4e40;border-radius:6px;align-items:center;min-height:400px;padding:33px 35px;display:flex;position:relative;overflow:hidden}.amc-feature:hover{color:#fff;background:#244838}.amc-feature .eyebrow{color:#c3d0c1;letter-spacing:.12em;font-size:10px}.feature-copy{z-index:1;position:relative}.amc-feature h3{letter-spacing:-5px;margin-top:32px;font-size:90px;font-weight:550;line-height:1.05}.feature-period{color:#bccab4}.amc-series{letter-spacing:.4px;margin-top:10px;font-size:14px}.feature-description{margin-top:25px;font-size:18px}.feature-cta{border-bottom:1px solid #b4c4b2;align-items:center;gap:25px;margin-top:27px;padding-bottom:5px;font-size:14px;display:inline-flex}.orbit{fill:none;stroke:currentColor;stroke-width:.7px;color:#849383;width:100%;height:auto}.orbit text{fill:currentColor;stroke:none;font-family:Georgia,serif;font-size:12px}.amc-feature>.orbit{color:#b3c1ad;width:310px;position:absolute;bottom:42px;right:-15px}.featured-secondary{grid-template-rows:1fr 1fr;gap:20px;display:grid}.secondary-feature{background:var(--soft);border-radius:6px;align-items:center;min-height:190px;padding:28px 30px;display:flex;position:relative;overflow:hidden}.secondary-feature>div{z-index:1;position:relative}.secondary-feature .eyebrow{letter-spacing:.13em;font-size:9px}.secondary-feature h3{letter-spacing:-1px;color:var(--green);margin-block:10px 6px;font-size:33px;line-height:1.3}.secondary-feature p{color:var(--muted);max-width:175px;font-size:12px}.secondary-feature .text-link{margin-top:16px;font-size:12px}.secondary-feature>.orbit{opacity:.8;width:175px;position:absolute;bottom:12px;right:-9px}.secondary-feature:last-child>.orbit{width:143px;right:7px}.practice-section{padding-bottom:75px}.journey-grid{border-block:1px solid var(--line);grid-template-columns:repeat(3,1fr);display:grid}.journey-item{border-right:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:28px 32px 31px;display:flex}.journey-item:first-child{padding-left:0}.journey-item:last-child{border:0}.journey-top{width:100%;color:var(--green);justify-content:space-between;align-items:center;margin-bottom:26px;display:flex}.journey-top svg{width:27px;height:27px}.journey-top span{color:var(--muted);font-family:Georgia;font-size:13px}.journey-item h3{margin-bottom:12px;font-size:20px;font-weight:550}.journey-item p{color:var(--muted);max-width:310px;margin-bottom:25px;font-size:13px;line-height:1.9}.journey-item .text-link{margin-top:auto;font-size:12px}.teacher-banner{background:#e9eee3;border-radius:6px;justify-content:space-between;align-items:center;gap:30px;margin-bottom:78px;padding:36px 40px;display:flex}.teacher-banner h2{margin-block:8px;font-size:26px;font-weight:500}.teacher-banner p:not(.eyebrow){color:#68755f;font-size:13px}.teacher-banner .button{padding:13px 21px;font-size:13px}.site-footer{border-top:1px solid var(--line);padding-block:40px 23px}.footer-brand{letter-spacing:-.6px;color:var(--green);font-size:20px;font-weight:600}.footer-top p{color:var(--muted);margin-top:7px;font-size:12px}.footer-top nav{padding-top:8px;font-size:12px}.footer-top nav a{align-items:center;gap:7px;display:flex}.footer-top nav svg{width:13px;height:13px}.footer-bottom{color:#858a80;border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;gap:15px;margin-top:35px;padding-top:19px;font-size:10px;display:flex}.footer-bottom div{gap:24px;display:flex}.page-heading{padding-block:12px}.page-heading>.eyebrow{margin-bottom:10px}.page-heading h1{letter-spacing:-.025em;font-size:22px;font-weight:550;line-height:1.3}.visually-hidden{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.title-dot{color:var(--green);margin-left:3px}.page-description{color:var(--muted);max-width:740px;margin-top:8px;font-size:14px;line-height:1.6}.page-wrap{min-height:65dvh;padding-bottom:80px}.catalog-search{margin-bottom:28px}.search-input{border:1px solid var(--line);background:var(--white);max-width:400px;color:var(--muted);border-radius:4px;flex:1;align-items:center;gap:10px;padding-left:13px;display:flex}.search-input input{background:0 0;border:0;width:100%}.exam-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.exam-tile{background:var(--white);border:1px solid #e0e3d8;border-radius:5px;flex-direction:column;min-height:260px;padding:25px 26px;display:flex}.exam-tile:hover{border-color:#a3b29c;transform:translateY(-3px)}.tile-meta{color:var(--muted);justify-content:space-between;align-items:center;gap:8px;font-size:10px;display:flex}.status{white-space:nowrap;color:#7a8272;font-size:10px}.status-existing:before,.status-preview:before{content:"";vertical-align:middle;background:var(--green);border-radius:50%;width:5px;height:5px;margin-right:6px;display:inline-block}.exam-tile h3{letter-spacing:-.7px;margin-block:24px 10px;font-size:26px;font-weight:550;line-height:1.35}.exam-tile>p{color:var(--muted);max-width:310px;font-size:12px;line-height:1.9}.tile-bottom{color:var(--muted);justify-content:space-between;align-items:center;margin-top:auto;padding-top:24px;font-size:10px;display:flex}.tile-bottom svg{width:17px;height:17px}.empty-state{text-align:center;border:1px dashed var(--line);padding:75px 25px}.empty-state h3{font-size:20px;font-weight:500}.empty-state p{color:var(--muted);margin-block:12px 24px}.notice{background:var(--soft);color:#69725f;border-left:3px solid #95a58a;padding:17px 21px;font-size:12px;line-height:1.9}.notice strong{color:var(--green);font-weight:550}.notice-warning{color:#776140;background:#f2ecdf;border-color:#ab8350}.detail-grid{grid-template-columns:1.7fr 1fr;gap:50px;margin-block:20px 45px;display:grid}.detail-panel{border-top:1px solid var(--line);padding-top:24px}.detail-panel h2,.subheading{margin-bottom:20px;font-size:22px;font-weight:500}.module-list{grid-template-columns:1fr 1fr;gap:0 26px;display:grid}.module-list>div{border-bottom:1px solid var(--line);align-items:center;gap:20px;padding:17px 0;font-size:13px;display:flex}.module-list span{color:var(--muted);font-family:Georgia;font-size:12px}.action-panel{background:#e9eee3;border-radius:5px;padding:25px}.action-panel h2{margin-bottom:13px;font-size:22px;font-weight:500}.action-panel p{color:var(--muted);margin-bottom:20px;font-size:13px}.action-panel .button{width:100%;margin-top:7px;font-size:13px}.content-rows{border-top:1px solid var(--line)}.content-row{border-bottom:1px solid var(--line);grid-template-columns:80px 1fr auto;align-items:center;gap:25px;padding:27px 0;display:grid}.content-row>span{color:var(--green);font-family:Georgia,serif;font-size:32px}.content-row h2{letter-spacing:-.5px;margin-bottom:6px;font-size:22px;font-weight:500}.content-row p{color:var(--muted);max-width:650px;font-size:13px}.content-row .button{padding:12px 19px;font-size:12px}.directory-section+.directory-section{margin-top:52px}.directory-section .section-heading{margin-bottom:18px}.directory-section .section-heading>span{color:var(--muted);font-size:12px}.directory-section .content-row{color:inherit;text-decoration:none}.directory-section .content-row>span:first-child{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-family:inherit;font-size:13px}.directory-section .content-row .text-link{white-space:nowrap}.directory-note{color:var(--muted);align-items:center;gap:18px;margin-top:28px;font-size:13px;display:flex}.directory-note .text-link{white-space:nowrap}.course-row{border-top:1px solid var(--line);grid-template-columns:1fr 2fr;gap:20px;padding:16px 0;display:grid}.course-row h2{font-size:18px;font-weight:500;line-height:1.5}.course-row p{color:var(--muted);margin-bottom:20px;font-size:13px;line-height:1.9}.content-prose{max-width:720px}.content-prose h2{margin-block:30px 10px;font-size:21px;font-weight:500}.content-prose p{color:var(--muted);margin-bottom:15px;font-size:14px;line-height:2}.tool-grid{grid-template-columns:minmax(0,1fr) 290px;align-items:start;gap:28px;display:grid}.tool-sidebar{background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:24px;position:sticky;top:22px}.tool-sidebar h2{margin-bottom:17px;font-size:20px;font-weight:500}.field{flex-direction:column;gap:6px;margin-block:14px;display:flex}.field>span{color:var(--muted);font-size:11px;font-weight:500}.field input,.field select,.tool-sidebar .button{width:100%;font-size:12px}.tool-sidebar .button{margin-top:12px;padding:12px}.tool-filterbar{flex-wrap:wrap;gap:12px;margin-bottom:20px;display:flex}.tool-filterbar select{padding:10px 14px;font-size:12px}.question-card{background:var(--white);border:1px solid var(--line);border-radius:5px;margin-bottom:15px;padding:25px 27px}.question-meta{color:var(--muted);justify-content:space-between;align-items:center;gap:10px;font-size:10px;display:flex}.question-tags{flex-wrap:wrap;gap:12px;display:flex}.question-card h3{margin-block:18px;font-size:16px;font-weight:500;line-height:1.9}.question-options{color:var(--muted);flex-wrap:wrap;gap:10px 25px;font-size:12px;display:flex}.question-actions{justify-content:space-between;gap:15px;margin-top:21px;display:flex}.small-action{color:var(--green);background:0 0;border:0;align-items:center;gap:7px;padding:5px 0;font-size:11px;display:inline-flex}.small-action svg{width:14px;height:14px}.answer-explanation{border-top:1px solid var(--line);color:var(--muted);margin-top:18px;padding-top:18px;font-size:13px;line-height:1.9}.answer-explanation strong{color:var(--green)}.basket-list{border-top:1px solid var(--line);margin-block:15px}.basket-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:10px;padding:10px 0;font-size:11px;display:flex}.basket-row button{color:var(--muted);background:0 0;border:0;padding:5px}.basket-row svg{width:13px;height:13px}.sidebar-note{color:var(--muted);margin-block:15px;font-size:11px;line-height:1.8}.inline-message{color:var(--green);margin-top:16px;font-size:12px;line-height:1.8}.paper-preview{border:1px solid var(--line);background:var(--white);margin-top:24px;padding:30px}.paper-preview h2{margin-bottom:10px;font-size:26px;font-weight:500}.print-meta{color:var(--muted);margin-bottom:20px;font-size:11px}.print-question{border-top:1px solid var(--line);break-inside:avoid;padding-block:20px}.print-question h3{margin-bottom:12px;font-size:14px;font-weight:500}.print-question p{margin-top:10px;font-size:12px;line-height:1.9}.print-options{flex-wrap:wrap;gap:18px;font-size:12px;display:flex}.preview-toolbar{flex-wrap:wrap;gap:10px;margin-bottom:20px;display:flex}.preview-toolbar .button{padding:10px 16px;font-size:12px}.preview-toolbar label{color:var(--muted);align-items:center;gap:9px;font-size:12px;display:flex}.mock-intro{max-width:800px;margin-bottom:35px}.mock-intro h2{margin-bottom:18px;font-size:25px;font-weight:500}.mock-facts{border-block:1px solid var(--line);grid-template-columns:repeat(3,1fr);margin-block:25px 30px;display:grid}.mock-facts>div{border-right:1px solid var(--line);padding:22px 24px}.mock-facts>div:first-child{padding-left:0}.mock-facts>div:last-child{border:0}.mock-facts strong{font-size:23px;font-weight:500;display:block}.mock-facts span{color:var(--muted);font-size:11px}.mock-start{flex-wrap:wrap;gap:18px;margin-top:28px}.mock-start,.mock-top{align-items:center;display:flex}.mock-top{border-block:1px solid var(--line);justify-content:space-between;gap:15px;margin-bottom:26px;padding:18px 0}.mock-top h2{font-size:17px;font-weight:500}.mock-top p{color:var(--muted);font-size:10px}.timer{color:var(--green);font-variant-numeric:tabular-nums;align-items:center;gap:10px;font-family:ui-monospace,monospace;font-size:23px;display:flex}.timer-urgent{color:#9e563f}.mock-question{background:var(--white);border:1px solid var(--line);border-radius:5px;padding:33px}.mock-question h3{margin:26px 0;font-size:20px;font-weight:500;line-height:1.9}.option-buttons{flex-direction:column;gap:11px;display:flex}.option-button{border:1px solid var(--line);text-align:left;background:0 0;border-radius:4px;align-items:center;gap:16px;padding:13px 18px;font-size:14px;display:flex}.option-button>span{border:1px solid var(--line);border-radius:50%;place-items:center;width:27px;height:27px;font-size:11px;display:grid}.option-button.chosen{color:var(--green);background:#eaf0e5;border-color:#89a07d}.option-button.chosen>span{background:var(--green);color:#fff;border-color:var(--green)}.mock-question-actions{justify-content:space-between;align-items:center;gap:20px;margin-top:20px;display:flex}.mock-question-actions .button{padding:12px 20px;font-size:12px}.question-nav{grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:17px;display:grid}.question-nav button{background:var(--white);border:1px solid var(--line);border-radius:3px;height:36px;font-size:12px;position:relative}.question-nav button.answered{background:#dfe8d8;border-color:#9cae92}.question-nav button.current{outline:2px solid var(--green);outline-offset:1px}.question-nav button.flagged:after{content:"";background:#a68040;border-radius:50%;width:4px;height:4px;position:absolute;top:3px;right:3px}.nav-legend{color:var(--muted);margin-bottom:21px;font-size:10px;line-height:1.9}.submit-review{border-top:1px solid var(--line);margin-top:15px;padding-top:13px;font-size:12px}.report-summary{background:#e9eee3;border-radius:5px;grid-template-columns:1.3fr 2fr;gap:30px;margin-block:15px 35px;padding:32px;display:grid}.report-score{letter-spacing:-2px;color:var(--green);font-size:60px;font-weight:500;line-height:1.1}.report-score small{color:var(--muted);letter-spacing:0;font-size:18px}.report-summary h2{margin-bottom:8px;font-size:20px;font-weight:500}.report-summary p{color:var(--muted);font-size:12px}.report-counts{gap:30px;margin-top:18px;display:flex}.report-counts strong{color:var(--ink);font-size:22px;font-weight:500;display:block}.topic-reports{grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:28px;display:grid}.topic-report{border-top:1px solid var(--line);padding-top:13px;font-size:12px}.topic-report strong{font-weight:500}.topic-report>span{float:right;color:var(--muted)}.topic-meter{background:#e1e5d9;height:4px;margin-top:11px;position:relative}.topic-meter span{background:#7d9870;height:100%;display:block}.result-correct{color:var(--green)}.result-wrong{color:#996148}.report-actions{flex-wrap:wrap;gap:15px;margin-top:26px;display:flex}.report-actions .button{font-size:12px}@media (min-width:1440px){.hero h1{font-size:66px}}@media (max-width:1150px){.container{width:calc(100% - 64px)}.desktop-nav{gap:20px}.header-actions{gap:16px}.workspace-link{padding-right:16px}.brand strong{font-size:18px}.hero{gap:18px;min-height:590px}.hero h1{font-size:38px}.hero-description{font-size:15px}.paper-scene{transform-origin:100%;transform:scale(.9)}.scene-label{right:-10px}.amc-feature>.orbit{width:260px;right:-35px}.secondary-feature>.orbit{width:145px;right:-25px}.secondary-feature:last-child>.orbit{width:115px;right:-7px}.secondary-feature{padding:24px}.featured-exams{grid-template-columns:1.45fr 1fr}.hero-exams{gap:8px;font-size:10px}}@media (max-width:960px){.desktop-nav{display:none}.hero{grid-template-columns:1fr 1fr;min-height:550px}.hero h1{letter-spacing:-2px;font-size:43px}.paper-scene{transform-origin:0;width:460px;margin-right:-100px;transform:scale(.77)}.hero{overflow:hidden}.hero-description{font-size:14px}.hero-actions{gap:17px}.hero-actions .button{padding:13px 17px;font-size:12px}.hero-actions .text-link{font-size:12px}.hero-exams{white-space:normal;flex-wrap:wrap;margin-top:35px}.category-grid>a{gap:17px;padding-inline:20px}.category-grid h2{font-size:17px}.category-grid p{font-size:10px}.category-number{font-size:30px}.category-grid svg{display:none}.section-heading h2{font-size:29px}.amc-feature{min-height:370px;padding:27px}.amc-feature h3{font-size:72px}.amc-feature>.orbit{opacity:.7;width:245px;bottom:50px;right:-55px}.amc-series{font-size:12px}.feature-description{font-size:15px}.secondary-feature h3{font-size:26px}.secondary-feature>.orbit{opacity:.35}.secondary-feature p{max-width:200px}.exam-grid{grid-template-columns:1fr 1fr}.tool-grid{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.tool-sidebar{padding:20px}.question-card{padding:21px}.teacher-banner h2{font-size:23px}}@media (max-width:680px){.container{width:calc(100% - 40px)}.site-header>.container{height:73px}.brand-icon{width:33px;height:37px;font-size:30px}.brand strong{font-size:18px}.brand small{letter-spacing:1px;font-size:9px}.header-actions{display:none}.mobile-menu{padding:8px;display:block}.mobile-menu svg{width:23px;height:23px}.hero{grid-template-columns:1fr;gap:0;min-height:0;padding-block:43px 15px;overflow:hidden}.hero-copy{width:100%}.hero .eyebrow{letter-spacing:.15em;margin-bottom:22px;font-size:9px}.hero h1{letter-spacing:-1.5px;font-size:clamp(28px,7vw,34px);line-height:1.45}.hero-description{max-width:330px;margin-top:20px;font-size:14px;line-height:1.9}.hero-actions{gap:21px;margin-top:26px}.hero-actions .button{padding:13px 18px}.hero-exams{gap:7px;margin-top:28px;font-size:9px}.paper-scene{transform-origin:0 0;width:460px;height:365px;margin-top:28px;margin-bottom:-103px;margin-left:calc(50% - 161px);transform:scale(.7)}.scene-label{top:5px;right:20px}.category-grid{grid-template-columns:1fr;padding-block:4px}.category-grid>a,.category-grid>a:first-child{border-right:0;border-bottom:1px solid var(--line);gap:23px;padding:17px 0}.category-grid>a:last-child{border-bottom:0}.category-grid svg{display:block}.category-number{font-size:27px}.category-grid h2{margin-bottom:1px;font-size:16px}.category-grid p{font-size:10px}.section-block{padding-block:48px 40px}.section-heading{margin-bottom:25px;display:block}.section-heading h2{letter-spacing:-.8px;font-size:25px}.section-heading .eyebrow{font-size:9px}.section-heading>.text-link{margin-top:15px;font-size:11px}.tabs{gap:25px;margin-bottom:20px}.tabs button{padding-bottom:13px;font-size:12px}.featured-exams{grid-template-columns:1fr;gap:14px}.amc-feature{min-height:350px;padding:28px}.amc-feature h3{font-size:78px}.amc-feature>.orbit{width:235px;bottom:31px;right:-15px}.amc-series{font-size:12px}.feature-description{margin-top:20px;font-size:16px}.featured-secondary{gap:14px}.secondary-feature{min-height:183px;padding:25px 28px}.secondary-feature h3{font-size:29px}.secondary-feature>.orbit{opacity:.7;width:160px;right:0}.secondary-feature:last-child>.orbit{width:135px;right:4px}.practice-section{padding-bottom:40px}.section-description{margin-top:15px;font-size:12px}.journey-grid{grid-template-columns:1fr}.journey-item,.journey-item:first-child{border:0;border-bottom:1px solid var(--line);padding:23px 0}.journey-top{margin-bottom:18px}.journey-item h3{font-size:19px}.journey-item p{max-width:100%;margin-bottom:17px}.teacher-banner{margin-bottom:42px;padding:27px 24px;display:block}.teacher-banner .button{margin-top:22px}.teacher-banner h2{font-size:22px}.teacher-banner p:not(.eyebrow){font-size:12px}.site-footer{padding-top:28px}.footer-top{gap:20px}.footer-top nav{gap:16px;font-size:11px}.footer-bottom{justify-content:flex-start;margin-top:25px;font-size:9px}.footer-bottom>span:nth-child(2){width:100%}.page-heading{padding-block:10px}.page-heading h1{letter-spacing:-1px;font-size:20px}.page-description{margin-top:8px;font-size:13px}.page-wrap{padding-bottom:50px}.exam-grid{grid-template-columns:1fr}.exam-tile{min-height:230px;padding:22px}.exam-tile h3{margin-top:20px}.detail-grid{grid-template-columns:1fr;gap:26px}.module-list{gap:0 18px}.module-list>div{gap:11px;font-size:12px}.content-row{grid-template-columns:34px 1fr;gap:14px}.content-row>span{font-size:26px}.content-row .button{grid-column:2;justify-self:start}.content-row h2{font-size:21px}.content-row p{font-size:12px}.course-row{grid-template-columns:1fr;gap:13px;padding-block:25px}.course-row h2{font-size:22px}.tool-grid{grid-template-columns:1fr;gap:20px}.tool-sidebar{padding:23px;position:static}.tool-filterbar{gap:10px}.tool-filterbar select{padding:9px;font-size:11px}.question-card{padding:20px}.question-card h3{font-size:15px}.question-meta{font-size:9px}.question-options{gap:10px 17px;font-size:11px}.mock-question{padding:22px}.mock-question h3{font-size:17px}.mock-facts>div{padding:17px 15px}.mock-facts strong{font-size:19px}.mock-facts span{font-size:10px}.mock-top h2{font-size:15px}.timer{font-size:21px}.mock-question-actions{gap:12px}.mock-question-actions .button{padding:11px 14px;font-size:11px}.report-summary{grid-template-columns:1fr;gap:22px;padding:26px}.report-score{font-size:51px}.topic-reports{grid-template-columns:1fr 1fr;gap:18px}.paper-preview{padding:22px}.paper-preview h2{font-size:21px}.preview-toolbar .button{padding:10px 13px;font-size:11px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{transition:none!important;animation:none!important}}@media print{body{color:#000;background:#fff;font-size:11pt}.no-print,.page-heading,.site-footer,.site-header,.skip-link,.tool-grid{display:none!important}.container{width:100%;margin:0}.page-wrap{padding:0}.paper-preview{border:0;margin:0;padding:0}.print-question{break-inside:avoid;border-color:#aaa}.print-options{font-size:10pt}.print-meta{color:#000}@page{size:A4;margin:18mm}}.featured-home-grid{grid-template-columns:1fr 1fr;gap:17px;display:grid}.home-feature{border:1px solid var(--line);background:var(--soft);border-radius:5px;align-items:center;min-height:285px;padding:29px 32px;display:flex;position:relative;overflow:hidden}.home-feature>div:first-child{z-index:1;position:relative}.home-feature h3{letter-spacing:-.8px;margin-block:20px 12px;font-size:31px;font-weight:550;line-height:1.3}.home-feature-series{color:var(--green);letter-spacing:-.3px;font-size:19px;line-height:1.5}.home-feature-description{color:var(--muted);max-width:220px;margin-top:13px;font-size:12px;line-height:1.9}.home-feature .feature-cta{color:var(--green);border-color:#9aa78d;margin-top:22px;font-size:12px}.home-feature-math{color:var(--paper);background:#2b4e40;border-color:#2b4e40}.home-feature-math:hover{color:#fff;background:#244838}.home-feature-math .eyebrow{color:#b6c7b1}.home-feature-math .feature-cta,.home-feature-math .home-feature-series{color:var(--paper)}.home-feature-math .home-feature-description{color:#bdcbbb}.home-feature>.orbit{opacity:.85;width:200px;position:absolute;bottom:25px;right:2px}.home-feature-math>.orbit{color:#bdcbb8;width:235px;bottom:20px;right:-12px}.home-feature-admissions>.orbit{opacity:.6;width:180px;bottom:25px;right:2px}.science-series{color:var(--green);font-size:12px;line-height:2.1}.science-series span{color:#6c7862;margin-left:12px}.course-books{opacity:.85;gap:0;display:flex;bottom:38px;right:20px;transform:rotate(7deg);z-index:0!important;position:absolute!important}.course-books>span{background:#fffef5;border-left:1px solid #e3e2d5;width:62px;height:155px;padding:18px 9px;display:block;transform:rotate(-7deg);box-shadow:4px 7px 15px #5a645214}.course-books>span:nth-child(2){margin-top:18px;transform:rotate(0)}.course-books>span:nth-child(3){margin-top:30px;transform:rotate(7deg)}.course-books b{color:var(--green);font-size:15px;font-weight:400}.course-books b,.course-books small{font-family:Georgia,serif;display:block}.course-books small{color:#8f9586;margin-top:20px;font-size:7px;line-height:1.8}.subject-map{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.subject-map article{border-top:1px solid var(--line);padding:24px 0}.subject-map h2{margin-bottom:15px;font-size:24px;font-weight:500}.subject-map p{color:var(--muted);margin-block:12px;font-size:12px;line-height:1.9}.subject-map strong{color:var(--green);font-weight:500}.subject-map ul{margin:14px 0;padding:0;list-style:none}.subject-map li{border-bottom:1px solid var(--line);justify-content:space-between;gap:14px;padding:9px 0;font-size:12px;display:flex}.subject-map li span{color:var(--muted);text-align:right;font-size:10px}.subject-map .text-link{margin-top:12px;font-size:11px}.catalog-map-link{margin-bottom:28px;font-size:12px}@media (max-width:1100px){.home-feature{min-height:280px;padding:26px}.home-feature h3{font-size:27px}.home-feature-series{font-size:16px}.home-feature>.orbit{opacity:.5;width:165px;right:-20px}.home-feature-math>.orbit{opacity:.6;width:210px}.course-books{opacity:.6;right:-8px}.home-feature-admissions>.orbit{width:140px}.subject-map{grid-template-columns:1fr 1fr}}@media (max-width:680px){.featured-home-grid{grid-template-columns:1fr;gap:14px}.home-feature{min-height:269px;padding:25px}.home-feature h3{font-size:28px}.home-feature-series{font-size:17px}.home-feature>.orbit{opacity:.6;width:165px;right:-15px}.home-feature-math>.orbit{opacity:.7;width:190px;right:-12px}.home-feature-curriculum{min-height:265px}.home-feature-science{min-height:283px}.course-books{opacity:.65;transform-origin:100% 100%;right:-5px;transform:rotate(5deg)scale(.9)}.home-feature-admissions .home-feature-series{font-size:15px}.subject-map{grid-template-columns:1fr}}:root{--muted:#626c64;--blue:#e8eef3;--blue-ink:#3e5d74;--clay:#f0e5dc;--clay-ink:#835b44;--sage:#e5ede2;--sage-ink:#496747;--lilac:#ede8f1;--lilac-ink:#6b577b;--sand:#f1ecd9;--sand-ink:#73642e}.tone-blue{background:var(--blue);color:var(--blue-ink)}.tone-clay{background:var(--clay);color:var(--clay-ink)}.tone-sage{background:var(--sage);color:var(--sage-ink)}.tone-lilac{background:var(--lilac);color:var(--lilac-ink)}.home-feature-curriculum{background:var(--clay)}.home-feature-science{background:var(--blue)}.home-feature-admissions{background:var(--lilac)}.home-feature-science>.orbit{color:#658096}.home-feature-admissions>.orbit{color:#837393}.home-feature-curriculum .eyebrow,.home-feature-curriculum .feature-cta{color:var(--clay-ink)}.home-feature-science .eyebrow,.home-feature-science .feature-cta{color:var(--blue-ink)}.home-feature-admissions .eyebrow,.home-feature-admissions .feature-cta{color:var(--lilac-ink)}.category-grid>a:nth-child(2) .category-number{color:var(--blue-ink)}.category-grid>a:nth-child(3) .category-number{color:var(--clay-ink)}.teacher-banner{background:var(--clay)}.teacher-banner .eyebrow{color:var(--clay-ink)}.exam-tile,.subject-map article{border-top:3px solid var(--subject-ink)}.exam-tile,.subject-map article,[data-subject=数学]{--subject-bg:var(--sage);--subject-ink:var(--sage-ink)}[data-subject=物理]{--subject-bg:var(--blue);--subject-ink:var(--blue-ink)}[data-subject=化学]{--subject-bg:var(--clay);--subject-ink:var(--clay-ink)}[data-subject=生物]{--subject-bg:#e4eee8;--subject-ink:#356a59}[data-subject=天文],[data-subject=计算机],[data-subject=计算机科学],[data-subject=语言学]{--subject-bg:var(--lilac);--subject-ink:var(--lilac-ink)}[data-subject=中文],[data-subject=地理],[data-subject=经济与商科],[data-subject=英语]{--subject-bg:var(--sand);--subject-ink:var(--sand-ink)}.exam-tile .tile-meta>span:first-child{background:var(--subject-bg);color:var(--subject-ink);border-radius:3px;padding:3px 7px}.subject-map article{background:linear-gradient(var(--subject-bg) 0 82px,var(--white) 82px)}.subject-map article .eyebrow{color:var(--subject-ink)}.question-tags span:first-child{background:var(--blue);color:var(--blue-ink)}.question-tags span:last-child{background:var(--clay);color:var(--clay-ink)}.option-button.chosen{border-color:var(--blue-ink);color:var(--blue-ink)}.option-button.chosen,.report-summary{background:var(--blue)}.topic-report:nth-child(2n) .topic-meter>span{background:var(--clay-ink)}textarea{font:inherit;resize:vertical;border:1px solid var(--line);background:var(--white);width:100%;min-height:130px;color:var(--ink);border-radius:5px;padding:13px}textarea:focus-visible{outline:2px solid var(--green);outline-offset:3px}.signed-layout{grid-template-columns:172px minmax(0,1fr);gap:24px;min-height:75vh;padding-block:24px 48px;display:grid}.signed-sidebar{border-right:1px solid var(--line);flex-direction:column;align-items:flex-start;padding:0 18px 18px 0;display:flex}.profile-avatar{background:var(--clay);color:var(--clay-ink);border-radius:50%;place-items:center;width:32px;height:32px;margin-bottom:8px;display:grid}.profile-avatar svg{width:18px;height:18px}.signed-sidebar>strong{font-size:15px}.role-badge{border-radius:4px;margin-block:8px;padding:2px 9px;font-size:10px;font-style:normal;display:inline-block}.role-student{background:var(--sage);color:var(--sage-ink)}.role-teacher{background:var(--blue);color:var(--blue-ink)}.role-admin{background:var(--lilac);color:var(--lilac-ink)}.signed-sidebar nav{width:100%;margin-top:14px}.signed-sidebar nav a{border-radius:5px;justify-content:space-between;align-items:center;gap:10px;min-height:38px;margin-bottom:5px;margin-left:-10px;padding:9px 10px;font-size:13px;display:flex}.signed-sidebar nav a.selected{background:var(--blue);color:var(--blue-ink);font-weight:550}.signed-sidebar nav svg{width:14px;height:14px}.workspace-sidebar-note{color:var(--muted);margin-top:40px;margin-bottom:25px;font-size:11px;line-height:1.9}.signed-main{min-width:0}.signed-heading{margin:0 0 16px}.signed-heading h1{letter-spacing:-.02em;margin-block:0;font-size:22px;font-weight:550;line-height:1.35}.signed-heading .eyebrow{margin-bottom:5px;font-size:10px}.signed-heading>p:last-child{color:var(--muted);margin-top:5px;font-size:13px;line-height:1.6}.workspace-signout{margin-top:18px}.workspace-quick-actions{flex-wrap:wrap;gap:10px;margin-bottom:12px;display:flex}.signed-main .button-small{min-height:38px;padding:9px 14px}.workspace-panel{border:1px solid var(--line);background:var(--white);border-radius:7px;min-width:0;padding:16px}.study-target{border-top:1px solid var(--line);align-items:flex-start;gap:12px;padding:14px 0;display:flex}.study-target:first-child{border-top:0;padding-top:0}.study-target-content{flex:1;min-width:0}.study-target-title{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.study-target-title h3{font-size:16px;font-weight:550}.study-target-meta{color:var(--muted);overflow-wrap:anywhere;font-size:12px}.study-target nav{flex-wrap:wrap;gap:8px 18px;margin-top:8px;display:flex}.study-form{grid-template-columns:minmax(120px,1fr) minmax(180px,2fr) minmax(100px,1fr);align-items:end;gap:14px;display:grid}.study-form label{gap:6px;min-width:0;font-size:13px;display:grid}.study-form input,.study-form select{border:1px solid var(--line);background:var(--white);width:100%;min-width:0;min-height:38px;color:var(--ink);border-radius:4px;padding:8px 10px}.study-field-note{color:var(--muted);font-size:12px}.study-form button{justify-self:start}.study-notice{min-height:24px;color:var(--green);margin-top:10px;font-size:13px}.study-notice [role=alert]{color:#984e37}.study-empty{color:var(--muted);padding:12px 0;font-size:13px}.wrong-counts{color:var(--muted);flex-wrap:wrap;gap:8px 18px;margin:12px 0;font-size:12px;display:flex}.wrong-row{border-top:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:16px;padding:16px 0;display:flex}.wrong-row-content{min-width:0}.wrong-row-content>strong{overflow-wrap:anywhere;font-size:15px}.wrong-row-meta{color:var(--muted);flex-wrap:wrap;gap:6px 12px;margin-block:7px;font-size:12px;display:flex}.wrong-row-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.wrong-subject{border-radius:3px;padding:1px 6px}.wrong-practice-target,.wrong-unavailable{color:var(--muted);font-size:12px}.wrong-practice-target{margin-bottom:12px}@media (max-width:767px){.wrong-row{flex-direction:column;gap:10px}.wrong-row-actions{justify-content:flex-start}.study-form{grid-template-columns:1fr}.study-target .workspace-subject-badge{display:none}}.panel-heading{justify-content:space-between;align-items:center;gap:14px;margin-bottom:14px;display:flex}.panel-heading h2,.workspace-panel>h2{font-size:18px;font-weight:550}.panel-heading p{color:var(--muted);margin-top:5px;font-size:12px}.workspace-empty{text-align:center;color:var(--muted);padding:40px 10px;font-size:13px}.workspace-empty>svg{width:30px;height:30px;color:var(--blue-ink);margin:0 auto 15px}.workspace-empty h3{color:var(--ink);margin-block:6px;font-size:16px;font-weight:500}.workspace-empty p{margin-block:10px}.workspace-empty .text-link{margin-top:12px}.workspace-stats{flex-wrap:wrap;gap:8px;margin-block:12px;display:flex}.workspace-stats>*{border-radius:6px;flex:160px;align-items:center;gap:9px;min-width:0;padding:10px 12px;display:flex}.workspace-stats strong{font-size:18px;font-weight:500;line-height:1.5}.workspace-stats span{font-size:12px}.workspace-stats svg{flex-shrink:0;width:16px;height:16px}.workspace-stats>a:hover{transform:translateY(-2px)}.dashboard-hero{background:var(--sage);border:1px solid #d2dfce;border-radius:7px;grid-template-columns:1fr 190px;gap:20px;padding:30px 34px;display:grid;overflow:hidden}.soft-label{color:var(--sage-ink);align-items:center;gap:7px;font-size:11px;display:inline-flex}.soft-label svg{width:14px;height:14px}.dashboard-hero h2{max-width:410px;margin-block:13px;font-size:25px;font-weight:500;line-height:1.6}.dashboard-hero p{color:var(--muted);margin-bottom:22px;font-size:12px}.dashboard-geometry{align-self:center;position:relative}.dashboard-geometry i{border:1px solid #879e82;border-radius:50%;width:165px;height:165px;display:block;position:absolute;top:-20px;right:-10px}.dashboard-geometry i:nth-child(2){border-radius:0;width:150px;height:150px;top:-12px;right:0;transform:rotate(28deg)}.dashboard-geometry span{color:var(--sage-ink);padding-left:22px;font-family:Georgia,serif;font-size:24px;line-height:1.4;display:block;position:relative}.workspace-link-grid{grid-template-columns:repeat(3,1fr);gap:15px;display:grid}.workspace-subject-links{flex-wrap:wrap;gap:8px;display:flex}.workspace-subject-links>a{border:1px solid var(--line);border-radius:4px;align-items:center;gap:14px;min-height:38px;padding:8px 12px;font-size:13px;display:inline-flex}.workspace-subject-links svg{width:14px;height:14px}.workspace-subject-badge{border-radius:3px;align-items:center;width:fit-content;padding:2px 7px;font-size:11px;line-height:1.6;display:inline-flex}.workspace-link-grid .workspace-subject-badge{margin-right:6px}.workspace-link-grid>a{border-top:1px solid var(--line);align-items:flex-start;gap:12px;padding:18px 10px;display:flex}.workspace-link-grid strong{font-size:13px;font-weight:550}.workspace-link-grid p{color:var(--muted);margin-top:5px;font-size:11px}.workspace-link-grid>a>svg{width:15px;height:15px;margin-left:auto}.subject-mark{border-radius:4px;place-items:center;min-width:32px;height:35px;font-family:Georgia;font-size:19px;display:grid}.mark-math{background:var(--sage);color:var(--sage-ink)}.mark-physics{background:var(--blue);color:var(--blue-ink)}.mark-curriculum{background:var(--clay);color:var(--clay-ink)}.teacher-start-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}.teacher-start-actions{flex-wrap:wrap;gap:10px;margin-bottom:20px;display:flex}.teacher-start-actions .button{min-height:38px;padding:9px 14px;font-size:14px}.teacher-start{border-radius:7px;grid-template-columns:22px minmax(0,1fr);align-items:center;gap:5px 10px;padding:14px 16px;display:grid}.teacher-start>svg{width:20px;height:20px}.teacher-start h2{margin:0;font-size:18px;font-weight:500}.teacher-start p{font-size:13px;line-height:1.9}.teacher-start>span{grid-column:2;align-items:center;gap:15px;margin-top:0;font-size:12px;display:flex}.teacher-start:hover{transform:translateY(-2px)}.teacher-flow{grid-template-columns:repeat(4,1fr);gap:22px;margin:0;padding:0;list-style:none;display:grid}.teacher-flow li>span{color:var(--clay-ink);margin-bottom:14px;font-family:Georgia;font-size:27px;display:block}.teacher-flow strong{font-size:13px;font-weight:550}.teacher-flow p{color:var(--muted);margin-top:8px;font-size:11px}.integration-grid{grid-template-columns:repeat(2,1fr);gap:15px;display:grid}.integration-grid>div{border-radius:5px;padding:21px}.integration-grid h3{margin-bottom:17px;font-size:21px;font-weight:500}.integration-grid strong{font-size:12px;font-weight:500}.integration-grid p{margin-top:7px;font-size:11px}.account-table>div{border-bottom:1px solid var(--line);grid-template-columns:2fr 1fr 1fr;align-items:center;padding:12px 5px;font-size:12px;display:grid}.account-table>div:first-child{color:var(--muted);background:var(--soft);padding:10px;font-size:11px}.account-table small{color:var(--muted);margin-top:3px;display:block}.account-table strong{font-weight:500}.access-rules p{border-top:1px solid var(--line);padding-block:8px;font-size:12px;line-height:2}.status-chip{background:var(--sage);color:var(--sage-ink);white-space:nowrap;border-radius:4px;padding:3px 9px;font-size:10px;display:inline-block}.muted-chip{background:var(--soft);color:var(--muted)}.job-row{border-top:1px solid var(--line);overflow-wrap:anywhere;justify-content:space-between;align-items:center;gap:20px;padding-block:17px;font-size:13px;display:flex}.job-row p,.job-row small{color:var(--muted);font-size:11px}.learning-record-row>div:first-child{min-width:0}.learning-record-row strong{overflow-wrap:anywhere;display:block}.learning-record-actions{flex-shrink:0;align-items:center;gap:12px;display:flex}.learning-status-needs-review{background:var(--clay);color:var(--clay-ink)}.learning-status-self-review{background:var(--blue);color:var(--blue-ink)}.login-layout{grid-template-columns:1.1fr 1fr;align-items:start;gap:70px;padding-block:40px 60px;display:grid}.login-story{padding:30px 0;position:relative;overflow:hidden}.login-story h1{letter-spacing:-.5px;margin-block:0 16px;font-size:34px;font-weight:550;line-height:1.35}.login-story>p:not(.eyebrow){color:var(--muted);font-size:14px;line-height:2}.login-color-cards{z-index:1;gap:12px;margin-top:22px;display:flex;position:relative}.login-color-cards span{background:var(--sage);color:var(--sage-ink);border-radius:5px;padding:20px 17px;font-size:12px;display:inline-block}.login-color-cards span:nth-child(2){background:var(--blue);color:var(--blue-ink)}.login-color-cards span:nth-child(3){background:var(--clay);color:var(--clay-ink)}.login-orbit{opacity:.55;pointer-events:none;width:290px;height:230px;position:absolute;bottom:0;right:5px}.login-orbit span{border:1px solid #99abb6;border-radius:50%;width:250px;height:170px;position:absolute;top:10px;left:0;transform:rotate(-20deg)}.login-orbit span:nth-child(2){border-color:#b59c84;top:30px;left:25px;transform:rotate(35deg)}.login-orbit span:nth-child(3){border-color:#a9b49b;width:180px;height:180px;top:10px;left:65px;transform:rotate(0)}.login-panel{border:1px solid var(--line);background:var(--white);border-radius:8px;padding:36px 40px}.login-panel>h2{margin-block:10px;font-size:28px;font-weight:550}.login-panel>p:not(.eyebrow){color:var(--muted);font-size:12px}.login-form{margin-top:25px}.auth-switch{color:var(--muted);justify-content:center;gap:8px;margin-top:22px;font-size:14px;display:flex}.auth-switch a,.register-agreement a{color:var(--ink);text-underline-offset:3px;text-decoration:underline}.phone-field,.verification-field{align-items:center;gap:10px;display:flex}.phone-field>span{color:var(--muted);padding-inline:10px;font-size:14px}.phone-field input,.verification-field input{flex:1;min-width:0}.verification-send{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:5px;flex-shrink:0;min-height:45px;padding:0 12px;font-size:13px}.verification-send:disabled{color:var(--muted);cursor:not-allowed;opacity:.65}.register-agreement{color:var(--muted);align-items:flex-start;gap:9px;margin-top:18px;font-size:12px;line-height:1.8;display:flex}.register-agreement input{accent-color:var(--ink);margin-top:5px}.register-status{color:var(--green);margin-top:14px;font-size:13px}.login-form .button{width:100%;margin-top:12px}.login-panel .sidebar-note{margin-top:24px}.demo-roles{border-top:1px solid var(--line);margin-top:25px;padding-top:23px}.demo-roles p{color:var(--muted);font-size:11px}.demo-roles form{gap:9px;margin-top:13px;display:flex}.demo-role{border:0;border-radius:4px;padding:9px 12px;font-size:11px}.demo-student{background:var(--sage);color:var(--sage-ink)}.demo-teacher{background:var(--blue);color:var(--blue-ink)}.demo-admin{background:var(--lilac);color:var(--lilac-ink)}.demo-roles small{color:var(--muted);margin-top:12px;font-size:10px;display:block}.storage-hero{background:var(--blue);border:1px solid #d0dce5;border-radius:7px;justify-content:space-between;align-items:center;gap:25px;margin-bottom:24px;padding:27px 30px;display:flex}.storage-hero .soft-label{color:var(--blue-ink)}.storage-hero h2{margin-block:12px;font-size:23px;font-weight:500;line-height:1.5}.storage-hero p{color:var(--blue-ink);font-size:12px}.storage-devices{flex-shrink:0;align-items:center;gap:7px;display:flex}.storage-devices>span{background:var(--white);width:70px;height:90px;color:var(--blue-ink);border:1px solid #d0dce5;border-radius:5px;flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:9px;display:flex}.storage-devices>span:last-child{color:var(--clay-ink)}.storage-devices i{border-top:1px dashed #859aaa;width:13px}.storage-devices .storage-cloud{background:var(--sage);width:76px;height:76px;color:var(--sage-ink);border-radius:50%}.ai-tool-grid{grid-template-columns:minmax(0,1fr) 250px;gap:20px;display:grid}.file-tabs{gap:21px;margin-bottom:18px}.file-search,.file-tabs button{font-size:12px}.file-search{width:100%;margin-bottom:14px}.file-row{border-top:1px solid var(--line);align-items:center;gap:14px;padding-block:18px;font-size:12px;display:flex}.file-row>div{flex:1;min-width:0}.file-row strong{overflow-wrap:anywhere;font-weight:500;display:block}.file-row small{color:var(--muted);margin-top:4px;font-size:10px;display:block}.file-row .small-action{flex-shrink:0;gap:6px;font-size:11px}.file-row .small-action svg{width:15px;height:15px}.file-icon{border-radius:4px;flex-shrink:0;place-items:center;width:34px;height:39px;display:grid}.storage-summary>h2{margin-top:10px}.storage-number{color:var(--blue-ink);margin-top:27px;font-size:29px;font-weight:500}.storage-number small{color:var(--muted);font-size:11px}.storage-meter{background:var(--soft);border-radius:4px;height:5px;margin-block:13px 9px;overflow:hidden}.storage-meter>span{background:var(--blue-ink);height:100%;display:block}.storage-summary>p{color:var(--muted);font-size:10px}.storage-connection{border-top:1px solid var(--line);margin-top:24px;padding-top:19px}.storage-connection strong{align-items:center;gap:7px;margin-bottom:11px;font-size:13px;font-weight:500;display:flex}.storage-connection strong svg{width:17px;height:17px}.storage-connection p{color:var(--muted);margin-top:10px;font-size:11px;line-height:1.9}.storage-summary>.sidebar-note{margin-top:23px}.workspace-message{overflow-wrap:anywhere;margin-top:18px}.design-preview-links{flex-wrap:wrap;gap:18px;margin-bottom:28px;display:flex}.design-gallery section{margin-block:50px}.design-gallery img{border:1px solid var(--line);border-radius:6px;width:100%;height:auto}@media (max-width:1100px){.signed-layout{grid-template-columns:165px minmax(0,1fr);gap:25px}.signed-sidebar{padding-right:15px}.workspace-link-grid{grid-template-columns:1fr}.ai-tool-grid{grid-template-columns:minmax(0,1fr)}.storage-summary{grid-template-columns:1fr 1fr;gap:0 25px;display:grid}.storage-summary .eyebrow,.storage-summary .storage-meter,.storage-summary .storage-number,.storage-summary>h2,.storage-summary>p{grid-column:1}.storage-connection{grid-area:2/2/5;margin-top:0;margin-bottom:20px}.storage-connection+.storage-connection{grid-row:5/9}.login-layout{gap:40px}.login-panel{padding:30px}.storage-hero{display:block}.storage-devices{margin-top:25px}.signed-heading h1{font-size:26px}}@media (max-width:800px){.signed-layout{padding-top:20px;display:block}.signed-sidebar{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:28px minmax(0,1fr) auto auto;align-items:center;gap:0 8px;margin-bottom:16px;padding:0 0 15px;display:grid}.profile-avatar{grid-row:1;width:28px;height:28px;margin:0}.profile-avatar svg{width:18px;height:18px}.signed-sidebar>.role-badge{grid-area:1/3;justify-self:start;margin:0}.signed-sidebar>strong{white-space:nowrap;text-overflow:ellipsis;grid-area:1/2;min-width:0;overflow:hidden}.signed-sidebar>form{grid-area:1/4;margin:0}.signed-sidebar nav{scrollbar-width:thin;grid-column:1/-1;gap:8px;margin-top:10px;display:flex;overflow-x:auto}.signed-sidebar nav a{white-space:nowrap;margin:0;padding:9px 12px;font-size:12px}.signed-sidebar nav svg,.workspace-sidebar-note{display:none}.signed-heading h1{font-size:24px}.dashboard-hero{grid-template-columns:1fr 110px;padding:25px}.dashboard-geometry i{width:120px;height:120px}.dashboard-geometry i:nth-child(2){width:110px;height:110px}.dashboard-geometry span{font-size:19px}.dashboard-hero h2{font-size:23px}.teacher-flow{grid-template-columns:repeat(2,1fr)}.workspace-panel{padding:16px}.login-layout{grid-template-columns:1fr;gap:20px;padding-block:30px 60px}.login-story{padding-block:0 20px}.login-story h1{margin-block:0 12px;font-size:28px}.login-color-cards{margin-top:22px}.login-orbit{display:none}.login-panel{padding:27px}.login-story>p:not(.eyebrow){font-size:13px}.design-gallery .section-heading h2{font-size:22px}}@media (max-width:500px){.signed-heading h1{font-size:24px}.dashboard-hero{display:block}.dashboard-geometry{display:none}.teacher-start-grid{grid-template-columns:1fr}.teacher-start{padding:12px 14px}.teacher-start h2{font-size:18px}.integration-grid{grid-template-columns:1fr}.storage-summary{display:block}.storage-connection{margin-top:23px}.storage-hero{padding:23px}.storage-hero h2{font-size:21px}.workspace-panel{padding:14px}.panel-heading{align-items:flex-start;gap:10px}.panel-heading h2{font-size:18px}.panel-heading p{font-size:11px}.panel-heading .button-small{gap:7px;padding:10px 12px;font-size:11px}.panel-heading .text-link{gap:6px;font-size:11px}.file-tabs{gap:19px}.file-row{gap:10px}.file-row .small-action{gap:0;font-size:0}.file-row .small-action svg{width:19px;height:19px}.account-table>div{grid-template-columns:1.5fr .9fr .8fr}.account-table small{overflow-wrap:anywhere}.login-color-cards{gap:8px}.login-color-cards span{padding:15px 12px;font-size:11px}.demo-role{padding:9px 10px}.design-gallery .section-heading{display:block}.design-gallery .text-link{margin-top:10px}.signed-main .page-heading h1{font-size:20px}}@media print{.signed-heading,.signed-sidebar,.storage-hero,.workspace-stats{display:none!important}.signed-layout{width:100%;padding:0;display:block}.signed-main{width:100%}}.footer-bottom,.nav-legend,.status{color:var(--muted)}input::placeholder,textarea::placeholder{color:#6b746c}.login-help{color:var(--muted);margin-top:18px;font-size:12px}.login-help summary{cursor:pointer;width:fit-content}.login-help p{margin-top:8px;line-height:1.6}.exam-detail-facts{margin-top:16px;font-size:13px}.exam-detail-facts>div{gap:12px;display:flex}.exam-detail-facts dt{color:var(--muted);flex-shrink:0}.exam-detail-facts dd{margin:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@keyframes pulse{50%{opacity:.5}}