/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@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;--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}.relative{position:relative}.start{inset-inline-start:var(--spacing)}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.table{display:table}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}}:root{--ink:#12213a;--muted:#61708a;--indigo:#5267f7;--deep-indigo:#2536a8;--teal:#14b8a6;--sky:#38bdf8;--paper:#fff;--background:#f3f8ff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--background);color:var(--ink);margin:0;font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif}button{font:inherit}.container{width:min(1460px,100% - 48px);margin-inline:auto}.hero-shell{background:radial-gradient(circle at 76% 26%,#5267f71a,#0000 25%),radial-gradient(circle at 8% 78%,#38bdf81a,#0000 22%),linear-gradient(135deg,#fbfdff 0%,#edf5ff 70%,#f7fbff 100%);min-height:100vh;padding:14px 0 30px;position:relative;overflow:hidden}.hero-shell:before{content:"a² + b² = c²    ✦    ∑    ↗";color:#5267f724;letter-spacing:25px;font-size:22px;position:absolute;top:118px;right:3%;transform:rotate(-5deg)}.nav-wrap{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);z-index:10;background:#ffffffe6;border:1px solid #e4ebf6;border-radius:22px;align-items:center;gap:30px;width:min(1510px,100% - 28px);height:88px;margin:0 auto;padding:0 34px;display:flex;position:relative;box-shadow:0 10px 28px #22428217}.brand{color:var(--ink);cursor:pointer;white-space:nowrap;background:0 0;border:0;align-items:center;gap:14px;font-size:23px;font-weight:800;display:flex}.brand-mark{width:50px;height:44px;display:inline-block;position:relative}.brand-mark i{background:linear-gradient(145deg,#2447e9,#556aff);border-radius:4px 4px 16px 2px;width:25px;height:31px;position:absolute;bottom:2px;transform:skewY(9deg)}.brand-mark i:nth-child(2){right:0;transform:scaleX(-1)skewY(9deg)}.brand-mark b{color:#f5a800;font-size:19px;position:absolute;top:-9px;left:19px}.nav-links{align-items:center;gap:48px;height:100%;margin-left:auto;display:flex}.nav-links button{color:#26334c;cursor:pointer;background:0 0;border:0;height:100%;font-size:17px;font-weight:600;position:relative}.nav-links button:after{content:"";background:var(--indigo);border-radius:3px;height:3px;transition:all .25s;position:absolute;bottom:14px;left:50%;right:50%}.nav-links button:hover:after,.nav-links .active:after{left:15%;right:15%}.nav-links .active{color:#2844e7}.nav-progress,.nav-cta{cursor:pointer;border-radius:12px;padding:13px 24px;font-weight:700}.nav-progress{color:#31405b;background:#fff;border:1px solid #b8c5dc}.nav-cta{color:#fff;background:linear-gradient(135deg,#3857f0,#293cce);border:0;box-shadow:0 8px 20px #384edf3b}.hero{z-index:2;grid-template-columns:minmax(450px,.92fr) minmax(620px,1.08fr);align-items:center;gap:52px;min-height:720px;padding-top:60px;display:grid;position:relative}.hero-copy{padding-left:36px}.eyebrow{color:#2449e5;letter-spacing:1px;margin:0 0 24px;font-size:20px;font-weight:700}.hero h1{color:#0c1932;letter-spacing:-3px;margin:0;font-size:clamp(46px,4.4vw,72px);font-weight:900;line-height:1.22}.hero h1 span{white-space:nowrap;position:relative}.hero h1 span:after{content:"";clip-path:polygon(0 35%,100% 0,98% 66%,48% 45%,0 100%);background:#f5a800;border-radius:70% 30% 65%;height:10px;position:absolute;bottom:-16px;left:0;right:0;transform:rotate(-1deg)}.hero-description{color:var(--muted);margin:44px 0 30px;font-size:20px;line-height:1.8}.hero-actions{gap:18px;display:flex}.hero-actions button{cursor:pointer;border-radius:13px;min-width:190px;min-height:64px;font-size:18px;font-weight:700;transition:transform .2s,box-shadow .2s}.hero-actions button:hover{transform:translateY(-3px)}.primary-button{color:#fff;background:linear-gradient(135deg,#3659f4,#2f43d6);border:0;box-shadow:0 12px 26px #2f45d840}.primary-button span{color:#2946d4;background:#fff;border-radius:50%;place-items:center;width:30px;height:30px;margin-left:22px;display:inline-grid}.secondary-button{color:#334de1;background:#ffffffbd;border:1.5px solid #5368f4}.secondary-button span{margin-left:16px}.free-note{color:#71809a;margin:24px 0 0;font-size:15px}.free-note span{color:#5270a8;font-weight:700}.learning-panel{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffc7;border:1px solid #e2eaf7;border-radius:28px;padding:20px;box-shadow:0 18px 60px #314f8c1f}.panel-title{margin:0 0 15px;padding-left:8px;font-size:23px;font-weight:800}.panel-title span{color:#3156ee;margin-right:10px}.today-card{background:#ffffffb3;border:1px solid #dfe8f6;border-radius:18px;grid-template-columns:150px 1fr 98px;align-items:center;gap:24px;padding:20px;display:grid}.progress-ring{background:conic-gradient(#4965ed 0 68%,#e9eef8 68%);color:#101d39;border-radius:50%;place-items:center;width:128px;height:128px;display:grid;position:relative}.progress-ring:before{content:"";background:#fff;border-radius:50%;position:absolute;inset:12px}.progress-ring b,.progress-ring span,.progress-ring small{z-index:1;position:absolute}.progress-ring b{font-size:37px;top:34px;left:31px}.progress-ring span{font-weight:700;top:47px;right:21px}.progress-ring small{color:#73819a;bottom:25px}.today-topic{border-left:1px solid #dce5f3;padding-left:24px}.tiny-label{color:#3153e8;background:#edf1ff;border-radius:7px;padding:4px 10px;font-size:12px;font-weight:700;display:inline-block}.today-topic h2{margin:11px 0 13px;font-size:21px}.progress-line{background:#e8edfb;border-radius:10px;height:8px;overflow:hidden}.progress-line i{border-radius:inherit;background:linear-gradient(90deg,#4a5de3,#6c7df5);width:68%;height:100%;display:block}.today-topic p{color:#7b879c;margin:7px 0 13px;font-size:13px}.today-topic button{color:#3c55e5;cursor:pointer;background:#fff;border:1px solid #cdd8f5;border-radius:9px;padding:9px 18px;font-weight:700}.streak{background:linear-gradient(#ebf2ff,#f5f9ff);border-radius:14px;align-content:center;justify-items:center;min-height:135px;display:grid}.streak span{color:#6597f5;font-size:25px}.streak small{color:#5f6e88}.streak b{margin:6px 0;font-size:35px;line-height:1}.subject-row{grid-template-columns:repeat(4,1fr);gap:13px;margin-top:16px;display:grid}.subject-card{color:#fff;text-align:left;cursor:pointer;border:0;border-radius:18px;min-height:238px;padding:18px;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden;box-shadow:0 10px 20px #1b3a7d24}.subject-card:hover{transform:translateY(-5px);box-shadow:0 16px 30px #1b3a7d38}.subject-card:after{content:"";border:1px solid #ffffff57;border-radius:50%;width:130px;height:130px;position:absolute;bottom:38px;right:-54px}.physics{background:linear-gradient(145deg,#425df0,#313bd0)}.chemistry{background:linear-gradient(145deg,#2bc4bb,#10a896)}.math{background:linear-gradient(145deg,#28c0ed,#1499dd)}.geography{background:linear-gradient(145deg,#ffb347,#f27b50)}.subject-icon{color:#ffffffb8;font-size:65px;font-weight:300;position:absolute;top:66px;right:20px}.subject-name{font-size:27px;font-weight:800;display:block}.subject-detail{margin-top:3px;font-size:14px;display:block}.enter{color:#2949da;text-align:center;background:#ffffffed;border-radius:11px;padding:10px 12px;font-weight:700;position:absolute;bottom:14px;left:14px;right:14px}.enter b{float:right;color:#fff;background:currentColor;border-radius:50%;width:23px;height:23px;line-height:23px}.enter b:first-letter{color:#fff}.chemistry .enter{color:#109f94}.math .enter{color:#138fd1}.geography .enter{color:#e56e44}.feature-strip{z-index:4;background:#ffffffeb;border:1px solid #e5ecf7;border-radius:22px;grid-template-columns:repeat(3,1fr);min-height:114px;display:grid;position:relative;box-shadow:0 12px 30px #2d4b8214}.feature-strip>div{justify-content:center;align-items:center;gap:20px;display:flex;position:relative}.feature-strip>div+div:before{content:"";background:#d8e1ef;width:1px;height:52px;position:absolute;left:0}.feature-strip>div>span{color:#fff;background:#3b5ce9;border-radius:50%;place-items:center;width:48px;height:48px;font-size:22px;display:grid}.feature-strip>div:nth-child(2)>span{background:#18b6ad}.feature-strip>div:nth-child(3)>span{background:#5e9cf7}.feature-strip p{gap:5px;margin:0;display:grid}.feature-strip b{font-size:18px}.feature-strip small{color:#738099;font-size:14px}.section{padding-top:110px;padding-bottom:110px}.section-heading{text-align:center;max-width:720px;margin:0 auto 44px}.section-heading.compact{margin-bottom:38px}.section-kicker{text-transform:uppercase;letter-spacing:3px;font-weight:800;color:#3c59e8!important;margin:0 0 14px!important;font-size:14px!important}.section-heading h2,.plan-copy h2,.quiz-content h2,.main-mistake h2{letter-spacing:-1.5px;margin:0;font-size:clamp(32px,3.5vw,50px);line-height:1.25}.section-heading>p:last-child{color:var(--muted);font-size:17px;line-height:1.7}.course-section{background:#fff}.subject-tabs{justify-content:center;gap:12px;margin-bottom:28px;display:flex}.subject-tabs button{color:#526079;cursor:pointer;background:#fff;border:1px solid #dce5f2;border-radius:12px;min-width:112px;padding:13px 25px;font-weight:700;transition:all .2s}.subject-tabs button.selected{color:#fff;background:var(--tab-color);border-color:var(--tab-color);box-shadow:0 8px 20px var(--tab-color)}@supports (color:color-mix(in lab, red, red)){.subject-tabs button.selected{box-shadow:0 8px 20px color-mix(in srgb,var(--tab-color) 24%,transparent)}}.course-grid{grid-template-columns:1fr 340px;gap:24px;max-width:1160px;margin:0 auto;display:grid}.chapter-panel,.route-card{background:#f7faff;border:1px solid #e1e9f5;border-radius:24px}.chapter-panel{padding:30px}.chapter-intro{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.chapter-intro span{color:#63718a;font-size:13px}.chapter-intro h3{margin:6px 0 0;font-size:24px}.chapter-intro>b{color:#fff;border-radius:10px;padding:11px 16px;font-size:13px}.chapter-list{grid-template-columns:repeat(2,1fr);gap:13px;display:grid}.chapter-card{min-height:116px;color:var(--ink);text-align:left;cursor:pointer;background:#fff;border:1px solid #e0e8f4;border-radius:15px;grid-template-columns:42px 1fr 24px;align-items:center;gap:10px;padding:18px;transition:all .2s;display:grid}.chapter-card:hover{border-color:#8998f7;transform:translateY(-2px);box-shadow:0 10px 22px #28417814}.chapter-number{color:#8794ab;font-size:18px;font-weight:800}.chapter-card>span:nth-child(2){gap:4px;display:grid}.chapter-card small{color:#6b7b97}.chapter-card b{font-size:17px}.chapter-card em{color:#78869e;font-size:12px;font-style:normal}.chapter-card i{color:#5368ef;font-style:normal}.route-card{color:#fff;background:linear-gradient(160deg,#1d2d5a,#17233f);padding:30px}.route-badge{color:#bfc9ff;background:#6c7ff529;border:1px solid #9ba9ff33;border-radius:8px;padding:5px 10px;font-size:12px;display:inline-block}.route-card h3{margin:14px 0 25px;font-size:25px}.route-step{opacity:.55;align-items:center;gap:13px;display:flex}.route-step>b{border:1px solid #6e7b9b;border-radius:50%;flex:0 0 34px;place-items:center;width:34px;height:34px;display:grid}.route-step span{gap:3px;display:grid}.route-step small{color:#a9b4ca}.route-step.done,.route-step.current{opacity:1}.route-step.done>b{background:#17b7a8;border-color:#17b7a8}.route-step.current>b{background:#5367f0;border-color:#7f8eff;box-shadow:0 0 0 5px #5367f024}.route-line{background:#5b6783;width:1px;height:26px;margin:5px 0 5px 16px}.route-line.done{background:#17b7a8}.route-card>button{color:#2b46dd;cursor:pointer;background:#fff;border:0;border-radius:10px;width:100%;margin-top:25px;padding:13px;font-weight:800}.methods-section{background:linear-gradient(#f4f8ff,#edf4ff)}.method-grid{grid-template-columns:repeat(3,1fr);gap:22px;display:grid}.method-grid article{background:#ffffffe0;border:1px solid #e0e8f5;border-radius:22px;min-height:250px;padding:34px;position:relative;overflow:hidden}.method-grid article>span{color:#dce3ff;font-size:58px;font-weight:900;position:absolute;top:11px;right:22px}.method-grid article>b{margin-top:70px;font-size:23px;display:block}.method-grid article>p{color:#64738c;margin-bottom:0;line-height:1.8}.plan-section{grid-template-columns:.8fr 1.2fr;align-items:center;gap:80px;display:grid}.plan-copy>p:not(.section-kicker){color:var(--muted);max-width:500px;font-size:16px;line-height:1.8}.plan-progress{background:#e8edf8;border-radius:10px;width:min(430px,100%);height:10px;margin-top:28px;overflow:hidden}.plan-progress i{border-radius:inherit;background:linear-gradient(90deg,#5267f7,#14b8a6);height:100%;transition:width .3s;display:block}.plan-count{color:#526079;margin-top:10px;font-size:14px;display:block}.task-list{gap:14px;display:grid}.task{text-align:left;width:100%;min-height:104px;color:var(--ink);cursor:pointer;background:#fff;border:1px solid #dfe7f3;border-radius:17px;grid-template-columns:40px 1fr auto;align-items:center;gap:15px;padding:20px 22px;display:grid;box-shadow:0 8px 24px #1f37640f}.task .check{border:2px solid #bac6d9;border-radius:9px;place-items:center;width:30px;height:30px;display:grid}.task>span:nth-child(2){gap:5px;display:grid}.task small{color:#7a879c}.task em{color:#3e56de;background:#eef2ff;border-radius:9px;padding:7px 11px;font-size:12px;font-style:normal;font-weight:700}.task.done{background:#f7fffd;border-color:#bce7df}.task.done .check{color:#fff;background:#17b6a7;border-color:#17b6a7}.task.done em{color:#0c968b;background:#ddf7f2}.quiz-section{color:#fff;background:#1a284b}.quiz-card{grid-template-columns:230px 1fr;gap:55px;display:grid}.quiz-meta{border-right:1px solid #42506c;flex-direction:column;align-items:flex-start;gap:10px;display:flex}.quiz-meta span{color:#b9c5ff;background:#2c3c67;border-radius:8px;padding:6px 11px;font-size:12px}.quiz-meta b{margin-top:8px;font-size:22px}.quiz-meta small{color:#a6b2c7}.quiz-content h2{font-size:clamp(28px,3vw,42px)}.quiz-options{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px;display:grid}.quiz-options button{color:#fff;cursor:pointer;background:#223254;border:1px solid #53617c;border-radius:13px;justify-content:space-between;align-items:center;min-height:72px;padding:0 20px;font-weight:700;display:flex}.quiz-options button:hover{border-color:#8998f7}.quiz-options button.correct{background:#193f45;border-color:#23c4b4}.quiz-options button.wrong{background:#4c2d35;border-color:#ff8a70}.quiz-options button b{color:#69e1d6;font-size:12px}.quiz-options button.wrong b{color:#ffb2a2}.quiz-explain{color:#cfdaed;background:#ffffff0f;border-left:3px solid #40d1c2;border-radius:4px 10px 10px 4px;padding:14px 17px;line-height:1.7}.mistakes-section{grid-template-columns:1fr 1fr;gap:24px;display:grid}.mistake-card{border-radius:24px;padding:45px}.main-mistake{color:#fff;background:linear-gradient(145deg,#5367f4,#3549d6)}.mistake-label{color:#dce2ff;background:#ffffff1f;border-radius:8px;padding:6px 11px;font-size:12px;display:inline-block}.main-mistake h2{margin-top:20px;font-size:40px}.main-mistake p{color:#dce2ff;line-height:1.8}.main-mistake button{color:#334be0;cursor:pointer;background:#fff;border:0;border-radius:11px;padding:13px 18px;font-weight:800}.mistake-sample{background:#f5f8fd;border:1px solid #e0e8f4;align-content:center;gap:12px;display:grid}.mistake-sample>div{background:#fff;border:1px solid #e2e9f4;border-radius:14px;grid-template-columns:14px 1fr auto;align-items:center;gap:14px;padding:16px 18px;display:grid}.dot{background:#5267f7;border-radius:50%;width:10px;height:10px}.chemistry-dot{background:#14b8a6}.geo-dot{background:#f28a54}.mistake-sample p{gap:3px;margin:0;display:grid}.mistake-sample small{color:#7b889e}.mistake-sample em{color:#e06f55;background:#fff1ed;border-radius:8px;padding:6px 9px;font-size:12px;font-style:normal}footer{color:#d8e0ef;background:#101b33;padding:42px 0}footer>div{justify-content:space-between;align-items:center;gap:25px;display:flex}.footer-brand{align-items:center;gap:12px;display:flex}.footer-brand p{gap:3px;margin:0;display:grid}.footer-brand small{color:#8896ae}.footer-brand .brand-mark{transform:scale(.76)}.footer-brand .brand-mark i{background:#fff}.footer-brand .brand-mark b{color:#ffc048}footer>div>p{color:#8290a8}footer button{color:#d8e0ef;cursor:pointer;background:0 0;border:1px solid #44516a;border-radius:10px;padding:10px 14px}@media (width<=1180px){.nav-links{display:none}.nav-progress{margin-left:auto}.hero{grid-template-columns:1fr;padding-top:80px}.hero-copy{text-align:center;padding-left:0}.hero-actions{justify-content:center}.learning-panel{width:min(850px,100%);margin:0 auto}.course-grid{grid-template-columns:1fr}.route-card{max-width:none}.plan-section{gap:40px}}@media (width<=720px){.container{width:min(100% - 24px,1460px)}.hero-shell{padding-top:8px}.nav-wrap{border-radius:16px;gap:10px;width:calc(100% - 14px);height:66px;padding:0 14px}.brand{font-size:16px}.brand-mark{margin-left:-6px;transform:scale(.75)}.nav-progress{display:none}.nav-cta{padding:10px 13px;font-size:13px}.hero{grid-template-columns:1fr;gap:40px;min-height:auto;padding-top:64px}.hero h1{letter-spacing:-2px;font-size:40px}.hero-description{font-size:16px}.hero-description br{display:none}.hero-actions{flex-direction:column}.hero-actions button{width:100%;min-height:56px}.learning-panel{padding:12px}.today-card{grid-template-columns:100px 1fr;gap:12px;padding:14px}.progress-ring{width:94px;height:94px}.progress-ring b{font-size:29px;top:25px;left:21px}.progress-ring span{top:35px;right:14px}.progress-ring small{font-size:11px;bottom:17px}.today-topic{padding-left:12px}.streak{display:none}.subject-row{grid-template-columns:repeat(2,1fr)}.subject-card{min-height:200px}.feature-strip{grid-template-columns:1fr;margin-top:30px;padding:8px 0}.feature-strip>div{justify-content:flex-start;padding:18px 24px}.feature-strip>div+div:before{width:auto;height:1px;top:0;left:24px;right:24px}.section{padding-top:72px;padding-bottom:72px}.section-heading{margin-bottom:30px}.section-heading h2,.plan-copy h2,.main-mistake h2{font-size:32px}.subject-tabs{grid-template-columns:repeat(2,1fr);display:grid}.subject-tabs button{min-width:0}.chapter-panel{padding:18px}.chapter-intro{align-items:flex-start;gap:16px}.chapter-intro>b{display:none}.chapter-list,.method-grid{grid-template-columns:1fr}.method-grid article{min-height:210px}.plan-section{grid-template-columns:1fr;gap:35px}.task{grid-template-columns:36px 1fr}.task em{display:none}.quiz-card{grid-template-columns:1fr;gap:28px}.quiz-meta{border-bottom:1px solid #42506c;border-right:0;padding-bottom:20px}.quiz-content h2 br{display:none}.quiz-options,.mistakes-section{grid-template-columns:1fr}.mistake-card{padding:28px}footer>div{text-align:center;flex-direction:column}.footer-brand{flex-direction:column}footer>div>p{margin:0}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}