/* Landing keeps the Smartisan palette and glass material.
   One document scroll; touch rows use native horizontal scrolling. */
@font-face { font-family: "Instrument Serif"; src: url(fonts/InstrumentSerif-Regular.ttf) format("truetype"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url(fonts/InstrumentSerif-Italic.ttf) format("truetype"); font-weight: 400; font-style: italic; font-display: swap; }
html[data-route="landing"] { scroll-padding-top: 72px; }
html[data-route="landing"] #app { max-width: none; padding: 0; }
html[data-route="landing"] .topnav { width: 100%; margin: 0; padding-inline: clamp(16px, 3vw, 32px); }
html[data-route="landing"] .topnav .brandmark { flex-shrink: 0; }
.l-nav { display: flex; min-width: 0; gap: 4px; margin-inline: clamp(8px, 1.5vw, 22px); align-items: center; overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: none; }
.l-nav::-webkit-scrollbar { display: none; }
.topnav .l-nav button { flex: 0 0 auto; min-height: 34px; padding: 6px 7px; border: 0; background: transparent; color: var(--sub); box-shadow: none; font-size: 12px; white-space: nowrap; }
.landing { --edge: clamp(16px, 3vw, 32px); position: relative; isolation: isolate; background: var(--bg); }
.landing .s-icon { width: 16px; height: 16px; flex-shrink: 0; }
.landing button, .landing input { touch-action: manipulation; }
.landing button:focus-visible, .landing a:focus-visible, .l-nav button:focus-visible, .l-row:focus-visible, .landing summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; }
.l-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.landing button.primary { border-radius: 999px; padding: 9px 20px; min-height: 40px; font-size: 14px; box-shadow: 0 2px 8px rgb(25 31 45 / .08); }
.l-screen, .l-foot { position: relative; z-index: 1; }
#light-canvas { position: fixed; inset: 0; z-index: 0; display: block; pointer-events: none; }
.l-hero { min-height: min(880px, calc(100svh - 48px)); display: flex; align-items: center; overflow: clip; }
#ascii-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; pointer-events: none; }
.l-hero-inner { position: relative; z-index: 1; width: 100%; padding: clamp(52px, 8vh, 100px) var(--edge) 28px; }
.l-hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 72px); align-items: center; }
.l-hero-left, .l-quizwrap { min-width: 0; }
.l-count { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; }
.l-exam-full { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.l-exam-full b { white-space: nowrap; font-size: 14px; font-weight: 600; letter-spacing: .04em; padding: 5px 13px; border-radius: 999px; background: var(--card); border: .8px solid var(--line); }
.l-exam-full i { font-style: normal; font-size: 13px; color: var(--sub); font-variant-numeric: tabular-nums; }
.l-count-units { display: flex; align-items: baseline; gap: clamp(10px, 1.3vw, 22px); }
.l-cu { display: flex; align-items: baseline; gap: 5px; }
.l-cu b { font-family: "Instrument Serif", var(--font-serif); font-size: clamp(54px, 6.6vw, 108px); line-height: .95; font-weight: 400; color: var(--ink); font-variant-numeric: tabular-nums; min-width: 1.8ch; text-align: center; }
.l-cu i { font-style: normal; font-size: clamp(13px, 1.4vw, 18px); color: var(--sub); }
.l-readyrow { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 34px; }
.landing .l-ready { font-size: clamp(28px, 2.8vw, 40px); color: var(--ink); margin: 0; line-height: 1.3; letter-spacing: .01em; }
.l-cta-main { position: relative; overflow: hidden; gap: 6px; }
.l-cta-main::after { content: ""; position: absolute; inset-block: 0; left: -60%; width: 46%; transform: skewX(-24deg); background: linear-gradient(90deg, transparent, rgb(255 255 255 / .3), transparent); animation: lshine 4s ease-in-out infinite; pointer-events: none; }
@keyframes lshine { 0%, 65% { left: -60%; } 90%, 100% { left: 115%; } }
.l-hero-note { margin: 22px 0 0; color: var(--sub); font-size: 14px; line-height: 1.9; }
.l-hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.l-hero-actions button { gap: 7px; padding: 8px 13px; border-radius: 999px; font-size: 12px; color: var(--ink); background: color-mix(in srgb, var(--card) 65%, transparent); }
.l-hero-actions button:active { background: var(--chip); }
.l-explore { display: flex; align-items: center; justify-content: center; min-height: 44px; gap: 8px; margin: 36px auto 0; border: 0; background: transparent; box-shadow: none; color: var(--sub); font-size: 12px; }

/* Required question material and options stay readable in full. */
.l-quizwrap { position: relative; }
.l-quizcard { position: relative; border-radius: 14px; background: var(--card); border: .8px solid var(--line); box-shadow: 0 16px 40px rgb(25 31 45 / .07); transition: transform .28s ease, opacity .28s ease; }
.l-quizcard.drawn { transform: translate(8%, -14px) rotate(3deg); opacity: 0; }
.l-quiz-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 13px 18px; border-bottom: .8px solid var(--line); font-size: 11px; color: var(--sub); }
.l-quiz-tag { color: var(--blue); font-weight: 600; font-size: 12px; }
.l-quiz-body { padding: 16px 18px; }
.l-quizcard .qstem, .l-quiz-mat { font-family: var(--font-serif); font-size: 16px; line-height: 1.8; color: var(--ink); overflow-wrap: anywhere; white-space: pre-line; }
.l-quizcard .qstem { margin: 0; }
.l-quiz-mat { margin: 0 0 16px; padding-bottom: 14px; border-bottom: .8px solid var(--line); font-size: 14px; }
.l-quiz-figs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.l-quiz-figs button { padding: 6px; max-width: 100%; background: #fff; }
.l-quiz-figs img { display: block; max-width: 100%; max-height: 180px; object-fit: contain; }
.l-quizcard .opts { margin-top: 14px; gap: 7px; }
.l-quizcard .opt { text-align: left; justify-content: flex-start; padding: 9px 12px; min-height: 44px; font-size: 14px; }
.l-quizcard .opt > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.l-quizcard .opt:disabled { opacity: 1; cursor: default; }
.l-quizcard .opt.dim { opacity: .55; }
.l-quiz-feedback { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 12px; font-size: 12px; color: var(--sub); }
.l-quiz-feedback > span { min-width: 0; }
.l-quiz-feedback .is-correct { color: var(--green); }
.l-quiz-feedback .is-incorrect { color: var(--red); }
.l-quiz-next { flex-shrink: 0; padding: 6px 14px; border-radius: 999px; font-size: 12px; background: var(--card); color: var(--ink); }
.l-quiz-followup { border-top: .8px solid var(--line); margin-top: 12px; padding-top: 12px; display: flex; justify-content: space-between; flex-wrap: wrap; align-items: center; gap: 4px 12px; font-size: 12px; color: var(--sub); }
.l-trial-note { margin: 12px 0 0; text-align: center; font-size: 11px; color: var(--sub); }
.l-quiz-empty { padding: 24px; min-height: 330px; }
.l-quiz-empty p { color: var(--sub); font-size: 14px; }
.l-quiz-skeleton { display: grid; gap: 10px; margin-top: 24px; }
.l-quiz-skeleton i { height: 44px; border-radius: 8px; background: var(--bg); }
.landing .l-text-button { border: 0; background: transparent; box-shadow: none; color: var(--blue); padding: 4px 0; gap: 4px; font-size: 12px; }

.l-kpscreen { padding: 72px 0 48px; border-top: .8px solid var(--line); overflow: clip; }
.l-section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin: 0 var(--edge) 24px; }
.l-eyebrow { margin: 0 0 10px; font-size: 12px; color: var(--sub); letter-spacing: .08em; }
.landing h2 { margin: 0; font-size: clamp(26px, 3.4vw, 44px); font-weight: 600; letter-spacing: -.02em; color: var(--ink); line-height: 1.35; }
.l-section-note { color: var(--sub); font-size: 13px; margin: 14px 0 0; line-height: 1.8; }
.l-section-next { display: flex; align-items: center; gap: 8px; min-height: 44px; margin: 28px 0 0 auto; padding: 6px 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; color: var(--sub); font-size: 12px; }
.l-section-next .s-icon { width: 14px; height: 14px; transition: translate .2s ease-out; }
.l-section-next:active { color: var(--ink); }
.l-kpscreen > .l-section-next { margin-right: var(--edge); }
.l-touch-hint { display: none; }
.l-topic-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin: 0 var(--edge) 22px; }
.l-topic-filters { display: flex; padding: 3px; gap: 2px; background: color-mix(in srgb, var(--line) 60%, transparent); border-radius: 8px; box-shadow: var(--s-inset-track); }
.l-topic-filters button { background: transparent; border: 0; box-shadow: none; padding: 5px 16px; font-size: 13px; min-height: 32px; color: var(--sub); }
.l-topic-filters button.on { background: var(--card); color: var(--blue); box-shadow: 0 1px 3px rgb(0 0 0 / .06); }
.l-topic-search { display: flex; align-items: center; gap: 8px; padding: 0 12px; min-width: 0; width: 300px; background: var(--card); border: .8px solid var(--line); border-radius: 8px; box-shadow: inset 0 2px 4px rgb(0 0 0 / .03); }
.l-topic-search:focus-within { border-color: var(--blue); }
.l-topic-search input { border: 0; background: transparent; box-shadow: none; width: 100%; min-width: 0; padding: 9px 0; font-size: 13px; }
.l-topic-search input::placeholder { color: var(--sub); }
.l-topic-count { font-size: 12px; color: var(--sub); margin-left: auto; font-variant-numeric: tabular-nums; }
.l-rows { display: grid; gap: 0; }
.l-row { overflow-x: auto; overflow-y: hidden; padding: 22px 0 26px; scrollbar-width: none; overscroll-behavior-x: contain; scroll-padding-inline: var(--edge); }
.l-row::-webkit-scrollbar { display: none; }
.l-row-track { display: flex; align-items: flex-start; padding-inline: var(--edge); width: max-content; min-width: 100%; }
.glass-card { --tint-rgb: 91 135 235; --ink-color: #24457f; --alpha: .12; --blur: 7px; position: relative; overflow: hidden; border-radius: 16px; color: var(--ink-color); background: transparent; border: .8px solid rgb(255 255 255 / .55); box-shadow: 0 10px 26px rgb(25 31 45 / .05); }
.glass-card__surface { position: absolute; z-index: 0; inset: 0; pointer-events: none; border-radius: inherit; background-color: rgb(var(--tint-rgb) / var(--alpha)); background-image: linear-gradient(135deg, rgb(255 255 255 / .18), transparent 44%, rgb(255 255 255 / .04)); -webkit-backdrop-filter: blur(var(--blur)) saturate(1.3); backdrop-filter: blur(var(--blur)) saturate(1.3); box-shadow: inset 0 1px 1px rgb(255 255 255 / .3), inset 0 -1px 1px rgb(255 255 255 / .12); }
.l-kp { --tilt: -1.6deg; --rise: 3px; display: block; z-index: 1; padding: 0; text-align: left; width: 260px; min-height: 136px; flex-shrink: 0; margin-right: -44px; transform: translateY(var(--rise)) rotate(var(--tilt)); transform-origin: 50% 85%; transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .2s; }
.l-kp:nth-child(3n+2) { --tilt: 1.5deg; --rise: -3px; }
.l-kp:nth-child(3n) { --tilt: -.6deg; --rise: 5px; }
.l-kp:last-child { margin-right: 0; }
.l-kp-body { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: space-between; min-height: inherit; padding: 18px; gap: 12px; }
.l-kp-body b { font-size: 15px; font-weight: 600; line-height: 1.5; padding-right: 34px; }
.l-kp-body > span { font-size: 12px; opacity: .8; font-variant-numeric: tabular-nums; }
html[data-theme] .l-kp[aria-pressed="true"], html[data-theme] .l-kp:active { z-index: 3; background: color-mix(in srgb, rgb(var(--tint-rgb)) 85%, #283344); color: #fff; transform: translateY(-8px) rotate(0); box-shadow: 0 12px 26px rgb(25 31 45 / .09), 0 0 0 1.5px rgb(var(--tint-rgb) / .65); }
.l-kp:focus-visible { z-index: 5; transform: translateY(-10px) rotate(0); }
.l-kp-check { position: absolute; z-index: 2; right: 12px; bottom: 16px; color: currentColor; }
.l-kp-selection { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 22px var(--edge) 0; padding-top: 18px; border-top: .8px solid var(--line); min-height: 74px; }
.l-kp-selection > span { color: var(--sub); font-size: 13px; }
.l-kp-selection > div { display: grid; gap: 4px; }
.l-kp-selection b { font-size: 14px; font-weight: 600; }
.l-kp-selection div span { font-size: 12px; color: var(--sub); }
.l-kp-selection button { flex-shrink: 0; gap: 4px; }
.l-topic-empty { min-height: 220px; padding: 36px var(--edge); display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--sub); font-size: 14px; text-align: center; }
.l-topic-empty p { margin: 12px 0; }
@media (hover: hover) and (pointer: fine) and (min-width: 981px) {
  .l-rows { --stack-columns: 7; display: grid; grid-template-columns: repeat(var(--stack-columns), minmax(0, 1fr)); gap: 4px 0; padding: 22px calc(var(--edge) + 24px) 30px var(--edge); }
  .l-row, .l-row-track { display: contents; }
  .l-kp, .l-kp:last-child { width: calc(100% + 24px); min-height: 118px; margin: 0 0 -14px; }
  .l-kp-body { padding: 16px; }
  .l-kp-body b { font-size: 14px; padding-right: 14px; }
  .l-kp-body > span { font-size: 11px; }
  html[data-theme] .l-kp:hover { z-index: 4; background: color-mix(in srgb, rgb(var(--tint-rgb)) 85%, #283344); color: #fff; transform: translateY(-10px) rotate(0); box-shadow: 0 14px 30px rgb(25 31 45 / .1); }
}
@media (hover: hover) and (pointer: fine) and (min-width: 981px) and (max-width: 1279px) {
  .l-rows { --stack-columns: 5; }
}

.l-sec { padding: 72px var(--edge); border-top: .8px solid var(--line); }
.l-sec .l-section-head { margin-inline: 0; }
.l-source-link { display: inline-block; font-size: 11px; line-height: 1.9; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--blue) 35%, transparent); text-underline-offset: 4px; }
.l-source-link:active { color: var(--ink); }

/* A short exam guide, with the same paper and controls as the practice app. */
.l-mba { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(48px, 9vw, 144px); padding-block: 88px; align-items: start; }
.l-mba > .l-section-next { grid-column: 1 / -1; margin-top: 0; }
.l-mba:has(> .l-section-next) { row-gap: 28px; }
.l-mba-intro, .l-mba-exam { min-width: 0; }
.l-mba-name { margin: 36px 0 24px; }
.l-mba-name > span { display: block; font: 400 clamp(92px, 11vw, 156px)/.95 "Instrument Serif", var(--font-serif); letter-spacing: -.035em; color: var(--blue); text-shadow: 0 2px 0 rgb(255 255 255 / .4); }
.l-mba-name > p { margin: 12px 0 0; font: 400 16px/1.5 "Instrument Serif", var(--font-serif); color: var(--sub); letter-spacing: .015em; }
.l-mba-intro > h3 { font-size: 19px; font-weight: 600; margin: 0 0 12px; }
.l-mba-description { color: var(--sub); font-size: 14px; line-height: 2; max-width: 440px; margin: 0 0 22px; }
.l-mba-exam-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin: 0 0 20px; }
.l-mba-exam-head h3 { margin: 0; font-size: 17px; font-weight: 600; }
.l-mba-exam-head > span { color: var(--sub); font-size: 12px; white-space: nowrap; }
.l-mba-subject { padding: 24px 26px; background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 94%, var(--bg))); border: .8px solid var(--line); border-radius: 10px; box-shadow: var(--s-shadow-card); }
.l-mba-subject + .l-mba-subject { margin-top: 16px; }
.l-mba-subject-title, .l-mba-subject-title > div { display: flex; align-items: center; gap: 12px; }
.l-mba-subject-title { justify-content: space-between; }
.l-mba-code { font-size: 11px; font-variant-numeric: tabular-nums; padding: 3px 7px; border: .8px solid color-mix(in srgb, var(--blue) 25%, var(--line)); border-radius: 4px; color: var(--blue); background: var(--chip); }
.l-mba-subject h4 { font-size: 17px; margin: 0; font-weight: 600; }
.l-mba-subject-title > p { display: flex; align-items: baseline; gap: 5px; margin: 0; }
.l-mba-subject-title b { font: 400 40px/1 "Instrument Serif", var(--font-serif); }
.l-mba-subject-title p > span { font-size: 11px; color: var(--sub); }
.l-mba-subject > p { margin: 16px 0 20px; color: var(--sub); font-size: 12px; line-height: 1.85; }
.l-mba-scores { --s-white: var(--card); --s-border-list: var(--line); --s-title-list: var(--ink); --s-subtitle-list: var(--sub); --s-divider-color: color-mix(in srgb, var(--line) 60%, var(--card)); }
.l-mba-scores .s-list-item__detail { font-variant-numeric: tabular-nums; }
.l-mba-scope { display: block; padding-top: 14px; border-top: .8px solid var(--line); color: var(--sub); font-size: 11px; }
.l-mba-admission { font-size: 11px; line-height: 1.95; color: var(--sub); margin: 22px 0 8px; }

.l-modes { padding-block: 88px; }
.l-modes .l-section-head { margin-bottom: 36px; }
.l-modes-layout { display: grid; grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr); align-items: start; gap: clamp(32px, 6vw, 88px); }
.l-mode-choices { border: .8px solid var(--line); border-radius: 10px; background: var(--card); box-shadow: var(--s-shadow-card); padding: 0; margin: 0; min-width: 0; }
.l-mode-choice { position: relative; display: flex; align-items: center; gap: 16px; min-height: 104px; padding: 22px 24px; cursor: pointer; background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 97%, var(--bg))); }
.l-mode-choice:first-of-type { border-radius: 10px 10px 0 0; }
.l-mode-choice:last-child { border-radius: 0 0 10px 10px; }
.l-mode-choice + .l-mode-choice { border-top: .8px solid var(--line); }
.l-mode-choice.on { background: linear-gradient(180deg, color-mix(in srgb, var(--blue) 8%, var(--card)), color-mix(in srgb, var(--blue) 4%, var(--card))); }
.l-mode-choice:active { background: var(--chip); }
.l-mode-choice input, .l-distribution-switch input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; margin: 0; cursor: pointer; }
.l-mode-choice:has(input:focus-visible), .l-distribution-switch label:has(input:focus-visible) { outline: 2px solid var(--blue); outline-offset: 4px; z-index: 1; }
.l-mode-icon { display: grid; place-items: center; width: 38px; height: 38px; border: .8px solid var(--line); border-radius: 8px; background: linear-gradient(180deg, var(--card), var(--bg)); box-shadow: 0 2px 3px rgb(0 0 0 / .03); flex-shrink: 0; }
.l-mode-icon .s-icon { color: var(--sub); width: 19px; height: 19px; }
.l-mode-choice.on .l-mode-icon .s-icon { color: var(--blue); }
.l-mode-label { display: grid; gap: 7px; min-width: 0; }
.l-mode-label b { font-size: 16px; font-weight: 600; color: var(--ink); }
.l-mode-label small { font-size: 11px; color: var(--sub); line-height: 1.7; }
.l-radio-indicator { position: relative; width: 20px; height: 20px; flex-shrink: 0; margin-left: auto; border-radius: 50%; background: color-mix(in srgb, var(--line) 70%, var(--card)); box-shadow: inset 0 2px 3px rgb(0 0 0 / .07); }
.l-mode-choice.on .l-radio-indicator::after { content: ""; position: absolute; inset: 5px; border-radius: 50%; background: var(--s-grad-primary); border: .5px solid var(--blue); box-shadow: 0 1px 2px rgb(0 0 0 / .1); }
.l-mode-preview { background: var(--card); border: .8px solid var(--line); border-radius: 12px; box-shadow: 0 16px 36px rgb(25 31 45 / .05); min-width: 0; }
.l-mode-preview-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 15px 24px; border-bottom: .8px solid var(--line); background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 96%, var(--bg))); border-radius: 12px 12px 0 0; }
.l-mode-preview-head > span { display: flex; align-items: center; gap: 9px; font-size: 12px; color: var(--ink); }
.l-mode-preview-head .s-icon { color: var(--sub); }
.l-mode-preview-head small { font-size: 10px; color: var(--sub); }
.l-mode-preview-body { padding: 30px; }
.l-mode-demo { min-height: 230px; display: grid; align-items: center; margin-bottom: 30px; padding: 22px; background: color-mix(in srgb, var(--card) 36%, var(--bg)); border: .8px solid var(--line); border-radius: 8px; box-shadow: inset 0 2px 6px rgb(0 0 0 / .025); }
.l-mode-paper-list > div { display: flex; align-items: center; gap: 20px; padding: 18px 0; }
.l-mode-paper-list > div + div { border-top: .8px solid var(--line); }
.l-mode-year { font: 400 36px/1 "Instrument Serif", var(--font-serif); color: var(--blue); }
.l-mode-paper-list > div > span:nth-child(2) { display: grid; gap: 3px; }
.l-mode-paper-list b { font-size: 13px; font-weight: 500; }
.l-mode-paper-list small { font-size: 10px; color: var(--sub); }
.l-mode-paper-count { margin-left: auto; font-size: 11px; color: var(--sub); white-space: nowrap; }
.l-mode-paper-list .s-icon { width: 12px; height: 12px; color: var(--sub); }
.l-mode-description h3 { margin: 0 0 12px; color: var(--ink); font-size: 21px; font-weight: 600; line-height: 1.5; }
.l-mode-description p { color: var(--sub); font-size: 13px; line-height: 1.95; margin: 0; max-width: 520px; min-height: 52px; }
.landing .l-mode-start { margin-top: 24px; gap: 6px; }
.l-mode-demo-caption { color: var(--sub); font-size: 11px; line-height: 1.8; }
.l-mode-demo-chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 30px; }
.l-mode-demo-chips > span { padding: 7px 10px; display: flex; align-items: center; gap: 12px; font-size: 12px; border: .8px solid var(--line); border-radius: 6px; background: var(--card); }
.l-mode-demo-chips > span:first-child { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 45%, var(--line)); background: var(--chip); }
.l-mode-demo-chips .s-icon { width: 12px; height: 12px; color: var(--blue); }
.l-mode-kp-path { display: flex; align-items: center; justify-content: center; gap: 14px; color: var(--sub); font-size: 11px; }
.l-mode-kp-path > i { height: 1px; width: 28px; background: var(--line); }
.l-mode-kp-path b { border: .8px solid var(--line); border-radius: 50%; display: grid; place-items: center; width: 58px; height: 58px; font-size: 14px; font-weight: 500; color: var(--blue); background: var(--card); }
.l-mode-wrong-demo > div:first-child { display: grid; gap: 12px; }
.l-mode-wrong-demo b { font-size: 17px; font-weight: 500; }
.l-mode-wrong-tag { justify-self: start; padding: 3px 8px; border: .8px solid color-mix(in srgb, var(--orange) 25%, var(--line)); border-radius: 4px; background: color-mix(in srgb, var(--orange) 8%, var(--card)); color: var(--orange); font-size: 11px; }
.l-mode-review-track { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 30px; }
.l-mode-review-track > span { display: grid; justify-items: center; gap: 10px; color: var(--sub); font-size: 11px; white-space: nowrap; }
.l-mode-review-track > span::before { content: ""; width: 9px; height: 9px; border-radius: 50%; border: .8px solid var(--line); background: var(--card); }
.l-mode-review-track > .done::before { border-color: var(--green); background: var(--green); }
.l-mode-review-track > .current::before { border-color: var(--blue); background: var(--blue); box-shadow: 0 0 0 4px color-mix(in srgb, var(--blue) 12%, transparent); }
.l-mode-review-track > i { flex: 1; height: 1px; background: var(--line); margin-bottom: 26px; }
.l-mode-mock-demo { display: grid; grid-template-columns: minmax(0, 1fr) minmax(140px, 1fr); gap: 30px; align-items: center; }
.l-mode-clock { display: grid; gap: 10px; }
.l-mode-clock b { color: var(--blue); font: 400 clamp(38px, 4vw, 58px)/1 "Instrument Serif", var(--font-serif); font-variant-numeric: tabular-nums; white-space: nowrap; }
.l-mode-clock > span { color: var(--sub); font-size: 11px; }
.l-mode-answer-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; }
.l-mode-answer-grid > span { display: grid; place-items: center; aspect-ratio: 1; border-radius: 4px; border: .8px solid var(--line); background: var(--card); color: var(--sub); font-size: 10px; font-variant-numeric: tabular-nums; }
.l-mode-answer-grid .done { background: var(--chip); color: var(--blue); border-color: color-mix(in srgb, var(--blue) 25%, var(--line)); }
.l-mode-answer-grid .current { border-color: var(--blue); color: var(--blue); box-shadow: inset 0 0 0 .5px var(--blue); }

.l-model { padding-block: 88px; }
.l-model .l-section-head { margin-bottom: 40px; }
.l-model-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); align-items: start; gap: clamp(40px, 6vw, 96px); }
.l-distribution { min-width: 0; background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 96%, var(--bg))); border: .8px solid var(--line); border-radius: 12px; padding: 28px; box-shadow: var(--s-shadow-card); }
.l-distribution-head { display: flex; justify-content: space-between; align-items: start; gap: 16px; }
.l-distribution h3, .l-model-rules > h3 { margin: 0; font-size: 17px; font-weight: 600; line-height: 1.5; }
.l-distribution-head p { font-size: 11px; color: var(--sub); margin: 8px 0 0; line-height: 1.8; }
.l-distribution-switch { display: flex; gap: 2px; margin: 0; padding: 3px; border: .8px solid var(--line); border-radius: 6px; background: var(--bg); box-shadow: var(--s-inset-track); flex-shrink: 0; }
.l-distribution-switch label { position: relative; display: flex; align-items: center; justify-content: center; color: var(--sub); font-size: 12px; padding: 5px 14px; min-height: 32px; border-radius: 4px; cursor: pointer; }
.l-distribution-switch .on { color: var(--blue); background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 96%, var(--bg))); box-shadow: 0 1px 3px rgb(0 0 0 / .08); }
.l-distribution-chart { display: grid; gap: 18px; margin: 36px 0 32px; }
.l-distribution-row { display: grid; grid-template-columns: 38px minmax(0, 1fr) 32px; align-items: center; gap: 12px; }
.l-distribution-year, .l-distribution-row-total { font-size: 11px; font-variant-numeric: tabular-nums; color: var(--sub); }
.l-distribution-row-total { text-align: right; white-space: nowrap; }
.l-distribution-bar { display: flex; height: 30px; gap: 2px; border-radius: 4px; overflow: hidden; }
.l-distribution-segment { display: grid; place-items: center; font-size: 11px; color: #fff; font-variant-numeric: tabular-nums; text-shadow: 0 .5px 1px rgb(0 0 0 / .14); min-width: 0; }
.l-distribution-legend { list-style: none; padding: 0; margin: 0; display: grid; }
.l-distribution-legend li { display: grid; grid-template-columns: minmax(0, 1fr) 48px 76px; align-items: center; gap: 20px; min-height: 52px; border-top: .8px solid var(--line); }
.l-distribution-legend li > span:first-child { display: flex; align-items: center; gap: 10px; font-size: 12px; }
.l-distribution-legend i { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }
.l-distribution-total { color: var(--sub); font-size: 11px; text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.l-distribution-legend b { font: 400 30px/1 "Instrument Serif", var(--font-serif); text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }
.l-distribution-legend small { font: 11px var(--s-font); margin-left: 3px; color: var(--sub); }
.l-distribution-note { font-size: 10px; line-height: 1.9; color: var(--sub); border-top: .8px solid var(--line); padding-top: 18px; margin: 0; }
.l-model-rules { min-width: 0; padding-block: 4px; }
.l-model-rules > ol { list-style: none; margin: 28px 0 30px; padding: 0; display: grid; gap: 26px; }
.l-model-rules li { display: grid; grid-template-columns: 25px minmax(0, 1fr); gap: 16px; }
.l-model-rules li > span { font: 400 23px/1.4 "Instrument Serif", var(--font-serif); color: var(--blue); }
.l-model-rules h4 { font-size: 15px; font-weight: 600; margin: 0 0 7px; }
.l-model-rules li p { margin: 0; font-size: 12px; line-height: 1.95; color: var(--sub); }
.l-model-audit { border-block: .8px solid var(--line); padding: 18px 0; }
.l-model-audit b { font-size: 13px; font-weight: 500; }
.l-model-audit p, .l-model-note { color: var(--sub); font-size: 11px; line-height: 1.9; }
.l-model-audit p { margin: 6px 0 0; }
.l-model-note { margin: 18px 0 12px; }

.l-quality { padding-block: 88px; }
.l-quality .l-section-head { margin-bottom: 40px; }
.l-quality-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0 0 54px; padding: 28px 0 30px; border-block: .8px solid var(--line); }
.l-quality-stats > div { display: flex; flex-direction: column; gap: 8px; padding-left: 32px; border-left: .8px solid var(--line); }
.l-quality-stats > div:first-child { padding-left: 0; border-left: 0; }
.l-quality-stats dt { order: 1; color: var(--sub); font-size: 13px; }
.l-quality-stats dd { margin: 0; font: 400 clamp(48px, 5vw, 72px)/1 "Instrument Serif", var(--font-serif); color: var(--ink); }
.l-quality-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: start; gap: clamp(40px, 7vw, 108px); }
.l-quality-work { min-width: 0; }
.l-quality-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 30px; }
.l-quality-steps li { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 16px; }
.l-quality-steps li > span { font: 400 24px/1.4 "Instrument Serif", var(--font-serif); color: var(--blue); }
.l-quality-steps h3 { font-size: 17px; font-weight: 600; line-height: 1.6; margin: 0 0 8px; }
.l-quality-steps p { margin: 0; max-width: 440px; font-size: 14px; line-height: 1.95; color: var(--sub); }
.l-quality-progress { margin: 32px 0 0 46px; padding-top: 18px; border-top: .8px solid var(--line); max-width: 440px; font-size: 12px; line-height: 1.9; color: var(--sub); }
.l-quality-progress b { color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.l-proof-sheet { min-width: 0; background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 94%, var(--bg))); border: .8px solid var(--line); border-radius: 12px; box-shadow: var(--s-shadow-card); padding: 24px 28px 18px; }
.l-proof-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 20px; border-bottom: .8px solid var(--line); }
.l-proof-heading h3 { margin: 0; font-size: 16px; font-weight: 600; }
.l-proof-heading time { font-size: 11px; color: var(--sub); font-variant-numeric: tabular-nums; }
.l-proof-record { border-bottom: .8px solid var(--line); }
.l-proof-record summary { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 8px; list-style: none; padding: 21px 0; cursor: pointer; }
.l-proof-record summary::-webkit-details-marker { display: none; }
.l-proof-source { color: var(--sub); font-size: 11px; }
.l-proof-title { grid-column: 1 / -1; grid-row: 2; display: flex; justify-content: space-between; align-items: baseline; gap: 18px; font-size: 15px; font-weight: 500; line-height: 1.7; }
.l-proof-title .s-icon { align-self: center; color: var(--sub); transition: transform .2s; }
.l-proof-record[open] .l-proof-title .s-icon { transform: rotate(180deg); }
.l-proof-kind { grid-column: 2; grid-row: 1; color: var(--blue); font-size: 11px; }
.l-proof-detail { padding: 0 0 22px; }
.l-proof-detail p { margin: 0 0 12px; font-size: 13px; line-height: 1.9; color: var(--ink); }
.l-proof-detail > span, .l-proof-note { font-size: 11px; color: var(--sub); line-height: 1.8; }
.l-proof-note { margin: 16px 0 0; }
.l-tri { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; align-items: stretch; }
.l-tri-card { min-width: 0; display: flex; flex-direction: column; padding: clamp(20px, 2.2vw, 32px); border-radius: 20px; }
.l-tri-card > :not(.glass-card__surface) { position: relative; z-index: 1; }
.l-tri-visual { display: flex; flex-direction: column; justify-content: center; min-height: 236px; gap: 16px; }
.l-tri-card h3 { font-size: 24px; font-weight: 600; margin: 24px 0 10px; line-height: 1.4; }
.l-tri-card p { margin: 0 0 20px; font-size: 13px; line-height: 1.9; opacity: .85; }
.l-tri-nums { display: flex; justify-content: space-between; gap: 8px; }
.l-tri-nums b { display: block; font-family: "Instrument Serif", var(--font-serif); font-size: clamp(34px, 3.4vw, 52px); line-height: 1.15; font-weight: 400; }
.l-tri-nums span { font-size: 11px; opacity: .8; }
.l-years { display: flex; flex-wrap: wrap; gap: 6px; }
.l-years span { padding: 4px 8px; border-radius: 6px; background: rgb(255 255 255 / .26); border: .5px solid rgb(255 255 255 / .4); font-size: 10px; font-variant-numeric: tabular-nums; }
.l-demo-card { background: rgb(255 255 255 / .34); border: .8px solid rgb(255 255 255 / .38); border-radius: 10px; padding: 14px; }
.l-demo-card > b { font-size: 13px; }
.l-demo-tags { display: flex; align-items: center; gap: 8px; font-size: 11px; margin-top: 7px; }
.l-demo-card > small { opacity: .8; font-size: 11px; }
.l-stages { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 4px; margin: 18px 0 12px; }
.l-stages > span { display: flex; align-items: center; flex-direction: column; gap: 9px; }
.l-stages .future { opacity: .35; }
.l-stages small { font-size: 9px; white-space: nowrap; }
.l-dot { display: block; width: 9px; height: 9px; border-radius: 50%; box-shadow: 0 0 0 3px rgb(255 255 255 / .28); }
.l-example-label { font-size: 10px; opacity: .7; letter-spacing: .08em; }
.l-rep-score { display: flex; flex-direction: column; gap: 6px; }
.l-rep-score > b { font-family: "Instrument Serif", var(--font-serif); font-size: 56px; font-weight: 400; line-height: 1; }
.l-rep-score b span { font-family: var(--s-font); font-size: 12px; margin-left: 8px; opacity: .75; }
.l-rep-score > span { font-size: 11px; opacity: .8; }
.l-profile-bars { display: grid; gap: 12px; }
.l-profile-bars > div { display: grid; grid-template-columns: 72px minmax(0, 1fr) 30px; align-items: center; gap: 8px; font-size: 11px; }
.l-profile-bars i { height: 5px; border-radius: 4px; background: rgb(255 255 255 / .4); overflow: hidden; }
.l-profile-bars i b { display: block; height: 100%; border-radius: inherit; }
.l-feature-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: auto; }
.landing .l-feature-link { align-self: flex-start; gap: 6px; margin-top: auto; background: rgb(255 255 255 / .32); border: .8px solid rgb(255 255 255 / .4); border-radius: 999px; color: inherit; font-size: 12px; padding: 7px 14px; }
.l-feature-actions .l-feature-link { margin-top: 0; }
.l-faq-section { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); align-items: start; gap: clamp(36px, 6vw, 88px); padding-block: 88px; }
.l-faq { min-width: 0; border: .8px solid var(--line); border-radius: 10px; background: var(--card); box-shadow: var(--s-shadow-card); }
.l-faq details + details { border-top: .8px solid var(--line); }
.l-faq summary { display: grid; grid-template-columns: 32px minmax(0, 1fr) 24px; gap: 16px; align-items: center; min-height: 88px; padding: 20px 24px; cursor: pointer; font-size: 14px; line-height: 1.75; list-style: none; background: linear-gradient(180deg, var(--card), color-mix(in srgb, var(--card) 97%, var(--bg))); }
.l-faq details:first-child summary { border-radius: 10px 10px 0 0; }
.l-faq details:last-child:not([open]) summary { border-radius: 0 0 10px 10px; }
.l-faq summary::-webkit-details-marker { display: none; }
.l-faq-icon { display: grid; place-items: center; width: 32px; height: 32px; border: .8px solid var(--line); border-radius: 7px; box-shadow: inset 0 1px 0 color-mix(in srgb, var(--card) 70%, transparent), 0 2px 3px rgb(0 0 0 / .025); }
.l-faq-icon .s-icon { color: var(--sub); }
.l-faq-toggle { position: relative; display: block; width: 24px; height: 24px; border: .8px solid var(--line); border-radius: 50%; background: var(--bg); box-shadow: inset 0 1px 2px rgb(0 0 0 / .04); }
.l-faq-toggle::before, .l-faq-toggle::after { content: ""; position: absolute; left: 7px; top: 10px; width: 8px; height: 1px; background: var(--sub); }
.l-faq-toggle::after { transform: rotate(90deg); transition: transform .18s ease; }
.l-faq details[open] summary { color: var(--blue); background: color-mix(in srgb, var(--blue) 4%, var(--card)); }
.l-faq details[open] .l-faq-icon .s-icon { color: var(--blue); }
.l-faq details[open] .l-faq-toggle::after { transform: rotate(0); }
.l-faq summary:active { background: var(--chip); }
.l-faq-answer { padding: 0 64px 24px 72px; }
.l-faq-answer p { max-width: 640px; margin: 0; padding-top: 18px; border-top: .8px solid var(--line); color: var(--sub); font-size: 13px; line-height: 1.95; }
.l-foot { padding: 56px var(--edge) calc(24px + env(safe-area-inset-bottom)); border-top: .8px solid var(--line); color: var(--sub); background: color-mix(in srgb, var(--card) 45%, transparent); }
.l-foot-main { display: grid; grid-template-columns: minmax(0, 1fr) minmax(120px, .45fr) minmax(0, 1.2fr); gap: 40px; padding-bottom: 40px; }
.l-foot-wordmark { display: inline-flex; font: italic 400 38px/1.1 "Instrument Serif", var(--font-serif); letter-spacing: -.04em; }
.l-foot-wordmark i { font-style: inherit; }
.l-foot-brand p { font-size: 12px; margin: 14px 0 18px; }
.l-foot h3 { margin: 0 0 16px; color: var(--ink); font-size: 13px; font-weight: 600; }
.l-foot-nav { display: flex; flex-direction: column; align-items: flex-start; }
.l-foot-nav button { background: transparent; box-shadow: none; border: 0; padding: 6px 0; min-height: 36px; font-size: 12px; color: var(--sub); }
.l-foot-nav button:active { color: var(--blue); }
.l-foot-thanks > p { margin: 0 0 10px; font-size: 12px; line-height: 1.8; }
.l-foot-thanks > a { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 0; color: var(--ink); border-bottom: .8px solid var(--line); text-decoration: none; }
.l-foot-thanks a > span:first-child { display: grid; gap: 4px; }
.l-foot-thanks b { font-size: 13px; font-weight: 500; }
.l-foot-thanks small { font-size: 11px; color: var(--sub); }
.l-repo-link { font-size: 11px; color: var(--sub); white-space: nowrap; }
.l-foot-thanks a:hover b, .l-foot-thanks a:hover .l-repo-link { color: var(--blue); }
.l-foot-bottom { padding-top: 20px; border-top: .8px solid var(--line); }
.l-foot-credit, .l-foot-legal { margin: 0; font-size: 11px; line-height: 1.9; }
.l-foot-credit a { color: inherit; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--sub) 45%, transparent); text-underline-offset: 3px; }
.l-foot-legal { margin-top: 10px; }
.l-login-back { display: inline-block; margin-bottom: 18px; font-size: 13px; }
.l-login-intent { font-size: 13px; line-height: 1.8; padding: 12px; background: var(--bg); border-radius: 8px; margin: 0 0 18px; color: var(--sub); overflow-wrap: anywhere; }
.l-login-intent b { color: var(--ink); }

html[data-theme="dark"] .glass-card { color: #eaf0ff; border-color: rgb(255 255 255 / .16); background: transparent; }
html[data-theme="dark"] .glass-card__surface { background-image: linear-gradient(135deg, rgb(255 255 255 / .08), transparent 44%); box-shadow: inset 0 1px 1px rgb(255 255 255 / .16); }
html[data-theme="dark"] .l-demo-card, html[data-theme="dark"] .l-years span, html[data-theme="dark"] .l-feature-link { background: rgb(0 0 0 / .14); border-color: rgb(255 255 255 / .12); }
html[data-theme="dark"] .l-topic-filters button.on { background: var(--card); color: var(--blue); }

@media (max-width: 1100px) and (min-width: 981px) {
  .l-hero-actions { gap: 6px; }
  .l-hero-actions button { padding-inline: 10px; }
  .l-tri { gap: 14px; }
  .l-mode-choice { padding-inline: 18px; gap: 12px; }
  .l-mode-preview-body { padding: 24px; }
  .l-mode-mock-demo { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .l-mode-answer-grid { max-width: 220px; width: 100%; }
  .l-distribution { padding: 22px; }
  .l-distribution-head { flex-direction: column; gap: 18px; }
}
@media (max-width: 980px) {
  .l-hero { min-height: auto; }
  .l-hero-inner { padding-top: 40px; }
  .l-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; max-width: 620px; margin-inline: auto; }
  .l-cu b { font-size: clamp(56px, 10vw, 88px); }
  .l-count-units { gap: 18px; }
  .l-readyrow { margin-top: 24px; }
  .l-tri { grid-template-columns: minmax(0, 1fr); max-width: 620px; margin-inline: auto; }
  .l-tri-visual { min-height: 0; gap: 18px; }
  .l-tri-nums { justify-content: flex-start; gap: 34px; }
  .l-tri-nums b { font-size: 48px; }
  .l-tri-card h3 { margin-top: 24px; }
  .l-tri-card { padding: 26px; }
  .l-touch-hint { display: inline; }
  .l-mouse-hint { display: none; }
  .l-row { scroll-snap-type: x proximity; }
  .l-kp { scroll-snap-align: start; }
  .l-quality-layout { grid-template-columns: minmax(0, 1fr); gap: 40px; max-width: 620px; margin-inline: auto; }
  .l-quality-steps p, .l-quality-progress { max-width: none; }
  .l-mba, .l-modes-layout, .l-model-layout, .l-faq-section { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .l-mba-intro, .l-mba-exam, .l-modes-layout, .l-model-layout, .l-faq { width: 100%; max-width: 620px; margin-inline: auto; }
  .l-mba-description { max-width: 520px; }
  .l-mba-name > span { font-size: 112px; }
  .l-mode-choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .l-mode-choice { min-height: 100px; padding: 18px 20px; gap: 12px; }
  .l-mode-choice + .l-mode-choice { border-top: 0; }
  .l-mode-choice:nth-of-type(even) { border-left: .8px solid var(--line); }
  .l-mode-choice:nth-of-type(n+3) { border-top: .8px solid var(--line); }
  .l-mode-choice:first-of-type { border-radius: 10px 0 0 0; }
  .l-mode-choice:nth-of-type(2) { border-radius: 0 10px 0 0; }
  .l-mode-choice:nth-of-type(3) { border-radius: 0 0 0 10px; }
  .l-mode-choice:last-child { border-radius: 0 0 10px 0; }
  .l-mode-icon { display: none; }
  .l-model-rules { padding-top: 0; }
  .l-model-rules li p { font-size: 13px; }
  .l-foot-main { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px; }
  .l-foot-thanks { grid-column: 1 / -1; }
  .l-nav { margin-inline: 8px; }
}
@media (max-width: 600px) {
  .l-nav { display: none; }
  html[data-route="landing"] .topnav { gap: 4px; }
  html[data-route="landing"] .topnav a.chip { padding-inline: 10px; }
  .l-hero-inner { padding-top: 48px; padding-bottom: 38px; }
  .l-hero-grid { gap: 42px; }
  .l-count { gap: 26px; }
  .l-exam-full { gap: 10px; }
  .l-exam-full b { font-size: 12px; padding: 4px 10px; }
  .l-exam-full i { font-size: 11px; }
  .l-count-units { width: 100%; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
  .l-cu { gap: 4px; }
  .l-cu b { font-size: clamp(41px, 12vw, 60px); }
  .l-cu i { font-size: 11px; }
  .l-readyrow { flex-direction: column; align-items: flex-start; gap: 16px; margin-top: 34px; }
  .landing .l-ready { font-size: clamp(22px, 6vw, 30px); }
  .landing .l-cta-main { font-size: 12px; padding: 8px 12px; min-height: 40px; gap: 2px; }
  .l-hero-note { margin-top: 20px; font-size: 12px; line-height: 1.8; }
  .l-hero-note br { display: none; }
  .l-hero-actions { display: none; }
  .l-hero-actions button { min-height: 44px; padding: 6px 7px; gap: 5px; font-size: 11px; }
  .l-quiz-head { padding: 14px 16px; }
  .l-quiz-body { padding: 18px 16px 20px; }
  .l-quizcard .qstem { font-size: 16px; }
  .l-quizcard .opt { padding: 8px 10px; }
  .l-quiz-next { min-height: 44px; }
  .l-explore { margin-top: 28px; min-height: 44px; }
  .l-section-next { margin-top: 18px; font-size: 11px; }
  .l-kpscreen { padding-top: 38px; padding-bottom: 30px; }
  .l-section-head { align-items: flex-start; gap: 12px; margin-bottom: 20px; }
  .l-section-note { font-size: 12px; }
  .l-eyebrow { font-size: 11px; }
  .l-topic-tools { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; margin-bottom: 8px; }
  .l-topic-search { width: auto; grid-column: 1 / -1; grid-row: 2; min-height: 44px; }
  .l-topic-search input { font-size: 16px; }
  .l-topic-filters { justify-self: start; }
  .l-topic-filters button { min-height: 38px; padding-inline: 14px; }
  .l-topic-count { font-size: 11px; }
  .l-kp { width: 224px; min-height: 126px; margin-right: -32px; }
  .l-kp-body { padding: 16px; }
  .l-kp-body b { font-size: 14px; }
  .l-kp-body > span { font-size: 11px; }
  .l-row { padding-block: 20px; }
  .l-kp-selection { flex-wrap: wrap; gap: 10px; margin-top: 14px; }
  .l-kp-selection button { min-height: 44px; }
  .l-sec { padding-top: 38px; padding-bottom: 38px; }
  .l-quality { padding-block: 52px; }
  .l-quality .l-section-head { margin-bottom: 28px; }
  .l-quality-stats { margin-bottom: 34px; padding-block: 24px; gap: 12px; }
  .l-quality-stats > div { padding-left: 12px; gap: 10px; }
  .l-quality-stats dd { font-size: clamp(36px, 10vw, 46px); }
  .l-quality-stats dt { font-size: 11px; line-height: 1.8; max-width: 7em; }
  .l-quality-layout { gap: 34px; }
  .l-quality-steps { gap: 28px; }
  .l-quality-steps li { grid-template-columns: 24px minmax(0, 1fr); gap: 14px; }
  .l-quality-steps h3 { font-size: 16px; }
  .l-quality-steps p { font-size: 13px; }
  .l-quality-progress { margin-left: 38px; }
  .l-proof-sheet { padding: 20px 18px 18px; }
  .l-proof-title { font-size: 14px; gap: 10px; }
  .l-tri-card { padding: 22px; }
  .l-tri-nums { justify-content: space-between; gap: 12px; }
  .l-tri-nums b { font-size: 44px; }
  .landing .l-feature-link { min-height: 44px; }
  .l-mba, .l-modes, .l-model, .l-faq-section { padding-block: 56px; }
  .l-mba { gap: 38px; }
  .l-mba-name { margin-block: 30px 24px; }
  .l-mba-name > span { font-size: 104px; }
  .l-mba-name > p { font-size: 15px; }
  .l-mba-intro > h3 { font-size: 18px; }
  .l-mba-description { font-size: 13px; line-height: 2; margin-bottom: 18px; }
  .l-mba-exam-head { gap: 10px; }
  .l-mba-exam-head h3 { font-size: 16px; }
  .l-mba-exam-head > span { font-size: 11px; }
  .l-mba-subject { padding: 22px 18px; }
  .l-mba-subject-title { gap: 12px; }
  .l-mba-subject-title > div { align-items: flex-start; flex-direction: column; gap: 10px; }
  .l-mba-subject h4 { font-size: 16px; }
  .l-mba-subject-title b { font-size: 42px; }
  .l-mba-admission { margin-top: 24px; line-height: 2; }
  .l-source-link { font-size: 11px; line-height: 2; }
  .l-modes .l-section-head, .l-model .l-section-head { margin-bottom: 30px; }
  .l-modes-layout { gap: 24px; }
  .l-mode-choice { display: grid; grid-template-columns: minmax(0, 1fr) 18px; align-content: center; min-height: 96px; padding: 16px 14px; gap: 10px 8px; }
  .l-mode-label { display: contents; }
  .l-mode-label b { grid-column: 1; grid-row: 1; font-size: 14px; }
  .l-mode-label small { grid-column: 1 / -1; grid-row: 2; font-size: 10px; }
  .l-radio-indicator { grid-column: 2; grid-row: 1; width: 18px; height: 18px; }
  .l-mode-choice.on .l-radio-indicator::after { inset: 4px; }
  .l-mode-preview-head { padding: 14px 18px; }
  .l-mode-preview-body { padding: 22px 18px 24px; }
  .l-mode-demo { min-height: 222px; padding: 16px; margin-bottom: 26px; }
  .l-mode-paper-list > div { gap: 14px; padding-block: 18px; }
  .l-mode-year { font-size: 30px; }
  .l-mode-paper-list b { font-size: 11px; }
  .l-mode-paper-list small { font-size: 9px; }
  .l-mode-paper-count { font-size: 10px; }
  .l-mode-paper-list .s-icon { display: none; }
  .l-mode-description h3 { font-size: 18px; line-height: 1.6; margin-bottom: 14px; }
  .l-mode-description p { font-size: 12px; line-height: 2; min-height: 0; }
  .landing .l-mode-start { min-height: 44px; margin-top: 24px; font-size: 13px; }
  .l-mode-demo-chips { gap: 8px; margin-block: 18px 26px; }
  .l-mode-demo-chips > span { font-size: 11px; }
  .l-mode-kp-path { gap: 8px; font-size: 10px; }
  .l-mode-kp-path b { width: 48px; height: 48px; font-size: 12px; }
  .l-mode-kp-path > i { width: 12px; }
  .l-mode-wrong-demo b { font-size: 16px; }
  .l-mode-mock-demo { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .l-mode-clock { justify-items: center; }
  .l-mode-clock b { font-size: 48px; }
  .l-mode-answer-grid { width: 190px; max-width: 100%; justify-self: center; }
  .l-mode-answer-grid > span { aspect-ratio: auto; height: 24px; }
  .l-model-layout { gap: 38px; }
  .l-distribution { padding: 22px 18px 18px; }
  .l-distribution-head { flex-direction: column; gap: 20px; }
  .l-distribution h3, .l-model-rules > h3 { font-size: 16px; }
  .l-distribution-switch label { padding-inline: 22px; min-height: 38px; }
  .l-distribution-chart { margin-block: 28px; gap: 18px; }
  .l-distribution-row { grid-template-columns: 30px minmax(0, 1fr); gap: 10px; }
  .l-distribution-year { font-size: 10px; }
  .l-distribution-row-total { display: none; }
  .l-distribution-bar { height: 30px; }
  .l-distribution-segment { font-size: 10px; }
  .l-distribution-legend li { grid-template-columns: minmax(0, 1fr) 42px 65px; gap: 12px; min-height: 54px; }
  .l-distribution-legend b { font-size: 29px; }
  .l-distribution-legend li > span:first-child { font-size: 11px; gap: 8px; }
  .l-distribution-note { padding-top: 18px; }
  .l-model-rules > ol { margin-block: 26px 30px; gap: 28px; }
  .l-model-rules li { gap: 13px; }
  .l-model-rules li p { line-height: 2; }
  .l-model-audit { padding-block: 22px; }
  .l-model-note { line-height: 2; }
  .l-model-rules > .l-text-button { min-height: 44px; }
  .l-faq-section { gap: 30px; }
  .l-faq summary { min-height: 90px; grid-template-columns: 28px minmax(0, 1fr) 22px; gap: 12px; padding: 20px 16px; font-size: 13px; }
  .l-faq-icon { width: 28px; height: 28px; border-radius: 6px; }
  .l-faq-icon .s-icon { width: 14px; height: 14px; }
  .l-faq-toggle { width: 22px; height: 22px; }
  .l-faq-toggle::before, .l-faq-toggle::after { top: 9px; left: 6px; }
  .l-faq-answer { padding: 0 18px 24px; }
  .l-faq-answer p { padding-top: 18px; font-size: 12px; line-height: 2; }
  .l-foot { padding-top: 38px; }
  .l-foot-main { grid-template-columns: minmax(0, 1fr); gap: 30px; padding-bottom: 30px; }
  .l-foot-nav { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 4px 22px; }
  .l-foot-nav h3 { width: 100%; margin-bottom: 4px; }
  .l-foot-nav button { min-height: 44px; }
  .l-foot-thanks { grid-column: auto; }
  .l-foot-brand p { margin-block: 12px; }
  .l-foot-brand button { min-height: 44px; }
}
@media (hover: none), (pointer: coarse) {
  .l-touch-hint { display: inline; }
  .l-mouse-hint { display: none; }
}
@media (hover: hover) and (pointer: fine) {
  .l-section-next:hover, .l-explore:hover, .topnav .l-nav button:hover { color: var(--blue); }
  .l-section-next:hover .s-icon { translate: 0 2px; }
}

/* Elements remain readable unless the motion module successfully opts them in. */
.l-reveal-pending { opacity: 0; translate: 0 14px; }
@media (max-width: 600px) {
  .l-reveal-pending { translate: 0 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .l-cta-main::after { animation: none; }
  .l-quizcard, .l-kp, .l-faq-toggle::after { transition: none; }
  .l-section-next .s-icon { transition: none; }
  .l-reveal-pending { opacity: 1; translate: none; }
}

/* ==========================================================================
   会员对比（landing）
   原则：先说"不买也能用完"，再说会员买到了什么。
   不用灰底卡片：表格靠细线分隔，会员列用蓝色细线强调。
   ========================================================================== */
.l-member-sec .l-section-note { max-width: 62ch; }

.l-member-wrap {
  width: min(100%, 940px);
  margin: 0;
}

.l-mtable {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  background: transparent;
}
.l-mtable th, .l-mtable td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 0.5px solid var(--line);
  vertical-align: middle;
}
.l-mtable thead th {
  font-size: 12px;
  font-weight: 600;
  color: var(--sub);
  letter-spacing: .02em;
  padding-bottom: 10px;
}
.l-mtable thead th:nth-child(2),
.l-mtable thead th:nth-child(3),
.l-mtable tbody td:nth-child(2),
.l-mtable tbody td:nth-child(3) { width: 27%; text-align: center; }
.l-mtable tbody td:first-child { color: var(--ink); }
.l-mtable tbody tr:last-child td { border-bottom: 0; }
.l-mtable td.y { color: #2f9fa8; font-weight: 600; }
.l-mtable td.n { color: var(--sub); }
.l-mtable td.muted { color: var(--sub); font-size: 12.5px; }

/* 会员列：极细竖线强调，不做底色块 */
.l-mtable thead th:nth-child(3),
.l-mtable tbody td:nth-child(3) {
  border-left: 0.5px solid color-mix(in srgb, var(--blue) 35%, transparent);
  color: var(--ink);
}
.l-mtable thead th:nth-child(3) { color: var(--blue); }


.l-member-note {
  margin: 18px 0 0;
  max-width: 72ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--sub);
}
.l-member-note b { color: var(--ink); font-weight: 600; }


@media (max-width: 720px) {
  /* 窄屏把表格改成"块"：能力名独占一行，下面并排 免费/会员 两格。
     表格三列在 390px 上会把模型名挤成四行，块式更可读。 */
  .l-mtable { font-size: 12.5px; }
  .l-mtable thead { display: none; }
  .l-mtable tbody { display: block; }
  .l-mtable tr {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px 12px;
    padding: 11px 12px;
    border-bottom: 0.5px solid var(--line);
  }
  .l-mtable tbody tr:last-child { border-bottom: 0; }
  .l-mtable td {
    width: auto !important;
    padding: 0 !important;
    border: 0 !important;
    text-align: left !important;
  }
  .l-mtable td:nth-child(1) { grid-column: 1 / -1; font-weight: 600; color: var(--ink); }
  .l-mtable td:nth-child(2),
  .l-mtable td:nth-child(3) { display: flex; align-items: center; gap: 5px; }
  .l-mtable td:nth-child(2)::before { content: "免费"; flex: none; font-size: 11px; color: var(--sub); font-weight: 600; }
  .l-mtable td:nth-child(3)::before { content: "会员"; flex: none; font-size: 11px; color: var(--blue); font-weight: 600; }
  .l-mtable .l-dsmodel { font-size: 11.5px; gap: 3px; white-space: normal; }
  .l-mtable .l-ds-icon { width: 11px; height: 11px; }
}
}

.l-member-cta {
  display: inline-flex; align-items: center; gap: 4px;
  margin: 16px 0 0 14px;
  font-size: 13px; font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}
.l-member-cta .s-icon { width: 12px; height: 12px; }
.l-member-cta:hover { text-decoration: underline; }

/* ==========================================================================
   会员区两栏：左侧说清能力差异，右侧竖排五档（上对齐标题、下对齐表格底）
   ========================================================================== */
.l-member-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: stretch;
  margin-top: 24px;
}
.l-member-left { display: flex; flex-direction: column; min-width: 0; }
/* 表格不要被 flex 拉伸，否则多余高度会被浏览器摊到各行上，行高忽高忽低 */
.l-member-left .l-mtable { align-self: flex-start; }
.l-member-left .l-section-head { margin: 0 0 6px; }

/* 对比表：不用卡片，只靠细线与列对齐，像规格表而不是宣传块 */
.l-mtable {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin-top: 4px;
}
.l-mtable th, .l-mtable td {
  padding: 11px 12px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 0.5px solid var(--line);
}
.l-mtable thead th {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--sub);
  letter-spacing: .04em;
  padding-bottom: 9px;
  border-bottom: 0.5px solid var(--line);
}
.l-mtable th:nth-child(1), .l-mtable td:nth-child(1) { width: 40%; }
.l-mtable th:nth-child(2), .l-mtable td:nth-child(2) { width: 22%; text-align: center; }
/* 会员列最宽：要容纳「预置 DeepSeek-V4.1-Flash 1017」整行不折行 */
.l-mtable th:nth-child(3), .l-mtable td:nth-child(3) { width: 38%; text-align: center; }
.l-mtable tbody tr:last-child td { border-bottom: 0; }
.l-mtable tbody td:first-child { color: var(--ink); }
.l-mtable td.y { color: #2f9fa8; font-weight: 600; }
.l-mtable td.n { color: var(--sub); }
.l-mtable td.muted { color: var(--sub); font-size: 12.5px; }
/* 会员列：一条细竖线，不做色块 */
.l-mtable th:nth-child(3), .l-mtable td:nth-child(3) {
  border-left: 0.5px solid color-mix(in srgb, var(--blue) 32%, transparent);
}
.l-mtable th:nth-child(3) { color: var(--blue); }

/* DeepSeek 模型标识 */
.l-dsmodel { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; color: var(--ink); white-space: nowrap; }
.l-ds-icon { width: 13px; height: 13px; flex: none; fill: #4d6bfe; vertical-align: -2px; }
html[data-theme="dark"] .l-ds-icon { fill: #7d92ff; }

/* 右侧竖排五档：flex 撑满整列，首尾自然对齐左栏上下边界 */
.l-tierdeck {
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-height: 0;
}
.l-tier {
  flex: 1 1 0;
  min-height: 84px;
  position: relative;
  display: flex;
  align-items: center;
  transition: transform .28s cubic-bezier(.2,.9,.2,1), box-shadow .28s;
}
.l-tier:hover { transform: translateX(-4px); box-shadow: 0 12px 26px rgb(25 31 45 / .10); }
/* 卡内左右两栏：左「方案名 / 说明」竖排，右「金额」垂直居中；
   两端对齐后卡片不再左重右空 */
.l-tier__body {
  position: relative; z-index: 1;
  width: 100%; height: 100%;
  padding: 12px 16px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
}
.l-tier__text { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
/* 英文优先：代号是正名，与会员卡同一套处理（Instrument Serif 斜体、首字母大写） */
.l-tier__code {
  display: flex; align-items: center; gap: 7px;
  font-family: "Instrument Serif", var(--font-serif);
  font-style: italic; font-weight: 400;
  font-size: 24px; letter-spacing: .005em;
  text-transform: none; line-height: 1.1;
}
.l-tier__name { font-size: 10.5px; font-weight: 500; letter-spacing: .02em; opacity: .55; }
.l-tier__price {
  flex: none;
  font-family: "Instrument Serif", var(--font-serif);
  font-size: 30px; line-height: 1; font-weight: 400;
  letter-spacing: -.02em;
  font-variant-numeric: lining-nums;
  text-align: right;
}
.l-tier__meta { font-size: 11.5px; opacity: .72; line-height: 1.35; }
.l-tier__win { font-size: 10.5px; opacity: .55; line-height: 1.35; }
.l-tier__hot {
  display: inline-block; margin-left: 6px; padding: 1px 6px;
  font-size: 9.5px; font-style: normal; font-weight: 600; letter-spacing: .02em;
  border-radius: 100px; border: 0.5px solid currentColor; opacity: .8;
  vertical-align: 1px;
}

@media (max-width: 1080px) {
  .l-member-layout { grid-template-columns: minmax(0, 1fr) 280px; gap: 26px; }
}
@media (max-width: 860px) {
  .l-member-layout { grid-template-columns: 1fr; gap: 22px; }
  .l-tierdeck { flex-direction: row; flex-wrap: wrap; }
  .l-tier { flex: 1 1 calc(50% - 5px); min-height: 76px; }
  .l-tier:hover { transform: translateY(-4px); }
}
/* 窄屏：两列时价格挤压说明文字，改为单列整宽 */
@media (max-width: 560px) {
  .l-tierdeck { flex-direction: column; flex-wrap: nowrap; }
  .l-tier { flex: 0 0 auto; width: 100%; min-height: 70px; }
  .l-tier__price { font-size: 26px; }
  .l-tier__meta { white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  .l-tier { transition: none; }
}

/* 落地页字重层级：与站内一致（基准 600 → 小标题 700 → 大标题 800） */
.landing h1, .landing h2 { font-weight: 800; }
.landing h3, .landing h4 { font-weight: 700; }
.l-section-head .l-eyebrow { font-weight: 600; }

/* 单次成本试算：跟在次数文案后面，弱化处理 */
.l-tier__per { opacity: .78; }

/* ==========================================================================
   付款详情弹层
   ========================================================================== */
.buymask {
  position: fixed; inset: 0; z-index: 90;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: rgba(18, 22, 30, .42);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.buy {
  position: relative;
  width: min(460px, 100%);
  max-height: 88vh; overflow-y: auto;
  padding: 26px 28px 22px;
  border-radius: 18px;
  background: #fdfdfb;
  box-shadow: 0 24px 60px rgba(20, 26, 38, .22), inset 0 0 0 .5px rgba(0,0,0,.05);
}
html[data-theme="dark"] .buy { background: #1c1f26; }

.buy__x {
  position: absolute; top: 14px; right: 16px;
  border: 0; background: none; cursor: pointer;
  font-size: 14px; color: var(--sub); padding: 4px;
}
.buy__head { display: flex; align-items: baseline; gap: 9px; }
.buy__code {
  font-family: "Instrument Serif", var(--font-serif); font-style: italic;
  font-size: 26px; line-height: 1;
}
.buy__name { font-size: 12px; color: var(--sub); letter-spacing: .04em; }

.buy__price { display: flex; align-items: baseline; gap: 10px; margin: 12px 0 18px; }
.buy__amt {
  font-family: "Instrument Serif", var(--font-serif);
  font-size: 40px; line-height: 1;
}
.buy__cap { font-size: 12px; color: var(--sub); }

.buy__block { margin-bottom: 16px; }
.buy__block h4 {
  font-size: 11px; font-weight: 600; letter-spacing: .10em;
  color: var(--sub); text-transform: none; margin: 0 0 6px;
}
.buy__block p, .buy__block li { font-size: 12.5px; line-height: 1.7; color: var(--ink); margin: 0; }
.buy__block b { font-weight: 700; }
.buy__block ul { margin: 0; padding-left: 16px; }
.buy__block li + li { margin-top: 4px; }
.buy__block--next {
  padding: 10px 12px; border-radius: 9px;
  background: color-mix(in srgb, #c9932f 9%, transparent);
  border: .5px solid color-mix(in srgb, #c9932f 28%, transparent);
}
.buy__block--rule { color: var(--sub); }
.buy__block--rule li { font-size: 11.5px; color: var(--sub); }

.buy__msg { font-size: 12px; color: var(--sub); margin: 0 0 10px; }
.buy__btn { width: 100%; padding: 12px; border-radius: 11px; font-size: 14px; }

/* 落地页档位卡可点 */
.l-tier--buy { cursor: pointer; transition: transform .18s ease; }
.l-tier--buy:hover { transform: translateY(-2px); }

/* ==========================================================================
   2026-10-23 细节修订
   ========================================================================== */

/* 档位卡：当前价标注（仅随周期变价的档位） */
.l-tier__pricebox { display: flex; flex-direction: column; align-items: flex-end; gap: 3px; }
.l-tier__now {
  font-size: 9.5px; font-style: normal; letter-spacing: .08em;
  opacity: .5; white-space: nowrap;
}

/* 会员区底部动作组 */
.l-member-actions {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  margin-top: 26px;
}
.l-member-buy {
  display: inline-flex; align-items: baseline; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-size: 14px;
}
.l-member-buy small { font-size: 11.5px; opacity: .75; font-weight: 500; }
.l-member-cta {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 13px; color: var(--sub); text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--sub) 35%, transparent);
  padding-bottom: 1px;
}
.l-member-cta .s-icon { width: 12px; height: 12px; }
.l-member-cta:active { color: var(--ink); }

/* 页脚版本标识 */
.l-foot-version {
  font-size: 11px; color: var(--sub); opacity: .75;
  margin: 0 0 6px; letter-spacing: .02em; font-variant-numeric: tabular-nums;
}

/* 短屏（笔记本 768–900 高）：压缩纵向留白，让每屏内容尽量一屏装下 */
@media (max-height: 900px) {
  .l-modes { padding-block: 52px; }
  .l-modes .l-section-head { margin-bottom: 22px; }
  .l-mode-demo { min-height: 168px; margin-bottom: 22px; padding: 18px; }
  .l-mode-preview-body { padding: 22px; }
  .l-mode-choices .l-mode-choice { min-height: 88px; padding: 16px 20px; }
  .l-mba, .l-faq-section { padding-block: 52px; }
  .l-sec { padding-block: 48px; }
  .l-hero-inner { padding-top: 40px; }
}