:root {
  --blue: #1265ef;
  --blue-dark: #084bc2;
  --blue-soft: #edf5ff;
  --blue-line: #b9d2fb;
  --navy: #071c46;
  --navy-2: #0b2c66;
  --text: #2b3f5d;
  --muted: #687994;
  --line: #dce6f3;
  --white: #fff;
  --green: #16845b;
  --yellow: #f5c94b;
  --surface: #f7faff;
  --shadow: 0 24px 70px rgba(17, 57, 118, .13);
  --radius: 18px;
  --content: 1240px;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--white); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link { position: fixed; top: 12px; left: 12px; z-index: 1000; padding: 10px 14px; color: #fff; background: var(--navy); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid rgba(220, 230, 243, .85); background: rgba(255,255,255,.94); backdrop-filter: blur(18px); }
.header-inner, .section-inner, .footer-inner { width: min(calc(100% - 48px), var(--content)); margin: 0 auto; }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--navy); font-size: 21px; font-weight: 850; letter-spacing: -.5px; }
.brand em { color: var(--blue); font-style: normal; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 11px; color: #fff; background: var(--blue); font: 800 13px var(--mono); box-shadow: 0 9px 22px rgba(18,101,239,.22); }
.header-nav { margin-left: auto; display: flex; align-items: center; gap: 28px; color: var(--navy); font-size: 14px; font-weight: 750; }
.header-nav > a:not(.button):hover { color: var(--blue); }

.button { min-height: 50px; padding: 0 23px; display: inline-flex; align-items: center; justify-content: center; border: 1.5px solid var(--blue); border-radius: 10px; cursor: pointer; font-weight: 800; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button:disabled { cursor: not-allowed; opacity: .56; transform: none; box-shadow: none; }
.button.primary { color: #fff; background: var(--blue); box-shadow: 0 12px 26px rgba(18,101,239,.2); }
.button.primary:hover { background: var(--blue-dark); }
.button.secondary { color: var(--blue); background: #fff; }
.button.small { min-height: 42px; padding: 0 17px; font-size: 13px; }
.button.full { width: 100%; }

.hero { overflow: hidden; padding: 82px 0 88px; background: radial-gradient(circle at 80% 22%, rgba(18,101,239,.11), transparent 28%), linear-gradient(180deg,#fff 0%,#f8fbff 100%); border-bottom: 1px solid #edf2f8; }
.hero-inner { width: min(calc(100% - 48px), var(--content)); margin: 0 auto; display: grid; grid-template-columns: 1.05fr .78fr; align-items: center; gap: 88px; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--blue); font-size: 13px; font-weight: 850; letter-spacing: .5px; }
.eyebrow span { width: 32px; border-top: 2px solid var(--blue); }
.hero h1 { max-width: 720px; margin: 21px 0 0; color: var(--navy); font-size: clamp(48px, 5.1vw, 72px); line-height: 1.1; letter-spacing: -3px; }
.hero h1 span { color: var(--blue); }
.hero-copy > p { max-width: 670px; margin: 28px 0 0; color: #4f6381; font-size: 18px; line-height: 1.85; }
.hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 13px; }
.hero-facts { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 30px; color: var(--muted); font-size: 13px; }
.hero-facts span { display: flex; align-items: baseline; gap: 6px; }
.hero-facts strong { color: var(--navy); font-size: 26px; }

.next-card { padding: 28px; border: 1px solid var(--blue-line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
.next-topline { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; font-weight: 750; }
.next-topline strong { margin-left: auto; color: var(--blue); font-size: 14px; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(22,132,91,.12); }
.next-card h2 { margin: 24px 0 0; color: var(--navy); font-size: 27px; line-height: 1.35; letter-spacing: -.5px; }
.next-card > p { min-height: 52px; margin: 11px 0 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.progress-track { height: 8px; margin-top: 24px; overflow: hidden; border-radius: 99px; background: #e7edf6; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg,var(--blue),#49a2ff); transition: width .3s ease; }
.next-meta { margin: 9px 0 21px; display: flex; justify-content: space-between; gap: 12px; color: #7a89a0; font-size: 11px; }
.review-due { width: 100%; margin: -7px 0 14px; padding: 10px 12px; border: 1px solid #f0c881; border-radius: 8px; color: #81520b; background: #fff8e9; cursor: pointer; font-size: 12px; font-weight: 800; }
.learning-loop { margin-top: 20px; display: flex; align-items: center; justify-content: center; gap: 8px; color: #5c7190; font: 700 11px var(--mono); }
.learning-loop span { padding: 7px 8px; border-radius: 6px; background: var(--blue-soft); }
.learning-loop i { color: #9eb0c9; font-style: normal; }

.readiness-section { padding: 96px 0; }
.readiness-grid { display: grid; grid-template-columns: .82fr 1.18fr; align-items: start; gap: 82px; }
.section-kicker { color: var(--blue); font-size: 12px; font-weight: 900; letter-spacing: 1.1px; text-transform: uppercase; }
.section-kicker.light { color: #79b4ff; }
.section-heading h2 { margin: 14px 0 0; color: var(--navy); font-size: clamp(36px,4vw,52px); line-height: 1.16; letter-spacing: -1.8px; }
.section-heading > p { max-width: 680px; margin: 17px 0 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.section-heading.centered { text-align: center; }
.section-heading.centered > p { margin-left: auto; margin-right: auto; }
.readiness-result { margin-top: 32px; padding: 18px; display: flex; align-items: center; gap: 17px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.result-number { display: grid; flex: 0 0 auto; width: 66px; height: 66px; place-items: center; border-radius: 12px; color: var(--blue); background: var(--blue-soft); font: 850 20px var(--mono); }
.readiness-result strong { color: var(--navy); font-size: 16px; }
.readiness-result p { margin: 5px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }

.checklist-card { padding: 13px 28px 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 18px 50px rgba(17,57,118,.08); }
.checklist-card label { min-height: 68px; display: flex; align-items: center; gap: 15px; border-bottom: 1px solid #e7edf5; cursor: pointer; }
.checklist-card input { width: 21px; height: 21px; flex: 0 0 auto; accent-color: var(--blue); }
.checklist-card label span { color: #536782; font-size: 14px; line-height: 1.55; }
.checklist-card label strong { margin-right: 7px; color: var(--navy); }
.checklist-actions { padding-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.checklist-actions > a { color: var(--blue); font-size: 13px; font-weight: 800; }
.checklist-actions .button { min-height: 44px; font-size: 13px; }

.curriculum-section { padding: 100px 0 112px; background: var(--surface); border-top: 1px solid #edf2f8; }
.curriculum-head { display: flex; align-items: end; justify-content: space-between; gap: 42px; }
.route-summary { flex: 0 0 auto; padding: 15px 18px; border: 1px solid var(--blue-line); border-radius: 11px; background: #fff; }
.route-summary span { display: block; margin-bottom: 5px; color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .8px; }
.route-summary strong { color: var(--navy); font-size: 13px; }
.module-list { margin-top: 48px; display: grid; gap: 17px; }
.module-card { display: grid; grid-template-columns: 90px 1fr auto; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: #fff; transition: border-color .2s ease, box-shadow .2s ease; }
.module-card:has(details[open]) { border-color: #9ec2fb; box-shadow: 0 18px 45px rgba(19,68,145,.09); }
.module-number { padding: 25px 18px; display: flex; flex-direction: column; align-items: center; gap: 9px; color: var(--blue); background: #eef5ff; font: 900 23px var(--mono); }
.module-number small { color: #6c87ac; font: 800 9px var(--sans); letter-spacing: .7px; }
.module-content { min-width: 0; }
.module-content details { height: 100%; }
.module-content summary { min-height: 112px; padding: 22px 26px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; list-style: none; cursor: pointer; }
.module-content summary::-webkit-details-marker { display: none; }
.module-content h3 { margin: 0; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: var(--navy); font-size: 21px; letter-spacing: -.3px; }
.pilot-badge { padding: 5px 8px; border-radius: 99px; color: #fff; background: var(--blue); font-size: 9px; font-weight: 900; letter-spacing: .4px; }
.module-content summary p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.module-meta { text-align: right; color: #71829a; font-size: 11px; }
.module-meta strong { display: block; margin-bottom: 5px; color: var(--blue); font-size: 12px; }
.lesson-list { padding: 0 26px 24px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.lesson-button { min-height: 74px; padding: 14px; display: grid; grid-template-columns: 27px 1fr auto; align-items: center; gap: 10px; border: 1px solid #dfe7f2; border-radius: 10px; color: #445b79; background: #fbfdff; cursor: pointer; text-align: left; }
.lesson-button:hover { border-color: #a9c7f7; background: #f3f8ff; }
.lesson-button.completed { border-color: #b6dfcc; background: #f3fbf7; }
.lesson-button.deep { border-color: #bdd3f7; background: #f7faff; }
.lesson-button.deep.completed { border-color: #a8dbc5; background: #f1fbf6; }
.lesson-status { display: grid; width: 27px; height: 27px; place-items: center; border: 1px solid #b8c8dc; border-radius: 50%; color: #8091a9; font: 800 10px var(--mono); }
.lesson-button.completed .lesson-status { border-color: var(--green); color: #fff; background: var(--green); }
.lesson-title { font-size: 13px; font-weight: 800; line-height: 1.45; }
.lesson-title small { margin-top: 4px; display: block; color: #6680a4; font-size: 9px; font-weight: 750; letter-spacing: .1px; }
.lesson-time { color: #8796aa; font-size: 10px; white-space: nowrap; }
.module-progress { width: 8px; background: #e8eef6; }
.module-progress span { display: block; width: 100%; height: 0; background: linear-gradient(180deg,var(--blue),#56a7ff); transition: height .3s ease; }

.method-section { padding: 104px 0 112px; }
.method-grid { margin-top: 52px; display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.method-grid article { min-height: 230px; padding: 25px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.method-grid article > span { display: grid; width: 45px; height: 45px; place-items: center; border-radius: 12px; color: var(--blue); background: var(--blue-soft); font: 900 13px var(--mono); }
.method-grid h3 { margin: 25px 0 0; color: var(--navy); font-size: 20px; }
.method-grid p { margin: 11px 0 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.capstone-section { padding: 0 0 104px; }
.capstone-card { min-height: 290px; padding: 44px; display: grid; grid-template-columns: 130px 1fr auto; align-items: center; gap: 38px; color: #d8e6fa; border-radius: 22px; background: radial-gradient(circle at 82% 20%,rgba(38,128,255,.28),transparent 26%),var(--navy); box-shadow: 0 24px 60px rgba(7,28,70,.2); }
.capstone-number { padding-right: 34px; border-right: 1px solid rgba(159,193,239,.28); color: #50a0ff; font: 900 18px/1.45 var(--mono); }
.capstone-copy h2 { margin: 13px 0 0; color: #fff; font-size: 34px; line-height: 1.25; letter-spacing: -1px; }
.capstone-copy p { max-width: 730px; margin: 13px 0 0; color: #bfd0e8; font-size: 14px; line-height: 1.8; }
.capstone-tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.capstone-tags span { padding: 7px 9px; border: 1px solid rgba(142,187,251,.35); border-radius: 6px; color: #c9dcf7; font: 700 10px var(--mono); background: rgba(19,68,145,.22); }
.light-button { border-color: #fff; color: var(--navy); background: #fff; white-space: nowrap; }

.site-footer { color: #c5d4e9; background: #041636; }
.footer-inner { min-height: 120px; display: flex; align-items: center; gap: 30px; }
.site-footer .brand { color: #fff; font-size: 18px; }
.site-footer p { margin: 0 auto; font-size: 12px; }
.site-footer > .footer-inner > a:last-child { color: #8cbcff; font-size: 12px; font-weight: 750; }

.lesson-dialog { width: min(calc(100% - 34px),1000px); max-height: calc(100vh - 34px); padding: 0; border: 0; border-radius: 20px; color: var(--text); background: #fff; box-shadow: 0 34px 90px rgba(3,18,47,.28); }
.lesson-dialog.deep-mode { width: min(calc(100% - 34px),1180px); }
.lesson-dialog::backdrop { background: rgba(4,18,46,.64); backdrop-filter: blur(5px); }
.dialog-shell { overflow: auto; max-height: calc(100vh - 34px); }
.dialog-header { padding: 25px 30px; display: flex; align-items: start; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.dialog-stage { color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .8px; }
.dialog-header h2 { margin: 7px 0 0; color: var(--navy); font-size: 26px; }
.dialog-header p { margin: 7px 0 0; color: var(--muted); font-size: 12px; }
.dialog-close { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 9px; color: #60728c; background: #fff; cursor: pointer; font-size: 25px; line-height: 1; }
.dialog-body { padding: 28px 30px; display: grid; grid-template-columns: 1.45fr .75fr; align-items: start; gap: 25px; background: #fbfdff; }
.deep-mode .dialog-body { grid-template-columns: minmax(0,1fr) 255px; }
.lesson-main, #basicLessonContent, .deep-lesson { min-width: 0; display: grid; gap: 12px; }
[hidden] { display: none !important; }
.lesson-block { padding: 19px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.lesson-block > span { color: var(--blue); font-size: 9px; font-weight: 900; letter-spacing: .8px; }
.lesson-block h3 { margin: 9px 0 0; color: var(--navy); font-size: 17px; line-height: 1.55; }
.lesson-block p { margin: 9px 0 0; color: #536782; font-size: 13px; line-height: 1.75; }
.objective-block { border-left: 4px solid var(--blue); }
.practice-block { position: relative; }
.practice-block pre { margin: 15px 0 0; padding: 17px; overflow: auto; border-radius: 9px; color: #dce8fa; background: #0a1d38; font: 12px/1.8 var(--mono); }
.copy-code { margin-top: 11px; padding: 8px 10px; border: 1px solid #c9daf2; border-radius: 7px; color: var(--blue); background: #fff; cursor: pointer; font-size: 11px; font-weight: 800; }
.copy-code:disabled { cursor: not-allowed; color: #8898ae; background: #f3f5f8; }
.diagnostic-block { border-color: #eed39c; background: #fffbf2; }
.diagnostic-block > span { color: #9a620d; }
.concept-grid { margin-top: 16px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; }
.concept-grid article { padding: 14px; border: 1px solid #dce7f6; border-radius: 9px; background: #f8fbff; }
.concept-grid strong { color: var(--navy); font-size: 12px; }
.concept-grid p { margin-top: 6px; font-size: 11px; line-height: 1.65; }
.worked-steps { margin: 14px 0 0; padding-left: 20px; color: #536782; font-size: 12px; line-height: 1.75; }
.expected-result { margin-top: 13px; padding: 12px 14px; border-left: 3px solid var(--green); border-radius: 6px; background: #f2faf6; }
.expected-result strong { color: #126a4c; font-size: 11px; }
.expected-result p { margin-top: 4px; font-size: 11px; }
.faded-block { border-style: dashed; border-color: #a9c7f7; }
.transfer-block { border-left: 4px solid #8a59d4; }
.check-list, .rubric-list { margin: 14px 0 0; padding: 0; display: grid; gap: 8px; list-style: none; }
.check-list li, .rubric-list li { position: relative; padding-left: 22px; color: #536782; font-size: 12px; line-height: 1.6; }
.check-list li::before, .rubric-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 900; }
.mastery-block { border-color: #a9c7f7; background: #f7faff; }
.mastery-block fieldset { margin: 14px 0 0; padding: 0; display: grid; gap: 8px; border: 0; }
.mastery-block legend { margin-bottom: 10px; color: var(--navy); font-size: 14px; font-weight: 850; line-height: 1.55; }
.mastery-block fieldset label { padding: 11px 12px; display: flex; align-items: flex-start; gap: 9px; border: 1px solid #d6e2f2; border-radius: 8px; background: #fff; cursor: pointer; }
.mastery-block fieldset input { margin-top: 2px; accent-color: var(--blue); }
.mastery-block fieldset span { color: #4f6381; font-size: 12px; line-height: 1.55; }
.quiz-feedback { min-height: 22px; margin-top: 10px !important; padding: 8px 10px; border-radius: 7px; }
.quiz-feedback:empty { padding: 0; }
.quiz-feedback.success { color: #116246; background: #eaf8f1; }
.quiz-feedback.error { color: #9a4e16; background: #fff2e9; }
.evidence-field { margin-top: 16px; display: grid; gap: 4px; }
.evidence-field strong { color: var(--navy); font-size: 12px; }
.evidence-field span { color: #697d99; font-size: 11px; line-height: 1.55; }
.mastery-block textarea, .review-row textarea { width: 100%; margin-top: 8px; padding: 12px; resize: vertical; border: 1px solid #c8d8ee; border-radius: 8px; color: var(--text); background: #fff; font: 12px/1.65 var(--sans); }
.mastery-status { margin-top: 14px; padding: 12px; display: grid; gap: 4px; border-radius: 8px; color: #5d718e; background: #eaf2ff; font-size: 11px; }
.mastery-status strong { color: var(--navy); font-size: 12px; }
.rubric-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
.source-list { margin-top: 18px; padding-top: 15px; display: grid; gap: 8px; border-top: 1px solid var(--line); }
.source-list > strong { color: var(--navy); font-size: 11px; }
.source-list a { padding: 10px 11px; display: grid; gap: 3px; border: 1px solid #dbe6f4; border-radius: 8px; background: #fbfdff; }
.source-list a span { color: var(--blue); font-size: 11px; font-weight: 800; }
.source-list a small { color: #74869f; font-size: 10px; line-height: 1.5; }
.review-list { margin-top: 14px; display: grid; gap: 10px; }
.review-row { padding: 13px; display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 8px 12px; border: 1px solid #dce6f3; border-radius: 9px; background: #fbfdff; }
.review-row strong { color: var(--navy); font-size: 11px; }
.review-row p { margin-top: 3px; font-size: 11px; }
.review-row textarea { grid-column: 1 / -1; margin: 0; }
.review-row textarea:disabled { color: #8795a8; background: #f0f3f7; }
.review-save { margin: 0; align-self: start; }
.review-feedback { grid-column: 1 / -1; color: #a35119; }
.deep-mode .mentor-card { position: sticky; top: 0; }
.mentor-card { padding: 21px; border: 1px solid #b9d2fb; border-radius: 13px; background: #f2f7ff; }
.mentor-label { display: flex; align-items: center; gap: 8px; color: var(--blue); font-size: 12px; font-weight: 850; }
.mentor-label span { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 9px; color: #fff; background: var(--blue); font: 800 10px var(--mono); }
.mentor-card h3 { margin: 17px 0 0; color: var(--navy); font-size: 15px; }
.mentor-card ol { margin: 14px 0 0; padding: 0; display: grid; gap: 9px; list-style: none; counter-reset: hints; }
.mentor-card li { padding: 11px; border: 1px solid #cfe0f8; border-radius: 8px; color: #4e6483; background: #fff; cursor: pointer; font-size: 12px; line-height: 1.6; }
.mentor-card li::before { counter-increment: hints; content: "提示 " counter(hints); display: block; margin-bottom: 4px; color: var(--blue); font-size: 9px; font-weight: 900; }
.mentor-card li span { display: none; }
.mentor-card li.revealed span { display: inline; }
.mentor-card li:not(.revealed)::after { content: "点击查看"; color: #8498b5; }
.mentor-rule { margin-top: 18px; padding-top: 16px; border-top: 1px solid #cadaf1; }
.mentor-rule strong { color: var(--navy); font-size: 11px; }
.mentor-rule p { margin: 5px 0 0; color: #677b98; font-size: 11px; line-height: 1.6; }
.dialog-footer { padding: 19px 30px; display: flex; align-items: center; justify-content: space-between; gap: 25px; border-top: 1px solid var(--line); }
.dialog-footer p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.dialog-footer .button { flex: 0 0 auto; min-height: 44px; font-size: 12px; }

:focus-visible { outline: 3px solid rgba(18,101,239,.3); outline-offset: 3px; }

@media (max-width: 980px) {
  .header-nav > a:not(.button) { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 46px; }
  .hero-copy { max-width: 760px; }
  .next-card { max-width: 620px; }
  .readiness-grid { grid-template-columns: 1fr; gap: 40px; }
  .method-grid { grid-template-columns: repeat(2,1fr); }
  .capstone-card { grid-template-columns: 100px 1fr; }
  .capstone-card .light-button { grid-column: 2; justify-self: start; }
}

@media (max-width: 700px) {
  .header-inner, .section-inner, .footer-inner, .hero-inner { width: min(calc(100% - 28px),var(--content)); }
  .header-inner { min-height: 68px; }
  .brand { font-size: 16px; }
  .brand-mark { width: 33px; height: 33px; }
  .header-nav .button { min-height: 39px; padding: 0 12px; font-size: 11px; }
  .hero { padding: 54px 0 62px; }
  .hero h1 { font-size: 42px; letter-spacing: -2px; }
  .hero-copy > p { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-facts { gap: 18px; }
  .next-card { padding: 21px; }
  .learning-loop { gap: 4px; }
  .learning-loop span { padding: 6px 5px; font-size: 9px; }
  .readiness-section, .curriculum-section, .method-section { padding: 72px 0; }
  .section-heading h2 { font-size: 35px; }
  .checklist-card { padding: 10px 18px 20px; }
  .checklist-actions { align-items: stretch; flex-direction: column; }
  .curriculum-head { align-items: stretch; flex-direction: column; }
  .route-summary { width: 100%; }
  .module-card { grid-template-columns: 62px 1fr 6px; }
  .module-number { padding: 22px 9px; font-size: 17px; }
  .module-content summary { min-height: 108px; padding: 18px 15px; grid-template-columns: 1fr; gap: 8px; }
  .module-content h3 { font-size: 17px; }
  .module-meta { text-align: left; }
  .lesson-list { padding: 0 15px 18px; grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .method-grid article { min-height: 0; }
  .capstone-section { padding-bottom: 72px; }
  .capstone-card { width: min(calc(100% - 28px),var(--content)); padding: 27px; grid-template-columns: 1fr; gap: 24px; }
  .capstone-number { padding: 0 0 18px; border-right: 0; border-bottom: 1px solid rgba(159,193,239,.28); }
  .capstone-copy h2 { font-size: 28px; }
  .capstone-card .light-button { grid-column: auto; width: 100%; }
  .footer-inner { padding: 28px 0; align-items: flex-start; flex-direction: column; }
  .site-footer p { margin: 0; }
  .dialog-header { padding: 20px; }
  .dialog-body { padding: 19px; grid-template-columns: 1fr; }
  .concept-grid, .rubric-list { grid-template-columns: 1fr; }
  .review-row { grid-template-columns: 1fr; }
  .review-row .review-save { justify-self: start; }
  .deep-mode .mentor-card { position: static; }
  .dialog-footer { padding: 17px 19px; align-items: stretch; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}