:root {
  color-scheme: light;
  --text: #203849;
  --secondary: #566873;
  --tertiary: #5d6e78;
  --line: #d4e1e8;
  --soft-line: #e8eff3;
  --link: #087fab;
  --notice: #f0f7fb;
  --page-width: 1220px;
  --blue: #149ed6;
  --wash: #edf7fc;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

html {
  color: var(--text);
  background: #fff;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: #fff;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-underline-offset: 0.16em;
}

a:focus-visible,
summary:focus-visible,
.table-wrap:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  color: #fff;
  background: var(--text);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 5; top: 0; background: rgb(255 255 255 / 96%); border-bottom: 1px solid var(--soft-line); }
.header-inner { width: min(calc(100% - 64px), var(--page-width)); min-height: 76px; margin: auto; display: flex; align-items: center; gap: 28px; }
.site-name { display: inline-flex; align-items: center; gap: 10px; margin-right: auto; color: var(--text); font-size: 22px; font-weight: 700; letter-spacing: -.045em; text-decoration: none; }
.site-name img { border-radius: 8px; }
.header-nav { display: flex; align-items: center; gap: 28px; }
.header-nav a, .language-link { color: var(--secondary); font-size: 14px; text-decoration: none; padding: 10px 0; }
.header-nav a:hover, .language-link:hover { color: var(--link); }
.language-link { margin-left: 10px; white-space: nowrap; }
.header-cta { padding: 10px 17px; border: 1px solid var(--line); border-radius: 9px; color: var(--text); font-size: 13px; font-weight: 600; text-decoration: none; white-space: nowrap; }
.header-cta:hover { border-color: var(--blue); color: var(--link); }
.back-link { display: inline-block; margin-bottom: 24px; font-size: 14px; }

.home-main {
  width: min(calc(100% - 48px), 800px);
  margin: 0 auto;
  padding: 48px 0 80px;
}

.page-heading h1,
.document-heading h1,
.not-found h1 {
  margin: 0;
  font-size: 30px;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.page-heading p {
  max-width: 680px;
  margin: 14px 0 0;
  color: var(--secondary);
}

.site-meta {
  margin: 32px 0 0;
  padding: 20px 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.site-meta dt,
.document-heading dt {
  color: var(--tertiary);
  font-size: 13px;
}

.site-meta dd,
.document-heading dd {
  margin: 3px 0 0;
  overflow-wrap: anywhere;
  font-size: 14px;
}

.document-index { margin-top: 40px; }
.document-index h2 { margin: 0 0 12px; font-size: 20px; }
.document-index > div { border-top: 1px solid var(--line); }

.document-row {
  padding: 20px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.document-row strong {
  display: block;
  font-size: 17px;
  font-weight: 600;
}

.document-row small {
  display: block;
  margin-top: 4px;
  color: var(--secondary);
  font-size: 14px;
  line-height: 1.55;
}

.document-row > span:last-child {
  color: var(--link);
  font-size: 14px;
}

.document-row:hover strong,
.document-row:hover > span:last-child { text-decoration: underline; }

.document-main {
  width: min(calc(100% - 48px), 720px);
  margin: 0 auto;
  padding: 48px 0 88px;
  display: block;
}

.legal-document { min-width: 0; }

.document-heading {
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.document-summary {
  max-width: 660px;
  margin: 14px 0 0;
  color: var(--secondary);
}

.document-heading dl {
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
}

.document-heading dl div { display: grid; }

.notice-box {
  margin: 28px 0 0;
  padding: 16px;
  color: var(--secondary);
  background: var(--notice);
  font-size: 14px;
}

.notice-box strong { color: var(--text); }

.legal-section {
  min-width: 0;
  padding: 36px 0 0;
  scroll-margin-top: 24px;
}

.legal-section h2 {
  margin: 0 0 16px;
  padding-top: 36px;
  border-top: 1px solid var(--soft-line);
  font-size: 21px;
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.legal-section:first-of-type h2 { border-top: 0; }
.legal-section h3 { margin: 26px 0 8px; font-size: 17px; }
.legal-section p { margin: 0 0 16px; color: var(--secondary); }
.legal-section ul,
.legal-section ol { margin: 6px 0 18px; padding-left: 1.3em; color: var(--secondary); }
.legal-section li { margin: 7px 0; padding-left: 0.2em; }
.legal-section strong { color: var(--text); }

.table-wrap {
  width: 100%;
  max-width: 100%;
  margin: 22px 0 26px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.6;
}

caption {
  padding: 10px 12px;
  color: var(--tertiary);
  font-size: 13px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th,
td {
  padding: 12px;
  vertical-align: top;
  text-align: left;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

th:last-child,
td:last-child { border-right: 0; }
tbody tr:last-child td { border-bottom: 0; }
th { color: var(--text); font-weight: 600; }
td { color: var(--secondary); }
td:first-child { width: 19%; color: var(--text); font-weight: 600; }

.site-footer { width: min(calc(100% - 64px), var(--page-width)); margin: auto; padding: 44px 0; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; color: var(--tertiary); border-top: 1px solid var(--line); font-size: 13px; }
.footer-brand p { margin: 8px 0 28px; }
.footer-links { display: grid; justify-content: start; gap: 10px; }
.footer-links a { color: var(--secondary); text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }
.footer-contact { display: grid; align-content: start; gap: 10px; }
.contact-email { color: var(--text); overflow-wrap: anywhere; }
.not-found a { display: inline-block; margin-right: 28px; }

.not-found {
  width: min(calc(100% - 48px), 720px);
  min-height: calc(100vh - 158px);
  margin: 0 auto;
  padding: 56px 0;
}

.not-found p { color: var(--secondary); }

@media (max-width: 560px) {
  .header-inner,
  .home-main,
  .document-main,
  .site-footer { width: min(calc(100% - 32px), var(--page-width)); }
  .header-inner { min-height: 54px; }
  .language-link { margin-left: 0; }
  .home-main,
  .document-main { padding-top: 32px; padding-bottom: 64px; }
  .page-heading h1,
  .document-heading h1,
  .not-found h1 { font-size: 26px; }
  .site-meta { grid-template-columns: 1fr; gap: 14px; }
  .document-row { grid-template-columns: 1fr; gap: 8px; }
  .document-heading dl { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .legal-section { padding-top: 30px; }
  .legal-section h2 { padding-top: 30px; font-size: 20px; }
  .legal-section p,
  .legal-section ul,
  .legal-section ol { font-size: 15px; }
  .site-footer { grid-template-columns: 1fr; gap: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  .site-header,
  .site-footer,
  .skip-link { display: none !important; }
  .document-main { display: block; width: 100%; padding: 0; }
  .legal-section { break-inside: avoid; }
  a { color: var(--text); text-decoration: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; }
}

/* 产品主页：以功能说明、对应内容示意和具体使用流程组织信息。 */
.page-width { width: min(calc(100% - 64px), var(--page-width)); margin-inline: auto; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.product-main svg { width: 24px; height: 24px; flex: 0 0 auto; }
.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding-block: 64px 54px; }
.hero h1 { margin: 0; font-size: clamp(36px, 3.7vw, 50px); font-weight: 700; line-height: 1.3; letter-spacing: -.035em; }
.hero h1 span { display: block; }
.hero-copy > p { margin: 0 0 24px; color: var(--secondary); font-size: 17px; line-height: 1.85; max-width: 530px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 48px; padding: 12px 20px; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; border-radius: 9px; text-decoration: none; }
.button.primary { background: var(--link); color: white; border: 1px solid var(--link); }
.button.primary:hover { background: #06698f; }
.button.secondary { color: var(--text); border: 1px solid var(--line); background: white; }
.button.secondary:hover { border-color: var(--link); }
.workspace-preview { min-width: 0; padding: 0; margin: 0; border: 0; }
.scene-switcher { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.scene-switcher label { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 56px; padding: 12px; border-radius: 8px; color: var(--secondary); font-size: 16px; cursor: pointer; }
.scene-switcher label:hover { background: #f5f9fc; color: var(--text); }
.scene-switcher svg { width: 21px; height: 21px; }
#scene-class:checked ~ .scene-switcher label[for="scene-class"],
#scene-note:checked ~ .scene-switcher label[for="scene-note"],
#scene-plan:checked ~ .scene-switcher label[for="scene-plan"],
#scene-agent:checked ~ .scene-switcher label[for="scene-agent"] { color: #086d97; background: #e2f3fc; font-weight: 650; box-shadow: inset 0 -2px #087fab; }
#scene-class:focus-visible ~ .scene-switcher label[for="scene-class"],
#scene-note:focus-visible ~ .scene-switcher label[for="scene-note"],
#scene-plan:focus-visible ~ .scene-switcher label[for="scene-plan"],
#scene-agent:focus-visible ~ .scene-switcher label[for="scene-agent"] { outline: 2px solid var(--link); outline-offset: 2px; }
.learning-scene { display: none; grid-template-columns: .8fr 1.25fr; gap: 66px; align-items: start; padding-block: 38px 54px; }
#scene-class:checked ~ .workspace-view [data-scene="class"],
#scene-note:checked ~ .workspace-view [data-scene="note"],
#scene-plan:checked ~ .workspace-view [data-scene="plan"],
#scene-agent:checked ~ .workspace-view [data-scene="agent"] { display: grid; }
.feature-details { padding-top: 12px; }
.feature-details h3 { margin: 0; font-size: 28px; font-weight: 650; letter-spacing: -.025em; line-height: 1.45; }
.feature-details > p { margin: 16px 0 26px; color: var(--secondary); font-size: 15px; line-height: 1.9; }
.feature-details dl { display: grid; gap: 17px; margin: 0; }
.feature-details dl > div { border-left: 2px solid #b0d9ed; padding-left: 15px; }
.feature-details dt { font-size: 14px; font-weight: 650; }
.feature-details dd { margin: 4px 0 0; font-size: 14px; line-height: 1.8; color: var(--secondary); }
.example-wrap { min-width: 0; background: #edf5fa; padding: 20px 20px 12px; border-radius: 14px; }
.product-example { min-height: 480px; background: white; border: 1px solid var(--line); border-radius: 9px; box-shadow: 0 6px 18px rgb(44 84 109 / 4%); overflow: hidden; }
.workspace-top { display: flex; align-items: center; gap: 8px; min-height: 53px; padding: 13px 20px; border-bottom: 1px solid var(--soft-line); font-size: 13px; font-weight: 600; }
.workspace-top img { border-radius: 6px; }
.preview-mark { margin-left: auto; color: var(--tertiary); font-size: 12px; font-weight: 500; }
.example-body { padding: 26px; }
.scene-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--tertiary); font-size: 11px; margin-bottom: 18px; }
.example-body h4 { margin: 0 0 22px; font-size: 24px; line-height: 1.4; letter-spacing: -.025em; }
.example-body h5 { margin: 0 0 8px; font-size: 14px; font-weight: 650; }
.transcript-block h5 { display: flex; align-items: center; gap: 8px; }
.sound-bars { display: flex; align-items: center; gap: 2px; height: 17px; color: var(--blue); }
.sound-bars i { display: block; width: 2px; height: 8px; background: currentColor; border-radius: 2px; }
.sound-bars i:nth-child(2n) { height: 15px; }
.transcript-block p { margin: 0; font-size: 14px; color: var(--secondary); line-height: 1.85; }
.lesson-notes { margin-top: 24px; padding: 16px 18px; background: #f1f8fc; border-left: 3px solid #80cae7; }
.lesson-notes ul { margin: 0; padding-left: 17px; font-size: 13px; color: var(--secondary); line-height: 1.85; }
.lesson-notes li + li { margin-top: 6px; }
.preview-caption { margin: 12px 0 0; color: var(--tertiary); font-size: 11px; text-align: center; }
.note-layout { display: grid; grid-template-columns: 130px 1fr; gap: 22px; }
.note-outline { border-right: 1px solid var(--soft-line); padding-right: 15px; font-size: 11px; color: var(--tertiary); }
.note-outline p { margin: 4px 0 16px; font-weight: 600; color: var(--secondary); }
.note-outline ul { list-style: none; margin: 0; padding: 0; }
.note-outline li { margin-block: 12px; }
.note-outline li:last-child { color: var(--link); }
.sample-note { color: var(--secondary); font-size: 13px; line-height: 1.85; }
.sample-note > p { margin-top: 0; }
.sample-note blockquote { margin: 20px 0; padding: 12px 14px; border-left: 3px solid #e2bd4a; background: #fff9df; color: #675b34; }
.sample-note h5 { margin: 22px 0 10px; color: var(--text); }
.note-checks { list-style: none; padding: 0; margin: 0; }
.note-checks li { display: flex; align-items: start; gap: 8px; margin-block: 7px; }
.note-checks svg { width: 15px; height: 15px; color: var(--link); margin-top: 5px; }
.sample-tasks { list-style: none; padding: 0; margin: 0; }
.sample-tasks li { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--soft-line); padding: 11px 0; font-size: 13px; }
.sample-tasks small { margin-left: auto; color: var(--tertiary); font-size: 11px; white-space: nowrap; }
.task-check { width: 18px; height: 18px; flex: 0 0 auto; border: 1px solid #abbfc9; border-radius: 5px; }
.task-check svg { width: 16px; height: 16px; }
.task-done .task-check { border-color: var(--link); background: var(--link); color: white; }
.task-done > span:nth-child(2) { color: var(--tertiary); text-decoration: line-through; }
.sample-goal { margin-top: 22px; }
.sample-goal > p:first-child { color: var(--tertiary); font-size: 11px; margin: 0 0 4px; }
.sample-goal label { display: block; color: var(--secondary); font-size: 11px; margin-top: 9px; }
.sample-goal progress { display: block; width: 100%; height: 5px; margin: 8px 0 13px; border: 0; border-radius: 4px; overflow: hidden; appearance: none; background: #e8eff3; accent-color: var(--link); }
.sample-goal progress::-webkit-progress-bar { background: #e8eff3; }
.sample-goal progress::-webkit-progress-value { background: var(--link); }
.sample-goal progress::-moz-progress-bar { background: var(--link); }
.sample-goal ul { list-style: none; padding: 0; margin: 0; font-size: 12px; color: var(--secondary); }
.sample-goal li { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.sample-goal li svg { width: 14px; height: 14px; color: var(--link); }
.milestone-dot { width: 6px; height: 6px; border-radius: 50%; border: 1px solid #879da9; margin-inline: 4px; flex: 0 0 auto; }
.next-action { border-top: 1px solid var(--soft-line); padding-top: 12px; margin: 14px 0 0; font-size: 12px; color: var(--secondary); }
.next-action strong { display: block; font-size: 11px; color: var(--tertiary); margin-bottom: 3px; }
.selected-context { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--line); padding-bottom: 19px; }
.selected-context svg { color: var(--link); }
.selected-context div { display: grid; gap: 3px; }
.selected-context small { color: var(--tertiary); font-size: 11px; }
.selected-context span { font-size: 14px; }
.sample-prompt { margin: 24px 0 23px 36px; padding: 14px 18px; background: #eef5f9; border-radius: 12px 12px 3px 12px; font-size: 14px; }
.sample-answer { display: flex; align-items: start; gap: 13px; }
.sample-answer > svg { color: var(--link); margin-top: 3px; width: 20px; height: 20px; }
.sample-answer p { margin: 0 0 10px; font-size: 14px; }
.sample-answer ol { margin: 0; padding-left: 18px; font-size: 13px; line-height: 1.9; color: var(--secondary); }
.section-intro h2, .devices-section h2, .faq-section > h2, .get-started h2 { font-size: clamp(26px, 2.6vw, 34px); font-weight: 650; letter-spacing: -.025em; line-height: 1.4; margin: 0; }
.section-intro > p { margin: 14px 0 0; color: var(--secondary); font-size: 16px; max-width: 720px; }
.learning-flow { padding-block: 55px 66px; border-top: 1px solid var(--line); }
.workflow-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 38px; margin: 34px 0 0; padding: 0; list-style: none; counter-reset: review-step; }
.workflow-steps > li { counter-increment: review-step; display: flex; flex-direction: column; align-items: start; }
.workflow-steps h3 { display: flex; align-items: baseline; gap: 12px; font-size: 20px; line-height: 1.5; margin: 0; }
.workflow-steps h3::before { content: counter(review-step); font-size: 14px; color: var(--link); border-bottom: 2px solid #9ed7ed; min-width: 22px; padding-bottom: 3px; }
.workflow-steps > li > p { margin: 14px 0 24px; color: var(--secondary); font-size: 14px; line-height: 1.9; }
.step-result { width: 100%; border-top: 1px solid var(--line); padding-top: 16px; margin-top: auto; }
.step-result > span { color: var(--tertiary); font-size: 12px; }
.step-result > p { margin: 6px 0 0; font-size: 14px; }
.access-section { background: #f3f8fb; padding-block: 55px; }
.access-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; }
.device-options { margin-top: 26px; display: grid; gap: 22px; }
.device-options article { display: flex; gap: 19px; }
.device-options article > svg { width: 30px; height: 40px; stroke-width: 1.3; color: var(--link); }
.device-options h3 { margin: 0; font-size: 17px; }
.device-use { margin: 3px 0 5px; font-size: 14px; font-weight: 500; }
.device-options article div > p:last-child { margin: 0; color: var(--secondary); font-size: 14px; max-width: 420px; }
.get-started { align-self: start; border-left: 1px solid var(--line); padding-left: 45px; }
.get-started img { border-radius: 12px; margin-bottom: 16px; }
.get-started > p { color: var(--secondary); font-size: 15px; line-height: 1.85; margin: 16px 0 24px; }
.support-contact { display: grid; gap: 4px; }
.support-contact > span:first-child { font-size: 12px; color: var(--tertiary); }
.support-contact .contact-email { font-size: 18px; font-weight: 600; overflow-wrap: anywhere; }
.release-links { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.faq-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 78px; padding-block: 60px; }
.faq-section details { border-top: 1px solid var(--line); }
.faq-section details:last-child { border-bottom: 1px solid var(--line); }
.faq-section summary { list-style: none; display: flex; justify-content: space-between; align-items: start; gap: 20px; min-height: 62px; padding: 18px 0; font-weight: 550; font-size: 16px; cursor: pointer; }
.faq-section summary::-webkit-details-marker { display: none; }
.faq-section summary > span { font-size: 22px; font-weight: 400; line-height: 24px; color: var(--tertiary); }
.faq-section details[open] summary > span { transform: rotate(45deg); }
.faq-section details > div { padding-bottom: 20px; color: var(--secondary); font-size: 14px; line-height: 1.85; }
.faq-section details p { margin: 0; }
.faq-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 12px; }
@media (max-width: 1100px) {
  .hero { gap: 40px; }
  .learning-scene { gap: 35px; grid-template-columns: .85fr 1.15fr; }
  .feature-details h3 { font-size: 25px; }
  .note-layout { grid-template-columns: 1fr; }
  .note-outline { border-right: 0; border-bottom: 1px solid var(--soft-line); padding: 0 0 12px; }
  .note-outline p { margin: 0 0 6px; }
  .note-outline ul { display: flex; flex-wrap: wrap; gap: 6px 12px; }
  .note-outline li { margin: 0; }
  .example-wrap { padding: 14px 14px 10px; }
  .example-body { padding: 22px; }
  .header-inner { gap: 20px; }
  .header-nav { gap: 18px; }
  .access-grid { gap: 45px; }
  .get-started { padding-left: 30px; }
}
@media (max-width: 850px) {
  .header-inner { flex-wrap: wrap; row-gap: 0; padding-top: 13px; }
  .header-nav { order: 3; flex-basis: 100%; justify-content: space-between; gap: 12px; }
  .header-nav a { min-height: 44px; display: flex; align-items: center; font-size: 13px; }
  html { scroll-padding-top: 128px; }
  .hero { grid-template-columns: 1fr; gap: 24px; padding-block: 42px 34px; }
  .hero-copy > p { max-width: 650px; }
  .learning-scene { grid-template-columns: 1fr; gap: 26px; padding-block: 26px 38px; }
  .feature-details { padding-top: 0; }
  .feature-details > p { max-width: 660px; margin-bottom: 20px; }
  .feature-details dl { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
  .product-example { min-height: 0; }
  .example-wrap { padding: 20px 20px 12px; }
  .note-layout { grid-template-columns: 135px 1fr; }
  .note-outline { border-bottom: 0; border-right: 1px solid var(--soft-line); padding-right: 15px; }
  .note-outline ul { display: block; }
  .note-outline li { margin-top: 12px; }
  .workflow-steps { gap: 24px; }
  .workflow-steps h3 { font-size: 18px; gap: 8px; }
  .access-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .faq-section { grid-template-columns: 1fr; gap: 26px; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .page-width, .header-inner, .site-footer { width: calc(100% - 40px); }
  .header-inner { min-height: 66px; gap: 14px; }
  .site-name { font-size: 21px; gap: 7px; }
  .header-cta { display: none; }
  .hero { padding-top: 32px; }
  .hero h1 { font-size: clamp(30px, 8vw, 40px); line-height: 1.35; }
  .hero-copy > p { font-size: 15px; margin-bottom: 20px; }
  .hero-actions { gap: 9px; }
  .button { font-size: 13px; padding-inline: 15px; }
  .scene-switcher { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
  .scene-switcher label { min-height: 46px; padding: 9px 6px; font-size: 14px; gap: 8px; }
  .scene-switcher svg { width: 18px; height: 18px; }
  .feature-details h3 { font-size: 24px; }
  .feature-details dl { grid-template-columns: 1fr; gap: 12px; }
  .feature-details dt, .feature-details dd { font-size: 13px; }
  .example-wrap { padding: 10px 10px 12px; margin-inline: -6px; }
  .example-body { padding: 18px; }
  .example-body h4 { font-size: 21px; margin-bottom: 18px; }
  .workspace-top { padding-inline: 16px; }
  .lesson-notes { padding: 13px; }
  .scene-breadcrumb { font-size: 10px; }
  .note-layout { grid-template-columns: 1fr; gap: 17px; }
  .note-outline { border-right: 0; border-bottom: 1px solid var(--soft-line); padding: 0 0 12px; }
  .note-outline ul { display: flex; flex-wrap: wrap; gap: 6px 12px; }
  .note-outline li { margin: 0; }
  .preview-caption { font-size: 10px; }
  .sample-prompt { margin-left: 14px; }
  .sample-answer { gap: 10px; }
  .sample-answer > svg { width: 17px; height: 17px; }
  .learning-flow { padding-block: 36px 42px; }
  .workflow-steps { grid-template-columns: 1fr; margin-top: 26px; gap: 28px; }
  .workflow-steps h3 { font-size: 20px; }
  .workflow-steps > li > p { margin-bottom: 15px; }
  .step-result { padding-top: 12px; }
  .access-section { padding-block: 38px; }
  .access-grid { grid-template-columns: 1fr; gap: 34px; }
  .get-started { border-left: 0; border-top: 1px solid var(--line); padding: 30px 0 0; }
  .faq-section { padding-block: 40px; gap: 24px; }
  .site-footer { padding-block: 30px; grid-template-columns: 1fr; gap: 26px; }
  .footer-brand p { margin-bottom: 14px; }
  .footer-contact { grid-column: auto; }
}