:root {
  color-scheme: light;
  --paper: #fff;
  --background: #fafcff;
  --ink: #15233e;
  --muted: #596a80;
  --blue: #245de9;
  --line: #e1e8f1;
  --tint: #f0f5ff;
  --accent: var(--blue);
  --section-tint: #f3f7ff;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  line-height: 1.7;
  color: var(--ink);
  background: var(--background);
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
body, h1, h2, h3, p, figure, ol, dl, dd { margin: 0; }
body { min-width: 280px; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a, summary { touch-action: manipulation; }
img { display: block; max-width: 100%; object-fit: contain; }
::selection { background: #dbe7ff; color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; border-radius: 5px; }
[tabindex="-1"]:focus:not(:focus-visible) { outline: none; }
[id] { scroll-margin-top: 126px; }
.shell { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 12px 18px; border-radius: 10px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 16px; padding-top: 16px; z-index: 5; }
.navigation { display: flex; align-items: center; gap: 24px; min-height: 80px; padding: 13px 18px; border: 1px solid #e7edf6; border-radius: 19px; background: #fff; box-shadow: 0 7px 30px rgb(43 68 110 / 5%); }
@supports ((backdrop-filter: blur(18px)) or (-webkit-backdrop-filter: blur(18px))) {
  .navigation { background: rgb(255 255 255 / 89%); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
}
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; font-weight: 650; font-size: 22px; letter-spacing: .015em; }
.brand img { border-radius: 11px; }
.role-navigation { display: flex; justify-content: center; align-items: center; gap: 28px; margin-left: auto; font-size: 14px; font-weight: 500; }
.role-navigation a { padding: 10px 0; color: var(--muted); white-space: nowrap; }
.role-navigation a[aria-current="location"] { color: var(--blue); }
.role-navigation a:hover, .text-link:hover { color: #1744b4; }
.nav-download { display: inline-flex; gap: 10px; align-items: center; padding: 10px 16px; border-radius: 11px; background: var(--tint); color: #204fce; font-size: 14px; font-weight: 600; white-space: nowrap; }
.hero { padding-top: clamp(58px, 7vw, 88px); }
.eyebrow { display: flex; justify-content: center; align-items: center; gap: 9px; color: #315baa; font-size: 14px; font-weight: 550; }
.eyebrow > span { width: 6px; height: 6px; border-radius: 50%; background: #477cea; }
h1 { margin-top: 21px; font-size: clamp(36px, 4.4vw, 58px); line-height: 1.3; letter-spacing: -.035em; text-align: center; font-weight: 650; text-wrap: balance; }
h1 span { color: #203552; }
.hero-lead { margin-top: 24px; font-size: 18px; line-height: 1.9; color: var(--muted); text-align: center; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 29px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 18px; min-height: 50px; padding: 12px 22px; border: 1px solid transparent; border-radius: 12px; font-size: 15px; font-weight: 600; transition: background-color .15s, box-shadow .15s; }
.button-primary { color: #fff; background: var(--accent); box-shadow: 0 5px 14px rgb(36 93 233 / 8%); }
.button-primary:hover { box-shadow: 0 6px 20px rgb(36 93 233 / 20%); filter: brightness(.96); }
.button-secondary { border-color: var(--line); color: var(--ink); background: var(--paper); }
.button-secondary:hover { background: #f3f7fc; }
.journey { margin-top: 52px; padding: 30px 34px 34px; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); box-shadow: 0 16px 40px rgb(54 85 140 / 4%); }
.journey > h2 { font-size: 15px; font-weight: 600; margin-bottom: 27px; }
.journey-steps { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.journey-steps li { display: flex; gap: 14px; }
.step-number { padding-top: 1px; font-size: 14px; font-variant-numeric: tabular-nums; color: #406ab8; }
.journey h3 { font-size: 17px; font-weight: 600; line-height: 1.6; }
.journey p { margin-top: 8px; font-size: 14px; color: var(--muted); line-height: 1.9; }
.audience-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; margin-top: 30px; padding: 26px 0 8px; }
.audience-links a { display: flex; align-items: center; gap: 14px; padding: 10px 0; }
.audience-links img { flex: 0 0 52px; border-radius: 13px; }
.audience-links strong { display: block; font-size: 16px; font-weight: 600; }
.audience-links small { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; line-height: 1.65; }
.audience-arrow { margin-left: auto; color: #73829a; }
.audience-links a:hover strong { color: var(--blue); }
.role-sections { margin-top: 73px; }
.role-section { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: clamp(44px, 8vw, 108px); padding-block: 82px; border-top: 1px solid var(--line); align-items: start; }
.section-label { color: var(--accent); display: flex; gap: 8px; align-items: center; font-size: 14px; font-weight: 550; margin-bottom: 17px; }
.role-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.role-section h2, .section-heading h2 { font-size: clamp(29px, 3.1vw, 38px); line-height: 1.43; letter-spacing: -.025em; font-weight: 630; text-wrap: balance; }
.section-lead { font-size: 16px; color: var(--muted); line-height: 1.9; margin-top: 19px; max-width: 540px; }
.details-list { margin-top: 32px; }
.details-list > div { margin-top: 22px; padding-left: 16px; border-left: 2px solid var(--line); }
.details-list dt { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.details-list dd { color: var(--muted); font-size: 14px; line-height: 1.9; }
.details-list a, .questions-list p a, .download-help a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 550; color: var(--accent); padding: 8px 0; }
.role-copy > .text-link { margin-top: 24px; }
.teacher-section { --accent: #08735d; --section-tint: #f0f8f4; }
.agent-section { --accent: #795800; --section-tint: #fff9e9; }
.status-note { margin-top: 25px; padding: 15px 18px; border-radius: 10px; background: var(--section-tint); color: var(--muted); font-size: 13px; line-height: 1.9; }
.download-panel { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 32px 25px 24px; border-radius: 23px; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 16px 40px rgb(54 85 140 / 4%); }
.download-logo { border-radius: 19px; margin-bottom: 17px; }
.download-panel h3 { font-size: 24px; font-weight: 650; line-height: 1.4; }
.app-audience { color: var(--accent); font-size: 13px; margin-top: 5px; }
.download-description { color: var(--muted); font-size: 14px; line-height: 1.9; margin-block: 21px; }
.store-link { width: 100%; padding-inline: 13px; gap: 12px; font-size: 14px; }
.download-actions { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 320px; }
button.button { font-family: inherit; line-height: inherit; }
.android-link { width: 100%; font-size: 14px; color: var(--accent); }
.download-unavailable { width: 100%; color: var(--muted); border-color: var(--line); background: #f3f6fa; font-size: 14px; font-weight: 500; }
.download-meta { color: var(--muted); font-size: 12px; line-height: 1.8; overflow-wrap: anywhere; }
.download-panel .download-meta { text-align: center; }
.store-qr { margin-top: 23px; display: flex; flex-direction: column; align-items: center; }
.store-qr img { width: 164px; height: 164px; image-rendering: pixelated; }
.store-qr figcaption { margin-top: 5px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.small-link { margin-top: 13px; font-size: 12px; }
.downloads-section { margin-top: 10px; padding-block: 70px; background: #f0f5fc; border-top: 1px solid #e8eef6; border-bottom: 1px solid #e8eef6; }
.section-heading { margin-bottom: 33px; }
.section-heading > p:last-child:not(.section-label) { margin-top: 16px; color: var(--muted); font-size: 15px; }
.download-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.download-card { min-width: 0; border: 1px solid #e2e9f2; border-radius: 16px; background: var(--paper); padding: 22px; }
.download-card-heading { display: flex; gap: 15px; align-items: center; margin-bottom: 21px; }
.download-card-heading img { flex: 0 0 56px; border-radius: 14px; }
.download-card h3 { font-size: 18px; font-weight: 600; }
.download-card-heading p { margin-top: 3px; font-size: 12px; color: var(--muted); }
.download-help { margin-top: 29px; max-width: 830px; }
.download-help h3 { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.download-help p { font-size: 13px; color: var(--muted); line-height: 1.9; margin-top: 4px; }
.questions-section { display: grid; grid-template-columns: 1fr 1.5fr; gap: 70px; padding-top: 88px; padding-bottom: 88px; }
.questions-section .section-heading { margin: 0; }
.questions-section h2 { font-size: 30px; }
.questions-list { border-top: 1px solid var(--line); }
.questions-list details { border-bottom: 1px solid var(--line); }
.questions-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; font-weight: 550; font-size: 15px; padding: 21px 2px; list-style: none; }
.questions-list summary::-webkit-details-marker { display: none; }
.questions-list summary > span { flex-shrink: 0; font-size: 21px; font-weight: 400; color: #65758c; }
.questions-list details[open] summary > span { transform: rotate(45deg); }
.questions-list p { color: var(--muted); font-size: 14px; line-height: 1.95; padding: 0 30px 22px 2px; }
.contact-section { display: flex; justify-content: space-between; align-items: center; gap: 36px; padding: 40px; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); }
.contact-section .section-label { margin-bottom: 10px; }
.contact-section h2 { font-size: clamp(24px, 2.6vw, 30px); letter-spacing: -.02em; line-height: 1.5; font-weight: 620; }
.contact-section p:not(.section-label) { margin-top: 16px; font-size: 14px; color: var(--muted); line-height: 1.9; }
.contact-email { display: flex; flex-direction: column; align-items: flex-start; padding: 8px 0; }
.contact-email > span:first-child { font-size: 12px; color: var(--muted); }
.contact-email strong { font-size: 20px; font-weight: 550; margin-top: 5px; overflow-wrap: anywhere; }
.email-action { color: var(--blue); font-size: 14px; margin-top: 10px; }
.site-footer { padding-top: 49px; padding-bottom: 28px; color: var(--muted); }
.footer-main { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.footer-brand { font-size: 18px; color: var(--ink); }
.footer-brand img { border-radius: 9px; }
.footer-main p { font-size: 13px; }
.footer-main > a:last-child { margin-left: auto; font-size: 13px; padding-block: 8px; }
.footer-legal { display: flex; align-items: center; flex-wrap: wrap; column-gap: 21px; row-gap: 5px; font-size: 11px; line-height: 1.8; margin-top: 17px; }
.footer-legal > a { padding-block: 4px; }
.footer-legal > a:last-child { margin-left: auto; }
.site-footer a:hover { color: var(--blue); }
@media (max-width: 920px) {
  .shell { width: calc(100% - 40px); }
  .role-navigation { gap: 20px; }
  .navigation { gap: 20px; }
  .journey { padding: 28px; }
  .journey-steps { gap: 24px; }
  .desktop-break { display: none; }
  .audience-links { gap: 20px; }
  .audience-links a { gap: 11px; }
  .audience-arrow { display: none; }
  .role-section { grid-template-columns: minmax(0, 1fr) 294px; gap: 40px; }
  .download-panel { padding-inline: 21px; }
  .download-links { gap: 12px; }
  .download-card { padding: 17px; }
  .download-card-heading { gap: 10px; }
  .download-card-heading img { width: 44px; height: 44px; flex-basis: 44px; border-radius: 11px; }
  .questions-section { gap: 40px; }
  .contact-section { padding: 30px; }
}
@media (max-width: 700px) {
  .site-header { top: 8px; padding-top: 8px; }
  .navigation { display: grid; grid-template-columns: 1fr auto; gap: 7px 14px; padding: 12px 14px 7px; border-radius: 17px; }
  .brand { font-size: 20px; gap: 10px; }
  .brand img { width: 38px; height: 38px; border-radius: 10px; }
  .nav-download { grid-column: 2; grid-row: 1; font-size: 13px; padding: 9px 12px; }
  .role-navigation { grid-column: 1 / -1; grid-row: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-left: 0; font-size: 13px; text-align: center; }
  .role-navigation a { padding: 10px 0; }
  [id] { scroll-margin-top: 150px; }
  .hero { padding-top: 49px; }
  h1 { font-size: clamp(31px, 6.4vw, 43px); margin-top: 18px; letter-spacing: -.04em; }
  .eyebrow { font-size: 12px; }
  .hero-lead { font-size: 15px; max-width: 350px; margin: 19px auto 0; padding-inline: 8px; }
  .hero-actions { gap: 10px; margin-top: 25px; }
  .button { font-size: 14px; padding: 12px 18px; gap: 12px; }
  .journey { margin-top: 36px; border-radius: 18px; padding: 25px 23px; }
  .journey > h2 { margin-bottom: 22px; font-size: 14px; }
  .journey-steps { grid-template-columns: 1fr; gap: 24px; }
  .journey-steps li { gap: 17px; }
  .journey h3 { font-size: 16px; }
  .journey p { margin-top: 5px; font-size: 13px; }
  .audience-links { gap: 12px; margin-top: 20px; padding-top: 13px; }
  .audience-links a { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
  .audience-links img { width: 44px; height: 44px; flex-basis: auto; border-radius: 11px; }
  .audience-links strong { font-size: 14px; }
  .audience-links small { font-size: 11px; line-height: 1.8; }
  .role-sections { margin-top: 45px; }
  .role-section { grid-template-columns: minmax(0, 1fr); gap: 30px; padding-block: 51px; }
  .section-label { font-size: 13px; margin-bottom: 14px; }
  .role-section h2, .section-heading h2 { font-size: 29px; }
  .section-lead { font-size: 15px; margin-top: 16px; }
  .details-list { margin-top: 25px; }
  .details-list > div { margin-top: 21px; padding-left: 13px; }
  .details-list dt { font-size: 15px; }
  .details-list dd { font-size: 13px; }
  .download-panel { width: 100%; padding: 27px 24px 21px; border-radius: 20px; }
  .download-logo { width: 64px; height: 64px; border-radius: 16px; }
  .download-description { margin-block: 17px; }
  .store-link { max-width: 320px; }
  .store-qr { margin-top: 18px; }
  .store-qr img { width: 148px; height: 148px; }
  .downloads-section { margin-top: 0; padding-block: 49px; }
  .download-links { grid-template-columns: 1fr; gap: 11px; }
  .download-card { padding: 23px; }
  .download-card-heading { gap: 16px; margin-bottom: 20px; }
  .download-card-heading img { width: 50px; height: 50px; flex-basis: 50px; border-radius: 12px; }
  .download-card .download-actions { max-width: none; }
  .download-help { margin-top: 24px; }
  .questions-section { grid-template-columns: 1fr; gap: 27px; padding-block: 54px; }
  .questions-list summary { padding-block: 20px; font-size: 14px; }
  .questions-list p { font-size: 13px; }
  .contact-section { display: block; padding: 27px 24px; border-radius: 18px; }
  .contact-section h2 { font-size: 23px; }
  .contact-section p:not(.section-label) { font-size: 13px; }
  .contact-email { margin-top: 24px; padding-top: 21px; border-top: 1px solid var(--line); }
  .contact-email strong { font-size: 19px; }
  .site-footer { padding-top: 34px; padding-bottom: 23px; }
  .footer-main { gap: 15px; }
  .footer-main p { order: 3; width: 100%; font-size: 12px; }
  .footer-brand { font-size: 17px; }
  .footer-brand img { width: 33px; height: 33px; }
  .footer-legal { display: block; font-size: 11px; }
  .footer-legal > * { display: block; }
  .footer-legal > a:last-child { display: inline-block; margin-top: 9px; }
}
@media (max-width: 380px) {
  .shell { width: calc(100% - 32px); }
  .hero-actions .button { padding-inline: 14px; }
  .audience-links { gap: 9px; }
  .journey { padding-inline: 20px; }
  .contact-section { padding-inline: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .button, .navigation, .download-panel, .download-card, .contact-section { border: 1px solid CanvasText; }
  .role-navigation a[aria-current="location"] { text-decoration: underline; }
}