:root {
  --blue: #1684e8;
  --blue-dark: #0c5fae;
  --blue-soft: #eaf6ff;
  --green: #25aa78;
  --green-soft: #e9f9f2;
  --yellow: #ffcf4d;
  --ink: #15304a;
  --muted: #5d7185;
  --line: #dfeaf2;
  --surface: #f7fbfe;
  --white: #fff;
  --shadow: 0 24px 64px rgba(32, 94, 142, .12);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(223, 234, 242, .85);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand img { width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 8px 20px rgba(22,132,232,.18); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-cn { font-size: 18px; }
.brand-en { margin-top: 5px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { position: relative; color: #425d75; font-size: 15px; font-weight: 650; text-decoration: none; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--blue); }
.nav-support { padding: 9px 15px; border: 1px solid #cfe4f5; border-radius: 999px; background: var(--blue-soft); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 12px; color: var(--ink); background: var(--surface); font-size: 22px; cursor: pointer; }

.hero { overflow: hidden; padding: 80px 0 86px; background: radial-gradient(circle at 76% 24%, #e5f8ef 0 11%, transparent 32%), linear-gradient(180deg, #f8fcff 0%, #fff 84%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 70px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 20px; padding: 7px 13px; border: 1px solid #cce4f6; border-radius: 999px; color: var(--blue-dark); background: rgba(255,255,255,.82); font-size: 14px; font-weight: 750; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(37,170,120,.12); }
h1, h2, h3 { margin-top: 0; line-height: 1.28; letter-spacing: -.035em; }
h1 { margin-bottom: 22px; font-size: clamp(42px, 5.4vw, 68px); }
h1 span { color: var(--blue); }
.hero-copy > p { max-width: 600px; margin: 0 0 30px; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border: 1px solid transparent; border-radius: 14px; font-weight: 750; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(22,132,232,.22); }
.button-primary:hover { background: #0879da; box-shadow: 0 15px 32px rgba(22,132,232,.28); }
.button-secondary { border-color: var(--line); color: var(--ink); background: #fff; }
.hero-note { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 18px; color: #668098; font-size: 13px; }
.hero-note span { display: inline-flex; align-items: center; gap: 7px; }
.hero-note span::before { content: "✓"; display: grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; color: var(--green); background: var(--green-soft); font-size: 12px; font-weight: 900; }

.visual-stage { position: relative; min-height: 500px; display: grid; place-items: center; }
.visual-stage::before { content: ""; position: absolute; inset: 15% 0 5%; border-radius: 50%; background: linear-gradient(145deg, #d8efff, #e5faef); filter: blur(2px); transform: rotate(-7deg); }
.word-bubble { position: absolute; z-index: 3; padding: 9px 15px; border: 1px solid rgba(255,255,255,.9); border-radius: 15px; color: var(--ink); background: rgba(255,255,255,.92); box-shadow: 0 12px 28px rgba(39,91,129,.13); font-size: 14px; font-weight: 800; }
.bubble-a { top: 13%; left: 1%; transform: rotate(-5deg); }
.bubble-b { right: -2%; top: 35%; transform: rotate(6deg); }
.bubble-c { left: 4%; bottom: 12%; transform: rotate(3deg); }
.phone { position: relative; z-index: 2; width: 276px; padding: 11px; border: 2px solid #20374d; border-radius: 43px; background: #20374d; box-shadow: 0 34px 65px rgba(24,66,99,.25); transform: rotate(4deg); }
.phone::before { content: ""; position: absolute; z-index: 4; top: 17px; left: 50%; width: 83px; height: 22px; border-radius: 999px; background: #20374d; transform: translateX(-50%); }
.phone-screen { min-height: 480px; overflow: hidden; border-radius: 32px; background: linear-gradient(180deg, #edf8ff 0%, #fff 44%); }
.app-top { padding: 46px 22px 20px; display: flex; justify-content: space-between; align-items: center; }
.app-greeting small { display: block; color: #6a8195; font-size: 11px; }
.app-greeting strong { font-size: 17px; }
.app-avatar { width: 42px; height: 42px; border: 2px solid #fff; border-radius: 50%; background: #bfe7ff; box-shadow: 0 5px 13px rgba(22,132,232,.18); object-fit: cover; }
.lesson-card { margin: 0 15px; padding: 18px; border-radius: 23px; color: #fff; background: linear-gradient(135deg, #1b8deb, #4abaaa); box-shadow: 0 18px 32px rgba(31,145,182,.22); }
.lesson-card small { opacity: .84; font-weight: 650; }
.lesson-card h3 { margin: 6px 0 18px; font-size: 22px; letter-spacing: -.02em; }
.progress { height: 7px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.28); }
.progress i { display: block; width: 62%; height: 100%; border-radius: inherit; background: #fff; }
.lesson-meta { margin-top: 9px; display: flex; justify-content: space-between; font-size: 10px; }
.mini-title { margin: 22px 20px 11px; font-size: 13px; }
.learning-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 0 15px; }
.learning-item { padding: 12px 6px 10px; border: 1px solid #edf2f6; border-radius: 16px; background: #fff; box-shadow: 0 7px 18px rgba(30,83,120,.07); text-align: center; }
.learning-icon { width: 38px; height: 38px; margin: 0 auto 6px; display: grid; place-items: center; border-radius: 12px; font-size: 18px; }
.learning-item:nth-child(1) .learning-icon { background: #e7f3ff; }
.learning-item:nth-child(2) .learning-icon { background: #fff3cd; }
.learning-item:nth-child(3) .learning-icon { background: #e7f8ef; }
.learning-item span { display: block; font-size: 10px; font-weight: 750; }
.daily-card { margin: 16px 15px 18px; padding: 12px 14px; display: flex; align-items: center; gap: 11px; border-radius: 16px; background: #f7fafc; }
.daily-star { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 11px; background: #fff1bb; }
.daily-card strong, .daily-card small { display: block; }
.daily-card strong { font-size: 11px; }
.daily-card small { color: #718496; font-size: 9px; }

.section { padding: 96px 0; }
.section-soft { background: var(--surface); }
.section-head { max-width: 680px; margin: 0 auto 48px; text-align: center; }
.kicker { margin: 0 0 10px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.section-head h2, .split-copy h2 { margin-bottom: 18px; font-size: clamp(32px, 4vw, 46px); }
.section-head p, .split-copy p { margin: 0; color: var(--muted); font-size: 17px; }
.about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 66px; align-items: center; }
.about-panel { position: relative; min-height: 370px; padding: 34px; overflow: hidden; border-radius: 34px; background: linear-gradient(150deg, #1684e8, #24a87a); box-shadow: var(--shadow); }
.about-panel::after { content: "ABC"; position: absolute; right: -24px; bottom: -38px; color: rgba(255,255,255,.12); font-size: 128px; font-weight: 900; letter-spacing: -.08em; }
.about-panel blockquote { position: relative; z-index: 1; margin: 0; color: #fff; font-size: 28px; font-weight: 800; line-height: 1.5; }
.about-panel p { position: relative; z-index: 1; margin-top: 26px; color: rgba(255,255,255,.78); }
.about-list { display: grid; gap: 18px; margin-top: 32px; }
.about-item { display: grid; grid-template-columns: 40px 1fr; gap: 14px; align-items: start; }
.about-num { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 13px; color: var(--blue); background: var(--blue-soft); font-size: 13px; font-weight: 850; }
.about-item h3 { margin: 0 0 3px; font-size: 17px; }
.about-item p { margin: 0; color: var(--muted); font-size: 14px; }

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card { min-height: 330px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 18px 38px rgba(30,83,120,.1); }
.feature-icon { width: 100%; aspect-ratio: 1.45; margin-bottom: 18px; display: grid; place-items: center; overflow: hidden; border-radius: 18px; background: #f4f9fc; }
.feature-icon img { width: 76%; height: 76%; object-fit: contain; }
.feature-card h3 { margin-bottom: 9px; font-size: 20px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }

.age-wrap { position: relative; display: grid; grid-template-columns: 1fr .85fr; gap: 60px; align-items: center; padding: 58px 64px; overflow: hidden; border-radius: 34px; background: #102e48; color: #fff; }
.age-wrap::after { content: "3–12"; position: absolute; right: 28px; bottom: -40px; color: rgba(255,255,255,.055); font-size: 170px; font-weight: 900; letter-spacing: -.08em; }
.age-wrap .kicker { color: #7adcb8; }
.age-wrap h2 { margin-bottom: 18px; font-size: clamp(34px, 4.2vw, 50px); }
.age-wrap p { margin: 0; color: #bdd0df; font-size: 17px; }
.age-scale { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.age-card { min-height: 150px; padding: 20px 14px; border: 1px solid rgba(255,255,255,.13); border-radius: 20px; background: rgba(255,255,255,.08); }
.age-card strong { display: block; color: #fff; font-size: 25px; }
.age-card span { color: #bad0df; font-size: 13px; }

.company-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.info-card { padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.info-icon { width: 48px; height: 48px; margin-bottom: 22px; display: grid; place-items: center; border-radius: 15px; color: var(--blue); background: var(--blue-soft); font-size: 23px; }
.info-card h2 { margin-bottom: 16px; font-size: 26px; }
.company-name-en { color: var(--muted); font-size: 13px; letter-spacing: .03em; }
.detail-list { margin: 24px 0 0; padding: 0; list-style: none; }
.detail-list li { padding: 12px 0; border-top: 1px solid #edf2f5; color: var(--muted); font-size: 14px; }
.detail-list strong { display: inline-block; min-width: 86px; color: var(--ink); }
.detail-list a { color: var(--blue-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }

.cta { padding: 72px 0; }
.cta-card { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 45px 52px; border-radius: 28px; background: linear-gradient(120deg, #eaf6ff, #e9f9f2); }
.cta-card h2 { margin-bottom: 8px; font-size: 30px; }
.cta-card p { margin: 0; color: var(--muted); }

.site-footer { padding: 54px 0 30px; background: #0d273d; color: #d5e2eb; }
.footer-grid { display: grid; grid-template-columns: 1.25fr .75fr .75fr; gap: 50px; }
.footer-brand .brand { color: #fff; }
.footer-brand p { max-width: 440px; margin: 18px 0 0; color: #91aabc; font-size: 14px; }
.footer-col h3 { margin-bottom: 14px; color: #fff; font-size: 14px; letter-spacing: .05em; }
.footer-col a { display: block; margin: 8px 0; color: #a8bfce; font-size: 14px; text-decoration: none; }
.footer-col a:hover { color: #fff; }
.footer-bottom { margin-top: 42px; padding-top: 24px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(255,255,255,.1); color: #7894a7; font-size: 12px; }
.footer-bottom { flex-wrap: wrap; }
.footer-bottom .icp-record { width: 100%; text-align: center; }
.footer-bottom .icp-record a { color: #a8bfce; text-decoration: none; }
.footer-bottom .icp-record a:hover { color: #fff; text-decoration: underline; }

.legal-hero { padding: 70px 0 56px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #f3faff, #fff); text-align: center; }
.legal-hero h1 { margin-bottom: 12px; font-size: clamp(38px, 5vw, 54px); }
.legal-hero p { margin: 0; color: var(--muted); }
.legal-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 64px; padding: 68px 0 90px; align-items: start; }
.legal-toc { position: sticky; top: 104px; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.legal-toc strong { display: block; margin-bottom: 10px; font-size: 13px; }
.legal-toc a { display: block; padding: 5px 0; color: var(--muted); font-size: 13px; text-decoration: none; }
.legal-toc a:hover { color: var(--blue); }
.legal-copy { max-width: 760px; }
.legal-copy h2 { margin: 42px 0 12px; padding-top: 8px; font-size: 25px; }
.legal-copy h2:first-child { margin-top: 0; }
.legal-copy h3 { margin: 26px 0 8px; font-size: 18px; }
.legal-copy p, .legal-copy li { color: #50677b; font-size: 15px; }
.legal-copy ul { padding-left: 22px; }
.legal-copy a { color: var(--blue-dark); }
.notice { margin-bottom: 30px; padding: 18px 20px; border-left: 4px solid var(--blue); border-radius: 4px 14px 14px 4px; background: var(--blue-soft); color: #3d617d; font-size: 14px; }

.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.support-card { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.support-card h2 { font-size: 21px; }
.support-card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.faq { margin-top: 44px; }
.faq details { padding: 19px 0; border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 750; }
.faq details p { margin: 10px 0 0; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}

@media (max-width: 960px) {
  .hero-grid, .about-grid, .age-wrap { grid-template-columns: 1fr; }
  .hero { padding-top: 62px; }
  .hero-grid { gap: 30px; }
  .hero-copy { text-align: center; }
  .hero-copy > p { margin-inline: auto; }
  .hero-actions, .hero-note { justify-content: center; }
  .visual-stage { min-height: 470px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .age-wrap { padding: 48px; gap: 34px; }
  .company-grid { grid-template-columns: 1fr; }
  .legal-layout { grid-template-columns: 1fr; gap: 28px; }
  .legal-toc { position: static; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, 1120px); }
  .nav-wrap { min-height: 68px; }
  .brand img { width: 39px; height: 39px; }
  .menu-toggle { display: grid; place-items: center; }
  .main-nav { position: absolute; top: 68px; left: 14px; right: 14px; display: none; padding: 14px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
  .main-nav.open { display: grid; gap: 4px; }
  .main-nav a { padding: 10px 12px; border-radius: 10px; }
  .nav-support { border: 0; }
  h1 { font-size: 42px; }
  .hero { padding: 54px 0 64px; }
  .hero-copy > p { font-size: 16px; }
  .visual-stage { min-height: 440px; transform: scale(.92); margin: -15px -10px -30px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 34px; }
  .feature-grid, .support-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 0; }
  .feature-icon { aspect-ratio: 1.8; }
  .about-panel { min-height: 310px; padding: 27px; }
  .about-panel blockquote { font-size: 24px; }
  .age-wrap { padding: 36px 26px; }
  .age-scale { grid-template-columns: 1fr; }
  .age-card { min-height: 0; }
  .info-card { padding: 27px; }
  .cta { padding: 54px 0; }
  .cta-card { padding: 32px 26px; align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
  .legal-hero { padding: 54px 0 42px; }
  .legal-layout { padding: 42px 0 70px; }
}

@media (max-width: 420px) {
  .hero-actions .button { width: 100%; }
  .word-bubble { font-size: 12px; }
  .phone { width: 258px; }
  .phone-screen { min-height: 450px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
}