:root {
  --ink: #17242d;
  --muted: #66747b;
  --paper: #f7f5ef;
  --cream: #eee9de;
  --white: #fff;
  --teal: #0b695d;
  --teal-deep: #064e48;
  --lime: #d6eb75;
  --coral: #f27662;
  --blue: #8fb9da;
  --line: rgba(23,36,45,.13);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  scroll-behavior: smooth;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--paper); }
button, a { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
.site-header {
  position: sticky; top: 0; z-index: 20; display: grid; grid-template-columns: 240px 1fr 240px;
  align-items: center; min-height: 76px; padding: 0 clamp(22px,5vw,76px);
  border-bottom: 1px solid rgba(23,36,45,.08); background: rgba(247,245,239,.9);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 11px; width: fit-content; }
.brand-mark { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 13px; color: #fff; background: var(--teal); font-weight: 900; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; letter-spacing: 1px; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 10px; letter-spacing: .5px; }
.site-header nav { display: flex; justify-content: center; gap: clamp(18px,3vw,42px); color: #44545b; font-size: 14px; }
.site-header nav a:hover { color: var(--teal); }
.site-header > .button { justify-self: end; }
.button {
  min-height: 48px; padding: 0 22px; border: 0; border-radius: 999px; color: #fff;
  background: var(--teal); font-weight: 800; box-shadow: 0 10px 28px rgba(11,105,93,.16);
}
.button:hover { transform: translateY(-2px); }
.button:focus-visible, a:focus-visible { outline: 3px solid rgba(242,118,98,.42); outline-offset: 3px; }
.button.compact { min-height: 42px; padding-inline: 18px; font-size: 13px; }
.section-shell { width: min(1180px, calc(100% - 44px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; min-height: 720px; padding-block: 72px 80px; }
.eyebrow { margin: 0 0 16px; color: var(--teal); font-size: 11px; font-weight: 900; letter-spacing: 2px; }
.hero h1 { margin: 0; font-size: clamp(54px,7.2vw,96px); line-height: .98; letter-spacing: -5px; }
.hero h1 em { color: var(--teal); font-style: normal; }
.hero-lead { max-width: 610px; margin: 30px 0 0; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 34px; }
.text-link { color: var(--teal); font-size: 14px; font-weight: 800; }
.trust-line { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 38px; color: #67767c; font-size: 12px; }
.trust-line span::before { content: "✓"; margin-right: 7px; color: var(--teal); font-weight: 900; }
.hero-product { position: relative; display: grid; place-items: center; min-height: 560px; }
.orbit { position: absolute; border: 1px solid rgba(11,105,93,.17); border-radius: 50%; }
.orbit-one { width: 510px; height: 510px; }
.orbit-two { width: 380px; height: 380px; border-style: dashed; }
.phone { position: relative; z-index: 2; width: 294px; min-height: 540px; padding: 11px; border: 9px solid #17242d; border-radius: 42px; background: #e9f0ec; box-shadow: 0 34px 70px rgba(28,49,47,.22); transform: rotate(2deg); }
.phone::before { content: ""; position: absolute; top: 10px; left: 50%; width: 82px; height: 22px; border-radius: 999px; background: #17242d; transform: translateX(-50%); }
.phone-top { display: flex; align-items: center; justify-content: space-between; padding: 5px 10px 17px; font-size: 9px; }
.phone-top i { width: 55px; }
.phone-top b { font-size: 10px; }
.phone-content { padding: 20px 10px 10px; }
.phone-content > p { margin: 0; color: #60756e; font-size: 10px; }
.phone-content > h2 { margin: 8px 0 20px; font-size: 22px; line-height: 1.3; }
.study-card { display: flex; align-items: center; justify-content: space-between; padding: 18px; border-radius: 20px; color: #fff; background: var(--teal); }
.study-card span, .study-card small { display: block; opacity: .72; font-size: 9px; }
.study-card strong { display: inline-block; margin: 7px 7px 3px 0; font-size: 30px; }
.progress-ring { display: grid; place-items: center; width: 60px; height: 60px; border: 7px solid rgba(255,255,255,.2); border-top-color: var(--lime); border-radius: 50%; }
.progress-ring b { font-size: 11px; }
.mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 10px; }
.mini-grid article { padding: 13px; border-radius: 16px; background: #fff; }
.mini-grid strong, .mini-grid small { display: block; }
.mini-grid strong { margin-top: 8px; font-size: 12px; }
.mini-grid small { margin-top: 3px; color: #87928e; font-size: 8px; }
.subject-dot { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 9px; font-size: 10px; font-style: normal; }
.subject-dot.orange { color: #a94f41; background: #fbe0db; }
.subject-dot.blue { color: #4c7190; background: #deebf5; }
.task-card { margin-top: 10px; padding: 15px; border-radius: 16px; background: #fff; }
.task-card span, .task-card b { display: block; font-size: 9px; }
.task-card b { margin-top: 6px; font-size: 11px; }
.task-card i { display: block; height: 5px; margin-top: 10px; border-radius: 99px; background: #e7ebe8; }
.task-card u { display: block; width: 62%; height: 100%; border-radius: inherit; background: var(--coral); }
.floating-note { position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px; padding: 12px 15px; border: 1px solid rgba(23,36,45,.08); border-radius: 15px; background: rgba(255,255,255,.92); box-shadow: 0 18px 42px rgba(30,49,47,.13); }
.floating-note > span { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 10px; color: var(--teal); background: #e4f0e7; font-weight: 900; }
.floating-note strong, .floating-note small { display: block; }
.floating-note strong { font-size: 11px; }
.floating-note small { margin-top: 3px; color: #85918d; font-size: 8px; }
.note-one { top: 105px; left: 5px; }
.note-two { right: 0; bottom: 105px; }
.numbers { display: grid; grid-template-columns: repeat(3,1fr) 2.3fr; align-items: center; padding: 34px clamp(24px,7vw,110px); color: #fff; background: var(--teal-deep); }
.numbers > div { display: flex; align-items: baseline; gap: 10px; }
.numbers strong { color: var(--lime); font-size: 38px; }
.numbers span { color: #c4d6d1; font-size: 12px; }
.numbers p { margin: 0; padding-left: 38px; border-left: 1px solid rgba(255,255,255,.2); color: #b6cbc5; font-size: 12px; line-height: 1.7; }
.section-block { padding-block: 120px; }
.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading h2, .role-card h2, .about-section h2, .cta-section h2 { margin: 0; font-size: clamp(36px,5vw,58px); line-height: 1.15; letter-spacing: -2px; }
.section-heading > p:last-child { margin: 18px 0 0; color: var(--muted); line-height: 1.8; }
.ability-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.ability-card { position: relative; min-height: 300px; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: rgba(255,255,255,.58); }
.ability-card.featured { grid-column: span 2; display: grid; grid-template-columns: 1fr 260px; align-items: center; color: #fff; background: var(--teal); }
.card-index { position: absolute; top: 22px; right: 24px; color: rgba(23,36,45,.35); font-size: 11px; }
.featured .card-index { color: rgba(255,255,255,.55); }
.ability-card .tag { width: fit-content; margin: 0 0 16px; padding: 6px 10px; border-radius: 999px; color: var(--teal); background: var(--lime); font-size: 10px; font-weight: 900; }
.ability-card h3 { margin: 18px 0 12px; font-size: 23px; line-height: 1.35; }
.ability-card p { color: var(--muted); line-height: 1.75; }
.ability-card.featured p:not(.tag) { color: #c2d7d2; }
.ability-icon { display: grid; place-items: center; width: 48px; height: 48px; margin-top: 26px; border-radius: 15px; font-weight: 900; }
.ability-icon.coral { color: #a54e40; background: #fde0da; }
.ability-icon.mint { color: #20685c; background: #dcefe9; }
.ability-icon.blue { color: #456f90; background: #e0edf6; }
.ability-icon.gold { color: #8a6629; background: #f5e8c7; }
.paper-stack { position: relative; height: 220px; }
.paper-stack i { position: absolute; inset: 18px; display: block; padding: 45px 25px; border-radius: 14px; background: #faf8f1; box-shadow: 0 18px 40px rgba(0,0,0,.14); transform: rotate(7deg); }
.paper-stack i:first-child { transform: rotate(-8deg) translate(-13px,10px); opacity: .52; }
.paper-stack i:nth-child(2) { transform: rotate(-1deg) translate(5px,2px); opacity: .72; }
.paper-stack i:last-child { color: var(--ink); transform: rotate(5deg); }
.paper-stack b, .paper-stack span { display: block; }
.paper-stack b { font-size: 21px; }
.paper-stack span { margin-top: 12px; color: var(--muted); font-size: 10px; }
.subject-section { padding-block: 110px; color: #fff; background: #172e2b; }
.section-heading.light .eyebrow { color: var(--lime); }
.section-heading.light > p:last-child { color: #aebfbb; }
.subject-list { display: grid; grid-template-columns: repeat(9,1fr); gap: 10px; }
.subject-list span { display: grid; place-items: center; min-height: 118px; gap: 8px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; color: #c7d5d2; font-size: 11px; }
.subject-list i { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 15px; color: var(--ink); background: var(--lime); font-size: 18px; font-style: normal; font-weight: 900; }
.coverage-note { display: flex; align-items: center; gap: 30px; margin-top: 25px; padding: 21px 24px; border-radius: 18px; background: rgba(255,255,255,.06); }
.coverage-note b { flex: 0 0 auto; color: var(--lime); }
.coverage-note p { margin: 0; color: #aebfbb; font-size: 13px; }
.steps { display: grid; grid-template-columns: repeat(4,1fr); margin: 0; padding: 0; list-style: none; counter-reset: item; }
.steps li { position: relative; display: flex; align-items: flex-start; gap: 15px; min-height: 150px; padding: 25px 22px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps li + li { border-left: 1px solid var(--line); }
.steps li > span { display: grid; place-items: center; width: 34px; height: 34px; flex: 0 0 auto; border-radius: 50%; color: #fff; background: var(--teal); font-weight: 900; }
.steps strong { display: block; margin-top: 5px; }
.steps p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.family-section { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding-bottom: 120px; }
.role-card { min-height: 500px; padding: 48px; border-radius: 28px; }
.role-card > p:not(.eyebrow) { max-width: 500px; margin: 25px 0; line-height: 1.8; }
.role-card ul { display: grid; gap: 12px; margin: 35px 0 0; padding: 0; list-style: none; }
.role-card li::before { content: "✓"; margin-right: 10px; font-weight: 900; }
.parent-card { background: #dcecec; }
.teacher-card { color: #fff; background: #1d363f; }
.teacher-card .eyebrow { color: #a7cfe9; }
.teacher-card > p:not(.eyebrow) { color: #b9c9ce; }
.about-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; padding-block: 110px; border-top: 1px solid var(--line); }
.about-section > div:last-child { color: var(--muted); font-size: 16px; line-height: 1.9; }
.cta-section { display: flex; align-items: center; justify-content: space-between; gap: 50px; padding: 90px max(22px,calc((100% - 1136px)/2)); color: #fff; background: var(--coral); }
.cta-section .eyebrow { color: #fff5dc; }
.cta-section h2 { max-width: 800px; }
.cta-section p:last-child { margin: 20px 0 0; color: #ffe2dc; }
.light-button { flex: 0 0 auto; color: var(--coral); background: #fff; }
footer { padding: 70px max(22px,calc((100% - 1136px)/2)) 26px; color: #bec9cc; background: #122126; }
.footer-main { display: grid; grid-template-columns: 2.2fr repeat(3,1fr); gap: 45px; padding-bottom: 60px; }
.footer-brand strong { color: #fff; }
.footer-main > div:not(:first-child) { display: grid; align-content: start; gap: 13px; font-size: 12px; }
.footer-main > div strong { margin-bottom: 5px; color: #fff; }
.footer-main a:hover { color: var(--lime); }
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: 11px; }
.floating-code { position: fixed; right: 22px; bottom: 22px; z-index: 18; display: grid; place-items: center; gap: 5px; width: 78px; height: 78px; border: 0; border-radius: 22px; color: #fff; background: var(--teal); box-shadow: 0 16px 45px rgba(6,78,72,.25); }
.floating-code span { display: grid; place-items: center; width: 29px; height: 29px; border-radius: 9px; color: var(--teal); background: var(--lime); font-weight: 900; }
.floating-code b { font-size: 10px; }
.modal { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 22px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(9,20,23,.72); backdrop-filter: blur(8px); }
.modal-card { position: relative; z-index: 1; width: min(430px,100%); padding: 38px; border-radius: 28px; background: #fff; box-shadow: 0 30px 90px rgba(0,0,0,.28); text-align: center; }
.modal-card h2 { margin: 0; font-size: 27px; }
.modal-card > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.modal-close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 0; border-radius: 50%; color: #607078; background: #f0f2f0; font-size: 24px; }
.code-placeholder { display: grid; place-items: center; min-height: 230px; margin-top: 25px; padding: 30px; border: 1px dashed rgba(11,105,93,.35); border-radius: 20px; background: #f1f6f2; }
.code-placeholder span { display: grid; place-items: center; width: 84px; height: 84px; border: 10px solid var(--teal); border-radius: 18px; color: var(--teal); font-size: 13px; font-weight: 900; }
.code-placeholder strong { margin-top: 18px; font-size: 14px; }
.code-placeholder small { margin-top: 6px; color: var(--muted); }
body.modal-open { overflow: hidden; }
.legal-header { position: static; }
.legal-main { width: min(900px,calc(100% - 44px)); margin: 0 auto; padding: 80px 0 110px; }
.legal-main .back-link { display: inline-block; margin-bottom: 35px; color: var(--teal); font-weight: 800; }
.legal-main h1 { margin: 0; font-size: clamp(40px,6vw,68px); letter-spacing: -2px; }
.legal-meta { margin: 15px 0 45px; color: var(--muted); }
.legal-card { padding: clamp(24px,5vw,56px); border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.legal-card h2 { margin: 34px 0 12px; font-size: 23px; }
.legal-card h2:first-child { margin-top: 0; }
.legal-card h3 { margin: 24px 0 8px; }
.legal-card p, .legal-card li { color: #53636a; line-height: 1.9; }
.legal-card li + li { margin-top: 7px; }
.notice { padding: 16px 18px; border-left: 4px solid var(--coral); background: #fff2ee; }
@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 70px; }
  .hero-copy { text-align: center; }
  .hero-lead { margin-inline: auto; }
  .hero-actions, .trust-line { justify-content: center; }
  .hero-product { margin-top: 20px; }
  .numbers { grid-template-columns: repeat(3,1fr); }
  .numbers p { grid-column: 1/-1; margin-top: 22px; padding: 20px 0 0; border-top: 1px solid rgba(255,255,255,.18); border-left: 0; text-align: center; }
  .ability-grid { grid-template-columns: 1fr 1fr; }
  .ability-card.featured { grid-column: 1/-1; }
  .subject-list { grid-template-columns: repeat(3,1fr); }
  .family-section { grid-template-columns: 1fr; }
  .role-card { min-height: 380px; }
  .footer-main { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-main > div:last-child { grid-column: 2/4; }
}
@media (max-width: 660px) {
  .site-header { min-height: 66px; padding-inline: 15px; }
  .site-header > .button { min-height: 38px; padding-inline: 14px; font-size: 11px; }
  .brand small { display: none; }
  .section-shell { width: min(100% - 28px,1180px); }
  .hero { min-height: auto; padding-block: 65px 45px; }
  .hero h1 { font-size: 53px; letter-spacing: -3px; }
  .hero-lead { font-size: 15px; }
  .hero-actions { flex-direction: column; gap: 18px; }
  .trust-line { gap: 10px 16px; }
  .hero-product { min-height: 520px; overflow: hidden; transform: scale(.85); margin: -25px -35px; }
  .note-one { left: 12px; }
  .note-two { right: 12px; }
  .numbers { grid-template-columns: 1fr; gap: 15px; padding-block: 30px; }
  .numbers > div { justify-content: center; }
  .numbers p { text-align: left; }
  .section-block { padding-block: 78px; }
  .section-heading { margin-bottom: 32px; }
  .section-heading h2, .role-card h2, .about-section h2, .cta-section h2 { font-size: 36px; letter-spacing: -1.3px; }
  .ability-grid { grid-template-columns: 1fr; }
  .ability-card.featured { grid-template-columns: 1fr; }
  .paper-stack { display: none; }
  .subject-section { padding-block: 75px; }
  .subject-list { gap: 7px; }
  .subject-list span { min-height: 98px; }
  .coverage-note { display: block; }
  .coverage-note p { margin-top: 10px; }
  .steps { grid-template-columns: 1fr; }
  .steps li { min-height: 100px; border: 0; border-top: 1px solid var(--line); }
  .steps li + li { border-left: 0; }
  .steps li:last-child { border-bottom: 1px solid var(--line); }
  .family-section { padding-bottom: 78px; }
  .role-card { min-height: auto; padding: 34px 25px; }
  .about-section { grid-template-columns: 1fr; gap: 30px; padding-block: 75px; }
  .cta-section { display: block; padding-block: 70px; }
  .cta-section .button { margin-top: 28px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; margin-bottom: 15px; }
  .footer-main > div:last-child { grid-column: 1/-1; }
  .floating-code { display: none; }
  .modal-card { padding: 32px 22px; }
  .legal-main { padding-top: 55px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}