:root {
      color-scheme: light;
      --blue: #0073cf;
      --blue-deep: #07569c;
      --ink: #111820;
      --muted: #506071;
      --pale: #f2f8ff;
      --pale-strong: #e4f1ff;
      --line: #c9def2;
      --white: #fff;
      --shadow: 0 18px 50px rgba(7, 55, 100, .13);
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--ink);
      background: var(--white);
      line-height: 1.6;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; }
    button { font: inherit; }
    .wrap { width: min(var(--max), calc(100% - 44px)); margin: 0 auto; }
    .skip-link { position: absolute; left: -9999px; top: 8px; z-index: 99; padding: 10px 14px; background: white; color: var(--ink); }
    .skip-link:focus { left: 8px; }
    :focus-visible { outline: 3px solid #ffbe45; outline-offset: 3px; }
    .eyebrow { color: var(--blue); font-size: .76rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
    .nav { display: flex; min-height: 74px; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 1.1rem; font-weight: 900; letter-spacing: .055em; }
    .brand-mark { width: 38px; height: 38px; display: grid; place-items: center; color: white; background: var(--blue); border-radius: 12px 12px 12px 3px; font-weight: 900; font-size: 1.25rem; }
    .nav-links { display: flex; align-items: center; gap: 23px; }
    .nav-links a { color: #263849; font-size: .89rem; font-weight: 700; text-decoration: none; }
    .nav-links a:hover { color: var(--blue); }
    .nav-links .nav-cta { padding: 10px 16px; color: white; background: var(--blue); border-radius: 999px; }
    .nav-links .nav-cta:hover { color: white; background: var(--blue-deep); }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; background: white; color: var(--ink); font-weight: 700; }
    .hero { padding: 42px 0 54px; background: linear-gradient(180deg, #f8fbff 0%, white 100%); }
    .hero-grid { display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: 42px; }
    .hero-copy { padding: 15px 0 15px 4px; }
    .hero h1 { max-width: 590px; margin: 14px 0 18px; font-size: clamp(2.8rem, 5.4vw, 5.15rem); line-height: .99; letter-spacing: -.065em; }
    .hero h1 span { color: var(--blue); }
    .hero-copy p { max-width: 510px; margin: 0 0 25px; color: var(--muted); font-size: 1.08rem; line-height: 1.7; }
    .actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 47px; padding: 11px 19px; border: 2px solid var(--blue); border-radius: 8px; color: white; background: var(--blue); font-size: .92rem; font-weight: 800; text-decoration: none; transition: transform .16s ease, background .16s ease; }
    .button:hover { background: var(--blue-deep); border-color: var(--blue-deep); transform: translateY(-2px); }
    .button-outline { color: var(--blue-deep); background: transparent; }
    .button-outline:hover { color: white; }
    .hero-image-wrap { position: relative; isolation: isolate; padding: 12px; border: 1px solid #c5ddf4; border-radius: 20px; background: white; box-shadow: var(--shadow); }
    .hero-image-wrap:before { position: absolute; z-index: -1; content: ""; inset: -14px -14px 18px 18px; border: 1px solid #73b5ec; border-radius: 22px; background-image: linear-gradient(rgba(0,115,207,.10) 1px, transparent 1px), linear-gradient(90deg, rgba(0,115,207,.10) 1px, transparent 1px); background-size: 22px 22px; }
    .hero-image { width: 100%; height: auto; aspect-ratio: 2.57 / 1; object-fit: contain; object-position: center; border-radius: 12px; }
    .hero-caption { margin: 9px 4px 0; color: #49627b; font-size: .78rem; font-weight: 700; }
    .promise { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; }
    .promise-inner { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 17px 0; flex-wrap: wrap; }
    .promise-inner strong { font-size: .96rem; }
    .promise-list { display: flex; gap: 21px; flex-wrap: wrap; }
    .promise-list span { color: var(--blue-deep); font-size: .88rem; font-weight: 750; }
    .promise-list span:before { content: "✦"; margin-right: 7px; color: var(--blue); }
    section { padding: 78px 0; scroll-margin-top: 85px; }
    .section-heading { max-width: 720px; margin-bottom: 32px; }
    .section-heading h2 { margin: 10px 0 12px; font-size: clamp(2.2rem, 4vw, 3.55rem); line-height: 1.05; letter-spacing: -.055em; }
    .section-heading p { max-width: 660px; margin: 0; color: var(--muted); font-size: 1rem; }
    .classroom { background: var(--pale); }
    .classroom-intro { display: grid; grid-template-columns: .95fr 1.05fr; gap: 45px; align-items: start; }
    .classroom-note { padding: 25px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 8px 28px rgba(7,55,100,.06); }
    .classroom-note h3 { margin: 0 0 9px; font-size: 1.15rem; }
    .classroom-note p { margin: 0; color: var(--muted); }
    .subject-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 30px; }
    .subject-card { position: relative; overflow: hidden; min-height: 222px; padding: 23px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 10px 28px rgba(7,55,100,.055); }
    .subject-card:after { position: absolute; right: -28px; bottom: -36px; width: 115px; height: 115px; content: ""; border: 1px solid rgba(0,115,207,.28); border-radius: 50%; box-shadow: 0 0 0 13px rgba(0,115,207,.035), 0 0 0 28px rgba(0,115,207,.025); }
    .subject-icon { display: grid; width: 48px; height: 48px; place-items: center; margin-bottom: 16px; border: 1px solid #a9d3f5; border-radius: 12px; color: var(--blue-deep); background-color: #e7f4ff; background-image: linear-gradient(rgba(0,115,207,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(0,115,207,.07) 1px,transparent 1px); background-size: 8px 8px; font-size: 1.35rem; font-weight: 800; }
    .subject-card h3 { margin: 0 0 7px; font-size: 1.25rem; }
    .subject-card p { max-width: 320px; margin: 0 0 15px; color: var(--muted); font-size: .91rem; }
    .text-link { position: relative; z-index: 1; color: var(--blue-deep); font-size: .88rem; font-weight: 800; text-decoration: none; }
    .text-link:hover { text-decoration: underline; }
    .subject-detail { border-top: 1px solid var(--line); }
    .detail-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 48px; align-items: start; }
    .detail-copy h2 { margin: 8px 0 13px; font-size: clamp(2.2rem, 4vw, 3.4rem); line-height: 1.05; letter-spacing: -.05em; }
    .detail-copy p { color: var(--muted); }
    .detail-copy .subject-mark { display: inline-block; margin-top: 10px; padding: 6px 10px; border: 1px solid #acd2ef; border-radius: 6px; color: var(--blue-deep); background: var(--pale); font-size: .76rem; font-weight: 800; letter-spacing: .12em; }
    .course-list { display: grid; gap: 12px; }
    .course-row { display: grid; grid-template-columns: 48px 1fr auto; gap: 15px; align-items: center; padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: white; }
    .course-number { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 10px; color: white; background: var(--blue); font-size: .9rem; font-weight: 900; }
    .course-row h3 { margin: 0 0 3px; font-size: 1rem; }
    .course-row p { margin: 0; color: var(--muted); font-size: .84rem; }
    .course-row a { color: var(--blue-deep); font-size: .84rem; font-weight: 800; text-decoration: none; white-space: nowrap; }
    .course-row a:hover { text-decoration: underline; }
    .language { background: var(--pale); }
    .learning-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 21px; }
    .learning-tags span { padding: 8px 12px; border: 1px solid #b8d8f2; border-radius: 999px; color: #164f7f; background: white; font-size: .85rem; font-weight: 700; }
    .feature-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .feature { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: white; }
    .feature b { display: block; margin-bottom: 5px; font-size: .96rem; }
    .feature span { color: var(--muted); font-size: .88rem; }
    .music { border-top: 1px solid var(--line); }
    .music-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; padding: 28px; border: 1px solid var(--line); border-radius: 16px; background: linear-gradient(120deg, #f3f9ff, white); }
    .music-note { min-height: 220px; display: grid; place-items: center; border: 1px solid #b9d9f3; border-radius: 12px; color: var(--blue); background-color: white; background-image: linear-gradient(rgba(0,115,207,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(0,115,207,.07) 1px,transparent 1px); background-size: 24px 24px; }
    .music-note span { font-size: 7rem; font-weight: 400; }
    .music-panel h3 { margin: 0 0 10px; font-size: 1.5rem; }
    .music-panel p { color: var(--muted); }
    .approach { background: #0b2741; color: white; }
    .approach .eyebrow { color: #78c4ff; }
    .approach .section-heading p { color: #c7d9e7; }
    .approach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .approach-card { padding: 22px; border: 1px solid rgba(144,203,247,.32); border-radius: 12px; background: rgba(255,255,255,.06); }
    .approach-card .n { color: #7bc7ff; font-size: .84rem; font-weight: 900; letter-spacing: .12em; }
    .approach-card h3 { margin: 9px 0 7px; font-size: 1.08rem; }
    .approach-card p { margin: 0; color: #c7d9e7; font-size: .91rem; }
    .about { background: white; }
    .about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: center; }
    .about-stamp { min-height: 260px; display: grid; place-items: center; border: 1px solid #b7d9f5; border-radius: 16px; background-image: linear-gradient(rgba(0,115,207,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(0,115,207,.09) 1px,transparent 1px),radial-gradient(circle at center,#eaf6ff,white 70%); background-size: 24px 24px,24px 24px,auto; }
    .about-stamp strong { padding: 18px 23px; border: 2px solid var(--blue); color: var(--blue-deep); background: rgba(255,255,255,.88); font-size: 1.18rem; letter-spacing: .11em; }
    .about-copy h2 { margin: 9px 0 12px; font-size: clamp(2.1rem, 3.8vw, 3.3rem); line-height: 1.05; letter-spacing: -.05em; }
    .about-copy p { color: var(--muted); }
    .contact { color: white; background: var(--blue-deep); }
    .contact-grid { display: flex; justify-content: space-between; align-items: center; gap: 25px; }
    .contact h2 { margin: 9px 0 9px; font-size: clamp(2.3rem, 4vw, 3.6rem); line-height: 1.05; letter-spacing: -.05em; }
    .contact p { max-width: 650px; margin: 0; color: #d9ecfc; }
    .contact .eyebrow { color: #a8dbff; }
    .contact-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; flex: none; }
    .contact-actions a { color: white; font-weight: 800; text-decoration: none; }
    .contact-actions .button { border-color: white; color: var(--blue-deep); background: white; }
    .contact-actions .button:hover { color: white; background: transparent; }
    footer { padding: 23px 0; color: #d3e0ec; background: #071b2c; font-size: .82rem; }
    .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
    .footer-inner a { color: white; text-decoration: none; }
    .footer-links { display: flex; gap: 15px; flex-wrap: wrap; }
    @media (max-width: 900px) {
      .hero-grid { grid-template-columns: 1fr; gap: 25px; }
      .hero-copy { max-width: 730px; }
      .hero-image-wrap { max-width: 850px; }
      .classroom-intro,.detail-grid,.about-grid { grid-template-columns: 1fr; gap: 22px; }
      .subject-grid { grid-template-columns: repeat(3,1fr); }
      .detail-grid { gap: 20px; }
    }
    @media (max-width: 680px) {
      .wrap { width: min(var(--max), calc(100% - 30px)); }
      .nav { min-height: 66px; }
      .menu-toggle { display: inline-block; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; padding: 12px 15px 18px; border-bottom: 1px solid var(--line); background: white; box-shadow: 0 12px 20px rgba(7,55,100,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
      .nav-links a { padding: 8px; }
      .nav-links .nav-cta { text-align: center; }
      .hero { padding: 27px 0 41px; }
      .hero h1 { font-size: clamp(2.65rem, 12vw, 4rem); }
      .hero-copy p { font-size: 1rem; }
      .hero-image-wrap { padding: 7px; border-radius: 14px; }
      .hero-image-wrap:before { inset: -9px -8px 10px 9px; }
      .hero-image { aspect-ratio: 1.7 / 1; object-fit: cover; object-position: 86% center; }
      .promise-inner { align-items: flex-start; flex-direction: column; }
      .promise-list { gap: 9px 16px; }
      section { padding: 59px 0; }
      .subject-grid,.approach-grid { grid-template-columns: 1fr; }
      .subject-card { min-height: auto; }
      .course-row { grid-template-columns: 42px 1fr; }
      .course-row a { grid-column: 2; }
      .feature-panel,.music-panel { grid-template-columns: 1fr; }
      .music-panel { padding: 17px; }
      .music-note { min-height: 155px; }
      .music-note span { font-size: 5rem; }
      .contact-grid { align-items: flex-start; flex-direction: column; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *:before, *:after { transition: none !important; }
    }
  
    .page-intro { padding: 46px 0 18px; background: linear-gradient(180deg,#f8fbff 0%,white 100%); }
    .page-intro h1 { margin: 8px 0 12px; font-size: clamp(2.5rem,5vw,4rem); line-height: 1.04; letter-spacing: -.055em; }
    .page-intro p { max-width: 700px; margin: 0; color: var(--muted); }
    .page-actions { display:flex; gap:12px; flex-wrap:wrap; margin-top:22px; }
    .short-page { padding-top: 48px; }
    .short-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; }
    .short-card { overflow:hidden; border:1px solid var(--line); border-radius:14px; background:white; box-shadow:0 10px 28px rgba(7,55,100,.055); }
    .short-thumb { display:block; aspect-ratio:16/9; overflow:hidden; background:var(--pale-strong); }
    .short-thumb img { width:100%; height:100%; object-fit:cover; transition:transform .2s ease; }
    .short-thumb:hover img { transform:scale(1.035); }
    .short-copy { padding:16px; }
    .short-copy .eyebrow { font-size:.68rem; }
    .short-copy h3 { margin:6px 0 8px; font-size:1rem; line-height:1.35; }
    .short-meta { display:flex; justify-content:space-between; gap:10px; align-items:center; color:var(--muted); font-size:.8rem; }
    .short-meta a { color:var(--blue-deep); font-weight:800; text-decoration:none; white-space:nowrap; }
    .short-meta a:hover { text-decoration:underline; }
    .short-heading { margin:40px 0 16px; font-size:1.35rem; }
    .back-link { display:inline-block; margin-bottom:16px; color:var(--blue-deep); font-size:.9rem; font-weight:800; text-decoration:none; }
    .back-link:hover { text-decoration:underline; }
    .site-footer-nav { display:flex; align-items:center; gap:16px; flex-wrap:wrap; }
    .site-footer-nav a { color:white; text-decoration:none; }
    .site-footer-nav a:hover { text-decoration:underline; }
    @media (max-width:900px) { .short-grid { grid-template-columns:repeat(2,minmax(0,1fr)); } }
    @media (max-width:680px) { .short-grid { grid-template-columns:1fr; } .page-intro { padding-top:34px; } }

    .short-art { display:flex; height:100%; width:100%; align-items:center; justify-content:space-between; gap:14px; padding:18px 22px; color:white; background-image:radial-gradient(circle at 78% 24%,rgba(112,197,255,.5),transparent 34%),linear-gradient(130deg,#0b2741,#0878d1); }
    .short-index { align-self:flex-start; padding:5px 8px; border:1px solid rgba(255,255,255,.55); border-radius:6px; font-size:.8rem; font-weight:800; letter-spacing:.1em; }
    .short-note { font-size:4.3rem; line-height:1; text-shadow:0 4px 18px rgba(0,0,0,.18); }
    .short-brand { align-self:flex-end; font-size:.64rem; font-weight:800; letter-spacing:.13em; white-space:nowrap; }
    .short-card:nth-child(3n+2) .short-art { background-image:radial-gradient(circle at 78% 24%,rgba(154,218,255,.5),transparent 34%),linear-gradient(130deg,#073f6b,#1592d6); }
    .short-card:nth-child(3n) .short-art { background-image:radial-gradient(circle at 78% 24%,rgba(118,194,255,.45),transparent 34%),linear-gradient(130deg,#14304b,#345d91); }
    @media (max-width:680px) { .short-art { padding:14px 18px; } .short-note { font-size:3.6rem; } .short-brand { font-size:.56rem; } }