:root {
    --ink: #1f2a27;
    --muted: #63706b;
    --deep: #173b31;
    --green: #285846;
    --green-2: #4e765d;
    --cream: #f5f0e6;
    --paper: #fffaf0;
    --line: rgba(31, 42, 39, .12);
    --shadow: 0 22px 55px rgba(31, 42, 39, .12);
    --radius: 28px;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: var(--cream);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.narrow { max-width: 860px; }
.skip-link { position: absolute; left: -999px; top: 12px; background: var(--deep); color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 99; }
.skip-link:focus { left: 12px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(245, 240, 230, .88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 76px; }
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-mark { width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center; background: var(--deep); color: var(--paper); box-shadow: var(--shadow); }
.brand strong { display: block; letter-spacing: .08em; }
.brand em { display: block; color: var(--muted); font-size: 12px; font-style: normal; font-weight: 500; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a { color: var(--muted); padding: 9px 13px; border-radius: 999px; font-size: 15px; }
.site-nav a:hover, .site-nav a.is-active { background: var(--deep); color: var(--paper); }
.nav-toggle { display: none; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 999px; padding: 8px 14px; }
.hero { padding: 72px 0 56px; }
.hero-grid, .split, .recommendation, .contact-card, .contact-layout, .mosaic, .path-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero-copy h1, .page-hero h1 { font-size: clamp(40px, 6vw, 76px); line-height: 1.05; margin: 10px 0 22px; letter-spacing: -.04em; }
.hero-copy p, .page-hero p, .section-head p, .mosaic-copy p { color: var(--muted); font-size: 18px; }
.eyebrow { color: var(--green); letter-spacing: .18em; text-transform: uppercase; font-size: 13px; font-weight: 800; margin: 0 0 8px; }
.hero-art { background: radial-gradient(circle at 35% 25%, rgba(255,255,255,.95), rgba(255,255,255,.35) 36%, rgba(40,88,70,.12)); border-radius: 42px; padding: 18px; box-shadow: var(--shadow); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; padding: 12px 22px; border: 1px solid var(--deep); font-weight: 800; cursor: pointer; }
.btn.primary { background: var(--deep); color: var(--paper); }
.btn.ghost { background: transparent; color: var(--deep); }
.domain-line { margin-top: 22px; color: var(--muted); font-size: 14px; }
.section { padding: 78px 0; }
.section.soft { background: rgba(255, 250, 240, .64); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section.dark { background: var(--deep); color: var(--paper); }
.section.dark .eyebrow, .section.dark p { color: rgba(255, 250, 240, .76); }
.section-head { margin-bottom: 34px; }
.section-head h2, .split h2, .mosaic-copy h2, .recommendation h2, .path-grid h2 { font-size: clamp(30px, 4vw, 52px); line-height: 1.12; margin: 8px 0 14px; letter-spacing: -.03em; }
.card-grid { display: grid; gap: 24px; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card-grid.two { grid-template-columns: repeat(2, 1fr); }
.content-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: 0 16px 40px rgba(31,42,39,.07); }
.content-card img { width: 100%; aspect-ratio: 16 / 10.5; object-fit: cover; background: #e6ded0; }
.card-body { padding: 24px; }
.card-body h3 { margin: 0 0 10px; font-size: 22px; line-height: 1.3; }
.card-body p { color: var(--muted); margin: 0 0 16px; }
.pill, .filter-row span { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 13px; color: var(--green); background: rgba(255,255,255,.55); }
.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.feature-list li { background: var(--paper); border: 1px solid var(--line); border-radius: 24px; padding: 22px; }
.feature-list strong, .feature-list span { display: block; }
.feature-list span { color: var(--muted); margin-top: 6px; }
.rounded-img, .mosaic img { border-radius: var(--radius); box-shadow: var(--shadow); background: var(--paper); }
.mosaic { align-items: stretch; }
.mosaic-copy { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; display: grid; align-content: center; }
.timeline { margin: 0; padding: 0; list-style: none; display: grid; gap: 16px; }
.timeline li { border: 1px solid rgba(255,255,255,.18); border-radius: 24px; padding: 18px; background: rgba(255,255,255,.05); }
.timeline span { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 14px; background: rgba(255,255,255,.12); margin-right: 10px; }
.timeline strong { font-size: 20px; }
.timeline p { margin: 8px 0 0; }
.timeline.compact li { background: rgba(255,255,255,.07); }
.quote-card { background: var(--deep); color: var(--paper); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.quote-card span { color: rgba(255,250,240,.72); }
.quote-card strong { display: block; font-size: 34px; line-height: 1.14; margin: 10px 0; }
.learning-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.learning-strip a { background: var(--paper); border: 1px solid var(--line); border-radius: 24px; padding: 24px; }
.learning-strip strong, .learning-strip span { display: block; }
.learning-strip span { color: var(--muted); margin-top: 6px; }
.faq-list { display: grid; gap: 14px; }
details { background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 18px 22px; }
summary { cursor: pointer; font-weight: 800; }
details p { color: var(--muted); margin-bottom: 0; }
.contact-band { padding-top: 42px; }
.contact-card { background: var(--deep); color: var(--paper); border-radius: 34px; padding: 38px; }
.contact-card p, .contact-card .eyebrow { color: rgba(255,250,240,.74); }
.page-hero { padding: 78px 0 58px; background: radial-gradient(circle at 80% 10%, rgba(78,118,93,.28), transparent 42%); }
.values-grid, .course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.values-grid article, .course-card, .contact-panel, .message-form { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.values-grid article span, .course-card span { color: var(--green); font-weight: 900; letter-spacing: .14em; }
.values-grid article h2, .course-card h2, .contact-panel h2 { margin: 10px 0; font-size: 26px; }
.values-grid article p, .course-card p, .contact-panel p, .form-note { color: var(--muted); }
.filter-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.topic-map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.topic-item { background: var(--paper); border: 1px solid var(--line); border-radius: 26px; overflow: hidden; }
.topic-item div { padding: 18px; }
.topic-item h2 { margin: 0 0 6px; font-size: 22px; }
.topic-item p { margin: 0; color: var(--muted); font-size: 15px; }
.course-grid { grid-template-columns: repeat(4, 1fr); align-items: stretch; }
.course-card ul { margin: 16px 0 0; padding-left: 18px; color: var(--muted); }
.contact-layout { align-items: start; }
.message-form { display: grid; gap: 16px; }
.message-form label { display: grid; gap: 7px; font-weight: 800; }
.message-form input, .message-form select, .message-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 16px; padding: 12px 14px; background: #fffdf7; color: var(--ink); }
.site-footer { background: #122d26; color: rgba(255,250,240,.78); padding: 52px 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr 1fr; gap: 34px; }
.footer-brand { color: var(--paper); font-size: 24px; margin-bottom: 10px; }
.site-footer h2 { color: var(--paper); font-size: 16px; margin: 0 0 10px; }
.site-footer a { display: block; margin: 6px 0; }
.update-time { color: var(--paper); font-weight: 800; }
@media (max-width: 980px) {
    .hero-grid, .split, .recommendation, .contact-card, .contact-layout, .mosaic, .path-grid { grid-template-columns: 1fr; }
    .card-grid.three, .card-grid.two, .learning-strip, .values-grid, .course-grid, .footer-grid { grid-template-columns: 1fr 1fr; }
    .topic-map { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
    .container { width: min(100% - 28px, var(--max)); }
    .header-inner { min-height: 68px; }
    .nav-toggle { display: inline-flex; }
    .site-nav { position: absolute; left: 14px; right: 14px; top: 72px; display: none; flex-direction: column; align-items: stretch; background: var(--paper); border: 1px solid var(--line); border-radius: 24px; padding: 12px; box-shadow: var(--shadow); }
    .site-nav.is-open { display: flex; }
    .site-nav a { padding: 12px 14px; }
    .hero, .page-hero { padding: 48px 0 38px; }
    .section { padding: 54px 0; }
    .card-grid.three, .card-grid.two, .learning-strip, .values-grid, .course-grid, .footer-grid, .topic-map { grid-template-columns: 1fr; }
    .hero-copy h1, .page-hero h1 { font-size: 42px; }
    .section-head h2, .split h2, .mosaic-copy h2, .recommendation h2, .path-grid h2 { font-size: 34px; }
    .contact-card { padding: 28px; }
}