:root {
  --ink: #12383b;
  --ink-soft: #46686a;
  --paper: #fbfdfb;
  --mist: #eef7f4;
  --cream: #fff7eb;
  --line: #dceae5;
  --teal: #0b7b75;
  --teal-dark: #07554f;
  --mint: #bde6dc;
  --orange: #e28e53;
  --white: #fff;
  --shadow: 0 18px 50px rgba(16, 74, 73, .10);
  --radius-lg: 30px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Segoe UI", system-ui, -apple-system, sans-serif; line-height: 1.65; }
body:has(.site-nav.is-open) { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #f0ae6b; outline-offset: 4px; }
.container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 20; padding: 10px 16px; color: var(--white); background: var(--teal-dark); border-radius: 8px; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(220,234,229,.85); background: rgba(251,253,251,.92); backdrop-filter: blur(16px); }
.header-inner { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand-link { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 260px; }
.brand-logo { width: 88px; height: auto; object-fit: contain; }
.brand-copy { display: grid; gap: 0; }
.brand-copy strong { font-size: 15px; letter-spacing: -.01em; }
.brand-copy small { color: var(--ink-soft); font-size: 11px; }
.site-nav { display: flex; align-items: center; gap: 24px; font-size: 14px; }
.site-nav a { text-decoration: none; color: var(--ink-soft); }
.site-nav a:hover { color: var(--teal-dark); }
.site-nav .nav-cta { padding: 10px 16px; color: var(--white); background: var(--teal); border-radius: 999px; }
.menu-toggle { display: none; border: 1px solid var(--line); padding: 9px 13px; color: var(--ink); background: var(--white); border-radius: 10px; cursor: pointer; }

.section { padding: 110px 0; }
.section-soft { background: var(--mist); }
.section-cream { background: var(--cream); }
.hero { padding-top: 82px; padding-bottom: 96px; overflow: hidden; }
.hero-grid, .split-grid, .contact-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; gap: clamp(42px, 7vw, 94px); }
.hero-copy h1 { max-width: 680px; margin: 16px 0 22px; font-size: clamp(2.6rem, 5.5vw, 5.3rem); line-height: 1.02; letter-spacing: -.055em; }
.kicker { margin: 0; color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.hero-lead { max-width: 610px; margin: 0; color: var(--ink-soft); font-size: clamp(1.03rem, 1.6vw, 1.23rem); }
.micro-note { margin-top: 18px; color: #6a8583; font-size: 12px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-weight: 700; font-size: 14px; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(7,85,79,.15); }
.button-primary { color: var(--white); background: var(--teal); }
.button-ghost { color: var(--teal-dark); background: transparent; border-color: #a8c9c1; }
.image-frame { position: relative; overflow: hidden; margin: 0; border-radius: var(--radius-lg); background: var(--mist); }
.image-frame img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual { min-height: 480px; box-shadow: var(--shadow); transform: rotate(1.2deg); }
.hero-visual img { min-height: 480px; }
.hero-visual figcaption { position: absolute; right: 16px; bottom: 14px; max-width: 230px; padding: 7px 10px; color: #234c4c; background: rgba(255,255,255,.8); border-radius: 8px; font-size: 11px; }
.watermark { position: absolute; right: 12px; top: 12px; padding: 3px 7px; color: rgba(255,255,255,.78); background: rgba(8,66,65,.28); border-radius: 5px; font-size: 10px; letter-spacing: .08em; }

.section-heading { max-width: 730px; margin-bottom: 46px; }
.section-heading.compact { margin-bottom: 36px; }
.section-heading h2, .guide-grid h2, .contact-grid h2 { margin: 12px 0 14px; font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1.08; letter-spacing: -.04em; }
.section-heading p:not(.kicker), .guide-grid > div > p, .contact-grid > div > p { margin: 0; color: var(--ink-soft); }
.split-grid { align-items: start; }
.feature-card { padding: 28px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(20,75,73,.05); }
.split-grid .feature-card { min-height: 210px; }
.feature-icon { display: grid; width: 38px; height: 38px; place-items: center; margin-bottom: 22px; color: var(--teal-dark); background: var(--mint); border-radius: 50%; font-size: 11px; font-weight: 800; }
h2, h3 { text-wrap: balance; }
h3 { margin: 0 0 9px; font-size: 1.24rem; line-height: 1.2; letter-spacing: -.02em; }
.feature-card p, .topic-card p, .guide-cards p, .tool-card p, .partner-card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.visual-pair { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 40px; align-items: center; margin-top: 68px; }
.visual-pair .image-frame { height: 360px; }
.visual-copy { max-width: 480px; }
.visual-copy h3 { font-size: clamp(1.6rem, 3vw, 2.35rem); }
.text-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; color: var(--teal-dark); font-size: 14px; font-weight: 800; text-decoration: none; }
.text-link:hover { text-decoration: underline; }

.topic-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.topic-card { overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); }
.topic-card .image-frame { height: 180px; border-radius: 0; }
.topic-card-tall .image-frame { height: 230px; }
.topic-body { padding: 22px; }
.topic-body p { min-height: 126px; }
.swatch-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; max-width: 560px; margin-top: 42px; }
.swatch-row figure { position: relative; margin: 0; text-align: center; }
.swatch-row img { width: 100%; border-radius: 50%; }
.swatch-row figcaption { margin-top: 8px; color: var(--ink-soft); font-size: 12px; }

.guide-grid { align-items: center; }
.check-list { display: grid; gap: 13px; margin: 28px 0 0; padding: 0; list-style: none; }
.check-list li { padding-left: 31px; position: relative; color: var(--ink-soft); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; display: grid; width: 21px; height: 21px; place-items: center; color: var(--white); background: var(--teal); border-radius: 50%; font-size: 12px; }
.check-list strong { color: var(--ink); }
.guide-image { height: 420px; }
.guide-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 48px; }
.guide-cards article { padding: 14px; background: rgba(255,255,255,.72); border: 1px solid #f1e4ce; border-radius: var(--radius-md); }
.guide-cards img { width: 100%; height: 150px; object-fit: cover; border-radius: 12px; margin-bottom: 17px; }

.tool-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.tool-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); }
.tool-card img { width: 100%; height: 180px; object-fit: cover; }
.tool-card div { padding: 20px; }

.sponsor-section { background: #104d4e; color: var(--white); }
.sponsor-card { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 34px; align-items: start; }
.sponsor-mark { display: grid; width: 86px; height: 86px; place-items: center; color: #104d4e; background: #c7efe2; border-radius: 24px; font-weight: 900; letter-spacing: .1em; }
.sponsor-card .kicker { color: #9fe0ce; }
.sponsor-card h2 { margin: 12px 0 18px; font-size: clamp(1.8rem, 3.4vw, 3rem); line-height: 1.1; letter-spacing: -.04em; }
.sponsor-card p { max-width: 920px; color: #d7eeea; }
.sponsor-card .sponsor-backlink { color: #ffe4a9; font-weight: 800; text-decoration-color: rgba(255,228,169,.5); }

.partners-section { background: var(--mist); }
.partners-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.partner-card { padding: 22px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); }
.partner-card h3 { min-height: 45px; }
.partner-card a, .tool-partner a { color: var(--teal-dark); text-decoration-color: #9bcfc3; }
.tool-partner { margin-top: 22px; padding: 25px 28px; background: #d9f0e9; border-radius: var(--radius-md); }
.tool-partner h3 { margin-bottom: 7px; }
.tool-partner p { margin: 0; color: var(--ink-soft); }

.contact-section { background: var(--cream); }
.contact-form { display: grid; gap: 9px; padding: 30px; background: var(--white); border: 1px solid #f0e4ce; border-radius: var(--radius-md); box-shadow: var(--shadow); }
.contact-form label { color: var(--ink); font-size: 13px; font-weight: 800; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px 13px; border: 1px solid #cbded8; border-radius: 10px; color: var(--ink); background: #fcfffe; font: inherit; }
.contact-form textarea { resize: vertical; min-height: 140px; }
.contact-form button { border: 0; margin-top: 8px; }
.form-help { margin: 1px 0 0; color: #6d8581; font-size: 11px; }

.site-footer { padding: 56px 0 25px; color: #d7eeea; background: #0c3335; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 42px; }
.footer-grid img { width: 160px; margin-bottom: 18px; }
.footer-grid p { max-width: 360px; margin: 0; color: #a9cfca; font-size: 13px; }
.footer-grid h2 { margin: 0 0 13px; color: #fff; font-size: 14px; }
.footer-grid a { display: block; width: fit-content; margin: 7px 0; color: #bde5dc; font-size: 13px; text-decoration: none; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; margin-top: 44px; padding-top: 18px; border-top: 1px solid rgba(189,229,220,.18); color: #9fc5bf; font-size: 11px; }

@media (max-width: 1080px) {
  .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .partners-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .section { padding: 80px 0; }
  .container { width: min(var(--container), calc(100% - 34px)); }
  .header-inner { min-height: 70px; }
  .brand-link { min-width: 0; }
  .brand-logo { width: 74px; }
  .brand-copy small { display: none; }
  .menu-toggle { display: block; }
  .site-nav { position: fixed; inset: 70px 0 auto 0; display: none; padding: 22px 20px 26px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 14px 28px rgba(8,65,65,.1); }
  .site-nav.is-open { display: grid; gap: 4px; }
  .site-nav a { padding: 12px 6px; }
  .site-nav .nav-cta { padding: 12px 14px; text-align: center; }
  .hero-grid, .split-grid, .contact-grid, .visual-pair { grid-template-columns: 1fr; gap: 34px; }
  .hero-copy h1 { font-size: clamp(2.7rem, 11vw, 4.9rem); }
  .hero-visual { min-height: 350px; transform: none; }
  .hero-visual img { min-height: 350px; }
  .visual-pair .image-frame { height: 300px; }
  .guide-image { height: 320px; }
  .sponsor-card { grid-template-columns: 1fr; gap: 20px; }
  .sponsor-mark { width: 66px; height: 66px; border-radius: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
}
@media (max-width: 540px) {
  .topic-grid, .tool-grid, .partners-grid, .guide-cards { grid-template-columns: 1fr; }
  .topic-card .image-frame, .topic-card-tall .image-frame { height: 220px; }
  .topic-body p { min-height: 0; }
  .swatch-row { gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > div:first-child { grid-column: auto; }
  .contact-form { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}