:root {
  --teal: #0d9488;
  --teal-dark: #0f766e;
  --teal-light: #14b8a6;
  --coral: #f97316;
  --coral-light: #fb923c;
  --bg: #fafbfc;
  --dark: #1a2332;
  --gray: #64748b;
  --white: #ffffff;
  --radius: 16px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans SC', sans-serif; background: var(--bg); color: var(--dark); line-height: 1.7; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid #e8edf2;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--dark); font-weight: 700; font-size: 1.1rem; }
.logo-icon { color: var(--teal); font-size: 1.3rem; }
.logo em { font-style: normal; color: var(--teal); }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { text-decoration: none; color: var(--gray); font-size: 0.9rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--teal); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--dark); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: 10px; font-size: 0.95rem; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer; transition: all 0.25s;
}
.btn-primary { background: var(--teal); color: var(--white); }
.btn-primary:hover { background: var(--teal-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(13,148,136,0.3); }
.btn-primary-sm { padding: 8px 18px; background: var(--teal); color: var(--white) !important; border-radius: 8px; }
.btn-secondary { background: transparent; color: var(--gray); border: 1px solid #dde4ea; }
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); }
.btn-full { width: 100%; }

.hero {
  position: relative; padding: 140px 0 100px; overflow: hidden;
  background: linear-gradient(160deg, #ecfdf5 0%, #fafbfc 50%, #fff7ed 100%);
}
.hero-pattern {
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(13,148,136,0.08) 0%, transparent 50%),
                    radial-gradient(circle at 80% 20%, rgba(249,115,22,0.06) 0%, transparent 40%);
}
.hero-grid {
  position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.pill {
  display: inline-block; background: rgba(13,148,136,0.1); color: var(--teal);
  padding: 6px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 600; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.2rem); font-weight: 700; line-height: 1.2; margin-bottom: 20px; }
.hero h1 span { color: var(--teal); }
.hero-text > p { color: var(--gray); font-size: 1.05rem; margin-bottom: 32px; max-width: 480px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.member-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.member-card {
  background: var(--white); border-radius: var(--radius); padding: 24px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06); border: 1px solid #eef2f6;
}
.member-card span { display: block; font-size: 0.85rem; color: var(--gray); margin-bottom: 4px; }
.member-card strong { font-size: 1.75rem; color: var(--teal); }
.m1 { transform: translateY(0); }
.m2 { transform: translateY(20px); }
.m3 { transform: translateY(-10px); }
.m4 { transform: translateY(10px); }

.section { padding: 80px 0; }
.section-alt { background: var(--white); }
.section-title { font-size: 1.75rem; font-weight: 700; margin-bottom: 40px; text-align: center; }

.intro-block { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.intro-block h2 { font-size: 1.75rem; margin-bottom: 12px; }
.intro-block p { color: var(--gray); }

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--white); border-radius: var(--radius); padding: 32px;
  border: 1px solid #eef2f6; transition: all 0.3s;
}
.card:hover { border-color: var(--teal); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(13,148,136,0.1); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 0.9rem; color: var(--gray); }

.features-list { max-width: 720px; margin: 0 auto; }
.feature-row {
  display: flex; gap: 24px; padding: 28px 0; border-bottom: 1px solid #eef2f6;
}
.feature-row:last-child { border-bottom: none; }
.feature-num { font-size: 1.5rem; font-weight: 700; color: var(--teal); opacity: 0.4; min-width: 40px; }
.feature-row h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.feature-row p { font-size: 0.9rem; color: var(--gray); }
.feature-row a { color: var(--teal); }

.persona-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.persona {
  text-align: center; padding: 32px 20px; background: var(--white);
  border-radius: var(--radius); border: 1px solid #eef2f6;
}
.persona-avatar { font-size: 2.5rem; margin-bottom: 12px; }
.persona h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.persona p { font-size: 0.85rem; color: var(--gray); }

.join-section { background: linear-gradient(135deg, var(--teal), var(--teal-dark)); color: var(--white); }
.join-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.join-text h2 { font-size: 1.75rem; margin-bottom: 12px; }
.join-text > p { opacity: 0.9; margin-bottom: 24px; }
.join-perks { list-style: none; }
.join-perks li { padding: 6px 0; opacity: 0.95; }
.join-form { display: flex; flex-direction: column; gap: 14px; }
.join-form input, .join-form select, .join-form textarea {
  padding: 14px 16px; border: none; border-radius: 10px; font-family: inherit; font-size: 0.95rem;
}
.join-form .btn-primary { background: var(--coral); }
.join-form .btn-primary:hover { background: var(--coral-light); }

.footer { padding: 32px 0; border-top: 1px solid #eef2f6; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
.footer p { font-size: 0.85rem; color: var(--gray); }
.footer a { color: var(--teal); text-decoration: none; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--gray); text-decoration: none; font-size: 0.85rem; }
.footer-links a:hover { color: var(--teal); }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 68px; left: 0; right: 0; background: var(--white); padding: 20px; gap: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  .hero-grid, .join-inner { grid-template-columns: 1fr; }
  .cards-3, .persona-grid { grid-template-columns: 1fr; }
  .member-cards { max-width: 360px; margin: 0 auto; }
}