*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --green: #4CAF82; --green-dark: #3a9e6f; --green-light: #E8F8EF;
  --text: #1A1A2E; --sub: #555; --muted: #888; --bg: #F7F8FA; --white: #fff;
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans", "Noto Sans CJK SC", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.9); backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid #eee;
  z-index: 100; padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.nav-logo .emoji { font-size: 24px; }
.nav-logo .name { font-size: 16px; font-weight: 700; color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { text-decoration: none; font-size: 14px; color: var(--sub); transition: color .2s; }
.nav-links a:hover { color: var(--green); }
.lang-switcher { display: flex; gap: 4px; flex-shrink: 0; }
.lang-switcher a {
  text-decoration: none; font-size: 12px; font-weight: 600;
  color: var(--muted); padding: 4px 8px; border-radius: 6px; transition: background .2s, color .2s;
}
.lang-switcher a:hover { color: var(--green); }
.lang-switcher a.active { background: var(--green-light); color: var(--green); }

/* Inner pages nav (non-fixed) */
.inner-nav {
  background: #fff; border-bottom: 1px solid #eee;
  padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.nav-back { font-size: 14px; color: var(--green); text-decoration: none; flex-shrink: 0; }

/* ── HERO ── */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  padding: 100px 24px 60px;
  background: linear-gradient(160deg, #fff 0%, var(--green-light) 100%);
}
.hero-icon {
  width: 120px; height: 120px; border-radius: 28px; background: var(--green-light);
  display: flex; align-items: center; justify-content: center; font-size: 64px;
  margin-bottom: 28px; box-shadow: 0 12px 40px rgba(76,175,130,.20);
}
.hero-badge {
  display: inline-block; background: var(--green-light); color: var(--green);
  font-size: 13px; font-weight: 600; border-radius: 20px; padding: 4px 14px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(36px,6vw,58px); font-weight: 800; line-height: 1.15; color: var(--text); margin-bottom: 8px; }
.hero-sub { font-size: 18px; color: var(--muted); font-weight: 500; margin-bottom: 20px; letter-spacing: .5px; }
.hero p { font-size: 18px; color: var(--sub); max-width: 520px; margin: 0 auto 40px; line-height: 1.8; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px;
  border-radius: 14px; font-size: 16px; font-weight: 700; text-decoration: none;
  transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 4px 16px rgba(76,175,130,.35); }
.btn-secondary { background: #fff; color: var(--text); border: 2px solid #E0E0E0; }

/* ── SECTIONS ── */
section { padding: 80px 24px; }
.section-label { text-align: center; font-size: 13px; font-weight: 700; color: var(--green); letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 12px; }
.section-title { text-align: center; font-size: clamp(26px,4vw,36px); font-weight: 800; color: var(--text); margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--sub); font-size: 16px; max-width: 480px; margin: 0 auto 60px; }

.features-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(280px,1fr)); gap: 24px; max-width: 1000px; margin: 0 auto; }
.feature-card { background: var(--white); border-radius: 20px; padding: 32px 28px; box-shadow: 0 2px 16px rgba(0,0,0,.06); transition: transform .2s,box-shadow .2s; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,.10); }
.feature-icon { width: 56px; height: 56px; border-radius: 16px; background: var(--green-light); display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 20px; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--sub); line-height: 1.75; }

.data-section { background: var(--white); }
.data-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 20px; max-width: 900px; margin: 0 auto; }
.data-card { border: 2px solid var(--green-light); border-radius: 16px; padding: 28px 24px; text-align: center; }
.data-card .flag { font-size: 40px; margin-bottom: 12px; }
.data-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.data-card p { font-size: 13px; color: var(--muted); }

.lang-section { background: var(--green-light); }
.lang-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; max-width: 600px; margin: 0 auto; }
.lang-pill { background: var(--white); border-radius: 40px; padding: 10px 22px; font-size: 15px; font-weight: 600; color: var(--text); box-shadow: 0 2px 8px rgba(0,0,0,.06); }

.privacy-strip { background: var(--green); color: #fff; text-align: center; padding: 60px 24px; }
.privacy-strip h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.privacy-strip p { font-size: 16px; opacity: .88; max-width: 480px; margin: 0 auto 28px; }
.privacy-strip .btn-outline { display: inline-block; border: 2px solid rgba(255,255,255,.7); color: #fff; border-radius: 12px; padding: 12px 28px; font-size: 15px; font-weight: 700; text-decoration: none; transition: background .2s; }
.privacy-strip .btn-outline:hover { background: rgba(255,255,255,.15); }

footer { background: var(--text); color: rgba(255,255,255,.6); text-align: center; padding: 40px 24px; font-size: 13px; line-height: 2; }
footer a { color: rgba(255,255,255,.6); text-decoration: none; }
footer a:hover { color: var(--green); }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 16px; flex-wrap: wrap; }

/* ── INNER PAGES ── */
.container { max-width: 760px; margin: 0 auto; padding: 60px 24px 80px; }
.page-header { border-radius: 20px; padding: 40px 36px; margin-bottom: 40px; }
.page-header-green { background: var(--green); color: #fff; }
.page-header-grad { background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%); color: #fff; }
.page-header .icon { font-size: 40px; margin-bottom: 12px; }
.page-header h1 { font-size: 28px; font-weight: 800; margin-bottom: 6px; }
.page-header p { opacity: .85; font-size: 14px; }
.card { background: #fff; border-radius: 16px; padding: 32px 28px; margin-bottom: 20px; box-shadow: 0 2px 12px rgba(0,0,0,.05); }
.card h2 { font-size: 18px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.card h2 .e { font-size: 22px; }
.card p { font-size: 15px; color: var(--sub); margin-bottom: 12px; }
.card p:last-child { margin-bottom: 0; }
.card ul { list-style: none; padding: 0; }
.card ul li { font-size: 15px; color: var(--sub); padding: 6px 0 6px 20px; position: relative; }
.card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 700; }
.highlight { background: var(--green-light); border-left: 4px solid var(--green); border-radius: 0 10px 10px 0; padding: 16px 20px; margin: 16px 0; font-size: 15px; color: var(--text); font-weight: 600; }
.faq-item { margin-bottom: 24px; }
.faq-item:last-child { margin-bottom: 0; }
.faq-q { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.faq-a { font-size: 14px; color: var(--sub); }
.gh-link { display: flex; align-items: center; gap: 12px; background: var(--bg); border-radius: 12px; padding: 16px 20px; text-decoration: none; color: var(--text); border: 1px solid #E5E5E5; transition: border-color .2s,box-shadow .2s; margin-top: 12px; }
.gh-link:hover { border-color: var(--green); box-shadow: 0 0 0 3px var(--green-light); }
.gh-link .gh-icon { font-size: 28px; }
.gh-link .gh-text strong { display: block; font-size: 15px; }
.gh-link .gh-text span { font-size: 13px; color: var(--muted); }
.inner-footer { text-align: center; font-size: 13px; color: var(--muted); padding: 32px 24px; }
.inner-footer a { color: var(--green); text-decoration: none; }

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 34px; }
  .lang-switcher a { padding: 4px 6px; font-size: 11px; }
}