:root {
    --color-primary: #dff3ef;
    --color-accent: #17343b;
    --color-highlight: #e6533f;
    --color-secondary: #0b8178;
    --color-bg: #f4f8f7;
    --color-card: #ffffff;
    --color-border: #c8ddd8;
    --color-text: #17343b;
    --color-text-muted: #607574;
    --font-heading: 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
}

body.lang-zh { background: #f4f8f7; }
.main-nav { background: rgba(244,248,247,.95); border-bottom-color: #c8ddd8; }
.nav-link.active { background: #dff3ef; color: #075f59; }
.nav-logo { color: #17343b; }
.card::before { background: linear-gradient(90deg,#0b8178,#e6533f,#e4ac36); }
.btn-primary { background: #e6533f; }
.btn-secondary { background: #0b8178; }
.btn-outline { border-color: #17343b; color: #17343b; }
.btn-outline:hover { background: #17343b; }