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768px){.nav-inner[data-v-d5cc0d19]{padding:0 12px}.nav-links[data-v-d5cc0d19],.nav-right[data-v-d5cc0d19]{display:none}.hamburger[data-v-d5cc0d19]{display:flex}.brand-sub[data-v-d5cc0d19]{display:none}}@media (max-width: 480px){.brand-text[data-v-d5cc0d19]{display:none}}.app-footer[data-v-6232863f]{width:100%;background:#fffbf5;border-top:1px solid rgba(255,140,66,.08);padding:24px 0}.footer-inner[data-v-6232863f]{max-width:1200px;margin:0 auto;padding:0 24px;text-align:center}.footer-copyright[data-v-6232863f]{font-size:13px;color:#999;margin:0 0 8px;line-height:1.6}.footer-icp[data-v-6232863f]{font-size:12px;color:#aaa;margin:0;line-height:1.6}.footer-icp a[data-v-6232863f]{color:#aaa;text-decoration:none;transition:color .2s}.footer-icp a[data-v-6232863f]:hover{color:#ff8c42}.footer-sep[data-v-6232863f]{margin:0 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#BBBBBB;--border-subtle: rgba(255,140,66,.08);--border-default: rgba(255,140,66,.15);--shadow-card: 0 4px 24px rgba(255,140,66,.06);--shadow-glow: 0 0 24px rgba(255,140,66,.08)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,PingFang SC,Segoe UI,Roboto,sans-serif;background:var(--surface-0);color:var(--text-primary);min-height:100vh}#app{min-height:100vh}.course-card,.feature-item,.setting-card{background:var(--surface-2);border:1px solid var(--border-subtle);border-radius:12px;box-shadow:var(--shadow-card);transition:all .3s ease}.course-card:hover,.feature-item:hover{border-color:var(--color-brand-500);box-shadow:var(--shadow-card),var(--shadow-glow);transform:translateY(-2px)}.btn-orange{background:var(--color-brand-500)!important;border-color:var(--color-brand-500)!important;color:#fff!important}.btn-orange:hover{background:var(--color-brand-600)!important}.orange-bg{background:var(--color-brand-500)}