:root{--bg: #FFF8E7;--card-bg: #FFFFFF;--primary: #FF8C42;--primary-dark: #E67A32;--primary-light: #FFF0E0;--safe-green: #81C784;--warn-yellow: #FFB74D;--danger-red: #E57373;--text-primary: #5D4037;--text-secondary: #8D6E63;--text-light: #BCAAA4;--shadow: 0 4px 16px rgba(93, 64, 55, .08);--shadow-lg: 0 8px 32px rgba(93, 64, 55, .12);--radius: 20px;--radius-sm: 14px;--font-xxl: 26px;--font-xl: 22px;--font-lg: 18px;--font-md: 16px;--font-sm: 14px;--font-xs: 12px;--nav-h: 68px;--header-h: 56px;--safe-bottom: env(safe-area-inset-bottom, 16px)}body,html,#app{width:100%;height:100%;overflow:hidden}.app-container{width:100%;height:100%;max-width:480px;margin:0 auto;background:var(--bg);position:relative;display:flex;flex-direction:column;overflow:hidden}.page-container{flex:1;position:relative;overflow:hidden}.page{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;pointer-events:none;transition:opacity .3s ease;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;padding-bottom:calc(var(--nav-h) + var(--safe-bottom) + 20px)}.page.active{opacity:1;pointer-events:auto}.page::-webkit-scrollbar{display:none}.bottom-nav{position:absolute;bottom:0;left:0;right:0;height:var(--nav-h);background:var(--card-bg);display:flex;align-items:center;justify-content:space-around;box-shadow:0 -2px 16px #0000000a;padding-bottom:var(--safe-bottom);z-index:100;flex-shrink:0}.nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:var(--font-xs);color:var(--text-light);cursor:pointer;padding:6px 18px;border-radius:12px;transition:all .2s;border:none;background:none;font-family:inherit}.nav-item.active{color:var(--primary);font-weight:700}.nav-item .nav-icon{font-size:22px}.btn{display:inline-flex;align-items:center;justify-content:center;border:none;cursor:pointer;font-family:inherit;font-weight:700;transition:all .15s;letter-spacing:.5px;gap:8px}.btn:active{transform:scale(.97)}.btn-primary{background:var(--primary);color:#fff;width:100%;height:56px;border-radius:28px;font-size:var(--font-lg);box-shadow:0 4px 16px #ff8c424d}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);width:100%;height:56px;border-radius:28px;font-size:var(--font-lg)}.btn-sm{height:44px;border-radius:22px;font-size:var(--font-md);padding:0 20px}.btn-icon{width:44px;height:44px;border-radius:50%;background:#f5f0eb;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;flex-shrink:0}.toast{position:fixed;top:60px;left:50%;transform:translate(-50%);background:#5d4037;color:#fff;padding:12px 28px;border-radius:24px;font-size:var(--font-md);font-weight:600;z-index:9999;opacity:0;transition:opacity .3s;pointer-events:none;white-space:nowrap}.toast.show{opacity:1}.typing-indicator{display:flex;gap:5px;padding:4px 0}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:var(--text-light);animation:bounce 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-7px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.06)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes safePulse{0%,to{box-shadow:0 0 #81c78466}50%{box-shadow:0 0 0 16px #81c78400}}.fade-in-up{animation:fadeInUp .4s ease forwards}