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:root{--primary:#5850ec;--on-primary:#fff;--primary-container:#eef2ff;--on-primary-container:#3531a8;--secondary:#64748b;--on-secondary:#fff;--secondary-container:#f1f5f9;--on-secondary-container:#334155;--tertiary:#9061f9;--on-tertiary:#fff;--tertiary-container:#f5f3ff;--on-tertiary-container:#5b21b6;--surface:#fff;--on-surface:#0f172a;--surface-container:#f8fafc;--surface-container-high:#f1f5f9;--outline:#e2e8f0;--outline-variant:#f1f5f9;--error:#ef4444;--on-error:#fff;--error-container:#fef2f2;--on-error-container:#991b1b;--success:#22c55e;--warning:#f59e0b;--info:#3b82f6;--douyin:#fe2c55;--xhs:#ff2442;--tiktok:#000;--instagram:#e4405f;--primary-gradient:linear-gradient(135deg, #5850ec, #9061f9);--cat-domestic:linear-gradient(135deg, #5850ec, #9061f9);--cat-offline:linear-gradient(135deg, #3b82f6, #06b6d4);--cat-official:linear-gradient(135deg, #f97316, #ef4444);--shadow-sm:0 1px 3px #0000001a;--shadow-md:0 4px 12px #00000026;--shadow-primary:0 4px 15px #5850ec59;--shadow-lg:0 8px 24px #0003;--safe-top:44px;--safe-bottom:34px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--surface-container-high);color:var(--on-surface);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;overflow-x:hidden}::-webkit-scrollbar{display:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes spin{to{transform:rotate(360deg)}}.spinner{border:2px solid #5850ec1a;border-top-color:var(--primary);border-radius:50%;width:20px;height:20px;animation:.8s linear infinite spin}.fade-in{animation:.3s ease-out forwards fadeIn}.slide-in{animation:.3s ease-out forwards slideInRight}.pulse{animation:2s infinite pulse}.card{background:var(--surface);box-shadow:var(--shadow-sm);border-radius:16px;padding:16px;transition:box-shadow .2s,transform .2s}.card:active{transform:scale(.98)}.btn-primary{background:var(--primary-gradient);color:var(--on-primary);box-shadow:var(--shadow-primary);cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:600;transition:transform .1s;display:flex}.btn-primary:active{transform:scale(.97)}.btn-ghost{color:var(--primary);border:1px solid var(--outline);cursor:pointer;background:0 0;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:500;display:flex}.badge{border-radius:999px;padding:4px 8px;font-size:10px;font-weight:600}.app-shell{background:var(--surface-container);flex-direction:column;width:100%;max-width:640px;min-height:100vh;margin:0 auto;display:flex;position:relative;overflow-x:hidden}.content-area{flex:1;width:100%;padding-bottom:100px}.tab-bar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--outline);width:100%;max-width:640px;height:72px;padding:0 12px;padding-bottom:env(safe-area-inset-bottom);z-index:1000;background:#fffffff2;justify-content:space-between;align-items:center;margin:0 auto;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 12px #0000000d}@media (max-width:640px){.app-shell,.tab-bar{max-width:100vw}}.tab-item{color:var(--secondary);cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:4px;padding:8px 0;font-size:10px;font-weight:500;transition:all .2s;display:flex}.tab-item.active{color:var(--primary);transform:translateY(-2px)}.tab-item.active svg{stroke:var(--primary);fill:var(--primary-container)}.tab-center-btn{background:var(--primary-gradient);color:#fff;width:52px;height:52px;box-shadow:var(--shadow-primary);border:4px solid var(--surface);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;margin-top:-30px;transition:transform .2s;display:flex}.tab-center-btn:active{transform:scale(.9)rotate(45deg)}