:root{--color-primary:#111827;--color-accent:#6257ff;--color-success:#16a34a;--color-danger:#ef4444;--color-bg:#f5f7fb;--color-text:#0f172a;--color-text-secondary:#64748b;--color-border:#e2e8f0;--shadow:0 16px 40px rgba(15,23,42,.08);--shadow-strong:0 24px 70px rgba(15,23,42,.18);--font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei",Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{min-height:100%;overflow-x:hidden}body{font-family:var(--font-sans);color:var(--color-text);background:#e9edf5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-tap-highlight-color:transparent}button,input,textarea{font-family:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.page-shell{min-height:100dvh;max-width:520px;margin:0 auto;background:radial-gradient(circle at 18% -8%,#e8e5ff 0,transparent 34%),linear-gradient(180deg,#f8fafc 0%,#eef2f7 100%)}.app-page{letter-spacing:-.01em}.hero-card{background:linear-gradient(145deg,#111827 0%,#1e1b4b 56%,#6257ff 100%);box-shadow:var(--shadow-strong)}.nav-bar{position:sticky;top:0;z-index:40;height:50px;display:flex;align-items:center;padding:0 16px;background:rgba(248,250,252,.86);border-bottom:1px solid rgba(148,163,184,.14);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.nav-bar .back{width:36px;height:36px;border-radius:15px;display:inline-flex;align-items:center;justify-content:center;color:#0f172a;background:rgba(255,255,255,.86);border:1px solid rgba(226,232,240,.9);font-size:26px;font-weight:700;box-shadow:0 8px 20px #0f172a0d}.nav-bar .title{flex:1;text-align:center;font-size:17px;font-weight:1000}.nav-placeholder{width:36px}.btn,.primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:16px;font-weight:900}.btn-primary{color:#fff;background:linear-gradient(135deg,#111827,#6257ff);box-shadow:0 14px 24px #6257ff38;padding:0 18px;height:46px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--color-text-secondary);text-align:center}.empty-icon{width:62px;height:62px;border-radius:22px;display:flex;align-items:center;justify-content:center;background:#fff;box-shadow:var(--shadow);font-size:30px}.spinner{width:28px;height:28px;border:3px solid rgba(99,102,241,.18);border-top-color:#6257ff;border-radius:50%;animation:spin .75s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:10000;max-width:calc(100vw - 48px);padding:12px 20px;border-radius:16px;background:rgba(15,23,42,.9);color:#fff;font-size:14px;font-weight:700;line-height:1.5;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}input,textarea{font-size:16px}@media (max-width:520px){.page-shell{max-width:none}}