:root{--bg: #f6f7fb;--bg-grad: radial-gradient(1200px 600px at 20% -10%, #dfe7ff 0%, transparent 55%), radial-gradient(1000px 500px at 110% 20%, #efe4ff 0%, transparent 50%);--card: rgba(255, 255, 255, .72);--card-border: rgba(20, 30, 60, .08);--text: #17203a;--text-dim: #5d6780;--accent: #3d6bff;--accent2: #7a3dff;--ok: #0f9d63;--warn: #c77d00;--danger: #d43d51;--shadow: 0 10px 30px rgba(23, 32, 58, .08);--ring-rgb: 61, 107, 255}[data-theme=dark]{--bg: #0a0e1a;--bg-grad: radial-gradient(1200px 600px at 20% -10%, rgba(91, 140, 255, .16) 0%, transparent 55%), radial-gradient(1000px 500px at 110% 20%, rgba(139, 91, 255, .13) 0%, transparent 50%);--card: rgba(20, 27, 48, .66);--card-border: rgba(140, 160, 255, .14);--text: #e8ecf8;--text-dim: #93a0c2;--accent: #5b8cff;--accent2: #8b5bff;--ok: #21c07d;--warn: #e0a72f;--danger: #ff5d72;--shadow: 0 12px 36px rgba(0, 0, 0, .42);--ring-rgb: 91, 140, 255}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);background-image:var(--bg-grad);background-attachment:fixed;color:var(--text);transition:background-color .3s,color .3s}#app{min-height:100dvh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;padding:calc(env(safe-area-inset-top) + 14px) 20px 14px;max-width:520px;width:100%;margin:0 auto}.brand{font-weight:800;font-size:20px;letter-spacing:.5px;background:linear-gradient(120deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}.theme-btn{min-width:44px;min-height:44px;border-radius:14px;border:1px solid var(--card-border);background:var(--card);color:var(--text);font-size:18px;cursor:pointer;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}.app-main{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:8px 16px calc(env(safe-area-inset-bottom) + 28px)}.card{width:100%;max-width:480px;border-radius:22px;background:var(--card);border:1px solid var(--card-border);box-shadow:var(--shadow);padding:28px 22px;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}@media(min-width:720px){.app-main{align-items:center}.card{padding:36px 32px}}h1.title{font-size:22px;font-weight:700;margin-bottom:6px}p.sub{color:var(--text-dim);font-size:14px;line-height:1.6;margin-bottom:18px}.field{margin-bottom:14px}.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px}.input{width:100%;min-height:48px;padding:12px 14px;font-size:16px;border-radius:14px;border:1px solid var(--card-border);background:#7f93ff0f;color:var(--text);outline:none;transition:border-color .2s,box-shadow .2s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--ring-rgb),.18)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;width:100%;font-size:16px;font-weight:600;border-radius:14px;border:none;cursor:pointer;color:#fff;background:linear-gradient(120deg,var(--accent),var(--accent2));transition:transform .12s,opacity .2s}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--card-border)}.btn.ok{background:linear-gradient(120deg,var(--ok),#17a06b)}.btn.danger{background:linear-gradient(120deg,var(--danger),#b32b44)}.btn.small{width:auto;min-height:40px;padding:8px 16px;font-size:14px}.tabs{display:flex;gap:6px;background:#7f93ff14;border-radius:14px;padding:5px;margin-bottom:20px}.tabs button{flex:1;min-height:42px;border:none;border-radius:11px;cursor:pointer;font-size:15px;font-weight:600;color:var(--text-dim);background:transparent}.tabs button.active{background:var(--card);color:var(--text);box-shadow:var(--shadow)}.error{color:var(--danger);font-size:14px;margin:10px 0;min-height:1em}.notice{max-width:480px;margin:0 auto 12px;padding:10px 16px;border-radius:12px;background:#e0a72f24;color:var(--warn);border:1px solid rgba(224,167,47,.3);font-size:14px}.linkbox{display:flex;align-items:center;gap:10px;padding:14px;background:#7f93ff14;border:1px dashed var(--card-border);border-radius:14px;margin:14px 0;cursor:pointer}.linkbox .url{flex:1;font-size:14px;word-break:break-all;color:var(--accent);font-family:ui-monospace,Menlo,monospace}.qr-wrap{display:flex;justify-content:center;margin:16px 0}.qr-wrap canvas{border-radius:14px;background:#fff;padding:8px}.status-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--ok);margin-right:8px;vertical-align:1px;animation:pulse 1.8s ease-out infinite}@keyframes pulse{0%{box-shadow:0 0 #21c07d80}70%{box-shadow:0 0 0 9px #21c07d00}to{box-shadow:0 0 #21c07d00}}.ring-stage{display:flex;flex-direction:column;align-items:center;padding:24px 0 10px}.avatar{position:relative;width:96px;height:96px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:36px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));margin-bottom:48px}.avatar .ripple{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:50%;border:2px solid rgba(var(--ring-rgb),.55);animation:ripple 2.7s ease-out infinite}.avatar .ripple:nth-child(2){animation-delay:.9s}.avatar .ripple:nth-child(3){animation-delay:1.8s}@keyframes ripple{0%{transform:scale(1);opacity:1}to{transform:scale(2.1);opacity:0}}.breath{animation:breath 2.6s ease-in-out infinite}@keyframes breath{0%,to{opacity:.55}50%{opacity:1}}.call-actions{display:flex;gap:14px;margin-top:26px}.timer{font-size:34px;font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:1px}.quality{display:inline-flex;gap:4px;align-items:flex-end;height:14px;margin-left:10px}.quality i{width:4px;border-radius:2px;background:var(--card-border)}.quality i:nth-child(1){height:6px}.quality i:nth-child(2){height:10px}.quality i:nth-child(3){height:14px}.quality.good i{background:var(--ok)}.quality.fair i:nth-child(-n+2){background:var(--warn)}.quality.poor i:nth-child(1){background:var(--danger)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center;z-index:50;background:#0a0e1a8c;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);color:#fff;font-size:16px}.spinner{width:34px;height:34px;border-radius:50%;border:3px solid rgba(255,255,255,.25);border-top-color:#fff;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.center{text-align:center}.big-emoji{font-size:52px;margin-bottom:12px}.mt{margin-top:16px}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}