:root{--bg: #eef2f6;--card: #ffffff;--text: #24312b;--muted: #66786e;--line: #dbe3ea;--accent: #06c167;--accent-dark: #02a85a;--danger: #ff4a3a;--shadow: 0 4px 14px rgba(32, 49, 40, .05);--radius-lg: 14px;--radius-md: 12px;--radius-sm: 8px;--container: 760px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,system-ui,sans-serif;background:var(--bg);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit;text-decoration:none}.container{width:min(calc(100% - 28px),var(--container));margin:0 auto}.site-banner{background:var(--accent)}.site-title{margin:0;padding:20px 0;color:#fff;font-size:clamp(1.25rem,2vw,1.7rem);font-weight:700;text-align:center}.section,.section-alt{padding:18px 0 0}.tool-stage,.tips-section{display:grid;gap:14px}.workspace-shell{width:min(100%,760px);margin:0 auto}.status-strip,.converter-card,.article-card,.tip-card{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--card);box-shadow:var(--shadow)}.status-strip{display:grid;grid-template-columns:1fr 160px 150px;align-items:center;gap:14px;min-height:54px;padding:14px 18px}.status-strip>div{min-width:0}.status-label{display:inline-block;margin-right:8px;color:var(--text);font-size:13.2px;font-weight:400;line-height:1;vertical-align:middle}.status-strip strong{font-size:.96rem;font-weight:500;letter-spacing:.01em;line-height:1}.status-strip>div:first-child strong{color:#00b96b}.status-stop{color:var(--danger)}.status-control{display:inline-flex;align-items:center;gap:8px;vertical-align:middle;min-width:88px;padding:0;border:0;background:transparent;cursor:pointer}.status-control strong{font-size:13.2px;line-height:1}.status-control-icon{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:16px;height:16px}.status-control-stop .status-control-icon{border-radius:3px;background:var(--danger)}.status-control-start,.status-control-start strong,.status-start{color:var(--accent-dark)}.status-control-start .status-control-icon{position:relative}.status-control-start .status-control-icon:before{content:"";display:block;width:0;height:0;border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:12px solid var(--accent)}.status-indicator{display:inline-flex;align-items:center;gap:8px;color:var(--accent-dark);font-weight:500;white-space:nowrap;font-size:13.2px;line-height:1;min-width:110px;justify-self:end}.status-indicator-paused{color:var(--muted)}.status-indicator-paused .pulse-dot{animation:none;background:#aab6c2}.status-indicator-paused .pulse-dot:after{animation:none;border-color:#aab6c233;opacity:0}.pulse-dot{position:relative;display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--accent);animation:pulse-dot-core 1.6s ease-in-out infinite}.pulse-dot:after{content:"";position:absolute;inset:-6px;border-radius:50%;border:2px solid rgba(6,193,103,.28);animation:pulse-dot-ring 1.6s ease-out infinite}@keyframes pulse-dot-core{0%,to{transform:scale(.92);box-shadow:0 0 #06c1672e}50%{transform:scale(1);box-shadow:0 0 0 4px #06c1671a}}@keyframes pulse-dot-ring{0%{transform:scale(.72);opacity:.7}70%{transform:scale(1.2);opacity:0}to{transform:scale(1.2);opacity:0}}.converter-card{padding:10px 12px 12px}.section-label,.card-label{margin:0 0 8px;color:var(--accent-dark);font-size:13.2px;font-weight:700}.converter-grid{display:grid;grid-template-columns:68px 1.18fr .62fr .5fr .96fr 108px;gap:7px 8px;align-items:end}.field-group{display:grid;gap:4px;min-width:0}.field-group label{color:var(--text);font-size:13.2px}.field-label-inline{display:flex;align-items:center;min-height:32px;color:var(--text);font-size:13.2px;font-weight:400;justify-content:flex-end;white-space:nowrap}.field-group input,.field-group select{width:100%;min-height:32px;padding:0 9px;border:1px solid #ccd6df;border-radius:var(--radius-sm);background:#fff;color:var(--text);font:inherit;outline:none;font-size:13.2px;font-weight:400;line-height:1.2}.field-group input:focus,.field-group select:focus{border-color:#91c5a8}.action-slot{display:flex;align-items:end}.button{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:0 10px;border:1px solid transparent;border-radius:var(--radius-sm);font:inherit;font-weight:700;cursor:pointer;font-size:13.2px;letter-spacing:.01em}.button-primary{background:var(--accent);color:#fff}.button-block{width:100%}h2,h3,p{margin-top:0}.article-card{padding:16px 18px 14px}.article-card h2{margin-bottom:12px;font-size:1.35rem}.article-card h3{margin-top:20px;margin-bottom:10px;font-size:1.08rem}.article-text{margin-bottom:10px;color:var(--text);line-height:1.7;font-size:13.2px}.article-link{color:var(--accent-dark);text-decoration:underline;text-underline-offset:2px}.tips-heading{display:grid;justify-items:center;gap:8px}.tips-heading h2{margin-bottom:0;font-size:1.35rem}.tips-underline{width:42px;height:2px;border-radius:999px;background:var(--accent)}.tips-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tip-card{overflow:hidden;border-radius:var(--radius-md)}.tip-card-head{display:flex;align-items:center;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line)}.tip-card-head h3{margin:0;font-size:.98rem}.tip-icon{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:6px;font-size:.78rem;font-weight:700}.tip-icon-green{color:var(--accent-dark)}.tip-icon-red{color:var(--danger)}.tip-card-body{padding:12px}.tip-card-body p{margin-bottom:8px;color:var(--text);line-height:1.6;font-size:13.2px}.tip-card-body p:last-child{margin-bottom:0}.tip-code code{font-family:Consolas,SFMono-Regular,monospace;font-size:.82rem}input,select,button{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,system-ui,sans-serif}#timestamp-input,#timestamp-result,#datetime-input,#datetime-result,#offset-input,#offset-result{font-variant-numeric:tabular-nums;letter-spacing:.01em}.site-footer{padding:28px 0 0}.site-footer-band{background:var(--accent)}.footer-band-shell{display:grid;justify-items:center;gap:22px;padding:44px 16px 28px;text-align:center}.footer-brand,.footer-copy{margin:0;color:#fff}.footer-brand{font-size:1.05rem;font-weight:700}.footer-copy{font-size:.92rem}.footer-link{margin-left:6px;color:#fff;text-decoration:underline;text-underline-offset:2px}@media(max-width:900px){.status-strip{grid-template-columns:1fr}.status-indicator{justify-content:flex-start}.converter-grid{grid-template-columns:1fr}.field-label-inline{justify-content:flex-start;min-height:auto}.tips-grid{grid-template-columns:1fr}}