*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f4f7fb;--surface:#fff;--surface-alt:#f8fafc;--text:#172033;--muted:#64748b;--border:#dbe3ee;--primary:#2563eb;--primary-dark:#1d4ed8;--accent:#0f766e;--danger:#b91c1c;--shadow:0 12px 35px rgba(32,52,85,.08)}
[data-theme="dark"]{--bg:#0d1422;--surface:#172033;--surface-alt:#111827;--text:#e5edf8;--muted:#9cabc0;--border:#334155;--primary:#60a5fa;--primary-dark:#93c5fd;--accent:#5eead4;--danger:#fca5a5;--shadow:0 16px 40px rgba(0,0,0,.28)}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans TC",sans-serif;line-height:1.65}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
button,input,select,textarea{font:inherit}
header{background:linear-gradient(125deg,#0f172a,#1d4ed8 62%,#0f766e);color:#fff}
.header-inner{max-width:1040px;height:64px;margin:auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between}
.brand{color:#fff;font-weight:800;font-size:19px;display:inline-flex;align-items:center;gap:9px}.brand:hover{text-decoration:none}
.header-actions{display:flex;gap:10px;align-items:center}.header-actions a,.theme-toggle{border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.12);color:#fff;border-radius:9px;padding:6px 11px;font-weight:700;cursor:pointer}.theme-toggle{width:38px;height:38px;padding:0}
.icon{display:inline-block;width:1em;height:1em;flex:0 0 auto;background:currentColor;mask-position:center;mask-repeat:no-repeat;mask-size:contain;-webkit-mask-position:center;-webkit-mask-repeat:no-repeat;-webkit-mask-size:contain}.icon-clock{mask-image:url("assets/icons/clock.svg");-webkit-mask-image:url("assets/icons/clock.svg");font-size:20px}.icon-lock{mask-image:url("assets/icons/lock.svg");-webkit-mask-image:url("assets/icons/lock.svg");font-size:15px}.icon-moon{mask-image:url("assets/icons/moon.svg");-webkit-mask-image:url("assets/icons/moon.svg");font-size:18px}.icon-sun{mask-image:url("assets/icons/sun.svg");-webkit-mask-image:url("assets/icons/sun.svg");font-size:18px}
.theme-toggle{display:grid;place-items:center}
.container{max-width:1040px;margin:auto;padding:26px 20px 48px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:7px;font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumb a{color:var(--muted)}
.hero{text-align:center;max-width:760px;margin:18px auto 28px}.eyebrow{color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.hero h1{font-size:clamp(30px,6vw,48px);line-height:1.15;margin:8px 0 12px}.hero p{color:var(--muted);font-size:17px}
.privacy-note{display:inline-flex;align-items:center;gap:7px;margin-top:14px;padding:6px 12px;border-radius:999px;background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);font-size:13px;font-weight:700}
.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.card.full{grid-column:1/-1}.card h2{font-size:20px;margin-bottom:5px}.card-intro{color:var(--muted);font-size:14px;margin-bottom:18px}
label{display:block;font-size:13px;font-weight:750;margin-bottom:6px}.field{margin-bottom:15px}.input,.select,.textarea{width:100%;border:1.5px solid var(--border);background:var(--surface-alt);color:var(--text);border-radius:10px;padding:11px 13px}.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 14%,transparent)}.textarea{min-height:180px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.55}.textarea.output{background:var(--surface-alt)}
.settings{display:grid;grid-template-columns:1fr 1fr;gap:12px}.button-row{display:flex;flex-wrap:wrap;gap:9px}.btn{border:0;border-radius:10px;padding:10px 16px;font-weight:750;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--surface-alt);color:var(--text);border:1px solid var(--border)}
.examples{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin-top:14px;color:var(--muted);font-size:12px}.chip{border:1px solid var(--border);background:var(--surface-alt);color:var(--text);padding:5px 9px;border-radius:999px;cursor:pointer;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.status{min-height:24px;margin-top:12px;font-size:13px}.status.success{color:var(--accent)}.status.warning{color:#b45309}.status.error{color:var(--danger)}
.result-panel{margin-top:14px;border:1px solid var(--border);border-radius:12px;overflow:hidden}.result-row{display:grid;grid-template-columns:160px 1fr auto;gap:12px;align-items:center;padding:11px 12px;border-bottom:1px solid var(--border)}.result-row:last-child{border-bottom:0}.result-label{font-size:12px;color:var(--muted);font-weight:700}.result-row code{overflow-wrap:anywhere;font-size:13px}.copy-btn{border:1px solid var(--border);background:var(--surface-alt);color:var(--text);border-radius:7px;padding:4px 8px;cursor:pointer;font-size:12px}
.log-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.supported{margin-top:14px;color:var(--muted);font-size:12px}
.content{max-width:850px;margin:44px auto 0}.content h2{text-align:center;font-size:25px;margin-bottom:18px}.steps,.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.step,.feature{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}.step strong,.feature strong{display:block;margin-bottom:6px}.step span,.feature p{color:var(--muted);font-size:14px}
.faq{margin-top:42px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:10px;overflow:hidden}.faq-question{width:100%;border:0;background:transparent;color:var(--text);padding:15px 18px;text-align:left;font-weight:750;display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer}.faq-question::after{content:"";width:16px;height:16px;flex:0 0 auto;background:currentColor;mask:url("assets/icons/plus.svg") center/contain no-repeat;-webkit-mask:url("assets/icons/plus.svg") center/contain no-repeat}.faq-question[aria-expanded="true"]::after{mask-image:url("assets/icons/minus.svg");-webkit-mask-image:url("assets/icons/minus.svg")}.faq-answer{padding:0 18px 16px;color:var(--muted);font-size:14px}
footer{border-top:1px solid var(--border);padding:25px 20px;text-align:center;color:var(--muted);font-size:13px}footer nav{margin-bottom:5px}footer nav a{margin:0 7px;color:var(--muted)}
@media(max-width:760px){.container{padding:20px 14px 38px}.tool-grid,.log-grid,.settings,.steps,.feature-grid{grid-template-columns:1fr}.card.full{grid-column:auto}.card{padding:18px}.result-row{grid-template-columns:1fr auto}.result-row code{grid-column:1/-1;grid-row:2}.hero p{font-size:15px}.header-inner{padding:0 14px}.brand{font-size:16px}}