/* Apple-inspired web styling. Native system typography and a restrained frosted header;
   this is a CSS approximation, not Apple's native Liquid Glass material.
   Radius: controls 999px, inputs 14px, panels 24px. Layers: header 20/50, sheet 40/60. */
:root,:root[data-theme="light"]{--bg:#faf9f6;--surface:#fffefa;--paper:#f3efe5;--ink:#272722;--muted:#6f6d65;--line:#dedbd3;--line-strong:#98958b;--grid-line:rgba(82,77,65,.055);--accent:#a64932;--accent-hover:#873b29;--on-accent:#fff;--accent-soft:#f2e2d9;--critical:#ad3027;--critical-soft:#fae7e2;--scrim:rgb(30 27 23 / .28);--sans:-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang HK","Noto Sans TC",sans-serif;--serif:"Songti TC","Noto Serif HK","Hiragino Mincho ProN",serif;color-scheme:light}
:root[data-theme="dark"]{--bg:#20211f;--surface:#292b27;--paper:#2b2d28;--ink:#eeeae1;--muted:#b4b2a8;--line:#45473f;--line-strong:#85877a;--grid-line:rgba(220,214,191,.05);--accent:#ecaa8a;--accent-hover:#f5c5ac;--on-accent:#29221e;--accent-soft:#44322b;--critical:#f4aaa1;--critical-soft:#4c2c28;--scrim:rgb(0 0 0 / .55);color-scheme:dark}
*{box-sizing:border-box}body{font-family:var(--sans);color-scheme:inherit;-webkit-font-smoothing:antialiased}h1,h2,h3,.big{letter-spacing:-.035em;text-wrap:balance}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}a,button{ -webkit-tap-highlight-color:transparent}button,.btn,.pill,.ghost{transition:background .2s,color .2s,border-color .2s,transform .2s}.btn:hover{text-decoration:none;color:var(--on-accent)}.btn.sec:hover{color:var(--ink)}button:active,.btn:active{transform:scale(.98)}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}input::placeholder{color:var(--muted)}input:focus,select:focus{border-color:var(--accent)}.btn:disabled,button:disabled{cursor:wait}.btn,.price{font-variant-numeric:tabular-nums}.btn{font-weight:500}.skip{position:fixed;top:-100px;left:16px;z-index:100;padding:12px 18px;background:var(--surface);color:var(--ink);border-radius:10px}.skip:focus{top:12px}
.nav,.hdr{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%)}
.nav{height:64px;max-width:none}.nav .brand{letter-spacing:.04em}.nav .links{gap:28px;font-size:13px}.nav .right{gap:20px}.nav .btn.sm{height:34px;font-size:13px;padding:0 18px}.nav .links a{color:var(--muted)}.nav .links a:hover{color:var(--ink);text-decoration:none}.nav .right .login{font-size:13px!important}
.theme-control{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:8px 12px;background:var(--surface);max-width:120px}
.screen main{max-width:600px;padding-top:56px;justify-content:flex-start;gap:26px}.screen h1{font-size:clamp(28px,3.4vw,40px);line-height:1.3}.step{gap:25px}.opt{border-radius:18px;min-height:70px;justify-content:space-between;font-size:17px}.opt::after{content:'›';font-size:24px;color:var(--muted)}.field{gap:8px}.input{border-color:var(--line)}.form-intro{margin-top:-8px;color:var(--muted);font-size:15px;line-height:1.7}.optional-fields{border-top:1px solid var(--line);padding-top:20px}.optional-fields summary{cursor:pointer;color:var(--muted);font-size:15px}.optional-fields .field{margin-top:20px}.form-recap{padding:16px 20px;background:var(--surface);border-radius:16px;color:var(--muted);font-size:14px;line-height:1.8}.form-recap strong{color:var(--ink);font-weight:500}.form-promise{font-size:14px;color:var(--muted);line-height:1.7}
.layout{max-width:1440px;gap:40px}.big{line-height:1.4}.para{font-size:18px;line-height:1.85}.card{border-radius:24px}.pillars div,.glance div,dl.meta{border:0}.pillars .me{box-shadow:inset 0 0 0 1px var(--accent)}.glance .v{font-size:18px}.st{min-width:0}.hdr .bar{border-radius:0}.rail button{min-height:44px;border-left:0;border-radius:10px}.rail button[aria-current="true"]{background:var(--accent-soft);color:var(--accent)}.evbox{padding:0 18px;background:var(--surface);border-radius:18px;border:0}.ev{min-height:44px}.msgs{scrollbar-width:thin}.msg.user span{border-radius:18px 18px 4px 18px}.syn{height:auto;min-height:72px}.chat .chip{white-space:normal;height:auto;min-height:36px;padding:8px 12px}
.hdr .bar{background:transparent;overflow:visible}
@media(min-width:1100px){#chatClose{display:none}}
@media(min-width:1100px){.layout{grid-template-columns:150px minmax(0,1fr) 310px}aside.chat{border:0;border-radius:24px;box-shadow:0 8px 32px rgb(30 40 60 / .035)}}
@media(min-width:1440px){.layout{grid-template-columns:170px minmax(0,1fr) 340px;gap:48px}}
@media(max-width:1099px){main.read{margin:0 auto}.layout{padding-top:36px}.para{font-size:17px}.nav .links{gap:18px}}
@media(max-width:767px){.nav .links,.nav .right .login{display:none}.burger{display:flex}.nav .right{gap:10px}.screen header{height:64px;padding:0 20px}.screen main{padding-top:32px;padding-bottom:64px}.pill{font-size:14px;padding:0 15px;min-height:44px}.screen header .ghost{font-size:13px}.card{padding:22px}.layout{padding-inline:20px;gap:24px}.big{font-size:25px}.theme-control{min-height:40px}}
@media(prefers-reduced-transparency:reduce){.nav,.hdr{background:var(--bg);backdrop-filter:none;-webkit-backdrop-filter:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,*::before,*::after{animation:none!important;transition:none!important}}

/* Common controls and editorial rhythm. */
body{margin:0;background:var(--bg);color:var(--ink)}[hidden]{display:none!important}.btn{background:var(--ink);color:var(--bg);font-family:var(--sans);font-weight:500;min-height:44px}.btn:hover{background:color-mix(in srgb,var(--ink) 85%,var(--bg));color:var(--bg)}.btn.sec{background:transparent;color:var(--ink);border-color:var(--line-strong)}.btn.sec:hover{background:var(--paper);color:var(--ink)}.nav .btn.sm{height:40px;min-height:40px}.input,input{border-color:var(--line-strong)}.rail button{border-radius:2px}.rail button[aria-current=true]{background:none;border-left:2px solid var(--accent)}.chat .chip{min-height:44px}.card{box-shadow:none}.screen .form-intro{line-height:1.9}.screen h1{font-family:var(--serif)}.screen .opt{border-radius:8px}.screen header{border-bottom:1px solid var(--line)}.theme-control{min-height:44px}h1,h2,h3{color:var(--ink)}summary{cursor:pointer}a{color:var(--accent)}