:root { font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", sans-serif; color: #17324d; background: #f5f8fb; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; line-height: 1.7; }
.site-header { width: min(100% - 2rem, 760px); margin: 1rem auto 0; padding: .75rem 0; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.site-header a { color: #155e75; }
.page-shell { width: min(100% - 2rem, 760px); margin: 2rem auto; padding: 2rem; border: 1px solid #cbd8e4; border-radius: 20px; background: #fff; }
.eyebrow { color: #176b87; font-weight: 800; letter-spacing: .05em; }
.page-description { color: #52657d; }
.result-card { margin-top: 1rem; padding: 1rem; border: 1px solid #d8e0ea; border-radius: 14px; background: #fbfdff; }
.field { display: grid; gap: .35rem; margin-top: 1rem; }
input, textarea, button { font: inherit; }
input, textarea { width: 100%; padding: .65rem; border: 1px solid #9fb2c5; border-radius: .5rem; }
textarea { min-height: 6rem; resize: vertical; }
button, .button-link { display: inline-block; margin: 1rem .5rem 0 0; padding: .65rem .9rem; border: 0; border-radius: 9px; background: #176b87; color: #fff; text-decoration: none; cursor: pointer; }
button.secondary { background: #64748b; }
button:disabled { cursor: wait; opacity: .55; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #f1ab2c; outline-offset: 3px; }
.status { min-height: 2rem; font-weight: 700; }
.status[data-state="success"] { color: #17643d; }
.status[data-state="error"] { color: #b42318; }
@media (max-width: 560px) { .site-header { align-items: flex-start; flex-direction: column; } .page-shell { margin: 1rem auto; padding: 1rem; } h1 { font-size: 1.6rem; } }