: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, 72rem); 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, 72rem); margin: 2rem auto; padding: 1.5rem; border: 1px solid #cbd8e4; border-radius: 20px; background: #fff; }
.eyebrow { color: #176b87; font-weight: 800; } .page-description { color: #52657d; }
.service-grid, .contact-layout { display: grid; gap: 1rem; }
/* TODO-1：把這兩個區塊改成手機優先的單欄。 */
.service-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.contact-layout { grid-template-columns: 1fr 1fr; }
/* TODO-2：在 760px 以上加入寬版欄位規則。 */
.service-card, .panel, .result-card { padding: 1rem; border: 1px solid #d8e0ea; border-radius: 14px; background: #fbfdff; }
.service-card h3, .panel h2, .result-card h2 { margin-top: 0; }
label { display: block; margin-top: .8rem; font-weight: 700; } input, textarea { width: 100%; padding: .65rem; border: 1px solid #aebdca; border-radius: 8px; font: inherit; }
button, a { font: inherit; } button { margin-top: 1rem; padding: .65rem .9rem; border: 0; border-radius: 9px; background: #176b87; color: #fff; cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #f1ab2c; outline-offset: 3px; }
.result-card { margin-top: 2rem; }
@media (max-width: 560px) { .site-header { align-items: flex-start; flex-direction: column; } .page-shell { margin: 1rem auto; padding: 1rem; } }