:root { --ink: #343434; --muted: #74746f; --line: #e5e1d9; --blue: #477a76; --blue-soft: #e8f0ed; --gold: #c69b62; }
* { box-sizing: border-box; }
body.site { margin: 0; color: var(--ink); background: #f5f3ef; font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif; line-height: 1.6; }
[hidden] { display: none !important; }
a { color: var(--blue); }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 62px; padding: 6px 28px; background: #343434; border-bottom: 1px solid #262626; }
.site-brand { display: flex; align-items: center; text-decoration: none; }
.site-brand img { display: block; width: 160px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 14px; }
.site-nav > a:not(.site-btn) { color: #d5d1c8; text-decoration: none; font-size: 14px; }
.site-btn { display: inline-block; padding: 8px 16px; border: 1px solid var(--gold); border-radius: 8px; background: var(--gold); color: #343434; font: inherit; font-size: 14px; font-weight: 600; text-decoration: none; cursor: pointer; }
.site-btn:disabled { opacity: .6; cursor: default; }
.site-btn-ghost { background: transparent; color: #e2c69e; }
.site-btn-lg { padding: 12px 24px; font-size: 16px; }
.site-btn-block { display: block; width: 100%; margin-top: 16px; }
.hero { max-width: 820px; margin: 0 auto; padding: 80px 24px 56px; text-align: center; }
.hero h1 { margin: 0 0 16px; font-size: clamp(30px, 5vw, 46px); }
.hero p { margin: 0 auto 28px; max-width: 640px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.features { max-width: 1040px; margin: 0 auto; padding: 24px 24px 72px; }
.features h2 { text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 24px; }
.feature-grid article { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 8px 24px #3434340a; }
.feature-grid h3 { margin: 0 0 8px; font-size: 17px; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.site-footer { padding: 24px; background: #343434; color: #d5d1c8; text-align: center; font-size: 13px; }
.auth-card { max-width: 400px; margin: 56px auto; padding: 32px; background: #fff; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 10px 40px #24344a14; }
.auth-card h1 { margin: 0 0 8px; font-size: 24px; }
.auth-sub { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
.auth-card label { display: block; margin: 12px 0 6px; font-size: 13px; font-weight: 600; }
.auth-card input { width: 100%; padding: 10px 12px; border: 1px solid #d5dbe3; border-radius: 8px; font: inherit; }
.auth-card input:focus { outline: 2px solid var(--blue-soft); border-color: var(--blue); }
.auth-row { display: flex; justify-content: space-between; margin-top: 12px; }
.link-btn { padding: 0; border: 0; background: none; color: var(--blue); font: inherit; font-size: 13px; cursor: pointer; }
.link-btn:disabled { color: var(--muted); cursor: default; }
.auth-message { min-height: 1.5em; margin: 14px 0 0; font-size: 13px; color: var(--muted); }
.auth-message-error { color: #c0392b; }
.auth-alt { margin: 18px 0 0; text-align: center; font-size: 14px; color: var(--muted); }
@media (max-width: 560px) {
  .site-header { padding-right: 14px; padding-left: 14px; }
  .site-brand img { width: 132px; }
  .site-nav { gap: 8px; }
}