:root {
  color-scheme: light;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #17212b;
  background: #f5f7fa;
  --ink: #17212b;
  --muted: #66727f;
  --line: #dfe5eb;
  --panel: #ffffff;
  --blue: #1769aa;
  --blue-dark: #0e4f83;
  --teal: #13795b;
  --gold: #a66a12;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: #f5f7fa; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); text-decoration: underline; }
button, input { font: inherit; }
button, a.primary { cursor: pointer; }
:focus-visible { outline: 3px solid #e5a93d; outline-offset: 3px; }
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  max-width: 1180px; margin: 0 auto; padding: 22px 32px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 21px; font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand img { object-fit: contain; }
.site-header nav { display: flex; align-items: center; gap: 22px; font-size: 14px; font-weight: 600; }
main { min-height: calc(100svh - 140px); }
.site-footer { max-width: 1180px; margin: 0 auto; padding: 28px 32px 34px; color: var(--muted); font-size: 12px; }
.site-hero { max-width: 1180px; margin: 0 auto; padding: 72px 32px 36px; }
.hero-kicker { margin: 0 0 18px; color: var(--teal); font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.site-hero h1 { max-width: 720px; margin: 0; color: var(--ink); font-size: clamp(42px, 7vw, 78px); line-height: 1; letter-spacing: 0; }
.site-hero .subtitle { max-width: 620px; margin: 22px 0 30px; color: var(--muted); font-size: 19px; line-height: 1.65; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 0; color: var(--muted); font-size: 13px; }
.hero-meta span::before { content: "•"; margin-right: 8px; color: var(--gold); }
.download-page { max-width: 1180px; margin: 0 auto; padding: 0 32px 58px; }
.download-page > .product-icon, .download-page > h1, .download-page > .subtitle { display: none; }
.download-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin: 30px 0 16px; }
.download-heading h2 { margin: 0; font-size: 22px; }
.download-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.download-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.download-row {
  display: flex; align-items: center; justify-content: space-between; gap: 22px;
  min-width: 0; padding: 22px 24px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); box-shadow: 0 8px 24px #17212b0a;
}
.download-row h3 { margin: 0 0 7px; font-size: 17px; }
.download-row p { margin: 0; color: var(--muted); font-size: 13px; }
.download-row .primary { flex: 0 0 auto; }
.empty-state { grid-column: 1 / -1; margin: 0; padding: 30px 0; color: var(--muted); }
.primary {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
  padding: 10px 18px; border: 0; border-radius: 6px; background: var(--blue);
  color: #fff; font-size: 14px; font-weight: 700; text-align: center;
}
.primary:hover { background: var(--blue-dark); color: #fff; text-decoration: none; }
.secondary { padding: 9px 14px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); }
.auth-panel { width: min(100% - 48px, 440px); margin: 58px auto 0; padding: 34px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: 0 14px 36px #17212b0d; }
h1 { margin: 0 0 12px; font-size: 32px; line-height: 1.2; letter-spacing: 0; overflow-wrap: anywhere; }
h2 { margin: 26px 0 14px; font-size: 18px; }
.subtitle { margin: 0 0 28px; color: var(--muted); line-height: 1.6; }
.mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; margin-bottom: 26px; border: 1px solid var(--line); border-radius: 6px; background: #f3f6f8; }
.mode-switch a { padding: 10px; border-radius: 4px; color: var(--muted); font-size: 14px; text-align: center; }
.mode-switch a[aria-current] { background: #fff; color: var(--ink); box-shadow: 0 1px 5px #17212b15; }
.auth-panel form { display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 13px; font-weight: 700; }
.field-input { position: relative; }
.field input { width: 100%; min-width: 0; height: 48px; padding: 0 14px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-size: 16px; }
.field input[type=password], .field input[data-revealed] { padding-right: 48px; }
.field input:focus { border-color: var(--blue); }
.password-toggle { position: absolute; inset: 5px 5px auto auto; width: 38px; height: 38px; border: 0; border-radius: 4px; background: transparent; color: var(--muted); font-size: 19px; }
.password-toggle:hover { background: #f1f4f6; }
button:disabled { opacity: .6; cursor: wait; }
.checkbox { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; }
input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--blue); }
.help { color: var(--muted); font-size: 12px; line-height: 1.7; }
.help ul { margin: 0; padding-left: 18px; }
.errorlist { margin: 0; padding: 0; color: #b3261e; font-size: 13px; line-height: 1.6; list-style: none; overflow-wrap: anywhere; }
.auth-footnote { margin-top: 26px; }
.back-link { display: inline-block; margin-top: 24px; }
.workspace { width: min(100% - 48px, 760px); margin: 24px auto; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.eyebrow { color: var(--muted); font-size: 13px; }
.membership-status { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 20px 0 32px; padding: 22px 0; border-block: 1px solid var(--line); font-size: 14px; }
.membership-status strong { color: var(--teal); }
.feature-list { margin: 0 0 20px; padding: 0; list-style: none; }
.feature-list li { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.badge { color: var(--gold); font-size: 12px; }
.badge.allowed { color: var(--teal); }
.account-actions { display: flex; align-items: center; gap: 20px; margin-top: 28px; }
@media (max-width: 720px) {
  .site-header { padding: 20px 22px; }
  .site-header nav { gap: 14px; }
  .site-hero { padding: 52px 22px 28px; }
  .download-page { padding-inline: 22px; }
  .download-list { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .site-header { align-items: flex-start; }
  .site-header nav { flex-wrap: wrap; justify-content: flex-end; }
  .site-hero h1 { font-size: 48px; }
  .site-hero .subtitle { font-size: 16px; }
  .download-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .download-row { align-items: flex-start; flex-direction: column; }
  .download-row .primary { width: 100%; }
  .auth-panel { width: min(100% - 32px, 440px); margin-top: 28px; padding: 24px; }
  .workspace { width: min(100% - 32px, 760px); }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 0; }
}