:root {
  color-scheme: light;
  --ink: #17211b;
  --paper: #f4f1e8;
  --paper-deep: #e6e0d2;
  --green: #1f6f52;
  --red: #b9422f;
  --brass: #b58a3a;
  --muted: #667069;
  --line: #b9b7aa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  letter-spacing: 0;
}

button, input, output { font: inherit; letter-spacing: 0; }

button {
  min-height: 42px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  padding: 9px 16px;
  color: var(--paper);
  background: var(--ink);
  cursor: pointer;
}

button:hover { background: var(--green); border-color: var(--green); }
button:focus-visible, input:focus-visible { outline: 3px solid color-mix(in srgb, var(--brass) 60%, transparent); outline-offset: 2px; }
button:disabled { cursor: wait; opacity: .55; }

.workbench {
  width: min(1440px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px clamp(18px, 4vw, 64px) 48px;
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
}

.masthead h1 { margin: 4px 0 0; font-family: "STSong", "SimSun", serif; font-size: clamp(30px, 5vw, 58px); font-weight: 700; }
.eyebrow, .section-index { margin: 0; color: var(--green); font-family: Consolas, monospace; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.build-mark { color: var(--muted); font-family: Consolas, monospace; font-size: 12px; text-align: right; }

.login-view {
  display: grid;
  grid-template-columns: minmax(240px, 5fr) minmax(300px, 4fr);
  gap: clamp(40px, 10vw, 150px);
  align-items: start;
  padding: clamp(56px, 10vh, 110px) 0;
}

.login-copy { padding-left: clamp(0px, 6vw, 90px); }
.login-copy h2, .training-stage h2, .identity-rail h2, .sync-rail h2 { margin: 12px 0; font-family: "STSong", "SimSun", serif; font-size: clamp(25px, 3vw, 38px); }
.login-copy p:last-child, .stage-intro { max-width: 560px; color: var(--muted); line-height: 1.8; }

.login-form {
  display: grid;
  gap: 10px;
  padding: 28px 0 0;
  border-top: 6px solid var(--brass);
}

.login-form label { margin-top: 8px; font-size: 13px; font-weight: 700; }
.login-form input { width: 100%; min-height: 46px; border: 1px solid var(--line); border-radius: 3px; padding: 10px 12px; color: var(--ink); background: #fffef9; }
.login-form button { margin-top: 12px; }
.login-form .legal-consent {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  margin-top: 12px;
  color: var(--muted);
  font-weight: 400;
  line-height: 1.65;
}
.login-form .legal-consent input {
  width: 18px;
  min-height: 18px;
  margin-top: 3px;
  padding: 0;
  accent-color: var(--green);
}
.legal-link {
  min-height: auto;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--green);
  background: transparent;
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.legal-link:hover { color: var(--red); background: transparent; }
.legal-version { margin: -2px 0 0 30px; color: var(--muted); font-family: Consolas, monospace; font-size: 11px; }

.legal-dialog {
  width: min(760px, calc(100vw - 32px));
  max-height: calc(100vh - 40px);
  padding: 0;
  border: 2px solid var(--ink);
  border-radius: 2px;
  color: var(--ink);
  background: var(--paper);
}
.legal-dialog::backdrop { background: rgba(17, 17, 15, .68); }
.legal-dialog article { padding: clamp(22px, 4vw, 38px); }
.legal-dialog header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 40px;
  gap: 24px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
}
.legal-dialog h2 { margin: 8px 0 0; font-family: "STSong", "SimSun", serif; font-size: 28px; }
.dialog-close {
  width: 40px;
  min-height: 40px;
  padding: 0;
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
  font-size: 25px;
  line-height: 1;
}
.legal-copy { max-height: min(58vh, 560px); overflow-y: auto; padding: 20px 20px 4px 0; }
.legal-copy h3 { margin: 24px 0 6px; font-family: "STSong", "SimSun", serif; font-size: 18px; }
.legal-copy p { margin: 0 0 12px; color: var(--muted); line-height: 1.85; }
.legal-dialog footer { display: flex; justify-content: flex-end; padding-top: 20px; border-top: 1px solid var(--line); }
.legal-dialog footer button { min-width: 120px; }

.console {
  display: grid;
  grid-template-columns: minmax(190px, 3fr) minmax(390px, 6fr) minmax(230px, 3fr);
  min-height: 620px;
  border-bottom: 1px solid var(--line);
}

.identity-rail, .training-stage, .sync-rail { padding: 34px clamp(18px, 3vw, 40px); }
.identity-rail { padding-left: 0; border-right: 1px solid var(--line); }
.training-stage { border-right: 1px solid var(--line); }
.sync-rail { padding-right: 0; }
.identity-rail h2, .sync-rail h2 { font-size: 24px; overflow-wrap: anywhere; }

.metrics, .sync-facts { margin: 30px 0; }
.metrics div, .sync-facts div { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-top: 1px solid var(--line); }
.metrics dt, .sync-facts dt { color: var(--muted); font-size: 12px; }
.metrics dd, .sync-facts dd { margin: 0; font-family: Consolas, monospace; font-weight: 700; text-align: right; }

.training-stage form { margin-top: 30px; }
.check-row { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 14px; align-items: start; padding: 20px 0; border-top: 1px solid var(--line); cursor: pointer; }
.check-row input { width: 20px; height: 20px; accent-color: var(--green); }
.check-row span { color: var(--muted); line-height: 1.65; }
.check-row b { display: block; margin-bottom: 3px; color: var(--ink); font-family: "STSong", "SimSun", serif; font-size: 18px; }
.training-stage form > button { width: 100%; margin-top: 18px; background: var(--green); border-color: var(--green); }
.training-stage form > button:hover { background: var(--ink); border-color: var(--ink); }

.quiet-button { width: 100%; margin-top: 8px; color: var(--ink); background: transparent; border-color: var(--line); }
.quiet-button:hover { color: var(--paper); }
.sync-actions { display: grid; gap: 5px; }
.privacy-note { margin-top: 28px; padding-top: 18px; border-top: 3px solid var(--red); color: var(--muted); font-size: 12px; line-height: 1.7; }
.conflict-action { border-color: var(--red); color: var(--red); }
.message { min-height: 22px; margin: 12px 0 0; color: var(--green); font-size: 13px; line-height: 1.6; }
.message[data-error="true"] { color: var(--red); }

.vault {
  grid-column: 1 / -1;
  padding: 36px 0 44px;
  border-top: 1px solid var(--line);
}

.vault-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 32px;
  align-items: end;
}

.vault h2 { margin: 12px 0 0; font-family: "STSong", "SimSun", serif; font-size: 30px; }
.vault-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 0; }
.vault-facts div { padding-top: 10px; border-top: 1px solid var(--line); }
.vault-facts dt { color: var(--muted); font-size: 12px; }
.vault-facts dd { margin: 7px 0 0; font-family: Consolas, monospace; font-weight: 700; overflow-wrap: anywhere; }

.vault-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 30px; border-bottom: 1px solid var(--line); }
.vault-tab { min-height: 38px; border-color: transparent; border-bottom: 3px solid transparent; color: var(--muted); background: transparent; }
.vault-tab:hover, .vault-tab[aria-selected="true"] { color: var(--ink); background: transparent; border-color: transparent; border-bottom-color: var(--green); }
.vault-tab:disabled { cursor: not-allowed; opacity: .35; }

.vault-panels { display: grid; grid-template-columns: minmax(320px, 620px) minmax(220px, 320px); gap: clamp(28px, 8vw, 120px); align-items: start; padding-top: 26px; }
.vault-panel { display: grid; grid-template-columns: minmax(130px, 180px) minmax(0, 1fr); gap: 12px 18px; align-items: center; }
.vault-panel label { color: var(--muted); font-size: 13px; font-weight: 700; }
.vault-panel input { width: 100%; min-height: 44px; border: 1px solid var(--line); border-radius: 3px; padding: 9px 11px; color: var(--ink); background: #fffef9; }
.vault-panel button[type="submit"] { grid-column: 2; margin-top: 6px; background: var(--green); border-color: var(--green); }
.vault-actions { display: grid; gap: 6px; }
.recovery-code { margin-top: 28px; padding: 18px 0; border-top: 3px solid var(--brass); border-bottom: 1px solid var(--line); }
.recovery-code span { display: block; color: var(--muted); font-size: 12px; font-weight: 700; }
.recovery-code output { display: block; margin: 10px 0 14px; font-family: Consolas, monospace; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; user-select: all; }
.recovery-code .quiet-button { width: auto; min-width: 160px; }

.private-product {
  grid-column: 1 / -1;
  padding: 36px 0 0;
  border-top: 2px solid var(--ink);
}

.private-product-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
  gap: 32px;
  align-items: end;
  padding-bottom: 24px;
}

.private-product h2 {
  margin: 12px 0 0;
  font-family: "STSong", "SimSun", serif;
  font-size: 30px;
}

.private-pack-actions { align-self: end; }
.private-product-frame {
  display: block;
  width: 100%;
  min-height: 720px;
  border: 0;
  background: #fff;
}

.site-footer {
  padding: 0 16px 28px;
  text-align: center;
  font-size: 12px;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
}

[hidden] { display: none !important; }

@media (max-width: 920px) {
  .console { grid-template-columns: minmax(170px, 2fr) minmax(360px, 5fr); }
  .sync-rail { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; padding: 28px 0; border-top: 1px solid var(--line); }
  .sync-rail .section-index, .sync-rail h2, .sync-rail > p, .sync-rail > dl { grid-column: 1; }
  .sync-actions, .privacy-note { grid-column: 2; }
  .privacy-note { grid-row: 3 / 6; }
  .vault { grid-column: 1 / -1; }
  .vault-panels { grid-template-columns: minmax(0, 1fr) 260px; gap: 30px; }
}

@media (max-width: 680px) {
  .workbench { padding: 18px 16px 36px; }
  .masthead { grid-template-columns: 1fr; }
  .build-mark { text-align: left; }
  .login-view, .console { display: block; }
  .login-copy { padding-left: 0; }
  .identity-rail, .training-stage, .sync-rail { display: block; padding: 28px 0; border: 0; border-bottom: 1px solid var(--line); }
  .masthead h1 { font-size: 34px; }
  .vault { padding: 30px 0; }
  .vault-heading, .vault-panels { display: block; }
  .vault-facts { margin-top: 24px; }
  .vault-actions { margin-top: 24px; }
  .vault-panel { grid-template-columns: 1fr; }
  .vault-panel button[type="submit"] { grid-column: 1; }
  .private-product-heading { display: block; }
  .private-pack-actions { margin-top: 18px; }
  .legal-dialog article { padding: 20px 16px; }
  .legal-dialog h2 { font-size: 24px; }
  .legal-copy { max-height: 62vh; padding-right: 8px; }
}