body.auth-page {
  background: #ffffff;
  color: var(--ink);
  min-height: 100vh;
  overflow: hidden;
}

.close {
  position: fixed;
  top: 24px;
  left: 28px;
  z-index: 3;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 8px 12px;
  border: 1px solid var(--ink);
  background: #ffffff;
  transition: background 0.15s, color 0.15s;
}
.close:hover { background: var(--ink); color: #ffffff; }

.auth-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
}

/* ===== 左侧品牌区（浅色）===== */
.brand-side {
  background:
    radial-gradient(700px 400px at 30% 20%, rgba(232, 93, 47, 0.12), transparent 60%),
    radial-gradient(500px 300px at 80% 90%, rgba(78, 182, 166, 0.09), transparent 60%),
    #f6f5f2;
  padding: 80px 60px 60px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--rule);
}
.brand-side::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(to right, rgba(20, 18, 16, 0.05) 0 1px, transparent 1px 40px);
  pointer-events: none;
}
.brand-line {
  font-family: var(--serif);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(80px, 12vw, 180px);
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  z-index: 1;
}
.brand-line .dot { color: var(--oxide); margin: -0.15em 0; }

.brand-plate {
  margin-top: 40px;
  z-index: 1;
  border: 1px solid var(--ink);
  padding: 20px 22px;
  max-width: 320px;
  background: #ffffff;
}
.plate-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.plate-row span:last-child { color: var(--oxide); }
.plate-row + .plate-row { border-top: 1px dashed var(--rule); }

.brand-quote {
  z-index: 1;
  font-family: var(--serif);
  font-style: italic;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);
  max-width: 320px;
  padding-left: 16px;
  border-left: 2px solid var(--oxide);
}
.brand-quote cite {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
}

/* ===== 右侧登录卡 ===== */
.auth-card {
  background: #ffffff;
  color: var(--ink);
  padding: 72px 64px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
  position: relative;
}
.auth-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--grain);
  pointer-events: none;
  opacity: 0.28;
  mix-blend-mode: multiply;
}

.auth-head { position: relative; }
.auth-head .meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
.auth-head h1 {
  font-family: var(--serif);
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 0.95;
}
.auth-head h1 em {
  font-style: italic;
  color: var(--oxide);
  font-weight: 300;
}
.auth-head .sub {
  margin-top: 12px;
  font-family: var(--body);
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 40ch;
  line-height: 1.55;
}

.tabs {
  display: inline-flex;
  gap: 2px;
  border: 1px solid var(--ink);
  padding: 4px;
  position: relative;
  background: #ffffff;
}
.tab {
  padding: 10px 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
  transition: background 0.15s, color 0.15s;
}
.tab.active {
  background: var(--ink);
  color: #ffffff;
}

#auth-form {
  display: grid;
  gap: 16px;
  max-width: 440px;
  position: relative;
}
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.field input {
  width: 100%;
  padding: 14px 16px;
  background: #ffffff;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.field input:focus {
  border-color: var(--oxide);
  background: #fff7f3;
}
.field input::placeholder {
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: 12px;
}
.field.hide { display: none; }

.code-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}
.code-row input { width: 100%; }
.code-btn {
  padding: 0 14px;
  height: 100%;
  min-height: 40px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.code-btn:hover:not(:disabled) {
  background: var(--oxide);
  color: var(--ink);
}
.code-btn:disabled {
  background: transparent;
  color: var(--ink-mute);
  border-style: dashed;
  cursor: not-allowed;
}

.submit {
  margin-top: 8px;
  padding: 16px 22px;
  background: var(--oxide);
  color: var(--ink);
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.15s, background 0.15s, box-shadow 0.15s;
}
.submit:hover {
  transform: translate(-2px, -2px);
  background: var(--sulfur);
  box-shadow: 4px 4px 0 var(--ink);
}
.submit .arrow {
  font-family: var(--serif);
  font-size: 24px;
  font-style: italic;
}

.msg {
  min-height: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--oxide-deep);
}
.msg.ok { color: var(--patina); }

.auth-foot {
  position: relative;
  display: flex;
  gap: 20px;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.auth-foot a {
  color: var(--ink-soft);
  transition: color 0.15s;
}
.auth-foot a:hover { color: var(--oxide); }
.auth-foot .dashed {
  flex: 1;
  border-top: 1px dashed var(--rule);
}

@media (max-width: 820px) {
  .auth-layout { grid-template-columns: 1fr; }
  .brand-side { padding: 60px 32px 40px; border-right: none; border-bottom: 1px solid var(--rule); }
  .brand-line { font-size: clamp(64px, 18vw, 120px); }
  .auth-card { padding: 40px 28px; }
}

/* ===== 登录页 · 手机 ≤ 560px ===== */
@media (max-width: 560px) {
  .brand-side {
    padding: 36px 20px 28px;
  }
  .brand-side .kicker {
    font-size: 10px;
    letter-spacing: 0.22em;
  }
  .brand-line { font-size: clamp(52px, 20vw, 88px); line-height: 0.95; }
  .brand-line + .brand-line { margin-top: 4px; }
  .brand-desc {
    font-size: 14px;
    line-height: 1.7;
    margin-top: 20px;
  }
  .plate-meta {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 26px;
  }
  .plate-meta > div { padding: 10px 12px; }

  .auth-card {
    padding: 28px 18px 34px;
  }
  .auth-card h2 {
    font-size: 28px;
    line-height: 1.15;
  }
  .auth-card .form-hint { font-size: 13px; margin-bottom: 22px; }

  /* 字段控件在手机上必须至少 44px 高（触控友好）+ 16px 字号（避免 iOS 自动缩放） */
  .field { margin-bottom: 14px; }
  .field label {
    font-size: 10px;
    letter-spacing: 0.16em;
    margin-bottom: 6px;
  }
  .field input,
  .field textarea {
    font-size: 16px !important;
    padding: 12px 14px !important;
    min-height: 44px;
    box-sizing: border-box;
  }

  /* 邮箱行：验证码按钮换到下方一整行 */
  .field-inline {
    flex-direction: column;
    gap: 8px;
    align-items: stretch;
  }
  .field-inline input { width: 100%; }
  .field-inline .send-code-btn,
  .field-inline button {
    width: 100%;
    padding: 12px 14px;
    font-size: 11px;
  }

  .btn-fill.big,
  .auth-card button[type="submit"] {
    width: 100%;
    padding: 14px 18px;
    font-size: 11px;
    letter-spacing: 0.22em;
  }

  .switch-line {
    font-size: 12px;
    line-height: 1.8;
    margin-top: 18px;
  }
  .switch-line a { display: inline-block; margin-top: 4px; }

  .form-msg {
    font-size: 12px;
    padding: 10px 12px;
    line-height: 1.6;
  }
}

/* 极小屏 */
@media (max-width: 360px) {
  .brand-side { padding: 28px 14px 22px; }
  .auth-card { padding: 22px 14px 28px; }
}