/* Shared Auth Shell · 11老师中文教师平台 Design System（2026-09-14 重做）
   白色/浅背景 · 品牌深蓝 #192165 · 亮蓝 #2660e5 · 青绿 #18bfa0 · 与主站按钮/圆角/阴影/字体一致。桌面左介绍右表单，≤860px 单栏。 */
body.auth-page { background: #f5f8ff; color: #24364f; }
body.auth-page .flash-stack { top: 18px; }
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); background: radial-gradient(circle at 12% 18%, rgba(38, 96, 229, 0.10), transparent 32%), radial-gradient(circle at 88% 90%, rgba(24, 191, 160, 0.12), transparent 30%), linear-gradient(135deg, #ffffff 0%, #f5f8ff 55%, #eef3ff 100%); }
.auth-shell-single { grid-template-columns: minmax(0, 1fr); place-items: center; padding: 48px 20px; }
.auth-intro { display: grid; align-items: center; padding: clamp(40px, 8vw, 110px) clamp(24px, 6vw, 88px); }
.auth-intro-inner { max-width: 520px; }
.auth-intro-brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: #192165; font-weight: 800; font-size: 16px; }
.auth-intro-brand img { width: 56px; height: 40px; object-fit: contain; }
.auth-intro-title { margin: 34px 0 26px; font-size: clamp(32px, 3.6vw, 50px); line-height: 1.22; font-weight: 800; letter-spacing: -0.01em; color: #192165; background: linear-gradient(135deg, #192165 0%, #2660e5 60%, #18bfa0 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.auth-intro-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.auth-intro-tags span { padding: 8px 14px; border-radius: 999px; border: 1px solid #cfe0ff; background: rgba(255, 255, 255, 0.8); color: #192165; font-size: 13px; font-weight: 600; }
.auth-intro-note { margin: 26px 0 0; color: #6f7d91; font-size: 14px; }
.auth-card { align-self: center; justify-self: center; width: min(460px, calc(100% - 40px)); margin: 40px 0; padding: 36px 36px 32px; background: #fff; border: 1px solid #e2e7ef; border-radius: 24px; box-shadow: 0 24px 60px rgba(25, 33, 101, 0.10); }
.auth-status-card { max-width: 480px; }
.auth-brand-identity { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.auth-brand-identity img { width: 54px; height: 38px; object-fit: contain; }
.auth-brand-identity strong { color: #192165; font-size: 15px; font-weight: 800; }
.auth-card h2 { margin: 0 0 8px; font-size: 28px; line-height: 1.25; color: #192165; letter-spacing: -0.01em; }
.auth-card .auth-lead { margin: 0 0 22px; color: #6f7d91; font-size: 14px; line-height: 1.7; }
.auth-card .stack-form { display: grid; gap: 16px; }
.auth-card label { display: grid; gap: 7px; font-size: 13px; font-weight: 700; color: #192165; }
.auth-card label small { font-weight: 400; color: #6f7d91; }
.auth-card input:not([type="checkbox"]) { min-height: 48px; padding: 0 14px; border: 1px solid #dfe6f2; border-radius: 14px; background: #fff; font: inherit; font-size: 15px; color: #24364f; transition: border-color .15s, box-shadow .15s; }
.auth-card input:not([type="checkbox"]):focus { outline: none; border-color: #2660e5; box-shadow: 0 0 0 4px rgba(38, 96, 229, 0.14); }
.auth-card .password-field { position: relative; display: block; }
.auth-card .password-field input { width: 100%; padding-right: 92px; box-sizing: border-box; }
.auth-card .password-toggle { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); min-height: 32px; padding: 0 10px; border: 0; border-radius: 10px; background: #eef3ff; color: #2660e5; font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; }
.auth-card .check-row { display: flex; align-items: center; gap: 10px; font-weight: 500; color: #24364f; }
.auth-card .check-row input { width: 16px; height: 16px; accent-color: #2660e5; }
.auth-card .primary-button, .auth-card .secondary-button { min-height: 48px; border-radius: 15px; font-size: 15px; font-weight: 700; width: 100%; }
.auth-card .primary-button { color: #fff; border: 1px solid rgba(255, 255, 255, 0.22); background: linear-gradient(135deg, #2958df 0%, #2b72ee 45%, #18bfa0 100%); box-shadow: 0 14px 30px rgba(38, 96, 229, 0.18); }
.auth-card .primary-button:hover { filter: brightness(1.04); background: linear-gradient(135deg, #2958df 0%, #2b72ee 45%, #18bfa0 100%); box-shadow: 0 16px 34px rgba(38, 96, 229, 0.24); }
.auth-card .secondary-button { color: #192165; background: #fff; border: 1px solid #dfe6f2; box-shadow: none; }
.auth-card .secondary-button:hover { border-color: #cfe0ff; color: #2660e5; }
.auth-secondary-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 18px; margin-top: 20px; font-size: 14px; color: #6f7d91; }
.auth-secondary-actions a { color: #2660e5; font-weight: 700; text-decoration: none; }
.auth-secondary-actions a:hover { text-decoration: underline; }
.auth-help-text { color: #6f7d91; font-size: 13px; }
.auth-status-icon { width: 56px; height: 56px; display: grid; place-items: center; border-radius: 16px; background: #eef3ff; color: #2660e5; font-size: 26px; margin-bottom: 16px; }
.auth-honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
@media (max-width: 860px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-intro { padding: 36px 22px 8px; }
  .auth-intro-title { margin: 22px 0 18px; font-size: clamp(28px, 8vw, 36px); }
  .auth-card { width: min(460px, calc(100% - 32px)); margin: 18px 0 40px; padding: 26px 22px 24px; }
}

/* 2026-09-19 Google 登录按钮 */
.auth-card .auth-divider { display: flex; align-items: center; gap: 12px; margin: 16px 0 12px; color: #8a96a8; font-size: 13px; }
.auth-card .auth-divider::before, .auth-card .auth-divider::after { content: ""; flex: 1; height: 1px; background: #e6ebf3; }
.auth-card .google-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; text-decoration: none; }