.auth-dialog {
  --account-viewport-height: 100dvh;
  position: fixed;
  inset: 0;
  width: min(460px, calc(100vw - 32px));
  max-width: none;
  max-height: min(760px, calc(100dvh - 32px));
  margin: auto;
  padding: 0;
  overflow: visible;
  color: var(--ink);
  background: transparent;
  border: 0;
}

.account-dialog { width: min(480px, calc(100vw - 24px)); max-height: calc(var(--account-viewport-height) - 24px); }
.account-dialog[data-view="billing"] { width: min(800px, calc(100vw - 24px)); }
.account-dialog .auth-dialog-frame { max-height: calc(var(--account-viewport-height) - 24px); overscroll-behavior: contain; scroll-padding: 24px; }
.account-dialog [hidden] { display: none !important; }
.account-dialog #accountDialogTitle { margin: 0 40px 10px 0; font-size: var(--fs-h2); font-weight: 600; }
.account-hint { margin: 0 0 20px; color: var(--muted); font-size: var(--fs-ui); line-height: 1.6; }
.account-dialog .field select { width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--border-strong); border-radius: var(--r-sm); color: var(--ink); background: var(--surface); font: inherit; }
.account-dialog .field input, .account-dialog .field select { font-size: max(16px, var(--fs-ui)); }
.account-dialog .field input[hidden] + * { margin: 0; }
.account-dialog details { margin: 14px 0 20px; }
.account-dialog summary { margin-bottom: 14px; color: var(--muted); cursor: pointer; font-size: var(--fs-ui); }
.account-secondary { min-height: 42px; padding: 8px 16px; border: 1px solid var(--border-strong); border-radius: var(--r-pill); background: var(--surface); color: var(--ink); font: inherit; font-size: var(--fs-ui); cursor: pointer; }
.account-actions { display: grid; gap: 10px; margin-top: 22px; }
.account-group-qr { display: block; width: min(240px, 100%); height: auto; margin: 20px auto; border-radius: var(--r-sm); }
.account-dialog .billing-main { padding: 12px 0 0; gap: 14px; min-width: 0; grid-template-columns: minmax(0, 1fr); }
.account-dialog .billing-card { padding: 18px; min-width: 0; }
.account-dialog .sku-card { color: var(--ink); }
.account-dialog .entitlement-list li { flex-wrap: wrap; }
.account-dialog .billing-card h2 { font-size: 18px; }
.account-dialog .orders-table { min-width: 560px; }
.account-dialog .billing-card:has(.orders-table) { overflow-x: auto; }
.account-compatibility { display: flex; gap: 16px; align-items: center; justify-content: center; min-height: 100dvh; padding: 24px; }
.account-compatibility button { padding: 10px 18px; border: 1px solid var(--border-strong); border-radius: var(--r-pill); color: var(--ink); background: var(--surface); font: inherit; cursor: pointer; }

.auth-dialog::backdrop {
  background: var(--scrim);
}

.auth-dialog-frame {
  position: relative;
  max-height: min(760px, calc(100dvh - 32px));
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--shadow-modal);
}

.auth-dialog-close {
  position: sticky;
  z-index: 1;
  top: 14px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin: 14px 14px -48px auto;
  padding: 0;
  border: 0;
  border-radius: var(--r-pill);
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: var(--fs-h2);
  line-height: 1;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}
.auth-dialog-close svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.auth-dialog-close:hover,
.auth-dialog-close:focus-visible { color: var(--ink); background: var(--surface-subtle); }

.auth-dialog-panel { padding: 34px 34px 30px; }
.auth-dialog #guestPanel[hidden],
.auth-dialog .session-panel[hidden],
.auth-dialog .register-only[hidden] { display: none; }
.auth-dialog .session-panel { padding: 30px 10px 12px; text-align: center; }
.auth-dialog .session-panel p { margin: 0 0 18px; font-size: var(--fs-ui); }
.auth-dialog #welcomePanel { padding: 38px 10px 18px; text-align: center; outline: 0; }
.auth-dialog #welcomePanel h2 { margin: 14px 0 8px; font-size: var(--fs-h2); font-weight: 600; }
.auth-dialog #welcomePanel p { margin: 0 auto 20px; color: var(--muted); font-size: var(--fs-ui); line-height: 1.6; }
.auth-dialog .auth-success-mark { display: grid; place-items: center; width: 50px; height: 50px; margin: 0 auto; border-radius: var(--r-pill); color: var(--on-accent); background: var(--success); font-size: var(--fs-h2); font-weight: 600; }
.auth-dialog .session-actions { display: flex; justify-content: center; gap: 10px; }
.auth-dialog .continue-link,
.auth-dialog .session-actions button { min-height: 40px; padding: 9px 20px; border-radius: var(--r-pill); font: inherit; font-size: var(--fs-ui); font-weight: 600; cursor: pointer; }
.auth-dialog .continue-link { color: var(--on-accent); background: var(--accent); border: 1px solid var(--accent); }
.auth-dialog .session-actions #logoutButton { color: var(--accent-strong); background: transparent; border: 1px solid var(--border-strong); }
.auth-dialog .mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin: 0 42px 28px 0; padding: 3px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--surface-subtle); }
.auth-dialog .mode-switch button { min-height: 38px; border: 0; border-radius: var(--r-pill); color: var(--muted); background: transparent; font: inherit; font-size: var(--fs-ui); cursor: pointer; }
.auth-dialog .mode-switch button[aria-selected="true"] { color: var(--ink); background: var(--surface); box-shadow: 0 0 0 1px var(--border); font-weight: 600; }
.auth-dialog .panel-heading h2 { margin: 0; font-size: var(--fs-h2); font-weight: 600; }
.auth-dialog .panel-heading p { margin: 7px 0 24px; color: var(--muted); font-size: var(--fs-ui); line-height: 1.6; }
.auth-dialog .field { margin-bottom: 17px; }
.auth-dialog .field label { display: block; margin-bottom: 7px; font-size: var(--fs-ui); font-weight: 600; }
.auth-dialog .field input { width: 100%; height: 44px; padding: 0 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--r-sm); outline: 0; }
.auth-dialog .field input:focus { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.auth-dialog .field.has-error input { border-color: var(--danger); }
.auth-dialog .password-control { position: relative; }
.auth-dialog .password-control input { padding-right: 64px; }
.auth-dialog .password-toggle { position: absolute; right: 5px; top: 5px; min-width: 48px; min-height: 34px; border: 0; border-radius: var(--r-sm); color: var(--accent-strong); background: transparent; cursor: pointer; }
.auth-dialog .password-toggle:hover { background: var(--accent-soft); }
.auth-dialog .hint,
.auth-dialog .error { min-height: 18px; margin: 5px 0 0; font-size: var(--fs-caption); line-height: 1.5; }
.auth-dialog .hint { color: var(--muted); }
.auth-dialog .error { color: var(--danger); }
.auth-dialog .form-message { margin: 4px 0 16px; padding: 12px 14px; color: var(--marker-ink); background: var(--marker-soft); border: 1px solid var(--marker); border-radius: var(--r-sm); font-size: var(--fs-ui); line-height: 1.55; }
.auth-dialog .submit-button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; width: 100%; min-height: 44px; border: 0; border-radius: var(--r-pill); color: var(--on-accent); background: var(--accent); font: inherit; font-size: var(--fs-ui); font-weight: 600; cursor: pointer; }
.auth-dialog .submit-button:hover:not(:disabled) { background: var(--accent-strong); }
.auth-dialog .submit-button:disabled { cursor: wait; opacity: .72; }
.auth-dialog .spinner { width: 17px; height: 17px; border: 2px solid color-mix(in srgb, var(--on-accent) 40%, transparent); border-top-color: var(--on-accent); border-radius: 50%; animation: auth-dialog-spin .75s linear infinite; }
.auth-dialog .boundary-note { display: flex; gap: 7px; margin: 17px 0 0; color: var(--faint); font-size: var(--fs-caption); line-height: 1.55; }
.auth-dialog .boundary-note span { color: var(--accent); font-weight: 600; }
.login-prompt-action { flex: none; padding: 0; border: 0; color: var(--accent-strong); background: transparent; font: inherit; font-weight: 600; cursor: pointer; }
.login-prompt-action:hover { text-decoration: underline; }

@keyframes auth-dialog-spin { to { transform: rotate(360deg); } }

@media (max-width: 520px) {
  .auth-dialog { width: calc(100vw - 20px); max-height: calc(100dvh - 20px); }
  .auth-dialog-frame { max-height: calc(100dvh - 20px); border-radius: var(--r-md); }
  .auth-dialog-panel { padding: 26px 20px 24px; }
  .auth-dialog .mode-switch { margin-right: 40px; }
}

/* ---------- t-20261026-5gbx login：登录与注册只留邮箱和密码；错误在出错那一格下面；成功时按钮变绿色对勾 ---------- */

/* 弹窗进场：轻轻浮上来，遮罩淡入；登录、注册、问卷都贴着上方开，换界面时上沿不跳 */
.auth-dialog[open] { animation: auth-dialog-in 220ms cubic-bezier(.2, .8, .2, 1); }
.auth-dialog[open]::backdrop { animation: auth-scrim-in 200ms linear; }
@keyframes auth-dialog-in { from { opacity: 0; transform: translateY(10px) scale(.985); } }
@keyframes auth-scrim-in { from { opacity: 0; } }
.account-dialog:not([data-view="billing"]) {
  /* 跟着可见高度走：手机键盘弹起时上沿也收上去，按钮不躲到键盘后面 */
  --auth-top: clamp(12px, calc(var(--account-viewport-height) * .12), 112px);
  margin-top: var(--auth-top);
  max-height: calc(var(--account-viewport-height) - var(--auth-top) - 12px);
}
.account-dialog:not([data-view="billing"]) .auth-dialog-frame { max-height: calc(var(--account-viewport-height) - var(--auth-top) - 12px); }
.account-dialog[data-view="login"], .account-dialog[data-view="register"] { width: min(420px, calc(100vw - 24px)); }
.account-dialog[data-view="login"] .auth-dialog-panel,
.account-dialog[data-view="register"] .auth-dialog-panel { padding: 22px 28px 26px; }

/* 标题只给读屏：上面的「登录 | 注册」已经说清楚这是哪一步 */
.auth-dialog .auth-title { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0; }
.auth-dialog .mode-switch { position: relative; isolation: isolate; margin: 0 44px 22px 0; }
.auth-dialog .mode-switch button { transition: color 160ms ease; }
/* 选中的一格是一块白色滑块（::before），换登录 / 注册时从另一边滑过来 */
.auth-dialog .mode-switch::before { content: ''; position: absolute; z-index: -1; top: 3px; bottom: 3px; left: 3px; width: calc(50% - 5px); border-radius: var(--r-pill); background: var(--surface); box-shadow: 0 0 0 1px var(--border); --tab-at: translateX(0); --tab-from: translateX(calc(100% + 4px)); transform: var(--tab-at); }
.account-dialog[data-view="register"] .mode-switch::before { --tab-at: translateX(calc(100% + 4px)); --tab-from: translateX(0); }
.auth-dialog .mode-switch button[aria-selected="true"] { background: transparent; box-shadow: none; }
.auth-dialog .mode-switch button:not([aria-selected="true"]):hover { color: var(--ink); }
.auth-dialog .mode-switch.is-switched::before { animation: auth-tab-slide 200ms cubic-bezier(.2, .8, .2, 1); }
@keyframes auth-tab-slide { from { transform: var(--tab-from); } to { transform: var(--tab-at); } }
.auth-dialog .auth-resume { margin: -8px 0 18px; }

.auth-dialog form.is-entering,
.auth-dialog .auth-stage.is-entering { animation: auth-stage-in 180ms cubic-bezier(.2, .8, .2, 1); }
@keyframes auth-stage-in { from { opacity: 0; transform: translateY(4px); } }

/* 输入格：标签、输入框、下面一行提示或错误 */
.auth-dialog .field { margin-bottom: 14px; }
.auth-dialog .field input { transition: border-color 150ms ease, box-shadow 150ms ease; }
.auth-dialog .field.has-error input { border-color: var(--danger); }
.auth-dialog .field.has-error input:focus { box-shadow: inset 0 0 0 1px var(--danger); }
.auth-dialog .field-note { display: flex; align-items: flex-start; gap: 6px; min-height: 0; margin: 6px 0 0; color: var(--muted); font-size: var(--fs-caption); line-height: 1.5; }
.auth-dialog .field-note:empty { display: none; }
.auth-dialog .field-note svg { flex: none; width: 14px; height: 14px; margin-top: 2px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .field.has-error .field-note { color: var(--danger); font-size: var(--fs-ui); line-height: 1.45; }
.auth-dialog .field.has-error .field-note svg { margin-top: 3px; }
.auth-dialog .field.is-shaking input { animation: auth-shake 260ms cubic-bezier(.36, .07, .19, .97); }
@keyframes auth-shake { 20% { transform: translateX(-4px); } 45% { transform: translateX(4px); } 70% { transform: translateX(-2px); } 90% { transform: translateX(1px); } }

/* 密码规则：灰点 → 满足后绿色对勾；没满足就提交变红 */
.auth-dialog .field-note .rule-dot { flex: none; width: 6px; height: 6px; margin: 6px 4px 0; border-radius: var(--r-pill); background: var(--border-strong); }
.auth-dialog .field-note[data-rule="ok"] { color: var(--success); }
.auth-dialog .field-note[data-rule="ok"] svg { stroke-width: 2.2; }
.auth-dialog .field-note[data-rule="ok"] svg path { stroke-dasharray: 16; animation: auth-draw 260ms ease-out; }
.auth-dialog .field.has-error .field-note[data-rule="bad"] { color: var(--danger); font-size: var(--fs-caption); line-height: 1.5; }
.auth-dialog .field.has-error .field-note[data-rule="bad"] svg { margin-top: 2px; }

/* 密码旁的眼睛 */
.auth-dialog .password-toggle { display: grid; place-items: center; top: 5px; right: 5px; width: 36px; min-width: 36px; height: 34px; min-height: 34px; padding: 0; color: var(--muted); transition: background-color 150ms ease, color 150ms ease; }
.auth-dialog .password-toggle:hover { color: var(--ink); background: var(--surface-subtle); }
.auth-dialog .password-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .password-toggle .icon-eye-off,
.auth-dialog .password-toggle.is-visible .icon-eye { display: none; }
.auth-dialog .password-toggle.is-visible .icon-eye-off { display: block; }
.auth-dialog .password-control input { padding-right: 48px; }

/* 大写锁定：密码格里、眼睛左边亮一枚提醒色小签 */
.auth-dialog .caps-hint { position: absolute; top: 50%; right: 46px; display: inline-flex; align-items: center; gap: 3px; height: 22px; padding: 0 7px 0 5px; border-radius: var(--r-pill); color: var(--marker-ink); background: var(--marker-soft); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--marker) 60%, transparent); font-size: var(--fs-caption); font-weight: 600; line-height: 1; transform: translateY(-50%); pointer-events: none; animation: auth-caps-in 160ms cubic-bezier(.2, .8, .2, 1); }
.auth-dialog .caps-hint svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .field.has-caps .password-control input { padding-right: 112px; }
@keyframes auth-caps-in { from { opacity: 0; transform: translateY(-50%) scale(.8); } }

/* 小签按钮：邀请码、重新发送 */
.auth-dialog .auth-chip { display: inline-flex; align-items: center; gap: 6px; min-height: 32px; padding: 0 12px 0 10px; border: 1px solid var(--border); border-radius: var(--r-pill); color: var(--muted); background: var(--surface); font: inherit; font-size: var(--fs-caption); font-weight: 600; cursor: pointer; transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease, transform 120ms ease; }
.auth-dialog .auth-chip:hover:not(:disabled) { color: var(--ink); border-color: var(--border-strong); background: var(--surface-subtle); }
.auth-dialog .auth-chip:active:not(:disabled) { transform: scale(.97); }
.auth-dialog .auth-chip:disabled { cursor: default; color: var(--faint); background: transparent; }
.auth-dialog .auth-chip svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .auth-chip { font-variant-numeric: tabular-nums; }
.auth-dialog .auth-chip-spinner { display: none; width: 12px; height: 12px; border: 2px solid var(--border-strong); border-top-color: var(--accent); border-radius: 50%; animation: auth-dialog-spin .75s linear infinite; }
.auth-dialog .auth-chip.is-busy svg { display: none; }
.auth-dialog .auth-chip.is-busy .auth-chip-spinner { display: inline-block; }
.auth-dialog .auth-invite { margin: 2px 0 6px; }
.auth-dialog .auth-invite .field { margin-bottom: 4px; }

/* 验证码这一步：发到哪个邮箱、改邮箱、6 位数字一格 */
.auth-dialog .auth-sent { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; margin: 0 0 16px; color: var(--muted); font-size: var(--fs-ui); line-height: 1.5; }
.auth-dialog .auth-sent strong { color: var(--ink); font-weight: 600; overflow-wrap: anywhere; }
.auth-dialog .auth-icon-button { display: inline-grid; place-items: center; width: 28px; height: 28px; padding: 0; border: 0; border-radius: var(--r-pill); color: var(--muted); background: transparent; cursor: pointer; transition: background-color 150ms ease, color 150ms ease; }
.auth-dialog .auth-icon-button:hover { color: var(--ink); background: var(--surface-subtle); }
.auth-dialog .auth-icon-button svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .field input.auth-code { height: 52px; padding: 0 16px; font-family: var(--font-mono); font-size: var(--fs-h2); font-variant-numeric: tabular-nums; letter-spacing: .5em; text-indent: .5em; text-align: center; }
.auth-dialog .field input.auth-code::placeholder { color: var(--faint); }
/* 「验证码已发到 …」已经说清这一格填什么：格子上方的标签只给读屏 */
.auth-dialog #emailCodeRow > label { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.auth-dialog #emailCodeField .auth-sent { margin-bottom: 12px; }
.auth-dialog #emailCodeField > .auth-chip { margin-bottom: 4px; }

/* 问卷交上后的加群页：刚领到 100 点时，那一行前面画出一枚绿色对勾 */
.account-dialog #groupReward.is-rewarded { display: flex; align-items: flex-start; gap: 8px; color: var(--success); font-weight: 600; }
.account-dialog #groupReward.is-rewarded svg { flex: none; width: 18px; height: 18px; margin-top: 2px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.account-dialog #groupReward.is-rewarded svg path { stroke-dasharray: 18; animation: auth-draw 360ms cubic-bezier(.2, .8, .2, 1) 120ms backwards; }

/* 人机验证：多半自己就过了，不占地方；需要学生点一下时才露出来 */
.auth-dialog #turnstileField { margin: 4px 0 12px; transition: opacity 160ms ease; }
.auth-dialog #turnstileField.is-quiet { height: 0; margin: 0; overflow: hidden; opacity: 0; }
.auth-dialog #turnstileField .error:empty { display: none; }

/* 不属于哪一格的话：按钮上方一行，错误红、提醒蓝 */
.auth-dialog .auth-message { display: none; align-items: flex-start; gap: 8px; margin: 2px 0 14px; padding: 10px 12px; border-radius: var(--r-sm); color: var(--danger); background: var(--danger-soft); font-size: var(--fs-ui); line-height: 1.5; }
.auth-dialog .auth-message.is-shown { display: flex; animation: auth-stage-in 180ms cubic-bezier(.2, .8, .2, 1); }
.auth-dialog .auth-message[data-tone="info"] { color: var(--accent-strong); background: var(--accent-soft); }
.auth-dialog .auth-message svg { flex: none; width: 16px; height: 16px; margin-top: 2px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }

/* 提交按钮：忙时转一个小圈，成了变绿色对勾 */
.auth-dialog .submit-button { position: relative; margin-top: 6px; transition: background-color 160ms ease, transform 120ms ease; }
.auth-dialog .submit-button:active:not(:disabled) { transform: scale(.985); }
.auth-dialog .submit-button .spinner,
.auth-dialog .submit-button .submit-done { display: none; }
.auth-dialog .submit-button.is-busy { cursor: wait; opacity: 1; }
.auth-dialog .submit-button.is-busy .submit-label { opacity: .78; }
.auth-dialog .submit-button.is-busy .spinner { display: inline-block; }
.auth-dialog .submit-button.is-done,
.auth-dialog .submit-button.is-done:disabled { opacity: 1; color: var(--on-accent); background: var(--success); cursor: default; }
.auth-dialog .submit-button.is-done .submit-label { display: none; }
.auth-dialog .submit-button.is-done .submit-done { display: grid; place-items: center; }
/* 成了：按钮轻轻鼓一下，和对勾一起在 T1 的时长里画完 */
.auth-dialog .submit-button.is-done { animation: auth-done-pop 320ms cubic-bezier(.2, .9, .3, 1.3); }
@keyframes auth-done-pop { 45% { transform: scale(1.025); } }
.auth-dialog .submit-done svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.auth-dialog .submit-done svg path { stroke-dasharray: 18; stroke-dashoffset: 0; animation: auth-draw 300ms cubic-bezier(.2, .8, .2, 1); }
@keyframes auth-draw { from { stroke-dashoffset: 18; } }

@media (max-width: 520px) {
  .account-dialog[data-view="login"] .auth-dialog-panel,
  .account-dialog[data-view="register"] .auth-dialog-panel { padding: 20px 18px 22px; }
}

/* 手机上点过眼睛、小签后不留一块「悬停」灰底 */
@media (hover: none) {
  .auth-dialog .password-toggle:hover { color: var(--muted); background: transparent; }
  .auth-dialog .auth-chip:hover:not(:disabled) { color: var(--muted); border-color: var(--border); background: var(--surface); }
  .auth-dialog .auth-icon-button:hover { color: var(--muted); background: transparent; }
}

@media (prefers-reduced-motion: reduce) {
  .auth-dialog *, .auth-dialog *::before, .auth-dialog *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .auth-dialog[open], .auth-dialog[open]::backdrop { animation: none; }
}
:root.rm .auth-dialog[open], :root.rm .auth-dialog[open]::backdrop,
:root.rm .auth-dialog *, :root.rm .auth-dialog *::before, :root.rm .auth-dialog *::after { animation: none !important; transition: none !important; }