/*
 * Unbound 统一登录 · 自建 Experience 页面样式（v11：单卡片精修 + 浮动标签）
 * ------------------------------------------------------------------
 * 相对 unb10 的改动：
 *   1) 卡片排版换为「方案 B · 单卡片精修」：460px 单列卡片 + 浮动标签输入 + 顶部图形标志；
 *   2) 新增：密码显隐眼睛、密码强度实时条、Caps Lock 提示、条款勾选、按钮 loading 转圈；
 *   3) 动效只保留「淡入」：卡片首屏淡入一次；步骤切换仅一次 0.2s 透明度过渡。
 *      删掉了原先造成卡顿的两处：.bg-glow 的全屏 scale 呼吸动画（改为静态绝对层）、
 *      render() 里用 offsetWidth 强制回流重播动画（改为只切不重播）。
 *
 * 设计 token 两级：
 *   1) index.html 的 resolveTheme() 按当前 appId 注入品牌色（--brand 系列）；
 *   2) <html data-family> 决定整套设计语言 + 官网同款页头页脚：
 *        - 缺省 / browser ：对齐 https://browser.unb.ink （浅色 Apple 风 + 该站页头页脚）
 *        - unb           ：对齐 https://unb.ink （深色工作室风 + 该站页头页脚）
 *
 * 页头/页脚结构由 login-unb11.js 按 window.UNB_CHROME 渲染，本文件的组件类名与之对应：
 *   浅色（浏览器站）  .brand-logo / .nav-links a / .cta--ghost|primary / .footer-grid / .footer-bottom
 *   深色（工作室站）  .brand-mark / .nav-link(em+span) / .lang-switch
 *                     / .footer-top / .footer-prods / .footer-bar
 *
 * 品牌色优先级：应用级 color.primaryColor > 主题表 accent > 此处缺省紫 #6139F6。
 * 素材走同源 /branding/*（nginx 已挂 location ^~ /branding/）。
 * 文件名带 -unb11：Cloudflare 对静态资源按 URL 缓存 7 天，改内容必须换文件名才生效。
 */

/* ============ 缺省（浅色 Apple 风）：指纹浏览器站 / 管理台兜底 ============ */
:root {
  color-scheme: light;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text",
    "PingFang SC", "Segoe UI", "Hiragino Sans GB", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas,
    "JetBrains Mono", "Courier New", monospace;

  /* 品牌色：由 resolveTheme() 覆盖 */
  --brand: #6139f6;
  --brand-hover: #4f2bd4;
  --brand-ring: rgba(97, 57, 246, 0.16);
  --brand-soft: rgba(97, 57, 246, 0.06);
  --brand-lite: #9a7cf8;
  --brand-link: var(--brand);

  /* 表面 */
  --bg: #f5f5f7;
  --bg-alt: #fbfbfd;
  --panel: #ffffff;
  --panel-2: #ffffff;
  --text: #1d1d1f;
  --dim: #6e6e73;
  --mute: #8e8e93;
  --line: rgba(0, 0, 0, 0.08);
  --line-2: rgba(0, 0, 0, 0.14);

  /* 形状 */
  --radius: 20px;
  --radius-sm: 14px;
  --btn-radius: 980px;
  --btn-weight: 600;
  --btn-h: 44px;
  --field-h: 58px;
  --card-shadow: 0 12px 40px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);

  /* 页头 */
  --hdr-h: 64px;
  --hdr-bg: rgba(251, 251, 253, 0.78);
  --hdr-blur: saturate(180%) blur(20px);

  /* 标题 */
  --title-size: 22px;
  --title-weight: 600;
  --title-spacing: -0.01em;
  --sub-size: 13px;

  /* 状态色 */
  --danger: #ff3b30;
  --danger-bg: rgba(255, 59, 48, 0.08);
  --danger-line: rgba(255, 59, 48, 0.24);
  --warn: #ff9f0a;
  --ok: #34c759;

  --glow-opacity: 1;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ============ 深色工作室风：Unbound 官网 https://unb.ink ============ */
:root[data-family="unb"] {
  color-scheme: dark;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --bg: #09090b;
  --bg-alt: #09090b;
  --panel: #0f0f12;
  --panel-2: #141418;
  --text: #fafafa;
  --dim: #8b8b95;
  --mute: #5c5c66;
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.17);

  --radius: 10px;
  --radius-sm: 7px;
  --btn-radius: 8px;
  --btn-weight: 700;
  --card-shadow: 0 20px 46px rgba(0, 0, 0, 0.45);

  --hdr-h: 70px;
  --hdr-bg: rgba(9, 9, 11, 0.95);
  --hdr-blur: none;

  --title-size: 26px;
  --title-weight: 700;
  --title-spacing: -0.025em;

  --danger: #f87171;
  --danger-bg: rgba(220, 38, 38, 0.14);
  --danger-line: rgba(248, 113, 113, 0.3);
  --warn: #fbbf24;
  --ok: #4ade80;

  /* 深色下用更亮的品牌色作为链接/强调文字色（由 resolveTheme() 注入） */
  --brand-link: var(--brand-lite);
  --glow-opacity: 0.6;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

/* 卡片后方的品牌色光晕：静态层，跟随当前应用主题色。
   上一版此处是全屏 fixed + scale 呼吸动画，造成大面积重绘卡顿，本版改绝对定位且不动画。 */
.bg-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: var(--glow-opacity);
  z-index: 0;
  background:
    radial-gradient(60% 50% at 50% 0%, var(--brand-ring), transparent 70%),
    radial-gradient(40% 40% at 85% 100%, var(--brand-soft), transparent 70%);
}

/* ==================== 页头：无界指纹浏览器官网同款 ==================== */

.hdr {
  position: relative;
  z-index: 2;
  flex: none;
  background: var(--hdr-bg);
  -webkit-backdrop-filter: var(--hdr-blur);
  backdrop-filter: var(--hdr-blur);
  border-bottom: 1px solid var(--line);
}

.hdr-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: var(--hdr-h);
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  display: block;
}

.brand-mark {
  flex-shrink: 0;
  display: flex;
  height: 26px;
}

.brand-mark img {
  display: block;
  height: 100%;
  width: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.brand-text strong {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-text em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-links a {
  font-size: 14px;
  color: var(--dim);
  padding: 8px 14px;
  border-radius: 980px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.05);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 9px 18px;
  border-radius: 980px;
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.cta--ghost {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text);
}

.cta--ghost:hover {
  background: rgba(0, 0, 0, 0.09);
}

.cta--ghost.active {
  background: var(--brand-soft);
  color: var(--brand);
}

.cta--primary {
  background: var(--brand);
  color: #fff;
}

.cta--primary:hover {
  background: var(--brand-hover);
}

.lang-switch {
  display: none;
}

/* ------- 页头：无界工作室官网同款（深色） ------- */

:root[data-family="unb"] .hdr-inner {
  gap: 20px;
}

:root[data-family="unb"] .brand {
  gap: 11px;
}

:root[data-family="unb"] .brand-text strong {
  font-size: 17px;
}

:root[data-family="unb"] .brand-text em {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brand-link);
  margin-top: 3px;
}

:root[data-family="unb"] .nav-links {
  gap: 0;
}

:root[data-family="unb"] .nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 5px 14px;
  text-decoration: none;
}

:root[data-family="unb"] .nav-link em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 9px;
  line-height: 1;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  transition: color 0.2s var(--ease);
}

:root[data-family="unb"] .nav-link span {
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--dim);
  transition: color 0.2s var(--ease);
}

/* 官网导航项之间的 1px 竖线 */
:root[data-family="unb"] .nav-link + .nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 17px;
  background: var(--line-2);
}

:root[data-family="unb"] .nav-link:hover em,
:root[data-family="unb"] .nav-link.active em {
  color: var(--brand-link);
}

:root[data-family="unb"] .nav-link:hover span,
:root[data-family="unb"] .nav-link.active span {
  color: var(--text);
}

:root[data-family="unb"] .cta--ghost {
  margin-left: 18px;
  height: 34px;
  padding: 0 18px;
  border-radius: 7px;
  border-color: var(--line-2);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
}

:root[data-family="unb"] .cta--ghost:hover {
  color: var(--brand-link);
  border-color: var(--brand-ring);
  background: transparent;
}

:root[data-family="unb"] .lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 10px;
  padding-left: 12px;
  border-left: 1px solid var(--line-2);
}

:root[data-family="unb"] .lang-switch a {
  padding: 5px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

:root[data-family="unb"] .lang-switch a:hover {
  color: var(--text);
  background: rgba(127, 127, 150, 0.12);
}

:root[data-family="unb"] .lang-switch a.active {
  color: var(--brand-link);
}

/* ==================== 主体（登录卡片 · 方案 B） ==================== */

.auth {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 24px;
}

.card {
  position: relative;
  width: 100%;
  max-width: 460px;
  /* 极浅的纵向渐变，卡片不再是一块纯色 */
  background-color: var(--panel);
  background-image: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 34px 32px 30px;
  box-shadow: var(--card-shadow);
  animation: cardIn 0.42s var(--ease) both;
}

/* 卡片顶边的品牌色发丝线，跟随当前应用主题色 */
.card::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: -1px;
  height: 1px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
  opacity: 0.55;
}

.card-head {
  margin-bottom: 22px;
  text-align: center;
}

/* 卡片顶部品牌标志：浅色主题是 512×512 方形应用图标，深色主题是 300×184 横向字标，
   因此不能写死成正方形，否则字标会被压扁 → 统一用「定高 + 宽度自适应 + contain」 */
.card-mark {
  display: block;
  margin: 0 auto 14px;
  height: 40px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.card-head h1 {
  margin: 0 0 6px;
  font-size: 25px;
  line-height: 1.3;
  font-weight: var(--title-weight);
  letter-spacing: -0.02em;
}

.card-head .sub {
  margin: 0;
  font-size: var(--sub-size);
  color: var(--dim);
  line-height: 1.5;
  word-break: break-word;
}

/* ------------------------------ 步骤指示器 ------------------------------ */
/* 连接线必须是「单元格内的弹性尾巴」：li 定宽均分 + ::after 吃掉剩余空间，
   否则标签会被挤到各自单元格右侧，三个步骤的间距看起来忽大忽小 */
.steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  align-items: center;
}

.steps li {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 1;
  min-width: 0;
}

.steps li:last-child {
  flex: none;
}

.steps li:not(:last-child)::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-2);
  margin-left: 8px;
}

.steps li.done:not(:last-child)::after {
  background: var(--brand);
}

.steps li i {
  width: 20px;
  height: 20px;
  flex: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  font-style: normal;
  border: 1px solid var(--line-2);
  color: var(--mute);
  font-family: var(--font-mono);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease),
    color 0.25s var(--ease);
}

.steps li span {
  font-size: 11.5px;
  color: var(--mute);
  white-space: nowrap;
}

.steps li.done i {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.steps li.done span {
  color: var(--dim);
}

.steps li.cur i {
  border-color: var(--brand);
  color: var(--brand);
}

.steps li.cur span {
  color: var(--text);
}

/* 视图容器：步骤切换时只做一次透明度过渡（0.2s），不做位移/重播动画 */
.swap {
  transition: opacity 0.2s var(--ease);
}

/* 提示条：默认错误样式，--ok 为信息样式 */
.notice {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.5;
  background: var(--danger-bg);
  border: 1px solid var(--danger-line);
  color: var(--danger);
}

.notice--ok {
  background: var(--brand-soft);
  border-color: var(--brand-ring);
  color: var(--brand-link);
}

/* ------------------------------ 登录入口切换（分段控件） ------------------------------ */

.seg {
  display: flex;
  width: 100%;
  gap: 2px;
  padding: 3px;
  margin-bottom: 18px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.seg-btn {
  flex: 1;
  font: inherit;
  font-size: 13px;
  padding: 8px 16px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--dim);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.seg-btn:hover {
  color: var(--text);
}

.seg-btn.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

:root[data-family="unb"] .seg-btn.active {
  background: #26262c;
  box-shadow: none;
}

/* ------------------------------ 表单 ------------------------------ */

.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fields {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fld {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.fld-control {
  position: relative;
}

/* 浮动标签：
   line-height 必须锁死为 1，否则行盒高度不会随字号收缩，上浮后的标签会压到输入文字上。
   上浮后标签占 9px ~ 20px；输入文字行从 padding-top 26px 开始 → 净空 6px。 */
.fld-label {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1;
  letter-spacing: 0;
  text-transform: none;
  color: var(--mute);
  transition: top 0.18s var(--ease), font-size 0.18s var(--ease),
    color 0.18s var(--ease);
}

.fld-control:focus-within .fld-label,
.fld-control.is-filled .fld-label {
  top: 9px;
  transform: translateY(0);
  font-size: 11px;
}

.fld-control:focus-within .fld-label {
  color: var(--brand-link);
}

.fld-input {
  width: 100%;
  height: 58px;
  padding: 26px 14px 6px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: var(--panel-2);
  outline: none;
  transition: border-color 0.15s var(--ease), box-shadow 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.fld-input::placeholder {
  color: var(--mute);
}

.fld-input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-ring);
  background: var(--panel);
}

.fld.has-eye .fld-input {
  padding-right: 44px;
}

/* 密码显隐眼睛：控件高 58 / 上内边距 26 / 下内边距 6 → 文字行中心距顶 39，
   故上浮态图标中心也对齐到 39（top = 39 - 34/2 = 22）；空态未聚焦时回到控件中心 29 */
.eye {
  position: absolute;
  right: 4px;
  top: 12px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--mute);
  cursor: pointer;
  transition: top 0.18s var(--ease), color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.fld-control:focus-within .eye,
.fld-control.is-filled .eye {
  top: 22px;
}

.eye:hover {
  color: var(--text);
  background: var(--brand-soft);
}

.eye:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}

.eye svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fld.is-error .fld-label {
  color: var(--danger);
}

.fld.is-error .fld-input {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-bg);
}

/* Caps Lock 提示 */
.caps {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 11.5px;
  color: var(--warn);
}

.caps svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.caps[hidden] {
  display: none;
}

/* ------------------------------ 密码强度 ------------------------------ */

.pw {
  margin: 2px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pw-bars {
  display: flex;
  gap: 5px;
}

.pw-bars i {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--line-2);
  transition: background-color 0.25s var(--ease);
}

.pw[data-score="1"] .pw-bars i:nth-child(-n + 1) {
  background: var(--danger);
}

.pw[data-score="2"] .pw-bars i:nth-child(-n + 2) {
  background: var(--warn);
}

.pw[data-score="3"] .pw-bars i:nth-child(-n + 3) {
  background: var(--ok);
}

.pw[data-score="4"] .pw-bars i {
  background: var(--ok);
}

.pw-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pw-rules li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--mute);
  transition: color 0.2s var(--ease);
}

.pw-rules li .pw-check {
  width: 12px;
  height: 12px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.pw-rules li.ok {
  color: var(--ok);
}

.pw-rules li.ok .pw-check {
  opacity: 1;
}

/* ------------------------------ 条款勾选 ------------------------------ */

.agree {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: 2px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--dim);
  cursor: pointer;
  user-select: none;
}

.agree input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.agree-box {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 1px;
  border: 1px solid var(--line-2);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--panel-2);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.agree-box svg {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity 0.16s var(--ease);
}

.agree input:checked + .agree-box {
  background: var(--brand);
  border-color: var(--brand);
}

.agree input:checked + .agree-box svg {
  opacity: 1;
}

.agree input:focus-visible + .agree-box {
  box-shadow: 0 0 0 3px var(--brand-ring);
}

.agree a {
  color: var(--brand-link);
  text-decoration: none;
}

.agree a:hover {
  text-decoration: underline;
}

.agree.is-error .agree-box {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-bg);
}

/* ------------------------------ 主按钮 ------------------------------ */

.btn-primary {
  position: relative;
  height: 48px;
  width: 100%;
  margin-top: 4px;
  border: 0;
  border-radius: var(--btn-radius);
  background-color: var(--brand);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0));
  color: #fff;
  font-size: 15px;
  font-weight: var(--btn-weight);
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 6px 18px -10px var(--brand);
  transition: background-color 0.2s var(--ease), opacity 0.2s var(--ease),
    transform 0.16s var(--ease), box-shadow 0.2s var(--ease);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--brand-hover);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px -12px var(--brand);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0) scale(0.99);
  box-shadow: 0 4px 12px -8px var(--brand);
}

.btn-primary:disabled {
  opacity: 0.72;
  cursor: default;
}

.btn-primary .spin {
  display: inline-block;
  width: 15px;
  height: 15px;
  margin-right: 8px;
  vertical-align: -3px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.68s linear infinite;
}

.btn-primary .spin[hidden] {
  display: none;
}

.card-foot {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  flex-wrap: wrap;
}

.card-foot a {
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--brand-link);
  text-decoration: none;
  transition: background-color 0.2s var(--ease);
}

.card-foot a:hover {
  background: var(--brand-soft);
}

.card-foot .muted,
.card-foot .dot {
  color: var(--dim);
}

.card-foot a[aria-disabled="true"] {
  color: var(--mute);
  pointer-events: none;
}

/* ==================== 页脚：无界指纹浏览器官网同款 ==================== */

.ftr {
  position: relative;
  z-index: 1;
  flex: none;
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 52px 0 32px;
}

.ftr-inner {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  gap: 14px;
  max-width: 420px;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  flex-shrink: 0;
  display: block;
}

.footer-brand strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.footer-brand p {
  margin: 0;
  font-size: 13px;
  color: var(--dim);
  line-height: 1.65;
}

.footer-links {
  display: flex;
  gap: 4px 8px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 13.5px;
  color: var(--dim);
  padding: 6px 12px;
  border-radius: 980px;
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.footer-links a:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.05);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px 40px;
  flex-wrap: wrap;
}

.footer-legal {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-legal p {
  margin: 0;
  font-size: 12.5px;
  color: var(--mute);
  line-height: 1.65;
  max-width: 640px;
}

.footer-maker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
}

.footer-maker-logo {
  height: 35px;
  width: auto;
  flex-shrink: 0;
  display: block;
}

.footer-maker-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.footer-maker-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-maker-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--text);
  transition: color 0.25s var(--ease);
}

.footer-maker-en {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  line-height: 1;
  color: var(--mute);
}

.footer-maker-sub {
  font-size: 11.5px;
  line-height: 1;
  color: var(--mute);
  transition: color 0.25s var(--ease);
}

.footer-maker:hover .footer-maker-name,
.footer-maker:hover .footer-maker-sub {
  color: var(--brand);
}

/* ------- 页脚：无界工作室官网同款（深色） ------- */

:root[data-family="unb"] .ftr {
  padding: 64px 0 34px;
  overflow: hidden;
}

/* 官网页脚的点阵纹理 */
:root[data-family="unb"] .ftr::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 80%);
  mask-image: linear-gradient(180deg, #000, transparent 80%);
  pointer-events: none;
}

:root[data-family="unb"] .ftr-inner {
  position: relative;
  z-index: 1;
}

:root[data-family="unb"] .footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
  padding-bottom: 40px;
}

:root[data-family="unb"] .footer-lead {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

:root[data-family="unb"] .footer-brand {
  align-items: center;
  gap: 13px;
  max-width: none;
}

:root[data-family="unb"] .footer-brand img {
  width: auto;
  height: 34px;
  border-radius: 0;
}

:root[data-family="unb"] .footer-brand strong {
  font-size: 19px;
  color: #fafafa;
  margin-bottom: 0;
}

:root[data-family="unb"] .footer-brand p {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

:root[data-family="unb"] .footer-claim {
  margin: 0;
  font-size: clamp(19px, 2.1vw, 25px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #a1a1aa;
}

:root[data-family="unb"] .footer-prods {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

:root[data-family="unb"] .footer-prods a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.015);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

:root[data-family="unb"] .footer-prods a:hover {
  border-color: rgba(129, 140, 248, 0.3);
  background: rgba(255, 255, 255, 0.035);
}

:root[data-family="unb"] .footer-prods img {
  width: 28px;
  height: 28px;
  flex: none;
  display: block;
}

:root[data-family="unb"] .footer-prods b {
  flex: 1;
  font-size: 14.5px;
  font-weight: 700;
  color: #fafafa;
}

:root[data-family="unb"] .footer-prods .ic {
  width: 15px;
  height: 15px;
  flex: none;
  color: var(--mute);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

:root[data-family="unb"] .footer-prods a:hover .ic {
  color: var(--brand-link);
  transform: translate(2px, -2px);
}

:root[data-family="unb"] .footer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

:root[data-family="unb"] .footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-left: -11px;
}

:root[data-family="unb"] .footer-nav a {
  padding: 6px 11px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

:root[data-family="unb"] .footer-nav a:hover {
  color: #fafafa;
  background: rgba(255, 255, 255, 0.06);
}

:root[data-family="unb"] .footer-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

:root[data-family="unb"] .footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.noscript {
  position: relative;
  z-index: 1;
  margin: 0 auto 24px;
  padding: 12px 16px;
  max-width: 420px;
  border-radius: var(--radius-sm);
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

/* ==================== 响应式 ==================== */

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  :root[data-family="unb"] .lang-switch {
    display: none;
  }

  .cta {
    margin-left: auto;
  }

  :root[data-family="unb"] .cta--ghost {
    margin-left: auto;
  }
}

@media (max-width: 560px) {
  .hdr-inner,
  .ftr-inner {
    width: 100%;
    padding: 0 16px;
  }

  .brand-logo {
    width: 28px;
    height: 28px;
  }

  .brand-text strong {
    font-size: 14px;
  }

  .cta {
    padding: 8px 14px;
    font-size: 12.5px;
  }

  .auth {
    padding: 32px 16px;
  }

  .card {
    padding: 26px 22px 24px;
  }

  .card-head h1 {
    font-size: 22px;
  }

  .footer-grid {
    flex-direction: column;
    gap: 28px;
  }

  :root[data-family="unb"] .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  :root[data-family="unb"] .footer-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
}

/* ==================== 动效（只保留淡入） ==================== */
/* 登录页是功能页，动效克制：卡片首屏淡入一次；步骤切换由 JS 给 .swap 切一次透明度。
   全部只用 opacity / transform，不做强制回流重播、不做全屏循环动画。 */

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(7px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes spin {
  to {
    transform: rotate(1turn);
  }
}

/* 无障碍兜底：系统开启「减弱动态效果」时，停掉全部动画与过渡 */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}