/* ================================================================
   觅智统一顶栏样式 · Apple Liquid Glass
   - 顶部贴顶胶囊（fixed top:0 / 左右 0 铺满，下缘 18px 圆角）
   - 多层 backdrop-filter + 高光线 + 折射边
   - 滚动联动：condensed / scrolled / 反弹
   - 自适应 color-scheme（light / dark / no-preference）
   - nav-item / login-btn 液态按钮（按下涟漪 + 折射扭曲 SVG）
   - 严格降级：老浏览器 / prefers-reduced-transparency / prefers-reduced-motion
   ================================================================ */

:root {
  /* === Apple Liquid Glass 设计令牌 === */
  --lg-base-light: #f5f5f7;
  --lg-base-dark:  #0a0e27;

  /* 玻璃本体（更透，让环境穿透感更强） */
  --lg-bg-light:    rgba(255, 255, 255, 0.42);
  --lg-bg-dark:     rgba(20, 24, 60, 0.55);

  /* 滚动后：再降透明度，模糊更强 */
  --lg-bg-light-condensed:    rgba(255, 255, 255, 0.28);
  --lg-bg-dark-condensed:     rgba(20, 24, 60, 0.38);

  /* 模糊与饱和（Liquid Glass 标志性 saturate 200%） */
  --lg-blur:        blur(24px) saturate(200%);
  --lg-blur-strong: blur(36px) saturate(220%);

  /* 描边：1px 折射线 */
  --lg-stroke-light: rgba(255, 255, 255, 0.55);
  --lg-stroke-dark:  rgba(255, 255, 255, 0.12);

  /* 顶部高光（Liquid Glass 招牌） */
  --lg-highlight-light: rgba(255, 255, 255, 0.75);
  --lg-highlight-dark:  rgba(255, 255, 255, 0.18);

  /* 落地阴影 */
  --lg-shadow-light: rgba(15, 23, 42, 0.06);
  --lg-shadow-dark:  rgba(0, 0, 0, 0.45);

  /* 圆角 */
  --lg-radius-bar:    18px;
  --lg-radius-ctl:    12px;
  --lg-radius-chip:   999px;

  /* 动效曲线（与 Apple 同语） */
  --lg-ease:      cubic-bezier(0.32, 0.72, 0, 1);
  --lg-ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --lg-dur:       360ms;
  --lg-dur-quick: 200ms;

  /* ===== 业务色（沿用项目既有） ===== */
  --topbar-bg: var(--lg-bg-light);
  --topbar-border: #e5e7eb;
  --topbar-accent: #4a5ce0;
  --topbar-accent-hover: #3a4bc7;
  --topbar-text: #0f172a;
  --topbar-text-secondary: #475569;
  --topbar-text-muted: #64748b;
  --topbar-text-hint: #94a3b8;
  --topbar-text-on-accent: #ffffff;
  --topbar-bg-soft: rgba(74, 92, 224, 0.08);
  --topbar-bg-muted: #f3f4f6;
  --topbar-bg-elev: #ffffff;
  --topbar-border-input: #cbd5e1;
  --topbar-border-soft: #e5e7eb;
  --topbar-danger: #dc2626;
  --topbar-success: #10b981;
}

/* 深色自适配：当系统或页面声明 dark color-scheme，
   顶栏自动切换为深玻璃；用户也可通过 .topbar--dark 强制。 */
@media (prefers-color-scheme: dark) {
  :root:not(.topbar--light) {
    --topbar-bg: var(--lg-bg-dark);
    --topbar-border: rgba(255, 255, 255, 0.12);
    --topbar-text: #f1f5f9;
    --topbar-text-secondary: #cbd5e1;
    --topbar-text-muted: #94a3b8;
    --topbar-text-hint: #64748b;
    --topbar-bg-muted: rgba(255, 255, 255, 0.08);
    --topbar-bg-elev: rgba(20, 24, 60, 0.85);
    --topbar-border-soft: rgba(255, 255, 255, 0.08);
    --topbar-border-input: rgba(255, 255, 255, 0.18);
    /* 深色玻璃上用提亮一档的靛紫，保证登录/激活态文字对比度 */
    --topbar-accent: #9aa5f2;
    --topbar-accent-hover: #8792ee;
    --topbar-bg-soft: rgba(154, 165, 242, 0.1);
  }
}
.topbar--dark {
  --topbar-bg: var(--lg-bg-dark);
  --topbar-border: rgba(255, 255, 255, 0.12);
  --topbar-text: #f1f5f9;
  --topbar-text-secondary: #cbd5e1;
  --topbar-text-muted: #94a3b8;
  --topbar-text-hint: #64748b;
  --topbar-bg-muted: rgba(255, 255, 255, 0.08);
  --topbar-bg-elev: rgba(20, 24, 60, 0.85);
  --topbar-border-soft: rgba(255, 255, 255, 0.08);
  --topbar-border-input: rgba(255, 255, 255, 0.18);
  /* 深色玻璃上用提亮一档的靛紫，保证登录/激活态文字对比度 */
  --topbar-accent: #9aa5f2;
  --topbar-accent-hover: #8792ee;
  --topbar-bg-soft: rgba(154, 165, 242, 0.1);
}

/* ---------- 顶栏胶囊主体 ---------- */

/* slot 挂载页的流占位（fixed 胶囊不占文档流，由 topbar.js 注入并按实测高度写 inline height；
   55px = 0px 顶距 + 55px 胶囊高（紧贴无缝隙），作为 JS 失效时的兜底） */
.topbar-flow-spacer {
  width: 100%;
  height: 55px;
  flex: 0 0 auto;
  pointer-events: none;
}

/* 盒模型自包含：顶栏按主站 border-box 设计，不依赖页面级 reset
   （主题页 sub.css 原钉回块已删除，职责移入本文件） */
.topbar,
.topbar * {
  box-sizing: border-box;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 12px 22px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 28px;

  /* 字体栈钉死（与 /pages/index.html 黄金基线一致，避免继承各页 body 字体） */
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", MiSans, "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* Liquid Glass 本体 */
  background: var(--topbar-bg);
  -webkit-backdrop-filter: var(--lg-blur);
          backdrop-filter: var(--lg-blur);
  border: 1px solid var(--lg-stroke-light);
  /* 贴顶铺满：上缘方角贴合视口，仅保留下缘圆角 */
  border-radius: 0 0 var(--lg-radius-bar) var(--lg-radius-bar);
  box-shadow:
    inset 0 1px 0.5px var(--lg-highlight-light),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.25),
    0 8px 24px var(--lg-shadow-light),
    0 1px 2px rgba(15, 23, 42, 0.04);

  /* 状态过渡 */
  transition:
    background var(--lg-dur) var(--lg-ease),
    backdrop-filter var(--lg-dur) var(--lg-ease),
    box-shadow var(--lg-dur) var(--lg-ease),
    transform var(--lg-dur) var(--lg-ease),
    padding var(--lg-dur) var(--lg-ease);

  will-change: transform, backdrop-filter;
}

/* 深色变体 */
.topbar--dark {
  border-color: var(--lg-stroke-dark);
  box-shadow:
    inset 0 1px 0.5px var(--lg-highlight-dark),
    inset 0 -1px 0.5px rgba(255, 255, 255, 0.06),
    0 8px 28px var(--lg-shadow-dark),
    0 1px 2px rgba(0, 0, 0, 0.2);
}
@media (prefers-color-scheme: dark) {
  :root:not(.topbar--light) .topbar {
    border-color: var(--lg-stroke-dark);
    box-shadow:
      inset 0 1px 0.5px var(--lg-highlight-dark),
      inset 0 -1px 0.5px rgba(255, 255, 255, 0.06),
      0 8px 28px var(--lg-shadow-dark),
      0 1px 2px rgba(0, 0, 0, 0.2);
  }
}

/* ---------- 滚动联动 ---------- */
.topbar--condensed {
  padding-top: 9px;
  padding-bottom: 9px;
}
.topbar--scrolled {
  -webkit-backdrop-filter: var(--lg-blur-strong);
          backdrop-filter: var(--lg-blur-strong);
  box-shadow:
    inset 0 1px 1px rgba(255, 255, 255, 0.9),
    0 12px 36px var(--lg-shadow-light);
}
.topbar--dark.topbar--scrolled {
  box-shadow:
    inset 0 1px 1px rgba(255, 255, 255, 0.32),
    0 12px 40px var(--lg-shadow-dark);
}
@media (prefers-color-scheme: dark) {
  :root:not(.topbar--light) .topbar--scrolled {
    box-shadow:
      inset 0 1px 1px rgba(255, 255, 255, 0.32),
      0 12px 40px var(--lg-shadow-dark);
  }
}

/* ---------- 液态动效：上滑反弹（仅 sticky topbar 动画，data-topbar-bounce 触发） ---------- */
.topbar--bounce {
  animation: lg-bounce 700ms var(--lg-ease-soft);
}
@keyframes lg-bounce {
  0%   { transform: translateY(0) scale(1); }
  20%  { transform: translateY(2px) scale(1.005, 0.985); }
  45%  { transform: translateY(2px) scale(0.996, 1.006); }
  70%  { transform: translateY(1px) scale(1.001, 0.999); }
  100% { transform: translateY(0) scale(1); }
}

/* ---------- 滚动边缘渐隐（scroll edge effect） ---------- */
.topbar-scroll-fade {
  position: absolute;
  left: 0; right: 0;
  top: 100%;
  height: 22px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.18), transparent);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--lg-dur) var(--lg-ease);
}
.topbar--dark .topbar-scroll-fade {
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.22), transparent);
}
.topbar--scrolled .topbar-scroll-fade { opacity: 1; }

/* ---------- 通用布局 ---------- */
.wordmark { justify-self: start; font-size: 17px; line-height: 1; }
.product-nav { justify-self: center; flex: 0 0 auto; font-size: 16px; line-height: 1; }
.topbar-right { justify-self: end; font-size: 16px; line-height: 1; }
.topbar [hidden] { display: none !important; }

.product-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

/* ---------- 液态按钮：nav-item / login-btn / notice-btn / avatar-btn ---------- */
.lg-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;            /* 让 ::before / SVG 滤镜限定在本元素 */
  font-family: inherit;
  cursor: pointer;
  transition:
    transform var(--lg-dur-quick) var(--lg-ease),
    background-color var(--lg-dur-quick) var(--lg-ease),
    color var(--lg-dur-quick) var(--lg-ease),
    border-color var(--lg-dur-quick) var(--lg-ease),
    box-shadow var(--lg-dur-quick) var(--lg-ease);
  will-change: transform;
}
/* 全局 backdrop 滤镜容器（SVG feDisplacementMap 折射 + 涟漪） */
.lg-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity var(--lg-dur-quick) var(--lg-ease);
}
/* 折射 SVG 内嵌（每个按钮都走相同滤镜 #lg-refraction-filter） */
.lg-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(circle at var(--lg-x, 50%) var(--lg-y, 50%),
              rgba(255, 255, 255, 0.55) 0%,
              rgba(255, 255, 255, 0) 60%);
  opacity: 0;
  transition: opacity 220ms var(--lg-ease);
  mix-blend-mode: screen;
}
.lg-btn:active::after { opacity: 1; }
.lg-btn:hover::after { opacity: 0.5; }

/* ---------- nav-item（mini glass pill + 涟漪） ---------- */
.nav-item {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--lg-radius-chip);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--topbar-text);
  background: rgba(255, 255, 255, 0.28);
  -webkit-backdrop-filter: blur(8px) saturate(180%);
          backdrop-filter: blur(8px) saturate(180%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transition:
    transform var(--lg-dur-quick) var(--lg-ease),
    background-color var(--lg-dur-quick) var(--lg-ease),
    color var(--lg-dur-quick) var(--lg-ease),
    border-color var(--lg-dur-quick) var(--lg-ease),
    box-shadow var(--lg-dur-quick) var(--lg-ease);
}
.nav-item:hover {
  background: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}
.nav-item:active { transform: translateY(0) scale(0.97); }
.nav-item:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 2px;
}
.nav-item.active {
  background: var(--topbar-accent);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 4px 12px rgba(74, 92, 224, 0.35);
}

/* ---------- cat-pill 视觉升级（继承 .nav-item，叠加 play.html cat-pill 镜面） ----------
   顶部 nav 现在双类名：.nav-item.cat-pill。
   本块把原蓝色 active 升级为「白色玻璃 active + pointer-follow 镜面高光」，
   与 play.html 的 .cat-pill 视觉一致；镜面高光的指针跟踪由 js/liquid-pill.js 写入
   --lg-x / --lg-y CSS 变量，本处只负责 ::before 渲染与状态过渡。 */
.nav-item.cat-pill {
  position: relative;
  overflow: hidden;
  /* 兜底变量：未跟踪时镜面高光落在中心 */
  --lg-x: 50%;
  --lg-y: 50%;
  /* 字号钉死基线 12.5px：本选择器 (0,2,0) 压过 play.css .cat-pill (0,1,0) 的 13px
     （play.css 的 .cat-pill 规则不可删，内容区分类胶囊共用该类） */
  font-size: 12.5px;
}
.nav-item.cat-pill::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    circle at var(--lg-x, 50%) var(--lg-y, 50%),
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0) 50%
  );
  opacity: 0;
  transition: opacity 220ms var(--lg-ease, ease);
  z-index: 0;
}
.nav-item.cat-pill:hover::before {
  opacity: 0.45;
}
/* 把 pill 内容（文字）提到 ::before 之上 */
.nav-item.cat-pill > * {
  position: relative;
  z-index: 1;
}
/* active：从蓝色实色升级为白色玻璃（与 play.html .cat-pill.active 对齐） */
.nav-item.cat-pill.active {
  background: rgba(255, 255, 255, 0.85);
  color: #0f172a;
  border-color: rgba(255, 255, 255, 0.6);
  font-weight: 600;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 3px 10px rgba(15, 23, 42, 0.12);
}
.nav-item.cat-pill.active::before {
  opacity: 1;
}
.nav-item.cat-pill.active:hover {
  background: rgba(255, 255, 255, 0.92);
}
/* 暗色顶栏下：active 玻璃态反相（深玻璃 + 白字） */
.topbar--dark .nav-item.cat-pill.active {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 4px 14px rgba(0, 0, 0, 0.35);
}
.topbar--dark .nav-item.cat-pill.active:hover {
  background: rgba(255, 255, 255, 0.22);
}

/* ---------- 桌面端导航下拉（IQ 俱乐部）----------
   面板是顶栏 Liquid Glass 的连续延伸：同材质半透玻璃 + 顶部高光线 + 柔光，
   从胶囊里「长出」（lg-pop 动效，origin top center），不使用小箭头。
   显隐三态：:hover（鼠标）/ :focus-within（键盘）/ .is-tap-open（触屏 JS 兜底）。 */
:root {
  --lg-menu-bg: rgba(255, 255, 255, 0.76);
  --lg-menu-stroke: rgba(255, 255, 255, 0.6);
  --lg-menu-tag-bg: rgba(15, 23, 42, 0.05);
  --lg-menu-sep: rgba(15, 23, 42, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root:not(.topbar--light) {
    --lg-menu-bg: rgba(20, 24, 60, 0.84);
    --lg-menu-stroke: rgba(255, 255, 255, 0.14);
    --lg-menu-tag-bg: rgba(255, 255, 255, 0.08);
    --lg-menu-sep: rgba(255, 255, 255, 0.1);
  }
}
.topbar--dark {
  --lg-menu-bg: rgba(20, 24, 60, 0.84);
  --lg-menu-stroke: rgba(255, 255, 255, 0.14);
  --lg-menu-tag-bg: rgba(255, 255, 255, 0.08);
  --lg-menu-sep: rgba(255, 255, 255, 0.1);
}

.nav-drop {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.nav-drop .nav-item { white-space: nowrap; }
.nav-item-label { display: inline-block; }

/* 主标签右侧线性 chevron：默认半隐，hover/展开只提亮、不翻转 */
.nav-chevron {
  width: 10px;
  height: 10px;
  margin-left: 5px;
  margin-top: -1px;
  opacity: 0.5;
  transition: opacity 0.2s var(--lg-ease);
}
.nav-drop:hover > .nav-item .nav-chevron,
.nav-drop:focus-within > .nav-item .nav-chevron,
.nav-drop.is-tap-open > .nav-item .nav-chevron {
  opacity: 0.95;
}

/* 桥接区：胶囊与面板之间 6px 透明热区，让鼠标移向面板时 hover 不中断 */
.nav-drop::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 6px;
}

/* 面板本体：半透玻璃（透出页面星图）+ 顶部高光线 + 柔光 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(-5px) scale(0.97);
  transform-origin: top center;
  min-width: 232px;
  padding: 6px;
  background: var(--lg-menu-bg);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
          backdrop-filter: blur(40px) saturate(200%);
  border: 1px solid var(--lg-menu-stroke);
  border-radius: 16px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 12px 32px rgba(15, 23, 42, 0.12),
    0 2px 8px rgba(15, 23, 42, 0.06);
  display: flex;
  flex-direction: column;
  gap: 1px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.2s var(--lg-ease),
    transform 0.26s var(--lg-ease),
    visibility 0s linear 0.2s;
  z-index: 92;
}
.nav-drop:hover > .nav-dropdown,
.nav-drop:focus-within > .nav-dropdown,
.nav-drop.is-tap-open > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
  transition:
    opacity 0.2s var(--lg-ease),
    transform 0.26s var(--lg-ease),
    visibility 0s linear 0s;
}

/* 菜单项：图标 + 主副标题 + 右侧阈值 chip */
.nav-drop-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 7px 10px;
  border-radius: 11px;
  color: var(--topbar-text);
  text-decoration: none;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-3px);
  transition:
    background-color 0.16s var(--lg-ease),
    opacity 0.2s var(--lg-ease),
    transform 0.24s var(--lg-ease);
}
/* 逐项 stagger：a 元素按类型计数，hairline(div) 不占序号 */
.nav-drop:hover > .nav-dropdown .nav-drop-item:nth-of-type(1),
.nav-drop:focus-within > .nav-dropdown .nav-drop-item:nth-of-type(1),
.nav-drop.is-tap-open > .nav-dropdown .nav-drop-item:nth-of-type(1) { opacity: 1; transform: none; transition-delay: 0.05s; }
.nav-drop:hover > .nav-dropdown .nav-drop-item:nth-of-type(2),
.nav-drop:focus-within > .nav-dropdown .nav-drop-item:nth-of-type(2),
.nav-drop.is-tap-open > .nav-dropdown .nav-drop-item:nth-of-type(2) { opacity: 1; transform: none; transition-delay: 0.085s; }
.nav-drop:hover > .nav-dropdown .nav-drop-item:nth-of-type(3),
.nav-drop:focus-within > .nav-dropdown .nav-drop-item:nth-of-type(3),
.nav-drop.is-tap-open > .nav-dropdown .nav-drop-item:nth-of-type(3) { opacity: 1; transform: none; transition-delay: 0.12s; }
.nav-drop:hover > .nav-dropdown .nav-drop-item:nth-of-type(4),
.nav-drop:focus-within > .nav-dropdown .nav-drop-item:nth-of-type(4),
.nav-drop.is-tap-open > .nav-dropdown .nav-drop-item:nth-of-type(4) { opacity: 1; transform: none; transition-delay: 0.155s; }

.nav-drop-ico {
  flex: none;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  color: var(--topbar-accent);
  background: var(--topbar-bg-soft);
  transition: background-color 0.16s var(--lg-ease);
}
.nav-drop-ico svg { width: 15px; height: 15px; display: block; }

.nav-drop-txt {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.25;
}
.nav-drop-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--topbar-text);
  transition: color 0.16s var(--lg-ease);
}
.nav-drop-sub {
  font-size: 10.5px;
  letter-spacing: 0.03em;
  color: var(--topbar-text-muted);
}
.nav-drop-tag {
  flex: none;
  align-self: center;
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--topbar-text-muted);
  background: var(--lg-menu-tag-bg);
}

.nav-drop-sep {
  height: 1px;
  margin: 5px 8px;
  background: var(--lg-menu-sep);
}

.nav-drop-item:hover { background: rgba(74, 92, 224, 0.09); }
.nav-drop-item:hover .nav-drop-title { color: var(--topbar-accent); }
.nav-drop-item:hover .nav-drop-ico { background: rgba(74, 92, 224, 0.16); }
.nav-drop-item:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 1px;
}

/* 当前页行：左指示条 + 标题主色 */
.nav-drop-item.active { background: var(--topbar-bg-soft); }
.nav-drop-item.active::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  width: 2.5px;
  height: 18px;
  border-radius: 2px;
  background: var(--topbar-accent);
}
.nav-drop-item.active .nav-drop-title { color: var(--topbar-accent); font-weight: 700; }
.nav-drop-item.active .nav-drop-ico { background: rgba(74, 92, 224, 0.16); }

@media (prefers-reduced-motion: reduce) {
  .nav-dropdown,
  .nav-drop-item { transition: opacity 0.12s linear, visibility 0s linear 0s; transform: none; }
}

/* ---------- wordmark ---------- */
.wordmark {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--topbar-text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
/* 顶栏 LOGO 图片（3D logo） */
.wordmark .logo-img {
  display: block;
  height: 32px;
  width: auto;
  border-radius: 8px;
  object-fit: contain;
}
.wordmark .mark {
  display: inline-block;
  width: 14px; height: 14px;
  border: 1px solid var(--topbar-text);
  position: relative;
}
.wordmark .mark::before {
  content: '';
  position: absolute;
  inset: 3px 2px;
  border-left: 1px solid var(--topbar-text);
  border-right: 1px solid var(--topbar-text);
}
.wordmark .slash { color: var(--topbar-text-hint); font-weight: 300; margin: 0 2px; }
.wordmark .en    { color: var(--topbar-text-muted); font-weight: 300; letter-spacing: 0.18em; }

/* ---------- 液态按钮涟漪（由 topbar.js 动态注入 .lg-ripple） ---------- */
.lg-ripple {
  position: absolute;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: radial-gradient(circle,
              rgba(255, 255, 255, 0.85) 0%,
              rgba(255, 255, 255, 0.35) 40%,
              rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  animation: lg-ripple-expand 480ms var(--lg-ease) forwards;
}
@keyframes lg-ripple-expand {
  0%   { transform: scale(0.5); opacity: 0.9; }
  60%  { opacity: 0.5; }
  100% { transform: scale(18); opacity: 0; }
}
.is-pressed { transform: scale(0.96); }

/* ---------- 顶栏右侧 ---------- */
.topbar-right {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

/* ---------- 登录按钮 ---------- */
.login-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--topbar-accent);
  padding: 8px 18px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--lg-radius-chip);
  background: rgba(255, 255, 255, 0.35);
  -webkit-backdrop-filter: blur(10px) saturate(180%);
          backdrop-filter: blur(10px) saturate(180%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--lg-dur-quick) var(--lg-ease),
    background-color var(--lg-dur-quick) var(--lg-ease),
    color var(--lg-dur-quick) var(--lg-ease),
    border-color var(--lg-dur-quick) var(--lg-ease),
    box-shadow var(--lg-dur-quick) var(--lg-ease);
}
.login-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at var(--lg-x, 50%) var(--lg-y, 50%),
              rgba(255, 255, 255, 0.6) 0%,
              rgba(255, 255, 255, 0) 50%);
  opacity: 0;
  transition: opacity 220ms var(--lg-ease);
}
.login-btn:hover::before { opacity: 1; }
.login-btn:active { transform: scale(0.97); }

.login-btn::after {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border: 1px solid var(--topbar-text-hint);
  border-radius: 50%;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}
.login-btn:hover, .login-btn:focus-visible {
  background: var(--topbar-accent);
  color: var(--topbar-text-on-accent);
  border-color: rgba(255, 255, 255, 0.6);
  outline: none;
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 6px 16px rgba(74, 92, 224, 0.3);
}
.login-btn:hover::after, .login-btn:focus-visible::after {
  background: var(--topbar-text-on-accent);
  border-color: var(--topbar-text-on-accent);
}

/* ---------- 通知按钮（消息中心入口 · 铃铛） ---------- */
.notice-btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;                    /* 显式去除 UA 默认按钮边框 */
  background: rgba(255, 255, 255, 0.4);
  -webkit-backdrop-filter: blur(10px) saturate(180%);
          backdrop-filter: blur(10px) saturate(180%);
  color: var(--topbar-text-secondary);
  cursor: pointer;
  /* 无边框设计：背景自然跟随圆角；不用 overflow 裁剪，角标需完整浮出按钮外 */
  transition:
    background-color var(--lg-dur-quick) var(--lg-ease),
    color var(--lg-dur-quick) var(--lg-ease),
    transform var(--lg-dur-quick) var(--lg-ease);
}
.notice-btn:hover {
  background: var(--topbar-accent);
  color: #fff;
  transform: translateY(-1px);
}
.notice-btn:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 2px;
}
.notice-btn:active { transform: scale(0.94); }
.notice-btn .notice-icon {
  display: inline-flex;
  width: 18px; height: 18px;
  line-height: 0;
}
.notice-btn .notice-icon svg {
  width: 100%; height: 100%;
  display: block;
}
.notice-btn .notice-badge {
  position: absolute; top: -4px; right: -4px;
  min-width: 18px; height: 18px; line-height: 18px;
  background: var(--topbar-danger); color: #fff; border-radius: 9px;
  font-size: 11px; padding: 0 5px; text-align: center; font-weight: 500;
  border: 2px solid var(--topbar-bg-elev);
}

/* ---------- 已登录态：头像 + 下拉 ---------- */
.user-state {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.user-state[hidden] { display: none !important; }

.avatar-btn {
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  border-radius: 50%;
  /* 无边框设计：裁剪职责全部交给 .avatar 单层 overflow，避免多层圆角取整错位伪影 */
  transition: transform var(--lg-dur-quick) var(--lg-ease);
}
.avatar-btn:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 2px;
}
.avatar-btn:active { transform: scale(0.95); }

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;                    /* 与 .notice-btn 36px 对齐，保持顶栏圆形控件一致 */
  height: 36px;
  border-radius: 50%;
  background: var(--topbar-bg-muted);
  color: var(--topbar-text);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  overflow: hidden;
  flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar.lg { width: 44px; height: 44px; font-size: 18px; }

/* ---------- 下拉菜单（Liquid Glass popup） ---------- */
.user-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 4px;
  min-width: 280px;
  padding: 6px;
  background: var(--topbar-bg-elev);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
          backdrop-filter: blur(36px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 18px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 20px 48px rgba(15, 23, 42, 0.18),
    0 4px 12px rgba(15, 23, 42, 0.08);
  z-index: 91;
  overflow: hidden;
  transform-origin: top right;
  animation: lg-pop-in 280ms var(--lg-ease);
}
@keyframes lg-pop-in {
  0%   { opacity: 0; transform: translateY(-6px) scale(0.96); }
  100% { opacity: 1; transform: translateY(0)    scale(1); }
}
.user-menu[hidden] { display: none !important; }
.user-menu::before { display: none; }   /* 移除旧版小三角箭头 */

.user-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 16px 14px;
  margin: 4px 4px 4px 4px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.35);
  border-bottom: 1px solid var(--topbar-border-soft);
}
.user-menu-head .head-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}
.user-menu-head .who { min-width: 0; }
.user-menu-head .name {
  font-size: 14px;
  color: var(--topbar-text);
  font-weight: 600;
  letter-spacing: 0.04em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}
.user-menu-head .acct {
  font-size: 11px;
  color: var(--topbar-text-muted);
  letter-spacing: 0.1em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}
.user-menu-head .head-asset {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border-radius: var(--lg-radius-chip);
  background: rgba(74, 92, 224, 0.08);
  border: 1px solid rgba(74, 92, 224, 0.16);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  user-select: none;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.user-menu-head .head-asset:hover {
  background: rgba(74, 92, 224, 0.16);
  border-color: rgba(74, 92, 224, 0.32);
  transform: translateY(-1px);
}
.user-menu-head .head-asset:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 1px;
}
.user-menu-head .head-asset .asset-icon {
  font-size: 13px; line-height: 1; display: inline-block; transform: translateY(1px);
}
.user-menu-head .head-asset .asset-value {
  font-size: 13px; font-weight: 600; color: var(--topbar-accent);
  letter-spacing: 0.01em; line-height: 1;
}
.user-menu-head .head-asset .asset-suffix {
  font-size: 11px; color: var(--topbar-text-muted); line-height: 1;
}

.user-menu-tags {
  padding: 12px 18px 14px;
  border-bottom: 1px solid var(--topbar-border-soft);
}
.user-menu-tags[hidden] { display: none !important; }
.user-menu-tags .umt-label {
  font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--topbar-text-muted); margin-bottom: 8px;
}
.user-menu-tags .umt-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.user-menu-tags .umt-chips .umt-chip {
  display: inline-block; padding: 2px 10px; font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; border-radius: 10px; line-height: 1.6;
}

.user-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: calc(100% - 12px);
  margin: 2px 6px;
  padding: 11px 12px;
  border-radius: 12px;
  background: transparent;
  border: 0;
  color: var(--topbar-text-secondary);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-align: left;
  cursor: pointer;
  transition:
    background-color var(--lg-dur-quick) var(--lg-ease),
    color var(--lg-dur-quick) var(--lg-ease),
    transform var(--lg-dur-quick) var(--lg-ease);
  font-family: inherit;
  text-decoration: none;
}
.user-menu-item:hover {
  background: var(--topbar-bg-soft);
  color: var(--topbar-text);
  transform: translateX(2px);
}
.user-menu-item .ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  color: var(--topbar-text-muted);
  font-size: 16px;
  line-height: 1;
}
.user-menu-item:hover .ico { color: var(--topbar-accent); }
.user-menu-item.danger { color: var(--topbar-text-muted); }
.user-menu-item.danger:hover {
  color: var(--topbar-danger);
  background: rgba(220, 38, 38, 0.08);
  transform: translateX(2px);
}
.user-menu-item.danger:hover .ico { color: var(--topbar-danger); }

.user-menu-item .menu-msg-badge {
  margin-left: auto;
  min-width: 18px; height: 18px; line-height: 18px;
  background: var(--topbar-danger); color: #fff; border-radius: 9px;
  font-size: 11px; padding: 0 6px; text-align: center; font-weight: 500;
}
.user-menu-sep {
  height: 1px; background: var(--topbar-border-soft); margin: 4px 12px;
}

/* ---------- 移动端汉堡抽屉（≤720px 显示按钮，桌面隐藏） ---------- */
.menu-btn {
  display: none; /* 桌面端由 product-nav 承担导航，按钮只在 ≤720px 出现 */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--lg-stroke-light);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
          backdrop-filter: blur(20px) saturate(180%);
  box-shadow: inset 0 1px 0.5px var(--lg-highlight-light);
  cursor: pointer;
  color: inherit;
  flex: 0 0 auto;
  transition:
    background-color 0.2s var(--lg-ease),
    border-color 0.2s var(--lg-ease),
    transform 0.2s var(--lg-ease);
}
.menu-btn:hover { background: rgba(255, 255, 255, 0.5); }
.menu-btn:active { transform: scale(0.92); }
.menu-btn:focus-visible {
  outline: 2px solid var(--topbar-accent);
  outline-offset: 2px;
}

/* 双横线，展开时 morph 成 X（行距 6.5px → 各让 3.25px 于中心交汇） */
.menu-line {
  display: block;
  width: 15px;
  height: 1.5px;
  border-radius: 1px;
  background: var(--topbar-text);
  transition:
    transform 0.28s var(--lg-ease);
}
.menu-btn.is-open .menu-line:nth-child(1) { transform: translateY(3.25px) rotate(45deg); }
.menu-btn.is-open .menu-line:nth-child(2) { transform: translateY(-3.25px) rotate(-45deg); }

/* 抽屉面板：绝对定位于 .topbar（fixed 已建立包含块）内，视觉语言与 .user-menu 一致 */
.mobile-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 16px;
  right: 16px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding: 8px;
  background: var(--topbar-bg-elev);
  -webkit-backdrop-filter: blur(36px) saturate(200%);
          backdrop-filter: blur(36px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 18px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 20px 48px rgba(15, 23, 42, 0.18),
    0 4px 12px rgba(15, 23, 42, 0.08);
  z-index: 91;
  transform-origin: top center;
  animation: lg-pop-in 280ms var(--lg-ease);
}

.mm-link {
  display: flex;
  align-items: center;
  padding: 13px 16px;
  border-radius: var(--lg-radius-chip);
  font-size: 15px;
  line-height: 1;
  color: var(--topbar-text);
  text-decoration: none;
  transition:
    background-color 0.18s var(--lg-ease),
    color 0.18s var(--lg-ease),
    transform 0.18s var(--lg-ease);
}
.mm-link:hover {
  background: rgba(74, 92, 224, 0.1);
  color: var(--topbar-accent);
  transform: translateX(2px);
}
.mm-link:active { transform: scale(0.98); }
.mm-link.active {
  color: var(--topbar-accent);
  background: rgba(74, 92, 224, 0.12);
  font-weight: 600;
}
/* 抽屉内二级链接：「IQ 俱乐部」下挂的 4 项，图标 + 缩进 + 右侧阈值 */
.mm-subsep {
  height: 1px;
  margin: 6px 16px 6px 24px;
  background: var(--lg-menu-sep);
}
.mm-sublink {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px 9px 24px;
  border-radius: var(--lg-radius-chip);
  font-size: 13.5px;
  line-height: 1;
  color: var(--topbar-text-muted);
  text-decoration: none;
  transition:
    background-color 0.18s var(--lg-ease),
    color 0.18s var(--lg-ease),
    transform 0.18s var(--lg-ease);
}
.mm-sublink .nav-drop-ico {
  width: 24px;
  height: 24px;
  border-radius: 8px;
}
.mm-sublink .nav-drop-ico svg { width: 13px; height: 13px; }
.mm-sub-label { flex: 1 1 auto; }
.mm-sub-tag {
  flex: none;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--topbar-text-hint);
}
.mm-sublink:hover {
  background: rgba(74, 92, 224, 0.08);
  color: var(--topbar-accent);
  transform: translateX(2px);
}
.mm-sublink:active { transform: scale(0.98); }
.mm-sublink.active {
  color: var(--topbar-accent);
  background: rgba(74, 92, 224, 0.10);
  font-weight: 600;
}
.mm-sublink.active::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 2.5px;
  height: 16px;
  border-radius: 2px;
  background: var(--topbar-accent);
}

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .topbar { top: 0; left: 0; right: 0; padding: 10px 16px; }
  .product-nav { display: none; }
  .menu-btn { display: flex; }
  .topbar-right { gap: 8px; }
  .login-btn { padding: 7px 14px; font-size: 11px; letter-spacing: 0.14em; }
  .login-btn::after { display: none; }
  .user-menu { min-width: 220px; right: -4px; }
}

/* ---------- 返回链接（游戏页面使用，沿用既有） ---------- */
.back-link-wrapper {
  padding: 8px 40px 0;
  background: var(--topbar-bg);
}
.back-link {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--topbar-text-muted);
  display: inline-block;
  margin-bottom: 8px;
}
.back-link:hover { color: var(--topbar-accent); }
@media (max-width: 720px) {
  .back-link-wrapper { padding: 8px 24px 0; }
}

/* ============================================================
   兼容性与无障碍兜底
   ============================================================ */

/* 1) 老浏览器（不支持 backdrop-filter）：降级为近不透明 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .topbar,
  .topbar--dark {
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  }
  .user-menu {
    background: #ffffff;
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
  }
  .nav-item, .login-btn, .notice-btn, .avatar-btn {
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
  }
}
@media (prefers-color-scheme: dark) {
  @supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    :root:not(.topbar--light) .topbar,
    .topbar--dark {
      background: rgba(10, 14, 39, 0.96);
    }
  }
}

/* 2) 系统级降透明度偏好（无障碍） */
@media (prefers-reduced-transparency: reduce) {
  .topbar,
  .topbar--dark,
  .nav-item,
  .user-menu,
  .mobile-menu,
  .login-btn,
  .menu-btn,
  .notice-btn {
    background: var(--topbar-bg-elev);
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
    transition: none;
  }
}

/* 3) 系统级降动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .topbar,
  .topbar--bounce,
  .nav-item,
  .login-btn,
  .notice-btn,
  .avatar-btn,
  .user-menu,
  .user-menu-item,
  .menu-btn,
  .menu-line,
  .mobile-menu,
  .mm-link {
    transition: none !important;
    animation: none !important;
  }
}

/* ===== 设置弹窗（顶栏"设置"菜单唤起；UI 占位：仅承载退出登录） =====
   视觉与「我的资产」弹窗（.profile-modal-overlay/.profile-modal-dialog）保持一致：
   - 遮罩浓度/模糊、卡片实色背景 + 实色边框、统一阴影值
   - 标题字号 15px / 字距 0.08em；头部内边距 18px 22px 16px
   - 关闭按钮 8px 圆角；入场动画位移 20px + scale(0.98) → 1
   - 暗色适配：dark 模式下复用页面主题变量（与「我的资产」一致）
*/
.topbar-settings-modal[hidden] { display: none; }

.topbar-settings-modal .modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: tsm-fade 0.18s ease both;
}

.topbar-settings-modal .modal-card {
  width: min(420px, 94vw);
  max-height: min(92vh, 900px);
  background: var(--bg-card, #ffffff);
  color: var(--text-primary, #0f172a);
  border-radius: 16px;
  border: 1px solid var(--border-soft, #e5e7eb);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
  font-family: inherit;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: tsm-pop 0.22s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.topbar-settings-modal .modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 16px;
  border-bottom: 1px solid var(--border-soft, #e5e7eb);
  flex-shrink: 0;
}

.topbar-settings-modal .modal-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-primary, #0f172a);
}

.topbar-settings-modal .modal-close {
  width: 32px;
  height: 32px;
  border: 0;
  background: transparent;
  border-radius: 8px;
  color: var(--text-muted, #64748b);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  font-family: inherit;
}
.topbar-settings-modal .modal-close:hover {
  background: var(--bg-soft, #f1f5f9);
  color: var(--text-primary, #0f172a);
}
.topbar-settings-modal .modal-close:focus-visible {
  outline: 2px solid var(--topbar-accent, #6366f1);
  outline-offset: 2px;
}

.topbar-settings-modal .modal-body {
  padding: 20px 22px 24px;
  color: var(--text-secondary, #475569);
  font-size: 13px;
  line-height: 1.6;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}
/* ---- 分组骨架（阶段 0）：账号安全 / 关于 ---- */
.topbar-settings-modal .settings-group { margin: 0 0 18px; }
.topbar-settings-modal .settings-group:last-child { margin-bottom: 0; }

.topbar-settings-modal .settings-group-title {
  margin: 0 0 6px;
  padding: 0 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-muted, #64748b);
}

.topbar-settings-modal .settings-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.topbar-settings-modal .settings-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text-primary, #0f172a);
  font-size: 13px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.topbar-settings-modal .settings-item:hover { background: var(--bg-soft, #f1f5f9); }
.topbar-settings-modal .settings-item:focus-visible {
  outline: 2px solid var(--topbar-accent, #6366f1);
  outline-offset: 2px;
}
.topbar-settings-modal .settings-item .ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
}

.topbar-settings-modal .settings-item-hint {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
  flex-shrink: 0;
}

/* 「关于」组真实链接（协议/隐私）：锚点样式与按钮条目对齐 */
.topbar-settings-modal a.settings-item {
  text-decoration: none;
  color: var(--text-primary, #0f172a);
}
.topbar-settings-modal a.settings-item:visited { color: var(--text-primary, #0f172a); }

/* 纯展示条目（版本号）：不可点、无 hover 反馈 */
.topbar-settings-modal .settings-item-static { cursor: default; }
.topbar-settings-modal .settings-item-static:hover { background: transparent; }

/* 占位条目：灰显不可点，后续阶段挂功能时移除 is-pending + disabled */
.topbar-settings-modal .settings-item.is-pending {
  color: var(--text-muted, #94a3b8);
  cursor: not-allowed;
}
.topbar-settings-modal .settings-item.is-pending:hover { background: transparent; }
.topbar-settings-modal .settings-item.is-pending .ico { opacity: 0.55; }

.topbar-settings-modal .modal-foot {
  padding: 12px 22px 18px;
  border-top: 1px solid var(--border-soft, #e5e7eb);
  flex-shrink: 0;
}

.topbar-settings-modal .modal-logout-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--text-muted, #6b7280);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.04em;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.topbar-settings-modal .modal-logout-btn:hover {
  background: rgba(220, 38, 38, 0.08);
  color: var(--topbar-danger, #dc2626);
  transform: translateX(2px);
}
.topbar-settings-modal .modal-logout-btn:focus-visible {
  outline: 2px solid var(--topbar-danger, #dc2626);
  outline-offset: 2px;
}
.topbar-settings-modal .modal-logout-btn .ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: 16px;
  line-height: 1;
}

/* ---- 分组骨架（阶段 0）：底部危险区（退出登录 / 注销账号占位） ---- */
.topbar-settings-modal .settings-danger-zone {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* 占位的危险操作：灰显不可点；启用后走上方红色 hover 交互 */
.topbar-settings-modal .modal-logout-btn.is-pending {
  color: var(--text-muted, #94a3b8);
  cursor: not-allowed;
}
.topbar-settings-modal .modal-logout-btn.is-pending:hover {
  background: transparent;
  color: var(--text-muted, #94a3b8);
  transform: none;
}
.topbar-settings-modal .modal-logout-btn.is-pending .ico { opacity: 0.55; }

@keyframes tsm-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes tsm-pop {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)   scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .topbar-settings-modal .modal-mask,
  .topbar-settings-modal .modal-card,
  .topbar-settings-modal .modal-close,
  .topbar-settings-modal .modal-logout-btn,
  .topbar-settings-modal .settings-item {
    animation: none !important;
    transition: none !important;
  }
}

@media (prefers-color-scheme: dark) {
  .topbar-settings-modal .modal-card {
    background: var(--bg-card, #131a2e);
    color: var(--text-primary, #f1f5f9);
    border-color: var(--border-soft, #1f2a44);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }
  .topbar-settings-modal .modal-title {
    color: var(--text-primary, #f1f5f9);
  }
  .topbar-settings-modal .modal-close {
    color: var(--text-muted, #94a3b8);
  }
  .topbar-settings-modal .modal-close:hover {
    background: var(--bg-soft, #1e293b);
    color: var(--text-primary, #f1f5f9);
  }
  .topbar-settings-modal .modal-head,
  .topbar-settings-modal .modal-foot {
    border-color: var(--border-soft, #1f2a44);
  }
}

/* ---- 修改密码弹层（P0 合规阶段 2）：复用设置弹窗骨架，叠层更高 ---- */
.topbar-password-modal[hidden] { display: none; }

/* 设置弹窗 mask 为 9999，改密弹层盖其上 */
.topbar-password-modal .modal-mask { z-index: 10000; }

.topbar-password-modal .pw-form {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

.topbar-password-modal .pw-form-tip {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted, #64748b);
  line-height: 1.6;
}

.topbar-password-modal .pw-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.topbar-password-modal .pw-field__label {
  font-size: 12px;
  color: var(--text-secondary, #475569);
  letter-spacing: 0.04em;
}

.topbar-password-modal .pw-field__input {
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--border-soft, #e5e7eb);
  border-radius: 10px;
  background: var(--bg-soft, #f8fafc);
  color: var(--text-primary, #0f172a);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.topbar-password-modal .pw-field__input:focus {
  outline: none;
  border-color: var(--topbar-accent, #6366f1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  background: var(--bg-card, #ffffff);
}

.topbar-password-modal .pw-field__hint {
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
}

.topbar-password-modal .pw-form__error {
  margin: 0;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #dc2626;
  font-size: 12px;
  line-height: 1.6;
}
.topbar-password-modal .pw-form__error[hidden] { display: none; }

.topbar-password-modal .pw-form__actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 2px;
}

.topbar-password-modal .pw-btn {
  height: 36px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}
.topbar-password-modal .pw-btn.is-primary {
  background: var(--topbar-accent, #6366f1);
  color: #ffffff;
}
.topbar-password-modal .pw-btn.is-primary:hover:not(:disabled) {
  filter: brightness(1.08);
}
.topbar-password-modal .pw-btn.is-primary:focus-visible {
  outline: 2px solid var(--topbar-accent, #6366f1);
  outline-offset: 2px;
}
.topbar-password-modal .pw-btn.is-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.topbar-password-modal .pw-btn.is-ghost {
  background: transparent;
  border-color: var(--border-soft, #e5e7eb);
  color: var(--text-secondary, #475569);
}
.topbar-password-modal .pw-btn.is-ghost:hover {
  background: var(--bg-soft, #f1f5f9);
  color: var(--text-primary, #0f172a);
}

@media (prefers-reduced-motion: reduce) {
  .topbar-password-modal .pw-btn,
  .topbar-password-modal .pw-field__input {
    transition: none !important;
  }
}

@media (prefers-color-scheme: dark) {
  .topbar-password-modal .pw-form-tip {
    color: var(--text-muted, #94a3b8);
  }
  .topbar-password-modal .pw-field__label {
    color: var(--text-secondary, #94a3b8);
  }
  .topbar-password-modal .pw-field__input {
    background: var(--bg-soft, #1e293b);
    border-color: var(--border-soft, #1f2a44);
    color: var(--text-primary, #f1f5f9);
  }
  .topbar-password-modal .pw-field__input:focus {
    background: var(--bg-card, #131a2e);
  }
  .topbar-password-modal .pw-btn.is-ghost {
    border-color: var(--border-soft, #1f2a44);
    color: var(--text-secondary, #94a3b8);
  }
  .topbar-password-modal .pw-btn.is-ghost:hover {
    background: var(--bg-soft, #1e293b);
    color: var(--text-primary, #f1f5f9);
  }
}

/* ---- 注销账号弹层（P0 合规阶段 3）----
   复用 .topbar-password-modal 样式族（mask/card/head/close/form/field/input/hint/error/actions/btn），
   叠层级与改密弹层同档（z-index:10000）；Esc 优先级最高（topbar.14319d4e.js Esc handler）。
   独有：合规教育警告块 + danger 主色按钮 + 注销/退出按钮视觉区分。 */
.topbar-deletion-modal[hidden] { display: none; }

.topbar-deletion-modal .modal-mask { z-index: 10000; }

.topbar-deletion-modal .pw-form {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

/* 危险操作入口（设置弹窗底部）：删除按钮与退出登录视觉区分（红描边 + hover 红淡背景） */
.settings-danger-zone .modal-logout-btn {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary, #94a3b8);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-start;
  font-family: inherit;
  transition: background .18s, border-color .18s, color .18s;
}
.settings-danger-zone .modal-logout-btn:hover {
  background: var(--bg-soft, #1e293b);
  color: var(--text-primary, #f1f5f9);
}
.settings-danger-zone .modal-deletion-btn {
  margin-top: 6px;
  border-color: var(--border-soft, #1f2a44);
  color: var(--danger, #f87171);
}
.settings-danger-zone .modal-deletion-btn:hover {
  background: rgba(248, 113, 113, 0.08);
  border-color: var(--danger, #f87171);
  color: var(--danger, #f87171);
}
.settings-danger-zone .modal-deletion-btn .ico { font-size: 14px; }

/* 合规教育警告块：明确告知"30 天可撤回 / 撤回期满永久删除" */
.topbar-deletion-modal .del-warning {
  margin: 0;
  padding: 10px 12px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.28);
  border-radius: 8px;
  color: var(--danger, #f87171);
}
.topbar-deletion-modal .del-warning-title {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.topbar-deletion-modal .del-warning-body {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
}
.topbar-deletion-modal .del-warning-body strong {
  color: var(--danger, #f87171);
  font-weight: 700;
}

/* 范围说明：注销范围 / 保留范围 / 社区内容保留 */
.topbar-deletion-modal .del-scope-list {
  margin: 0;
  padding: 12px 14px 12px 30px;
  background: var(--bg-soft, rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border-soft, rgba(255, 255, 255, 0.08));
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-secondary, #94a3b8);
  list-style: disc;
}
.topbar-deletion-modal .del-scope-list li {
  padding: 0;
  margin: 0;
}
.topbar-deletion-modal .del-scope-list strong {
  color: var(--text-primary, #e8eaf0);
  font-weight: 600;
}

/* 危险按钮：主色用红，与改密弹层蓝紫区分 */
.topbar-deletion-modal .pw-btn.pw-btn-danger {
  background: var(--danger, #ef4444);
  border-color: var(--danger, #ef4444);
  color: #fff;
}
.topbar-deletion-modal .pw-btn.pw-btn-danger:hover:not(:disabled) {
  background: #dc2626;
  border-color: #dc2626;
}
.topbar-deletion-modal .pw-btn.pw-btn-danger:focus-visible {
  outline: 2px solid rgba(239, 68, 68, 0.4);
  outline-offset: 2px;
}
.topbar-deletion-modal .pw-btn.pw-btn-danger:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  .topbar-deletion-modal .modal-mask,
  .topbar-deletion-modal .pw-btn {
    transition: none;
  }
}

/* 深色主题适配 */
@media (prefers-color-scheme: dark) {
  .topbar-deletion-modal .del-warning {
    background: rgba(248, 113, 113, 0.10);
    border-color: rgba(248, 113, 113, 0.35);
  }
  .topbar-deletion-modal .del-scope-list {
    background: rgba(0, 0, 0, 0.18);
  }
}

/* ============================================================
   收货地址弹层（设置扩展 Phase B）
   - 列表弹层 .topbar-address-modal：复用 settings 样式族（mask/card/head/close）
   - 编辑弹层 .topbar-address-edit-modal：挂 .topbar-password-modal 复用表单族
     （pw-form/pw-field/pw-btn/pw-form__error），此处只补 grid / checkbox / 卡片样式
   ============================================================ */
.topbar-address-modal[hidden],
.topbar-address-edit-modal[hidden] { display: none; }

.topbar-address-modal .modal-mask { z-index: 10000; }
.topbar-address-modal .modal-card { width: min(560px, 94vw); }

.topbar-address-edit-modal .modal-mask { z-index: 10100; }
.topbar-address-edit-modal .modal-card { width: min(520px, 94vw); }

/* ---- 列表弹层：地址卡片 ---- */
.topbar-address-modal .addr-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.topbar-address-modal .addr-item {
  border: 1px solid var(--border-soft, #e5e7eb);
  border-radius: 10px;
  padding: 10px 12px;
}
.topbar-address-modal .addr-item-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.topbar-address-modal .addr-item-name {
  font-weight: 600;
  color: var(--text-primary, #0f172a);
}
.topbar-address-modal .addr-item-phone {
  color: var(--text-muted, #64748b);
  font-size: 12px;
}
.topbar-address-modal .addr-item-tag {
  font-size: 11px;
  line-height: 1;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.12);
  color: var(--topbar-accent, #6366f1);
  border: 1px solid rgba(99, 102, 241, 0.35);
}
.topbar-address-modal .addr-item-body {
  margin-top: 4px;
  color: var(--text-secondary, #475569);
  word-break: break-all;
}
.topbar-address-modal .addr-item-ops {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.topbar-address-modal .addr-op-btn {
  border: 1px solid var(--border-soft, #e5e7eb);
  background: transparent;
  color: var(--text-secondary, #475569);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s ease;
}
.topbar-address-modal .addr-op-btn:hover:not(:disabled) {
  border-color: var(--topbar-accent, #6366f1);
  color: var(--topbar-accent, #6366f1);
}
.topbar-address-modal .addr-op-btn:focus-visible {
  outline: 2px solid var(--topbar-accent, #6366f1);
  outline-offset: 2px;
}
.topbar-address-modal .addr-op-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.topbar-address-modal .addr-op-btn.is-danger:hover:not(:disabled) {
  border-color: var(--topbar-danger, #ef4444);
  color: var(--topbar-danger, #ef4444);
}
.topbar-address-modal .addr-empty {
  padding: 26px 0;
  text-align: center;
  color: var(--text-muted, #64748b);
  font-size: 13px;
}

/* ---- 列表弹层：底部操作行 ---- */
.topbar-address-modal .addr-list-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.topbar-address-modal .addr-add-btn {
  padding: 8px 16px;
  font-size: 13px;
}
.topbar-address-modal .addr-list-hint {
  color: var(--text-muted, #64748b);
  font-size: 12px;
}
.topbar-address-modal .addr-op-feedback {
  font-size: 12px;
  color: #16a34a;
  flex: 1;
  text-align: right;
  min-width: 0;
}
.topbar-address-modal .addr-op-feedback.is-err {
  color: var(--topbar-danger, #ef4444);
}

/* ---- 编辑弹层：表单补充（其余复用 pw-form 族） ---- */
.topbar-address-edit-modal .addr-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}
.topbar-address-edit-modal .addr-detail-input {
  resize: vertical;
  min-height: 56px;
  font-family: inherit;
}
.topbar-address-edit-modal .addr-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 2px 0 4px;
  font-size: 13px;
  color: var(--text-secondary, #475569);
  cursor: pointer;
}
.topbar-address-edit-modal .addr-check-row input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--topbar-accent, #6366f1);
  cursor: pointer;
}

/* 移动端：编辑表单单列 */
@media (max-width: 480px) {
  .topbar-address-edit-modal .addr-form-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  .topbar-address-modal .addr-op-btn {
    transition: none;
  }
}

/* ---- 消息提醒开关（P4 阶段 A）----
   「设置 → 通用 → 消息提醒」行内 toggle；复用 settings-item flex 布局，
   toggle 贴右（label 触发 checkbox）；hint 行内反馈 2.5s 自动清。 */
.settings-row-hint {
  display: block;
  margin: -6px 12px 6px;
  padding: 0 0 0 30px;            /* 对齐 settings-item-label 缩进 */
  font-size: 11px;
  line-height: 1.4;
  color: var(--topbar-accent, #16a34a);
  word-break: break-all;
}
.settings-row-hint.is-err { color: var(--topbar-danger, #ef4444); }

/* 整行不可点（避免与 toggle label 点击冲突）：保留 hover 反馈禁用 */
.settings-item-static:has(.pw-toggle) { cursor: default; }
.settings-item-static:has(.pw-toggle):hover { background: transparent; }

/* toggle：复用与改密弹层一致的简洁形态 */
.pw-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 36px;
  height: 20px;
  margin-left: auto;
  flex-shrink: 0;
  cursor: pointer;
}
.pw-toggle input[type="checkbox"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}
.pw-toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-soft, #cbd5e1);
  border-radius: 999px;
  transition: background-color 0.15s ease;
}
.pw-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
  transition: transform 0.15s ease;
}
.pw-toggle input:checked ~ .pw-toggle-track {
  background: var(--topbar-accent, #6366f1);
}
.pw-toggle input:checked ~ .pw-toggle-track .pw-toggle-thumb {
  transform: translateX(16px);
}
.pw-toggle input:focus-visible ~ .pw-toggle-track {
  outline: 2px solid var(--topbar-accent, #6366f1);
  outline-offset: 2px;
}
.pw-toggle input:disabled ~ .pw-toggle-track {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (prefers-reduced-motion: reduce) {
  .pw-toggle-track,
  .pw-toggle-thumb { transition: none; }
}