/* ============================================================
   Vineyard TOEFL+ · 全站统一导航样式 (nav.css)
   字面色值 + nav.nav 提升优先级，确保所有页面导航完全一致。
   ============================================================ */
nav.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(245, 242, 252, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(74, 56, 212, 0.08);
  padding: 14px 48px;
  display: flex; align-items: center; gap: 20px;
}
nav.nav:not([data-vy="1"]) {
  min-height: 67px;
}
nav.nav .brand-logo {
  width: 40px; height: 40px; flex-shrink: 0;
  display: block; border-radius: 50%;
  user-select: none; -webkit-user-drag: none;
}
nav.nav .brand-en {
  font-family: 'Fraunces','Noto Serif SC','Source Han Serif SC','Songti SC',Georgia,serif;
  font-size: 22px; font-weight: 500; letter-spacing: -0.01em;
  line-height: 1.1; color: #1A1A2E; cursor: pointer;
}
nav.nav .brand-en a { color: inherit; text-decoration: none; }
nav.nav .brand-en em { font-style: italic; color: #4A38D4; }
nav.nav .brand-sep { width: 1px; height: 24px; background: rgba(74, 56, 212, 0.25); }
nav.nav .brand-zh {
  font-family: 'Microsoft YaHei','微软雅黑','PingFang SC','Hiragino Sans GB',sans-serif;
  font-size: 15px; line-height: 1.35; color: #3A3A4E; font-weight: 600; letter-spacing: 0.02em;
}
nav.nav .nav-tabs {
  margin-left: auto; display: flex; align-items: center; gap: 6px;
  width: 529px; min-width: 529px; max-width: 529px;
}
nav.nav .nav-tab {
  font-family: 'Manrope',-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size: 13px; letter-spacing: 0.02em; color: #3A3A4E;
  line-height: 17px; padding: 8px 14px; border-radius: 999px; cursor: pointer;
  transition: all .2s; text-decoration: none; background: transparent;
}
nav.nav .nav-tab:hover { background: rgba(74, 56, 212, 0.08); color: #4A38D4; }
nav.nav .nav-tab.active { background: #4A38D4; color: #fff; }

nav.nav .nav-item { position: relative; display: inline-flex; align-items: center; }
nav.nav .nav-caret {
  font-size: 9px; margin-left: 3px; opacity: 0.55; display: inline-block;
  transform: translateY(-1px); transition: transform .2s;
}
nav.nav .nav-item:hover .nav-caret { transform: translateY(-1px) rotate(180deg); }
nav.nav .nav-dropdown {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(74, 56, 212, 0.12); border-radius: 14px;
  padding: 8px; min-width: 250px;
  box-shadow: 0 12px 36px -8px rgba(74, 56, 212, 0.22), 0 4px 12px rgba(26, 26, 46, 0.06);
  opacity: 0; visibility: hidden;
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  z-index: 1000; margin-top: 6px;
}
nav.nav .nav-dropdown::before {
  content: ''; position: absolute; top: -10px; left: 0; right: 0; height: 12px; background: transparent;
}
nav.nav .nav-item:hover .nav-dropdown,
nav.nav .nav-item:focus-within .nav-dropdown {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
nav.nav .nav-dd-item {
  display: grid; grid-template-columns: 74px 1fr; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 10px; text-decoration: none; color: #3A3A4E;
  font-family: 'Manrope',-apple-system,'PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  transition: background .15s, color .15s; position: relative;
}
nav.nav .nav-dd-item:hover { background: #E8E5FB; color: #4A38D4; }
nav.nav .nav-dd-item .dd-zh {
  font-family: 'Microsoft YaHei','微软雅黑','PingFang SC','Hiragino Sans GB',sans-serif;
  font-size: 14px; font-weight: 500; white-space: nowrap;
}
nav.nav .nav-dd-item .dd-en {
  font-size: 11px; color: #9A95A8; letter-spacing: 0.02em; font-style: italic;
  font-family: 'Fraunces','Noto Serif SC','Songti SC',Georgia,serif; text-align: left;
}
nav.nav .nav-dd-item:hover .dd-en { color: #4A38D4; opacity: 0.75; }

nav.nav .user-pill {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 14px 6px 6px; background: rgba(255,255,255,0.55);
  border: 1px solid rgba(74, 56, 212, 0.12); border-radius: 999px;
  font-family: 'Manrope',-apple-system,'PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size: 13px; line-height: 17px; color: #3A3A4E; margin-left: 12px;
  width: 177px; min-width: 177px; height: 38px; box-sizing: border-box;
  overflow: visible;
}
nav.nav .user-pill:empty::before {
  content: '';
  width: 26px; height: 26px; border-radius: 50%;
  background: #F4F2FE;
  border: 1px solid rgba(74, 56, 212, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.72);
  flex: 0 0 26px;
}
nav.nav .user-pill:empty::after {
  content: '';
  width: 102px; height: 12px; border-radius: 999px;
  background: rgba(74, 56, 212, 0.08);
  flex: 0 0 102px;
}
nav.nav .user-pill.guest { justify-content: flex-start; }
nav.nav .user-avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: #F4F2FE; color: #4A38D4;
  border: 1px solid rgba(74, 56, 212, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.72);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 12px;
}
nav.nav .logout-btn {
  background: transparent; border: none; color: #9A95A8; font-size: 11px;
  line-height: 15px; cursor: pointer; padding: 2px 4px; letter-spacing: 0.06em;
}
nav.nav .logout-btn:hover { color: #D04545; }
nav.nav .vy-login-pill {
  font-family: 'Manrope',-apple-system,'PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  background: #4A38D4; color: #fff; border: none; border-radius: 999px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  padding: 8px 18px; cursor: pointer; transition: background .2s;
}
nav.nav .vy-login-pill:hover { background: #2E1F9E; }

@media (max-width: 860px) {
  nav.nav { padding: 12px 18px; gap: 12px; display: flex; flex-wrap: wrap; }
  nav.nav .brand-zh, nav.nav .brand-sep { display: none; }
  nav.nav .brand-logo, nav.nav .brand-en { order: 1; }
  nav.nav .nav-tabs {
    width: 100%; min-width: 0; max-width: none;
    order: 2; overflow-x: auto; margin-left: 0;
  }
  nav.nav .user-pill {
    order: 3;
    margin-left: 0;
    align-self: flex-start;
  }
  nav.nav .user-menu-popover { left: 0; right: auto; }
  nav.nav .nav-caret { display: none; }
  nav.nav .nav-dropdown { display: none; }
}

/* 防止中文导航项竖排/折行（flex 收缩时 CJK 会按单字断行） */
nav.nav .brand-en,
nav.nav .brand-zh,
nav.nav .nav-tab,
nav.nav .user-pill,
nav.nav .user-pill span,
nav.nav .logout-btn,
nav.nav .vy-login-pill { white-space: nowrap; }
nav.nav .brand-logo,
nav.nav .brand-en,
nav.nav .brand-zh,
nav.nav .nav-tabs,
nav.nav .nav-tab,
nav.nav .user-pill { flex-shrink: 0; }

/* 紧凑化间距：确保账户胶囊与所有项在同一行（窗口约 ≥1060px 时单行） */
nav.nav { padding: 13px 28px; gap: 12px; }
nav.nav .brand-en { font-size: 20px; }
nav.nav .brand-zh { font-size: 14px; }
nav.nav .nav-tabs { gap: 4px; }
nav.nav .nav-tab { padding: 7px 11px; }
nav.nav .user-pill { margin-left: 6px; padding: 5px 13px 5px 5px; }

/* 账户胶囊：头像+名字可点击进入「我的」 */
nav.nav .user-pill-link{display:grid;grid-template-columns:26px 8ch 10px;align-items:center;column-gap:8px;text-decoration:none;color:inherit;cursor:pointer;border-radius:999px;transition:opacity .15s;white-space:nowrap}
nav.nav .user-pill-link:hover{opacity:.78}
nav.nav .user-pill-link #user-name{display:block;width:8ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
nav.nav .user-menu{position:relative}
nav.nav .user-caret{font-size:9px;color:#9A95A8;transform:translateY(-1px);transition:transform .18s;text-align:center}
nav.nav .user-menu:hover .user-caret,
nav.nav .user-menu:focus-within .user-caret{transform:translateY(-1px) rotate(180deg)}
nav.nav .user-menu-popover{
  position:absolute;right:-8px;top:100%;margin-top:8px;min-width:132px;
  background:rgba(255,255,255,0.98);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(74,56,212,0.12);border-radius:14px;padding:7px;
  box-shadow:0 12px 36px -8px rgba(74,56,212,0.22),0 4px 12px rgba(26,26,46,0.06);
  opacity:0;visibility:hidden;transform:translateY(4px);transition:opacity .18s ease,transform .18s ease,visibility .18s;z-index:1000;
}
nav.nav .user-menu-popover::before{content:'';position:absolute;top:-10px;left:0;right:0;height:12px;background:transparent}
nav.nav .user-menu:hover .user-menu-popover,
nav.nav .user-menu:focus-within .user-menu-popover{opacity:1;visibility:visible;transform:translateY(0)}
nav.nav .user-menu-item{
  display:block;width:100%;border:0;background:transparent;text-align:left;text-decoration:none;cursor:pointer;
  color:#3A3A4E;border-radius:10px;padding:9px 11px;
  font-family:'Microsoft YaHei','微软雅黑','PingFang SC','Hiragino Sans GB',sans-serif;
  font-size:13px;line-height:1.2;white-space:nowrap;
}
nav.nav .user-menu-item:hover{background:#E8E5FB;color:#4A38D4}
nav.nav .user-menu-item.danger{color:#9A95A8}
nav.nav .user-menu-item.danger:hover{background:rgba(208,69,69,0.08);color:#D04545}

/* 移动端导航保持单行横向滚动，避免点击“写作/口语”后被页面内旧样式挤到下一行。 */
@media (max-width: 860px) {
  nav.nav .nav-tabs {
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: center;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  nav.nav .nav-tabs::-webkit-scrollbar { display: none; }
  nav.nav .nav-item,
  nav.nav .nav-tab {
    flex: 0 0 auto !important;
  }
  nav.nav .nav-tab {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}