/* ============================================================
   Nika 官网落地页 — 沿用后台主题变量（theme-neural.css）
   仅新增布局类，配色/玻璃/辉光全部复用同一套 token
   ============================================================ */
html { scroll-behavior: smooth; }
body.site { overflow-x: hidden; }
.site-main { position: relative; z-index: 1; }
.site-wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* 语言切换器 */
.i18n-switcher {
  background: rgba(8, 14, 30, 0.6); color: var(--text);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 7px 10px; font-size: 13px; font-family: inherit; cursor: pointer;
}
.i18n-switcher:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,.15); }

/* ---------- 顶栏（呼应后台 .top-bar 的毛玻璃） ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 16, 34, 0.55);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(34, 211, 238, 0.06);
}
.site-nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; gap: 20px;
}
.site-logo {
  font-size: 22px; font-weight: 800; letter-spacing: .5px; text-decoration: none;
  background: linear-gradient(90deg, #22d3ee, #7dd3fc 60%, #a78bfa);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.site-logo small { font-size: 12px; font-weight: 500; margin-left: 8px; -webkit-text-fill-color: var(--muted); }
.site-links { display: flex; gap: 4px; margin-left: 8px; }
.site-links a {
  color: var(--text-secondary); text-decoration: none; font-size: 14px;
  padding: 8px 14px; border-radius: var(--radius-sm); transition: all var(--transition);
}
.site-links a:hover { color: #eafdff; background: var(--sidebar-hover); }
.site-actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.site-burger {
  display: none; background: transparent; border: 1px solid var(--line-strong);
  color: var(--text); font-size: 18px; line-height: 1; padding: 8px 12px; border-radius: var(--radius-sm); cursor: pointer;
}
@media (max-width: 860px) {
  .site-links {
    position: absolute; top: 64px; left: 0; right: 0; flex-direction: column;
    background: rgba(8, 12, 28, 0.96); border-bottom: 1px solid var(--line);
    padding: 10px 16px; display: none; gap: 2px;
  }
  .site-links.open { display: flex; }
  .site-burger { display: block; margin-left: 0; }
  .site-actions { margin-left: 0; }
  .site-actions .btn { display: none; }
  .site-actions #consoleEntry { display: inline-block; }
  .site-actions #lang-switch { display: inline-block; }
}

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head h2 {
  font-size: 34px; margin: 0 0 12px; font-weight: 800;
  background: linear-gradient(90deg, #e6edff, #9fd8ff);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.section-head p { color: var(--text-secondary); margin: 0; font-size: 16px; }
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid rgba(34, 211, 238, 0.28); border-radius: 999px; padding: 5px 14px; margin-bottom: 16px;
}
@media (max-width: 640px) { .section { padding: 64px 0; } .section-head h2 { font-size: 26px; } }

/* ---------- Hero ---------- */
.hero { padding: 84px 0 72px; position: relative; }
.hero-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}
.hero h1 { font-size: 52px; line-height: 1.12; margin: 0 0 20px; font-weight: 800; color: var(--text); }
.hero h1 .grad {
  background: linear-gradient(90deg, #22d3ee, #7dd3fc 55%, #a78bfa);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
/* 首屏轮播左侧大字：优先微软雅黑 */
.hero-carousel .hero h1,
.hero-carousel .hc-overlay-inner h2 {
  font-family: "Microsoft YaHei", "微软雅黑", "MS YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", sans-serif;
}
.hero-sub { color: var(--text-secondary); font-size: 17px; line-height: 1.75; margin: 0 0 30px; max-width: 560px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 13px; }
.hero-points span { display: inline-flex; align-items: center; gap: 7px; }
.hero-points i { color: var(--success); font-style: normal; font-weight: 700; }

.btn-lg { padding: 14px 28px; font-size: 15px; border-radius: var(--radius-md); text-decoration: none; display: inline-block; }
a.btn { text-decoration: none; display: inline-block; }

/* Hero 右侧：纯 CSS 产品 mock */
.hero-visual { position: relative; }
.mock {
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 44px rgba(34, 211, 238, 0.10);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  overflow: hidden;
}
.mock-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.mock-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(120,150,210,.35); }
.mock-dot.o { background: #ff8a3c; } .mock-dot.g { background: #34d399; } .mock-dot.c { background: #22d3ee; }
.mock-title { margin-left: 8px; font-size: 12px; color: var(--muted); }
.mock-body { padding: 16px; display: grid; gap: 10px; }
.mock-row {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  background: rgba(20, 30, 58, 0.5); border: 1px solid var(--line); border-radius: var(--radius-md);
}
.mock-avatar {
  width: 34px; height: 34px; border-radius: 10px; flex: 0 0 auto;
  background: linear-gradient(135deg, #22d3ee, #6366f1);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.35);
}
.mock-avatar.o { background: linear-gradient(135deg, #ff8a3c, #fb7185); box-shadow: 0 0 14px rgba(255,138,60,.35); }
.mock-avatar.v { background: linear-gradient(135deg, #a78bfa, #38bdf8); box-shadow: 0 0 14px rgba(167,139,250,.35); }
.mock-info { flex: 1; min-width: 0; }
.mock-info b { display: block; font-size: 13px; color: #eafdff; font-weight: 600; }
.mock-info span { font-size: 11px; color: var(--muted); }
.mock-tag { font-size: 11px; padding: 4px 10px; border-radius: 999px; border: 1px solid transparent; white-space: nowrap; }
.mock-tag.run { color: #34d399; background: var(--success-soft); border-color: rgba(52,211,153,.35); }
.mock-tag.wait { color: #fbbf24; background: var(--warning-soft); border-color: rgba(251,191,36,.35); }
.mock-tag.done { color: #22d3ee; background: var(--accent-soft); border-color: rgba(34,211,238,.35); }
.mock-float {
  position: absolute; right: -10px; bottom: -18px; width: 200px;
  background: rgba(12,20,40,.9); border: 1px solid var(--line-strong); border-radius: var(--radius-md);
  padding: 14px 16px; box-shadow: var(--shadow-lg); backdrop-filter: blur(14px);
}
.mock-float b { font-size: 22px; color: #22d3ee; }
.mock-float span { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 38px; }
  .hero-visual { max-width: 460px; }
}

/* ---------- 首屏轮播（内置 Hero 为其中一屏） ---------- */
.hero-carousel { position: relative; overflow: hidden; }
.hero-carousel:focus { outline: none; }
.hc-viewport { overflow: hidden; }
.hc-track { display: flex; transition: transform .6s cubic-bezier(.22,.61,.36,1); will-change: transform; }
.hc-slide { flex: 0 0 100%; width: 100%; position: relative; }
.hc-slide.active { z-index: 1; }
.hc-slide-media { min-height: 560px; }
.hc-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hc-overlay {
  position: absolute; inset: 0; display: flex; align-items: center;
  background: linear-gradient(90deg, rgba(6,10,24,.82) 0%, rgba(6,10,24,.45) 55%, rgba(6,10,24,.15) 100%);
}
.hc-overlay-inner { max-width: 1180px; margin: 0 auto; padding: 0 24px; width: 100%; }
.hc-overlay-inner h2 { font-size: 42px; line-height: 1.15; margin: 0 0 14px; font-weight: 800; color: var(--text); }
.hc-overlay-inner p { color: var(--text-secondary); font-size: 17px; line-height: 1.7; margin: 0 0 24px; max-width: 560px; }
.hc-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 44px; height: 44px; border-radius: 50%; cursor: pointer;
  background: rgba(8,14,30,.55); color: #eafdff; border: 1px solid var(--line-strong);
  font-size: 24px; line-height: 1; display: flex; align-items: center; justify-content: center;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); transition: all var(--transition);
}
.hc-arrow:hover { background: rgba(34,211,238,.16); border-color: rgba(34,211,238,.45); }
.hc-prev { left: 18px; }
.hc-next { right: 18px; }
.hc-dots { position: absolute; left: 0; right: 0; bottom: 18px; z-index: 5; display: flex; gap: 9px; justify-content: center; }
.hc-dot {
  width: 9px; height: 9px; padding: 0; border-radius: 50%; cursor: pointer;
  background: rgba(200,220,255,.32); border: 1px solid rgba(200,220,255,.25); transition: all var(--transition);
}
.hc-dot.active { width: 26px; border-radius: 999px; background: var(--accent); border-color: var(--accent); }
@media (max-width: 900px) {
  .hc-slide-media { min-height: 460px; }
  .hc-overlay-inner h2 { font-size: 30px; }
}
@media (max-width: 640px) {
  .hc-slide-media { min-height: 380px; }
  .hc-arrow { width: 36px; height: 36px; font-size: 20px; }
  .hc-overlay-inner h2 { font-size: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .hc-track { transition: none; }
}

/* ---------- 信任条 ---------- */
.trust { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 26px 0; }
.trust-inner { max-width: 1180px; margin: 0 auto; padding: 0 24px; display: flex; flex-wrap: wrap; gap: 14px 40px; justify-content: center; align-items: center; }
.trust-item { display: flex; align-items: baseline; gap: 10px; color: var(--text-secondary); font-size: 13px; }
.trust-item b { font-size: 22px; font-weight: 800; color: var(--accent); }

/* ---------- 功能网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid.features { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1040px) { .grid.features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid.features { grid-template-columns: 1fr; } }
.feature { padding: 26px 24px; }
.feature .ico {
  width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px;
  background: var(--accent-soft); border: 1px solid rgba(34,211,238,.28);
  box-shadow: inset 0 0 18px rgba(34,211,238,.12);
}
.feature h3 { margin: 0 0 8px; font-size: 16px; }
.feature p { margin: 0; color: var(--text-secondary); font-size: 13.5px; line-height: 1.7; }

/* ---------- 工作方式 ---------- */
.grid.steps { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .grid.steps { grid-template-columns: 1fr; } }
.step { padding: 30px 26px; position: relative; }
.step .num {
  font-size: 40px; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, #22d3ee, #6366f1);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}
.step h3 { margin: 0 0 8px; font-size: 17px; }
.step p { margin: 0; color: var(--text-secondary); font-size: 13.5px; line-height: 1.7; }

/* ---------- 定价 ---------- */
.grid.pricing { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
@media (max-width: 900px) { .grid.pricing { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; } }
.plan { padding: 32px 28px; display: flex; flex-direction: column; position: relative; }
.plan.featured { border-color: rgba(34,211,238,.5); box-shadow: 0 18px 50px rgba(0,0,0,.55), 0 0 40px rgba(34,211,238,.16); }
.plan-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #22d3ee, #38bdf8); color: #04121a;
  font-size: 11px; font-weight: 700; padding: 4px 14px; border-radius: 999px; white-space: nowrap;
}
.plan h3 { margin: 0 0 4px; font-size: 18px; }
.plan .desc { color: var(--muted); font-size: 13px; margin: 0 0 18px; }
.plan .price { font-size: 40px; font-weight: 800; color: #eafdff; line-height: 1; }
.plan .price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.plan ul { list-style: none; padding: 0; margin: 22px 0 26px; display: grid; gap: 11px; }
.plan li { display: flex; gap: 10px; font-size: 13.5px; color: var(--text-secondary); }
.plan li i { color: var(--accent); font-style: normal; font-weight: 700; flex: 0 0 auto; }
.plan .cta { margin-top: auto; text-align: center; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: transparent; border: 0; color: var(--text);
  font-size: 15.5px; font-weight: 600; padding: 18px 22px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; font-family: inherit;
}
.faq-q .chev { color: var(--accent); transition: transform var(--transition); flex: 0 0 auto; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a p { margin: 0; padding: 0 22px 20px; color: var(--text-secondary); font-size: 14px; line-height: 1.75; }

/* ---------- 底部 CTA ---------- */
.cta-band { padding: 0 24px 88px; }
.cta-card {
  max-width: 1080px; margin: 0 auto; text-align: center; padding: 56px 32px;
  background: linear-gradient(135deg, rgba(34,211,238,.12), rgba(99,102,241,.10));
  border: 1px solid rgba(34,211,238,.3); border-radius: 24px;
  box-shadow: 0 18px 50px rgba(0,0,0,.5), 0 0 50px rgba(34,211,238,.12);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
}
.cta-card h2 { margin: 0 0 12px; font-size: 30px; color: #eafdff; }
.cta-card p { margin: 0 0 26px; color: var(--text-secondary); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 34px 0; position: relative; z-index: 1; }
.footer-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center;
  color: var(--muted); font-size: 13px;
}
.footer-inner a { color: var(--text-secondary); text-decoration: none; }
.footer-inner a:hover { color: var(--accent); }

/* ---------- 滚动进场 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- 帐号子菜单（鼠标悬停展开，无需点击） ---------- */
.site-account { position: relative; display: inline-block; }
.site-account-trigger {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(20,30,58,.6); color: var(--text);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 7px 12px; font-size: 14px; font-family: inherit; cursor: pointer;
  transition: all var(--transition);
}
.site-account-trigger:hover { background: rgba(34,211,238,.12); border-color: rgba(34,211,238,.45); color: #eafdff; }
.site-account-trigger .caret { font-size: 10px; opacity: .8; }
.site-account-menu {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 190px;
  background: rgba(12,20,40,.96); border: 1px solid var(--line-strong); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 24px rgba(34,211,238,.10);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  padding: 8px; display: none; z-index: 60;
}
.site-account:hover .site-account-menu,
.site-account:focus-within .site-account-menu,
.site-account.open .site-account-menu { display: block; }
/* 悬停桥接区，避免鼠标下移时菜单消失 */
.site-account::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 12px; }
.site-account-menu a, .site-account-menu button {
  display: block; width: 100%; text-align: left; text-decoration: none;
  color: var(--text-secondary); background: transparent; border: 0;
  font-size: 14px; font-family: inherit; padding: 9px 12px; border-radius: var(--radius-sm); cursor: pointer;
}
.site-account-menu a:hover, .site-account-menu button:hover { background: var(--accent-soft); color: #eafdff; }
.site-account-menu .sep { height: 1px; background: var(--line); margin: 6px 4px; }
.site-account-menu .acc-who { padding: 8px 12px 4px; font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
@media (max-width: 860px) {
  .site-account-menu { position: static; top: auto; right: auto; display: none; box-shadow: none; border: 0; background: transparent; padding: 4px 0 0; }
  .site-account:hover .site-account-menu { display: none; }
  .site-account.open .site-account-menu { display: block; }
  .site-account::after { display: none; }
}

/* Hero 第三行：全人类的知识…（强调色） */
.hero-sub2 { color: var(--accent); font-size: 15px; line-height: 1.7; margin: -16px 0 28px; max-width: 560px; }

/* 登录态入口：由 site-account.js 在 body 上加 .is-auth 切换 */
body.is-auth [data-guest-only] { display: none !important; }
body:not(.is-auth) [data-auth-only] { display: none !important; }

/* ---------- 浮动客服窗（官网左侧） ---------- */
.cs-fab { position: fixed; left: 20px; bottom: 24px; z-index: 80; width: 52px; height: 52px; border-radius: 50%;
  border: 1px solid rgba(34,211,238,.4); background: linear-gradient(135deg,#22d3ee,#38bdf8); color:#04121a;
  font-size: 22px; cursor: pointer; box-shadow: 0 8px 24px rgba(0,0,0,.4), 0 0 20px rgba(34,211,238,.3); }
.cs-fab:hover { filter: brightness(1.08); }
.cs-panel { position: fixed; left: 20px; bottom: 86px; z-index: 80; width: 360px; max-width: calc(100vw - 40px);
  height: 480px; max-height: calc(100vh - 120px); display: flex; flex-direction: column;
  background: rgba(12,20,40,.96); border: 1px solid var(--line-strong); border-radius: 16px;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(34,211,238,.12); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); overflow: hidden; }
.cs-head { display:flex; align-items:center; justify-content:space-between; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.cs-tabs { display:flex; gap:6px; }
.cs-tab { background: transparent; border: 0; color: var(--text-secondary); font-size: 14px; padding: 6px 10px; border-radius: 8px; cursor: pointer; font-family: inherit; }
.cs-tab.active { background: var(--accent-soft); color: #eafdff; }
.cs-close { background: transparent; border: 0; color: var(--muted); font-size: 22px; line-height: 1; cursor: pointer; }
.cs-body { flex: 1; display: flex; flex-direction: column; min-height: 0; }
#cs-usage { overflow-y: auto; }
.cs-msgs { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.cs-msg { max-width: 82%; padding: 8px 12px; border-radius: 12px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.cs-msg.visitor { align-self: flex-end; background: rgba(34,211,238,.16); border: 1px solid rgba(34,211,238,.3); color: #eafdff; }
.cs-msg.ai, .cs-msg.operator { align-self: flex-start; background: rgba(20,30,58,.7); border: 1px solid var(--line); color: var(--text); }
.cs-inputrow { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); }
.cs-input { flex: 1; padding: 9px 12px; font-size: 14px; font-family: inherit; background: rgba(8,14,30,.6); color: var(--text); border: 1px solid var(--line-strong); border-radius: 8px; }
.cs-input:focus { outline: none; border-color: var(--accent); }
.cs-empty { color: var(--muted); font-size: 13px; text-align: center; padding: 20px; }
.cs-usage-total { display: flex; gap: 10px; padding: 14px; }
.cs-usage-total > div { flex: 1; text-align: center; background: rgba(20,30,58,.5); border: 1px solid var(--line); border-radius: 10px; padding: 10px 6px; }
.cs-usage-total b { display: block; font-size: 16px; color: var(--accent); }
.cs-usage-total span { font-size: 11px; color: var(--muted); }
.cs-usage-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.cs-usage-table th, .cs-usage-table td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; color: var(--text-secondary); }

/* ---------- 地区模块（语言/货币/国家，悬停展开） ---------- */
.site-region { position: relative; display: inline-block; }
.site-region-trigger {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(20,30,58,.6); color: var(--text);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 7px 12px; font-size: 14px; font-family: inherit; cursor: pointer;
  transition: all var(--transition);
}
.site-region-trigger:hover { background: rgba(34,211,238,.12); border-color: rgba(34,211,238,.45); color: #eafdff; }
.site-region-trigger .caret { font-size: 10px; opacity: .8; }
.site-region-menu {
  position: absolute; right: 0; top: calc(100% + 8px); width: 460px; max-width: calc(100vw - 40px);
  background: rgba(12,20,40,.97); border: 1px solid var(--line-strong); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 24px rgba(34,211,238,.10);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  padding: 12px; display: none; gap: 14px; z-index: 60;
}
.site-region:hover .site-region-menu,
.site-region:focus-within .site-region-menu,
.site-region.open .site-region-menu { display: flex; }
.site-region::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 12px; }
.rg-sec { flex: 1; min-width: 0; }
.rg-title { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin: 2px 4px 6px; }
.rg-item {
  display: block; width: 100%; text-align: left; text-decoration: none;
  color: var(--text-secondary); background: transparent; border: 0;
  font-size: 13px; font-family: inherit; padding: 7px 8px; border-radius: var(--radius-sm); cursor: pointer;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.rg-item:hover { background: var(--accent-soft); color: #eafdff; }
.rg-item.active { background: var(--accent-soft); color: #eafdff; font-weight: 600; }
@media (max-width: 860px) {
  .site-region-menu { position: static; top: auto; right: auto; width: auto; display: none; box-shadow: none; border: 0; background: transparent; padding: 4px 0 0; flex-wrap: wrap; }
  .site-region:hover .site-region-menu { display: none; }
  .site-region.open .site-region-menu { display: flex; }
  .site-region::after { display: none; }
}

/* 价格换算提示（非 USD 时显示“以 USD 结算”） */
.price-note { color: var(--muted); font-size: 12px; margin-top: 4px; }