/* ============================================================
   CN CHROME — additive styles
   Header dropdowns + system name + Chinese footer columns
   ============================================================ */

/* Header overrides */
.cn-header .inner { gap: 32px; align-items: center; }
.cn-header .brand-block {
  display: flex; align-items: center; gap: 14px;
  text-decoration: none;
  flex-shrink: 0;
}
.cn-header .brand-block .logo { height: 24px; }
.cn-header .brand-block .system-name {
  display: inline-block;
  border-left: 1px solid var(--silver-300);
  padding-left: 14px;
  font-size: 12px; line-height: 1.25;
  font-weight: 600; color: var(--fg-1);
  letter-spacing: 0.02em;
  max-width: 180px;
}

/* Main nav with dropdowns */
.cn-header .main-nav {
  display: flex; align-items: center; gap: 28px;
  flex: 1; justify-content: center;
}
.cn-header .nav-link {
  background: none; border: 0; padding: 6px 0; cursor: pointer;
  font-family: var(--font-sans); font-size: 13px; font-weight: 600;
  color: var(--fg-1); letter-spacing: 0.02em;
  display: inline-flex; align-items: center; gap: 6px;
  position: relative;
  text-decoration: none;
}
.cn-header .nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -3px;
  height: 2px; width: 0; background: var(--accent);
  transition: width var(--dur-med) var(--ease-standard);
}
.cn-header .nav-link:hover { color: var(--accent); }
.cn-header .nav-link:hover::after { width: 100%; }
.cn-header .nav-link svg { transition: transform var(--dur-fast); }

.cn-header .nav-dd { position: relative; }
.cn-header .nav-dd.on .nav-link { color: var(--accent); }
.cn-header .nav-dd.on .nav-link svg { transform: rotate(180deg); }
.cn-header .nav-dd-menu {
  position: absolute; top: calc(100% + 14px); left: -16px;
  min-width: 240px; background: #fff;
  border: 1px solid var(--silver-300);
  box-shadow: 0 16px 40px rgba(0,0,0,0.10);
  padding: 8px 0;
  animation: ddIn 0.18s ease-out;
  z-index: 60;
}
@keyframes ddIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.cn-header .nav-dd-menu a {
  display: block; padding: 11px 18px;
  font-size: 13px; color: var(--fg-1); cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
  text-decoration: none;
}
.cn-header .nav-dd-menu a:hover { background: var(--silver-100); color: var(--accent); }

/* Right cluster */
.cn-header .right {
  display: flex; align-items: center; gap: 16px; flex-shrink: 0;
}

/* Login / register button (logged-out state) */
.cn-login-btn {
  background: var(--accent); color: #fff; border: 0;
  font-family: var(--font-sans); font-weight: 700;
  font-size: 12px; letter-spacing: 0.06em;
  padding: 9px 18px; cursor: pointer;
  transition: background var(--dur-fast);
}
.cn-login-btn:hover { background: var(--accent-deep); }

/* CN avatar menu — buttons not links */
.cn-user-menu {
  min-width: 240px;
}
.cn-user-menu .who {
  padding: 16px 18px 14px;
}
.cn-user-menu .who .name { font-size: 14px; font-weight: 700; color: var(--fg-1); margin: 0; }
.cn-user-menu .who .email { font-size: 11px; color: var(--silver-700); font-family: var(--font-mono); margin: 4px 0 0; letter-spacing: 0.02em; }
.cn-user-menu a, .cn-user-menu .menu-btn {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 18px; font-size: 13px; color: var(--fg-1);
  cursor: pointer; transition: background var(--dur-fast);
  background: none; border: 0; width: 100%; text-align: left;
  text-decoration: none;
}
.cn-user-menu a:hover, .cn-user-menu .menu-btn:hover { background: var(--silver-100); }
.cn-user-menu .divider { height: 1px; background: var(--silver-300); margin: 4px 0; }
.cn-user-menu a.signout { color: var(--accent); font-weight: 600; }
.cn-user-menu a.signout:hover { background: rgba(173,30,42,0.06); }
.cn-header .lang-wrap { position: relative; }
.cn-header .lang {
  background: none; border: 0; cursor: pointer; padding: 6px 4px;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: var(--fg-1);
  letter-spacing: 0.04em;
}
.cn-header .lang img { width: 14px; height: 14px; }
.cn-header .lang:hover { color: var(--accent); }
.cn-header .lang-menu {
  position: absolute; top: calc(100% + 12px); right: 0;
  min-width: 200px; background: #fff;
  border: 1px solid var(--silver-300);
  box-shadow: 0 16px 40px rgba(0,0,0,0.10);
  padding: 6px 0; animation: ddIn 0.18s ease-out;
  z-index: 60;
}
.cn-header .lang-menu a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; font-size: 13px; color: var(--fg-1); cursor: pointer;
  transition: background var(--dur-fast);
}
.cn-header .lang-menu a:hover { background: var(--silver-100); color: var(--accent); }
.cn-header .lang-menu .code { font-family: var(--font-mono); font-size: 10px; color: var(--silver-700); letter-spacing: 0.04em; }

/* CN Footer */
.cn-footer .top {
  display: grid;
  grid-template-columns: 1fr 1.15fr 1fr minmax(230px, 0.95fr);  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.cn-footer .brand {
  justify-self: end;
  text-align: right;
  display: flex; flex-direction: column; align-items: flex-end; gap: 18px;
}
.cn-footer .brand .flogo { height: 34px; width: auto; display: block; filter: none; margin-bottom: 0; }
.cn-footer .brand .sysline {
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  color: #fff; margin: 0;
}
.cn-footer .brand .social { display: flex; gap: 10px; }
.cn-footer .brand .social a {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: opacity .2s cubic-bezier(.25,.46,.45,.94);
}
.cn-footer .brand .social a:hover { opacity: .68; }
.cn-footer .brand .social img { width: 22px; height: 22px; display: block; }
@media (max-width: 1100px) {
  .cn-footer .brand { justify-self: start; text-align: left; align-items: flex-start; }
}
.cn-footer .col a.cookie-mgr {
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 10px; display: inline-block;
  margin: 4px 0 10px; font-size: 11px;
  letter-spacing: 0.06em;
}
.cn-footer .col a.cookie-mgr:hover {
  border-color: rgba(255,255,255,.55); color: rgba(255,255,255,.7); text-decoration: none;
}
.cn-footer .brand .social a:hover { text-decoration: none; }
.cn-footer .legal a.cookie-mgr:hover { border-color: rgba(255,255,255,.55); color: rgba(255,255,255,.7); text-decoration: none; }

/* Back button shared by sub-pages */
.back-bar {
  padding-top: calc(var(--header-h) + 24px);
  background: #fff;
}
.back-bar .container { padding-top: 0; }
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  background: none; border: 0; padding: 8px 0; cursor: pointer;
  font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
  color: var(--silver-700);
  transition: color var(--dur-fast);
}
.back-link:hover { color: var(--accent); }
.back-link svg { transition: transform var(--dur-fast); }
.back-link:hover svg { transform: translateX(-3px); }

/* When back bar precedes a subhead, drop the subhead's own top padding */
.back-bar + section.uc-subhead,
.back-bar + section.rt-subhead,
.back-bar + section.dd-subhead,
.back-bar + section.dr-subhead,
.back-bar + section.mb-subhead { padding-top: 12px; }

/* Required checkbox row */
.rt-agree {
  margin-top: 20px;
  padding: 16px 18px;
  background: var(--silver-100);
  border-left: 3px solid var(--accent);
  display: flex; align-items: flex-start; gap: 12px;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.rt-agree:hover { background: rgba(173,30,42,0.04); }
.rt-agree.on { background: rgba(28,135,80,0.05); border-left-color: #1C8750; }
.rt-agree input[type="checkbox"] {
  appearance: none; -webkit-appearance: none;
  width: 18px; height: 18px;
  border: 1.5px solid var(--silver-400);
  background: #fff; cursor: pointer;
  flex-shrink: 0; margin-top: 2px;
  position: relative;
  transition: all var(--dur-fast);
}
.rt-agree input[type="checkbox"]:checked {
  background: var(--accent); border-color: var(--accent);
}
.rt-agree input[type="checkbox"]:checked::after {
  content: "";
  position: absolute; left: 5px; top: 1px;
  width: 4px; height: 9px;
  border: solid #fff; border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.rt-agree .agree-txt {
  font-size: 13px; line-height: 1.6; color: var(--fg-1);
  flex: 1;
}
.rt-agree .agree-txt .req {
  color: var(--accent); font-weight: 700; margin-right: 4px;
}
.rt-agree .agree-txt a {
  color: var(--accent); text-decoration: underline; cursor: pointer;
}

@media (max-width: 1200px) {
  .cn-header .brand-block .system-name { display: none; }
}
@media (max-width: 980px) {
  .cn-header .main-nav { display: none; }
}
@media (max-width: 1100px) {
  .cn-footer .top { grid-template-columns: 1fr 1fr; gap: 28px; }
}