/* 登录 / 注册页（网站门面）：流光背景 + 网格 + 左侧介绍 + 毛玻璃登录卡片；浅色 / 深色都适配 */
.login {
  --lg-bg: #f6f5fb;
  --lg-grid: rgba(30, 30, 60, 0.06);
  --lg-orb: .75;
  --lg-card: rgba(255, 255, 255, 0.72);
  --lg-card-border: rgba(255, 255, 255, 0.9);
  --lg-chip: rgba(255, 255, 255, 0.7);
  --grad: linear-gradient(100deg, #ff7a2f 0%, #ff4f81 45%, #8b5cf6 80%, #3b82f6 100%);
  position: relative; min-height: 100%; overflow-x: hidden; overflow-y: auto;
  display: flex; flex-direction: column; background: var(--lg-bg); isolation: isolate;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .login { --lg-bg: #07070b; --lg-grid: rgba(255, 255, 255, 0.05); --lg-orb: .6; --lg-card: rgba(22, 22, 30, 0.66); --lg-card-border: rgba(255, 255, 255, 0.09); --lg-chip: rgba(255, 255, 255, 0.06); }
}
:root[data-theme="dark"] .login { --lg-bg: #07070b; --lg-grid: rgba(255, 255, 255, 0.05); --lg-orb: .6; --lg-card: rgba(22, 22, 30, 0.66); --lg-card-border: rgba(255, 255, 255, 0.09); --lg-chip: rgba(255, 255, 255, 0.06); }

/* ---------- 背景：三团缓慢漂移的光 + 渐隐的科技网格 ---------- */
.login-bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.login-bg .orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: var(--lg-orb); will-change: transform; }
.login-bg .o1 { width: 46vmax; height: 46vmax; left: -12vmax; top: -16vmax; background: radial-gradient(circle, #ff7a2f, transparent 65%); animation: drift1 22s ease-in-out infinite alternate; }
.login-bg .o2 { width: 40vmax; height: 40vmax; right: -14vmax; top: 6vmax; background: radial-gradient(circle, #8b5cf6, transparent 65%); animation: drift2 26s ease-in-out infinite alternate; }
.login-bg .o3 { width: 36vmax; height: 36vmax; left: 30vw; bottom: -20vmax; background: radial-gradient(circle, #22d3ee, transparent 65%); opacity: calc(var(--lg-orb) * .7); animation: drift3 30s ease-in-out infinite alternate; }
.login-bg .grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--lg-grid) 1px, transparent 1px), linear-gradient(90deg, var(--lg-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
}
@keyframes drift1 { to { transform: translate(14vw, 10vh) scale(1.1); } }
@keyframes drift2 { to { transform: translate(-12vw, 14vh) scale(.92); } }
@keyframes drift3 { to { transform: translate(-16vw, -10vh) scale(1.08); } }

.theme-fab {
  position: absolute; top: calc(14px + env(safe-area-inset-top)); right: 14px; z-index: 2;
  width: 40px; height: 40px; border-radius: 50%; background: var(--lg-chip); border: 1px solid var(--lg-card-border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); color: var(--text);
}

/* ---------- 布局：电脑上左边介绍、右边卡片 ---------- */
.login-wrap {
  flex: 1; width: min(1120px, 100%); margin: 0 auto; padding: 56px 28px 24px;
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, 400px); grid-template-areas: "hero card" "more card";
  column-gap: 64px; row-gap: 28px; align-content: center; align-items: center;
}
.login-hero { grid-area: hero; align-self: end; animation: rise .6s ease both; }
.login-card { grid-area: card; }
.login-more { grid-area: more; align-self: start; animation: rise .6s .1s ease both; }

.brand-row { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: .5px; padding: 6px 14px 6px 6px; border-radius: 999px; background: var(--lg-chip); border: 1px solid var(--lg-card-border); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.brand-logo { position: relative; display: inline-grid; place-items: center; width: 32px; height: 32px; }
.brand-logo img { width: 30px; height: 30px; border-radius: 9px; position: relative; }
.brand-logo::before {
  content: ""; position: absolute; inset: -3px; border-radius: 12px;
  background: conic-gradient(from var(--spin, 0deg), #ff7a2f, #ff4f81, #8b5cf6, #22d3ee, #ff7a2f); animation: ring-spin 5s linear infinite;
  filter: blur(.5px);
}
.login-hero h1 { margin: 22px 0 16px; font-size: clamp(34px, 4.6vw, 58px); line-height: 1.12; font-weight: 800; letter-spacing: -.5px; }
.login .grad {
  background: var(--grad); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 8s ease-in-out infinite alternate;
}
@keyframes shimmer { to { background-position: 100% 0; } }
.login-hero .lead { margin: 0; max-width: 34em; color: var(--muted); font-size: 17px; line-height: 1.75; }

.feats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.feats li {
  position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 12px; row-gap: 1px; align-items: center;
  padding: 13px 14px; border-radius: 16px;
  background: var(--lg-chip); border: 1px solid var(--lg-card-border); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  animation: rise .5s calc(.15s + var(--i, 0) * .06s) ease both;
}
.feats .fi {
  grid-row: span 2; width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; color: #fff;
  background: var(--grad); background-size: 160% 160%; box-shadow: 0 6px 16px -6px rgba(139, 92, 246, .6);
}
.feats li:nth-child(2) .fi { background-position: 40% 0; }
.feats li:nth-child(3) .fi { background-position: 80% 0; }
.feats li:nth-child(4) .fi { background-position: 100% 0; }
.feats b { font-size: 15px; }
.feats span { font-size: 13px; color: var(--muted); line-height: 1.45; }
.brands { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; font-size: 13px; }
.brands .lbl { color: var(--faint); margin-right: 2px; }
.brands .chip { padding: 4px 11px; border-radius: 999px; background: var(--lg-chip); border: 1px solid var(--lg-card-border); color: var(--text); font-weight: 600; }

/* ---------- 登录卡片：毛玻璃 + 渐变描边光 ---------- */
.login-card {
  position: relative; display: grid; gap: 14px; padding: 30px 28px 24px; text-align: center; border-radius: 24px;
  background: var(--lg-card); border: 1px solid var(--lg-card-border);
  backdrop-filter: blur(22px) saturate(1.4); -webkit-backdrop-filter: blur(22px) saturate(1.4);
  box-shadow: 0 30px 80px -20px rgba(80, 40, 160, 0.35), 0 2px 6px rgba(0, 0, 0, 0.06);
  animation: rise .6s .05s ease both;
}
.login-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 122, 47, .7), transparent 35%, transparent 65%, rgba(139, 92, 246, .7));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
}
.card-head h2 { margin: 0; font-size: 22px; font-weight: 750; }
.card-head p { margin: 4px 0 2px; color: var(--muted); font-size: 14px; }
.login .input { min-height: 48px; border-radius: 12px; text-align: center; font-size: 16px; background: color-mix(in srgb, var(--panel) 80%, transparent); }
.login .btn.primary {
  min-height: 48px; border-radius: 12px; font-size: 16px; font-weight: 650; border: 0; color: #fff;
  background: linear-gradient(100deg, #ff7a2f, #ff4f81); box-shadow: 0 10px 26px -8px rgba(255, 79, 129, .6);
  transition: transform .15s, box-shadow .15s, filter .15s;
}
.login .btn.primary:hover { filter: brightness(1.06); box-shadow: 0 14px 30px -8px rgba(255, 79, 129, .7); }
.login .btn.primary:active { transform: scale(.98); }
.login .err { color: var(--danger); font-size: 13px; }
.login .err:empty { display: none; }
.trust { list-style: none; margin: 2px 0 0; padding: 12px 0 0; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 14px; font-size: 12px; color: var(--faint); white-space: nowrap; }
.trust li::before { content: "✓"; margin-right: 4px; color: var(--ok); font-weight: 700; }
.login-foot { text-align: center; padding: 10px 16px calc(14px + env(safe-area-inset-bottom)); font-size: 12px; color: var(--faint); }

/* ---------- 登录 / 注册切换 ---------- */
.seg { display: grid; grid-template-columns: 1fr 1fr; padding: 3px; border-radius: 12px; background: var(--hover); }
.seg button { border: 0; background: transparent; border-radius: 9px; padding: 7px 0; color: var(--muted); font-size: 14px; }
.seg button.on { background: var(--panel); color: var(--text); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08); }

/* ---------- 手机 / 窄屏：紧凑的上下排列（标题 → 登录卡片 → 功能介绍） ---------- */
@media (max-width: 900px) {
  .login-wrap { grid-template-columns: minmax(0, 1fr); grid-template-areas: "hero" "card" "more"; padding: calc(58px + env(safe-area-inset-top)) 18px 12px; row-gap: 18px; align-content: start; }
  .login-hero { text-align: center; align-self: auto; }
  .login-hero h1 { margin: 14px 0 8px; font-size: clamp(30px, 9vw, 40px); line-height: 1.15; }
  .login-hero .lead { font-size: 14px; line-height: 1.6; margin: 0 auto; max-width: 22em; }
  .lead-more { display: none; }
  .login-card { width: min(400px, 100%); margin: 0 auto; padding: 22px 18px 16px; gap: 11px; border-radius: 22px; }
  .card-head h2 { font-size: 20px; }
  .card-head p { font-size: 13px; margin-top: 2px; }
  .login .input, .login .btn.primary { min-height: 46px; }
  .trust { gap: 4px 10px; font-size: 11.5px; padding-top: 10px; }
  .login-more { width: min(400px, 100%); margin: 0 auto; }
  .feats { gap: 8px; }
  .feats li { grid-template-columns: minmax(0, 1fr); row-gap: 4px; padding: 12px; text-align: left; }
  .feats .fi { grid-row: auto; width: 32px; height: 32px; border-radius: 10px; }
  .feats b { font-size: 14px; }
  .feats span { font-size: 12px; }
  .brands { justify-content: center; margin-top: 14px; }
  .login-bg .o1 { width: 90vmax; height: 90vmax; left: -40vmax; top: -40vmax; }
  .login-bg .o2 { width: 70vmax; height: 70vmax; right: -36vmax; top: 10vmax; }
  .login-bg .grid { background-size: 32px 32px; }
}

@media (prefers-reduced-motion: reduce) {
  .login-bg .orb, .login .grad, .brand-logo::before { animation: none; }
}