.auth-placeholder {
  /* 直接引用全局主题色，跟随 :root 变化 */
  --accent: var(--accent-color, #5c99ee);
  --fg: var(--heading-color, #344761);
  --muted: var(--default-color, #535d6b);
  --bg: var(--background-color, #ffffff);
  --surface: var(--surface-color, #ffffff);
  --contrast: var(--contrast-color, #ffffff);
  /* 组件私有派生色 */
  --accent-2: #4a87d4;
  --accent-2: color-mix(in srgb, var(--accent) 80%, #1a2a40);
  --bg-soft: #f4f6fa;
  --bg-soft-2: #eaeef5;
  --muted-2: #8a93a3;
  --border: color-mix(in srgb, var(--accent) 22%, transparent);
  --border-hi: color-mix(in srgb, var(--accent) 55%, transparent);

  position: relative;
  width: 100%;
  min-height: 520px;
  border-radius: 18px;
  overflow: hidden;
  background: radial-gradient(
    ellipse 80% 60% at 50% 0%,
    var(--bg) 0%,
    var(--bg-soft-2) 48%,
    var(--bg-soft) 100%
  );
  font-family: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  color: var(--fg);
  isolation: isolate;
  box-shadow:
    0 10px 40px -30px rgba(52, 71, 97, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

/* 背景层：模拟"被隐藏的真实内容" */
.auth-placeholder .ghost {
  position: absolute;
  inset: -5%;
  z-index: 0;
  filter: blur(13px) saturate(0.7);
  opacity: 0.55;
  transform: scale(1.05);
  animation: drift 26s ease-in-out infinite alternate;
  pointer-events: none;
}
.auth-placeholder .ghost-row {
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(90deg, #d8dde6, #c3cad6, #e4e8ee);
  margin: 0 0 14px;
}
.auth-placeholder .ghost-row.w-90 {
  width: 90%;
}
.auth-placeholder .ghost-row.w-70 {
  width: 70%;
}
.auth-placeholder .ghost-row.w-50 {
  width: 50%;
}
.auth-placeholder .ghost-row.w-40 {
  width: 40%;
}
.auth-placeholder .ghost-title {
  height: 34px;
  width: 60%;
  border-radius: 6px;
  background: linear-gradient(90deg, #b8c4d4, #9aa9bc);
  margin: 0 0 22px;
}
.auth-placeholder .ghost-media {
  height: 160px;
  border-radius: 10px;
  background: linear-gradient(135deg, #dde2ea, #c7cfdb, #e8ebf0);
  margin: 0 0 18px;
}
.auth-placeholder .ghost-inner {
  padding: 46px 52px;
  max-width: 760px;
}

@keyframes drift {
  0% {
    transform: translate(0, 0) scale(1.05);
  }
  100% {
    transform: translate(-1.5%, 1.5%) scale(1.08);
  }
}

/* 柔光遮罩，让中心卡片更突出（浅色版） */
.auth-placeholder .scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(
      ellipse 55% 60% at 50% 50%,
      rgba(255, 255, 255, 0.35) 0%,
      rgba(244, 246, 250, 0.75) 70%,
      rgba(244, 246, 250, 0.95) 100%
    ),
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.3) 0%,
      rgba(244, 246, 250, 0.5) 100%
    );
  pointer-events: none;
}

/* 主卡片 */
.auth-placeholder .lock-card {
  position: relative;
  z-index: 2;
  max-width: 440px;
  margin: 48px auto;
  padding: 40px 36px 32px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.9) inset,
    0 30px 60px -20px rgba(52, 71, 97, 0.18),
    0 0 0 1px color-mix(in srgb, var(--accent) 6%, transparent);
  text-align: center;
}
.auth-placeholder .lock-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 16px;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 35%, transparent),
    transparent 30%,
    transparent 70%,
    color-mix(in srgb, var(--accent-2) 25%, transparent)
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  padding: 1px;
  pointer-events: none;
}

/* 锁图标 */
.auth-placeholder .lock-ico {
  width: 62px;
  height: 62px;
  margin: 0 auto 22px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 25%, #ffffff, #eaf1fb);
  border: 1px solid var(--border-hi);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 0 0 8px color-mix(in srgb, var(--accent) 6%, transparent),
    0 8px 24px -8px color-mix(in srgb, var(--accent) 35%, transparent);
  position: relative;
}
.auth-placeholder .lock-ico svg {
  width: 24px;
  height: 24px;
  display: block;
}
.auth-placeholder .lock-ico::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) translateY(8px);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
    transform: translate(-50%, -50%) translateY(8px) scale(0.85);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) translateY(8px) scale(1.15);
  }
}

/* 文案 */
.auth-placeholder h2 {
  font-family: "Fraunces", serif;
  font-weight: 700;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--fg);
}
.auth-placeholder h2 em {
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}
.auth-placeholder .sub {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 26px;
}
.auth-placeholder .sub b {
  color: var(--fg);
  font-weight: 500;
}

/* 表单 */
.auth-placeholder .field {
  position: relative;
  margin-bottom: 12px;
}
.auth-placeholder .field input {
  width: 100%;
  box-sizing: border-box;
  padding: 13px 14px 13px 40px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition:
    border-color 0.2s,
    box-shadow 0.2s,
    background 0.2s;
}
.auth-placeholder .field input::placeholder {
  color: var(--muted-2);
}
.auth-placeholder .field input:focus {
  border-color: var(--border-hi);
  background: #ffffff;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent);
}
.auth-placeholder .field .ico {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--muted);
  pointer-events: none;
  transition: color 0.2s;
}
.auth-placeholder .field input:focus + .ico {
  color: var(--accent);
}

.auth-placeholder .submit {
  width: 100%;
  padding: 13px 16px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: var(--contrast);
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    transform 0.15s,
    box-shadow 0.2s,
    filter 0.2s;
  box-shadow:
    0 8px 24px -8px color-mix(in srgb, var(--accent) 50%, transparent),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}
.auth-placeholder .submit:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
  box-shadow:
    0 12px 30px -8px color-mix(in srgb, var(--accent) 65%, transparent),
    0 0 0 1px rgba(255, 255, 255, 0.15) inset;
}
.auth-placeholder .submit:active {
  transform: translateY(0);
}

.auth-placeholder .hint {
  margin: 18px 0 0;
  font-size: 12.5px;
  color: var(--muted-2);
  line-height: 1.5;
}
.auth-placeholder .hint a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding-bottom: 1px;
}
.auth-placeholder .hint a:hover {
  border-color: var(--accent);
}

/* 角标 */
.auth-placeholder .badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.auth-placeholder .badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

@media (max-width: 520px) {
  .auth-placeholder .lock-card {
    margin: 24px 14px;
    padding: 32px 22px 26px;
  }
  .auth-placeholder h2 {
    font-size: 24px;
  }
  .auth-placeholder .ghost-inner {
    padding: 30px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-placeholder .ghost,
  .auth-placeholder .lock-ico::after {
    animation: none;
  }
}