/* 泽梁云 · 子页面共享样式（含占位动态效果） */
:root {
  --c-bg: #f5faf9;
  --c-bg-2: #eef6f4;
  --c-surface: #ffffff;
  --c-ink: #0c2b2e;
  --c-ink-2: #45666b;
  --c-ink-3: #7c969a;
  --c-line: #dde9e7;
  --c-line-soft: #eaf2f0;
  --c-primary: #0c9488;
  --c-primary-600: #0a7d74;
  --c-primary-700: #08655f;
  --c-primary-50: #e6f5f3;
  --c-primary-100: #cceae6;
  --c-cyan: #38bdf8;
  --c-accent: #f0a732;
  --c-deep: #07353b;
  --c-deep-2: #0b4349;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(12,43,46,.05), 0 1px 3px rgba(12,43,46,.06);
  --shadow-md: 0 6px 20px -6px rgba(12,43,46,.12);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", Georgia, serif;
  --nav-h: 68px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-sans); color: var(--c-ink); background: var(--c-bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
svg { display: block; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

/* 导航 */
.nav { position: sticky; top: 0; z-index: 60; background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid var(--c-line-soft); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; flex: none; background: linear-gradient(135deg, var(--c-primary), var(--c-cyan)); display: grid; place-items: center; color: #fff; box-shadow: 0 6px 14px -5px rgba(12,148,136,.6); }
.brand small { display: block; font-size: 10.5px; font-weight: 500; color: var(--c-ink-3); letter-spacing: .18em; line-height: 1; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav-links a { font-size: 14.5px; font-weight: 500; color: var(--c-ink-2); padding: 8px 13px; border-radius: 9px; transition: all .15s ease; }
.nav-links a:hover { color: var(--c-ink); background: var(--c-bg-2); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.user-entry { display: inline-flex; align-items: center; gap: 9px; padding: 4px 13px 4px 4px; border-radius: 999px; border: 1px solid var(--c-line); background: var(--c-surface); }
.user-entry:hover { border-color: var(--c-primary); box-shadow: var(--shadow-sm); }
.user-avatar { width: 30px; height: 30px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), var(--c-cyan)); color: #fff; display: grid; place-items: center; flex: none; }
.user-avatar svg { width: 16px; height: 16px; }
.user-name { font-size: 13.5px; font-weight: 600; color: var(--c-ink-2); }

/* 占位主体（含动态效果） */
.placeholder {
  position: relative; overflow: hidden;
  min-height: calc(100vh - var(--nav-h) - 180px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 80px 28px;
}
.placeholder::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(640px 320px at 50% 26%, rgba(56,189,248,.14), transparent 65%),
    radial-gradient(520px 320px at 50% 74%, rgba(12,148,136,.14), transparent 65%);
  animation: bgDrift 7s ease-in-out infinite;
}

.anim { position: relative; width: 180px; height: 180px; display: grid; place-items: center; margin-bottom: 42px; z-index: 1; }
.logo-badge {
  width: 98px; height: 98px; border-radius: 28px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-cyan));
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 24px 48px -14px rgba(12,148,136,.55);
  animation: breathe 4s ease-in-out infinite;
  position: relative; z-index: 2;
}
.logo-badge svg { width: 54px; height: 54px; }
.ripple {
  position: absolute; left: 50%; top: 50%;
  width: 130px; height: 130px; margin-left: -65px; margin-top: -65px;
  border: 1.5px solid rgba(12,148,136,.45); border-radius: 50%;
  animation: ripple 3.2s ease-out infinite;
}
.ripple.r2 { animation-delay: 1.05s; }
.ripple.r3 { animation-delay: 2.1s; }

.ph-inner { position: relative; z-index: 1; animation: rise .8s ease both; }
.ph-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600;
  color: var(--c-primary-600); background: var(--c-primary-50); border: 1px solid var(--c-primary-100);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 24px;
}
.ph-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-primary); box-shadow: 0 0 0 3px rgba(12,148,136,.15); }
.placeholder h1 { font-family: var(--font-serif); font-size: clamp(30px, 4vw, 44px); color: var(--c-deep); margin-bottom: 16px; letter-spacing: .02em; }
.placeholder p { font-size: 16px; color: var(--c-ink-2); max-width: 460px; }
.placeholder .back {
  margin-top: 34px; display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px;
  color: #fff; background: var(--c-primary); padding: 13px 24px; border-radius: 12px;
  box-shadow: 0 8px 20px -8px rgba(12,148,136,.55); transition: all .16s ease;
}
.placeholder .back:hover { background: var(--c-primary-600); }

@keyframes ripple {
  0% { transform: scale(0.3); opacity: 0; }
  18% { opacity: .9; }
  100% { transform: scale(1.6); opacity: 0; }
}
@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
@keyframes bgDrift {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

/* 页脚 */
footer { background: #073035; color: #a9ccc7; padding: 36px 0 24px; }
.foot-bottom { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: #7fa8a2; }
.foot-bottom a { color: #a9ccc7; }
.foot-bottom a:hover { color: #fff; }

@media (max-width: 640px) {
  .nav-links { display: none; }
  .user-name { display: none; }
  .user-entry { padding: 4px; }
}