/* ============================================================================
   门户与子站共享视觉：天蓝色大网格 + 零星飘动的粉色星星
   ----------------------------------------------------------------------------
   · 网格用两向 linear-gradient 平铺，深色模式下换成深蓝网格
   · 星星由 .star 元素 + 各自随机的动画参数构成，JS 只负责撒点
   · 全部动画在 prefers-reduced-motion: reduce 时关闭
   ========================================================================= */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --sky-50:  #eff8ff;
  --sky-100: #e0f2fe;
  --sky-200: #bae6fd;
  --sky-300: #7dd3fc;
  --sky-500: #0ea5e9;
  --sky-600: #0284c7;
  --sky-700: #0369a1;
  --pink-300: #f9a8d4;
  --pink-400: #f472b6;
  --pink-500: #ec4899;

  --bg:      #e8f4ff;
  --grid:    rgba(56, 189, 248, 0.16);
  --grid-2:  rgba(56, 189, 248, 0.09);
  --card:    rgba(255, 255, 255, 0.88);
  --card-solid: #ffffff;
  --ink:     #0b3550;
  --ink-soft:#4a7691;
  --line:    rgba(125, 211, 252, 0.55);
  --accent:  var(--sky-500);
  --accent-2: var(--sky-600);
  --star:    var(--pink-400);
  --danger:  #e11d48;
  --ok:      #0d9488;
  --shadow:  0 10px 30px rgba(12, 74, 110, 0.10);
  --shadow-lift: 0 18px 44px rgba(12, 74, 110, 0.16);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg:      #06182a;
  --grid:    rgba(56, 189, 248, 0.13);
  --grid-2:  rgba(56, 189, 248, 0.06);
  --card:    rgba(13, 40, 62, 0.86);
  --card-solid: #0d283e;
  --ink:     #e2f2ff;
  --ink-soft:#8fb6d0;
  --line:    rgba(56, 189, 248, 0.24);
  --accent:  var(--sky-300);
  --accent-2: var(--sky-200);
  --star:    var(--pink-300);
  --danger:  #fb7185;
  --ok:      #2dd4bf;
  --shadow:  0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lift: 0 18px 44px rgba(0, 0, 0, 0.55);
  color-scheme: dark;
}

html, body { min-height: 100%; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background-color: var(--bg);
  /* 大网格：40px 一格，主线 + 更淡的次网格线叠出层次 */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-2) 1px, transparent 1px);
  background-size: 160px 160px, 160px 160px, 40px 40px, 40px 40px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ---------------------------------------------------------------- 星层 */

#stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.star {
  position: absolute;
  display: block;
  color: var(--star);
  opacity: 0;
  will-change: transform, opacity;
  animation-name: starFloat;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

/* 四角星：用 clip-path 抠出来，比 SVG 轻 */
.star::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: currentColor;
  clip-path: polygon(50% 0%, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0% 50%, 39% 39%);
  filter: drop-shadow(0 0 6px currentColor);
}

@keyframes starFloat {
  0%   { opacity: 0;    transform: translate3d(0, 12px, 0) rotate(0deg) scale(0.85); }
  15%  { opacity: 0.75; }
  50%  { opacity: 0.55; transform: translate3d(var(--dx, 14px), -18px, 0) rotate(38deg) scale(1.05); }
  85%  { opacity: 0.7; }
  100% { opacity: 0;    transform: translate3d(calc(var(--dx, 14px) * -0.6), -38px, 0) rotate(-22deg) scale(0.9); }
}

/* ---------------------------------------------------------------- 顶栏 */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px clamp(12px, 4vw, 28px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.topbar .brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
}
.topbar .brand .dot-star {
  width: 10px; height: 10px; border-radius: 3px;
  background: linear-gradient(135deg, var(--sky-300), var(--pink-400));
}

.topbar .spacer { flex: 1; }

.tnav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.tnav a, .tnav button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font: inherit;
  font-size: 13.5px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 11px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.tnav a:hover, .tnav button:hover {
  color: var(--accent-2);
  background: color-mix(in srgb, var(--sky-300) 16%, transparent);
  border-color: var(--line);
}
.tnav a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-500), var(--sky-600));
  border-color: transparent;
}
.tnav .badge-dot {
  min-width: 17px; height: 17px; padding: 0 4px;
  border-radius: 999px;
  background: var(--pink-500);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  display: inline-grid;
  place-items: center;
  line-height: 1;
}

/* ---------------------------------------------------------------- 布局 */

.shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 940px;
  margin: 0 auto;
  padding: clamp(20px, 5vw, 46px) clamp(14px, 4vw, 28px) 64px;
}

.card {
  background: var(--card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: clamp(18px, 4vw, 28px);
}

.card + .card { margin-top: 18px; }

h1.title {
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 800;
  letter-spacing: 0.5px;
  line-height: 1.3;
}
h1.title .grad {
  background: linear-gradient(92deg, var(--sky-600), var(--pink-400));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle { color: var(--ink-soft); font-size: 14px; margin-top: 8px; }

/* ---------------------------------------------------------------- 表单 */

.field { margin-bottom: 15px; }
.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.field input, .field textarea, .field select {
  width: 100%;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 13px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--sky-400, var(--sky-300));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--sky-300) 35%, transparent);
}
.field textarea { min-height: 96px; resize: vertical; line-height: 1.65; }
.field .hint { font-size: 12px; color: var(--ink-soft); margin-top: 5px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font: inherit;
  font-size: 14.5px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.16s ease, background 0.16s ease;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-500), var(--sky-600));
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.32);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(14, 165, 233, 0.4); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-ghost {
  color: var(--ink-soft);
  background: transparent;
  border-color: var(--line);
}
.btn-ghost:hover { color: var(--accent-2); border-color: var(--sky-300); }
.btn-pink {
  color: #fff;
  background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
  box-shadow: 0 8px 20px rgba(236, 72, 153, 0.28);
}
.btn-pink:hover { transform: translateY(-1px); }
.btn-block { width: 100%; }
.btn-sm { font-size: 13px; padding: 7px 12px; border-radius: 10px; }

/* ---------------------------------------------------------------- 提示 */

.alert {
  border-radius: 12px;
  padding: 10px 13px;
  font-size: 13.5px;
  margin-bottom: 14px;
  border: 1px solid transparent;
  display: none;
}
.alert.show { display: block; }
.alert-error { color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }
.alert-ok    { color: var(--ok);     background: color-mix(in srgb, var(--ok) 12%, transparent);     border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.alert-info  { color: var(--sky-700); background: color-mix(in srgb, var(--sky-300) 20%, transparent); border-color: var(--line); }
[data-theme="dark"] .alert-info { color: var(--sky-200); }

.muted { color: var(--ink-soft); font-size: 13px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.grow { flex: 1; }

/* ---------------------------------------------------------------- 头像 */

.avatar {
  width: 56px; height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  flex: 0 0 auto;
  box-shadow: 0 8px 18px rgba(12, 74, 110, 0.22);
  letter-spacing: 0;
}
.avatar-lg { width: 78px; height: 78px; border-radius: 24px; font-size: 30px; }

/* ---------------------------------------------------------------- 移动端 */

@media (max-width: 640px) {
  .topbar { padding: 8px 12px; gap: 8px; }
  .topbar .brand span.full { display: none; }
  .tnav a, .tnav button { font-size: 12.5px; padding: 6px 9px; }
  .card { border-radius: 15px; }
  .shell { padding-bottom: 48px; }
}

/* 尊重系统"减少动态效果" */
@media (prefers-reduced-motion: reduce) {
  .star { animation: none !important; opacity: 0.35 !important; }
  * { transition-duration: 0.01ms !important; }
}

/* ============================================================================
   首次使用引导：粉色星点镂空高亮 + 气泡说明
   只做一件事——把某块界面圈出来讲两句，然后记住"这个功能看过了"。
   ========================================================================= */
#guide-layer {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
}

.guide-spot {
  position: fixed;
  border-radius: 16px;
  /* 用超大 spread 的阴影当遮罩，中间自然镂空，不需要额外挖洞元素 */
  box-shadow:
    0 0 0 9999px rgba(6, 24, 42, 0.62),
    0 0 0 2px var(--pink-400),
    0 0 26px rgba(244, 114, 182, 0.55);
  transition: left .32s cubic-bezier(.4, 0, .2, 1), top .32s cubic-bezier(.4, 0, .2, 1),
              width .32s cubic-bezier(.4, 0, .2, 1), height .32s cubic-bezier(.4, 0, .2, 1);
}

.guide-tip {
  position: fixed;
  width: min(304px, calc(100vw - 28px));
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: var(--shadow-lift);
  pointer-events: auto;
  transition: left .32s cubic-bezier(.4, 0, .2, 1), top .32s cubic-bezier(.4, 0, .2, 1);
  animation: guideIn .26s ease;
}
@keyframes guideIn {
  from { opacity: 0; transform: translateY(6px) scale(.97); }
  to   { opacity: 1; transform: none; }
}

.guide-tip h4 {
  font-size: 14.5px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--ink);
}
.guide-tip h4::before {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--pink-400);
  clip-path: polygon(50% 0%, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0% 50%, 39% 39%);
  filter: drop-shadow(0 0 5px var(--pink-400));
}
.guide-tip p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 7px 0 12px;
}
.guide-actions { display: flex; align-items: center; gap: 8px; }
.guide-step {
  margin-right: auto;
  font-size: 11.5px;
  color: var(--ink-soft);
  letter-spacing: .5px;
}
.guide-actions button {
  font: inherit;
  font-size: 12.5px;
  padding: 6px 12px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.guide-actions button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(236, 72, 153, .3);
}