/* ============ 星屿·心声墙 ============ */
:root {
  --bg-top: #1b1e3a;
  --bg-bottom: #2d3a5f;
  --card-bg: rgba(255, 255, 255, 0.94);
  --accent: #f5b8a9;
  --accent-deep: #e88f7d;
  --lavender: #b7a6e3;
  --star: #ffe9c7;
  --text: #3d3a52;
  --text-soft: #7a7694;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(15, 18, 45, 0.25);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: linear-gradient(175deg, var(--bg-top) 0%, var(--bg-bottom) 55%, #46557e 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
}

/* ---------- 星空背景 ---------- */
.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.stars { position: absolute; inset: 0; }

.star-dot {
  position: absolute;
  border-radius: 50%;
  background: var(--star);
  opacity: 0.7;
  animation: twinkle 3s ease-in-out infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.25; transform: scale(0.8); }
  50% { opacity: 0.9; transform: scale(1.1); }
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}

.glow-1 {
  width: 480px; height: 480px;
  background: #6d5fae;
  top: -140px; right: -100px;
}

.glow-2 {
  width: 400px; height: 400px;
  background: #e88f7d;
  bottom: -160px; left: -120px;
  opacity: 0.22;
}

/* ---------- 布局 ---------- */
.container {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 20px 48px;
}

/* ---------- 顶部 ---------- */
.hero { text-align: center; color: #fff; margin-bottom: 36px; }

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--star);
  border: 1px solid rgba(255, 233, 199, 0.35);
  border-radius: 999px;
  padding: 5px 18px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(28px, 5.5vw, 42px);
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.35;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

.hero-sub {
  margin-top: 16px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 表单卡片 ---------- */
.form-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 26px 22px;
  margin-bottom: 44px;
}

.field { display: block; margin-bottom: 18px; }

.field-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

input[type="text"],
textarea {
  width: 100%;
  border: 1.5px solid #e3e0ef;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: #faf9fc;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--lavender);
  box-shadow: 0 0 0 3px rgba(183, 166, 227, 0.22);
}

textarea { resize: vertical; min-height: 110px; }

.char-count {
  display: block;
  text-align: right;
  font-size: 12px;
  color: var(--text-soft);
  margin-top: 6px;
}

.btn-primary {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #fff;
  background: linear-gradient(120deg, var(--accent-deep), var(--lavender));
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  box-shadow: 0 8px 20px rgba(232, 143, 125, 0.35);
}

.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(232, 143, 125, 0.45); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-tip {
  margin-top: 14px;
  font-size: 14px;
  text-align: center;
  min-height: 20px;
}

.form-tip.ok { color: #3f9d6e; }
.form-tip.err { color: #d76a5b; }

.hotline {
  margin-top: 18px;
  padding: 12px 14px;
  background: #fdf3ef;
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  font-size: 13px;
  color: #9c6a5e;
}

.hotline strong { color: #c25b48; }

/* ---------- 留言墙 ---------- */
.wall-section { margin-bottom: 40px; }

.wall-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  color: #fff;
  margin-bottom: 20px;
}

.wall-header h2 { font-size: 22px; letter-spacing: 2px; }

.wall-count { font-size: 13px; color: rgba(255, 255, 255, 0.6); }

.wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.wall-loading {
  grid-column: 1 / -1;
  text-align: center;
  color: rgba(255, 255, 255, 0.65);
  padding: 40px 0;
  font-size: 14px;
}

.wall-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: rgba(255, 255, 255, 0.65);
  padding: 40px 0;
  font-size: 14px;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 20px 18px;
  box-shadow: 0 6px 18px rgba(15, 18, 45, 0.18);
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: rise 0.5s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-content { font-size: 15px; word-break: break-word; flex: 1; }

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-soft);
}

.card-nickname {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--accent-deep);
}

.card-nickname::before { content: "✦"; font-size: 10px; }

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
  margin-top: 20px;
}

.admin-link { color: rgba(255, 255, 255, 0.45); text-decoration: underline; }
.admin-link:hover { color: rgba(255, 255, 255, 0.8); }

/* ---------- 响应式 ---------- */
@media (max-width: 520px) {
  .container { padding-top: 40px; }
  .form-card { padding: 22px 18px 18px; }
  .wall { grid-template-columns: 1fr; }
}