/* ============================================================
 * 东灵培智 · 设计系统 design.css
 * 莫兰迪配色 · 简洁高级：暖灰米底 · 鼠尾草绿 · 雾霾蓝 · 燕麦驼
 * ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色板（莫兰迪低饱和） */
  --bg-0: #eeebe4;            /* 页面底：暖灰米 */
  --bg-1: #e6e2d9;            /* 次级背景 */
  --bg-2: #dcd7cb;            /* 卡片深底 */
  --bg-3: #d2ccc0;            /* 悬浮/高亮 */
  --card: rgba(255, 255, 255, 0.55);      /* 米白玻璃卡 */
  --card-strong: rgba(255, 255, 255, 0.78);
  --border: rgba(148, 138, 116, 0.28);
  --border-soft: rgba(120, 113, 98, 0.14);

  /* 主色：燕麦驼（莫兰迪金） */
  --gold: #b3a07f;
  --gold-bright: #c3b393;
  --gold-deep: #95855f;
  --gold-glow: rgba(179, 160, 127, 0.28);

  /* 辅色：雾霾蓝 */
  --accent: #8b9dad;
  --accent-soft: rgba(139, 157, 173, 0.2);

  /* 语义色（莫兰迪化） */
  --ok: #8fa884;
  --warn: #c4a86e;
  --danger: #c0836f;
  --info: #8fa3b8;

  /* 文字 */
  --text: #3f3c36;
  --text-dim: #6b675e;
  --text-faint: #9a958a;

  /* 字体 */
  --font-serif: "Noto Serif SC", "Songti SC", "STSongti-SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* 圆角/阴影/动效 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --shadow-sm: 0 2px 14px rgba(90, 84, 70, 0.08);
  --shadow-md: 0 10px 34px rgba(90, 84, 70, 0.12);
  --shadow-gold: 0 4px 20px rgba(179, 160, 127, 0.18);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.35s;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(139, 157, 173, 0.1), transparent 60%),
    radial-gradient(900px 450px at 8% 110%, rgba(179, 160, 127, 0.09), transparent 55%),
    var(--bg-0);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(179, 160, 127, 0.3); }

/* 纹理背景层（浅色极淡噪点） */
.stars {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(100, 95, 82, 0.12) 50%, transparent 51%),
    radial-gradient(1px 1px at 40% 70%, rgba(100, 95, 82, 0.08) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 60% 20%, rgba(100, 95, 82, 0.1) 50%, transparent 51%),
    radial-gradient(1px 1px at 75% 55%, rgba(100, 95, 82, 0.07) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 90% 80%, rgba(100, 95, 82, 0.1) 50%, transparent 51%),
    radial-gradient(1px 1px at 10% 85%, rgba(100, 95, 82, 0.08) 50%, transparent 51%);
  background-size: 320px 320px;
  opacity: 0.6;
}

/* ---------- 导航栏 ---------- */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(238, 235, 228, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-soft);
}
.topnav .nav-inner {
  max-width: 1140px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 28px; height: 62px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  font-family: var(--font-serif); font-size: 19px; font-weight: 700;
  letter-spacing: 2px;
}
.nav-brand .seal {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #faf8f2; box-shadow: var(--shadow-gold);
}
.nav-links { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-dim); text-decoration: none;
  font-size: 14px; padding: 7px 14px; border-radius: 999px;
  transition: all var(--dur) var(--ease);
}
.nav-links a:hover { color: var(--gold-deep); background: rgba(179, 160, 127, 0.14); }
.nav-links a.active { color: var(--gold-deep); background: rgba(179, 160, 127, 0.18); font-weight: 600; }
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---------- 布局 ---------- */
.page { max-width: 1140px; margin: 0 auto; padding: 40px 24px 80px; }
.page-narrow { max-width: 860px; }

/* ---------- 标题 ---------- */
.page-head { text-align: center; margin-bottom: 40px; }
.page-head .kicker {
  display: inline-block; font-size: 12px; letter-spacing: 4px;
  color: var(--gold-deep); text-transform: uppercase;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 5px 16px; margin-bottom: 16px;
  background: rgba(179, 160, 127, 0.1);
}
.page-head h1 {
  font-family: var(--font-serif); font-size: clamp(30px, 5vw, 44px);
  font-weight: 700; letter-spacing: 4px; color: var(--text);
  margin-bottom: 10px;
}
.page-head p { color: var(--text-dim); font-size: 15px; max-width: 560px; margin: 0 auto; }

.section-title {
  font-family: var(--font-serif); font-size: 17px; font-weight: 700;
  color: var(--gold-deep); letter-spacing: 3px;
  margin: 28px 0 14px; display: flex; align-items: center; gap: 12px;
}
.section-title::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 28px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { border-color: var(--border); }

/* ---------- 表单 ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}
.field label {
  display: block; font-size: 13px; color: var(--text-dim);
  margin-bottom: 7px; font-weight: 600; letter-spacing: 0.5px;
}
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-soft); border-radius: var(--r-sm);
  color: var(--text); font-size: 14px; font-family: inherit;
  outline: none; transition: all var(--dur) var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--gold); background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 3px rgba(179, 160, 127, 0.15);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field textarea { min-height: 76px; resize: vertical; }
.hint { font-size: 12px; color: var(--text-faint); margin-top: 7px; line-height: 1.6; }

/* 标签选择器 */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.tag-pill {
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid var(--border-soft); background: rgba(255, 255, 255, 0.5);
  font-size: 13px; color: var(--text-dim); cursor: pointer;
  transition: all var(--dur) var(--ease); user-select: none;
}
.tag-pill:hover { border-color: var(--gold); color: var(--gold-deep); }
.tag-pill.active {
  background: rgba(179, 160, 127, 0.22);
  border-color: var(--gold); color: var(--gold-deep); font-weight: 600;
}

/* ---------- 按钮 ---------- */
.btn {
  width: 100%; margin-top: 20px; padding: 14px;
  border: none; border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #faf8f2; font-size: 16px; font-weight: 700; letter-spacing: 3px;
  cursor: pointer; transition: all var(--dur) var(--ease);
  box-shadow: var(--shadow-gold);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(179, 160, 127, 0.32); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }
.btn-ghost {
  background: transparent; color: var(--text-dim);
  border: 1px solid var(--border-soft); box-shadow: none;
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-deep); box-shadow: none; }

/* ---------- 加载 / 进度 ---------- */
.loading { text-align: center; padding: 36px 0; display: none; }
.spinner {
  width: 44px; height: 44px; margin: 0 auto 16px;
  border: 3px solid rgba(179, 160, 127, 0.2);
  border-top-color: var(--gold); border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.progress-bar {
  height: 8px; background: rgba(120, 113, 98, 0.14);
  border-radius: 99px; overflow: hidden; margin: 16px 0 12px;
}
.progress-bar .fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-bright));
  border-radius: 99px; transition: width 0.5s var(--ease);
}
.step-text { text-align: center; color: var(--text-dim); font-size: 13px; letter-spacing: 1px; }

/* ---------- 错误 ---------- */
#error {
  display: none; background: rgba(192, 131, 111, 0.1);
  border: 1px solid rgba(192, 131, 111, 0.35);
  color: #a05240; padding: 14px 18px; border-radius: var(--r-md);
  margin-bottom: 16px; font-size: 14px;
}

/* ---------- 徽章 / 芯片 ---------- */
.chip {
  background: rgba(179, 160, 127, 0.12);
  border: 1px solid var(--border);
  color: var(--gold-deep); padding: 6px 14px;
  border-radius: 999px; font-size: 13px; font-weight: 600;
  display: inline-block;
}
.chip.hl { background: linear-gradient(135deg, var(--gold), var(--gold-deep)); color: #faf8f2; border: none; }
.chart-header { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }

/* ---------- 页脚 ---------- */
footer {
  text-align: center; color: var(--text-faint); font-size: 12px;
  padding: 30px 20px 40px; letter-spacing: 1px;
  border-top: 1px solid var(--border-soft);
}
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--gold-deep); }

/* ---------- 动作行 ---------- */
.actions { margin-top: 16px; display: flex; gap: 10px; }
.actions button {
  flex: 1; padding: 11px; border-radius: var(--r-sm);
  border: 1px solid var(--border-soft); background: rgba(255, 255, 255, 0.5);
  color: var(--text-dim); cursor: pointer; font-size: 14px;
  transition: all var(--dur) var(--ease);
}
.actions button:hover { border-color: var(--gold); color: var(--gold-deep); }

/* ---------- 动画 ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.6s var(--ease) both; }
.d1 { animation-delay: 0.05s; } .d2 { animation-delay: 0.12s; }
.d3 { animation-delay: 0.2s; } .d4 { animation-delay: 0.28s; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .card { padding: 20px; border-radius: var(--r-md); }
  .page { padding: 28px 16px 60px; }
}