:root {
  --c-bg: #f4f6fb;
  --c-card: #ffffff;
  --c-primary: #5b6cff;
  --c-primary-2: #8a5bff;
  --c-accent: #ff8a3d;
  --c-text: #1f2440;
  --c-sub: #8a90a8;
  --c-line: #e8ebf5;
  --radius: 18px;
  --shadow: 0 6px 22px rgba(40, 50, 110, 0.08);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
}
.app { max-width: 480px; margin: 0 auto; min-height: 100vh; background: var(--c-bg); position: relative; }

/* 顶部 */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: linear-gradient(120deg, var(--c-primary), var(--c-primary-2));
  color: #fff; padding: 14px 18px;
  display: flex; align-items: center; justify-content: space-between;
}
.topbar h1 { font-size: 18px; margin: 0; font-weight: 700; }
.topbar .avatar { width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,.25); display: flex; align-items: center; justify-content: center; font-size: 18px; }

/* 内容区 */
.content { padding: 16px 16px 90px; }

/* 卡片 */
.card {
  background: var(--c-card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--c-sub); font-size: 14px; line-height: 1.5; }

/* 底部导航 */
.tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 480px;
  background: #fff; border-top: 1px solid var(--c-line);
  display: flex; z-index: 30;
}
.tabbar .tab {
  flex: 1; text-align: center; padding: 8px 2px 10px;
  color: var(--c-sub); font-size: 11px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  user-select: none;
}
.tabbar .tab .ico { font-size: 20px; line-height: 1; }
.tabbar .tab.active { color: var(--c-primary); font-weight: 700; }

/* 按钮 */
.btn {
  display: inline-block; border: none; border-radius: 999px;
  padding: 11px 18px; font-size: 15px; font-weight: 600; cursor: pointer;
  background: linear-gradient(120deg, var(--c-primary), var(--c-primary-2));
  color: #fff; box-shadow: var(--shadow);
}
.btn.ghost { background: #fff; color: var(--c-primary); border: 1px solid var(--c-primary); box-shadow: none; }
.btn.block { display: block; width: 100%; text-align: center; }

/* 聊天 */
.chat-box { display: flex; flex-direction: column; gap: 10px; min-height: 40vh; }
.chat-art { margin: 22px auto 6px; max-width: 320px; width: 92%; }
.chat-art svg { width: 100%; height: auto; display: block; }
/* 插画里的六个模块图标 = 可点击热区 */
.chat-art .art-mod { cursor: pointer; -webkit-tap-highlight-color: transparent; transition: transform 0.12s ease, opacity 0.12s ease; transform-box: fill-box; transform-origin: center; }
.chat-art .art-mod:active { transform: scale(0.92); opacity: 0.75; }
.msg { max-width: 80%; padding: 10px 13px; border-radius: 16px; line-height: 1.5; font-size: 15px; }
.msg.ai { background: #eef0ff; color: var(--c-text); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.me { background: linear-gradient(120deg, var(--c-primary), var(--c-primary-2)); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-input { position: fixed; bottom: 64px; left: 50%; transform: translateX(-50%); width: 100%; max-width: 480px; background: #fff; padding: 8px 10px; display: flex; gap: 8px; border-top: 1px solid var(--c-line); }
.chat-input input { flex: 1; border: 1px solid var(--c-line); border-radius: 999px; padding: 10px 14px; font-size: 15px; outline: none; }
.chat-input button { border: none; background: var(--c-primary); color: #fff; border-radius: 999px; padding: 0 16px; font-size: 15px; }

/* 占位模块 */
.placeholder { text-align: center; padding: 40px 16px; }
.placeholder .big { font-size: 54px; margin-bottom: 14px; }
.placeholder h2 { margin: 0 0 8px; }
.placeholder p { color: var(--c-sub); }

/* 看板图表 */
.bar-row { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-size: 13px; }
.bar-row .label { width: 56px; color: var(--c-sub); }
.bar-row .track { flex: 1; height: 12px; background: var(--c-line); border-radius: 999px; overflow: hidden; }
.bar-row .fill { height: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-primary-2)); }
.bar-row .val { width: 46px; text-align: right; color: var(--c-text); }

.stat-grid { display: flex; gap: 10px; }
.stat-grid .cell { flex: 1; background: var(--c-card); border-radius: 14px; padding: 14px; text-align: center; box-shadow: var(--shadow); }
.stat-grid .cell .num { font-size: 22px; font-weight: 800; color: var(--c-primary); }
.stat-grid .cell .cap { font-size: 12px; color: var(--c-sub); margin-top: 2px; }

.log-item { font-size: 13px; padding: 8px 0; border-bottom: 1px dashed var(--c-line); display: flex; justify-content: space-between; color: var(--c-sub); }
.log-item .m { color: var(--c-text); }

.warn { background: #fff4ec; border: 1px solid #ffd2b3; color: #c2560b; padding: 10px 12px; border-radius: 12px; font-size: 13px; margin-bottom: 12px; }