/* =========================================================
   大乐透 AI 娱乐分析助手 · 视觉样式 v1.1
   纯 CSS · 移动优先 · 无框架/无构建
   主题：品牌紫(#6d28d9) / 前区红(#e23b3b) / 后区蓝(#2f6fed)
   ========================================================= */

:root {
  --bg: #f5f6fb;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --line: #eceef3;

  --accent: #6d28d9;        /* 品牌紫，与 favicon / theme-color 一致 */
  --accent-deep: #4c1d95;
  --accent-soft: #f3eefe;
  --accent-line: #e4d8fb;

  --front: #e23b3b;         /* 前区：红 */
  --back: #2f6fed;          /* 后区：蓝 */

  --warn: #b45309;
  --warn-bg: #fff7ed;
  --warn-line: #fed7aa;

  --shadow: 0 1px 2px rgba(17,24,39,.04), 0 8px 22px rgba(17,24,39,.06);
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;           /* 兜底：杜绝小屏横向滚动 */
}
html { scroll-behavior: smooth; }

/* ===================== 头部品牌区 ===================== */
.site-header {
  text-align: center;
  padding: calc(32px + env(safe-area-inset-top, 0px)) 16px 18px;
  background:
    radial-gradient(130% 120% at 50% -10%, var(--accent-soft) 0%, rgba(243,238,254,0) 70%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}
.brand h1 {
  font-size: 1.6rem;
  margin: 0 0 6px;
  letter-spacing: .5px;
  color: var(--accent-deep);
  font-weight: 800;
}
.brand-tag {
  color: var(--muted);
  font-size: .92rem;
  margin: 0;
}
.subtitle {
  color: var(--muted);
  font-size: .9rem;
  margin: 0;
}
.risk-banner {
  max-width: 720px;
  margin: 16px auto 0;
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-left: 4px solid #f59e0b;
  color: #92400e;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: .85rem;
  line-height: 1.55;
  text-align: left;
}
.risk-banner strong { color: var(--warn); }

/* ===================== 主容器 ===================== */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 8px 14px 28px;
}

/* ===================== 卡片 ===================== */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 18px 20px;
  margin: 16px 0;
}
.card h2 {
  font-size: 1.08rem;
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--accent);
  color: var(--accent-deep);
  font-weight: 700;
}

/* ① 产品介绍（hero 卡） */
.section-intro {
  background: linear-gradient(135deg, #faf5ff 0%, #ffffff 72%);
  border-color: var(--accent-line);
}
.section-intro h2 { border-left-color: var(--accent); }
.section-intro p { font-size: .92rem; margin: 8px 0; }
.intro-list,
.report-links {
  margin: 12px 0 4px;
  padding-left: 20px;
}
.intro-list li,
.report-links li {
  margin: 7px 0;
  font-size: .92rem;
  line-height: 1.6;
}
.report-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  display: inline-block;        /* touch 友好：扩大命中区域 */
  padding: 8px 6px;
  margin: -8px -6px;
}
.report-links a:hover { text-decoration: underline; }

/* ===================== ② 数据覆盖卡（移动端首屏重点） ===================== */
.cover-card { text-align: center; }
.cover-card h2 {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-left: none;
  padding-left: 0;
  margin-bottom: 6px;
}
.cover-count {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  margin: 6px 0 2px;
}
.cover-count .cover-unit {
  font-size: 1.2rem;
  color: var(--muted);
  margin-left: 6px;
  font-weight: 600;
}
.cover-desc {
  color: var(--muted);
  font-size: .95rem;
  margin: 4px 0 10px;
}
.cover-range {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  margin: 2px 0;
  font-variant-numeric: tabular-nums;
}
.cover-source {
  color: var(--muted);
  font-size: .88rem;
  margin: 4px 0 0;
}
.cover-card .subtitle {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.block { margin: 14px 0; }
.block h3 {
  font-size: .95rem;
  color: var(--muted);
  margin: 0 0 8px;
  font-weight: 600;
}
.hint {
  font-size: .82rem;
  color: var(--muted);
  margin: -4px 0 12px;
}

/* ===================== 号码球 ===================== */
.ball {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
  margin: 3px;
  box-shadow: inset 0 -2px 4px rgba(0,0,0,.12);
}
.ball.front { background: var(--front); }
.ball.back  { background: var(--back); }

/* ===================== 排行榜 ===================== */
.rank-list { display: flex; flex-wrap: wrap; gap: 6px 10px; }
.rank-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f3f4f6;
  border-radius: 999px;
  padding: 4px 10px 4px 4px;
  font-size: .85rem;
}
.rank-item .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
}
.rank-item .num.front { background: var(--front); }
.rank-item .num.back  { background: var(--back); }
.rank-item .cnt { color: var(--muted); }
.rank-item .omit { color: var(--warn); font-weight: 600; }

/* ===================== 条形图 ===================== */
.bars { display: flex; flex-direction: column; gap: 7px; }
.bar-row { display: flex; align-items: center; gap: 8px; font-size: .85rem; }
.bar-label { width: 64px; flex: none; color: var(--muted); }
.bar-track {
  flex: 1;
  background: #eef1f6;
  border-radius: 6px;
  height: 16px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #8b5cf6 100%);
  border-radius: 6px;
  transition: width .3s ease;
}
.bar-val { width: 56px; flex: none; text-align: right; color: var(--muted); }

.metric-line { font-size: .95rem; margin: 4px 0; }
.metric-line strong { color: var(--accent); font-size: 1.05rem; }

/* ===================== 推荐卡片 ===================== */
.rec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 560px) {
  .rec-grid { grid-template-columns: repeat(3, 1fr); }
}
.rec-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  background: #fff;
  transition: transform .15s ease, box-shadow .15s ease;
}
.rec-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(109,40,217,.12);
}
.rec-card h4 { margin: 0 0 4px; font-size: .95rem; color: var(--accent-deep); }
.rec-card .tag { color: var(--muted); font-size: .78rem; display: block; margin-bottom: 8px; }
.rec-card .grp { margin: 6px 0; }
.rec-card .grp span.lbl { font-size: .75rem; color: var(--muted); display: block; }

/* ===================== 免责声明 ===================== */
.disclaimer {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
}
.disclaimer h2 { border-left-color: var(--warn); color: var(--warn); }
.disclaimer p { font-size: .88rem; margin: 6px 0; color: #7c4a03; }

/* ===================== 错误 ===================== */
.error-box {
  max-width: 720px;
  margin: 20px auto;
  background: #fff5f5;
  border: 1px solid #fecaca;
  color: #9b1c1c;
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.error-detail { font-size: .8rem; color: #b91c1c; word-break: break-all; }
.error-hint { font-size: .82rem; color: var(--muted); }

/* ===================== 页脚 ===================== */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: .8rem;
  padding: 16px 0 calc(8px + env(safe-area-inset-bottom, 0px));
}

/* ===================== ① 最新开奖结果（v1.3 置顶核心卡） ===================== */
.latest-result {
  text-align: center;
  background: linear-gradient(150deg, #faf5ff 0%, #ffffff 74%);
  border-color: var(--accent-line);
}
.latest-result h2 {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-left: none;
  padding-left: 0;
  margin-bottom: 8px;
}
.latest-meta {
  color: var(--muted);
  font-size: .92rem;
  margin: 4px 0 12px;
}
.latest-meta strong { color: var(--text); font-weight: 700; }
.latest-balls { margin: 6px 0 2px; }
.grp-label {
  display: block;
  font-size: .78rem;
  color: var(--muted);
  margin: 10px 0 4px;
  letter-spacing: 2px;
}
.ball-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.latest-result .ball {
  width: 38px;
  height: 38px;
  font-size: 1rem;
  margin: 0;
}
.latest-result .ball-row { gap: 8px; }

/* ===================== ④ 数据统计：子区层级 ===================== */
.stats-sub {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.stats-sub:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.stats-sub h3 {
  font-size: 1rem;
  color: var(--accent-deep);
  margin: 0 0 10px;
  font-weight: 700;
}
.block h4 {
  font-size: .9rem;
  color: var(--muted);
  margin: 0 0 8px;
  font-weight: 600;
}

/* ===================== 小屏（≤400px）微调：球尺寸 / 条形图 / 层级 ===================== */
@media (max-width: 400px) {
  .ball {
    width: 28px;
    height: 28px;
    font-size: .78rem;
    margin: 2px;
  }
  .latest-result .ball {
    width: 32px;
    height: 32px;
    font-size: .88rem;
    margin: 0;
  }
  .rec-card { padding: 10px 8px; }
  .rec-card h4 { font-size: .9rem; }
  .bar-label { width: 56px; }
  .bar-val { width: 48px; }
  .brand h1 { font-size: 1.45rem; }
  main { padding-left: 12px; padding-right: 12px; }
  .card { padding: 14px 14px 16px; }
}

code {
  background: #eef1f6;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: .82em;
}

/* ===================== 大屏微调 ===================== */
@media (min-width: 760px) {
  .brand h1 { font-size: 1.85rem; }
  .card { padding: 20px 22px 22px; }
}