/* ============================================================
 * css/rules.css — 平台规则页（#/rules）
 * 作用域限定在 .rule-page 下，避免影响其它页面。
 * 目标：320/390/430 无横向溢出；表格在窄屏可横向滚动而不挤压正文；
 *       目录与折叠块保持不小于 44px 的触控高度。
 * ============================================================ */
.rule-page { padding: 0 14px 32px; color: var(--ink); overflow-x: hidden; }
.rule-page * { box-sizing: border-box; }

.rule-hero { margin: 10px 0 14px; padding: 18px 18px 16px; border-radius: 18px;
  background: linear-gradient(145deg, #002080, #002a6e); color: #fff; }
.rule-hero h1 { margin: 0 0 6px; font-size: 21px; line-height: 1.3; }
.rule-hero p { margin: 0; font-size: 13px; line-height: 1.65; color: rgba(255, 255, 255, .86); }
.rule-hero-src { margin-top: 6px !important; font-size: 12px !important; color: rgba(255, 255, 255, .7) !important; }

/* ---- 分类目录 ---- */
.rule-toc { margin: 0 0 16px; padding: 14px 14px 6px; border: 1px solid var(--line);
  border-radius: 16px; background: var(--card); box-shadow: var(--shadow-card); }
.rule-toc-title { display: block; margin-bottom: 8px; color: var(--ink-3); font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.rule-toc ol { margin: 0; padding: 0; list-style: none; }
.rule-toc li { border-top: 1px solid var(--line); }
.rule-toc li:first-child { border-top: 0; }
.rule-toc a { display: flex; flex-direction: column; gap: 2px; min-height: 48px;
  padding: 9px 2px; color: var(--ink); text-decoration: none; }
.rule-toc a:active { background: #f6f8fc; }
.rule-toc b { font-size: 15px; }
.rule-toc small { color: var(--ink-3); font-size: 12px; line-height: 1.45; overflow-wrap: anywhere; }

/* ---- 分类折叠块 ---- */
.rule-sec { margin: 0 0 12px; border: 1px solid var(--line); border-radius: 16px;
  background: var(--card); box-shadow: var(--shadow-card); overflow: hidden; }
.rule-sec > summary { display: flex; align-items: baseline; gap: 9px; flex-wrap: wrap;
  min-height: 52px; padding: 12px 14px; cursor: pointer; list-style: none; }
.rule-sec > summary::-webkit-details-marker { display: none; }
.rule-sec > summary::after { content: '›'; margin-left: auto; color: var(--ink-3); font: normal 20px/1 sans-serif;
  transform: rotate(90deg); transition: transform .18s ease; }
.rule-sec[open] > summary::after { transform: rotate(-90deg); }
.rule-sec-no { flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--felt-600); color: #fff;
  font: 700 12px/22px inherit; text-align: center; }
.rule-sec-title { font-size: 16px; font-weight: 700; }
.rule-sec-hint { flex-basis: 100%; color: var(--ink-3); font-size: 12px; line-height: 1.45; overflow-wrap: anywhere; }
.rule-appendix .rule-sec-no { background: var(--ink-3); }
.rule-body { padding: 2px 14px 16px; }
.rule-body p { margin: 0 0 10px; font-size: 14px; line-height: 1.75; overflow-wrap: anywhere; }
.rule-body h4 { margin: 14px 0 7px; font-size: 14px; color: var(--ink-2); }
.rule-note { margin-top: 4px !important; padding: 9px 11px; border-radius: 10px; background: var(--card-soft);
  color: var(--ink-3); font-size: 12.5px; line-height: 1.65; }
.rule-badge { padding: 9px 11px; border-radius: 10px; background: #fff6e6; color: #8a5b00;
  font-size: 12.5px; line-height: 1.65; }

/* ---- 术语与步骤 ---- */
.rule-terms { margin: 0 0 10px; padding: 0; list-style: none; }
.rule-terms li { padding: 9px 0; border-bottom: 1px solid var(--line); }
.rule-terms li:last-child { border-bottom: 0; }
.rule-terms b { display: block; margin-bottom: 2px; font-size: 14px; }
.rule-terms span { color: var(--ink-3); font-size: 13px; line-height: 1.65; overflow-wrap: anywhere; }
.rule-steps { margin: 0 0 10px; padding-left: 20px; }
.rule-steps li { margin-bottom: 6px; font-size: 14px; line-height: 1.75; overflow-wrap: anywhere; }

/* ---- 表格：窄屏横向滚动，不挤压正文 ---- */
.rule-table-wrap { margin: 0 0 10px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.rule-table { width: 100%; min-width: 260px; border-collapse: collapse; font-size: 13px; }
.rule-table th, .rule-table td { padding: 8px 10px; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--line); line-height: 1.6; overflow-wrap: anywhere; }
.rule-table th { color: var(--ink-3); font-weight: 700; font-size: 12px; white-space: nowrap; }
.rule-table tr:last-child td { border-bottom: 0; }

.rule-foot { margin: 6px 2px 0; color: var(--ink-3); font-size: 11.5px; line-height: 1.7; }

/* ---- 窄屏收紧，保证不横向溢出 ---- */
@media (max-width: 340px) {
  .rule-page { padding-left: 11px; padding-right: 11px; }
  .rule-hero { padding: 15px 14px 13px; }
  .rule-hero h1 { font-size: 19px; }
  .rule-body { padding-left: 11px; padding-right: 11px; }
  .rule-table { font-size: 12.5px; }
}

/* ---- 宽视口：保持与 390 相同的信息密度，不拉成大色块 ---- */
@media (min-width: 431px) {
  .rule-page { width: min(620px, 100%); margin: 0 auto; }
}

/* ---- 目录项：页内跳转按钮（非链接，避免给出无效深链承诺） ---- */
.rule-toc-item { display: flex; flex-direction: column; gap: 2px; width: 100%; min-height: 48px;
  padding: 9px 2px; border: 0; background: transparent; color: var(--ink);
  font: inherit; text-align: left; cursor: pointer; }
.rule-toc-item:active { background: #f6f8fc; }
.rule-toc-item b { font-size: 15px; }
.rule-toc-item small { color: var(--ink-3); font-size: 12px; line-height: 1.45; overflow-wrap: anywhere; }