/* ============================================================
   轨交视界 · 资料站  公共样式
   风格：老式学校网站 —— 深蓝标题栏 / 细线框 / 宋体正文 /
         蓝色下划线链接 / 方角无阴影 / 表格感目录
   前台 index.html 和所有栏目共用这一份
   ============================================================ */

:root {
  --navy: #123c74;        /* 深蓝：顶栏、栏目标题 */
  --link: #003399;        /* 链接蓝 */
  --line: #a8b8d0;        /* 主细线框 */
  --line-light: #c8d4e6;  /* 淡线 */
  --head-bg: #e6edf7;     /* 栏目标题底色 */
  --soft: #f2f6fc;        /* 浅底 */
  --ink: #222;
  --gray: #555;
  --bg: #e7ebf1;          /* 页面外侧底色 */
  --white: #fff;
  --red: #b00000;
  --green: #0a6b2d;
}

* { box-sizing: border-box; }

html { scroll-behavior: auto; }

body {
  margin: 0;
  font-family: "SimSun", "宋体", "Noto Serif CJK SC", "Songti SC", serif;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--link); text-decoration: underline; }
a:hover { color: #c00; }

/* ---------- 顶栏：一条深蓝色标题栏 ---------- */
.topbar {
  background: var(--navy);
  border-bottom: 3px solid #8aa8d8;
}
.topbar-inner {
  max-width: 1000px; margin: 0 auto; padding: 0 12px;
  display: flex; align-items: center; gap: 16px;
  min-height: 56px; flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 20px; font-weight: bold; color: #fff;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
  letter-spacing: 1px; white-space: nowrap; text-decoration: none;
}
.brand:hover { color: #fff; text-decoration: none; }
/* 顶栏 logo：白色衬底，深蓝图形放在深蓝顶栏上才看得清 */
.brand .logo-img {
  height: 44px; width: auto; display: block;
  background: #fff; border: 1px solid #fff;
}
.nav { display: flex; flex-wrap: wrap; margin-left: auto; gap: 0; }
.nav a {
  display: block; padding: 9px 11px;
  color: #fff; font-size: 14px; font-weight: bold; text-decoration: none;
  border-left: 1px solid rgba(255,255,255,.22);
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
  white-space: nowrap;
}
.nav a:hover { background: #2a5b9e; color: #fff; text-decoration: none; }
.nav a.on { background: #fff; color: var(--navy); font-weight: bold; }

/* ---------- 布局：居中白底，外面一圈细边框 ---------- */
.page {
  max-width: 1000px; margin: 12px auto 0; padding: 16px 18px 40px;
  background: #fff; border: 1px solid var(--line);
}

/* 首页标题区：像「本站简介」公告栏 */
.hero {
  background: var(--soft); border: 1px solid var(--line);
  padding: 16px 20px; margin-bottom: 20px;
}
.hero h1 {
  margin: 0 0 8px; font-size: 24px; color: var(--navy);
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--line-light); padding-bottom: 8px;
}
.hero p { margin: 0; font-size: 14px; color: #333; }
.hero .chips { margin-top: 10px; font-size: 13px; color: var(--link); }
.hero .chip { background: none; border: 0; padding: 0; font-size: 13px; }
.hero .chip + .chip::before { content: " ｜ "; color: #888; }

.section-title {
  font-size: 19px; font-weight: bold; color: var(--navy);
  margin: 0 0 4px; padding: 0 0 6px;
  border-bottom: 2px solid var(--navy);
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.section-title::before { content: "■ "; font-size: 13px; color: var(--navy); }
.section-desc { color: var(--gray); font-size: 13px; margin: 8px 0 18px; }

/* 首页栏目入口：带编号的方框目录 */
.entry-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px; margin: 18px 0 26px;
}
.entry {
  background: #fff; border: 1px solid var(--line);
  padding: 11px 13px; display: block; color: inherit; text-decoration: none;
}
.entry:hover { background: var(--soft); border-color: var(--navy); text-decoration: none; }
.entry .ico {
  display: inline-block; font-size: 12px; color: var(--navy); font-weight: bold;
  border: 1px solid var(--navy); padding: 0 5px; margin-bottom: 6px;
  font-family: "SimHei", "黑体", sans-serif;
}
.entry h3 {
  margin: 5px 0 4px; font-size: 15px; color: var(--link);
  text-decoration: underline;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.entry p { margin: 0; font-size: 12.5px; color: var(--gray); line-height: 1.6; }

/* ---------- 工具条 / 搜索 ---------- */
.toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  background: var(--head-bg); border: 1px solid var(--line);
  padding: 10px 12px; margin-bottom: 14px;
}
.toolbar .grow { flex: 1; min-width: 200px; }
/* 检索框前的字段名（第几册 / 层级 / 册数） */
.toolbar .lab {
  font-size: 14px; font-weight: bold; color: var(--navy); white-space: nowrap;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.toolbar .lab::after { content: "："; }
input[type=text], input[type=search], textarea, select, input[type=password], input[type=file] {
  width: 100%; padding: 6px 8px; font-size: 14px;
  border: 1px solid #7f8fa8; border-radius: 0;
  background: #fff; color: var(--ink); font-family: inherit; outline: none;
}
input[type=file] { padding: 5px; font-size: 13px; }
input:focus, textarea:focus, select:focus { border-color: var(--navy); background: #fffdf0; }
textarea { resize: vertical; min-height: 90px; }
label { display: block; font-size: 14px; font-weight: bold; margin: 0 0 5px; }
.field { margin-bottom: 14px; }
.hint { font-size: 12.5px; color: var(--gray); margin-top: 4px; }

/* ---------- 出版物搜索：紧贴搜索框的一行回话 + 命中字高亮 ---------- */
.search-stat {
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--navy);
  background: var(--soft);
  padding: 7px 10px; margin: -4px 0 12px;
  font-size: 13px; line-height: 1.8; color: var(--ink);
}
.search-stat b { color: var(--navy); }
.search-stat.ok { border-left-color: var(--green); background: #f3faf5; }
.search-stat.ok b { color: var(--green); }
.search-stat.none { border-left-color: var(--red); background: #fff7f7; }
.search-stat.none b { color: var(--red); }
.search-stat .bk { color: var(--link); font-weight: bold; }
.search-stat .hit, .card h4 .hit {
  background: #ffe680; color: var(--red); font-weight: bold;
  padding: 0 1px; border: 0;
}

/* 老式方角按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  padding: 5px 14px; font-size: 14px;
  border: 1px solid #7f8fa8; border-radius: 0;
  background: #eef2f8; color: var(--navy); cursor: pointer;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
  white-space: nowrap;
}
.btn:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn.ghost { background: #fff; color: var(--link); border-color: #a8b8d0; }
.btn.ghost:hover { background: var(--head-bg); color: var(--navy); }
.btn.soft { background: var(--head-bg); color: var(--navy); border-color: var(--line); }
.btn.soft:hover { background: var(--navy); color: #fff; }
.btn.orange { background: #fff3d6; border-color: #c9a227; color: #7a5a00; }
.btn.gray { background: #f0f0f0; color: #333; border-color: #aaa; }
.btn.sm { padding: 3px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.pill {
  padding: 4px 12px; border: 1px solid var(--line); background: #fff;
  font-size: 13px; cursor: pointer; user-select: none;
}
.pill.on { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- 分组：线框 + 浅蓝表头 ---------- */
.group { border: 1px solid var(--line); padding: 12px; margin-bottom: 18px; }
.group-head {
  display: flex; align-items: baseline; gap: 10px;
  background: var(--head-bg); border: 1px solid var(--line-light);
  border-left: 3px solid var(--navy);
  padding: 5px 10px; margin: 0 0 12px;
}
.group-head h3 {
  margin: 0; font-size: 15px; color: var(--navy);
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.group-head .sub { font-size: 12.5px; color: var(--gray); }

/* ---------- 分组折叠：点「入门 / 进阶」这一行，收起 / 展开下面的文件 ----------
   ▾ 展开（尖朝下，倒三角） → ▸ 收起（尖朝右，正三角），老式方框、无圆角 */
.fold-head { cursor: pointer; user-select: none; }
.fold-head:hover { background: #eef4fb; }
.fold-ico { display: inline-block; width: 1.1em; color: var(--navy); font-weight: bold; }
.fold-tip { font-size: 12.5px; color: var(--gray); font-weight: normal; margin-left: 8px; }
.fold-head.inner {
  font-weight: 700; color: #374151; margin: 10px 0 8px; padding: 5px 8px;
  border-left: 3px solid var(--navy); background: var(--head-bg);
}
.fold-head.inner .fold-tip { margin-left: 10px; }

.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px;
}
.card {
  background: #fff; border: 1px solid var(--line-light); padding: 10px;
  display: flex; flex-direction: column; gap: 6px;
}
.card .cover {
  height: 100px; border: 1px solid var(--line-light); background: var(--soft);
  display: grid; place-items: center; overflow: hidden;
  color: var(--navy); font-size: 13px; text-align: center;
}
.card .cover img { width: 100%; height: 100%; object-fit: cover; }
.card h4 { margin: 0; font-size: 14px; line-height: 1.5; color: var(--link); }
.card .meta { font-size: 12.5px; color: var(--gray); flex: 1; }
.card .desc { font-size: 13px; color: #444; }
.card .actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }

.book-info { font-size: 13px; color: #444; display: grid; gap: 3px; }
.book-info b { color: var(--ink); }

/* 文件列表：表格感的横线 + 斑马纹 */
.file-list { border: 1px solid var(--line); }
.file-row {
  background: #fff; border-bottom: 1px solid var(--line-light);
  padding: 8px 10px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.file-row:last-child { border-bottom: 0; }
.file-row:nth-child(even) { background: #fafbfd; }
.file-row .fname { font-weight: bold; flex: 1; min-width: 160px; }
.file-row .ftag { font-size: 12px; color: var(--gray); }
.file-row .actions { display: flex; gap: 6px; }

/* ---------- 状态提示 ---------- */
.empty {
  text-align: center; padding: 30px 16px; color: var(--gray);
  background: #fff; border: 1px dashed var(--line);
}
.empty .big { font-size: 16px; font-weight: bold; color: var(--ink); margin-bottom: 6px; }
.empty .emoji { display: none; }
.linkish { color: var(--link); cursor: pointer; text-decoration: underline; }

.notice {
  padding: 8px 12px; font-size: 13.5px; margin: 10px 0;
  background: var(--soft); color: var(--navy); border: 1px solid var(--line);
}
.notice.ok { background: #f0f8f0; color: var(--green); border-color: #9bc79b; }
.notice.err { background: #fdf0f0; color: var(--red); border-color: #d9a0a0; }
.notice.warn { background: #fff9e6; color: #7a5a00; border-color: #d6bf7a; }
[hidden] { display: none !important; }

.loading { text-align: center; padding: 40px; color: var(--gray); }

/* ---------- 首屏连接进度条：老式方框，无圆角、无动画 ---------- */
.boot-box {
  max-width: 520px; margin: 26px auto; padding: 18px 20px; text-align: center;
  background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--navy);
}
.boot-title { font-size: 16px; font-weight: bold; color: var(--navy); margin-bottom: 6px; }
.boot-sub { font-size: 13.5px; color: var(--gray); margin-bottom: 10px; min-height: 20px; }
.boot-track { height: 18px; background: #eef2f8; border: 1px solid var(--navy); padding: 2px; }
.boot-fill { height: 100%; width: 0; background: var(--navy); }
.boot-dots { display: flex; gap: 5px; justify-content: center; flex-wrap: wrap; margin-top: 11px; }
.boot-dots i { display: block; width: 24px; height: 11px; border: 1px solid var(--navy); background: #fff; }
.boot-dots i.done { background: var(--navy); }
.boot-dots i.now { background: #fff3d6; border-color: #b00000; }
.boot-hint { font-size: 12.5px; color: var(--gray); margin: 12px 0 0; line-height: 1.75; }
@media(max-width:700px){ .boot-box { margin: 16px 0; padding: 14px; } }

/* ---------- 弹窗预览：深蓝标题栏 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.5); display: grid; place-items: center; padding: 16px;
}
.modal-box {
  background: #fff; border: 2px solid var(--navy);
  width: min(880px, 100%); max-height: 90vh;
  display: flex; flex-direction: column; overflow: hidden;
}
.modal-head {
  background: var(--navy); color: #fff; padding: 8px 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.modal-head h3 { margin: 0; font-size: 15px; }
.modal-body { padding: 12px; overflow: auto; flex: 1; background: #fff; }
.modal-body iframe { width: 100%; height: 70vh; border: 1px solid var(--line); background: #fff; }
.modal-body img { max-width: 100%; display: block; margin: 0 auto; border: 1px solid var(--line-light); }
.modal-body pre {
  white-space: pre-wrap; word-break: break-word; background: #f7f7f7;
  padding: 12px; border: 1px solid var(--line); font-size: 13px;
}
.x-btn {
  background: #fff; color: var(--navy); border: 1px solid #fff;
  width: 26px; height: 26px; font-size: 16px; cursor: pointer; line-height: 1;
}

/* ---------- 点书名看书籍详细信息：老式两列表格 ---------- */
.bk-detail { width: 100%; border-collapse: collapse; font-size: 14px; background: #fff; }
.bk-detail th, .bk-detail td {
  border: 1px solid var(--line); padding: 8px 10px;
  text-align: left; vertical-align: top;
}
.bk-detail th {
  width: 92px; background: var(--head-bg); color: var(--navy);
  font-weight: bold; white-space: nowrap;
}
.bk-detail td { color: var(--ink); }
.bk-detail tr:first-child td {
  font-size: 15px; font-weight: bold; color: var(--navy); background: var(--soft);
}
@media(max-width:700px){ .bk-detail th { width: 72px; } }

/* ---------- 表单区 ---------- */
.panel { background: #fff; border: 1px solid var(--line); padding: 16px 18px; max-width: 680px; }
.panel h3 {
  margin: 0 0 14px; font-size: 15px; color: var(--navy);
  border-bottom: 1px solid var(--line-light); padding-bottom: 6px;
}
.radio-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.radio-card {
  border: 1px solid var(--line); padding: 6px 12px;
  cursor: pointer; font-size: 13.5px; background: #fff; user-select: none;
}
.radio-card.on { border-color: var(--navy); background: var(--navy); color: #fff; font-weight: bold; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

/* ---------- 关于我们 ---------- */
.about-block { margin-bottom: 18px; }
.about-block h3 {
  font-size: 15px; color: var(--navy); margin: 0 0 8px;
  padding-left: 8px; border-left: 3px solid var(--navy);
}
.about-block .txt {
  background: #fff; border: 1px solid var(--line); padding: 12px;
  white-space: pre-wrap; font-size: 14px;
}
.wechat-box {
  background: var(--soft); border: 1px solid var(--line); padding: 12px 16px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.wechat-box .code {
  font-size: 20px; font-weight: bold; color: var(--red); letter-spacing: 1px;
  font-family: "SimHei", "黑体", sans-serif;
}

/* ---------- 页脚 ---------- */
.footer {
  max-width: 1000px; margin: 12px auto 0; padding: 14px 16px 22px;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: #fff; text-align: center; font-size: 12.5px; color: var(--gray);
}
.footer .wx { color: var(--red); font-weight: bold; }
.footer .line { margin: 3px 0; }

/* ---------- 主页：滚动标语（一次只播一条） ---------- */
.slogan-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: #fffbe9; border: 1px solid var(--line);
  border-left: 3px solid var(--navy);
  padding: 8px 12px; margin: 0 0 14px;
}
.slogan-bar .lab {
  color: var(--red); font-weight: bold; white-space: nowrap; font-size: 13px;
  font-family: "SimHei", "黑体", sans-serif;
}
.slogan-bar .txt {
  flex: 1; min-width: 200px; color: var(--navy); font-weight: bold;
  font-size: 15px; line-height: 1.5;
}
.slogan-bar .txt.swap { animation: sloganIn .5s ease-out; }
@keyframes sloganIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}
.slogan-bar .dots {
  font-size: 12px; color: var(--gray); white-space: nowrap;
  font-family: "SimHei", "黑体", sans-serif;
}

/* ---------- 主页：铁路要闻 ---------- */
.news-box { border: 1px solid var(--line); margin: 0 0 18px; }
.news-box .hd {
  background: var(--head-bg); border-bottom: 1px solid var(--line-light);
  border-left: 3px solid var(--navy); padding: 5px 12px;
  color: var(--navy); font-weight: bold; font-size: 14px;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.news-box .bd {
  background: #fff; padding: 12px 14px; min-height: 44px;
  white-space: pre-wrap; word-break: break-word; font-size: 14px;
}

/* ---------- 主页：本站公告（后台拟定 / 发布后才显示） ----------
   跟「铁路要闻」同一套老式线框，只是表头用红边红字，更像一张贴出来的通知。 */
.notice-box { border: 1px solid var(--line); margin: 0 0 18px; }
.notice-box .hd {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  background: var(--head-bg); border-bottom: 1px solid var(--line-light);
  border-left: 3px solid var(--red); padding: 5px 12px;
  color: var(--red); font-weight: bold; font-size: 14px;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.notice-box .hd .date { color: var(--gray); font-weight: normal; font-size: 12.5px; }
.notice-box .bd { background: #fffdf5; padding: 12px 14px; }
.notice-box .ttl {
  color: var(--navy); font-weight: bold; font-size: 15px; margin-bottom: 6px;
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.notice-box .txt { white-space: pre-wrap; word-break: break-word; font-size: 14px; }

/* ---------- 贴吧：问答区 ---------- */
.qa-item { border: 1px solid var(--line); margin-bottom: 12px; background: #fff; }
.qa-q { background: var(--soft); padding: 9px 12px; border-bottom: 1px solid var(--line-light); }
.qa-tag {
  display: inline-block; border: 1px solid var(--navy); color: var(--navy);
  font-size: 12px; font-weight: bold; padding: 0 6px; margin-right: 8px;
  font-family: "SimHei", "黑体", sans-serif; vertical-align: 1px;
}
.qa-tag.ans { border-color: var(--green); color: var(--green); }
.qa-body { white-space: pre-wrap; word-break: break-word; font-size: 14px; }
.qa-meta { font-size: 12px; color: var(--gray); margin-top: 4px; padding-left: 34px; }
.qa-ans { padding: 8px 12px; border-top: 1px dashed var(--line-light); background: #fff; }
.qa-ans:nth-child(even) { background: #fafbfd; }
.qa-ans.qa-none { color: var(--gray); font-size: 13px; }
.qa-reply {
  display: flex; gap: 6px; flex-wrap: wrap; align-items: center;
  padding: 9px 12px; background: #fbfcfe; border-top: 1px solid var(--line-light);
}
.qa-reply input[type=text] { width: auto; flex: 1; min-width: 130px; font-size: 13px; padding: 5px 7px; }
.qa-reply input.nick { max-width: 170px; }
.qa-reply .btn { flex: 0 0 auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .topbar-inner { padding: 8px 10px; gap: 6px; }
  .nav { margin-left: 0; width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .nav a { font-size: 13px; padding: 7px 9px; }
  .page { padding: 12px 10px 30px; margin: 8px 6px 0; }
  .hero { padding: 12px; }
  .hero h1 { font-size: 20px; }
  .entry-grid { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .panel { padding: 12px; }
  .footer { margin: 8px 6px 0; }
  .modal-head h3 { font-size: 14px; }
  .brand .logo-img { height: 36px; }
  .slogan-bar .txt { min-width: 100%; font-size: 14px; }
  .qa-reply input[type=text] { min-width: 100%; }
  .qa-reply input.nick { max-width: none; }
  /* 手机端：检索字段名独占一行，输入框不被挤窄 */
  .toolbar .lab { flex: 0 0 100%; }
  .toolbar .grow { min-width: 0; flex: 1 1 60%; }
}

/* ---------- 连不上时的「自检结论」：老式方框，竖排，手机也好读 ---------- */
.diag { border: 1px solid var(--line); background: #fff; margin: 10px 0 14px; }
.diag .hd {
  background: var(--head-bg); border-bottom: 1px solid var(--line);
  border-left: 3px solid var(--navy); padding: 5px 12px;
  font-weight: bold; font-size: 14px; color: var(--navy);
  font-family: "SimHei", "黑体", "Microsoft YaHei", sans-serif;
}
.diag .bd { padding: 10px 12px 12px; font-size: 13.5px; line-height: 1.85; }
.diag .diag-reason { margin: 0 0 10px; color: var(--ink); }
.diag .diag-row { border-bottom: 1px dotted var(--line-light); padding: 5px 0; }
.diag .diag-row:last-of-type { border-bottom: 0; }
.diag .yes { color: var(--green); font-weight: bold; }
.diag .no { color: var(--red); font-weight: bold; }
.diag .diag-q { margin: 11px 0 4px; font-weight: bold; color: var(--navy); }
.diag .diag-steps { margin: 0 0 0 20px; padding: 0; }
.diag .diag-steps li { margin: 4px 0; }
.diag .diag-fine { margin: 11px 0 0; color: var(--gray); font-size: 12.5px; }