/* ============================================================
   西浦论坛 样式 — 复刻 Discourse 默认 Light/Dark 主题观感
   设计基准：Discourse 官方默认配色与尺寸体系（自行实现）
   primary #222 / secondary #fff / tertiary #08c
   基准字号 15px，模数字阶 ×1.1487，主宽 1110px，侧栏 17em
   ============================================================ */
:root {
  /* 官方 Light 色板 */
  --primary: #222222;
  --secondary: #ffffff;
  --tertiary: #0088cc;
  --quaternary: #e45735;
  --header_background: #ffffff;
  --header_primary: #333333;
  --highlight: #ffff4d;
  --selected: #d1f0ff;
  --hover: #f2f2f2;
  --danger: #c80001;
  --success: #009900;
  --love: #fa6c8d;
  /* 派生色（按官方混合比例计算） */
  --primary-very-low: #f8f8f8;
  --primary-low: #e9e9e9;
  --primary-low-mid: #bcbcbc;
  --primary-medium: #919191;
  --primary-high: #646464;
  --tertiary-low: #d9edf7;
  --tertiary-hover: #0074ad;
  --danger-low: #f6e2e2;
  /* 尺寸 */
  --d-max-width: 1110px;
  --d-sidebar-width: 15.5em;
  --header-height: 3.7em;
  --topic-body-width: 690px;
  --topic-avatar-width: 45px;
  --d-border-radius: 4px;
  /* 字阶（×1.1487） */
  --font-up-3: 1.5157em;
  --font-up-2: 1.3195em;
  --font-up-1: 1.1487em;
  --font-down-1: 0.8706em;
  --font-down-2: 0.7579em;
  --shadow-header: 0 2px 4px -1px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 4px 14px rgba(0, 0, 0, 0.15);
  --shadow-composer: 0 -1px 40px rgba(0, 0, 0, 0.12);
  color-scheme: light;
}
/* 官方 Dark 色板 */
:root[data-theme="dark"] {
  --primary: #dddddd; --secondary: #222222; --tertiary: #099dd7; --quaternary: #c14924;
  --header_background: #111111; --header_primary: #dddddd;
  --highlight: #a87137; --selected: #052e3d; --hover: #313131;
  --danger: #e45735; --success: #1ca551; --love: #fa6c8d;
  --primary-very-low: #2c2c2c; --primary-low: #363636; --primary-low-mid: #666666;
  --primary-medium: #9a9a9a; --primary-high: #c4c4c4;
  --tertiary-low: #0d3143; --tertiary-hover: #25aae2; --danger-low: #443130;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #dddddd; --secondary: #222222; --tertiary: #099dd7; --quaternary: #c14924;
    --header_background: #111111; --header_primary: #dddddd;
    --highlight: #a87137; --selected: #052e3d; --hover: #313131;
    --danger: #e45735; --success: #1ca551; --love: #fa6c8d;
    --primary-very-low: #2c2c2c; --primary-low: #363636; --primary-low-mid: #666666;
    --primary-medium: #9a9a9a; --primary-high: #c4c4c4;
    --tertiary-low: #0d3143; --tertiary-hover: #25aae2; --danger-low: #443130;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { font-size: 15px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--secondary); color: var(--primary);
  font-family: Arial, "Helvetica Neue", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.4;
}
a { color: var(--tertiary); text-decoration: none; }
a:hover { color: var(--tertiary-hover); }
button { font: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
img { max-width: 100%; }

/* ============ 顶栏（白底 + 细阴影，图标灰） ============ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--header_background); box-shadow: var(--shadow-header);
}
.nav-inner {
  max-width: var(--d-max-width); margin: 0 auto; height: var(--header-height);
  display: flex; align-items: center; gap: 0.5em; padding: 0 0.8em;
}
.brand { display: flex; align-items: center; gap: 0.5em; margin-right: auto; }
.brand:hover { text-decoration: none; }
.brand-logo {
  display: grid; place-items: center; width: 2.1333em; height: 2.1333em; border-radius: 4px;
  background: var(--tertiary); color: #fff; font-size: 0.94em; font-weight: 700; letter-spacing: 0.5px;
}
.brand-name { font-weight: 700; font-size: var(--font-up-1); color: var(--header_primary); }
.nav-right { display: flex; align-items: center; gap: 0.25em; }
.icon-btn {
  position: relative; display: grid; place-items: center;
  width: 2.2667em; height: 2.2667em; border: 0; border-radius: var(--d-border-radius);
  background: transparent; color: var(--primary-high); padding: 0;
}
.icon-btn:hover { background: var(--primary-low); color: var(--primary); }
.icon-btn svg { width: 1.3em; height: 1.3em; }
.badge-dot {
  position: absolute; top: 0; right: -2px; min-width: 1.2em; height: 1.2em; padding: 0 0.3em;
  border-radius: 999px; background: var(--tertiary); color: var(--secondary);
  font-size: 0.7333em; font-weight: 700; display: grid; place-items: center; line-height: 1;
}
.nav-avatar { border: 0; background: none; padding: 2px; border-radius: var(--d-border-radius); }
.nav-avatar:hover { background: var(--primary-low); }

/* 顶栏搜索下拉面板 */
.search-menu {
  position: absolute; right: 0; top: calc(100% + 2px); z-index: 110;
  width: min(500px, 92vw); background: var(--secondary);
  border: 1px solid var(--primary-low); border-radius: var(--d-border-radius);
  box-shadow: var(--shadow-card); padding: 0.7em;
}
.search-menu input {
  width: 100%; padding: 0.5em 0.7em; border: 1px solid var(--primary-low-mid);
  border-radius: var(--d-border-radius); background: var(--secondary); outline: 0;
}
.search-menu input:focus { border-color: var(--tertiary); }
.search-menu .hint { color: var(--primary-medium); font-size: var(--font-down-1); padding: 0.5em 0.2em 0.1em; }
.nav-right { position: relative; }

/* 顶栏下拉菜单（用户） */
.dropdown {
  position: absolute; right: 0.5em; top: var(--header-height); z-index: 110;
  background: var(--secondary); border: 1px solid var(--primary-low);
  border-radius: var(--d-border-radius); box-shadow: var(--shadow-card);
  min-width: 14em; overflow: hidden; padding: 0.35em;
}
.dropdown a, .dropdown button {
  display: flex; align-items: center; gap: 0.6em; width: 100%; padding: 0.5em 0.7em;
  border: 0; background: none; color: var(--primary); text-align: left;
  border-radius: var(--d-border-radius); font-size: 1em;
}
.dropdown a:hover, .dropdown button:hover { background: var(--hover); text-decoration: none; color: var(--primary); }
.dropdown .dd-head { padding: 0.6em 0.7em 0.45em; border-bottom: 1px solid var(--primary-low); margin-bottom: 0.35em; }
.dropdown .dd-head b { font-size: 1em; }
.dropdown .dd-head div { color: var(--primary-medium); font-size: var(--font-down-1); }

/* ============ 主体：侧栏 + 内容 ============ */
.shell {
  max-width: var(--d-max-width); margin: 0 auto;
  display: grid; grid-template-columns: var(--d-sidebar-width) minmax(0, 1fr);
  gap: 2em; padding: 0 0.8em;
}
.container { min-width: 0; padding: 1.2em 0 8em; }

/* 侧栏：与页面同底色、无边框，行高 2.2em */
.sidebar {
  position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height));
  overflow-y: auto; padding: 1.35em 0 2em; scrollbar-width: thin; font-size: 1em;
}
.side-sec { margin-bottom: 1.1em; padding-bottom: 0.15em; }
.side-head {
  display: flex; align-items: center; font-size: var(--font-down-1); font-weight: 700;
  color: var(--primary-high); padding: 0 0.85em 0.35em;
}
.side-item {
  display: flex; align-items: center; gap: 0.6em; height: 2.2em; padding: 0 0.85em;
  border-radius: var(--d-border-radius); color: var(--primary-high); font-size: 1em;
}
.side-item:hover { background: var(--hover); text-decoration: none; color: var(--primary); }
.side-item.on { background: var(--primary-low); color: var(--primary); font-weight: 500; }
.side-item .s-ico { width: 1.1em; height: 1.1em; flex-shrink: 0; color: var(--primary-medium); display: grid; place-items: center; }
.side-item .s-ico svg { width: 1.05em; height: 1.05em; }
.side-item span.txt { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.side-cnt { margin-left: auto; font-size: var(--font-down-1); color: var(--primary-medium); }
.badge-mini {
  margin-left: auto; background: var(--tertiary); color: var(--secondary); border-radius: 999px;
  min-width: 1.45em; height: 1.45em; display: grid; place-items: center;
  font-size: var(--font-down-2); font-weight: 700; padding: 0 0.35em;
}
.cat-square { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.side-empty { color: var(--primary-medium); font-size: var(--font-down-1); padding: 0.1em 0.9em 0.4em; }
button.side-item { width: 100%; border: 0; background: none; cursor: pointer; text-align: left; }
#btn-drawer { display: none; }
.drawer-mask { position: fixed; inset: 0; top: var(--header-height); background: rgba(0, 0, 0, 0.4); z-index: 90; }

/* ============ 列表控制区：类别/标签下拉 + 导航 pills + 新建话题 ============ */
.list-controls { display: flex; align-items: flex-start; gap: 0.6em; margin-bottom: 1em; flex-wrap: wrap; }
.combo {
  appearance: none; -webkit-appearance: none;
  border: 1px solid var(--primary-low-mid); border-radius: var(--d-border-radius);
  background: var(--secondary); color: var(--primary); font-size: 1em;
  padding: 0.4em 1.8em 0.4em 0.65em; max-width: 12em;
  background-image: linear-gradient(45deg, transparent 50%, var(--primary-high) 50%),
    linear-gradient(135deg, var(--primary-high) 50%, transparent 50%);
  background-position: calc(100% - 0.95em) 50%, calc(100% - 0.6em) 50%;
  background-size: 0.35em 0.35em, 0.35em 0.35em; background-repeat: no-repeat;
}
.combo:hover { border-color: var(--primary-medium); }
.nav-pills { display: flex; gap: 0.25em; list-style: none; margin: 0; padding: 0; }
.nav-pills button {
  border: 0; background: transparent; color: var(--primary-high); font-size: 1em;
  padding: 0.42em 0.8em; border-radius: var(--d-border-radius); line-height: 1.3;
}
.nav-pills button:hover { background: var(--hover); }
.nav-pills button.on { background: var(--primary-low); color: var(--primary); font-weight: 500; }

/* ============ 按钮（扁平、无边框、微圆角） ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45em;
  padding: 0.5em 0.85em; border: 0; border-radius: var(--d-border-radius);
  background: var(--primary-very-low); color: var(--primary-high);
  font-size: 1em; font-weight: 400; line-height: 1.3; transition: background 0.15s, color 0.15s;
}
.btn:hover { background: var(--primary-low); color: var(--primary); text-decoration: none; }
.btn svg { width: 1.05em; height: 1.05em; }
.btn-pri { background: var(--tertiary); color: #fff; }
.btn-pri:hover { background: var(--tertiary-hover); color: #fff; }
.btn-ghost { background: transparent; color: var(--primary-high); }
.btn-ghost:hover { background: var(--primary-low); }
.btn-danger { background: transparent; color: var(--danger); }
.btn-danger:hover { background: var(--danger-low); color: var(--danger); }
.btn-sm { padding: 0.35em 0.65em; font-size: var(--font-down-1); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.input, textarea.input, select.input {
  width: 100%; padding: 0.5em 0.7em; border: 1px solid var(--primary-low-mid);
  border-radius: var(--d-border-radius); background: var(--secondary); outline: 0; font-size: 1em;
}
.input:focus { border-color: var(--tertiary); outline: 2px solid var(--tertiary-low); }
.field { margin-bottom: 1em; }
.field label { display: block; font-size: var(--font-down-1); font-weight: 700; color: var(--primary-high); margin-bottom: 0.35em; }
.field .hint { font-size: var(--font-down-1); color: var(--primary-medium); margin-top: 0.3em; }

/* ============ 头像 ============ */
.ava {
  border-radius: 50%; object-fit: cover; flex-shrink: 0; display: grid; place-items: center;
  color: #fff; font-weight: 700; user-select: none; background: #888;
}
.ava-24 { width: 24px; height: 24px; font-size: 12px; }
.ava-25 { width: 25px; height: 25px; font-size: 12px; }
.ava-32 { width: 32px; height: 32px; font-size: 15px; }
.ava-45 { width: 45px; height: 45px; font-size: 20px; }
.ava-72 { width: 72px; height: 72px; font-size: 32px; }

/* ============ 分类徽章（彩色小方块 + 名称）与标签 ============ */
.badge-category {
  display: inline-flex; align-items: center; gap: 0.4em;
  color: var(--primary-high); font-size: var(--font-down-1); font-weight: 500; line-height: 1.2;
}
.badge-category .badge-square { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
a.badge-category:hover { color: var(--primary); }
.discourse-tag {
  color: var(--primary-medium); font-size: var(--font-down-1); font-weight: 400; line-height: 1.2;
}
a.discourse-tag:hover { color: var(--primary-high); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.35em 1.1em; padding: 0.5em 0; }
.t-tag-lg { font-size: 1em; }
.t-tag-lg .tc { color: var(--primary-low-mid); font-size: var(--font-down-1); margin-left: 0.35em; }

/* ============ 公告条 / 板块页头 ============ */
.announce {
  display: flex; gap: 0.6em; align-items: flex-start;
  background: var(--tertiary-low); color: var(--primary);
  border-radius: var(--d-border-radius); padding: 0.7em 1em; margin-bottom: 1em; font-size: var(--font-down-1);
}
.cat-head { display: flex; align-items: center; gap: 0.8em; padding: 0.2em 0 0.9em; border-bottom: 1px solid var(--primary-low); margin-bottom: 1em; }
.cat-head .emoji { font-size: 1.8em; }
.cat-head h2 { margin: 0; font-size: var(--font-up-2); display: flex; align-items: center; gap: 0.4em; }
.cat-head p { margin: 0.15em 0 0; color: var(--primary-high); font-size: var(--font-down-1); }

/* ============ 话题列表（表格 / 扁平 / 细分隔线） ============ */
.topic-list { width: 100%; border-collapse: collapse; }
.topic-list th {
  text-align: left; color: var(--primary-medium); font-weight: 400; font-size: var(--font-down-1);
  padding: 0.6em 0.35em; border-bottom: 3px solid var(--primary-low); white-space: nowrap;
}
.topic-list th.num, .topic-list td.num { text-align: center; width: 4em; }
.topic-list th.age, .topic-list td.age { text-align: right; width: 5em; }
.topic-list th.posters-h, .topic-list td.posters { width: 6.2em; }
.topic-list td { border-bottom: 1px solid var(--primary-low); padding: 0.8em 0.35em; vertical-align: middle; }
.topic-list tr.topic-item { cursor: pointer; }
.topic-list tr.topic-item:hover { background: var(--primary-very-low); }
.main-link { min-width: 0; }
.main-link .title {
  font-size: var(--font-up-1); font-weight: 400; color: var(--primary);
  line-height: 1.3; word-break: break-word;
}
.main-link .title:visited { color: var(--primary-medium); }
.main-link .title:hover { color: var(--primary-high); text-decoration: none; }
.t-icons { color: var(--primary-medium); font-size: var(--font-down-1); margin-right: 0.2em; }
.t-icons svg { width: 1em; height: 1em; vertical-align: -0.12em; }
.topic-excerpt {
  margin: 0.25em 0 0; color: var(--primary-high); font-size: var(--font-down-1); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; word-break: break-word;
}
.link-bottom-line { display: flex; align-items: center; gap: 0.75em; margin-top: 0.3em; flex-wrap: wrap; }
.posters { white-space: nowrap; }
.posters .ava { display: inline-grid; vertical-align: middle; margin-right: 2px; }
.topic-list .num { color: var(--primary-medium); font-size: 1em; }
.topic-list .num.heat-med { color: #cf7721; }
.topic-list .num.heat-high { color: #d5502a; }
.topic-list .age { color: var(--primary-medium); font-size: var(--font-down-1); white-space: nowrap; }
.m-meta { display: none; }

/* ============ 帖子页（扁平帖子流 + 右侧时间线） ============ */
.topic-header h1 { margin: 0 0 0.25em; font-size: var(--font-up-3); font-weight: 700; line-height: 1.3; word-break: break-word; }
.topic-header h1 .t-icons { font-size: 0.65em; }
.topic-header .topic-category { display: flex; align-items: center; gap: 0.8em; flex-wrap: wrap; padding-bottom: 0.6em; }
.topic-header { border-bottom: 1px solid var(--primary-low); margin-bottom: 0; }
.mod-bar { display: flex; gap: 0.4em; margin: 0.6em 0; flex-wrap: wrap; }

.topic-columns { display: grid; grid-template-columns: minmax(0, var(--topic-body-width)) 1fr; gap: 2.5em; align-items: start; }
.post-stream { min-width: 0; max-width: var(--topic-body-width); }
.topic-post { display: flex; gap: 0; border-bottom: 1px solid var(--primary-low); padding: 1em 0 0.35em; scroll-margin-top: 4.5em; }
.topic-post.focus-flash { animation: dflash 2s ease-out; }
@keyframes dflash { 0%, 40% { background: var(--tertiary-low); } 100% {} }
.topic-avatar { width: var(--topic-avatar-width); flex-shrink: 0; margin-right: 0.85em; }
.topic-body { flex: 1; min-width: 0; }
.post-names { display: flex; align-items: baseline; gap: 0.6em; flex-wrap: wrap; }
.post-names .username { font-weight: 700; color: var(--primary-high); font-size: 1em; }
.post-names .username:hover { color: var(--primary); }
.post-names .user-title { color: var(--primary-medium); font-size: var(--font-down-1); }
.post-names .post-date { margin-left: auto; color: var(--primary-medium); font-size: var(--font-down-1); }
.post-names .floor-no { color: var(--primary-low-mid); font-size: var(--font-down-1); }
.staff-color { color: var(--quaternary); }
.op-color { color: var(--tertiary); }
.post-body { margin: 0.5em 0 0.2em; font-size: 1em; line-height: 1.5; word-break: break-word; overflow-wrap: anywhere; }
.post-deleted { color: var(--primary-medium); font-style: italic; padding: 0.5em 0; font-size: var(--font-down-1); }
.ref-block {
  display: block; background: var(--primary-very-low); border-left: 4px solid var(--primary-low);
  padding: 0.5em 0.8em; margin: 0.6em 0 0.2em; font-size: var(--font-down-1); color: var(--primary-high);
}
.ref-block:hover { background: var(--primary-low); text-decoration: none; color: var(--primary-high); }
.ref-block b { color: var(--primary); }
.post-controls { display: flex; align-items: center; justify-content: flex-end; gap: 0.1em; margin-top: 0.35em; }
.act-btn {
  display: inline-flex; align-items: center; gap: 0.35em; border: 0; background: none;
  color: var(--primary-medium); font-size: var(--font-down-1); padding: 0.5em 0.65em;
  border-radius: var(--d-border-radius);
}
.act-btn:hover { background: var(--primary-very-low); color: var(--primary-high); }
.act-btn.liked { color: var(--love); }
.act-btn svg { width: 1.15em; height: 1.15em; }
.edited-mark { color: var(--primary-low-mid); font-size: var(--font-down-1); }

/* 时间线 */
.topic-timeline { position: sticky; top: 6em; width: 9em; font-size: var(--font-down-1); color: var(--primary-medium); user-select: none; }
.timeline-date { padding: 0.15em 0 0.15em 1.1em; }
.timeline-track { position: relative; margin: 0.4em 0 0.4em 1.35em; width: 3px; height: 10em; background: var(--primary-low); border-radius: 2px; cursor: pointer; }
.timeline-handle { position: absolute; left: -2px; width: 7px; border-radius: 4px; background: var(--tertiary); min-height: 1.6em; }
.timeline-pos { position: absolute; left: 14px; transform: translateY(-30%); white-space: nowrap; color: var(--primary); font-weight: 700; }
.timeline-pos small { display: block; color: var(--primary-medium); font-weight: 400; }
.topic-footer { display: flex; gap: 0.6em; align-items: center; margin: 1.2em 0; }
.locked-note { color: var(--primary-medium); padding: 1em 0; font-size: 1em; }

/* ============ 分页 ============ */
.pager { display: flex; gap: 0.3em; justify-content: center; margin: 1.2em 0; flex-wrap: wrap; }
.pager button {
  min-width: 2.2em; height: 2.2em; border-radius: var(--d-border-radius); border: 0;
  background: var(--primary-very-low); color: var(--primary-high); font-size: var(--font-down-1);
}
.pager button:hover { background: var(--primary-low); }
.pager button.on { background: var(--tertiary); color: #fff; font-weight: 700; }
.pager button:disabled { opacity: 0.4; cursor: default; background: transparent; }

/* ============ 帖内 Markdown ============ */
.post-body p { margin: 0 0 0.75em; }
.post-body p:last-child { margin-bottom: 0; }
.post-body h2, .post-body h3, .post-body h4 { margin: 1em 0 0.5em; line-height: 1.3; }
.post-body h2 { font-size: var(--font-up-2); } .post-body h3 { font-size: var(--font-up-1); } .post-body h4 { font-size: 1em; }
.post-body blockquote {
  margin: 0 0 0.75em; padding: 0.7em 0.9em; border-left: 4px solid var(--primary-low);
  color: var(--primary-high); background: var(--primary-very-low);
}
.post-body ul, .post-body ol { margin: 0 0 0.75em; padding-left: 1.8em; }
.post-body pre.code {
  background: var(--primary-very-low); border: 0; border-radius: var(--d-border-radius);
  padding: 0.7em 0.9em; overflow-x: auto; font-size: var(--font-down-1); line-height: 1.5; margin: 0 0 0.75em;
}
.post-body code.ic { background: var(--primary-very-low); border-radius: 3px; padding: 0.1em 0.35em; font-size: var(--font-down-1); }
.post-body pre.code code { font-family: Consolas, "Cascadia Mono", monospace; }
.post-body img.md-img { max-width: min(100%, 480px); max-height: 420px; display: block; margin: 0.35em 0 0.75em; cursor: zoom-in; border-radius: 2px; }
.post-body hr { border: 0; border-top: 1px solid var(--primary-low); margin: 1em 0; }
.post-body a.mention {
  font-weight: 700; background: var(--primary-very-low); color: var(--primary-high);
  padding: 0 0.3em; border-radius: 8px; font-size: var(--font-down-1);
}
.post-body a.mention:hover { background: var(--primary-low); }

/* ============ 编辑器（底部停靠 + 左右分屏预览） ============ */
.composer {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 120;
  background: var(--secondary); box-shadow: var(--shadow-composer);
  border-top: 1px solid var(--primary-low);
  max-width: 1475px; margin: 0 auto; padding: 0 1em 0.8em;
  display: flex; flex-direction: column; gap: 0.55em; max-height: 80vh;
}
.grippie { height: 11px; margin: 0 -1em; background: var(--primary-low); cursor: row-resize; display: grid; place-items: center; }
.grippie::before { content: ""; width: 26px; height: 3px; border-radius: 2px; background: var(--primary-low-mid); }
.comp-ctx { display: flex; align-items: center; gap: 0.5em; color: var(--primary-high); font-size: var(--font-down-1); }
.comp-ctx b { color: var(--primary); }
.comp-close { margin-left: auto; }
.comp-row { display: flex; gap: 0.5em; }
.composer select.input { width: auto; flex-shrink: 0; max-width: 40%; }
.comp-toolbar { display: flex; gap: 0.1em; flex-wrap: wrap; border-bottom: 1px solid var(--primary-low); padding-bottom: 0.35em; }
.comp-toolbar button {
  border: 0; background: none; color: var(--primary-high); padding: 0.35em 0.6em;
  border-radius: var(--d-border-radius); font-size: var(--font-down-1);
}
.comp-toolbar button:hover { background: var(--primary-very-low); }
.comp-main { display: grid; grid-template-columns: 1fr 1fr; gap: 1em; min-height: 8em; }
.comp-main textarea { resize: none; min-height: 8em; max-height: 42vh; line-height: 1.5; border: 0; outline: 0; padding: 0.3em 0.1em; background: transparent; width: 100%; }
.comp-preview { overflow-y: auto; border-left: 1px solid var(--primary-low); padding: 0.3em 0 0.3em 1em; max-height: 42vh; min-height: 8em; }
.comp-preview:empty::before { content: "预览"; color: var(--primary-low-mid); }
.comp-foot { display: flex; align-items: center; gap: 0.6em; }
.comp-count { color: var(--primary-medium); font-size: var(--font-down-1); margin-left: auto; }
.comp-backdrop { position: fixed; inset: 0; background: transparent; z-index: 115; }

/* ============ 模态框 ============ */
.modal-mask {
  position: fixed; inset: 0; z-index: 130; background: rgba(0, 0, 0, 0.6);
  display: grid; place-items: center; padding: 1.2em;
}
.modal {
  background: var(--secondary); border-radius: 8px; width: 100%; max-width: 28em;
  padding: 1.6em; box-shadow: var(--shadow-card); max-height: 88vh; overflow-y: auto;
}
.modal h3 { margin: 0 0 1em; font-size: var(--font-up-2); }
.auth-tabs { display: flex; gap: 1.2em; border-bottom: 1px solid var(--primary-low); margin-bottom: 1.2em; }
.auth-tabs button {
  border: 0; background: none; padding: 0 0.1em 0.65em; font-size: var(--font-up-1);
  color: var(--primary-medium); border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.auth-tabs button.on { color: var(--primary); border-color: var(--tertiary); font-weight: 700; }
.form-err { color: var(--danger); font-size: var(--font-down-1); min-height: 1.2em; margin-bottom: 0.5em; }

/* ============ 通知页 ============ */
.notif-list { border-top: 1px solid var(--primary-low); }
.notif-row {
  display: flex; gap: 0.8em; padding: 0.8em 0.5em; border-bottom: 1px solid var(--primary-low);
  color: inherit; align-items: center;
}
.notif-row:hover { background: var(--primary-very-low); text-decoration: none; }
.notif-row.unread { background: var(--tertiary-low); }
.notif-row.unread:hover { background: var(--tertiary-low); filter: brightness(0.98); }
.notif-main { flex: 1; min-width: 0; font-size: 1em; color: var(--primary-high); }
.notif-main b { color: var(--primary); }
.notif-main .n-title { color: var(--tertiary); }
.notif-time { color: var(--primary-medium); font-size: var(--font-down-1); flex-shrink: 0; }

/* ============ 用户页 ============ */
.profile-card { display: flex; gap: 1.2em; align-items: center; padding: 1.2em 0; border-bottom: 1px solid var(--primary-low); margin-bottom: 1em; flex-wrap: wrap; }
.profile-card .p-main { flex: 1; min-width: 14em; }
.profile-card h2 { margin: 0 0 0.1em; font-size: var(--font-up-2); display: flex; align-items: center; gap: 0.5em; flex-wrap: wrap; }
.profile-card .p-bio { color: var(--primary-high); font-size: 1em; margin: 0.25em 0; }
.profile-card .p-meta { color: var(--primary-medium); font-size: var(--font-down-1); display: flex; gap: 1em; flex-wrap: wrap; }
.mini-list { border-top: 1px solid var(--primary-low); }
.mini-row { display: block; padding: 0.75em 0.4em; border-bottom: 1px solid var(--primary-low); color: inherit; }
.mini-row:hover { background: var(--primary-very-low); text-decoration: none; }
.mini-row .m-title { font-weight: 400; font-size: var(--font-up-1); color: var(--primary); }
.mini-row .m-sub { color: var(--primary-medium); font-size: var(--font-down-1); margin-top: 0.2em; display: flex; align-items: center; gap: 0.7em; flex-wrap: wrap; }
.mini-row .m-excerpt { color: var(--primary-high); font-size: var(--font-down-1); margin-top: 0.2em; }

/* ============ 管理后台 / 设置 / 分类总览 ============ */
.panel { border: 1px solid var(--primary-low); border-radius: var(--d-border-radius); padding: 1.1em; margin-bottom: 1em; background: var(--secondary); }
.panel h3 { margin: 0 0 0.8em; font-size: var(--font-up-1); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(8.5em, 1fr)); gap: 0.7em; margin-bottom: 1em; }
.stat-card { border: 1px solid var(--primary-low); border-radius: var(--d-border-radius); padding: 0.9em 1em; }
.stat-card .s-num { font-size: var(--font-up-2); font-weight: 700; }
.stat-card .s-label { color: var(--primary-medium); font-size: var(--font-down-1); }
.stat-card .s-today { color: var(--success); font-size: var(--font-down-1); }
.table-wrap { overflow-x: auto; }
table.adm { width: 100%; border-collapse: collapse; font-size: var(--font-down-1); }
table.adm th { text-align: left; color: var(--primary-medium); font-weight: 400; padding: 0.55em 0.6em; border-bottom: 2px solid var(--primary-low); white-space: nowrap; }
table.adm td { padding: 0.6em; border-bottom: 1px solid var(--primary-low); vertical-align: middle; }
.tag { display: inline-block; padding: 0.05em 0.55em; border-radius: 999px; font-size: var(--font-down-2); font-weight: 700; }
.tag-ok { background: #e6f2e6; color: var(--success); }
.tag-warn { background: var(--danger-low); color: var(--danger); }
.tag-mod { background: var(--tertiary-low); color: var(--tertiary); }
:root[data-theme="dark"] .tag-ok { background: #14331a; }
.adm-tabs { display: flex; gap: 0.3em; flex-wrap: wrap; margin-bottom: 1em; border-bottom: 1px solid var(--primary-low); padding-bottom: 0.6em; }
.adm-tabs a { padding: 0.35em 0.7em; border-radius: var(--d-border-radius); color: var(--primary-high); font-size: var(--font-down-1); }
.adm-tabs a:hover { background: var(--hover); text-decoration: none; }
.adm-tabs a.on { background: var(--primary-low); color: var(--primary); font-weight: 500; }

/* 分类总览页（/categories） */
.category-list { width: 100%; border-collapse: collapse; }
.category-list th { text-align: left; color: var(--primary-medium); font-weight: 400; font-size: var(--font-down-1); padding: 0.6em 0.5em; border-bottom: 3px solid var(--primary-low); }
.category-list td { border-bottom: 1px solid var(--primary-low); padding: 0.9em 0.5em; vertical-align: top; }
.category-list td.cat-cell { border-left: 6px solid var(--cc, var(--tertiary)); padding-left: 0.8em; }
.category-list .cat-name { font-size: var(--font-up-1); color: var(--primary); font-weight: 500; }
.category-list .cat-desc { color: var(--primary-high); font-size: var(--font-down-1); margin-top: 0.2em; }
.category-list td.num { text-align: center; color: var(--primary-medium); width: 5em; }

/* ============ 其他 ============ */
.empty { text-align: center; color: var(--primary-medium); padding: 3em 1.2em; font-size: 1em; }
.empty .e-icon { font-size: 2.4em; margin-bottom: 0.3em; }
.page-loading { display: grid; place-items: center; padding: 4em 0; }
.spinner { width: 2em; height: 2em; border-radius: 50%; border: 3px solid var(--primary-low); border-top-color: var(--primary-medium); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.load-more { display: block; width: 100%; margin-top: 0.8em; }
#toast-root { position: fixed; top: calc(var(--header-height) + 0.8em); left: 0; right: 0; z-index: 150; display: flex; flex-direction: column; align-items: center; gap: 0.5em; pointer-events: none; }
.toast { background: var(--primary); color: var(--secondary); padding: 0.55em 1.2em; border-radius: var(--d-border-radius); font-size: var(--font-down-1); box-shadow: var(--shadow-card); animation: toastIn 0.25s ease-out; max-width: 88vw; }
.toast.t-err { background: var(--danger); color: #fff; }
.toast.t-ok { background: var(--success); color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-8px); } }
.sec-title { font-size: var(--font-up-1); font-weight: 700; margin: 1.2em 0 0.7em; display: flex; align-items: center; gap: 0.5em; }
.sec-title .cnt { color: var(--primary-medium); font-weight: 400; font-size: var(--font-down-1); }
.lightbox { position: fixed; inset: 0; z-index: 160; background: rgba(0, 0, 0, 0.85); display: grid; place-items: center; cursor: zoom-out; padding: 1.2em; }
.lightbox img { max-width: 96vw; max-height: 92vh; }
.role-tag { font-size: var(--font-down-2); padding: 0.1em 0.5em; border-radius: 999px; font-weight: 700; background: var(--primary-low); color: var(--primary-high); }
.role-tag.staff { background: var(--tertiary-low); color: var(--tertiary); }

/* ============ 响应式 ============ */
@media (max-width: 1250px) { .topic-timeline { display: none; } .topic-columns { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 1023px) {
  #btn-drawer { display: grid; }
  .shell { grid-template-columns: 1fr; padding: 0 0.7em; }
  .sidebar {
    position: fixed; left: 0; top: var(--header-height); bottom: 0; height: auto; width: var(--d-sidebar-width);
    background: var(--secondary); z-index: 95; transform: translateX(-105%); transition: transform 0.18s ease;
    padding: 1em 0.5em 2em; border-right: 1px solid var(--primary-low);
  }
  .sidebar.open { transform: none; box-shadow: var(--shadow-card); }
}
@media (max-width: 767px) {
  .brand-name { display: none; }
  .topic-list thead, .topic-list td.posters, .topic-list td.num.views-cell, .topic-list td.age { display: none; }
  .topic-list td { padding: 0.7em 0.2em; }
  .topic-list td.num.replies-cell { width: 3em; color: var(--primary-medium); font-size: var(--font-down-1); vertical-align: top; padding-top: 1em; }
  .m-meta { display: inline; color: var(--primary-low-mid); font-size: var(--font-down-1); }
  .composer { max-height: 94vh; }
  .comp-main { grid-template-columns: 1fr; }
  .comp-preview { display: none; border-left: 0; padding-left: 0; }
  .comp-preview.mobile-show { display: block; }
  .comp-main.previewing textarea { display: none; }
  .composer select.input { max-width: 36%; }
  .search-menu { position: fixed; left: 0.5em; right: 0.5em; top: var(--header-height); width: auto; }
}