/* ==========================================================================
   灵素书斋 · 前台样式
   适配范围：小屏手机 / 手机 / 平板 / 桌面 / 宽屏 / 打印 / 深色模式
   断点：400 700 900 1120
   ========================================================================== */

:root {
  color-scheme: light;

  /* 版面尺寸 */
  --read: 780px;                      /* 长文阅读栏宽（一行别太长） */
  --wide: 1080px;                     /* 宽屏容器宽（列表页用） */
  --gut: clamp(16px, 4vw, 22px);      /* 左右基础留白，随屏幕流体 */
  --head-h: 62px;

  /* 纸面底色 */
  --paper: #f8f5ef;
  --card: #fffdf9;
  --surface: #fffefb;                 /* 输入框底 */
  --surface-2: #f2ece1;               /* 行内代码 / 标签底 */
  --surface-3: #f4f0e7;               /* 页脚 / 表头底 */
  --quote-bg: #faf7f1;
  --disabled-bg: #f3efe7;
  --head-bg: rgba(248, 245, 239, .92);

  /* 墨色 */
  --ink: #2c2723;
  --ink-2: #6b6259;
  --ink-3: #9c9389;
  --line: #e8e0d2;
  --line-2: #d9cfbe;

  /* 强调色 */
  --accent: #a8442f;
  --accent-hover: #933924;
  --accent-soft: #f6e6e0;
  --link: #3d6b60;

  /* 状态色 */
  --ok-ink: #2f6b52;
  --ok-bg: #f2f8f4;
  --ok-line: #cfe0d6;
  --err-ink: #a8442f;
  --err-bg: #fdf1ee;
  --err-line: #ecc9c1;

  --mark-bg: #fbe6c8;
  --shadow: rgba(60, 50, 40, .12);
  --shadow-sm: rgba(60, 50, 40, .07);

  /* 首字头像（--h 由 JS 按名字哈希注入） */
  --avatar-bg: hsl(var(--h, 20), 42%, 88%);
  --avatar-ink: hsl(var(--h, 20), 45%, 32%);

  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;   /* 长网址 / 长串不撑破版面 */
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }
/* 左右留白同时避开刘海屏的横屏安全区 */
.wrap {
  width: 100%;
  max-width: var(--read);
  margin: 0 auto;
  padding-left: max(var(--gut), env(safe-area-inset-left));
  padding-right: max(var(--gut), env(safe-area-inset-right));
}
.muted { color: var(--ink-2); font-size: 14px; }
.dot { color: var(--ink-3); margin: 0 2px; }
.mono { font-family: var(--mono); font-size: .92em; }
.nowrap { white-space: nowrap; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 页头 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: var(--head-bg);
  backdrop-filter: saturate(1.2) blur(6px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);   /* 刘海屏状态栏 */
}
.head-inner { display: flex; align-items: center; gap: 18px; height: var(--head-h); }
.brand { display: flex; align-items: baseline; gap: 10px; color: var(--ink); min-width: 0; }
.brand:hover { text-decoration: none; }
.brand-title { font-family: var(--serif); font-size: 20px; letter-spacing: .06em; white-space: nowrap; }
.brand-sub { font-size: 12.5px; color: var(--ink-3); letter-spacing: .04em; }
.nav { display: flex; gap: 16px; margin-left: auto; }
.nav-link { font-size: 14px; color: var(--ink-2); padding: 4px 0; border-bottom: 1.5px solid transparent; }
.nav-link:hover { color: var(--ink); text-decoration: none; }
.nav-link.is-active { color: var(--accent); border-bottom-color: var(--accent); }
.search { display: flex; align-items: center; border: 1px solid var(--line-2); background: var(--card); border-radius: 999px; padding: 2px 4px 2px 12px; }
.search input { border: 0; background: transparent; outline: none; font: inherit; font-size: 13.5px; width: 110px; color: var(--ink); }
.search button { border: 0; background: transparent; color: var(--ink-3); cursor: pointer; padding: 4px 6px; display: flex; align-items: center; }
.search button:hover { color: var(--accent); }

/* ---------- 主体 ---------- */
.main {
  padding-top: clamp(22px, 4vw, 34px);
  padding-bottom: clamp(44px, 8vw, 60px);
  min-height: 60vh;
}
.flash { border: 1px solid var(--line-2); background: var(--card); border-radius: 10px; padding: 10px 14px; font-size: 14px; margin-bottom: 18px; }
.flash.ok { border-color: var(--ok-line); background: var(--ok-bg); color: var(--ok-ink); }
.flash.err { border-color: var(--err-line); background: var(--err-bg); color: var(--err-ink); }
.page-head { margin: 4px 0 26px; }
.page-head h1 { font-family: var(--serif); font-size: clamp(21px, 5vw, 24px); margin: 0 0 6px; font-weight: 500; letter-spacing: .03em; }
.sec-title { font-family: var(--serif); font-size: 17px; font-weight: 500; margin: 34px 0 14px; padding-left: 10px; border-left: 3px solid var(--accent); letter-spacing: .04em; }
.empty { text-align: center; padding: 60px 0; color: var(--ink-2); }
.nf-title { font-family: var(--serif); font-size: clamp(40px, 12vw, 56px); margin: 0 0 8px; color: var(--line-2); }
/* 页内锚点（如评论 #c12）跳转时别被吸顶页头盖住 */
:target { scroll-margin-top: calc(var(--head-h) + 16px); }

/* ---------- 文章卡片 ---------- */
.list { display: flex; flex-direction: column; gap: 16px; }
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
  transition: border-color .15s ease, transform .15s ease;
}
.card.has-cover { display: grid; grid-template-columns: 1fr 168px; gap: 20px; align-items: start; }
.card-cover { display: block; border-radius: 8px; overflow: hidden; grid-column: 2; grid-row: 1; }
.card-cover img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.card.has-cover .card-body { grid-column: 1; grid-row: 1; min-width: 0; }
.card-body { min-width: 0; }
.card-title { font-family: var(--serif); font-size: 19px; font-weight: 500; margin: 0 0 8px; line-height: 1.5; letter-spacing: .02em; }
.card-title a { color: var(--ink); }
.card-summary { margin: 0 0 12px; color: var(--ink-2); font-size: 14.5px; line-height: 1.7; }
.card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12.5px; color: var(--ink-3); }
.card-cat { color: var(--link); }
.pin-badge {
  display: inline-block; font-size: 11.5px; line-height: 1; padding: 5px 7px; border-radius: 5px;
  background: var(--accent-soft); color: var(--accent); letter-spacing: .06em; margin-bottom: 10px;
}
.card > .pin-badge { position: absolute; top: 0; right: 24px; border-radius: 0 0 6px 6px; margin: 0; }
.card.has-cover > .pin-badge { right: auto; left: 24px; }
/* 有悬停能力的设备才给悬浮反馈（触屏点一下会「粘住」高亮） */
@media (hover: hover) {
  .card:hover { border-color: var(--line-2); }
  .card:hover .card-title a { color: var(--accent); }
}

/* ---------- 标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  font-size: 12.5px; color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 999px; padding: 3px 10px;
}
.chip:hover { color: var(--accent); border-color: var(--accent-soft); text-decoration: none; }
.chip em { font-style: normal; color: var(--ink-3); font-size: 11.5px; margin-left: 3px; }

/* ---------- 文章页 ---------- */
.post { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 34px 40px 26px; }
.post-head { margin-bottom: 26px; }
.post-title { font-family: var(--serif); font-size: clamp(22px, 6vw, 28px); line-height: 1.45; font-weight: 500; margin: 0 0 14px; letter-spacing: .02em; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; font-size: 13px; color: var(--ink-3); }
.post-meta .pin-badge { margin: 0; }
.post-cat { color: var(--link); }
.post-cover { display: block; width: 100%; border-radius: 10px; margin: 6px 0 26px; }
.post-body { font-size: clamp(15.5px, 4.2vw, 16px); line-height: 1.9; }
.post-body > *:first-child { margin-top: 0; }
.post-body h1, .post-body h2, .post-body h3, .post-body h4 { font-family: var(--serif); font-weight: 500; line-height: 1.5; margin: 2em 0 .7em; letter-spacing: .02em; }
.post-body h2 { font-size: 21px; padding-bottom: .35em; border-bottom: 1px solid var(--line); }
.post-body h3 { font-size: 18px; }
.post-body p { margin: 0 0 1.15em; }
.post-body ul, .post-body ol { padding-left: 1.4em; margin: 0 0 1.15em; }
.post-body li { margin: .35em 0; }
.post-body blockquote {
  margin: 1.4em 0; padding: 2px 18px; border-left: 3px solid var(--line-2);
  background: var(--quote-bg); color: var(--ink-2); border-radius: 0 8px 8px 0;
}
.post-body blockquote p:last-child { margin-bottom: .6em; }
.post-body code { font-family: var(--mono); font-size: .9em; background: var(--surface-2); padding: 2px 6px; border-radius: 5px; }
.post-body pre.code {
  position: relative; background: var(--quote-bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto; margin: 1.4em 0;
}
.post-body pre.code code { background: none; padding: 0; font-size: 13.2px; line-height: 1.7; }
.post-body pre.code[data-lang]::before {
  content: attr(data-lang); position: absolute; top: 0; right: 12px; font-size: 11px; color: var(--ink-3);
  background: var(--card); padding: 2px 6px; border-radius: 0 0 5px 5px;
}
.post-body hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }
.post-body img { border-radius: 8px; }
.table-wrap { overflow-x: auto; margin: 1.4em 0; -webkit-overflow-scrolling: touch; }
.post-body table { border-collapse: collapse; width: 100%; font-size: 14px; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.post-body th { background: var(--surface-3); font-weight: 500; }
.post-foot { margin-top: 34px; }
.post-end { text-align: center; color: var(--ink-3); font-size: 12.5px; letter-spacing: .3em; margin-bottom: 18px; }
.post-nav { display: flex; justify-content: center; }
.back { font-size: 14px; }

.related { margin-top: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 6px 24px 20px; }
.rel-list { list-style: none; margin: 0; padding: 0; }
.rel-list li { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; padding: 9px 0; border-bottom: 1px dashed var(--line); }
.rel-list li:last-child { border-bottom: 0; }
.rel-date { font-size: 12.5px; color: var(--ink-3); white-space: nowrap; }

/* ---------- 评论 ---------- */
.comments { margin-top: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 6px 24px 24px; }
.comment-list { list-style: none; margin: 0; padding: 0; }
.comment-list .comment-list { margin-left: 18px; padding-left: 16px; border-left: 2px solid var(--line); }
.comment { padding: 14px 0; border-bottom: 1px dashed var(--line); }
.comment:last-child { border-bottom: 0; }
.comment-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; flex-wrap: wrap; }
.comment-author { font-size: 14px; color: var(--ink); font-weight: 500; }
.comment-time { font-size: 12px; color: var(--ink-3); }
.comment-body { font-size: 14.5px; color: var(--ink-2); }
.comment-form { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.cf-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.comment-form input[type=text], .comment-form input[type=email], .comment-form textarea {
  width: 100%; font: inherit; font-size: 14px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line-2); border-radius: 8px; padding: 9px 12px; outline: none;
}
.comment-form input:focus, .comment-form textarea:focus { border-color: var(--accent); background: var(--card); }
.comment-form textarea { resize: vertical; }
.cf-honeypot { position: absolute; left: -9999px; height: 0; overflow: hidden; }
.cf-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.cf-actions button {
  font: inherit; font-size: 14px; color: #fff; background: var(--accent); border: 0;
  border-radius: 8px; padding: 9px 22px; cursor: pointer;
}
.cf-actions button:hover { background: var(--accent-hover); }
.cf-note { font-size: 12.5px; color: var(--ink-3); }

/* ---------- 归档 / 分类 ---------- */
.arch-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 10px; }
.arch-item {
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px;
  background: var(--card); border: 1px solid var(--line); border-radius: 9px; padding: 10px 14px; font-size: 14px; color: var(--ink);
}
.arch-item:hover { border-color: var(--accent); text-decoration: none; }
.arch-item.is-active { border-color: var(--accent); background: var(--accent-soft); }
.arch-item em { font-style: normal; font-size: 12.5px; color: var(--ink-3); }
.arch-posts { margin-top: 18px; }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.cat-card {
  display: flex; flex-direction: column; gap: 5px; background: var(--card); border: 1px solid var(--line);
  border-radius: 11px; padding: 18px 20px; color: var(--ink);
}
.cat-card:hover { border-color: var(--accent); text-decoration: none; }
.cat-name { font-family: var(--serif); font-size: 17px; }
.cat-desc { font-size: 13px; color: var(--ink-2); }
.cat-count { font-size: 12.5px; color: var(--ink-3); }
.tag-cloud { margin-top: 10px; }

/* ---------- 分页 ---------- */
.pager { display: flex; align-items: center; justify-content: center; gap: 16px; margin: 34px 0 0; flex-wrap: wrap; }
.page-btn { font-size: 14px; border: 1px solid var(--line-2); background: var(--card); border-radius: 8px; padding: 7px 16px; color: var(--ink-2); }
.page-btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.page-btn.is-disabled { color: var(--ink-3); opacity: .5; }
.page-info { font-size: 13px; color: var(--ink-3); }

/* ---------- 页脚 ---------- */
.site-foot {
  border-top: 1px solid var(--line); background: var(--surface-3);
  padding: 26px 0 calc(34px + env(safe-area-inset-bottom));
  margin-top: 40px;
}
.foot-inner { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; align-items: center; }
.foot-line { font-size: 12.5px; color: var(--ink-3); }
.foot-links { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.foot-links a { color: var(--ink-2); font-size: 12.5px; }
.foot-pay { display: flex; gap: 12px; }

/* ============================================================
   M2 用户体系 · 顶部账户区
   ============================================================ */
.head-actions { display: flex; align-items: center; gap: 12px; }
.userauth { display: flex; align-items: center; gap: 10px; }
.usermenu { position: relative; }
.usermenu > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 7px;
  padding: 3px 10px 3px 3px; border: 1px solid var(--line-2); border-radius: 999px; background: var(--card);
}
.usermenu > summary::-webkit-details-marker { display: none; }
.usermenu > summary:hover { border-color: var(--accent); }
.uname { font-size: 13.5px; color: var(--ink-2); max-width: 92px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.uavatar {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  background: var(--avatar-bg);
  color: var(--avatar-ink);
  font-size: 13px; font-family: var(--serif); line-height: 1;
}
.udrop {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 30;
  min-width: 148px; padding: 6px; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line-2); border-radius: 12px;
  box-shadow: 0 10px 26px var(--shadow);
}
.udrop a { padding: 7px 10px; border-radius: 8px; font-size: 13.5px; color: var(--ink-2); }
.udrop a:hover { background: var(--accent-soft); color: var(--accent); text-decoration: none; }

/* ============================================================
   M2 登录 / 注册 / 个人中心
   ============================================================ */
.auth-wrap { display: flex; justify-content: center; padding: 20px 0 40px; }
.auth-card { width: 100%; max-width: 400px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 30px 28px; }
.auth-title { font-family: var(--serif); font-size: 23px; font-weight: 500; margin: 0 0 6px; letter-spacing: .04em; }
.auth-sub { color: var(--ink-2); font-size: 13.5px; margin: 0 0 20px; }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label, .form-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; color: var(--ink-2); }
.auth-form input, .form-grid input, .form-grid textarea, .form-grid select, .reply-form textarea, .redeem-form input {
  font: inherit; font-size: 14.5px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line-2); border-radius: 9px; padding: 9px 11px; outline: none;
}
.auth-form input:focus, .form-grid input:focus, .form-grid textarea:focus, .form-grid select:focus, .reply-form textarea:focus { border-color: var(--accent); }
.auth-form input:disabled, .form-grid input:disabled { background: var(--disabled-bg); color: var(--ink-3); }
.form-grid textarea { resize: vertical; line-height: 1.7; }
.form-grid.wide { max-width: 100%; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.opt { color: var(--ink-3); font-size: 12px; font-weight: normal; }
.hint { font-size: 12.5px; color: var(--ink-3); margin: 0; }
.row-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.chk { display: flex; flex-direction: row; align-items: center; gap: 6px; font-size: 13.5px; }
.chk input { width: auto; }
.chk-line { flex-direction: row; align-items: center; gap: 8px; }
.auth-foot { margin: 18px 0 0; font-size: 13.5px; color: var(--ink-2); text-align: center; }
.btn.block { width: 100%; justify-content: center; }

.me-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 18px 20px; }
.panel-title { font-family: var(--serif); font-size: 16px; font-weight: 500; margin: 0 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--line); letter-spacing: .04em; }
.panel-title .mini { font-family: var(--sans); font-size: 12px; color: var(--ink-3); }
.form-grid { display: flex; flex-direction: column; gap: 14px; }
.mini-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.mini-list li { display: flex; justify-content: space-between; gap: 10px; align-items: baseline; font-size: 14px; border-bottom: 1px dashed var(--line); padding-bottom: 7px; }
.mini-list li:last-child { border-bottom: 0; }
.redeem-form { display: flex; gap: 8px; align-items: flex-end; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); flex-wrap: wrap; }
.redeem-form label { flex: 1; min-width: 150px; display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--ink-2); }
.profile-bio { color: var(--ink-2); font-size: 14.5px; margin: 0 0 8px; padding-left: 12px; border-left: 2px solid var(--line-2); }
.page-sub { color: var(--ink-2); font-size: 13.5px; margin: 0; }

/* ============================================================
   M2 论坛
   ============================================================ */
.forum-actions { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.forum-actions .search.inline { flex: 1; min-width: 200px; }
.search.inline { display: flex; gap: 8px; align-items: center; border: 0; background: transparent; padding: 0; border-radius: 0; }
.search.inline input { flex: 1; width: auto; border: 1px solid var(--line-2); background: var(--surface); border-radius: 9px; padding: 8px 11px; font-size: 14px; }
.search.inline button { border: 1px solid var(--line-2); background: var(--card); border-radius: 9px; padding: 8px 14px; }

.board-list { display: flex; flex-direction: column; gap: 12px; }
.board-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px;
  color: var(--ink);
}
.board-main { flex: 1; min-width: 0; }
.board-name { font-family: var(--serif); font-size: 17px; font-weight: 500; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.board-desc { margin: 0; color: var(--ink-2); font-size: 13.5px; }
.board-latest { margin: 6px 0 0; font-size: 13px; color: var(--ink-2); }
.board-latest a { color: var(--ink-2); }
.board-stat { text-align: center; flex: none; padding-left: 12px; border-left: 1px solid var(--line); }
.board-stat strong { display: block; font-family: var(--serif); font-size: 19px; color: var(--accent); }
.board-stat span { font-size: 11.5px; color: var(--ink-3); }
@media (hover: hover) {
  .board-card:hover { border-color: var(--line-2); box-shadow: 0 3px 14px var(--shadow-sm); text-decoration: none; }
}

.thread-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.thread-list li { display: flex; flex-direction: column; gap: 4px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.thread-title { font-size: 15.5px; color: var(--ink); display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.thread-title:hover { color: var(--accent); text-decoration: none; }
.thread-meta { font-size: 12.5px; color: var(--ink-3); }
.pin-badge.sm { font-size: 10.5px; padding: 1px 5px; }
.tag-lock, .tag-warn, .tag-admin, .tag-free {
  font-size: 11px; padding: 1px 6px; border-radius: 5px; font-family: var(--sans); white-space: nowrap;
}
.tag-lock { background: var(--disabled-bg); color: var(--ink-2); }
.tag-warn { background: var(--err-bg); color: var(--accent); }
.tag-admin { background: var(--accent-soft); color: var(--accent); }
.tag-free { background: var(--ok-bg); color: var(--ok-ink); }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.crumb a { color: var(--ink-2); }

.thread-head, .thread { margin-bottom: 8px; }
.thread-title-lg { font-family: var(--serif); font-size: clamp(20px, 5.4vw, 24px); font-weight: 500; margin: 0 0 12px; letter-spacing: .02em; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.thread-byline { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-3); padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.by-name { color: var(--ink); font-size: 13.5px; }
.forum-body { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; margin: 18px 0 0; }
.thread-foot { display: flex; gap: 12px; padding: 10px 0 0; flex-wrap: wrap; }

.replies { margin-top: 34px; }
.reply-list { list-style: none; margin: 0 0 20px; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.reply { display: flex; gap: 12px; }
.reply .uavatar { width: 30px; height: 30px; font-size: 14px; }
.reply-main { flex: 1; min-width: 0; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 15px; }
.reply-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 12.5px; color: var(--ink-3); flex-wrap: wrap; }
.reply-body { font-size: 14.5px; }
.reply-body p { margin: 0 0 8px; }
.reply-body p:last-child { margin-bottom: 0; }
.reply-form { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.reply-form textarea { width: 100%; }

/* ============================================================
   M3 课程
   ============================================================ */
.course-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.course-card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: 13px; overflow: hidden; color: var(--ink); }
.course-card img { width: 100%; height: 132px; object-fit: cover; display: block; }
.course-cover-ph { height: 132px; background: linear-gradient(135deg, var(--surface-2), var(--line-2)); }
.course-card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 7px; flex: 1; }
.course-name { font-family: var(--serif); font-size: 16.5px; font-weight: 500; margin: 0; }
.course-summary { margin: 0; font-size: 13px; color: var(--ink-2); line-height: 1.65; flex: 1; }
.course-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
.price { font-family: var(--serif); font-size: 17px; color: var(--accent); }
.price.free { color: var(--ok-ink); }
.price-was { font-size: 12.5px; color: var(--ink-3); text-decoration: line-through; margin-left: 6px; }
.mini.ok, .ok { color: var(--ok-ink); }
@media (hover: hover) {
  .course-card:hover { border-color: var(--line-2); box-shadow: 0 4px 16px var(--shadow-sm); text-decoration: none; }
}

.course-detail-head { display: flex; gap: 24px; align-items: flex-start; margin-bottom: 26px; }
.course-detail-main { flex: 1; min-width: 0; }
.course-detail-cover { flex: none; width: 240px; }
.course-detail-cover img { border-radius: 12px; border: 1px solid var(--line); }
.course-meta { display: flex; align-items: center; gap: 14px; margin: 12px 0 18px; flex-wrap: wrap; }
.course-action { margin-bottom: 10px; }
.pending-tip, .owned-tip { margin: 8px 0 0; }
.btn.lg { padding: 10px 22px; font-size: 15px; }
.btn.is-disabled, .btn:disabled { opacity: .45; cursor: default; pointer-events: none; }

.lesson-list { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--card); }
.lesson-row { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14.5px; }
.lesson-row:last-child { border-bottom: 0; }
a.lesson-row:hover { background: var(--accent-soft); text-decoration: none; }
.lesson-row.is-locked { color: var(--ink-3); }
.lesson-no { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); flex: none; }
.lesson-name { flex: 1; min-width: 0; }
.course-pay { margin-top: 30px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.course-pay p { font-size: 14px; color: var(--ink-2); margin: 0 0 12px; }
.pay-links { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }

.lesson-video { margin: 18px 0; }
.lesson-video iframe, .lesson-video video { width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: 12px; background: #000; }
.lesson-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.lesson-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); }

.order-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin-bottom: 22px; }
.order-row { display: flex; justify-content: space-between; gap: 14px; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; flex-wrap: wrap; }
.order-row:last-child { border-bottom: 0; }
.order-row > span:first-child { color: var(--ink-2); }
.order-list { list-style: none; margin: 0; padding: 0; }
.order-list li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; flex-wrap: wrap; }

/* ============================================================
   M4 辞典
   ============================================================ */
.dict-search { display: flex; gap: 10px; margin-bottom: 26px; flex-wrap: wrap; }
.dict-search input {
  flex: 1; min-width: 180px; font: inherit; font-size: 16px; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line-2); border-radius: 10px; padding: 11px 14px; outline: none;
}
.dict-search input:focus { border-color: var(--accent); }
.dict-search select { font: inherit; font-size: 14px; border: 1px solid var(--line-2); border-radius: 10px; padding: 10px; background: var(--surface); color: var(--ink); }
.dict-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-bottom: 10px; }
.dict-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 15px 17px; }
.dict-card h3 { font-family: var(--serif); font-size: 16.5px; font-weight: 500; margin: 0 0 5px; }
.dict-card p { margin: 0; }
.dict-samples { display: flex; flex-wrap: wrap; gap: 8px; }
.dict-sample {
  display: inline-flex; align-items: baseline; gap: 7px;
  background: var(--card); border: 1px solid var(--line-2); border-radius: 8px; padding: 6px 11px;
  font-size: 14px; color: var(--ink);
}
.dict-sample:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.dict-term { background: var(--card); border: 1px solid var(--line); border-radius: 13px; padding: 22px 24px; }
.dict-term-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--line); }
.dict-term-name { font-family: var(--serif); font-size: clamp(22px, 6.4vw, 27px); font-weight: 500; margin: 0; letter-spacing: .03em; }
.dict-pinyin { font-family: var(--mono); font-size: 13.5px; color: var(--ink-3); }
.dict-body { font-size: clamp(15px, 4.2vw, 15.5px); line-height: 1.95; }
.dict-body p { margin: 0 0 11px; text-indent: 0; }
.dict-body strong { font-weight: 600; }
.dict-link { color: var(--link); border-bottom: 1px dashed rgba(61, 107, 96, .45); }
.dict-link:hover { text-decoration: none; border-bottom-style: solid; background: rgba(61, 107, 96, .07); }
.dict-fig { display: inline-block; font-size: 12px; color: var(--ink-3); background: var(--surface-2); border-radius: 5px; padding: 0 6px; margin: 0 2px; }
.dict-direct { margin-bottom: 26px; }
.dict-hit-list { list-style: none; margin: 0; padding: 0; }
.dict-hit-list li { padding: 12px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: auto auto 1fr; gap: 6px 12px; align-items: baseline; }
.dict-hit-name { font-family: var(--serif); font-size: 16.5px; color: var(--ink); }
.dict-hit-name:hover { color: var(--accent); text-decoration: none; }
.dict-hit-sum { grid-column: 1 / -1; font-size: 13px; color: var(--ink-2); line-height: 1.7; }
.dict-nav { display: flex; justify-content: space-between; gap: 10px; align-items: center; margin-top: 26px; flex-wrap: wrap; }
mark { background: var(--mark-bg); color: inherit; padding: 0 2px; border-radius: 3px; }
.steps { margin: 0; padding-left: 20px; font-size: 14px; color: var(--ink-2); }
.steps li { margin-bottom: 10px; }
.steps code, .dict-search + p code { font-family: var(--mono); font-size: 12.5px; background: var(--surface-2); border-radius: 4px; padding: 1px 5px; }

/* ==========================================================================
   自适应
   ========================================================================== */

/* ---------- 宽屏（≥1120px）：把空间用起来 ---------- */
@media (min-width: 1120px) {
  /* 列表型页面把容器放宽，卡片改双栏；长文页保持窄栏（见 body.is-wide） */
  body.is-wide .wrap { max-width: var(--wide); }
  body.is-wide .list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
  body.is-wide .list .pager { grid-column: 1 / -1; }
  .course-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .dict-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cat-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  /* 个人中心在宽屏下把兑换区并排 */
  .me-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 平板（≤900px）---------- */
@media (max-width: 900px) {
  .head-inner { gap: 14px; }
  .post { padding: 28px 26px 22px; }
  .me-grid { grid-template-columns: 1fr; }
  .dict-cards { grid-template-columns: 1fr; }
}

/* ---------- 手机（≤700px）---------- */
@media (max-width: 700px) {
  :root { --head-h: 54px; }

  /* 页头折两行：品牌 + 操作 一行，导航一整行横向滑动 */
  .head-inner { height: auto; padding: 9px 0; flex-wrap: wrap; gap: 8px; }
  .brand-sub { display: none; }
  .nav {
    order: 3; width: 100%; margin-left: 0; gap: 18px;
    flex-wrap: nowrap; overflow-x: auto; overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch; scrollbar-width: none;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav-link {
    flex: none; min-height: 34px; display: inline-flex; align-items: center;
    padding: 6px 0;
  }
  .head-actions { margin-left: auto; gap: 8px; }
  .userauth .nav-link { min-height: 34px; display: inline-flex; align-items: center; }
  .search input { width: 84px; }

  /* 正文与卡片 */
  .post { padding: 22px 18px 18px; border-radius: 10px; }
  .card { padding: 18px 18px; border-radius: 10px; }
  .card.has-cover { grid-template-columns: 1fr; gap: 14px; }
  .card-cover { grid-column: 1; grid-row: 1; }
  .card.has-cover .card-body { grid-column: 1; grid-row: 2; }
  .card > .pin-badge { right: 18px; }
  .card.has-cover > .pin-badge { left: 18px; }
  .related, .comments { padding-left: 18px; padding-right: 18px; }
  .cf-row { grid-template-columns: 1fr; }
  .post-body pre.code { padding: 14px; }
  .table-wrap { margin-left: -4px; margin-right: -4px; }

  /* 论坛 */
  .forum-actions { flex-direction: column; align-items: stretch; }
  .forum-actions .btn { text-align: center; }
  .forum-actions .search.inline { min-width: 0; }
  .board-card { flex-direction: column; align-items: flex-start; gap: 10px; }
  .board-stat { border-left: 0; padding-left: 0; text-align: left; display: flex; gap: 6px; align-items: baseline; }
  .board-stat strong { font-size: 16px; }
  .forum-body { padding: 16px 16px; }
  .reply .uavatar { width: 26px; height: 26px; font-size: 12.5px; }

  /* 课程 */
  .course-grid { grid-template-columns: 1fr; }
  .course-detail-head { flex-direction: column; gap: 16px; }
  .course-detail-cover { width: 100%; }
  .lesson-row { padding: 12px 14px; gap: 9px; font-size: 14px; }
  .lesson-nav { flex-direction: column; }
  .lesson-nav .btn { text-align: center; }

  /* 辞典 */
  .dict-cards { grid-template-columns: 1fr; }
  .dict-term { padding: 18px 16px; border-radius: 10px; }
  .dict-hit-list li { grid-template-columns: 1fr; gap: 4px; }
  .dict-nav { flex-direction: column; align-items: stretch; }
  .dict-nav > * { text-align: center; }

  /* 其它 */
  .me-grid, .grid-3 { grid-template-columns: 1fr; }
  .auth-card { padding: 24px 20px; }
  .panel { padding: 16px 15px 18px; }
  .foot-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- 小屏手机（≤400px）---------- */
@media (max-width: 400px) {
  body { font-size: 15px; }
  .brand-title { font-size: 18px; }
  .search { padding-left: 10px; }
  .search input { width: 62px; }
  .uname { max-width: 64px; }
  .card { padding: 16px 15px; }
  .post { padding: 18px 14px 16px; }
  .related, .comments { padding-left: 14px; padding-right: 14px; }
  .dict-term { padding: 16px 13px; }
  .arch-list { grid-template-columns: 1fr 1fr; }
  .pager { gap: 10px; }
}

/* ---------- 触屏设备（无悬停 / 粗指针）----------
   iOS Safari 在聚焦字号 <16px 的输入框时会自动放大整页，是所有移动端
   表单“莫名其妙被放大”的根因；这里统一抬到 16px。 */
@media (hover: none), (pointer: coarse) {
  input:not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]),
  select,
  textarea { font-size: 16px !important; }
  /* 点按目标抬到 40px 以上，避免“点不准” */
  .nav-link { min-height: 40px; display: inline-flex; align-items: center; }
  .chip { padding: 7px 12px; }
  .page-btn { padding: 10px 18px; }
  .dict-sample { padding: 9px 13px; }
  .arch-item { padding: 12px 14px; }
  .tab, .tabs .tab { padding: 8px 14px; }
  /* 触屏没有 hover，别让按下后的高亮粘住 */
  .card:hover, .board-card:hover, .course-card:hover, .cat-card:hover, .arch-item:hover { border-color: var(--line); box-shadow: none; }
}
/* 竖屏手机 + 触屏：搜索框交给 16px，把胶囊放宽一点 */
@media (max-width: 700px) and (pointer: coarse) {
  .search input { width: 96px; }
}

/* ---------- 深色模式（跟随系统）---------- */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --paper: #171614;
    --card: #1f1e1b;
    --surface: #232220;
    --surface-2: #2b2926;
    --surface-3: #1b1a18;
    --quote-bg: #232220;
    --disabled-bg: #262421;
    --head-bg: rgba(23, 22, 20, .9);

    --ink: #e9e4da;
    --ink-2: #aca49a;
    --ink-3: #7e776d;
    --line: #302e2a;
    --line-2: #423e38;

    --accent: #d97a5f;
    --accent-hover: #e5896e;
    --accent-soft: #3a2721;
    --link: #7fb3a5;

    --ok-ink: #7ec9a5;
    --ok-bg: #1c2a24;
    --ok-line: #2c4438;
    --err-ink: #e5917b;
    --err-bg: #2c1e1a;
    --err-line: #462b23;

    --mark-bg: #5a4620;
    --shadow: rgba(0, 0, 0, .5);
    --shadow-sm: rgba(0, 0, 0, .35);

    --avatar-bg: hsl(var(--h, 20), 22%, 26%);
    --avatar-ink: hsl(var(--h, 20), 45%, 78%);
  }
  /* 纸面质感在深色下用一层极淡的暖光，避免死黑 */
  body { background-image: radial-gradient(120% 80% at 50% -10%, rgba(217, 122, 95, .05), transparent 60%); background-attachment: fixed; }
  .cf-actions button { color: #1a1512; font-weight: 500; }
  .btn.primary { color: #1a1512; }
  img { opacity: .92; }
  .post-body pre.code, .preview pre { background: #1b1a18; }
}

/* ---------- 打印 ---------- */
@media print {
  :root { color-scheme: light; }
  body {
    background: #fff; color: #000; font-size: 11.5pt; line-height: 1.6;
    background-image: none !important;
  }
  .site-head, .site-foot, .pager, .post-nav, .related, .comments,
  .chips, .pin-badge, .thread-foot, .reply-form, .course-pay,
  .dict-search, .dict-nav, .dict-samples, .forum-actions, .crumb { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .post, .dict-term, .forum-body, .panel, .card, .order-card {
    border: 0; border-radius: 0; padding: 0; background: #fff; box-shadow: none;
  }
  .post-body pre.code { background: #f4f4f4; white-space: pre-wrap; word-break: break-word; }
  a { color: #000; text-decoration: underline; }
  img { max-width: 100% !important; }
  /* 打印时把外链地址补出来 */
  .post-body a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}