/* ==========================================================
   论文阅读页 · Word 排版风格 + 段落批注
   ========================================================== */
:root {
  --bg: #f3f0e8;
  --panel: #fffdf6;
  --panel-2: #faf7ee;
  --ink: #2e2c26;
  --muted: #6f6a5d;
  --line: #e2dcc9;
  --accent: #3f6f54;
  --danger: #b91c1c;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(60, 55, 40, 0.12);
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px; line-height: 1.65;
}
button { font-family: inherit; cursor: pointer; }
a { color: var(--accent); }

/* ---------- 密码门（与全站统一） ---------- */
body.locked { overflow: hidden; }
body.locked .topbar, body.locked .doc-wrap { visibility: hidden; }
#gateOverlay {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center; background: var(--bg);
}
#gateForm { width: min(360px, 88vw); }
.gate-box {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); padding: 30px 28px; text-align: center;
}
.gate-title { font-weight: 700; font-size: 1.1rem; }
.gate-sub { color: var(--muted); font-size: 0.92rem; margin: 8px 0 18px; }
#gateInput {
  width: 100%; padding: 10px 12px; font-size: 1rem; text-align: center;
  border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
}
.gate-btn {
  width: 100%; margin-top: 12px; padding: 10px; font-size: 1rem;
  border: 1px solid var(--accent); border-radius: 8px; background: var(--accent); color: #fff;
}
.gate-err { color: var(--danger); font-size: 0.9rem; margin-top: 10px; min-height: 1.2em; }

/* ---------- 顶部条 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; gap: 16px;
  padding: 10px 20px; background: var(--panel);
  border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
}
.topbar .brand { font-weight: 700; }
.topbar .crumb { color: var(--muted); font-size: 0.94rem; }
.topbar .spacer { flex: 1; }
.topbar .tbtn {
  border: 1px solid var(--line); background: var(--panel-2); color: var(--ink);
  border-radius: 999px; padding: 6px 14px; font-size: 0.94rem;
}
.topbar .tbtn:hover { border-color: var(--accent); }
.cmt-total { color: var(--muted); font-size: 0.94rem; }

/* ---------- Word 纸张 ---------- */
.doc-wrap { padding: 28px 16px 120px; }
.sheet {
  position: relative;
  width: min(860px, 100%); margin: 0 auto;
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 4px 18px rgba(60, 55, 40, 0.14);
  padding: 88px 90px 96px;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 12pt; line-height: 1.6; color: #1a1a1a;
}
.sheet p { margin: 0 0 10pt; }
.sheet h1 { font-size: 18pt; margin: 18pt 0 10pt; }
.sheet h2 { font-size: 15pt; margin: 16pt 0 8pt; }
.sheet h3 { font-size: 13pt; margin: 14pt 0 6pt; }
.sheet h4 { font-size: 12pt; margin: 12pt 0 6pt; font-style: italic; }
.sheet table { border-collapse: collapse; width: 100%; margin: 10pt 0; font-size: 10.5pt; }
.sheet td, .sheet th { border: 1px solid #999; padding: 4pt 6pt; vertical-align: top; }
.sheet img { max-width: 100%; height: auto; display: block; margin: 8pt auto; }
.sheet .table-title, .sheet .figure-title { font-weight: 700; margin-top: 14pt; }
.sheet .table-note { font-size: 10pt; color: #444; font-style: italic; }
.sheet ul, .sheet ol { margin: 0 0 10pt 24pt; }

/* ---------- 段落块（Notion 式块状阅读 + 批注锚点） ---------- */
.blk {
  position: relative;
  padding: 7px 46px 7px 12px;
  margin: 0 -12px 2px;
  border: 1px solid transparent; border-radius: 8px;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.blk:hover {
  background: #fff; border-color: var(--line); box-shadow: var(--shadow);
}
.blk.has-cmt { background: #fdf3e0; border-color: #ecd9b0; }
.blk.has-cmt:hover { box-shadow: var(--shadow); }

/* 块内「+」批注按钮：悬停本块才出现，不会出现点不到的问题 */
.blk .add-cmt {
  position: absolute; right: 8px; top: 6px; z-index: 5;
  width: 26px; height: 26px; border-radius: 50%; border: none;
  background: var(--accent); color: #fff; font-size: 17px; line-height: 1;
  display: none; box-shadow: var(--shadow); font-family: sans-serif; padding: 0;
}
.blk:hover .add-cmt { display: block; }
.blk .add-cmt:hover { transform: scale(1.15); }

/* 批注数徽章（在「+」左侧） */
.blk .cmt-badge {
  position: absolute; right: 40px; top: 8px;
  min-width: 22px; height: 22px; border-radius: 11px;
  background: var(--accent); color: #fff; font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: "Microsoft YaHei", sans-serif; cursor: pointer; padding: 0 6px;
}
#hoverAdd { display: none !important; }

/* ---------- 批注侧栏 ---------- */
#cmtSidebar {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 70;
  width: min(400px, 92vw); background: var(--panel);
  border-left: 1px solid var(--line); box-shadow: -4px 0 18px rgba(60,55,40,0.15);
  display: none; flex-direction: column;
}
#cmtSidebar.open { display: flex; }
#cmtSidebar .sb-head {
  padding: 14px 16px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
}
#cmtSidebar .sb-head h3 { margin: 0; font-size: 1rem; flex: 1; }
#cmtSidebar .sb-close { border: none; background: none; font-size: 20px; color: var(--muted); }
.sb-excerpt {
  margin: 12px 16px; padding: 10px 12px; font-size: 0.9rem; color: var(--muted);
  background: var(--panel-2); border-left: 3px solid var(--accent); border-radius: 6px;
  max-height: 120px; overflow: auto;
}
.sb-list { flex: 1; overflow-y: auto; padding: 0 16px; }
.cmt-item { border-bottom: 1px dashed var(--line); padding: 10px 0; }
.cmt-item .ci-head { display: flex; gap: 8px; align-items: baseline; font-size: 0.92rem; }
.cmt-item .ci-author { font-weight: 700; }
.cmt-item .ci-time { color: var(--muted); font-size: 0.82rem; margin-left: auto; }
.cmt-item .ci-body { margin-top: 4px; font-size: 0.97rem; white-space: pre-wrap; word-break: break-word; }
.sb-empty { color: var(--muted); text-align: center; padding: 22px 0; font-size: 0.94rem; }
.sb-form { border-top: 1px solid var(--line); padding: 12px 16px 16px; }
.sb-form textarea {
  width: 100%; min-height: 74px; resize: vertical; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 0.97rem; font-family: inherit;
}
.sb-form .sb-idline { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 0.9rem; color: var(--muted); }
.sb-form .sb-idline button { border: none; background: none; color: var(--accent); font-size: 0.9rem; padding: 0; }
.sb-form .sb-submit {
  margin-top: 10px; width: 100%; padding: 9px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 0.98rem;
}
.sb-form .sb-submit:disabled { opacity: 0.55; cursor: default; }

/* ---------- 身份弹窗 ---------- */
#idModal {
  position: fixed; inset: 0; z-index: 90; display: none;
  align-items: center; justify-content: center; background: rgba(46, 44, 38, 0.35);
}
#idModal.open { display: flex; }
.id-box {
  background: var(--panel); border-radius: 14px; box-shadow: var(--shadow);
  padding: 26px 26px 22px; width: min(380px, 90vw);
}
.id-box h3 { margin: 0 0 6px; font-size: 1.05rem; }
.id-box p { color: var(--muted); font-size: 0.92rem; margin: 0 0 14px; }
.id-box input {
  width: 100%; padding: 9px 11px; margin-bottom: 10px; font-size: 0.97rem;
  border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.id-box .id-save {
  width: 100%; padding: 9px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 0.98rem;
}
.id-err { color: var(--danger); font-size: 0.88rem; min-height: 1.1em; margin-bottom: 6px; }

/* ---------- 轻提示 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 9px 18px; border-radius: 999px;
  font-size: 0.94rem; opacity: 0; transition: opacity 0.25s; z-index: 99; pointer-events: none;
}
.toast.show { opacity: 0.92; }

/* ---------- 移动端 ---------- */
@media (max-width: 900px) {
  .sheet { padding: 48px 16px 64px; font-size: 11.5pt; }
  .blk { padding-right: 42px; }
  .blk .cmt-badge { right: 38px; }
}

/* ---------- 左侧目录导航 ---------- */
#toc {
  position: fixed; left: 0; top: 57px; bottom: 0; z-index: 50;
  width: 260px; overflow-y: auto;
  background: var(--panel); border-right: 1px solid var(--line);
  padding: 16px 0 40px; display: none;
}
#toc .toc-title {
  font-weight: 700; font-size: 0.95rem; color: var(--muted);
  padding: 0 18px 10px; letter-spacing: 2px;
}
#toc ul { list-style: none; margin: 0; padding: 0; }
#toc li a {
  display: block; padding: 5px 18px; color: var(--ink); text-decoration: none;
  font-size: 0.88rem; line-height: 1.45;
  border-left: 3px solid transparent;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
#toc li.toc-h2 a { padding-left: 34px; font-size: 0.85rem; color: var(--muted); }
#toc li.toc-h3 a { padding-left: 50px; font-size: 0.82rem; color: var(--muted); }
#toc li a:hover { background: var(--panel-2); color: var(--accent); }
#toc li a.active {
  border-left-color: var(--accent); color: var(--accent);
  background: var(--panel-2); font-weight: 700;
}
#tocToggle {
  position: fixed; left: 14px; bottom: 18px; z-index: 55;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  border-radius: 999px; padding: 8px 16px; font-size: 0.9rem;
  box-shadow: var(--shadow); display: none;
}
/* 宽屏：目录常驻，正文右移 */
@media (min-width: 1280px) {
  #toc { display: block; }
  .doc-wrap { padding-left: 292px; }
  .sheet { margin-left: 0; margin-right: auto; }
}
/* 窄屏：目录抽屉式 */
@media (max-width: 1279px) {
  #toc { box-shadow: 4px 0 18px rgba(60,55,40,0.15); }
  #toc.open { display: block; }
  #tocToggle { display: block; }
}

/* ---------- 作者回复 & 讨论串 ---------- */
.cmt-replies { margin-left: 14px; border-left: 2px solid var(--line); padding-left: 10px; }
.cmt-item.author-reply {
  border-left: 3px solid var(--accent); background: #f0f7f2;
  border-radius: 6px; padding: 8px 10px; margin: 4px 0;
}
.ci-tag-author {
  display: inline-block; background: var(--accent); color: #fff;
  font-size: 0.72rem; padding: 1px 7px; border-radius: 999px; vertical-align: 1px;
}
.ci-actions { margin-top: 4px; }
.reply-toggle {
  border: none; background: none; color: var(--accent);
  font-size: 0.85rem; padding: 0;
}
.reply-toggle:hover { text-decoration: underline; }
.reply-box { margin-top: 6px; }
.reply-box textarea {
  width: 100%; min-height: 56px; resize: vertical; padding: 7px 9px;
  border: 1px solid var(--line); border-radius: 8px;
  font-size: 0.92rem; font-family: inherit;
}
.reply-submit {
  margin-top: 6px; padding: 6px 14px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 0.88rem;
}
.reply-submit:disabled { opacity: 0.55; cursor: default; }