/* ============================================================
   上岸舱 · 测绘学硕学习台 —— 样式（自研设计：深空导航 + 等高线地形美学）
   ============================================================ */

:root {
  --bg: #f3f6fa;
  --bg2: #eef2f7;
  --card: #ffffff;
  --ink: #16233b;
  --ink2: #5b6b83;
  --line: #e4eaf2;
  --acc: #0ea5a4;
  --acc2: #06b6d4;
  --grad: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
  --grad2: linear-gradient(135deg, #0f2b46 0%, #114a56 55%, #0b6b6b 100%);
  --sideW: 236px;
  --danger: #ef4444;
  --warn: #b45309;
  --ok: #059669;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 10px 30px -12px rgba(15, 23, 42, .12);
}
[data-theme="dark"] {
  --bg: #0b1220;
  --bg2: #0f172a;
  --card: #111c30;
  --ink: #e5eefb;
  --ink2: #8fa3bf;
  --line: #1e2b45;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -12px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.55;
  font-variant-numeric: tabular-nums;
}
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0 0 10px; }
h3 { font-size: 15.5px; letter-spacing: .2px; }
p { margin: 6px 0; }
a { color: var(--acc2); text-decoration: none; }
code { background: rgba(6, 182, 212, .12); color: var(--acc); padding: 1px 6px; border-radius: 6px; font-size: 12.5px; }
.muted { color: var(--ink2); }
.small { font-size: 12.5px; }
.pad { padding: 14px; }
.flex1 { flex: 1; min-width: 0; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap, .chip-row.wrap { flex-wrap: wrap; }
.gap { gap: 8px; }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
.hidden, [hidden] { display: none !important; }

/* ================= 布局 ================= */
#app { display: flex; min-height: 100vh; }

#sidebar {
  width: var(--sideW); flex: 0 0 var(--sideW);
  background: linear-gradient(180deg, #0d1b2e 0%, #0f2740 100%);
  color: #cfe2f3;
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
  padding: 18px 14px;
  z-index: 5;
}
[data-theme="dark"] #sidebar { background: linear-gradient(180deg, #0a1524 0%, #0c1e33 100%); }
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--grad); display: flex; align-items: center; justify-content: center;
  font-size: 20px; box-shadow: 0 6px 18px -6px rgba(6, 182, 212, .8);
}
.brand b { color: #fff; font-size: 16.5px; letter-spacing: .5px; }
.brand span { display: block; font-size: 10.5px; color: #7fa4c0; letter-spacing: 1px; }

.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border: 0; background: transparent;
  color: #9db8d2; border-radius: 12px; cursor: pointer;
  font-size: 14px; text-align: left; position: relative;
  transition: background .15s, color .15s, transform .1s;
}
.nav-item svg { width: 19px; height: 19px; flex: 0 0 19px; }
.nav-item:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.nav-item.active {
  background: linear-gradient(90deg, rgba(6, 182, 212, .25), rgba(16, 185, 129, .12));
  color: #fff; font-weight: 600;
}
.nav-item.active::before {
  content: ""; position: absolute; left: -14px; top: 22%;
  width: 4px; height: 56%; border-radius: 4px; background: var(--acc2);
}
.nav-badge {
  margin-left: auto; background: var(--danger); color: #fff;
  font-size: 10.5px; min-width: 18px; height: 18px; border-radius: 9px;
  display: inline-flex; align-items: center; justify-content: center; padding: 0 5px;
}
.sidebar-foot { font-size: 11.5px; color: #7fa4c0; padding: 10px 8px 0; border-top: 1px solid rgba(255, 255, 255, .08); }
.sidebar-foot .data-tools { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.sidebar-foot button {
  background: rgba(255,255,255,.08); color: #cfe2f3; border: 0; border-radius: 8px;
  padding: 4px 9px; font-size: 11.5px; cursor: pointer;
}
.sidebar-foot button:hover { background: rgba(255,255,255,.16); }

/* ---------------- 主区 ---------------- */
#main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
#topbar {
  position: sticky; top: 0; z-index: 4;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 26px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
#viewTitle { font-size: 17px; font-weight: 700; margin: 0; }
#cdChip {
  margin-left: auto; background: var(--card); border: 1px solid var(--line);
  padding: 7px 14px; border-radius: 999px; box-shadow: var(--shadow);
  color: var(--ink); white-space: nowrap;
}
#cdChip b { color: var(--acc); }
.icon-btn {
  width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; font-size: 16px;
}
.icon-btn:hover { border-color: var(--acc2); }

#content { padding: 20px 26px 60px; max-width: 1180px; width: 100%; margin: 0 auto; }

/* ---------------- 卡片与通用 ---------------- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 20px; margin-bottom: 16px;
}
.grid-2 { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

.btn {
  background: var(--grad); color: #fff; border: 0; cursor: pointer;
  padding: 9px 16px; border-radius: 11px; font-weight: 600; font-size: 13.5px;
  box-shadow: 0 6px 16px -8px rgba(6, 182, 212, .7);
  transition: transform .1s, filter .15s;
  white-space: nowrap;
}
.btn:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn:disabled { filter: grayscale(.5); opacity: .6; cursor: not-allowed; transform: none; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
.btn.ghost:hover { border-color: var(--acc2); color: var(--acc2); }
.btn.sm { padding: 6px 11px; font-size: 12.5px; border-radius: 9px; }

.chip {
  background: var(--bg2); border: 1px solid var(--line); color: var(--ink);
  border-radius: 999px; padding: 7px 14px; cursor: pointer; font-size: 13px;
  transition: all .15s; white-space: nowrap;
}
.chip:hover { border-color: var(--acc2); color: var(--acc2); }
.chip.on { background: var(--grad); color: #fff; border-color: transparent; font-weight: 600; }
.chip-row { display: flex; gap: 8px; align-items: center; margin: 8px 0; }

input[text], input[type="text"], input[type="password"], input[type="number"], input[type="datetime-local"], select, textarea {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 11px; outline: none; min-width: 0; color: var(--ink);
}
input:focus, select:focus, textarea:focus { border-color: var(--acc2); box-shadow: 0 0 0 3px rgba(6, 182, 212, .15); }
textarea { resize: vertical; width: 100%; }
select { cursor: pointer; }

/* ---------------- 仪表盘 Hero ---------------- */
.hero {
  display: flex; gap: 20px; align-items: stretch;
  background: var(--grad2); color: #fff; border: 0;
  position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='420' height='420' viewBox='0 0 420 420'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.07' stroke-width='1'%3E%3Cpath d='M-20 320 Q 90 250 180 300 T 440 280'/%3E%3Cpath d='M-30 250 Q 80 160 200 215 T 450 190'/%3E%3Cpath d='M-20 180 Q 100 90 210 140 T 440 100'/%3E%3Cpath d='M0 100 Q 110 30 240 70 T 460 30'/%3E%3Cpath d='M60 -20 Q 140 60 220 40 T 440 -40'/%3E%3Ccircle cx='330' cy='210' r='60'/%3E%3Ccircle cx='330' cy='210' r='100'/%3E%3Ccircle cx='330' cy='210' r='140'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 420px;
}
.hero-main { position: relative; z-index: 1; flex: 1; }
.hero-tag {
  display: inline-block; font-size: 11.5px; letter-spacing: 1px;
  background: rgba(255, 255, 255, .13); padding: 4px 12px; border-radius: 999px;
  margin-bottom: 12px; color: #d9fbff;
}
.hero h1 { font-size: 26px; letter-spacing: .5px; text-shadow: 0 2px 12px rgba(0, 60, 90, .3); }
.hero p { color: #b7d9e8; }
.hero-count { display: flex; align-items: baseline; gap: 10px; margin: 6px 0 2px; }
.hero-days {
  font-size: 66px; font-weight: 800; line-height: 1;
  background: linear-gradient(180deg, #a7f3d0, #67e8f9);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-unit { color: #b7d9e8; }
.hero-stage { font-size: 13px; color: #d3ecf7; background: rgba(0, 0, 0, .18); display: inline-block; padding: 6px 13px; border-radius: 9px; margin-top: 10px; }
.hero-side { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 10px; justify-content: center; min-width: 150px; }
.stat-mini {
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 13px; padding: 10px 16px; text-align: center;
}
.stat-mini b { display: block; font-size: 21px; color: #9ff0e2; }
.stat-mini span { font-size: 11px; color: #b7d9e8; }

/* ---------------- 时间轴 ---------------- */
.timeline { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; margin-top: 6px; }
@media (max-width: 1000px) { .timeline { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 620px) { .timeline { grid-template-columns: repeat(2, 1fr); } }
.tl-item { position: relative; padding: 12px 10px 10px 14px; border-radius: 12px; background: var(--bg2); border: 1px solid var(--line); }
.tl-dot { position: absolute; top: 18px; left: -0px; width: 8px; height: 8px; border-radius: 50%; background: var(--acc2); box-shadow: 0 0 0 3px rgba(6, 182, 212, .18); }
.tl-item.done .tl-dot { background: #94a3b8; box-shadow: none; }
.tl-item.now .tl-dot { background: var(--danger); animation: pulse 1.6s infinite; box-shadow: 0 0 0 4px rgba(239, 68, 68, .15); }
.tl-item.soon .tl-dot { background: var(--acc2); }
.tl-item.later .tl-dot { background: var(--ink2); }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.35); } }
.tl-date { font-size: 11px; color: var(--ink2); }
.tl-name { font-weight: 700; font-size: 13.5px; margin: 2px 0; }
.tl-note { font-size: 11px; color: var(--ink2); }
.tl-item.now { border-color: rgba(239, 68, 68, .5); background: rgba(239, 68, 68, .06); }
.tl-item.soon { border-color: rgba(6, 182, 212, .4); }

/* ---------------- 任务 ---------------- */
.task-list { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.task-row {
  display: flex; align-items: center; gap: 9px;
  background: var(--bg2); border: 1px solid var(--line);
  border-radius: 11px; padding: 9px 12px; font-size: 13.5px;
}
.task-row.done .task-text { text-decoration: line-through; color: var(--ink2); }
.task-row input[type="checkbox"] { width: 17px; height: 17px; accent-color: var(--acc); cursor: pointer; }
.subj-dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 9px; }
.subj-dot.lg { width: 13px; height: 13px; flex: 0 0 13px; }
.mins-in { width: 70px; text-align: center; font-size: 12.5px; }
.vdel {
  border: 0; background: transparent; color: var(--ink2); cursor: pointer;
  font-size: 13px; padding: 2px 6px; border-radius: 7px; opacity: .75;
}
.vdel:hover { color: var(--danger); background: rgba(239, 68, 68, .09); opacity: 1; }
[contenteditable="true"] { outline: none; border-radius: 6px; padding: 2px 6px; }
[contenteditable="true"]:focus { background: rgba(6, 182, 212, .08); }
task-row select { font-size: 12px; padding: 4px 8px; }

/* 进度环 */
.rings { display: flex; gap: 6px; flex-wrap: wrap; justify-content: space-around; }
.ring-item { position: relative; text-align: center; width: 118px; }
.ring-item svg { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 7; }
.ring-fg { fill: none; stroke-width: 7; stroke-linecap: round; transition: stroke-dashoffset .5s; }
.ring-num { position: absolute; top: 33px; left: 0; right: 0; font-weight: 800; font-size: 17px; }
.ring-name { font-size: 13px; font-weight: 600; margin-top: 4px; }
.ring-label { font-size: 10.5px; min-height: 24px; }

/* 图表 */
#statChart { width: 100%; height: 170px; display: block; }

/* 快捷入口 */
.quick-tiles { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
@media (max-width: 900px) { .quick-tiles { grid-template-columns: repeat(3, 1fr); } }
.tile {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 8px; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--ink);
  box-shadow: var(--shadow); transition: transform .12s, border-color .12s;
}
.tile:hover { transform: translateY(-3px); border-color: var(--acc2); color: var(--acc2); }

/* ---------------- 工具条 ---------------- */
.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }

/* ---------------- 视频区 ---------------- */
.vgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 13px; }
.vcard {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: 13px; padding: 12px; cursor: pointer;
  transition: transform .12s, border-color .12s; box-shadow: var(--shadow);
}
.vcard:hover { transform: translateY(-3px); border-color: var(--acc2); }
.vcard.sel { border-color: var(--acc2); box-shadow: 0 0 0 2px rgba(6, 182, 212, .25), var(--shadow); }
.vthumb {
  height: 74px; border-radius: 9px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; color: #fff;
  background: linear-gradient(135deg, #0f2b46, #0b6b6b), radial-gradient(circle at 70% 30%, rgba(255,255,255,.25), transparent 40%);
  background-blend-mode: screen;
  margin-bottom: 8px;
}
.vname { font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vbar, .bbar { height: 5px; border-radius: 4px; background: var(--line); margin: 7px 0 5px; overflow: hidden; }
.vbar i, .bbar i { display: block; height: 100%; border-radius: 4px; background: var(--grad); }
.vmeta, .bmeta { font-size: 11px; }
.vcard .vdel { position: absolute; top: 8px; right: 8px; background: rgba(0,0,0,.12); border-radius: 7px; color:#fff; }

.player-card { padding: 12px; }
.player-wrap { border-radius: 12px; overflow: hidden; background: #000; aspect-ratio: 16 / 9; }
.player-wrap video { width: 100%; height: 100%; display: block; background: #000; }
.player-ctl { display: flex; align-items: center; gap: 8px; padding: 10px 4px 2px; flex-wrap: wrap; }
.ptitle { font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player-notes { display: flex; gap: 8px; padding: 8px 4px 4px; }
.player-notes input { flex: 1; }
.note-list { display: flex; flex-direction: column; gap: 5px; padding: 4px; max-height: 180px; overflow: auto; }
.note-row { display: flex; gap: 8px; align-items: center; background: var(--bg2); border: 1px solid var(--line); border-radius: 9px; padding: 6px 10px; font-size: 12.5px; cursor: pointer; }
.note-row:hover { border-color: var(--acc2); }
.note-row b { color: var(--acc); font-variant-numeric: tabular-nums; }

/* ---------------- 书架 / 阅读器 ---------------- */
.bgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 13px; }
.bcard {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: 13px; padding: 12px; cursor: pointer; box-shadow: var(--shadow);
  transition: transform .12s, border-color .12s;
}
.bcard:hover { transform: translateY(-3px); border-color: var(--acc2); }
.bcover {
  height: 120px; border-radius: 10px; margin-bottom: 8px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  background: repeating-linear-gradient(135deg, #f0fdfa 0 12px, #ecfeff 12px 24px), var(--card);
  border: 1px solid rgba(6, 182, 212, .25); font-size: 30px;
}
[data-theme="dark"] .bcover { background: repeating-linear-gradient(135deg, #10202e 0 12px, #0e1b29 12px 24px); }
.bcover i { font-style: normal; font-size: 12px; font-weight: 700; color: var(--acc); text-align: center; padding: 0 8px; }
.bname { font-size: 12.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bcard .vdel { position: absolute; top: 8px; right: 8px; background: rgba(0,0,0,.1); color: #fff; border-radius: 7px; }

/* 全屏阅读弹层 */
#reader { position: fixed; inset: 0; z-index: 90; background: #14181e; display: flex; flex-direction: column; }
.reader-bar {
  display: flex; align-items: center; gap: 9px; padding: 10px 16px;
  background: #1b2027; color: #e6edf5; border-bottom: 1px solid #2a323c; flex-wrap: wrap;
}
.reader-bar b { font-size: 14px; max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reader-bar .grow { flex: 1; }
.reader-progress { height: 4px; background: #2a323c; }
.reader-progress i { display: block; height: 100%; background: var(--grad); transition: width .3s; }
#pdfScroll { flex: 1; overflow: auto; text-align: center; padding: 18px; }
#pdfCanvas { background: #fff; border-radius: 6px; box-shadow: 0 8px 40px rgba(0,0,0,.45); max-width: 100%; }
#readerPage { width: 66px; text-align: center; background: #14181e; border-color: #2a323c; color: #e6edf5; }
.reader-bar select { background: #14181e; border-color: #2a323c; color: #e6edf5; }
.rbtn {
  background: #232a33; color: #dfe7f1; border: 1px solid #313a46; border-radius: 9px;
  padding: 6px 12px; cursor: pointer; font-size: 13px;
}
.rbtn:hover { border-color: var(--acc2); color: var(--acc2); }

/* ---------------- 计划 ---------------- */
.add-task.row > input[type="text"] { flex: 2; }
.add-task.row > input[type="number"] { width: 90px; flex: 0; }
.add-task.row > select { width: 105px; flex: 0; }
.prog-row { display: flex; align-items: center; gap: 9px; margin: 9px 0; background: var(--bg2); border: 1px solid var(--line); border-radius: 11px; padding: 8px 12px; }
.prog-row b { width: 52px; }
.prog-row input[type="text"] { flex: 1; }
.prog-row .num { width: 64px; text-align: center; }

/* ---------------- 番茄 ---------------- */
.pomo { display: flex; justify-content: center; padding: 12px 0 0; }
.pomo-circle { position: relative; width: 230px; height: 230px; }
.pomo-circle svg circle.bg, .ring-bg { }
#pomoRing { fill: none; stroke-width: 9; stroke-linecap: round; transition: stroke-dashoffset 1s linear; }
.pomo-circle .ring-bg { fill: none; stroke: var(--line); stroke-width: 9; }
.pomo-txt { position: absolute; top: 72px; left: 0; right: 0; text-align: center; font-size: 44px; font-weight: 800; letter-spacing: 2px; }
.pomo-sub { position: absolute; top: 128px; left: 0; right: 0; text-align: center; color: var(--ink2); font-size: 13px; }

/* ---------------- 资讯 ---------------- */
.feed .live pre { background: var(--bg2); padding: 10px; border-radius: 10px; max-height: 300px; overflow: auto; font-size: 12px; }
.feed-item { border-top: 1px dashed var(--line); padding: 10px 0; }

/* 资讯正文美化（2026-11-06）：■ 栏目标题醒目、条目分行有间距、来源弱化 */
.feed-body .news-sec { display: block; font-weight: 700; color: #0f766e; margin: 12px 0 6px; }
.feed-body .md-li { display: block; margin: 7px 0; line-height: 1.7; }
.feed-body .md-src { color: var(--muted, #888); font-size: 12px; }
.feed-item:first-of-type { border-top: 0; }
.feed-head { display: flex; justify-content: space-between; gap: 10px; align-items: baseline; }
.feed-body { font-size: 13px; color: var(--ink); }
.feed-body .md-li { display: block; }
.err-msg { color: var(--danger); }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 800px) { .link-grid { grid-template-columns: repeat(2, 1fr); } }
.link-card {
  display: flex; flex-direction: column; gap: 2px;
  background: var(--bg2); border: 1px solid var(--line); border-radius: 11px; padding: 11px 13px;
  color: var(--ink); transition: border-color .15s, transform .12s;
}
.link-card b { color: var(--acc2); }
.link-card:hover { transform: translateY(-2px); border-color: var(--acc2); }

/* ---------------- 网盘 ---------------- */
.add-quark.row > input[type="text"] { flex: 2; }
.add-quark.row > select { width: 130px; }
.qgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.qcard { margin-bottom: 0; }
.qcard.fin { opacity: .65; }
.qhead { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.qhead b { font-size: 13.5px; }
.qurl { display: inline-block; margin: 4px 0 2px; font-size: 12.5px; }
.qprog { margin: 6px 0; }
.qprog input[type="range"] { flex: 1; accent-color: var(--acc); }

/* ---------------- AI 对话 ---------------- */
.chat-shell { display: flex; flex-direction: column; height: calc(100vh - 150px); min-height: 480px; padding: 0; overflow: hidden; }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 13px 18px; border-bottom: 1px solid var(--line); background: var(--bg2); border-radius: var(--radius) var(--radius) 0 0; }
.chat-head .muted { flex: 1; }
.chat-msgs { flex: 1; overflow-y: auto; padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 78%; padding: 10px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.6; word-break: break-word; }
.bubble.me { align-self: flex-end; background: var(--grad); color: #fff; border-bottom-right-radius: 4px; }
.bubble.ai { align-self: flex-start; background: var(--bg2); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.bubble.ai .md-li { display: block; }
.bubble.ai .done { color: var(--ok); display: block; }
.cursor { animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .15; } }
.streaming { }
.chat-input { display: flex; gap: 9px; padding: 12px 14px; border-top: 1px solid var(--line); background: var(--bg2); border-radius: 0 0 var(--radius) var(--radius); }
.chat-input textarea { flex: 1; }

/* ---------------- 弹窗 ---------------- */
.modal { position: fixed; inset: 0; z-index: 80; background: rgba(9, 14, 24, .55); display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-sheet {
  width: min(640px, 94vw); max-height: 88vh; overflow: auto;
  background: var(--card); border-radius: 18px; box-shadow: 0 30px 80px rgba(0, 0, 0, .4);
  padding: 22px 24px;
}
.modal-sheet h2 { font-size: 17px; display: flex; align-items: center; gap: 8px; }
.modal-sheet h4 { margin: 16px 0 8px; color: var(--acc2); font-size: 13.5px; }
label { display: block; margin: 8px 0; font-size: 12.5px; color: var(--ink2); }
label input, label select { display: block; width: 100%; margin-top: 4px; }
.modal-foot { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }

/* ---------------- v2：打卡 / 刷题 / AList ---------------- */
.chip.sm { padding: 4px 10px; font-size: 12px; }
.chip.ok { background: rgba(5, 150, 105, .14); color: var(--ok); border-color: rgba(5, 150, 105, .4); font-weight: 600; }
.chip.warn { background: rgba(217, 119, 6, .12); color: var(--warn); border-color: rgba(217, 119, 6, .4); font-weight: 600; }
.ck-drop {
  border: 2px dashed var(--acc2); background: rgba(6, 182, 212, .05);
  border-radius: 14px; padding: 26px 14px; text-align: center; cursor: pointer;
  margin: 10px 0; transition: background .15s, border-color .15s; color: var(--ink2);
}
.ck-drop:hover, .ck-drop.drag { background: rgba(6, 182, 212, .12); border-color: var(--acc); color: var(--acc); }
.ck-drop b { color: var(--acc); }
.ck-img { max-width: 100%; max-height: 300px; border-radius: 10px; border: 1px solid var(--line); display: block; }
.ck-hist { border-radius: 12px; padding: 10px 13px; margin: 10px 0; font-size: 13px; }
.ck-hist.ok { background: rgba(5, 150, 105, .1); border: 1px solid rgba(5, 150, 105, .35); }
.ck-hist.warn { background: rgba(217, 119, 6, .09); border: 1px solid rgba(217, 119, 6, .35); }
.qz-q { background: var(--bg2); border: 1px solid var(--line); border-radius: 13px; padding: 13px 15px; margin: 10px 0; }
.qz-q > b { color: var(--acc2); }
.qz-stem { margin: 7px 0 9px; line-height: 1.6; }
.qz-opt { display: flex; gap: 8px; align-items: flex-start; padding: 7px 10px; border-radius: 9px; cursor: pointer; }
.qz-opt:hover { background: rgba(6, 182, 212, .08); }
.qz-opt input { margin-top: 3px; accent-color: var(--acc); }
.qz-input { width: 100%; }
.qz-res { margin-top: 8px; font-size: 13px; min-height: 18px; }
.qz-res .err { color: var(--danger); }
.qz-res .warn { color: var(--warn); }
.qz-res .ok { color: var(--ok); }
.alist-list { display: flex; flex-direction: column; gap: 4px; max-height: 420px; overflow: auto; }
.alist-row {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg2); border: 1px solid var(--line); border-radius: 9px;
  padding: 7px 11px; font-size: 13px;
}
.alist-row:hover { border-color: var(--acc2); }
.alist-row > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.spin {
  width: 28px; height: 28px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--acc2);
  animation: turn .8s linear infinite; margin: 12px auto;
}
@keyframes turn { to { transform: rotate(360deg); } }
.modal-sheet.wide { width: min(760px, 96vw); }

/* ---------------- Toast ---------------- */#toasts { position: fixed; right: 20px; bottom: 20px; z-index: 120; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: #16233b; color: #fff; padding: 10px 16px; border-radius: 11px;
  font-size: 13px; box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
  animation: slidein .25s ease; max-width: 340px;
}
.toast.ok { border-left: 3px solid var(--ok); }
.toast.err { border-left: 3px solid var(--danger); }
.toast.warn { border-left: 3px solid var(--warn); }
.toast.out { opacity: 0; transform: translateY(8px); transition: all .3s; }
@keyframes slidein { from { opacity: 0; transform: translateX(30px); } }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
  #app { flex-direction: column; }
  #sidebar { position: static; width: 100%; flex: none; height: auto; padding: 10px; }
  .nav { flex-direction: row; overflow-x: auto; flex: none; }
  .nav-item { padding: 8px 12px; white-space: nowrap; }
  .nav-item.active::before { display: none; }
  .brand { padding: 6px 4px 10px; }
  .sidebar-foot { display: none; }
  #content { padding: 14px; }
  .hero-days { font-size: 46px; }
  .timeline { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   v3 · 登录注册 / 多用户 / 手机适配
   ============================================================ */

/* ---------- 登录注册 ---------- */
.auth-screen {
  position: fixed; inset: 0; z-index: 200; overflow: auto;
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(6,182,212,.22), transparent 60%),
    radial-gradient(800px 500px at 85% 90%, rgba(16,185,129,.18), transparent 60%),
    linear-gradient(135deg, #081626 0%, #0d2136 55%, #0a2f37 100%);
  color: #e8f2fb;
  display: flex; align-items: center; justify-content: center;
  padding: 28px 18px;
}
.auth-wrap { display: grid; grid-template-columns: minmax(360px, 460px) minmax(320px, 520px); gap: 54px; align-items: center; max-width: 1080px; width: 100%; }
.auth-card {
  background: rgba(255,255,255,.97); color: #16233b; border-radius: 24px;
  padding: 26px 28px 20px; box-shadow: 0 40px 100px -30px rgba(0,0,0,.65);
  border: 1px solid rgba(255,255,255,.5);
}
.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.auth-brand .brand-mark { width: 46px; height: 46px; font-size: 24px; }
.auth-brand b { font-size: 21px; letter-spacing: .5px; color: #0d1b2e; }
.auth-brand span { display: block; font-size: 10px; color: #6b7f95; letter-spacing: 1.2px; }
.auth-tabs { display: flex; gap: 6px; background: #eef3f8; padding: 5px; border-radius: 12px; margin-bottom: 16px; }
.auth-tab {
  flex: 1; border: 0; background: transparent; padding: 9px 10px; border-radius: 9px;
  cursor: pointer; font-weight: 600; font-size: 13.5px; color: #64748b;
}
.auth-tab.on { background: #fff; color: #0e7490; box-shadow: 0 2px 10px rgba(15,23,42,.1); }
.auth-form label { font-size: 12.5px; color: #5b6b83; margin: 10px 0; }
.auth-form input {
  width: 100%; margin-top: 5px; background: #f4f7fb; border: 1px solid #e1e8f1;
  border-radius: 10px; padding: 10px 12px; font-size: 14px;
}
.auth-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.auth-submit { width: 100%; padding: 12px; font-size: 14.5px; border-radius: 12px; margin-top: 8px; }
.auth-err { color: #dc2626; font-size: 12.5px; min-height: 18px; margin: 6px 0 0; }
.auth-tip { text-align: center; margin: 10px 0 0; }
.auth-foot { margin-top: 16px; padding-top: 14px; border-top: 1px dashed #e4eaf2; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.apk-link { font-size: 13px; font-weight: 600; color: #0e7490; }
.auth-side h2 { font-size: 34px; line-height: 1.3; margin-bottom: 26px; color: #fff; letter-spacing: .5px; }
.auth-side ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 15px; }
.auth-side li { display: flex; flex-direction: column; gap: 2px; padding: 11px 14px; border-radius: 13px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1); }
.auth-side li b { font-size: 14.5px; color: #a7f3d0; }
.auth-side li span { font-size: 12.5px; color: #b7d9e8; }

/* ---------- 顶栏用户 / 同步 ---------- */
.sync-dot {
  font-size: 11px; padding: 4px 9px; border-radius: 999px; white-space: nowrap;
  border: 1px solid var(--line); background: var(--card); color: var(--ink2);
}
.sync-dot.ok { color: var(--ok); }
.sync-dot.warn { color: var(--warn); }
.user-wrap { position: relative; }
.user-chip {
  display: flex; align-items: center; gap: 7px; border: 1px solid var(--line);
  background: var(--card); border-radius: 999px; padding: 4px 10px 4px 4px; cursor: pointer;
  color: var(--ink); max-width: 170px;
}
.user-chip:hover { border-color: var(--acc2); }
.user-avatar {
  width: 27px; height: 27px; border-radius: 50%; background: var(--grad); color: #fff;
  display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px;
}
.user-name { font-size: 12.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 88px; }
.user-caret { font-size: 10px; color: var(--ink2); }
.user-menu {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 70; width: 220px;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: 0 20px 50px -15px rgba(2,6,23,.35); padding: 7px; overflow: hidden;
}
.user-menu-head { padding: 10px 12px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 2px; margin-bottom: 5px; }
.user-menu button, .user-menu a {
  display: block; width: 100%; text-align: left; border: 0; background: transparent;
  padding: 9px 12px; border-radius: 9px; font-size: 13px; cursor: pointer; color: var(--ink);
}
.user-menu button:hover, .user-menu a:hover { background: var(--bg2); }
.user-menu .danger { color: var(--danger); }
.sidebar-links { display: flex; gap: 10px; margin-top: 9px; flex-wrap: wrap; }
.sidebar-links a { color: #9db8d2; font-size: 11.5px; }
.sidebar-links a:hover { color: #fff; }

/* ---------- 账号设置 ---------- */
.account-box { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.account-line { display: flex; align-items: center; gap: 10px; font-size: 13.5px; }
.account-line > span:first-child { color: var(--ink2); }
.role-badge { font-size: 10.5px; padding: 2px 8px; border-radius: 999px; background: var(--bg2); border: 1px solid var(--line); color: var(--ink2); }
.role-badge.admin { background: rgba(6,182,212,.12); border-color: rgba(6,182,212,.4); color: var(--acc); font-weight: 600; }
.pwd-box { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); }
.chip { text-decoration: none; display: inline-flex; align-items: center; gap: 4px; }
.inline-check { display: inline-flex; align-items: center; gap: 6px; margin: 0; color: var(--ink); font-size: 13px; }
.inline-check input { width: 16px; height: 16px; accent-color: var(--acc); }

/* ---------- 强制学习 ---------- */
.forced-card { border-color: rgba(239,68,68,.25); }
.forced-status { margin: 8px 0; }
.forced-active { background: rgba(239,68,68,.08); border: 1px solid rgba(239,68,68,.3); border-radius: 12px; padding: 12px 15px; }
.forced-active b { color: #dc2626; font-size: 15px; }
.upload-toast { max-width: 420px; }

/* ---------- 管理员 ---------- */
.admin-head { background: linear-gradient(135deg, rgba(6,182,212,.08), rgba(16,185,129,.06)); }
.admin-summary { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 12px; margin-bottom: 16px; }
.admin-stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 13px 16px; box-shadow: var(--shadow); }
.admin-stat b { display: block; font-size: 22px; color: var(--acc); line-height: 1.25; }
.admin-stat span { font-size: 11.5px; color: var(--ink2); }
.admin-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.admin-table { width: 100%; border-collapse: collapse; min-width: 900px; font-size: 12.5px; }
.admin-table th { text-align: left; background: var(--bg2); padding: 10px 12px; color: var(--ink2); font-weight: 600; white-space: nowrap; border-bottom: 1px solid var(--line); }
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.admin-table tbody tr:hover { background: rgba(6,182,212,.04); }
.admin-table tr.disabled-row { opacity: .55; }
.admin-actions { white-space: nowrap; }
.admin-actions .chip { margin: 2px 3px 2px 0; }
.chip.danger { color: var(--danger); border-color: rgba(239,68,68,.35); }
.chip.danger:hover { background: rgba(239,68,68,.08); }
.admin-detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin: 10px 0 4px; }
.admin-detail-grid > div { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; display: flex; flex-direction: column; gap: 2px; font-size: 13px; }
.admin-detail-grid span { font-size: 11px; }
.admin-mini-bars { display: flex; align-items: flex-end; gap: 5px; height: 100px; padding: 8px 4px; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; overflow-x: auto; }
.admin-mini-bars > div { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; flex: 1 0 38px; height: 100%; gap: 2px; }
.admin-mini-bars i { display: block; width: 14px; border-radius: 4px 4px 0 0; background: var(--grad); min-height: 4px; }
.admin-mini-bars span { font-size: 9px; color: var(--ink2); }
.admin-mini-bars b { font-size: 9px; color: var(--acc); }
.admin-journal p { font-size: 12.5px; background: var(--bg2); border: 1px solid var(--line); border-radius: 9px; padding: 8px 11px; }
.admin-raw { margin: 12px 0 4px; }
.admin-raw summary { cursor: pointer; color: var(--acc2); font-size: 12.5px; }
.admin-raw pre { max-height: 300px; overflow: auto; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 10px; font-size: 11px; }

/* ---------- 移动端 ---------- */
@media (max-width: 760px) {
  #app { display: block; padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  #sidebar {
    position: fixed; left: 0; right: 0; bottom: 0; top: auto;
    width: 100%; flex: none; height: auto; padding: 5px 6px calc(5px + env(safe-area-inset-bottom));
    z-index: 60; border-radius: 16px 16px 0 0;
    box-shadow: 0 -10px 30px -12px rgba(2,6,23,.5);
  }
  .brand, .sidebar-foot { display: none !important; }
  .nav { flex-direction: row; overflow-x: auto; gap: 2px; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .nav-item {
    flex: 1 1 0; min-width: 0; flex-direction: column; gap: 2px;
    padding: 6px 2px; font-size: 8.8px; justify-content: center; border-radius: 10px;
    text-align: center;
  }
  .nav-item svg { width: 20px; height: 20px; flex: 0 0 20px; }
  .nav-item.active::before { display: none; }
  .nav-badge { position: absolute; top: 2px; right: 6px; margin: 0; }
  #main { padding-bottom: 0; }
  #topbar {
    padding: 8px 10px; gap: 6px; flex-wrap: wrap;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
  }
  #viewTitle { font-size: 15px; }
  #cdChip { font-size: 10px; padding: 4px 8px; margin-left: auto; order: 3; }
  .icon-btn { width: 32px; height: 32px; font-size: 14px; }
  .sync-dot { padding: 4px 6px; order: 4; }
  .sync-dot .sync-txt { display: none; }
  .user-chip { padding: 3px 7px 3px 3px; max-width: 118px; }
  .user-avatar { width: 25px; height: 25px; }
  .user-name { max-width: 58px; }
  #content { padding: 12px 11px 28px; }
  .card { padding: 14px 14px; border-radius: 14px; margin-bottom: 12px; }
  .hero { flex-direction: column; padding: 18px 16px; }
  .hero h1 { font-size: 20px; }
  .hero-days { font-size: 44px; }
  .hero-side { flex-direction: row; min-width: 0; }
  .stat-mini { flex: 1; padding: 8px 6px; }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .rings { gap: 2px; }
  .ring-item { width: 88px; }
  .ring-item svg { width: 70px; height: 70px; }
  .ring-num { top: 26px; font-size: 14px; }
  .quick-tiles { grid-template-columns: repeat(2, 1fr); gap: 9px; }
  .tile { padding: 14px 6px; font-size: 13px; }
  .toolbar { gap: 7px; }
  .btn { padding: 8px 13px; font-size: 12.5px; }
  .task-row { flex-wrap: wrap; gap: 7px; padding: 8px 10px; }
  .task-row .task-text { flex-basis: calc(100% - 40px); }
  .task-row select, .mins-in { font-size: 12px; }
  .prog-row { flex-wrap: wrap; }
  .prog-row input[type="text"] { flex-basis: 100%; }
  .add-task.row { flex-wrap: wrap; }
  .add-task.row > input[type="text"] { flex-basis: 100%; }
  .add-quark.row { flex-wrap: wrap; }
  .player-ctl { gap: 5px; }
  .vgrid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .bgrid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .qgrid { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: 1fr 1fr; }
  .pomo-circle { transform: scale(.92); }
  .chat-shell { height: calc(100vh - 210px); min-height: 380px; }
  .bubble { max-width: 90%; }
  .modal { padding: 10px; align-items: flex-end; }
  .modal-sheet { width: 100%; max-height: 92vh; border-radius: 18px 18px 0 0; padding: 18px 16px calc(18px + env(safe-area-inset-bottom)); }
  .modal-foot { flex-wrap: wrap; }
  .reader-bar { gap: 5px; padding: 7px 8px; }
  .reader-bar b { max-width: 26vw; }
  #pdfScroll { padding: 8px; }
  .auth-screen { padding: 14px 12px; align-items: flex-start; }
  .auth-wrap { display: block; max-width: 460px; margin: auto; }
  .auth-side { display: none; }
  .auth-card { padding: 20px 17px 16px; border-radius: 20px; }
  .auth-grid2 { grid-template-columns: 1fr; gap: 0; }
  .admin-summary { grid-template-columns: repeat(2, 1fr); gap: 9px; }
  .admin-detail-grid { grid-template-columns: 1fr; }
  .admin-table { min-width: 820px; }
  .toast { max-width: 88vw; }
  #toasts { right: 10px; bottom: calc(78px + env(safe-area-inset-bottom)); left: 10px; }
  .user-menu { right: 0; width: 210px; }
  body { font-size: 14px; }
  input, select, textarea { font-size: 16px !important; } /* 防 iOS 自动放大 */
}

/* 小屏（平板竖屏） */
@media (min-width: 761px) and (max-width: 980px) {
  .admin-summary { grid-template-columns: repeat(3, 1fr); }
  .sidebar-foot { display: none; }
  #app { padding-bottom: 62px; }
  #sidebar { position: fixed; bottom: 0; top: auto; left: 0; right: 0; width: 100%; height: auto; }
  .nav { flex-direction: row; overflow-x: auto; }
  .nav-item { flex-direction: column; font-size: 10.5px; }
  .nav-item.active::before { display: none; }
  .brand { display: none; }
}

/* 深色模式细节 */
[data-theme="dark"] .auth-card { background: rgba(17,28,48,.98); color: #e5eefb; }
[data-theme="dark"] .auth-brand b { color: #e5eefb; }
[data-theme="dark"] .auth-tabs { background: #0b1220; }
[data-theme="dark"] .auth-tab.on { background: #16233b; color: #67e8f9; }
[data-theme="dark"] .auth-form input { background: #0f172a; border-color: #1e2b45; color: #e5eefb; }
[data-theme="dark"] .account-box { background: #0f172a; }