:root {
  --bg: #0b0b13;
  --surface: #15151f;
  --surface-2: #1b1b29;
  --line: #262637;
  --line-strong: #34344a;
  --accent: #7c5cff;
  --accent-2: #a78bfa;
  --accent-glow: rgba(124, 92, 255, 0.35);
  --ink: #eef0f6;
  --sub: #9191a8;
  --ok: #34d399;
  --warn: #f59e0b;
  --bad: #f87171;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 500px at 50% -200px, rgba(124, 92, 255, 0.12), transparent 60%),
    var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ===== 顶栏 ===== */
.nav {
  height: 58px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 11, 19, 0.8);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 10;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; letter-spacing: 0.3px;
}
.logo-dot {
  width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 14px var(--accent-glow);
}
.nav-right { display: flex; gap: 8px; }
.pill {
  font-size: 12px; padding: 6px 14px; border-radius: 999px; font-weight: 600;
  border: 1px solid var(--line-strong); color: var(--sub); background: var(--surface);
}
.pill.warn { color: #fcd34d; border-color: rgba(245, 158, 11, 0.35); background: rgba(245, 158, 11, 0.08); }
.pill.ok { color: var(--ok); border-color: rgba(52, 211, 153, 0.35); background: rgba(52, 211, 153, 0.08); }

/* ===== 页头 ===== */
.hero { text-align: center; padding: 44px 20px 8px; }
.hero h1 {
  margin: 0; font-size: 30px; font-weight: 800; letter-spacing: 0.5px;
  background: linear-gradient(120deg, #ffffff 40%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { margin: 12px 0 0; color: var(--sub); font-size: 14px; }

/* ===== 步骤条 ===== */
.steps {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 6px; margin: 26px auto 6px; padding: 12px 18px;
  width: fit-content; max-width: 92vw;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
}
.step {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--sub); padding: 4px 10px;
}
.step i {
  font-style: normal; width: 20px; height: 20px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  background: var(--surface-2); color: var(--sub); border: 1px solid var(--line-strong);
}
.step-arrow {
  width: 14px; height: 1px;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}

/* ===== 布局 ===== */
.app {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 18px;
  padding: 22px 28px 48px;
  max-width: 1240px;
  margin: 0 auto;
  align-items: start;
}
.col-form { display: flex; flex-direction: column; gap: 18px; }
.col-preview { position: sticky; top: 76px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.card h3 {
  margin: 0; font-size: 16px; font-weight: 700; color: var(--ink);
  display: flex; align-items: center; gap: 9px;
}
.card h3::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  flex: none;
}
.card-sub { margin: 8px 0 0; font-size: 12.5px; color: var(--sub); }

/* ===== 表单 ===== */
label { display: block; font-size: 12.5px; color: var(--sub); margin: 14px 0 6px; }
label.check {
  display: flex; align-items: center; gap: 8px; color: var(--ink);
  font-size: 13px; margin-top: 12px; cursor: pointer;
}
input, select {
  width: 100%; padding: 11px 13px;
  border: 1px solid var(--line-strong); border-radius: 10px;
  font-size: 13.5px; background: var(--surface-2); color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input::placeholder { color: #5b5b72; }
input:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
select[size] { padding: 6px; }
select[size] option {
  padding: 9px 10px; border-radius: 8px; margin: 3px;
  background: var(--surface-2);
}
select[size] option:checked { background: rgba(124, 92, 255, 0.25); }
.row { display: flex; gap: 8px; margin: 0 0 10px; }
.row input { flex: 1; }
.row + select[size] { margin-top: 2px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
input[type="checkbox"] {
  width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer;
}

/* ===== 按钮 ===== */
button {
  width: 100%; padding: 11px 12px;
  border: 1px solid var(--line-strong); border-radius: 10px;
  font-size: 13px; font-weight: 600; font-family: inherit;
  background: var(--surface-2); color: var(--ink);
  cursor: pointer; transition: 0.15s;
}
button:hover { border-color: var(--accent); color: var(--accent-2); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary, button.btn-primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff; border: none;
  box-shadow: 0 4px 18px var(--accent-glow);
}
button.primary:hover, button.btn-primary:hover {
  color: #fff; filter: brightness(1.1);
  box-shadow: 0 6px 24px var(--accent-glow);
}
button.btn-outline { background: transparent; }
button.btn-sub { width: auto; flex: none; margin: 0; }
button.big {
  padding: 14px; font-size: 15px; margin-top: 18px; border-radius: 12px;
}
.row button { margin: 0; }
.row button.btn-primary { flex: 1; }
.row button.btn-outline { flex: 1; }
#btnBind, #btnPublish { margin-top: 2px; }
.hint { font-size: 12px; color: #6b6b82; margin: 10px 0 0; line-height: 1.6; }

/* ===== 预览 ===== */
.preview-card { min-height: 60vh; }
.preview-head {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px;
}
.preview-head h3 { margin: 0; }
.tag {
  font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 999px;
  background: var(--surface-2); color: var(--sub); border: 1px solid var(--line-strong);
}
.tag.llm { color: var(--ok); border-color: rgba(52, 211, 153, 0.35); background: rgba(52, 211, 153, 0.08); }
.tag.tpl { color: #fcd34d; border-color: rgba(245, 158, 11, 0.35); background: rgba(245, 158, 11, 0.08); }
.sub-label { font-size: 13px; font-weight: 600; color: var(--ink); margin: 20px 0 10px; }
.sub-label em { font-style: normal; font-weight: 400; font-size: 12px; color: var(--sub); margin-left: 8px; }
.empty { color: #5b5b72; font-size: 13px; margin: 4px 0; }

.titles { display: flex; flex-direction: column; gap: 8px; }
.titles .t {
  border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 13px; font-size: 13.5px; line-height: 1.55;
  cursor: pointer; transition: 0.15s; background: var(--surface-2); color: var(--ink);
}
.titles .t:hover { border-color: var(--accent); }
.titles .t.active {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.12);
  box-shadow: 0 0 12px rgba(124, 92, 255, 0.15);
}

/* 微信阅读器白纸面板 */
.article.paper {
  background: #ffffff; color: #2b2f36;
  border: none; border-radius: 12px; padding: 22px;
  margin-top: 16px; font-size: 15px; line-height: 1.85;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}
.article h2 { font-size: 17px; margin: 18px 0 8px; color: #1a1d24; }
.article p { margin: 9px 0; }

.mcq {
  margin-top: 14px; font-size: 13.5px;
  background: rgba(124, 92, 255, 0.08);
  border: 1px solid rgba(124, 92, 255, 0.3);
  border-radius: 12px; padding: 13px 15px; color: var(--ink);
}
.mcq ul { margin: 8px 0 0; padding-left: 20px; color: var(--accent-2); }
.compliance { margin-top: 12px; font-size: 12.5px; padding: 9px 13px; border-radius: 10px; }
.compliance.ok {
  background: rgba(52, 211, 153, 0.08); color: var(--ok);
  border: 1px solid rgba(52, 211, 153, 0.3);
}
.compliance.bad {
  background: rgba(248, 113, 113, 0.08); color: var(--bad);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

/* ===== 历史 ===== */
.history { display: flex; flex-direction: column; gap: 8px; max-height: 220px; overflow: auto; }
.history .h {
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px;
  cursor: pointer; transition: 0.15s; background: var(--surface-2);
}
.history .h:hover { border-color: var(--accent); }
.history .h .t { font-size: 13px; font-weight: 600; color: var(--ink); }
.history .h .m { font-size: 11px; color: var(--sub); margin-top: 3px; }

/* ===== 日志 ===== */
.log {
  margin: 0; background: #0d0d15; color: #7ee2a8;
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
  font-size: 12px; max-height: 200px; overflow: auto;
  white-space: pre-wrap; line-height: 1.6; font-family: Consolas, monospace;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ===== 通用 ===== */
.hidden { display: none !important; }
.btn-mini {
  width: auto; margin: 0; padding: 6px 14px; font-size: 12px;
  border-radius: 999px; background: transparent;
}
.mode-switch {
  display: flex; flex-direction: column; gap: 4px;
  margin-top: 14px; padding: 12px 14px;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px;
}
.mode-switch .check { margin-top: 0; }

/* ===== 登录/注册 ===== */
.auth-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  background:
    radial-gradient(900px 420px at 50% -120px, rgba(124, 92, 255, 0.18), transparent 60%),
    var(--bg);
}
.auth-card {
  width: 100%; max-width: 400px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
  padding: 34px 30px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(124, 92, 255, 0.08);
}
.auth-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 19px; font-weight: 800; justify-content: center;
}
.auth-sub { text-align: center; font-size: 12.5px; color: var(--sub); margin: 10px 0 0; line-height: 1.6; }
.tabs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 4px; margin-top: 20px;
}
.tab {
  width: 100%; margin: 0; padding: 8px; font-size: 13px;
  border: none; border-radius: 8px; background: transparent; color: var(--sub);
}
.tab.active {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff; box-shadow: 0 2px 10px var(--accent-glow);
}
.auth-msg { min-height: 18px; font-size: 12.5px; color: var(--bad); margin: 10px 0 0; text-align: center; }

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .col-preview { position: static; }
  .hero h1 { font-size: 24px; }
}

/* ---------- v3 新增：平台选择 / 选题 / 标签 / AI味报告 ---------- */
.seg {
  display: flex; gap: 6px; background: rgba(124, 92, 255, .08);
  border: 1px solid rgba(124, 92, 255, .25); border-radius: 10px; padding: 4px;
}
.seg button {
  flex: 1; background: transparent; border: 0; color: var(--sub);
  padding: 8px 0; border-radius: 7px; cursor: pointer; font-size: 13px;
  transition: all .15s ease;
}
.seg button.active {
  background: linear-gradient(135deg, #7c5cff, #6242e8);
  color: #fff; font-weight: 600;
  box-shadow: 0 2px 10px rgba(124, 92, 255, .35);
}
.divider { height: 1px; background: var(--line); margin: 16px 0 12px; }
.topics { margin-top: 8px; display: flex; flex-direction: column; gap: 6px; max-height: 260px; overflow-y: auto; }
.topic-item {
  background: rgba(124, 92, 255, .06); border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 12px; cursor: pointer; transition: all .15s ease;
}
.topic-item:hover { border-color: var(--accent); background: rgba(124, 92, 255, .12); }
.topic-item .tt { font-size: 13px; color: var(--ink); font-weight: 600; line-height: 1.45; }
.topic-item .ta { font-size: 11px; color: var(--sub); margin-top: 3px; }
.xhs-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.xhs-tags .xtag {
  font-size: 12px; color: #ff5c8a; background: rgba(255, 92, 138, .1);
  border: 1px solid rgba(255, 92, 138, .3); border-radius: 999px; padding: 3px 10px;
}
.deai-report {
  margin-top: 12px; border-radius: 10px; padding: 10px 14px; font-size: 13px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .03); line-height: 1.6;
}
.deai-report.ok { border-color: rgba(52, 211, 153, .4); background: rgba(52, 211, 153, .07); color: #34d399; }
.deai-report.warn { border-color: rgba(245, 158, 11, .4); background: rgba(245, 158, 11, .06); color: #f59e0b; }
.deai-report ul { margin: 6px 0 0; padding-left: 18px; color: var(--sub); font-size: 12px; }
.deai-report .fine { color: var(--sub); font-size: 12px; margin-top: 4px; }

/* ---------- v4 模板版：爆文榜选中态 ---------- */
.topic-item.active {
  border-color: var(--accent);
  background: rgba(124, 92, 255, .16);
  box-shadow: 0 0 0 1px var(--accent) inset;
}