/* =========================================================
   WebAgent Platform :: 全宽响应式基础样式
   所有颜色/圆角/字体都走 CSS 变量，主题模板只需覆盖变量即可换肤
   （默认值 = 内置 default 主题；主题由 app/Themes/ThemeManager 注入 <style>）
   ========================================================= */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef2ff;
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #f9fafb;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --hover: #fafbff;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --header-bg: rgba(255, 255, 255, .92);
  --sidebar-bg: #111827;
  --bubble-user: #eef2ff;

  --ok: #10b981;
  --warn: #f59e0b;
  --err: #ef4444;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 12px rgba(16, 24, 40, .05);
  --sidebar: 240px;
  --header: 60px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
h1, h2, h3, h4 { margin: 0 0 12px; line-height: 1.35; }
p { margin: 0 0 12px; }
code { background: var(--surface-2); border: 1px solid var(--line); padding: 2px 6px; border-radius: 6px; font-size: 13px; color: var(--text); }
pre { background: #0f172a; color: #e2e8f0; padding: 14px 16px; border-radius: 10px; overflow: auto; font-size: 13px; }
hr { border: 0; border-top: 1px solid var(--line); }

/* ---------- 布局 ---------- */
.container { width: 100%; padding: 0 20px; }
.container-fluid { width: 100%; padding: 0 16px; }
.row { display: flex; flex-wrap: wrap; gap: 16px; }
.col { flex: 1 1 0; min-width: 0; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--header);
  background: var(--header-bg);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center;
  padding: 0 20px;
  gap: 16px;
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), #22d3ee); }
.nav { display: flex; align-items: center; gap: 4px; flex: 1; overflow-x: auto; }
.nav a { padding: 8px 12px; border-radius: 8px; color: var(--muted); font-size: 14px; white-space: nowrap; }
.nav a:hover, .nav a.active { background: var(--primary-soft); color: var(--primary-dark); text-decoration: none; }
.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; cursor: pointer; color: var(--text); }

/* ---------- 按钮/表单 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: calc(var(--radius) - 2px); border: 1px solid transparent;
  background: var(--primary); color: #fff; font-size: 14px; cursor: pointer;
  transition: .15s; text-decoration: none !important; font-family: inherit;
}
.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-ghost { background: var(--surface); border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-danger { background: var(--err); }
.btn-ok { background: var(--ok); }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; }

input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: calc(var(--radius) - 4px);
  font-size: 14px; background: var(--surface); color: var(--text); font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
textarea { min-height: 90px; resize: vertical; }
label { display: block; margin: 0 0 6px; font-size: 13px; font-weight: 600; color: var(--text); }
.field { margin-bottom: 14px; }
.help { font-size: 12px; color: var(--muted); margin-top: 4px; }
.checkbox { display: flex; align-items: center; gap: 8px; margin: 6px 0; }
.checkbox input { width: auto; }

/* ---------- 卡片 ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-head { padding: 16px 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.card-body { padding: 20px; }
.card-foot { padding: 14px 20px; border-top: 1px solid var(--line); background: var(--surface-2); border-radius: 0 0 var(--radius) var(--radius); }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.table th, table.table td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
table.table th { background: var(--surface-2); color: var(--text); font-weight: 600; }
table.table tr:hover td { background: var(--hover); }
table.table td.wrap { white-space: normal; min-width: 220px; }

/* ---------- 徽章/提示 ---------- */
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--line); }
.badge-ok { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.badge-warn { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.badge-err { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.badge-info { background: var(--primary-soft); color: var(--primary-dark); border-color: var(--line); }
.alert { padding: 12px 16px; border-radius: 10px; margin: 12px 0; font-size: 14px; border: 1px solid transparent; }
.alert-error { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-info { background: var(--primary-soft); color: var(--primary-dark); border-color: var(--line); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ---------- 首页 ---------- */
.hero { padding: 64px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(28px, 5vw, 46px); font-weight: 800; letter-spacing: -.5px; }
.hero p { color: var(--muted); max-width: 860px; margin: 0 auto 24px; font-size: 17px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.stat .num { font-size: 26px; font-weight: 700; }
.stat .label { color: var(--muted); font-size: 13px; }

/* ---------- 套餐卡片 ---------- */
.pkg { background: var(--surface); border: 1px solid var(--line); border-radius: calc(var(--radius) + 2px); padding: 22px; display: flex; flex-direction: column; gap: 10px; transition: .18s; text-align: left; }
.pkg:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(79, 70, 229, .12); border-color: var(--primary); }
.pkg.hot { border-color: var(--primary); box-shadow: 0 8px 20px rgba(79, 70, 229, .14); }
.pkg .price { font-size: 30px; font-weight: 800; }
.pkg .price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.pkg ul { margin: 8px 0 0; padding-left: 18px; font-size: 14px; color: var(--text); }
.pkg ul li { margin: 4px 0; }
.pkg .btn-block { margin-top: auto; }

/* ---------- 区块标题 ---------- */
/* 全宽布局下内容区不必过窄：1240 在 2K 屏也留白合理，小屏自动退化为 100% */
.section { width: 100%; max-width: min(1240px, 100%); margin: 0 auto 36px; }
.page-wrap { width: 100%; max-width: min(1240px, 100%); margin: 0 auto; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.section-head h2 { margin: 0; font-size: clamp(20px, 2.6vw, 26px); font-weight: 800; letter-spacing: -.2px; }
.section-head .sub { color: var(--muted); font-size: 14px; margin: 4px 0 0; }

/* ---------- 功能亮点 ---------- */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.features > * { min-width: 0; }
/* 8 张卡固定 4 列 → 4×2；中等屏 2 列 → 4×2；手机 1 列。始终整行，不留孤卡 */
@media (max-width: 1080px) { .features:not(.features-3) { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .features:not(.features-3) { grid-template-columns: 1fr; } }
/* 6 张亮点卡用 3 列，保证是 3×2 的齐整网格 */
.features-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 860px) { .features-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .features-3 { grid-template-columns: 1fr; } }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; transition: .18s; }
.feature:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: 0 10px 24px rgba(79, 70, 229, .10); }
.feature .ico { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
                font-size: 20px; background: var(--primary-soft); color: var(--primary); margin-bottom: 10px; }
.feature h3 { font-size: 15px; margin: 0 0 6px; font-weight: 700; }
.feature p { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.65; }
.feature .tags { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--surface-2);
       border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }

/* ---------- 首页三档套餐（铺满、中间推荐位） ---------- */
.pkg-trio {
  display: grid;
  /* auto-fit：3 张卡就平分整行并铺满；屏宽不够时自动降列，绝不横向截断 */
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  align-items: stretch;
  padding-top: 10px;      /* 给推荐位的上浮/角标留空间 */
}
.pkg-trio .pkg { position: relative; padding: 24px 22px; }
.pkg-trio .pkg.is-best {
  border-color: var(--primary);
  background: linear-gradient(180deg, var(--primary-soft) 0%, var(--surface) 48%);
  box-shadow: 0 18px 40px rgba(79, 70, 229, .18);
}
.pkg-trio .pkg.is-best::before {
  content: '推荐'; position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff; font-size: 12px; font-weight: 600;
  letter-spacing: .04em; padding: 3px 12px; border-radius: 999px;
  box-shadow: 0 4px 10px rgba(79, 70, 229, .3); white-space: nowrap;
}
.pkg-trio .pkg.is-best .price { color: var(--primary); }
@media (min-width: 861px) {
  /* 桌面端把推荐档轻轻抬起，视觉上「突出中间」 */
  .pkg-trio .pkg.is-best,
  .pkg-trio .pkg.is-best:hover { transform: translateY(-8px); }
}
@media (max-width: 860px) {
  /* 放不下 3 列时改为单列堆叠：宁可变长，也不横向截断 */
  .pkg-trio { grid-template-columns: 1fr; gap: 14px; }
  .pkg-trio .pkg.is-best { transform: none; }
}

/* ---------- 配额进度条 ---------- */
/* 首页配额概览：窄屏自动折行成 2×2，避免挤成一团 */
.quota-row > .col { flex: 1 1 132px; }
.quota-row { row-gap: 12px; }
.quota-line { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.quota-bar { flex: 1 1 auto; height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; min-width: 60px; }
.quota-bar > i { display: block; height: 100%; border-radius: 999px; background: var(--primary); transition: width .3s; }
.quota-bar.warn > i { background: var(--warn); }
.quota-bar.over > i { background: var(--err); }
.upgrade-hint {
  margin-top: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 13.5px; padding: 10px 14px; border-radius: 10px;
  background: rgba(245, 158, 11, .10); border: 1px solid rgba(245, 158, 11, .35); color: var(--text);
}
.upgrade-hint.over { background: rgba(239, 68, 68, .09); border-color: rgba(239, 68, 68, .35); }
.upgrade-hint strong { font-weight: 700; }
.theme-dark .upgrade-hint { background: rgba(245, 158, 11, .14); }
.theme-dark .upgrade-hint.over { background: rgba(239, 68, 68, .16); }

/* 对话内「额度用尽」卡片 */
.quota-card {
  margin-top: 10px; padding: 12px 14px; border-radius: 10px; font-size: 13.5px;
  background: rgba(239, 68, 68, .07); border: 1px solid rgba(239, 68, 68, .3);
  display: flex; flex-direction: column; gap: 8px;
}
.quota-card .t { font-weight: 700; color: var(--err); }
.quota-card .a { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.theme-dark .quota-card { background: rgba(239, 68, 68, .14); }

/* ---------- 横向滑动选择（通用轮播：计费页/主题模板可复用） ---------- */
.carousel { position: relative; }
.carousel-track {
  display: flex; gap: 16px; overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory; padding: 4px 2px 12px; -webkit-overflow-scrolling: touch;
  scrollbar-width: thin; scrollbar-color: var(--line) transparent;
}
.carousel-track::-webkit-scrollbar { height: 8px; }
.carousel-track::-webkit-scrollbar-track { background: transparent; }
.carousel-track::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; }
.carousel-track::-webkit-scrollbar-thumb:hover { background: var(--primary); }
.carousel [data-carousel-item] { flex: 0 0 300px; max-width: 88%; scroll-snap-align: start; }
.carousel [data-carousel-item] > .pkg { height: 100%; }
.carousel-nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); cursor: pointer;
  display: grid; place-items: center; box-shadow: var(--shadow); font-size: 20px; line-height: 1; padding: 0;
}
.carousel-nav:hover { border-color: var(--primary); color: var(--primary); }
.carousel-nav:disabled { opacity: .32; cursor: default; }
.carousel-nav.prev { left: -8px; }
.carousel-nav.next { right: -8px; }
.carousel:not(.is-scrollable) .carousel-nav { display: none; }
.carousel-track.is-dragging { cursor: grabbing; scroll-snap-type: none; }
.carousel-hint { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

/* ---------- 使用流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; counter-reset: s; }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; position: relative; }
.step .n { width: 26px; height: 26px; border-radius: 8px; background: var(--primary); color: #fff;
           display: grid; place-items: center; font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.step h4 { margin: 0 0 4px; font-size: 14.5px; }
.step p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* ---------- 聊天 ---------- */
.chat-layout { display: grid; grid-template-columns: 280px 1fr; gap: 0; height: calc(100vh - var(--header)); }
.chat-side { border-right: 1px solid var(--line); background: var(--surface); overflow-y: auto; padding: 14px; }
.chat-main { display: flex; flex-direction: column; min-width: 0; height: 100%; }
.chat-msgs { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.msg { max-width: 860px; width: 100%; margin: 0 auto; display: flex; gap: 12px; }
.msg .avatar { width: 32px; height: 32px; border-radius: 8px; flex: 0 0 32px; display: grid; place-items: center; font-size: 13px; color: #fff; background: var(--primary); }
.msg.user .avatar { background: var(--text); }
.msg .bubble { flex: 1; min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; overflow-wrap: anywhere; }
.msg.user .bubble { background: var(--bubble-user); border-color: var(--line); }
.msg .bubble pre { margin: 8px 0; }
.composer { border-top: 1px solid var(--line); background: var(--surface); padding: 12px 20px; }
.composer-inner { max-width: 860px; margin: 0 auto; display: flex; gap: 10px; align-items: flex-end; }
.composer textarea { min-height: 46px; max-height: 160px; }
.model-bar { display: flex; gap: 8px; align-items: center; padding: 10px 20px; border-bottom: 1px solid var(--line); background: var(--surface-2); flex-wrap: wrap; }
.model-bar select { width: auto; min-width: 200px; }
.typing::after { content: '▌'; animation: blink 1s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }
.tool-note { font-size: 12px; color: var(--muted); border-left: 3px solid var(--primary); padding-left: 10px; margin: 8px 0; }

/* ---------- 设计器 ---------- */
.designer { display: grid; grid-template-columns: 260px 1fr 300px; height: calc(100vh - var(--header)); }
.designer-panel { border-right: 1px solid var(--line); background: var(--surface); overflow-y: auto; padding: 14px; }
.designer-panel.right { border-right: 0; border-left: 1px solid var(--line); }
.designer-canvas { overflow-y: auto; padding: 20px; background: var(--bg); }
.block-item { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 8px; background: var(--surface); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.block-item:hover { border-color: var(--primary); }
.block-item.active { border-color: var(--primary); background: var(--primary-soft); }
.block-add { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 14px; }
.block-add button { padding: 8px; border: 1px dashed var(--line); background: var(--surface); border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text); }
.block-add button:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 后台 ---------- */
.admin-layout { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }
.admin-side { background: var(--sidebar-bg); color: #e5e7eb; padding: 16px 12px; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.admin-side a { display: block; padding: 9px 12px; border-radius: 8px; color: #cbd5e1; font-size: 14px; margin-bottom: 2px; }
.admin-side a:hover, .admin-side a.active { background: rgba(255, 255, 255, .08); color: #fff; text-decoration: none; }
.admin-side .group-title { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: #94a3b8; margin: 16px 12px 6px; }
.admin-main { min-width: 0; background: var(--bg); }
.admin-top { height: var(--header); background: var(--surface); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; padding: 0 20px; position: sticky; top: 0; z-index: 20; }
.admin-content { padding: 20px; }
.kpi { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.kpi .n { font-size: 24px; font-weight: 700; }
.kpi .l { color: var(--muted); font-size: 13px; }

/* ---------- 分页 ---------- */
.pagination { display: flex; gap: 6px; margin-top: 16px; flex-wrap: wrap; }
.pagination a, .pagination span { padding: 6px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); font-size: 13px; color: var(--text); }
.pagination a:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 页脚 ---------- */
.footer { padding: 32px 20px; text-align: center; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); background: var(--surface); margin-top: 40px; }

/* ---------- 暗色主题补充（保证浅色语义块在深底上可读） ---------- */
.theme-dark .badge-ok { background: #052e24; color: #6ee7b7; border-color: #065f46; }
.theme-dark .badge-warn { background: #3a2a07; color: #fcd34d; border-color: #78350f; }
.theme-dark .badge-err { background: #3f1414; color: #fca5a5; border-color: #7f1d1d; }
.theme-dark .alert-error { background: #3f1414; color: #fecaca; border-color: #7f1d1d; }
.theme-dark .alert-success { background: #052e24; color: #a7f3d0; border-color: #065f46; }
.theme-dark .alert-info { background: rgba(255, 255, 255, .06); color: #e5e7eb; border-color: var(--line); }
.theme-dark .preview-surface { background: #ffffff; color: #1f2937; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .designer { grid-template-columns: 220px 1fr; }
  .designer-panel.right { display: none; }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav { position: absolute; top: var(--header); left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--line);
         flex-direction: column; align-items: stretch; padding: 10px; display: none; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .chat-layout { grid-template-columns: 1fr; }
  .chat-side { display: none; }
  .chat-side.open { display: block; position: absolute; z-index: 40; width: 260px; height: calc(100vh - var(--header)); box-shadow: var(--shadow); }
  .designer { grid-template-columns: 1fr; }
  .designer-panel { display: none; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-side { position: fixed; left: -260px; width: 260px; z-index: 60; transition: .2s; }
  .admin-side.open { left: 0; }
}
@media (max-width: 640px) {
  /* 小屏直接用手指滑动，隐藏左右箭头，卡片占满更易操作 */
  .carousel-nav { display: none; }
  .carousel [data-carousel-item] { flex-basis: 78%; max-width: 78%; }
  .section-head { align-items: flex-start; }
}
@media (max-width: 560px) {
  .container { padding: 0 12px; }
  .hero { padding: 36px 0 24px; }
  .carousel [data-carousel-item] { flex-basis: 86%; max-width: 86%; }
  .feature { padding: 15px; }
  .card-body { padding: 14px; }
  table.table th, table.table td { padding: 8px 10px; font-size: 13px; }
  .admin-content { padding: 12px; }
}

/* =========================================================
   1.3.0 新增：Markdown 正文、代码块工具条、源码文件面板、会话删除
   ========================================================= */

/* ---------- Markdown 正文 ---------- */
.md { font-size: 15px; line-height: 1.75; overflow-wrap: anywhere; }
.md > *:first-child { margin-top: 0; }
.md > *:last-child { margin-bottom: 0; }
.md .md-p { margin: 0 0 10px; }
.md .md-h { margin: 18px 0 10px; line-height: 1.35; }
.md h1.md-h { font-size: 22px; }
.md h2.md-h { font-size: 19px; }
.md h3.md-h { font-size: 17px; }
.md h4.md-h, .md h5.md-h, .md h6.md-h { font-size: 15px; }
.md .md-ul, .md .md-ol { margin: 0 0 10px; padding-left: 22px; }
.md .md-li { margin: 3px 0; }
.md .md-li > .md-ul, .md .md-li > .md-ol { margin: 4px 0 0; }
.md .md-quote { margin: 10px 0; padding: 6px 14px; border-left: 3px solid var(--primary); background: var(--surface-2); color: var(--muted); border-radius: 0 8px 8px 0; }
.md .md-quote > *:last-child { margin-bottom: 0; }
.md .md-hr { margin: 16px 0; }
.md .md-table-wrap { overflow-x: auto; margin: 12px 0; }
.md .md-table { border-collapse: collapse; width: 100%; font-size: 13px; }
.md .md-table th, .md .md-table td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; vertical-align: top; }
.md .md-table th { background: var(--surface-2); font-weight: 600; }
.md a { text-decoration: underline; }

/* ---------- 代码块 ---------- */
.md-code { margin: 12px 0; border: 1px solid #1f2937; border-radius: 10px; overflow: hidden; background: #0f172a; }
.md-code.is-applied { border-color: #10b981; }
.md-code-bar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 6px 10px; background: #111c33; border-bottom: 1px solid #1f2937;
  font-size: 12px; color: #94a3b8;
}
.md-code-lang {
  font-size: 10px; letter-spacing: .04em; text-transform: uppercase;
  padding: 1px 6px; border-radius: 4px; background: #1e293b; color: #cbd5e1; border: 1px solid #334155;
}
.md-code-path { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #e2e8f0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 46%; }
.md-code-path.is-empty { color: #64748b; font-style: italic; }
.md-code-grow { flex: 1 1 0; }
.md-code-btn {
  border: 1px solid #334155; background: #1e293b; color: #e2e8f0; cursor: pointer;
  border-radius: 6px; padding: 3px 10px; font-size: 12px; line-height: 1.5; white-space: nowrap;
  text-decoration: none;
}
.md-code-btn:hover { background: #273549; text-decoration: none; }
.md-code-btn:disabled { opacity: .5; cursor: not-allowed; }
.md-code-apply { background: var(--primary); border-color: var(--primary); color: #fff; }
.md-code-apply:hover { background: var(--primary-dark); }
.md-code-done { color: #34d399; font-size: 12px; }
.md-code-edit { display: flex; gap: 6px; align-items: center; flex: 1 1 auto; flex-wrap: wrap; }
.md-code-edit input {
  flex: 1 1 200px; min-width: 140px; background: #0b1220; border: 1px solid #334155; color: #e2e8f0;
  border-radius: 6px; padding: 3px 8px; font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.md-code-edit input:focus { outline: 2px solid var(--primary); outline-offset: 0; }
.md-pre { margin: 0; background: transparent; color: #e2e8f0; padding: 12px 14px; overflow: auto; font-size: 13px; line-height: 1.6; border-radius: 0; }
.md-pre code { background: transparent; border: 0; padding: 0; color: inherit; font-size: inherit; }

/* ---------- 落盘摘要 ---------- */
.apply-bar { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); display: grid; gap: 8px; }
.apply-line { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ---------- 轻提示 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translate(-50%, 12px);
  background: #111827; color: #f9fafb; padding: 9px 16px; border-radius: 10px;
  font-size: 13px; box-shadow: 0 8px 24px rgba(16,24,40,.18); opacity: 0; transition: .22s; z-index: 999;
  max-width: 80vw;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast-ok { background: #065f46; }
.toast-err { background: #991b1b; }
.toast-warn { background: #92400e; }

/* ---------- 侧栏（会话删除） ---------- */
.side-head { display: flex; align-items: center; justify-content: space-between; margin: 14px 0 8px; }
.link-btn { background: none; border: 0; padding: 0; color: var(--primary); font: inherit; font-size: 12px; cursor: pointer; }
.link-btn:hover { text-decoration: underline; }
.conv-item { position: relative; padding-right: 30px; }
.conv-item .conv-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1 1 auto; }
.conv-del {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px; line-height: 1; border: 0; border-radius: 5px;
  background: transparent; color: var(--muted); cursor: pointer; font-size: 16px;
  opacity: .4; transition: .15s;
}
.conv-item:hover .conv-del, .conv-del:focus-visible { opacity: 1; }
.conv-del:hover { background: #fee2e2; color: var(--err); }
.composer-tip { max-width: 860px; margin: 6px auto 0; font-size: 12px; }

/* ---------- 项目页 tabs ---------- */
.designer-head {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 8px 14px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.designer-head .grow, .files-bar .grow { flex: 1 1 auto; }
.tabs { display: inline-flex; gap: 4px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
.tab {
  border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 13px;
  padding: 5px 14px; border-radius: 8px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.tab:hover { color: var(--text); }
.tab.is-active { background: var(--surface); color: var(--text); font-weight: 600; box-shadow: 0 1px 2px rgba(16,24,40,.08); }
.tab .badge { padding: 0 6px; font-size: 11px; }
#paneDesign .designer { height: calc(100vh - var(--header) - 52px); }

/* ---------- 源码文件面板 ---------- */
.files-layout {
  display: grid; grid-template-columns: 280px minmax(0, 1fr);
  height: calc(100vh - var(--header) - 52px); background: var(--surface);
}
.files-tree { border-right: 1px solid var(--line); overflow-y: auto; background: var(--surface); }
.files-tree-head { display: flex; align-items: center; justify-content: space-between; padding: 9px 12px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--surface); }
.files-tree-body { padding: 6px 0 20px; }
.ftree-dirname { font-size: 12px; color: var(--muted); font-weight: 600; padding: 6px 10px 2px; }
.ftree-file {
  display: flex; align-items: center; gap: 7px; width: 100%; border: 0; background: none;
  padding: 5px 10px; cursor: pointer; font: inherit; font-size: 13px; color: var(--text); text-align: left;
}
.ftree-file:hover { background: var(--surface-2); }
.ftree-file.is-active { background: var(--primary-soft); color: var(--primary-dark); }
.ftree-lang { font-size: 9px; color: var(--muted); border: 1px solid var(--line); border-radius: 3px; padding: 0 3px; flex: 0 0 auto; text-transform: uppercase; }
.ftree-name { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ftree-size { font-size: 11px; color: var(--muted); flex: 0 0 auto; }
.files-main { display: flex; flex-direction: column; min-width: 0; overflow: hidden; }
.files-bar { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--surface); }
.files-bar #curPath {
  flex: 0 1 420px; font-size: 12px; padding: 5px 9px; border-radius: 7px;
  border: 1px solid var(--line); background: var(--surface-2); color: var(--text);
}
.files-editor {
  flex: 1 1 auto; width: 100%; border: 0; resize: none; padding: 14px 16px;
  background: #0f172a; color: #e2e8f0; font-size: 13px; line-height: 1.65; tab-size: 4;
}
.files-editor:focus { outline: none; }
.files-status { padding: 6px 12px; border-top: 1px solid var(--line); background: var(--surface-2); }
.btn-ghost.btn-danger { background: var(--surface); color: var(--err); border-color: #fecaca; }
.btn-ghost.btn-danger:hover { background: #fef2f2; }

@media (max-width: 860px) {
  .files-layout { grid-template-columns: 1fr; grid-template-rows: minmax(120px, 30vh) minmax(0, 1fr); height: calc(100vh - var(--header) - 52px); }
  .files-tree { border-right: 0; border-bottom: 1px solid var(--line); }
  .files-bar #curPath { flex: 1 1 auto; }
  .md-code-path { max-width: 100%; flex-basis: 100%; }
  #paneDesign .designer { height: auto; min-height: calc(100vh - var(--header) - 52px); }
}
@media (max-width: 560px) {
  .md-code-bar { gap: 6px; }
  .md-code-btn { padding: 3px 8px; font-size: 11px; }
  .designer-head { padding: 8px 10px; }
  .tab { padding: 5px 10px; font-size: 12px; }
}

/* 窄屏下模型/项目下拉不再强制 200px，避免与其它开关挤成一团 */
@media (max-width: 860px) {
  .model-bar { padding: 8px 12px; }
  .model-bar select { min-width: 130px; max-width: 46vw; }
  .model-bar .small.muted { font-size: 12px; }
}