/* ==========================================================================
   app.css — 多品牌云端维修知识系统 · 样式
   取自原单文件 index.html 内联样式, 结构/类名保持兼容; 另增 admin 内容管理端样式
   ========================================================================== */
:root{
  --bg:#f5f7fa; --card:#ffffff; --ink:#1f2933; --sub:#67727e;
  --line:#e3e8ee; --accent:#1a73e8; --accent2:#0b8043; --warn:#b06000; --danger:#c5221f;
  --chip:#eef3fb; --head1:#1a73e8; --head2:#0b8043;
}
*{box-sizing:border-box;}
body{margin:0;font-family:-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.6;}
header{background:linear-gradient(120deg,#1a73e8,#0b8043);color:#fff;padding:16px 24px;box-shadow:0 2px 8px rgba(0,0,0,.08);}
header .hd{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:1120px;margin:0 auto;}
header h1{margin:0;font-size:20px;font-weight:700;}
header .meta{font-size:12px;opacity:.9;margin-top:2px;}
#userbar{display:flex;align-items:center;gap:10px;font-size:13px;}
#userbar .who{font-weight:600;}
#userbar .role-tag{background:rgba(255,255,255,.22);padding:2px 10px;border-radius:20px;font-size:12px;}
.wrap{max-width:1120px;margin:0 auto;padding:20px 16px 80px;}
/* ---- 左侧竖排导航布局: side(品牌+页签) + main(内容) ---- */
.layout{display:flex;gap:18px;align-items:flex-start;}
.side{width:176px;flex-shrink:0;position:sticky;top:16px;}
.main{flex:1;min-width:0;}
.side-brand{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:12px;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.side-brand select{width:100%;font-weight:600;}
/* 品牌横排按钮(取代原来的下拉框, 全部常驻可见) */
.brand-pills{display:flex;flex-wrap:wrap;gap:4px;}
.brand-pill{display:inline-block;padding:4px 8px;border-radius:6px;font-size:12px;font-weight:600;background:var(--bg);border:1px solid var(--line);cursor:pointer;color:var(--sub);transition:all .15s;line-height:1.4;}
.brand-pill:hover{border-color:var(--accent);color:var(--accent);}
.brand-pill.active{background:var(--accent);color:#fff;border-color:var(--accent);}
.brand-pill.empty{opacity:.55;font-weight:500;}
.brand-pill.empty.active{background:var(--sub);border-color:var(--sub);color:#fff;opacity:1;}
.tabs{display:flex;flex-direction:column;gap:4px;}
.side-group{font-size:11px;color:var(--sub);letter-spacing:2px;padding:10px 10px 2px;user-select:none;}
.tab{padding:9px 12px;border:1px solid transparent;background:transparent;border-radius:8px;cursor:pointer;color:var(--sub);font-weight:600;user-select:none;white-space:nowrap;}
.tab:hover{background:var(--chip);color:var(--accent);}
.tab.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 2px 6px rgba(26,115,232,.3);}
/* 小屏回退: 侧栏变顶部横排(可换行) */
@media(max-width:760px){
  .layout{flex-direction:column;}
  .side{width:100%;position:static;}
  .tabs{flex-direction:row;flex-wrap:wrap;}
  .side-group{display:none;}
  .tab{border:1px solid var(--line);background:var(--card);padding:7px 12px;}
}
.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:0 1px 3px rgba(0,0,0,.04);margin-bottom:16px;}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:12px;}
input,select,textarea{font:inherit;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);}
input[type=text],input[type=number]{min-width:180px;}
textarea{width:100%;min-height:56px;resize:vertical;}
button{padding:9px 18px;border:0;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer;font-weight:600;}
button.ghost{background:var(--chip);color:var(--accent);}
button.ok{background:var(--accent2);}
button.danger{background:var(--danger);}
button:disabled{opacity:.5;cursor:not-allowed;}
.stat{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:14px;}
.stat .s{background:var(--chip);border-radius:8px;padding:8px 14px;font-size:13px;color:var(--sub);}
.stat .s b{color:var(--ink);font-size:16px;display:block;}
.item{border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:10px;cursor:pointer;transition:.15s;background:var(--card);}
.item:hover{border-color:var(--accent);box-shadow:0 2px 8px rgba(26,115,232,.08);}
.item h3{margin:0 0 4px;font-size:15px;}
.item .tag{display:inline-block;font-size:11px;padding:2px 8px;border-radius:6px;background:var(--chip);color:var(--accent);margin-right:6px;}
.item .tag.sys{background:#e8f5e9;color:var(--accent2);}
.item .tag.native{background:#fdecea;color:var(--danger);}
.item .tag.repair{background:#fff3e0;color:var(--warn);}
.item .tag.brand{background:#ede7f6;color:#5e35b1;}
.detail{display:none;margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);color:var(--ink);font-size:13px;}
.item.open .detail{display:block;}
.kv{font-size:13px;margin:4px 0;}
.kv .k{color:var(--sub);display:inline-block;min-width:84px;}
.conf-HIGH{color:var(--accent2);font-weight:700;}
.conf-MED{color:var(--warn);font-weight:700;}
.conf-LOW{color:var(--danger);font-weight:700;}
a.dl{color:var(--accent);text-decoration:none;font-weight:600;}
a.dl:hover{text-decoration:underline;}
.empty{color:var(--sub);padding:20px;text-align:center;}
.hint{font-size:12px;color:var(--sub);margin:4px 0 0;}
.pill{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;margin-right:6px;}
.pill.solved{background:#e8f5e9;color:var(--accent2);}
.pill.partial{background:#fff3e0;color:var(--warn);}
.pill.unresolved{background:#fdecea;color:var(--danger);}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
@media(max-width:760px){.grid2,.grid3{grid-template-columns:1fr;}}
.form-label{font-weight:600;font-size:13px;margin-bottom:2px;display:block;margin-top:8px;}
.muted{color:var(--sub);}

/* ---- admin 内容管理 ---- */
.ctl-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px;}
.ctl-head h3{margin:0;}
.table{width:100%;border-collapse:collapse;font-size:13px;}
.table th,.table td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top;}
.table th{background:var(--chip);font-weight:600;white-space:nowrap;}
.table tr:nth-child(even) td{background:#fafbfc;}
.table .mini-actions{white-space:nowrap;}
.btn-sm{padding:4px 10px;font-size:12px;border-radius:6px;}
.btn-ghost-sm{background:transparent;border:1px solid var(--line);color:var(--accent);padding:4px 10px;font-size:12px;border-radius:6px;}
.toast{position:fixed;top:70px;left:50%;transform:translateX(-50%);background:#333;color:#fff;padding:10px 20px;border-radius:8px;font-size:13px;z-index:999;box-shadow:0 4px 12px rgba(0,0,0,.2);opacity:0;transition:opacity .25s;pointer-events:none;}
.toast.show{opacity:1;}
.form-grid label{display:block;}
.modal-back{position:fixed;inset:0;background:rgba(0,0,0,.35);display:flex;align-items:flex-start;justify-content:center;z-index:900;padding:40px 16px;overflow:auto;}
.modal{background:var(--card);border-radius:14px;max-width:720px;width:100%;padding:22px;box-shadow:0 12px 40px rgba(0,0,0,.25);}
.modal h3{margin:0 0 12px;}
.modal .close-x{float:right;cursor:pointer;color:var(--sub);font-size:20px;}
.code-pill{font-family:Consolas,Monaco,monospace;background:var(--chip);padding:1px 6px;border-radius:5px;font-size:12px;}

/* ---- FAQ 官网式三层导航 (大类 → 车型卡片 → 问题分类+问题列表) ---- */
.faq-layout{display:flex;gap:16px;align-items:flex-start;}
.faq-side{width:210px;flex-shrink:0;background:#fbfcfd;border:1px solid var(--line);border-radius:12px;padding:10px;}
.faq-side-title{font-weight:700;padding:6px 10px 10px;font-size:14px;}
.faq-back{cursor:pointer;color:var(--accent);font-size:13px;padding:2px 10px 8px;user-select:none;}
.faq-back:hover{text-decoration:underline;}
.faq-side-item{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;border-radius:8px;cursor:pointer;font-size:14px;user-select:none;}
.faq-side-item:hover{background:#f0f4fa;}
.faq-side-item.on{background:#e8f0fe;color:var(--accent);font-weight:600;}
.faq-badge{font-style:normal;background:var(--accent);color:#fff;border-radius:20px;font-size:11px;padding:1px 8px;flex-shrink:0;}
.faq-main{flex:1;min-width:0;}
.faq-main-title{font-weight:600;font-size:15px;margin:0 0 12px;}
.faq-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;}
.faq-card{background:#f7f8fa;border:1px solid transparent;border-radius:12px;padding:14px 10px 12px;text-align:center;cursor:pointer;transition:.15s;user-select:none;}
.faq-card:hover{border-color:var(--accent);background:#fff;box-shadow:0 2px 10px rgba(26,115,232,.1);}
.faq-card-img{height:86px;display:flex;align-items:center;justify-content:center;margin-bottom:8px;}
.faq-card-img img{max-height:80px;max-width:92%;object-fit:contain;}
.faq-card-noimg{font-size:34px;opacity:.4;}
.faq-card-name{font-size:13px;color:var(--ink);}
.faq-card-badge{display:inline-block;margin-top:6px;font-size:11px;color:var(--accent);background:#e8f0fe;border-radius:20px;padding:1px 8px;}
.faq-qlist{background:#fbfcfd;border:1px solid var(--line);border-radius:12px;padding:6px 0;max-height:70vh;overflow:auto;}
.faq-qitem{border-bottom:1px solid #eef1f5;}
.faq-qitem:last-child{border-bottom:none;}
.faq-qtitle{padding:13px 18px;cursor:pointer;font-size:14px;user-select:none;}
.faq-qtitle:hover{background:#f0f4fa;color:var(--accent);}
.faq-qdetail{padding:4px 18px 16px;background:#fff;border-top:1px dashed var(--line);}
.faq-rich{font-size:14px;line-height:1.8;word-break:break-word;}
.faq-rich img{max-width:100%;border-radius:8px;margin:6px 0;}
@media(max-width:760px){.faq-layout{flex-direction:column;}.faq-side{width:100%;}}

/* ============ 车辆说明书入口(manual 模式: 小牛等) ============
   复用 .faq-* 样式保持视觉一致, 仅新增 manual 专属(.manual-*) 用于二级 tab + PDF 列表 */
.manual-page{background:#fff;border-radius:12px;overflow:hidden;}
.manual-tabs{display:flex;gap:28px;border-bottom:2px solid #eee;padding:0 24px;}
.manual-tab{padding:14px 4px;color:#888;cursor:default;font-size:15px;font-weight:500;border-bottom:3px solid transparent;margin-bottom:-2px;}
.manual-tab.on{color:var(--ink);font-weight:700;border-bottom-color:#c00;}
.manual-card{background:#fbfcfd;border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-top:18px;}
.manual-title{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px;border-bottom:1px solid var(--line);padding-bottom:10px;}
.manual-title-name{font-weight:700;font-size:18px;}
.manual-back{color:var(--accent);font-size:13px;cursor:pointer;text-decoration:none;}
.manual-back:hover{text-decoration:underline;}
.manual-list{display:flex;flex-direction:column;gap:8px;}
.manual-item{display:flex;align-items:center;gap:12px;padding:13px 18px;background:#f7f8fa;border-radius:10px;text-decoration:none;color:var(--ink);transition:.15s;}
.manual-item:hover{background:#fff;border:1px solid var(--accent);padding:12px 17px;}
.manual-item-icon{font-size:20px;}
.manual-item-title{flex:1;font-size:14px;}
.manual-item-arrow{color:#bbb;font-size:18px;}
.manual-item:hover .manual-item-arrow{color:var(--accent);}