/* site.css — 官网前台样式 */
:root{
  --brand:#1361d8; --brand-2:#0c4aa6; --accent:#0fb3c4; --accent-2:#0e8fa6;
  --ink:#16233d; --ink-2:#3a4a68; --muted:#71809a; --muted-2:#9aa8bf;
  --bg:#f5f8fd; --card:#fff; --line:#e3e9f4; --line-2:#eef3fa;
  --ok:#12a150; --warn:#e08a00; --danger:#d63d3d;
  --radius:14px; --radius-lg:20px;
  --shadow:0 6px 24px rgba(21,47,94,.08);
  --shadow-lg:0 18px 48px rgba(18,45,95,.14);
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 顶部导航 ---------- */
.topbar{background:var(--ink);color:#c9d6ea;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar .l span{margin-right:18px}
.topbar b{color:#fff;font-weight:500}
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .2s}
.nav.scrolled{box-shadow:0 4px 20px rgba(20,45,90,.08)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:14px}
.logo{display:flex;align-items:center;gap:11px;font-weight:600;font-size:19px;letter-spacing:.2px}
.logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--accent));
  display:grid;place-items:center;color:#fff;flex:none}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:1.4px;margin-top:-3px}
/* 菜单项禁止换行：宽度不够时整体收进汉堡菜单，绝不出现「首/页」竖排 */
.menu{display:flex;align-items:center;gap:2px;flex:none}
.menu a{padding:9px 10px;border-radius:9px;font-size:14px;color:var(--ink-2);transition:.16s;white-space:nowrap}
.menu a:hover{background:var(--line-2);color:var(--brand)}
.menu a.on{color:var(--brand);font-weight:500;background:#eaf2ff}
.nav-cta{display:flex;align-items:center;gap:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:11px 20px;border-radius:10px;
  border:1px solid transparent;font-size:15px;font-weight:500;cursor:pointer;transition:.18s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(19,97,216,.28)}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-1px);box-shadow:0 8px 20px rgba(19,97,216,.34)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:15px 30px;font-size:16.5px;border-radius:12px}
.btn-sm{padding:7px 13px;font-size:13.5px;border-radius:8px}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 10px;cursor:pointer}

/* 中等宽度：先收起「查保修」按钮（菜单里已有保修查询） */
@media (max-width:1240px){
  .nav-cta .btn-ghost{display:none}
}
/* 老式 1024 宽屏（如 1024x768 4:3）：收紧菜单内距与间距，保证 9 个菜单项 + 在线报修按钮放得下 */
@media (max-width:1180px){
  .menu a{padding:9px 6px;font-size:13.5px}
  .nav .wrap{gap:10px}
}
/* 窄屏：整排菜单收进汉堡按钮 */
@media (max-width:999px){
  .menu{display:none}
  .menu.open{display:flex;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);gap:2px}
  .burger{display:block}
}

/* ---------- 英雄区 ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#0b2a5e 0%,#123a80 46%,#0d5b8f 100%);color:#fff}
.hero::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:52px 52px}
.hero::after{content:"";position:absolute;width:520px;height:520px;right:-160px;top:-190px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,179,196,.34),transparent 68%)}
.hero .wrap{position:relative;z-index:2;padding:76px 20px 84px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.hero h1{font-size:42px;line-height:1.24;margin:0 0 18px;font-weight:600;letter-spacing:-.4px}
.hero h1 em{font-style:normal;color:#57e0ee}
.hero p.lead{font-size:17px;color:#c2d4ee;margin:0 0 30px;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero .btn-ghost{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);color:#fff}
.hero .btn-ghost:hover{background:rgba(255,255,255,.18);border-color:#fff;color:#fff}
.hero-stats{display:flex;gap:38px;flex-wrap:wrap;padding-top:24px;border-top:1px solid rgba(255,255,255,.16)}
.hero-stats b{display:block;font-size:27px;font-weight:600;letter-spacing:-.5px}
.hero-stats span{font-size:13px;color:#a8c1e2}
.hero-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius-lg);
  padding:24px;backdrop-filter:blur(10px)}
.hero-card h3{margin:0 0 4px;font-size:16px;font-weight:500}
.hero-card p{margin:0 0 18px;font-size:13px;color:#a8c1e2}
.quick{display:grid;gap:10px}
.quick a{display:flex;align-items:center;gap:12px;padding:13px 15px;border-radius:12px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);transition:.18s;font-size:14.5px}
.quick a:hover{background:rgba(255,255,255,.2);transform:translateX(3px)}
.quick .ico{width:34px;height:34px;border-radius:9px;background:rgba(87,224,238,.2);display:grid;place-items:center;flex:none;color:#57e0ee}
.quick small{display:block;font-size:12px;color:#a8c1e2;font-weight:400}

/* ---------- 通用区块 ---------- */
section{padding:74px 0}
.sec-head{text-align:center;max-width:660px;margin:0 auto 46px}
.sec-head .tag{display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--brand);font-weight:500;
  background:#eaf2ff;padding:5px 13px;border-radius:20px;margin-bottom:14px}
.sec-head h2{font-size:31px;margin:0 0 12px;font-weight:600;letter-spacing:-.3px}
.sec-head p{margin:0;color:var(--muted);font-size:15.5px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s}
.card:hover{border-color:#cfe0fa;box-shadow:var(--shadow);transform:translateY(-3px)}
.card .ico{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,#e8f1ff,#e2f7fa);color:var(--brand)}
.card h3{margin:0 0 9px;font-size:18px;font-weight:600}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.card ul{margin:12px 0 0;padding:0;list-style:none;font-size:14px;color:var(--ink-2)}
.card ul li{padding:4px 0 4px 20px;position:relative}
.card ul li::before{content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--brand);font-size:14px;font-weight:500}

/* ---------- 服务流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;position:relative}
.step::after{content:"";position:absolute;right:-13px;top:38px;width:10px;height:10px;border-top:2px solid #c8d8f0;border-right:2px solid #c8d8f0;transform:rotate(45deg)}
.step:last-child::after{display:none}
.step b{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:#eaf2ff;color:var(--brand);
  font-size:14px;margin-bottom:12px}
.step h4{margin:0 0 6px;font-size:15.5px;font-weight:600}
.step p{margin:0;font-size:13px;color:var(--muted);line-height:1.55}

/* ---------- 优势 ---------- */
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv .item{text-align:center;padding:28px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.adv .item .ico{width:46px;height:46px;margin:0 auto 14px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,#e8f1ff,#e2f7fa);color:var(--brand)}
.adv .item h4{margin:0 0 7px;font-size:16px;font-weight:600}
.adv .item p{margin:0;font-size:13.5px;color:var(--muted)}

/* ---------- 表格 / 表单 ---------- */
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px}
.field{margin-bottom:17px}
.field label{display:block;font-size:13.5px;font-weight:500;margin-bottom:7px;color:var(--ink-2)}
.field label i{color:var(--danger);font-style:normal}
.input,select.input,textarea.input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  background:#fbfcfe;transition:.16s;font-size:14.5px;color:var(--ink)}
.input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(19,97,216,.1)}
textarea.input{resize:vertical;min-height:96px;line-height:1.6}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hint{font-size:12.5px;color:var(--muted);margin-top:6px}
.alert{padding:13px 16px;border-radius:11px;font-size:14px;margin-bottom:18px;display:none}
.alert.show{display:block}
.alert-err{background:#fdeeee;color:#a32424;border:1px solid #f6d5d5}
.alert-ok{background:#eaf8f0;color:#0d7a3c;border:1px solid #c9ecd8}
.alert-info{background:#eef4ff;color:#1257bd;border:1px solid #d5e4fb}

/* ---------- 查询结果 ---------- */
.result{margin-top:22px;display:none}
.result.show{display:block;animation:rise .3s ease}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.kv{display:grid;grid-template-columns:132px 1fr;gap:11px 18px;font-size:14.5px}
.kv dt{color:var(--muted)}
.kv dd{margin:0;font-weight:500}
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 11px;border-radius:20px;font-size:12.5px;font-weight:500}
.b-ok{background:#eaf8f0;color:#0d7a3c}
.b-warn{background:#fdf4e3;color:#a2680a}
.b-danger{background:#fdeeee;color:#b02b2b}
.b-info{background:#eaf2ff;color:#1257bd}
.b-gray{background:#eef1f6;color:#5d6b84}
.ticket-no{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:19px;letter-spacing:.6px;font-weight:600;color:var(--brand)}

/* ---------- 时间线 ---------- */
.timeline{margin:20px 0 0;padding:0;list-style:none}
.timeline li{position:relative;padding:0 0 20px 26px;border-left:2px solid var(--line)}
.timeline li:last-child{border-left-color:transparent;padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-7px;top:5px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:2.5px solid #c8d8f0}
.timeline li.done::before{border-color:var(--ok);background:var(--ok)}
.timeline b{display:block;font-size:14.5px;font-weight:500}
.timeline span{font-size:12.5px;color:var(--muted)}
.timeline p{margin:4px 0 0;font-size:13.5px;color:var(--ink-2)}

/* ---------- 页脚 ---------- */
footer{background:var(--ink);color:#9fb1cc;padding:56px 0 26px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:34px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
footer h4{color:#fff;font-size:15px;margin:0 0 15px;font-weight:500}
footer a:hover{color:#57e0ee}
footer ul{margin:0;padding:0;list-style:none}
footer ul li{padding:5px 0}
/* 页脚微信：悬停/点按弹出公众号二维码 */
.wx-hover{position:relative;cursor:pointer}
.wx-hover .wx-hint{font-style:normal;font-size:11px;color:#57e0ee;border:1px solid rgba(87,224,238,.45);border-radius:99px;padding:1px 8px;margin-left:4px;white-space:nowrap}
.wx-pop{display:none;position:absolute;bottom:calc(100% + 12px);left:-14px;z-index:30;width:172px;background:#fff;color:#41536b;
  border-radius:10px;padding:12px 12px 10px;text-align:center;box-shadow:0 10px 34px rgba(6,20,45,.45);cursor:default}
.wx-pop::after{content:'';position:absolute;top:100%;left:26px;border:7px solid transparent;border-top-color:#fff}
.wx-pop img{display:block;margin:0 auto 7px;border-radius:6px;background:#fff}
.wx-pop b{display:block;font-size:13px;color:#1361d8}
.wx-pop span{display:block;font-size:11.5px;color:#7b8fa8;margin-top:3px;line-height:1.5}
.wx-hover:hover .wx-pop,.wx-hover.open .wx-pop{display:block}
@media (max-width:768px){
  .wx-hover .wx-hint{display:inline}
  .wx-pop{left:auto;right:-10px}
  .wx-pop::after{left:auto;right:22px}
}
/* 公众号引导页的二维码卡片（白底 + 细边框，微信识别更稳） */
.qr-box{width:214px;height:214px;margin:0 auto 16px;border:1px solid var(--line);border-radius:14px;
  background:#fff;display:grid;place-items:center;overflow:hidden;
  box-shadow:0 1px 2px rgba(15,35,70,.05),0 8px 22px rgba(15,35,70,.06)}
.qr-box img{display:block;width:190px;height:190px}
@media (max-width:420px){.qr-box{width:186px;height:186px}.qr-box img{width:164px;height:164px}}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;padding-top:22px;font-size:13px;color:#7b8fa8;flex-wrap:wrap}
.foot-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:600;margin-bottom:14px}

/* ---------- 浮动联系 ---------- */
.floaty{position:fixed;right:20px;bottom:24px;z-index:60;display:flex;flex-direction:column;gap:10px}
.floaty a{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow);color:var(--brand);transition:.2s}
.floaty a:hover{background:var(--brand);color:#fff;transform:translateY(-3px)}

/* ---------- 左下角 AI 悬浮入口（问 AI） ---------- */
.ai-fab{position:fixed;left:min(240px,38vw);bottom:180px;z-index:60;display:flex;flex-direction:column;align-items:flex-start;gap:9px}
.ai-fab-btn{display:flex;align-items:center;gap:9px;padding:6px 16px 6px 7px;border-radius:999px;text-decoration:none;
  background:linear-gradient(135deg,#4f8cff,#1361d8);color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;
  box-shadow:0 10px 24px rgba(19,97,216,.35);transition:.2s}
.ai-fab-btn:hover{color:#fff;transform:translateY(-3px);box-shadow:0 14px 28px rgba(19,97,216,.45)}
.ai-fab-face{width:38px;height:38px;border-radius:50%;background:#fff;display:grid;place-items:center;overflow:hidden;flex:none}
.ai-fab-face svg{display:block}
.ai-fab-tip{position:relative;display:flex;align-items:center;gap:7px;max-width:250px;padding:9px 30px 9px 12px;
  background:linear-gradient(135deg,#2f9e5f,#25b86b);color:#fff;border-radius:12px;border-bottom-left-radius:4px;
  font-size:13px;line-height:1.5;box-shadow:0 8px 20px rgba(37,184,107,.32);
  opacity:0;transform:translateY(8px);pointer-events:none;transition:.35s}
.ai-fab-tip.show{opacity:1;transform:none;pointer-events:auto}
.ai-fab-tip svg{flex:none}
.ai-fab-x{position:absolute;top:3px;right:5px;width:19px;height:19px;border:0;border-radius:50%;
  background:rgba(255,255,255,.22);color:#fff;font-size:12px;line-height:1;cursor:pointer;display:grid;place-items:center;padding:0}
.ai-fab-x:hover{background:rgba(255,255,255,.42)}
@media (max-width:680px){
  .ai-fab{left:min(220px,36vw);bottom:150px;gap:7px}
  .ai-fab-btn{padding:4px 12px 4px 5px;font-size:13.5px}
  .ai-fab-face{width:30px;height:30px}
  .ai-fab-face svg{width:26px;height:26px}
  .ai-fab-tip{max-width:200px;font-size:12.5px}
}
@media print{.ai-fab,.floaty{display:none}}

/* ---------- 两栏 / 查询表单 / 引导页布局 ----------
   统一用类 + 媒体查询，窄屏自动收成单列（内联 grid 无法被媒体查询覆盖，是手机端溢出的根源） */
.split,.wx-grid,.qform{display:grid;align-items:start}
.split{gap:30px}
.split>*{min-width:0}
.split.sv{grid-template-columns:1.5fr 1fr;gap:34px}
.split.ct{grid-template-columns:1fr 1.15fr}
.split.rp{grid-template-columns:1.6fr 1fr;gap:28px}
.wx-grid{grid-template-columns:300px 1fr;gap:30px;margin-bottom:30px}
.wx-grid>*{min-width:0}
.sidecard{position:sticky;top:90px}
.qform{gap:14px;align-items:end}
.qform.q3{grid-template-columns:1fr 1fr auto}
.qform.q2{grid-template-columns:1fr auto}
.qform .field{margin-bottom:0}
/* 仅在汉堡菜单里出现的「在线报修」入口（窄屏下导航 CTA 按钮被隐藏后仍保有报修入口） */
.menu a.m-only{display:none;color:var(--brand);font-weight:500;background:#eaf2ff}

/* ---------- 浮动联系按钮：小屏收小，避免遮挡内容 ---------- */
@media (max-width:680px){
  .floaty{right:12px;bottom:14px;gap:8px}
  .floaty a{width:42px;height:42px;border-radius:12px}
}

@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:33px}
  .g4,.g3,.adv{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
  .split.sv,.split.ct,.split.rp,.wx-grid{grid-template-columns:1fr;gap:24px}
  .sidecard{position:static}
}
@media (max-width:680px){
  .topbar .l span:nth-child(2){display:none}
  .nav-cta .btn-primary{display:none}
  .hero .wrap{padding:52px 20px 60px}
  .hero h1{font-size:27px}
  .g4,.g3,.g2,.adv,.steps,.form-row{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .foot-grid{grid-template-columns:1fr}
  section{padding:52px 0}
  .panel{padding:20px}
  .kv{grid-template-columns:1fr;gap:2px 0}
  .kv dd{margin-bottom:9px}
  .qform.q3,.qform.q2{grid-template-columns:1fr}
  .menu.open a.m-only{display:block;margin-top:6px;text-align:center}
}

/* ---------- 知识库（帮助中心） ---------- */
.kb-search{display:flex;align-items:center;gap:10px;max-width:660px;margin-bottom:18px}
.kb-field{position:relative;flex:1;display:flex;min-width:0}
.kb-search .input{flex:1;padding-left:40px;height:44px}
.kb-search-ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);display:flex}
.kb-search .btn{height:44px;padding:0 22px;white-space:nowrap}
.kb-count{font-size:13.5px;color:var(--muted);margin:-8px 0 16px}
.kb-count b{color:var(--brand);font-size:15px}
.kb-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.kb-tabs a{padding:8px 15px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--ink-2);
  background:#fff;white-space:nowrap;transition:.16s}
.kb-tabs a:hover{border-color:#c7d9f5;color:var(--brand)}
.kb-tabs a.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:500}
.kb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.kb-grid>*{min-width:0}
.kb-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;box-shadow:var(--shadow);transition:.18s}
.kb-card:hover{transform:translateY(-2px);border-color:#c7d9f5;box-shadow:0 10px 26px rgba(20,45,90,.1)}
.kb-card h3{margin:10px 0 8px;font-size:16.5px;font-weight:600;line-height:1.45;color:var(--ink)}
.kb-card p{margin:0;font-size:13.8px;color:var(--ink-2);line-height:1.75;flex:1}
.kb-card .kb-meta{margin-top:14px;padding-top:12px;border-top:1px solid var(--line-2)}
.kb-tag{display:inline-flex;align-items:center;gap:5px;align-self:flex-start;padding:3px 10px;border-radius:999px;
  background:#eaf2ff;color:var(--brand);font-size:12.5px;font-weight:500;white-space:nowrap}
.kb-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.8px;color:var(--muted)}
.kb-meta i{display:inline-flex;align-items:center;gap:4px;font-style:normal;color:var(--brand)}
.kb-cta{display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
  background:linear-gradient(135deg,#f2f7ff,#eaf2ff);border:1px solid #d8e6fb;border-radius:var(--r);padding:22px 24px}
.kb-cta b{display:block;font-size:16.5px;margin-bottom:6px}
.kb-cta p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.7;max-width:620px}
.kb-cta-btns{display:flex;gap:10px;flex-wrap:wrap}
.kb-crumb{background:#f5f8fd;border-bottom:1px solid var(--line);font-size:13.5px;color:var(--muted)}
.kb-crumb .wrap{display:flex;align-items:center;gap:8px;height:44px;flex-wrap:wrap}
.kb-crumb a{color:var(--ink-2)}
.kb-crumb i{font-style:normal;color:var(--brand)}
.kb-detail{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;align-items:start}
.kb-detail>*{min-width:0}
.kb-article{padding:30px 32px}
.kb-article h1{margin:0 0 12px;font-size:26px;line-height:1.4}
.kb-byline{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted);
  padding-bottom:16px;border-bottom:1px solid var(--line-2)}
.kb-byline>span{display:inline-flex;align-items:center;gap:5px}
.kb-lead{margin:18px 0 0;padding:14px 16px;background:#f7fafe;border-left:3px solid var(--brand);border-radius:0 9px 9px 0;
  font-size:14.5px;color:var(--ink-2);line-height:1.8}
.kb-body{margin-top:20px;font-size:15px;line-height:1.95;color:var(--ink-2)}
.kb-body h3{margin:28px 0 12px;font-size:18.5px;color:var(--ink);font-weight:600;padding-left:11px;border-left:3px solid var(--brand)}
.kb-body h4{margin:22px 0 10px;font-size:16.5px;color:var(--ink);font-weight:600}
.kb-body p{margin:0 0 14px}
.kb-body ul,.kb-body ol{margin:0 0 16px;padding-left:22px}
.kb-body li{margin-bottom:8px}
.kb-body strong{color:var(--ink);font-weight:600}
.kb-body code{background:#f1f5fb;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:13.5px;color:var(--brand)}
.kb-body blockquote{margin:0 0 16px;padding:12px 16px;background:#f8fbff;border-left:3px solid #b9d2f7;border-radius:0 9px 9px 0}
.kb-body img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line);display:block;margin:16px 0}
.kb-body .md-fig{margin:18px 0}
.kb-side-h{display:flex;align-items:center;gap:8px;margin:0 0 14px;font-size:16px;font-weight:600}
.kb-rel-list{display:flex;flex-direction:column;gap:12px}
.kb-rel{display:flex;flex-direction:column;gap:6px;padding:13px 14px;border:1px solid var(--line);border-radius:11px;
  transition:.16s;background:#fff}
.kb-rel:hover{border-color:#c7d9f5;background:#f9fbff}
.kb-rel b{font-size:14.5px;font-weight:600;line-height:1.5;color:var(--ink)}
.kb-rel .kb-meta{font-size:12.5px}
.kb-foot-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:20px}
.kb-side{min-width:0}
@media (max-width:980px){
  .kb-grid{grid-template-columns:repeat(2,1fr)}
  .kb-detail{grid-template-columns:1fr;gap:20px}
  .kb-article{padding:24px 22px}
}
@media (max-width:680px){
  .kb-grid{grid-template-columns:1fr}
  .kb-search{flex-wrap:wrap}
  .kb-field{flex:1 1 100%}
  .kb-search .input{height:42px}
  .kb-search .btn{flex:1;height:40px;padding:0 14px}
  .kb-search .btn-ghost{flex:0 0 auto}
  .kb-article{padding:20px 18px}
  .kb-article h1{font-size:22px}
  .kb-body{font-size:14.5px}
  .kb-cta{flex-direction:column;align-items:stretch;gap:16px;padding:18px}
  .kb-cta-btns{flex-direction:column}
  .kb-cta-btns .btn{width:100%;justify-content:center}
}

/* ---------- AI 问答页 ---------- */
.ask-hero{background:linear-gradient(180deg,#eef5ff 0%,var(--bg) 100%);padding:52px 0 30px}
.ask-head{text-align:center;max-width:720px;margin:0 auto 26px}
.ask-badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--brand);
  background:#fff;border:1px solid #d5e4fb;padding:6px 14px;border-radius:999px;margin-bottom:16px}
.ask-head h1{margin:0 0 12px;font-size:32px;font-weight:600;letter-spacing:-.3px}
.ask-head p{margin:0;color:var(--muted);font-size:15.5px}
.ask-head p b{color:var(--ink-2);font-weight:500}
.ask-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:18px;
  box-shadow:var(--shadow);max-width:820px;margin:0 auto}
.ask-input{display:flex;gap:12px;align-items:flex-end}
.ask-input textarea{flex:1;min-width:0;resize:none;border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;font-size:15px;line-height:1.6;color:var(--ink);background:#fbfcfe;
  max-height:160px;overflow-y:auto;transition:border-color .18s,background .18s}
.ask-input textarea:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(19,97,216,.09)}
.ask-input textarea:disabled{background:#f4f6fa;color:var(--muted);cursor:not-allowed}
.ask-input .btn{flex:0 0 auto;height:46px;padding:0 22px}
.ask-tip{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:10px;
  font-size:12.5px;color:var(--muted-2);padding:0 2px}
.ask-chars b{font-weight:500;color:var(--muted)}
.ask-examples{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:14px;
  padding-top:14px;border-top:1px dashed var(--line)}
.ask-examples>span{font-size:13px;color:var(--muted-2)}
.ask-ex{background:#f2f7ff;border:1px solid #dbe9fd;color:var(--brand);border-radius:999px;
  padding:6px 13px;font-size:13px;cursor:pointer;transition:.16s;font-family:inherit}
.ask-ex:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.ask-off{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:14px;padding:12px 14px;
  background:#fff8ec;border:1px solid #f6e2bd;border-radius:12px;font-size:14px;color:#8a5a00}
.ask-off a{color:var(--brand);font-weight:500;text-decoration:underline}
.ask-off b{color:var(--ink-2)}

/* 快捷追问：每条 AI 回答下方，点一下即作为新问题发送 */
.ask-follow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;width:100%;margin-top:10px;
  padding-top:10px;border-top:1px dashed var(--line)}
.ask-follow>span{font-size:12.5px;color:var(--muted-2)}
.ask-fup{background:#f2f7ff;border:1px solid #dbe9fd;color:var(--brand);border-radius:999px;
  padding:5px 12px;font-size:12.5px;cursor:pointer;transition:.16s;font-family:inherit}
.ask-fup:hover{background:var(--brand);border-color:var(--brand);color:#fff}

/* 对话开始后：输入框吸底常驻，随时可以追加问题（聊天式） */
body.ask-chat{padding-bottom:150px}
.ask-chat .ask-box{position:fixed;left:0;right:0;bottom:0;z-index:80;max-width:856px;
  margin:0 auto;border-radius:18px 18px 0 0;border-bottom:0;padding:12px 16px 14px;
  box-shadow:0 -10px 34px rgba(15,40,80,.15)}
.ask-chat .ask-examples,.ask-chat .ask-tip,.ask-chat .ask-off{display:none}

.ask-main{padding:26px 0 42px}
.ask-msgs{max-width:820px;margin:0 auto}
.ask-empty{max-width:820px;margin:0 auto;text-align:center;padding:44px 20px;color:var(--muted)}
.ask-empty .ico{display:inline-flex;align-items:center;justify-content:center;width:58px;height:58px;
  border-radius:18px;background:#eaf2ff;color:var(--brand);margin-bottom:14px}
.ask-empty h3{margin:0 0 8px;font-size:17px;font-weight:500;color:var(--ink-2)}
.ask-empty p{margin:0 auto;max-width:460px;font-size:14.5px;line-height:1.7}

.ask-msg{display:flex;gap:12px;margin-bottom:20px;align-items:flex-start}
.ask-msg.me{justify-content:flex-end}
.ask-msg .avatar{flex:0 0 auto;width:34px;height:34px;border-radius:11px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:12.5px;font-weight:600;letter-spacing:.5px}
.ask-msg .bubble{max-width:calc(100% - 46px);border-radius:16px;padding:15px 18px;font-size:15px;line-height:1.75}
.ask-msg.me .bubble{background:var(--brand);color:#fff;border-bottom-right-radius:5px}
.ask-msg.ai .bubble{background:#fff;border:1px solid var(--line);border-bottom-left-radius:5px;
  box-shadow:0 2px 10px rgba(21,47,94,.05)}
.ask-msg .ans p{margin:0 0 10px}
.ask-msg .ans p:last-child{margin-bottom:0}
.ask-msg .ans ul,.ask-msg .ans ol{margin:8px 0 12px;padding-left:22px}
.ask-msg .ans li{margin:4px 0}
.ask-msg .ans strong{font-weight:600;color:var(--ink)}
.ask-msg .ans code{background:#f1f5fb;border:1px solid var(--line);border-radius:5px;padding:1px 6px;
  font-size:13.5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.src-wrap{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 12px;padding:0 0 12px;
  border-bottom:1px dashed var(--line);font-size:13px}
.src-label{color:var(--muted-2);flex:0 0 auto}
.src-wrap a{background:#f2f7ff;border:1px solid #dbe9fd;color:var(--brand);border-radius:8px;
  padding:3px 10px;font-size:12.5px;transition:.16s}
.src-wrap a:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.ans-foot{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:14px;padding-top:12px;
  border-top:1px dashed var(--line)}
.ans-meta{font-size:12.5px;color:var(--muted-2);margin-right:auto}
.ans-err{color:var(--danger)}
.think-txt{font-size:14px;color:var(--muted);margin-left:8px}
.typing{display:inline-flex;gap:4px;vertical-align:middle}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.4;
  animation:askBlink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}
.typing i:nth-child(3){animation-delay:.4s}
@keyframes askBlink{0%,60%,100%{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}

.ask-foot-cta{padding:0 0 66px}
.ask-cta{display:flex;justify-content:space-between;align-items:center;gap:26px;flex-wrap:wrap}
.ask-cta h2{margin:0 0 7px;font-size:22px;font-weight:600}
.ask-cta p{margin:0;color:var(--muted)}
.ask-cta-btns{display:flex;gap:12px;flex-wrap:wrap}

@media (max-width:820px){
  .ask-hero{padding:36px 0 24px}
  .ask-head h1{font-size:24px}
  .ask-head p{font-size:14.5px}
  .ask-box{padding:14px}
  .ask-input{flex-direction:column;align-items:stretch}
  .ask-input .btn{width:100%;justify-content:center;height:44px}
  .ask-msg .bubble{font-size:14.5px;padding:13px 15px}
  .ask-msg .avatar{width:30px;height:30px;font-size:12px}
  .ask-msg .bubble{max-width:calc(100% - 42px)}
  .ask-empty{padding:30px 16px}
  .ask-cta{flex-direction:column;align-items:stretch;gap:16px}
  .ask-cta-btns{flex-direction:column}
  .ask-cta-btns .btn{width:100%;justify-content:center}
  .ask-foot-cta{padding:0 0 46px}
  .ask-chat .ask-box{padding:10px 12px 12px}
  .ask-chat .ask-input .btn{height:42px}
  .ask-follow .ask-fup{padding:5px 10px;font-size:12px}
}
@media (max-width:820px){
  body.ask-chat{padding-bottom:190px}
}