/* ======= 顶部导航栏（与 index/products.html 统一） ======= */
:root{
  --nav-red:#D8402A;
  --nav-red-deep:#AE2B16;
  --nav-red-soft:#FDEDE6;
  --nav-ink:#241A12;
  --nav-ink-2:#6E5D4E;
  --nav-line:#E9DED2;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:#222833;background:#fff;font-family:Roboto,-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.top-bar{background:var(--nav-ink);color:#fff;font-size:12px;padding:8px 0;font-family:'Inter',Arial,Helvetica,sans-serif}
.top-bar-inner{max-width:1650px;margin:0 auto;padding:0 70px;display:flex;justify-content:space-between;align-items:center}
.top-bar-left{display:flex;gap:24px;align-items:center}
.top-bar a{color:#fff;text-decoration:none;opacity:.85;transition:opacity .15s;display:inline-flex;align-items:center;gap:6px;line-height:normal}
.top-bar a:hover{opacity:1}
.top-bar-right{display:flex;gap:16px;align-items:center}
.top-bar-right a{opacity:.6}
  .top-bar-right a:hover{opacity:1}
.top-bar svg{width:14px;height:14px}
.main-nav{background:#fff;border-bottom:1px solid var(--nav-line);position:sticky;top:0;z-index:1000;box-shadow:0 1px 4px rgba(168,72,38,.04);font-family:'Inter',Arial,Helvetica,sans-serif}
.main-nav-inner{max-width:1650px;margin:0 auto;padding:0 70px;display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo img{height:40px;width:auto;display:block}
.logo-text{line-height:1.1;font-size:16px;font-weight:700;color:var(--nav-ink)}
.logo-text small{display:block;font-size:10px;font-weight:600;color:var(--nav-ink-2);letter-spacing:.05em;text-transform:uppercase;margin-top:2px}
.menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.menu-item{position:relative}
.menu-link{display:flex;align-items:center;gap:5px;padding:8px 14px;font-size:15px;font-weight:500;color:var(--nav-ink);text-decoration:none;border-radius:8px;transition:color .15s,background .15s;cursor:pointer}
.menu-link:hover,.menu-item:hover>.menu-link{color:var(--nav-red);background:var(--nav-red-soft)}
.menu-link.active{color:var(--nav-red)}
.menu-arrow{width:10px;height:10px;transition:transform .2s}
.menu-item:hover>.menu-link .menu-arrow{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:240px;background:#fff;border:1px solid var(--nav-line);border-radius:12px;box-shadow:0 12px 32px rgba(36,26,18,.1);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .18s,transform .18s,visibility .18s;list-style:none;margin:0}
.menu-item:hover>.dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown li a{display:block;padding:10px 14px;font-size:14px;font-weight:500;color:var(--nav-ink);text-decoration:none;border-radius:8px;transition:background .12s,color .12s;white-space:nowrap}
.dropdown li a:hover{background:var(--nav-red-soft);color:var(--nav-red)}
.dropdown.products{min-width:260px;max-height:480px;overflow-y:auto}
.cta-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--nav-red);color:#fff;font-size:14px;font-weight:700;text-decoration:none;border-radius:100px;transition:background .15s,transform .15s,box-shadow .15s;box-shadow:0 4px 14px rgba(216,64,42,.25)}
.cta-btn:hover{background:var(--nav-red-deep);transform:translateY(-1px);box-shadow:0 6px 20px rgba(216,64,42,.35)}
.cta-btn svg{width:16px;height:16px}
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.hamburger span{display:block;width:24px;height:2px;background:var(--nav-ink);border-radius:1px;transition:.2s}
@media (max-width:1024px){
  .menu{gap:0}
  .menu-link{padding:8px 10px;font-size:13px}
  .top-bar-left{gap:14px;font-size:11px}
  .top-bar-inner{padding:0 30px}
  .main-nav-inner{padding:0 30px}
}
@media (max-width:768px){
  .top-bar-inner{flex-direction:column;gap:6px}
  .top-bar-left{flex-wrap:wrap;justify-content:center}
  .menu{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--nav-line);flex-direction:column;padding:12px 24px 24px;gap:0;box-shadow:0 8px 24px rgba(36,26,18,.08)}
  .menu.open{display:flex}
  .menu-item{width:100%}
  .menu-link{width:100%;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--nav-line);border-radius:0}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding-left:16px;display:none}
  .menu-item.open>.dropdown{display:block}
  .hamburger{display:flex}
  .cta-btn{padding:10px 18px;font-size:12px}
  .main-nav-inner{height:60px}
  .logo img{height:32px}
}

/* ======= 页面主体 ======= */
.faq-hero{background:var(--nav-ink);color:#fff;padding:64px 24px 56px;text-align:center}
.faq-hero h1{margin:0;font-size:clamp(28px,4.4vw,42px);font-weight:800;letter-spacing:-.5px;line-height:1.15}
.faq-hero p{margin:14px auto 0;max-width:640px;color:#e8ddd3;font-size:16px;line-height:1.7}
.faq-wrap{max-width:880px;margin:0 auto;padding:48px 24px 88px}

/* 搜索框 */
.search-box{position:relative;margin:0 0 32px}
.search-box svg{position:absolute;left:18px;top:50%;transform:translateY(-50%);width:20px;height:20px;stroke:var(--nav-red);stroke-width:2.2;fill:none;stroke-linecap:round;pointer-events:none}
.search-box input{width:100%;padding:16px 20px 16px 52px;font-size:16px;color:#222833;background:#fff;border:1.5px solid var(--nav-line);border-radius:12px;transition:border-color .15s,box-shadow .15s;-webkit-appearance:none;appearance:none}
.search-box input::placeholder{color:#9aa7b3}
.search-box input:focus{outline:none;border-color:var(--nav-red);box-shadow:0 0 0 4px rgba(216,64,42,.12)}

/* 分类标签 */
.cats{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.cat{border:1px solid var(--nav-line);background:#fff;color:var(--nav-ink-2);font-size:14px;padding:7px 16px;border-radius:999px;cursor:pointer;transition:all .15s;user-select:none;font-family:inherit}
.cat:hover{border-color:var(--nav-red);color:var(--nav-red)}
.cat.on{background:var(--nav-red);border-color:var(--nav-red);color:#fff;font-weight:600}

/* 问题列表 */
.count-note{font-size:14px;color:var(--nav-ink-2);margin-bottom:16px}
.count-note b{color:var(--nav-ink)}
.faq{list-style:none;margin:0;padding:0}
.faq-item{border-bottom:1px solid var(--nav-line)}
.faq-q{display:flex;align-items:center;gap:14px;width:100%;padding:20px 8px;background:none;border:none;text-align:left;cursor:pointer;font-family:inherit;font-size:17px;font-weight:600;color:var(--nav-red);line-height:1.4;transition:color .15s;-webkit-tap-highlight-color:transparent}
.faq-q:hover{color:var(--nav-red-deep)}
.faq-q .idx{flex:none;width:30px;height:30px;border-radius:8px;background:var(--nav-red-soft);border:1px solid var(--nav-line);color:var(--nav-red);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all .15s}
.faq-item.open .faq-q .idx{background:var(--nav-red);border-color:var(--nav-red);color:#fff}
.faq-q .qtext{flex:1}
.chev{flex:none;width:14px;height:14px;border-right:2px solid var(--nav-ink-2);border-bottom:2px solid var(--nav-ink-2);transform:rotate(45deg);transition:transform .2s;margin-top:-4px}
.faq-item.open .chev{transform:rotate(-135deg);margin-top:4px}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .25s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{margin:0;padding:0 8px 22px 52px;color:#3a3a3a;font-size:15.5px;line-height:1.75;max-width:72ch}
.faq-a-inner p + p{margin-top:10px}
.empty{display:none;text-align:center;padding:70px 20px;color:var(--nav-ink-2)}
.empty svg{width:44px;height:44px;stroke:var(--nav-line);stroke-width:1.6;fill:none;margin-bottom:14px}
.empty h3{font-size:18px;color:var(--nav-ink);margin-bottom:6px}

/* 底部 CTA */
.faq-cta{text-align:center;background:var(--nav-red-soft);border-radius:16px;padding:40px 24px;margin-top:48px}
.faq-cta h2{margin:0 0 8px;font-size:24px;color:var(--nav-ink)}
.faq-cta p{margin:0 0 20px;color:var(--nav-ink-2);font-size:15px}
.faq-cta a{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;background:var(--nav-red);color:#fff;font-size:14px;font-weight:700;border-radius:100px;transition:background .15s,transform .15s}
.faq-cta a:hover{background:var(--nav-red-deep);transform:translateY(-1px)}

/* ======= 页脚（与 index.html 统一） ======= */
.site-footer{background:#f7f8fa;overflow:hidden}
.footer-inner{max-width:1200px;margin:0 auto;padding:64px 24px 28px;display:flex;flex-direction:column;gap:36px}
.footer-top img{width:145px;height:40px;object-fit:contain}
.footer-columns{display:grid;grid-template-columns:160px 160px 140px 304px 300px;justify-content:space-between;align-items:start;gap:24px}
.footer-list{display:flex;flex-direction:column;gap:13px}
.footer-list h3,.inquiry-form h3{margin:0;color:#1f2530;font-size:13px;line-height:18px;font-weight:700}
.footer-list a,.footer-list p{margin:0;color:#7a8493;font-size:12px;line-height:17px}
.inquiry-form{display:flex;flex-direction:column;gap:12px}
.inquiry-form input,.inquiry-form textarea{width:100%;border:1px solid #e1e5ec;border-radius:0;padding:12px 16px;background:#fff;color:#222833;font-size:12px;line-height:16px;outline:none}
.inquiry-form input{height:40px}
.inquiry-form textarea{height:88px;resize:none}
.inquiry-form input::placeholder,.inquiry-form textarea::placeholder{color:#a0a8b4}
.inquiry-form button{width:100%;border:0;cursor:pointer}
.footer-rule{width:100%;height:1px;background:#e4e8ef}
.copyright{margin:0;color:#9aa3ae;font-size:11px;line-height:16px;text-align:center}

@media (max-width:1100px){
  .footer-columns{grid-template-columns:repeat(3,1fr);row-gap:28px}
}
@media (max-width:760px){
  .footer-columns{grid-template-columns:repeat(2,1fr)}
  .footer-contacts{grid-column:1/-1}
}
@media (max-width:560px){
  .faq-wrap{padding:36px 18px 64px}
  .cats{gap:8px;margin-bottom:24px}
  .cat{min-height:44px;display:inline-flex;align-items:center;padding:8px 16px}
  .faq-q{font-size:16px;padding:18px 4px}
  .faq-a-inner p{padding-left:0}
  .footer-columns{grid-template-columns:1fr}
  .footer-contacts{grid-column:auto}
}