:root{
  /* 中性色 */
  --ink:#0f172a; --ink2:#334155; --ink3:#64748b; --ink4:#94a3b8;
  --bg:#f6f8fb; --card:#fff; --line:#e6eaf0; --line2:#d5dbe4;
  /* 主色 */
  --blue:#2563eb; --blue-d:#1d4ed8; --blue-bg:#eff5ff;
  --green:#067a5c; --green-bg:#e8f7f1;
  --amber:#b45309; --amber-bg:#fdf5e7;
  --red:#c0362c; --red-bg:#fdeeed;
  --gray-bg:#f1f5f9;
  /* 形状 */
  --r:14px; --r-sm:10px;
  --sh:0 1px 2px rgba(15,23,42,.04), 0 1px 3px rgba(15,23,42,.06);
  --sh-md:0 2px 4px rgba(15,23,42,.04), 0 8px 20px rgba(15,23,42,.07);
  --sh-lg:0 4px 8px rgba(15,23,42,.05), 0 16px 40px rgba(15,23,42,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--ink); font-size:15px; line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* ================= 顶部 ================= */
.site-head{
  background:rgba(255,255,255,.88); backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line); position:sticky; top:0; z-index:50;
}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{font-size:17px;font-weight:650;color:var(--ink);display:flex;align-items:center;gap:10px;white-space:nowrap;letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand .dot{
  width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2563eb,#0ea5e9);color:#fff;
}
.brand .dot svg{width:17px;height:17px;fill:currentColor}
.site-nav{display:flex;gap:4px;font-size:14.5px}
.site-nav a{color:var(--ink2);padding:7px 13px;border-radius:8px;transition:.15s}
.site-nav a:hover{background:var(--gray-bg);color:var(--ink);text-decoration:none}
.site-nav a.on{color:var(--blue);background:var(--blue-bg);font-weight:600}

/* ================= Hero ================= */
.hero{padding:56px 0 40px;text-align:center}
.hero .badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink2);
  background:var(--card);border:1px solid var(--line);border-radius:999px;padding:5px 14px;margin-bottom:20px;
  box-shadow:var(--sh);
}
.hero h1{font-size:40px;font-weight:700;line-height:1.25;letter-spacing:-.02em;margin-bottom:14px}
.hero h1 .hl{color:var(--blue)}
.hero p.lede{font-size:17px;color:var(--ink2);max-width:600px;margin:0 auto;line-height:1.8}
.hero-sm{padding:34px 0 22px;text-align:left}
.hero-sm h1{font-size:28px}

/* ================= 查询器 ================= */
.picker{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:22px;margin:30px 0 0;box-shadow:var(--sh-md);
}
.picker-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.picker label{display:block;font-size:12px;color:var(--ink3);margin-bottom:6px;font-weight:600;letter-spacing:.02em}
.picker select,.picker input{
  width:100%;padding:11px 13px;font-size:15px;border:1px solid var(--line2);
  border-radius:var(--r-sm);background:var(--card);color:var(--ink);font-family:inherit;
  transition:.15s;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%2364748b' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:34px;
}
.picker input{background-image:none;padding-right:13px}
.picker select:focus,.picker input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.picker select:disabled{background-color:var(--gray-bg);color:var(--ink4)}
.picker-actions{text-align:center;margin-top:18px}
.picker-hint{font-size:13px;color:var(--ink3);margin-top:14px;text-align:center}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  font-family:inherit;font-size:15px;font-weight:600;padding:11px 22px;
  border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;transition:.15s;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 1px 2px rgba(37,99,235,.3)}
.btn-primary:hover{background:var(--blue-d)}
.btn-ghost{background:var(--card);border-color:var(--line2);color:var(--ink2)}
.btn-ghost:hover{border-color:var(--ink4);color:var(--ink)}
#btn-go:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}

/* ================= 品牌图标 ================= */
.bicon{display:inline-block;vertical-align:middle;flex-shrink:0;object-fit:contain}
.bicon-text{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;font-weight:700;font-size:11px;letter-spacing:.02em;
  background:color-mix(in srgb, var(--bc) 12%, #fff);
  color:var(--bc);
}
@supports not (background: color-mix(in srgb, red 10%, blue)){
  .bicon-text{background:var(--gray-bg);color:var(--ink2)}
}
.bicon-xl{width:56px;height:56px}

/* ================= 区块 ================= */
section{padding:38px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.sec-head h2{font-size:21px;font-weight:650;letter-spacing:-.01em}
.sec-head .more{font-size:13.5px;color:var(--ink3)}
.sec-head .more:hover{color:var(--blue)}

/* ================= 卡片 ================= */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;transition:.18s;display:block;
}
a.card:hover{border-color:var(--line2);box-shadow:var(--sh-md);text-decoration:none;transform:translateY(-1px)}
.card .ct{font-weight:650;font-size:15.5px;margin-bottom:7px;color:var(--ink);line-height:1.5}
.card .cd{font-size:13.5px;color:var(--ink2);line-height:1.7}
.card .tag{
  display:inline-block;font-size:11px;background:var(--gray-bg);color:var(--ink3);
  border-radius:5px;padding:2px 8px;margin-bottom:9px;font-weight:600;
}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* 品牌卡片 */
.brand-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 14px;text-align:center;transition:.18s;display:block;position:relative;overflow:hidden;
}
.brand-card::before{
  content:'';position:absolute;inset:0 0 auto 0;height:3px;background:var(--bc,var(--blue));opacity:.85;
}
.brand-card:hover{border-color:var(--line2);box-shadow:var(--sh-md);text-decoration:none;transform:translateY(-2px)}
.brand-card .bi{height:44px;display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.brand-card .bn{font-size:15px;font-weight:650;color:var(--ink)}
.brand-card .bc2{font-size:12px;color:var(--ink3);margin-top:1px}
.brand-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}

/* ================= 诊断卡 ================= */
.diag{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh)}
.rc-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.rc-title{font-size:24px;font-weight:700;letter-spacing:-.015em;display:flex;align-items:center;gap:10px}
.rc-sub{font-size:13.5px;color:var(--ink3);margin-top:4px}
.pill{font-size:12px;padding:4px 11px;border-radius:999px;font-weight:600;white-space:nowrap;display:inline-block}
.pill.ok{background:var(--green-bg);color:var(--green)}
.pill.warn{background:var(--amber-bg);color:var(--amber)}
.pill.info{background:var(--blue-bg);color:var(--blue)}

.verdict{
  background:linear-gradient(180deg,#e8f7f1,#f2fbf8);border:1px solid #c6e9dd;
  border-radius:var(--r-sm);padding:15px 17px;font-size:14.5px;color:#0a5c46;margin-bottom:18px;
}
.verdict strong{color:#06452f}

.rc-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-bottom:13px}
.rc-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-sm);padding:15px 17px}
.rc-box.full{grid-column:1/-1;margin-bottom:13px}
.rc-box h4{font-size:12px;color:var(--ink3);font-weight:700;margin-bottom:8px;letter-spacing:.04em}
.rc-box p{font-size:14px;color:var(--ink2);margin:0}
.rc-box .note{font-size:13px;color:var(--ink3);margin-top:6px}

.conn-list{display:grid;gap:8px}
.conn{
  display:flex;align-items:center;gap:12px;padding:11px 14px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);
}
.conn .cn{font-weight:650;font-size:14px;min-width:78px}
.conn .cd{font-size:13px;color:var(--ink2);flex:1}
.conn .cs{font-size:11px;padding:3px 9px;border-radius:6px;font-weight:700;white-space:nowrap}
.cs-native{background:var(--green-bg);color:var(--green)}
.cs-box{background:var(--blue-bg);color:var(--blue)}
.cs-no{background:var(--gray-bg);color:var(--ink3)}
.cs-tbd{background:var(--amber-bg);color:var(--amber)}

.issue-list{margin:0;padding-left:19px}
.issue-list li{font-size:14px;color:var(--ink2);margin-bottom:6px}
.issue-list li::marker{color:var(--ink4)}

.part-list{display:grid;gap:8px}
.part{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);
}
a.part:hover{border-color:var(--blue);background:var(--blue-bg);text-decoration:none}
.part .pn{font-weight:650;font-size:14px}
.part .pd{font-size:12.5px;color:var(--ink3);margin-top:2px}
.part .pp{font-size:14.5px;font-weight:700;color:var(--amber);white-space:nowrap}

.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}

/* 年款切换 */
.year-tabs{display:flex;gap:8px;flex-wrap:wrap}
.year-tab{
  border:1px solid var(--line2);border-radius:var(--r-sm);padding:7px 16px;
  font-size:14px;color:var(--ink2);background:var(--card);transition:.15s;
}
.year-tab:hover{border-color:var(--blue);color:var(--blue);text-decoration:none}
.year-tab.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}

.year-block{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:14px;scroll-margin-top:76px;box-shadow:var(--sh)}
.yb-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.yb-head h2{font-size:19px;font-weight:650;display:flex;align-items:center;gap:9px}

/* ================= 车型索引 ================= */
.index-block{padding:18px 0;border-bottom:1px solid var(--line)}
.index-block:last-child{border-bottom:none}
.index-brand{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.index-brand a{font-weight:650;font-size:15.5px;display:flex;align-items:center;gap:8px}
.index-brand a:hover{color:var(--blue);text-decoration:none}
.index-brand span{font-size:13px;color:var(--ink3);flex:1;min-width:180px}
.index-models{display:flex;gap:8px;flex-wrap:wrap}
.index-models a{
  font-size:13.5px;color:var(--ink2);border:1px solid var(--line);border-radius:999px;
  padding:5px 14px;background:var(--card);transition:.15s;
}
.index-models a:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-bg);text-decoration:none}

/* ================= 文章 ================= */
.article{max-width:760px}
.article h1{font-size:32px;font-weight:700;line-height:1.35;letter-spacing:-.015em;margin-bottom:12px}
.article .meta{
  font-size:13px;color:var(--ink3);margin-bottom:26px;padding-bottom:20px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.article h2{font-size:21px;font-weight:650;margin:32px 0 12px;letter-spacing:-.01em}
.article h3{font-size:17.5px;font-weight:650;margin:26px 0 10px}
.article p{margin-bottom:16px;color:var(--ink2);font-size:16px;line-height:1.85}
.article ul,.article ol{margin:0 0 18px 22px}
.article li{margin-bottom:8px;color:var(--ink2);font-size:16px;line-height:1.8}
.article blockquote{
  border-left:3px solid var(--blue);background:var(--blue-bg);padding:12px 18px;margin:0 0 18px;
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--ink2);
}
.article img{border-radius:var(--r-sm);margin:18px 0;display:block}
.article a{text-decoration:underline;text-underline-offset:2px}
.article code{background:var(--gray-bg);padding:2px 6px;border-radius:4px;font-size:14px}
.article hr{border:none;border-top:1px solid var(--line);margin:28px 0}
.article .lead{
  font-size:17px;color:var(--ink2);border-left:3px solid var(--blue);
  padding-left:16px;margin-bottom:24px;line-height:1.8;
}

.breadcrumb{font-size:13.5px;color:var(--ink3);margin-bottom:18px}
.breadcrumb a{color:var(--ink3)}
.breadcrumb a:hover{color:var(--blue)}

.faq{margin-top:36px;border-top:1px solid var(--line);padding-top:26px}
.faq h3{margin-top:0}
.faq details{
  border:1px solid var(--line);border-radius:var(--r-sm);padding:14px 18px;margin-bottom:9px;
  background:var(--card);transition:.15s;
}
.faq details[open]{border-color:var(--line2);box-shadow:var(--sh)}
.faq summary{font-weight:650;font-size:15px;cursor:pointer;list-style:none;display:flex;align-items:center;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:'+';color:var(--blue);font-weight:700;font-size:16px;
  width:20px;height:20px;border-radius:50%;background:var(--blue-bg);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.faq details[open] summary::before{content:'−'}
.faq details p{margin:12px 0 0;font-size:14.5px;color:var(--ink2)}

.hook{
  background:linear-gradient(135deg,#fdf5e7,#fefaf2);border:1px solid #f0dfc0;
  border-radius:var(--r);padding:22px 24px;margin-top:36px;
}
.hook .ht{font-weight:700;color:var(--amber);margin-bottom:6px;font-size:16px}
.hook .hd{font-size:14px;color:#8a5a12;margin-bottom:16px}

/* 列表项 */
.list-item{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 0;border-bottom:1px solid var(--line);
}
.list-item:last-child{border-bottom:none}
a.list-item:hover{text-decoration:none}
a.list-item:hover .lt{color:var(--blue)}
.list-item .lt{font-weight:650;font-size:16px;color:var(--ink);line-height:1.5;transition:.15s}
.list-item .ld{font-size:13.5px;color:var(--ink2);margin-top:4px}
.list-item .arrow{color:var(--ink4);font-size:20px;flex-shrink:0;line-height:1.5}

/* ================= 网盘横幅 ================= */
.drive-band{
  background:linear-gradient(135deg,#1e3a8a,#2563eb);color:#fff;padding:30px 0;margin-top:44px;
}
.drive-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.drive-inner .dt{font-size:19px;font-weight:700}
.drive-inner .dd{font-size:14px;opacity:.85;margin-top:4px}
.drive-inner .btn-primary{background:#fff;color:var(--blue-d);box-shadow:none}
.drive-inner .btn-primary:hover{background:#f1f5f9}

/* ================= 页脚 ================= */
.site-foot{border-top:1px solid var(--line);padding:34px 0 48px;font-size:13.5px;color:var(--ink3);background:var(--card)}
.site-foot .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.site-foot a{color:var(--ink3)}
.site-foot a:hover{color:var(--blue)}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.disclaimer{
  background:var(--gray-bg);border-radius:var(--r-sm);padding:13px 17px;
  font-size:12.5px;color:var(--ink3);margin-top:16px;line-height:1.75;max-width:560px;
}

/* ================= 轮播 ================= */
.slides{position:relative;margin:0 0 4px}
.sl-viewport{overflow:hidden;border-radius:var(--r);box-shadow:var(--sh-md)}
.sl-track{display:flex;transition:transform .45s cubic-bezier(.4,0,.2,1);will-change:transform}
.sl-item{
  flex:0 0 100%;min-height:210px;position:relative;display:flex;align-items:center;
  background-color:var(--sb);
  background-image:linear-gradient(120deg, rgba(255,255,255,.14), rgba(0,0,0,.22));
  overflow:hidden;
}
.sl-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32}
.sl-body{position:relative;padding:28px 34px;max-width:72%;color:#fff}
.sl-body h3{font-size:23px;font-weight:700;line-height:1.35;margin-bottom:8px;letter-spacing:-.01em}
.sl-body p{font-size:14.5px;opacity:.92;margin-bottom:16px;line-height:1.7}
.sl-btn{
  display:inline-flex;align-items:center;gap:6px;background:#fff;color:var(--sb);
  font-size:14px;font-weight:650;padding:9px 18px;border-radius:999px;transition:.15s;
}
.sl-btn:hover{text-decoration:none;transform:translateX(2px)}

.sl-arrow{
  position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;
  border:none;border-radius:50%;background:rgba(255,255,255,.9);color:#0f172a;
  font-size:22px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;
  box-shadow:0 2px 8px rgba(0,0,0,.18);transition:.15s;z-index:2;font-family:inherit;
}
.sl-arrow:hover{background:#fff;transform:translateY(-50%) scale(1.06)}
.sl-prev{left:12px}
.sl-next{right:12px}

.sl-dots{position:absolute;left:0;right:0;bottom:14px;display:flex;justify-content:center;gap:7px;z-index:2}
.sl-dot{
  width:7px;height:7px;border-radius:50%;border:none;padding:0;cursor:pointer;
  background:rgba(255,255,255,.45);transition:.2s;
}
.sl-dot.on{background:#fff;width:20px;border-radius:4px}

/* ================= 站点 LOGO ================= */
.site-logo{height:30px;width:auto;max-width:150px;object-fit:contain;display:block}

/* ================= 页脚 ================= */
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:28px}
.foot-col h4{font-size:13px;font-weight:700;color:var(--ink);margin-bottom:12px;letter-spacing:.03em}
.foot-brand{
  display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;color:var(--ink);margin-bottom:10px;
}
.foot-brand:hover{text-decoration:none;color:var(--blue)}
.foot-brand .dot{
  width:26px;height:26px;border-radius:7px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2563eb,#0ea5e9);color:#fff;flex-shrink:0;
}
.foot-brand .dot svg{width:16px;height:16px;fill:currentColor}
.foot-desc{font-size:13px;color:var(--ink3);line-height:1.75;margin-bottom:12px;max-width:320px}
.foot-drive{font-size:13px;color:var(--blue);font-weight:600}
.foot-list{list-style:none;margin:0;padding:0}
.foot-list li{margin-bottom:8px}
.foot-list a{font-size:13.5px;color:var(--ink2)}
.foot-list a:hover{color:var(--blue)}
.foot-brands{display:grid;grid-template-columns:1fr 1fr;gap:4px 12px}
.foot-brands a{display:flex;align-items:center;gap:6px;font-size:13px}
.foot-col .disclaimer{margin-top:14px;max-width:none}
.foot-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--ink3);
}

/* ================= 响应式 ================= */
@media(max-width:1024px){
  .grid3{grid-template-columns:repeat(2,1fr)}
  .brand-grid{grid-template-columns:repeat(4,1fr)}
  .hero h1{font-size:34px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .sl-body{max-width:80%}
}
@media(max-width:760px){
  .wrap{padding:0 16px}
  .picker-row{grid-template-columns:1fr}
  .rc-grid{grid-template-columns:1fr}
  .grid3,.grid2{grid-template-columns:1fr}
  .brand-grid{grid-template-columns:repeat(3,1fr)}
  .hero{padding:36px 0 26px}
  .hero h1{font-size:27px}
  .hero p.lede{font-size:15.5px}
  .site-nav{display:none}
  .site-head .wrap{height:54px}
  .diag{padding:17px}
  .rc-title{font-size:20px}
  .conn{flex-wrap:wrap;gap:8px}
  .conn .cd{flex:1 1 100%;order:3}
  .conn .cs{order:2}
  .cta .btn{flex:1;min-width:150px}
  .drive-inner{flex-direction:column;align-items:flex-start}
  .drive-inner .btn{width:100%}
  .article h1{font-size:25px}
  .article p,.article li{font-size:15.5px}
  .index-brand{flex-direction:column;align-items:flex-start;gap:3px}
  .year-block{padding:17px}
  section{padding:28px 0}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .foot-brands{grid-template-columns:1fr 1fr 1fr}
  .sl-item{min-height:186px}
  .sl-body{padding:22px 22px;max-width:100%}
  .sl-body h3{font-size:19px}
  .sl-body p{font-size:13.5px;margin-bottom:13px}
  .sl-arrow{width:32px;height:32px;font-size:19px}
  .sl-prev{left:8px}
  .sl-next{right:8px}
  .foot-bottom{font-size:12.5px}
}
@media(max-width:420px){
  .brand-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:23px}
  .foot-links{gap:14px}
}