/* ============================================================
   industry-auto.css —— 汽车汽配建站页专属样式
   布局：右对齐 Hero / 三卡痛点 / 交错图文方案 / 横向图标链 /
   图文案例 / 手风琴 FAQ / CTA
   ============================================================ */

/* ---------- 1. Hero ---------- */
.au-hero{position:relative;min-height:92vh;display:flex;align-items:center;overflow:hidden;background:var(--ink)}
.au-hero-bg{background-position:center 32%}
.au-hero-veil{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(260deg,rgba(20,20,20,.88) 0%,rgba(20,20,20,.62) 55%,rgba(20,20,20,.32) 100%),
    linear-gradient(0deg,rgba(20,20,20,.5),transparent 45%);
}
.au-hero-inner{position:relative;z-index:3;padding-top:120px;margin-left:auto;text-align:right;max-width:900px}
.au-eyebrow{display:inline-block;padding:8px 22px;border-radius:100px;background:rgba(201,168,124,.14);border:1px solid rgba(201,168,124,.5);color:var(--coffee-bright);font-size:13px;font-weight:700;letter-spacing:.14em;margin-bottom:26px}
.au-hero-title{color:#fff;font-size:clamp(36px,5.6vw,64px);font-weight:900;line-height:1.14;letter-spacing:-.02em;margin-bottom:22px}
.au-gold{color:var(--coffee);position:relative;white-space:nowrap}
.au-gold::after{content:"";position:absolute;left:0;right:0;bottom:.05em;height:.12em;background:linear-gradient(90deg,transparent,var(--coffee));border-radius:2px}
.au-hero-sub{color:#D8CFBF;font-size:clamp(15px,1.7vw,18px);line-height:1.9;margin-bottom:34px;max-width:620px;margin-left:auto}
.au-hero-cta{display:flex;justify-content:flex-end;gap:16px;flex-wrap:wrap}
@media (max-width:640px){.au-hero-cta{justify-content:center}.au-hero-cta .btn{width:100%}}

/* ---------- 2. 三卡痛点 ---------- */
.au-pain{background:var(--coffee-bg)}
.au-pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.au-pain-card{background:#fff;border-radius:20px;padding:34px 28px;box-shadow:var(--shadow-sm);transition:all .4s;border-bottom:4px solid var(--coffee)}
.au-pain-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.au-pain-card h3{font-size:19px;margin-bottom:10px}
.au-pain-card p{font-size:14.5px;color:var(--text-2);line-height:1.85}
@media (max-width:900px){.au-pain-grid{grid-template-columns:1fr}}

/* ---------- 3. 交错图文方案 ---------- */
.au-plan{background:#fff}
.au-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.au-row:nth-child(even) .au-row-media{order:2}
.au-row-media img{border-radius:22px;box-shadow:var(--shadow-lg);width:100%}
.au-row-text .sec-title{font-size:clamp(26px,3.4vw,38px)}
.au-row-text>p{color:var(--text-2);line-height:1.9;margin:16px 0 22px}
.au-check{display:flex;flex-direction:column;gap:12px}
.au-check li{position:relative;padding-left:32px;font-size:15px;color:var(--text)}
.au-check li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--grad-coffee);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
@media (max-width:900px){.au-row{grid-template-columns:1fr;gap:32px}}

/* ---------- 4. 横向图标链 ---------- */
.au-mod{background:var(--coffee-bg)}
.au-mod-chain{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:40px}
.au-mod{background:#fff;border-radius:18px;padding:30px 22px;text-align:center;box-shadow:var(--shadow-sm);transition:all .4s}
.au-mod:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.au-mod svg{width:38px;height:38px;color:var(--coffee-deep);margin-bottom:14px}
.au-mod h3{font-size:16px;margin-bottom:6px}
.au-mod p{font-size:13.5px;color:var(--text-2)}
@media (max-width:900px){.au-mod-chain{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.au-mod-chain{grid-template-columns:1fr}}

/* ---------- 5. 图文案例 ---------- */
.au-case{background:#fff}
.au-case-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center}
.au-case-media img{border-radius:22px;box-shadow:var(--shadow-lg);width:100%}
.au-case-text .sec-title{font-size:clamp(26px,3.4vw,38px)}
.au-case-text>p{color:var(--text-2);line-height:1.9;margin-bottom:24px}
.au-sib{margin-top:22px;font-size:14px;color:var(--text-2)}
.au-sib a{color:var(--coffee-deep);font-weight:700;margin:0 6px}
@media (max-width:900px){.au-case-inner{grid-template-columns:1fr;gap:36px}}

/* ---------- 6. 手风琴 FAQ ---------- */
.au-faq{background:var(--coffee-bg)}
.au-acc{max-width:860px;margin:0 auto}
.acc-item{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:14px;overflow:hidden;transition:box-shadow .3s,border-color .3s}
.acc-item.open{box-shadow:var(--shadow-md);border-color:var(--coffee)}
.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;cursor:pointer;font-weight:800;font-size:16px;color:var(--ink);text-align:left;background:none}
.acc-ico{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--coffee-bg);color:var(--coffee-deep);display:flex;align-items:center;justify-content:center;transition:all .3s}
.acc-ico svg{width:15px;height:15px;transition:transform .3s}
.acc-item.open .acc-ico{background:var(--grad-coffee);color:#fff}
.acc-item.open .acc-ico svg{transform:rotate(45deg)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc-panel p{padding:0 24px 22px;color:var(--text-2);font-size:14.5px;line-height:1.9}
.acc-panel a{color:var(--coffee-deep);font-weight:700;text-decoration:underline}

/* ---------- 7. CTA ---------- */
.au-cta{position:relative;overflow:hidden;background:var(--ink);padding:120px 0}
.au-cta-bg{background-position:center 40%}
.au-cta-veil{position:absolute;inset:0;background:rgba(20,20,20,.8);z-index:1}
.au-cta-inner{position:relative;z-index:2;text-align:center}
.au-cta-title{color:#fff;font-size:clamp(26px,4vw,42px);font-weight:900;margin-bottom:16px}
.au-cta-sub{color:#D8CFBF;font-size:16px;margin-bottom:36px}
.au-cta-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media (max-width:640px){.au-cta-row .btn{width:100%}}