/* ==========================================================================
   cozunet.com · 化工案例页 css/pages/case-huagong.css
   版式：分屏 hero → 左文右卡概览 → 编号清单痛点
         → 左右交替设计 → 三列实现 → 纸底 2x2 成果 → 横条更多
   ========================================================================== */

/* ---------- 分屏 hero ---------- */
.hg-hero{padding:120px 0 0;background:var(--paper)}
.hg-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:end}
.hg-hero-copy h1{margin:14px 0 18px;font-size:clamp(28px,4vw,46px);max-width:640px}
.hg-hero-desc{color:var(--ink-2);font-size:15.5px;line-height:2;max-width:580px}
.hg-hero-media{border-radius:18px 18px 0 0;overflow:hidden;box-shadow:var(--shadow)}
.hg-hero-media img{width:100%;height:480px;object-fit:cover}
@media (max-width:900px){.hg-hero-grid{grid-template-columns:1fr}.hg-hero-media{border-radius:18px}.hg-hero-media img{height:320px}}

/* ---------- 概览左文右卡 ---------- */
.hg-overview{padding:80px 0;background:var(--paper)}
.hg-ov-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start}
.hg-ov-copy h2{margin:14px 0 18px}
.hg-ov-copy p{color:var(--ink-2);font-size:15px;line-height:2.05;margin-bottom:14px}
.hg-ov-card{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:12px 30px;box-shadow:var(--shadow-sm)}
.hg-ov-card div{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px dashed var(--line-2)}
.hg-ov-card div:last-child{border-bottom:0}
.hg-ov-card dt{font-size:13px;color:var(--muted);flex:none;padding-top:3px}
.hg-ov-card dd{font-size:14.5px;font-weight:500;text-align:right}
@media (max-width:880px){.hg-ov-grid{grid-template-columns:1fr;gap:32px}}

/* ---------- 痛点清单 ---------- */
.hg-pain{padding:80px 0;background:var(--card);border-top:1px solid var(--line-2)}
.hg-pain-list{max-width:900px;margin:0 auto}
.hg-pain-list li{display:grid;grid-template-columns:70px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line-2);align-items:start}
.hg-pain-list li:last-child{border-bottom:0}
.hg-no{font-family:var(--font-serif);font-size:30px;color:var(--brown-bg);font-weight:700;line-height:1}
.hg-pain-list h3{font-size:18px;margin-bottom:8px}
.hg-pain-list p{font-size:14px;color:var(--ink-2);line-height:1.95}

/* ---------- 设计交替 ---------- */
.hg-design{padding:90px 0;background:var(--paper)}
.hg-d-row{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;margin-bottom:56px}
.hg-d-row:last-child{margin-bottom:0}
.hg-d-row figure{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm)}
.hg-d-row img{width:100%;height:300px;object-fit:cover}
.hg-d-row h3{font-size:20px;margin-bottom:12px}
.hg-d-row p{font-size:14.5px;color:var(--ink-2);line-height:2}
@media (max-width:860px){.hg-d-row{grid-template-columns:1fr;gap:22px}.hg-d-rev figure{order:0}}

/* ---------- 实现三列 ---------- */
.hg-impl{padding:90px 0;background:var(--card);border-top:1px solid var(--line-2)}
.hg-impl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.hg-impl-grid > div{background:var(--paper);border:1px solid var(--line-2);border-radius:var(--r);padding:32px 28px}
.hg-impl-grid h3{font-size:18px;margin-bottom:10px}
.hg-impl-grid p{font-size:13.5px;color:var(--ink-2);line-height:1.95}
@media (max-width:900px){.hg-impl-grid{grid-template-columns:1fr}}

/* ---------- 成果 2x2 ---------- */
.hg-result{padding:80px 0;background:var(--paper)}
.hg-res-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;max-width:860px;margin-left:auto;margin-right:auto}
.hg-res-grid div{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:30px 28px;text-align:center}
.hg-res-grid b{font-family:var(--font-serif);font-size:clamp(30px,3.4vw,44px);color:var(--brown);display:block;line-height:1.1}
.hg-res-grid b em{font-style:normal;font-size:.4em;color:var(--brown-soft);margin-left:3px}
.hg-res-grid span{display:block;margin-top:10px;font-size:13.5px;color:var(--ink-2)}
@media (max-width:640px){.hg-res-grid{grid-template-columns:1fr}}

/* ---------- 更多横条 ---------- */
.hg-more{padding:90px 0 40px;background:var(--paper)}
.hg-more-rows{display:grid;gap:16px;max-width:960px;margin:0 auto}
.hg-more-rows a{display:grid;grid-template-columns:200px 1fr 36px;gap:22px;align-items:center;background:var(--card);border:1px solid var(--line-2);border-radius:14px;padding:14px;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.hg-more-rows a:hover{transform:translateX(6px);box-shadow:var(--shadow-sm)}
.hg-more-rows img{width:200px;height:130px;object-fit:cover;border-radius:10px}
.hg-more-rows h3{font-size:16.5px;margin:8px 0 5px}
.hg-more-rows p{font-size:13px;color:var(--ink-2)}
.hg-arrow{width:34px;height:34px;border-radius:50%;background:var(--brown-bg);color:var(--brown);display:flex;align-items:center;justify-content:center;justify-self:end}
.hg-arrow svg{width:14px;height:14px}
@media (max-width:720px){.hg-more-rows a{grid-template-columns:100px 1fr;gap:14px}.hg-more-rows img{width:100px;height:78px}.hg-arrow{display:none}}

/* ---------- CTA ---------- */
.hg-cta{background:var(--brown-deep);padding:72px 0;margin-top:50px}
.hg-cta-in{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.hg-cta-copy h2{color:#fff;font-size:clamp(23px,2.8vw,32px);margin-bottom:10px}
.hg-cta-copy p{color:rgba(255,255,255,.68);font-size:14.5px;letter-spacing:.05em}
.hg-cta-btns{display:flex;gap:16px;flex-wrap:wrap}

/* ---------- 客户常问 ---------- */
.hg-faq{padding:90px 0;background:var(--card);border-top:1px solid var(--line-2)}
.hg-faq-list{max-width:860px;margin:40px auto 0;display:grid;gap:14px}
.hg-faq details{background:var(--paper);border:1px solid var(--line-2);border-radius:12px;padding:20px 26px}
.hg-faq summary{font-size:15.5px;font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:28px}
.hg-faq summary::-webkit-details-marker{display:none}
.hg-faq summary::after{content:"+";position:absolute;right:0;top:0;font-size:20px;color:var(--brown-soft);line-height:1.2}
.hg-faq details[open] summary::after{content:"-"}
.hg-faq details p{margin-top:12px;font-size:14px;color:var(--ink-2);line-height:1.95}

/* ---------- 售后与维护 ---------- */
.hg-care{padding:80px 0;background:var(--paper);border-top:1px solid var(--line-2)}
.hg-care-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:40px}
.hg-care-grid > div{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:26px 24px}
.hg-care-grid h3{font-size:16px;margin-bottom:10px}
.hg-care-grid p{font-size:13px;color:var(--ink-2);line-height:1.9}
@media (max-width:900px){.hg-care-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.hg-care-grid{grid-template-columns:1fr}}

/* ---------- 客户反馈 ---------- */
.hg-quote{padding:80px 0;background:var(--card);border-top:1px solid var(--line-2)}
.hg-quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.hg-quote blockquote{background:var(--paper);border:1px solid var(--line-2);border-left:3px solid var(--brown);border-radius:12px;padding:28px 30px}
.hg-quote p{font-size:14.5px;line-height:2;color:var(--ink);margin-bottom:14px}
.hg-quote cite{font-size:12.5px;color:var(--muted);font-style:normal;letter-spacing:.05em}
@media (max-width:760px){.hg-quote-grid{grid-template-columns:1fr}}