/* ==========================================================================
   cozunet.com · 建材案例页 css/pages/case-jiancai.css
   版式：通栏大图 hero → 左文右卡概览 → 三列问题卡痛点
         → 左右交替设计 → 大数字横列实现 → 纸底 2x2 成果 → 三卡更多
   ========================================================================== */

/* ---------- 通栏 hero ---------- */
.jc-hero{position:relative;min-height:64vh;display:flex;align-items:flex-end;overflow:hidden}
.jc-hero-media{position:absolute;inset:0}
.jc-hero-media img{width:100%;height:100%;object-fit:cover}
.jc-hero-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(52,40,28,.3) 0%,rgba(52,40,28,.15) 45%,rgba(52,40,28,.85) 100%)}
.jc-hero-in{position:relative;z-index:2;padding:120px 0 46px}
.jc-hero .crumb a{color:rgba(255,255,255,.72)}
.jc-hero .crumb .now{color:rgba(255,255,255,.92)}
.jc-hero .crumb i{color:rgba(255,255,255,.4)}
.jc-hero .sec-eyebrow{color:rgba(255,255,255,.78)}
.jc-hero .sec-eyebrow::before{background:rgba(255,255,255,.5)}
.jc-hero h1{color:#fff;font-size:clamp(26px,3.8vw,44px);margin:14px 0 12px;max-width:760px}
.jc-hero-desc{color:rgba(255,255,255,.82);font-size:15px;max-width:620px;line-height:1.9}

/* ---------- 概览左文右卡 ---------- */
.jc-overview{padding:80px 0 70px;background:var(--paper)}
.jc-ov-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start}
.jc-ov-copy h2{margin:14px 0 18px}
.jc-ov-copy p{color:var(--ink-2);font-size:15px;line-height:2.05;margin-bottom:14px}
.jc-ov-card{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:12px 30px;box-shadow:var(--shadow-sm)}
.jc-ov-card div{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px dashed var(--line-2)}
.jc-ov-card div:last-child{border-bottom:0}
.jc-ov-card dt{font-size:13px;color:var(--muted);flex:none;padding-top:3px}
.jc-ov-card dd{font-size:14.5px;font-weight:500;text-align:right}
@media (max-width:880px){.jc-ov-grid{grid-template-columns:1fr;gap:32px}}

/* ---------- 痛点三列卡 ---------- */
.jc-pain{padding:80px 0;background:var(--card);border-top:1px solid var(--line-2)}
.jc-pain-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.jc-pain-cards > div{background:var(--paper);border:1px solid var(--line-2);border-radius:var(--r);padding:32px 28px}
.jc-p-num{display:inline-block;font-family:var(--font-serif);font-size:15px;color:#fff;background:var(--brown);border-radius:8px;padding:6px 14px;margin-bottom:20px}
.jc-pain-cards h3{font-size:18px;margin-bottom:10px}
.jc-pain-cards p{font-size:13.5px;color:var(--ink-2);line-height:1.95}
@media (max-width:900px){.jc-pain-cards{grid-template-columns:1fr}}

/* ---------- 设计交替 ---------- */
.jc-design{padding:90px 0;background:var(--paper)}
.jc-d-row{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;margin-bottom:64px}
.jc-d-row:last-child{margin-bottom:0}
.jc-d-rev .jc-d-row-media,.jc-d-rev figure{order:2}
.jc-d-row figure{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm)}
.jc-d-row img{width:100%;height:300px;object-fit:cover}
.jc-d-row h3{font-size:20px;margin-bottom:12px}
.jc-d-row p{font-size:14.5px;color:var(--ink-2);line-height:2}
@media (max-width:860px){.jc-d-row{grid-template-columns:1fr;gap:22px}.jc-d-rev figure{order:0}}

/* ---------- 实现大数字行 ---------- */
.jc-impl{padding:90px 0;background:var(--card);border-top:1px solid var(--line-2)}
.jc-impl-rows{display:grid;gap:8px;max-width:900px}
.jc-impl-rows > div{display:grid;grid-template-columns:160px 1fr;gap:30px;align-items:center;padding:26px 0;border-bottom:1px solid var(--line-2)}
.jc-impl-rows > div:last-child{border-bottom:0}
.jc-impl-rows b{font-family:var(--font-serif);font-size:clamp(30px,3.4vw,44px);color:var(--brown);line-height:1}
.jc-impl-rows b em{font-style:normal;font-size:.4em;color:var(--brown-soft);margin-left:3px}
.jc-impl-rows h3{font-size:17px;margin-bottom:6px}
.jc-impl-rows p{font-size:13.5px;color:var(--ink-2);line-height:1.9}
@media (max-width:720px){.jc-impl-rows > div{grid-template-columns:110px 1fr;gap:18px}}

/* ---------- 成果纸底 2x2 ---------- */
.jc-result{padding:80px 0;background:var(--paper)}
.jc-res-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px;max-width:860px}
.jc-res-grid div{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);padding:30px 28px}
.jc-res-grid b{font-family:var(--font-serif);font-size:clamp(30px,3.4vw,44px);color:var(--brown);display:block;line-height:1.1}
.jc-res-grid b em{font-style:normal;font-size:.4em;color:var(--brown-soft);margin-left:3px}
.jc-res-grid span{display:block;margin-top:10px;font-size:13.5px;color:var(--ink-2)}
@media (max-width:640px){.jc-res-grid{grid-template-columns:1fr}}

/* ---------- 更多三卡 ---------- */
.jc-more{padding:70px 0 40px;background:var(--paper)}
.jc-more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.jc-more-grid > a{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);overflow:hidden;transition:transform .45s var(--ease),box-shadow .45s var(--ease)}
.jc-more-grid > a:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.jc-more-grid img{width:100%;height:180px;object-fit:cover}
.jc-more-body{padding:18px 20px 22px}
.jc-more-body h3{font-size:16px;margin-top:10px}
@media (max-width:820px){.jc-more-grid{grid-template-columns:1fr}}

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

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

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

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