/* ============================================================
   donkiz-ca.com 案例集锦分组样式 css/cases.css
   风格：保鲜膜极简风（透明白 + 浅灰 + 纯白）
   职责：cases.html 总览 + 12 个案例详情页（布局池轮换）
   说明：类名一律 cas- 前缀；不修改 base.css；无内联样式
   ============================================================ */

/* ---------- 0. 案例页 hero 公共 ---------- */
.cas-hero { position: relative; padding: 64px 0 60px; background: linear-gradient(180deg, var(--bg-faint) 0%, var(--white) 100%); overflow: hidden; }
.cas-crumbs-row { margin-bottom: 30px; }
.cas-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: .18em; font-weight: 600; color: var(--ink-3);
}
.cas-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--ink); }
.cas-h1 { font-size: clamp(28px, 3.8vw, 44px); margin: 16px 0 16px; letter-spacing: .01em; }
.cas-lead { font-size: 16px; color: var(--ink-3); max-width: 560px; }
.cas-hero-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }

/* hero 区显眼联系方式（共享顶栏之外的二次展示） */
.cas-hero-contact {
  margin-top: 30px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
}
.cas-hc {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 18px; border-radius: 999px; background: var(--white);
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  font-size: 14px; font-weight: 600; color: var(--ink);
}
.cas-hc svg { width: 16px; height: 16px; color: var(--ink-3); }
.cas-hc strong { font-size: 15px; letter-spacing: .02em; }

/* ---------- 1. 布局① 左右大图 + 编号需求（machinery） ---------- */
.cas-split { display: grid; grid-template-columns: 1.02fr 1fr; gap: 56px; align-items: center; }
.cas-split-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.cas-split-media img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }

/* 编号需求列表（①③④⑥⑦等共用） */
.cas-needs { counter-reset: casneed; margin-top: 8px; }
.cas-need {
  position: relative; display: grid; grid-template-columns: 56px 1fr; gap: 20px;
  padding: 26px 0; border-bottom: 1px solid var(--line);
}
.cas-need:last-child { border-bottom: none; }
.cas-need::before {
  counter-increment: casneed; content: "0" counter(casneed);
  font-size: 26px; font-weight: 700; color: var(--line-strong);
  font-variant-numeric: tabular-nums; letter-spacing: .02em;
}
.cas-need h3 { font-size: 17.5px; margin-bottom: 6px; }
.cas-need p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 2. 布局② 深色 hero + 方案三卡（food） ---------- */
.cas-hero-dark { background: var(--ink); color: #fff; }
.cas-hero-dark .cas-eyebrow { color: rgba(255,255,255,.55); }
.cas-hero-dark .cas-eyebrow::before { background: rgba(255,255,255,.7); }
.cas-hero-dark .cas-h1 { color: #fff; }
.cas-hero-dark .cas-lead { color: rgba(255,255,255,.68); }
.cas-hero-dark .chip { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18); color: rgba(255,255,255,.85); }
.cas-hero-dark .cas-hc { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); color: #fff; }
.cas-hero-dark .cas-hc svg { color: rgba(255,255,255,.6); }
.cas-hero-dark .crumbs a, .cas-hero-dark .crumbs { color: rgba(255,255,255,.55); }
.cas-dark-media { margin-top: 44px; border-radius: var(--radius); overflow: hidden; box-shadow: 0 30px 80px rgba(0,0,0,.45); }
.cas-dark-media img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }

/* 方案三卡（全部详情页共用） */
.cas-sol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cas-sol-card { padding: 32px 28px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.cas-sol-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.cas-sol-ico {
  width: 46px; height: 46px; border-radius: 12px; background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center; color: var(--ink);
  margin-bottom: 18px;
}
.cas-sol-ico svg { width: 22px; height: 22px; }
.cas-sol-card h3 { font-size: 18px; margin-bottom: 10px; }
.cas-sol-card p { font-size: 14.5px; color: var(--ink-3); }
.cas-sol-card ul { margin-top: 14px; }
.cas-sol-card li {
  position: relative; padding-left: 18px; font-size: 14px; color: var(--ink-2); margin-top: 8px;
}
.cas-sol-card li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }

/* ---------- 3. 布局③ 居中 hero + 页面设计时间轴（ecommerce） ---------- */
.cas-hero-center { text-align: center; }
.cas-hero-center .cas-eyebrow::after { content: ""; width: 26px; height: 2px; background: var(--ink); }
.cas-hero-center .cas-eyebrow { justify-content: center; }
.cas-hero-center .cas-lead { margin-inline: auto; }
.cas-hero-center .cas-hero-contact { justify-content: center; }
.cas-center-media { max-width: 980px; margin: 48px auto 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.cas-center-media img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }

/* 页面设计时间轴 */
.cas-timeline { position: relative; margin-top: 20px; }
.cas-timeline::before {
  content: ""; position: absolute; left: 21px; top: 8px; bottom: 8px;
  width: 2px; background: var(--line);
}
.cas-tl-item { position: relative; display: grid; grid-template-columns: 44px 1fr; gap: 26px; padding: 22px 0; }
.cas-tl-dot {
  width: 44px; height: 44px; border-radius: 50%; background: var(--white);
  border: 2px solid var(--ink); display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--ink); position: relative; z-index: 1;
}
.cas-tl-body { background: var(--bg-faint); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; }
.cas-tl-body h3 { font-size: 17.5px; margin-bottom: 8px; }
.cas-tl-body p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 4. 布局④ 全宽图带 + 效果数据表（medical） ---------- */
.cas-hero-band { padding: 0; }
.cas-band-img { position: relative; height: 46vh; min-height: 320px; overflow: hidden; }
.cas-band-img img { width: 100%; height: 100%; object-fit: cover; }
.cas-band-mask {
  position: absolute; inset: 0; background: linear-gradient(180deg, rgba(23,25,29,.35) 0%, rgba(23,25,29,.72) 100%);
  display: flex; align-items: flex-end;
}
.cas-band-mask .container { padding-bottom: 44px; }
.cas-band-mask .cas-eyebrow { color: rgba(255,255,255,.65); }
.cas-band-mask .cas-eyebrow::before { background: rgba(255,255,255,.8); }
.cas-band-mask h1 { color: #fff; font-size: clamp(28px, 3.8vw, 44px); margin: 14px 0 10px; }
.cas-band-mask p { color: rgba(255,255,255,.75); max-width: 560px; }
.cas-band-mask .crumbs a, .cas-band-mask .crumbs { color: rgba(255,255,255,.6); }
.cas-band-mask .crumbs a:hover { color: #fff; }

/* 效果数据表（④） */
.cas-mtable-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow-sm); }
.cas-mtable { width: 100%; border-collapse: collapse; min-width: 560px; }
.cas-mtable caption { text-align: left; padding: 18px 24px 0; font-size: 13.5px; color: var(--ink-3); }
.cas-mtable th, .cas-mtable td { padding: 16px 24px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.cas-mtable thead th { background: var(--bg-soft); color: var(--ink); font-size: 13.5px; letter-spacing: .04em; }
.cas-mtable tbody tr:last-child td { border-bottom: none; }
.cas-mtable td strong { color: var(--ink); font-size: 17px; font-variant-numeric: tabular-nums; }

/* ---------- 5. 布局⑤ 斜分双栏 + 客户证言（education） ---------- */
.cas-diag { position: relative; display: grid; grid-template-columns: 1fr 1fr; min-height: 420px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.cas-diag-img { position: relative; }
.cas-diag-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; clip-path: polygon(0 0, 100% 0, 92% 100%, 0 100%); }
.cas-diag-txt { background: var(--ink); color: #fff; padding: 52px 48px; }
.cas-diag-txt .cas-eyebrow { color: rgba(255,255,255,.55); }
.cas-diag-txt .cas-eyebrow::before { background: rgba(255,255,255,.7); }
.cas-diag-txt h1 { color: #fff; font-size: clamp(26px, 3vw, 38px); margin: 14px 0 14px; }
.cas-diag-txt p { color: rgba(255,255,255,.68); font-size: 15px; }
.cas-diag-txt .cas-hc { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); color: #fff; }

/* 客户证言（⑤及全部详情页共用） */
.cas-quote {
  position: relative; background: var(--bg-soft); border-radius: var(--radius);
  padding: 48px 48px 40px; border: 1px solid var(--line);
}
.cas-quote::before {
  content: "“"; position: absolute; top: 6px; left: 26px;
  font-size: 84px; line-height: 1; color: var(--line-strong); font-family: Georgia, serif;
}
.cas-quote blockquote { position: relative; font-size: 18px; line-height: 1.9; color: var(--ink); font-weight: 500; max-width: 760px; }
.cas-quote figcaption { margin-top: 22px; display: flex; align-items: center; gap: 14px; font-size: 14px; color: var(--ink-3); }
.cas-quote .qq-avatar {
  width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700;
}

/* ---------- 6. 布局⑥ 玻璃卡网格 + 相关案例（logistics） ---------- */
.cas-hero-glass { background: linear-gradient(160deg, #eef0f3 0%, var(--white) 60%); }
.cas-glass-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: stretch; }
.cas-glass-main {
  background: var(--mist); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.7); border-radius: var(--radius);
  box-shadow: var(--shadow-md); padding: 44px 40px; display: flex; flex-direction: column; justify-content: center;
}
.cas-glass-stack { display: grid; gap: 16px; }
.cas-glass-mini {
  background: var(--mist); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.7); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 22px 24px; display: flex; gap: 16px; align-items: center;
}
.cas-glass-mini .gm-num { font-size: 24px; font-weight: 700; color: var(--line-strong); font-variant-numeric: tabular-nums; }
.cas-glass-mini h3 { font-size: 15px; margin-bottom: 3px; }
.cas-glass-mini p { font-size: 13px; color: var(--ink-3); }

/* ---------- 7. 布局⑦ 左图右文 + 步骤（hotel） ---------- */
.cas-steps { counter-reset: casstep; display: grid; gap: 0; margin-top: 10px; }
.cas-step {
  position: relative; display: grid; grid-template-columns: 64px 1fr; gap: 24px;
  padding: 24px 0 24px 8px; border-bottom: 1px dashed var(--line);
}
.cas-step:last-child { border-bottom: none; }
.cas-step::before {
  counter-increment: casstep; content: counter(casstep, decimal-leading-zero);
  font-size: 22px; font-weight: 700; color: var(--white); background: var(--ink);
  width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-variant-numeric: tabular-nums;
}
.cas-step h3 { font-size: 17px; margin-bottom: 6px; }
.cas-step p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 8. 布局⑧ 图廊式 + 转化设计（furniture） ---------- */
.cas-gallery { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 150px; gap: 14px; }
.cas-gallery a { border-radius: var(--radius-sm); overflow: hidden; position: relative; display: block; }
.cas-gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.cas-gallery a:hover img { transform: scale(1.06); }
.cas-g-item-a { grid-column: span 2; grid-row: span 2; }
.cas-g-item-b { grid-column: span 2; }

/* 转化设计卡（⑧） */
.cas-conv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cas-conv-card { position: relative; padding: 30px 26px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm); overflow: hidden; }
.cas-conv-card .cc-tag {
  position: absolute; top: 0; right: 0; background: var(--ink); color: #fff;
  font-size: 12px; padding: 5px 14px; border-radius: 0 var(--radius) 0 var(--radius-sm);
}
.cas-conv-card h3 { font-size: 17px; margin: 14px 0 8px; }
.cas-conv-card p { font-size: 14px; color: var(--ink-3); }

/* ---------- 9. 布局⑨ 数据带 + FAQ（clothing） ---------- */
.cas-databand {
  background: var(--ink); color: #fff; border-radius: var(--radius);
  padding: 44px 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.cas-databand .db-item .db-num { font-size: clamp(30px, 3.4vw, 44px); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .01em; }
.cas-databand .db-item .db-num small { font-size: .5em; font-weight: 600; color: rgba(255,255,255,.6); margin-left: 3px; }
.cas-databand .db-item p { font-size: 13.5px; color: rgba(255,255,255,.6); margin-top: 6px; }

/* FAQ（details 原生折叠，无 JS） */
.cas-faq { display: grid; gap: 14px; }
.cas-faq details {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0 26px; transition: border-color .25s, box-shadow .25s;
}
.cas-faq details[open] { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.cas-faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center;
  gap: 18px; padding: 20px 0; font-size: 16px; font-weight: 600; color: var(--ink);
}
.cas-faq summary::-webkit-details-marker { display: none; }
.cas-faq summary::after { content: "+"; font-size: 22px; font-weight: 400; color: var(--ink-3); transition: transform .3s var(--ease); }
.cas-faq details[open] summary::after { transform: rotate(45deg); }
.cas-faq .faq-body { padding: 0 0 20px; font-size: 14.5px; color: var(--ink-3); }

/* ---------- 10. 布局⑩ 错落双列 + 页面拆解（makeup） ---------- */
.cas-stag { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.cas-stag-col { display: grid; gap: 28px; }
.cas-stag-col.offset { margin-top: 56px; }
.cas-stag-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.cas-stag-card img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }
.cas-stag-card .sc-body { padding: 24px 26px 26px; }
.cas-stag-card h3 { font-size: 17px; margin-bottom: 8px; }
.cas-stag-card p { font-size: 14px; color: var(--ink-3); }

/* 页面拆解清单（⑩） */
.cas-teardown { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.cas-td { display: grid; grid-template-columns: 40px 1fr; gap: 16px; padding: 22px; background: var(--bg-faint); border: 1px solid var(--line); border-radius: var(--radius); }
.cas-td .td-no { font-size: 14px; font-weight: 700; color: var(--ink-3); font-variant-numeric: tabular-nums; padding-top: 2px; }
.cas-td h3 { font-size: 15.5px; margin-bottom: 5px; }
.cas-td p { font-size: 13.5px; color: var(--ink-3); }

/* ---------- 11. 布局⑪ 大数字 hero + 设计思路（exhibition） ---------- */
.cas-hero-bignum { background: linear-gradient(180deg, var(--bg-soft), var(--white)); }
.cas-bignum-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.cas-bignum { padding: 26px 22px; border-top: 2px solid var(--ink); background: var(--white); border-radius: 0 var(--radius-sm) 0 0; }
.cas-bignum .bn-num { font-size: clamp(30px, 3.6vw, 48px); font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.cas-bignum .bn-num small { font-size: .45em; color: var(--ink-3); font-weight: 600; }
.cas-bignum p { font-size: 13.5px; color: var(--ink-3); margin-top: 8px; }

/* 设计思路（⑪）：交替图文 */
.cas-think { display: grid; gap: 0; }
.cas-think-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 36px 0; border-bottom: 1px solid var(--line); }
.cas-think-row:last-child { border-bottom: none; }
.cas-think-row.rev .cas-think-media { order: 2; }
.cas-think-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.cas-think-media img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }
.cas-think-txt .tt-no { font-size: 13px; letter-spacing: .2em; font-weight: 700; color: var(--line-strong); }
.cas-think-txt h3 { font-size: 21px; margin: 10px 0 10px; }
.cas-think-txt p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 12. 布局⑫ 问答式 + 前后对比（agriculture） ---------- */
.cas-hero-qa { background: var(--bg-faint); }
.cas-qa { display: grid; gap: 18px; margin-top: 10px; }
.cas-qa-item { display: grid; grid-template-columns: 64px 1fr; gap: 22px; padding: 26px 28px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
.cas-qa-q {
  width: 44px; height: 44px; border-radius: 50%; background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--ink); font-size: 16px;
}
.cas-qa-item h3 { font-size: 16.5px; margin-bottom: 8px; }
.cas-qa-item p { font-size: 14.5px; color: var(--ink-3); }

/* 前后对比（⑫） */
.cas-compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 22px; align-items: stretch; }
.cas-cmp { border-radius: var(--radius); padding: 30px 28px; border: 1px solid var(--line); background: var(--white); }
.cas-cmp.before { background: var(--bg-soft); }
.cas-cmp h3 { font-size: 15px; letter-spacing: .08em; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.cas-cmp.before h3 { color: var(--ink-3); }
.cas-cmp.after h3 { color: var(--ink); }
.cas-cmp ul li { position: relative; padding-left: 18px; font-size: 14px; color: var(--ink-2); margin-top: 9px; }
.cas-cmp.before ul li::before { content: "×"; position: absolute; left: 0; color: #b6bcc4; font-weight: 700; }
.cas-cmp.after ul li::before { content: "✓"; position: absolute; left: 0; color: var(--ink); font-weight: 700; }
.cas-cmp-arrow { display: flex; align-items: center; justify-content: center; }
.cas-cmp-arrow svg { width: 34px; height: 34px; color: var(--ink-3); }

/* ---------- 13. 详情页公共组件 ---------- */
/* 页面展示区（阶梯图文行） */
.cas-pages { display: grid; gap: 56px; margin-top: 16px; }
.cas-page-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.cas-page-row.flip .cas-page-media { order: 2; }
.cas-page-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.cas-page-media img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }
.cas-page-txt .pt-tag { font-size: 12.5px; letter-spacing: .16em; font-weight: 700; color: var(--ink-3); }
.cas-page-txt h3 { font-size: 22px; margin: 10px 0 12px; }
.cas-page-txt p { font-size: 14.5px; color: var(--ink-3); }

/* 效果数据带（通用横条） */
.cas-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cas-metric { padding: 28px 24px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.cas-metric .cm-num { font-size: clamp(26px, 2.8vw, 36px); font-weight: 700; font-variant-numeric: tabular-nums; }
.cas-metric .cm-num small { font-size: .5em; color: var(--ink-3); font-weight: 600; }
.cas-metric p { font-size: 13.5px; color: var(--ink-3); margin-top: 8px; }
.cas-metric-note { font-size: 12.5px; color: var(--ink-3); margin-top: 16px; }

/* 相关案例（2 卡） */
.cas-related { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cas-rel-card { display: block; border-radius: var(--radius); overflow: hidden; background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.cas-rel-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.cas-rel-card img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }
.cas-rel-body { padding: 22px 24px 24px; }
.cas-rel-body .tag { margin-bottom: 10px; }
.cas-rel-body h3 { font-size: 17px; margin-bottom: 6px; }
.cas-rel-body p { font-size: 13.5px; color: var(--ink-3); }
.cas-rel-body .ar { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 600; color: var(--ink); }

/* CTA 区（每页结尾） */
.cas-cta {
  position: relative; background: var(--ink); color: #fff; border-radius: var(--radius);
  padding: 56px 56px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; overflow: hidden;
}
.cas-cta::after {
  content: ""; position: absolute; right: -80px; top: -80px; width: 280px; height: 280px;
  border-radius: 50%; border: 1px solid rgba(255,255,255,.12);
}
.cas-cta h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.cas-cta p { color: rgba(255,255,255,.68); font-size: 15px; max-width: 480px; }
.cas-cta-side { display: grid; gap: 12px; }
.cas-cta-side .cc-line { display: flex; align-items: center; gap: 10px; font-size: 15px; color: rgba(255,255,255,.88); }
.cas-cta-side .cc-line svg { width: 16px; height: 16px; color: rgba(255,255,255,.55); }
.cas-cta .btn-light { justify-self: start; margin-top: 8px; }

/* ---------- 14. cases.html 总览页专用 ---------- */
.cas-overview-hero { padding: 76px 0 60px; background: linear-gradient(180deg, var(--bg-faint), var(--white)); }
.cas-tagwall { display: flex; flex-wrap: wrap; gap: 12px; }
.cas-tagwall .chip { cursor: default; }

.cas-casegrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.cas-case-card {
  display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden;
  background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.cas-case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.cas-case-card img { width: 100%; height: auto; aspect-ratio: 2730 / 1536; object-fit: cover; }
.cas-cc-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.cas-cc-body .tag { align-self: flex-start; margin-bottom: 12px; }
.cas-cc-body h3 { font-size: 17.5px; margin-bottom: 8px; }
.cas-cc-body p { font-size: 13.5px; color: var(--ink-3); flex: 1; }
.cas-cc-body .ar { margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--ink); }

/* 总览页交付数据带 */
.cas-deliver { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ---------- 15. 响应式 ---------- */
.cas-narrow { width: min(860px, 100%); margin-inline: auto; }
.cas-pains { margin-top: 20px; padding: 22px 24px; background: var(--bg-faint); border: 1px solid var(--line); border-radius: var(--radius); }
.cas-pains li { position: relative; padding-left: 18px; margin-top: 8px; font-size: 14.5px; color: var(--ink-3); }
.cas-pains li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }
.cas-pains li:first-child { font-weight: 700; color: var(--ink); padding-left: 0; }
.cas-pains li:first-child::before { display: none; }
.cas-gallery-pad { margin-top: 36px; }
.cas-hero-contact-pad { margin-top: 28px; }
.cas-pad-t { margin-top: 14px; }
@media (max-width: 900px) {
  .cas-hero { padding: 48px 0 44px; }
  .cas-split, .cas-glass-grid, .cas-stag, .cas-think-row, .cas-page-row, .cas-cta,
  .cas-diag, .cas-compare { grid-template-columns: 1fr; }
  .cas-think-row.rev .cas-think-media, .cas-page-row.flip .cas-page-media { order: 0; }
  .cas-diag-img { min-height: 240px; }
  .cas-diag-img img { clip-path: none; position: relative; }
  .cas-diag-txt { padding: 36px 28px; }
  .cas-sol, .cas-conv, .cas-metrics, .cas-bignum-grid, .cas-databand,
  .cas-casegrid, .cas-related, .cas-teardown, .cas-deliver { grid-template-columns: 1fr 1fr; }
  .cas-stag-col.offset { margin-top: 0; }
  .cas-gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 140px; }
  .cas-cmp-arrow { transform: rotate(90deg); }
  .cas-cta { padding: 40px 32px; }
}
@media (max-width: 640px) {
  .cas-sol, .cas-conv, .cas-metrics, .cas-bignum-grid, .cas-databand,
  .cas-casegrid, .cas-related, .cas-teardown, .cas-deliver, .cas-stag { grid-template-columns: 1fr; }
  .cas-need { grid-template-columns: 40px 1fr; gap: 14px; }
  .cas-step { grid-template-columns: 48px 1fr; gap: 16px; }
  .cas-step::before { width: 42px; height: 42px; font-size: 16px; }
  .cas-quote { padding: 40px 26px 30px; }
  .cas-cta { padding: 34px 24px; }
  .cas-band-img { height: 38vh; min-height: 260px; }
}
@media (max-width: 480px) {
  .cas-gallery { grid-template-columns: 1fr; grid-auto-rows: 180px; }
  .cas-g-item-a, .cas-g-item-b { grid-column: span 1; grid-row: span 1; }
}