/* ============================================================
   客户案例 · 档案索引
   ============================================================ */

/* 报头 */
.arc-top{padding:54px 0 0;background:var(--w)}
.arc-meta{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:15px;border-bottom:1px solid var(--line);font-family:var(--num);font-size:10px;letter-spacing:.18em;color:var(--ink-3);text-transform:uppercase}
.arc-title{display:grid;grid-template-columns:minmax(0,7.4fr) minmax(300px,4.6fr);gap:64px;align-items:end;padding:36px 0 46px}
.arc-title h1{font-family:var(--serif);font-size:clamp(56px,6.5vw,96px);font-weight:700;line-height:.98;letter-spacing:.015em}
.arc-title h1 .dot{display:inline-block;width:.075em;height:.075em;border-radius:50%;background:var(--red);margin-left:.08em;vertical-align:.18em}
.arc-intro{max-width:430px;padding-bottom:10px}
.arc-intro .lead{font-family:var(--serif);font-size:clamp(18px,1.6vw,22px);font-weight:700;line-height:1.7;letter-spacing:.01em}
.arc-intro .note{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.95;color:var(--ink-2)}
.arc-intro .arrow-link{margin-top:22px;font-size:12.5px}

.arc-stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.arc-stat{padding:20px 26px 22px 0;border-right:1px solid var(--line)}
.arc-stat:last-child{border-right:none;padding-right:0}
.arc-stat b{display:block;font-family:var(--num);font-size:clamp(36px,3.4vw,50px);font-weight:500;line-height:1;letter-spacing:.01em;color:var(--ink)}
.arc-stat span{display:block;margin-top:9px;font-size:11px;letter-spacing:.05em;color:var(--ink-3)}
.arc-stat em{display:block;margin-top:5px;font-style:normal;font-size:10px;letter-spacing:.03em;color:var(--ink-3)}

/* 宽幅图版 */
.arc-plate{margin-top:40px}
.arc-plate .plate{position:relative;overflow:hidden;aspect-ratio:21/7.2;background:#ececea}
.arc-plate img{width:100%;height:100%;object-fit:cover;object-position:center 56%;filter:grayscale(.18) saturate(.88) contrast(1.05)}
.arc-plate figcaption{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:12px 0;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase}
.arc-plate figcaption b{font-family:var(--num);font-weight:500;letter-spacing:.2em;color:var(--ink-2)}

/* 重点档案 */
.record{padding:104px 0 116px;background:var(--w)}
.rec-head{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-top:15px;border-top:1px solid var(--ink);font-family:var(--num);font-size:10px;letter-spacing:.18em;color:var(--ink-3);text-transform:uppercase}
.rec-head .rd{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--red);margin-right:9px;vertical-align:1px}
.rec-grid{display:grid;grid-template-columns:7.1fr 4.9fr;gap:66px;align-items:start;margin-top:36px}
.rec-fig{position:relative;overflow:hidden;aspect-ratio:4/3;margin:0;background:#ececea}
.rec-fig img{width:100%;height:100%;object-fit:cover;filter:grayscale(.12) saturate(.9) contrast(1.05);transition:transform 1s var(--ease)}
.rec-fig:hover img{transform:scale(1.02)}
.rec-fig .no{position:absolute;left:14px;top:14px;background:var(--w);font-family:var(--num);font-size:11px;letter-spacing:.12em;color:var(--ink);padding:6px 10px}
.rec-fig figcaption{position:absolute;left:0;right:0;bottom:0;padding:16px 18px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.78));font-size:10.5px;letter-spacing:.06em;color:rgba(255,255,255,.78);display:flex;justify-content:space-between;gap:16px}
.rec-copy .ind{font-family:var(--num);font-size:10px;letter-spacing:.16em;color:var(--red);text-transform:uppercase}
.rec-copy h2{margin-top:12px;font-family:var(--serif);font-size:clamp(32px,3.3vw,46px);font-weight:700;line-height:1.38;letter-spacing:.005em}
.rec-copy .summary{margin-top:16px;font-size:12.5px;line-height:1.9;color:var(--ink-3);max-width:36em}
.rec-fields{margin-top:26px;border-top:1px solid var(--line)}
.rec-fields div{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:14px 0;border-bottom:1px solid var(--line-2)}
.rec-fields dt{font-family:var(--num);font-size:10px;font-weight:600;letter-spacing:.14em;color:var(--ink-3);padding-top:3px}
.rec-fields dd{font-size:12.5px;line-height:1.85;color:var(--ink-2)}
.rec-fields dd b{font-family:var(--num);font-size:16px;font-weight:600;color:var(--ink);letter-spacing:.02em}
.rec-copy .arrow-link{margin-top:26px;font-size:12.5px}

/* 档案区 */
.archive{padding:96px 0 118px;background:var(--tint-band);border-top:1px solid var(--line)}
.arc-head{display:grid;grid-template-columns:6.2fr 5.8fr;gap:64px;align-items:end;padding-bottom:32px;border-bottom:1px solid var(--ink)}
.arc-head h2{font-family:var(--serif);font-size:clamp(38px,4.2vw,58px);font-weight:700;line-height:1.3}
.arc-head .note{font-size:13.5px;line-height:1.95;color:var(--ink-2);max-width:35em;padding-bottom:5px}
.arc-body{display:grid;grid-template-columns:212px minmax(0,1fr);gap:66px;align-items:start;margin-top:36px}

/* 左侧行业索引 */
.arc-rail{position:sticky;top:110px}
.arc-rail .rl-k{font-family:var(--num);font-size:10px;letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase;padding-bottom:10px;border-bottom:1px solid var(--ink)}
.arc-filters{display:flex;flex-direction:column}
.arc-filter{display:flex;justify-content:space-between;align-items:baseline;gap:14px;width:100%;padding:13px 0;border:0;border-bottom:1px solid rgba(17,17,17,.12);background:none;font-family:var(--sans);font-size:13px;font-weight:500;color:var(--ink-2);text-align:left;cursor:pointer;transition:color .25s,padding-left .3s var(--ease)}
.arc-filter b{font-family:var(--num);font-size:10.5px;font-weight:500;letter-spacing:.08em;color:var(--ink-3);transition:color .25s}
.arc-filter:hover,.arc-filter.on{color:var(--red);padding-left:4px}
.arc-filter:hover b,.arc-filter.on b{color:var(--red)}
.arc-filter span{display:inline-flex;align-items:baseline;gap:9px}
.arc-filter span::before{content:"";width:4px;height:4px;border-radius:50%;background:transparent;transition:background .25s}
.arc-filter.on span::before{background:var(--red)}
.arc-rail .rl-note{margin-top:22px;font-size:10.5px;line-height:1.9;color:var(--ink-3);letter-spacing:.02em}
.arc-rail .rl-note b{font-family:var(--num);font-weight:500;color:var(--ink-2)}

/* 右侧档案列表 */
.arc-list-head{display:grid;grid-template-columns:92px 42px minmax(0,1fr) 228px 110px;gap:20px;align-items:center;padding:0 0 10px;border-bottom:1px solid var(--ink);font-family:var(--num);font-size:9.5px;letter-spacing:.16em;color:var(--ink-3);text-transform:uppercase}
.arc-list-head .count{font-family:var(--num);letter-spacing:.08em;color:var(--ink-2);text-align:right;white-space:nowrap}
.arc-row{position:relative;display:grid;grid-template-columns:92px 42px minmax(0,1fr) 228px 110px;gap:20px;align-items:center;padding:17px 0;border-bottom:1px solid rgba(17,17,17,.13);transition:background .3s}
.arc-row:hover{background:rgba(255,255,255,.5)}
.arc-thumb{width:92px;height:66px;overflow:hidden;background:#e6e6e4;margin:0}
.arc-thumb img{width:100%;height:100%;object-fit:cover;filter:grayscale(.4) saturate(.8) contrast(1.04);transition:transform .8s var(--ease),filter .5s}
.arc-row:hover .arc-thumb img{transform:scale(1.06);filter:grayscale(0) saturate(.9)}
.arc-no{font-family:var(--num);font-size:11.5px;letter-spacing:.08em;color:var(--ink-3)}
.arc-main .ind{display:block;font-family:var(--num);font-size:9px;letter-spacing:.13em;color:var(--red);text-transform:uppercase;margin-bottom:5px}
.arc-main h3{text-wrap:balance;font-family:var(--serif);font-size:19px;font-weight:700;line-height:1.55;letter-spacing:.005em;transition:color .25s}
.arc-main p{margin-top:4px;font-size:10.5px;line-height:1.6;color:var(--ink-3)}
.arc-result{padding-left:20px;border-left:1px solid rgba(17,17,17,.13);font-size:10.5px;line-height:1.65;color:var(--ink-2)}
.arc-result b{display:block;font-family:var(--num);font-size:14px;font-weight:600;letter-spacing:.02em;color:var(--ink);margin-bottom:3px}
.arc-row:hover .arc-main h3{color:var(--red)}
.arc-arrow{justify-self:end;font-family:var(--num);font-size:15px;color:var(--ink-3);transition:transform .3s var(--ease),color .25s}
.arc-row:hover .arc-arrow{color:var(--red);transform:translate(3px,-3px)}
.arc-row.is-hidden{display:none}
.arc-empty{padding:34px 0;font-size:12px;color:var(--ink-3)}

/* 分叠 */
.arc-pager{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:24px;padding:15px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}
.arc-pager[hidden]{display:none}
.pg-meta span{display:block;font-family:var(--num);font-size:9px;letter-spacing:.18em;color:var(--ink-3);text-transform:uppercase}
.pg-meta b{display:block;margin-top:4px;font-family:var(--num);font-size:13px;font-weight:500;letter-spacing:.07em;color:var(--ink)}
.pg-tabs{display:flex;gap:8px}
.pg-tab{display:flex;align-items:baseline;gap:9px;border:1px solid rgba(17,17,17,.22);background:none;padding:10px 13px;font-family:var(--num);font-size:11px;letter-spacing:.06em;color:var(--ink-2);cursor:pointer;transition:color .25s,border-color .25s,background .25s}
.pg-tab i{font-style:normal;font-size:10px;color:var(--ink-3);letter-spacing:.04em}
.pg-tab:hover{border-color:var(--ink);color:var(--ink)}
.pg-tab.on{background:var(--ink);border-color:var(--ink);color:#fff}
.pg-tab.on i{color:rgba(255,255,255,.6)}
.arc-pager:not([hidden]) + .arc-end{margin-top:0;padding-top:14px;border-top:none}

.arc-end{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-top:30px;padding-top:18px;border-top:1px solid rgba(17,17,17,.2);font-size:10.5px;line-height:1.9;color:var(--ink-3);letter-spacing:.02em}
.arc-end .arrow-link{font-size:12px;white-space:nowrap;color:var(--ink)}
.arc-end .arrow-link:hover{color:var(--red)}

/* 移动端 */
@media(max-width:1120px){
  .arc-title{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .arc-title h1{font-size:clamp(56px,8vw,92px)}
  .arc-intro{max-width:640px}
  .rec-grid{grid-template-columns:1fr;gap:32px}
  .rec-fig{aspect-ratio:16/10}
  .arc-body{grid-template-columns:1fr;gap:28px}
  .arc-head{grid-template-columns:1fr;gap:18px;padding-bottom:26px}
  .arc-rail{position:static}
  .arc-filters{flex-direction:row;flex-wrap:wrap;gap:0 26px;border-bottom:1px solid rgba(17,17,17,.16)}
  .arc-filter{width:auto;padding:11px 0;border-bottom:none;font-size:12px}
  .arc-rail .rl-note{display:none}
  .arc-row{grid-template-columns:88px 38px minmax(0,1fr) 200px 110px;gap:16px}
  .arc-list-head{grid-template-columns:88px 38px minmax(0,1fr) 200px 110px;gap:16px}
}
@media(max-width:820px){
  .arc-stats{grid-template-columns:1fr 1fr}
  .arc-stat{padding:18px 20px 18px 0}
  .arc-stat:nth-child(2n){border-right:none;padding-right:0}
  .arc-stat:nth-child(n+3){border-top:1px solid var(--line)}
  .record{padding:76px 0 84px}
  .arc-plate .plate{aspect-ratio:16/9}
  .arc-plate figcaption{font-size:9px}
  .arc-list-head{display:flex;justify-content:flex-end;padding:0 0 9px;border-bottom:1px solid var(--ink)}
  .arc-list-head span:not(.count){display:none}
  .arc-row{grid-template-columns:76px 1fr 16px;gap:14px;padding:16px 0;align-items:start}
  .arc-thumb{width:76px;height:58px;grid-row:1 / span 2}
  .arc-no{display:none}
  .arc-main{grid-column:2}
  .arc-main h3{font-size:17px;line-height:1.55}
  .arc-main p{display:none}
  .arc-result{grid-column:2;padding-left:0;border-left:none;font-size:10px;margin-top:2px}
  .arc-result b{display:inline-block;font-size:12px;margin:0 4px 0 0}
  .arc-result b::after{content:"·";margin:0 4px;color:var(--ink-3)}
  .arc-arrow{grid-column:3;grid-row:1;align-self:center}
  .arc-pager{display:block;padding:14px 0}
  .pg-tabs{margin-top:12px}
  .pg-tab{flex:1;justify-content:space-between;padding:11px 12px}
  .arc-end{display:block}
  .arc-end .arrow-link{margin-top:14px}
}
@media(max-width:560px){
  .arc-top{padding-top:34px}
  .arc-meta{font-size:9px}
  .arc-title h1{font-size:clamp(48px,12vw,68px)}
  .arc-intro .lead{font-size:17px}
  .arc-stats{border-bottom:none}
  .arc-stat b{font-size:34px}
  .arc-plate{margin-top:28px}
  .arc-plate .plate{aspect-ratio:4/3}
  .arc-plate figcaption{letter-spacing:.08em}
  .rec-head{font-size:9px}
  .rec-copy h2{font-size:28px}
  .archive{padding:68px 0 80px}
  .arc-head h2{font-size:32px}
  .arc-filters{gap:0 18px}
  .arc-filter{font-size:11.5px;padding:10px 0}
  .arc-filter b{font-size:9.5px}
  .arc-row{grid-template-columns:66px 1fr 14px;gap:12px}
  .arc-thumb{width:66px;height:52px}
  .arc-main h3{font-size:15.5px}
  .arc-main .ind{font-size:8px;letter-spacing:.1em}
  .arc-result{font-size:9.5px}
  .arc-result b{font-size:11px}
}

/* 重点档案 · 全部档案之后 */
.featured-pair{padding:96px 0 110px;background:#fff;border-top:1px solid var(--line)}
.pair-head{display:grid;grid-template-columns:7fr 5fr;gap:60px;align-items:end;margin-top:26px;padding-bottom:30px;border-bottom:1px solid var(--ink)}
.pair-head h2{font-family:var(--serif);font-size:clamp(38px,4.4vw,60px);font-weight:700;line-height:1.3}
.pair-head p{font-size:13px;line-height:1.95;color:var(--ink-2);max-width:34em;padding-bottom:4px}
.pair-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin-top:34px}
.pair-card{display:block;min-width:0}
.pair-card figure{position:relative;overflow:hidden;aspect-ratio:16/10;margin:0 0 16px;background:#e9e8e5}
.pair-card img{width:100%;height:100%;object-fit:cover;filter:grayscale(.14) saturate(.92) contrast(1.03);transition:transform .8s var(--ease),filter .4s}
.pair-card:hover img{transform:scale(1.03);filter:grayscale(0) saturate(.95)}
.pair-meta{display:flex;justify-content:space-between;gap:16px;padding-bottom:10px;border-bottom:1px solid var(--line);font-family:var(--num);font-size:9.5px;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase}
.pair-meta span:first-child{color:var(--red)}
.pair-card h3{margin-top:12px;font-family:var(--serif);font-size:clamp(20px,2.2vw,27px);font-weight:700;line-height:1.55;transition:color .25s}
.pair-card:hover h3{color:var(--red)}
.pair-card p{margin-top:8px;font-size:11.5px;line-height:1.8;color:var(--ink-3)}
.pair-go{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-size:11px;font-weight:600;color:var(--red)}
.pair-go i{font-style:normal;font-family:var(--num);transition:transform .3s var(--ease)}
.pair-card:hover .pair-go i{transform:translate(4px,-3px)}

/* 数字与列表的轻微 hover */
.arc-stats{padding-left:clamp(0px,3vw,56px)}
.arc-stat{position:relative;transition:background .3s,transform .3s}
.arc-stat::before{content:"";position:absolute;left:0;right:26px;top:-1px;height:1px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.arc-stat:hover{background:rgba(224,11,22,.025);transform:translateY(-2px)}
.arc-stat:hover::before{transform:scaleX(1)}
.arc-stat b{transition:color .25s}
.arc-stat:hover b{color:var(--red)}
.arc-row .arc-no,.arc-result b{transition:color .25s}
.arc-row:hover .arc-no,.arc-row:hover .arc-result b{color:var(--red)}
.arc-plate .plate img{transition:transform 1s var(--ease)}
.arc-plate:hover .plate img{transform:scale(1.02)}

@media(max-width:1100px){
  .pair-head{grid-template-columns:1fr;gap:18px}
  .arc-stats{padding-left:0}
}
@media(max-width:760px){
  .featured-pair{padding:68px 0 80px}
  .pair-head h2{font-size:32px}
  .pair-grid{grid-template-columns:1fr;gap:30px;margin-top:26px}
  .pair-card figure{aspect-ratio:16/10}
  .arc-stat::before{right:18px}
}

/* 重点档案：图片右置的镜像版 */
.record-rev .rec-grid{grid-template-columns:4.9fr 7.1fr}
.record-rev .rec-copy{order:1}
.record-rev .rec-fig{order:2}

/* 四个数据与左侧竖分隔线之间留白 */
.arc-stat + .arc-stat{padding-left:clamp(20px,2.2vw,32px)}
@media(max-width:1100px){
  .arc-stat + .arc-stat{padding-left:0}
  .arc-stat:nth-child(even){padding-left:18px}
  .record-rev .rec-grid{grid-template-columns:1fr}
  .record-rev .rec-fig{order:-1}
}

/* 镜像重点档案：窄文案列里的标题收一档，避免单字换行 */
.record-rev .rec-copy h2{font-size:clamp(28px,2.9vw,38px);line-height:1.42;text-wrap:balance}