/* ============================================================
   首页 · 封面 / 红点诊断线 / 五步时间轴 / 产品目录 / 成效 / 案例
   ============================================================ */

/* 首页页头：压在封面上，滚动后转白 */
body.home .head{position:fixed;top:0;left:0;right:0;background:transparent;border-bottom:1px solid rgba(17,17,17,.12);z-index:90;transition:background .35s,border-color .35s,box-shadow .35s}
body.home .head .logo-light{display:none}
body.home .head .logo-dark{display:block}
body.home .head nav a{color:var(--ink-2)}
body.home .head nav a.on{color:var(--ink)}
body.home .head .tel{color:var(--ink)}
body.home .head .nav-toggle span{background:var(--ink)}
body.home .head .nav-toggle{border-color:rgba(17,17,17,.2);background:transparent}
body.home .head.scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:0 1px 0 var(--line),0 10px 26px -24px rgba(0,0,0,.28)}
body.home .head.scrolled .logo-light{display:none}
body.home .head.scrolled .logo-dark{display:block}
body.home .head.scrolled nav a{color:var(--ink-2)}
body.home .head.scrolled nav a.on{color:var(--ink)}
body.home .head.scrolled .tel{color:var(--ink)}
body.home .head.scrolled .nav-toggle span{background:var(--ink)}
body.home .head.scrolled .nav-toggle{border-color:var(--line);background:#fff}
body.home .head.nav-open{background:#fff;border-bottom-color:var(--line)}
body.home .head.nav-open .logo-light{display:none}
body.home .head.nav-open .logo-dark{display:block}
body.home .head.nav-open nav a{color:var(--ink-2)}
body.home .head.nav-open .tel{color:var(--ink)}
body.home .head.nav-open .nav-toggle span{background:var(--ink)}
body.home .head.nav-open .nav-toggle{border-color:var(--line);background:#fff}

/* 封面 */
.cover{position:relative;min-height:100vh;overflow:hidden;background:#eaf6ff;color:var(--ink);display:flex;align-items:stretch;padding:108px 0 30px}
.cover-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:right 50%;opacity:0;transition:opacity .9s var(--ease)}
.cover-bg.on{opacity:1}
.cover::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(234,246,255,.6) 0%,rgba(234,246,255,0) 26%,rgba(234,246,255,0) 66%,rgba(255,255,255,.99) 100%),
  linear-gradient(90deg,rgba(234,246,255,.93) 0%,rgba(234,246,255,.66) 34%,rgba(234,246,255,.14) 58%,rgba(234,246,255,0) 76%)}
.cover .wrap{position:relative;z-index:2;display:flex;flex-direction:column;min-height:calc(100vh - 138px)}
.cover-meta{display:flex;justify-content:space-between;font-family:var(--num);font-size:10.5px;letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase}
.cover-main{margin-top:auto}
.cover-kicker{font-family:var(--serif);font-size:14px;letter-spacing:.12em;color:var(--ink-2);margin-bottom:18px}
.cover h1{font-family:var(--serif);font-size:clamp(46px,6.5vw,104px);font-weight:700;line-height:1.08;letter-spacing:.004em;color:var(--ink)}
.cover h1 .dot{display:inline-block;width:.11em;height:.11em;border-radius:50%;background:var(--red);margin-left:.1em;vertical-align:.12em}
.cover-foot{display:grid;grid-template-columns:6fr 6fr;gap:64px;align-items:end;margin-top:38px;padding-top:24px;border-top:1px solid rgba(17,17,17,.18)}
.cover-foot p{font-size:14.5px;line-height:1.95;color:var(--ink-2);max-width:33em}
.cover-actions{display:flex;justify-content:flex-end;align-items:center;gap:28px;flex-wrap:wrap}
.cover-link{display:inline-flex;align-items:center;gap:9px;color:var(--ink);font-size:13px;font-weight:600;border-bottom:1px solid rgba(17,17,17,.4);padding-bottom:6px;transition:color .25s,border-color .25s}
.cover-link:hover{color:var(--red);border-color:var(--red)}
.cover-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:30px;padding-top:13px;border-top:1px solid rgba(17,17,17,.14);font-family:var(--num);font-size:9.5px;letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase}
.cover-slide-nav{display:flex;align-items:center;gap:8px}
.cover-slide-tab{border:0;background:none;padding:4px 0 5px;font-family:var(--num);font-size:9.5px;letter-spacing:.18em;color:rgba(17,17,17,.42);cursor:pointer;transition:color .25s;position:relative}
.cover-slide-tab.on{color:var(--ink)}
.cover-slide-tab.on::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--red)}
.cover-slide-tab:hover{color:var(--red)}
.cover-slide-sep{color:rgba(17,17,17,.25);font-size:9px}

/* 我们是谁 */
.who{background:var(--tint-band);padding:104px 0 112px}
.who-grid{display:grid;grid-template-columns:6.6fr 5.4fr;gap:70px;align-items:start;margin-top:30px}
.who-copy h2{font-family:var(--serif);font-size:clamp(38px,4.4vw,60px);font-weight:700;line-height:1.3}
.who-lead{margin-top:22px;font-size:13.5px;line-height:1.95;color:var(--ink-2);max-width:33em}
.who-facts{display:grid;grid-template-columns:repeat(4,1fr);margin-top:32px;border-top:1px solid var(--ink)}
.who-fact{padding:18px 16px 0 0;border-right:1px solid var(--line)}
.who-fact:last-child{border-right:none;padding-right:0}
.who-fact b{display:block;font-family:var(--num);font-size:clamp(34px,3.4vw,48px);font-weight:500;line-height:1;letter-spacing:-.01em}
.who-fact b em{font-style:normal;font-size:.42em;letter-spacing:0;margin-left:2px;color:var(--ink-2)}
.who-fact span{display:block;margin-top:9px;font-size:10.5px;line-height:1.5;color:var(--ink-3)}
.who-cred{margin-top:12px;font-size:10px;letter-spacing:.08em;color:var(--ink-3)}
.who-copy .arrow-link{display:inline-flex;margin-top:24px;font-size:12.5px}
.who-people{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.who-person{margin:0}
.who-person img{display:block;width:100%;aspect-ratio:3/4;object-fit:cover;object-position:center 22%;background:#e6e5e2;filter:saturate(.96)}
.who-person figcaption{padding-top:10px}
.who-person figcaption b{display:block;font-family:var(--serif);font-size:15px;font-weight:700}
.who-person figcaption span{display:block;margin-top:3px;font-size:10px;line-height:1.5;color:var(--ink-3)}
.who-note{grid-column:1/-1;margin-top:2px;padding-top:12px;border-top:1px solid var(--line);font-size:10.5px;line-height:1.7;color:var(--ink-3)}

/* 红点诊断线 */
.diagnosis{padding:118px 0 126px;background:#fff}
.diag-head{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:end;margin-top:28px;padding-bottom:36px}
.diag-head h2{font-family:var(--serif);font-size:clamp(40px,4.4vw,62px);font-weight:700;line-height:1.3}
.diag-head .note{font-size:14px;line-height:1.95;color:var(--ink-2);max-width:32em;padding-bottom:4px}
.diag-line{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--ink);margin-top:18px}
.diag-item{position:relative;display:flex;flex-direction:column;padding:34px 22px 0 0;border-right:1px solid var(--line);min-height:260px;transition:background .3s}
.diag-item:not(:first-child){padding-left:26px}
.diag-item::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.diag-item:hover::before{transform:scaleX(1)}
.diag-item:hover{background:rgba(224,11,22,.025)}
.diag-item:last-child{border-right:none;padding-right:0}
.diag-item .dot{position:absolute;top:-4px;left:0;width:7px;height:7px;border-radius:50%;background:var(--red)}
.diag-item .no{font-family:var(--num);font-size:10.5px;letter-spacing:.12em;color:var(--ink-3)}
.diag-item .tag{display:block;margin-top:16px;font-family:var(--num);font-size:10px;letter-spacing:.16em;color:var(--red);text-transform:uppercase}
.diag-item p{margin-top:9px;font-family:var(--serif);font-size:16px;font-weight:700;line-height:1.75;color:var(--ink);max-width:15em}
.diag-item .go{margin-top:auto;padding-top:20px;display:inline-flex;align-items:center;gap:6px;font-size:10.5px;color:var(--ink-3);transition:color .25s}
.diag-item .go i{font-style:normal;font-family:var(--num);font-size:13px;transition:transform .3s var(--ease)}
.diag-item:hover p{color:var(--red)}
.diag-item:hover .go{color:var(--red)}
.diag-item:hover .go i{transform:translate(3px,-3px)}
.diag-foot{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3)}
.diag-foot .arrow-link{font-size:12px}

/* 五步时间轴 */
.method{background:var(--tint-band);padding:112px 0 122px}
.method-grid{display:grid;grid-template-columns:5fr 7fr;gap:84px;align-items:center}
.method-copy{position:relative}
.method-copy h2{font-family:var(--serif);font-size:clamp(38px,4.2vw,58px);font-weight:700;line-height:1.3;margin-top:24px}
.method-copy p{margin-top:20px;font-size:13.5px;line-height:1.95;color:var(--ink-2);max-width:29em}
.method-copy .arrow-link{margin-top:30px;font-size:12.5px}
.timeline{border-top:1px solid var(--ink);border-left:1px solid rgba(224,11,22,.32);padding-left:30px}
.tl-item{display:grid;grid-template-columns:62px 1fr auto;gap:22px;align-items:start;padding:22px 0;border-bottom:1px solid var(--line);transition:background .3s}
.tl-item:hover{background:rgba(224,11,22,.03)}
.tl-item .no{font-family:var(--num);font-size:38px;font-weight:500;line-height:1;color:var(--ink);letter-spacing:-.01em;transition:color .3s}
.tl-item:hover .no{color:var(--red)}
.tl-item h3{font-family:var(--serif);font-size:20px;font-weight:700;line-height:1.5}
.tl-item p{margin-top:7px;font-size:12.5px;line-height:1.8;color:var(--ink-2);max-width:35em}
.tl-item .deliver{font-size:10.5px;line-height:1.6;color:var(--red);text-align:right;white-space:nowrap;padding-top:5px}

/* 产品目录 */
.catalog{padding:112px 0 122px;background:#fff}
.catalog-head{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:end;margin-top:28px;padding-bottom:36px}
.catalog-head h2{font-family:var(--serif);font-size:clamp(40px,4.4vw,62px);font-weight:700;line-height:1.3}
.catalog-head .note{font-size:14px;line-height:1.95;color:var(--ink-2);max-width:32em;padding-bottom:4px}
.catalog-grid{display:grid;grid-template-columns:6fr 6fr;gap:64px;margin-top:12px;align-items:start}
.cat-row{position:relative;display:grid;grid-template-columns:34px 1fr auto 18px;gap:16px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:background .3s}
.cat-row::before{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.cat-row:hover{background:rgba(224,11,22,.025)}
.cat-row:hover::before,.cat-row.on::before{transform:scaleX(1)}
.cat-row:hover h3{color:var(--red)}
.cat-row:first-child{border-top:1px solid var(--line)}
.cat-row .no{font-family:var(--num);font-size:10.5px;letter-spacing:.1em;color:var(--ink-3)}
.cat-row h3{font-family:var(--serif);font-size:27px;font-weight:700;line-height:1.35;transition:color .25s}
.cat-row p{margin-top:4px;font-size:11.5px;line-height:1.6;color:var(--ink-3)}
.cat-row .count{font-family:var(--num);font-size:10px;letter-spacing:.12em;color:var(--ink-3);white-space:nowrap}
.cat-row .ar{font-family:var(--num);font-size:15px;color:var(--ink-3);transition:transform .3s var(--ease),color .25s}
.cat-row.on .no,.cat-row.on h3{color:var(--red)}
.cat-row.on .ar{color:var(--red);transform:translate(3px,-3px)}
.cat-row:hover h3{color:var(--red)}
.cat-row:hover .ar{color:var(--red);transform:translate(3px,-3px)}
.cat-thumb{display:none}
.cat-fig{position:relative;overflow:hidden;background:#ededeb;aspect-ratio:4/3}
.cat-fig img{width:100%;height:100%;object-fit:cover;filter:grayscale(.2) saturate(.9) contrast(1.05);transition:transform .8s var(--ease),opacity .3s}
.cat-fig:hover img{transform:scale(1.02)}
.cat-fig figcaption{position:absolute;left:0;bottom:0;background:#fff;color:var(--ink-3);font-size:10px;letter-spacing:.1em;padding:9px 13px;text-transform:uppercase}
.catalog-foot{display:flex;justify-content:space-between;align-items:center;margin-top:42px;padding-top:20px;border-top:1px solid var(--line);font-size:11.5px;color:var(--ink-3)}

/* 成效 */
.results{background:linear-gradient(180deg,rgba(8,10,20,.94),rgba(8,10,20,.94)),url("../assets/img/banner-solutions-new.webp") center 50%/cover;color:#f5f5f3;padding:104px 0 112px}
.results .kicker{color:#ffb27a}
.results .kicker::before{background:#ff6b3d}
.res-head{display:grid;grid-template-columns:7fr 5fr;gap:60px;align-items:end;margin-top:28px;padding-bottom:34px;border-bottom:1px solid #2e2e2e}
.res-head h2{font-family:var(--serif);font-size:clamp(38px,4.2vw,60px);font-weight:700;line-height:1.3;color:#fff}
.res-head p{font-size:13px;line-height:1.9;color:#8f8f8f;max-width:30em;padding-bottom:4px}
.res-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:0}
.res-item{padding:32px 24px 0 0;border-right:1px solid #2e2e2e;transition:background .3s}
.res-item:hover{background:rgba(255,255,255,.025)}
.res-item + .res-item{padding-left:26px}
.res-item:last-child{border-right:none;padding-right:0}
.res-num{font-family:var(--num);font-size:clamp(28px,3.5vw,50px);font-weight:500;line-height:1;color:#fff;letter-spacing:0;white-space:nowrap;transition:color .3s}
.res-item:hover .res-num{color:#ff8a5c}
.res-num .ar{color:#ff6b3d;font-size:.55em;margin:0 .08em}
.res-label{margin-top:14px;font-size:13px;color:#f5f5f3}
.res-note{margin-top:7px;font-size:11px;line-height:1.7;color:#868686}

/* 案例（一大两小，原始高度） */
.cases{padding:112px 0 122px;background:#fff}
.case-feature{display:grid;grid-template-columns:7fr 5fr;gap:40px;margin-top:40px;align-items:stretch}
.case-main{position:relative;display:block;height:100%;min-height:520px;overflow:hidden;background:#111}
.case-main figure{position:absolute;inset:0;overflow:hidden;background:#111}
.case-main img{width:100%;height:100%;object-fit:cover;filter:grayscale(.2) saturate(.92) contrast(1.04);transition:transform .8s var(--ease)}
.case-main:hover img{transform:scale(1.025)}
.case-main .hc-meta{display:flex;justify-content:space-between;padding:16px 0 10px;border-bottom:1px solid var(--line)}
.case-main .hc-meta span{font-family:var(--num);font-size:10px;letter-spacing:.14em;color:var(--red);text-transform:uppercase}
.case-main .hc-meta i{font-style:normal;font-family:var(--num);font-size:10px;letter-spacing:.12em;color:var(--ink-3)}
.case-main h3{margin-top:14px;font-family:var(--serif);font-size:27px;font-weight:700;line-height:1.55}
.case-main .result{margin-top:15px;padding-top:13px;border-top:1px solid var(--line-2);font-family:var(--serif);font-size:22px;font-weight:700;color:var(--ink)}
.case-main .result span{display:block;margin-top:5px;font-family:var(--sans);font-size:11.5px;font-weight:400;color:var(--ink-3)}
.case-main .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:11.5px;color:var(--red);font-weight:600}
.case-main .go i{font-style:normal;font-family:var(--num);transition:transform .3s var(--ease)}
.case-main:hover .go i{transform:translateX(4px)}
.case-side{display:flex;flex-direction:column;gap:22px;height:100%}
.case-small{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center;border-top:1px solid var(--line);padding-top:18px}
.case-small figure{overflow:hidden;aspect-ratio:16/10;background:#e9e9e7}
.case-small img{width:100%;height:100%;object-fit:cover;filter:grayscale(.2) saturate(.92) contrast(1.04);transition:transform .7s var(--ease)}
.case-small:hover img{transform:scale(1.03)}
.case-small .meta{font-family:var(--num);font-size:10px;letter-spacing:.12em;color:var(--red);text-transform:uppercase}
.case-small h3{margin-top:8px;font-family:var(--serif);font-size:16.5px;font-weight:700;line-height:1.65}
.case-small .res{margin-top:8px;font-size:11.5px;line-height:1.7;color:var(--ink-2)}
.case-small .go{display:inline-flex;align-items:center;gap:5px;margin-top:9px;font-size:10.5px;color:var(--red);font-weight:600}
.case-small .go i{font-style:normal;font-family:var(--num);transition:transform .3s var(--ease)}
.case-small:hover .go i{transform:translate(3px,-3px)}
.case-more{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:16px;color:var(--ink-3);margin-top:auto}
.case-more .n{font-family:var(--num);font-size:24px;font-weight:500;line-height:1;color:var(--red)}
.case-more .t{font-size:11px;line-height:1.7}
.case-more .ar{margin-left:auto;font-family:var(--num);font-size:15px;color:var(--red);transition:transform .3s var(--ease)}
.case-more:hover .ar{transform:translateX(4px)}

@media(max-width:1100px){
  .cover-foot{grid-template-columns:1fr;gap:24px}
  .cover-actions{justify-content:flex-start}
  .who-grid{grid-template-columns:1fr;gap:40px}
  .who-people{max-width:640px;width:100%}
  .diag-head,.catalog-head{grid-template-columns:1fr;gap:20px}
  .diag-line{grid-template-columns:repeat(3,1fr)}
  .diag-item{border-right:none;border-bottom:1px solid var(--line);min-height:230px;padding-right:20px}
  .diag-item:nth-child(3n+1){border-right:1px solid var(--line);padding-left:0}
  .diag-item:nth-child(3n+2){border-right:1px solid var(--line);padding-left:26px}
  .diag-item:nth-child(3n){padding-left:26px}
  .method-grid{grid-template-columns:1fr;gap:44px}
  .method-copy{position:static}
  .catalog-grid{grid-template-columns:1fr;gap:36px}
  .cat-fig{display:none}
  .cat-thumb{display:block;width:92px;height:62px;object-fit:cover;filter:grayscale(.2) saturate(.9)}
  .cat-row{grid-template-columns:34px 1fr auto 92px 18px}
  .case-feature{grid-template-columns:1fr;gap:36px}
  .case-main{min-height:480px}
  .case-side{display:grid;grid-template-columns:1fr 1fr;gap:24px}
  .case-small{grid-template-columns:1fr;gap:12px}
  .case-small figure{order:-1}
  .case-more{grid-column:1/-1}
  .res-grid{grid-template-columns:1fr 1fr}
  .res-item{padding:26px 24px 26px 0;border-bottom:1px solid #2e2e2e}
  .res-item:nth-child(odd){padding-left:0}
  .res-item:nth-child(even){padding-left:26px}
  .res-item:nth-child(2){border-right:none}
  .res-item:nth-child(3),.res-item:nth-child(4){border-bottom:none;padding-top:26px}
}
@media(max-width:760px){
  .cover{min-height:100svh;padding:96px 0 24px}
  .cover .wrap{min-height:calc(100svh - 120px)}
  .cover-meta{font-size:9px}
  .cover-kicker{font-size:12px;margin-bottom:12px}
  .cover h1{font-size:44px;line-height:1.12}
  .cover-foot{gap:18px;margin-top:26px;padding-top:18px}
  .cover-foot p{font-size:12.5px;line-height:1.85}
  .cover-actions{gap:16px}
  .cover-bottom{font-size:8.5px;margin-top:20px;gap:12px}
  .cover-scroll{display:none}
  .cover-slide-nav{gap:6px}
  .cover-slide-tab{font-size:9px;letter-spacing:.14em}
  .who{padding:76px 0 86px}
  .who-copy h2{font-size:34px}
  .who-lead{font-size:12.5px;line-height:1.85;margin-top:16px}
  .who-facts{grid-template-columns:1fr 1fr;margin-top:26px}
  .who-fact{padding:16px 14px 14px 0;border-bottom:1px solid var(--line)}
  .who-fact:nth-child(2n){border-right:none;padding-right:0}
  .who-fact b{font-size:38px}
  .who-cred{font-size:9px;line-height:1.7}
  .who-people{gap:12px}
  .who-person figcaption b{font-size:14px}
  .who-person figcaption span{font-size:9px}
  .who-note{font-size:9.5px}
  .diagnosis{padding:78px 0 86px}
  .diag-head{padding-bottom:26px}
  .diag-head h2{font-size:36px}
  .diag-line{grid-template-columns:1fr;border-top:none;border-left:1px solid var(--ink);padding-left:24px}
  .diag-item{min-height:0;padding:24px 0;border-right:none;border-bottom:1px solid var(--line)}
  .diag-line .diag-item{padding-left:0}
  .diag-item .dot{left:-28px;top:32px}
  .diag-item p{font-size:16px;max-width:none}
  .diag-item .go{padding-top:12px}
  .diag-foot{flex-wrap:wrap;gap:12px;margin-top:26px}
  .method{padding:78px 0 86px}
  .timeline{padding-left:20px}
  .tl-item{grid-template-columns:44px 1fr;gap:14px;padding:18px 0}
  .tl-item .no{font-size:30px}
  .tl-item .deliver{grid-column:2;text-align:left;padding-top:8px;white-space:normal}
  .catalog{padding:78px 0 86px}
  .cat-row{grid-template-columns:26px 1fr 72px 14px;gap:10px;padding:16px 0}
  .cat-row .count{display:none}
  .cat-row h3{font-size:22px}
  .cat-row p{font-size:10.5px}
  .cat-thumb{width:72px;height:50px}
  .results{padding:74px 0 80px}
  .res-head{grid-template-columns:1fr;gap:16px;padding-bottom:24px}
  .res-grid{grid-template-columns:1fr}
  .res-grid .res-item{padding:24px 0;border-right:none;border-bottom:1px solid #2e2e2e}
  .res-item:nth-child(2),.res-item:nth-child(3){border-bottom:1px solid #2e2e2e}
  .res-item:nth-child(4){border-bottom:none}
  .res-num{font-size:46px}
  .cases{padding:78px 0 86px}
  .case-main h3{font-size:22px}
  .case-main .result{font-size:19px}
  .case-small{grid-template-columns:1fr;gap:12px}
  .case-small figure{order:-1}
  .case-small h3{font-size:16px}
  .case-side{gap:20px}
  .case-main{min-height:0;height:auto;display:flex;flex-direction:column;overflow:visible;background:#fff}
  .case-main figure{position:relative;inset:auto;aspect-ratio:4/3;flex:none}
  .case-main::after{display:none}
  .case-copy{position:static;padding:0;color:var(--ink)}
  .case-copy .hc-meta{padding:14px 0 10px;border-bottom:1px solid var(--line)}
  .case-copy .hc-meta span{color:var(--red)}
  .case-copy .hc-meta i{color:var(--ink-3)}
  .case-copy h3{color:var(--ink);font-size:22px}
  .case-copy .result{color:var(--ink);border-top:1px solid var(--line-2);font-size:19px}
  .case-copy .result span{color:var(--ink-3)}
  .case-copy .go{color:var(--red)}
}

/* 主案例：图底叠字，右栏与左图等高 */
.case-main::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 32%,rgba(0,0,0,.72) 68%,rgba(0,0,0,.92) 100%);pointer-events:none}
.case-copy{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:32px 32px 28px;color:#fff}
.case-copy .hc-meta{padding:0 0 10px;border-bottom:1px solid rgba(255,255,255,.22)}
.case-copy .hc-meta span{color:#ffb27a}
.case-copy .hc-meta i{color:rgba(255,255,255,.56)}
.case-copy h3{margin-top:12px;color:#fff;font-size:24px;line-height:1.55}
.case-copy .result{margin-top:12px;padding-top:12px;border-top:1px solid rgba(255,255,255,.2);color:#fff;font-size:20px}
.case-copy .result span{color:rgba(255,255,255,.62)}
.case-copy .go{color:#ffb27a}
.case-copy .go i{display:inline-block;transition:transform .3s var(--ease)}
.case-main:hover .case-copy .go i{transform:translateX(4px)}
.case-main:hover img{transform:scale(1.03)}

/* 封面慢推 + 文字入场 */
.cover-bg.on{animation:coverZoom 18s ease-out both}
.cover-kicker,.cover h1,.cover-foot{animation:coverUp 1s var(--ease) both}
.cover h1{animation-delay:.12s}
.cover-foot{animation-delay:.22s}
@keyframes coverZoom{from{transform:scale(1.055)}to{transform:scale(1)}}
@keyframes coverUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.cover-bg,.cover-kicker,.cover h1,.cover-foot{animation:none}}

/* 滚动进度条 */
body.home .head::after{content:"";position:absolute;left:0;bottom:-1px;height:2px;width:calc(var(--sp,0) * 100%);background:var(--grad-brand);transition:width .12s linear}

/* 红点诊断的交互 */
.diag-item .dot{transition:transform .3s var(--ease),box-shadow .3s}
.diag-item:hover .dot{transform:scale(1.25);box-shadow:0 0 0 6px rgba(224,11,22,.1)}

/* 移动端主案例：图片在上，文字回到白底，避免压图 */
@media(max-width:760px){
  .case-main{min-height:0;height:auto;display:flex;flex-direction:column;overflow:visible;background:#fff}
  .case-main figure{position:relative;inset:auto;aspect-ratio:4/3;flex:none}
  .case-main::after{display:none}
  .case-copy{position:static;padding:0;color:var(--ink)}
  .case-copy .hc-meta{padding:14px 0 10px;border-bottom:1px solid var(--line)}
  .case-copy .hc-meta span{color:var(--red)}
  .case-copy .hc-meta i{color:var(--ink-3)}
  .case-copy h3{color:var(--ink);font-size:22px}
  .case-copy .result{color:var(--ink);border-top:1px solid var(--line-2);font-size:19px}
  .case-copy .result span{color:var(--ink-3)}
  .case-copy .go{color:var(--red)}
}


@media(max-width:760px){
  .cover-bg{object-position:82% 30%}
  .cover::after{background:
    linear-gradient(180deg,rgba(255,255,255,.5) 0%,rgba(255,255,255,.06) 18%,rgba(255,255,255,0) 32%,rgba(255,255,255,.86) 52%,rgba(255,255,255,.98) 70%,#fff 100%),
    linear-gradient(90deg,rgba(255,255,255,.45) 0%,rgba(255,255,255,.1) 55%,rgba(255,255,255,0) 80%)}
}