/* 激光熔覆服务 | jiguangrongfu.com | 纯静态样式，无外部依赖 */
:root{
  --navy:#0b2236;
  --navy-2:#12354f;
  --blue:#1a5c8a;
  --blue-light:#e8f1f8;
  --orange:#ff7a18;
  --orange-2:#ffab3d;
  --ink:#1b2b38;
  --muted:#617487;
  --line:#e2e9ef;
  --bg:#f6f8fa;
  --white:#fff;
  --r:14px;
  --shadow:0 10px 32px rgba(11,34,54,.09);
  --shadow-lg:0 20px 50px rgba(11,34,54,.16);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--white);color:var(--ink);font:16px/1.75 "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--orange)}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.01em}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.container{width:min(1200px,calc(100% - 40px));margin:0 auto}
.text-center{text-align:center}
.mt-30{margin-top:30px}
.mt-16{margin-top:16px}

/* ---------- 顶部条 / 导航 ---------- */
.topbar{background:#081c2d;color:#b8c9d7;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:38px}
.top-slogan{letter-spacing:.02em}
.top-phone{color:#fff;font-weight:700;white-space:nowrap}
.top-phone b{color:var(--orange-2);font-size:15px;letter-spacing:.03em}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:11px;background:linear-gradient(140deg,var(--navy-2),var(--blue));display:grid;place-items:center;box-shadow:0 5px 14px rgba(26,92,138,.25)}
.brand-mark svg{width:26px;height:26px}
.brand-text strong{display:block;font-size:20px;letter-spacing:.04em;color:var(--navy);line-height:1.2}
.brand-text span{display:block;font-size:11px;color:var(--muted);letter-spacing:.16em;text-transform:uppercase}
.nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{display:block;padding:9px 11px;font-size:14.5px;font-weight:600;color:#31475a;border-radius:8px;white-space:nowrap}
.nav-link:hover{background:var(--blue-light);color:var(--blue)}
.nav-link.active{color:var(--orange);background:#fff3e8}
.nav-cta{display:inline-flex;align-items:center;gap:7px;padding:10px 17px;margin-left:10px;border-radius:9px;background:var(--orange);color:#fff;font-size:14.5px;font-weight:700;white-space:nowrap;box-shadow:0 5px 14px rgba(255,122,24,.28)}
.nav-cta:hover{background:#ef6a06;color:#fff;transform:translateY(-1px)}
.nav-cta-menu{display:none}
.nav-toggle{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:9px;font-size:20px;cursor:pointer;color:var(--navy)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 25px;border-radius:9px;font-size:15.5px;font-weight:700;transition:.2s;border:1.5px solid transparent;white-space:nowrap}
.btn-lg{padding:15px 30px;font-size:16.5px}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 20px rgba(255,122,24,.28)}
.btn-primary:hover{background:#ef6a06;color:#fff;transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.05)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-outline{border-color:var(--blue);color:var(--blue);background:transparent}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-outline-dark{border-color:rgba(255,255,255,.6);color:#fff}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#091d2f 0%,#103451 58%,#164a6f 100%);color:#fff;padding:74px 0 84px}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:52px 52px;mask-image:linear-gradient(90deg,rgba(0,0,0,.6),transparent 75%)}
.hero:after{content:"";position:absolute;right:-120px;top:-160px;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(255,122,24,.18),transparent 68%)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:700;letter-spacing:.1em;color:var(--orange-2);border:1px solid rgba(255,171,61,.45);background:rgba(255,171,61,.08);padding:7px 15px;border-radius:30px;margin-bottom:24px}
.hero-eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(255,122,24,.2)}
.hero h1{font-size:clamp(31px,3.9vw,52px);line-height:1.28;letter-spacing:.01em}
.hero h1 .accent{color:var(--orange-2)}
.hero-lead{margin:22px 0 30px;font-size:16.5px;line-height:1.95;color:#c8d9e7;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:48px;padding-top:26px;border-top:1px solid rgba(255,255,255,.16)}
.stat-num{display:block;font-size:22px;font-weight:800;color:#fff;line-height:1.3}
.stat-num em{font-style:normal;color:var(--orange-2)}
.stat-label{font-size:12.5px;color:#a8bfd0;letter-spacing:.02em}
.hero-visual{position:relative}
.hero-img{width:100%;aspect-ratio:4/4.35;object-fit:cover;object-position:center 52%;border-radius:18px;border:1px solid rgba(255,255,255,.18);box-shadow:var(--shadow-lg)}
.hero-float{position:absolute;left:-26px;bottom:32px;background:#fff;color:var(--ink);border-radius:12px;padding:14px 18px;box-shadow:var(--shadow-lg);max-width:230px}
.hero-float strong{display:block;font-size:14px;color:var(--navy)}
.hero-float span{font-size:12.5px;color:var(--muted);line-height:1.6}
.hero-float .dot{display:inline-block;width:8px;height:8px;background:#28b473;border-radius:50%;margin-right:6px}
.hero-badge{position:absolute;right:-14px;top:24px;background:var(--orange);color:#fff;font-size:12.5px;font-weight:700;padding:9px 14px;border-radius:8px;transform:rotate(4deg);box-shadow:0 8px 20px rgba(255,122,24,.35)}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section-alt{background:var(--bg)}
.section-head{max-width:780px;margin:0 auto 48px}
.section-head .eyebrow{display:block;color:var(--orange);font-size:13px;font-weight:800;letter-spacing:.18em;margin-bottom:12px}
.section-head h2{font-size:clamp(25px,2.7vw,36px);color:var(--navy)}
.section-head p{color:var(--muted);font-size:16px;margin-top:14px}
.section-head .eyebrow:before{content:"";display:inline-block;width:22px;height:2px;background:var(--orange);vertical-align:middle;margin-right:9px}
.section-blue{background:linear-gradient(120deg,#0d2b42,#164a6f);color:#fff;padding:76px 0}
.section-blue h2{color:#fff}
.section-blue .section-sub{color:#c4d6e4}

/* ---------- 服务卡片 ---------- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 26px 28px;transition:.25s;position:relative;overflow:hidden}
.service-card:before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:linear-gradient(90deg,var(--orange),var(--orange-2));transform:scaleX(0);transform-origin:left;transition:.3s}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cfe0ec}
.service-card:hover:before{transform:scaleX(1)}
.service-icon{width:52px;height:52px;border-radius:12px;background:var(--blue-light);display:grid;place-items:center;margin-bottom:20px}
.service-icon svg{width:28px;height:28px;stroke:var(--blue)}
.service-card h3{font-size:19px;color:var(--navy);margin-bottom:11px}
.service-card p{font-size:14px;color:var(--muted);line-height:1.85;margin:0}
.service-num{position:absolute;right:20px;top:16px;font-size:38px;font-weight:800;color:#eef3f7;line-height:1}

/* ---------- 实拍案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.case-item{grid-column:span 2;position:relative;display:block;overflow:hidden;border-radius:var(--r);background:#0d2438;box-shadow:var(--shadow)}
.case-item:nth-child(4),.case-item:nth-child(5){grid-column:span 3}
.case-item img{width:100%;height:100%;aspect-ratio:4/3.15;object-fit:cover;object-position:center 50%;transition:transform .5s}
.case-item:nth-child(4) img,.case-item:nth-child(5) img{aspect-ratio:16/8.4}
.case-item:hover img{transform:scale(1.05)}
.case-item:after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(6,22,36,.92) 0%,rgba(6,22,36,.42) 38%,rgba(6,22,36,0) 68%)}
.case-caption{position:absolute;z-index:2;left:0;right:0;bottom:0;padding:20px 22px;color:#fff}
.case-tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.08em;color:#fff;background:rgba(255,122,24,.92);padding:3px 10px;border-radius:5px;margin-bottom:9px}
.case-title{font-size:17px;font-weight:700;line-height:1.45}
.case-desc{font-size:12.8px;color:#c6d7e4;margin-top:5px;line-height:1.6}
.case-zoom{position:absolute;z-index:3;right:16px;top:16px;width:34px;height:34px;border-radius:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.4);color:#fff;display:grid;place-items:center;font-size:18px}
.cases-note{display:flex;align-items:center;gap:9px;justify-content:center;color:var(--muted);font-size:14px;margin-top:26px}
.cases-note:before{content:"";width:8px;height:8px;border-radius:50%;background:#28b473}

/* ---------- 案例详情页 ---------- */
.case-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.case-detail{display:grid;grid-template-columns:44% 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.case-detail:nth-child(5){grid-column:1/-1;grid-template-columns:32% 1fr}
.case-detail .case-media{overflow:hidden;background:#0d2438}
.case-detail img{width:100%;height:100%;min-height:270px;object-fit:cover;transition:transform .5s}
.case-detail:hover img{transform:scale(1.04)}
.case-body{padding:26px 28px}
.case-body .case-tag{background:#fff1e4;color:#d75c00}
.case-body h3{font-size:20px;color:var(--navy);margin:8px 0 12px}
.case-body p{font-size:14.5px;color:var(--muted);margin-bottom:12px}
.case-meta{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;border-top:1px dashed var(--line);padding-top:14px;margin-top:14px}
.case-meta div{font-size:13.5px;color:var(--muted)}
.case-meta b{color:var(--navy);font-weight:700}

/* ---------- 区域卡片 ---------- */
.region-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.region-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.region-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.region-head{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;padding:26px 26px 22px;position:relative}
.region-head h3{font-size:23px}
.region-head p{font-size:13.5px;color:#c1d4e3;margin:7px 0 0}
.region-no{position:absolute;right:22px;top:16px;font-size:40px;font-weight:800;color:rgba(255,255,255,.14);line-height:1}
.region-body{padding:24px 26px 26px;flex:1;display:flex;flex-direction:column}
.region-body>p{font-size:14.5px;color:var(--muted)}
.region-label{font-size:12.5px;font-weight:800;color:var(--blue);letter-spacing:.08em;margin:14px 0 10px}
.region-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tag{font-size:12.5px;color:#3f5b70;background:var(--bg);border:1px solid var(--line);padding:5px 11px;border-radius:6px}
.region-cities{font-size:13.5px;color:var(--muted);line-height:1.9;margin-bottom:20px}
.region-link{margin-top:auto;font-weight:700;color:var(--orange);font-size:14.5px}
.region-link:hover{color:#d75c00}

/* ---------- 优势 / 流程 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
.adv-num{font-size:14px;font-weight:800;color:var(--orange);letter-spacing:.1em;margin-bottom:12px}
.adv-card h3{font-size:18px;color:var(--navy);margin-bottom:9px}
.adv-card p{font-size:14px;color:var(--muted);margin:0}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.process-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px}
.process-step:not(:last-child):after{content:"→";position:absolute;right:-19px;top:44%;font-size:20px;color:var(--orange);font-weight:700;z-index:2}
.step-no{width:38px;height:38px;border-radius:10px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px;margin-bottom:16px}
.process-step h3{font-size:17.5px;color:var(--navy);margin-bottom:8px}
.process-step p{font-size:14px;color:var(--muted);margin:0}

/* ---------- 内页 ---------- */
.page-hero{background:linear-gradient(120deg,#0b2236,#164a6f);color:#fff;padding:54px 0 58px;position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;right:-100px;bottom:-220px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(255,122,24,.16),transparent 68%)}
.page-hero h1{font-size:clamp(27px,3vw,40px);position:relative;z-index:2}
.page-hero p{color:#c5d7e5;max-width:840px;margin-top:14px;font-size:16px;position:relative;z-index:2}
.breadcrumb{font-size:13px;color:#9fb8ca;margin-bottom:16px;position:relative;z-index:2}
.breadcrumb a{color:#c8dcea}
.breadcrumb span{margin:0 8px;color:#6f8ea4}
.panel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.panel-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
.panel h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.panel p{font-size:14.5px;color:var(--muted);margin:0}
.panel .pnum{display:inline-block;font-size:12px;font-weight:800;color:var(--orange);letter-spacing:.1em;margin-bottom:10px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split-media img{border-radius:var(--r);box-shadow:var(--shadow);width:100%;max-height:520px;object-fit:cover}
.split h2{font-size:clamp(24px,2.5vw,33px);color:var(--navy);margin-bottom:16px}
.split p{color:var(--muted);font-size:15.5px}
.check-list{margin-top:18px}
.check-list li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15px;color:#3a5265}
.check-list li:before{content:"✓";position:absolute;left:0;top:1px;width:18px;height:18px;border-radius:50%;background:#e6f6ee;color:#1a9e63;font-size:12px;font-weight:800;display:grid;place-items:center}
.data-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14.5px}
.data-table th,.data-table td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.data-table th{background:var(--blue-light);color:var(--navy);font-weight:700;white-space:nowrap}
.data-table tr:last-child td{border-bottom:0}
.data-table td{color:var(--muted)}
.note-box{background:#fff8f1;border-left:4px solid var(--orange);border-radius:8px;padding:18px 22px;color:#6c573f;font-size:14.5px;margin-top:24px}
.note-box strong{color:#b55500}
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.article-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 24px}
.article-item .a-tag{font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.06em}
.article-item h3{font-size:17px;color:var(--navy);margin:8px 0}
.article-item p{font-size:14px;color:var(--muted);margin:0}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 26px}
.contact-card .c-label{font-size:13px;font-weight:800;color:var(--blue);letter-spacing:.1em;margin-bottom:12px}
.contact-card .c-big{font-size:27px;font-weight:800;color:var(--orange);line-height:1.4;letter-spacing:.02em}
.contact-card .c-big a{color:var(--orange)}
.contact-card p{font-size:14px;color:var(--muted);margin-top:10px}
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 22px;font-weight:700;color:var(--navy);font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";font-size:22px;color:var(--orange);flex-shrink:0;line-height:1}
.faq-item[open] summary:after{content:"−"}
.faq-item[open] summary{color:var(--blue)}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:14.8px;line-height:1.9;border-top:1px solid var(--line)}
.faq-body p{margin:14px 0 0}

/* ---------- CTA / 页脚 ---------- */
.cta-band{background:linear-gradient(120deg,#ff7a18,#f2620a);color:#fff;padding:52px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.4vw,31px)}
.cta-inner p{font-size:15px;color:#ffe5d0;margin:8px 0 0}
.cta-phone{display:inline-flex;align-items:center;gap:10px;background:#fff;color:#d75c00;border-radius:10px;padding:15px 28px;font-size:21px;font-weight:800;box-shadow:0 10px 24px rgba(80,30,0,.18);white-space:nowrap}
.cta-phone:hover{color:#a64400;transform:translateY(-2px)}
.site-footer{background:#081c2d;color:#a8bdcd;padding:62px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:44px;padding-bottom:42px}
.footer-col h3{color:#fff;font-size:16px;margin-bottom:18px}
.footer-col p{line-height:1.9;margin-bottom:10px}
.footer-col a{display:block;margin-bottom:9px;color:#a8bdcd}
.footer-col a:hover{color:var(--orange-2)}
.footer-col .f-phone{font-size:22px;font-weight:800;color:var(--orange-2);display:inline-block;margin:4px 0 10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.11);padding:20px 0 26px;font-size:13px;color:#7f97a9}
.footer-bottom .fb-inner{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.beian a{color:#a8bdcd}
.beian a:hover{color:var(--orange-2)}
.back-top{position:fixed;right:20px;bottom:22px;z-index:55;width:44px;height:44px;border-radius:10px;border:0;background:var(--navy);color:#fff;font-size:20px;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.25s}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--orange)}

/* ---------- 灯箱 ---------- */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(4,16,26,.94);display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.open{display:flex}
.lightbox img{max-width:min(94vw,900px);max-height:88vh;object-fit:contain;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;right:26px;top:22px;width:42px;height:42px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.08);color:#fff;font-size:24px;cursor:pointer;line-height:1}
.lightbox-cap{position:absolute;bottom:20px;left:0;right:0;text-align:center;color:#c8d9e7;font-size:14px}

/* ---------- 动效：内容默认可见，进入视口才播放动画（绝不白屏） ---------- */
@keyframes fadeUp{from{opacity:.4;transform:translateY(16px)}to{opacity:1;transform:none}}
html.js .reveal.in{animation:fadeUp .6s ease}
@media (prefers-reduced-motion:reduce){html.js .reveal.in{animation:none}}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .nav-link{padding:9px 7px;font-size:13.5px}
  .nav-cta{padding:9px 12px;margin-left:4px;font-size:13.5px}
  .brand-text strong{font-size:18px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .case-item:nth-child(4) img,.case-item:nth-child(5) img{aspect-ratio:16/9}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .header-inner{min-height:66px;flex-wrap:wrap}
  .nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none;padding:10px 20px 18px;margin:0}
  .nav.open{display:block}
  .nav-list{display:block}
  .nav-link{padding:11px 8px;border-bottom:1px solid #f0f4f7;font-size:15px}
  .header-inner > .nav-cta{display:none}
  .nav .nav-cta-menu{display:flex;margin:14px 0 0;justify-content:center}
  .nav{margin-left:0}
  .hero{padding:54px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-visual{max-width:520px;margin:0 auto;width:100%}
  .hero-img{aspect-ratio:16/11;object-position:center 55%}
  .hero-float{left:12px;bottom:14px}
  .hero-badge{right:8px;top:12px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px;margin-top:34px}
  .section{padding:62px 0}
  .section-head{margin-bottom:36px}
  .region-grid,.adv-grid,.contact-grid,.panel-grid-3{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .process-step:nth-child(2):after{display:none}
  .split{grid-template-columns:1fr;gap:26px}
  .case-detail-grid{grid-template-columns:1fr}
  .case-detail:nth-child(5){grid-template-columns:44% 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:640px){
  .container{width:calc(100% - 28px)}
  .topbar{font-size:11.5px}
  .top-slogan{display:none}
  .topbar-inner{justify-content:flex-end;min-height:34px}
  .brand-text strong{font-size:17px}
  .brand-text span{font-size:10px;letter-spacing:.08em}
  .hero h1{font-size:29px}
  .hero-lead{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .stat-num{font-size:19px}
  .service-grid,.region-grid,.adv-grid,.contact-grid,.panel-grid,.panel-grid-3,.article-list{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr}
  .process-step:after{display:none!important}
  .case-grid{grid-template-columns:1fr;gap:14px}
  .case-item,.case-item:nth-child(4),.case-item:nth-child(5){grid-column:span 1}
  .case-item img,.case-item:nth-child(4) img,.case-item:nth-child(5) img{aspect-ratio:4/3}
  .case-detail,.case-detail:nth-child(5){grid-template-columns:1fr}
  .case-detail img{min-height:0;aspect-ratio:4/3}
  .case-meta{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom .fb-inner{flex-direction:column;gap:8px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-phone{width:100%;justify-content:center;font-size:19px}
  .data-table{font-size:13px;display:block;overflow-x:auto;white-space:nowrap}
  .section{padding:52px 0}
  .section-blue{padding:54px 0}
}

/* ---------- 补充实拍画廊（熔覆层成品 + 现场视频截帧） ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.gallery-item{grid-column:span 2;position:relative;display:block;overflow:hidden;border-radius:var(--r);background:#0d2438;box-shadow:var(--shadow)}
.gallery-item.wide{grid-column:span 3}
.gallery-item img{width:100%;aspect-ratio:4/3;object-fit:cover;object-position:center 48%;transition:transform .5s}
.gallery-item.wide img{aspect-ratio:3/2}
.gallery-item.portrait img{object-position:center 38%}
.gallery-item:hover img{transform:scale(1.05)}
.gallery-item:after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(6,22,36,.92) 0%,rgba(6,22,36,.4) 40%,rgba(6,22,36,0) 70%)}
.gallery-cap{position:absolute;z-index:2;left:0;right:0;bottom:0;padding:18px 20px;color:#fff}
.gallery-cap .case-tag{margin-bottom:8px}
.gallery-cap .case-title,.gallery-cap .case-desc{display:block}
.gallery-subhead{text-align:center;color:var(--navy);font-size:21px;margin:44px 0 20px}
.gallery-subhead:before{content:"";display:inline-block;width:22px;height:2px;background:var(--orange);vertical-align:middle;margin-right:10px}
.gallery-note{max-width:900px;margin:26px auto 0;text-align:center;color:var(--muted);font-size:14px;line-height:1.9}
@media (max-width:900px){.gallery-grid{grid-template-columns:repeat(2,1fr)}.gallery-item,.gallery-item.wide{grid-column:span 1}.gallery-item.wide img{aspect-ratio:4/3}.gallery-subhead{margin:34px 0 16px}}
@media (max-width:640px){.gallery-grid{grid-template-columns:1fr;gap:14px}.gallery-item,.gallery-item.wide{grid-column:span 1}.gallery-item img,.gallery-item.wide img{aspect-ratio:4/3}.gallery-subhead{font-size:18px}}

/* 内孔截帧：取偏下画面，让齿圈与内壁熔覆带更完整 */
.gallery-item img[src*="cladding-gear-bore"]{object-position:center 46%}