/* ============================================================
   道为技术 DAOWE TECHNOLOGY · 官网样式
   品牌红：#C92A30 / 墨黑：#0D1420
   ============================================================ */

:root{
  --red:#C92A30;
  --red-bright:#E6343A;
  --red-deep:#9E1D23;
  --ink:#0D1420;
  --ink-2:#141D2B;
  --ink-3:#1B2637;
  --paper:#F5F6F8;
  --white:#FFFFFF;
  --text:#2A3441;
  --muted:#64707E;
  --line:#E4E7EC;
  --font-display:"Barlow Condensed","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Segoe UI",Arial,sans-serif;
  --shadow:0 10px 30px rgba(13,20,32,.08);
  --shadow-lg:0 20px 50px rgba(13,20,32,.14);
  --radius:14px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html:focus-within{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--red);color:#fff}

.container{width:min(1200px,92%);margin-inline:auto}

/* 跳过链接 */
.skip-link{
  position:absolute;left:-999px;top:0;z-index:200;
  background:var(--red);color:#fff;padding:10px 18px;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0}

/* ============ 图标 ============ */
.icon-svg{width:26px;height:26px;display:block}
.contact-icon .icon-svg{width:28px;height:28px}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(13,20,32,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .3s ease;
}
.site-header.scrolled{background:rgba(13,20,32,.92);box-shadow:0 6px 24px rgba(0,0,0,.25)}
.header-inner{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand-logo{height:44px;width:auto}

.main-nav{display:flex;gap:6px;margin-inline:auto}
.nav-link{
  position:relative;
  padding:8px 14px;
  color:rgba(255,255,255,.88);
  font-size:15px;
  font-weight:500;
  transition:color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--red-bright);transform:scaleX(0);transform-origin:left;transition:transform .25s;
}
.nav-link:hover,.nav-link.is-active{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:14px}
.lang-switch{
  display:flex;align-items:center;gap:6px;
  background:transparent;border:1px solid rgba(255,255,255,.35);
  color:#fff;font-size:13px;font-weight:600;
  padding:6px 12px;border-radius:99px;transition:all .2s;
}
.lang-switch:hover{border-color:var(--red-bright);background:rgba(230,52,58,.15)}
.lang-switch .lang-sep{opacity:.4;font-weight:400}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-body);font-size:15px;font-weight:600;
  padding:12px 28px;border-radius:8px;border:1px solid transparent;
  transition:all .25s ease;text-align:center;
}
.btn-small{padding:8px 18px;font-size:14px}
.btn-lg{padding:15px 40px;font-size:16px}
.btn-block{width:100%}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-deep);transform:translateY(-2px);box-shadow:0 10px 24px rgba(201,42,48,.35)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-outline{background:transparent;color:var(--red);border-color:var(--red)}
.btn-outline:hover{background:var(--red);color:#fff}

/* 汉堡按钮 */
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;background:transparent;border:1px solid rgba(255,255,255,.3);
  border-radius:8px;padding:9px;
}
.nav-toggle span{display:block;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05)}
.hero-shade{
  position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(13,20,32,.92) 0%,rgba(13,20,32,.78) 42%,rgba(13,20,32,.45) 100%);
}
.grid-tex{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 30% 40%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 40%,#000 30%,transparent 75%);
}
.hero-inner{position:relative;z-index:2;padding-top:120px;padding-bottom:60px}
.hero-eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-display);font-size:16px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.75);
}
.bevel{
  width:34px;height:10px;flex-shrink:0;display:inline-block;
  background:var(--red-bright);
  clip-path:polygon(0 0,78% 0,100% 50%,78% 100%,0 100%,22% 50%);
}
.hero-title{
  font-family:var(--font-body);font-weight:900;font-size:clamp(40px,6vw,72px);
  line-height:1.18;margin:26px 0 24px;letter-spacing:.01em;
}
.hero-title .accent{color:var(--red-bright)}
.hero-sub{max-width:620px;font-size:clamp(15px,1.6vw,18px);color:rgba(255,255,255,.85);font-weight:300}
.hero-cta{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap}

.hero-stats{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);overflow:hidden;
  margin-bottom:52px;
}
.stat{background:rgba(13,20,32,.72);padding:26px 20px;display:flex;flex-direction:column;gap:4px;text-align:center;backdrop-filter:blur(6px)}
.stat-num{font-family:var(--font-display);font-size:clamp(30px,3.6vw,44px);font-weight:700;color:#fff;line-height:1}
.stat-label{font-size:13px;color:rgba(255,255,255,.72);letter-spacing:.06em}

/* ============ 通用区块 ============ */
.section{padding:96px 0;position:relative;overflow:hidden}
.section-light{background:var(--white)}
.section-dark{background:var(--ink);color:#fff}
.section-dark .section-desc{color:rgba(255,255,255,.7)}
.section-center{text-align:center;margin-top:48px}
.section-head{max-width:720px;margin-bottom:56px}
.section-head.center{margin-inline:auto;text-align:center}
.section-eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-display);font-size:14px;font-weight:600;
  letter-spacing:.26em;text-transform:uppercase;color:var(--red);
  margin-bottom:14px;
}
.section-title{font-size:clamp(28px,3.4vw,40px);font-weight:900;color:var(--text);line-height:1.25}
.section-dark .section-title{color:#fff}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px;font-weight:300}

/* ============ 产品线卡片 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cat-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .3s ease,box-shadow .3s ease;
}
.cat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.cat-img{aspect-ratio:4/3;overflow:hidden}
.cat-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.cat-card:hover .cat-img img{transform:scale(1.06)}
.cat-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:8px;flex:1}
.cat-en{font-family:var(--font-display);font-size:13px;font-weight:600;letter-spacing:.24em;color:var(--red)}
.cat-body h3{font-size:22px;font-weight:900;color:var(--text)}
.cat-body p{color:var(--muted);font-size:14.5px;font-weight:300}
.cat-more{margin-top:auto;padding-top:14px;color:var(--red);font-weight:600;font-size:14px}

/* ============ 核心能力 ============ */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cap-item{
  background:var(--ink-2);border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);padding:34px 28px;
  position:relative;transition:transform .3s,border-color .3s;
}
.cap-item:hover{transform:translateY(-6px);border-color:rgba(230,52,58,.55)}
.cap-item::before{
  content:"";position:absolute;top:0;left:28px;right:28px;height:3px;
  background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .35s;
}
.cap-item:hover::before{transform:scaleX(1)}
.cap-icon{
  width:56px;height:56px;border-radius:12px;
  background:rgba(230,52,58,.14);display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;color:var(--red-bright);
}
.cap-item h3{color:#fff;font-size:19px;font-weight:700;margin-bottom:10px}
.cap-item p{color:rgba(255,255,255,.66);font-size:14.5px;font-weight:300}

/* ============ 案例卡片 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.case-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s;
}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.case-img{aspect-ratio:3/2;overflow:hidden;position:relative}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-img img{transform:scale(1.06)}
.case-tag{
  position:absolute;top:14px;left:14px;z-index:2;
  background:var(--red);color:#fff;font-size:12.5px;font-weight:600;
  padding:5px 14px;border-radius:99px;letter-spacing:.04em;
}
.case-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:19px;font-weight:900;color:var(--text)}
.case-body p{color:var(--muted);font-size:14.5px;font-weight:300}
.case-metrics{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:14px}
.case-metric{
  font-size:12.5px;font-weight:600;color:var(--red);
  background:rgba(201,42,48,.08);border:1px solid rgba(201,42,48,.2);
  padding:4px 12px;border-radius:99px;
}
.case-grid-full{grid-template-columns:repeat(3,1fr)}

/* ============ CTA 横幅 ============ */
.cta-band{
  position:relative;background:var(--ink);color:#fff;
  padding:80px 0;text-align:center;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  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:56px 56px;
}
.cta-band::after{
  content:"";position:absolute;left:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(230,52,58,.28),transparent 65%);
}
.cta-inner{position:relative;z-index:2}
.cta-inner h2{font-size:clamp(26px,3.2vw,38px);font-weight:900;margin-bottom:12px}
.cta-inner p{color:rgba(255,255,255,.7);font-weight:300;margin-bottom:32px}
.cta-band-slim{padding:64px 0}

/* ============ 内页 Banner ============ */
.page-banner{position:relative;min-height:46vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.page-banner-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.page-banner-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,20,32,.72) 0%,rgba(13,20,32,.55) 60%,rgba(13,20,32,.9) 100%)}
.page-banner-inner{position:relative;z-index:2;padding-bottom:56px}
.page-banner h1{font-size:clamp(32px,4.4vw,52px);font-weight:900;margin:16px 0 10px}
.page-banner p{font-weight:300;color:rgba(255,255,255,.82);font-size:17px}

/* ============ 板块建设中占位 ============ */
.coming-soon{
  max-width:640px;margin-inline:auto;text-align:center;
  padding:80px 40px;border:1px dashed var(--line);border-radius:var(--radius);
  background:var(--paper);
}
.coming-soon-icon{
  width:76px;height:76px;margin:0 auto 26px;border-radius:18px;
  background:rgba(201,42,48,.1);color:var(--red);
  display:flex;align-items:center;justify-content:center;
}
.coming-soon-icon .icon-svg{width:36px;height:36px}
.coming-soon h2{
  font-size:clamp(24px,3vw,32px);font-weight:900;color:var(--text);
  letter-spacing:.08em;
}
.coming-soon p{margin-top:14px;color:var(--muted);font-weight:300;font-size:15px}

/* ============ 公司介绍 ============ */
.about-intro{display:grid;grid-template-columns:1fr 1.15fr;gap:60px;align-items:center}
.about-img{position:relative}
.about-img img{border-radius:var(--radius);box-shadow:var(--shadow-lg);aspect-ratio:3/2.1;object-fit:cover}
.about-img-tag{
  position:absolute;left:-18px;bottom:26px;
  background:var(--red);color:#fff;font-size:14px;font-weight:600;
  padding:10px 20px;border-radius:8px;box-shadow:0 10px 24px rgba(201,42,48,.4);
}
.about-text h2{font-size:clamp(26px,3vw,36px);font-weight:900;color:var(--text);margin-bottom:18px}
.about-text>p{color:var(--muted);font-weight:300;margin-bottom:14px}
.about-text>p b{color:var(--text);font-weight:700}
.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.about-point{
  border:1px solid var(--line);border-left:3px solid var(--red);
  border-radius:10px;padding:16px 18px;background:var(--paper);
}
.about-point strong{display:block;font-size:15.5px;color:var(--text);font-weight:700}
.about-point span{font-size:13px;color:var(--muted)}

/* 时间线 */
.timeline{position:relative;max-width:860px;margin-inline:auto;padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--red),rgba(230,52,58,.15));
}
.tl-item{position:relative;padding:0 0 44px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--ink);border:3px solid var(--red-bright);
}
.tl-year{font-family:var(--font-display);font-size:26px;font-weight:700;color:var(--red-bright);line-height:1}
.tl-title{color:#fff;font-size:18px;font-weight:700;margin:8px 0 6px}
.tl-desc{color:rgba(255,255,255,.62);font-size:14.5px;font-weight:300}

/* 价值观 */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.value-item{text-align:center;padding:38px 22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);transition:transform .3s,box-shadow .3s}
.value-item:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.value-num{
  width:56px;height:56px;margin:0 auto 18px;border-radius:50%;
  background:var(--red);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:22px;font-weight:700;
}
.value-item h3{font-size:18px;font-weight:700;color:var(--text);margin-bottom:10px}
.value-item p{font-size:14px;color:var(--muted);font-weight:300}

/* ============ 产品中心 ============ */
.cat-tabs{
  display:flex;gap:10px;flex-wrap:wrap;margin-bottom:44px;
}
.cat-tab{
  background:var(--paper);border:1px solid var(--line);color:var(--text);
  font-size:15px;font-weight:600;padding:11px 24px;border-radius:99px;
  transition:all .22s;
}
.cat-tab:hover{border-color:var(--red);color:var(--red)}
.cat-tab.is-active{background:var(--red);border-color:var(--red);color:#fff}

.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.product-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s;
}
.product-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.product-img{aspect-ratio:4/3;overflow:hidden;position:relative}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .product-img img{transform:scale(1.06)}
.product-cat{
  position:absolute;top:14px;left:14px;
  background:rgba(13,20,32,.78);color:#fff;font-size:12.5px;font-weight:600;
  padding:5px 14px;border-radius:99px;letter-spacing:.03em;backdrop-filter:blur(4px);
}
.product-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:10px;flex:1}
.product-body h3{font-size:19px;font-weight:900;color:var(--text)}
.product-body .product-desc{color:var(--muted);font-size:14px;font-weight:300}
.spec-list{list-style:none;margin-top:6px;display:flex;flex-direction:column;gap:6px}
.spec-list li{
  position:relative;padding-left:18px;
  font-size:13.5px;color:var(--text);font-weight:400;
}
.spec-list li::before{
  content:"";position:absolute;left:0;top:8px;width:9px;height:9px;
  background:var(--red);clip-path:polygon(0 0,100% 50%,0 100%);
}

/* ============ 联系我们 ============ */
.contact-wrap{display:grid;grid-template-columns:1fr 1.3fr;gap:48px;align-items:start}
.contact-info{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-card{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--white);
  padding:26px 24px;transition:transform .3s,box-shadow .3s;
}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.contact-icon{
  width:50px;height:50px;border-radius:12px;background:rgba(201,42,48,.1);color:var(--red);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.contact-label{font-size:13px;color:var(--muted);letter-spacing:.05em}
.contact-value{font-size:17px;font-weight:700;color:var(--text);margin-top:2px;word-break:break-all}
.contact-note{font-size:12.5px;color:var(--muted);margin-top:6px}

.contact-form{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:40px;box-shadow:var(--shadow);
}
.contact-form h3{font-size:24px;font-weight:900;color:var(--text)}
.form-sub{color:var(--muted);font-size:14px;font-weight:300;margin:8px 0 28px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-field{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.form-field label{font-size:14px;font-weight:600;color:var(--text)}
.form-field input,.form-field textarea{
  font-family:var(--font-body);font-size:15px;color:var(--text);
  border:1px solid var(--line);border-radius:10px;padding:13px 16px;
  background:var(--paper);transition:border-color .2s,box-shadow .2s;resize:vertical;
}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--red);background:#fff;
  box-shadow:0 0 0 3px rgba(201,42,48,.12);
}
.form-field input.is-invalid,.form-field textarea.is-invalid{border-color:var(--red);box-shadow:0 0 0 3px rgba(201,42,48,.12)}
.form-success{
  margin-top:16px;padding:14px 18px;border-radius:10px;
  background:rgba(39,174,96,.1);border:1px solid rgba(39,174,96,.35);
  color:#1E7A45;font-size:14.5px;font-weight:600;
}

/* ============ 页脚 ============ */
.site-footer{background:#0A0F18;color:rgba(255,255,255,.72);padding:64px 0 30px;font-size:14.5px;font-weight:300}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand img{height:40px;margin-bottom:18px}
.footer-brand p{color:rgba(255,255,255,.55);max-width:280px}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px}
.footer-col a{display:block;margin-bottom:10px;transition:color .2s}
.footer-col a:hover{color:var(--red-bright)}
.footer-col p{margin-bottom:10px;color:rgba(255,255,255,.62)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding-top:26px;color:rgba(255,255,255,.42);font-size:13px;
}

/* ============ 滚动显现动画 ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-bg{transform:none}
  *{animation:none!important;transition:none!important}
}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
}

@media (min-width:901px) and (max-width:1240px){
  .header-inner{gap:10px}
  .nav-link{padding:8px 7px;font-size:14px}
  .brand-logo{height:38px}
  .header-cta{padding:8px 14px;font-size:13px}
  .lang-switch{padding:6px 9px}
}

@media (max-width:900px){
  .header-inner{gap:16px}
  .main-nav{
    position:fixed;top:72px;left:0;right:0;
    background:rgba(13,20,32,.97);
    flex-direction:column;padding:18px 6% 26px;gap:4px;
    transform:translateY(-130%);transition:transform .35s ease;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .main-nav.is-open{transform:translateY(0)}
  .nav-link{padding:14px 10px;font-size:17px;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .cat-grid,.case-grid,.case-grid-full,.product-grid{grid-template-columns:repeat(2,1fr)}
  .about-intro{grid-template-columns:1fr;gap:44px}
  .contact-wrap{grid-template-columns:1fr}
  .page-banner{min-height:40vh}
}

@media (max-width:600px){
  .section{padding:68px 0}
  .cat-grid,.case-grid,.case-grid-full,.product-grid{grid-template-columns:1fr}
  .cap-grid,.value-grid{grid-template-columns:1fr}
  .hero-title{font-size:clamp(34px,9vw,44px)}
  .hero-stats{grid-template-columns:1fr 1fr}
  .contact-info{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .contact-form{padding:26px 22px}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .lang-switch{display:none}
}

/* ============ 案例详情页 ============ */
.case-detail-hero{
  position:relative;min-height:52vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden;
}
.case-detail-hero-inner{position:relative;z-index:2;padding-bottom:52px}
.cd-back{
  display:inline-flex;align-items:center;gap:8px;
  color:rgba(255,255,255,.85);font-size:14.5px;font-weight:500;
  margin-bottom:26px;padding:8px 16px;border:1px solid rgba(255,255,255,.35);
  border-radius:99px;transition:all .2s;background:rgba(13,20,32,.35);
}
.cd-back:hover{color:#fff;border-color:#fff;background:rgba(13,20,32,.6)}
.cd-chev{width:15px;height:15px}
.cd-tag{
  display:inline-block;background:var(--red);color:#fff;
  font-size:13px;font-weight:600;padding:6px 16px;border-radius:99px;letter-spacing:.05em;
}
.cd-title{font-size:clamp(28px,3.8vw,44px);font-weight:900;margin:18px 0 18px;line-height:1.2}
.cd-metrics{display:flex;gap:12px;flex-wrap:wrap}
.cd-metric{
  font-size:14px;font-weight:700;color:var(--red-bright);
  background:rgba(13,20,32,.55);border:1px solid rgba(230,52,58,.5);
  padding:8px 18px;border-radius:99px;backdrop-filter:blur(4px);
}
.cd-body{max-width:880px;margin-inline:auto}
.cd-section{padding:10px 0 46px}
.cd-h2{
  display:flex;align-items:center;gap:14px;
  font-size:clamp(20px,2.4vw,26px);font-weight:900;color:var(--text);
  margin-bottom:20px;
}
.cd-h2 .bevel{width:30px;height:9px}
.cd-section>p{color:var(--muted);font-weight:300;line-height:1.9}
.cd-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.cd-list li{
  position:relative;padding-left:26px;color:var(--text);
  font-size:15.5px;line-height:1.8;font-weight:400;
}
.cd-list li::before{
  content:"";position:absolute;left:0;top:10px;width:12px;height:12px;
  background:var(--red);clip-path:polygon(0 0,100% 50%,0 100%);
}
.cd-steps{list-style:none;counter-reset:step;display:flex;flex-direction:column;gap:18px}
.cd-steps li{
  position:relative;padding-left:58px;counter-increment:step;min-height:44px;
  display:flex;align-items:center;
}
.cd-steps li::before{
  content:counter(step);
  position:absolute;left:0;top:0;width:40px;height:40px;flex-shrink:0;
  background:var(--red);color:#fff;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:19px;font-weight:700;
}
.cd-steps li p{color:var(--text);font-size:15.5px;line-height:1.75;font-weight:400}
.cd-values{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cd-value{
  display:flex;align-items:flex-start;gap:10px;
  background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--red);
  border-radius:10px;padding:18px 16px;font-size:15px;font-weight:600;color:var(--text);
}
.cd-value-dot{
  width:10px;height:10px;flex-shrink:0;margin-top:7px;border-radius:50%;
  background:var(--red);
}
.cd-products{display:flex;gap:10px;flex-wrap:wrap}
.cd-product-chip{
  font-size:14px;font-weight:600;color:var(--red);
  background:rgba(201,42,48,.08);border:1px solid rgba(201,42,48,.25);
  padding:8px 18px;border-radius:99px;transition:all .2s;
}
.cd-product-chip:hover{background:var(--red);color:#fff}
.case-more{
  margin-top:14px;color:var(--red);font-weight:600;font-size:14px;
  display:inline-flex;align-items:center;gap:6px;
}
.case-more::after{content:"";width:14px;height:2px;background:currentColor;transition:width .25s}
.case-card:hover .case-more::after{width:22px}
@media (max-width:700px){
  .cd-values{grid-template-columns:1fr}
  .cd-steps li{padding-left:50px}
  .cd-steps li::before{width:36px;height:36px;font-size:17px}
}

/* 表单错误提示 */
.form-error{
  background:rgba(201,42,48,.08);border-color:rgba(201,42,48,.35);
  color:var(--red-deep);
}


/* ============ 专利与软著墙 ============ */
.patent-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.patent-item{
  background:var(--ink-2);border:1px solid rgba(255,255,255,.08);border-radius:12px;
  padding:24px 20px;display:flex;flex-direction:column;gap:12px;
  transition:transform .3s ease,border-color .3s ease;
}
.patent-item:hover{transform:translateY(-4px);border-color:rgba(230,52,58,.5)}
.patent-badge{
  width:42px;height:42px;border-radius:10px;
  background:rgba(230,52,58,.14);color:var(--red-bright);
  display:flex;align-items:center;justify-content:center;
}
.patent-type{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--red-bright)}
.patent-item h4{color:rgba(255,255,255,.92);font-size:14.5px;font-weight:500;line-height:1.65}
@media (max-width:1100px){.patent-wall{grid-template-columns:repeat(3,1fr)}}
@media (max-width:700px){.patent-wall{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.patent-wall{grid-template-columns:1fr}}

/* ============ 专利与软著墙（小缩略图版） ============ */
.patent-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.patent-item{
  background:var(--ink-2);border:1px solid rgba(255,255,255,.08);border-radius:12px;
  padding:10px;display:flex;flex-direction:column;gap:10px;
  transition:transform .3s ease,border-color .3s ease;
}
.patent-item:hover{transform:translateY(-3px);border-color:rgba(230,52,58,.5)}
.patent-thumb{border-radius:6px;overflow:hidden;line-height:0;background:#000}
.patent-thumb img{width:100%;height:auto;display:block}
.patent-info{display:flex;flex-direction:column;gap:5px;padding:2px 6px 6px}
.patent-type{font-size:11.5px;font-weight:700;letter-spacing:.12em;color:var(--red-bright)}
.patent-item h4{color:rgba(255,255,255,.92);font-size:14px;font-weight:500;line-height:1.5}
.patent-ver{color:rgba(255,255,255,.45);font-weight:400;font-size:12.5px}
@media (max-width:1100px){.patent-wall{grid-template-columns:repeat(3,1fr)}}
@media (max-width:700px){.patent-wall{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.patent-wall{grid-template-columns:1fr}}

/* ============ 解决方案：铁路扣件机器人 ============ */
.section-white{background:var(--white)}
.section-ink{background:var(--ink);color:#fff}
.section-ink .sol-block-sub{color:rgba(255,255,255,.7)}
.sol-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.sol-hero-media img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-lg);object-fit:cover;aspect-ratio:16/9}
.sol-tags{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.sol-tags li{padding:7px 16px;border:1px solid rgba(201,42,48,.35);color:var(--red);border-radius:999px;font-size:13.5px;font-weight:500}
.sol-block-head{margin-bottom:40px}
.sol-block-title{font-size:clamp(24px,2.6vw,32px);font-weight:800;color:var(--text);line-height:1.3}
.sol-block-sub{margin-top:10px;color:var(--muted);font-weight:300;max-width:760px}
.sol-light .sol-block-title{color:#fff}
.sol-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sol-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.sol-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.sol-point{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px}
.sol-point h4{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--text)}
.sol-point p{color:var(--muted);font-weight:300;font-size:14.5px}
.sol-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;position:relative;transition:transform .3s ease,box-shadow .3s ease}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.sol-card-num{font-family:var(--font-display);font-size:30px;font-weight:700;color:rgba(201,42,48,.22);line-height:1;margin-bottom:14px}
.sol-card h4{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text)}
.sol-card p{color:var(--muted);font-weight:300;font-size:14px}
.sol-card-dark{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.12)}
.sol-card-dark:hover{background:rgba(255,255,255,.08)}
.sol-card-dark h4{color:#fff}
.sol-card-dark p{color:rgba(255,255,255,.65)}
.sol-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.sol-split-rev .sol-split-media{order:2}
.sol-split-media img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-lg);object-fit:cover;aspect-ratio:16/9}
.sol-list{list-style:none;margin-top:18px;display:flex;flex-direction:column;gap:16px}
.sol-list li{display:flex;flex-direction:column;gap:4px;padding-left:18px;border-left:3px solid var(--red)}
.sol-list strong{font-size:16px;font-weight:700;color:var(--text)}
.sol-list span{color:var(--muted);font-weight:300;font-size:14.5px}
.sol-card-std h4{margin-bottom:14px;font-size:17px;font-weight:700;color:var(--text)}
.sol-list-plain{list-style:none;display:flex;flex-direction:column;gap:10px}
.sol-list-plain li{padding:10px 14px;background:var(--white);border:1px solid var(--line);border-radius:10px;font-size:14.5px;color:var(--text)}
.sol-spec-sub{font-size:18px;font-weight:700;margin:36px 0 16px;color:var(--text)}
.sol-spec{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.sol-spec div{display:flex;flex-direction:column;padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:10px}
.sol-spec dt{font-size:13px;color:var(--muted);font-weight:400}
.sol-spec dd{font-size:15px;color:var(--text);font-weight:600;margin-top:3px}
.sol-cta{text-align:center;max-width:760px}
.sol-cta h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:#fff}
.sol-cta p{margin:14px 0 26px;color:rgba(255,255,255,.72);font-weight:300}
@media (max-width:900px){
  .sol-hero,.sol-split{grid-template-columns:1fr;gap:32px}
  .sol-split-rev .sol-split-media{order:0}
  .sol-grid-4{grid-template-columns:repeat(2,1fr)}
  .sol-spec{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  .sol-grid-3,.sol-grid-4,.sol-grid-2,.sol-spec{grid-template-columns:1fr}
}
/* ============ 新闻动态 ============ */
.news-list{display:grid;grid-template-columns:1fr;gap:24px;max-width:880px;margin:0 auto}
.news-card{display:block;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
a.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(230,52,58,.45)}
.news-card-placeholder{opacity:.85;border-style:dashed}
.news-tag{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--red);margin-bottom:12px}
.news-body h3{font-size:21px;font-weight:800;color:var(--text);margin-bottom:10px}
.news-body p{color:var(--muted);font-weight:300;font-size:15px;line-height:1.8}
.news-meta{display:flex;justify-content:space-between;align-items:center;margin-top:18px}
.news-date{font-size:13.5px;color:var(--muted)}
.news-more{font-size:14px;font-weight:600;color:var(--red)}
@media (max-width:600px){.news-card{padding:24px 22px}}
/* 深色区块卡片序号改为 logo 黄 */
.sol-card-dark .sol-card-num{color:#FCB300}