:root{
    --ink:#0a141b; --navy:#0e1e28; --navy-2:#142b38;
    --blue:#155a70; --blue-2:#1f8ba8; --blue-3:#3fb6cc;
    --cyan:#25c8e0; --cyan-2:#6fe3f2;
    --bg:#fff; --bg-2:#f5f7fa; --bg-3:#eef2f7;
    --line:#e2e7ee; --line-2:#d3dae4;
    --text:#1a2029; --text-2:#3d4652; --muted:#6b7684;
    --ok:#0f7b3f; --warn:#0e7285; --danger:#c0392b;
    --max:1080px; --radius:12px;
    --shadow:0 1px 2px rgba(16,38,60,.05),0 8px 24px rgba(16,38,60,.06);
    --shadow-lg:0 2px 6px rgba(16,38,60,.08),0 18px 48px rgba(16,38,60,.13);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
       color:var(--text);line-height:1.78;background:var(--bg);
       -webkit-font-smoothing:antialiased;overflow-wrap:break-word}
  img{max-width:100%;height:auto;display:block}
  a{color:var(--blue);text-decoration:none}
  a:hover{text-decoration:underline}
  :focus-visible{outline:3px solid var(--cyan);outline-offset:2px;border-radius:4px}
  .visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

  /* ===== 顶栏 ===== */
  .topbar{position:sticky;top:0;z-index:50;background:rgba(10,20,27,.88);
          backdrop-filter:blur(12px);border-bottom:1px solid rgba(111,227,242,.18)}
  .topbar-in{max-width:var(--max);margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:12px}
  .topbar img{width:36px;height:36px;border-radius:8px;flex:none;background:#fff;padding:2px}
  .tb-brand{display:flex;align-items:baseline;gap:8px;min-width:0}
  .tb-name{font-weight:700;color:#e8f6fa;font-size:1.02rem;letter-spacing:.5px;white-space:nowrap}
  .tb-sub{font-size:.72rem;color:#7fa2b0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .topbar nav{margin-left:auto;display:flex;gap:4px;font-size:.9rem;align-items:center}
  .topbar nav a{color:#b8cdd8;font-weight:500;padding:6px 10px;border-radius:6px;white-space:nowrap}
  .topbar nav a:hover{color:var(--cyan-2);background:rgba(37,200,224,.1);text-decoration:none}
  .tb-tel{margin-left:6px;background:var(--cyan);color:#062530!important;padding:7px 15px;border-radius:20px;font-weight:700}
  .tb-tel:hover{background:var(--cyan-2);text-decoration:none!important}

  /* ===== Hero ===== */
  header.hero{position:relative;overflow:hidden;color:#fff;
       background:linear-gradient(135deg,var(--ink) 0%,var(--navy) 45%,#16323f 100%);padding:0}
  header.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:46px 46px;pointer-events:none}
  header.hero::after{content:"";position:absolute;right:-140px;top:-140px;width:520px;height:520px;border-radius:50%;
       background:radial-gradient(circle,rgba(37,200,224,.16) 0%,rgba(37,200,224,0) 68%);pointer-events:none}
  .hero-in{position:relative;max-width:var(--max);margin:0 auto;padding:38px 20px 34px;
       display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:44px;align-items:center}
  .hero-logo{width:clamp(88px,12vw,112px);height:auto;margin-bottom:10px;border-radius:0;background:none;padding:0;
             filter:drop-shadow(0 12px 28px rgba(0,0,0,.5)) drop-shadow(0 0 26px rgba(64,210,255,.16))}
  .hero-eyebrow{display:inline-block;font-size:.78rem;letter-spacing:2px;color:var(--cyan-2);
       border:1px solid rgba(111,227,242,.42);border-radius:20px;padding:4px 14px;margin-bottom:10px;text-shadow:0 0 14px rgba(37,200,224,.3)}
  header.hero h1{font-size:clamp(1.5rem,4.4vw,2.15rem);letter-spacing:.5px;font-weight:700;line-height:1.32}
  header.hero h1 em{font-style:normal;color:var(--cyan-2);text-shadow:0 0 26px rgba(37,200,224,.45)}
  .hero-sub{margin-top:14px;color:#c3d4e4;font-size:clamp(.94rem,2.5vw,1.06rem);line-height:1.66}
  .hero-sub b{color:#fff;font-weight:600}
  .hero-tags{margin-top:15px;display:flex;flex-wrap:wrap;gap:8px}
  .hero-tags span{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.2);
       border-radius:16px;padding:5px 14px;font-size:.85rem;color:#e6eef6}
  .hero-cta{margin-top:19px;display:flex;gap:12px;flex-wrap:wrap}
  .btn{display:inline-block;padding:12px 28px;border-radius:26px;font-weight:600;font-size:.96rem;
       border:2px solid transparent;transition:.18s;cursor:pointer}
  .btn-main{background:var(--cyan);color:#062530;border-color:var(--cyan);box-shadow:0 6px 24px rgba(37,200,224,.38)}
  .btn-main:hover{background:var(--cyan-2);text-decoration:none;transform:translateY(-1px)}
  .btn-ghost{border-color:rgba(255,255,255,.42);color:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none;transform:translateY(-1px)}

  /* Hero 侧参数面板 */
  .hero-panel{background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.15);
       border-radius:16px;padding:22px;backdrop-filter:blur(6px)}
  .hero-panel h2{font-size:.86rem;color:var(--cyan-2);letter-spacing:1.5px;margin:0 0 14px;padding:0;border:none}
  .hp-row{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.15);font-size:.88rem}
  .hp-row:last-child{border-bottom:none}
  .hp-row span{color:#a9bfd2}
  .hp-row b{color:#fff;font-weight:600;text-align:right}
  .hp-note{margin-top:10px;font-size:.78rem;color:#93aac0;line-height:1.7}

  /* 承接范围行式（深色底通用） */
  .sc-row{display:flex;justify-content:space-between;align-items:baseline;gap:14px;
       padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.14)}
  .hero-panel .sc-row{padding:6px 0;font-size:.85rem}
  .sc-row:last-child{border-bottom:none}
  .hero-panel .sc-row:last-of-type{border-bottom:none}
  .sc-row b{color:var(--cyan-2);font-weight:700;white-space:nowrap;flex-shrink:0}
  .sc-row p{margin:0;color:#b8cdd8;font-size:.85rem;line-height:1.55;text-align:right}
  .hero-panel .hp-note{margin-top:12px}

  /* 车间实拍网格 */
  .kw{color:inherit;font-weight:600;border-bottom:1px dashed rgba(63,182,204,.55);text-decoration:none}
  .kw:hover{color:var(--blue-2);border-bottom-color:var(--blue-2);text-decoration:none}
  .card-more{display:inline-block;margin-top:9px;font-size:.86rem;font-weight:600;color:var(--blue-2)}
  .card-more:hover{color:var(--blue);text-decoration:underline}
  .line-head h3 a{color:inherit;text-decoration:none}
  .line-head h3 a:hover{color:var(--blue-2)}
  footer .svc-links{margin-top:14px;display:flex;flex-wrap:wrap;justify-content:center;gap:7px}
  footer .svc-links a{background:#fff;border:1px solid var(--line);border-radius:6px;
       padding:4px 11px;font-size:.83rem;color:var(--blue)}
  footer .svc-links a:hover{border-color:var(--blue-3);color:var(--blue-2);text-decoration:none}
  .gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px}
  .gallery figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;
       overflow:hidden;box-shadow:0 6px 18px rgba(10,20,27,.07);transition:transform .25s,box-shadow .25s}
  .gallery figure:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(10,20,27,.16)}
  .gallery img{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;background:#e8eef3}
  .gallery figcaption{padding:8px 13px;font-size:.82rem;color:var(--muted);line-height:1.5;
       border-top:1px solid var(--line)}
  @media(max-width:560px){.gallery{grid-template-columns:1fr}}
  /* 10 张图 3 列布局会剩 1 张孤行 —— 让它跨满整行作收官大图 */
  @media(min-width:721px){
    .gallery figure:last-child:nth-child(3n+1){grid-column:1/-1}
    .gallery figure:last-child:nth-child(3n+1) img{aspect-ratio:1080/380;object-position:center}
  }

  /* 设备区核心参数面板（浅色区用的深色版） */
  .param-panel{background:var(--ink);border:1px solid rgba(111,227,242,.18);border-radius:16px;
       padding:15px 22px 12px;margin-bottom:12px;box-shadow:0 16px 40px rgba(10,20,27,.22)}
  .param-panel h3{margin:0 0 8px;font-size:.86rem;color:var(--cyan-2);letter-spacing:1.5px;font-weight:700}
  .param-panel .hp-row{border-bottom-color:rgba(255,255,255,.14)}
  .pp-cols{display:grid;grid-template-columns:1fr 1fr;column-gap:48px}
  .pp-col .hp-row:last-child{border-bottom:none}
  @media(max-width:720px){
    .pp-cols{grid-template-columns:1fr;column-gap:0}
    .hero-panel .sc-row{flex-direction:column;align-items:flex-start;gap:3px;padding:9px 0}
    .hero-panel .sc-row p{text-align:left}
  }

  /* ===== 指标条 ===== */
  .stats{background:var(--navy);color:#fff;border-bottom:3px solid var(--cyan)}
  .stats-in{max-width:var(--max);margin:0 auto;padding:0 20px;display:grid;
       grid-template-columns:repeat(4,1fr)}
  .stat{padding:24px 16px;text-align:center;border-right:1px solid rgba(255,255,255,.1)}
  .stat:last-child{border-right:none}
  .stat b{display:block;font-size:clamp(1.5rem,4.5vw,2.1rem);font-weight:700;color:var(--cyan-2);line-height:1.2;letter-spacing:.5px}
  .stat span{display:block;margin-top:4px;font-size:.83rem;color:#9db3c8}

  /* ===== 内容区 ===== */
  .wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
  section{padding:30px 0;border-bottom:1px solid var(--line);scroll-margin-top:64px}
  section.alt{background:var(--bg-2)}
  .sec-head{margin-bottom:16px;max-width:820px}
  .sec-kicker{display:inline-block;font-size:.76rem;letter-spacing:2.5px;color:var(--cyan);
       font-weight:600;margin-bottom:8px}
  h2{color:var(--navy);font-size:clamp(1.2rem,3.4vw,1.5rem);line-height:1.4;letter-spacing:.3px}
  h2 .en{display:block;font-size:.72rem;letter-spacing:2px;color:var(--muted);font-weight:500;margin-top:4px}
  .sec-desc{margin-top:8px;color:var(--text-2);font-size:.97rem}
  h3{color:#222b36;font-size:1.03rem;margin:0 0 6px;line-height:1.55}
  p,li{font-size:.97rem}
  ul,ol{margin:8px 0 8px 24px}
  li{margin:5px 0}
  b{font-weight:600}

  /* 能力卡 */
  .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(238px,1fr));gap:12px}
  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;
       transition:.2s;position:relative;overflow:hidden}
  .card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--cyan);box-shadow:0 0 12px rgba(37,200,224,.7);
       transform:scaleY(0);transform-origin:top;transition:transform .25s}
  .card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:var(--line-2)}
  .card:hover::before{transform:scaleY(1)}
  .card-ico{width:36px;height:36px;border-radius:10px;background:linear-gradient(140deg,var(--navy),var(--blue-2));
       display:flex;align-items:center;justify-content:center;margin-bottom:9px}
  .card-ico svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
  .card b{color:var(--navy);display:block;margin-bottom:5px;font-size:1rem}
  .card p{font-size:.91rem;color:var(--text-2);line-height:1.62}
  .card .tag{display:inline-block;margin-top:9px;font-size:.78rem;color:var(--blue-2);
       background:var(--bg-3);border-radius:12px;padding:2px 10px}

  /* 产线分区 */
  .line-block{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
       box-shadow:var(--shadow);margin-top:18px}
  .line-head{display:flex;align-items:center;gap:14px;padding:18px 22px;
       background:linear-gradient(100deg,var(--navy),var(--navy-2));color:#fff}
  .line-head .n{width:38px;height:38px;border-radius:9px;background:rgba(37,200,224,.2);
       border:1px solid rgba(111,227,242,.45);display:flex;align-items:center;justify-content:center;
       font-weight:700;color:var(--cyan-2);font-size:1rem;flex:none}
  .line-head h3{color:#fff;margin:0;font-size:1.06rem}
  .line-head .lh-sub{color:#9db3c8;font-size:.83rem;font-weight:400}
  .line-body{padding:8px 22px 18px}
  .item{padding:15px 0;border-bottom:1px dashed var(--line)}
  .item:last-child{border-bottom:none}
  .item-t{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;margin-bottom:5px}
  .item-t strong{color:var(--navy);font-size:.98rem}
  .item-t .spec{color:var(--cyan);font-size:.84rem;font-weight:600}
  .item p{color:var(--text-2);font-size:.92rem;margin:0}
  .item .use{margin-top:6px;font-size:.85rem;color:var(--muted)}
  .item .use::before{content:"▸ ";color:var(--cyan)}

  /* 材质矩阵 */
  .mat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:11px;margin-top:12px}
  .mat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 15px}
  .mat h3{font-size:.95rem;color:var(--navy);display:flex;align-items:center;gap:8px;margin-bottom:10px}
  .mat h3::before{content:"";width:4px;height:15px;background:var(--cyan);border-radius:2px}
  .mat .pills{display:flex;flex-wrap:wrap;gap:6px}
  .mat .pills span{background:var(--bg-3);color:var(--blue);border-radius:6px;padding:3px 9px;font-size:.84rem;font-weight:500}
  .mat .note{font-size:.82rem;color:var(--muted);margin-top:9px}

  /* 深色反差区（杀手锏） */
  .dark{background:linear-gradient(140deg,var(--ink),var(--navy) 60%,#16323f);color:#fff;position:relative;overflow:hidden}
  .dark::before{content:"";position:absolute;inset:0;
       background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                        linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
       background-size:52px 52px;pointer-events:none}
  .dark .wrap{position:relative}
  .dark h2{color:#fff}
  .dark h2 .en{color:#7f9ab1}
  .dark .sec-desc{color:#b6c8d8}
  .dark .sec-kicker{color:var(--cyan-2)}
  .barrier{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px;margin-top:6px}
  .bar{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
       border-radius:12px;padding:20px}
  .bar-t{display:flex;align-items:center;gap:10px;margin-bottom:9px}
  .bar-t .bi{width:32px;height:32px;border-radius:8px;background:rgba(37,200,224,.18);
       border:1px solid rgba(111,227,242,.35);display:flex;align-items:center;justify-content:center;flex:none}
  .bar-t .bi svg{width:17px;height:17px;stroke:var(--cyan-2);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .bar-t h3{color:#fff;margin:0;font-size:.99rem}
  .bar p{color:#a9bfd2;font-size:.9rem;margin:0}
  .bar p b{color:var(--cyan-2)}
  .dark .slogan{margin-top:15px;background:rgba(37,200,224,.1);border:1px solid rgba(111,227,242,.3);
       color:#e8eef4;border-radius:12px;padding:16px 20px;font-size:.96rem}
  .dark .slogan b{color:var(--cyan-2)}

  /* 案例时间轴 */
  .case{background:#fff;border-radius:14px;border:1px solid var(--line);overflow:hidden;box-shadow:var(--shadow-lg);margin-top:8px}
  .case-top{padding:16px 20px;background:linear-gradient(100deg,#eefafd,#f0fbfd);border-bottom:1px solid #b8e9f2}
  .case-top .ct-label{font-size:.76rem;letter-spacing:2px;color:var(--warn);font-weight:600}
  .case-top h3{color:var(--navy);font-size:1.16rem;margin:5px 0 0}
  .case-top p{margin:8px 0 0;color:#10505e;font-size:.93rem}
  .case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
       border-bottom:1px solid var(--line)}
  .case-cell{padding:13px 20px;border-right:1px solid var(--line)}
  .case-cell:last-child{border-right:none}
  .case-cell .cl{font-size:.78rem;color:var(--muted);letter-spacing:.5px}
  .case-cell .cv{margin-top:4px;font-weight:600;color:var(--navy);font-size:.95rem;line-height:1.7}
  .flow{padding:8px 24px 22px}
  .flow-step{display:flex;gap:16px;padding:14px 0;position:relative}
  .flow-step:not(:last-child)::before{content:"";position:absolute;left:15px;top:40px;bottom:-14px;width:2px;background:var(--line-2)}
  .fs-n{width:32px;height:32px;border-radius:50%;background:var(--navy);color:#fff;flex:none;
       display:flex;align-items:center;justify-content:center;font-size:.83rem;font-weight:700;z-index:1}
  .fs-c h4{margin:0 0 3px;font-size:.97rem;color:var(--navy)}
  .fs-c p{margin:0;font-size:.9rem;color:var(--text-2)}

  /* 流程条 */
  .steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;counter-reset:st}
  .step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 18px;position:relative}
  .step::before{counter-increment:st;content:counter(st,decimal-leading-zero);
       position:absolute;top:-12px;left:18px;background:var(--cyan);color:#062530;font-size:.76rem;
       font-weight:700;padding:2px 9px;border-radius:12px}
  .step h3{font-size:.98rem;margin:8px 0 5px}
  .step p{font-size:.89rem;color:var(--text-2);margin:0}

  /* 表格 */
  .tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:10px;
       border-radius:12px;border:1px solid var(--line);background:#fff}
  table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:480px}
  th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
  thead th,table th{background:#eef2f7;color:var(--navy);font-weight:600;white-space:nowrap}
  tbody tr:last-child td{border-bottom:none}
  tbody tr:hover td{background:#fafbfd}

  /* 合作对象条 */
  .clients{margin-top:15px;background:#fff;border:1px solid var(--line);border-radius:12px;
       padding:18px 22px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
  .clients .cl-t{font-size:.86rem;color:var(--muted);flex:none}
  .clients .cl-list{display:flex;flex-wrap:wrap;gap:10px}
  .clients .cl-list span{font-weight:600;color:var(--navy);background:var(--bg-3);
       border-radius:8px;padding:6px 16px;font-size:.92rem;letter-spacing:1px}

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:8px;overflow:hidden}
  .faq-item summary{position:relative;cursor:pointer;padding:12px 44px 12px 17px;font-size:1rem;color:var(--navy);
       font-weight:600;line-height:1.6;list-style:none;display:block;transition:background .15s}
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{content:"Q";color:var(--cyan);font-weight:700;font-size:.86rem;margin-right:9px}
  .faq-item summary::after{content:"+";position:absolute;right:17px;top:50%;transform:translateY(-50%);
       color:var(--cyan);font-size:1.3rem;font-weight:400;line-height:1}
  .faq-item[open] summary::after{content:"\2013"}
  .faq-item summary:hover{background:var(--bg-2)}
  .faq-item summary h3{display:inline;margin:0;font-size:1rem;color:inherit;font-weight:inherit;line-height:inherit}
  .faq-item p{margin:0;padding:0 20px 15px 39px;color:var(--text-2);font-size:.93rem;line-height:1.72}
  .faq-item p::before{content:"A";color:var(--blue-3);font-weight:700;font-size:.82rem;margin-right:7px}

  /* 联系 */
  .contact{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}
  .contact-wrap{display:grid;grid-template-columns:1fr 1.5fr;gap:18px;align-items:start}
  .inquiry-box{scroll-margin-top:64px}
  .kv{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;margin-top:4px;font-size:.95rem}
  .kv dt{color:var(--muted);white-space:nowrap;font-weight:500}
  .kv dd{margin:0}
  .kv dd b{color:var(--navy)}

  /* 表单 */
  .notice{background:#e9f9fc;border-left:3px solid var(--cyan);border-radius:8px;padding:11px 15px;
       font-size:.87rem;color:#0b5563;margin:0}
  form{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
  .f{display:flex;flex-direction:column;gap:6px}
  .f.full{grid-column:1/-1}
  .f label{font-size:.87rem;font-weight:600;color:var(--text-2)}
  .f label .req{color:var(--danger);margin-left:2px}
  .f input,.f select,.f textarea{width:100%;padding:9px 11px;border:1px solid #cfd5dc;border-radius:9px;
      font-size:.94rem;font-family:inherit;color:var(--text);background:#fff;transition:border-color .15s,box-shadow .15s}
  .f input:focus,.f select:focus,.f textarea:focus{outline:none;border-color:var(--blue-2);box-shadow:0 0 0 3px rgba(44,110,168,.14)}
  .f textarea{resize:vertical;min-height:84px}
  .f input:user-invalid,.f select:user-invalid{border-color:var(--danger)}
  .formnote{grid-column:1/-1;font-size:.82rem;color:var(--muted)}
  .submit{grid-column:1/-1;background:var(--cyan);color:#062530;border:none;padding:12px;border-radius:9px;
          cursor:pointer;font-size:.97rem;font-weight:600;font-family:inherit;transition:background .15s}
  .submit:hover{background:var(--cyan-2)}
  .submit:disabled{opacity:.6;cursor:not-allowed}
  .tip{margin-top:13px;font-size:.92rem;padding:11px 14px;border-radius:8px;display:none}
  .tip.show{display:block}
  .tip.ok{background:#e8f6ee;color:var(--ok);border:1px solid #bfe3cd}
  .tip.err{background:#fdeceb;color:var(--danger);border:1px solid #f3c6c2}
  .tip.warn{background:#e9f9fc;color:var(--warn);border:1px solid #b8e9f2}
  .copybox{width:100%;min-height:120px;margin-top:12px;padding:12px;border:1px dashed var(--cyan);
       border-radius:9px;font-family:ui-monospace,Consolas,monospace;font-size:.86rem;background:#fffdf6;display:none;white-space:pre-wrap}

  /* 通用 */
  .pill{display:inline-block;background:#eef2f7;color:var(--blue);border-radius:14px;padding:4px 13px;
       margin:3px 5px 3px 0;font-size:.86rem;font-weight:500}
  .pill-gold{background:#e9f9fc;color:var(--warn);font-weight:600}
  .slogan{background:var(--navy);color:#fff;border-radius:12px;padding:18px 22px;margin-top:16px;font-size:.96rem}
  .slogan b{color:var(--cyan-2)}
  .mt0{margin-top:0}.mt8{margin-top:8px}.mt14{margin-top:14px}.mt20{margin-top:20px}

  footer{text-align:center;color:var(--muted);font-size:.83rem;padding:30px 16px 38px;background:var(--bg-2);
       line-height:2;border-top:1px solid var(--line)}
  footer a{color:var(--muted);text-decoration:underline}
  footer .fw{color:var(--navy);font-weight:600}
  .icp{margin-top:4px}

  .backtop{position:fixed;right:16px;bottom:16px;width:44px;height:44px;border-radius:50%;
       background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;
       box-shadow:0 6px 18px rgba(0,0,0,.24);opacity:0;pointer-events:none;transition:.2s;z-index:60;
       font-size:1.1rem}
  .backtop.show{opacity:1;pointer-events:auto}
  .backtop:hover{background:var(--blue);text-decoration:none}

  @media (max-width:900px){
    .hero-in{grid-template-columns:1fr;gap:20px;padding:28px 20px 26px}
    .contact-wrap{grid-template-columns:1fr;gap:14px}
    .hero-panel{order:2}
  }
  @media (max-width:680px){
    .stats-in{grid-template-columns:repeat(2,1fr)}
    .stat:nth-child(2){border-right:none}
    .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid rgba(255,255,255,.1)}
    form{grid-template-columns:1fr}
    .f.full,.formnote,.submit{grid-column:1/-1}
    .topbar nav .hide-m{display:none}
    .kv{grid-template-columns:1fr;gap:2px}
    .kv dt{margin-top:9px}
    .tb-sub{display:none}
    section{padding:22px 0}
    .case-grid{grid-template-columns:1fr}
    .case-cell{border-right:none;border-bottom:1px solid var(--line)}
    .case-cell:last-child{border-bottom:none}
    .flow{padding:6px 18px 18px}
    .case-top{padding:18px}
    .line-body{padding:6px 16px 14px}
    .line-head{padding:15px 16px}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
    .card:hover,.btn:hover{transform:none}
  }

/* ===== 纵向紧凑优化（减少下滑距离）===== */
  .topbar-in{padding:8px 20px}
  section{padding:20px 0}
  .sec-head{margin-bottom:11px}
  .sec-kicker{margin-bottom:5px}
  .sec-desc{margin-top:6px}
  h2 .en{margin-top:3px}
  .hero-in{padding:26px 20px 24px;gap:32px}
  .hero-logo{margin-bottom:6px}
  .hero-tags{margin-top:10px}
  .hero-cta{margin-top:13px}
  .hero-panel{padding:16px 18px}
  .hero-panel h2{margin-bottom:10px}
  .stat{padding:16px 14px}
  .grid{gap:10px}
  .card{padding:13px 14px}
  .card-ico{width:32px;height:32px;margin-bottom:7px}
  .card .tag{margin-top:7px}
  .line-block{margin-top:13px}
  .line-head{padding:13px 18px}
  .line-body{padding:6px 18px 12px}
  .item{padding:11px 0}
  .mat-grid{gap:9px;margin-top:9px}
  .mat{padding:11px 13px}
  .mat h3{margin-bottom:7px}
  .barrier{gap:10px}
  .bar{padding:15px}
  .dark .slogan{margin-top:11px;padding:12px 16px}
  .param-panel{padding:12px 18px 10px;margin-bottom:10px}
  .case{margin-top:6px}
  .case-top{padding:13px 18px}
  .case-cell{padding:10px 16px}
  .flow{padding:6px 20px 16px}
  .flow-step{padding:10px 0;gap:13px}
  .steps{gap:11px}
  .step{padding:15px}
  .tablewrap{margin-top:8px}
  th,td{padding:8px 12px}
  .clients{margin-top:11px;padding:13px 16px;gap:10px}
  .clients .cl-list span{padding:5px 13px}
  .faq-item{margin-bottom:6px}
  .faq-item summary{padding:11px 38px 11px 15px}
  .faq-item p{padding:0 16px 13px 34px}
  .contact{padding:14px 16px}
  .contact-wrap{gap:14px}
  .kv{gap:6px 14px}
  form{gap:8px;margin-top:9px}
  .f{gap:5px}
  .f textarea{min-height:72px}
  .gallery{gap:10px}
  footer{padding:22px 16px 26px}

/* ===== 中英切换 ===== */
.lang-btn{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:30px;padding:0 11px;margin-left:8px;border:1px solid var(--cyan);border-radius:16px;color:var(--cyan);font-size:.78rem;font-weight:700;letter-spacing:.02em;text-decoration:none;line-height:1;white-space:nowrap;transition:.18s}
.lang-btn:hover{background:var(--cyan);color:#062530}
@media(max-width:520px){.lang-btn{height:28px;padding:0 9px;font-size:.72rem;margin-left:4px}}

/* ===== 响应式导航修复 · 2026-10-28 =====
   问题①：681~900px 之间 8 个导航项 + EN + 电话全部显示，白名单只到 680px，
   导致 .topbar-in 溢出（768px 视口实测 docScrollWidth 838）、品牌名与导航压字、电话被切。
   问题②：≤680px 导航项全隐藏却没有任何替代入口，手机访客无法跳转章节。
   方案：≤900px 统一收进汉堡抽屉，>900px 保持原样。 */
.nav-toggle{display:none;margin-left:4px;width:38px;height:34px;padding:0;flex:none;cursor:pointer;
   border:1px solid rgba(111,227,242,.45);border-radius:8px;background:rgba(37,200,224,.08);
   color:var(--cyan-2);font-size:1.05rem;line-height:1;align-items:center;justify-content:center;
   -webkit-tap-highlight-color:transparent}
.mnav{display:none;background:#0d1c25;border-bottom:1px solid rgba(111,227,242,.22);
   max-height:calc(100vh - 56px);overflow:auto;-webkit-overflow-scrolling:touch}
.mnav.open{display:block}
.mnav a{display:block;padding:13px 20px;color:#d5e4ee;font-size:.95rem;
   border-bottom:1px solid rgba(255,255,255,.07)}
.mnav a:active{background:rgba(37,200,224,.1)}
.mnav a.mnav-tel{color:var(--cyan-2);font-weight:700}
@media (max-width:900px){
  .topbar nav a.hide-m{display:none}
  .tb-sub{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:380px){
  .topbar-in{padding:8px 12px;gap:8px}
  .tb-name{font-size:.94rem}
  .tb-tel{padding:6px 10px;font-size:.82rem}
  .nav-toggle{width:34px;height:32px}
}