/* ============================================================
   ACME CNC Machining — 全站样式
   纯 CSS，无框架。配色：深藏青 + 工业橙。
   ============================================================ */
:root{
  --navy:#0e2438;
  --steel:#16344f;
  --accent:#ff7a1a;
  --accent-d:#e56a0c;
  --bg:#ffffff;
  --light:#f2f6fa;
  --border:#dfe7ee;
  --text:#182734;
  --muted:#5c6c7c;
  --radius:10px;
  --shadow:0 8px 24px rgba(14,36,56,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI",system-ui,-apple-system,Arial,"Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;
}
img,svg{max-width:100%;display:block}
a{color:var(--steel)}
.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- 顶部联系条 ---------- */
.topbar{background:var(--navy);color:#cfe0ee;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.topbar a{color:#ffd9b3;text-decoration:none}
.topbar span.sep{opacity:.4;margin:0 6px}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy);text-decoration:none;letter-spacing:.2px;white-space:nowrap}
.logo svg{width:34px;height:34px;flex:none}
.logo small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase;line-height:1.2}
.nav-zone{display:flex;align-items:center;gap:18px}
.nav-links{display:flex;gap:20px;align-items:center;list-style:none}
.nav-links a{color:var(--text);text-decoration:none;font-weight:600;font-size:15px}
.nav-links a:hover{color:var(--accent)}
.nav-links a.cta{background:var(--accent);color:#fff;padding:9px 18px;border-radius:8px}
.nav-links a.cta:hover{background:var(--accent-d)}
.lang{font-size:13px;white-space:nowrap}
.lang a{color:var(--muted);text-decoration:none}
.lang a.on{color:var(--accent);font-weight:700}
/* 纯 CSS 移动端菜单 */
.nav-toggle{display:none}
.burger{display:none;font-size:26px;cursor:pointer;color:var(--navy);user-select:none}
@media (max-width:900px){
  .burger{display:block}
  .nav-zone{
    position:absolute;top:64px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;padding:12px 20px 20px;
    border-bottom:1px solid var(--border);display:none;
  }
  .nav-toggle:checked ~ .nav-zone{display:flex}
  .nav-links{flex-direction:column;align-items:flex-start;gap:14px;width:100%}
}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--steel) 100%);color:#fff;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:70px;padding-bottom:70px}
.hero h1{font-size:clamp(30px,4.5vw,46px);line-height:1.18;font-weight:800}
.hero h1 em{color:var(--accent);font-style:normal}
.hero p.lead{margin:18px 0 26px;font-size:17px;color:#c9d9e8;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:8px;font-weight:700;text-decoration:none;font-size:15px;transition:.15s}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-d)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.trust-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}
.trust-chips span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:6px 14px;border-radius:99px;font-size:13px;color:#dbe7f2}
.hero-art{filter:drop-shadow(0 14px 30px rgba(0,0,0,.35))}
@media (max-width:900px){
  .hero .container{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
  .hero-art{max-width:420px;margin:0 auto}
}

/* ---------- 页面 banner（内页） ---------- */
.page-banner{background:linear-gradient(135deg,var(--navy),var(--steel));color:#fff;padding:52px 0}
.page-banner h1{font-size:clamp(26px,3.6vw,38px)}
.page-banner p{color:#c9d9e8;margin-top:8px;max-width:640px}

/* ---------- 通用 section ---------- */
.section{padding:64px 0}
.section.light{background:var(--light)}
.section-head{max-width:640px;margin-bottom:36px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{color:var(--accent);font-weight:800;font-size:13px;letter-spacing:2px;text-transform:uppercase}
.section-head h2{font-size:clamp(24px,3vw,32px);margin-top:6px;line-height:1.25}
.section-head p{color:var(--muted);margin-top:10px}

/* ---------- 统计带 ---------- */
.stats{background:var(--navy);color:#fff;padding:34px 0}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats b{display:block;font-size:clamp(24px,3vw,34px);color:var(--accent)}
.stats span{font-size:13px;color:#b9cad9}
@media (max-width:700px){.stats .container{grid-template-columns:repeat(2,1fr)}}

/* ---------- 卡片网格 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:900px){.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid-4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card .icon{width:44px;height:44px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.card ul{margin:10px 0 0;padding-left:18px;color:var(--muted);font-size:14.5px}
.card ul li{margin:4px 0}
.card a.more{display:inline-block;margin-top:14px;font-weight:700;color:var(--accent);text-decoration:none}

/* ---------- 材料标签 ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips span{background:#fff;border:1px solid var(--border);padding:8px 16px;border-radius:99px;font-size:14px;color:var(--text)}
.chips span b{color:var(--steel)}

/* ---------- 流程时间线 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:step}
.step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);display:block;font-size:26px;font-weight:800;color:var(--accent);margin-bottom:6px}
.step h4{font-size:15px;margin-bottom:4px}
.step p{font-size:13px;color:var(--muted)}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
table.spec th{background:var(--navy);color:#fff;text-align:left;padding:12px 16px;font-size:13.5px;letter-spacing:.5px}
table.spec td{padding:12px 16px;border-top:1px solid var(--border)}
table.spec tr:nth-child(even) td{background:var(--light)}
table.spec td:first-child{font-weight:700;color:var(--steel);white-space:nowrap}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
label{font-size:13.5px;font-weight:700;display:block;margin-bottom:6px}
input[type=text],input[type=email],select,textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:8px;
  font:inherit;font-size:15px;background:#fff;color:var(--text);
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{min-height:130px;resize:vertical}
.form-note{font-size:13px;color:var(--muted);margin-top:14px}

/* ---------- 联系卡 ---------- */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:40px}
@media (max-width:820px){.contact-cards{grid-template-columns:1fr}}
.contact-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.contact-card h3{font-size:15px;margin-bottom:6px}
.contact-card p{color:var(--muted);font-size:14.5px;word-break:break-all}
.contact-card b{color:var(--text)}

/* ---------- CTA 带 ---------- */
.cta-band{background:linear-gradient(135deg,var(--accent),#ff9540);color:#fff;padding:52px 0;text-align:center}
.cta-band h2{font-size:clamp(22px,3vw,30px)}
.cta-band p{margin:10px 0 22px;color:#fff3e8}
.cta-band .btn{background:#fff;color:var(--accent-d)}
.cta-band .btn:hover{background:#fff4ea}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--navy);color:#a9bfd2;font-size:14px;padding:52px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding-bottom:36px}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:1px;margin-bottom:14px;text-transform:uppercase}
.site-footer ul{list-style:none}
.site-footer li{margin:7px 0}
.site-footer a{color:#c9d9e8;text-decoration:none}
.site-footer a:hover{color:var(--accent)}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;margin-bottom:12px}
.footer-brand svg{width:30px;height:30px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- 杂项 ---------- */
.note-box{background:#fff8f1;border:1px solid #ffd9b3;border-radius:var(--radius);padding:16px 18px;font-size:14px;color:#7a4a12}
.checklist{list-style:none;padding:0}
.checklist li{padding-left:28px;position:relative;margin:9px 0;color:var(--muted)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:800}