/* ============ 设计系统 / Design Tokens ============ */
:root{
  --primary:#0A4D8C;
  --secondary:#00A3B4;
  --accent:#F5A623;
  --text:#4A5568;
  --dark:#1A2B3C;
  --bg:#ffffff;
  --bg-alt:#F7F9FC;
  --line:#E4EBF2;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(26,43,60,.08);
  --shadow-lg:0 20px 50px rgba(10,77,140,.16);
  --maxw:1180px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
}
/* ============ 基础 ============ */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{scroll-margin-top:90px}

/* 语言切换：默认显示中文，en 隐藏 */
.lang-en .zh{display:none}
.lang-zh .en{display:none}
/* 内容 span 默认行内显示 */
.zh,.en{display:inline}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:2px solid transparent;transition:.25s;white-space:nowrap}
.btn--primary{background:var(--primary);color:#fff}
.btn--primary:hover{background:#083a6b;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn--accent{background:var(--accent);color:var(--dark)}
.btn--accent:hover{background:#e08e12;transform:translateY(-2px);box-shadow:0 10px 24px rgba(245,166,35,.35)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.btn--block{width:100%}

/* ============ 顶部条 ============ */
.topbar{background:var(--dark);color:#cdd8e4;font-size:13px}
.topbar__inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar__right{display:flex;align-items:center;gap:10px}
.topbar__link{color:#9fd6e0}
.topbar__link:hover{color:#fff}
.topbar__sep{opacity:.4}
.lang-switch{cursor:pointer;font-weight:600;color:var(--accent);padding:2px 8px;border:1px solid rgba(245,166,35,.4);border-radius:999px}
.lang-switch:hover{background:rgba(245,166,35,.12)}

/* ============ 导航 ============ */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px}
.logo__mark{flex:0 0 auto}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__text strong{font-size:18px;color:var(--dark);letter-spacing:.5px}
.logo__text em{font-style:normal;font-size:11px;color:var(--text);letter-spacing:.3px}
.nav{display:flex;align-items:center;gap:26px}
.nav__link{font-weight:500;color:var(--dark);position:relative;padding:6px 0}
.nav__link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--secondary);transition:.25s}
.nav__link:hover::after{width:100%}
.nav__cta{padding:9px 20px;margin-left:6px}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.hamburger span{width:26px;height:3px;background:var(--dark);border-radius:3px;transition:.3s}

/* ============ Hero ============ */
.hero{position:relative;background:linear-gradient(135deg,#0A4D8C 0%,#0d6fa8 55%,#00A3B4 100%);color:#fff;overflow:hidden}
.hero__bg{position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(245,166,35,.25),transparent 45%),radial-gradient(circle at 10% 90%,rgba(0,163,180,.35),transparent 40%)}
.hero__inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:80px 24px 120px}
.hero__badge{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:22px}
.hero__title{font-size:clamp(30px,4.4vw,52px);line-height:1.18;font-weight:800;margin-bottom:20px;display:flex;flex-direction:column}
.hero__sub{font-size:17px;max-width:560px;color:#e6f1f7;margin-bottom:30px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:24px}
.hero__trust{font-size:14px;color:#bfe0ea;display:flex;align-items:center;gap:8px}
.hero__trust::before{content:"";width:28px;height:2px;background:var(--accent)}
.hero__visual{position:relative}
.hero__wave{position:absolute;left:0;right:0;bottom:-1px;height:60px;background:var(--bg);clip-path:ellipse(75% 100% at 50% 100%)}

/* ============ 数据条 ============ */
.stats{background:var(--bg);margin-top:-30px;position:relative;z-index:2}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 24px;transform:translateY(-40px)}
.stat{text-align:center}
.stat b{display:block;font-size:34px;color:var(--primary);font-weight:800;line-height:1}
.stat span{font-size:13px;color:var(--text)}

/* ============ 通用区块 ============ */
.section{padding:84px 0}
.section--alt{background:var(--bg-alt)}
.section__head{text-align:center;max-width:760px;margin:0 auto 48px}
.eyebrow{display:inline-block;color:var(--secondary);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.eyebrow--light{color:#9fd6e0}
.section__title{font-size:clamp(24px,3vw,36px);color:var(--dark);font-weight:800;line-height:1.25}
.section__lead{margin-top:14px;font-size:16px;color:var(--text)}

/* ============ 关于 ============ */
.about{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.about__text p{margin-bottom:16px;font-size:16px}
.about__text strong{color:var(--primary)}
.checklist{list-style:none;margin:22px 0 28px;display:grid;gap:12px}
.checklist li{position:relative;padding-left:30px;font-weight:500;color:var(--dark)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;background:var(--secondary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.about__cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mini-card{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px;transition:.25s}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--secondary)}
.mini-card__num{display:block;font-size:22px;font-weight:800;color:var(--accent);margin-bottom:6px}
.mini-card span:last-child{font-size:14px;color:var(--text)}

/* ============ 产品分类 ============ */
.pcats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:44px}
.pcat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:.25s}
.pcat:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--secondary)}
.pcat__icon{font-size:34px;margin-bottom:14px}
.pcat h3{color:var(--dark);font-size:18px;margin-bottom:8px}
.pcat p{font-size:14px}

/* ============ 产品表格 ============ */
.ptable-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.ptable{width:100%;border-collapse:collapse;font-size:14px}
.ptable thead{background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff}
.ptable th,.ptable td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line)}
.ptable th{font-weight:600;white-space:nowrap}
.ptable tbody tr:nth-child(even){background:var(--bg-alt)}
.ptable tbody tr:hover{background:#eaf6f8}
.ptable b{color:var(--primary)}
.ptable__note{padding:14px 18px;font-size:13px;color:var(--text);background:var(--bg-alt)}

/* ============ 应用领域 ============ */
.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.app{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.25s;position:relative;overflow:hidden}
.app::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--secondary),var(--accent));transform:scaleX(0);transform-origin:left;transition:.3s}
.app:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.app:hover::before{transform:scaleX(1)}
.app__icon{font-size:36px;margin-bottom:14px}
.app h3{color:var(--dark);font-size:19px;margin-bottom:10px}
.app p{font-size:14px}

/* ============ 核心优势 ============ */
.advs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.adv{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.adv:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.adv__no{font-size:30px;font-weight:800;color:var(--line);display:block;margin-bottom:8px}
.adv h3{color:var(--dark);font-size:19px;margin-bottom:10px}
.adv p{font-size:14px}

/* ============ 资质 ============ */
.certs{background:var(--dark);color:#fff;text-align:center;padding:64px 0}
.certs__title{font-size:clamp(22px,3vw,32px);font-weight:800;margin-bottom:30px}
.certs__row{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:18px}
.cert{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);padding:14px 26px;border-radius:999px;font-weight:600;letter-spacing:1px}
.certs__note{font-size:14px;color:#b9c6d4;max-width:680px;margin:0 auto}

/* ============ 行业洞察 ============ */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news__item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.news__item:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.news__tag{display:inline-block;background:var(--bg-alt);color:var(--secondary);font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:14px}
.news__item h3{color:var(--dark);font-size:18px;margin-bottom:10px;line-height:1.35}
.news__item p{font-size:14px}

/* ============ 联系询盘 ============ */
.section--contact{background:linear-gradient(135deg,#0A4D8C,#00A3B4);padding-bottom:90px}
.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact__title{color:#fff;font-size:clamp(24px,3vw,34px);font-weight:800;margin:10px 0 14px}
.contact__lead{color:#dceaf1;margin-bottom:26px;max-width:460px}
.contact__list{list-style:none;display:grid;gap:18px}
.contact__list li{display:flex;gap:14px;align-items:flex-start;color:#eaf3f7}
.contact__ic{font-size:22px;flex:0 0 auto}
.contact__list b{display:block;color:#fff;font-size:14px;margin-bottom:2px}
.contact__list a:hover{color:var(--accent)}
.inquiry{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-lg);display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field--full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600;color:var(--dark)}
.field input,.field select,.field textarea{font-family:inherit;font-size:14px;padding:11px 13px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-alt);color:var(--text);transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--secondary);background:#fff;box-shadow:0 0 0 3px rgba(0,163,180,.15)}
.field textarea{resize:vertical}
.form__hint{font-size:12px;color:var(--text);margin-top:8px}
.form__success{margin-top:4px;background:#e7f7ee;color:#1d7a45;border:1px solid #b7e6c9;border-radius:var(--radius-sm);padding:12px 14px;font-size:14px;font-weight:500;grid-column:1/-1}

/* ============ 页脚 ============ */
.footer{background:var(--dark);color:#b9c6d4;padding:60px 0 24px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer__col a,.footer__col span{display:block;font-size:14px;margin-bottom:10px;color:#b9c6d4}
.footer__col a:hover{color:var(--accent)}
.footer__col--brand p{font-size:14px;margin-top:14px;max-width:300px;color:#9fb0c0}
.logo--light .logo__text strong{color:#fff}
.logo--light .logo__text{line-height:1}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;text-align:center;font-size:13px;color:#8a9bb0}

/* ============ 浮动询盘按钮 ============ */
.fab{position:fixed;right:22px;bottom:22px;z-index:90;background:var(--accent);color:var(--dark);font-weight:700;padding:13px 22px;border-radius:999px;box-shadow:0 10px 26px rgba(245,166,35,.45);display:none}
.fab:hover{transform:translateY(-3px)}

/* ============ 滚动揭示 ============ */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.show{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .hero__inner{grid-template-columns:1fr;padding-top:56px}
  .hero__visual{max-width:380px;margin:10px auto 0}
  .about{grid-template-columns:1fr;gap:32px}
  .contact{grid-template-columns:1fr;gap:32px}
  .pcats,.apps{grid-template-columns:repeat(2,1fr)}
  .advs,.news{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav{position:fixed;top:74px;right:0;height:calc(100vh - 74px);width:78%;max-width:320px;background:#fff;flex-direction:column;align-items:flex-start;gap:6px;padding:20px;transform:translateX(110%);transition:.3s;box-shadow:var(--shadow-lg);border-left:1px solid var(--line)}
  .nav.open{transform:translateX(0)}
  .nav__link{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav__cta{margin:10px 0 0;width:100%}
  .hamburger{display:flex}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:14px;padding:20px 14px}
  .pcats,.apps,.advs,.news{grid-template-columns:1fr}
  .about__cards{grid-template-columns:1fr 1fr}
  .inquiry{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  .topbar__inner{font-size:11px}
  .section{padding:60px 0}
  .fab{display:inline-flex}
}