*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:#333;line-height:1.7}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%}
.container{width:min(1200px,92%);margin:0 auto}

/* ===== 固定背景：集装箱船大图（滚动不动） ===== */
.bg-fixed{position:fixed;inset:0;z-index:-2;
  background:url("https://images.unsplash.com/photo-1494412574643-ff11b0a5c1c3?auto=format&fit=crop&w=1920&q=80") center/cover no-repeat #0d2137}
/* 换自己的图：下载图片存为 images/ship-bg.jpg，把上面 url 改成 url("../images/ship-bg.jpg") */

/* ===== 顶部导航 ===== */
#header{position:fixed;top:0;left:0;width:100%;z-index:100;padding:18px 0;transition:.4s;
  background:linear-gradient(to bottom,rgba(0,0,0,.5),transparent)}
#header.scrolled{background:rgba(10,25,41,.95);padding:10px 0;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:12px;color:#fff}
.logo img{height:44px;width:auto}
.logo-text{font-size:20px;font-weight:700;line-height:1.2;display:flex;flex-direction:column}
.logo-text em{font-style:normal;font-size:11px;font-weight:400;letter-spacing:2px;opacity:.85}
#nav ul{display:flex;gap:30px;align-items:center}
#nav a{color:#fff;font-size:15px;padding:6px 0;position:relative}
#nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:#4db2ff;transition:.3s}
#nav a:hover::after,#nav a.active::after{width:100%}
#menu-btn{display:none;background:none;border:0;cursor:pointer}
#menu-btn span{display:block;width:24px;height:2px;background:#fff;margin:5px 0}

/* ===== 首页 Hero：深色智能遮罩（背景船图直接透出） ===== */
.hero{min-height:92vh;display:flex;align-items:center;justify-content:center;position:relative;text-align:center}
.hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(8,22,40,.78) 0%,rgba(13,33,55,.5) 50%,rgba(13,33,55,.25) 100%)}
.hero-content{position:relative;z-index:1;color:#fff;padding:0 20px}
.hero-content h1{font-size:clamp(32px,5vw,56px);letter-spacing:6px;margin-bottom:14px;text-shadow:0 2px 18px rgba(0,0,0,.5)}
.hero-content p{font-size:clamp(14px,2vw,20px);letter-spacing:3px;opacity:.9;margin-bottom:36px}
.btn{display:inline-block;background:#1a73c0;color:#fff;padding:14px 46px;border:0;font-size:16px;
  letter-spacing:4px;cursor:pointer;transition:.3s;border-radius:2px;font-family:inherit}
.btn:hover{background:#4db2ff;transform:translateY(-2px)}

/* ===== 内页横幅 ===== */
.page-banner{height:300px;display:flex;align-items:center;justify-content:center;position:relative;margin-top:0}
.page-banner::before{content:"";position:absolute;inset:0;background:rgba(8,22,40,.6)}
.page-banner h1{position:relative;z-index:1;color:#fff;font-size:38px;letter-spacing:6px}
.page-banner p{position:relative;z-index:1;color:rgba(255,255,255,.8);letter-spacing:2px;text-align:center}

/* ===== 半透明内容面板（能透出船图） ===== */
.section{padding:36px 0}
.section-panel{background:rgba(255,255,255,.9);padding:55px 45px;border-radius:8px;
  box-shadow:0 10px 35px rgba(0,0,0,.18)}
.section-title{text-align:center;font-size:30px;margin-bottom:45px;color:#0d2137;position:relative}
.section-title::after{content:"";display:block;width:60px;height:3px;background:#1a73c0;margin:14px auto 0}

/* ===== 首页：服务小图标（截图样式） ===== */
.service-icons{display:grid;grid-template-columns:repeat(5,1fr);gap:34px 12px}
.s-icon{text-align:center;color:#333}
.s-icon .circle{width:108px;height:108px;border-radius:50%;margin:0 auto 12px;
  background:linear-gradient(135deg,#eaf4fd,#d3e8f9);border:4px solid #fff;
  display:flex;align-items:center;justify-content:center;font-size:38px;color:#1a73c0;
  box-shadow:0 6px 16px rgba(13,33,55,.18);transition:.3s}
.s-icon:hover .circle{transform:translateY(-6px);background:#1a73c0;color:#fff}
.s-icon b{font-weight:600;font-size:15px}

/* ===== 解决方案卡片 ===== */
.solutions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.sol-card{background:#fff;padding:40px 30px;border-radius:6px;border-top:3px solid transparent;
  box-shadow:0 4px 18px rgba(0,0,0,.08);transition:.35s}
.sol-card:hover{transform:translateY(-6px);border-top-color:#1a73c0;box-shadow:0 12px 28px rgba(0,0,0,.14)}
.sol-card i{font-size:32px;color:#1a73c0;margin-bottom:16px;display:block}
.sol-card h3{font-size:19px;margin-bottom:12px;color:#0d2137}
.sol-card p{font-size:14px;color:#777}

/* ===== 服务页：左Tab + 右详情 ===== */
.services-layout{display:grid;grid-template-columns:240px 1fr;gap:40px}
.services-tabs{border-right:1px solid #e3e8ee}
.services-tabs li{padding:13px 18px;cursor:pointer;font-size:15px;color:#555;
  border-left:3px solid transparent;transition:.3s}
.services-tabs li:hover{color:#1a73c0}
.services-tabs li.active{color:#1a73c0;border-left-color:#1a73c0;background:#f0f7fd;font-weight:600}
.panel{display:none;animation:fade .5s}
.panel.active{display:block}
.panel h3{font-size:24px;color:#0d2137;margin-bottom:16px}
.panel p{color:#666;margin-bottom:18px}
.panel ul{padding-left:2px}
.panel ul li{color:#555;padding:8px 0 8px 26px;position:relative;border-bottom:1px dashed #e3e8ee}
.panel ul li::before{content:"\f058";font-family:"Font Awesome 6 Free";font-weight:900;
  color:#1a73c0;position:absolute;left:0;font-size:15px}
@keyframes fade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ===== 全球网络 / 关于 ===== */
.regions{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:45px}
.regions li{background:rgba(240,247,253,.95);color:#0d2137;text-align:center;padding:22px 10px;
  border-radius:4px;font-weight:600;transition:.3s}
.regions li:hover{background:#1a73c0;color:#fff;transform:translateY(-4px)}
.about-block{max-width:860px;margin:0 auto 35px}
.about-block h3{font-size:22px;color:#0d2137;margin-bottom:14px;padding-left:14px;border-left:4px solid #1a73c0}
.about-block p{color:#555}
.adv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:10px}
.adv{background:rgba(240,247,253,.95);padding:28px 22px;border-radius:6px;text-align:center}
.adv i{font-size:30px;color:#1a73c0;margin-bottom:12px;display:block}
.adv h4{color:#0d2137;margin-bottom:8px}
.adv p{font-size:13.5px;color:#666}

/* ===== 数据统计 ===== */
.stats-panel{background:rgba(13,33,55,.82);border-radius:8px;padding:55px 30px;backdrop-filter:blur(2px)}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;text-align:center;color:#fff}
.stat .num{font-size:46px;font-weight:700;color:#4db2ff}
.stat i{font-style:normal;font-size:22px;color:#4db2ff;margin-left:4px}
.stat p{margin-top:8px;opacity:.85}

/* ===== CTA 横条 ===== */
.cta-panel{background:rgba(13,33,55,.82);border-radius:8px;padding:45px;text-align:center;color:#fff}
.cta-panel h2{margin-bottom:10px;letter-spacing:3px}
.cta-panel p{opacity:.85;margin-bottom:26px}

/* ===== 联系页 ===== */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.contact-list li{margin-bottom:16px;color:#555;display:flex;gap:12px;align-items:flex-start}
.contact-list i{color:#1a73c0;margin-top:5px;width:20px;text-align:center}
.quote-form{display:grid;gap:16px}
.quote-form input,.quote-form textarea{width:100%;padding:14px 16px;border:1px solid #d6dde5;border-radius:4px;
  font-size:15px;font-family:inherit;outline:none;transition:.3s;background:#fff}
.quote-form input:focus,.quote-form textarea:focus{border-color:#1a73c0;box-shadow:0 0 0 3px rgba(26,115,192,.12)}

/* ===== Footer ===== */
#footer{margin-top:36px;background:rgba(8,20,33,.94);color:#aebdcd;padding:55px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px;padding-bottom:40px}
#footer h4{color:#fff;margin-bottom:18px;font-size:17px}
#footer ul li{margin-bottom:10px;font-size:14px}
#footer a:hover{color:#4db2ff}
.copyright{border-top:1px solid rgba(255,255,255,.08);text-align:center;padding:18px;font-size:13px}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .service-icons{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  #nav{position:fixed;top:0;right:-260px;width:250px;height:100vh;background:#0d2137;
    padding:80px 30px;transition:.35s}
  #nav.open{right:0}
  #nav ul{flex-direction:column;gap:26px}
  #menu-btn{display:block;z-index:101}
  .services-layout,.contact-layout{grid-template-columns:1fr}
  .services-tabs{border-right:0;border-bottom:1px solid #e3e8ee;display:flex;flex-wrap:wrap}
  .services-tabs li{border-left:0;border-bottom:3px solid transparent;padding:9px 13px}
  .services-tabs li.active{border-bottom-color:#1a73c0}
  .section-panel{padding:38px 24px}
  .footer-grid{grid-template-columns:1fr}
  .hero{min-height:80vh}
}
@media(max-width:520px){
  .service-icons{grid-template-columns:repeat(2,1fr)}
  .s-icon .circle{width:88px;height:88px;font-size:30px}
}