/* ============================================================
   华洋船舶科技 HUAYANG SHIP-TECH — 海洋科技风独立站样式
   ============================================================ */
:root{
  --deep:#04203A;        /* 深海蓝 */
  --navy:#0A3D62;        /* 主蓝 */
  --ocean:#0B6FA4;       /* 海洋蓝 */
  --cyan:#00B4D8;        /* 科技青 */
  --cyan-2:#48CAE4;      /* 浅青 */
  --ice:#EAF6FB;         /* 浅冰蓝底 */
  --mist:#F5FAFD;        /* 更浅底 */
  --ink:#1B2A38;         /* 正文深色 */
  --gray:#5B6B7A;        /* 次要文字 */
  --line:#D9E8F0;        /* 分隔线 */
  --white:#FFFFFF;
  --radius:10px;
  --shadow:0 2px 12px rgba(4,32,58,.08);
  --shadow-lg:0 8px 30px rgba(4,32,58,.14);
  --font:"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);line-height:1.65;background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.ic{width:1em;height:1em;fill:currentColor;vertical-align:-.12em}
.ic.big{width:1.6em;height:1.6em}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 26px;border-radius:6px;
  font-weight:600;font-size:15px;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn-primary{background:var(--cyan);color:#fff}
.btn-primary:hover{background:var(--ocean);transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,180,216,.35)}
.btn-ghost{border:2px solid rgba(255,255,255,.85);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-lg{padding:14px 34px;font-size:16px}
.btn-block{width:100%;justify-content:center}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--deep);color:#BFE3F2;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:22px}
.topbar-item{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.topbar-item a:hover{color:#fff}
.lang-btn{margin-left:14px;border:1px solid var(--cyan);color:var(--cyan-2);padding:3px 14px;border-radius:4px;font-size:12.5px;font-weight:600;transition:.2s}
.lang-btn:hover{background:var(--cyan);color:#fff}

/* ---------- 导航栏 ---------- */
.navbar{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s}
.navbar.scrolled{box-shadow:var(--shadow)}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{width:44px;height:44px}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text strong{font-size:19px;color:var(--deep);letter-spacing:1px}
.logo-text small{font-size:10.5px;color:var(--gray);max-width:220px}
.nav-menu{display:flex;gap:4px;margin-left:auto}
.nav-link{padding:8px 13px;font-size:15px;color:var(--ink);border-radius:6px;position:relative;transition:.15s}
.nav-link:hover{color:var(--ocean);background:var(--ice)}
.nav-link.active{color:var(--ocean);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:3px;border-radius:2px;background:var(--cyan)}
.nav-cta{flex-shrink:0}
.hamburger{display:none;flex-direction:column;gap:5px;padding:8px;margin-left:auto}
.hamburger span{width:24px;height:2.5px;background:var(--deep);border-radius:2px;transition:.25s}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:640px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,rgba(4,32,58,.92) 0%,rgba(4,32,58,.72) 42%,rgba(4,32,58,.28) 75%,rgba(0,180,216,.18) 100%)}
.hero-content{padding:96px 24px 64px}
.hero-tag{display:inline-block;font-size:13px;letter-spacing:2.5px;color:var(--cyan-2);
  border:1px solid rgba(72,202,228,.55);padding:6px 16px;border-radius:30px;margin-bottom:22px}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.22;font-weight:800;letter-spacing:.5px;text-shadow:0 2px 18px rgba(0,0,0,.3)}
.hero-sub{max-width:720px;margin-top:18px;font-size:16.5px;color:#D8EDF7}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-stats{background:rgba(4,32,58,.82);backdrop-filter:blur(6px);border-top:1px solid rgba(72,202,228,.25)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:26px 24px}
.stat{text-align:center;position:relative}
.stat+.stat::before{content:"";position:absolute;left:-6px;top:15%;height:70%;width:1px;background:rgba(72,202,228,.28)}
.stat b{display:block;font-size:clamp(26px,3vw,38px);font-weight:800;color:var(--cyan-2)}
.stat span{font-size:13.5px;color:#B9D8E8}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0}
.section-alt{background:var(--mist)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 52px}
.sec-eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:3px;color:var(--cyan);
  margin-bottom:10px;padding-left:18px;position:relative}
.sec-eyebrow::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:10px;height:10px;background:var(--cyan);border-radius:2px}
.sec-eyebrow.light{color:var(--cyan-2)}
.sec-title{font-size:clamp(24px,3vw,34px);line-height:1.35;font-weight:800;color:var(--deep)}
.sec-title.light{color:#fff}

/* ---------- 关于我们 ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center}
.about-media{position:relative}
.about-media img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.about-badge{position:absolute;left:-14px;bottom:26px;background:var(--deep);color:#fff;padding:16px 22px;border-radius:8px;
  border-left:4px solid var(--cyan);box-shadow:var(--shadow-lg);max-width:300px}
.about-badge b{display:block;font-size:16px;margin-bottom:3px}
.about-badge span{font-size:12.5px;color:#A9CFE2}
.about-text p{color:var(--gray);margin-bottom:14px;font-size:15.5px}
.about-text .sec-title{margin-bottom:18px}
.about-points{margin:20px 0 28px;display:grid;gap:12px}
.about-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink)}
.about-points .ic{color:var(--cyan);margin-top:4px;flex-shrink:0}

/* ---------- 业务卡片 ---------- */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--cyan-2)}
.card-img{position:relative;height:190px;overflow:hidden;background:var(--ice)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-no{position:absolute;top:12px;left:12px;background:rgba(4,32,58,.85);color:var(--cyan-2);
  font-weight:800;font-size:13px;padding:4px 11px;border-radius:5px;letter-spacing:1px}
.card-body{padding:22px 24px 26px;border-top:3px solid var(--cyan)}
.card-body h3{font-size:18px;color:var(--deep);margin-bottom:9px}
.card-body p{font-size:14px;color:var(--gray)}

/* ---------- 交钥匙流程 ---------- */
.timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;counter-reset:step}
.timeline li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 16px 22px;text-align:center;position:relative;transition:.2s}
.timeline li:hover{border-color:var(--cyan);box-shadow:var(--shadow)}
.timeline li::after{content:"";position:absolute;top:44px;right:-13px;width:8px;height:8px;
  border-top:2.5px solid var(--cyan);border-right:2.5px solid var(--cyan);transform:rotate(45deg)}
.timeline li:last-child::after{display:none}
.timeline i{display:flex;align-items:center;justify-content:center;width:44px;height:44px;margin:0 auto 14px;
  background:var(--ice);border:2px solid var(--cyan);color:var(--ocean);border-radius:50%;font-style:normal;font-weight:800;font-size:18px}
.timeline b{display:block;font-size:15.5px;color:var(--deep);margin-bottom:4px}
.timeline span{font-size:12.5px;color:var(--gray)}

/* ---------- 深色数据带 ---------- */
.section-dark{background:linear-gradient(135deg,var(--deep) 0%,var(--navy) 60%,#0B4F7E 100%);padding:88px 0;color:#fff;position:relative;overflow:hidden}
.section-dark::before{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(72,202,228,.14) 1px,transparent 1px);background-size:26px 26px}
.section-dark .container{position:relative}
.strength-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.strength-item{background:rgba(255,255,255,.06);border:1px solid rgba(72,202,228,.25);border-radius:var(--radius);
  padding:28px 20px;text-align:center;transition:.2s}
.strength-item:hover{background:rgba(0,180,216,.14);border-color:var(--cyan)}
.strength-item b{display:block;font-size:clamp(28px,3.2vw,40px);font-weight:800;color:var(--cyan-2)}
.strength-item span{font-size:13.5px;color:#B9D8E8}
.partners{margin-top:56px}
.partners-title{text-align:center;font-size:13px;letter-spacing:2.5px;color:var(--cyan-2);margin:26px 0 16px}
.partner-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.partner-tags span{border:1px solid rgba(72,202,228,.35);color:#D8EDF7;font-size:13.5px;
  padding:7px 16px;border-radius:30px;background:rgba(255,255,255,.04)}

/* ---------- 案例 ---------- */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--cyan-2)}
.case-img{position:relative;height:210px;overflow:hidden;background:var(--ice)}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-card:hover .case-img img{transform:scale(1.06)}
.case-tag{position:absolute;top:12px;left:12px;background:var(--cyan);color:#fff;font-size:11.5px;font-weight:700;
  letter-spacing:1px;padding:4px 12px;border-radius:4px;white-space:nowrap}
.case-body{padding:20px 24px 24px}
.case-body h3{font-size:17px;color:var(--deep);margin-bottom:8px}
.case-body p{font-size:13.5px;color:var(--gray)}

/* ---------- 业绩表 ---------- */
.perf{margin-top:64px}
.perf-title{text-align:center;font-size:20px;color:var(--deep);margin-bottom:24px;font-weight:700}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.perf-table{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
.perf-table th{background:var(--deep);color:#fff;font-weight:600;padding:13px 16px;text-align:left;white-space:nowrap}
.perf-table td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--ink)}
.perf-table tbody tr:nth-child(even){background:var(--mist)}
.perf-table tbody tr:hover{background:var(--ice)}
.perf-table td:nth-child(3){font-weight:700;color:var(--ocean);white-space:nowrap}
.perf-table td:first-child{font-weight:600;color:var(--navy);white-space:nowrap}

/* ---------- 证书 ---------- */
.certs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.cert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--cyan-2)}
.cert-card img{height:220px;width:100%;object-fit:contain;background:var(--mist);padding:10px}
.cert-card figcaption{padding:13px 14px;font-size:13.5px;color:var(--navy);font-weight:600;text-align:center;border-top:1px solid var(--line)}
.proof-title{text-align:center;font-size:20px;color:var(--deep);margin:56px 0 24px;font-weight:700}
.proof-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.proof-img{height:190px;width:100%;object-fit:cover;object-position:top;border:1px solid var(--line);border-radius:8px;cursor:zoom-in;transition:.2s;background:var(--mist)}
.proof-img:hover{border-color:var(--cyan);box-shadow:var(--shadow-lg);transform:translateY(-3px)}

/* ---------- 联系我们 ---------- */
.contact .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact-desc{color:#B9D8E8;font-size:15px;margin:16px 0 30px;max-width:480px}
.contact-phone{display:inline-flex;align-items:center;gap:16px;background:rgba(0,180,216,.14);
  border:1px solid var(--cyan);border-radius:var(--radius);padding:18px 28px;margin-bottom:28px;transition:.2s}
.contact-phone:hover{background:rgba(0,180,216,.26)}
.contact-phone .ic{color:var(--cyan-2)}
.contact-phone small{display:block;font-size:12px;color:#9CC4D9}
.contact-phone b{font-size:clamp(22px,2.6vw,30px);color:#fff;letter-spacing:1px}
.contact-list{display:grid;gap:14px;color:#C8E2F0;font-size:14.5px}
.contact-list li{display:flex;gap:10px;align-items:flex-start}
.contact-list .ic{color:var(--cyan-2);margin-top:4px;flex-shrink:0}
.contact-form{background:#fff;border-radius:var(--radius);padding:34px 32px;color:var(--ink);box-shadow:var(--shadow-lg)}
.contact-form h3{font-size:20px;color:var(--deep);margin-bottom:20px;padding-bottom:14px;border-bottom:3px solid var(--cyan);display:inline-block}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;margin-bottom:14px;padding:12px 14px;
  border:1.5px solid var(--line);border-radius:6px;font-size:14.5px;font-family:inherit;color:var(--ink);background:var(--mist);transition:border .15s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--cyan);background:#fff}
.contact-form textarea{resize:vertical}
.form-note{font-size:12.5px;color:var(--gray);margin-top:12px;text-align:center}

/* ---------- 页脚 ---------- */
.footer{background:#03182B;color:#9CC4D9;padding-top:52px}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand b{color:#fff;font-size:16px;display:block;margin-bottom:10px}
.footer-brand p{font-size:13.5px;max-width:340px}
.footer-links{display:flex;flex-direction:column;gap:9px;font-size:14px}
.footer-links a:hover{color:var(--cyan-2)}
.footer-contact{display:flex;flex-direction:column;gap:9px;font-size:14px}
.footer-copy{border-top:1px solid rgba(156,196,217,.16);padding:16px 0;font-size:12.5px;text-align:center}

/* ---------- 浮动按钮 ---------- */
.float-btns{position:fixed;right:22px;bottom:26px;display:flex;flex-direction:column;gap:12px;z-index:300}
.float-call{width:54px;height:54px;border-radius:50%;background:var(--cyan);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:22px;box-shadow:0 6px 18px rgba(0,180,216,.45);animation:pulse 2.4s infinite}
.float-call:hover{background:var(--ocean)}
.float-top{width:44px;height:44px;border-radius:8px;background:var(--deep);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;opacity:0;pointer-events:none;transition:.25s}
.float-top.show{opacity:.92;pointer-events:auto}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(0,180,216,.45)}70%{box-shadow:0 0 0 16px rgba(0,180,216,0)}100%{box-shadow:0 0 0 0 rgba(0,180,216,0)}}

/* ---------- 灯箱 ---------- */
.lightbox{position:fixed;inset:0;background:rgba(3,24,43,.9);z-index:500;display:none;align-items:center;justify-content:center;padding:40px}
.lightbox.open{display:flex}
.lightbox img{max-width:min(92vw,860px);max-height:88vh;border-radius:8px;box-shadow:0 10px 50px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:22px;right:30px;color:#fff;font-size:40px;line-height:1}

/* ---------- 提示框 ---------- */
.toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,80px);background:var(--deep);color:#fff;
  padding:14px 30px;border-radius:8px;border-left:4px solid var(--cyan);font-size:14.5px;z-index:600;opacity:0;transition:.35s;box-shadow:var(--shadow-lg)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 滚动显现动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .cards-grid,.cases-grid{grid-template-columns:repeat(2,1fr)}
  .strength-grid{grid-template-columns:repeat(2,1fr)}
  .certs-grid{grid-template-columns:repeat(2,1fr)}
  .proof-grid{grid-template-columns:repeat(4,1fr)}
  .timeline{grid-template-columns:repeat(3,1fr)}
  .timeline li::after{display:none}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-badge{left:14px}
}
@media (max-width:860px){
  .nav-menu{position:fixed;top:110px;left:0;right:0;background:#fff;flex-direction:column;padding:14px 24px 22px;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.25s;z-index:190}
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto}
  .nav-link{padding:12px 10px;border-bottom:1px solid var(--mist);border-radius:0}
  .nav-link.active::after{display:none}
  .hamburger{display:flex}
  .nav-cta{display:none}
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .footer-inner{grid-template-columns:1fr;gap:26px}
  .hero{min-height:560px}
}
@media (max-width:600px){
  .section{padding:64px 0}
  .section-dark{padding:64px 0}
  .cards-grid,.cases-grid,.certs-grid{grid-template-columns:1fr}
  .strength-grid{grid-template-columns:repeat(2,1fr)}
  .proof-grid{grid-template-columns:repeat(3,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .stat+.stat::before{display:none}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .form-row{grid-template-columns:1fr}
  .topbar-hide-m{display:none}
  .topbar-inner{justify-content:center}
  .topbar-left{display:none}
  .hero-content{padding-top:72px}
  .proof-img{height:150px}
}