/* ============================================================
   Sea Wing Marine Service Co., Ltd — Corporate Website
   ============================================================ */
:root{
  --navy:#0d2b45;
  --navy-deep:#081c30;
  --navy-soft:#123a5c;
  --blue:#0e7fd0;
  --blue-dark:#0b6ab0;
  --sky:#eaf4fb;
  --ink:#1c2b3a;
  --muted:#5b6b7a;
  --line:#dfe8ef;
  --gold:#d9a441;
  --green:#008e5e;
  --red:#a1262d;
  --white:#ffffff;
  --radius:14px;
  --shadow:0 10px 30px rgba(13,43,69,.10);
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"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);
  background:var(--white);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--blue);text-decoration:none;transition:color .2s;}
a:hover{color:var(--blue-dark);}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s,border-color .25s;
}
.site-header.scrolled{box-shadow:0 4px 20px rgba(13,43,69,.10);border-color:var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand img{height:46px;width:auto;}
.brand .brand-text{line-height:1.2;}
.brand .brand-cn{font-weight:700;font-size:17px;color:var(--navy);letter-spacing:.5px;}
.brand .brand-en{font-size:10.5px;color:var(--muted);letter-spacing:1.6px;text-transform:uppercase;}
.main-nav{display:flex;align-items:center;gap:34px;}
.main-nav a{color:var(--ink);font-size:15.5px;font-weight:500;padding:6px 0;position:relative;}
.main-nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--blue);transition:width .25s;}
.main-nav a:hover::after,.main-nav a.active::after{width:100%;}
.main-nav a.active{color:var(--blue);}
.header-cta{display:flex;align-items:center;gap:14px;}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.nav-toggle span{display:block;width:24px;height:2.5px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;border-radius:999px;
  font-size:15.5px;font-weight:600;cursor:pointer;border:none;
  transition:all .25s;font-family:inherit;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(14,127,208,.35);}
.btn-primary:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(14,127,208,.42);}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55);}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-outline{background:#fff;color:var(--blue);border:1.5px solid var(--blue);}
.btn-outline:hover{background:var(--blue);color:#fff;}
.btn-sm{padding:9px 20px;font-size:14px;}
.btn-white{background:#fff;color:var(--navy);}
.btn-white:hover{background:var(--sky);color:var(--navy);}

/* ---------- Language switch ---------- */
.lang-switch{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13.5px;font-weight:600;color:var(--blue);
  border:1.5px solid rgba(11,106,176,.35);border-radius:999px;
  padding:7px 16px;transition:all .2s;white-space:nowrap;
}
.lang-switch:hover{background:var(--blue);color:#fff;border-color:var(--blue);}
.lang-switch svg{width:15px;height:15px;flex-shrink:0;}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(140deg,#081c30 0%,#0d2b45 45%,#11456e 100%);
}
.hero-inner{position:relative;z-index:2;padding:120px 24px 150px;max-width:1180px;margin:0 auto;}
.hero .kicker{color:#7fc0e8;}
.hero h1{font-size:52px;font-weight:800;line-height:1.25;letter-spacing:1px;margin-bottom:10px;}
.hero .en-title{font-size:19px;font-weight:400;color:#9ec8e4;letter-spacing:2.5px;margin-bottom:26px;}
.hero p.lead{font-size:18px;color:#c6d9e8;max-width:640px;margin-bottom:40px;line-height:1.9;}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:46px;}
.hero-badges span{
  font-size:13px;color:#bfe0f5;border:1px solid rgba(255,255,255,.22);
  padding:7px 16px;border-radius:999px;background:rgba(255,255,255,.06);
}
.hero-wave{position:absolute;bottom:-2px;left:0;width:100%;z-index:1;}
.hero::before{
  content:"";position:absolute;top:-140px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,127,208,.35),transparent 65%);
}
.hero::after{
  content:"";position:absolute;bottom:120px;left:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(217,164,65,.12),transparent 65%);
}

/* ---------- Page hero (sub pages) ---------- */
.page-hero{background:linear-gradient(140deg,#081c30,#0d2b45 55%,#11456e);color:#fff;padding:78px 0 64px;position:relative;overflow:hidden;}
.page-hero::before{content:"";position:absolute;top:-120px;right:-100px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(14,127,208,.30),transparent 65%);}
.page-hero h1{font-size:40px;font-weight:800;position:relative;}
.page-hero .kicker{position:relative;}
.page-hero p{color:#b9d3e6;max-width:680px;margin-top:12px;position:relative;}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section.alt{background:var(--sky);}
.section.narrow{padding:72px 0;}
.kicker{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:3px;
  text-transform:uppercase;color:var(--blue);margin-bottom:10px;
}
.section-title{font-size:34px;font-weight:800;color:var(--navy);line-height:1.35;margin-bottom:14px;}
.section-sub{color:var(--muted);max-width:680px;font-size:16.5px;}
.center{text-align:center;}
.center .section-sub{margin-left:auto;margin-right:auto;}

/* ---------- Stats band ---------- */
.stats{background:var(--navy);color:#fff;padding:52px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;}
.stat b{display:block;font-size:42px;font-weight:800;color:#4db1ea;line-height:1.2;}
.stat .cn{font-size:15px;margin-top:4px;}
.stat .en{font-size:11px;color:#7fa5bd;letter-spacing:2px;text-transform:uppercase;}

/* ---------- Cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;transition:transform .3s,box-shadow .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.card h3{font-size:19px;color:var(--navy);margin:16px 0 10px;font-weight:700;}
.card p{font-size:14.5px;color:var(--muted);line-height:1.85;}
.card .ico{width:56px;height:56px;}
.card .ico svg{width:100%;height:100%;display:block;}
.card .more{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;}
.card .num{font-size:13px;font-weight:700;color:var(--blue);letter-spacing:2px;}

/* ---------- Strength list ---------- */
.strength{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .3s,box-shadow .3s;}
.strength:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.strength .s-ico{
  flex-shrink:0;width:48px;height:48px;border-radius:12px;background:var(--sky);
  display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--blue);font-weight:800;
}
.strength h3{font-size:17px;color:var(--navy);margin-bottom:6px;}
.strength p{font-size:14px;color:var(--muted);}

/* ---------- Certificates ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:36px;}
.cert{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:22px 12px;text-align:center;transition:transform .25s,box-shadow .25s;
}
.cert:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.cert b{display:block;font-size:24px;color:var(--navy);letter-spacing:1px;}
.cert span{display:block;font-size:12px;color:var(--muted);margin-top:4px;line-height:1.5;}
.cert-tags{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:18px;}
.cert-tags span{
  background:rgba(217,164,65,.14);color:#a97b1f;border:1px solid rgba(217,164,65,.4);
  font-size:13.5px;padding:8px 20px;border-radius:999px;font-weight:600;
}

/* ---------- Network / ports ---------- */
.ports{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:38px;}
.port-card{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 20px;text-align:center;
  transition:transform .25s,box-shadow .25s;
}
.port-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.port-card .p-type{font-size:11px;letter-spacing:2px;color:var(--blue);font-weight:700;text-transform:uppercase;}
.port-card h4{font-size:20px;color:var(--navy);margin:6px 0 2px;}
.port-card .p-en{font-size:12.5px;color:var(--muted);letter-spacing:1px;}

/* ---------- Process ---------- */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:40px;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;}
.step .n{
  width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:16px;
}
.step h4{font-size:17px;color:var(--navy);margin-bottom:6px;}
.step p{font-size:14px;color:var(--muted);}

/* ---------- Clients ---------- */
.clients{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;margin-top:36px;}
.client-chip{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:20px 36px;font-size:17px;font-weight:700;color:var(--navy);letter-spacing:1px;
  transition:transform .25s,box-shadow .25s,color .25s;
}
.client-chip:hover{transform:translateY(-4px);box-shadow:var(--shadow);color:var(--blue);}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,#0d2b45,#11456e);color:#fff;text-align:center;padding:78px 24px;
}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:12px;}
.cta-band p{color:#b9d3e6;margin-bottom:32px;font-size:16.5px;}
.cta-band .btn-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start;}
.info-item{display:flex;gap:16px;margin-bottom:26px;}
.info-item .i-ico{
  width:48px;height:48px;border-radius:12px;background:var(--sky);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
}
.info-item h4{font-size:15px;color:var(--navy);margin-bottom:3px;}
.info-item p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.info-item p b{color:var(--ink);font-weight:600;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px;box-shadow:var(--shadow);}
.form-card h3{font-size:20px;color:var(--navy);margin-bottom:20px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-group{margin-bottom:16px;}
.form-group label{display:block;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:6px;}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;
  font-size:14.5px;font-family:inherit;color:var(--ink);background:#fbfdfe;transition:border-color .2s;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--blue);}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;}

/* ---------- Workshop address table ---------- */
.addr-table{width:100%;border-collapse:collapse;margin-top:34px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);}
.addr-table th{background:var(--navy);color:#fff;font-size:14px;padding:14px 18px;text-align:left;font-weight:600;}
.addr-table td{padding:14px 18px;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink);vertical-align:top;}
.addr-table tr:last-child td{border-bottom:none;}
.addr-table td:first-child{font-weight:700;color:var(--navy);white-space:nowrap;}
.addr-table .en-addr{display:block;color:var(--muted);font-size:12.5px;margin-top:3px;}

/* ---------- About page ---------- */
.about-lead{font-size:17.5px;color:var(--ink);max-width:820px;line-height:2;}
.about-en{font-size:15px;color:var(--muted);max-width:820px;line-height:1.9;margin-top:18px;font-style:italic;}
.value-card{text-align:center;padding:38px 30px;}
.value-card .v-ico{font-size:34px;margin-bottom:14px;}
.mission-band{background:linear-gradient(120deg,#081c30,#0d2b45);border-radius:20px;color:#fff;padding:56px;margin-top:60px;position:relative;overflow:hidden;}
.mission-band::before{content:"";position:absolute;top:-90px;right:-70px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(14,127,208,.3),transparent 65%);}
.mission-band h3{font-size:24px;font-weight:800;margin-bottom:14px;position:relative;}
.mission-band p{color:#c6d9e8;max-width:760px;position:relative;line-height:1.95;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-deep);color:#9fb6c8;padding:64px 0 0;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600;letter-spacing:.5px;}
.site-footer ul{list-style:none;}
.site-footer li{margin-bottom:10px;}
.site-footer a{color:#9fb6c8;}
.site-footer a:hover{color:#fff;}
.footer-brand img{background:#fff;border-radius:10px;padding:6px;height:52px;width:auto;margin-bottom:14px;}
.footer-brand p{line-height:1.9;}
.footer-contact li{display:flex;gap:8px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);padding:20px 0;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#6c8296;
}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease;}
.reveal.visible{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .grid-3,.grid-4,.cert-grid,.ports,.process{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:34px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:40px;}
  .contact-grid{grid-template-columns:1fr;}
  .section{padding:72px 0;}
}
@media (max-width:680px){
  .main-nav{
    display:none;position:absolute;top:74px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;padding:18px 24px 24px;gap:16px;
    border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(13,43,69,.12);
  }
  .main-nav.open{display:flex;}
  .nav-toggle{display:block;}
  .header-cta .btn{display:none;}
  .grid-3,.grid-4,.cert-grid,.ports,.process,.form-row{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;}
  .hero h1{font-size:31px;}
  .hero .en-title{font-size:15px;letter-spacing:1.5px;}
  .hero-inner{padding:80px 24px 120px;}
  .section-title{font-size:26px;}
  .page-hero h1{font-size:30px;}
  .mission-band{padding:36px 26px;}
  .form-card{padding:26px 22px;}
}