/* ============ TOKENS ============ */
:root{
  --navy:#0a1b33;
  --navy-2:#0d2645;
  --blue:#1c4fb3;
  --blue-bright:#2f7dff;
  --cyan:#39b7ff;
  --amber:#ff9d2e;
  --amber-2:#ffbe5c;
  --ink:#0a1626;
  --muted:#5b6b82;
  --line:#e4e9f1;
  --bg:#f5f8fc;
  --white:#ffffff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px -28px rgba(10,27,51,.45);
  --shadow-soft:0 12px 40px -20px rgba(10,27,51,.3);
  --maxw:1200px;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Noto Sans SC',system-ui,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{font-family:'Sora','Noto Sans SC',sans-serif;line-height:1.12;letter-spacing:-.02em}
/* Chinese: relax tight latin tracking + lift line-height for legibility */
body.lang-zh{font-family:'Noto Sans SC','Inter',system-ui,sans-serif}
body.lang-zh h1,body.lang-zh h2,body.lang-zh h3,body.lang-zh h4,body.lang-zh h5{font-family:'Noto Sans SC','Sora',sans-serif;letter-spacing:0;line-height:1.25}
body.lang-zh .hero__eyebrow,body.lang-zh .head__tag{letter-spacing:.08em}
body.lang-zh .hero__title{line-height:1.2}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:110px 0}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:'Sora',sans-serif;font-weight:600;font-size:.95rem;
  padding:14px 26px;border-radius:50px;border:1px solid transparent;
  cursor:pointer;transition:all .35s var(--ease);white-space:nowrap;
}
.btn--primary{background:linear-gradient(120deg,var(--amber),var(--amber-2));color:#241300;box-shadow:0 14px 30px -12px rgba(255,157,46,.7)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 22px 42px -14px rgba(255,157,46,.85)}
.btn--ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.4);backdrop-filter:blur(8px)}
.btn--ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-3px)}
.btn--nav{padding:10px 20px;background:linear-gradient(120deg,var(--amber),var(--amber-2));color:#241300}
.btn--nav:hover{transform:translateY(-2px)}
.btn--full{width:100%}

/* ============ NAV ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .4s var(--ease);padding:18px 0}
.nav.scrolled{background:rgba(10,27,51,.92);backdrop-filter:blur(14px);padding:10px 0;box-shadow:0 10px 40px -20px rgba(0,0,0,.6)}
.nav__inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}
.brand__logo{height:58px;width:auto;filter:drop-shadow(0 2px 10px rgba(0,0,0,.35))}
.brand__text{font-family:'Sora',sans-serif;font-weight:800;font-size:1.05rem;letter-spacing:.04em;color:#fff;display:flex;flex-direction:column;line-height:1}
.brand__text small{font-size:.58rem;font-weight:500;letter-spacing:.22em;color:var(--amber-2);margin-top:3px}
.nav__links{display:flex;align-items:center;gap:30px}
.nav__links a{font-weight:500;font-size:.95rem;color:rgba(255,255,255,.85);transition:color .25s}
.nav__links a:hover{color:#fff}
.nav__links a.btn--nav{color:#241300}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav__toggle span{width:26px;height:2px;background:#fff;border-radius:2px;transition:.3s}
/* language switch */
.lang-switch{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);border-radius:50px;padding:6px 14px;cursor:pointer;font-family:'Sora',sans-serif;font-weight:600;font-size:.82rem;color:rgba(255,255,255,.6);transition:.3s}
.lang-switch:hover{background:rgba(255,255,255,.16)}
.lang-switch__opt{transition:color .25s}
.lang-switch__opt.is-active{color:var(--amber-2)}
.lang-switch__sep{color:rgba(255,255,255,.3)}

/* ============ HERO ============ */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  background:url('assets/hero.jpg') center/cover no-repeat fixed;
  color:#fff;overflow:hidden;
}
.hero__overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 80% 10%,rgba(57,183,255,.18),transparent 55%),
    linear-gradient(105deg,rgba(8,20,38,.94) 0%,rgba(8,20,38,.78) 42%,rgba(8,20,38,.42) 100%);
}
.hero__inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:120px 24px 80px;width:100%}
.hero__eyebrow{
  display:inline-block;font-family:'Sora',sans-serif;font-weight:600;font-size:.72rem;
  letter-spacing:.28em;color:var(--amber-2);padding:9px 18px;border:1px solid rgba(255,190,92,.35);
  border-radius:50px;background:rgba(255,190,92,.07);margin-bottom:28px;
}
.hero__title{font-size:clamp(2.1rem,4.8vw,3.7rem);font-weight:800;margin-bottom:24px;text-shadow:0 6px 30px rgba(0,0,0,.4)}
.grad{background:linear-gradient(110deg,var(--amber),var(--amber-2) 50%,var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero__lead{font-size:clamp(1.02rem,1.5vw,1.22rem);max-width:640px;color:rgba(255,255,255,.85);margin-bottom:38px}
.hero__cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:64px}
.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:780px;border-top:1px solid rgba(255,255,255,.16);padding-top:34px;align-items:start}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{display:block;font-family:'Sora',sans-serif;font-weight:800;font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.05;white-space:nowrap;background:linear-gradient(120deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat__label{font-size:.82rem;color:rgba(255,255,255,.7);letter-spacing:.02em}
.hero__scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2;width:26px;height:42px;border:2px solid rgba(255,255,255,.5);border-radius:20px}
.hero__scroll span{position:absolute;top:8px;left:50%;transform:translateX(-50%);width:4px;height:8px;background:var(--amber-2);border-radius:2px;animation:scroll 1.6s var(--ease) infinite}
@keyframes scroll{0%{opacity:0;top:8px}40%{opacity:1}80%{opacity:0;top:22px}100%{opacity:0}}

/* ============ MARQUEE ============ */
.marquee{background:var(--navy);overflow:hidden;padding:18px 0;border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.marquee__track{display:flex;align-items:center;gap:28px;white-space:nowrap;width:max-content;animation:marquee 32s linear infinite}
.marquee__track span{font-family:'Sora',sans-serif;font-weight:700;font-size:1rem;letter-spacing:.14em;color:rgba(255,255,255,.78)}
.marquee__track i{color:var(--amber);font-style:normal;font-size:.7rem}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ============ HEADERS ============ */
.head{max-width:720px;margin:0 auto 64px;text-align:center}
.head__tag{display:inline-block;font-family:'Sora',sans-serif;font-weight:700;font-size:.74rem;letter-spacing:.24em;color:var(--blue);padding:7px 16px;border-radius:50px;background:rgba(28,79,179,.09);margin-bottom:18px}
.head__title{font-size:clamp(1.6rem,3vw,2.35rem);font-weight:700;color:var(--navy);margin-bottom:18px}
.head__sub{color:var(--muted);font-size:1.06rem}
.head--light .head__tag{color:var(--amber-2);background:rgba(255,190,92,.12)}
.head--light .head__title{color:#fff}
.head--light .head__sub{color:rgba(255,255,255,.78)}

/* ============ COMPANY ============ */
.company{background:var(--white)}
.company__body{max-width:860px;margin:0 auto;text-align:center}
.company__body p{color:var(--muted);font-size:1.08rem;margin-bottom:20px}
.company__close{color:var(--navy)!important;font-family:'Sora','Noto Sans SC',sans-serif;font-weight:600;font-size:1.18rem!important;margin-top:8px}
body.lang-zh .company__close{font-family:'Noto Sans SC','Sora',sans-serif}

/* ============ SERVICES ============ */
.services{background:var(--white)}
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.svc{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-soft);transition:transform .5s var(--ease),box-shadow .5s var(--ease);display:flex;flex-direction:column}
.svc:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.svc__media{position:relative;height:230px;overflow:hidden}
.svc__media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.svc:hover .svc__media img{transform:scale(1.07)}
.svc__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(10,27,51,.55))}
.svc__no{position:absolute;top:18px;left:20px;z-index:2;font-family:'Sora',sans-serif;font-weight:800;font-size:1.1rem;color:#fff;background:linear-gradient(120deg,var(--amber),var(--amber-2));width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px -10px rgba(255,157,46,.8)}
.svc__body{padding:30px 30px 34px}
.svc__body h3{font-size:1.45rem;color:var(--navy);margin-bottom:12px}
.svc__body>p{color:var(--muted);margin-bottom:20px}
.svc__body ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:9px 18px}
.svc__body li{position:relative;padding-left:22px;font-size:.92rem;color:#33445c}
.svc__body li::before{content:"";position:absolute;left:0;top:.55em;width:9px;height:9px;border-radius:3px;background:linear-gradient(120deg,var(--blue),var(--cyan))}
/* lone last card (odd count) -> full-width horizontal */
@media(min-width:981px){
  .svc-grid>.svc:last-child:nth-child(odd){grid-column:1 / -1;flex-direction:row}
  .svc-grid>.svc:last-child:nth-child(odd) .svc__media{width:46%;height:auto;flex:none}
  .svc-grid>.svc:last-child:nth-child(odd) .svc__body{flex:1;display:flex;flex-direction:column;justify-content:center}
}

/* ============ ABOUT ============ */
.about{background:var(--bg)}
.about__grid{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.about__media{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.about__media img{width:100%;height:520px;object-fit:cover}
.about__badge{position:absolute;left:24px;bottom:24px;background:rgba(10,27,51,.86);backdrop-filter:blur(8px);color:#fff;padding:18px 22px;border-radius:14px;border:1px solid rgba(255,190,92,.3)}
.about__badge strong{display:block;font-family:'Sora',sans-serif;font-size:1.3rem;color:var(--amber-2)}
.about__badge span{font-size:.82rem;color:rgba(255,255,255,.8)}
.about__text .head__title{text-align:left;margin-bottom:22px}
.about__text .head__tag{margin-bottom:16px}
.about__text p{color:var(--muted);margin-bottom:16px}
.about__points{margin-top:28px;display:grid;gap:16px}
.about__points div{padding-left:20px;border-left:3px solid var(--amber)}
.about__points b{display:block;font-family:'Sora',sans-serif;color:var(--navy);font-size:1.02rem}
.about__points span{color:var(--muted);font-size:.92rem}

/* ============ TRACKING ============ */
.tracking{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#10325f 100%);position:relative;overflow:hidden}
.tracking::before{content:"";position:absolute;inset:0;background:url('assets/routes.jpg') center/cover;opacity:.10;mix-blend-mode:luminosity}
.tracking .container{position:relative;z-index:2}
.track-card{max-width:860px;margin:0 auto;background:rgba(255,255,255,.06);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.track-tabs{display:flex;gap:10px;margin-bottom:20px}
.track-tab{flex:1;padding:13px;border-radius:12px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.04);color:rgba(255,255,255,.7);font-family:'Sora',sans-serif;font-weight:600;font-size:.92rem;cursor:pointer;transition:.3s}
.track-tab.is-active{background:linear-gradient(120deg,var(--amber),var(--amber-2));color:#241300;border-color:transparent}
.track-form{display:flex;gap:12px}
.track-form input{flex:1;padding:16px 20px;border-radius:50px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.95);font-size:1rem;color:var(--ink);font-family:'Inter',sans-serif}
.track-form input:focus{outline:2px solid var(--amber)}
.track-result{margin-top:30px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14)}
.track-result__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}
.track-result__ref{font-family:'Sora',sans-serif;font-weight:700;color:#fff;font-size:1.1rem}
.track-result__status{font-family:'Sora',sans-serif;font-weight:700;font-size:.74rem;letter-spacing:.12em;color:#0a1b33;background:var(--amber-2);padding:6px 14px;border-radius:50px}
.track-steps{display:flex;justify-content:space-between;position:relative;gap:8px}
.track-steps::before{content:"";position:absolute;top:11px;left:5%;right:5%;height:2px;background:rgba(255,255,255,.16)}
.track-step{position:relative;z-index:2;flex:1;text-align:center}
.track-step i{display:block;width:24px;height:24px;border-radius:50%;background:#1a3358;border:2px solid rgba(255,255,255,.3);margin:0 auto 12px}
.track-step.done i{background:var(--cyan);border-color:var(--cyan)}
.track-step.active i{background:var(--amber);border-color:var(--amber);box-shadow:0 0 0 6px rgba(255,157,46,.25);animation:pulse 1.8s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 11px rgba(255,157,46,.05)}}
.track-step b{display:block;font-family:'Sora',sans-serif;font-size:.82rem;color:#fff}
.track-step span{font-size:.72rem;color:rgba(255,255,255,.6)}
.track-note{margin-top:26px;font-size:.86rem;color:rgba(255,255,255,.62);text-align:center}
.track-note a{color:var(--amber-2);text-decoration:underline}

/* ============ WHY ============ */
.why{background:var(--bg)}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-card{padding:30px 26px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--white);transition:.45s var(--ease);position:relative;overflow:hidden}
.why-card::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--amber),var(--cyan));transition:width .45s var(--ease)}
.why-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-soft);border-color:transparent}
.why-card:hover::before{width:100%}
.why-card span{font-family:'Sora',sans-serif;font-weight:800;font-size:1.6rem;background:linear-gradient(120deg,var(--blue),var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.why-card h4{font-size:1.08rem;color:var(--navy);margin:14px 0 8px}
.why-card p{font-size:.9rem;color:var(--muted)}

/* ============ CTA BANNER ============ */
.cta-banner{position:relative;padding:96px 0;background:url('assets/aerial.jpg') center/cover fixed;color:#fff;text-align:center}
.cta-banner__overlay{position:absolute;inset:0;background:linear-gradient(120deg,rgba(8,20,38,.92),rgba(28,79,179,.72))}
.cta-banner__inner{position:relative;z-index:2;max-width:760px}
.cta-banner h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin-bottom:16px}
.cta-banner p{color:rgba(255,255,255,.85);font-size:1.08rem;margin-bottom:30px}

/* ============ CONTACT ============ */
.contact{background:var(--bg)}
.contact__grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.contact__info .head__title{text-align:left;margin-bottom:30px}
.contact__list{list-style:none;display:grid;gap:22px}
.contact__list li{display:flex;gap:18px;align-items:flex-start}
.contact__ic{flex:none;width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;background:linear-gradient(135deg,var(--navy),var(--blue));color:var(--amber-2)}
.contact__list b{display:block;font-family:'Sora',sans-serif;color:var(--navy);margin-bottom:2px}
.contact__list span,.contact__list a{color:var(--muted);font-size:.96rem}
.contact__list a:hover{color:var(--blue)}
.contact__form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:38px;box-shadow:var(--shadow-soft)}
.contact__form h3{font-size:1.4rem;color:var(--navy);margin-bottom:22px}
.contact__form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact__form label{display:block;font-size:.84rem;font-weight:600;color:var(--navy);margin-bottom:16px;font-family:'Sora',sans-serif}
.contact__form input,.contact__form select,.contact__form textarea{width:100%;margin-top:7px;padding:13px 15px;border:1px solid var(--line);border-radius:10px;font-family:'Inter',sans-serif;font-size:.95rem;color:var(--ink);background:#fafcff;transition:.25s}
.contact__form input:focus,.contact__form select:focus,.contact__form textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(28,79,179,.1)}
.contact__form textarea{resize:vertical}
.contact__ok{margin-top:16px;color:#0a8a4a;font-weight:600;font-size:.92rem;text-align:center}

/* ============ FOOTER ============ */
.footer{background:var(--navy);color:rgba(255,255,255,.7);padding:70px 0 0}
.footer__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.brand--footer .brand__text{color:#fff}
.footer__brand p{margin-top:18px;font-size:.92rem;max-width:300px}
.footer__col h5{font-family:'Sora',sans-serif;color:#fff;font-size:1rem;margin-bottom:18px;letter-spacing:.02em}
.footer__col a,.footer__col span{display:block;font-size:.92rem;color:rgba(255,255,255,.65);margin-bottom:11px;transition:color .25s}
.footer__col a:hover{color:var(--amber-2)}
.footer__bar{border-top:1px solid rgba(255,255,255,.1);padding:22px 0}
.footer__bar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.85rem;color:rgba(255,255,255,.5)}

/* ============ REVEAL ============ */
[data-reveal]{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media(max-width:980px){
  .svc-grid{grid-template-columns:1fr}
  .about__grid,.contact__grid{grid-template-columns:1fr;gap:40px}
  .about__media img{height:400px}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .footer__inner{grid-template-columns:1fr 1fr;gap:32px}
  .hero{background-attachment:scroll}
  .cta-banner{background-attachment:scroll}
}
@media(max-width:760px){
  .section{padding:72px 0}
  .nav__links{position:fixed;inset:0 0 0 auto;width:78%;max-width:320px;flex-direction:column;align-items:flex-start;justify-content:center;gap:24px;background:rgba(10,27,51,.98);backdrop-filter:blur(16px);padding:40px;transform:translateX(100%);transition:transform .4s var(--ease);font-size:1.15rem}
  .nav__links.open{transform:none}
  .nav__toggle{display:flex;z-index:101}
  .nav.menu-open .nav__toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.menu-open .nav__toggle span:nth-child(2){opacity:0}
  .nav.menu-open .nav__toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero__stats{grid-template-columns:1fr 1fr;gap:20px}
  .svc__body ul{grid-template-columns:1fr}
  .track-form{flex-direction:column}
  .track-form input{border-radius:14px}
  .track-steps{flex-wrap:wrap;gap:18px}
  .track-step{flex:0 0 45%}
  .track-steps::before{display:none}
  .contact__form .row{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
}
@media(max-width:420px){
  .brand__text{font-size:.92rem}
  .hero__stats{grid-template-columns:1fr 1fr}
}