/* ============ LANOU Landing Page ============ */
:root{
  --blue:#1b5cab;
  --blue-dark:#123f78;
  --red:#e2231a;
  --ink:#16243a;
  --muted:#5c6b80;
  --bg:#f5f8fc;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 10px 30px rgba(18,63,120,.10);
  --shadow-lg:0 24px 60px rgba(18,63,120,.18);
  --font-head:'Sora',sans-serif;
  --font-body:'Inter',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font-body);color:var(--ink);background:var(--white);line-height:1.65;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,92%);margin-inline:auto}
.section{padding:96px 0}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:14px 32px;border-radius:999px;font-weight:600;font-size:.95rem;transition:transform .3s,box-shadow .3s,background .3s;will-change:transform}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;box-shadow:0 8px 24px rgba(27,92,171,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(27,92,171,.45)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}

/* ---------- Header ---------- */
.header{position:fixed;inset:0 0 auto;z-index:100;padding:14px 0;transition:background .35s,box-shadow .35s,padding .35s}
.header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(14px);box-shadow:0 4px 24px rgba(18,63,120,.10);padding:8px 0}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{height:44px;width:auto;background:#fff;border-radius:10px;padding:4px;box-shadow:0 2px 10px rgba(0,0,0,.12);transition:transform .3s}
.brand:hover img{transform:rotate(-6deg) scale(1.05)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-family:var(--font-head);font-size:.98rem;font-weight:800;letter-spacing:.06em;color:#fff;transition:color .35s;white-space:nowrap}
.brand-text small{font-size:.55rem;font-weight:500;letter-spacing:.02em;text-transform:uppercase;color:rgba(255,255,255,.72);transition:color .35s;white-space:nowrap}
.header.scrolled .brand-text strong{color:var(--blue)}
.header.scrolled .brand-text small{color:var(--muted)}
.nav{display:flex;align-items:center;gap:2px}
.nav a{position:relative;padding:8px 10px;font-size:.84rem;font-weight:500;color:rgba(255,255,255,.92);transition:color .3s;white-space:nowrap}
.header.scrolled .nav a{color:var(--ink)}
.nav a:not(.nav-cta)::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--red);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .3s}
.nav a:not(.nav-cta):hover::after,.nav a.active:not(.nav-cta)::after{transform:scaleX(1)}
.nav-cta{background:var(--red);color:#fff!important;border-radius:999px;padding:9px 20px!important;margin-left:6px;box-shadow:0 6px 18px rgba(226,35,26,.35);transition:transform .3s,box-shadow .3s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(226,35,26,.45)}
.hamburger{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:6px;z-index:110}
.hamburger span{width:26px;height:2.5px;background:#fff;border-radius:2px;transition:all .35s}
.header.scrolled .hamburger span{background:var(--ink)}
.hamburger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url("../assets/img/factory.jpg") center/cover no-repeat;animation:kenburns 18s ease-in-out infinite alternate}
@keyframes kenburns{from{transform:scale(1)}to{transform:scale(1.12)}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(105deg,rgba(10,30,60,.88) 0%,rgba(18,63,120,.72) 45%,rgba(18,63,120,.35) 100%)}
.hero-content{position:relative;z-index:2;padding:140px 0 90px}
.hero-kicker{font-size:.8rem;letter-spacing:.28em;text-transform:uppercase;color:#9ec5f5;font-weight:600}
.hero h1{font-family:var(--font-head);font-size:clamp(2.1rem,4.6vw,3.7rem);font-weight:800;line-height:1.15;margin:18px 0 20px}
.grad{background:linear-gradient(90deg,#7db6f7,#fff 55%,#ff8f88);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:640px;font-size:1.06rem;color:rgba(255,255,255,.85)}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-stats{display:flex;gap:clamp(24px,5vw,64px);margin-top:64px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column}
.stat small{color:rgba(255,255,255,.7);font-size:.8rem;margin-top:2px}
.stat-num,.stat-plus{font-family:var(--font-head);font-size:2.2rem;font-weight:800;display:inline}
.stat-plus:empty::before{content:"\00a0"}
.stat-plus{color:var(--red)}
.stat-num{color:#fff}
.reveal-hero{opacity:0;transform:translateY(34px);animation:heroUp .9s cubic-bezier(.22,.8,.3,1) forwards;animation-delay:var(--d,0s)}
@keyframes heroUp{to{opacity:1;transform:none}}
.scroll-hint{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:26px;height:44px;border:2px solid rgba(255,255,255,.55);border-radius:14px;z-index:2}
.scroll-hint span{position:absolute;left:50%;top:8px;width:4px;height:9px;margin-left:-2px;background:#fff;border-radius:2px;animation:wheel 1.6s ease-in-out infinite}
@keyframes wheel{0%{opacity:1;transform:translateY(0)}70%{opacity:0;transform:translateY(16px)}100%{opacity:0}}

/* ---------- Section headings ---------- */
.section-kicker{font-size:.78rem;letter-spacing:.26em;text-transform:uppercase;font-weight:700;color:var(--red)}
.section-title{font-family:var(--font-head);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;line-height:1.25;margin:10px 0 22px}
.section-kicker.light{color:#ffb3ae}
.section-title.light{color:#fff}

/* ---------- About ---------- */
.about{background:var(--bg)}
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.about-media{position:relative}
.about-media img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.about-badge{position:absolute;right:-22px;bottom:-22px;background:#fff;border-radius:14px;padding:16px 22px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;border-left:4px solid var(--red)}
.about-badge strong{font-family:var(--font-head);color:var(--blue);font-size:1.15rem}
.about-badge small{color:var(--muted);font-size:.78rem}
.float{animation:float 4.5s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.about-text p{color:var(--muted);margin-bottom:14px}
.about-points{list-style:none;margin:22px 0 30px;display:grid;gap:12px}
.about-points li{display:flex;align-items:flex-start;gap:12px;font-weight:500}
.check{flex:none;width:22px;height:22px;margin-top:2px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--blue-dark));position:relative}
.check::after{content:"";position:absolute;left:7px;top:4px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}

/* ---------- Marquee ---------- */
.marquee{background:linear-gradient(90deg,var(--blue-dark),var(--blue));overflow:hidden;padding:16px 0}
.marquee-track{display:flex;gap:36px;align-items:center;width:max-content;animation:marquee 28s linear infinite}
.marquee-track span{font-family:var(--font-head);font-weight:700;color:#fff;font-size:1rem;letter-spacing:.06em;white-space:nowrap}
.marquee-track i{color:var(--red);font-style:normal;font-size:1.2rem}
@keyframes marquee{to{transform:translateX(-50%)}}
.marquee:hover .marquee-track{animation-play-state:paused}

/* ---------- Product sections ---------- */
.product-section{padding:88px 0 40px}
.product-section:nth-of-type(even){background:var(--bg)}
.product-section .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px;flex-wrap:wrap}
.count-pill{background:rgba(27,92,171,.1);color:var(--blue);font-weight:700;font-size:.82rem;padding:7px 16px;border-radius:999px;white-space:nowrap}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:26px;padding-bottom:48px}
.product-card{background:#fff;border-radius:var(--radius);padding:26px 20px 22px;text-align:center;box-shadow:var(--shadow);cursor:pointer;position:relative;overflow:hidden;transition:transform .4s cubic-bezier(.22,.8,.3,1),box-shadow .4s;
  opacity:0;transform:translateY(36px)}
.product-card.shown{opacity:1;transform:none;transition:transform .7s cubic-bezier(.22,.8,.3,1),box-shadow .4s,opacity .7s}
.product-card::before{content:"";position:absolute;inset:auto 0 0 0;height:4px;background:linear-gradient(90deg,var(--blue),var(--red));transform:scaleX(0);transform-origin:left;transition:transform .45s}
.product-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}
.product-card:hover::before{transform:scaleX(1)}
.product-thumb{height:210px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.product-thumb img{max-height:100%;width:auto;object-fit:contain;transition:transform .5s cubic-bezier(.22,.8,.3,1);filter:drop-shadow(0 12px 18px rgba(18,63,120,.14))}
.product-card:hover .product-thumb img{transform:scale(1.08) rotate(-1.5deg)}
.product-card h3{font-family:var(--font-head);font-size:1.02rem;font-weight:700;letter-spacing:.04em}
.product-card small{color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.1em}
.product-card .quick{display:inline-block;margin-top:12px;font-size:.8rem;font-weight:600;color:var(--blue);opacity:0;transform:translateY(6px);transition:opacity .35s,transform .35s}
.product-card:hover .quick{opacity:1;transform:none}

/* ---------- Contact ---------- */
.contact{background:linear-gradient(135deg,#0d2c55 0%,var(--blue-dark) 55%,var(--blue) 100%);color:#fff;text-align:center}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:52px}
.contact-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:38px 26px;backdrop-filter:blur(8px);transition:transform .4s,background .4s;display:block}
.contact-card:hover{transform:translateY(-8px);background:rgba(255,255,255,.13)}
.contact-icon{width:60px;height:60px;margin:0 auto 18px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:#fff;transition:background .4s,transform .4s,color .4s}
.contact-icon svg{width:26px;height:26px}
.contact-card:hover .contact-icon{background:var(--red);border-color:var(--red);transform:scale(1.1) rotate(-6deg)}
.contact-card h3{font-family:var(--font-head);font-size:1.05rem;margin-bottom:8px}
.contact-card p{color:rgba(255,255,255,.82);font-size:.94rem;word-break:break-all}

/* ---------- Footer ---------- */
.footer{background:#0a1e3c;color:rgba(255,255,255,.65);padding:34px 0}
.footer-inner{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;text-align:center;font-size:.85rem}
.footer-logo{height:38px;background:#fff;border-radius:8px;padding:4px}

/* ---------- Back to top ---------- */
.back-top{position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;border:0;background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transform:translateY(16px);transition:opacity .35s,transform .35s;z-index:90}
.back-top.show{opacity:1;pointer-events:auto;transform:none}
.back-top:hover{transform:translateY(-4px)}

/* ---------- Modal ---------- */
.modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s}
.modal.open{opacity:1;pointer-events:auto}
.modal-backdrop{position:absolute;inset:0;background:rgba(10,25,50,.72);backdrop-filter:blur(6px)}
.modal-box{position:relative;background:#fff;border-radius:20px;width:min(880px,92%);max-height:88vh;display:flex;gap:30px;padding:40px;box-shadow:var(--shadow-lg);transform:scale(.92) translateY(20px);transition:transform .35s cubic-bezier(.22,.8,.3,1)}
.modal.open .modal-box{transform:none}
.modal-box img{width:52%;object-fit:contain;max-height:70vh}
.modal-info{display:flex;flex-direction:column;justify-content:center;gap:10px}
.modal-info small{color:var(--red);font-weight:700;letter-spacing:.18em;text-transform:uppercase;font-size:.75rem}
.modal-info h3{font-family:var(--font-head);font-size:1.8rem}
.modal-info .btn{margin-top:14px;align-self:flex-start}
.modal-close{position:absolute;top:14px;right:18px;background:none;border:0;font-size:2rem;color:var(--muted);cursor:pointer;line-height:1;transition:color .3s,transform .3s}
.modal-close:hover{color:var(--red);transform:rotate(90deg)}

/* ---------- Contact modal (Send Inquiry) ---------- */
.contact-modal-box{flex-direction:column;align-items:center;text-align:center;gap:8px;width:min(860px,92%);overflow-y:auto;background:linear-gradient(135deg,#0d2c55 0%,var(--blue-dark) 55%,var(--blue) 100%);color:#fff}
.contact-modal-box>h3{font-family:var(--font-head);font-size:1.7rem;line-height:1.3}
.contact-modal-product{color:rgba(255,255,255,.75);font-size:.95rem;margin-top:2px}
.contact-modal-grid{margin-top:26px;gap:18px;width:100%}
.contact-modal-box .contact-card{padding:28px 20px}
.contact-modal-box .modal-close{color:rgba(255,255,255,.7)}
.contact-modal-box .modal-close:hover{color:var(--red)}
@media (max-width:1020px){
  .contact-modal-grid{grid-template-columns:1fr;max-width:420px;margin-inline:auto}
}

/* ---------- Scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.22,.8,.3,1),transform .8s cubic-bezier(.22,.8,.3,1);transition-delay:var(--d,0s)}
.reveal.shown{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1360px){
  .brand-text small{display:none}
  .brand-text strong{font-size:1.04rem}
}
@media (max-width:1180px) and (min-width:1021px){
  .nav a{padding:8px 7px;font-size:.8rem}
  .nav-cta{padding:8px 16px!important}
}
@media (max-width:1020px){
  /* backdrop-filter 会让 header 成为 fixed 导航的定位基准，手机版改用不透明背景 */
  .header.scrolled{-webkit-backdrop-filter:none;backdrop-filter:none;background:#fff}
  .nav{position:fixed;inset:0;background:rgba(13,44,85,.97);backdrop-filter:blur(12px);flex-direction:column;justify-content:center;gap:14px;transform:translateX(100%);transition:transform .45s cubic-bezier(.22,.8,.3,1)}
  .nav.open{transform:none}
  .nav a{color:#fff!important;font-size:1.15rem}
  .hamburger{display:flex}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .about-badge{right:10px;bottom:-18px}
  .contact-grid{grid-template-columns:1fr;max-width:460px;margin-inline:auto}
  .modal-box{flex-direction:column;overflow-y:auto;padding:28px;text-align:center}
  .modal-box img{width:100%;max-height:44vh}
  .modal-info .btn{align-self:center}
}
@media (max-width:560px){
  .section{padding:64px 0}
  .brand img{height:40px}
  .brand-text strong{font-size:.95rem;letter-spacing:.12em}
  .brand-text small{display:none}
  .hero-stats{gap:20px}
  .stat-num,.stat-plus{font-size:1.6rem}
  .product-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
  .product-thumb{height:150px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal,.product-card,.reveal-hero{opacity:1;transform:none}
}