/*
Theme Name: Young Sun Develop
Theme URI: https://www.ysd.com.tw/
Author: Young Sun Develop Co.
Description: Simple multilingual corporate website theme for Young Sun Develop Co.
Version: 1.0.0
Text Domain: ysd
*/
:root{
  --ysd-blue:#1456a0;
  --ink:#171717;
  --muted:#6b6b6b;
  --line:#e9e9e9;
  --soft:#f7f7f5;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","Noto Sans JP",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.85}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--max);margin:auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand img{display:block;width:176px;height:auto}
.nav{display:flex;align-items:center;gap:24px;font-size:14px}
.nav a{padding:8px 0;color:#333}
.nav a:hover{color:var(--ysd-blue)}
.lang{display:flex;gap:8px;border-left:1px solid var(--line);padding-left:18px}
.lang a{font-weight:600}
.lang a.active{color:var(--ysd-blue)}
.hero{min-height:590px;display:flex;align-items:center;background:linear-gradient(135deg,#fff 0%,#fafafa 70%,#f5f5f3 100%)}
.hero-inner{max-width:var(--max);width:100%;margin:auto;padding:90px 24px}
.kicker{font-size:13px;letter-spacing:.16em;color:var(--ysd-blue);font-weight:700;margin-bottom:18px}
.hero h1{font-size:clamp(38px,6vw,72px);line-height:1.12;letter-spacing:-.03em;margin:0 0 22px;font-weight:700}
.hero p{max-width:720px;font-size:20px;color:#4a4a4a;margin:0}
.hero-mark{margin-top:48px;width:100px;height:5px;background:var(--ysd-blue)}
.section{padding:92px 24px}
.section.alt{background:var(--soft)}
.section-inner{max-width:var(--max);margin:auto}
.section-title{font-size:13px;letter-spacing:.16em;color:var(--ysd-blue);font-weight:700;margin:0 0 10px}
.section h2{font-size:clamp(30px,4vw,48px);line-height:1.25;margin:0 0 26px}
.lead{font-size:18px;color:#444;max-width:880px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;margin-top:44px}
.card{border:1px solid var(--line);padding:32px;background:#fff}
.card h3{margin:0 0 10px;font-size:22px}
.card p{margin:0;color:#555}
.values{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px}
.value{padding:26px 20px;background:#fff;border-top:3px solid var(--ysd-blue)}
.value strong{display:block;font-size:20px;margin-bottom:6px}
.logo-concept{display:grid;grid-template-columns:320px 1fr;gap:70px;align-items:center}
.logo-show{padding:24px;background:#fff;border:1px solid var(--line)}
.logo-show img{width:100%;display:block}
.logo-copy p{margin:0 0 18px;color:#4c4c4c}
.cta{background:var(--ink);color:#fff;padding:72px 24px}
.cta-inner{max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px}
.cta h2{margin:0;font-size:clamp(28px,4vw,46px);line-height:1.25}
.cta p{margin:10px 0 0;color:#ccc}
.footer{border-top:1px solid #292929;background:var(--ink);color:#aaa;padding:28px 24px}
.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:20px;font-size:13px}
.mobile-menu{display:none}
@media(max-width:820px){
  .nav-main{display:none}
  .mobile-menu{display:block;border:1px solid var(--line);background:#fff;padding:8px 12px}
  .header-inner{padding:10px 18px}
  .brand img{width:150px}
  .hero-inner{padding:70px 20px}
  .section{padding:68px 20px}
  .grid,.logo-concept{grid-template-columns:1fr}
  .values{grid-template-columns:repeat(2,1fr)}
  .cta-inner,.footer-inner{flex-direction:column;align-items:flex-start}
}
@media(max-width:480px){
  .values{grid-template-columns:1fr}
  .hero{min-height:500px}
}

.notice{padding:16px 20px;margin:26px 0;border-left:4px solid var(--ysd-blue);background:#f5f8fc}
.notice.error{border-left-color:#b3261e}
.contact-grid{display:grid;grid-template-columns:330px 1fr;gap:60px;margin-top:42px}
.contact-info{display:flex;flex-direction:column;gap:24px}.contact-item{border-bottom:1px solid var(--line);padding-bottom:18px}
.contact-item span{display:block;font-size:12px;letter-spacing:.08em;color:#777;margin-bottom:5px}
.contact-item strong{display:block;font-size:15px;line-height:1.65}.contact-item a{color:var(--ysd-blue)}
.contact-form{background:var(--soft);padding:32px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contact-form label{display:block;font-size:14px;font-weight:600;margin-bottom:18px}.contact-form em{color:var(--ysd-blue);font-style:normal}
.contact-form input,.contact-form textarea{display:block;width:100%;margin-top:7px;border:1px solid #d8d8d8;background:#fff;padding:12px 13px;font:inherit;outline:none}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--ysd-blue)}
.submit-btn{border:0;background:var(--ysd-blue);color:#fff;padding:12px 26px;font:inherit;font-weight:700;cursor:pointer}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr;gap:36px}}
@media(max-width:480px){.form-row{grid-template-columns:1fr}}

.products-section{border-top:1px solid var(--line)}
.product-gateway{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
.product-gateway-card{display:flex;flex-direction:column;min-height:285px;padding:30px;background:#fff;border:1px solid var(--line);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}
.product-gateway-card:hover{transform:translateY(-3px);border-color:var(--ysd-blue);box-shadow:0 10px 28px rgba(0,0,0,.06)}
.gateway-number{font-size:12px;letter-spacing:.12em;color:var(--ysd-blue);font-weight:700}
.product-gateway-card h3{font-size:25px;margin:30px 0 10px}
.product-gateway-card p{margin:0;color:#555;line-height:1.75}
.gateway-link{margin-top:auto;padding-top:26px;color:var(--ysd-blue);font-weight:700}
@media(max-width:820px){.product-gateway{grid-template-columns:1fr}}
.product-gallery,.brand-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:44px}.product-gallery figure,.brand-grid figure{margin:0;border:1px solid var(--line);background:#fff;padding:18px}.product-gallery img{display:block;width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff}.brand-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}.brand-grid figure{display:flex;flex-direction:column;justify-content:space-between;min-height:190px}.brand-grid img{display:block;width:100%;height:145px;object-fit:contain}.product-gallery figcaption,.brand-grid figcaption{padding-top:12px;text-align:center;font-weight:600;color:#444}.brand-note{margin-top:26px;padding:20px;background:var(--soft);display:flex;gap:8px;flex-wrap:wrap}.brand-note strong{color:var(--ysd-blue)}
@media(max-width:820px){.product-gallery,.brand-grid{grid-template-columns:1fr 1fr}.brand-grid{grid-template-columns:1fr 1fr}}@media(max-width:520px){.product-gallery,.brand-grid{grid-template-columns:1fr}.brand-grid img{height:160px}}

/* About section image layout */
.about-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,1fr);gap:58px;align-items:start;margin-top:38px}
.about-copy{padding-top:2px}
.about-images{display:flex;flex-direction:column;gap:18px}
.about-logo-row{display:grid;grid-template-columns:150px 1fr;gap:14px;align-items:center}
.about-image-card{background:#fff;border:1px solid var(--line);overflow:hidden}
.about-mark-card{display:flex;align-items:center;justify-content:center;padding:12px;aspect-ratio:1/1}
.about-mark-card img{width:100%;height:100%;object-fit:contain}
.about-wordmark-card{display:flex;align-items:center;justify-content:center;padding:18px 14px;min-height:96px}
.about-wordmark-card img{display:block;width:100%;height:auto;object-fit:contain}
.about-company-card{padding:0}
.about-company-card img{display:block;width:100%;height:auto}
@media(max-width:900px){
  .about-layout{grid-template-columns:1fr;gap:34px}
  .about-images{max-width:760px}
}
@media(max-width:520px){
  .about-logo-row{grid-template-columns:105px 1fr;gap:10px}
  .about-wordmark-card{padding:12px 8px;min-height:70px}
}