/*
Theme Name: 東熙貿易 長城鋁板
Theme URI: https://dongxial.com/
Author: 東熙貿易
Author URI: https://dongxial.com/
Description: 東熙貿易－長城鋁板材料供應 專屬企業佈景主題。6063鋁合金 / PU・非PU 材料供應，內建 SEO、Schema、FAQ 與完整 RWD。相容 WordPress 6+、PHP8+、Spectra、Rank Math。非套版、無 Elementor 依賴。
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: dongxi-changcheng
*/

/* ============ Design Tokens ============ */
:root{
  --white:#ffffff;
  --black:#0a0a0a;
  --ink:#141414;
  --gray-900:#1c1c1e;
  --gray-700:#3a3a3c;
  --gray-500:#6e6e73;
  --gray-300:#c7c7cc;
  --gray-100:#f2f2f4;
  --gray-50:#f7f7f9;
  --aluminum:#8a9199;
  --aluminum-light:#d8dde2;
  --brand:#0a63d6;
  --brand-dark:#084a9e;
  --line:rgba(0,0,0,.08);
  --shadow-sm:0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 8px 30px rgba(0,0,0,.08);
  --shadow-lg:0 24px 60px rgba(0,0,0,.12);
  --max:1200px;
  --pad:clamp(20px,5vw,64px);
  --r:14px;
  --ease:cubic-bezier(.16,1,.3,1);
  --font:"Noto Sans TC","PingFang TC","Microsoft JhengHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);color:var(--ink);background:var(--white);
  line-height:1.7;letter-spacing:.01em;font-size:17px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
section{scroll-margin-top:72px}

/* ============ Layout ============ */
.wrap{max-width:var(--max);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.eyebrow{font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--brand);font-weight:700;margin-bottom:18px}
.hero-phone{font-size:18px;letter-spacing:normal;text-transform:none;font-weight:600}
.hero-phone a{color:inherit}
h2{font-size:clamp(28px,4.2vw,46px);line-height:1.14;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
h3{font-size:clamp(19px,2.4vw,23px);font-weight:700;letter-spacing:-.01em}
.lead{font-size:clamp(17px,2vw,20px);color:var(--gray-500);max-width:60ch;margin-top:20px;line-height:1.7}
.section{padding:clamp(72px,11vw,140px) 0}
.section--gray{background:var(--gray-50)}
.section--dark{background:var(--black);color:var(--white)}
.section--dark h2{color:#fff}
.section--dark .lead{color:var(--gray-300)}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:19px;letter-spacing:-.01em}
.brand .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--gray-700),var(--black));position:relative;flex:none}
.brand .mark::after{content:"";position:absolute;inset:6px;border-radius:4px;background:linear-gradient(135deg,var(--aluminum-light),var(--aluminum))}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--gray-500);letter-spacing:.04em}
.nav-links{display:flex;gap:34px;font-size:15px;font-weight:500;color:var(--gray-700)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--brand)}
.nav-cta{background:var(--ink);color:#fff;padding:10px 22px;border-radius:100px;font-size:14px;font-weight:600;transition:transform .25s var(--ease),background .25s}
.nav-cta:hover{background:var(--brand);transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;font-size:22px}

/* ============ Buttons ============ */
.btn{display:inline-flex;align-items:center;gap:9px;padding:15px 30px;border-radius:100px;font-weight:600;font-size:16px;transition:transform .25s var(--ease),box-shadow .25s,background .25s;cursor:pointer;border:0}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(10,99,214,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 34px rgba(10,99,214,.36)}
.btn-line{background:#06c755;color:#fff;box-shadow:0 8px 24px rgba(6,199,85,.28)}
.btn-line:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(6,199,85,.36)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--gray-300)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.section--dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.section--dark .btn-ghost:hover{border-color:#fff}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 600px at 78% -10%,rgba(10,99,214,.10),transparent 60%),linear-gradient(180deg,#fbfbfd 0%,#f2f3f5 100%);padding:clamp(80px,13vw,150px) 0 clamp(60px,9vw,110px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:stretch}
.hero h1{font-size:clamp(38px,6.4vw,74px);line-height:1.04;font-weight:850;letter-spacing:-.035em;color:var(--ink)}
.hero h1 .accent{background:linear-gradient(120deg,var(--gray-700),var(--black));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);border-radius:100px;padding:9px 16px;font-size:14px;font-weight:600;color:var(--gray-700);box-shadow:var(--shadow-sm)}
.chip b{color:var(--brand)}
.hero-actions{margin-top:38px;display:flex;flex-wrap:wrap;gap:14px}
.hero-note{margin-top:22px;font-size:13px;color:var(--gray-500)}
.hero-visual{
    border-radius:20px;
    overflow:hidden;
    width:100%;
    height:100%;
    min-height:0;
    aspect-ratio:auto;
}
.hero-image{
    width:100%;
    height:100%;
    display:block;
    object-fit:cover;
}
.hero-visual .slats{position:absolute;inset:0;background:repeating-linear-gradient(100deg,rgba(255,255,255,.55) 0 2px,transparent 2px 34px)}
.hero-visual .glow{position:absolute;inset:0;background:linear-gradient(115deg,rgba(255,255,255,.65),transparent 45%)}
.hero-visual .tag{position:absolute;left:22px;bottom:22px;background:rgba(10,10,10,.78);color:#fff;backdrop-filter:blur(8px);padding:12px 18px;border-radius:12px;font-size:13px;font-weight:600;letter-spacing:.02em}
.product-image{width:100%;aspect-ratio:4 / 3;border-radius:20px;border:1px solid var(--line);object-fit:cover;display:block}
.ph{background:linear-gradient(135deg,#e9edf1,#c9d1d9);position:relative}
.ph::after{content:attr(data-ph);position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#8b95a0;font-size:13px;font-weight:600;letter-spacing:.05em;text-align:center;padding:16px}

/* ============ Clients ============ */
.clients{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.clients .wrap{padding-top:26px;padding-bottom:26px}
.clients p{text-align:center;font-size:13px;color:var(--gray-500);letter-spacing:.04em;margin-bottom:16px}
.clients ul{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:14px 30px}
.clients li{font-size:15px;font-weight:600;color:var(--gray-700);opacity:.72}

/* ============ Grids / cards ============ */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:transparent}
.card .ic{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--gray-100);margin-bottom:18px;color:var(--brand)}
.card .ic svg{width:24px;height:24px}
.card h3{margin-bottom:8px}
.card p{color:var(--gray-500);font-size:15.5px}
.head{max-width:720px;margin-bottom:clamp(40px,6vw,64px)}
.head--center{margin-left:auto;margin-right:auto;text-align:center}

/* ============ Spec table ============ */
.spec{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}
.spec-row{display:grid;grid-template-columns:200px 1fr;border-bottom:1px solid var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row dt{padding:18px 24px;background:var(--gray-50);font-weight:700;font-size:15px;color:var(--ink)}
.spec-row dd{padding:18px 24px;color:var(--gray-700);font-size:15.5px}

/* ============ Compare ============ */
.compare{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:15.5px}
.compare th,.compare td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
.compare thead th{background:var(--ink);color:#fff;font-weight:700;font-size:15px}
.compare thead th.hl{background:var(--brand)}
.compare tbody tr:last-child td{border-bottom:0}
.compare td:first-child{font-weight:700;color:var(--ink);background:var(--gray-50);width:34%}
.compare .yes{color:var(--brand);font-weight:700}
.compare .mut{color:var(--gray-500)}

/* ============ Applications ============ */
.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.app{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:1/1;background:linear-gradient(135deg,#e9edf1,#c4ccd4);border:1px solid var(--line);display:flex;align-items:flex-end}
.app span{position:relative;z-index:2;padding:18px;color:#fff;font-weight:700;font-size:17px;text-shadow:0 1px 8px rgba(0,0,0,.4)}
.app::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(0,0,0,.55));z-index:1}

/* ============ Stats ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{padding:8px 0}
.stat .num{font-size:clamp(34px,5vw,54px);font-weight:850;letter-spacing:-.03em;line-height:1;background:linear-gradient(120deg,#fff,#9aa4ad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{margin-top:12px;color:var(--gray-300);font-size:15px}

/* ============ Cases ============ */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{border-radius:var(--r);overflow:hidden;background:#fff;border:1px solid var(--line);transition:transform .3s var(--ease),box-shadow .3s}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.case .img{aspect-ratio:3/2}
.case .body{padding:20px 22px}
.case .body h3{font-size:18px}
.case .body p{color:var(--gray-500);font-size:14.5px;margin-top:6px}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;background:none;border:0;cursor:pointer;text-align:left;padding:22px 44px 22px 4px;font-size:17.5px;font-weight:650;color:var(--ink);position:relative;font-family:inherit;line-height:1.5}
.faq-q::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:26px;font-weight:400;color:var(--brand);transition:transform .3s var(--ease)}
.faq-item[open] .faq-q::after{content:"–"}
.faq-a{padding:0 44px 24px 4px;color:var(--gray-500);font-size:16px;line-height:1.75}
details.faq-item summary{list-style:none}
details.faq-item summary::-webkit-details-marker{display:none}

/* ============ Contact ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,60px);align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(26px,4vw,40px);box-shadow:var(--shadow-md)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink)}
.field input,.field select,.field textarea{width:100%;padding:14px 16px;border:1px solid var(--gray-300);border-radius:10px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink);transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,99,214,.14)}
.field textarea{resize:vertical;min-height:110px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-info h3{font-size:22px;margin-bottom:8px}
.info-list{list-style:none;margin-top:26px;display:grid;gap:18px}
.info-list li{display:flex;gap:14px;align-items:flex-start}
.info-list .k{width:42px;height:42px;border-radius:11px;background:var(--gray-100);display:flex;align-items:center;justify-content:center;color:var(--brand);flex:none}
.info-list .k svg{width:20px;height:20px}
.info-list b{display:block;font-size:15px;color:var(--ink)}
.info-list span{font-size:14.5px;color:var(--gray-500)}

/* ============ Footer ============ */
.site-footer{background:var(--black);color:var(--gray-300);padding:70px 0 34px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.site-footer .brand{color:#fff}
.site-footer .brand small{color:#D1D5DB}
.site-footer p.desc{margin-top:18px;font-size:14.5px;color:var(--gray-500);max-width:44ch;line-height:1.7}
.foot-col h4{color:#FFFFFF;font-size:14px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px;font-weight:700}
.foot-col ul{list-style:none;display:grid;gap:11px}
.foot-col a{font-size:14.5px;color:#F3F4F6;transition:color .2s}
.foot-col a:hover{color:#0A63D6}
.foot-bottom{padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#BFC5CC}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}*{scroll-behavior:auto!important}}

/* ============ Product specifications ============ */
.product-specifications-section{
    padding:80px 0;
}

.product-specifications-full{
    display:block;
    width:100%;
    max-width:1200px;
    height:auto;
    margin:0 auto;
}

.product-specifications-mobile-split{
    display:none;
}

@media (max-width:768px){

.product-specifications-section{
    padding:40px 0;
}

.product-specifications-image-scroll{
    display:none;
}

.product-specifications-mobile-split{
    display:grid;
    gap:16px;
}

.product-specifications-mobile-split img{
    display:block;
    width:100%;
    height:auto;
}

}
/* ============ Responsive ============ */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;align-items:center}
  .hero-visual{max-width:440px;height:auto;aspect-ratio:4 / 3;margin:8px auto 0}
  .hero-image{height:auto}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .apps{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .cases{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:block}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .cases{grid-template-columns:1fr}
  .spec-row{grid-template-columns:1fr}
  .spec-row dt{background:var(--gray-100)}
  .form-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .compare{font-size:14px}
  .compare th,.compare td{padding:12px 12px}
}
.m-nav{display:none;position:fixed;inset:64px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);padding:14px var(--pad) 22px;z-index:99;flex-direction:column;gap:6px;box-shadow:var(--shadow-md)}
.m-nav.open{display:flex}
.m-nav a{padding:12px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line)}
.m-nav a:last-child{border-bottom:0}

/* ============ Externalized declarations from index.html ============ */
#product .hero-grid{align-items:center}
#product .ph{aspect-ratio:4/3;border-radius:20px;border:1px solid var(--line)}
#compare .head + div{overflow-x:auto}
.compare + p{margin-top:22px;color:var(--gray-500);font-size:14.5px}
.section--dark .eyebrow{color:#5ea0ff}
#faq .head--center .lead{margin-left:auto;margin-right:auto}
.form-card button[type="submit"]{width:100%;justify-content:center}
.form-card button[type="submit"] + p{font-size:12.5px;color:var(--gray-500);margin-top:14px;text-align:center}
.brand .custom-logo{display:block;max-height:52px;width:auto}