/* 泰安齐联装饰材料有限公司 — 材料样本/工业硬朗方向 */
:root{
  --ink:#2b2a26;         /* 炭墨，来自板材深色包边 */
  --paper:#f3efe7;       /* 暖灰米，来自板材原色 */
  --clay:#a3552f;        /* 陶土砖红，来自赤陶与陶砖 */
  --clay-d:#7d3f22;
  --sage:#6d7a5e;        /* 低饱和灰绿，打底 */
  --line:#c9c2b2;
  --fs-hero:clamp(2.4rem,6vw,4.2rem);
  --fs-h2:1.6rem;
  --fs-h3:1.1rem;
  --fs-body:1rem;
  --fs-small:.8125rem;
  --sp:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--paper);color:var(--ink);
  font-size:var(--fs-body);line-height:1.75;
}
.wrap{max-width:1240px;margin:0 auto;padding:0 var(--sp)}
a{color:var(--clay-d);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--clay)}
a:focus,button:focus{outline:2px solid var(--clay);outline-offset:2px}
h1,h2,h3{line-height:1.25;font-weight:800;letter-spacing:.02em}

/* header */
.site-header{border-bottom:3px solid var(--ink);background:var(--paper)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:12px;padding-bottom:12px;flex-wrap:wrap}
.site-header img{display:block}
.site-header nav ul{display:flex;gap:8px;list-style:none;flex-wrap:wrap}
.site-header nav a{
  display:block;padding:6px 10px;font-size:var(--fs-small);
  letter-spacing:.12em;text-decoration:none;color:var(--ink);
  border:1px solid transparent;
}
.site-header nav a:hover{border-color:var(--ink)}
.site-header nav a[aria-current]{background:var(--ink);color:var(--paper)}

/* breadcrumb */
.breadcrumb{font-size:12px;letter-spacing:.12em;color:var(--sage);margin:16px 0;display:flex;gap:8px}
.breadcrumb a{color:var(--sage)}

/* 首页：超大字左文右图错位首屏 */
.hero-split{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center;padding:48px 0}
.kicker{font-size:var(--fs-small);letter-spacing:.3em;color:var(--clay-d);margin-bottom:12px}
.hero-split h1{font-size:var(--fs-hero);letter-spacing:.04em;margin-bottom:16px}
.hero-split .lede{max-width:38em}
.hero-fig{border-left:6px solid var(--clay);border-top:6px solid var(--ink)}
.hero-fig img{display:block;width:100%;height:auto}
.cta-row{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.btn{
  display:inline-block;background:var(--clay);color:#fff;padding:10px 24px;
  font-weight:700;letter-spacing:.1em;text-decoration:none;border:2px solid var(--clay);
}
.btn:hover{background:var(--clay-d);border-color:var(--clay-d);color:#fff}
.btn.ghost{background:transparent;color:var(--clay-d)}
.btn.ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}

/* 能力 */
.caps{padding:48px 0;border-top:3px solid var(--ink)}
.caps>h2{font-size:var(--fs-h2);margin-bottom:24px}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.cap{border-top:2px solid var(--ink);padding-top:16px}
.cap h3{color:var(--clay-d);margin-bottom:8px}

/* 九宫格（契约） */
.items{padding:48px 0}
.items>h2,.items h1{font-size:var(--fs-h2);margin-bottom:24px}
.items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.items>h2,.items>h1{grid-column:1/-1}
.item{border:2px solid var(--ink);background:#fff;padding:0 0 16px}
.item img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;display:block;border-bottom:2px solid var(--ink)}
.item h2,.item h3{font-size:var(--fs-h3);padding:12px 16px 4px}
.item p{padding:0 16px;font-size:var(--fs-small);color:#4a4842}
.item ul{padding:8px 16px 0 34px;font-size:var(--fs-small)}
.item li{margin-bottom:4px}

/* 流程 */
.process{padding:48px 0;border-top:3px solid var(--ink)}
.process h2{font-size:var(--fs-h2);margin-bottom:24px}
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.steps li{position:relative;border-left:4px solid var(--clay);padding-left:16px}
.steps span{font-size:2rem;font-weight:800;color:var(--clay);letter-spacing:.05em}
.steps h3{margin:4px 0}

/* FAQ */
.faq-blk{padding:48px 0}
.faq-blk h2{font-size:var(--fs-h2);margin-bottom:16px;border-bottom:2px solid var(--ink);padding-bottom:8px}
.qa{margin-bottom:24px;max-width:62em}
.qa h3{font-size:var(--fs-h3);margin-bottom:8px}
.more{margin-top:8px}

/* CTA */
.cta{padding:48px 32px;background:var(--ink);color:var(--paper);margin:0 0 48px}
.cta h2{font-size:var(--fs-h2);margin-bottom:12px}
.cta p{max-width:38em;margin-bottom:24px}
.cta .btn{background:var(--clay);border-color:var(--clay);color:#fff}

/* services 色块横幅首屏 */
.band{background:var(--sage);color:#fff;padding:48px 32px;margin:24px 0 32px}
.band h1{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:16px;letter-spacing:.03em}
.band p{max-width:44em}
.band a{color:#fff}

/* about 左图右文首屏 */
.about-hero{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:center;padding:48px 0}
.about-hero h1{font-size:var(--fs-hero);margin-bottom:16px}
.about-hero figure{border-right:6px solid var(--sage);border-bottom:6px solid var(--ink)}
.about-hero img{display:block;width:100%;height:auto}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px 48px;padding:48px 0;border-top:3px solid var(--ink)}
.about-grid h2{font-size:var(--fs-h2);margin-bottom:12px;color:var(--clay-d)}
.about-grid p{max-width:36em}

/* contact 首屏 */
.contact-hero{padding:48px 0}
.contact-hero h1{font-size:var(--fs-hero);margin-bottom:16px}
.contact-hero p{max-width:42em;margin-bottom:24px}
.contact-hero img{display:block;width:100%;height:auto;border-top:6px solid var(--clay)}

/* 文档页 */
.doc article,.doc .faq-hero{max-width:70ch;margin:0 auto;padding:24px 0 48px}
.doc h1{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:16px}
.doc h2{font-size:var(--fs-h2);margin:32px 0 12px;padding-top:16px;border-top:2px solid var(--line)}
.doc .doc-lede{color:#4a4842;margin-bottom:8px}
.doc p{margin-bottom:12px}
table.cmp{width:100%;border-collapse:collapse;margin:16px 0;font-size:var(--fs-small)}
.cmp caption{text-align:left;font-weight:700;padding-bottom:8px}
.cmp th,.cmp td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.cmp thead th{background:var(--ink);color:var(--paper);border-color:var(--ink)}
ul.check{list-style:none;margin:8px 0}
ul.check li{padding-left:28px;position:relative;margin-bottom:8px}
ul.check li::before{content:"✕";position:absolute;left:0;color:var(--clay);font-weight:700}

/* faq hero */
.faq-hero h1{font-size:var(--fs-hero);margin-bottom:16px}
.faq-hero p{max-width:44em}

/* footer */
.site-footer{border-top:3px solid var(--ink);padding:24px 0;margin-top:16px}
.foot-in{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:var(--fs-small)}
.foot-in nav{color:var(--sage)}
.foot-in nav a{color:var(--ink);margin-right:4px}

@media(max-width:900px){
  .hero-split,.about-hero{grid-template-columns:1fr;padding:32px 0}
  .cap-grid,.steps,.about-grid{grid-template-columns:1fr;gap:24px}
  .steps li{border-left-width:3px}
}
@media(max-width:760px){.items{grid-template-columns:minmax(0,1fr)}}