/* ==========================================================================
   青海华彩集团 — Professional Enterprise Template
   基于建筑工程行业标准设计范式
   主色：深蓝 #0F2440 / 辅色：中国红 #C41230 / 点缀：金色 #B8944B
   ========================================================================== */

/* ---- Reset ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:#333;background:#fff;line-height:1.8}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.clearfix::after{content:'';display:table;clear:both}

/* ---- Colors ---- */
:root{
  --blue:#0F2440;
  --blue-light:#1A3D6D;
  --red:#C41230;
  --red-hover:#A00E28;
  --gold:#B8944B;
  --gold-light:#D4B87A;
  --gray:#666;
  --gray-light:#999;
  --border:#E5E5E5;
  --bg:#F5F5F5;
  --white:#fff;
}

/* ---- Buttons ---- */
.btn{display:inline-block;padding:12px 32px;font-size:14px;font-weight:600;border-radius:3px;cursor:pointer;transition:all .3s;text-align:center;letter-spacing:1px}
.btn-primary{background:var(--red);color:#fff;border:none}
.btn-primary:hover{background:var(--red-hover)}
.btn-outline{background:transparent;color:var(--blue);border:1px solid var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-white{background:#fff;color:var(--blue);border:none}
.btn-white:hover{background:#f0f0f0}

/* ---- NAV ---- */
.header{position:fixed;top:0;left:0;right:0;z-index:999;background:#fff;box-shadow:0 1px 10px rgba(0,0,0,.08);transition:all .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 20px;height:70px}
.logo{display:flex;align-items:center;font-size:22px;font-weight:700;color:var(--blue);letter-spacing:2px}
.logo img{height:42px;margin-right:10px}
.nav-list{display:flex;gap:0}
.nav-list li{position:relative}
.nav-list li>a{display:block;padding:0 18px;line-height:70px;font-size:15px;color:#333;transition:all .3s;white-space:nowrap}
.nav-list li>a:hover,.nav-list li.active>a{color:var(--red)}
.nav-list li>a::after{content:'';position:absolute;bottom:0;left:18px;right:18px;height:2px;background:var(--red);transform:scaleX(0);transition:transform .3s}
.nav-list li>a:hover::after,.nav-list li.active>a::after{transform:scaleX(1)}
/* Dropdown */
.nav-list .sub-menu{position:absolute;top:70px;left:0;background:#fff;min-width:150px;box-shadow:0 4px 12px rgba(0,0,0,.1);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;border-radius:0 0 3px 3px}
.nav-list li:hover .sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav-list .sub-menu a{display:block;padding:12px 18px;font-size:14px;color:#666;border-bottom:1px solid #f0f0f0;line-height:1.5}
.nav-list .sub-menu a:hover{background:#fafafa;color:var(--red)}

/* Mobile toggle */
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:5px}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--blue);transition:all .3s}

/* ---- HERO BANNER ---- */
.hero{position:relative;margin-top:70px;overflow:hidden}
.hero-slider{position:relative}
.hero-slide{display:none;position:relative;height:550px}
.hero-slide.active{display:block}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-slide::after{content:'';position:absolute;inset:0;background:rgba(0,0,0,.35)}
.hero-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;z-index:2;width:90%;max-width:800px}
.hero-text h2{font-size:clamp(28px,5vw,48px);font-weight:700;margin-bottom:16px;letter-spacing:2px}
.hero-text p{font-size:clamp(14px,2vw,18px);opacity:.85;margin-bottom:28px}
.hero-text .btn{margin:0 8px}
/* Hero dots */
.hero-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:2}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:all .3s}
.hero-dots span.active{background:#fff;width:32px;border-radius:6px}

/* ---- SECTION ---- */
.section{padding:80px 0}
.section-gray{background:var(--bg)}
.section-blue{background:var(--blue);color:#fff}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:clamp(26px,4vw,36px);font-weight:700;color:var(--blue);margin-bottom:12px;letter-spacing:1px}
.section-title .en{font-size:13px;color:var(--gray-light);text-transform:uppercase;letter-spacing:3px;margin-bottom:8px}
.section-title .line{display:block;width:50px;height:3px;background:var(--red);margin:12px auto 0}
.section-blue .section-title h2{color:#fff}
.section-blue .section-title .en{color:rgba(255,255,255,.5)}
.section-blue .section-title .line{background:var(--gold)}

/* ---- ABOUT ---- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-img{border-radius:3px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.1)}
.about-img img{width:100%;display:block}
.about-text h3{font-size:26px;color:var(--blue);margin-bottom:16px}
.about-text p{color:var(--gray);margin-bottom:16px;line-height:1.9;font-size:15px}
.about-text .about-stats{display:flex;gap:24px;margin-top:24px;flex-wrap:wrap}
.about-stats .stat-item{text-align:center}
.about-stats .stat-item strong{display:block;font-size:32px;color:var(--red);line-height:1}
.about-stats .stat-item span{font-size:13px;color:var(--gray-light)}

/* ---- SERVICE CARDS ---- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{background:#fff;border-radius:3px;padding:36px 24px;text-align:center;transition:all .3s;border:1px solid var(--border);position:relative;overflow:hidden}
.service-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(0,0,0,.1);border-color:transparent}
.service-card .card-icon{width:64px;height:64px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:var(--bg);border-radius:50%;color:var(--red);font-size:28px;transition:all .3s}
.service-card:hover .card-icon{background:var(--red);color:#fff}
.service-card h4{font-size:18px;color:var(--blue);margin-bottom:8px}
.service-card p{font-size:14px;color:var(--gray-light);line-height:1.7}
.service-card .card-link{margin-top:12px;font-size:13px;color:var(--red);font-weight:600;display:none}
.service-card:hover .card-link{display:block}

/* ---- CASE / PROJECTS GRID ---- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:#fff;border-radius:3px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all .3s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.case-card .case-img{position:relative;overflow:hidden;aspect-ratio:16/10;background:#eee}
.case-card .case-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-img img{transform:scale(1.08)}
.case-card .case-img .case-tag{position:absolute;top:12px;left:12px;background:var(--red);color:#fff;font-size:12px;padding:3px 10px;border-radius:2px}
.case-card .case-body{padding:20px}
.case-card .case-body h4{font-size:17px;color:var(--blue);margin-bottom:8px}
.case-card .case-body p{font-size:13px;color:var(--gray-light);line-height:1.6}
.case-card .case-body .case-meta{font-size:12px;color:var(--gray-light);margin-top:8px}

/* ---- STATS BAR ---- */
.stats-row{display:flex;justify-content:center;gap:60px;flex-wrap:wrap}
.stat-box{text-align:center}
.stat-box .stat-num{font-size:clamp(36px,5vw,48px);font-weight:800;color:var(--gold);display:block;line-height:1}
.stat-box .stat-num .unit{font-size:50%;font-weight:400}
.stat-box .stat-label{font-size:14px;color:rgba(255,255,255,.6);margin-top:8px;letter-spacing:1px}

/* ---- NEWS ---- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border-radius:3px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all .3s}
.news-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.news-card .news-img{aspect-ratio:16/10;overflow:hidden;background:#eee}
.news-card .news-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-card:hover .news-img img{transform:scale(1.08)}
.news-card .news-body{padding:20px}
.news-card .news-body h4{font-size:16px;color:var(--blue);margin-bottom:8px;line-height:1.4}
.news-card .news-body p{font-size:13px;color:var(--gray-light);line-height:1.6;margin-bottom:12px}
.news-card .news-body .news-date{font-size:12px;color:var(--gray-light)}

/* ---- CTA ---- */
.cta-box{text-align:center;max-width:700px;margin:0 auto}
.cta-box h2{font-size:clamp(26px,4vw,36px);font-weight:700;margin-bottom:12px}
.cta-box p{color:var(--gray-light);margin-bottom:28px;font-size:15px}
.cta-box .btn{margin:0 8px}

/* ---- FOOTER ---- */
.footer{background:#0C1A2D;color:rgba(255,255,255,.7);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:20px;position:relative;padding-left:16px}
.footer-col h4::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:16px;background:var(--red)}
.footer-col p,.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.55);line-height:2.2;transition:color .3s}
.footer-col a:hover{color:var(--red)}
.footer-bottom{text-align:center;padding:24px 20px;margin-top:40px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:rgba(255,255,255,.3);max-width:1200px;margin-left:auto;margin-right:auto}

/* ---- PAGE HEADER ---- */
.page-banner{background:var(--blue);padding:120px 0 60px;text-align:center;color:#fff}
.page-banner h2{font-size:clamp(26px,4vw,36px);font-weight:700;margin-bottom:8px}
.page-banner .bread{font-size:13px;color:rgba(255,255,255,.5)}
.page-banner .bread a{color:rgba(255,255,255,.7)}
.page-banner .bread a:hover{color:#fff}

/* ---- INNER PAGES ---- */
.inner-section{padding:60px 0}

/* List grid */
.archive-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.archive-card{background:#fff;border-radius:3px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all .3s}
.archive-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,.1)}
.archive-card .arc-img{aspect-ratio:16/10;overflow:hidden;background:#eee}
.archive-card .arc-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.archive-card:hover .arc-img img{transform:scale(1.06)}
.archive-card .arc-body{padding:20px}
.archive-card .arc-body h4{font-size:16px;color:var(--blue);margin-bottom:8px}
.archive-card .arc-body p{font-size:13px;color:var(--gray-light);line-height:1.6}
.archive-card .arc-body .arc-meta{font-size:12px;color:var(--gray-light);margin-top:8px}
.archive-card .arc-body .arc-tag{display:inline-block;background:var(--red);color:#fff;font-size:11px;padding:2px 8px;border-radius:2px;margin-bottom:8px}

/* Article / Detail */
.article-wrap{max-width:860px;margin:0 auto}
.article-wrap h1{font-size:clamp(22px,3vw,30px);color:var(--blue);margin-bottom:16px;line-height:1.4}
.article-wrap .arc-info{display:flex;gap:24px;padding-bottom:20px;border-bottom:1px solid var(--border);margin-bottom:24px;font-size:13px;color:var(--gray-light)}
.article-wrap .arc-content{font-size:15px;line-height:2;color:#444}
.article-wrap .arc-content p{margin-bottom:18px}
.article-wrap .arc-content img{max-width:100%;margin:20px 0;border-radius:3px}
.article-wrap .arc-content h2,.article-wrap .arc-content h3{color:var(--blue);margin:32px 0 16px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info h3{font-size:22px;color:var(--blue);margin-bottom:24px}
.contact-info .ci-item{display:flex;gap:14px;margin-bottom:20px}
.contact-info .ci-item .ci-icon{width:42px;height:42px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;color:var(--red);flex-shrink:0}
.contact-info .ci-item strong{display:block;font-size:15px;color:var(--blue);margin-bottom:2px}
.contact-info .ci-item span,.contact-info .ci-item a{font-size:14px;color:var(--gray);display:block}
.contact-form h3{font-size:22px;color:var(--blue);margin-bottom:24px}
.form-row{margin-bottom:16px}
.form-row input,.form-row textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:3px;font-size:14px;font-family:inherit;transition:border .3s}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--red)}
.form-row textarea{min-height:120px;resize:vertical}

/* Pagination */
.pagination{display:flex;justify-content:center;gap:6px;margin-top:40px}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--border);border-radius:3px;font-size:13px;color:var(--gray);transition:all .3s}
.pagination a:hover,.pagination .active{background:var(--red);color:#fff;border-color:var(--red)}
.pagination .disabled{opacity:.4;pointer-events:none}

/* Empty */
.empty-state{text-align:center;padding:60px 20px;color:var(--gray-light)}
.empty-state p{font-size:15px}

/* ---- RESPONSIVE ---- */
@media(max-width:1024px){
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid,.news-grid,.archive-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .header-inner{height:60px}
  .hero{margin-top:60px}
  .hero-slide{height:360px}
  .hero-text h2{font-size:24px}
  .section{padding:50px 0}
  .section-title{margin-bottom:32px}
  .section-title h2{font-size:22px}
  
  /* Mobile nav */
  .nav-toggle{display:flex}
  .nav-list{display:none;position:fixed;top:60px;left:0;right:0;bottom:0;background:#fff;flex-direction:column;padding:20px;overflow-y:auto;z-index:99}
  .nav-list.open{display:flex}
  .nav-list li>a{line-height:3;font-size:16px;padding:0}
  .nav-list li>a::after{display:none}
  .nav-list .sub-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;padding-left:16px}

  .service-grid{grid-template-columns:1fr}
  .case-grid,.news-grid,.archive-grid{grid-template-columns:1fr}
  .stats-row{gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .page-banner{padding:100px 0 40px}
}

@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .hero-text h2{font-size:20px}
  .hero-text p{font-size:13px}
  .hero-text .btn{padding:10px 20px;font-size:13px;margin:4px}
}