/* ============================================================
   华驰公司网站 WAHCHI.COM — 单页样式
   ==================================
   整体完成：2026年10月01日
   最近修改：2026年10月07日 22:53
   设计/制作/维护：董建 79338448@qq.com
   如果您浏览本站并且发现任何问题或意见，诚请联系指出，感谢！
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --accent:#0ce;
  --accent-dark:#0ac;
  --heading:#333;
  --text:#777;
  --muted:#aaa;
  --bg:#fff;
  --bg-alt:#f2f2f2;
  --line:#ccc;
  --font:"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB",Arial,"Microsoft YaHei",sans-serif;
  --container:1140px;
  --gutter:15px;
  --nav-h:108px;
  --sec-pad:70px;
  --t:.25s ease
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
section[id],footer[id]{scroll-margin-top:calc(var(--nav-h) + 20px)}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--accent-dark)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0 0 15px;font-family:var(--font);font-weight:800;color:var(--heading);line-height:1.3}
p{margin:0 0 15px}
p strong{margin:0 2px}
button{font:inherit;border:0;background:none;cursor:pointer}
figure{margin:0}
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}

/* ---------- 3. 区块与标题 ---------- */
.section{padding:var(--sec-pad) 0}
.section-alt{background:var(--bg-alt)}

.section-subtitle{margin:0 0 13px;font-family:var(--font);font-size:14px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--muted);text-align:center}
.section-title{margin:0 0 15px;font-size:40px;font-weight:800;letter-spacing:3.5px;color:var(--heading);text-align:center}
.section-lead{max-width:800px;margin:0 auto 50px;font-size:18px;line-height:1.75;color:var(--text);text-align:center}

.section-inverse{background:#123;color:rgba(255,255,255,.85);background-image:linear-gradient(180deg,#000 0%,#234 86%,#456 88%,#000 100%);padding-bottom:100px}
.section-inverse .section-title{color:#fff;font-weight:700;letter-spacing:2px}
.section-inverse .section-subtitle{color:rgba(255,255,255,.5)}
.section-inverse .section-lead{color:rgba(255,255,255,.75)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-block;padding:12px 26px;border-radius:20px 0;
  font-family:var(--font);font-size:17px;font-weight:600;line-height:1.25;
  text-align:center;text-transform:uppercase;letter-spacing:.5px;
  transition:all var(--t);
  background:var(--accent-dark);
  background-image:linear-gradient(150deg,rgba(0,0,0,.2) 10%,rgba(0,0,0,.6) 90%);
  color:#fff
}
.btn:hover{background:var(--accent);color:#fff}

/* ---------- 5. 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  background:#0ce;
  background:linear-gradient(180deg,#3df 0%,#0ce 18%,#06a 78%,#058 100%);
  border-bottom:2px solid #058;
  transition:box-shadow var(--t);
  overflow:hidden
}
.site-header::before,.top-bg::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(120% 90% at 50% -20%,rgba(255,255,255,.45),transparent 55%),linear-gradient(115deg,rgba(255,255,255,0) 30%,rgba(255,255,255,.22) 45%,rgba(255,255,255,0) 60%);
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.33)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}

.brand{display:inline-flex;align-items:center}
.brand-logo{display:block;height:52px;width:auto;filter:drop-shadow(rgba(0,0,0,.3) 3px 3px 3px);transition:transform .3s,filter .3s}
img.brand-logo:hover{transform:scale(1.08);filter:drop-shadow(rgba(0,0,0,.3) 6px 6px 3px)}

.main-nav ul{display:flex;align-items:center;padding-top:30px}
.main-nav a{display:block;padding:0 13px;font-family:var(--font);font-size:14px;font-weight:600;letter-spacing:1px;text-transform:uppercase;line-height:var(--nav-h);color:rgba(255,255,255,.88)}
.main-nav a:hover,.main-nav a.is-active{color:#fe0}

.nav-toggle{display:none;width:36px;height:30px;position:relative}
.nav-toggle span{position:absolute;left:4px;width:26px;height:2px;background:rgba(255,255,255,.9);transition:all var(--t)}
.nav-toggle span:nth-child(1){top:6px}
.nav-toggle span:nth-child(2){top:14px}
.nav-toggle span:nth-child(3){top:22px}
.nav-toggle.is-open span:nth-child(1){top:14px;transform:rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){top:14px;transform:rotate(-45deg)}

/* ---------- 6. 顶部轮播 ---------- */
.top-stack{position:relative;height:100vh;overflow:hidden}
.top-bg{position:absolute;inset:0;z-index:-2;background:linear-gradient(180deg,#000 0%,#123 50%,#000 50%,#234 100%)}
.top-bg-svg{position:absolute;inset:0;z-index:-1;width:100%;height:100%;object-fit:cover;opacity:.15}
.top-carousel{position:relative;width:100%;height:100%;overflow:hidden}

.top-slide{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  padding:calc(var(--nav-h) + 20px) 0 90px;
  opacity:0;visibility:hidden;
  transition:opacity .7s ease;
}
.top-slide.is-active{opacity:1;visibility:visible}

.top-slide__inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.top-slide__figure{position:relative;margin:0;display:flex;justify-content:center;align-items:center}
.top-slide__media{display:block;width:auto;max-width:min(560px,84vw);height:auto;filter:drop-shadow(0 18px 24px rgba(0,0,0,.5))}

.top-slide__shadow{position:absolute;left:50%;bottom:0;width:100%;height:80px;transform:translateX(-50%);background:radial-gradient(50% 50% at 50% 50%,rgba(0,0,0,.6),transparent 70%)}

.top-slide__text{position:relative;z-index:1}
.top-slide__eyebrow{margin:0 0 12px;font-size:14px;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:rgba(159,220,239,.9)}
.top-slide__title{margin:0 0 22px;font-size:clamp(28px,4.4vw,52px);font-weight:800;letter-spacing:6px;color:#fff;line-height:1.15}
.top-slide__lead{max-width:520px;margin:0 0 32px;font-size:16px;line-height:2;color:rgba(255,255,255,.85)}
.top-slide__actions{display:inline-flex;gap:14px;flex-wrap:wrap}

.top-slide__figure,.top-slide__eyebrow,.top-slide__title,.top-slide__lead,.top-slide__actions{opacity:0;transform:translateX(-200px) scale(.8)}
.top-slide.is-active .top-slide__figure{animation:slide-in .7s cubic-bezier(.34,1.56,.64,1) .1s both}
.top-slide.is-active .top-slide__eyebrow{animation:slide-in .7s ease-out .25s both}
.top-slide.is-active .top-slide__title{animation:slide-in .7s ease-out .35s both}
.top-slide.is-active .top-slide__lead{animation:slide-in .7s ease-out .5s both}
.top-slide.is-active .top-slide__actions{animation:slide-in .7s ease-out .65s both}
@keyframes slide-in{
  from{opacity:0;transform:translateX(-200px) scale(.8)}
  to{opacity:1;transform:none}
}

.top-dots{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:inline-flex;gap:10px;z-index:2}
.top-dot{width:30px;height:10px;padding:0;border:0;cursor:pointer;border-radius:5px;background:rgba(255,255,255,.3);transition:background .3s ease,width .3s ease}
.top-dot:hover{background:rgba(255,255,255,.55)}
.top-dot.is-active{background:var(--accent);width:40px}

@media (prefers-reduced-motion:reduce){
  .top-slide,.top-slide__figure,.top-slide__eyebrow,.top-slide__title,.top-slide__lead,.top-slide__actions,.top-dot{transition:none;animation:none}
  .top-slide__figure,.top-slide__eyebrow,.top-slide__title,.top-slide__lead,.top-slide__actions{opacity:1;transform:none}
}

@media (max-width:640px){
  .top-slide{padding-top:calc(var(--nav-h) + 20px)}
  .top-slide__inner{grid-template-columns:1fr;gap:24px;text-align:center}
  .top-slide__text{text-align:center}
  .top-slide__media{max-width:min(420px,78vw)}
  .top-slide__title{letter-spacing:5px;text-indent:5px;font-size:clamp(24px,7vw,38px)}
  .top-slide__lead{margin-left:auto;margin-right:auto;font-size:14px;white-space:nowrap}
  .top-slide__actions{justify-content:center}
  .top-slide__shadow{bottom:-18px;width:55%;height:18px}
}

/* ---------- 7. 简介 About ---------- */
.about-row{display:flex;gap:40px}
.about-col{flex:1;min-width:0}
.about-figure{margin-bottom:22px;overflow:hidden;background:var(--bg-alt)}
.about-figure img{width:100%;aspect-ratio:2/1;object-fit:cover;transition:transform .5s ease}
.about-col:hover .about-figure img{transform:scale(1.03)}
.about-col h3{margin:0 0 10px;font-size:20px;font-weight:700;letter-spacing:.5px;color:var(--heading)}
.about-col p{margin:0;font-size:14px;line-height:1.8}

/* ---------- 8. 历程 Timeline ---------- */
.timeline{position:relative;display:flex;margin-top:40px}
.timeline::before{content:"";position:absolute;left:0;right:0;top:48px;height:1px;background:var(--accent)}
.tl-item{flex:1;min-width:0;padding:0 10px;text-align:center;position:relative}
.tl-year{display:block;margin-bottom:16px;font-family:var(--font);font-size:16px;font-weight:600;letter-spacing:1px;color:var(--accent)}
.tl-dot{display:block;width:11px;height:11px;border-radius:50%;background:var(--accent);margin:0 auto 20px;box-shadow:0 0 0 4px rgba(3,196,235,.2);position:relative;z-index:1}
.tl-title{margin:0 0 10px;font-size:16px;font-weight:700;letter-spacing:1px;color:var(--heading)}
.tl-desc{margin:0;font-size:13px;line-height:1.65;color:var(--text)}

/* ---------- 9. 产品 ---------- */
.product-row{display:flex;gap:0;margin:0 -15px}
.product-col{flex:1;min-width:0;padding:0 15px;text-align:center}
.product-figure{display:block;overflow:hidden;background:var(--bg-alt);margin:0 0 22px}
.product-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s ease}
.product-col:hover .product-figure img{transform:scale(1.03)}

.product-name{margin:0 0 12px;font-family:var(--font);font-size:22px;font-weight:700;letter-spacing:2px;color:var(--heading)}
.product-divider{display:block;height:1px;margin:0 auto 12px;background:var(--line)}
.product-desc{margin:0 auto;max-width:420px;font-size:15px;line-height:1.8;color:var(--text)}

/* ---------- 10. 车衣 宽屏长图 ---------- */
.cheyi-banner{position:relative;margin:0;overflow:hidden;background:#111}
.cheyi-banner img{width:100%;aspect-ratio:21/9;object-fit:cover}

/* ---------- 11. 缓冲胶 图库 ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.gallery-item{display:block;position:relative;overflow:hidden;background:var(--bg-alt)}
.gallery-item img{width:100%;aspect-ratio:3/2;object-fit:cover;object-position:center top;transition:object-position .5s ease}
.gallery-item:hover img{object-position:bottom}

/* ---------- 12. 资讯 ---------- */
.news-list{margin-top:10px}
.news-item{display:flex;gap:30px;align-items:flex-start;padding:25px 0;border-bottom:1px solid var(--line)}
.news-item:first-child{border-top:1px solid var(--line)}
.news-thumb{flex:0 0 230px;display:block;overflow:hidden;background:var(--heading)}
.news-thumb img{width:100%;aspect-ratio:2/1;object-fit:cover;object-position:center top;transition:opacity .5s ease;opacity:.8}
.news-item:hover .news-thumb img{opacity:1}
.news-content{flex:1;min-width:0}
.news-date{display:block;margin:0 0 6px;font-family:var(--font);font-size:13px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent)}
.news-title{margin:0 0 10px;font-family:var(--font);font-size:22px;font-weight:500;letter-spacing:-.2px;line-height:1.35;color:var(--heading)}
.news-excerpt{margin:0;font-size:15px;line-height:1.75;color:var(--text)}

/* ---------- 13. 联系 ---------- */
.contact-row{display:flex;gap:80px}
.contact-col{flex:1;min-width:0}
.contact-col h3{margin:0;font-size:20px;font-weight:700;text-align:center;letter-spacing:1px;color:var(--heading);padding-bottom:14px;border-bottom:1px solid var(--line)}
.contact-col ul li{display:flex;gap:10px;padding:8px 0;border-bottom:1px solid var(--line);justify-content:center}
.contact-col ul li:last-child{border-bottom:0}
.contact-col em{font-style:normal;font-family:var(--font);font-size:14px;font-weight:600;letter-spacing:1px;color:var(--muted);line-height:1.9}
.contact-col span{color:var(--text);font-size:15px}

/* ---------- 14. 页脚 ---------- */
.site-footer{background:#234;color:rgba(255,255,255,.8);padding-top:60px}
.footer-row{display:flex;padding-bottom:50px}
.footer-col{flex:1;min-width:0}
.footer-col:first-child{flex:.7;border-right:1px solid #abc}

.brand-light{margin:40px auto;display:block;height:80px;width:auto;max-width:80%;opacity:.5;transition:opacity .3s,transform .5s}
img.brand-light:hover{opacity:.9;transform:scale(1.08)}

.footer-heading{margin:0 0 20px;font-family:var(--font);font-size:20px;font-weight:700;letter-spacing:2px;color:#fff}
.footer-list li{display:flex;gap:16px;padding:3px 0}
.footer-list em{font-style:normal;font-family:var(--font);font-size:14px;letter-spacing:1px;color:rgba(255,255,255,.4);line-height:1.9}
.footer-list span,.footer-list a{font-size:14px;color:rgba(255,255,255,.8)}
.footer-list a:hover{color:var(--accent)}

.footer-bar{background:#123;border-top:1px solid rgba(255,255,255,.1);padding:18px 0}
.footer-bar-inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,.4)}
.footer-bar a{color:rgba(255,255,255,.6)}
.footer-bar a:hover{color:var(--accent-dark)}

/* ---------- 15. 进入视窗淡入 ---------- */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.fade-up.is-in{opacity:1;transform:none}

/* ---------- 16. 响应式 ---------- */
@media (max-width:1024px){
  .main-nav a{padding:0 9px;letter-spacing:.5px}
  .timeline{flex-wrap:wrap}
  .tl-item{flex:0 0 33.3333%;margin-bottom:34px}
  .timeline::before{display:none}
  .gallery-item img{aspect-ratio:4/3;transition:transform .5s ease}
  .gallery-item:hover img{transform:scale(1.05)}
}
@media (max-width:900px){
  :root{--nav-h:84px}
  .section{padding:60px 0}
  .section-inverse{padding:80px 0}
  .section-title{font-size:30px;letter-spacing:2.5px}
  .section-lead{font-size:16px;margin-bottom:36px}

  /* 移动端导航 */
  .nav-toggle{display:block}
  .main-nav{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .main-nav.is-open{max-height:520px}
  .main-nav ul{flex-direction:column;align-items:stretch;padding:6px 15px}
  .main-nav a{line-height:48px;padding:0;border-bottom:1px solid var(--line);color:var(--heading)}
  .main-nav a:hover,.main-nav a.is-active{color:var(--accent);text-shadow:none}
  .main-nav li:last-child a{border-bottom:0}
  .brand-logo{height:40px}

  .about-row,.contact-row{flex-direction:column;gap:36px}
  .product-row{flex-direction:column;gap:44px;margin:0}
  .product-col{padding:0}
  .news-item{gap:20px}
  .news-thumb{flex:0 0 160px}
  .news-title{font-size:19px}
  .footer-row{flex-direction:column;gap:36px}
  .footer-col:first-child{border:none}
}
@media (max-width:640px){
  :root{--gutter:18px;--nav-h:72px}
  .section-title{font-size:26px;letter-spacing:2px}
  .brand-logo{height:32px}

  .tl-item{flex:0 0 100%;text-align:left;padding-left:26px;margin-bottom:26px}
  .tl-item::before{content:"";position:absolute;left:5px;top:8px;bottom:-26px;width:1px;background:var(--accent)}
  .tl-dot{position:absolute;left:0;top:8px;margin:0}

  .gallery{grid-template-columns:repeat(2,1fr)}

  .news-item{flex-direction:column;gap:16px}
  .news-thumb{flex:none;width:100%}
  .news-thumb img{aspect-ratio:16/9}

  .btn{font-size:14px;padding:12px 20px}
}

/* ---------- 17. c-bully 区块圆点导航 ---------- */
.c-bully{position:fixed;right:28px;top:50%;transform:translateY(-50%);z-index:600}
.c-bully__bullet{position:relative;width:28px;height:28px;cursor:pointer;outline:none}
.c-bully__bullet--pop::after{
  content:"";position:absolute;top:50%;left:50%;
  width:12px;height:12px;border-radius:50%;
  border:2px solid var(--heading);
  transform:translate(-50%,-50%);
  transition:border-color .2s ease-out;
}
.c-bully__bullet--squash{position:absolute;top:0;left:0;right:0;transition:top .2s ease-out}
.c-bully__bullet--squash::before{
  content:"";position:absolute;top:50%;left:50%;
  width:12px;height:12px;border-radius:50%;
  background:var(--heading);
  transform:translate(-50%,-50%);
}
.c-bully__title{
  position:absolute;top:1px;right:26px;
  font-family:var(--font);font-size:12px;line-height:20px;font-weight:400;
  text-transform:uppercase;white-space:nowrap;
  color:rgba(255,255,255,.8);background:rgba(0,0,0,.7);
  padding:1px 10px;border-radius:2px;
  opacity:0;transform:scale(.6);
  transition:opacity .2s ease-out,transform .2s ease-out;
  pointer-events:none;
}
.c-bully__bullet--pop:hover .c-bully__title,.c-bully__bullet--pop:focus-visible .c-bully__title{opacity:1;transform:scale(1)}
.c-bully--inversed .c-bully__bullet--pop::after{border-color:#fff}
.c-bully--inversed .c-bully__bullet--squash::before{background:#fff}
@media (max-width:900px){
  .c-bully{display:none}
}

/* ---------- 18. 灯箱 Lightbox 点击查看大图---------- */
body:has(.lightbox[open]){overflow:hidden}
.lightbox{
  border:none;padding:0;background:none;color:#fff;
  cursor:zoom-out;
  overflow:visible;
}
.lightbox::backdrop{background:rgba(0,0,0,.82)}
.lightbox[open]{animation:lightbox-in .25s ease-out}
.lightbox__figure{margin:0;cursor:default}
.lightbox__img{
  display:block;width:auto;height:auto;
  max-width:92vw;max-height:82vh;
  box-shadow:0 8px 60px rgba(0,0,0,.55);
}
.lightbox__caption{margin:10px 0 0;text-align:center;font-size:14px;letter-spacing:1px;color:rgba(255,255,255,.75)}
@keyframes lightbox-in{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.lightbox[open]{animation:none}}

/* ---------- 19. 打印样式 ---------- */
@media print{
  .site-header,.top-stack,.c-bully,.btn,.cheyi-banner,.gallery,.lightbox{display:none}
  .section,.section-alt,.section-inverse,.site-footer{background:#fff!important;background-image:none!important}
  .section-inverse .section-title,.footer-heading{color:#000}
  .section-inverse .section-subtitle,.section-inverse .section-lead{color:#555}
  body,h2,h3,h4,.section-title{color:#000}
  .section-lead,.tl-desc,.news-excerpt,.about-col p,.footer-list span{color:#333}
  .about-col,.tl-item,.news-item,.contact-col{break-inside:avoid}
}