/* ============================================================
   深圳市英利标准检测技术有限公司 · 共享基础样式
   两个版面（PTCRB / GCF）共用此文件，通过 CSS 变量做主题化
   ============================================================ */

:root{
  /* 主题变量（各页面在 body 上覆盖） */
  --accent:#8DC63F;
  --accent-dark:#72A230;
  --green:#8DC63F;
  --green-dark:#72A230;
  --deep:#0C0C0C;
  --deep2:#171816;
  --tint:#F4F6F8;
  --gray:#EDEDED;
  --gray-dark:#59595B;
  --sub:#333637;
  --text:#42526c;
  --maxw:1470px;
  --curtain:#0C0C0C;
  --curtain-2:#171816;
  --shadow:0 14px 40px rgba(0,0,0,.10);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Roboto',"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--deep);background:#fff;line-height:1.777778;font-size:17px;font-weight:300;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;box-sizing:border-box}

/* 语言切换：默认中文 */
body.lang-zh .en{display:none}
body.lang-en .zh{display:none}
body.lang-en{--text:#4a5568}

/* ============================================================
   直角箭头按钮（PTCRB arrow-button 风格）
   ============================================================ */
.btn-arrow{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#fff;
  font-family:inherit;font-weight:700;font-size:14px;letter-spacing:.48px;text-transform:uppercase;
  padding:20px 30px;border:0;cursor:pointer;transition:.25s;line-height:1;position:relative;overflow:hidden}
.btn-arrow .arr{display:inline-flex;transition:.25s}
.btn-arrow:hover{background:var(--accent-dark)}
.btn-arrow:hover .arr{transform:translateX(4px)}
.btn-arrow.shade{background:var(--deep2)}
.btn-arrow.shade:hover{background:#000}
.btn-arrow.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-arrow.ghost:hover{background:#fff;color:var(--deep);border-color:#fff}

/* ============================================================
   顶部细导航 nav--utility
   ============================================================ */
.nav-utility{background:#f2f2f2;position:relative;z-index:60}
.nav-utility__in{display:flex;justify-content:space-between;align-items:center;height:44px;font-size:13px;color:#292929;font-weight:500}
.util-right{display:flex;gap:22px;align-items:center}
.util-right a,.util-right button{color:#292929;font-weight:500;font-size:13px;cursor:pointer;background:none;border:0;
  font-family:inherit;display:inline-flex;align-items:center;gap:6px;transition:.2s}
.util-right a:hover,.util-right button:hover{color:var(--accent)}
.util-brand{display:inline-flex;align-items:center;gap:8px;font-weight:600}

/* ============================================================
   主导航 nav--primary
   ============================================================ */
.nav-primary{background:#fff;border-bottom:1px solid var(--gray);position:sticky;top:0;z-index:50}
.nav-primary__in{display:flex;align-items:center;justify-content:space-between;height:84px}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;font-size:18px;color:var(--deep)}
.logo-mark{width:85px;height:40px;background:var(--deep2);color:var(--accent);display:flex;align-items:center;
  justify-content:center;font-weight:700;transition:.25s}
.logo:hover .logo-mark{background:var(--accent);color:#fff}
.nav-menu{display:flex;align-items:center;justify-content:flex-end;gap:28px}
.menu-item{position:relative}
.menu-item>a{font-weight:700;font-size:15px;color:var(--deep);display:flex;align-items:center;gap:6px;padding:6px 0;transition:.25s}
.menu-item>a:hover{color:var(--accent)}
.menu-item>a[aria-current="page"]{color:var(--accent)}
.caret{font-size:10px;color:var(--accent);transition:.25s}
.menu-item.has-sub:hover .caret{transform:rotate(180deg)}
.submenu{position:absolute;top:100%;left:0;background:#fff;min-width:230px;box-shadow:0 10px 24px rgba(0,0,0,.12);
  padding:8px 0;display:none;z-index:60;border-top:3px solid var(--accent)}
.menu-item.has-sub:hover .submenu{display:block}
.submenu a{display:block;padding:11px 20px;font-size:14px;font-weight:600;color:var(--deep);transition:.2s}
.submenu a:hover{color:var(--accent);background:#f2f2f2}
.menu-toggle{display:none;background:none;border:0;font-size:26px;color:var(--deep);cursor:pointer}

/* ============================================================
   通用区块
   ============================================================ */
.section{padding:75px 0}
.section-heading{max-width:var(--maxw);margin:0 auto 60px;padding:0 20px;text-align:center;box-sizing:border-box}
.section-heading h2{font-size:clamp(28px,3.4vw,50px);font-weight:700;line-height:1.2;color:var(--deep);margin-bottom:16px}
.section-heading p{max-width:760px;margin:0 auto;color:var(--text);font-size:17px}
.section-heading .eyebrow{display:block;font-size:13px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;
  color:var(--accent);margin-bottom:12px}

/* 卡片 */
.card-grid{max-width:1430px;margin:0 auto;padding:0 20px;display:flex;flex-direction:column;align-items:center;gap:26px;box-sizing:border-box}
@media(min-width:768px){.card-grid{flex-direction:row;flex-wrap:wrap;justify-content:center;align-items:stretch;gap:0}
  .card-grid .ctia-card{flex:0 1 calc(50% - 23px);margin-bottom:3%}
  .card-grid .ctia-card:nth-child(odd){margin-right:3%}}
.card-grid-3{max-width:1430px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1fr;gap:26px;box-sizing:border-box}
@media(min-width:768px){.card-grid-3{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1200px){.card-grid-3{grid-template-columns:repeat(3,1fr)}}
.ctia-card{max-width:560px;width:100%;background:#fff;border:1.5px solid var(--accent);padding:50px 5.6%;
  box-sizing:border-box;position:relative;text-align:center;color:var(--deep);transition:all .25s ease;
  display:flex;flex-direction:column;align-items:center}
.ctia-card::before{content:'';display:block;border-top:7px solid var(--accent);position:absolute;top:-1px;left:-1px;width:calc(100% + 2px)}
.ctia-card:hover,.ctia-card:focus-within{box-shadow:var(--shadow);transform:translateY(-4px)}
.ctia-card .eyebrow{font-size:13px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.ctia-card h2{font-size:2.1875rem;font-weight:700;line-height:1.18;color:var(--deep);margin-bottom:16px}
.ctia-card p{font-size:16px;color:var(--text);margin-bottom:26px}
.ctia-card .btn-arrow{margin-top:auto}
.card-grid-3 .ctia-card{max-width:none;padding:42px 30px}
.card-grid-3 .ctia-card h2{font-size:1.5rem}
.card-grid-3 .ctia-card p{margin-bottom:0;font-size:15px}
.ctia-card .ic{width:52px;height:52px;background:var(--deep2);color:var(--accent);display:flex;align-items:center;
  justify-content:center;margin:0 auto 16px;flex:none;transition:.25s}
.ctia-card:hover .ic{background:var(--accent);color:#fff}

/* 数据网格 */
.data-grid{background:var(--deep);color:#fff}
.data-grid__contain{max-width:var(--maxw);margin:0 auto;padding:0 20px;box-sizing:border-box}
@media(min-width:768px){.data-grid__contain{display:flex;justify-content:center;flex-wrap:wrap;border:2px solid var(--deep2);border-width:0 2px}}
.data-card{flex:1 1 33%;text-align:center;padding:44px 20px;box-sizing:border-box}
@media(min-width:768px){.data-card+.data-card{border-left:2px solid var(--deep2)}}
.data-card .num{font-size:clamp(40px,5.4vw,72px);font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--accent)}
.data-card .label{margin-top:12px;font-size:15px;font-weight:500;opacity:.9}

/* 图文特性块 */
.feature{max-width:1205px;margin:0 auto;padding:75px 20px 42px;box-sizing:border-box;
  display:flex;flex-direction:column;gap:40px}
@media(min-width:768px){.feature{flex-direction:row;justify-content:space-between;align-items:center;gap:0}
  .feature-text,.feature-images{flex:0 1 48%}}
.feature-text__subtitle{font-size:1.125rem;color:var(--sub);letter-spacing:.8px;font-weight:700;margin:0 0 6px}
.feature-text__title{font-size:clamp(26px,3.2vw,40px);color:var(--deep);font-weight:700;line-height:1.2;margin-bottom:16px}
.feature-text p{font-size:16px;color:var(--text);letter-spacing:0;line-height:1.5;margin-bottom:18px}
.img-slot{width:100%;aspect-ratio:4/3;border:2px dashed #c9d4dc;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:8px;background:#f7f9fa;color:#8a9aa6;text-align:center;padding:20px;box-sizing:border-box}
.img-slot .ph-ic{font-size:38px}
.img-slot .ph-t{font-weight:700;font-size:15px;color:var(--deep)}
.img-slot .ph-s{font-size:12.5px}

/* FAQ 手风琴 */
.acc{border:1px solid var(--gray);background:#fff;margin-bottom:10px;transition:.25s}
.acc:hover{border-color:var(--accent)}
.acc summary{list-style:none;cursor:pointer;padding:14px 18px;font-weight:700;color:var(--deep);
  display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:16px}
.acc summary::-webkit-details-marker{display:none}
.acc summary .plus{color:var(--accent);font-weight:700;font-size:22px;line-height:1;transition:.2s}
.acc[open] summary .plus{transform:rotate(45deg)}
.acc[open] summary{border-bottom:1px solid var(--gray)}
.acc .acc-body{padding:14px 18px;color:var(--text);font-size:15px}

/* 流程步骤 */
.steps{max-width:1430px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1fr;gap:28px;counter-reset:step;box-sizing:border-box}
@media(min-width:768px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{background:#fff;border:1.5px solid var(--accent);padding:34px 24px 26px;text-align:center;position:relative;counter-increment:step;transition:.25s}
.step:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.step::before{content:counter(step);position:absolute;top:-24px;left:50%;transform:translateX(-50%);width:48px;height:48px;
  background:var(--deep2);color:var(--accent);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:22px;transition:.25s}
.step:hover::before{background:var(--accent);color:#fff}
.step h3{margin-top:10px;font-size:19px;font-weight:700;color:var(--deep);margin-bottom:8px}
.step p{color:var(--text);font-size:15px}

/* 深色 CTA */
.cta{background:var(--deep2);color:#fff;text-align:center;padding:92px 20px;position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;left:50%;top:-60%;width:900px;height:900px;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(141,198,63,.12) 0%,transparent 62%);pointer-events:none}
.cta__contain{max-width:815px;margin:auto;position:relative;z-index:2}
.cta h2{font-size:clamp(26px,3.2vw,38px);font-weight:700;line-height:1.1875;margin-bottom:16px;color:#fff}
.cta p{font-size:17px;line-height:1.5;opacity:.85;margin-bottom:30px;color:#fff}

/* Contact —— 横向信息栏（已移除在线留言表单） */
.contact-wrap{max-width:1430px;margin:0 auto;padding:0 20px;box-sizing:border-box;
  display:grid;grid-template-columns:1fr;gap:26px}
@media(min-width:1024px){.contact-wrap{grid-template-columns:minmax(330px,.78fr) 1.7fr;gap:0;align-items:stretch}}
.contact-lead{background:var(--deep2);color:#fff;padding:44px 36px;display:flex;flex-direction:column;justify-content:center}
.contact-pill{display:inline-block;background:var(--accent);color:var(--deep);padding:8px 18px;font-weight:700;font-size:14px;margin-bottom:20px;align-self:flex-start}
.contact-lead h3{font-size:26px;font-weight:700;color:#fff;margin-bottom:14px;line-height:1.3}
.contact-lead p{font-size:15px;line-height:1.7;color:rgba(255,255,255,.78);margin-bottom:26px}
.contact-lead .btn-arrow{align-self:flex-start}
.contact-items{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:620px){.contact-items{grid-template-columns:repeat(2,1fr)}}
.contact-item{background:#fff;border:1.5px solid var(--accent);padding:32px 28px;display:flex;gap:16px;align-items:flex-start;transition:box-shadow .3s,transform .3s}
.contact-item:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
@media(min-width:1024px){
  .contact-items{background:#fff;border:1.5px solid var(--accent);border-left:none;gap:0;padding:0;position:relative}
  .contact-items::before{content:'';position:absolute;top:-1px;left:0;width:100%;height:7px;background:var(--accent)}
  .contact-item{border:0}
  .contact-item:nth-child(2n+1){border-right:1px solid var(--gray)}
  .contact-item:nth-child(n+3){border-top:1px solid var(--gray)}
  .contact-item:hover{transform:none;box-shadow:none;background:#FAFBFC}
}
.contact-item .ic{width:46px;height:46px;background:var(--gray);color:var(--deep2);display:flex;align-items:center;justify-content:center;flex:none}
.contact-item .t{font-weight:700;color:var(--deep);font-size:14px;margin-bottom:6px}
.contact-item .v{color:var(--text);font-size:15px;line-height:1.65}
.contact-item .v a{color:var(--text);text-decoration:none;border-bottom:1px solid var(--gray)}
.contact-item .v a:hover{color:var(--deep);border-bottom-color:var(--accent)}

/* Footer */
footer{background:var(--deep2);color:#fff;padding:60px 20px 30px}
.footer__wrap{max-width:1165px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start}
.footer__logo{flex:0 1 225px;margin-right:30px;margin-bottom:20px;font-weight:700;font-size:19px;color:#fff}
.footer__paragraph{flex:0 1 460px;max-width:100%;margin:0 0 20px;font-size:15px;opacity:.9;color:#fff}
.footer__menus{display:flex;gap:44px;flex-wrap:wrap}
.footer__menus h4{color:var(--accent);font-size:13px;text-transform:uppercase;letter-spacing:.8px;margin-bottom:12px;font-weight:700}
.footer__menus a{display:block;color:#fff;font-size:15px;margin-bottom:8px;opacity:.9;transition:.2s}
.footer__menus a:hover{color:var(--accent);opacity:1}
.footer__copyright{max-width:1165px;margin:45px auto 0;padding-top:22px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;opacity:.8}
.footer__copyright .beian{color:var(--accent);font-weight:700}

/* ============================================================
   右侧版面切换按钮（PTCRB ⇄ GCF）
   ============================================================ */
.switcher{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:200;
  display:flex;flex-direction:column;align-items:stretch}
.switcher__item,.switcher__home{display:flex;align-items:center;justify-content:center;gap:10px;
  background:var(--deep2);color:#fff;text-decoration:none;border-left:3px solid transparent;
  padding:16px 15px;writing-mode:vertical-rl;text-orientation:mixed;font-weight:700;font-size:13.5px;
  letter-spacing:2px;transition:.28s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
.switcher__item::before,.switcher__home::before{content:'';position:absolute;inset:0;background:var(--sc,var(--accent));
  transform:scaleX(0);transform-origin:right;transition:transform .28s cubic-bezier(.4,0,.2,1);z-index:0}
.switcher__item:hover::before,.switcher__home:hover::before{transform:scaleX(1)}
.switcher__item:hover,.switcher__home:hover{color:#fff}
.switcher__item>span,.switcher__home>span{position:relative;z-index:1}
.switcher__item.is-active{background:var(--sc,var(--accent));color:#fff;border-left-color:rgba(255,255,255,.85)}
.switcher__item.is-active::before{transform:scaleX(0)}
.switcher__home{background:#0C0C0C;color:rgba(255,255,255,.75);border-bottom:1px solid rgba(255,255,255,.12)}
.switcher__dot{width:9px;height:9px;background:var(--sc,#fff);border-radius:50%;display:block;position:relative;z-index:1;flex:none}
.switcher__item.is-active .switcher__dot{background:#fff}
.switcher__ico{font-size:16px;line-height:1}

@media(max-width:1200px){
  .switcher__item,.switcher__home{padding:13px 11px;font-size:12px;letter-spacing:1px}
}

/* ============================================================
   页面过渡动效：幕布（进入上拉收起 / 离开下压覆盖）
   —— 采用确定性幕布方案，避免跨文档 View Transition 快照定格问题
   ============================================================ */
.curtain{position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:0;
  background:linear-gradient(135deg,var(--curtain) 0%,var(--curtain-2) 62%,var(--accent) 210%)}
body.is-entering .curtain{animation:curtainOut .62s cubic-bezier(.76,0,.24,1) both}
body.is-leaving .curtain{animation:curtainIn .46s cubic-bezier(.76,0,.24,1) both;opacity:1}
@keyframes curtainOut{0%{transform:scaleY(1);transform-origin:top;opacity:1}
  60%{opacity:1}
  100%{transform:scaleY(0);transform-origin:top;opacity:0}}
@keyframes curtainIn{0%{transform:scaleY(0);transform-origin:bottom;opacity:1}
  100%{transform:scaleY(1);transform-origin:bottom;opacity:1}}

/* 入场逐项浮现 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .curtain{display:none}
  ::view-transition-old(root),::view-transition-new(root){animation:none}
}

/* 滚动入场（IntersectionObserver 添加 .in） */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .75s cubic-bezier(.16,1,.3,1),transform .75s cubic-bezier(.16,1,.3,1)}
[data-reveal].in{opacity:1;transform:none}

@media(max-width:1024px){
  .nav-menu{display:none;position:absolute;top:84px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    padding:10px 20px 20px;gap:0;border-bottom:1px solid var(--gray);box-shadow:0 12px 20px rgba(0,0,0,.08)}
  .nav-menu.open{display:flex}
  .menu-item{border-top:1.5px solid var(--gray)}
  .menu-item:first-child{border-top:0}
  .menu-item>a{padding:14px 0;justify-content:space-between}
  .submenu{position:static;box-shadow:none;border-top:0;display:block;padding:0 0 8px 14px}
  .menu-toggle{display:block}
  .section{padding:55px 0}
  .switcher{top:auto;bottom:16px;right:16px;transform:none;flex-direction:row;border-radius:40px;overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,.28)}
  .switcher__item,.switcher__home{writing-mode:horizontal-tb;padding:12px 15px;letter-spacing:.5px;font-size:12.5px;
    border-left:0;border-right:1px solid rgba(255,255,255,.14)}
  .switcher__home{border-right:0}
  .switcher__item::before,.switcher__home::before{transform:scaleY(0);transform-origin:bottom}
  .switcher__item:hover::before,.switcher__home:hover::before{transform:scaleY(1)}
  .switcher__dot{width:8px;height:8px}
}