/* ============================================================
   龙铭特种作业 · 企业招投标证书 zhaotoubiao.css
   签名 S04：105° 渐变分割，上下对半，内容偏左，
            装饰 = 描边斜向网格线
   ============================================================ */

/* ---------- 首屏 Hero S04 ---------- */
.hero{position:relative;min-height:96vh;display:flex;align-items:center;overflow:hidden;background:var(--ink)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.42;transform:scale(1.05)}
.hero-fade{
  position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(11,11,12,.94) 0%,rgba(11,11,12,.8) 45%,rgba(11,11,12,.35) 78%,rgba(11,11,12,.55) 100%);
}
/* 描边斜向网格线装饰 */
.hero-gridline{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    repeating-linear-gradient(60deg,transparent 0 46px,rgba(255,255,255,.05) 46px 47px),
    repeating-linear-gradient(-30deg,transparent 0 46px,rgba(255,255,255,.05) 46px 47px);
  mask-image:linear-gradient(105deg,#000 40%,transparent 80%);
}
.hero-inner{position:relative;z-index:2;width:min(1200px,92%);margin-inline:auto;padding:150px 0 90px;display:flex;flex-direction:column;align-items:flex-start;text-align:left}
.hero-inner .crumbs{margin-bottom:20px}
.hero-flag{margin-bottom:22px}
.hero-title{font-size:clamp(34px,5.4vw,64px);line-height:1.16;font-weight:900;margin-bottom:20px}
.hero-title .hl{color:#fff;position:relative;white-space:nowrap}
.hero-title .hl::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:14px;z-index:-1;background:linear-gradient(105deg,rgba(255,255,255,.18),transparent);transform:skewX(-8deg)}
.hero-lead{max-width:560px;font-size:16.5px;color:var(--muted-dark);margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:0}

/* ---------- 为啥查证 ---------- */
.why-sec{background:var(--ink)}
.why-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.why-txt p{font-size:15.5px;color:var(--muted-dark);line-height:1.9;margin-top:16px}
.why-img{width:100%;height:420px;object-fit:cover;border-radius:14px}

/* ---------- 证书清单表 ---------- */
.section-alt{background:var(--ink-2)}
.cert-table{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.cert-row{display:grid;grid-template-columns:1fr 1.2fr .9fr .9fr;padding:16px 22px;border-top:1px solid var(--line);font-size:14.5px;align-items:center;gap:10px}
.cert-row:first-child{border-top:0}
.cert-head{background:var(--ink-3);font-weight:800;font-size:13px;letter-spacing:.06em}
.cert-row:not(.cert-head) a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}
.cert-tip{margin-top:20px;font-size:14px;color:var(--muted-dark)}
.cert-tip a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}

/* ---------- 三个场景 ---------- */
.scene-sec{background:var(--ink)}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--ink-2);transition:.4s var(--ease)}
.scene-card:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.3)}
.scene-card img{width:100%;height:210px;object-fit:cover}
.sc-body{padding:22px 24px 26px}
.sc-body h3{font-size:18px;font-weight:800;margin-bottom:8px}
.sc-body p{font-size:14px;color:var(--muted-dark);line-height:1.8}

/* ---------- 有效期时间轴（浅底） ---------- */
.section-light{background:var(--paper);color:var(--txt-on-light)}
.section-light .t-en{color:var(--muted-light)}
.valid-track{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.valid-node{position:relative;padding:30px 28px;border-radius:12px;background:#fff;border:1px solid var(--line-dark)}
.vn-time{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.1em;background:var(--ink);color:#fff;border-radius:4px;padding:5px 12px;margin-bottom:16px}
.valid-node h3{font-size:18px;font-weight:800;margin-bottom:8px}
.valid-node p{font-size:14px;color:var(--muted-light);line-height:1.85}
.valid-node p a{color:#000;font-weight:700;border-bottom:1px solid #000}
.valid-note{margin-top:26px;font-size:14.5px;color:var(--muted-light);text-align:center;max-width:760px;margin-inline:auto}

/* ---------- 查证之前先自查 ---------- */
.check-sec{background:var(--ink)}
.check-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.check-list{list-style:none;display:flex;flex-direction:column;gap:14px;margin-top:24px}
.check-list li{font-size:14.5px;color:var(--muted-dark);line-height:1.8;padding:14px 18px 14px 46px;border:1px solid var(--line);border-radius:10px;background:var(--ink-2);position:relative}
.check-list li::before{content:"";position:absolute;left:18px;top:20px;width:16px;height:9px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg)}
.check-list li b{color:#fff;font-weight:700}
.check-img{width:100%;height:380px;object-fit:cover;border-radius:14px}
.check-out{margin-top:18px;font-size:14.5px;color:var(--muted-dark);border-left:2px solid #fff;padding-left:16px}

/* ---------- FAQ ---------- */
.faq-sec{background:var(--ink-2)}
.faq-list{max-width:860px;margin-inline:auto;display:flex;flex-direction:column;gap:14px}
.faq{border:1px solid var(--line);border-radius:10px;padding:20px 24px;background:var(--ink)}
.faq summary{cursor:pointer;font-size:16px;font-weight:700;list-style:none;position:relative;padding-right:30px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:0;font-size:20px;color:var(--muted-dark)}
.faq[open] summary::after{transform:rotate(45deg)}
.faq p{margin-top:12px;font-size:14.5px;color:var(--muted-dark);line-height:1.85}

/* ---------- CTA ---------- */
.cta-sec{background:var(--ink)}
.cta-strip{background:var(--ink-2);border:1px solid var(--line);border-radius:18px;padding:50px 56px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-strip::before{content:"";position:absolute;right:-40px;bottom:-40px;width:200px;height:20px;background:#fff;opacity:.08}
.cta-strip h2{font-size:clamp(22px,2.8vw,32px);font-weight:900;margin-bottom:8px}
.cta-strip p{color:var(--muted-dark);font-size:14.5px}
.cta-btns{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){.scene-grid{grid-template-columns:1fr 1fr}}
@media (max-width:1024px){
  .why-grid{grid-template-columns:1fr;gap:32px}
  .check-grid{grid-template-columns:1fr;gap:32px}
  .valid-track{grid-template-columns:1fr}
}
@media (max-width:768px){
  .hero{min-height:auto}
  .hero-inner{padding:130px 6% 60px}
  .scene-grid{grid-template-columns:1fr}
  .cert-row{grid-template-columns:1fr;gap:4px}
  .cert-head{display:none}
  .cta-strip{padding:34px 26px}
}
@media (max-width:480px){.why-img,.check-img{height:260px}}