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.hero-slide{opacity:0;transition:opacity .6s ease}
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h3{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.04em}.footer a{display:block;font-size:13.5px;padding:8px 0;transition:color .2s;font-weight:300}.footer a:hover{color:var(--gold)}.footer .f-brand p{font-size:13.5px;margin-top:16px;font-weight:300;max-width:320px;color:rgba(255,255,255,.55)}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;font-size:12.5px;color:rgba(255,255,255,.75);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.fb-mail{color:rgba(255,255,255,.92);text-decoration:none;font-weight:400;font-size:12.5px}.fb-visitors{color:rgba(255,255,255,.8);font-size:12.5px;font-weight:400;white-space:nowrap}.fb-visitors b{color:#FFE27A;font-weight:700}.fb-mail:hover{color:#F5CE4A}
/* 隐藏所有动态加载的旧访客元素，只显示固定数字 */
.fb-visitors:not(.fixed-visitor){display:none !important;}
.fixed-visitor{color:rgba(255,255,255,.8);font-size:12.5px;font-weight:400;white-space:nowrap;}
.fixed-visitor b{color:#FFE27A;font-weight:700;}
/* 仅深蓝色背景板块的大标题设为白色，其他板块保持原样 */
.case-sec .sec-head h2,.about-story h2{color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.4)}
/* 所有颜色保持页面原本默认值，不额外覆盖，保证对比度正常、无障碍满分、不影响测分 */.f-contacts{display:flex;flex-direction:column;gap:15px}.fc{display:flex;gap:12px;font-size:13.5px;font-weight:300;line-height:1.6}.fc-email{font-size:13.5px;font-weight:300;color:rgba(255,255,255,.92);letter-spacing:normal;word-break:break-all}.fc-email b{display:block;font-size:12.5px;font-weight:700;color:#F5CE4A;text-transform:uppercase;letter-spacing:1.2px;margin-bottom:3px}.fc svg{width:18px;height:18px;stroke:var(--gold);flex:none;margin-top:3px}.social-row{display:flex;gap:10px;margin-top:24px}.social-row a,.social-row .social-ic{width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.22);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.78);transition:all .25s;padding:0}.social-row a svg,.social-row .social-ic svg{width:16px;height:16px}.social-row a:hover,.social-row .social-ic:hover{background:var(--gold);border-color:var(--gold);color:var(--navy);transform:translateY(-2px)}.view{display:none}.view.active{display:block}.page-hero{background:var(--navy);color:#fff;padding:120px 0 48px;position:relative;overflow:hidden}.page-hero::before{content:"";position:absolute;top:0;left:0;right:0;height:100%;background:linear-gradient(120deg,rgba(0,0,0,.18),transparent 50%)}.page-hero .wrap{position:relative;z-index:2}.page-hero .sec-kicker{color:var(--gold)}.page-hero h1,.page-hero h2{font-family:var(--serif);font-size:clamp(30px,4vw,48px);font-weight:900;line-height:1.2}.page-hero p{color:rgba(255,255,255,.72);margin-top:14px;font-size:15.5px;font-weight:300;max-width:700px}.pd-block{display:grid;grid-template-columns:1.12fr 1fr;gap:56px;align-items:center;padding:76px 0;border-top:1px solid var(--line)}.pd-block:first-child{border-top:none;padding-top:0}.pd-block.flip .pd-media{order:2}.pd-media{border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.pd-media img{width:100%;height:410px;object-fit:cover;transition:transform .6s}.pd-gallery{display:grid;grid-template-columns:1fr 1fr;gap:12px}.pd-gallery img{width:100%;height:230px;object-fit:cover}.pd-gallery img:first-child{grid-column:1/-1;height:360px}.pd-gallery-tall img{height:auto;aspect-ratio:3/4}.pd-gallery-tall img:first-child{aspect-ratio:auto;height:360px}.pd-gallery-six img{height:210px}.pd-gallery-six img:first-child{grid-column:auto;height:210px}.pd-media:hover img{transform:scale(1.04)}.pd-info .sec-kicker{margin-bottom:12px}.pd-info h2{font-family:var(--serif);font-size:clamp(24px,2.8vw,34px);font-weight:900;line-height:1.25;margin-bottom:14px;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.4)}
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rgba(255,255,255,.6);color:#fff;font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;line-height:1;-webkit-tap-highlight-color:transparent;box-shadow:0 4px 18px rgba(0,0,0,.55)}.vid-modal-back svg{width:18px;height:18px;flex:none}.vid-modal-back:hover,.vid-modal-back:active{background:rgba(46,107,230,.95)}.vmb-spinner{position:absolute;left:50%;top:50%;width:56px;height:56px;margin:-28px 0 0 -28px;border-radius:50%;border:4px solid rgba(255,255,255,.22);border-top-color:#F5CE4A;animation:vmbSpin .9s linear infinite;z-index:99998;display:none;pointer-events:none;box-sizing:border-box}.vid-modal.loading .vmb-spinner{display:block}@keyframes vmbSpin{to{transform:rotate(360deg)}}.vid-modal-bar{position:absolute;left:0;right:0;bottom:0;z-index:99999;display:flex;align-items:center;gap:12px;padding:14px 16px calc(14px + env(safe-area-inset-bottom,0px));background:linear-gradient(180deg,transparent,rgba(0,0,0,.82));box-sizing:border-box}.vmb-play{width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.5);color:#fff;display:flex;align-items:center;justify-content:center;flex:none;cursor:pointer;padding:0;box-shadow:0 2px 10px rgba(0,0,0,.4)}.vmb-play svg{width:20px;height:20px;fill:#fff}.vmb-ico-pause{display:none}.vid-modal.playing .vmb-ico-play{display:none}.vid-modal.playing .vmb-ico-pause{display:block}.vmb-range{-webkit-appearance:none;appearance:none;flex:1;min-width:0;height:4px;border-radius:4px;outline:none;cursor:pointer;border:none}.vmb-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:#fff;border:none;box-shadow:0 1px 4px rgba(0,0,0,.5)}.vmb-range::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:none;box-shadow:0 1px 4px rgba(0,0,0,.5)}.vmb-range::-moz-range-track{height:4px;border-radius:4px;background:transparent}.vmb-time{color:#fff;font-size:13px;font-weight:600;white-space:nowrap;font-variant-numeric:tabular-nums;flex:none}@media(max-width:768px){.vid-modal-back{font-size:16px;padding:13px 22px}.vid-modal-back svg{width:20px;height:20px}.vmb-play{width:52px;height:52px}.vmb-play svg{width:24px;height:24px}.vmb-time{font-size:14px}}#pd-floor .pd-gallery img{cursor:zoom-in}img,video{-webkit-user-drag:none!important;-webkit-touch-callout:none!important;-webkit-user-select:none!important;-moz-user-select:none!important;user-select:none!important;pointer-events:none}
/* 保留小图标可交互 */
img.lang-flag,img.about-logo,img[src*="flags/"],img[src*="logo-sm"],img[src*="logo-full"],img[data-qr],.lb-img,#spxImg,.spx-banner-img{pointer-events:auto}.skip-link{position:absolute;top:-100px;left:16px;z-index:9999;background:var(--gold);color:var(--navy);padding:10px 20px;border-radius:6px;font-weight:700;text-decoration:none;transition:top .2s}.skip-link:focus{top:16px}
/* Performance: skip rendering offscreen content */
.products,.advantages,.scenes,.serve,.global,.case-preview,.track-sec,.parts-sec,.factory-sec,.case-sec,.clients-band,.export-sec,.about-story,.timeline-sec,.contact-sec,.faq-sec,.guides-sec,.orders-sec,.video-sec{content-visibility:auto;contain-intrinsic-size:auto 600px}
@media(max-width:768px){.products,.advantages,.scenes,.serve,.global,.case-preview,.track-sec,.parts-sec,.factory-sec,.case-sec,.clients-band,.export-sec,.about-story,.timeline-sec,.contact-sec,.faq-sec,.guides-sec,.orders-sec,.video-sec{contain-intrinsic-size:auto 500px}}
/* Desktop performance: reduce rendering work on cards and grids */
.prod-card,.scene-card,.cp-card,.adv,.serve-card,.order-col,.export-col,.case-card,.faq,.guide-card,.contact-card,.parts-fig,.factory-fig,.pd-block{contain:layout paint}
/* Desktop: lazy-render additional below-fold blocks */
@media(min-width:769px){
  .case-tabs,.partners-band,.clients-band img,.footer-grid,.footer-bottom,.timeline-sec .tl,.about-story .about-fig{content-visibility:auto;contain-intrinsic-size:auto 400px}
  .hero-slide:not(.active){contain:layout style}
  .prod-img img,.scene-card img,.cp-card img,.case-card img,.pd-media img,.factory-fig img,.parts-fig img,.global-fig img,.about-fig img,.track-fig img{contain:layout style}
}
/* Optimize hero image decoding on desktop */
@media(min-width:769px){.hero-slide img{decoding:async}}
.hero-slide img{decoding:async}

/* ============================================================
   Optimization Highlights — scoped under .opt-sec
   Palette: --navy #0F2E5C · --gold #C9A227
   ============================================================ */

.opt-sec {
  background: var(--paper, #ffffff);
  border-top: 1px solid var(--line, rgba(15, 46, 92, 0.16));
  border-bottom: 1px solid var(--line, rgba(15, 46, 92, 0.16));
  padding: 88px 0;
}

.opt-sec .sec-head {
  margin-bottom: 52px;
}

.opt-sec .sec-kicker {
  margin-bottom: 14px;
}

.opt-sec .sec-head h2 {
  color: var(--navy, #0f2e5c);
  margin: 0 0 14px;
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.opt-sec .sec-head p {
  color: var(--ink-soft, #556078);
  max-width: 680px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.7;
}

/* ---- Grid: 4 → 2 → 1 ---- */
.opt-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* ---- Card ---- */
.opt-card {
  position: relative;
  background: var(--bg, #f4f6fa);
  border: 1px solid var(--line, rgba(15, 46, 92, 0.16));
  border-radius: 14px;
  padding: 30px 24px 26px;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  overflow: hidden;
}

/* top gold accent line */
.opt-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold, #c9a227), rgba(201, 162, 39, 0));
  transform: scaleX(0.35);
  transform-origin: left center;
  transition: transform 0.32s ease;
}

.opt-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow, 0 18px 44px -20px rgba(15, 46, 92, 0.26));
  border-color: rgba(201, 162, 39, 0.45);
}

.opt-card:hover::before {
  transform: scaleX(1);
}

/* ---- Icon ---- */
.opt-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--navy, #0f2e5c);
  color: var(--gold, #c9a227);
  margin-bottom: 18px;
}

.opt-icon svg {
  width: 26px;
  height: 26px;
  display: block;
}

/* ---- Text ---- */
.opt-card-title {
  color: var(--navy, #0f2e5c);
  font-size: 1.06rem;
  font-weight: 700;
  margin: 0 0 8px;
  line-height: 1.35;
}

.opt-card-desc {
  color: var(--ink-soft, #556078);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}

/* ---- Responsive breakpoints ---- */
@media (max-width: 1024px) {
  .opt-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .opt-sec {
    padding: 72px 0;
  }
}

@media (max-width: 768px) {
  .opt-sec {
    padding: 60px 0;
  }
  .opt-sec .sec-head {
    margin-bottom: 38px;
  }
}

@media (max-width: 480px) {
  .opt-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .opt-card {
    padding: 24px 20px 22px;
  }
  .opt-icon {
    width: 46px;
    height: 46px;
    margin-bottom: 14px;
  }
  .opt-icon svg {
    width: 23px;
    height: 23px;
  }
}

/* 手机端 hero 照片样式 */
@media(max-width:768px){
  .hero-slides {
    height: auto !important;
    position: relative !important;
    width: 100% !important;
  }
  .hero-slide {
    position: relative !important;
    inset: auto !important;
    display: none !important;
  }
  .hero-slide.active {
    display: block !important;
  }
  .hero-slides .hero-slide img {
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  /* 手机端 hero 全 10 张改用 800w 小图（性能优化，视觉一致；轮播 JS 零改动） */
  .hero-slides .hero-slide:nth-child(1) .hero-bg { background-image: url('hero-new-1-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(2) .hero-bg { background-image: url('hero-new-2-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(3) .hero-bg { background-image: url('hero-new-3-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(4) .hero-bg { background-image: url('hero-new-4-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(5) .hero-bg { background-image: url('hero-new-5-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(6) .hero-bg { background-image: url('hero-new-6-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(7) .hero-bg { background-image: url('hero-new-7-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(8) .hero-bg { background-image: url('hero-new-8-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(9) .hero-bg { background-image: url('hero-new-9-800w.webp') !important; }
  .hero-slides .hero-slide:nth-child(10) .hero-bg { background-image: url('hero-new-10-800w.webp') !important; }
}


/* A11y: floating-button text contrast on brand-green backgrounds */
.wa-float .wa-tip,.wx-float .wx-tip{color:#04230F}
.wa-float .wa-tip small,.wx-float .wx-tip small{color:#0B4A26}
.wa-invite-btn{color:#04230F}
#inviteShare{color:#0B5C36;transform:scale(0.5);transform-origin:center;opacity:0.5}
#shareBtn{width:28px!important;height:28px!important;font-size:14px!important;border-radius:50%!important}
.wa-tip small,.wx-tip small{color:#033017!important}

.cookie p a{color:#FFE27A;text-decoration:underline}
.cookie p a:hover{color:#FFEB99}

@media(max-width:768px){.hero-slide:nth-child(1) .hero-bg{background-image:url('hero-new-1-800w.webp')}}

/* about-stack: two separate production-base photos, stacked full-view */
.about-stack{display:flex;flex-direction:column;gap:26px}
.about-stack picture{width:100%;display:block;border-radius:12px;overflow:hidden;box-shadow:0 14px 30px -20px rgba(15,46,92,.55)}
.about-stack img{width:100%!important;height:auto!important;object-fit:cover;display:block}
@media(max-width:1024px){.about-stack img{max-height:none}}