/* SINTS phase 1: shared, reversible presentation refinements. */
:root{--muted:#465560;--steel-l:#4e5d68}
html{scroll-padding-top:110px}body{font-size:16px}p{line-height:1.85}a:focus-visible,button:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid #e8552a;outline-offset:4px}
.phase-home-hero{background:#edf1f3;border-bottom:1px solid var(--line);padding:56px 0}.phase-hero-grid{display:grid;grid-template-columns:1.08fr 1fr;gap:48px;align-items:center}.phase-home-hero h1{font-size:clamp(32px,3.6vw,52px);line-height:1.3;letter-spacing:-.035em;margin:20px 0}.phase-hero-lead{font-size:18px;line-height:1.85;color:#465560;max-width:36em}.phase-hero-foot{font-size:14px;color:#5b6872;margin:24px 0 0}.phase-home-hero figure{max-width:560px;width:100%;margin:0;justify-self:end;background:#fff;box-shadow:0 12px 34px #0c1a2414}.phase-home-hero figure img{width:100%;height:auto;display:block;aspect-ratio:6/5;object-fit:contain}.phase-home-hero figcaption{display:flex;justify-content:space-between;gap:12px;padding:15px 20px;font-size:14px}.phase-home-hero figcaption a{color:#a93616;font-weight:700}.phase-home-hero .hero-actions{flex-wrap:wrap;gap:12px;display:flex;margin-top:24px}.phase-home-hero .button.secondary{background:#fff;color:var(--night);border:1px solid #b8c3ca}
.phase-about-hero{margin:30px auto 0;display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:stretch;background:#edf1f3;padding:44px}.phase-about-hero h1{font-size:clamp(30px,3.8vw,48px);line-height:1.35;margin:16px 0}.phase-about-hero p{max-width:40em}.phase-about-hero aside{background:var(--night);color:#fff;padding:30px;display:flex;flex-direction:column;justify-content:center}.phase-about-hero aside p{color:#d0dbe3}.phase-about-hero aside strong{font-size:32px;line-height:1.55;margin:12px 0}.phase-about-hero aside span{color:#d0dbe3;font-size:15px}.phase-origin{display:grid;grid-template-columns:160px 1fr;gap:36px;align-items:start;border-bottom:1px solid var(--line);padding:0 0 34px;margin-bottom:30px}.phase-year{font-size:52px;line-height:1.1;font-weight:700;color:#c44420}.phase-origin h2{margin:0 0 14px}.phase-base-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:26px 0}.phase-base-grid>article{background:#f2f4f5;padding:26px;min-width:0;border-top:2px solid #d6dfe5}.phase-base-grid h2{font-size:25px;margin:0 0 16px}.phase-base-grid h3{font-size:21px;margin:0 0 14px}.phase-area{font-size:24px;color:#b83a19;font-weight:700;margin:12px 0}.phase-about-section{margin:42px 0}.phase-about-section .factory-gallery{margin:24px 0}.phase-about-content p{font-size:17px}.phase-about-content .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.phase-factory-groups>section{margin:0 0 42px}.phase-factory-groups h2{font-size:26px;margin-bottom:20px}.phase-factory-groups .factory-gallery{margin:0}.factory-gallery figure{min-width:0}.factory-gallery img{height:auto;aspect-ratio:6/5;object-fit:contain;background:#e9edef}.factory-gallery figcaption{font-size:15px}
.phase-inquiry label{display:block;font-size:18px;font-weight:700;margin:28px 0 12px}.phase-inquiry textarea{display:block;width:100%;padding:20px;border:1px solid #aab8c2;border-radius:6px;color:#263641;background:#fff;font:16px/1.8 var(--font);resize:vertical;margin-bottom:16px;box-sizing:border-box}.phase-inquiry ul,.phase-input-list{list-style:disc;padding-left:22px;line-height:1.9;color:#465560}.phase-inquiry li{margin:8px 0}.phase-product-context{border-left:3px solid #e8552a;background:#f2f4f5;padding:16px 20px}.phase-inquiry #inquiry-status{font-size:15px}.contact-person dd{overflow-wrap:anywhere}.phase-three-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.phase-three-grid article{background:#f2f4f5;border-top:2px solid #e8552a;padding:24px}.phase-three-grid h3{font-size:21px;margin:8px 0 14px}.phase-product-content>section{max-width:1120px}.phase-product-content p{font-size:17px}.verified-detail h1{font-size:clamp(28px,3.2vw,42px)}.detail-lead{font-size:17px}.detail-facts{font-size:16px}.catalog-secondary a{overflow-wrap:anywhere}.site-footer a,.site-footer p{line-height:1.9}
@media(max-width:1100px){.phase-hero-grid{gap:28px}.phase-about-hero{gap:24px;padding:32px}.phase-home-hero h1{font-size:36px}}
@media(max-width:760px){.phase-home-hero{padding:30px 0}.phase-hero-grid{grid-template-columns:1fr;gap:28px}.phase-home-hero figure{justify-self:center;max-width:520px}.phase-home-hero h1{font-size:34px}.phase-hero-lead{font-size:17px}.phase-about-hero{grid-template-columns:1fr;padding:26px;gap:20px}.phase-about-hero aside strong{font-size:28px}.phase-origin{grid-template-columns:1fr;gap:18px}.phase-base-grid,.phase-three-grid{grid-template-columns:1fr}.phase-base-grid>article{padding:22px}.phase-about-content p,.phase-product-content p{font-size:16px}.phase-inquiry textarea{padding:14px}.phase-hero-grid figure img{max-height:360px}.phase-factory-groups h2{font-size:23px}.detail-jump{top:74px}.factory-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:420px){.phase-home-hero h1{font-size:30px}.phase-home-hero .hero-actions{display:grid;grid-template-columns:1fr}.phase-home-hero figcaption{padding:12px;font-size:13px}.phase-about-hero{padding:22px}.factory-gallery{grid-template-columns:1fr}.phase-three-grid article{padding:20px}.phase-hero-foot{font-size:13px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}

.page-boundary{margin:42px auto;padding:28px 30px;background:#f7f3ed;border-left:4px solid #e8552a;max-width:1120px}.page-boundary h2{margin:6px 0 14px}.page-boundary p{max-width:860px}.page-boundary ul{columns:2;gap:32px;padding-left:22px;line-height:1.8}.page-boundary li{margin:4px 0}@media(max-width:760px){.page-boundary{margin:28px 0;padding:22px 18px}.page-boundary ul{columns:1}}

.editorial-note{margin:22px 0 34px;padding:18px 22px;background:#f7f3ed;border-top:3px solid #e8552a;color:#465560}.editorial-note strong{display:block;color:#263641;margin-bottom:6px}.editorial-note p{margin:0;max-width:900px;line-height:1.8}

/* 2026-09 content deepening */
#part-engineering-notes{border-left:3px solid #e8552a;background:#f7f9fa;padding:26px 28px;margin-top:30px}#part-engineering-notes h2{margin-top:0}#part-engineering-notes h3{margin:24px 0 10px;font-size:18px}#part-engineering-notes ul{padding-left:22px;line-height:1.9;color:#465560}.phase-trade-manufacturing{margin-top:26px;margin-bottom:36px}@media(max-width:760px){#part-engineering-notes{padding:22px 20px}}

/* Stage 2: verified/reference imagery + multi-image hero */
.p2-image{position:relative;overflow:hidden}.p2-reference-badge{position:absolute;left:10px;bottom:10px;padding:5px 8px;border-radius:999px;background:rgba(12,26,36,.82);color:#fff;font-size:11px;line-height:1;letter-spacing:.02em}.reference-photo{position:relative}.reference-photo:after{content:"同类结构参考";position:absolute;right:12px;bottom:12px;padding:6px 9px;border-radius:999px;background:rgba(12,26,36,.82);color:#fff;font-size:12px}.phase-hero-carousel{position:relative;max-width:560px;width:100%;margin:0;justify-self:end;background:#fff;box-shadow:0 12px 34px #0c1a2414;overflow:hidden}.phase-hero-carousel .hero-slides{position:relative;aspect-ratio:6/5;background:#e9edef}.phase-hero-carousel .hero-slide{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .55s ease}.phase-hero-carousel .hero-slide.is-active{opacity:1;pointer-events:auto}.phase-hero-carousel .hero-slide img{width:100%;height:100%;display:block;object-fit:cover}.phase-hero-carousel .hero-slide.product-slide img{object-fit:contain;background:#fff;padding:5%}.phase-hero-carousel figcaption{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;font-size:14px;min-height:52px}.phase-hero-carousel figcaption a{color:#a93616;font-weight:700}.hero-carousel-controls{display:flex;align-items:center;gap:8px}.hero-carousel-controls button{width:28px;height:28px;border:1px solid #c7d0d5;background:#fff;border-radius:50%;cursor:pointer;color:#1a2933;font-size:16px;line-height:1}.hero-carousel-dots{display:flex;gap:6px}.hero-carousel-dots button{width:7px;height:7px;border:0;border-radius:50%;padding:0;background:#aab5bc}.hero-carousel-dots button[aria-current="true"]{background:#a93616}.phase-home-hero .phase-hero-carousel{max-width:560px}
@media(max-width:760px){.phase-hero-carousel{justify-self:center;max-width:520px}.phase-hero-carousel .hero-slides{aspect-ratio:4/3}.phase-hero-carousel figcaption{font-size:13px;padding:12px 14px}.p2-reference-badge{font-size:10px;left:7px;bottom:7px}}

/* Stage 3: landing-page carousel refinements */
.inner-hero>.phase-hero-carousel{width:min(520px,100%);align-self:stretch}.inner-hero>.phase-hero-carousel .hero-slides{min-height:340px}.phase-about-hero>.phase-hero-carousel{max-width:none;width:100%;height:100%;box-shadow:none}.phase-about-hero>.phase-hero-carousel .hero-slides{min-height:320px;height:100%}.p2-hero-carousel{max-width:760px;margin:12px 0 32px;justify-self:start}.p2-hero-carousel .hero-slides{aspect-ratio:16/7}.p2-hero-carousel .product-slide img{padding:3.5%}.editorial-hero>.phase-hero-carousel{margin:0 0 44px;max-width:840px;justify-self:start}.editorial-hero>.phase-hero-carousel .hero-slides{aspect-ratio:16/7}
@media(max-width:760px){.inner-hero>.phase-hero-carousel .hero-slides,.phase-about-hero>.phase-hero-carousel .hero-slides{min-height:0;aspect-ratio:4/3}.p2-hero-carousel,.editorial-hero>.phase-hero-carousel{max-width:100%;margin-bottom:26px}.p2-hero-carousel .hero-slides,.editorial-hero>.phase-hero-carousel .hero-slides{aspect-ratio:4/3}}