:root{--navy:#071b33;--navy-2:#0d2d53;--blue:#075fbd;--blue-2:#1188db;--red:#e60012;--ink:#152235;--muted:#64748b;--line:#dbe4ee;--surface:#f4f7fb;--white:#fff;--shadow:0 18px 48px rgba(13,45,83,.1);--radius:6px;--wrap:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button{font:inherit}.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}.eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--blue);font-size:.82rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase}.eyebrow:before{content:"";width:24px;height:3px;background:var(--red)}
.top-strip{background:#f1f4f8;color:#5c6b7e;font-size:.8rem}.top-strip .wrap{min-height:34px;display:flex;align-items:center;justify-content:space-between}.top-strip a{color:var(--blue);font-weight:700}.masthead{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand-lockup{display:flex;align-items:center;gap:18px;min-width:0}.brand-lockup img{width:118px;height:78px;object-fit:contain;border-right:1px solid var(--line);padding-right:20px}.brand-copy{min-width:0}.brand-copy strong{display:block;color:var(--red);font-size:clamp(1.45rem,2vw,2.08rem);font-weight:850;line-height:1.25;letter-spacing:.02em}.brand-copy small{display:block;margin-top:8px;color:#55657a;font-size:.91rem;letter-spacing:.06em}.hotline{display:flex;align-items:center;gap:14px;color:var(--red)}.hotline-icon{display:grid;place-items:center;width:50px;height:50px;border:2px solid var(--navy-2);border-radius:50%;color:var(--navy-2);font-size:1.35rem}.hotline small{display:block;color:#6b7a8f;font-size:.72rem;letter-spacing:.14em}.hotline strong{display:block;font-size:clamp(1.55rem,2.4vw,2.35rem);line-height:1.1;letter-spacing:.02em}.nav-shell{position:relative;z-index:80;background:linear-gradient(90deg,#0757ad,#0769c7);box-shadow:0 7px 18px rgba(7,65,130,.15)}.nav-row{min-height:66px;display:flex;align-items:stretch}.menu-toggle{display:none;border:0;background:transparent;color:#fff;font-size:1.65rem;padding:14px 0}.main-nav{display:flex;align-items:stretch}.nav-item{position:relative;display:flex}.main-nav a{display:flex;align-items:center;justify-content:center;min-width:112px;padding:0 18px;color:#fff;font-size:1rem;border-right:1px solid rgba(255,255,255,.13);transition:.2s}.main-nav a:hover,.main-nav a.active{background:var(--red)}.has-sub>a:after{content:"⌄";margin-left:8px;font-size:.78em}.submenu{position:absolute;left:0;top:100%;display:none;width:190px;background:#fff;border-top:3px solid var(--red);box-shadow:0 18px 40px rgba(3,25,50,.2)}.has-sub:hover .submenu,.has-sub:focus-within .submenu{display:block}.submenu a{justify-content:flex-start;min-height:50px;min-width:0;padding:10px 22px;color:var(--ink);border-right:0;border-bottom:1px solid #edf1f5;font-size:.94rem}.submenu a:hover,.submenu a.active{background:#eef5fd;color:var(--blue)}.quote-link{align-self:center;margin-left:auto;padding:10px 22px;border-radius:4px;background:#fff;color:var(--blue);font-weight:800}.quote-link:hover{background:#fff4f5;color:var(--red)}
.hero{position:relative;height:600px;overflow:hidden;background:#dce5ef}.hero-slide{position:absolute;inset:0;opacity:0;pointer-events:none;background-size:cover;background-position:center;transition:opacity .7s ease}.hero-slide.active{opacity:1;pointer-events:auto}.hero-slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,24,48,.92) 0%,rgba(7,41,78,.68) 44%,rgba(7,41,78,.12) 78%)}.hero-content{position:relative;z-index:1;padding-top:118px;color:#fff}.hero-content .eyebrow{color:#cceaff}.hero-content h1,.hero-content h2{max-width:760px;margin:22px 0 20px;font-size:clamp(2.35rem,4vw,4rem);line-height:1.16;letter-spacing:-.02em}.hero-content p{max-width:620px;margin:0;color:#dceaf8;font-size:1.08rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;margin-top:30px;padding:13px 26px;border:1px solid transparent;border-radius:3px;background:var(--red);color:#fff;font-weight:800;transition:.2s}.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(230,0,18,.24)}.btn-outline{background:transparent;border-color:rgba(255,255,255,.65)}.hero-dots{position:absolute;z-index:3;left:50%;bottom:30px;display:flex;gap:9px;transform:translateX(-50%)}.hero-dots button{width:38px;height:4px;padding:0;border:0;background:rgba(255,255,255,.45);cursor:pointer}.hero-dots button.active{background:#fff}.proof-bar{position:relative;z-index:4;margin-top:-1px;background:#fff;box-shadow:var(--shadow)}.proof-grid{display:grid;grid-template-columns:repeat(4,1fr)}.proof-grid div{display:flex;gap:16px;align-items:center;min-height:116px;padding:25px 30px;border-right:1px solid var(--line)}.proof-grid div:last-child{border-right:0}.proof-grid b{color:#d2dce8;font-size:2rem}.proof-grid strong{display:block}.proof-grid span{display:block;color:var(--muted);font-size:.88rem}
.section{padding:104px 0}.section.alt{background:var(--surface)}.section.dark{background:linear-gradient(135deg,var(--navy),#0b477f);color:#fff}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:48px}.section-heading.center{display:block;text-align:center}.section-heading h2{margin:8px 0 0;font-size:clamp(2rem,3vw,2.8rem);line-height:1.25}.section-heading p{max-width:620px;margin:10px 0 0;color:var(--muted)}.section-heading.center p{margin:10px auto 0}.section-heading>a{color:var(--blue);font-weight:800}.product-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.product-card{display:flex;flex-direction:column;min-width:0;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(22,50,80,.05);transition:.25s}.product-card:hover{transform:translateY(-6px);border-color:#a9c8e8;box-shadow:var(--shadow)}.product-card img{width:100%;height:280px;object-fit:cover;background:#edf2f7}.product-card:first-child img{height:330px}.product-body{display:flex;flex:1;flex-direction:column;padding:28px}.product-no{color:var(--blue);font-size:.78rem;font-weight:800;letter-spacing:.12em}.product-card h3{margin:9px 0 10px;font-size:1.55rem}.product-card p{margin:0 0 24px;color:var(--muted)}.product-card .more{margin-top:auto;color:var(--blue);font-weight:800}.series-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.series-card{position:relative;overflow:hidden;min-height:310px;padding:34px 28px;background:#fff;border-top:4px solid var(--blue);box-shadow:0 10px 28px rgba(20,48,80,.07);transition:.25s}.series-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.series-code{color:#d8e5f3;font-size:2.15rem;font-weight:900;letter-spacing:.02em}.series-card h3{margin:18px 0 12px;font-size:1.3rem}.series-card p{color:var(--muted)}.series-card span{position:absolute;left:28px;bottom:28px;color:var(--blue);font-weight:800}.value-grid,.feature-grid,.news-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.value-card,.feature-card,.news-card{background:#fff;border:1px solid var(--line);padding:32px;box-shadow:0 8px 26px rgba(16,45,78,.05)}.value-card b,.feature-card b{display:inline-grid;place-items:center;width:42px;height:42px;background:#eaf3fc;color:var(--blue);border-radius:4px}.value-card h3,.feature-card h3,.news-card h3{margin:18px 0 10px}.value-card p,.feature-card p,.news-card p{margin:0;color:var(--muted)}.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.18)}.process-step{min-height:220px;padding:34px 28px;background:rgba(3,28,57,.62)}.process-step b{color:#64b9ff;font-size:2.3rem}.process-step h3{margin:22px 0 9px}.process-step p{margin:0;color:#cfe2f6}
.page-banner{position:relative;min-height:350px;display:flex;align-items:end;background-image:linear-gradient(90deg,rgba(4,24,47,.92),rgba(5,52,98,.54),rgba(5,52,98,.12)),var(--banner);background-size:cover;background-position:center}.page-banner-content{position:relative;z-index:1;padding:82px 0 70px;color:#fff}.breadcrumb{margin-bottom:18px;color:#cbdced;font-size:.88rem}.breadcrumb a:hover{color:#fff}.page-banner h1{margin:0;font-size:clamp(2.45rem,4vw,3.9rem);line-height:1.16}.page-banner p{max-width:680px;margin:16px 0 0;color:#dbe8f4;font-size:1.08rem}.content-section{padding:92px 0}.content-section.alt{background:var(--surface)}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:68px;align-items:center}.two-col img{width:100%;height:430px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}.content-title{margin:8px 0 18px;font-size:clamp(1.9rem,3vw,2.6rem);line-height:1.3}.lead{color:#4f6075;font-size:1.08rem;line-height:1.9}.check-list{display:grid;gap:12px;margin:26px 0 0;padding:0;list-style:none}.check-list li{position:relative;padding-left:28px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--red);font-weight:900}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:38px}.stat{padding:25px;background:var(--surface);border-left:3px solid var(--blue)}.stat strong{display:block;color:var(--navy);font-size:1.3rem}.stat span{color:var(--muted);font-size:.9rem}.subnav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:38px}.subnav a{padding:9px 16px;background:#eef3f8;color:#46586d;border-radius:3px}.subnav a.active,.subnav a:hover{background:var(--blue);color:#fff}.detail-image{width:100%;max-height:480px;object-fit:contain;background:#f1f5f9}.notice{margin:28px 0;padding:18px 22px;background:#fff7f1;border-left:4px solid #f08c42;color:#6f4b30}.code-box{padding:28px;background:var(--navy);color:#fff;border-left:5px solid var(--red);font-family:Consolas,monospace;font-size:clamp(1.15rem,2.2vw,1.75rem);letter-spacing:.04em;overflow-wrap:anywhere}.code-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}.code-grid div{padding:18px;background:#f5f8fb;border:1px solid var(--line)}.code-grid b{display:block;color:var(--blue)}
.table-wrap{width:100%;overflow-x:auto;margin-top:30px;border:1px solid var(--line);background:#fff;box-shadow:0 8px 28px rgba(19,47,78,.06)}table{width:100%;min-width:850px;border-collapse:collapse;font-size:.92rem}caption{padding:18px 20px;text-align:left;color:var(--navy);font-size:1.05rem;font-weight:800}th,td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}th{background:#eaf3fc;color:#173d67;font-weight:800}tbody tr:nth-child(even){background:#f8fafc}tbody tr:hover{background:#eef6ff}.table-note{margin-top:14px;color:var(--muted);font-size:.9rem}.selection-intro{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}.selection-flow{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-top:34px}.selection-flow div{position:relative;padding:22px 16px;background:#fff;border:1px solid var(--line);text-align:center}.selection-flow b{display:block;color:var(--red);font-size:.86rem}.selection-flow span{display:block;margin-top:7px;font-weight:800}.selection-flow div:not(:last-child):after{content:"›";position:absolute;right:-9px;top:50%;z-index:2;color:var(--blue);font-size:1.5rem;transform:translateY(-50%)}
.catalog-gallery{display:grid;grid-template-columns:minmax(0,1fr);gap:30px;min-width:0;margin-top:34px}.catalog-sheet{min-width:0;max-width:100%;margin:0;background:#fff;border:1px solid var(--line);box-shadow:0 12px 32px rgba(16,45,78,.07)}.catalog-sheet-scroll{width:100%;max-width:100%;overflow-x:auto}.catalog-sheet img{width:100%;height:auto;min-width:960px}.catalog-sheet figcaption{display:flex;justify-content:space-between;gap:20px;padding:15px 20px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}.catalog-sheet figcaption a{color:var(--blue);font-weight:800;white-space:nowrap}.catalog-note{margin-top:18px;padding:18px 22px;background:#eef5fd;border-left:4px solid var(--blue);color:#42566d}
.news-layout{display:grid;grid-template-columns:260px 1fr;gap:44px}.category-panel{align-self:start;padding:24px;background:var(--navy);color:#fff}.category-panel h3{margin:0 0 18px}.category-panel a{display:block;padding:12px 13px;border-top:1px solid rgba(255,255,255,.15)}.category-panel a.active,.category-panel a:hover{background:var(--red)}.news-list{display:grid;gap:18px}.news-item{display:grid;grid-template-columns:110px 1fr;gap:24px;padding:26px;background:#fff;border:1px solid var(--line);transition:.2s}.news-item:hover{border-color:#aac9e8;box-shadow:var(--shadow)}.news-tag{color:var(--blue);font-weight:800}.news-item h2{margin:2px 0 9px;font-size:1.3rem}.news-item p{margin:0;color:var(--muted)}.faq-list{display:grid;gap:14px}.faq-list details{background:#fff;border:1px solid var(--line)}.faq-list summary{cursor:pointer;padding:20px 24px;font-weight:800;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";float:right;color:var(--blue);font-size:1.35rem}.faq-list details[open] summary:after{content:"−"}.faq-answer{padding:0 24px 22px;color:var(--muted)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.contact-card{padding:34px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 26px rgba(16,45,78,.05)}.contact-card h3{margin-top:0}.contact-card a{color:var(--blue);font-weight:800}.cta{padding:58px 0;background:var(--red);color:#fff}.cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{margin:0 0 8px;font-size:2rem}.cta p{margin:0;color:#ffe0e3}.cta a{padding:14px 24px;background:#fff;color:var(--red);font-weight:900;border-radius:3px}.footer{background:var(--navy);color:#b8c8d9}.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:46px;padding:62px 0}.footer strong{display:block;color:#fff;font-size:1.25rem}.footer p{margin:12px 0 0}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:9px}.footer a:hover{color:#fff}.footer-phone{color:#fff;font-size:1.55rem;font-weight:800}.copyright{padding:17px 24px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:.82rem}.float-call{position:fixed;right:22px;bottom:24px;z-index:40;display:grid;place-items:center;width:66px;height:66px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;box-shadow:0 10px 25px rgba(0,0,0,.2)}.dimension-image{width:100%;height:auto;border:1px solid var(--line);background:#fff}.empty-state{padding:44px;background:#f7f9fc;border:1px dashed #b9c6d5;text-align:center;color:var(--muted)}
@media(max-width:1120px){.main-nav a{min-width:auto;padding:0 13px;font-size:.92rem}.brand-copy strong{font-size:1.55rem}.product-grid{grid-template-columns:1.5fr 1fr 1fr}.series-grid{grid-template-columns:repeat(2,1fr)}.selection-flow{grid-template-columns:repeat(4,1fr)}.selection-flow div:after{display:none}}
@media(max-width:900px){.wrap{width:min(100% - 34px,var(--wrap))}.masthead{min-height:90px}.brand-lockup img{width:82px;height:62px;padding-right:12px}.brand-copy strong{font-size:1.18rem}.brand-copy small{font-size:.76rem}.hotline{display:none}.nav-row{display:block;min-height:58px}.menu-toggle{display:block}.main-nav{display:none;flex-direction:column;padding-bottom:14px}.main-nav.is-open{display:flex}.nav-item{display:block}.main-nav a{justify-content:flex-start;min-height:48px;border-right:0}.submenu{position:static;width:100%;box-shadow:none;border-top:0;background:#064c98}.has-sub:hover .submenu{display:none}.has-sub.open .submenu{display:block}.submenu a{padding-left:38px;color:#fff;border-color:rgba(255,255,255,.1)}.submenu a:hover{background:#083e79;color:#fff}.quote-link{display:none}.hero{height:520px}.hero-content{padding-top:88px}.proof-grid{grid-template-columns:repeat(2,1fr)}.product-grid,.two-col,.selection-intro,.news-layout,.contact-grid{grid-template-columns:1fr}.product-card:first-child img,.product-card img{height:280px}.value-grid,.feature-grid,.news-cards{grid-template-columns:1fr 1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}.page-banner{min-height:300px}.selection-flow{grid-template-columns:repeat(2,1fr)}.footer-main{grid-template-columns:1fr 1fr}.footer-main>div:first-child{grid-column:1/-1}}
@media(max-width:600px){body{font-size:16px}.wrap{width:min(100% - 26px,var(--wrap))}.top-strip{display:none}.masthead{min-height:82px}.brand-lockup{gap:10px}.brand-lockup img{width:64px;height:52px;padding-right:8px}.brand-copy strong{font-size:1rem;white-space:normal}.brand-copy small{display:none}.hero{height:470px}.hero-content{padding-top:70px}.hero-content h1,.hero-content h2{font-size:2.15rem}.proof-grid,.product-grid,.series-grid,.value-grid,.feature-grid,.news-cards,.process-grid,.stat-grid,.selection-flow,.footer-main{grid-template-columns:1fr}.proof-grid div{min-height:94px}.section,.content-section{padding:68px 0}.section-heading{display:block;margin-bottom:34px}.section-heading>a{display:inline-block;margin-top:16px}.product-card:first-child img,.product-card img{height:230px}.series-card{min-height:280px}.page-banner{min-height:260px}.page-banner-content{padding:60px 0 48px}.two-col{gap:34px}.two-col img{height:290px}.news-item{grid-template-columns:1fr;gap:8px}.cta .wrap{display:block}.cta a{display:inline-block;margin-top:24px}.footer-main{padding:46px 0}.float-call{right:14px;bottom:16px;width:58px;height:58px}}

/* 第二轮定点修复：下拉菜单严格与对应一级导航同宽 */
.nav-item.has-sub{position:relative}
.nav-item.has-sub>.submenu{left:0;right:auto;width:100%;min-width:0;max-width:100%}
.nav-item.has-sub>.submenu a{justify-content:center;width:100%;min-width:0;padding-left:8px;padding-right:8px;line-height:1.35;text-align:center;white-space:normal}

/* 第二轮定点修复：产品尺寸图完整显示、内部滚动和大图预览 */
.product-detail-layout{display:block}
.product-detail-copy{max-width:920px;margin-bottom:42px}
.dimension-figure{min-width:0;margin:0;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.dimension-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 20px;border-bottom:1px solid var(--line);font-weight:800}
.dimension-toolbar button{padding:9px 16px;border:0;border-radius:3px;background:var(--blue);color:#fff;font-weight:800;cursor:pointer}
.dimension-stage{width:100%;max-width:100%;overflow:auto;padding:24px;background:#f7f9fc}
.dimension-stage .dimension-image{display:block;width:auto;min-width:900px;max-width:none;height:auto;max-height:none;margin:0 auto;border:1px solid var(--line);background:#fff;object-fit:contain;cursor:zoom-in}
.image-modal{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(3,14,28,.92)}
.image-modal.is-open{display:flex}
.image-modal__viewport{width:min(96vw,1500px);height:min(90vh,1100px);overflow:auto;background:#fff;box-shadow:0 24px 80px rgba(0,0,0,.45)}
.image-modal__viewport img{display:block;width:auto;min-width:1000px;max-width:none;height:auto;max-height:none;margin:0 auto;object-fit:contain}
.image-modal__close{position:fixed;top:18px;right:22px;z-index:1;width:46px;height:46px;border:1px solid rgba(255,255,255,.5);border-radius:50%;background:#fff;color:var(--navy);font-size:1.55rem;line-height:1;cursor:pointer}
.image-modal__hint{position:fixed;left:50%;bottom:12px;transform:translateX(-50%);color:#fff;font-size:.82rem;white-space:nowrap}
.modal-open{overflow:hidden}
@media(max-width:900px){.nav-item.has-sub>.submenu{position:static;width:100%;max-width:none}.product-detail-copy{margin-bottom:30px}.dimension-stage{padding:14px}.dimension-stage .dimension-image{min-width:900px}.image-modal{padding:12px}.image-modal__viewport{width:96vw;height:88vh}.image-modal__close{top:10px;right:10px}}