/* ===== 曼赫科技官网 — 主样式表 ===== */
/* 工业蓝配色 · 克制 · 专业 · 制造业质感 */
:root{
--p:#1a3a6b;--p-dark:#0d2447;--p-light:#2a5090;
--s:#c8953a;--s-dark:#a67a2e;
--bg-light:#f2f5f8;--bg-gray:#e8ecf1;
--t-title:#1a1f2e;--t-body:#4a5568;--t-light:#8899aa;
--white:#fff;--radius:6px;
--font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
--nav-h:64px;--maxw:1200px;
--shadow-sm:0 1px 3px rgba(0,0,0,.06);--shadow-md:0 4px 12px rgba(0,0,0,.08);
--ease:cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{font-family:var(--font);color:var(--t-body);line-height:1.6;background:var(--white)}
a{color:var(--p);text-decoration:none;transition:color .2s}a:hover{color:var(--p-light)}
ul{list-style:none}img{max-width:100%;height:auto;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;top:-100px;left:16px;background:var(--p);color:#fff;padding:8px 16px;border-radius:4px;z-index:10000}.skip-link:focus{top:16px}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);background:rgba(13,36,71,.96);backdrop-filter:blur(8px)}.nav-row{display:flex;align-items:center;justify-content:space-between;height:100%}.nav-logo{display:flex;align-items:center;gap:8px}.logo-text{color:#fff;font-weight:700;font-size:15px}.nav-links{display:flex;align-items:center;gap:0}.nav-links>li>a{display:flex;align-items:center;height:var(--nav-h);padding:0 16px;color:rgba(255,255,255,.82);font-size:14px;font-weight:500;transition:.15s}.nav-links>li>a:hover,.nav-links>li.active>a{color:#fff;background:rgba(255,255,255,.06)}.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}.menu-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:1px;transition:.3s}.menu-open .menu-toggle span:nth-child(1){transform:translateY(7px)rotate(45deg)}.menu-open .menu-toggle span:nth-child(2){opacity:0}.menu-open .menu-toggle span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}

/* hero */
.hero{position:relative;height:80vh;min-height:520px;overflow:hidden;background:#0d2447;display:flex;align-items:flex-end}
.hero video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,36,71,.2)0%,rgba(13,36,71,.3)40%,rgba(13,36,71,.85)100%);z-index:1}
.hero-content{position:relative;z-index:2;padding-bottom:60px;width:100%}
.hero-content h1{font-size:38px;font-weight:800;color:#fff;line-height:1.25;margin-bottom:16px;max-width:680px;letter-spacing:.02em}
.hero-content .hero-sub{font-size:16px;color:rgba(255,255,255,.88);line-height:1.7;max-width:560px;margin-bottom:28px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 32px;font-size:15px;font-weight:600;border:2px solid transparent;border-radius:var(--radius);cursor:pointer;transition:.2s;letter-spacing:.02em;text-decoration:none}
.btn-pri{background:var(--s);color:#fff;border-color:var(--s)}.btn-pri:hover{background:var(--s-dark);border-color:var(--s-dark);color:#fff}
.btn-out{color:#fff;border-color:rgba(255,255,255,.5);background:transparent}.btn-out:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.logo-badge{height:38px;width:38px;display:block;flex-shrink:0}

/* sections */
.phead{padding:120px 0 40px;background:linear-gradient(135deg,var(--p-dark),var(--p));text-align:center;color:#fff}.phead h1{font-size:32px;font-weight:800}.card{background:#fff;border:1px solid var(--bg-gray);border-radius:var(--radius);padding:28px}
.hero-content{position:relative;z-index:2;padding-top:80px}.hero-bg{background:linear-gradient(135deg,var(--p-dark) 0%,#1a3a6b 50%,#0d2447 100%);min-height:85vh;display:flex;align-items:center}.hero-bg .hero-overlay{background:linear-gradient(180deg,rgba(13,36,71,.15) 0%,rgba(13,36,71,.3) 100%)}
.sec{padding:72px 0}.sec.bg{background:var(--bg-light)}
.sec-header{text-align:center;margin-bottom:44px}
.sec-header .en-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.18em;color:var(--p);margin-bottom:6px}
.sec-header .cn-title{font-size:30px;font-weight:800;color:var(--t-title);position:relative;display:inline-block}.sec-header .cn-title::after{content:'';display:block;width:36px;height:3px;background:var(--s);margin:10px auto 0;border-radius:2px}

/* grid layouts */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid-6{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}

/* biz cards */
.biz-card{background:#fff;border:1px solid var(--bg-gray);border-radius:var(--radius);padding:24px;transition:.2s}.biz-card:hover{border-color:var(--p);box-shadow:var(--shadow-md)}.biz-card h3{font-size:17px;font-weight:700;color:var(--t-title);margin-bottom:8px}.biz-card p{font-size:14px;color:var(--t-body);line-height:1.7}

/* product cards */
.pcard{display:block;color:inherit;background:#fff;border:1px solid var(--bg-gray);border-radius:var(--radius);overflow:hidden;transition:.25s}.pcard:hover{border-color:var(--p);box-shadow:var(--shadow-md);transform:translateY(-2px)}.pcard .card-img{height:200px;background:var(--bg-light);overflow:hidden}.pcard .card-img img{width:100%;height:100%;object-fit:contain;padding:12px}.pcard .card-body{padding:20px}.pcard .card-body h3{font-size:17px;font-weight:700;color:var(--t-title);margin-bottom:8px}.pcard .card-body p{font-size:14px;color:var(--t-body);line-height:1.7}.pcard .card-link{display:inline-block;margin-top:10px;font-size:13px;font-weight:600;color:var(--p)}.pcard:hover .card-link{color:var(--p-light)}

/* app / cap cards */
.app-card,.cap-item{background:var(--bg-light);border-radius:var(--radius);padding:16px 12px;text-align:center;font-size:14px;font-weight:600;color:var(--t-title);transition:.2s}.app-card:hover,.cap-item:hover{background:var(--p);color:#fff}

/* flow */
.flow{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.flow-step{text-align:center;padding:20px 12px;border:1px solid var(--bg-gray);border-radius:var(--radius);background:#fff}.flow-step .step-num{font-size:28px;font-weight:800;color:var(--p);margin-bottom:8px;line-height:1}.flow-step h3{font-size:14px;font-weight:700;color:var(--t-title);margin-bottom:6px}.flow-step p{font-size:12px;color:var(--t-body);line-height:1.6}

/* stats */
.stats-row{display:flex;justify-content:center;gap:0;flex-wrap:wrap}.st{flex:1;min-width:120px;text-align:center;padding:20px;border-right:1px solid #e0e0e0}.st:last-child{border:none}.st-num{font-size:42px;font-weight:800;color:var(--p);line-height:1}.st-label{font-size:13px;color:var(--t-light);margin-top:6px}

/* partners */
.partner-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}.plogo{display:flex;align-items:center;justify-content:center;padding:16px;border:1px solid var(--bg-gray);border-radius:var(--radius);background:#fff;filter:grayscale(100%);opacity:.55;transition:.3s;flex:0 0 calc(16.66% - 12px);min-width:130px}.plogo:hover{filter:none;opacity:1;border-color:var(--s)}.plogo img{max-height:44px;max-width:110px;object-fit:contain}

/* timeline */
.timeline-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:32px}
@media(max-width:768px){.timeline-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:390px){.timeline-grid{grid-template-columns:1fr}}

/* cta */
.cta{background:var(--p-dark);padding:64px 0;text-align:center;color:#fff}.cta h2{font-size:28px;font-weight:800;margin-bottom:12px}.cta p{color:rgba(255,255,255,.7);max-width:520px;margin:0 auto 24px;font-size:15px;line-height:1.7}

/* footer */
.foot{background:var(--p-dark);color:rgba(255,255,255,.5);padding:48px 0 0}.foot-grid{display:grid;grid-template-columns:1.5fr 1.5fr 1.2fr;gap:32px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08)}.foot-col h4{font-size:14px;font-weight:700;color:rgba(255,255,255,.7);margin-bottom:14px}.foot-col ul li{margin-bottom:8px;font-size:13px}.foot-col ul li a{color:rgba(255,255,255,.5)}.foot-col ul li a:hover{color:#fff}.foot-bottom{text-align:center;padding:16px 0;font-size:12px;color:rgba(255,255,255,.3)}

/* back to top */
#btt{position:fixed;bottom:24px;right:24px;width:40px;height:40px;background:var(--p);color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-size:18px;opacity:0;visibility:hidden;transition:.3s;z-index:999}#btt.show{opacity:1;visibility:visible}#btt:hover{background:var(--p-light)}#btt:focus-visible{outline:2px solid #fff;outline-offset:2px}

/* reduced motion */
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* responsive */
@media(max-width:1024px){.grid-6{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(2,1fr)}.flow{grid-template-columns:repeat(3,1fr)}.partner-grid .plogo{flex:0 0 calc(25% - 12px)}}
body.menu-open{overflow:hidden}
body.menu-open .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:var(--p-dark);flex-direction:column;padding:24px 16px;overflow-y:auto;z-index:999;list-style:none;margin:0;max-height:calc(100vh - var(--nav-h));opacity:1;box-shadow:0 8px 32px rgba(0,0,0,.3)}
body.menu-open .nav-links li{list-style:none;width:100%;border-bottom:1px solid rgba(255,255,255,.06)}
body.menu-open .nav-links li>a{display:block;color:#fff;padding:18px 12px;font-size:16px;font-weight:500;width:100%;border:none}
body.menu-open .nav-links li>a:hover,body.menu-open .nav-links li.active>a{color:var(--s);background:rgba(255,186,0,.08);border-left:3px solid var(--s);padding-left:9px}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:1px;transition:.3s}
/* ---- page-specific components ---- */
.filter-bar{display:flex;justify-content:center;gap:8px;margin-bottom:36px;flex-wrap:wrap}.f-btn{padding:8px 24px;border:2px solid var(--bg-gray);border-radius:var(--radius);background:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:.2s;color:var(--t-body)}.f-btn.active,.f-btn:hover{background:var(--p);color:#fff;border-color:var(--p)}.f-btn:focus-visible{outline:2px solid var(--p);outline-offset:2px}
.detail-row{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}.detail-media{display:flex;flex-direction:column}.detail-img{background:var(--bg-light);border-radius:var(--radius);padding:32px;display:flex;align-items:center;justify-content:center;min-height:360px}.detail-img img,.detail-img svg{max-width:100%;max-height:340px;object-fit:contain}.detail-info h2{font-size:26px;font-weight:800;color:var(--t-title);margin-bottom:8px}.detail-info .cat-tag{display:inline-block;padding:4px 14px;background:var(--p);color:#fff;font-size:12px;font-weight:600;border-radius:4px;margin-bottom:16px}.detail-info .desc{font-size:15px;color:var(--t-body);line-height:1.9;margin-bottom:24px}.back-link{display:inline-flex;align-items:center;gap:4px;color:var(--p);font-size:14px;margin-bottom:20px}.back-link:hover{color:var(--p-light)}.image-note{font-size:12px;color:var(--t-light);margin-top:8px;text-align:center}
.app-box{padding:32px 24px;background:#fff;border:1px solid var(--bg-gray);border-radius:var(--radius);text-align:center;transition:.2s}.app-box:hover{border-color:var(--p);box-shadow:var(--shadow-md)}.app-box h3{font-size:17px;font-weight:700;color:var(--t-title);margin-bottom:10px}.app-box p{font-size:14px;color:var(--t-body);line-height:1.7}
.contact-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;align-items:stretch}.contact-card{background:var(--p-dark);color:#fff;border-radius:var(--radius);padding:36px;display:flex;flex-direction:column}.contact-card h2{font-size:22px;font-weight:700;margin-bottom:24px}.contact-card .item{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px;font-size:14px;line-height:1.8}.contact-card .item strong{display:block;width:100%;margin-bottom:2px}.copy-btn{display:inline-block;padding:4px 12px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:4px;color:rgba(255,255,255,.8);font-size:12px;cursor:pointer;transition:.2s}.copy-btn:hover{background:rgba(255,255,255,.18)}.checklist{background:var(--bg-light);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column}.checklist h3{font-size:17px;font-weight:700;color:var(--t-title);margin-bottom:14px}.checklist ul{flex:1}.checklist li{font-size:14px;color:var(--t-body);padding:6px 0;padding-left:20px;position:relative;line-height:1.7}.checklist li::before{content:'*';position:absolute;left:4px;color:var(--p)}.follow-card{padding:28px;display:flex;flex-direction:column;background:#fff;border:1px solid var(--bg-gray);border-radius:var(--radius)}.follow-card h3{font-size:17px;font-weight:700;color:var(--t-title);margin-bottom:18px}.qr-row{display:flex;gap:20px;margin-bottom:24px}.qr-item{text-align:center}.qr-item img{width:96px;height:96px;display:block}.qr-item p{font-size:12px;color:var(--t-light);margin-top:6px}.extra-tip{font-size:13px;color:var(--t-body);line-height:1.8;padding:14px 16px;background:var(--bg-light);border-left:3px solid var(--p);border-radius:4px;margin-top:auto}.faq-item{border:1px solid var(--bg-gray);border-radius:var(--radius);padding:20px;margin-bottom:12px;background:#fff}.faq-item h3{font-size:16px;font-weight:700;color:var(--t-title);margin-bottom:8px}.faq-item p{font-size:14px;color:var(--t-body);line-height:1.8}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--p);color:#fff;padding:10px 24px;border-radius:var(--radius);font-size:14px;z-index:9999;opacity:0;transition:opacity .3s;pointer-events:none}#toast.show{opacity:1}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr;gap:16px}}
@media(max-width:768px){.detail-row{grid-template-columns:1fr}:root{--nav-h:56px}.nav-links{position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:var(--p-dark);flex-direction:column;padding:16px;overflow-y:auto;z-index:999;list-style:none;margin:0;max-height:0;overflow:hidden;opacity:0;transition:max-height .3s ease,opacity .2s ease}.nav-links.show{max-height:calc(100vh - var(--nav-h));opacity:1}.nav-links li{list-style:none;width:100%}.nav-links li>a{display:block;color:#fff;padding:16px 12px;font-size:15px;font-weight:500;border-bottom:1px solid rgba(255,255,255,.08);width:100%}.nav-links li>a:hover,.nav-links li.active>a{color:var(--s);background:rgba(255,186,0,.06);border-left:3px solid var(--s);padding-left:9px}.menu-toggle{display:flex;align-items:center;justify-content:center}.logo-text{display:inline}.hero{height:70vh;min-height:420px}.hero-content h1{font-size:26px}.hero-content .hero-sub{font-size:15px}.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:1fr}.grid-6{grid-template-columns:repeat(2,1fr)}.flow{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr;gap:20px}.sec{padding:48px 0}.sec-header .cn-title{font-size:24px}.stats-row{gap:0}.st{border-right:none;border-bottom:1px solid #e0e0e0;flex:0 0 50%}.st:last-child,.st:nth-child(3){border-bottom:none}.partner-grid .plogo{flex:0 0 calc(33.33% - 12px);min-width:90px}.btn{padding:10px 24px;font-size:14px}}
@media(max-width:390px){.hero{min-height:360px}.hero-content h1{font-size:22px}.partner-grid .plogo{flex:0 0 calc(50% - 8px)}}