/* ========== 深色 Hero ========== */
.about-hero-dark{position:relative;overflow:hidden;padding:100px 0 80px;background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 50%,#0f172a 100%);color:#fff}
.about-hero-dark::before{content:'';position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(90deg,rgba(255,255,255,.015) 0px,rgba(255,255,255,.015) 1px,transparent 1px,transparent 60px),repeating-linear-gradient(0deg,rgba(255,255,255,.01) 0px,rgba(255,255,255,.01) 1px,transparent 1px,transparent 60px)}
.about-hero-bg-decor{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.ahd-ring{position:absolute;border-radius:50%;border:1.5px solid rgba(108,196,255,.12)}
.ahd-ring-1{width:500px;height:500px;top:-100px;right:-100px;animation:ahdSpin 25s linear infinite}
.ahd-ring-2{width:350px;height:350px;bottom:-80px;left:-60px;animation:ahdSpin 18s linear infinite reverse;border-color:rgba(47,125,246,.15)}
.ahd-ring-3{width:200px;height:200px;top:50%;left:50%;transform:translate(-50%,-50%);animation:ahdSpin3 12s linear infinite;border-color:rgba(108,196,255,.18)}
@keyframes ahdSpin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@keyframes ahdSpin3{from{transform:translate(-50%,-50%) rotate(0deg)}to{transform:translate(-50%,-50%) rotate(360deg)}}
.about-hero-dark-inner{position:relative;z-index:1;text-align:center}
.about-hero-dark-en{display:inline-block;font-size:.78rem;letter-spacing:.35em;color:#6cc4ff;font-weight:700;margin-bottom:16px;padding:5px 16px;border:1px solid rgba(108,196,255,.3);border-radius:999px}
.about-hero-dark h1{font-size:clamp(2rem,4vw,3rem);margin:0 0 16px;color:#fff;font-weight:800}
.about-hero-dark-sub{color:rgba(255,255,255,.75);font-size:1.05rem;margin:0 0 20px;max-width:600px;margin-left:auto;margin-right:auto}
.about-hero-dark-line{width:48px;height:3px;margin:0 auto 40px;border-radius:2px;background:linear-gradient(90deg,#2f7df6,#6cc4ff)}

/* ========== 联系我们 ========== */

/* 联系方式卡片 */
.contact-info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.contact-info-card{padding:32px 24px;border-radius:16px;background:#fff;border:1px solid #eee;text-align:center;transition:all .35s;position:relative;overflow:hidden}
.contact-info-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#2f7df6,#6cc4ff);transform:scaleX(0);transform-origin:left;transition:transform .4s ease}
.contact-info-card:hover::before{transform:scaleX(1)}
.contact-info-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(0,0,0,.08);border-color:rgba(47,125,246,.15)}
.contact-info-icon{width:60px;height:60px;border-radius:16px;background:rgba(47,125,246,.08);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;color:#2f7df6;transition:all .4s ease}
.contact-info-card:hover .contact-info-icon{background:linear-gradient(135deg,#2f7df6,#6cc4ff);color:#fff;transform:scale(1.1) rotate(-5deg);box-shadow:0 8px 24px rgba(47,125,246,.3)}
.contact-info-card h4{font-size:17px;font-weight:700;color:#1f2937;margin:0 0 10px;transition:color .3s}
.contact-info-card:hover h4{color:#2f7df6}
.contact-info-value{font-size:15px;font-weight:700;color:#0f172a;margin:0 0 6px}
.contact-info-desc{font-size:13px;color:#6b7280;margin:0}

/* 表单区域 */
.contact-form-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.contact-form-left h3{font-size:1.5rem;font-weight:800;color:#0f172a;margin:0 0 12px}
.contact-form-left>p{font-size:.95rem;color:#6b7280;line-height:1.8;margin:0 0 28px}
.contact-form-features{display:flex;flex-direction:column;gap:16px}
.contact-feature-item{display:flex;align-items:center;gap:12px;font-size:.95rem;color:#1f2937;font-weight:600}
.contact-feature-item svg{color:#2f7df6;flex-shrink:0}
.contact-form-right{background:#fff;border-radius:16px;padding:36px;border:1px solid #eee;box-shadow:0 4px 24px rgba(0,0,0,.04)}
.contact-form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-form-group{margin-bottom:18px}
.contact-form-group label{display:block;font-size:.85rem;font-weight:600;color:#1f2937;margin-bottom:8px}
.contact-form-group .required{color:#ef4444}
.contact-form-group input,.contact-form-group select,.contact-form-group textarea{width:100%;padding:12px 16px;border:1.5px solid #e5e7eb;border-radius:10px;font-size:.9rem;color:#1f2937;background:#f8fafc;transition:all .25s ease;outline:none;font-family:inherit}
.contact-form-group input:focus,.contact-form-group select:focus,.contact-form-group textarea:focus{border-color:#2f7df6;background:#fff;box-shadow:0 0 0 3px rgba(47,125,246,.1)}
.contact-form-group input::placeholder,.contact-form-group textarea::placeholder{color:#9ca3af}
.contact-form-group textarea{min-height:120px;resize:vertical}
.contact-submit-btn{width:100%;padding:14px;font-size:1rem;gap:8px;border:none;cursor:pointer}

/* 地图区域 */
.contact-map-section{background:#f5f8fc}
.contact-map-wrap{display:grid;grid-template-columns:320px 1fr;gap:0;border-radius:16px;overflow:hidden;border:1px solid #eee;background:#fff}
.contact-map-info{padding:36px 28px;display:flex;flex-direction:column;gap:24px;background:linear-gradient(180deg,#f0f5ff,#fff)}
.contact-map-info-item{display:flex;align-items:flex-start;gap:14px}
.contact-map-info-icon{width:44px;height:44px;border-radius:12px;background:rgba(47,125,246,.08);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#2f7df6}
.contact-map-info-item strong{display:block;font-size:.9rem;color:#1f2937;margin-bottom:4px}
.contact-map-info-item span{font-size:.85rem;color:#6b7280}
.contact-map{min-height:400px}

/* FAQ */
.contact-faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.contact-faq-item{background:#fff;border-radius:14px;border:1px solid #eee;overflow:hidden;transition:all .3s}
.contact-faq-item:hover{box-shadow:0 8px 24px rgba(0,0,0,.06);border-color:rgba(47,125,246,.15)}
.contact-faq-q{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;font-size:.95rem;font-weight:700;color:#1f2937;gap:12px;transition:color .3s}
.contact-faq-q:hover{color:#2f7df6}
.faq-arrow{flex-shrink:0;transition:transform .3s ease;color:#6b7280}
.contact-faq-item.open .faq-arrow{transform:rotate(180deg);color:#2f7df6}
.contact-faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;padding:0 24px;font-size:.9rem;color:#6b7280;line-height:1.8}
.contact-faq-item.open .contact-faq-a{max-height:200px;padding:0 24px 20px}

/* 滚动入场 */
.scroll-reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.scroll-reveal.visible{opacity:1;transform:translateY(0)}

@media(max-width:1024px){
    .contact-info-grid{grid-template-columns:repeat(2,1fr)}
    .contact-form-wrap{grid-template-columns:1fr}
    .contact-map-wrap{grid-template-columns:1fr}
    .contact-faq-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
    .contact-info-grid{grid-template-columns:1fr}
    .contact-form-row{grid-template-columns:1fr}
    .contact-form-right{padding:24px}
    .contact-map-info{padding:24px}
    .about-hero-dark{padding:70px 0 50px}
    .about-hero-dark h1{font-size:1.8rem}
}