:root{
    --primary-deep:#0E3A8C;
    --primary:#165DFF;
    --accent:#00D4FF;
    --bg-light:#F5F7FA;
    --text-dark:#1D2129;
    --text-secondary:#4E5969;
    --white:#FFFFFF;
    --border-light:#e8ecf3;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'PingFang SC','Microsoft YaHei',-apple-system,sans-serif;color:var(--text-dark);background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ================= Header ================= */
.site-header{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 10px rgba(0,0,0,.05);z-index:100}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--primary-deep);white-space:nowrap}
.logo img{height:42px}
.main-nav a{margin:0 18px;font-weight:500;transition:.2s;position:relative}
.main-nav a:hover{color:var(--primary)}
.main-nav a:hover::after{content:'';position:absolute;bottom:-6px;left:0;right:0;height:2px;background:var(--accent)}

.header-right{display:flex;align-items:center;gap:16px}
.lang-switch{display:flex;align-items:center;gap:4px}
.lang-switch a{color:var(--text-secondary);padding:0 4px;transition:.2s}
.lang-switch a:hover{color:var(--primary)}
.lang-switch a.active{color:var(--primary);font-weight:700}
.lang-sep{color:#ccc}

/* 移动端汉堡按钮（PC 隐藏） */
.nav-toggle{
    display:none;
    flex-direction:column;justify-content:space-between;
    width:26px;height:20px;
    background:transparent;border:none;cursor:pointer;padding:0;
}
.nav-toggle span{
    display:block;width:100%;height:2px;
    background:var(--primary-deep);border-radius:2px;transition:.3s;
}

/* ================= Hero 轮播区 ================= */
.hero-slider{
    position:relative;
    height:88vh;min-height:560px;max-height:780px;
    overflow:hidden;color:#fff;
}
.hero-slides{position:absolute;inset:0}
.hero-slide{
    position:absolute;inset:0;
    background-size:cover;background-position:center;
    opacity:0;transition:opacity 1.2s ease-in-out;
    transform:scale(1.05);
    animation:kenburns 8s ease-out infinite alternate;
}
.hero-slide.active{opacity:1;z-index:1}
@keyframes kenburns{
    0%{transform:scale(1.05)}
    100%{transform:scale(1.15)}
}
.hero-mask{
    position:absolute;inset:0;z-index:2;
    background:linear-gradient(135deg,rgba(0,0,0,.55) 0%,rgba(0,0,0,.35) 50%,rgba(0,0,0,.55) 100%);
}
.hero-content{
    position:relative;z-index:3;height:100%;
    display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
    text-align:left;padding-top:60px;
}
.hero-title{
    font-size:56px;font-weight:800;line-height:1.2;margin-bottom:22px;
    text-shadow:0 4px 20px rgba(0,0,0,.4);
    animation:fadeUp .9s ease-out;
}
.hero-subtitle{
    font-size:20px;max-width:680px;
    opacity:.95;margin-bottom:38px;line-height:1.7;
    text-shadow:0 2px 10px rgba(0,0,0,.3);
    animation:fadeUp 1.1s ease-out;
}
.hero-actions{display:flex;gap:18px;animation:fadeUp 1.3s ease-out}
@keyframes fadeUp{
    from{opacity:0;transform:translateY(30px)}
    to{opacity:1;transform:translateY(0)}
}
.hero-actions .btn-primary{
    background:var(--accent);color:#0b1f4d;
    padding:14px 36px;font-weight:600;
    box-shadow:0 8px 24px rgba(0,212,255,.4);
    border-radius:6px;transition:.3s;
}
.hero-actions .btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,212,255,.55)}
.hero-actions .btn-outline{
    background:rgba(255,255,255,.1);
    border:2px solid rgba(255,255,255,.6);
    color:#fff;padding:12px 34px;
    backdrop-filter:blur(6px);border-radius:6px;transition:.3s;
}
.hero-actions .btn-outline:hover{background:#fff;color:var(--primary-deep);border-color:#fff}

.hero-indicators{
    position:absolute;bottom:36px;left:50%;transform:translateX(-50%);
    z-index:4;display:flex;gap:12px;
}
.indicator{
    width:36px;height:4px;border-radius:2px;
    background:rgba(255,255,255,.4);cursor:pointer;transition:.3s;
}
.indicator:hover{background:rgba(255,255,255,.7)}
.indicator.active{background:var(--accent);width:54px}

.hero-arrow{
    position:absolute;top:50%;transform:translateY(-50%);z-index:4;
    width:54px;height:54px;border-radius:50%;
    background:rgba(255,255,255,.15);
    border:1px solid rgba(255,255,255,.3);
    color:#fff;font-size:32px;line-height:1;
    cursor:pointer;backdrop-filter:blur(8px);transition:.3s;
    display:flex;align-items:center;justify-content:center;
}
.hero-arrow:hover{background:rgba(255,255,255,.3);transform:translateY(-50%) scale(1.08)}
.hero-arrow.prev{left:30px}
.hero-arrow.next{right:30px}

/* ================= Products（首页产品区）================= */
.products-section{padding:80px 0;background:var(--bg-light)}
.section-title{
    text-align:center;font-size:36px;margin-bottom:16px;
    color:var(--primary-deep);position:relative;
}
.section-title::after{
    content:'';display:block;width:60px;height:4px;
    background:var(--accent);margin:15px auto 0;border-radius:2px;
}
/* 新增：段落副标题 */
.section-subtitle{
    text-align:center;font-size:16px;color:var(--text-secondary);
    max-width:720px;margin:0 auto 50px;line-height:1.7;
}

.product-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:30px;
}
.product-card{
    background:#fff;padding:40px 30px;border-radius:12px;
    text-align:center;transition:.3s;border:1px solid var(--border-light);
    display:flex;flex-direction:column;align-items:center;
}
.product-card:hover{
    transform:translateY(-8px);
    box-shadow:0 20px 40px rgba(22,93,255,.15);
    border-color:var(--accent);
}
.card-icon{font-size:56px;margin-bottom:20px;line-height:1}
.product-card h3{color:var(--primary-deep);font-size:20px;margin-bottom:12px}
.product-card p{color:var(--text-secondary);font-size:14px;line-height:1.6}

/* ================= Footer ================= */
.site-footer{background:var(--primary-deep);color:#fff;padding:60px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:50px;margin-bottom:40px}
.footer-grid h4{color:var(--accent);margin-bottom:15px;font-size:16px}
.footer-grid p{color:rgba(255,255,255,.8);font-size:14px;margin-bottom:8px}
.copyright{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(255,255,255,.6)}

/* ================= 内页通用 Banner ================= */
.page-banner{
    background:linear-gradient(135deg,var(--primary-deep) 0%,var(--primary) 100%);
    color:#fff;padding:80px 0;text-align:center;position:relative;overflow:hidden;
}
.page-banner::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(circle at 30% 50%,rgba(0,212,255,.25) 0%,transparent 50%);
}
.page-banner h1{font-size:42px;margin-bottom:15px;position:relative;z-index:1}
.page-banner p{font-size:17px;opacity:.92;max-width:760px;margin:0 auto;position:relative;z-index:1}

/* ================= 产品详情页 ================= */
.product-detail{padding:80px 0;background:#fff}
.product-intro{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:start}
.product-intro img{
    width:100%;height:auto;border-radius:12px;
    object-fit:contain;
    box-shadow:0 10px 30px rgba(22,93,255,.1);
}
.product-intro h2{color:var(--primary-deep);font-size:30px;margin-bottom:18px}
.product-intro h3{color:var(--primary);font-size:20px;margin:28px 0 14px}
.product-intro p{color:var(--text-secondary);margin-bottom:14px;line-height:1.8}
.product-intro ul{list-style:none;padding:0}
.product-intro ul li{
    padding:10px 0 10px 28px;position:relative;color:var(--text-secondary);
    border-bottom:1px dashed var(--border-light);
}
.product-intro ul li::before{
    content:'✓';position:absolute;left:0;top:10px;
    color:var(--accent);font-weight:700;font-size:16px;
}

/* ================= 解决方案页 ================= */
.solutions-section{padding:80px 0;background:var(--bg-light)}
.solution-list{display:grid;gap:30px}
.solution-item{
    background:#fff;border-radius:12px;padding:35px;
    display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:flex-start;
    transition:.3s;border-left:4px solid transparent;
}
.solution-item:hover{
    transform:translateX(6px);
    box-shadow:0 12px 30px rgba(22,93,255,.12);
    border-left-color:var(--accent);
}
.solution-icon{font-size:60px;line-height:1;padding-top:6px}

.solution-content h3{
    color:var(--primary-deep);font-size:22px;margin-bottom:10px;
    display:inline-flex;align-items:center;gap:12px;flex-wrap:wrap;
}
.solution-content .tag{
    display:inline-block;padding:4px 12px;
    background:rgba(22,93,255,.08);color:var(--primary);
    border-radius:20px;font-size:12px;font-weight:500;
}
.solution-desc{color:var(--text-secondary);line-height:1.8;margin-bottom:8px}

/* 痛点 / 价值 */
.solution-pains,.solution-values{
    margin-top:20px;padding-top:16px;
    border-top:1px dashed var(--border-light);
}
.solution-pains h4,.solution-values h4{
    font-size:15px;color:var(--primary);
    margin:0 0 12px;font-weight:600;
    display:flex;align-items:center;gap:6px;
}
.solution-pains ul{margin:0;padding-left:0;list-style:none}
.solution-pains li{
    font-size:14px;color:var(--text-secondary);line-height:1.8;
    padding:4px 0 4px 24px;position:relative;
}
.solution-pains li::before{
    content:'!';position:absolute;left:0;top:6px;
    width:16px;height:16px;border-radius:50%;
    background:#ffe4e4;color:#e74c3c;
    font-size:11px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
}

.value-grid{display:flex;flex-wrap:wrap;gap:10px}
.value-item{
    display:inline-block;padding:6px 14px;
    background:linear-gradient(135deg,#e0edff 0%,#f0f6ff 100%);
    color:var(--primary);border-radius:20px;
    font-size:13px;font-weight:500;
}

/* ================= 联系我们 ================= */
.contact-section{padding:80px 0;background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:60px}
.contact-info h2{
    color:var(--primary-deep);font-size:28px;margin-bottom:30px;
    padding-bottom:14px;border-bottom:2px solid var(--accent);display:inline-block;
}
.info-item{display:flex;gap:18px;margin-bottom:26px;align-items:flex-start}
.info-icon{
    font-size:24px;width:50px;height:50px;
    background:linear-gradient(135deg,var(--primary),var(--accent));
    border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.info-item h4{color:var(--text-dark);margin-bottom:5px;font-size:15px}
.info-item p{color:var(--text-secondary);line-height:1.6}

.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:8px;color:var(--text-dark);font-weight:500;font-size:14px}
.form-group input,.form-group textarea{
    width:100%;padding:12px 16px;
    border:1px solid #d8dce5;border-radius:6px;
    font-size:14px;font-family:inherit;transition:.2s;background:var(--bg-light);
}
.form-group input:focus,.form-group textarea:focus{
    outline:none;border-color:var(--primary);background:#fff;
    box-shadow:0 0 0 3px rgba(22,93,255,.1);
}
.alert{padding:14px 18px;border-radius:6px;margin-bottom:20px;font-size:14px}
.alert-success{background:#e6ffed;color:#0a7a30;border:1px solid #95e0a8}
.alert-error{background:#fff1f0;color:#cf1322;border:1px solid #ffa39e}

/* ================= 联系表单 ================= */
.contact-form-wrap{
    background:#fff;border-radius:14px;padding:36px 34px;
    box-shadow:0 6px 28px rgba(11,31,77,.08);
}
.form-title{
    font-size:24px;font-weight:700;color:var(--primary-deep);
    margin:0 0 6px;padding-bottom:14px;
    border-bottom:3px solid var(--accent);display:inline-block;
}
.hp-field{
    position:absolute !important;left:-9999px !important;top:-9999px !important;
    width:1px;height:1px;overflow:hidden;opacity:0;
}
.form-row{margin-bottom:20px;display:flex;flex-direction:column}
.form-row label{font-size:14px;color:#333;margin-bottom:8px;font-weight:500}
.form-row .req{color:#e74c3c;margin-left:2px}
.form-row input,.form-row textarea{
    width:100%;padding:12px 14px;font-size:15px;font-family:inherit;
    border:1.5px solid #e1e5ee;border-radius:8px;background:#fafbfd;
    transition:.25s;outline:none;box-sizing:border-box;
}
.form-row input:focus,.form-row textarea:focus{
    border-color:var(--primary);background:#fff;
    box-shadow:0 0 0 4px rgba(22,93,255,.12);
}
.form-row textarea{resize:vertical;min-height:130px;line-height:1.6}

.btn-submit{
    position:relative;display:inline-flex;align-items:center;justify-content:center;gap:10px;
    min-width:200px;height:48px;padding:0 36px;
    font-size:15px;font-weight:600;letter-spacing:1px;color:#fff;
    background:linear-gradient(135deg,var(--primary) 0%,var(--primary-deep) 100%);
    border:none;border-radius:26px;cursor:pointer;
    box-shadow:0 6px 18px rgba(22,93,255,.35);transition:.3s;overflow:hidden;
}
.btn-submit::before{
    content:'';position:absolute;inset:0;
    background:linear-gradient(135deg,var(--accent) 0%,var(--primary) 100%);
    opacity:0;transition:.3s;z-index:0;
}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(22,93,255,.5)}
.btn-submit:hover::before{opacity:1}
.btn-submit:active{transform:translateY(0)}
.btn-submit:disabled{opacity:.7;cursor:not-allowed;transform:none}
.btn-submit .btn-text,.btn-submit .btn-loading{position:relative;z-index:1;display:inline-flex;align-items:center}
.btn-submit .btn-loading{display:none}
.btn-submit .btn-loading svg{animation:spin 1s linear infinite}
.btn-submit.is-loading .btn-text{display:none}
.btn-submit.is-loading .btn-loading{display:inline-flex}
@keyframes spin{to{transform:rotate(360deg)}}

.cf-toast{
    margin-top:18px;padding:0 16px;
    font-size:14.5px;font-weight:500;border-radius:8px;
    max-height:0;overflow:hidden;transition:all .35s ease;opacity:0;
    display:flex;align-items:center;
}
.cf-toast.show{padding:14px 16px;max-height:120px;opacity:1;box-shadow:0 4px 14px rgba(0,0,0,.08)}
.cf-toast.ok{background:linear-gradient(135deg,#e8f8f0 0%,#d4f1de 100%);color:#1e7e4e;border:1px solid #a6dcbb}
.cf-toast.err{background:linear-gradient(135deg,#fdecec 0%,#fad7d3 100%);color:#c0392b;border:1px solid #f0a8a0}

.field-error{
    display:block;min-height:18px;margin-top:6px;
    font-size:12.5px;color:#e74c3c;line-height:1.4;
    opacity:0;transform:translateY(-3px);transition:.25s;
}
.field-error.show{opacity:1;transform:translateY(0)}
.form-row.has-error input,.form-row.has-error textarea{border-color:#e74c3c;background:#fff5f5}
.form-row.has-error input:focus,.form-row.has-error textarea:focus{box-shadow:0 0 0 4px rgba(231,76,60,.12)}
.form-row.is-valid input,.form-row.is-valid textarea{border-color:#27ae60}

/* ================= 产品总览页 ================= */
.product-section{padding:80px 0;background:var(--bg-light)}
.product-section .product-card{text-decoration:none;color:inherit}
.product-section .pc-image{width:auto;height:auto;background:transparent;margin-bottom:20px}
.product-section .pc-image img{width:80px;height:80px;border-radius:50%;object-fit:cover}
.product-section .pc-icon-fallback{
    width:auto;height:auto;background:transparent;
    font-size:56px;line-height:1;
}
.product-section .pc-body{padding:0;gap:0;align-items:center;display:flex;flex-direction:column}
.product-section .pc-title{color:var(--primary-deep);font-size:20px;font-weight:700;margin:0 0 12px}
.product-section .pc-desc{
    color:var(--text-secondary);font-size:14px;line-height:1.6;margin:0;
    -webkit-line-clamp:unset;display:block;overflow:visible;
}
.product-section .pc-more{
    margin-top:14px;font-size:13px;font-weight:600;color:var(--primary);
    opacity:0;transform:translateY(4px);transition:.25s;
}
.product-section .product-card:hover .pc-more{opacity:1;transform:translateY(0)}

/* ================= 响应式 ================= */
@media(max-width:1100px){
    .product-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    /* 导航：切换成汉堡菜单 */
    .nav-toggle{display:flex}
    .main-nav{
        position:absolute;top:70px;left:0;right:0;
        background:#fff;flex-direction:column;
        padding:20px;gap:16px;display:none;
        box-shadow:0 6px 20px rgba(0,0,0,.08);
    }
    .main-nav.open{display:flex}
    .main-nav a{margin:0}

    .hero-slider{height:70vh;min-height:480px}
    .hero-title{font-size:32px}
    .hero-subtitle{font-size:15px}
    .hero-actions{flex-direction:column;width:100%}
    .hero-actions .btn{width:100%;text-align:center}
    .hero-arrow{width:40px;height:40px;font-size:24px}
    .hero-arrow.prev{left:12px}
    .hero-arrow.next{right:12px}
    .hero-indicators{bottom:20px}
    .indicator{width:24px}
    .indicator.active{width:36px}

    .product-grid{grid-template-columns:1fr}

    .page-banner{padding:50px 0}
    .page-banner h1{font-size:28px}
    .product-intro,.contact-grid{grid-template-columns:1fr;gap:30px}
    .solution-item{grid-template-columns:1fr;text-align:left;padding:25px}
    .solution-icon{text-align:center}
    .product-detail,.solutions-section,.contact-section{padding:50px 0}

    .footer-grid{grid-template-columns:1fr}
    .contact-form-wrap{padding:24px 20px}
    .btn-submit{width:100%}
}