/* ============================================================
   辽阳金鼎低温设备有限公司 - 主样式
   设计基调：工业深蓝 + 深灰 + 白色，专业稳重、科技感
   ============================================================ */
:root {
    --primary: #334155;        /* 深石板灰 */
    --primary-light: #64748b;
    --accent: #94a3b8;         /* 银灰 */
    --accent-gold: #cbd5e1;    /* 浅银灰点缀 */
    --dark: #1e293b;
    --gray: #64748b;
    --light-bg: #fafafa;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 24px rgba(51, 65, 85, 0.08);
    --shadow-hover: 0 16px 40px rgba(51, 65, 85, 0.16);
    --radius: 8px;
    --container: 1280px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.7;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .25s; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ 顶部信息条 ============ */
.topbar {
    background: #1e293b;
    color: #8a9aaa;
    font-size: 13px;
    padding: 8px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar a { color: #b8c4d0; }
.topbar a:hover { color: #fff; }
.topbar .bar-right { display: flex; gap: 24px; }
.topbar .bar-right span { display: inline-flex; align-items: center; gap: 6px; }

/* ============ 主导航 ============ */
.header {
    background: var(--white);
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
    position: sticky; top: 0; z-index: 100;
}
.header .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 84px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo .logo-mark {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 20px;
}
.logo .logo-text { line-height: 1.2; }
.logo .logo-text .cn { font-size: 20px; font-weight: 700; color: var(--primary); letter-spacing: 1px; }
.logo .logo-text .en { font-size: 11px; color: var(--gray); letter-spacing: .5px; }

.nav { display: flex; align-items: center; }
.nav > ul { display: flex; list-style: none; }
.nav > ul > li { position: relative; }
.nav > ul > li > a {
    display: block; padding: 0 22px; line-height: 84px;
    font-size: 16px; color: var(--dark); font-weight: 500;
    position: relative;
}
.nav > ul > li > a::after {
    content: ''; position: absolute; left: 50%; bottom: 0;
    width: 0; height: 3px; background: var(--accent);
    transition: all .3s; transform: translateX(-50%);
}
.nav > ul > li:hover > a, .nav > ul > li.active > a { color: var(--primary); }
.nav > ul > li:hover > a::after, .nav > ul > li.active > a::after { width: 60%; }

/* 下拉菜单 */
.nav .dropdown {
    position: absolute; top: 84px; left: 50%; transform: translateX(-50%) translateY(10px);
    background: var(--white); min-width: 180px;
    box-shadow: var(--shadow-hover); border-radius: 0 0 var(--radius) var(--radius);
    opacity: 0; visibility: hidden; transition: all .3s;
    list-style: none; padding: 8px 0;
}
.nav > ul > li:hover .dropdown {
    opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.nav .dropdown li a {
    display: block; padding: 10px 20px; font-size: 14px; color: var(--gray);
    white-space: nowrap;
}
.nav .dropdown li a:hover { background: var(--light-bg); color: var(--primary); padding-left: 26px; }

.nav-cta {
    margin-left: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff !important; padding: 10px 22px !important;
    border-radius: 30px; line-height: 1.4 !important; font-size: 14px;
}
.nav-cta::after { display: none !important; }

/* 移动端菜单按钮 */
.menu-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--primary); }

/* ============ 首页 Banner ============ */
.hero {
    position: relative; height: 680px; overflow: hidden;
    background: linear-gradient(135deg, #0a2a4a 0%, #0d3b66 50%, #1a5f9e 100%);
    color: #fff;
}
.hero-slide {
    position: absolute; inset: 0;
    display: flex; align-items: center;
    opacity: 0; transition: opacity 1s;
}
.hero-slide.active { opacity: 1; }
.hero-slide .container { position: relative; z-index: 2; }
.hero-slide h1 {
    font-size: 48px; font-weight: 700; margin-bottom: 20px;
    line-height: 1.3; letter-spacing: 2px;
}
.hero-slide h1 .hl { color: var(--accent-gold); }
.hero-slide p.subtitle {
    font-size: 18px; color: rgba(255,255,255,.85); margin-bottom: 36px;
    max-width: 640px;
}
.hero-actions { display: flex; gap: 16px; }
.btn {
    display: inline-block; padding: 13px 36px; border-radius: 30px;
    font-size: 15px; font-weight: 500; transition: all .3s; cursor: pointer;
    border: 2px solid transparent;
}
.btn-primary { background: var(--accent-gold); color: var(--dark); }
.btn-primary:hover { background: #d4b364; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(201,162,75,.4); }
.btn-outline { border-color: rgba(255,255,255,.6); color: #fff; }
.btn-outline:hover { background: #fff; color: var(--primary); }

/* 背景装饰 */
.hero::before {
    content: ''; position: absolute; right: -100px; top: -100px;
    width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(46,134,193,.25), transparent 70%);
}
.hero::after {
    content: ''; position: absolute; left: 10%; bottom: -200px;
    width: 500px; height: 500px; border-radius: 50%;
    background: radial-gradient(circle, rgba(201,162,75,.12), transparent 70%);
}
.hero-dots {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 3;
}
.hero-dots span {
    width: 10px; height: 10px; border-radius: 50%;
    background: rgba(255,255,255,.4); cursor: pointer; transition: all .3s;
}
.hero-dots span.active { background: var(--accent-gold); width: 28px; border-radius: 6px; }

/* ============ 通用区块 ============ */
.section { padding: 90px 0; }
.section-alt { background: var(--light-bg); }
.section-head { text-align: center; margin-bottom: 60px; }
.section-head .en-title {
    font-size: 13px; color: var(--accent); letter-spacing: 5px;
    text-transform: uppercase; margin-bottom: 12px; font-weight: 600;
}
.section-head h2 {
    font-size: 36px; color: var(--primary); font-weight: 700;
    position: relative; display: inline-block; padding-bottom: 20px;
    letter-spacing: 1px;
}
.section-head h2::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 60px; height: 3px; background: var(--accent-gold);
}
.section-head .desc { color: var(--gray); margin-top: 16px; font-size: 15px; }

/* ============ 核心优势条 ============ */
.features-bar {
    background: var(--white); box-shadow: var(--shadow);
    margin-top: -50px; position: relative; z-index: 5;
    border-radius: var(--radius);
}
.features-bar .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.feature-item {
    padding: 30px 24px; text-align: center; border-right: 1px solid var(--border);
}
.feature-item:last-child { border-right: none; }
.feature-item .num { font-size: 32px; font-weight: 700; color: var(--primary); }
.feature-item .num small { font-size: 14px; color: var(--gray); font-weight: 400; }
.feature-item .label { color: var(--gray); font-size: 14px; margin-top: 6px; }

/* ============ 产品网格 ============ */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-card {
    background: var(--white); border-radius: 10px; overflow: hidden;
    box-shadow: 0 2px 16px rgba(13, 59, 102, 0.07); transition: all .4s;
    border: 1px solid rgba(226,232,240,.6);
}
.product-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(13, 59, 102, 0.15); }
.product-card .pc-img {
    height: 230px; background: linear-gradient(135deg, #dce6f0, #b8cfe0);
    display: flex; align-items: center; justify-content: center;
    font-size: 60px; color: var(--primary); position: relative; overflow: hidden;
}
.product-card .pc-img img { width: 100%; height: 100%; object-fit: cover; }
.product-card .pc-body { padding: 26px; }
.product-card .pc-body h3 { font-size: 19px; color: var(--dark); margin-bottom: 10px; font-weight: 600; }
.product-card .pc-body p { color: var(--gray); font-size: 14px; margin-bottom: 16px; line-height: 1.7; }
.product-card .pc-link { color: var(--accent); font-size: 14px; font-weight: 500; }
.product-card .pc-link::after { content: ' →'; }

/* ============ 新闻列表 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
    background: var(--white); border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow); transition: all .3s;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.news-card .nc-img {
    height: 180px; background: linear-gradient(135deg, #cdddee, #a8c4dc);
    display: flex; align-items: center; justify-content: center; font-size: 40px; color: var(--primary);
}
.news-card .nc-img img { width: 100%; height: 100%; object-fit: cover; }
.news-card .nc-body { padding: 20px 22px; }
.news-card .nc-date { font-size: 13px; color: var(--accent); margin-bottom: 8px; }
.news-card .nc-body h3 {
    font-size: 16px; color: var(--dark); margin-bottom: 8px;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.news-card .nc-body p { font-size: 13px; color: var(--gray); }

/* ============ 关于我们区块 ============ */
.about-block { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-block .ab-img {
    height: 400px; border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,.9); font-size: 60px;
}
.about-block .ab-text h3 { font-size: 28px; color: var(--primary); margin-bottom: 20px; }
.about-block .ab-text p { color: var(--gray); margin-bottom: 16px; }
.about-block .ab-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 28px; }
.about-block .ab-tags span {
    background: var(--light-bg); color: var(--primary);
    padding: 6px 16px; border-radius: 20px; font-size: 13px;
}

/* ============ 案例 ============ */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
    height: 240px; border-radius: var(--radius); overflow: hidden;
    position: relative; cursor: pointer;
    background: linear-gradient(135deg, #1a3a5c, #0d3b66);
    display: flex; align-items: flex-end;
    transition: all .3s;
}
.case-card:hover { transform: scale(1.02); }
.case-card .cc-info { padding: 24px; color: #fff; position: relative; z-index: 2; width: 100%; }
.case-card .cc-info .industry { font-size: 12px; color: var(--accent-gold); margin-bottom: 6px; }
.case-card .cc-info h4 { font-size: 18px; }
.case-card::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,.6), transparent 60%);
}

/* ============ CTA 区块 ============ */
.cta-block {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; padding: 60px 0; text-align: center;
}
.cta-block h2 { font-size: 30px; margin-bottom: 12px; }
.cta-block p { color: rgba(255,255,255,.85); margin-bottom: 28px; }
.cta-block .btn-primary { background: var(--accent-gold); }

/* ============ 页脚 ============ */
.footer {
    background: var(--dark); color: #8a9aaa; padding: 60px 0 0; font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer h4::after {
    content: ''; position: absolute; left: 0; bottom: 0;
    width: 30px; height: 2px; background: var(--accent);
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: #8a9aaa; }
.footer ul li a:hover { color: #fff; }
.footer .contact-line { display: flex; gap: 10px; margin-bottom: 12px; }
.footer .contact-line .ico { color: var(--accent); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; text-align: center;
    font-size: 13px; color: #6a7a8a;
}

/* ============ 内页 Banner（页面头图） ============ */
.page-banner {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; padding: 60px 0; text-align: center;
}
.page-banner h1 { font-size: 36px; margin-bottom: 10px; letter-spacing: 2px; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,.7); }
.breadcrumb a { color: rgba(255,255,255,.85); }

/* ============ 列表页 ============ */
.list-layout { display: grid; grid-template-columns: 220px 1fr; gap: 40px; padding: 60px 0; }
.sidebar .side-title {
    background: var(--primary); color: #fff; padding: 14px 20px;
    font-size: 16px; border-radius: var(--radius) var(--radius) 0 0;
}
.sidebar ul { list-style: none; background: var(--white); border: 1px solid var(--border); }
.sidebar ul li a {
    display: block; padding: 13px 20px; border-bottom: 1px solid var(--border);
    color: var(--dark); font-size: 14px; transition: all .2s;
}
.sidebar ul li a:hover, .sidebar ul li a.active {
    background: var(--light-bg); color: var(--primary); padding-left: 26px;
    border-left: 3px solid var(--accent);
}

.news-list-item {
    display: flex; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--border);
}
.news-list-item .nli-img {
    width: 200px; height: 130px; flex-shrink: 0; border-radius: var(--radius);
    background: linear-gradient(135deg, #cdddee, #a8c4dc);
    display: flex; align-items: center; justify-content: center; color: var(--primary);
}
.news-list-item .nli-img img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.news-list-item .nli-body h3 { font-size: 18px; margin-bottom: 8px; }
.news-list-item .nli-body .date { color: var(--accent); font-size: 13px; margin-bottom: 8px; }
.news-list-item .nli-body p { color: var(--gray); font-size: 14px; }

/* 分页 */
.pagination { margin-top: 30px; text-align: center; }
.pagination a, .pagination span {
    display: inline-block; padding: 8px 15px; margin: 0 3px;
    border: 1px solid var(--border); border-radius: 4px; color: var(--dark);
}
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============ 详情页 ============ */
.detail-layout { padding: 60px 0; }
.detail-title { text-align: center; margin-bottom: 30px; }
.detail-title h1 { font-size: 28px; color: var(--primary); margin-bottom: 10px; }
.detail-title .meta { color: var(--gray); font-size: 13px; }
.detail-content { font-size: 15px; line-height: 1.9; color: var(--dark); }
.detail-content img { border-radius: var(--radius); margin: 16px 0; }
.detail-content p { margin-bottom: 14px; }

/* 技术参数表 */
.params-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.params-table th, .params-table td {
    border: 1px solid var(--border); padding: 10px 16px; text-align: left; font-size: 14px;
}
.params-table th { background: var(--light-bg); color: var(--primary); width: 30%; }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 60px 0; }
.contact-info-box { background: var(--light-bg); padding: 30px; border-radius: var(--radius); }
.contact-info-box h3 { color: var(--primary); margin-bottom: 20px; }
.contact-info-box .row { display: flex; gap: 12px; margin-bottom: 16px; align-items: flex-start; }
.contact-info-box .row .ico { color: var(--accent); font-size: 18px; margin-top: 2px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--dark); font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 11px 14px; border: 1px solid var(--border);
    border-radius: var(--radius); font-size: 14px; font-family: inherit;
    transition: border .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-group textarea { min-height: 120px; resize: vertical; }

/* ============ 下载页 ============ */
.download-item {
    display: flex; justify-content: space-between; align-items: center;
    background: var(--white); border: 1px solid var(--border);
    padding: 20px 24px; border-radius: var(--radius); margin-bottom: 14px;
    transition: all .2s;
}
.download-item:hover { box-shadow: var(--shadow); border-color: var(--accent); }
.download-item .dl-info h4 { font-size: 16px; margin-bottom: 4px; }
.download-item .dl-info p { font-size: 13px; color: var(--gray); }

/* ============ 后台样式 ============ */
.admin-body { background: #f0f2f5; font-size: 14px; }
.admin-wrap { display: flex; min-height: 100vh; }
.admin-side {
    width: 220px; background: var(--dark); color: #fff; flex-shrink: 0;
}
.admin-side .admin-logo {
    padding: 20px; font-size: 18px; font-weight: 700;
    border-bottom: 1px solid rgba(255,255,255,.1); color: #fff;
}
.admin-side ul { list-style: none; padding: 10px 0; }
.admin-side ul li a {
    display: block; padding: 12px 20px; color: #b8c4d0;
}
.admin-side ul li a:hover, .admin-side ul li a.active {
    background: var(--primary); color: #fff; border-left: 3px solid var(--accent-gold);
}
.admin-main { flex: 1; padding: 0; }
.admin-top {
    background: #fff; padding: 0 24px; height: 60px;
    display: flex; align-items: center; justify-content: space-between;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.admin-content { padding: 24px; }
.admin-card {
    background: #fff; border-radius: 8px; padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,.05); margin-bottom: 20px;
}
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td {
    padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left;
}
.admin-table th { background: var(--light-bg); font-weight: 600; color: var(--primary); }
.admin-table tr:hover { background: #fafbfc; }
.btn-admin {
    display: inline-block; padding: 6px 16px; border-radius: 4px;
    background: var(--primary); color: #fff; font-size: 13px; border: none; cursor: pointer;
}
.btn-admin:hover { background: var(--primary-light); }
.btn-danger { background: #c0392b; }
.btn-danger:hover { background: #e74c3c; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.stat-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 20px; }
.stat-box { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,.05); }
.stat-box .n { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-box .l { color: var(--gray); font-size: 13px; }

/* 登录页 */
.login-body {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
}
.login-box {
    background: #fff; padding: 40px; border-radius: 10px;
    width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.login-box h2 { text-align: center; color: var(--primary); margin-bottom: 24px; }

/* ============ 玻璃拟态增强 ============ */
.topbar {
    background: rgba(26, 35, 50, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

/* 导航链接高亮 */
.nav > ul > li > a {
    transition: all .25s ease;
    border-radius: 6px;
}
.nav > ul > li > a:hover {
    color: var(--accent);
    background: rgba(46, 134, 193, 0.08);
}
.nav > ul > li.active > a {
    color: var(--primary);
    background: rgba(13, 59, 102, 0.06);
}

/* 下拉菜单玻璃效果 */
.nav .dropdown {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(226, 232, 240, 0.5);
    border-radius: 0 0 10px 10px;
}
.nav .dropdown li a {
    transition: all .2s;
    border-radius: 0;
}
.nav .dropdown li a:hover {
    background: rgba(46, 134, 193, 0.1);
    color: var(--accent);
}

/* 产品卡片玻璃 */
.product-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 24px rgba(13, 59, 102, 0.08);
}
.product-card:hover {
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 16px 40px rgba(13, 59, 102, 0.16);
}

/* 新闻卡片玻璃 */
.news-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.6);
}
.news-card:hover {
    background: rgba(255, 255, 255, 0.92);
}

/* 通用链接高亮 */
a {
    position: relative;
    transition: color .25s ease;
}

/* 页脚链接高亮 */
.footer a {
    transition: all .25s;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: -6px;
}
.footer a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

/* 按钮玻璃感 */
.btn-outline {
    backdrop-filter: blur(4px);
}

/* 内页 Banner 玻璃蒙版 */
.page-banner {
    position: relative;
}
.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,59,102,.85), rgba(26,95,158,.75));
    z-index: 0;
}
.page-banner .container { position: relative; z-index: 1; }

/* 回到顶部玻璃 */
#back-top {
    background: rgba(13, 59, 102, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* ============ 动画效果 ============ */

/* 页面预加载器 */
#page-loader {
    position: fixed; inset: 0; z-index: 9999;
    background: linear-gradient(135deg, #0a2a4a, #0d3b66);
    display: flex; align-items: center; justify-content: center;
    transition: opacity .5s, visibility .5s;
}
#page-loader.loader-hidden { opacity: 0; visibility: hidden; }
.loader-inner { text-align: center; }
.loader-ring {
    width: 60px; height: 60px; margin: 0 auto 16px;
    border: 3px solid rgba(255,255,255,.15);
    border-top-color: #c9a24b;
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
.loader-text { color: rgba(255,255,255,.8); font-size: 14px; letter-spacing: 4px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 滚动渐入 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* 导航滚动后阴影 */
.header.scrolled { box-shadow: 0 4px 20px rgba(51,65,85,.12); }

/* 回到顶部 */
#back-top {
    position: fixed; right: 30px; bottom: 30px; z-index: 99;
    width: 44px; height: 44px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; font-size: 20px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 16px rgba(13,59,102,.3);
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: all .3s;
}
#back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
#back-top:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(13,59,102,.4); }

/* Hero 标题入场 */
.hero-slide.active h1 { animation: heroUp .8s ease-out; }
.hero-slide.active p.subtitle { animation: heroUp .8s ease-out .2s both; }
.hero-slide.active .hero-actions { animation: heroUp .8s ease-out .4s both; }
@keyframes heroUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 产品卡片增强悬浮 */
.product-card { transition: transform .4s cubic-bezier(.22,.61,.36,1), box-shadow .4s; }
.product-card .pc-img { transition: transform .5s; overflow: hidden; position: relative; }
.product-card:hover .pc-img { transform: scale(1.05); }
.product-card .pc-img img { transition: transform .6s; }
.product-card:hover .pc-img img { transform: scale(1.08); }
.product-card .pc-img > div[style*="gradient"] {
    transition: opacity .3s; opacity: 0; position: absolute !important; inset: 0 !important;
    background: rgba(51,65,85,.45) !important; display: flex !important;
    align-items: center !important; justify-content: center !important; padding: 0 !important;
}
.product-card:hover .pc-img > div[style*="gradient"] { opacity: 1; }
.product-card .pc-img > div[style*="gradient"] a {
    font-size: 16px !important; font-weight: 600 !important; color: #fff !important;
    text-decoration: none !important; letter-spacing: 1px;
    transition: all .3s; transform: translateY(10px); display: inline-block;
}
.product-card:hover .pc-img > div[style*="gradient"] a { transform: translateY(0); }
.product-card .pc-img > div[style*="gradient"] a:hover { color: #e8821e !important; }

/* 案例卡片悬浮光效 */
.case-card::before {
    content: ''; position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(135deg, rgba(201,162,75,0), rgba(201,162,75,.15));
    opacity: 0; transition: opacity .4s;
}
.case-card:hover::before { opacity: 1; }
.case-card:hover { box-shadow: 0 12px 36px rgba(13,59,102,.3); }

/* 新闻卡片 */
.news-card .nc-img { transition: transform .4s; }
.news-card:hover .nc-img { transform: scale(1.03); }

/* 按钮微交互 */
.btn { position: relative; overflow: hidden; }
.btn::after {
    content: ''; position: absolute; top: 50%; left: 50%;
    width: 0; height: 0; border-radius: 50%;
    background: rgba(255,255,255,.3);
    transform: translate(-50%, -50%);
    transition: width .5s, height .5s;
}
.btn:hover::after { width: 300px; height: 300px; }

/* 链接下划线动画 */
.nav > ul > li > a { transition: color .25s; }

/* 表单聚焦动画 */
.form-group input, .form-group textarea { transition: border-color .25s, box-shadow .25s; }
.form-group input:focus, .form-group textarea:focus {
    box-shadow: 0 0 0 3px rgba(46,134,193,.12);
}

/* 下载项滑入 */
.download-item { transition: transform .25s, box-shadow .25s; }
.download-item:hover { transform: translateX(6px); }

/* 通用平滑滚动 */
html { scroll-behavior: smooth; }

/* ============ 响应式 ============ */
@media (max-width: 968px) {
    .nav { display: none; }
    .menu-toggle { display: block; }
    .nav.mobile-open { display: block; position: absolute; top: 84px; left: 0; right: 0; background: #fff; box-shadow: var(--shadow-hover); }
    .nav.mobile-open ul { flex-direction: column; }
    .nav.mobile-open ul > li > a { line-height: 50px; }
    .nav.mobile-open .dropdown { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; }
    .hero { height: 60vh; min-height: 400px; }
    .hero-slide h1 { font-size: 26px; }
    .hero-slide p { font-size: 14px; }
    .features-bar .container { grid-template-columns: repeat(2,1fr); gap: 20px; }
    .product-grid, .news-grid, .case-grid { grid-template-columns: 1fr; gap: 20px; }
    .about-block, .contact-grid, .list-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .topbar .bar-left { display: none; }
    .news-list-item { flex-direction: column; }
    .news-list-item .nli-img { width: 100%; height: 180px; }
    .stat-row { grid-template-columns: repeat(2,1fr); }
    .section { padding: 50px 0 !important; }
    .container { padding: 0 16px; }
    .section-head h2 { font-size: 24px; }
}

@media (max-width: 640px) {
    .hero { height: 50vh; min-height: 320px; }
    .hero-slide h1 { font-size: 22px; }
    .features-bar .item .num { font-size: 24px; }
    .features-bar .item .label { font-size: 12px; }
    .section { padding: 40px 0 !important; }
    .section-head h2 { font-size: 22px; }
    .section-head { margin-bottom: 24px; }
    .btn { padding: 10px 24px; font-size: 14px; }
    .inner-banner { padding: 60px 0; }
    .inner-banner h1 { font-size: 24px; }
    .contact-dept { flex-direction: column; align-items: flex-start; gap: 12px; }
    .qr-box { width: 100%; max-width: 120px; }
}

/* 移动端：首页图文卡片改为上下排列 */
@media (max-width: 968px) {
    .hero { display: none !important; }
    section[style*="grid-template-columns:1fr 1fr"] > div[style*="grid-template-columns:1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
    section[style*="grid-template-columns:1fr 1.1fr"],
    section[style*="grid-template-columns:1.1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
    .footer > div { padding: 0 16px !important; }
    .history-card-img { min-height: 220px !important; }
}

/* 手机端底部导航 */
.mobile-bottom-bar { display: none; }
@media (max-width: 968px) {
    .mobile-bottom-bar {
        display: flex;
        position: fixed;
        bottom: 0; left: 0; right: 0;
        background: #fff;
        border-top: 1px solid #e5e9ef;
        z-index: 9999;
        padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
        box-shadow: 0 -2px 10px rgba(0,0,0,.06);
    }
    .mbb-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 3px;
        color: #64748b;
        text-decoration: none;
        font-size: 11px;
    }
    .mbb-item.mbb-call {
        color: #e8821e;
    }
    .mbb-item.mbb-call svg {
        background: #e8821e;
        color: #fff;
        border-radius: 50%;
        padding: 8px;
        width: 40px; height: 40px;
        margin-top: -24px;
        box-shadow: 0 4px 12px rgba(232,130,30,.4);
    }
    body { padding-bottom: 60px; }
}