:root {
    --navy: #0b1e36;
    --navy2: #102a4a;
    --blue: #2563eb;
    --blue-light: #3b82f6;
    --accent: #60a5fa;
    --gray-50: #f6f8fb;
    --gray-100: #eef2f7;
    --gray-200: #dde3ec;
    --gray-500: #6b7a90;
    --gray-700: #3d4d63;
    --text: #1e293b;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif; color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
img { max-width: 100%; display: block; }

/* 顶栏 */
.topbar { background: var(--navy); color: rgba(255,255,255,0.7); font-size: 13px; padding: 8px 0; }
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; }
.topbar span { margin-right: 24px; }

/* 导航 */
header { background: #fff; box-shadow: 0 1px 0 var(--gray-200); position: sticky; top: 0; z-index: 100; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { width: 44px; height: 44px; background: linear-gradient(135deg, var(--navy), var(--blue)); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 22px; font-weight: bold; }
.brand-name { font-size: 21px; font-weight: 700; color: var(--navy); letter-spacing: 1px; }
.brand-name em { font-style: normal; color: var(--blue); }
.brand-sub { font-size: 11px; color: var(--gray-500); letter-spacing: 3px; text-transform: uppercase; }
nav ul { list-style: none; display: flex; gap: 40px; }
nav a { font-size: 15px; color: var(--gray-700); font-weight: 500; transition: color .25s; position: relative; padding: 8px 0; }
nav a:hover, nav a.active { color: var(--blue); }
nav a::after { content:''; position:absolute; bottom:0; left:50%; width:0; height:2px; background:var(--blue); transition:all .3s; transform:translateX(-50%); }
nav a:hover::after, nav a.active::after { width: 28px; }

/* 首屏 */
.hero { position: relative; height: 560px; overflow: hidden; display: flex; align-items: center; color: #fff; }
.hero-bg { position:absolute; inset:0; background: url('/images/hero-bg.jpg') center/cover no-repeat; transform: scale(1.05); animation: heroZoom 20s ease-in-out infinite alternate; }
@keyframes heroZoom { to { transform: scale(1.12); } }
.hero-mask { position:absolute; inset:0; background: linear-gradient(90deg, rgba(8,20,40,0.92) 0%, rgba(8,20,40,0.7) 45%, rgba(8,20,40,0.3) 100%); }
.hero-inner { position:relative; z-index:2; max-width: 560px; }
.hero-en { font-size: 13px; letter-spacing: 6px; color: var(--accent); text-transform: uppercase; margin-bottom: 22px; font-weight: 500; }
.hero h1 { font-size: 46px; font-weight: 700; line-height: 1.25; margin-bottom: 20px; letter-spacing: 3px; }
.hero-slogan { font-size: 19px; color: rgba(255,255,255,0.9); margin-bottom: 22px; letter-spacing: 2px; font-weight: 300; }
.hero-slogan span { color: var(--accent); }
.hero-desc { font-size: 15px; color: rgba(255,255,255,0.65); line-height: 1.9; margin-bottom: 34px; }
.hero-points { display: flex; gap: 28px; margin-bottom: 38px; }
.hero-point { font-size: 14px; color: rgba(255,255,255,0.8); display: flex; align-items: center; gap: 8px; }
.hero-point::before { content:''; width:6px; height:6px; background:var(--accent); border-radius:50%; }
.hero-actions { display: flex; gap: 16px; }
.btn { display:inline-flex; align-items:center; gap:8px; padding: 13px 38px; font-size: 14px; letter-spacing: 2px; border-radius: 2px; transition: all .3s; cursor: pointer; border: none; }
.btn-primary { background: var(--blue); color: #fff; font-weight: 500; }
.btn-primary:hover { background: var(--blue-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.4); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--blue); }

/* 页面横幅(内页) */
.page-banner { position: relative; height: 320px; background: linear-gradient(135deg, var(--navy), var(--navy2)); overflow: hidden; display: flex; align-items: center; justify-content: center; text-align: center; color: #fff; }
.page-banner::before { content:''; position:absolute; inset:0; background: url('/images/hero-bg.jpg') center/cover no-repeat; opacity: 0.25; }
.page-banner::after { content:''; position:absolute; inset:0; background: linear-gradient(180deg, rgba(8,20,40,0.7), rgba(8,20,40,0.85)); }
.page-banner-inner { position:relative; z-index:2; }
.page-banner h1 { font-size: 38px; letter-spacing: 4px; margin-bottom: 12px; }
.page-banner p { font-size: 15px; color: rgba(255,255,255,0.65); letter-spacing: 2px; }

/* 通用板块 */
.section { padding: 80px 0; }
.section.alt { background: var(--gray-50); }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-tag { font-size: 13px; color: var(--blue); letter-spacing: 4px; text-transform: uppercase; font-weight: 600; }
.sec-title { font-size: 32px; color: var(--navy); font-weight: 700; margin-top: 12px; letter-spacing: 2px; }
.sec-line { width: 56px; height: 3px; background: var(--blue); margin: 18px auto 0; }
.sec-desc { color: var(--gray-500); font-size: 15px; margin-top: 18px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* 产品卡片 */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.prod-card { background: #fff; border: 1px solid var(--gray-200); border-radius: 6px; padding: 30px 26px; transition: all .35s; position: relative; overflow: hidden; }
.prod-card::after { content:''; position:absolute; top:0; left:0; width:100%; height:3px; background:linear-gradient(90deg,var(--blue),var(--accent)); transform:scaleX(0); transform-origin:left; transition:transform .4s; }
.prod-card:hover { box-shadow: 0 16px 40px rgba(10,31,61,0.08); transform: translateY(-6px); border-color: transparent; }
.prod-card:hover::after { transform:scaleX(1); }
.prod-icon { width: 54px; height: 54px; background: linear-gradient(135deg, #f0f4fa, #e2eaf5); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--blue); font-weight: 700; margin-bottom: 20px; transition: all .35s; }
.prod-card:hover .prod-icon { background: linear-gradient(135deg, var(--navy), var(--blue)); color: #fff; }
.prod-card h3 { font-size: 18px; color: var(--navy); margin-bottom: 4px; font-weight: 600; }
.prod-cas { font-size: 12px; color: var(--gray-500); font-family: Consolas, monospace; margin-bottom: 12px; }
.prod-card p { font-size: 13.5px; color: var(--gray-500); line-height: 1.8; }

/* 优势 */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.adv-item { text-align: center; padding: 44px 28px; background: #fff; border-radius: 6px; border: 1px solid var(--gray-200); transition: all .35s; }
.adv-item:hover { border-color: var(--blue); box-shadow: 0 12px 36px rgba(37,99,235,0.1); transform: translateY(-4px); }
.adv-icon { width: 72px; height: 72px; margin: 0 auto 22px; border: 2px solid var(--blue); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; color: var(--blue); transition: all .35s; }
.adv-item:hover .adv-icon { background: var(--blue); color: #fff; }
.adv-item h3 { font-size: 18px; color: var(--navy); margin-bottom: 12px; font-weight: 600; }
.adv-item p { font-size: 14px; color: var(--gray-500); line-height: 1.8; }

/* 应用领域 */
.ind-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ind-item { position: relative; height: 180px; border-radius: 6px; overflow: hidden; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: transform .35s; background: linear-gradient(135deg, var(--navy), var(--blue)); }
.ind-item::after { content:''; position:absolute; inset:0; border: 2px solid transparent; border-radius: 6px; transition: border-color .35s; }
.ind-item:hover { transform: translateY(-5px); }
.ind-item:hover::after { border-color: rgba(255,255,255,0.5); }
.ind-inner { position: relative; z-index: 2; text-align: center; color: #fff; }
.ind-inner .ind-ico { font-size: 38px; margin-bottom: 10px; display: block; }
.ind-inner span { font-size: 19px; font-weight: 600; letter-spacing: 3px; }

/* 服务流程 */
.proc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.proc-item { text-align: center; position: relative; padding: 0 16px; }
.proc-num { width: 68px; height: 68px; margin: 0 auto 22px; background: #fff; border: 2px solid var(--blue); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 700; color: var(--blue); transition: all .35s; }
.proc-item:hover .proc-num { background: var(--blue); color: #fff; transform: scale(1.08); }
.proc-item h3 { font-size: 17px; color: var(--navy); margin-bottom: 10px; font-weight: 600; }
.proc-item p { font-size: 13px; color: var(--gray-500); line-height: 1.8; }

/* 关于 */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-img { border-radius: 6px; overflow: hidden; box-shadow: 0 20px 50px rgba(10,31,61,0.15); }
.about-img img { width: 100%; height: 420px; object-fit: cover; }
.about-text .sec-tag { text-align: left; }
.about-text .sec-title { text-align: left; margin-top: 10px; font-size: 30px; }
.about-text .sec-line { margin-left: 0; }
.about-text p { color: var(--gray-500); margin: 18px 0; font-size: 15px; line-height: 2; }
.about-list { list-style: none; margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.about-list li { font-size: 14px; color: var(--gray-700); display: flex; align-items: center; gap: 10px; }
.about-list li::before { content: '\2713'; color: var(--blue); font-weight: bold; font-size: 16px; }

/* CTA */
.cta { background: linear-gradient(135deg, var(--navy), var(--navy2)); color: #fff; text-align: center; padding: 70px 20px; position: relative; overflow: hidden; }
.cta::before { content:''; position:absolute; top:-50%; right:-10%; width:500px; height:500px; background:radial-gradient(circle, rgba(96,165,250,0.1), transparent 70%); }
.cta h2 { font-size: 32px; letter-spacing: 2px; margin-bottom: 14px; position:relative; }
.cta p { opacity: 0.8; font-size: 16px; margin-bottom: 32px; position:relative; }
.cta .btn { position:relative; }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.contact-card { background: #fff; border-radius: 8px; padding: 40px 32px; text-align: center; border: 1px solid var(--gray-200); transition: all .35s; }
.contact-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(10,31,61,0.1); border-color: transparent; }
.contact-avatar { width: 80px; height: 80px; margin: 0 auto 20px; border-radius: 50%; background: linear-gradient(135deg, var(--navy), var(--blue)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 30px; font-weight: 700; }
.contact-card h3 { font-size: 20px; color: var(--navy); margin-bottom: 6px; font-weight: 600; }
.contact-role { font-size: 13px; color: var(--gray-500); margin-bottom: 18px; letter-spacing: 1px; }
.contact-phone { font-size: 22px; font-weight: 700; color: var(--blue); letter-spacing: 1px; }
.contact-info-box { background: #fff; border-radius: 8px; padding: 40px; margin-top: 40px; border: 1px solid var(--gray-200); display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; text-align: center; }
.contact-info-item h4 { font-size: 16px; color: var(--navy); margin-bottom: 10px; }
.contact-info-item p { font-size: 14px; color: var(--gray-500); }

/* 页脚 */
footer { background: #061226; color: rgba(255,255,255,0.6); padding: 60px 0 0; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.foot-brand p { font-size: 13px; line-height: 1.9; margin-top: 18px; max-width: 320px; }
.foot-col h4 { color: #fff; font-size: 15px; margin-bottom: 20px; font-weight: 600; letter-spacing: 1px; }
.foot-col ul { list-style: none; }
.foot-col li { margin-bottom: 12px; font-size: 13px; transition: color .25s; cursor: pointer; }
.foot-col li:hover { color: var(--accent); }
.foot-col .foot-phone { color: var(--accent); font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.foot-bottom { padding: 22px 0; text-align: center; font-size: 12px; }

/* 轮播 */
.carousel { position: relative; border-radius: 6px; overflow: hidden; box-shadow: 0 20px 60px rgba(10,31,61,0.15); }
.carousel-track { position: relative; height: 420px; }
.slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1.2s ease; }
.slide.active { opacity: 1; }
.slide img { width: 100%; height: 100%; object-fit: cover; }
.slide-cap { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,20,40,0.82) 0%, rgba(8,20,40,0.3) 60%, transparent 100%); display: flex; align-items: center; padding: 0 60px; }
.slide-cap-inner { max-width: 440px; color: #fff; }
.slide-cap h3 { font-size: 28px; margin-bottom: 12px; }
.slide-cap h3::before { content: ''; display: block; width: 40px; height: 3px; background: var(--accent); margin-bottom: 16px; }
.slide-cap p { font-size: 14px; opacity: 0.85; line-height: 1.9; }
.dots { position: absolute; bottom: 24px; left: 60px; display: flex; gap: 10px; z-index: 5; }
.dots span { width: 36px; height: 3px; background: rgba(255,255,255,0.35); cursor: pointer; transition: all .3s; border-radius: 2px; }
.dots span.active { background: var(--accent); }
.arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); color: #fff; font-size: 18px; cursor: pointer; z-index: 5; transition: all .3s; display: flex; align-items: center; justify-content: center; border-radius: 50%; }
.arrow:hover { background: var(--blue); border-color: var(--blue); }
.arrow.prev { left: 20px; } .arrow.next { right: 20px; }

/* 首页产品预览 */
.home-prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.home-more { text-align: center; margin-top: 44px; }

@media (max-width: 900px) { .hero-desc { display: none; } .prod-grid, .home-prod-grid, .adv-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); } .ind-grid { grid-template-columns: 1fr; } .proc-grid { grid-template-columns: repeat(2,1fr); gap: 30px; } .about-grid { grid-template-columns: 1fr; gap: 30px; } .contact-info-box { grid-template-columns: 1fr; gap: 20px; } .foot-grid { grid-template-columns: 1fr 1fr; } nav ul { gap: 18px; } .topbar { display: none; } }
    .hero-desc { display: none; }
    .prod-grid, .home-prod-grid, .adv-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
    .ind-grid { grid-template-columns: 1fr; }
    .proc-grid { grid-template-columns: repeat(2,1fr); gap: 30px; }
    .about-grid { grid-template-columns: 1fr; gap: 30px; }
    .contact-info-box { grid-template-columns: 1fr; gap: 20px; }
    .foot-grid { grid-template-columns: 1fr 1fr; }
    nav ul { gap: 18px; }
    .topbar { display: none; }
}