@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
:root{
  --navy:#283C8C;
  --navy-deep:#1f2e6e;
  --blue:#3C78B4;
  --cyan:#64C8C8;
  --ink:#0f172a;
  --slate:#475569;
  --muted:#94a3b8;
  --line:#e2e8f0;
  --cloud:#f1f5f9;
  --mist:#f8fafc;
  --white:#ffffff;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.05);
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --shadow-lg:0 24px 60px rgba(15,23,42,.12);
}
*{box-sizing:border-box;}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
a{color:inherit;text-decoration:none;}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1);}
.reveal.in{opacity:1;transform:none;}
.reveal[data-d="1"]{transition-delay:.08s;}
.reveal[data-d="2"]{transition-delay:.16s;}
.reveal[data-d="3"]{transition-delay:.24s;}
.reveal[data-d="4"]{transition-delay:.32s;}
.reveal[data-d="5"]{transition-delay:.4s;}
.reveal[data-d="6"]{transition-delay:.48s;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}.anim-none{animation:none!important;}}

/* ===== 顶部导航 ===== */
.site-nav{position:fixed;inset:0 0 auto 0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .3s ease;height:72px;}
.site-nav.scrolled{box-shadow:var(--shadow-sm);}
.site-nav .nav-inner{max-width:1280px;margin:0 auto;height:72px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;}
.nav-logo{display:flex;align-items:center;gap:10px;}
.nav-logo img{height:38px;width:auto;}
.nav-links{display:none;align-items:center;gap:6px;}
@media(min-width:768px){.nav-links{display:flex;}}
.nav-link{position:relative;padding:8px 14px;font-size:14px;font-weight:500;color:var(--slate);border-radius:8px;transition:color .25s ease,background .25s ease;}
.nav-link:hover{color:var(--navy);background:var(--mist);}
.nav-link.active{color:var(--navy);}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--cyan);}
.nav-cta{display:none;}
@media(min-width:768px){.nav-cta{display:inline-flex;}}
.en-btn{font-size:12px;font-weight:700;color:#fff;background:var(--navy);padding:7px 14px;border-radius:999px;transition:background .25s ease,transform .25s ease;}
.en-btn:hover{background:var(--navy-deep);transform:translateY(-1px);}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;color:var(--ink);background:var(--mist);}
@media(min-width:768px){.nav-toggle{display:none;}}

/* 产品下拉 */
.prod-drop{position:fixed;left:50%;top:72px;transform:translateX(-50%) translateY(8px);width:min(880px,94vw);background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:60;overflow:hidden;}
.prod-drop.open{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.prod-drop .grid{display:grid;gap:8px;padding:26px;}
@media(min-width:768px){.prod-drop .grid{grid-template-columns:repeat(3,1fr);}}
.prod-col h4{font-size:13px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px;padding-bottom:12px;margin-bottom:8px;border-bottom:1px solid var(--line);}
.prod-col a.sub{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;transition:background .2s ease,transform .2s ease;}
.prod-col a.sub:hover{background:var(--mist);transform:translateX(2px);}
.prod-col a.sub .ico{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex:none;background:var(--cloud);color:var(--navy);}
.prod-col a.sub .t{font-size:13px;font-weight:600;color:var(--slate);}
.prod-col a.sub:hover .t{color:var(--navy);}
.prod-col a.sub .e{font-size:11px;color:var(--muted);}
.prod-foot{border-top:1px solid var(--line);padding:14px 26px;text-align:center;}

/* 移动菜单 */
.mobile-menu{display:none;flex-direction:column;gap:2px;padding:16px 20px 22px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);}
.mobile-menu.open{display:flex;}
.mobile-menu a{padding:12px 8px;font-size:15px;font-weight:500;color:var(--slate);border-radius:10px;}
.mobile-menu a:hover{background:var(--mist);color:var(--navy);}
.mobile-menu .m-group-title{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:14px 8px 6px;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;padding:13px 26px;border-radius:12px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;cursor:pointer;border:1px solid transparent;line-height:1;}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 8px 20px rgba(40,60,140,.25);}
.btn-primary:hover{background:var(--navy-deep);transform:translateY(-2px);box-shadow:0 12px 28px rgba(40,60,140,.32);}
.btn-ghost{background:#fff;color:var(--navy);border-color:var(--line);}
.btn-ghost:hover{background:var(--mist);border-color:var(--navy);transform:translateY(-2px);}
.btn-cyan{background:var(--cyan);color:#06343a;box-shadow:0 8px 20px rgba(100,200,200,.3);}
.btn-cyan:hover{transform:translateY(-2px);filter:brightness(1.04);}
.btn-sm{padding:9px 18px;font-size:13px;border-radius:10px;}

/* ===== 标签 / 胶囊 ===== */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;background:var(--mist);color:var(--navy);border:1px solid var(--line);}
.pill-cyan{background:rgba(100,200,200,.14);color:#0c5b61;border-color:rgba(100,200,200,.35);}
.kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);margin-bottom:14px;}
.section-title{font-size:clamp(26px,3.4vw,40px);font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.15;}
.section-desc{color:var(--slate);font-size:15px;line-height:1.7;max-width:640px;}

/* ===== 卡片 ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:18px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cdd9f0;}

/* ===== 页面 Banner ===== */
.banner{position:relative;overflow:hidden;padding:140px 0 70px;background:linear-gradient(120deg,var(--navy) 0%,var(--blue) 55%,var(--cyan) 130%);}
.banner.has-img{background-size:cover;background-position:center;background-color:var(--navy);}
.banner.has-img::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(31,46,110,.86),rgba(60,120,180,.55));}
.banner .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;pointer-events:none;}
.banner .inner{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:0 20px;}
.banner .b-sub{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.8);}
.banner .b-title{font-size:clamp(32px,4.6vw,54px);font-weight:800;color:#fff;letter-spacing:-.02em;margin:10px 0 12px;line-height:1.1;}
.banner .b-desc{color:rgba(255,255,255,.88);font-size:16px;max-width:620px;line-height:1.7;}

/* ===== 表单 ===== */
.field{width:100%;padding:13px 16px;border:1px solid var(--line);border-radius:12px;font-size:15px;color:var(--ink);background:#fff;outline:none;transition:border-color .2s ease,box-shadow .2s ease;}
.field:focus{border-color:var(--navy);box-shadow:0 0 0 4px rgba(40,60,140,.1);}
.field-label{font-size:13px;font-weight:600;color:var(--slate);margin-bottom:7px;display:block;}
.alert-ok{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#15803d;border-radius:14px;padding:18px 22px;}
.alert-err{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.3);color:#b91c1c;border-radius:14px;padding:14px 18px;font-size:14px;}

/* ===== 产品详情组件 ===== */
.pd-hero{position:relative;overflow:hidden;padding:120px 0 64px;background:linear-gradient(120deg,var(--navy),var(--blue));}
.pd-hero .blob{position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(100,200,200,.35);filter:blur(90px);top:-120px;right:-80px;pointer-events:none;}
.main-img{width:340px;height:340px;max-width:100%;border-radius:20px;overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);}
.main-img img{width:100%;height:100%;object-fit:contain;}
.thumb-row{display:flex;gap:8px;margin-top:14px;justify-content:center;}
.thumb{width:54px;height:54px;border-radius:10px;overflow:hidden;border:2px solid transparent;cursor:pointer;background:#fff;display:flex;align-items:center;justify-content:center;opacity:.6;transition:all .2s;}
.thumb:hover{opacity:.9;}
.thumb.active{border-color:var(--cyan);opacity:1;}
.thumb img{width:100%;height:100%;object-fit:cover;}
.tab-bar{position:sticky;top:72px;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.tab-bar .inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;gap:4px;}
.tab-btn{position:relative;padding:16px 22px;font-size:14px;font-weight:600;color:var(--slate);background:none;border:none;cursor:pointer;transition:color .2s;}
.tab-btn::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:0;height:2px;border-radius:2px;background:var(--cyan);transition:width .25s;}
.tab-btn:hover{color:var(--ink);}
.tab-btn.active{color:var(--navy);}
.tab-btn.active::after{width:60%;}
.tab-panel{display:none;}
.tab-panel.active{display:block;animation:fadeUp .4s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.feature-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);align-items:flex-start;}
.feature-row:last-child{border-bottom:none;}
.feature-row .dot{width:9px;height:9px;border-radius:50%;background:var(--cyan);margin-top:7px;flex:none;}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;}
.spec-table tr{border-bottom:1px solid var(--line);}
.spec-table tr:last-child{border-bottom:none;}
.spec-table td{padding:13px 16px;vertical-align:middle;}
.spec-table td:first-child{width:200px;font-weight:600;color:var(--slate);background:var(--mist);}
.prose-c{font-size:15px;line-height:1.85;color:var(--slate);}
.prose-c h3{font-size:18px;font-weight:700;color:var(--ink);margin:26px 0 12px;}
.prose-c p{margin-bottom:12px;}
.prose-c ul{list-style:disc;padding-left:20px;margin-bottom:12px;}
.prose-c ul li{margin-bottom:4px;}
.article-body{font-size:16px;line-height:1.9;color:var(--slate);}
.article-body h2,.article-body h3,.article-body h4{color:var(--ink);font-weight:700;margin:28px 0 12px;line-height:1.35;}
.article-body img{max-width:100%;border-radius:14px;margin:10px 0;}

/* ===== 页脚 ===== */
.site-footer{background:var(--mist);border-top:1px solid var(--line);color:var(--slate);}
.site-footer .inner{max-width:1280px;margin:0 auto;padding:64px 20px 32px;}
.site-footer h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:20px;}
.site-footer a:hover{color:var(--navy);}
.site-footer .copy{border-top:1px solid var(--line);padding-top:24px;margin-top:40px;font-size:13px;color:var(--muted);}
.fab{position:fixed;right:22px;bottom:22px;z-index:50;display:flex;flex-direction:column;gap:12px;}
.fab button,.fab a{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);transition:transform .2s,background .2s,color .2s;color:#fff;background:var(--navy);}
.fab button:hover,.fab a:hover{transform:translateY(-3px);background:var(--navy-deep);}
.fab .qr-pop{position:absolute;bottom:58px;right:0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow-lg);width:176px;text-align:center;display:none;}
.fab .qr-pop.show{display:block;}
.fab .qr-pop img{width:144px;height:144px;border-radius:10px;object-fit:contain;}

/* 回到顶部 */
#backTop{opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;}
#backTop.show{opacity:1;visibility:visible;}

/* 容器辅助 */
.wrap{max-width:1280px;margin:0 auto;padding:0 20px;}
.section{padding:88px 0;}
.section.alt{background:var(--mist);}
@media(max-width:640px){.section{padding:60px 0;}.banner{padding:120px 0 56px;}}

/* 统计块 */
.stat-num{font-size:clamp(30px,4vw,44px);font-weight:800;color:var(--navy);line-height:1;letter-spacing:-.02em;}
.divider{height:1px;background:var(--line);border:none;}

/* 空态 */
.empty-state{text-align:center;padding:70px 20px;color:var(--muted);}
.empty-state .ico{font-size:54px;color:var(--line);}

/* ===== 首页 Hero（轮播，左文右图） ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,var(--navy) 0%,var(--blue) 55%,var(--cyan) 135%);padding:132px 0 84px;}
.hero .blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.45;pointer-events:none;}
.hero-slide{display:none;}
.hero-slide.active{display:block;animation:fadeUp .5s ease;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:32px;}}
.hero-eyebrow{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.82);}
.hero-title{font-size:clamp(34px,4.8vw,58px);font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.08;margin:14px 0;}
.hero-sub{font-size:clamp(17px,2vw,22px);font-weight:300;color:rgba(255,255,255,.92);line-height:1.5;}
.hero-desc{color:rgba(255,255,255,.82);font-size:15px;line-height:1.8;margin-top:14px;max-width:520px;}
.hero-card{width:100%;aspect-ratio:4/3;border-radius:26px;overflow:hidden;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);box-shadow:var(--shadow-lg);}
.hero-card img{width:100%;height:100%;object-fit:cover;}
.hero-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap;}
.hero-stats .hs b{display:block;font-size:24px;font-weight:800;color:#fff;}
.hero-stats .hs span{font-size:12px;color:rgba(255,255,255,.78);}
.hero-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s;z-index:5;}
.hero-nav:hover{background:rgba(255,255,255,.34);}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5;}
.hero-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s;}
.hero-dot.active{background:#fff;width:26px;border-radius:6px;}

/* 业务板块卡 */
.biz-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:#cdd9f0;}
.biz-media{aspect-ratio:2/1;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#eef3fb,#dbe6f7);}
.biz-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.biz-card:hover .biz-media img{transform:scale(1.06);}

/* 行业应用卡 */
.app-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .35s ease,box-shadow .35s ease;}
.app-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.app-media{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#eef3fb,#dbe6f7);position:relative;}
.app-media img{width:100%;height:100%;object-fit:cover;}
.app-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,23,42,.18);}
.app-play .circle{width:56px;height:56px;border-radius:50%;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(40,60,140,.3);transition:transform .4s;}
.app-card:hover .app-play .circle{transform:rotate(180deg) scale(1.08);}

/* 深色数据带 */
.band-dark{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy-deep),var(--navy) 60%,var(--blue));}
.band-dark .grid-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
@media(min-width:640px){.band-dark .grid-stats{grid-template-columns:repeat(3,1fr);}}
@media(min-width:1024px){.band-dark .grid-stats{grid-template-columns:repeat(6,1fr);}}
.stat-box{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:24px;text-align:center;}
.stat-box .n{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:#fff;line-height:1;}
.stat-box .u{font-size:13px;color:rgba(255,255,255,.75);margin-top:8px;}