/* ── 全局变量 ── */
:root{
  --c1:#00e5ff;    /* 主色：青蓝 */
  --c2:#0062ff;    /* 辅色：深蓝 */
  --c3:#7b2fff;    /* 点缀：紫 */
  --bg:#04090f;    /* 背景 */
  --bg2:#080f1a;   /* 卡片背景 */
  --tx:#d0e4f7;    /* 主文字 */
  --txm:#7a9ab8;   /* 次文字 */
  --bdr:rgba(0,229,255,0.12); /* 边框 */
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--tx);font-family:'Noto Sans SC',sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}

/* ── 滚动条 ── */
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:#04090f}
::-webkit-scrollbar-thumb{background:var(--c1);border-radius:2px}

/* ── 通用 ── */
.sec{padding:96px 0}
.wrap{max-width:1160px;margin:0 auto;padding:0 40px}
.sec-title{text-align:center;margin-bottom:64px}
.sec-title h2{font-family:'Orbitron',sans-serif;font-size:clamp(22px,3vw,32px);letter-spacing:.05em;background:linear-gradient(135deg,#fff 30%,var(--c1));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.sec-title p{color:var(--txm);margin-top:12px;font-size:14px;letter-spacing:.1em}
.tag{display:inline-block;padding:3px 12px;border:1px solid var(--c1);color:var(--c1);font-size:12px;letter-spacing:.15em;border-radius:2px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border:1px solid var(--c1);color:var(--c1);font-size:14px;letter-spacing:.1em;cursor:pointer;text-decoration:none;transition:.3s;position:relative;overflow:hidden;font-family:'Noto Sans SC',sans-serif}
.btn::before{content:'';position:absolute;inset:0;background:var(--c1);transform:scaleX(0);transform-origin:left;transition:.3s;z-index:0}
.btn:hover::before{transform:scaleX(1)}
.btn:hover{color:#000}
.btn span,.btn svg{position:relative;z-index:1}
.btn-solid{background:var(--c1);color:#000;border-color:var(--c1)}
.btn-solid::before{background:#00b8d4}

/* ── 网格线背景 ── */
.grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(0,229,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,229,255,.04) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}

/* ── 入场动画 ── */
.fade-up{opacity:0;transform:translateY(36px);transition:opacity .7s ease,transform .7s ease}
.fade-up.visible{opacity:1;transform:none}

/* ══════════════════════════════
   导航栏
══════════════════════════════ */
#nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 40px;height:64px;display:flex;align-items:center;justify-content:space-between;transition:.4s;border-bottom:1px solid transparent}
#nav.scrolled{background:rgba(4,9,15,.92);backdrop-filter:blur(12px);border-color:var(--bdr)}
.nav-logo{font-family:'Orbitron',sans-serif;font-size:18px;font-weight:700;color:#fff;letter-spacing:.1em;text-decoration:none;display:flex;align-items:center;gap:10px}
.nav-logo .dot{width:8px;height:8px;background:var(--c1);border-radius:50%;box-shadow:0 0 8px var(--c1);animation:blink 1.8s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
.nav-links{display:flex;gap:36px;list-style:none}
.nav-links a{color:#fff;text-decoration:none;font-size:14px;letter-spacing:.05em;transition:.3s;position:relative;padding-bottom:4px}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:1px;background:var(--c1);transition:.3s}
.nav-links a:hover{color:var(--c1)}
.nav-links a:hover::after{width:100%}
.nav-cta{padding:8px 20px;border:1px solid var(--c1);color:var(--c1);font-size:13px;cursor:pointer;transition:.3s;font-family:'Noto Sans SC',sans-serif;text-decoration:none}
.nav-cta:hover{background:var(--c1);color:#000}

/* ══════════════════════════════
   英雄轮播
background-size: cover;background-repeat: no-repeat;background-position: center;
══════════════════════════════ */
#hero{position:relative;height:100vh;overflow:hidden;display:flex;align-items:center}
.hero-slides{position:absolute;inset:0}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.2s ease}
.slide.active{opacity:1}
.slide-bg{position:absolute;inset:0;background-size:cover;background-repeat: no-repeat;background-position:center}
/* 三张幻灯背景渐变 */
.slide:nth-child(1) .slide-bg{background-image: url(../img/b-1.jpg);}
.slide:nth-child(2) .slide-bg{background-image: url(../img/b-2.jpg);}
.slide:nth-child(3) .slide-bg{background-image: url(../img/b-3.jpg);}
.slide-content{position:relative;z-index:2;max-width:1160px;margin:0 auto;padding:0 40px}
.slide-content .tag{opacity:0;transform:translateY(20px);transition:.6s .2s}
.slide.active .tag{opacity:1;transform:none}
.slide-content h1{font-family:'Orbitron',sans-serif;font-size:clamp(28px,5vw,58px);font-weight:900;line-height:1.15;letter-spacing:.02em;opacity:0;transform:translateY(30px);transition:.7s .4s;max-width:700px}
.slide.active h1{opacity:1;transform:none}
.slide-content h1 em{font-style:normal;color:var(--c1)}
.slide-content p{color:var(--txm);font-size:clamp(14px,1.5vw,17px);max-width:520px;margin:20px 0 36px;opacity:0;transition:.7s .6s}
.slide.active p{opacity:1}
.slide-btns{display:flex;gap:16px;flex-wrap:wrap;opacity:0;transition:.7s .8s}
.slide.active .slide-btns{opacity:1}
/* 粒子 */
.particles{position:absolute;inset:0;z-index:1;overflow:hidden}
.p-dot{position:absolute;width:2px;height:2px;background:var(--c1);border-radius:50%;animation:float linear infinite;opacity:0}
@keyframes float{0%{opacity:0;transform:translateY(0)}10%{opacity:.6}90%{opacity:.3}100%{opacity:0;transform:translateY(-100vh)}}
/* 轮播控制 */
.hero-dots{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:10}
.hero-dots span{width:28px;height:2px;background:var(--txm);cursor:pointer;transition:.3s}
.hero-dots span.active{background:var(--c1);width:48px}
.hero-progress{position:absolute;top:0;left:0;height:2px;background:var(--c1);transition:width 5s linear;box-shadow:0 0 8px var(--c1)}
/* 装饰线框 */
.hero-deco{position:absolute;right:10%;top:50%;transform:translateY(-50%);width:320px;height:320px;z-index:1;pointer-events:none}
.hero-deco::before,.hero-deco::after{content:'';position:absolute;border:1px solid var(--bdr);animation:spin-slow linear infinite}
.hero-deco::before{inset:0;border-radius:50%;animation-duration:20s}
.hero-deco::after{inset:24px;border-radius:50%;animation-duration:14s;animation-direction:reverse;border-color:rgba(123,47,255,.15)}
@keyframes spin-slow{to{transform:rotate(360deg)}}
.hero-deco-inner{position:absolute;inset:48px;border:1px dashed rgba(0,229,255,.1);border-radius:50%;display:flex;align-items:center;justify-content:center}
.hero-deco-inner::after{content:'◈';font-size:32px;color:rgba(0,229,255,.2)}

/* ══════════════════════════════
   服务内容
══════════════════════════════ */
#services{position:relative;background:var(--bg2)}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1px;background:#080f1a}
.srv-card{background:var(--bg2);padding:40px 36px;position:relative;overflow:hidden;transition:.4s;cursor:default}
.srv-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,229,255,.05) 0%,transparent 60%);opacity:0;transition:.4s}
.srv-card:hover{background:#0a1525}
.srv-card:hover::before{opacity:1}
.srv-icon{width:52px;height:52px;border:1px solid var(--bdr);display:flex;align-items:center;justify-content:center;margin-bottom:24px;position:relative;transition:.4s}
.srv-card:hover .srv-icon{border-color:var(--c1);box-shadow:0 0 16px rgba(0,229,255,.2)}
.srv-icon svg{width:24px;height:24px;stroke:var(--c1);fill:none;stroke-width:1.5}
.srv-card h3{font-size:17px;font-weight:500;margin-bottom:12px;letter-spacing:.02em}
.srv-card p{color:var(--txm);font-size:13.5px;line-height:1.8}
.srv-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:20px}
.srv-card .tags span{padding:3px 10px;border:1px solid var(--bdr);color:var(--txm);font-size:11px;letter-spacing:.08em;transition:.3s}
.srv-card:hover .tags span{border-color:rgba(0,229,255,.25);color:var(--c1)}
/* 角标 */
.srv-num{position:absolute;top:16px;right:20px;font-family:'Orbitron',sans-serif;font-size:28px;font-weight:900;color:rgba(0,229,255,.06);line-height:1}

/* ══════════════════════════════
   客户评价
══════════════════════════════ */
#reviews{position:relative;background:var(--bg)}
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.rv-card{background:var(--bg2);border:1px solid var(--bdr);padding:36px 32px;position:relative;transition:.4s}
.rv-card::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--c1),var(--c2));transition:.4s}
.rv-card:hover{border-color:rgba(0,229,255,.3);transform:translateY(-4px)}
.rv-card:hover::after{width:100%}
.rv-quote{font-size:36px;line-height:1;color:var(--c1);opacity:.3;font-family:serif;margin-bottom:8px}"
.rv-text{color:var(--tx);font-size:14px;line-height:1.9;margin-bottom:24px;font-style:italic}
.rv-author{display:flex;align-items:center;gap:14px}
.rv-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--c2),var(--c3));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:#fff;flex-shrink:0}
.rv-info strong{display:block;font-size:14px;font-weight:500}
.rv-info span{color:var(--txm);font-size:12px}
.stars{color:var(--c1);font-size:13px;letter-spacing:2px;margin-bottom:8px}

/* ══════════════════════════════
   战略合作
══════════════════════════════ */
#partners{background:var(--bg2);padding:72px 0;overflow:hidden}
.partners-track-wrap{overflow:hidden;position:relative}
.partners-track-wrap::before,.partners-track-wrap::after{content:'';position:absolute;top:0;bottom:0;width:120px;z-index:2;pointer-events:none}
.partners-track-wrap::before{left:0;background:linear-gradient(90deg,var(--bg2),transparent)}
.partners-track-wrap::after{right:0;background:linear-gradient(-90deg,var(--bg2),transparent)}
.partners-track{display:flex;gap:48px;animation:marquee 24s linear infinite;width:max-content}
.partners-track:hover{animation-play-state:paused}
.partner-logo{width:140px;height:60px;border:1px solid var(--bdr);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:.3s;cursor:default}
.partner-logo:hover{border-color:rgba(0,229,255,.4);background:rgba(0,229,255,.04)}
.partner-logo span{font-family:'Orbitron',sans-serif;font-size:13px;font-weight:700;color:var(--txm);letter-spacing:.1em;transition:.3s}
.partner-logo:hover span{color:var(--c1)}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ══════════════════════════════
   新闻资讯
══════════════════════════════ */
#news{background:var(--bg);position:relative}
.news-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:24px}
@media(max-width:900px){.news-grid{grid-template-columns:1fr}}
.news-main{background:var(--bg2);border:1px solid var(--bdr);overflow:hidden;transition:.3s}
.news-main:hover{border-color:rgba(0,229,255,.3)}
.news-main-img{height:200px;background:linear-gradient(135deg,rgba(0,98,255,.3),rgba(0,229,255,.1));position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
.news-main-img::before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(45deg,transparent,transparent 20px,rgba(0,229,255,.04) 20px,rgba(0,229,255,.04) 21px)}
.news-label{background:var(--c1);color:#000;font-size:11px;padding:3px 10px;font-weight:700;letter-spacing:.08em}
.news-main-body{padding:28px 28px 32px}
.news-main-body h3{font-size:18px;font-weight:500;line-height:1.5;margin-bottom:12px}
.news-main-body p{color:var(--txm);font-size:13px;line-height:1.8}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:16px;color:var(--txm);font-size:12px}
.news-side{display:flex;flex-direction:column;gap:16px}
.news-item{background:var(--bg2);border:1px solid var(--bdr);padding:22px 24px;transition:.3s;cursor:default;flex:1}
.news-item:hover{border-color:rgba(0,229,255,.3);transform:translateX(4px)}
.news-item .news-label{margin-bottom:12px}
.news-item h4{font-size:14px;font-weight:500;line-height:1.6;margin-bottom:8px}
.news-item p{color:var(--txm);font-size:12px;line-height:1.7}
.news-item .news-meta{margin-top:12px}

/* ══════════════════════════════
   关于我们
══════════════════════════════ */
#about{background:var(--bg2);position:relative;overflow:hidden}
#about .grid-bg{opacity:.5}
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
@media(max-width:900px){.about-layout{grid-template-columns:1fr}}
.about-text .tag{margin-bottom:20px}
.about-text h2{font-family:'Orbitron',sans-serif;font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.25;letter-spacing:.02em;margin-bottom:20px;background:linear-gradient(135deg,#fff 40%,var(--c1));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.about-text p{color:var(--txm);font-size:14px;line-height:2;margin-bottom:16px}
.about-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:40px 0}
.stat{border-left:2px solid var(--c1);padding-left:20px}
.stat strong{display:block;font-family:'Orbitron',sans-serif;font-size:28px;font-weight:700;color:var(--c1);line-height:1}
.stat span{display:block;color:var(--txm);font-size:12px;margin-top:6px;letter-spacing:.05em}
.about-visual{position:relative}
.about-visual-box{aspect-ratio:1;border:1px solid var(--bdr);position:relative;overflow:hidden}
.about-visual-box::before,.about-visual-box::after{content:'';position:absolute}
.about-visual-box::before{inset:20px;border:1px dashed rgba(0,229,255,.12)}
.about-visual-box::after{inset:40px;background:radial-gradient(circle,rgba(0,98,255,.15) 0%,transparent 70%);animation:pulse 3s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.4;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
.tech-bars{position:absolute;inset:60px;display:flex;flex-direction:column;justify-content:space-around;padding:20px}
.tech-bar-item{display:flex;flex-direction:column;gap:6px}
.tech-bar-label{display:flex;justify-content:space-between;font-size:12px;color:var(--txm)}
.tech-bar-track{height:3px;background:rgba(255,255,255,.06);border-radius:2px;overflow:hidden}
.tech-bar-fill{height:100%;background:linear-gradient(90deg,var(--c1),var(--c2));transform-origin:left;animation:bar-grow 1.5s ease forwards;transform:scaleX(0)}
@keyframes bar-grow{to{transform:scaleX(1)}}

/* ══════════════════════════════
   页脚
══════════════════════════════ */
#footer{background:#02060d;border-top:1px solid var(--bdr);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px;margin-bottom:56px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer-brand h3{font-family:'Orbitron',sans-serif;font-size:18px;font-weight:700;color:#fff;margin-bottom:12px}
.footer-brand p{color:var(--txm);font-size:13px;line-height:1.9;max-width:260px;margin-bottom:24px}
.footer-socials{display:flex;gap:10px}
.social-btn{width:36px;height:36px;border:1px solid var(--bdr);display:flex;align-items:center;justify-content:center;transition:.3s;cursor:pointer}
.social-btn:hover{border-color:var(--c1);background:rgba(0,229,255,.08)}
.social-btn svg{width:16px;height:16px;stroke:var(--txm);fill:none;transition:.3s}
.social-btn:hover svg{stroke:var(--c1)}
.footer-col h4{font-size:13px;font-weight:500;color:#fff;letter-spacing:.1em;margin-bottom:20px;position:relative;padding-bottom:12px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:24px;height:1px;background:var(--c1)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--txm);text-decoration:none;font-size:13px;transition:.3s}
.footer-col a:hover{color:var(--c1)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;color:var(--txm);font-size:13px}
.footer-contact svg{width:15px;height:15px;stroke:var(--c1);fill:none;flex-shrink:0;margin-top:2px}
.footer-bottom{border-top:1px solid var(--bdr);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{color:var(--txm);font-size:12px}
.footer-bottom a{color:var(--txm);text-decoration:none;transition:.3s}
.footer-bottom a:hover{color:var(--c1)}
/* 备案号 */
.icp{display:flex;gap:20px}

/* 回顶部 */
#top-btn{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border:1px solid var(--bdr);background:rgba(4,9,15,.9);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:99;opacity:0;transition:.3s;backdrop-filter:blur(8px)}
#top-btn.show{opacity:1}
#top-btn:hover{border-color:var(--c1);background:rgba(0,229,255,.1)}
#top-btn svg{width:18px;height:18px;stroke:var(--c1);fill:none}