/* ============ Base ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --bg:#05070d;
    --bg-2:#0a0f1a;
    --bg-3:#0e1524;
    --line:rgba(255,255,255,.08);
    --line-2:rgba(255,255,255,.14);
    --text:#e6ecf5;
    --text-2:#9aa6b8;
    --text-3:#6b7689;
    --brand:#00D4A8;
    --brand-2:#7CFFB2;
    --brand-glow:rgba(0,212,168,.35);
    --grad:linear-gradient(135deg,#7CFFB2 0%,#00D4A8 50%,#0099CC 100%);
    --shadow:0 24px 60px -20px rgba(0,212,168,.25);
    --radius:16px;
    --radius-lg:24px;
    --max:1240px;
    --ease:cubic-bezier(.22,.61,.36,1);
}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
    background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;
    overflow-x:hidden;position:relative;min-height:100vh;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:.3s var(--ease)}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font:inherit;color:inherit}
.container{max-width:var(--max);margin:0 auto;padding:0 32px;position:relative;z-index:2}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* ============ Background ============ */
.bg-grid{
    position:fixed;inset:0;z-index:0;pointer-events:none;
    background-image:
        linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
    background-size:60px 60px;
    mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000 30%,transparent 80%);
    -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000 30%,transparent 80%);
}
.bg-glow{
    position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
}
.bg-glow::before,.bg-glow::after{
    content:"";position:absolute;width:600px;height:600px;border-radius:50%;
    filter:blur(120px);opacity:.35;
}
.bg-glow::before{
    background:radial-gradient(circle,#00D4A8 0%,transparent 70%);
    top:-200px;left:-100px;animation:float1 18s ease-in-out infinite;
}
.bg-glow::after{
    background:radial-gradient(circle,#0099CC 0%,transparent 70%);
    top:30%;right:-200px;animation:float2 22s ease-in-out infinite;
}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(150px,100px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-120px,80px)}}

/* ============ Navbar ============ */
.navbar{
    position:fixed;top:0;left:0;right:0;z-index:100;
    padding:18px 0;transition:.4s var(--ease);
    background:rgba(5,7,13,0);backdrop-filter:blur(0);
}
.navbar.scrolled{
    padding:12px 0;background:rgba(5,7,13,.78);
    backdrop-filter:blur(20px) saturate(180%);
    -webkit-backdrop-filter:blur(20px) saturate(180%);
    border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:32px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700}
.logo-mark{display:flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:10px;
    background:linear-gradient(135deg,rgba(124,255,178,.12),rgba(0,212,168,.06));
    border:1px solid rgba(124,255,178,.25);
}
.logo-text{font-size:18px;letter-spacing:.5px;display:flex;flex-direction:column;line-height:1.1}
.logo-text em{font-style:normal;font-size:10px;color:var(--text-3);letter-spacing:2px;font-weight:500;margin-top:2px}
.nav-links{display:flex;gap:36px}
.nav-links a{font-size:14.5px;color:var(--text-2);font-weight:500;position:relative;padding:8px 0}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a::after{
    content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
    background:var(--grad);transition:.3s var(--ease);transform:translateX(-50%);
}
.nav-links a:hover::after,.nav-links a.active::after{width:24px}
.btn-nav{
    padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;
    background:var(--grad);color:#001a14;
    box-shadow:0 8px 24px -8px var(--brand-glow);
}
.btn-nav:hover{transform:translateY(-2px);box-shadow:0 14px 30px -8px var(--brand-glow)}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:28px;height:28px;justify-content:center}
.nav-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ============ Hero ============ */
.hero{
    min-height:100vh;position:relative;display:flex;align-items:center;
    padding:140px 0 80px;overflow:hidden;
}
.hero-particles{
    position:absolute;inset:0;pointer-events:none;z-index:1;
    background-image:
        radial-gradient(2px 2px at 20% 30%,rgba(124,255,178,.6),transparent),
        radial-gradient(1.5px 1.5px at 60% 70%,rgba(0,212,168,.5),transparent),
        radial-gradient(2px 2px at 80% 20%,rgba(0,153,204,.5),transparent),
        radial-gradient(1px 1px at 40% 80%,rgba(255,255,255,.4),transparent),
        radial-gradient(1.5px 1.5px at 90% 60%,rgba(124,255,178,.4),transparent);
    background-size:100% 100%;
    animation:twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle{from{opacity:.5}to{opacity:1}}
.hero-inner{text-align:center;max-width:980px;margin:0 auto}
.hero-tag{
    display:inline-block;padding:8px 20px;border-radius:999px;
    background:rgba(0,212,168,.08);border:1px solid rgba(0,212,168,.22);
    font-size:13px;letter-spacing:2px;color:var(--brand-2);
    margin-bottom:32px;font-weight:500;
}
.hero-title{
    font-size:clamp(40px,6.2vw,84px);font-weight:800;line-height:1.1;
    letter-spacing:-.02em;margin-bottom:28px;
}
.hero-sub{
    font-size:clamp(15px,1.4vw,18px);color:var(--text-2);
    max-width:680px;margin:0 auto 44px;
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:90px}
.btn-primary{
    display:inline-flex;align-items:center;gap:10px;
    padding:16px 32px;border-radius:999px;font-weight:600;font-size:15px;
    background:var(--grad);color:#001a14;
    box-shadow:0 14px 30px -10px var(--brand-glow);
    transition:.3s var(--ease);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 22px 40px -10px var(--brand-glow)}
.btn-primary .arrow{transition:.3s var(--ease)}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-ghost{
    display:inline-flex;align-items:center;gap:10px;
    padding:16px 32px;border-radius:999px;font-weight:600;font-size:15px;
    background:rgba(255,255,255,.04);color:var(--text);
    border:1px solid var(--line-2);transition:.3s var(--ease);
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--brand)}
.btn-full{width:100%;justify-content:center}
.hero-stats{
    display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
    max-width:780px;margin:0 auto;
    padding-top:40px;border-top:1px solid var(--line);
}
.stat{text-align:center}
.stat b{font-size:clamp(28px,3.4vw,42px);font-weight:700;background:var(--grad);
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    display:block;line-height:1;}
.stat span{font-size:13px;color:var(--text-3);margin-top:8px;display:block}
.hero-scroll{
    position:absolute;bottom:30px;left:50%;transform:translateX(-50%);
    font-size:11px;letter-spacing:3px;color:var(--text-3);
    display:flex;flex-direction:column;align-items:center;gap:8px;
}
.hero-scroll span{
    width:1px;height:40px;background:linear-gradient(to bottom,transparent,var(--brand));
    animation:scrollDot 2s ease-in-out infinite;
}
@keyframes scrollDot{0%,100%{transform:scaleY(.4);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}}

/* ============ Section base ============ */
.section{padding:120px 0;position:relative}
.section-alt{background:linear-gradient(180deg,transparent,rgba(0,212,168,.025),transparent)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 72px}
.sec-eyebrow{
    display:inline-block;font-size:12px;letter-spacing:4px;
    color:var(--brand);font-weight:600;margin-bottom:16px;
    padding:6px 14px;border-radius:999px;
    background:rgba(0,212,168,.08);border:1px solid rgba(0,212,168,.18);
}
.sec-title{font-size:clamp(32px,4.2vw,52px);font-weight:800;letter-spacing:-.01em;line-height:1.15;margin-bottom:18px}
.sec-desc{font-size:16px;color:var(--text-2)}

/* ============ About ============ */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:start}
.about-text p{font-size:16px;color:var(--text-2);margin-bottom:20px;line-height:1.9}
.about-feats{display:flex;flex-direction:column;gap:14px;margin-top:32px}
.feat{display:flex;align-items:center;gap:14px;font-size:15px;color:var(--text)}
.feat i{width:8px;height:8px;border-radius:50%;background:var(--grad);box-shadow:0 0 14px var(--brand-glow);flex-shrink:0}
.about-card{position:relative;padding:2px;border-radius:var(--radius-lg);
    background:linear-gradient(135deg,rgba(124,255,178,.4),rgba(0,153,204,.1) 50%,transparent);
}
.about-card-inner{
    background:linear-gradient(180deg,rgba(14,21,36,.95),rgba(10,15,26,.95));
    border-radius:calc(var(--radius-lg) - 2px);padding:36px 32px;
}
.ac-row{display:flex;justify-content:space-between;align-items:center;
    padding:16px 0;border-bottom:1px solid var(--line);
}
.ac-row:last-child{border-bottom:none}
.ac-row span{font-size:13px;color:var(--text-3);letter-spacing:1px}
.ac-row b{font-size:15px;font-weight:600;color:var(--text)}

/* ============ Services ============ */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.srv-card{
    position:relative;padding:36px 32px;border-radius:var(--radius-lg);
    background:linear-gradient(180deg,rgba(14,21,36,.6),rgba(10,15,26,.6));
    border:1px solid var(--line);transition:.4s var(--ease);overflow:hidden;
}
.srv-card::before{
    content:"";position:absolute;inset:0;border-radius:inherit;
    background:linear-gradient(135deg,rgba(124,255,178,.08),transparent 50%);
    opacity:0;transition:.4s var(--ease);
}
.srv-card:hover{transform:translateY(-6px);border-color:rgba(0,212,168,.4);
    box-shadow:0 24px 60px -20px rgba(0,212,168,.25);}
.srv-card:hover::before{opacity:1}
.srv-icon{
    width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(124,255,178,.15),rgba(0,212,168,.05));
    border:1px solid rgba(124,255,178,.2);color:var(--brand-2);margin-bottom:24px;
    transition:.4s var(--ease);
}
.srv-card:hover .srv-icon{transform:rotate(-6deg) scale(1.05);box-shadow:0 8px 20px -6px var(--brand-glow)}
.srv-card h3{font-size:20px;font-weight:700;margin-bottom:14px;position:relative;z-index:1}
.srv-card>p{font-size:14.5px;color:var(--text-2);margin-bottom:20px;position:relative;z-index:1}
.srv-card ul{list-style:none;display:flex;flex-direction:column;gap:8px;position:relative;z-index:1}
.srv-card ul li{font-size:13.5px;color:var(--text-3);padding-left:18px;position:relative}
.srv-card ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
    background:var(--brand);box-shadow:0 0 8px var(--brand);}

/* ============ Advantages ============ */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
    background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.adv-item{padding:44px 36px;background:rgba(10,15,26,.6);transition:.4s var(--ease);position:relative}
.adv-item:hover{background:rgba(14,21,36,.95);transform:translateY(-2px)}
.adv-num{font-size:14px;font-weight:700;color:var(--brand);letter-spacing:2px;margin-bottom:18px;
    display:inline-block;padding:6px 12px;border-radius:8px;
    background:rgba(0,212,168,.08);border:1px solid rgba(0,212,168,.18);}
.adv-item h4{font-size:19px;font-weight:700;margin-bottom:12px}
.adv-item p{font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ============ Cases ============ */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case-card{
    position:relative;padding:40px 36px;border-radius:var(--radius-lg);
    background:linear-gradient(135deg,rgba(14,21,36,.8),rgba(10,15,26,.6));
    border:1px solid var(--line);transition:.4s var(--ease);overflow:hidden;
}
.case-card::after{
    content:"";position:absolute;top:0;right:0;width:200px;height:200px;
    background:radial-gradient(circle,rgba(0,212,168,.12) 0%,transparent 70%);
    transform:translate(60px,-60px);transition:.5s var(--ease);
}
.case-card:hover{transform:translateY(-4px);border-color:rgba(0,212,168,.35);box-shadow:var(--shadow)}
.case-card:hover::after{transform:translate(40px,-40px) scale(1.2)}
.case-tag{display:inline-block;padding:6px 14px;border-radius:999px;
    background:rgba(0,212,168,.1);color:var(--brand-2);
    font-size:12px;font-weight:600;letter-spacing:1px;margin-bottom:18px;
    border:1px solid rgba(0,212,168,.2);position:relative;z-index:1}
.case-card h3{font-size:22px;font-weight:700;margin-bottom:14px;position:relative;z-index:1}
.case-card>p{font-size:14.5px;color:var(--text-2);margin-bottom:24px;position:relative;z-index:1;line-height:1.8}
.case-meta{display:flex;justify-content:space-between;align-items:center;
    padding-top:20px;border-top:1px solid var(--line);
    font-size:13px;color:var(--text-3);position:relative;z-index:1}
.case-meta span:first-child{color:var(--brand-2);font-family:"SF Mono",Consolas,Monaco,monospace}

/* ============ Contact ============ */
.contact{padding-bottom:140px}
.contact-card{
    display:grid;grid-template-columns:1fr 1.05fr;gap:0;
    border-radius:var(--radius-lg);overflow:hidden;
    background:linear-gradient(135deg,rgba(14,21,36,.95),rgba(10,15,26,.95));
    border:1px solid var(--line);position:relative;
}
.contact-card::before{
    content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;
    background:var(--grad);
}
.contact-left{padding:60px 50px;background:linear-gradient(180deg,rgba(0,212,168,.04),transparent)}
.contact-left .sec-eyebrow{margin-bottom:18px}
.contact-left .sec-title{font-size:40px;text-align:left;margin-bottom:16px}
.contact-left .sec-desc{text-align:left;margin-bottom:36px;font-size:15px}
.contact-info{display:flex;flex-direction:column;gap:18px}
.ci-item{display:flex;flex-direction:column;gap:6px;padding:14px 16px;
    border-radius:12px;background:rgba(255,255,255,.02);border:1px solid var(--line)}
.ci-label{font-size:12px;color:var(--text-3);letter-spacing:1.5px}
.ci-val{font-size:15px;font-weight:600;color:var(--text)}
.contact-form{padding:60px 50px;display:grid;grid-template-columns:1fr 1fr;gap:20px}
.fg{display:flex;flex-direction:column;gap:8px}
.fg-full{grid-column:1/-1}
.fg label{font-size:13px;color:var(--text-2);font-weight:500;letter-spacing:.5px}
.fg input,.fg select,.fg textarea{
    padding:14px 16px;border-radius:12px;
    background:rgba(255,255,255,.03);
    border:1px solid var(--line-2);color:var(--text);
    font-size:14.5px;transition:.3s var(--ease);outline:none;
    font-family:inherit;resize:vertical;
}
.fg input::placeholder,.fg textarea::placeholder{color:var(--text-3)}
.fg input:focus,.fg select:focus,.fg textarea:focus{
    border-color:var(--brand);background:rgba(0,212,168,.05);
    box-shadow:0 0 0 4px rgba(0,212,168,.08);
}
.fg select{appearance:none;-webkit-appearance:none;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239aa6b8' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right 16px center;padding-right:42px}
.fg select option{background:#0e1524;color:var(--text)}
.contact-form .btn-primary{grid-column:1/-1;margin-top:8px}

/* ============ Footer ============ */
.footer{padding:80px 0 0;background:linear-gradient(180deg,transparent,rgba(0,0,0,.3));border-top:1px solid var(--line);margin-top:40px}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;padding-bottom:60px}
.footer-brand p{color:var(--text-2);font-size:14.5px;margin-top:18px;max-width:300px;line-height:1.8}
.footer-col h5{font-size:14px;font-weight:700;margin-bottom:20px;letter-spacing:1px}
.footer-col a{display:block;color:var(--text-2);font-size:14px;margin-bottom:12px}
.footer-col a:hover{color:var(--brand-2)}
.footer-bottom{padding:24px 0;border-top:1px solid var(--line)}
.footer-bottom .container{display:flex;justify-content:space-between;font-size:13px;color:var(--text-3);flex-wrap:wrap;gap:12px}

/* ============ Animations ============ */
.reveal{opacity:0;transform:translateY(30px);transition:.9s var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ============ Responsive ============ */
@media (max-width:1024px){
    .services-grid,.adv-grid{grid-template-columns:repeat(2,1fr)}
    .case-grid{grid-template-columns:1fr}
    .footer-inner{grid-template-columns:1fr 1fr;gap:36px}
    .about-grid{grid-template-columns:1fr;gap:40px}
    .contact-card{grid-template-columns:1fr}
    .contact-left,.contact-form{padding:44px 36px}
    .contact-left .sec-title{font-size:34px}
}
@media (max-width:768px){
    .container{padding:0 20px}
    .nav-links,.btn-nav{display:none}
    .nav-toggle{display:flex}
    .nav-links.open{
        display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;
        background:rgba(5,7,13,.96);backdrop-filter:blur(20px);
        padding:24px;gap:6px;border-bottom:1px solid var(--line);
    }
    .nav-links.open a{padding:14px 12px;border-radius:10px}
    .nav-links.open a:hover{background:rgba(255,255,255,.04)}
    .hero{padding:120px 0 60px;min-height:auto}
    .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px}
    .section{padding:80px 0}
    .sec-head{margin-bottom:48px}
    .services-grid,.adv-grid{grid-template-columns:1fr}
    .footer-inner{grid-template-columns:1fr;gap:32px;padding-bottom:40px}
    .contact-form{grid-template-columns:1fr;padding:32px 24px}
    .contact-left{padding:36px 24px}
    .footer-bottom .container{flex-direction:column;text-align:center}
}