/* ============ Reset & Base ============ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:#2d3436;line-height:1.7;overflow-x:hidden;background:#fff}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:100px 0}
.section-title{font-size:2.2rem;text-align:center;color:#1a1a2e;margin-bottom:12px}
.section-divider{width:60px;height:4px;background:linear-gradient(135deg,#5521b8,#fd9e01);margin:0 auto 48px;border-radius:2px}

/* ============ Navigation ============ */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:16px 0;transition:all .35s ease}
.navbar.scrolled{background:rgba(15,15,30,.95);backdrop-filter:blur(12px);padding:12px 0;box-shadow:0 2px 20px rgba(0,0,0,.25)}
.nav-container{display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:1.5rem;font-weight:700;color:#fff;letter-spacing:2px}
.navbar.scrolled .nav-logo{color:#fff}
.nav-menu{display:flex;gap:36px;align-items:center}
.nav-link{color:rgba(255,255,255,.85);font-size:.95rem;font-weight:500;transition:color .3s;position:relative}
.nav-link::after{content:'';position:absolute;bottom:-6px;left:0;width:0;height:2px;background:#fd9e01;border-radius:2px;transition:width .3s}
.nav-link:hover,.nav-link.active{color:#fff}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;z-index:1001}
.nav-toggle span{display:block;width:26px;height:2px;background:#fff;border-radius:2px;transition:all .35s ease}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#1a0a2e 0%,#2d1465 30%,#1a1040 60%,#0f0c29 100%)}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at 70% 30%,rgba(253,158,1,.1) 0%,transparent 50%),radial-gradient(ellipse at 20% 50%,rgba(85,33,184,.15) 0%,transparent 60%)}
.hero-particles{position:absolute;inset:0;pointer-events:none}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px;animation:fadeInUp 1s ease}
.hero-title{font-size:clamp(2.2rem,5vw,3.6rem);color:#fff;font-weight:800;margin-bottom:16px;letter-spacing:4px;text-shadow:0 2px 20px rgba(253,158,1,.35)}
.hero-subtitle{font-size:1.3rem;color:rgba(255,255,255,.8);margin-bottom:12px;letter-spacing:6px}
.hero-desc{font-size:1.05rem;color:rgba(255,255,255,.6);margin-bottom:40px;line-height:1.8}
.btn-primary{display:inline-block;padding:14px 48px;background:linear-gradient(135deg,#5521b8,#fd9e01);color:#fff;border-radius:50px;font-size:.95rem;font-weight:600;letter-spacing:1px;transition:all .35s ease;cursor:pointer;border:none}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(85,33,184,.4)}
.btn-block{width:100%;text-align:center}
.hero-logo{max-width:280px;margin:0 auto 28px;display:block;border-radius:16px;box-shadow:0 8px 40px rgba(253,158,1,.25);animation:fadeInUp 1.2s ease}

/* ============ About ============ */
.about{background:#f8f9ff}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:stretch}
.about-text{display:flex;flex-direction:column;justify-content:center}
.about-text p{font-size:1rem;color:#555;margin-bottom:16px;line-height:1.9}
.about-text p:last-child{margin-bottom:0}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.stat-item{background:#fff;border-radius:16px;padding:32px 20px;text-align:center;box-shadow:0 4px 20px rgba(85,33,184,.08);transition:transform .3s}
.stat-item:hover{transform:translateY(-4px)}
.stat-number{font-size:2.4rem;font-weight:800;color:#5521b8;display:block}
.stat-item span{color:#5521b8;font-weight:700}
.stat-label{display:block;font-size:.9rem;color:#888;margin-top:8px}

/* ============ Services ============ */
.services{background:#fff}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.service-card{background:#fff;border:1px solid rgba(85,33,184,.1);border-radius:20px;padding:40px 32px;text-align:center;transition:all .4s ease;position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,#5521b8,#fd9e01);transform:scaleX(0);transition:transform .4s;transform-origin:center}
.service-card:hover::before{transform:scaleX(1)}
.service-card:hover{transform:translateY(-8px);box-shadow:0 20px 50px rgba(85,33,184,.12)}
.service-icon{width:72px;height:72px;margin:0 auto 24px;background:linear-gradient(135deg,rgba(85,33,184,.08),rgba(253,158,1,.08));border-radius:18px;display:flex;align-items:center;justify-content:center;color:#5521b8}
.service-icon svg{width:40px;height:40px}
.service-card h3{font-size:1.25rem;color:#1a1a2e;margin-bottom:12px}
.service-desc{font-size:.9rem;color:#666;margin-bottom:20px;line-height:1.7;min-height:72px}
.service-features{text-align:left;padding-top:12px;border-top:1px solid #f0f0f5}
.service-features li{font-size:.85rem;color:#555;padding:6px 0;padding-left:20px;position:relative}
.service-features li::before{content:'';position:absolute;left:0;top:14px;width:6px;height:6px;background:#fd9e01;border-radius:50%}

/* ============ Advantages ============ */
.advantages{background:#f8f9ff}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-item{padding:36px 24px;border-radius:16px;background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.04);transition:transform .3s,box-shadow .3s}
.advantage-item:hover{transform:translateY(-4px);box-shadow:0 12px 36px rgba(85,33,184,.1)}
.advantage-num{font-size:2.5rem;font-weight:800;color:rgba(85,33,184,.15);margin-bottom:12px;line-height:1}
.advantage-item h4{font-size:1.1rem;color:#1a1a2e;margin-bottom:10px}
.advantage-item p{font-size:.88rem;color:#666;line-height:1.7}

/* ============ Contact ============ */
.contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:60px;max-width:960px;margin:0 auto}
.contact-info h3{font-size:1.3rem;color:#1a1a2e;margin-bottom:28px;line-height:1.5}
.contact-item{display:flex;align-items:center;gap:14px;margin-bottom:20px;color:#555}
.contact-item svg{flex-shrink:0;color:#5521b8}
.contact-form .form-group{margin-bottom:16px}
.contact-form input,
.contact-form textarea{width:100%;padding:14px 18px;border:1px solid #e0e0e8;border-radius:12px;font-size:.95rem;font-family:inherit;transition:border-color .3s,box-shadow .3s;outline:none;background:#f9f9fc}
.contact-form input:focus,
.contact-form textarea:focus{border-color:#5521b8;box-shadow:0 0 0 3px rgba(85,33,184,.08);background:#fff}
.contact-form textarea{resize:vertical;min-height:120px}

/* ============ Footer ============ */
.footer{background:#1a0a2e;padding:32px 0;text-align:center}
.footer p{color:rgba(255,255,255,.5);font-size:.85rem;margin-bottom:6px}

/* ============ Particles ============ */
.particle{position:absolute;background:rgba(253,158,1,.15);border-radius:50%;animation:floatUp linear infinite}

/* ============ Animations ============ */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes floatUp{0%{transform:translateY(100vh) scale(0);opacity:0}10%{opacity:1}90%{opacity:1}100%{transform:translateY(-10vh) scale(1);opacity:0}}
.reveal{opacity:0;transform:translateY(40px);transition:all .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ============ Responsive ============ */
@media (max-width:992px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .about-stats{grid-template-columns:repeat(4,1fr)}
}

@media (max-width:768px){
  .section{padding:70px 0}
  .section-title{font-size:1.7rem}
  .nav-toggle{display:flex}
  .nav-menu{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:rgba(15,15,35,.98);backdrop-filter:blur(20px);flex-direction:column;justify-content:center;gap:32px;transition:right .4s ease}
  .nav-menu.active{right:0}
  .services-grid{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .advantages-grid{grid-template-columns:1fr;max-width:440px;margin:0 auto}
  .about-stats{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:1.8rem;letter-spacing:2px}
  .hero-subtitle{font-size:1rem;letter-spacing:3px}
  .hero-desc{font-size:.9rem}
  .btn-primary{padding:12px 36px;font-size:.9rem}
  .service-card{padding:30px 24px}
  .contact-form input,.contact-form textarea{padding:12px 14px}
}

@media (max-width:480px){
  .container{padding:0 16px}
  .section{padding:50px 0}
  .section-title{font-size:1.5rem}
  .about-stats{grid-template-columns:1fr 1fr;gap:12px}
  .stat-item{padding:24px 12px}
  .stat-number{font-size:1.8rem}
  .hero-title{font-size:1.6rem}
  .hero-subtitle{font-size:.9rem;letter-spacing:2px}
  .service-card{padding:24px 16px}
  .service-desc{min-height:auto}
}