/* 基础样式 */
:root{
  --bg:#0b0d12;           /* 背景深色 */
  --card:#121621;         /* 卡片底色 */
  --text:#e6e8ef;         /* 文字浅色 */
  --muted:#b7bcc9;        /* 次要文字 */
  --primary:#4f8cff;      /* 品牌主色 */
  --accent:#11d69a;       /* 强调色 */
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,PingFang SC,Hiragino Sans GB,"Microsoft YaHei",Noto Sans CJK SC,sans-serif;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1160px,92%);margin-inline:auto}

/* 粒子背景 */
.particles{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:-1}
.particle{position:absolute;width:2px;height:2px;background:rgba(79,140,255,.3);border-radius:50%;animation:float 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0px) rotate(0deg);opacity:1}50%{transform:translateY(-20px) rotate(180deg);opacity:.5}}

/* 滚动动画 */
.fade-in{opacity:0;transform:translateY(30px);transition:all .8s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}
.slide-left{opacity:0;transform:translateX(-50px);transition:all .8s ease}
.slide-left.visible{opacity:1;transform:translateX(0)}
.slide-right{opacity:0;transform:translateX(50px);transition:all .8s ease}
.slide-right.visible{opacity:1;transform:translateX(0)}

/* 头部导航 */
.site-header{position:sticky;top:0;background:rgba(11,13,18,.7);backdrop-filter:saturate(180%) blur(10px);z-index:10;border-bottom:1px solid rgba(255,255,255,.06);transition:all .3s ease}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{font-weight:700;letter-spacing:.5px;position:relative;overflow:hidden;font-size:18px;background:linear-gradient(45deg,var(--text),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;transition:all .4s ease;cursor:pointer}
.brand::before{content:'';position:absolute;top:-2px;left:-2px;right:-2px;bottom:-2px;background:linear-gradient(45deg,rgba(79,140,255,.2),rgba(17,214,154,.2));border-radius:8px;opacity:0;transition:all .4s ease;z-index:-1}
.brand:hover{transform:scale(1.05);text-shadow:0 0 15px rgba(79,140,255,.5)}
.brand:hover::before{opacity:1;transform:scale(1.1)}
nav{display:flex;align-items:center;padding:8px 12px;background:rgba(79,140,255,.08);border-radius:16px;backdrop-filter:blur(10px);border:1px solid rgba(79,140,255,.15)}
nav a{margin:0 4px;opacity:.9;position:relative;transition:all .3s cubic-bezier(0.25,0.46,0.45,0.94);font-weight:500;padding:12px 16px;border-radius:12px;overflow:hidden;cursor:pointer;transform-origin:top center}
nav a::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(79,140,255,.02),rgba(17,214,154,.02));border-radius:12px;opacity:0;transition:all .3s ease;z-index:-1}
nav a:hover{opacity:1;color:var(--primary);transform:scale(1.3) translateY(8px);text-shadow:0 0 20px rgba(79,140,255,.6);z-index:10}
nav a:hover::before{opacity:1}
nav a:hover + a{transform:scale(1.15) translateY(4px)}
nav a:has(+ a:hover){transform:scale(1.15) translateY(4px)}
nav:hover a:not(:hover){transform:scale(0.9);opacity:.6}
/* 语言选择器 */
.lang-selector{position:relative}
.lang-toggle{padding:8px 12px;border:1px solid rgba(255,255,255,.2);border-radius:8px;background:transparent;color:var(--text);cursor:pointer;font-size:13px;transition:all .2s ease;display:flex;align-items:center;gap:6px}
.lang-toggle:hover{background:rgba(255,255,255,.1);border-color:var(--primary)}
.lang-current{font-weight:500}
.lang-arrow{font-size:10px;transition:transform .2s ease}
.lang-selector.open .lang-arrow{transform:rotate(180deg)}

/* 弹出菜单 */
.lang-menu{position:absolute;top:100%;right:0;margin-top:4px;background:var(--card);border:1px solid rgba(255,255,255,.15);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.3);min-width:140px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all .2s ease;z-index:100}
.lang-selector.open .lang-menu{opacity:1;visibility:visible;transform:translateY(0)}
.lang-option{padding:10px 12px;cursor:pointer;transition:background .2s ease;display:flex;align-items:center;gap:8px;font-size:13px}
.lang-option:hover{background:rgba(255,255,255,.08)}
.lang-option.active{background:rgba(79,140,255,.15);color:var(--primary)}
.lang-flag{font-size:16px}

/* Hero */
.hero{padding:64px 0;background:radial-gradient(1200px 400px at 70% -10%, rgba(79,140,255,.18), transparent);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 20% 80%, rgba(79,140,255,.15) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(17,214,154,.15) 0%, transparent 50%), radial-gradient(circle at 40% 40%, rgba(79,140,255,.08) 0%, transparent 50%);animation:floatBg 8s ease-in-out infinite}
@keyframes floatBg{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-10px,-5px) scale(1.05)}}
.hero-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center;position:relative;z-index:1}
.hero-text{transition:all .4s ease}
.hero-text:hover{transform:translateX(10px)}
.hero h1{font-size:40px;line-height:1.15;margin:0 0 12px;background:linear-gradient(45deg,var(--text),var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:textShine 3s ease-in-out infinite;transition:all .3s ease}
.hero h1:hover{transform:scale(1.02);text-shadow:0 0 20px rgba(79,140,255,.3)}
@keyframes textShine{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero p{color:var(--muted);margin:0 0 20px;transition:all .3s ease}
.hero p:hover{color:var(--text);transform:translateX(5px)}
.hero-media{transition:all .5s ease;position:relative}
.hero-media::before{content:'';position:absolute;top:-20px;left:-20px;right:-20px;bottom:-20px;background:linear-gradient(45deg,rgba(79,140,255,.1),rgba(17,214,154,.1));border-radius:20px;opacity:0;transition:opacity .5s ease;z-index:-1}
.hero-media:hover::before{opacity:1}
.hero-media:hover{transform:scale(1.05) rotate(2deg)}
.hero-media img{transition:all .5s ease;border-radius:12px}
.hero-media:hover img{transform:scale(1.1);filter:brightness(1.1) contrast(1.1)}
.cta-group{display:flex;gap:12px}
.btn{padding:12px 18px;border:1px solid rgba(255,255,255,.12);border-radius:10px;display:inline-block;position:relative;overflow:hidden;transition:all .3s ease}
.btn::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left .6s ease}
.btn:hover::before{left:100%}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(79,140,255,.3)}
.btn.primary{background:linear-gradient(135deg,var(--primary),#7aa6ff);border:0;color:#0b1020;font-weight:700}
.btn.primary:hover{box-shadow:0 8px 30px rgba(79,140,255,.5);transform:translateY(-3px) scale(1.02)}

/* Features */
.features{padding:56px 0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px;position:relative;overflow:hidden;transition:all .4s ease;cursor:pointer}
.card::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(45deg,transparent,rgba(79,140,255,.05),transparent);transform:translateX(-100%);transition:transform .6s ease}
.card:hover::before{transform:translateX(100%)}
.card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 15px 40px rgba(79,140,255,.2);border-color:rgba(79,140,255,.3)}
.card h3{margin:0 0 8px;position:relative;z-index:1}
.card p{margin:0;color:var(--muted);position:relative;z-index:1}

/* Specs */
.specs{padding:56px 0;background:linear-gradient(180deg,rgba(17,214,154,.06),transparent)}
.specs h2{margin-top:0}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:16px}
.spec-item{display:flex;justify-content:space-between;background:var(--card);padding:12px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.06);transition:all .3s ease;position:relative;overflow:hidden}
.spec-item::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(17,214,154,.1),transparent);transform:translateX(-100%);transition:transform .5s ease}
.spec-item:hover::before{transform:translateX(100%)}
.spec-item:hover{transform:translateX(5px);border-color:rgba(17,214,154,.3);box-shadow:0 4px 15px rgba(17,214,154,.1)}
.spec-item span{color:var(--muted);position:relative;z-index:1}
.spec-item strong{position:relative;z-index:1}

/* Gallery */
.gallery{padding:56px 0}
.gallery-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.gallery figure{margin:0;background:var(--card);border-radius:12px;border:1px solid rgba(255,255,255,.06);overflow:hidden;transition:all .4s ease;position:relative}
.gallery figure::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(45deg,rgba(79,140,255,.1),rgba(17,214,154,.1));opacity:0;transition:opacity .4s ease;z-index:1}
.gallery figure:hover::before{opacity:1}
.gallery figure:hover{transform:scale(1.05) rotate(1deg);box-shadow:0 20px 50px rgba(79,140,255,.3)}
.gallery figure img{transition:transform .4s ease}
.gallery figure:hover img{transform:scale(1.1)}

/* Contact */
.contact{padding:56px 0;background:radial-gradient(800px 300px at 20% 0%, rgba(17,214,154,.08), transparent)}
.contact-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:start}
.list{padding-left:16px}
.list li{margin:6px 0;color:var(--muted);transition:all .3s ease}
.list li:hover{color:var(--primary);transform:translateX(5px)}
.form{display:grid;gap:12px;background:var(--card);padding:18px;border-radius:12px;border:1px solid rgba(255,255,255,.06);position:relative;overflow:hidden}
.form::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(79,140,255,.02),rgba(17,214,154,.02));opacity:0;transition:opacity .4s ease}
.form:hover::before{opacity:1}
.form label{font-size:14px;color:var(--muted);margin-bottom:6px;transition:color .3s ease}
.form input,.form textarea{padding:10px 12px;border-radius:8px;border:1px solid rgba(255,255,255,.12);background:#0f1320;color:var(--text);margin-bottom:12px;transition:all .3s ease;position:relative;z-index:1}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(79,140,255,.2);transform:translateY(-2px)}
.form input:focus + label,.form textarea:focus + label{color:var(--primary)}
.form button{cursor:pointer;margin-top:6px;position:relative;z-index:1}
.form-tip{margin:6px 0 0;color:var(--muted);font-size:12px;position:relative;z-index:1}

/* 页脚 */
.site-footer{padding:28px 0;border-top:1px solid rgba(255,255,255,.06);color:var(--muted)}

/* 响应式 */
@media (max-width: 980px){
  .hero-wrap{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:1fr}
  .contact-wrap{grid-template-columns:1fr}
  
  /* 移动端导航 */
  .nav{flex-wrap:wrap;gap:12px}
  nav{display:flex;flex-wrap:wrap;align-items:center}
  nav a{margin-left:12px;font-size:14px}
  
  /* 移动端语言选择器 */
  .lang-toggle{padding:6px 10px;font-size:12px}
  .lang-menu{min-width:120px;right:-10px}
  .lang-option{padding:8px 10px;font-size:12px}
}