/* ===== 基础重置 ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:#0f172a;color:#e2e8f0;line-height:1.6;overflow-x:hidden}

/* ===== 容器 ===== */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 导航栏 ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;transition:.3s}
.navbar.scrolled{background:rgba(15,23,42,.95);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.3)}
.navbar .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:bold;color:#38bdf8}
.logo i{font-size:28px}
.nav-menu{display:flex;list-style:none;gap:32px}
.nav-menu a{color:#cbd5e1;text-decoration:none;font-size:15px;transition:.2s;padding:4px 0;position:relative}
.nav-menu a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#38bdf8;transition:.2s}
.nav-menu a:hover{color:#38bdf8}
.nav-menu a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer}
.nav-toggle span{width:24px;height:2px;background:#e2e8f0;border-radius:2px;transition:.3s}

/* ===== Banner ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center}
.hero-bg{position:absolute;inset:0;background:linear-gradient(135deg,#0f172a 0%,#1e293b 40%,#0f172a 100%);z-index:-1}
.hero-bg::before{content:'';position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%2338bdf8" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,112C1248,107,1344,117,1392,122.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom/cover no-repeat}
.hero-content{position:relative;z-index:1}
.hero h1{font-size:clamp(32px,5vw,56px);font-weight:800;background:linear-gradient(135deg,#38bdf8,#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}
.hero p{font-size:clamp(16px,2.5vw,20px);color:#94a3b8;margin-bottom:40px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 36px;border-radius:8px;text-decoration:none;font-size:16px;font-weight:600;transition:.3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#38bdf8,#2563eb);color:#fff;box-shadow:0 4px 20px rgba(56,189,248,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(56,189,248,.6)}
.btn-outline{border:1px solid #38bdf8;color:#38bdf8;background:transparent}
.btn-outline:hover{background:#38bdf8;color:#0f172a}

/* ===== 通用区块 ===== */
.section{padding:100px 0}
.section-dark{background:#111827}
.section-header{text-align:center;margin-bottom:60px}
.section-tag{display:inline-block;font-size:12px;letter-spacing:3px;color:#38bdf8;text-transform:uppercase;margin-bottom:8px}
.section-header h2{font-size:32px;color:#f1f5f9;margin-bottom:12px}
.divider{width:60px;height:3px;background:linear-gradient(90deg,#38bdf8,#818cf8);margin:0 auto 16px;border-radius:2px}
.section-desc{color:#94a3b8;font-size:16px}

/* ===== 关于我们 ===== */
.about-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-text p{color:#94a3b8;margin-bottom:16px;font-size:15px;line-height:1.8}
.about-data{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.data-item{text-align:center;background:#1e293b;padding:30px 16px;border-radius:12px;border:1px solid #1e3a5f}
.data-num{font-size:42px;font-weight:800;color:#38bdf8}
.data-plus{font-size:24px;color:#38bdf8;font-weight:700}
.data-desc{display:block;color:#64748b;font-size:14px;margin-top:6px}

/* ===== 服务 ===== */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-item{background:#1e293b;padding:36px 28px;border-radius:12px;text-align:center;transition:.3s;border:1px solid transparent}
.service-item:hover{border-color:#38bdf8;transform:translateY(-4px);box-shadow:0 8px 30px rgba(56,189,248,.15)}
.service-icon{width:64px;height:64px;line-height:64px;margin:0 auto 18px;background:linear-gradient(135deg,#1e3a5f,#0f172a);border-radius:12px;font-size:24px;color:#38bdf8}
.service-item h3{font-size:18px;color:#f1f5f9;margin-bottom:10px}
.service-item p{color:#64748b;font-size:14px;line-height:1.8}

/* ===== 优势 ===== */
.advantages{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-item{background:#1e293b;padding:32px 24px;border-radius:12px;position:relative;overflow:hidden}
.adv-item::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg,#38bdf8,#818cf8)}
.adv-num{font-size:36px;font-weight:800;color:#1e3a5f;margin-bottom:8px}
.adv-item h4{font-size:17px;color:#f1f5f9;margin-bottom:8px}
.adv-item p{color:#64748b;font-size:14px;line-height:1.7}

/* ===== 预约模块 ===== */
.booking-box{display:grid;grid-template-columns:1fr 1fr;gap:40px;max-width:900px;margin:0 auto}
.booking-left{background:#1e293b;padding:36px;border-radius:14px}
.booking-left h3{color:#38bdf8;margin-bottom:20px;font-size:18px}
.booking-left ul{list-style:none}
.booking-left li{color:#94a3b8;margin-bottom:16px;font-size:15px;display:flex;align-items:center;gap:10px}
.booking-left li i{color:#38bdf8;width:20px}
.booking-right{display:flex;flex-direction:column;gap:16px;justify-content:center}
.form-group input{width:100%;padding:14px 16px;background:#1e293b;border:1px solid #334155;border-radius:8px;color:#e2e8f0;font-size:15px;outline:none;transition:.2s}
.form-group input:focus{border-color:#38bdf8;box-shadow:0 0 0 3px rgba(56,189,248,.15)}
.form-row{display:flex;gap:12px}
.flex-1{flex:1}
.btn-code{padding:14px 20px;background:#1e293b;border:1px solid #38bdf8;color:#38bdf8;border-radius:8px;font-size:14px;cursor:pointer;white-space:nowrap;transition:.2s}
.btn-code:hover:not(:disabled){background:#38bdf8;color:#0f172a}
.btn-code:disabled{opacity:.5;cursor:not-allowed}
.btn-submit{width:100%;padding:16px;background:linear-gradient(135deg,#38bdf8,#2563eb);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:.3s}
.btn-submit:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(56,189,248,.4)}
.form-tip{text-align:center;font-size:14px;min-height:22px;transition:.2s}
.form-tip.error{color:#f87171}
.form-tip:not(.error){color:#22c55e}

/* ===== 页脚 ===== */
footer{background:#020617;padding:60px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand h3{font-size:20px;color:#38bdf8;margin-bottom:12px}
.footer-brand p{color:#475569;line-height:1.8}
.footer-links h4,.footer-contact h4{font-size:16px;color:#f1f5f9;margin-bottom:14px}
.footer-links a{display:block;color:#64748b;text-decoration:none;margin-bottom:8px;font-size:14px;transition:.2s}
.footer-links a:hover{color:#38bdf8}
.footer-contact p{color:#64748b;font-size:14px;margin-bottom:8px}
.footer-contact i{color:#38bdf8;margin-right:6px}
.footer-bottom{border-top:1px solid #1e293b;text-align:center;padding-top:24px}
.footer-bottom p{color:#475569;font-size:13px}

/* ===== 回到顶部 ===== */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;line-height:44px;text-align:center;background:#1e293b;border:1px solid #334155;border-radius:8px;cursor:pointer;opacity:0;visibility:hidden;transition:.3s;z-index:999}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:#38bdf8;color:#0f172a}
.back-top i{color:#38bdf8;font-size:16px}
.back-top:hover i{color:#0f172a}

/* ===== 响应式 ===== */
@media(max-width:768px){
    .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:#0f172a;flex-direction:column;padding:20px;gap:16px;border-top:1px solid #1e293b}
    .nav-menu.active{display:flex}
    .nav-toggle{display:flex}
    .about-wrapper{grid-template-columns:1fr}
    .services-grid{grid-template-columns:1fr 1fr}
    .advantages{grid-template-columns:1fr 1fr}
    .booking-box{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
    .services-grid{grid-template-columns:1fr}
    .advantages{grid-template-columns:1fr}
}