/*全局背景 - 海边日落*/
body {
  background: url('images/sanya-beach-sunset.jpg') center center / cover fixed;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(10,10,18,0.20);
  z-index: -1;
}
:root {
  --deep:#0a0a12;--navy:#0d1b2a;--gold:#c9a84c;--gold-l:#dfc278;
  --white:#fff;--bg:#f5f6fa;--text:#1a1a2e;--text-l:#6b7280;
  --font-h:'Noto Serif SC',serif;--font-b:'Noto Sans SC',sans-serif;
  --r:12px;--mw:1200px;--nh:72px;
  --s:0 4px 25px rgba(10,10,18,0.1);
  --sh:0 8px 45px rgba(10,10,18,0.18);
  --sg:0 4px 30px rgba(201,168,76,0.25);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-b);color:var(--text);background:var(--bg);line-height:1.7}
a{color:var(--gold);text-decoration:none;transition:.3s}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{font-family:var(--font-h);line-height:1.3}
.container{max-width:var(--mw);margin:0 auto;padding:0 20px}

/* 导航 */
.navbar{position:fixed;top:0;left:0;right:0;height:var(--nh);background:rgba(10,10,18,0.96);backdrop-filter:blur(16px);z-index:1000;border-bottom:1px solid rgba(201,168,76,0.1)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-h);font-size:1.25rem;font-weight:700;color:var(--gold);letter-spacing:3px}
.nav-brand i{font-size:1.3rem}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu a{padding:8px 16px;font-size:.85rem;color:rgba(255,255,255,.65);border-radius:6px;transition:.25s;letter-spacing:1px}
.nav-menu a:hover,.nav-menu a.active{color:var(--gold);background:rgba(201,168,76,0.08)}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;color:var(--gold);cursor:pointer;padding:8px}

/* Hero */
.hero{margin-top:var(--nh);height:650px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,10,18,0.88),rgba(13,27,42,0.65))}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;max-width:800px;padding:0 20px}
.hero-content h1{font-size:3.5rem;margin-bottom:8px;text-shadow:0 2px 30px rgba(0,0,0,.4);letter-spacing:4px}
.hero-content .sub{font-size:1.3rem;color:var(--gold);margin-bottom:6px;letter-spacing:6px}
.hero-content .desc{font-size:1rem;opacity:.7;margin-bottom:24px;line-height:1.8}
.hero-brands{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:28px}
.hero-brands span{padding:6px 20px;border-radius:20px;font-size:.8rem;background:rgba(201,168,76,0.12);color:var(--gold-l);border:1px solid rgba(201,168,76,0.15);letter-spacing:1px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 34px;border-radius:6px;font-family:var(--font-b);font-size:.95rem;font-weight:600;border:none;cursor:pointer;transition:.3s;text-decoration:none}
.btn-p{background:linear-gradient(135deg,var(--gold),var(--gold-l));color:var(--deep)}
.btn-p:hover{transform:translateY(-2px);box-shadow:var(--sg)}
.btn-o{background:transparent;border:2px solid var(--gold);color:var(--gold)}
.btn-o:hover{background:var(--gold);color:var(--deep)}
.btn-sm{padding:10px 22px;font-size:.82rem}

/* 区块 */
.section{padding:80px 0}
.section-alt{background:rgba(255,255,255,0.92);backdrop-filter:blur(8px)}
.st{text-align:center;font-size:2rem;color:var(--navy);margin-bottom:8px}
.st-sub{text-align:center;color:var(--text-l);font-size:.95rem;margin-bottom:48px}

/* 车型 */
.car-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.car-card{background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-radius:var(--r);overflow:hidden;box-shadow:var(--s);transition:.4s;position:relative}
.car-card:hover{transform:translateY(-6px);box-shadow:var(--sh)}
.car-card .img-w{height:220px;overflow:hidden;position:relative}
.car-card .img-w img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.car-card:hover .img-w img{transform:scale(1.08)}
.car-card .badge{position:absolute;top:14px;left:14px;padding:4px 14px;border-radius:20px;font-size:.72rem;background:var(--gold);color:var(--deep);font-weight:600;letter-spacing:1px}
.car-card .bd{padding:22px}
.car-card .bd h3{font-size:1.1rem;margin-bottom:2px}
.car-card .bd .brand{font-size:.78rem;color:var(--text-l);margin-bottom:8px}
.car-card .bd .info{font-size:.82rem;color:var(--text-l);margin-bottom:8px;display:flex;gap:12px}
.car-card .bd .info i{color:var(--gold);width:16px}
.car-card .bd .price{font-family:var(--font-h);font-size:1.25rem;font-weight:700;color:#c94700;display:flex;justify-content:space-between;align-items:center}
.car-card .bd .price small{font-size:.75rem;font-weight:400;color:var(--text-l)}
.car-card .bd .price .btn{font-family:var(--font-b)}

/* 特色 */
.fg{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.fc{text-align:center;padding:30px 20px;background:rgba(255,255,255,0.9);backdrop-filter:blur(8px);border-radius:var(--r);box-shadow:var(--s)}
.fc i{font-size:2.2rem;color:var(--gold);margin-bottom:12px}
.fc h4{font-size:1rem;margin-bottom:8px}
.fc p{font-size:.85rem;color:var(--text-l)}

/* 流程 */
.steps{display:flex;justify-content:center;gap:0;max-width:900px;margin:0 auto}
.step{flex:1;text-align:center;position:relative;padding:0 10px}
.step:not(:last-child)::after{content:'';position:absolute;top:28px;left:60%;right:-20%;height:2px;background:linear-gradient(90deg,var(--gold),var(--gold-l))}
.step-icon{width:56px;height:56px;border-radius:50%;background:rgba(201,168,76,0.08);color:var(--gold);display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin:0 auto 12px;position:relative;z-index:2;border:2px solid var(--gold)}
.step h4{font-size:.9rem;margin-bottom:4px}
.step p{font-size:.8rem;color:var(--text-l)}

/* 评价 */
.rc{background:var(--white);border-radius:var(--r);padding:24px;box-shadow:var(--s);margin-bottom:16px}
.rc .hd{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.rc .av{width:44px;height:44px;border-radius:50%;background:var(--gold);color:var(--deep);display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;flex-shrink:0}
.rc .nm{font-weight:600;font-size:.9rem}
.rc .dt{font-size:.78rem;color:var(--text-l)}
.rc .tx{font-size:.88rem;color:var(--text);line-height:1.8}
.stars{color:var(--gold);letter-spacing:2px}

/* 表单 */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.85rem;font-weight:500;color:var(--text);margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-family:var(--font-b);font-size:.9rem;transition:border-color .3s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,168,76,0.12)}
.form-group textarea{min-height:100px;resize:vertical}

/* CTA */
.cta{background:linear-gradient(135deg,var(--navy),#0a1628);color:#fff;text-align:center;padding:60px 20px;border-radius:var(--r);margin:40px 0;border:1px solid rgba(201,168,76,0.15)}
.cta h2{font-size:1.8rem;margin-bottom:10px;color:var(--gold)}
.cta p{opacity:.75;margin-bottom:24px}
.cta .btn{background:var(--gold);color:var(--deep)}

/* 底部 */
.footer{background:var(--deep);color:rgba(255,255,255,.6);padding:60px 0 30px;margin-top:60px}
.footer h4{color:var(--gold);font-size:1rem;margin-bottom:16px}
.footer a{color:rgba(255,255,255,.55)}
.footer a:hover{color:var(--gold)}
.ftg{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.ftb{margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.06);text-align:center;font-size:.8rem;color:rgba(255,255,255,.3)}

/* 响应式 */
@media(max-width:1024px){
  .car-grid{grid-template-columns:repeat(2,1fr)}
  .fg{grid-template-columns:repeat(2,1fr)}
  .ftg{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:var(--nh);left:0;right:0;background:rgba(10,10,18,0.98);flex-direction:column;padding:16px}
  .nav-menu.open{display:flex}
  .nav-toggle{display:block}
  .hero{height:480px}
  .hero-content h1{font-size:2rem}
  .car-grid{grid-template-columns:1fr}
  .fg{grid-template-columns:1fr 1fr}
  .steps{flex-direction:column;gap:16px}
  .step:not(:last-child)::after{display:none}
  .step{display:flex;gap:14px;text-align:left;align-items:center}
  .step-icon{margin:0}
  .ftg{grid-template-columns:1fr}
}
@media(max-width:375px){
  .hero{height:400px}
  .hero-content h1{font-size:1.5rem}
  .fg{grid-template-columns:1fr}
}