/* =============================================
   音数传媒官网样式 - 爱马仕橙主题
   ============================================= */
:root{
    --primary:#F36F21;
    --bg-warm:#FCF8F3;
    --bg-linen:#EFE6DC;
    --text-dark:#372820;
    --text-gray:#8C7D6E;
    --blue-gray:#4B6273;
    --gold:#B88E5F;
    --border:#D2C8BC;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text-dark);background:#fff;line-height:1.7;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}

/* ===== 顶部导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(252,248,243,0.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);transition:all .3s;}
.site-header.scrolled{box-shadow:0 2px 20px rgba(55,40,32,.08);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;}
.logo{display:flex;align-items:center;gap:12px;}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--primary);color:#fff;font-size:22px;font-weight:700;border-radius:10px;}
.logo-text{font-size:20px;font-weight:700;color:var(--text-dark);display:flex;flex-direction:column;line-height:1.1;}
.logo-text small{font-size:10px;font-weight:500;color:var(--text-gray);letter-spacing:2px;}
.main-nav{display:flex;gap:36px;}
.main-nav a{font-size:15px;font-weight:500;color:var(--text-dark);position:relative;padding:6px 0;transition:color .3s;}
.main-nav a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:width .3s;}
.main-nav a:hover{color:var(--primary);}
.main-nav a:hover::after{width:100%;}
.nav-toggle{display:none;background:none;border:none;font-size:24px;color:var(--text-dark);cursor:pointer;}

/* ===== 首屏Banner ===== */
.hero{position:relative;height:100vh;min-height:600px;overflow:hidden;}
.hero-slider{position:relative;height:100%;}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1s ease;display:flex;align-items:center;}
.hero-slide.active{opacity:1;z-index:2;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(55,40,32,.75),rgba(55,40,32,.35));}
.hero-content{position:relative;z-index:3;color:#fff;}
.hero-subtitle{font-size:14px;letter-spacing:4px;color:#F0D9C8;margin-bottom:20px;text-transform:uppercase;}
.hero-title{font-size:52px;font-weight:700;line-height:1.3;margin-bottom:24px;max-width:800px;}
.hero-desc{font-size:20px;color:#EFE6DC;font-weight:300;}
.hero-dots{position:absolute;bottom:40px;left:50%;transform:translateX(-50%);display:flex;gap:12px;z-index:5;}
.hero-dots .dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s;}
.hero-dots .dot.active{background:var(--primary);width:30px;border-radius:5px;}
.hero-scroll{position:absolute;bottom:30px;right:40px;color:#fff;font-size:28px;z-index:5;animation:bounce 2s infinite;}
@keyframes bounce{0%,100%{transform:translateY(0);}50%{transform:translateY(10px);}}

/* ===== 通用版块 ===== */
.section{padding:100px 0;}
.section-head{text-align:center;margin-bottom:60px;}
.section-en{font-size:13px;letter-spacing:4px;color:var(--primary);font-weight:600;margin-bottom:12px;text-transform:uppercase;}
.section-title{font-size:36px;font-weight:700;color:var(--text-dark);}
.section-line{width:50px;height:3px;background:var(--primary);margin:18px auto 0;border-radius:2px;}
.section-desc{margin-top:20px;color:var(--text-gray);font-size:16px;}

/* ===== 关于音数 ===== */
.section-about{background:var(--bg-warm);}
.about-body{display:grid;grid-template-columns:1.4fr 1fr;gap:60px;align-items:center;}
.about-text{font-size:16px;color:#5a4a3e;line-height:2;}
.about-features{display:grid;grid-template-columns:1fr;gap:24px;}
.feature-item{background:#fff;padding:28px 32px;border-radius:12px;border-left:4px solid var(--primary);box-shadow:0 4px 20px rgba(55,40,32,.05);display:flex;align-items:baseline;gap:16px;}
.feature-num{font-size:42px;font-weight:700;color:var(--primary);}
.feature-label{font-size:15px;color:var(--text-gray);}

/* ===== 服务项目 ===== */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.service-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:40px 32px;transition:all .35s;position:relative;overflow:hidden;}
.service-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .35s;}
.service-card:hover{transform:translateY(-8px);box-shadow:0 16px 40px rgba(55,40,32,.1);border-color:transparent;}
.service-card:hover::before{transform:scaleX(1);}
.service-icon{font-size:40px;font-weight:800;color:var(--bg-linen);margin-bottom:20px;font-family:Georgia,serif;}
.service-card:hover .service-icon{color:var(--primary);}
.service-card h3{font-size:20px;margin-bottom:14px;color:var(--text-dark);}
.service-card p{font-size:14px;color:var(--text-gray);line-height:1.9;}
.service-card-accent{background:linear-gradient(135deg,var(--primary),var(--gold));border:none;}
.service-card-accent .service-icon,.service-card-accent h3,.service-card-accent p{color:#fff;}
.service-card-accent::before{background:#fff;}

/* ===== 服务理念 ===== */
.section-concept{background:linear-gradient(135deg,var(--text-dark),#4a3628);color:#fff;}
.section-concept .section-title{color:#fff;}
.section-concept .section-en{color:var(--gold);}
.concept-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.concept-item{padding:36px 28px;border:1px solid rgba(255,255,255,.15);border-radius:12px;transition:all .35s;}
.concept-item:hover{background:rgba(243,111,33,.15);border-color:var(--primary);transform:translateY(-6px);}
.concept-item h3{font-size:20px;color:var(--gold);margin-bottom:14px;}
.concept-item:hover h3{color:var(--primary);}
.concept-item p{font-size:14px;color:rgba(255,255,255,.75);line-height:1.9;}

/* ===== 新闻资讯 ===== */
.section-news{background:var(--bg-warm);}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.news-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 20px rgba(55,40,32,.06);transition:all .35s;}
.news-card:hover{transform:translateY(-8px);box-shadow:0 16px 40px rgba(55,40,32,.12);}
.news-cover{height:200px;background-size:cover;background-position:center;background-color:var(--bg-linen);}
.news-body{padding:26px;}
.news-date{font-size:12px;color:var(--gold);letter-spacing:1px;}
.news-title{font-size:18px;margin:10px 0 12px;color:var(--text-dark);line-height:1.5;}
.news-summary{font-size:14px;color:var(--text-gray);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.contact-item{text-align:center;padding:40px 24px;background:var(--bg-warm);border-radius:14px;border:1px solid var(--border);transition:all .3s;}
.contact-item:hover{border-color:var(--primary);transform:translateY(-5px);}
.contact-label{display:block;font-size:13px;color:var(--text-gray);letter-spacing:2px;margin-bottom:12px;}
.contact-value{display:block;font-size:18px;font-weight:600;color:var(--text-dark);}

/* ===== 页脚 ===== */
.site-footer{background:var(--text-dark);color:#fff;padding:60px 0 40px;text-align:center;}
.footer-brand{display:flex;align-items:center;justify-content:center;gap:12px;font-size:20px;font-weight:600;margin-bottom:18px;}
.footer-slogan{color:var(--gold);font-size:15px;margin-bottom:24px;letter-spacing:1px;}
.footer-copy{color:rgba(255,255,255,.5);font-size:13px;}

/* ===== 响应式 ===== */
@media (max-width:992px){
    .about-body{grid-template-columns:1fr;}
    .services-grid,.news-grid{grid-template-columns:repeat(2,1fr);}
    .concept-grid,.contact-grid{grid-template-columns:repeat(2,1fr);}
    .hero-title{font-size:38px;}
}
@media (max-width:768px){
    .main-nav{position:fixed;top:70px;right:0;width:220px;height:calc(100vh - 70px);background:var(--bg-warm);flex-direction:column;gap:0;padding:20px;transform:translateX(100%);transition:transform .3s;box-shadow:-4px 0 20px rgba(0,0,0,.1);}
    .main-nav.open{transform:translateX(0);}
    .main-nav a{padding:14px 0;border-bottom:1px solid var(--border);width:100%;}
    .nav-toggle{display:block;}
    .hero-title{font-size:30px;}
    .hero-desc{font-size:16px;}
    .section{padding:60px 0;}
    .section-title{font-size:28px;}
    .services-grid,.news-grid,.concept-grid,.contact-grid{grid-template-columns:1fr;}
}