/* 全局重置与基础 */
*{margin:0;padding:0;box-sizing:border-box}

/* CSS自定义属性（主题变量） */
:root{--primary:#1a3a5c;--primary-light:#2a5a8c;--primary-dark:#0f2440;--secondary:#e8a838;--accent:#f0c060;--bg:#f5f7fa;--bg-card:#ffffff;--text:#1a1a2e;--text-light:#555;--border:#e0e0e0;--shadow:0 4px 20px rgba(0,0,0,0.08);--radius:16px;--radius-sm:8px;--transition:0.3s ease;--gradient:linear-gradient(135deg,#1a3a5c,#2a5a8c);--glass:rgba(255,255,255,0.7);--glass-border:rgba(255,255,255,0.3)}

/* 暗色模式变量覆盖 */
body.dark{--primary:#2a5a8c;--primary-light:#4a7ab0;--primary-dark:#1a3a5c;--secondary:#d49430;--accent:#b87a20;--bg:#121820;--bg-card:#1e2a36;--text:#e0e8f0;--text-light:#a0b0c0;--border:#2a3a4a;--shadow:0 4px 20px rgba(0,0,0,0.4);--gradient:linear-gradient(135deg,#0f2440,#1a3a5c);--glass:rgba(30,42,54,0.8);--glass-border:rgba(255,255,255,0.1)}

/* 基础样式 */
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;transition:background var(--transition),color var(--transition)}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--secondary)}
img,svg{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 头部 Header */
header{background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);position:sticky;top:0;z-index:1000;padding:0 20px;transition:background var(--transition)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;height:70px}
.logo{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:700;color:var(--primary)}
.logo svg{width:40px;height:40px}
.logo span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
nav{display:flex;gap:24px;align-items:center}
nav a{font-size:15px;font-weight:500;color:var(--text);padding:6px 0;position:relative;transition:color var(--transition)}
nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--secondary);transition:width var(--transition)}
nav a:hover::after,nav a.active::after{width:100%}
nav a.active{color:var(--secondary)}
.dark-toggle{background:var(--bg-card);border:1px solid var(--border);border-radius:50%;width:38px;height:38px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;transition:all var(--transition);color:var(--text)}
.dark-toggle:hover{background:var(--secondary);color:#fff;border-color:var(--secondary)}
.mobile-menu-btn{display:none;background:none;border:none;font-size:28px;cursor:pointer;color:var(--text);padding:4px}

/* Hero 区域 */
.hero{position:relative;overflow:hidden;min-height:85vh;display:flex;align-items:center;background:var(--gradient);color:#fff;padding:60px 20px}
.hero-bg{position:absolute;inset:0;opacity:0.15;background:radial-gradient(circle at 20% 50%,#fff 0%,transparent 60%),radial-gradient(circle at 80% 20%,var(--secondary) 0%,transparent 50%);animation:heroShift 12s ease-in-out infinite alternate}
@keyframes heroShift{0%{transform:scale(1) rotate(0deg)}100%{transform:scale(1.1) rotate(2deg)}}
.hero .container{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.hero-text{flex:1;min-width:280px}
.hero-text h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.2;margin-bottom:20px;text-shadow:0 2px 10px rgba(0,0,0,0.3)}
.hero-text p{font-size:clamp(1rem,2vw,1.2rem);opacity:0.9;margin-bottom:30px;max-width:600px}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 36px;border-radius:50px;font-weight:600;font-size:16px;cursor:pointer;transition:all var(--transition);border:none;text-align:center}
.btn-primary{background:var(--secondary);color:#1a1a2e;box-shadow:0 4px 15px rgba(232,168,56,0.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(232,168,56,0.5)}
.btn-outline{background:transparent;border:2px solid rgba(255,255,255,0.6);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff;transform:translateY(-3px)}
.hero-visual{flex:1;min-width:280px;display:flex;justify-content:center}
.hero-visual svg{width:100%;max-width:500px;height:auto;filter:drop-shadow(0 10px 30px rgba(0,0,0,0.2))}

/* Banner 轮播（渐变圆角卡片） */
.banner-carousel{position:relative;overflow:hidden;background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);margin:40px auto;max-width:1100px}
.banner-slides{display:flex;transition:transform 0.6s ease}
.banner-slide{min-width:100%;padding:60px 40px;display:flex;align-items:center;justify-content:center;gap:30px;flex-wrap:wrap;background:var(--gradient);color:#fff}
.banner-slide:nth-child(2){background:linear-gradient(135deg,#2a5a8c,#1a3a5c)}
.banner-slide:nth-child(3){background:linear-gradient(135deg,#1a3a5c,#0f2440)}
.banner-slide-text{flex:1;min-width:200px}
.banner-slide-text h2{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:12px}
.banner-slide-text p{opacity:0.9;font-size:1rem}
.banner-slide svg{width:120px;height:120px;opacity:0.8}
.banner-controls{position:absolute;bottom:20px;right:30px;display:flex;gap:10px;z-index:5}
.banner-dot{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,0.4);cursor:pointer;transition:all var(--transition);border:none}
.banner-dot.active{background:#fff;transform:scale(1.3)}
.banner-prev,.banner-next{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,0.15);backdrop-filter:blur(4px);border:none;color:#fff;font-size:28px;width:44px;height:44px;border-radius:50%;cursor:pointer;transition:all var(--transition);z-index:5;display:flex;align-items:center;justify-content:center}
.banner-prev{left:15px}
.banner-next{right:15px}
.banner-prev:hover,.banner-next:hover{background:rgba(255,255,255,0.3)}

/* 通用区域 */
section{padding:80px 20px}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:clamp(1.8rem,3.5vw,2.8rem);font-weight:700;color:var(--text)}
.section-title p{font-size:1.05rem;color:var(--text-light);margin-top:10px;max-width:600px;margin-left:auto;margin-right:auto}

/* 网格卡片（通用） */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.card{background:var(--bg-card);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition);border:1px solid var(--border);opacity:0;transform:translateY(30px)}
.card.visible{opacity:1;transform:translateY(0)}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,0.12)}
.card-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;background:var(--gradient)}
.card-icon svg{width:28px;height:28px;fill:#fff}
.card h3{font-size:1.3rem;margin-bottom:10px;color:var(--text)}
.card p{color:var(--text-light);font-size:0.95rem;line-height:1.6}

/* 关于/故事/文化 */
.about-content,.story-content,.culture-content{display:flex;gap:40px;align-items:center;flex-wrap:wrap;background:var(--bg-card);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow);border:1px solid var(--border)}
.about-text,.story-text,.culture-text{flex:1;min-width:280px}
.about-text h2,.story-text h2,.culture-text h2{font-size:clamp(1.5rem,2.5vw,2rem);margin-bottom:16px;color:var(--text)}
.about-text p,.story-text p,.culture-text p{margin-bottom:14px;color:var(--text-light)}
.about-visual,.story-visual,.culture-visual{flex:1;min-width:240px;display:flex;justify-content:center}
.about-visual svg,.story-visual svg,.culture-visual svg{width:100%;max-width:400px;height:auto}

/* 团队 */
.team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}
.team-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform var(--transition);opacity:0;transform:translateY(20px)}
.team-card.visible{opacity:1;transform:translateY(0)}
.team-card:hover{transform:translateY(-4px)}
.team-avatar{width:80px;height:80px;border-radius:50%;margin:0 auto 12px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:32px;color:#fff;font-weight:bold}
.team-card h4{font-size:1.1rem;margin-bottom:4px;color:var(--text)}
.team-card p{font-size:0.9rem;color:var(--text-light)}

/* 产品 */
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.product-card{background:var(--bg-card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border);transition:all var(--transition);opacity:0;transform:translateY(20px)}
.product-card.visible{opacity:1;transform:translateY(0)}
.product-card:hover{transform:translateY(-5px);border-color:var(--secondary)}
.product-card .card-icon{background:var(--secondary);color:#1a1a2e}
.product-card h3{font-size:1.2rem;margin-bottom:8px;color:var(--text)}
.product-card p{color:var(--text-light);font-size:0.95rem}

/* 统计 */
.stats{background:var(--gradient);color:#fff;padding:60px 20px;text-align:center}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:30px;max-width:900px;margin:0 auto}
.stat-item h3{font-size:clamp(2rem,4vw,3rem);font-weight:800;margin-bottom:6px}
.stat-item p{font-size:1rem;opacity:0.85}

/* 案例/合作伙伴/评价 */
.case-grid,.partner-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.case-card,.partner-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border:1px solid var(--border);text-align:center;transition:transform var(--transition);opacity:0;transform:translateY(20px)}
.case-card.visible,.partner-card.visible{opacity:1;transform:translateY(0)}
.case-card:hover,.partner-card:hover{transform:translateY(-4px)}
.case-card svg,.partner-card svg{width:60px;height:60px;margin:0 auto 12px;fill:var(--primary-light)}
.case-card h4,.partner-card h4{font-size:1.1rem;margin-bottom:6px;color:var(--text)}
.case-card p,.partner-card p{font-size:0.9rem;color:var(--text-light)}
.testimonial-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.testimonial-card{background:var(--bg-card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border);position:relative;opacity:0;transform:translateY(20px)}
.testimonial-card.visible{opacity:1;transform:translateY(0)}
.testimonial-card::before{content:'\201C';font-size:60px;color:var(--secondary);position:absolute;top:10px;left:20px;opacity:0.3;font-family:serif}
.testimonial-card p{font-style:italic;color:var(--text-light);margin-bottom:16px;padding-top:20px}
.testimonial-card .author{font-weight:600;color:var(--text)}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.news-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform var(--transition);opacity:0;transform:translateY(20px)}
.news-card.visible{opacity:1;transform:translateY(0)}
.news-card:hover{transform:translateY(-4px)}
.news-card .date{font-size:0.85rem;color:var(--text-light);margin-bottom:8px}
.news-card h3{font-size:1.15rem;margin-bottom:8px;color:var(--text)}
.news-card p{font-size:0.95rem;color:var(--text-light)}
.news-card a{color:var(--primary-light);font-weight:500}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius-sm);margin-bottom:12px;border:1px solid var(--border);overflow:hidden;transition:all var(--transition)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1.05rem;color:var(--text);background:var(--bg-card);border:none;width:100%;text-align:left;transition:background var(--transition)}
.faq-question:hover{background:var(--bg)}
.faq-question .icon{font-size:20px;transition:transform var(--transition);color:var(--primary-light)}
.faq-item.open .faq-question .icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px 18px;color:var(--text-light);font-size:0.95rem;display:none;line-height:1.7}
.faq-item.open .faq-answer{display:block}

/* HowTo */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;max-width:900px;margin:0 auto}
.howto-step{background:var(--bg-card);border-radius:var(--radius);padding:28px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border);position:relative;opacity:0;transform:translateY(20px)}
.howto-step.visible{opacity:1;transform:translateY(0)}
.howto-step .step-number{width:44px;height:44px;border-radius:50%;background:var(--secondary);color:#1a1a2e;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 14px}
.howto-step h4{font-size:1.1rem;margin-bottom:8px;color:var(--text)}
.howto-step p{font-size:0.95rem;color:var(--text-light)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:30px}
.contact-info{background:var(--bg-card);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);border:1px solid var(--border)}
.contact-info h3{font-size:1.3rem;margin-bottom:16px;color:var(--text)}
.contact-info p{margin-bottom:10px;color:var(--text-light);display:flex;align-items:center;gap:10px}
.contact-info svg{width:20px;height:20px;fill:var(--primary-light);flex-shrink:0}

/* 页脚 */
footer{background:var(--primary-dark);color:rgba(255,255,255,0.85);padding:50px 20px 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:30px;max-width:1200px;margin:0 auto}
.footer-col h4{font-size:1.1rem;margin-bottom:14px;color:#fff;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--secondary)}
.footer-col a{display:block;color:rgba(255,255,255,0.7);margin-bottom:8px;font-size:0.9rem;transition:color var(--transition)}
.footer-col a:hover{color:var(--secondary)}
.footer-col p{font-size:0.9rem;margin-bottom:6px;color:rgba(255,255,255,0.6)}
.footer-bottom{text-align:center;padding-top:30px;margin-top:30px;border-top:1px solid rgba(255,255,255,0.1);font-size:0.85rem;color:rgba(255,255,255,0.5)}
.footer-bottom a{color:rgba(255,255,255,0.6);margin:0 8px}
.footer-bottom a:hover{color:var(--secondary)}

/* 回到顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;border-radius:50%;background:var(--secondary);color:#1a1a2e;border:none;font-size:22px;cursor:pointer;box-shadow:0 4px 15px rgba(0,0,0,0.2);opacity:0;visibility:hidden;transition:all var(--transition);z-index:999;display:flex;align-items:center;justify-content:center}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,0.3)}

/* 搜索栏 */
.search-bar{display:flex;gap:8px;max-width:400px;margin:20px auto}
.search-bar input{flex:1;padding:12px 18px;border:2px solid var(--border);border-radius:50px;background:var(--bg-card);color:var(--text);font-size:1rem;outline:none;transition:border var(--transition)}
.search-bar input:focus{border-color:var(--secondary)}
.search-bar button{padding:12px 24px;border-radius:50px;background:var(--secondary);color:#1a1a2e;border:none;font-weight:600;cursor:pointer;transition:background var(--transition)}
.search-bar button:hover{background:var(--accent)}

/* 面包屑 */
.breadcrumb{display:flex;gap:8px;font-size:0.9rem;padding:16px 0;color:var(--text-light);max-width:1200px;margin:0 auto;padding-left:20px}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--secondary)}
.breadcrumb span{color:var(--text)}

/* 响应式布局 */
@media(max-width:768px){
    nav{display:none;flex-direction:column;position:absolute;top:70px;left:0;right:0;background:var(--glass);backdrop-filter:blur(20px);padding:20px;border-bottom:1px solid var(--glass-border);gap:16px}
    nav.open{display:flex}
    .mobile-menu-btn{display:block}
    .hero{min-height:60vh;padding:40px 20px}
    .hero-text h1{font-size:1.8rem}
    .hero-buttons .btn{padding:12px 28px;font-size:14px}
    section{padding:50px 20px}
    .about-content,.story-content,.culture-content{padding:24px}
    .banner-slide{padding:30px 20px;flex-direction:column;text-align:center}
    .banner-prev,.banner-next{width:36px;height:36px;font-size:20px}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
    .header-inner{height:60px}
    .logo{font-size:18px}
    .logo svg{width:32px;height:32px}
    .grid,.product-grid,.team-grid,.case-grid,.partner-grid,.testimonial-grid,.news-grid,.howto-steps{grid-template-columns:1fr}
    .stats-grid{grid-template-columns:1fr 1fr}
    .footer-grid{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
}