/* 关键CSS内联 */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:#f8f9fa;color:#222;line-height:1.6;transition:background 0.3s,color 0.3s}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* 头部 */
header{background:#1a1a2e;color:#fff;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,0.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.logo{font-size:1.8rem;font-weight:700;color:#f0c040;text-decoration:none;transition:transform 0.3s}
.logo:hover{transform:scale(1.05)}
nav ul{display:flex;list-style:none;gap:24px}
nav a{color:#e0e0e0;text-decoration:none;font-size:0.95rem;transition:color 0.2s,transform 0.2s}
nav a:hover{color:#f0c040;transform:translateY(-2px)}
.hamburger{display:none;flex-direction:column;cursor:pointer;background:none;border:none;padding:4px}
.hamburger span{width:28px;height:2px;background:#fff;margin:5px 0;transition:0.3s}
@media(max-width:768px){
    .hamburger{display:flex}
    nav ul{display:none;flex-direction:column;position:absolute;top:60px;left:0;right:0;background:#1a1a2e;padding:20px;gap:12px;z-index:999}
    nav ul.active{display:flex}
}
/* Hero */
.hero{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);color:#fff;padding:80px 0 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(240,192,64,0.1) 0%,transparent 60%);animation:heroGlow 6s ease-in-out infinite}
@keyframes heroGlow{0%,100%{transform:translate(0,0)}50%{transform:translate(10%,10%)}}
.hero h1{font-size:2.8rem;margin-bottom:20px;color:#f0c040;animation:fadeInUp 0.8s ease}
.hero p{font-size:1.2rem;max-width:700px;margin:0 auto 30px;color:#ccc;animation:fadeInUp 0.8s ease 0.2s both}
.hero .btn{display:inline-block;background:#f0c040;color:#1a1a2e;padding:14px 36px;border-radius:30px;font-weight:600;text-decoration:none;transition:0.3s;animation:fadeInUp 0.8s ease 0.4s both}
.hero .btn:hover{background:#e0b030;transform:translateY(-2px);box-shadow:0 8px 20px rgba(240,192,64,0.4)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
/* 通用section */
section{padding:60px 0;transition:background 0.3s}
h2{font-size:2rem;margin-bottom:30px;color:#1a1a2e;text-align:center;transition:color 0.3s}
h3{font-size:1.3rem;margin-bottom:15px;color:#16213e;transition:color 0.3s}
.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 12px rgba(0,0,0,0.06);margin-bottom:20px;transition:0.3s;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.2)}
.card:hover{box-shadow:0 8px 24px rgba(0,0,0,0.1);transform:translateY(-2px);border-color:rgba(240,192,64,0.3)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.about-content,.company-content{max-width:800px;margin:0 auto;text-align:center;font-size:1.05rem;color:#444;transition:color 0.3s}
.story-content{background:#f0f4ff;border-radius:16px;padding:30px;transition:background 0.3s}
/* 列表 */
ul{list-style:disc;padding-left:20px;color:#444;transition:color 0.3s}
li{margin-bottom:8px}
/* FAQ */
.faq-item{border-bottom:1px solid #e0e0e0;padding:14px 0;cursor:pointer;transition:border-color 0.3s}
.faq-question{font-weight:600;font-size:1.05rem;color:#1a1a2e;display:flex;justify-content:space-between;align-items:center;transition:color 0.3s}
.faq-question::after{content:'+';font-size:1.4rem;color:#f0c040;transition:0.3s}
.faq-item.active .faq-question::after{content:'−';transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.3s ease;color:#555;padding-top:8px}
.faq-item.active .faq-answer{max-height:300px}
/* HowTo */
.howto-step{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start;animation:fadeInUp 0.6s ease both}
.howto-step:nth-child(1){animation-delay:0.1s}
.howto-step:nth-child(2){animation-delay:0.2s}
.howto-step:nth-child(3){animation-delay:0.3s}
.howto-step:nth-child(4){animation-delay:0.4s}
.howto-step:nth-child(5){animation-delay:0.5s}
.howto-step .step-num{background:#f0c040;color:#1a1a2e;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0;transition:transform 0.3s}
.howto-step:hover .step-num{transform:scale(1.1)}
/* 文章卡片 */
.article-card .date{color:#888;font-size:0.9rem;margin-bottom:6px;transition:color 0.3s}
.article-card a{color:#0f3460;font-weight:600;text-decoration:none;transition:color 0.3s}
.article-card a:hover{text-decoration:underline;color:#f0c040}
/* 联系 */
.contact-info p{margin-bottom:8px;color:#444;transition:color 0.3s}
/* 页脚 */
footer{background:#1a1a2e;color:#aaa;padding:40px 0;text-align:center}
footer a{color:#f0c040;text-decoration:none;transition:color 0.3s}
footer a:hover{color:#e0b030}
footer .footer-links{display:flex;justify-content:center;flex-wrap:wrap;gap:20px;margin-bottom:20px}
/* 暗黑模式 */
@media(prefers-color-scheme:dark){
    body{background:#121212;color:#e0e0e0}
    .card{background:rgba(30,30,30,0.8);color:#ddd;border-color:rgba(255,255,255,0.1)}
    h2,h3{color:#f0c040}
    .about-content,.company-content,.faq-answer,.contact-info p,.howto-step p{color:#ccc}
    .story-content{background:rgba(26,26,46,0.8)}
    .faq-item{border-color:#333}
    .faq-question{color:#f0c040}
    .article-card .date{color:#666}
    .article-card a{color:#4a9eff}
}
/* 返回顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;background:#f0c040;color:#1a1a2e;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:1.6rem;box-shadow:0 4px 12px rgba(0,0,0,0.2);opacity:0;visibility:hidden;transition:0.3s;border:none;cursor:pointer;z-index:999}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:scale(1.1);box-shadow:0 6px 20px rgba(240,192,64,0.4)}
/* 统计动画 */
.stat-item{text-align:center;padding:20px}
.stat-number{font-size:2.4rem;font-weight:700;color:#f0c040}
.stat-label{color:#888;font-size:0.95rem;transition:color 0.3s}
/* 轮播 */
.carousel{overflow:hidden;position:relative;border-radius:12px;background:#f0f4ff;transition:background 0.3s}
.carousel-track{display:flex;transition:transform 0.5s ease}
.carousel-slide{min-width:100%;padding:40px 20px;text-align:center;background:#f0f4ff;transition:background 0.3s}
.carousel-slide p{font-size:1.1rem;max-width:600px;margin:0 auto;color:#333;transition:color 0.3s}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(26,26,46,0.7);color:#fff;border:none;padding:12px 16px;cursor:pointer;font-size:1.2rem;border-radius:50%;transition:background 0.3s,transform 0.3s}
.carousel-btn:hover{background:rgba(240,192,64,0.9);transform:translateY(-50%) scale(1.1)}
.carousel-btn.prev{left:10px}
.carousel-btn.next{right:10px}
@media(prefers-color-scheme:dark){
    .carousel{background:#1e1e2e}
    .carousel-slide{background:#1e1e2e}
    .carousel-slide p{color:#ccc}
}
/* 滚动动画 - 使用IntersectionObserver在JS中实现，这里仅定义类 */
.scroll-animate{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease,transform 0.6s ease}
.scroll-animate.visible{opacity:1;transform:translateY(0)}
/* 其他 */
#company{background:#f0f4ff;transition:background 0.3s}
#services{background:#f9f9f9;transition:background 0.3s}
#advantages{background:#f0f4ff;transition:background 0.3s}
#case-studies{background:#f9f9f9;transition:background 0.3s}
#howto{background:#f9f9f9;transition:background 0.3s}
@media(prefers-color-scheme:dark){
    #company{background:#1a1a2e}
    #services{background:#1e1e1e}
    #advantages{background:#1a1a2e}
    #case-studies{background:#1e1e1e}
    #howto{background:#1e1e1e}
}