*{margin:0;padding:0;box-sizing:border-box}

html{scroll-behavior:smooth}

body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#0a0a0a;color:#fff;line-height:1.6;overflow-x:hidden}

a{color:inherit;text-decoration:none}button{font-family:inherit}



/* Layout05 导航样式 */

.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-bottom:1px solid #F5F5F5;padding:0 60px;display:flex;justify-content:space-between;align-items:center;height:72px}

.logo{font-size:22px;font-weight:800;color:#C41E3A}.logo span{color:#1A1A1A}

.nav-links{display:flex;gap:40px;list-style:none}

.nav-links a{color:#666;font-size:14px;font-weight:500;padding:24px 0;display:block;position:relative}

.nav-links a::after{content:"";position:absolute;bottom:18px;left:0;right:0;height:2px;background:#C41E3A;transform:scaleX(0);transition:transform .3s}

.nav-links a:hover{color:#1A1A1A}.nav-links a:hover::after{transform:scaleX(1)}

.nav-item-has-dropdown{position:relative}

.dropdown-menu{position:absolute;top:100%;left:0;min-width:160px;background:#fff;border:1px solid #F5F5F5;border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,.1);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;padding:12px 0;list-style:none;z-index:1001}

.nav-item-has-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}

.dropdown-menu li a{display:block;padding:10px 20px;color:#666;font-size:14px;transition:all .2s}

.dropdown-menu li a:hover{color:#C41E3A;background:rgba(196,30,58,.05)}

.nav-cta{background:#C41E3A;color:#fff;padding:10px 26px;border-radius:50px;font-size:14px;font-weight:600}
/* Hamburger Menu */
.hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;background:none;border:none;cursor:pointer;z-index:1001}
.hamburger span{display:block;width:24px;height:2px;background:#1A1A1A;margin:2px 0;transition:all .3s}
/* Mobile Overlay */
.mobile-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:999;opacity:0;visibility:hidden;transition:all .3s}
.mobile-overlay.active{opacity:1;visibility:visible}
/* Mobile Menu */
.mobile-menu{position:fixed;top:0;right:-100%;width:300px;max-width:85%;height:100%;background:#fff;z-index:1000;box-shadow:-4px 0 20px rgba(0,0,0,.1);transition:right .3s ease;display:flex;flex-direction:column}
.mobile-menu.active{right:0}
.mobile-menu-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid #F5F5F5}
.mobile-menu-logo{font-size:20px;font-weight:700;color:#C41E3A}
.mobile-menu-close{width:40px;height:40px;background:none;border:none;font-size:28px;cursor:pointer;color:#666;display:flex;align-items:center;justify-content:center}
.mobile-menu-links{flex:1;overflow-y:auto;padding:24px 0;list-style:none}
.mobile-menu-links li{border-bottom:1px solid #F5F5F5}
.mobile-menu-links a{display:block;padding:16px 24px;color:#333;font-size:16px;font-weight:500;text-decoration:none;transition:all .2s}
.mobile-menu-links a:hover{color:#C41E3A;background:rgba(196,30,58,.05)}
.mobile-dropdown .mobile-dropdown-menu{display:none;background:#F8F8F8;padding:0}
.mobile-dropdown.open .mobile-dropdown-menu{display:block}
.mobile-dropdown-menu li{border-bottom:1px solid #eee}
.mobile-dropdown-menu a{padding-left:40px;font-size:14px;color:#666}
.dropdown-arrow{display:inline-block;margin-left:8px;transition:transform .2s}
.mobile-dropdown.open .dropdown-arrow{transform:rotate(180deg)}
.mobile-menu-cta{display:block;margin:24px;text-align:center;background:#C41E3A;color:#fff;padding:14px 32px;border-radius:50px;font-size:16px;font-weight:600;text-decoration:none;transition:all .3s}
.mobile-menu-cta:hover{background:#a31830}



/* 全屏章节基础 */

.full-section{height:100vh;min-height:700px;width:100%;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}

.section-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}

.section-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,0,0,.65) 0%,rgba(0,0,0,.5) 50%,rgba(196,30,58,.0) 100%)}

.section-content{position:relative;z-index:2;width:100%;max-width:1400px;padding:0 80px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}



/* 左侧固定导航指示器 */

.side-nav{position:fixed;left:40px;top:50%;transform:translateY(-50%);z-index:100;display:flex;flex-direction:column;gap:20px}

.side-nav-item{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.2);cursor:pointer;transition:all .4s;position:relative}

.side-nav-item::before{content:attr(data-num);position:absolute;left:25px;top:50%;transform:translateY(-50%);font-size:11px;font-weight:600;color:rgba(255,255,255,.5);opacity:0;transition:all .3s;white-space:nowrap}

.side-nav-item:hover::before,.side-nav-item.active::before{opacity:1;color:#fff}

.side-nav-item:hover{background:rgba(255,255,255,.5)}

.side-nav-item.active{background:#C41E3A;box-shadow:0 0 20px rgba(196,30,58,.6);transform:scale(1.3)}

.side-nav-line{position:absolute;left:50%;top:20px;bottom:20px;width:2px;background:rgba(255,255,255,.1);transform:translateX(-50%);z-index:-1}

.side-nav-progress{position:absolute;left:50%;top:0;width:2px;background:#C41E3A;transform:translateX(-50%);transition:height .3s;z-index:-1}



/* 内容区域样式 */

.strength-number{font-size:180px;font-weight:900;color:transparent;-webkit-text-stroke:2px rgba(255,255,255,.15);line-height:1;position:absolute;top:-40px;left:-20px;z-index:-1;transition:all .6s}

.full-section.active .strength-number{color:rgba(196,30,58,.1);-webkit-text-stroke:0}

.strength-label{font-size:13px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:#C41E3A;margin-bottom:16px;display:inline-block;padding:8px 20px;border:1px solid rgba(196,30,58,.5);border-radius:30px;background:rgba(196,30,58,.1)}

.strength-title{font-size:clamp(36px,4vw,56px);font-weight:900;line-height:1.1;margin-bottom:24px;color:#fff}

.strength-title span{color:#C41E3A}

.strength-desc{font-size:18px;color:rgba(255,255,255,.7);line-height:1.9;margin-bottom:40px;max-width:500px}



/* 特性列表 - 横向卡片 */

.feature-list{display:flex;flex-direction:column;gap:16px}

.feature-item{display:flex;align-items:center;gap:20px;padding:20px 24px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:16px;transition:all .4s;backdrop-filter:blur(10px)}

.feature-item:hover{background:rgba(196,30,58,.2);border-color:rgba(196,30,58,.5);transform:translateX(10px)}

.feature-icon{width:50px;height:50px;border-radius:14px;background:#C41E3A;display:flex;align-items:center;justify-content:center;font-size:22px;transition:all .3s}

.feature-item:hover .feature-icon{background:#fff;color:#C41E3A;transform:scale(1.1)}

.feature-text{flex:1}

.feature-title{font-size:17px;font-weight:700;margin-bottom:4px;color:#fff}

.feature-desc{font-size:14px;color:rgba(255,255,255,.6)}



/* 图片区域 - 创意形状 */

.visual-area{position:relative;height:500px;display:flex;align-items:center;justify-content:center}

.visual-frame{position:relative;width:400px;height:400px}

.visual-main{position:absolute;inset:0;border-radius:30px;overflow:hidden;box-shadow:0 30px 60px rgba(0,0,0,.4);transform:scale(0.9);transition:all .6s}

.full-section.active .visual-main{transform:scale(1)}

.visual-main img{width:100%;height:100%;object-fit:cover}

.visual-accent{position:absolute;width:150px;height:150px;border:3px solid #C41E3A;border-radius:20px;right:-30px;bottom:-30px;z-index:-1;animation:pulse 3s infinite}

.visual-dot{position:absolute;width:20px;height:20px;background:#C41E3A;border-radius:50%;left:-40px;top:50px;box-shadow:0 0 30px rgba(196,30,58,.8)}



@keyframes pulse{0%,100%{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:1}}



/* 统计数据悬浮 */

.stats-float{position:absolute;right:0;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:20px}

.stat-item{background:rgba(255,255,255,.1);backdrop-filter:blur(20px);padding:20px 30px;border-radius:16px;border:1px solid rgba(255,255,255,.1);text-align:center;min-width:140px;transition:all .4s}

.stat-item:hover{background:rgba(196,30,58,.3);border-color:rgba(196,30,58,.5);transform:scale(1.05)}

.stat-num{font-size:32px;font-weight:900;color:#C41E3A;display:block}

.stat-label{font-size:12px;color:rgba(255,255,255,.6);margin-top:4px}



/* 第一屏特殊样式 */

.hero-section{height:100vh;background:#0a0a0a;display:flex;align-items:center;justify-content:center;text-align:center;position:relative}

.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:1}

.hero-bg::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(196,30,58,.3) 0%,transparent 70%)}

.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,10,10,.6) 0%,rgba(10,10,10,.0) 50%,rgba(10,10,10,.7) 100%)}

.hero-content{position:relative;z-index:2;max-width:900px;padding:0 40px}

.hero-eyebrow{font-size:14px;font-weight:700;letter-spacing:6px;color:#C41E3A;margin-bottom:30px}

.hero-title{font-size:clamp(48px,8vw,100px);font-weight:900;line-height:1;margin-bottom:30px;color:#fff}

.hero-title span{display:block;color:transparent;-webkit-text-stroke:2px #fff}

.hero-desc{font-size:20px;color:rgba(255,255,255,.6);line-height:1.8;margin-bottom:50px}

.scroll-hint{position:absolute;bottom:40px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;color:rgba(255,255,255,.4);font-size:12px;letter-spacing:2px;animation:bounce 2s infinite}

.scroll-hint::after{content:'↓';font-size:20px}

@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(10px)}}



/* CTA区域 */

.cta-section{background:#C41E3A;color:#fff;text-align:center;padding:100px 80px;position:relative;overflow:hidden}

.cta-section::before{content:'';position:absolute;inset:0;background:url('/images/cta-bg.jpg') center/cover no-repeat;opacity:.1}

.cta-content{position:relative;z-index:2}

.cta-section h2{color:#fff;margin-bottom:20px;font-size:clamp(36px,5vw,60px)}

.cta-section>p{font-size:18px;color:rgba(255,255,255,.7);margin-bottom:32px;position:relative;z-index:2}

.btn{padding:16px 48px;border-radius:50px;font-weight:600;font-size:16px;display:inline-block;border:none;transition:all .3s;background:#fff;color:#C41E3A;position:relative;z-index:2}

.btn:hover{background:#1A1A1A;color:#fff;transform:translateY(-3px);box-shadow:0 10px 30px rgba(0,0,0,.2)}



/* Layout05 页脚 */

footer{padding:40px 80px;border-top:1px solid #222;text-align:center;color:#666;font-size:13px;background:#0a0a0a}



/* 响应式 */

@media(max-width:1200px){

    .section-content{grid-template-columns:1fr;gap:40px;padding:0 40px;text-align:center}

    .full-section{height:auto;min-height:100vh;padding:120px 0}

    .strength-number{font-size:120px;left:50%;transform:translateX(-50%);top:-20px}

    .visual-area{height:350px}

    .visual-frame{width:300px;height:300px}

    .stats-float{position:relative;right:auto;top:auto;transform:none;flex-direction:row;justify-content:center;margin-top:30px}

    .feature-list{max-width:500px;margin:0 auto}

    .strength-desc{margin:0 auto 40px}

    .side-nav{display:none}

}

@media(max-width:1024px){
    .nav-links,.nav-cta{display:none}
    .hamburger{display:flex}
}
@media(max-width:768px){
    .nav{padding:0 24px}
    .nav-links,.nav-cta{display:none}
    .hamburger{display:flex}
    .section-content{padding:0 20px}
    .visual-frame{width:250px;height:250px}
    .visual-accent{width:100px;height:100px;right:-20px;bottom:-20px}
    .stats-float{flex-wrap:wrap}
    .stat-item{min-width:100px;padding:15px 20px}
    .cta-section{padding:80px 20px}
    footer{padding:40px 20px}
}