/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#ffffff;--bg2:#f0fdf4;--bg3:#f8fafc;--ink:#0f172a;--ink2:#1e293b;
  --muted:#64748b;--muted2:#94a3b8;--rule:#e2e8f0;--accent:#003366;--accent-dark:#003366;
  --accent-light:#dcfce7;--accent2:#3b82f6;--accent2-dark:#003366;--accent2-light:#dbeafe;
  --warn:#f59e0b;
  --shadow:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -1px rgba(0,0,0,.04);
  --shadow-lg:0 10px 30px -3px rgba(0,0,0,.1),0 4px 10px -2px rgba(0,0,0,.05);
  --shadow-green:0 8px 30px -5px rgba(34,197,94,.3);
  --radius:12px;--radius-lg:20px;--radius-xl:28px;--container:1200px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.7;color:var(--ink);background:var(--bg);overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ===== Container ===== */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:50px;font-size:16px;font-weight:700;
  transition:all .3s ease;white-space:nowrap;cursor:pointer;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-green);}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 12px 35px -5px rgba(34,197,94,.4);}
.btn-outline{background:transparent;color:var(--ink);border:2px solid var(--rule);}
.btn-outline:hover{border-color:var(--accent);color:var(--accent-dark);background:var(--bg2);}
.btn-lg{padding:18px 40px;font-size:18px}
.btn-sm{padding:10px 22px;font-size:14px}

/* ===== Section ===== */
.section{padding:80px 0}
.section-header{text-align:center;max-width:700px;margin:0 auto 56px}
.section-tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent-light);color:var(--accent-dark);
  padding:6px 16px;border-radius:50px;font-size:14px;font-weight:600;margin-bottom:16px;
}
.section-title{font-size:36px;font-weight:800;color:var(--ink);line-height:1.3;margin-bottom:12px;}
.section-subtitle{font-size:17px;color:var(--muted);line-height:1.6;}

/* ===== Navigation ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--rule);transition:all .3s ease;
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:72px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{font-size:24px;font-weight:800;display:flex;align-items:center;gap:8px;color:var(--ink);}
.nav-logo .logo-emoji{width:36px;height:36px;border-radius:8px;object-fit:cover}
.nav-menu{display:flex;align-items:center;gap:36px;}
.nav-menu a{font-size:15px;font-weight:500;color:var(--ink2);transition:color .2s;position:relative;}
.nav-menu a:hover{color:var(--accent-dark)}
.nav-menu a.active{color:var(--accent-dark)}
.nav-menu a.active::after{
  content:'';position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.nav-toggle{
  display:none;width:44px;height:44px;flex-direction:column;
  justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{width:24px;height:3px;background:var(--ink);border-radius:3px;transition:all .3s;}
.nav-toggle.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{padding:120px 0 80px;background:linear-gradient(160deg,#f0fdf4 0%,#ecfdf5 40%,#eff6ff 100%);position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;top:-100px;right:-100px;width:500px;height:500px;background:radial-gradient(circle,rgba(34,197,94,.12) 0%,transparent 70%);border-radius:50%;}
.hero::after{content:'';position:absolute;bottom:-150px;left:-100px;width:400px;height:400px;background:radial-gradient(circle,rgba(59,130,246,.1) 0%,transparent 70%);border-radius:50%;}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--accent-light);padding:8px 18px;border-radius:50px;font-size:14px;font-weight:600;color:var(--accent-dark);margin-bottom:24px;box-shadow:var(--shadow);}
.hero h1{font-size:52px;font-weight:800;line-height:1.25;color:var(--ink);margin-bottom:20px;}
.hero h1 .highlight{color:var(--accent-dark);position:relative;}
.hero h1 .highlight::after{content:'';position:absolute;bottom:4px;left:0;right:0;height:10px;background:var(--accent-light);z-index:-1;border-radius:4px;}
.hero-desc{font-size:18px;color:var(--muted);line-height:1.7;margin-bottom:32px;max-width:520px;}
.hero-cta{display:flex;gap:16px;margin-bottom:40px;flex-wrap:wrap;}
.hero-mini-stats{display:flex;gap:32px;flex-wrap:wrap;}
.hero-mini-stat .num{font-size:28px;font-weight:800;color:var(--accent-dark);}
.hero-mini-stat .label{font-size:14px;color:var(--muted);}
.hero-visual{position:relative;display:flex;justify-content:center;align-items:center;}
.phone-mockup{
  width:280px;height:560px;background:var(--ink);border-radius:40px;padding:12px;
  box-shadow:0 25px 60px -10px rgba(0,0,0,.25),0 0 0 2px rgba(255,255,255,.1);position:relative;z-index:2;
}
.phone-mockup::before{content:'';position:absolute;top:18px;left:50%;transform:translateX(-50%);width:100px;height:6px;background:#333;border-radius:6px;z-index:3;}
.phone-screen{width:100%;height:100%;background:linear-gradient(180deg,#f0fdf4 0%,#fff 30%);border-radius:30px;overflow:hidden;padding:36px 16px 16px;display:flex;flex-direction:column;gap:12px;}
.phone-header{text-align:center;font-size:14px;font-weight:700;color:var(--ink);margin-bottom:4px;}
.phone-balance{background:linear-gradient(135deg,var(--accent),var(--accent-dark));border-radius:16px;padding:16px;color:#fff;text-align:center;}
.phone-balance .bal-label{font-size:12px;opacity:.85}
.phone-balance .bal-amount{font-size:28px;font-weight:800;margin-top:4px}
.phone-task-item{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:12px;display:flex;align-items:center;gap:10px;box-shadow:0 2px 8px rgba(0,0,0,.04);}
.phone-task-item .task-emoji{font-size:22px}
.phone-task-item .task-info{flex:1}
.phone-task-item .task-name{font-size:13px;font-weight:600;color:var(--ink)}
.phone-task-item .task-reward{font-size:15px;font-weight:800;color:var(--accent-dark)}
.float-card{
  position:absolute;background:#fff;border-radius:14px;padding:10px 16px;
  box-shadow:var(--shadow-lg);font-size:14px;font-weight:600;display:flex;align-items:center;gap:8px;z-index:3;
  animation:floatAnim 3s ease-in-out infinite;
}
.float-card.fc1{top:8%;right:-10px;animation-delay:0s}
.float-card.fc2{bottom:20%;left:-20px;animation-delay:1s}
.float-card.fc3{bottom:5%;right:10px;animation-delay:2s}
@keyframes floatAnim{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ===== Stats Bar ===== */
.stats-bar{background:linear-gradient(135deg,var(--bg2),var(--accent2-light));padding:48px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;}
.stat-item .stat-num{font-size:42px;font-weight:800;color:var(--accent-dark);line-height:1;}
.stat-item .stat-label{font-size:15px;color:var(--muted);margin-top:8px;}

/* ===== Task Categories ===== */
.task-cats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.task-cat-card{
  background:var(--bg);border:1px solid var(--rule);border-radius:var(--radius-lg);padding:32px 24px;
  text-align:center;transition:all .3s ease;position:relative;overflow:hidden;
}
.task-cat-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));transform:scaleX(0);transition:transform .3s ease;
}
.task-cat-card:hover{border-color:var(--accent);transform:translateY(-6px);box-shadow:var(--shadow-lg);}
.task-cat-card:hover::before{transform:scaleX(1)}
.task-cat-card .cat-emoji{font-size:48px;margin-bottom:16px;display:block;}
.task-cat-card .cat-name{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.task-cat-card .cat-reward{font-size:16px;font-weight:800;color:var(--accent-dark);margin-bottom:8px;}
.task-cat-card .cat-desc{font-size:14px;color:var(--muted);line-height:1.5;}

/* ===== How It Works ===== */
.how-it-works{background:var(--bg3);}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
.steps-grid::before{
  content:'';position:absolute;top:40px;left:12%;right:12%;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:.2;z-index:0;
}
.step-card{text-align:center;position:relative;z-index:1;}
.step-num{
  width:80px;height:80px;border-radius:50%;background:#fff;border:3px solid var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:36px;
  margin:0 auto 20px;box-shadow:var(--shadow);transition:transform .3s;
}
.step-card:hover .step-num{transform:scale(1.1) rotate(5deg)}
.step-card .step-title{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.step-card .step-desc{font-size:14px;color:var(--muted);line-height:1.6;padding:0 12px;}

/* ===== Advantages ===== */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.adv-card{background:var(--bg);border:1px solid var(--rule);border-radius:var(--radius-lg);padding:36px 28px;transition:all .3s ease;}
.adv-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.adv-icon{width:64px;height:64px;border-radius:16px;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:32px;margin-bottom:20px;}
.adv-card:nth-child(2) .adv-icon{background:var(--accent2-light)}
.adv-card:nth-child(4) .adv-icon{background:var(--accent2-light)}
.adv-card:nth-child(6) .adv-icon{background:var(--accent2-light)}
.adv-card .adv-title{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px;}
.adv-card .adv-desc{font-size:15px;color:var(--muted);line-height:1.6;}

/* ===== Earnings Showcase ===== */
.earnings-section{background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%);}
.earnings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.earning-card{
  background:#fff;border-radius:var(--radius-lg);padding:40px 32px;text-align:center;
  border:2px solid transparent;transition:all .3s ease;box-shadow:var(--shadow);
}
.earning-card:hover{border-color:var(--accent);transform:translateY(-6px);box-shadow:var(--shadow-lg);}
.earning-card .earning-emoji{font-size:56px;margin-bottom:16px;}
.earning-card .earning-role{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:12px;}
.earning-card .earning-amount{font-size:32px;font-weight:800;color:var(--accent-dark);margin-bottom:12px;}
.earning-card .earning-amount .unit{font-size:16px;font-weight:600}
.earning-card .earning-desc{font-size:15px;color:var(--muted);line-height:1.6;}

/* ===== Testimonials ===== */
.testi-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.testi-card{background:var(--bg);border:1px solid var(--rule);border-radius:var(--radius-lg);padding:32px;display:flex;gap:20px;transition:all .3s ease;}
.testi-card:hover{border-color:var(--accent);box-shadow:var(--shadow-lg);}
.testi-avatar{width:56px;height:56px;border-radius:50%;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0;}
.testi-card:nth-child(2) .testi-avatar{background:var(--accent2-light)}
.testi-card:nth-child(3) .testi-avatar{background:var(--accent2-light)}
.testi-content{flex:1}
.testi-card .testi-text{font-size:15px;color:var(--ink2);line-height:1.7;margin-bottom:12px;}
.testi-card .testi-name{font-size:15px;font-weight:700;color:var(--ink);}
.testi-card .testi-role{font-size:13px;color:var(--muted);}
.testi-stars{color:var(--warn);font-size:16px;margin-bottom:8px}

/* ===== FAQ ===== */
.faq-list{max-width:760px;margin:0 auto;}
.faq-item{border:1px solid var(--rule);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;transition:all .3s;}
.faq-item:hover{border-color:var(--accent)}
.faq-item.active{border-color:var(--accent);box-shadow:var(--shadow)}
.faq-question{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);text-align:left;transition:background .2s;
}
.faq-question:hover{background:var(--bg2)}
.faq-icon{font-size:24px;transition:transform .3s;color:var(--accent);flex-shrink:0;margin-left:16px;}
.faq-item.active .faq-icon{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;padding:0 24px;}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 20px;}
.faq-answer p{font-size:15px;color:var(--muted);line-height:1.7;}

/* ===== Footer ===== */
.footer{background:var(--ink);color:var(--muted2);padding:60px 0 24px;}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  margin-bottom:40px;
  text-align:center; /* 桌面端整体居中 */
}
.footer-brand{
  text-align:center !important; /* 强制品牌区居中 */
}
.footer-brand .footer-logo{
  font-size:24px;font-weight:800;color:#fff;margin-bottom:12px;
  display:flex !important;align-items:center;justify-content:center !important;gap:8px; /* 强制logo居中 */
}
.footer-brand .footer-logo .logo-emoji{width:32px;height:32px;border-radius:8px;object-fit:cover}
.footer-brand p{
  font-size:14px;line-height:1.7;color:var(--muted2);
  max-width:320px;margin:0 auto !important; /* 强制描述居中 */
}
.footer-col{
  text-align:center !important; /* 强制所有列内容居中 */
}
.footer-col h4{
  font-size:16px;font-weight:700;color:#fff;margin-bottom:16px;
}
.footer-col ul{
  text-align:center !important; /* 强制列表居中 */
  padding:0 !important; /* 清除默认padding */
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul li a{
  font-size:14px;color:var(--muted2);transition:color .2s;display:inline-block !important;
}
.footer-col ul li a:hover{color:var(--accent)}
.footer-social{
  display:flex !important;justify-content:center !important;gap:12px;margin-top:16px; /* 强制社交图标居中 */
}
.footer-social span{
  width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;font-size:20px;
  transition:all .2s;cursor:pointer;
}
.footer-social span:hover{background:var(--accent);transform:translateY(-3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding-top:24px;
  text-align:center !important;font-size:13px;color:var(--muted2); /* 强制底部版权居中 */
}
.footer-bottom a{color:var(--muted2)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== Scroll Animations ===== */
.animate-on-scroll{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease;}
.animate-on-scroll.visible{opacity:1;transform:translateY(0);}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .hero h1{font-size:42px}
  .task-cats{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .section-title{font-size:28px}
  .section-subtitle{font-size:15px}
  .nav-menu{
    position:fixed;top:72px;left:0;right:0;background:#fff;
    flex-direction:column;padding:24px;gap:16px;
    border-bottom:1px solid var(--rule);box-shadow:var(--shadow-lg);
    transform:translateY(-150%);transition:transform .3s ease;
  }
  .nav-menu.active{transform:translateY(0)}
  .nav-menu a{width:100%;padding:8px 0}
  .nav-toggle{display:flex}
  .hero{padding:100px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:32px}
  .hero-desc{font-size:16px}
  .phone-mockup{width:240px;height:480px}
  .phone-screen{padding-top:28px}
  .float-card{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .stat-item .stat-num{font-size:32px}
  .steps-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .steps-grid::before{display:none}
  .earnings-grid{grid-template-columns:1fr}
  .testi-grid{grid-template-columns:1fr}
  .download-inner{grid-template-columns:1fr;text-align:center}
  .download-btns{justify-content:center}
  .download-text h2{font-size:28px}
  /* Footer 平板适配 */
  .footer-grid{grid-template-columns:repeat(4,1fr) !important;gap:16px !important}
  .footer-brand{grid-column:1/-1 !important;margin-bottom:16px !important}
  .footer-col h4{font-size:15px}
  .footer-col ul li a{font-size:13px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero h1{font-size:26px}
  .hero-mini-stats{gap:20px}
  .hero-mini-stat .num{font-size:22px}
  .task-cats{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr;gap:24px}
  .steps-grid{grid-template-columns:1fr}
  /* Footer 手机适配 - 强制4列+完全居中 */
  .footer-grid{
    grid-template-columns:repeat(4,1fr) !important;
    gap:12px !important;
    text-align:center !important;
  }
  .footer-brand{
    grid-column:1/-1 !important;
    margin-bottom:12px !important;
    text-align:center !important;
  }
  .footer-col{
    text-align:center !important;
  }
  .footer-col h4{
    font-size:14px !important;
    margin-bottom:10px !important;
  }
  .footer-col ul{
    text-align:center !important;
    padding:0 !important;
  }
  .footer-col ul li{
    margin-bottom:6px !important;
  }
  .footer-col ul li a{
    font-size:12px !important;
    display:inline-block !important;
  }
  .footer-social{
    justify-content:center !important;
    margin-top:12px !important;
  }
  .footer-bottom{
    text-align:center !important;
    font-size:12px !important;
  }
  .btn{padding:12px 24px;font-size:14px}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .download-btns{flex-direction:column}
  .dl-btn{width:100%;justify-content:center}
}

 .task-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .task-card {
            background: #ffffff;
            border: 1px solid #f0f0f3;
            border-radius: 20px;
            padding: 36px 20px;
            text-align: center;
            transition: 0.2s;
        }
        .task-icon {
            font-size: 52px;
            margin-bottom:16px;
        }
        .task-card h3 {
            font-size: 26px;
            color: #111111;
            margin-bottom:10px;
            font-weight: bold;
        }
        .task-card p {
            font-size:18px;
            color:#666666;
        }
        .task-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.06);
        }
        /* 响应式适配 */
        @media (max-width: 992px) {
            .task-container {
                grid-template-columns: repeat(2,1fr);
            }
            .task-card h3 {
                font-size: 22px;
            }
            .task-card p {
                font-size:16px;
            }
        }
        @media (max-width:576px) {
            body {
                padding:24px 12px;
            }
            .task-container {
                grid-template-columns: 1fr;
                gap:16px;
            }
            .task-card {
                padding:28px 16px;
            }
            .task-icon {
                font-size:44px;
            }
            .task-card h3 {
                font-size: 20px;
            }
        }
		
		/* 外层容器 */
        .advantage-wrap {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            /* PC端一行4个 */
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        /* 单个卡片 */
        .advantage-card {
            border: 1px solid #e8e8e8;
            border-radius: 20px;
            padding: 48px 20px;
            text-align: center;
            background: #fff;
        }
        /* 图标区域 */
        .card-icon {
            font-size: 72px;
            margin-bottom: 16px;
            line-height: 1;
        }
        .title {
            font-size: 28px;
            font-weight: 600;
            color: #222222;
            margin-bottom: 12px;
        }
        .desc {
            font-size: 20px;
            color: #666666;
        }

        /* 响应式：平板 2列 */
        @media (max-width: 1024px) {
            .advantage-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .title {
                font-size: 24px;
            }
            .desc {
                font-size: 18px;
            }
            .card-icon {
                font-size: 64px;
            }
        }
        /* 响应式：手机端 1列 */
        @media (max-width: 640px) {
            .advantage-wrap {
                grid-template-columns: 1fr;
            }
            .advantage-card {
                padding: 36px 16px;
            }
            .title {
                font-size: 22px;
            }
            .desc {
                font-size: 16px;
            }
            .card-icon {
                font-size: 56px;
            }
        }