/* ===== Invadigm - 全局重置与基础样式 ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:#0a0a0a;color:#fff;line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .2s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{border:none;outline:none;cursor:pointer;font-family:inherit;background:none}
input,select,textarea{font-family:inherit;outline:none}

/* ===== CSS 变量 ===== */
:root{
    --primary:#fbdc1b;
    --primary-dark:#e6c818;
    --bg-dark:#0a0a0a;
    --bg-card:#161616;
    --bg-card-hover:#1e1e1e;
    --text-white:#fff;
    --text-gray:#999;
    --text-gray-light:#ccc;
    --border-color:#333;
    --header-height:64px;
    --max-width:1200px;
    --radius:8px;
    --radius-lg:16px;
    --green:#00d97e;
    --red:#ff4d4f;
}

/* ===== 通用容器 ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 32px;border-radius:var(--radius);font-size:15px;font-weight:600;transition:all .3s;cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--primary);color:#000}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:8px 20px;font-size:13px}
.btn-lg{padding:14px 40px;font-size:16px}

/* ===== Header ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(0,0,0,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);transition:all .3s}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 20px;height:var(--header-height);display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px}
.logo img{width:36px;height:36px;border-radius:8px}
.logo-text{font-size:22px;font-weight:700;color:#fff;letter-spacing:.5px}
.nav-menu{display:flex;align-items:center;gap:8px}
.nav-item{position:relative;padding:0 16px;height:var(--header-height);display:flex;align-items:center;font-size:15px;color:var(--text-gray-light);cursor:pointer;transition:color .2s}
.nav-item:hover,.nav-item.active{color:var(--primary)}
.nav-item.has-dropdown::after{content:'';display:inline-block;margin-left:6px;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.6}
.nav-dropdown{position:absolute;top:100%;left:0;min-width:200px;background:rgba(20,20,20,.98);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .25s}
.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-dropdown a{display:block;padding:10px 20px;font-size:14px;color:var(--text-gray-light);transition:all .2s}
.nav-dropdown a:hover{color:var(--primary);background:rgba(255,255,255,.05)}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-login{padding:8px 20px;font-size:14px;color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius);transition:all .2s}
.btn-login:hover{border-color:var(--primary);color:var(--primary)}
.btn-register{padding:8px 24px;font-size:14px;background:var(--primary);color:#000;border-radius:var(--radius);font-weight:600;transition:all .2s}
.btn-register:hover{background:var(--primary-dark)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.mobile-toggle span{width:24px;height:2px;background:#fff;transition:all .3s}
.mobile-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.mobile-toggle.active span:nth-child(2){opacity:0}
.mobile-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(7px,-6px)}

/* ===== Hero Section ===== */
.hero{position:relative;padding:120px 0 60px;overflow:hidden;background:linear-gradient(180deg,#0a0a0a 0%,#111 50%,#0a0a0a 100%)}
.hero-bg{position:absolute;top:0;left:0;right:0;bottom:0;z-index:0;opacity:.3}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:rgba(0,217,126,.1);border:1px solid rgba(0,217,126,.3);border-radius:20px;font-size:13px;color:var(--green);margin-bottom:24px}
.hero-badge .dot{width:6px;height:6px;background:var(--green);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.hero-title{font-size:48px;font-weight:800;margin-bottom:16px;line-height:1.2}
.hero-title .highlight{color:var(--primary)}
.hero-subtitle{font-size:18px;color:var(--text-gray-light);margin-bottom:32px}
.hero-stats{display:flex;justify-content:center;gap:40px;margin-bottom:36px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat .num{font-size:42px;font-weight:800;color:var(--primary)}
.hero-stat .label{font-size:14px;color:var(--text-gray)}
.hero-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Section Common ===== */
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:36px;font-weight:700;margin-bottom:12px}
.section-title p{font-size:16px;color:var(--text-gray)}

/* ===== AI Section ===== */
.ai-section{background:linear-gradient(180deg,#0a0a0a 0%,#0f1a12 50%,#0a0a0a 100%)}
.ai-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:800px;margin:0 auto}
.ai-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px;text-align:center;transition:all .3s}
.ai-card:hover{background:var(--bg-card-hover);border-color:rgba(0,217,126,.3);transform:translateY(-4px)}
.ai-card .icon{width:64px;height:64px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:rgba(0,217,126,.1);border-radius:50%}
.ai-card .icon img{width:32px;height:32px}
.ai-card h3{font-size:20px;margin-bottom:8px}
.ai-card p{font-size:14px;color:var(--text-gray)}

/* ===== Cost Comparison ===== */
.cost-section{background:var(--bg-dark)}
.cost-comparison{max-width:900px;margin:0 auto}
.cost-comparison h2{text-align:center;font-size:36px;margin-bottom:16px}
.cost-comparison .desc{text-align:center;color:var(--text-gray);margin-bottom:40px}
.cost-table{background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border-color)}
.cost-table-header{display:grid;grid-template-columns:1.5fr 1fr 1fr;padding:16px 24px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--border-color);font-size:14px;color:var(--text-gray)}
.cost-table-row{display:grid;grid-template-columns:1.5fr 1fr 1fr;padding:20px 24px;border-bottom:1px solid var(--border-color);align-items:center}
.cost-table-row:last-child{border-bottom:none}
.cost-table-row .broker-name{font-size:15px;font-weight:600}
.cost-table-row .spread{font-size:18px;font-weight:700;color:var(--primary)}
.cost-table-row .commission{font-size:18px;font-weight:700;color:var(--green)}
.cost-table-row.highlight{background:rgba(251,220,27,.05)}
.cost-table-row.highlight .broker-name{color:var(--primary)}
.cost-source{text-align:center;margin-top:16px;font-size:12px;color:var(--text-gray)}

/* ===== Cost Calculator ===== */
.calculator-section{background:linear-gradient(180deg,#0a0a0a 0%,#111 100%)}
.calculator-box{max-width:800px;margin:0 auto;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px}
.calculator-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}
.calculator-field label{display:block;font-size:14px;color:var(--text-gray);margin-bottom:8px}
.calculator-field select,.calculator-field input{width:100%;padding:12px 16px;background:#1a1a1a;border:1px solid var(--border-color);border-radius:var(--radius);color:#fff;font-size:15px}
.calculator-field select:focus,.calculator-field input:focus{border-color:var(--primary)}
.calculator-result{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}
.result-card{padding:20px;border-radius:var(--radius);text-align:center}
.result-card.invadigm{background:rgba(251,220,27,.08);border:1px solid rgba(251,220,27,.2)}
.result-card.other{background:rgba(255,77,79,.05);border:1px solid rgba(255,77,79,.15)}
.result-card .title{font-size:14px;color:var(--text-gray);margin-bottom:8px}
.result-card .amount{font-size:28px;font-weight:800}
.result-card.invadigm .amount{color:var(--primary)}
.result-card.other .amount{color:var(--red)}
.result-card .unit{font-size:14px;color:var(--text-gray)}
.result-card .save{font-size:13px;color:var(--green);margin-top:8px}
.calculator-note{margin-top:20px;padding:16px;background:rgba(255,255,255,.02);border-radius:var(--radius);font-size:12px;color:var(--text-gray);line-height:1.8}

/* ===== No Middleman ===== */
.middleman-section{background:var(--bg-dark)}
.middleman-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:900px;margin:0 auto 32px}
.middleman-feature{text-align:center;padding:32px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:all .3s}
.middleman-feature:hover{border-color:rgba(0,217,126,.3);transform:translateY(-4px)}
.middleman-feature .icon{width:56px;height:56px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:rgba(0,217,126,.1);border-radius:50%}
.middleman-feature .icon img{width:28px;height:28px}
.middleman-feature h3{font-size:18px;margin-bottom:8px;color:var(--green)}
.middleman-feature p{font-size:14px;color:var(--text-gray)}
.middleman-desc{text-align:center;max-width:700px;margin:0 auto 32px;font-size:16px;color:var(--text-gray-light);line-height:1.8}

/* ===== Platform Section ===== */
.platform-section{background:linear-gradient(180deg,#0a0a0a 0%,#0f1a12 50%,#0a0a0a 100%)}
.platform-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:32px}
.platform-tab{padding:10px 28px;border-radius:var(--radius);font-size:15px;color:var(--text-gray-light);cursor:pointer;transition:all .2s;border:1px solid transparent}
.platform-tab.active{background:rgba(251,220,27,.1);color:var(--primary);border-color:rgba(251,220,27,.3)}
.platform-content{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;max-width:1000px;margin:0 auto}
.platform-image img{width:100%;border-radius:var(--radius-lg)}
.platform-info h3{font-size:28px;margin-bottom:16px}
.platform-info p{font-size:15px;color:var(--text-gray-light);margin-bottom:24px;line-height:1.8}
.platform-downloads{display:flex;gap:12px;flex-wrap:wrap}
.download-btn{display:flex;align-items:center;gap:8px;padding:10px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);font-size:14px;color:#fff;transition:all .2s}
.download-btn:hover{border-color:var(--primary);color:var(--primary)}
.download-btn img{width:20px;height:20px}

/* ===== Payment Section ===== */
.payment-section{background:var(--bg-dark)}
.payment-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:900px;margin:0 auto 32px}
.payment-feature{text-align:center;padding:32px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:all .3s}
.payment-feature:hover{border-color:rgba(251,220,27,.3);transform:translateY(-4px)}
.payment-feature .icon{width:56px;height:56px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:rgba(251,220,27,.1);border-radius:50%}
.payment-feature .icon img{width:28px;height:28px}
.payment-feature h3{font-size:18px;margin-bottom:8px;color:var(--primary)}
.payment-feature p{font-size:14px;color:var(--text-gray)}

/* ===== Account Steps ===== */
.steps-section{background:linear-gradient(180deg,#0a0a0a 0%,#111 100%)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:1000px;margin:0 auto}
.step-card{text-align:center;position:relative}
.step-num{width:48px;height:48px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#000;border-radius:50%;font-size:20px;font-weight:800}
.step-card h3{font-size:18px;margin-bottom:8px}
.step-card p{font-size:14px;color:var(--text-gray);line-height:1.6}

/* ===== CTA Section ===== */
.cta-section{text-align:center;padding:80px 20px;background:linear-gradient(135deg,rgba(251,220,27,.05) 0%,rgba(0,217,126,.05) 100%)}
.cta-section h2{font-size:36px;margin-bottom:16px}
.cta-section p{font-size:16px;color:var(--text-gray-light);margin-bottom:32px}
.cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Footer ===== */
.footer{background:#060606;border-top:1px solid rgba(255,255,255,.05);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:40px;max-width:var(--max-width);margin:0 auto;padding:0 20px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:20px;color:#fff}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{font-size:13px;color:var(--text-gray);transition:color .2s}
.footer-col ul li a:hover{color:var(--primary)}
.footer-legal{max-width:var(--max-width);margin:40px auto 0;padding:24px 20px;border-top:1px solid rgba(255,255,255,.05)}
.footer-legal p{font-size:12px;color:var(--text-gray);line-height:1.8;margin-bottom:12px}
.footer-bottom{max-width:var(--max-width);margin:0 auto;padding:20px;text-align:center;border-top:1px solid rgba(255,255,255,.05)}
.footer-bottom p{font-size:13px;color:var(--text-gray)}
.footer-links{display:flex;justify-content:center;gap:24px;margin-bottom:12px}
.footer-links a{font-size:13px;color:var(--text-gray);transition:color .2s}
.footer-links a:hover{color:var(--primary)}

/* ===== News Page Styles ===== */
.news-header{padding:120px 0 40px;text-align:center;background:linear-gradient(180deg,#0a0a0a 0%,#111 100%)}
.news-header h1{font-size:36px;margin-bottom:12px}
.news-header p{font-size:16px;color:var(--text-gray)}
.news-filters{display:flex;justify-content:center;gap:8px;margin-bottom:40px;flex-wrap:wrap}
.news-filter{padding:8px 20px;border-radius:20px;font-size:14px;color:var(--text-gray-light);cursor:pointer;transition:all .2s;border:1px solid var(--border-color)}
.news-filter.active{background:var(--primary);color:#000;border-color:var(--primary)}
.news-filter:hover:not(.active){border-color:var(--primary);color:var(--primary)}
.news-list{max-width:1000px;margin:0 auto;padding:0 20px 80px}
.news-item{display:grid;grid-template-columns:240px 1fr;gap:24px;padding:24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);margin-bottom:20px;transition:all .3s;cursor:pointer}
.news-item:hover{background:var(--bg-card-hover);border-color:rgba(251,220,27,.2);transform:translateY(-2px)}
.news-item img{width:100%;height:140px;object-fit:cover;border-radius:var(--radius)}
.news-item-content h3{font-size:18px;margin-bottom:8px;transition:color .2s}
.news-item:hover .news-item-content h3{color:var(--primary)}
.news-item-content .summary{font-size:14px;color:var(--text-gray);margin-bottom:12px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item-meta{display:flex;gap:16px;font-size:12px;color:var(--text-gray)}
.news-item-meta .tag{padding:2px 10px;background:rgba(251,220,27,.1);color:var(--primary);border-radius:12px}
.news-pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.news-pagination a{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius);border:1px solid var(--border-color);font-size:14px;color:var(--text-gray-light);transition:all .2s}
.news-pagination a:hover,.news-pagination a.active{background:var(--primary);color:#000;border-color:var(--primary)}

/* ===== News Detail Page ===== */
.news-detail{padding:120px 0 80px}
.news-detail-container{max-width:800px;margin:0 auto;padding:0 20px}
.news-detail-header{margin-bottom:32px}
.news-detail-header .tag{display:inline-block;padding:4px 14px;background:rgba(251,220,27,.1);color:var(--primary);border-radius:16px;font-size:13px;margin-bottom:16px}
.news-detail-header h1{font-size:32px;margin-bottom:16px;line-height:1.4}
.news-detail-meta{display:flex;gap:20px;font-size:13px;color:var(--text-gray);padding-bottom:20px;border-bottom:1px solid var(--border-color)}
.news-detail-content{padding:32px 0}
.news-detail-content p{font-size:16px;line-height:2;margin-bottom:20px;color:var(--text-gray-light)}
.news-detail-content h2{font-size:24px;margin:32px 0 16px}
.news-detail-content img{margin:24px auto;border-radius:var(--radius-lg)}
.news-detail-content blockquote{padding:16px 24px;background:rgba(251,220,27,.05);border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0;margin:24px 0;font-size:15px;color:var(--text-gray-light)}
.news-detail-footer{padding:24px 0;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}
.news-detail-share{display:flex;gap:12px}
.share-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--bg-card);border:1px solid var(--border-color);transition:all .2s}
.share-btn:hover{border-color:var(--primary);color:var(--primary)}
.news-nav{display:flex;justify-content:space-between;gap:16px;margin-top:32px}
.news-nav a{padding:12px 24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);font-size:14px;color:var(--text-gray-light);transition:all .2s;max-width:45%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-nav a:hover{border-color:var(--primary);color:var(--primary)}

/* ===== 移动端适配 ===== */
@media (max-width:1024px){
    .footer-grid{grid-template-columns:repeat(3,1fr)}
    .platform-content{grid-template-columns:1fr;gap:24px}
    .steps-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
    .nav-menu{display:none;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:rgba(0,0,0,.98);flex-direction:column;align-items:flex-start;padding:20px;gap:0;overflow-y:auto}
    .nav-menu.active{display:flex}
    .nav-item{width:100%;height:auto;padding:16px 20px;border-bottom:1px solid rgba(255,255,255,.05);justify-content:space-between;font-size:16px}
    .nav-dropdown{position:static;opacity:1;visibility:visible;transform:none;background:none;border:none;padding:0 0 0 20px;min-width:auto;display:none}
    .nav-item.expanded .nav-dropdown{display:block}
    .mobile-toggle{display:flex}
    .header-actions .btn-login,.header-actions .btn-register{display:none}
    .header-actions-mobile{display:flex;gap:10px;width:100%;padding:20px;border-top:1px solid rgba(255,255,255,.05);margin-top:20px}

    .hero{padding:100px 0 40px}
    .hero-title{font-size:30px}
    .hero-subtitle{font-size:15px}
    .hero-stats{gap:24px}
    .hero-stat .num{font-size:32px}

    .section{padding:50px 0}
    .section-title h2{font-size:26px}

    .ai-cards{grid-template-columns:1fr}

    .cost-table-header,.cost-table-row{grid-template-columns:1fr 1fr 1fr;padding:12px 16px}
    .cost-table-header .col-broker,.cost-table-row .broker-name{font-size:12px}
    .cost-table-row .spread,.cost-table-row .commission{font-size:14px}

    .calculator-box{padding:20px}
    .calculator-row{grid-template-columns:1fr}
    .calculator-result{grid-template-columns:1fr}

    .middleman-features,.payment-features{grid-template-columns:1fr}
    .steps-grid{grid-template-columns:1fr 1fr;gap:16px}
    .step-card p{font-size:13px}

    .platform-downloads{justify-content:center}
    .platform-image img{max-width:400px;margin:0 auto}

    .cta-section h2{font-size:26px}

    .footer-grid{grid-template-columns:repeat(2,1fr);gap:24px}
    .footer-legal p{font-size:11px}

    .news-item{grid-template-columns:1fr;gap:16px}
    .news-item img{height:180px}
    .news-detail-header h1{font-size:22px}
    .news-detail-content p{font-size:15px;line-height:1.8}
    .news-nav{flex-direction:column}
    .news-nav a{max-width:100%;text-align:center}
}
@media (max-width:480px){
    .hero-title{font-size:24px}
    .hero-stat .num{font-size:28px}
    .hero-stat .label{font-size:12px}
    .section-title h2{font-size:22px}
    .ai-card{padding:20px}
    .calculator-box{padding:16px}
    .footer-grid{grid-template-columns:1fr}
    .hero-buttons{flex-direction:column;width:100%}
    .hero-buttons .btn{width:100%}
    .cta-buttons{flex-direction:column;width:100%}
    .cta-buttons .btn{width:100%}
    .steps-grid{grid-template-columns:1fr}
}