/* ============================================
   MT4 科技风格下载网站 - styles.css
   主题：深色 + 青蓝/紫渐变 + 网格背景
============================================ */
:root{
  --bg:#070b19;
  --bg2:#0d1428;
  --panel:#111a33;
  --panel2:#16223d;
  --line:rgba(120,160,220,.18);
  --text:#e6edf7;
  --muted:#8a97b3;
  --cyan:#00d4ff;
  --cyan2:#0099c6;
  --violet:#7b5cff;
  --pink:#ff5cad;
  --grad:linear-gradient(135deg,#00d4ff 0%,#7b5cff 100%);
  --grad2:linear-gradient(135deg,#00d4ff 0%,#0099c6 100%);
  --shadow:0 8px 30px rgba(0,180,255,.15);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:88px 0;position:relative}
.section-alt{background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 100%)}

/* ===== 公告栏 ===== */
.announcement-bar{background:var(--grad);color:#001018;font-size:13px;font-weight:700;padding:8px 0;text-align:center;letter-spacing:.3px}
.announcement-bar .container{display:flex;align-items:center;justify-content:center;gap:10px}
.badge-dot{width:8px;height:8px;border-radius:50%;background:#001018;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(1.4)}}

/* ===== 导航 ===== */
.navbar{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);background:rgba(7,11,25,.75);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:19px}
.logo-icon{width:34px;height:34px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#001018;font-size:14px;font-weight:900;box-shadow:0 0 18px rgba(0,212,255,.45)}
.logo-accent{color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:26px;font-size:14.5px}
.nav-links a{color:var(--muted);transition:.2s;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:not(.btn-nav)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:.25s}
.nav-links a:not(.btn-nav):hover::after,.nav-links a.active::after{width:100%}
.btn-nav{background:var(--grad);color:#001018!important;padding:9px 18px;border-radius:10px;font-weight:800;box-shadow:var(--shadow)}
.btn-nav::after{display:none}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer}
.menu-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ===== HERO ===== */
.hero{position:relative;padding:80px 0 60px;overflow:hidden}
.hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(0,212,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(0,212,255,.07) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 40%,transparent 100%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:2px;color:var(--cyan);background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.3);padding:6px 14px;border-radius:30px;margin-bottom:20px;font-weight:700}
.tag-dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pulse 1.6s infinite}
.hero h1{font-size:56px;line-height:1.12;font-weight:900;letter-spacing:-1px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{margin:22px 0 30px;color:var(--muted);font-size:16.5px;max-width:520px}
.hero-stats{display:flex;gap:38px;margin-bottom:32px}
.h-stat{display:flex;flex-direction:column}
.h-stat b{font-size:34px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.h-stat span{font-size:15px;color:var(--muted);font-weight:700}
.h-stat label{font-size:12px;color:var(--muted);margin-top:4px;letter-spacing:1px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#001018;font-weight:900;padding:14px 28px;border-radius:12px;font-size:15px;box-shadow:0 6px 24px rgba(0,212,255,.35);transition:.25s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,212,255,.5)}
.btn-lg{padding:16px 36px;font-size:16.5px}
.btn-ghost{display:inline-flex;align-items:center;gap:6px;color:var(--text);font-weight:700;padding:14px 22px;border:1px solid var(--line);border-radius:12px;transition:.2s;background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(0,212,255,.06)}

/* HERO 终端 */
.hero-visual{position:relative}
.terminal{background:linear-gradient(180deg,#0f1830,#0a1124);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5),0 0 0 1px rgba(0,212,255,.08);position:relative}
.terminal::before{content:"";position:absolute;inset:-1px;border-radius:18px;background:var(--grad);z-index:-1;filter:blur(18px);opacity:.35}
.terminal-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--line)}
.terminal-bar .dot{width:11px;height:11px;border-radius:50%}
.dot.r{background:#ff5f56}.dot.y{background:#ffbd2e}.dot.g{background:#27c93f}
.terminal-title{margin-left:auto;font-size:11px;color:var(--muted);letter-spacing:1.5px;font-family:"SF Mono",monospace}
.terminal-body{padding:8px 6px 14px;font-family:"SF Mono",monospace;font-size:13px}
.t-row{display:grid;grid-template-columns:1.4fr 1fr 1fr .9fr;padding:8px 14px;border-bottom:1px solid rgba(255,255,255,.04)}
.t-row:last-of-type{border-bottom:none}
.t-head{color:var(--muted);font-size:11px;letter-spacing:1px;text-transform:uppercase;background:rgba(255,255,255,.02)}
.t-row span:first-child{color:var(--text);font-weight:700}
.t-row span:nth-child(2),.t-row span:nth-child(3){color:var(--muted)}
.up{color:#2ecc71}.down{color:#ff4d6d}
.t-chart{margin:6px 10px 0;background:rgba(0,212,255,.04);border-radius:10px;padding:6px}
.t-chart svg{width:100%;height:70px;display:block}
.float-badge{position:absolute;display:flex;align-items:center;gap:10px;background:rgba(17,26,51,.92);border:1px solid var(--line);border-radius:12px;padding:10px 14px;backdrop-filter:blur(8px);box-shadow:var(--shadow)}
.float-badge b{font-size:17px;font-weight:900;color:var(--cyan);display:block;line-height:1}
.float-badge label{font-size:11px;color:var(--muted);display:block}
.fb-icon{font-size:20px}
.fb1{top:18px;left:-26px;animation:float1 4s ease-in-out infinite}
.fb2{bottom:30px;right:-22px;animation:float2 5s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes float2{0%,100%{transform:translateY(0)}50%{transform:translateY(12px)}}

/* ===== TICKER ===== */
.ticker{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;padding:12px 0}
.ticker-track{display:flex;gap:40px;white-space:nowrap;animation:tick 40s linear infinite;font-size:13.5px;font-weight:700}
.ticker-track span{color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.ticker-track i{font-style:normal;font-size:12px}
@keyframes tick{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ===== 通用标题 ===== */
.section-head{text-align:center;margin-bottom:52px}
.section-kicker{font-size:12px;letter-spacing:3px;color:var(--cyan);font-weight:800;text-transform:uppercase}
.section-head h2{font-size:38px;font-weight:900;margin:10px 0 12px;letter-spacing:-.5px}
.section-head p{color:var(--muted);max-width:620px;margin:0 auto;font-size:15.5px}

/* ===== 下载卡片 ===== */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{background:linear-gradient(180deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.3s;position:relative;overflow:hidden}
.dl-card::after{content:"";position:absolute;top:0;right:0;width:90px;height:90px;background:var(--grad);filter:blur(40px);opacity:0;transition:.3s}
.dl-card:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.4);box-shadow:0 16px 40px rgba(0,180,255,.18)}
.dl-card:hover::after{opacity:.25}
.dl-icon{font-size:38px;margin-bottom:14px}
.dl-card h3{font-size:20px;font-weight:900;margin-bottom:6px}
.dl-ver{color:var(--cyan);font-size:12.5px;font-weight:700;margin-bottom:14px;font-family:"SF Mono",monospace}
.dl-card ul{margin-bottom:22px}
.dl-card ul li{color:var(--muted);font-size:14px;padding:4px 0;padding-left:18px;position:relative}
.dl-card ul li::before{content:"▸";position:absolute;left:0;color:var(--cyan)}
.btn-download{width:100%;background:rgba(0,212,255,.08);color:var(--text);border:1px solid rgba(0,212,255,.3);padding:12px;border-radius:10px;font-weight:800;cursor:pointer;transition:.25s;font-size:14.5px;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn-download:hover{background:var(--grad);color:#001018;border-color:transparent}
.btn-download .arr{font-size:16px}

/* ===== 中文专区 TABS ===== */
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:34px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:8px;max-width:720px;margin-left:auto;margin-right:auto}
.tab{background:none;border:none;color:var(--muted);padding:10px 20px;border-radius:10px;cursor:pointer;font-weight:700;font-size:14px;transition:.2s}
.tab:hover{color:var(--text)}
.tab.active{background:var(--grad);color:#001018}
.tab-panel{display:none;animation:fade .35s ease}
.tab-panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.cn-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.cn-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;transition:.25s;position:relative}
.cn-card:hover{border-color:rgba(123,92,255,.45);transform:translateY(-4px);box-shadow:0 12px 30px rgba(123,92,255,.15)}
.cn-tag{position:absolute;top:16px;right:16px;font-size:11px;font-weight:800;color:var(--cyan);background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.3);padding:3px 10px;border-radius:20px;letter-spacing:1px}
.cn-card h4{font-size:17px;font-weight:900;margin-bottom:8px;padding-right:60px}
.cn-card p{color:var(--muted);font-size:14px;margin-bottom:12px}
.cn-card a{color:var(--cyan);font-weight:700;font-size:13.5px}
.cn-cta{margin-top:42px;background:linear-gradient(135deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:18px;padding:32px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;position:relative;overflow:hidden}
.cn-cta::before{content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;background:var(--grad);filter:blur(70px);opacity:.25}
.cn-cta-text h3{font-size:24px;font-weight:900}
.cn-cta-text p{color:var(--muted);margin-top:4px}
.cn-cta-stats{display:flex;gap:34px;flex-wrap:wrap;z-index:1}
.cn-cta-stats div{text-align:center}
.cn-cta-stats b{display:block;font-size:26px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cn-cta-stats label{font-size:12px;color:var(--muted)}

/* ===== 平台优势 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.25s}
.feat-card:hover{border-color:rgba(0,212,255,.35);transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,180,255,.12)}
.feat-icon{width:48px;height:48px;border-radius:12px;background:rgba(0,212,255,.1);display:grid;place-items:center;font-size:22px;margin-bottom:16px;border:1px solid rgba(0,212,255,.25)}
.feat-card h4{font-size:18px;font-weight:900;margin-bottom:8px}
.feat-card p{color:var(--muted);font-size:14px}

/* ===== FAQ ===== */
.faq-list{max-width:780px;margin:0 auto}
.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;background:none;border:none;color:var(--text);padding:18px 22px;font-size:15.5px;font-weight:800;cursor:pointer;display:flex;justify-content:space-between;align-items:center;text-align:left}
.faq-plus{font-size:22px;color:var(--cyan);transition:.3s}
.faq-item.open .faq-plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:.35s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 22px 18px;color:var(--muted);font-size:14.5px}

/* ===== CTA ===== */
.cta-section{position:relative;padding:80px 0;background:radial-gradient(ellipse at center,rgba(0,212,255,.12),transparent 70%)}
.cta-inner{text-align:center}
.cta-section h2{font-size:40px;font-weight:900;margin-bottom:12px;letter-spacing:-.5px}
.cta-section p{color:var(--muted);margin-bottom:28px;font-size:16px}

/* ===== 页脚 ===== */
.footer{background:var(--bg2);border-top:1px solid var(--line);padding:60px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:30px;margin-bottom:40px}
.logo-light{margin-bottom:14px}
.foot-brand p{color:var(--muted);font-size:14px;max-width:280px}
.socials{display:flex;gap:10px;margin-top:16px}
.socials a{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);transition:.2s;font-size:15px}
.socials a:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(0,212,255,.06)}
.foot-col h5{font-size:14px;font-weight:900;margin-bottom:14px;color:var(--text)}
.foot-col a{display:block;color:var(--muted);font-size:13.5px;padding:5px 0;transition:.2s}
.foot-col a:hover{color:var(--cyan)}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border-top:1px solid var(--line);padding-top:20px;font-size:12.5px;color:var(--muted)}

/* ===== 弹窗 ===== */
.modal{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;background:rgba(2,5,15,.75);backdrop-filter:blur(6px)}
.modal.show{display:flex;animation:fade .25s ease}
.modal-box{background:linear-gradient(180deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:20px;padding:38px 32px;text-align:center;max-width:420px;width:90%;position:relative;box-shadow:0 24px 60px rgba(0,0,0,.6)}
.modal-close{position:absolute;top:14px;right:18px;background:none;border:none;color:var(--muted);font-size:26px;cursor:pointer}
.modal-icon{font-size:44px;margin-bottom:10px}
.modal-box h3{font-size:22px;font-weight:900;margin-bottom:8px}
.modal-box p{color:var(--muted);font-size:14px}
.progress{height:10px;background:rgba(255,255,255,.08);border-radius:6px;margin:20px 0 12px;overflow:hidden}
.progress-bar{height:100%;width:0;background:var(--grad);border-radius:6px;transition:width .3s}
.modal-tip{font-size:11.5px;color:var(--muted);margin-top:6px}

/* ===== 入场动画 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:.6s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1;max-width:560px;margin:0 auto;width:100%}
  .dl-grid,.feat-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(3,1fr);gap:26px}
  .foot-brand{grid-column:1/-1}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .menu-toggle{display:flex}
  .nav-links{position:fixed;top:68px;left:0;right:0;flex-direction:column;background:rgba(7,11,25,.96);backdrop-filter:blur(14px);padding:20px;border-bottom:1px solid var(--line);gap:16px;transform:translateY(-150%);transition:.35s;align-items:flex-start}
  .nav-links.open{transform:translateY(0)}
  .hero{padding:50px 0 40px}
  .hero h1{font-size:36px}
  .hero-stats{gap:26px}
  .h-stat b{font-size:27px}
  .section-head h2{font-size:29px}
  .dl-grid,.feat-grid,.cn-grid{grid-template-columns:1fr}
  .cn-cta{flex-direction:column;text-align:center;justify-content:center}
  .cn-cta-stats{justify-content:center}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .cta-section h2{font-size:29px}
  .float-badge{display:none}
  .ticker-track{font-size:12px;gap:28px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero h1{font-size:30px}
  .hero-actions .btn-primary,.hero-actions .btn-ghost{flex:1;justify-content:center}
  .foot-grid{grid-template-columns:1fr}
}