/* 快连下载站 jj-kuailian.com.cn 全局样式 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#1e6fff;--primary-dark:#0b4fd4;--accent:#00c6ff;
  --text:#1f2937;--text-light:#5b6675;--bg:#f5f8ff;--white:#fff;
  --border:#e3eaf6;--radius:14px;--shadow:0 8px 30px rgba(30,111,255,.10);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Arial,sans-serif;color:var(--text);background:var(--white);line-height:1.75;font-size:16px}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
.container{max-width:1140px;margin:0 auto;padding:0 20px}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:800;color:var(--text)}
.logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;flex:none}
.logo-mark svg{width:20px;height:20px}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--text-light);letter-spacing:1px}
.nav-links{display:flex;gap:6px;list-style:none;align-items:center}
.nav-links a{display:block;padding:8px 14px;border-radius:8px;color:var(--text);font-size:15px;font-weight:500}
.nav-links a:hover,.nav-links a.active{background:var(--bg);color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#0b2e6e 0%,#1e6fff 55%,#00c6ff 100%);color:#fff;padding:72px 0 84px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08)}
.hero::before{content:"";position:absolute;left:-80px;bottom:-160px;width:360px;height:360px;border-radius:50%;background:rgba(255,255,255,.06)}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.hero-text{flex:1;min-width:280px}
.hero h1{font-size:38px;line-height:1.3;margin-bottom:16px;font-weight:800}
.hero p.lead{font-size:17px;opacity:.92;margin-bottom:28px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{flex:0 0 300px;min-width:260px;display:flex;justify-content:center}
.hero-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:20px;padding:30px;width:100%;max-width:320px;backdrop-filter:blur(8px)}
.hero-card .ver{font-size:14px;opacity:.85;margin-bottom:6px}
.hero-card .big{font-size:26px;font-weight:800;margin-bottom:18px}
.hero-card ul{list-style:none;font-size:14px;opacity:.95}
.hero-card li{padding:5px 0 5px 26px;position:relative}
.hero-card li::before{content:"";position:absolute;left:0;top:11px;width:14px;height:14px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ffffff'%3E%3Cpath d='M9 16.2l-3.5-3.5L4 14.2 9 19.2 20 8.2l-1.5-1.5z'/%3E%3C/svg%3E") no-repeat center/contain}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:10px;font-size:16px;font-weight:700;cursor:pointer;border:none;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:#fff;color:var(--primary-dark);box-shadow:0 6px 20px rgba(0,0,0,.18)}
.btn-primary:hover{color:var(--primary-dark)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn-blue{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:var(--shadow)}
.btn-blue:hover{color:#fff}
.btn-lg{padding:15px 36px;font-size:17px}
.btn svg{width:19px;height:19px;fill:currentColor}

/* 通用区块 */
.section{padding:64px 0}
.section.alt{background:var(--bg)}
.section-head{text-align:center;max-width:680px;margin:0 auto 44px}
.section-head h2{font-size:30px;font-weight:800;margin-bottom:12px}
.section-head p{color:var(--text-light);font-size:16px}
.breadcrumb{font-size:13px;color:var(--text-light);padding:14px 0}
.breadcrumb a{color:var(--text-light)}
.breadcrumb span{margin:0 8px}

/* 特性网格 */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.feature{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;transition:transform .18s,box-shadow .18s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature .ico{width:50px;height:50px;border-radius:12px;background:linear-gradient(135deg,#e8f1ff,#d9f4ff);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature .ico svg{width:26px;height:26px;fill:var(--primary)}
.feature h3{font-size:18px;margin-bottom:8px}
.feature p{color:var(--text-light);font-size:14.5px}

/* 平台下载卡片 */
.platforms{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.platform{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:34px 28px;text-align:center;transition:transform .18s,box-shadow .18s}
.platform:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.platform .p-ico{width:72px;height:72px;margin:0 auto 18px;border-radius:18px;display:flex;align-items:center;justify-content:center}
.platform .p-ico svg{width:38px;height:38px;fill:#fff}
.p-win{background:linear-gradient(135deg,#2b88d8,#1e6fff)}
.p-and{background:linear-gradient(135deg,#34d399,#059669)}
.p-ios{background:linear-gradient(135deg,#64748b,#334155)}
.p-mac{background:linear-gradient(135deg,#8b95a7,#4b5563)}
.platform h3{font-size:20px;margin-bottom:6px}
.platform .meta{font-size:13px;color:var(--text-light);margin-bottom:16px}
.platform .meta span{display:inline-block;margin:0 6px}
.platform p{font-size:14px;color:var(--text-light);margin-bottom:20px;min-height:44px}

/* 内容文章 */
.article{max-width:820px;margin:0 auto}
.article h1{font-size:32px;margin:10px 0 18px;font-weight:800}
.article h2{font-size:23px;margin:34px 0 12px;padding-left:12px;border-left:4px solid var(--primary)}
.article h3{font-size:18px;margin:24px 0 8px}
.article p{margin-bottom:14px;color:#374151}
.article ul,.article ol{margin:0 0 14px 24px}
.article li{margin-bottom:7px}
.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.article th,.article td{border:1px solid var(--border);padding:11px 14px;text-align:left}
.article th{background:var(--bg);font-weight:700}
.article .note{background:#eef6ff;border:1px solid #cfe3ff;border-radius:10px;padding:16px 20px;margin:20px 0;font-size:14.5px}
.article .note strong{color:var(--primary-dark)}

/* 步骤 */
.steps{counter-reset:step;margin:26px 0}
.step{position:relative;padding:0 0 26px 62px;counter-increment:step}
.step::before{content:counter(step);position:absolute;left:0;top:0;width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center}
.step h3{margin-bottom:4px}
.step p{color:var(--text-light);font-size:14.5px}
.step:not(:last-child)::after{content:"";position:absolute;left:20px;top:46px;bottom:0;width:2px;background:var(--border)}

/* FAQ */
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:14px;overflow:hidden;background:#fff}
.faq-item summary{padding:18px 22px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--primary);font-weight:400}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-body{padding:0 22px 20px;color:var(--text-light);font-size:15px}

/* 版本信息条 */
.info-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin:26px 0}
.info-bar div{text-align:center}
.info-bar .k{font-size:13px;color:var(--text-light);margin-bottom:4px}
.info-bar .v{font-weight:700;font-size:16px}

/* CTA */
.cta{background:linear-gradient(135deg,#0b2e6e,#1e6fff);border-radius:20px;color:#fff;padding:48px 36px;text-align:center;margin:10px 0}
.cta h2{font-size:27px;margin-bottom:10px}
.cta p{opacity:.9;margin-bottom:24px}

/* 相关链接 */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.related a{display:block;background:var(--white);border:1px solid var(--border);border-radius:12px;padding:20px;font-weight:600;color:var(--text)}
.related a:hover{border-color:var(--primary);color:var(--primary)}
.related small{display:block;font-weight:400;color:var(--text-light);margin-top:4px;font-size:13px}

/* 页脚 */
.site-footer{background:#0d1b34;color:#aebcd6;padding:54px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;padding-bottom:38px}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:9px}
.footer-grid a{color:#aebcd6}
.footer-grid a:hover{color:#fff}
.footer-about p{margin:12px 0;line-height:1.8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;font-size:13px;color:#7e8ca8}
.footer-bottom a{color:#aebcd6}

/* 响应式 */
@media(max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3,.platforms,.related{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .info-bar{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  .nav-links{position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px}
  .hero{padding:48px 0 60px}
  .hero h1{font-size:28px}
  .section{padding:44px 0}
  .section-head h2{font-size:24px}
  .grid-3,.grid-4,.grid-2,.platforms,.related,.footer-grid{grid-template-columns:1fr}
  .info-bar{grid-template-columns:1fr 1fr}
  .article h1{font-size:25px}
}