/* ===================== 快连VPN 教程页共用样式 =====================
   与首页同一套配色与圆角；删除本文件或移除 <link> 即可回滚到无样式状态。
   ================================================================ */
:root{
  --primary:#7C3AED;
  --primary-dark:#5B21B6;
  --primary-light:#8B5CF6;
  --primary-glow:rgba(124,58,237,.25);
  --secondary:#C084FC;
  --bg:#FFFFFF;
  --bg-soft:#F8F7FC;
  --bg-purple-soft:#F3F0FF;
  --text:#1E1B4B;
  --text-muted:#6B7280;
  --line:#E5E7EB;
  --line-purple:rgba(124,58,237,.18);
  --radius:20px;
  --radius-sm:14px;
  --max:1200px;
  --shadow:0 20px 40px rgba(124,58,237,.10);
  --shadow-lg:0 30px 60px rgba(124,58,237,.15);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  font-family:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* 公告栏 */
.topbar{
  background:linear-gradient(90deg,var(--primary),var(--primary-light),var(--secondary));
  color:#fff;font-size:13.5px;text-align:center;padding:10px 16px;font-weight:600;position:relative;z-index:100;
}
.topbar a{text-decoration:underline;text-underline-offset:3px}

/* 导航 */
.guide-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:90}
.guide-header .header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--text)}
.brand img{width:34px;height:34px;border-radius:10px}
.gnav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.gnav a{font-size:14.5px;color:var(--text-muted);padding:8px 12px;border-radius:10px;font-weight:600}
.gnav a:hover{color:var(--primary);background:var(--bg-purple-soft)}

/* 面包屑与标题 */
.crumbs{font-size:13.5px;color:var(--text-muted);margin:26px 0 14px}
.crumbs a{color:var(--text-muted)}
.crumbs a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.crumbs span{margin:0 6px}
.guide-main{max-width:900px;margin:0 auto;padding:44px 24px 80px}
.guide-main h1{font-size:clamp(24px,3.4vw,36px);font-weight:900;line-height:1.3;letter-spacing:-.5px}
.guide-meta{font-size:13.5px;color:var(--text-muted);margin-top:10px}

/* 答案前置 */
.answer-lede{
  background:var(--bg-purple-soft);border:1px solid var(--line-purple);border-left:5px solid var(--primary);
  border-radius:var(--radius-sm);padding:20px 22px;margin:22px 0 8px;
}
.answer-lede .qa-title{font-size:16px;font-weight:800;color:var(--primary-dark);margin-bottom:6px}
.answer-lede p{font-size:15.2px;color:var(--text)}
.answer-lede strong{color:var(--primary-dark)}

/* 正文 */
.guide-body h2{
  font-size:21px;font-weight:800;color:var(--text);
  margin:38px 0 14px;padding-left:14px;border-left:4px solid var(--primary);line-height:1.45;
}
.guide-body h3{font-size:17px;font-weight:800;margin:24px 0 10px;color:var(--text)}
.guide-body p{font-size:15.2px;color:var(--text-muted);margin:0 0 14px}
.guide-body a{color:var(--primary);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.guide-body ul,.guide-body ol{margin:0 0 16px 22px}
.guide-body ul{list-style:disc}
.guide-body ol{list-style:decimal}
.guide-body li{font-size:15.2px;color:var(--text-muted);margin:0 0 9px}
.guide-body strong{color:var(--text)}
.guide-body ol li::marker{color:var(--primary);font-weight:800}

/* 步骤卡 */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:0 0 20px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 20px 18px;box-shadow:0 4px 12px rgba(0,0,0,.03)}
.step h3{counter-increment:s;margin:0 0 8px}
.step h3::before{
  content:counter(s);display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:50%;background:var(--primary);color:#fff;
  font-size:13px;font-weight:800;margin-right:10px;
}
.step p{font-size:14.2px;color:var(--text-muted);margin:0}

/* 提示框 */
.note{background:var(--bg-soft);border:1px dashed var(--line-purple);border-radius:var(--radius-sm);padding:14px 18px;margin:0 0 18px;font-size:14.5px;color:var(--text-muted)}
.note b{color:var(--primary-dark)}

/* 表格 */
.mini-table{width:100%;border-collapse:collapse;margin:6px 0 20px;font-size:14.5px}
.mini-table th,.mini-table td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.mini-table th{background:var(--bg-purple-soft);color:var(--primary-dark);font-weight:800}
.mini-table tr:nth-child(even) td{background:var(--bg-soft)}
.mini-table td{color:var(--text-muted)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.25s}
.faq-item[open]{border-color:var(--line-purple);box-shadow:var(--shadow)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 24px;font-size:15.5px;font-weight:700;color:var(--text);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--primary);font-size:20px;font-weight:800;line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-body{padding:0 24px 22px;border-top:1px solid var(--line);margin-top:-1px}
.faq-body p{font-size:14.8px;color:var(--text-muted);margin:16px 0 0}

/* 相关阅读 */
.related{margin-top:42px;border-top:1px solid var(--line);padding-top:26px}
.related h2{font-size:19px;font-weight:800;margin-bottom:12px}
.related ul{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.related li{}
.related a{
  display:block;font-size:14.6px;color:var(--text);padding:12px 14px;border:1px solid var(--line);
  border-radius:12px;background:#fff;transition:.2s;
}
.related a:hover{border-color:var(--line-purple);background:var(--bg-purple-soft);color:var(--primary-dark)}
.related a span{display:block;font-size:12.5px;color:var(--text-muted);margin-top:3px}

/* 转化区 */
.cta-box{
  margin-top:32px;padding:28px;border-radius:var(--radius);text-align:center;
  background:linear-gradient(135deg,#6D28D9,var(--primary),var(--secondary));color:#fff;
}
.cta-box h2{font-size:22px;font-weight:900;margin-bottom:10px;color:#fff;border:0;padding:0}
.cta-box p{font-size:15px;color:rgba(255,255,255,.86);margin-bottom:20px}
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:.25s}
.btn-white{background:#fff;color:var(--primary-dark)}
.btn-white:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.25)}
.btn-outline{border:2px solid rgba(255,255,255,.7);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.18)}

/* 页脚 */
.site-footer{background:#1B1533;color:rgba(255,255,255,.72);padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.site-footer h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:12px}
.site-footer ul li{margin-bottom:8px;font-size:14px}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-brand .brand{color:#fff}
.footer-brand p{font-size:13.5px;margin-top:12px;max-width:340px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;font-size:13px}

/* 浮动 CTA */
.float-cta{position:fixed;right:20px;bottom:20px;z-index:95;display:flex;flex-direction:column;gap:10px}
.float-btn{
  padding:13px 20px;border-radius:999px;background:var(--primary);color:#fff;font-weight:700;font-size:14px;
  box-shadow:0 12px 30px var(--primary-glow);
}
.float-btn.alt{background:#fff;color:var(--primary-dark);border:1px solid var(--line-purple)}

@media (max-width:900px){
  .steps{grid-template-columns:1fr}
  .related ul{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .gnav{display:none}
}
@media (max-width:640px){
  .guide-main{padding:32px 18px 64px}
  .float-cta{right:14px;bottom:14px;left:14px;flex-direction:row}
  .float-btn{flex:1;justify-content:center;padding:13px 10px;font-size:13.5px}
  .footer-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}