/* ============================================================
   云汇盘 - 前台 / 用户中心 设计系统 (浅色)
   ============================================================ */
:root{
  --primary:#4f46e5; --primary-2:#6366f1; --primary-d:#4338ca;
  --primary-soft:#eef2ff; --primary-grad:linear-gradient(135deg,#6366f1,#8b5cf6);
  --bg:#f6f8fc; --surface:#ffffff; --surface-2:#f9fafb;
  --line:#e6e9f0; --line-2:#eef1f6;
  --text:#1f2430; --text-2:#5b6475; --text-3:#93a0b5;
  --success:#10b981; --warn:#f59e0b; --danger:#ef4444; --info:#3b82f6;
  --radius:14px; --radius-sm:10px; --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(20,30,60,.06),0 1px 3px rgba(20,30,60,.05);
  --shadow:0 6px 20px rgba(30,40,80,.08); --shadow-lg:0 18px 50px rgba(30,40,80,.14);
  --sidebar-w:248px; --sidebar-w-min:72px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
svg{display:inline-block;vertical-align:middle}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--text-2)} .muted-3{color:var(--text-3)}
.center{text-align:center}
.hidden{display:none!important}
.flex{display:flex}.items-center{align-items:center}.between{justify-content:space-between}
.wrap{flex-wrap:wrap}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-20{gap:20px}
.grow{flex:1}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);
  font-weight:600;font-size:14px;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--primary-grad);color:#fff;box-shadow:0 6px 16px rgba(99,102,241,.35)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(99,102,241,.45)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface-2);border-color:#d6dbe6}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);box-shadow:none}
.btn-outline:hover{background:var(--primary-soft)}
.btn-light{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-light:hover{background:rgba(255,255,255,.26)}
.btn-sm{padding:7px 13px;font-size:13px}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-block{width:100%;justify-content:center}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{opacity:.9}

/* ---------- 导航栏 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;height:66px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.3px}
.brand .logo{width:38px;height:38px;border-radius:11px;background:var(--primary-grad);display:grid;place-items:center;
  color:#fff;font-size:20px;box-shadow:0 6px 16px rgba(99,102,241,.4)}
.nav-links{display:flex;gap:6px}
.nav-links a{padding:9px 14px;border-radius:10px;font-weight:600;font-size:14px;color:var(--text-2);transition:.15s}
.nav-links a:hover{background:var(--primary-soft);color:var(--primary)}
.nav-actions{display:flex;gap:10px;align-items:center;margin-left:auto}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--text);padding:6px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:90px 0 80px;background:
  radial-gradient(1200px 500px at 80% -10%,rgba(139,92,246,.18),transparent),
  radial-gradient(900px 500px at 0% 10%,rgba(99,102,241,.16),transparent),var(--surface)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero h1{font-size:50px;line-height:1.12;font-weight:850;letter-spacing:-1px}
.hero h1 .grad{background:var(--primary-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--text-2);margin:20px 0 30px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:30px;margin-top:38px}
.hero-stats .num{font-size:26px;font-weight:800;color:var(--text)}
.hero-stats .lab{font-size:13px;color:var(--text-3)}
.hero-visual{position:relative}
.float-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;
  box-shadow:var(--shadow-lg);position:absolute}
.hero .glow{position:absolute;inset:-40px;border-radius:30px;background:conic-gradient(from 0deg,#6366f1,#8b5cf6,#22d3ee,#6366f1);
  filter:blur(60px);opacity:.25;z-index:-1}

/* ---------- 区块 ---------- */
.section{padding:80px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head .kicker{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:1px;
  background:var(--primary-soft);padding:5px 12px;border-radius:20px;margin-bottom:14px}
.section-head h2{font-size:34px;font-weight:800;letter-spacing:-.5px}
.section-head p{color:var(--text-2);margin-top:12px;font-size:16px}

/* ---------- 卡片 ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.feature-icon{width:54px;height:54px;border-radius:15px;background:var(--primary-soft);color:var(--primary);
  display:grid;place-items:center;margin-bottom:16px}
.feature-icon svg{width:26px;height:26px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--text-2);font-size:14.5px}

/* ---------- 套餐对比 ---------- */
.price-card{position:relative;display:flex;flex-direction:column}
.price-card .hot{position:absolute;top:-12px;right:20px;background:var(--primary-grad);color:#fff;font-size:12px;
  font-weight:700;padding:5px 12px;border-radius:20px;box-shadow:0 6px 16px rgba(99,102,241,.4)}
.price-card .pname{font-size:20px;font-weight:800}
.price-card .pprice{font-size:40px;font-weight:850;margin:14px 0 4px}
.price-card .pprice small{font-size:16px;font-weight:600;color:var(--text-3)}
.price-card .porigin{color:var(--text-3);text-decoration:line-through;font-size:14px}
.price-card ul{list-style:none;margin:18px 0;display:flex;flex-direction:column;gap:11px;flex:1}
.price-card li{display:flex;gap:9px;font-size:14.5px;color:var(--text-2);align-items:flex-start}
.price-card li svg{color:var(--success);flex-shrink:0;margin-top:3px}
.price-card.featured{border-color:var(--primary);box-shadow:0 16px 40px rgba(99,102,241,.22)}

/* ---------- 评价 ---------- */
.review{font-size:14.5px;color:var(--text-2)}
.stars{color:#fbbf24;letter-spacing:2px}
.reviewer{display:flex;align-items:center;gap:12px;margin-top:16px}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-soft);color:var(--primary);
  display:grid;place-items:center;font-weight:700}

/* ---------- 客户下载 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.dl-item{display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px 10px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--surface);transition:.18s}
.dl-item:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.dl-item .di{width:46px;height:46px;border-radius:13px;background:var(--surface-2);display:grid;place-items:center;color:var(--primary)}
.dl-item span{font-size:13.5px;font-weight:600}

/* ---------- FAQ ---------- */
.faq-item{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;cursor:pointer;font-weight:600;gap:14px}
.faq-q svg{transition:.2s;color:var(--text-3)}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:.25s;padding:0 20px;color:var(--text-2);font-size:14.5px}
.faq-item.open .faq-a{max-height:200px;padding:0 20px 18px}

/* ---------- 表单 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px}
.input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);font-size:15px;
  font-family:var(--font);background:var(--surface);transition:.15s;color:var(--text)}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
select.input{cursor:pointer}
textarea.input{resize:vertical;min-height:110px}

/* ---------- 页脚 ---------- */
.footer{background:#0f1424;color:#aeb6c8;padding:56px 0 28px;margin-top:40px}
.footer a{color:#aeb6c8}
.footer a:hover{color:#fff}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer .brand{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:20px;font-size:13px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#7f8aa3}
.footer-links{display:flex;flex-direction:column;gap:9px;font-size:14px}

/* ---------- 标签 / 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge-vip{background:linear-gradient(135deg,#f59e0b,#f97316);color:#fff}
.badge-free{background:var(--surface-2);color:var(--text-2)}
.badge-soft{background:var(--primary-soft);color:var(--primary)}
.badge-green{background:#dcfce7;color:#15803d}
.badge-red{background:#fee2e2;color:#b91c1c}
.badge-gray{background:#eef1f6;color:var(--text-2)}
.tag{display:inline-block;padding:3px 9px;border-radius:7px;background:var(--surface-2);color:var(--text-2);font-size:12px;margin:2px}

/* ---------- 进度条 ---------- */
.progress{height:8px;background:var(--line);border-radius:20px;overflow:hidden}
.progress > i{display:block;height:100%;background:var(--primary-grad);border-radius:20px}

/* ---------- 工具 / 资源 / 积分 ---------- */
.tool-card{aspect-ratio:1/1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;cursor:pointer}
.tool-card .ti{width:56px;height:56px;border-radius:16px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center}
.res-card{overflow:hidden}
.res-cover{height:150px;background:linear-gradient(135deg,#6366f1,#8b5cf6);display:grid;place-items:center;color:#fff;font-size:34px}
.res-cover img{width:100%;height:100%;object-fit:cover;display:block}
.res-card .body{padding:16px}
.pt-card{position:relative}
.pt-card .cost{position:absolute;top:14px;right:14px;background:var(--primary-soft);color:var(--primary);
  font-weight:700;padding:4px 10px;border-radius:20px;font-size:13px}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero p.lead{margin-left:auto;margin-right:auto}
  .hero-cta{justify-content:center}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .nav-toggle{display:block}
}
@media(max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero h1{font-size:36px}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
}

/* FTP 挂载表单控件(浅色，与后台 a-input 风格一致) */
.a-input{width:100%;padding:11px 14px;border-radius:10px;background:var(--surface);border:1px solid var(--line);color:var(--text);font-size:14px;font-family:inherit}
.a-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.a-label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:7px}

/* 教程卡片图标 */
.card .fic{width:46px;height:46px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;margin-bottom:12px}