/* ============================================================
   寻知科技 官网 - 紫色商务风设计系统
   主色 #534AB7 | 米白底 #f6f5f2 | 卡片式 | 响应式
   ============================================================ */

:root{
  --purple:#534AB7;
  --purple-dark:#3f3790;
  --purple-deep:#2c2670;
  --purple-light:#efeafe;
  --purple-soft:#f5f3ff;
  --accent:#F2A65A;        /* 暖金强调 */
  --accent-2:#7c6ff0;      /* 浅紫辅助 */
  --ink:#1f2133;
  --muted:#6b6f80;
  --line:#e7e4f1;
  --bg:#f6f5f2;
  --white:#ffffff;
  --ok:#2fae6a;
  --shadow:0 10px 30px rgba(83,74,183,.10);
  --shadow-lg:0 18px 50px rgba(83,74,183,.18);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,
        BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:17px;color:var(--purple-dark)}
.brand .logo-img{height:42px;width:auto;display:block}
.brand .brand-tag{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.5px;border-left:1px solid #e6e3f0;padding-left:12px;line-height:1.2}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.5px;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:9px 15px;border-radius:10px;font-weight:600;font-size:15px;color:var(--ink);
  transition:.18s;
}
.nav-links a:hover{background:var(--purple-soft);color:var(--purple)}
.nav-links a.active{background:var(--purple);color:#fff}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;background:none;border:0;font-size:24px;color:var(--purple);cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:12px;font-weight:700;font-size:15px;
  border:2px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap;
}
.btn-primary{background:var(--purple);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--purple-dark);transform:translateY(-1px)}
.btn-gold{background:var(--accent);color:#3a2a08}
.btn-gold:hover{filter:brightness(1.05);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--purple);color:var(--purple)}
.btn-ghost:hover{background:var(--purple-soft)}
.btn-light{background:#fff;color:var(--purple-dark)}
.btn-light:hover{background:var(--purple-soft)}
.btn-block{width:100%;justify-content:center}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 500px at 85% -10%,rgba(124,111,240,.45),transparent 60%),
    radial-gradient(700px 500px at 0% 110%,rgba(242,166,90,.28),transparent 55%),
    linear-gradient(160deg,var(--purple-deep),var(--purple) 55%,var(--accent-2));
  color:#fff;padding:84px 0 92px;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:42px 42px;opacity:.5;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%);
}
.hero .wrap{position:relative;z-index:2}
.hero .tag{
  display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.18;font-weight:900;letter-spacing:-.5px}
.hero h1 .hl{color:var(--accent)}
.hero p.lead{font-size:clamp(15px,2vw,19px);max-width:640px;margin:20px 0 30px;color:rgba(255,255,255,.9)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:46px}
.hero-stats .s b{font-size:30px;font-weight:900;display:block}
.hero-stats .s span{font-size:13px;color:rgba(255,255,255,.78)}

/* ---------- 区块 ---------- */
.section{padding:74px 0}
.section.tight{padding:54px 0}
.section-head{max-width:720px;margin:0 auto 40px;text-align:center}
.section-head .eyebrow{color:var(--purple);font-weight:800;letter-spacing:2px;font-size:13px;text-transform:uppercase}
.section-head h2{font-size:clamp(24px,3.4vw,36px);font-weight:900;margin:10px 0 12px;letter-spacing:-.4px}
.section-head p{color:var(--muted);font-size:16px}
.alt{background:var(--white)}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);transition:.22s;position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--accent-2)}
.card .ic{
  width:50px;height:50px;border-radius:13px;background:var(--purple-soft);color:var(--purple);
  display:grid;place-items:center;font-size:24px;font-weight:900;margin-bottom:16px;
}
.card h3{font-size:19px;margin-bottom:8px;font-weight:800}
.card p{color:var(--muted);font-size:15px}
.card .num{font-size:34px;font-weight:900;color:var(--purple);line-height:1}
.card .num small{font-size:15px;color:var(--muted);font-weight:700}

/* ---------- 标签 ---------- */
.pill{display:inline-block;padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:700;background:var(--purple-soft);color:var(--purple);margin:3px 4px 3px 0}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);position:absolute;top:18px;right:22px;font-size:34px;font-weight:900;color:var(--purple-light)}
.step .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--purple),var(--accent-2));color:#fff;display:grid;place-items:center;font-weight:900;font-size:20px;margin-bottom:14px}
.step h4{font-size:17px;margin-bottom:6px;font-weight:800}
.step p{color:var(--muted);font-size:14px}

/* ---------- 数据看板 ---------- */
.dash{display:grid;grid-template-columns:1.4fr 1fr;gap:22px}
.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.panel h4{font-size:16px;font-weight:800;margin-bottom:4px;display:flex;align-items:center;gap:8px}
.panel .sub{color:var(--muted);font-size:13px;margin-bottom:14px}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:8px}
.kpi{background:linear-gradient(135deg,var(--purple-soft),#fff);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px}
.kpi b{font-size:26px;font-weight:900;color:var(--purple-dark);display:block;line-height:1.1}
.kpi span{font-size:12.5px;color:var(--muted)}
.kpi .up{color:var(--ok);font-weight:700;font-size:12px}
.chart-box{width:100%}
.legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:middle}

/* ---------- 表格 ---------- */
.table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:14.5px}
.table th,.table td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
.table th{background:var(--purple);color:#fff;font-weight:700;font-size:14px}
.table tr:nth-child(even) td{background:var(--purple-soft)}
.table tr:hover td{background:#fff7ec}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700}
.badge.ok{background:#e6f7ee;color:var(--ok)}
.badge.warn{background:#fff1e0;color:#c8741a}
.badge.info{background:var(--purple-soft);color:var(--purple)}

/* ---------- 表单 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:14px;margin-bottom:7px}
.field input,.field textarea,.field select{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:11px;
  font-family:inherit;font-size:15px;background:#fff;color:var(--ink);transition:.18s;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--purple);box-shadow:0 0 0 3px var(--purple-soft)}
.field textarea{resize:vertical;min-height:120px}
.note{font-size:13px;color:var(--muted);margin-top:6px}
.form-msg{padding:12px 14px;border-radius:11px;font-size:14px;font-weight:600;margin-bottom:14px;display:none}
.form-msg.ok{display:block;background:#e6f7ee;color:var(--ok)}
.form-msg.err{display:block;background:#fdeaea;color:#c0392b}

/* ---------- 会员区 ---------- */
.auth-box{max-width:420px;margin:0 auto;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-lg)}
.tabs{display:flex;gap:8px;margin-bottom:20px}
.tabs button{flex:1;padding:11px;border:0;border-radius:11px;font-weight:700;font-size:15px;cursor:pointer;background:var(--purple-soft);color:var(--purple)}
.tabs button.active{background:var(--purple);color:#fff}
.member-grid{display:grid;grid-template-columns:260px 1fr;gap:22px}
.member-side{background:linear-gradient(160deg,var(--purple-deep),var(--purple));color:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.member-side .av{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;font-size:26px;font-weight:900;margin-bottom:14px}
.member-side h3{font-size:20px;margin-bottom:4px}
.member-side .role{background:rgba(255,255,255,.18);display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;margin-top:8px}
.member-menu{margin-top:18px;display:flex;flex-direction:column;gap:4px}
.member-menu a{padding:10px 12px;border-radius:10px;color:rgba(255,255,255,.85);font-weight:600;font-size:14.5px}
.member-menu a:hover{background:rgba(255,255,255,.14);color:#fff}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--purple),var(--accent-2));
  border-radius:22px;padding:44px;color:#fff;text-align:center;box-shadow:var(--shadow-lg);
}
.cta-band h2{font-size:clamp(22px,3vw,32px);font-weight:900;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.9);max-width:560px;margin:0 auto 24px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--purple-deep);color:rgba(255,255,255,.78);padding:54px 0 26px;margin-top:30px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:800}
.site-footer a{display:block;padding:5px 0;font-size:14px;color:rgba(255,255,255,.72)}
.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff;margin-bottom:12px;gap:10px}
.site-footer .brand .logo-img{height:36px;filter:brightness(0) invert(1);opacity:.95}
.site-footer .brand .brand-tag{color:rgba(255,255,255,.7);border-left-color:rgba(255,255,255,.25)}
.site-footer .desc{font-size:13.5px;line-height:1.7;max-width:300px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ---------- 面包屑/小标题 ---------- */
.page-hero{background:linear-gradient(160deg,var(--purple-deep),var(--purple));color:#fff;padding:54px 0 46px}
.page-hero h1{font-size:clamp(26px,4vw,40px);font-weight:900}
.page-hero p{color:rgba(255,255,255,.85);margin-top:10px;max-width:620px}

/* ---------- 提示条 ---------- */
.tip{background:var(--purple-soft);border:1px dashed var(--accent-2);border-radius:12px;padding:14px 16px;font-size:14px;color:var(--purple-dark);margin:18px 0}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .dash,.member-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .kpis{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-links{
    position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:12px 18px;border-bottom:1px solid var(--line);display:none;box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .grid-2,.grid-3,.grid-4,.steps{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:20px}
  .cta-band{padding:30px 20px}
}