/* ==========================================================================
   元经验企业官网 — 全局样式（C 案 · 暖调人文）
   风格基准：prototypes/style-c-nuandiao.html
   暖白底 / 暖橙主色 / 大圆角卡片 / 柔和投影
   ========================================================================== */

:root{
  /* 暖白底 */
  --cream:#fdfbf7;
  --cream-2:#f6f1e8;
  --cream-3:#efe7d9;
  --card:#fff;

  /* 暖褐文字 */
  --brown:#3d2f26;
  --brown-2:#6b574a;
  --brown-3:#9c8b7d;

  /* 主色：暖橙 */
  --amber:#c8862f;
  --amber-d:#a56c1e;
  --amber-l:#f0d9b0;
  --green:#4a7c59;
  --blue:#3a6ea5;

  --shadow:0 4px 14px rgba(61,47,38,.06);
  --shadow-lg:0 14px 40px rgba(61,47,38,.09);
  --sh-focus:0 0 0 3px rgba(200,134,47,.16);

  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}

body{
  font-family:var(--font);
  background:var(--cream);
  color:var(--brown);
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}

.wrap{max-width:1160px;margin:0 auto;padding:0 30px}

/* ==========================================================================
   导航
   ========================================================================== */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(253,251,247,.94);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--cream-3);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px}

.logo{display:flex;align-items:center;gap:11px}
.logo .cube{
  width:40px;height:40px;border-radius:11px;
  background:linear-gradient(135deg,var(--amber),#e0a954);
  display:grid;place-items:center;color:#fff;font-size:19px;font-weight:600;
  box-shadow:0 4px 12px rgba(200,134,47,.3);
}
.logo b{font-size:19px;letter-spacing:2px;display:block;line-height:1.3}
.logo span{font-size:11px;color:var(--brown-3);letter-spacing:1px;display:block;margin-top:-3px}

.menu{display:flex;gap:32px;font-size:14.5px;color:var(--brown-2)}
.menu a{position:relative;padding:4px 0;transition:color .2s}
.menu a:hover{color:var(--amber-d)}
.menu a.on{color:var(--brown)}
.menu a.on:after{content:"";position:absolute;left:0;bottom:-7px;width:100%;height:2px;background:var(--amber);border-radius:2px}

.btn-nav{
  background:var(--brown);color:var(--cream);
  font-size:14px;padding:10px 22px;border-radius:20px;
  transition:.25s;white-space:nowrap;
}
.btn-nav:hover{background:var(--amber-d)}

.burger{display:none;font-size:22px;color:var(--brown);background:none;border:0;cursor:pointer}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn{
  display:inline-block;
  padding:13px 30px;
  font-size:14.5px;font-family:var(--font);
  border-radius:24px;
  transition:.28s;
  cursor:pointer;
  border:1px solid transparent;
}
.btn-primary{background:var(--amber);color:#fff;box-shadow:0 8px 20px rgba(200,134,47,.3)}
.btn-primary:hover{background:var(--amber-d);transform:translateY(-2px);box-shadow:0 12px 26px rgba(200,134,47,.36)}

.btn-dark{background:var(--brown);color:var(--cream);box-shadow:0 8px 20px rgba(61,47,38,.22)}
.btn-dark:hover{background:var(--amber-d);transform:translateY(-2px)}

.btn-ghost{background:var(--card);border:1px solid var(--cream-3);color:var(--brown-2)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber-d)}

.btn-blue{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(58,110,165,.26)}
.btn-blue:hover{filter:brightness(.93);transform:translateY(-2px)}

.btn-block{display:block;width:100%;text-align:center;padding:14px;font-size:15px;letter-spacing:2px}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{padding:78px 0 72px;position:relative;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:center}

.tag{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--cream-3);color:var(--amber-d);
  font-size:12.5px;padding:6px 15px;border-radius:20px;margin-bottom:24px;
}
h1.hero-title{font-size:44px;line-height:1.3;font-weight:700;letter-spacing:-.3px}
h1.hero-title em{font-style:normal;color:var(--amber-d);position:relative}
h1.hero-title em:after{
  content:"";position:absolute;left:0;bottom:2px;width:100%;height:8px;
  background:rgba(200,134,47,.22);z-index:-1;
}
.hero-desc{margin:22px 0 34px;font-size:15.5px;color:var(--brown-2);max-width:520px;line-height:2}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap}

.hcard{
  background:var(--card);border-radius:20px;padding:28px;
  box-shadow:var(--shadow-lg);border:1px solid var(--cream-2);
}
.hcard .q{font-size:15px;line-height:1.95;color:var(--brown-2);padding-bottom:18px;border-bottom:1px dashed var(--cream-3)}
.hcard .q b{color:var(--brown);display:block;margin-bottom:8px;font-size:16.5px}
.hcard ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:11px}
.hcard li{font-size:13.5px;color:var(--brown-2);display:flex;align-items:flex-start;gap:9px}
.hcard li:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--amber);margin-top:9px;flex-shrink:0}

/* ==========================================================================
   Section 通用
   ========================================================================== */
section{padding:80px 0}
.alt{background:var(--cream-2)}

.sec-tag{font-size:12px;color:var(--amber-d);letter-spacing:2.5px;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.sec-tag:before{content:"";width:24px;height:2px;background:var(--amber);border-radius:2px}
.sec-tag.center{justify-content:center}

h2.sec-title{font-size:32px;font-weight:700;line-height:1.42;letter-spacing:-.2px}
.sec-title em{font-style:normal;color:var(--amber-d)}
.sec-sub{margin-top:14px;font-size:15px;color:var(--brown-2);max-width:700px;line-height:2}
.sec-head{margin-bottom:48px}

/* 内页头部 */
.page-head{padding:64px 0 54px;background:var(--cream)}
.page-head .crumb{font-size:13px;color:var(--brown-3);margin-bottom:18px}
.page-head .crumb a{color:var(--brown-3)}
.page-head .crumb a:hover{color:var(--amber-d)}
.page-head h1{font-size:38px;line-height:1.35;font-weight:700}
.page-head p{margin-top:16px;font-size:16px;color:var(--brown-2);max-width:760px;line-height:2}

/* ==========================================================================
   平台介绍（双卡）
   ========================================================================== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.sc{background:var(--card);border-radius:20px;padding:40px 36px;border:1px solid var(--cream-2);transition:.3s}
.sc:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.sc.hl{background:linear-gradient(160deg,#fffaf2,#fff);border-color:rgba(200,134,47,.25)}
.sc .ico{width:46px;height:46px;border-radius:14px;background:var(--cream-3);color:var(--amber-d);display:grid;place-items:center;font-size:21px;margin-bottom:18px}
.sc.hl .ico{background:linear-gradient(135deg,var(--amber),#e0a954);color:#fff;box-shadow:0 6px 16px rgba(200,134,47,.3)}
.sc h3{font-size:21px;margin-bottom:14px;font-weight:700}
.sc>p{font-size:14.5px;color:var(--brown-2);line-height:2}
.sc .points{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.sc .points div{font-size:13.5px;color:var(--brown-2);padding:11px 15px;background:var(--cream);border-radius:8px}

/* ==========================================================================
   功能卡片
   ========================================================================== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--cream-2);border-radius:18px;padding:32px 28px;transition:.3s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(200,134,47,.35)}
.card .top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.card .em{width:42px;height:42px;border-radius:12px;background:var(--cream-2);color:var(--amber-d);display:grid;place-items:center;font-size:19px}
.card .no{font-size:12px;color:var(--brown-3);letter-spacing:1.5px;font-weight:700}
.card h4{font-size:17.5px;margin-bottom:10px;font-weight:700}
.card p{font-size:13.5px;color:var(--brown-3);line-height:1.85}

/* 功能详情（内页左右分栏） */
.f-detail{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:var(--card);border:1px solid var(--cream-2);
  border-radius:22px;overflow:hidden;margin-bottom:22px;
  box-shadow:var(--shadow);transition:.3s;
}
.f-detail:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.f-detail-l{padding:38px 40px}
.f-detail-r{padding:38px 40px;background:var(--cream-2)}
.f-detail-l .n{font-size:13px;color:var(--brown-3);letter-spacing:2px;margin-bottom:12px}
.f-detail-l h3{font-size:24px;letter-spacing:.5px;margin-bottom:10px;font-weight:700}
.f-detail-l .en{font-size:11.5px;color:var(--brown-3);letter-spacing:1.5px;margin-bottom:18px;text-transform:uppercase}
.f-detail-l p{font-size:14.5px;color:var(--brown-2);line-height:2}
.f-detail-r h4{font-size:15px;color:var(--brown-3);letter-spacing:1px;margin-bottom:16px;font-weight:400}
.f-detail-r li{font-size:14px;color:var(--brown-2);padding:9px 0 9px 18px;position:relative;border-bottom:1px dashed var(--cream-3)}
.f-detail-r li:last-child{border-bottom:0}
.f-detail-r li:before{content:"";position:absolute;left:0;top:20px;width:7px;height:1px;background:var(--brown-3)}
.f-detail-r li b{color:var(--brown)}

/* ==========================================================================
   角色 + 流程
   ========================================================================== */
.roles{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.role{background:var(--card);border-radius:20px;padding:36px 34px;border:1px solid var(--cream-2);position:relative;overflow:hidden}
.role:after{content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;background:rgba(200,134,47,.07)}
.role .badge{font-size:12.5px;padding:5px 13px;border-radius:14px;display:inline-block;margin-bottom:16px;background:var(--green);color:#fff}
.role.role--stu .badge{background:var(--amber)}
.role h3{font-size:21px;margin-bottom:14px;font-weight:700}
.role ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.role li{font-size:14px;color:var(--brown-2);padding-left:18px;position:relative;line-height:1.9}
.role li:before{content:"▸";position:absolute;left:0;color:var(--amber)}

.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:44px}
.flow:before{content:"";position:absolute;top:26px;left:12%;right:12%;height:2px;background:linear-gradient(90deg,var(--amber),#e0a954);opacity:.28}
.fstep{text-align:center;position:relative;z-index:2;padding:0 12px}
.fstep .dot{
  width:52px;height:52px;margin:0 auto 16px;border-radius:50%;
  background:#fff;border:2px solid var(--amber);color:var(--amber);
  display:grid;place-items:center;font-weight:700;font-size:17px;
  box-shadow:0 0 0 6px var(--cream-2);
}
.fstep h5{font-size:15.5px;margin-bottom:7px;font-weight:700}
.fstep p{font-size:13px;color:var(--brown-3);padding:0 10px;line-height:1.85}

.flow-compact{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.flow-compact .card{text-align:center;padding:28px 18px}
.flow-compact .card .em{margin:0 auto 14px}

/* ==========================================================================
   双图卡
   ========================================================================== */
.duo-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}

/* ==========================================================================
   联系 / 表单
   ========================================================================== */
.contact-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:48px;align-items:start}

.cline{display:flex;gap:14px;padding:17px 0;border-bottom:1px solid var(--cream-3);align-items:flex-start}
.cline .d{width:38px;height:38px;border-radius:11px;background:var(--cream-2);color:var(--amber-d);display:grid;place-items:center;font-size:16px;flex-shrink:0}
.cline b{font-size:14.5px;display:block;font-weight:700}
.cline span{font-size:13.5px;color:var(--brown-3)}
.cline a{color:var(--blue);border-bottom:1px solid rgba(58,110,165,.3)}
.cline a:hover{color:var(--amber-d)}
/* 待填写项 */
.cline .pending-line{color:var(--brown-3);border-bottom:1px dashed var(--cream-3);cursor:help}

.form{background:var(--card);border-radius:22px;padding:36px;border:1px solid var(--cream-2);box-shadow:var(--shadow-lg)}
.form h3{font-size:21px;margin-bottom:5px;font-weight:700}
.form .tip{font-size:13.5px;color:var(--brown-3);margin-bottom:24px}

.fi{margin-bottom:15px}
.fi label{display:block;font-size:13px;color:var(--brown-2);margin-bottom:6px}
.fi label i{color:var(--amber-d);font-style:normal;margin-left:3px}
.fi input,.fi textarea,.fi select{
  width:100%;
  border:1px solid var(--cream-3);
  background:var(--cream);
  border-radius:12px;
  padding:12px 15px;
  font-size:14px;font-family:var(--font);
  color:var(--brown);
  transition:.2s;
}
.fi textarea{resize:vertical;min-height:100px;line-height:1.8}
.fi input::placeholder,.fi textarea::placeholder{color:var(--brown-3);opacity:.75}
.fi input:focus,.fi textarea:focus,.fi select:focus{outline:none;border-color:var(--amber);background:#fff;box-shadow:var(--sh-focus)}
.fi select{appearance:none;background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239c8b7d' stroke-width='1.4' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 15px center}
.fi-2{display:grid;grid-template-columns:1fr 1fr;gap:15px}

.chk{display:flex;align-items:flex-start;gap:9px;font-size:13.5px;color:var(--brown-2);margin-bottom:22px;cursor:pointer}
.chk input{width:15px;height:15px;margin-top:5px;accent-color:var(--amber);flex-shrink:0}

.form button[type="submit"]{
  width:100%;
  background:var(--amber);border:0;color:#fff;
  padding:14px;border-radius:24px;
  font-size:15px;font-weight:600;letter-spacing:3px;
  cursor:pointer;font-family:var(--font);
  transition:.28s;margin-top:6px;
  box-shadow:0 8px 20px rgba(200,134,47,.28);
}
.form button[type="submit"]:hover{background:var(--amber-d);transform:translateY(-2px)}

.form-note{margin-top:18px;font-size:13px;color:var(--brown-3);background:var(--cream);padding:14px 16px;border-radius:10px}
.form-note b{color:var(--blue)}

.form-ok{display:none;text-align:center;padding:36px 20px}
.form-ok.show{display:block}
.form-ok .tick{
  width:60px;height:60px;margin:0 auto 22px;border-radius:50%;
  background:linear-gradient(135deg,var(--amber),#e0a954);color:#fff;
  display:grid;place-items:center;font-size:27px;
  box-shadow:0 8px 20px rgba(200,134,47,.3);
}
.form-ok h4{font-size:21px;margin-bottom:10px;font-weight:700}
.form-ok p{font-size:14.5px;color:var(--brown-2);margin-bottom:6px}
.form-ok .mail{color:var(--blue);font-weight:700}

/* ==========================================================================
   页脚
   ========================================================================== */
footer{background:var(--brown);color:#b8a99b;padding:44px 0;font-size:13px}
.foot{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap;align-items:flex-start}
.foot b{color:var(--cream);font-size:15px;letter-spacing:2px;display:block;margin-bottom:4px;font-weight:700}
.foot-col b{display:block;font-size:13.5px;color:var(--cream);margin-bottom:10px;letter-spacing:1px;font-weight:700}
.foot-col a{display:block;color:#b8a99b;padding:4px 0}
.foot-col a:hover{color:var(--amber-l)}
.foot a:hover{color:var(--amber-l)}
.foot-record{text-align:right;font-size:12.5px;color:#9c8b7d;line-height:2}
/* 待填写项（公安备案号等）—— 淡色虚线下划线，一眼可辨 */
.foot-record .pending{color:#8a776a;border-bottom:1px dashed rgba(240,217,176,.35);cursor:help}
.foot-record .pending:hover{color:var(--amber-l)}

/* ==========================================================================
   文档页
   ========================================================================== */
.doc{max-width:840px}
.doc h2{font-size:24px;margin:44px 0 16px;font-weight:700;padding-bottom:12px;border-bottom:1px solid var(--cream-3)}
.doc h2:first-of-type{margin-top:0}
.doc p{font-size:15px;color:var(--brown-2);line-height:2;margin-bottom:14px}
.doc li{font-size:14.5px;color:var(--brown-2);padding:7px 0 7px 20px;position:relative;line-height:1.95}
.doc li:before{content:"";position:absolute;left:0;top:18px;width:7px;height:1px;background:var(--brown-3)}
.doc li b{color:var(--brown)}
.doc .hl{color:var(--amber-d)}
.doc .mail{color:var(--blue)}
.toc{background:var(--card);border-radius:18px;padding:24px 28px;margin-bottom:14px;border:1px solid var(--cream-2);box-shadow:var(--shadow)}
.toc b{font-size:15px;display:block;margin-bottom:12px}
.toc a{display:block;font-size:14px;color:var(--brown-2);padding:6px 0}
.toc a:hover{color:var(--amber-d)}

/* ==========================================================================
   移动端
   ========================================================================== */
@media(max-width:940px){
  .wrap{padding:0 20px}
  .menu{
    display:none;position:absolute;top:72px;left:0;right:0;
    background:var(--cream);border-bottom:1px solid var(--cream-3);
    flex-direction:column;gap:0;padding:8px 20px 16px;
    box-shadow:var(--shadow-lg);
  }
  .menu.open{display:flex}
  .menu a{padding:13px 0;border-bottom:1px solid var(--cream-3)}
  .menu a.on:after{display:none}
  .nav-in{position:relative}
  .burger{display:block}

  .hero{padding:52px 0}
  .hero-in{grid-template-columns:1fr;gap:36px}
  h1.hero-title{font-size:31px}
  h2.sec-title{font-size:25px}
  .page-head h1{font-size:27px}
  .page-head{padding:44px 0 38px}

  .split,.roles,.contact-grid,.cards,.duo-grid,.f-detail{grid-template-columns:1fr}
  .f-detail-r{padding:30px 26px}
  .f-detail-l{padding:30px 26px}
  .flow,.flow-compact{grid-template-columns:1fr 1fr;gap:24px}
  .flow:before{display:none}
  .fi-2{grid-template-columns:1fr}
  .form{padding:28px 22px}
  .sc{padding:32px 26px}
  footer .foot{flex-direction:column;align-items:flex-start}
  .foot-record{text-align:left}
}