/* 科技蓝 · 政务风 —— 问卷前端样式 */
:root{
  --navy:#123a5e;
  --navy-2:#0f3253;
  --blue:#1f5a8a;
  --blue-bright:#2e7fc4;
  --blue-soft:#eaf2f8;
  --blue-line:#d6e3f0;
  --bg:#f4f7fa;
  --panel:#ffffff;
  --line:#e5eaf0;
  --ink:#1f2a37;
  --muted:#6b7686;
  --ok:#1f9d6b;
  --gold:#b28b42;
  --radius:14px;
  --shadow:0 6px 22px rgba(18,58,94,.08);
  --shadow-sm:0 2px 10px rgba(18,58,94,.06);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
.app{max-width:560px;margin:0 auto;min-height:100vh;background:var(--bg);position:relative}
.hidden{display:none !important}

/* 顶部进度栏 */
.topbar{
  position:sticky;top:0;z-index:20;
  background:linear-gradient(135deg,var(--navy),var(--blue));
  color:#fff;padding:14px 18px 16px;
  box-shadow:0 2px 12px rgba(15,50,83,.22);
}
.topbar .tb-title{font-size:14px;opacity:.92;display:flex;justify-content:space-between;align-items:center}
.topbar .tb-step{font-weight:600}
.progress{margin-top:10px;height:6px;border-radius:6px;background:rgba(255,255,255,.24);overflow:hidden}
.progress > i{display:block;height:100%;width:25%;border-radius:6px;background:#fff;transition:width .35s ease}
.steps-dots{display:flex;gap:6px;margin-top:10px}
.steps-dots span{flex:1;text-align:center;font-size:12px;opacity:.72;position:relative;padding-top:4px}
.steps-dots span.active{opacity:1;font-weight:600}

/* 页面容器 */
.screen{padding:18px 16px 120px}

/* 首页 */
.hero{
  background:linear-gradient(150deg,var(--navy),var(--blue) 88%);
  color:#fff;border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.hero:after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.06)}
.hero .badge{display:inline-block;font-size:12px;letter-spacing:1px;background:rgba(255,255,255,.16);padding:4px 12px;border-radius:20px;margin-bottom:14px}
.hero h1{font-size:22px;line-height:1.45;margin:0 0 10px;font-weight:700}
.hero .sub{font-size:13.5px;opacity:.9;margin:0}
.hero .meta{margin-top:16px;font-size:13px;opacity:.9;display:flex;align-items:center;gap:6px}

.section{margin-top:18px}
.section-title{font-size:15px;font-weight:700;color:var(--navy);margin:0 0 12px;padding-left:11px;border-left:4px solid var(--blue-bright);line-height:1.3}
.intro-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 6px;box-shadow:var(--shadow-sm)}
.intro-card p{margin:0 0 12px;font-size:14.5px;color:#38434f}

.value-cards{display:grid;grid-template-columns:1fr;gap:10px}
.vcard{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;display:flex;gap:12px;align-items:flex-start;box-shadow:var(--shadow-sm)}
.vcard .ico{flex:0 0 40px;height:40px;border-radius:10px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center}
.vcard .ico svg{width:22px;height:22px}
.vcard h3{margin:0 0 3px;font-size:14.5px;color:var(--navy)}
.vcard p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.5}

.privacy-tip{margin-top:16px;font-size:12px;color:var(--muted);background:var(--blue-soft);border-radius:10px;padding:10px 12px;display:flex;gap:8px;align-items:flex-start}
.privacy-tip svg{flex:0 0 15px;margin-top:2px}

/* 题目 */
.q{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 8px;margin-bottom:14px;box-shadow:var(--shadow-sm)}
.q-head{display:flex;gap:8px;margin-bottom:4px}
.q-no{flex:0 0 auto;font-size:12px;font-weight:700;color:#fff;background:var(--blue);border-radius:6px;padding:2px 8px;height:22px;line-height:18px}
.q-title{font-size:15.5px;font-weight:600;color:var(--ink);line-height:1.5}
.q-title .req{color:#d94b4b;margin-left:2px}
.q-sub{font-size:12.5px;color:var(--muted);margin:4px 0 10px}
.q-limit{display:inline-block;font-size:11.5px;color:var(--blue);background:var(--blue-soft);border-radius:20px;padding:2px 10px;margin:2px 0 10px}

.opts{display:flex;flex-direction:column;gap:9px;margin-top:6px}
.opt{
  display:flex;align-items:center;gap:11px;
  border:1.5px solid var(--line);border-radius:11px;
  padding:12px 14px;cursor:pointer;transition:all .16s;background:#fff;
  font-size:14.5px;color:#333;user-select:none;
}
.opt:active{transform:scale(.995)}
.opt .mark{flex:0 0 20px;width:20px;height:20px;border:2px solid #c4cdd8;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .16s}
.opt.multi .mark{border-radius:6px}
.opt .mark svg{width:12px;height:12px;opacity:0;transform:scale(.6);transition:all .16s;color:#fff}
.opt.checked{border-color:var(--blue-bright);background:var(--blue-soft)}
.opt.checked .mark{background:var(--blue-bright);border-color:var(--blue-bright)}
.opt.checked .mark svg{opacity:1;transform:scale(1)}
.opt.disabled{opacity:.45;pointer-events:none}
.opt-text{flex:1}
.other-input{margin:-2px 0 4px;padding:0 2px}
.other-input input{width:100%;border:1.5px solid var(--blue-line);border-radius:9px;padding:9px 11px;font-size:14px;outline:none}
.other-input input:focus{border-color:var(--blue-bright)}

/* 表单字段 */
.field{margin-bottom:15px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin-bottom:7px}
.field label .req{color:#d94b4b;margin-left:2px}
.field label .opt-tag{font-weight:400;color:var(--muted);font-size:12px;margin-left:6px}
.field input,.field textarea{
  width:100%;border:1.5px solid var(--line);border-radius:11px;
  padding:12px 14px;font-size:15px;outline:none;transition:border .16s;background:#fff;
  font-family:inherit;color:var(--ink);
}
.field input:focus,.field textarea:focus{border-color:var(--blue-bright);box-shadow:0 0 0 3px rgba(46,127,196,.1)}
.field textarea{resize:vertical;min-height:92px}
.field .count{text-align:right;font-size:11.5px;color:var(--muted);margin-top:4px}
.field.err input,.field.err textarea{border-color:#e0736f}

/* 底部操作栏 */
.footer{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  display:flex;gap:12px;max-width:560px;margin:0 auto;
}
.btn{
  flex:1;border:none;border-radius:12px;padding:14px;font-size:16px;font-weight:600;
  cursor:pointer;transition:all .16s;font-family:inherit;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-bright));color:#fff;box-shadow:0 4px 14px rgba(31,90,138,.28)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{flex:0 0 96px;background:#fff;border:1.5px solid var(--line);color:var(--navy)}
.btn:disabled{opacity:.6;pointer-events:none}
.btn-block{width:100%}

/* 提交完成页 */
.done{padding:40px 22px 60px;text-align:center}
.done .check{width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,var(--ok),#27b57e);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;box-shadow:0 8px 22px rgba(31,157,107,.32)}
.done .check svg{width:40px;height:40px;color:#fff}
.done h2{font-size:21px;color:var(--navy);margin:0 0 8px}
.done .lead-badge{display:inline-block;font-size:12px;color:var(--blue);background:var(--blue-soft);border-radius:20px;padding:4px 14px;margin-bottom:16px}
.done .done-text{text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm);margin-bottom:18px}
.done .done-text p{margin:0 0 10px;font-size:13.5px;color:#48535f;line-height:1.6}
.done .done-text p:last-child{margin-bottom:0}
.contact-card{background:linear-gradient(150deg,var(--navy),var(--blue));color:#fff;border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow)}
.contact-card .ct-title{font-size:13px;opacity:.85;margin-bottom:12px}
.contact-card .qr{width:150px;height:150px;background:#fff;border-radius:12px;margin:0 auto 14px;padding:8px;display:flex;align-items:center;justify-content:center}
.contact-card .qr img{width:100%;height:100%;object-fit:contain;border-radius:6px}
.contact-card .qr .ph{color:#9aa7b5;font-size:12px;text-align:center;line-height:1.5}
.contact-card .ct-row{font-size:15px;margin:4px 0;font-weight:600}
.contact-card .ct-row small{font-weight:400;opacity:.8}

/* 提示浮层 */
.toast{
  position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);z-index:60;
  background:rgba(30,42,55,.94);color:#fff;padding:12px 20px;border-radius:12px;
  font-size:14px;max-width:80%;text-align:center;opacity:0;transition:opacity .2s;pointer-events:none;
}
.toast.show{opacity:1}

.loading{padding:80px 20px;text-align:center;color:var(--muted)}
.spinner{width:34px;height:34px;border:3px solid var(--blue-line);border-top-color:var(--blue-bright);border-radius:50%;margin:0 auto 14px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}