/* =========================================================
   小球 · 网络安全社团  |  报名页（独立页面）
   与首页 / 登录页共用同一套设计变量
   ========================================================= */
:root{
  --blue-900:#16336B;
  --blue-800:#1E4488;
  --blue-700:#2557C9;
  --blue-600:#2E63D8;
  --blue-500:#3D7BF0;
  --blue-400:#5B90F5;
  --blue-300:#8FB4F2;
  --blue-200:#BFD8FF;
  --blue-100:#DDEAFF;
  --blue-50:#EFF5FF;

  --ink:#12224A;
  --ink-2:#3B4E77;
  --ink-3:#6B7C9E;

  --white:#fff;
  --radius-sm:14px;
  --radius:20px;
  --radius-lg:28px;
  --radius-pill:999px;

  --shadow-sm:0 6px 18px rgba(46,99,216,.08);
  --shadow:0 14px 34px rgba(46,99,216,.12);
  --shadow-lg:0 26px 60px rgba(31,79,190,.18);

  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
/* hidden 属性优先级最高：避免被 .btn{display:inline-flex} 之类的规则覆盖 */
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);line-height:1.6;
  min-height:100vh;min-height:100dvh;display:grid;place-items:center;padding:24px 20px;
  background:
    radial-gradient(900px 560px at 78% 4%,rgba(168,203,255,.5),rgba(233,241,255,0) 66%),
    linear-gradient(180deg,#F4F8FF 0%,#EAF2FF 48%,#E3EEFF 100%);
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul{margin:0}
ul{padding:0;list-style:none}
button{font:inherit}
.page-grid{
  position:fixed;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(120,164,232,.14) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(120,164,232,.14) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(110% 80% at 20% 18%,#000,rgba(0,0,0,.25) 52%,transparent 80%);
  mask-image:radial-gradient(110% 80% at 20% 18%,#000,rgba(0,0,0,.25) 52%,transparent 80%);
}

/* ---------- 卡片外壳 ---------- */
.page-card{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.42fr) minmax(0,.78fr);
  width:min(1080px,100%);
  border-radius:32px;background:#fff;overflow:hidden;
  box-shadow:0 40px 90px rgba(18,44,96,.26);
  animation:cardIn .5s cubic-bezier(.2,.8,.3,1);
}
@keyframes cardIn{from{opacity:0;transform:translateY(20px) scale(.98)}to{opacity:1;transform:none}}
.page-col{display:flex;flex-direction:column;min-width:0}
.page-top{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 46px 0;
}
.page-back{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--ink-3);transition:color .2s ease}
.page-back svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.page-back:hover{color:var(--blue-600)}
.page-step{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-3)}
.page-step b{color:var(--blue-600)}
.page-step i{display:block;width:34px;height:4px;border-radius:3px;background:linear-gradient(135deg,#5B90F5,#2C63DE)}

/* ---------- 表单主体 ---------- */
.form-main{padding:12px 46px 22px}
.form-head{display:flex;align-items:center;gap:14px}
.brand-mark{width:54px;height:54px;flex:none;display:grid;place-items:center}
.brand-mark img{width:100%;height:100%;object-fit:contain}
.form-title{font-size:23px;font-weight:900;color:var(--blue-900);letter-spacing:.6px}
.form-sub{margin-top:6px;font-size:13.5px;color:var(--ink-3)}

.form-body{display:grid;gap:12px;margin-top:18px}
.field{display:grid;gap:6px}
.field-label{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--ink-2)}
.field-label .req{color:#E06A66;font-weight:800}
.field-label .opt{font-size:12px;font-weight:600;color:#9AA8C0}
.field-hint{font-size:12.5px;color:var(--ink-3)}
.field-hint.is-warn{color:#D98A2B}
.field-hint.is-over{color:#D8524F;font-weight:700}

.field-input{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:0 14px;height:46px;border-radius:14px;
  background:#F7FAFF;border:1.5px solid #E4EDFB;
  transition:border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.field-input:focus-within{background:#fff;border-color:#8FB4F2;box-shadow:0 0 0 4px rgba(76,132,243,.14)}
.field-input > svg{width:18px;height:18px;flex:none;color:var(--blue-300);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.field-input input,.field-input select,.field-input textarea{
  flex:1;min-width:0;border:0;background:none;outline:none;font:inherit;font-size:14.5px;color:var(--ink);
}
.field-input input::placeholder,.field-input textarea::placeholder{color:#A8B6CE}
.field-input select{appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:26px}
.field-input .select-caret{position:absolute;right:16px;width:16px;height:16px;pointer-events:none;color:var(--ink-3);fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.field-input.is-textarea{align-items:flex-start;height:auto;padding:14px}
.field-input.is-textarea textarea{resize:vertical;min-height:88px;line-height:1.75}
.field-tagline{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip-tip{
  display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:8px;
  font-size:12px;font-weight:700;color:var(--blue-600);
  background:var(--blue-50);border:1px solid #DCE8FB;
}
.chip-tip svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.chip-tip-btn{
  border:1px solid #DCE8FB;cursor:pointer;font:inherit;font-size:12px;font-weight:700;
  transition:background-color .2s ease,border-color .2s ease,transform .2s ease;
}
.chip-tip-btn:hover{background:#E4EFFF;border-color:#C6D8F5;transform:translateY(-1px);text-decoration:underline}

/* 性别单选 */
.radio-row{display:flex;gap:12px;flex-wrap:wrap}
.radio-pill{position:relative;cursor:pointer}
.radio-pill input{position:absolute;opacity:0;width:0;height:0}
.radio-pill span{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-width:104px;height:44px;padding:0 22px;border-radius:14px;
  background:#F7FAFF;border:1.5px solid #E4EDFB;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:border-color .2s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.radio-pill span::before{
  content:"";width:16px;height:16px;border-radius:50%;
  border:1.6px solid #C6D8F5;background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.radio-pill:hover span{border-color:#C6D8F5;transform:translateY(-1px)}
.radio-pill input:checked + span{
  color:var(--blue-700);border-color:#8FB4F2;background:#fff;
  box-shadow:0 0 0 4px rgba(76,132,243,.14);
}
.radio-pill input:checked + span::before{
  border-color:var(--blue-500);
  box-shadow:inset 0 0 0 4px var(--blue-500);
}
.radio-pill input:focus-visible + span{box-shadow:0 0 0 4px rgba(76,132,243,.22)}

.form-error{
  min-height:20px;font-size:13px;font-weight:600;color:#D8524F;
  display:flex;align-items:center;gap:6px;
}
.form-error:empty{visibility:hidden}

.form-actions{display:flex;align-items:center;gap:14px;margin-top:4px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border:1px solid transparent;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;letter-spacing:.2px;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease;
}
.btn svg{width:19px;height:19px;flex:none}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,#5B90F5,#2C63DE 62%,#2455C8);
  box-shadow:0 12px 26px rgba(46,99,216,.32),inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(46,99,216,.4)}
.btn-ghost{color:var(--blue-600);background:#fff;border-color:#D7E4FA;box-shadow:var(--shadow-sm)}
.btn-ghost:hover{transform:translateY(-2px);border-color:#B8D0F7;box-shadow:var(--shadow)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-block{flex:1}

.agree{
  display:flex;align-items:flex-start;gap:10px;cursor:pointer;
  font-size:13px;line-height:1.65;color:var(--ink-3);
}
.agree input{position:absolute;opacity:0;width:0;height:0}
.agree i{
  width:18px;height:18px;flex:none;margin-top:1px;border-radius:6px;
  border:1.6px solid #C6D8F5;background:#fff;position:relative;
  transition:background-color .2s ease,border-color .2s ease;
}
.agree i::after{
  content:"";position:absolute;left:5px;top:1.5px;width:5px;height:9px;
  border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg) scale(0);
  transition:transform .18s ease;
}
.agree input:checked + i{background:linear-gradient(135deg,#5B90F5,#2C63DE);border-color:transparent}
.agree input:checked + i::after{transform:rotate(45deg) scale(1)}
.agree a{color:var(--blue-600);font-weight:700}

.is-shake{animation:shake .4s cubic-bezier(.36,.07,.19,.97)}
@keyframes shake{
  10%,90%{transform:translateX(-2px)}
  20%,80%{transform:translateX(4px)}
  30%,50%,70%{transform:translateX(-6px)}
  40%,60%{transform:translateX(6px)}
}

/* ---------- 右侧信息栏 ---------- */
.form-aside{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(520px 320px at 80% 0%,rgba(255,255,255,.3),transparent 62%),
    linear-gradient(150deg,#4E86F4,#2C63DE 58%,#1E4CB8);
}
.form-aside::after{
  content:"";position:absolute;right:-70px;bottom:-90px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.aside-inner{position:relative;z-index:2;padding:46px 40px;height:100%;display:flex;flex-direction:column;gap:20px}
.aside-badge{
  align-self:flex-start;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.34);
  font-size:12.5px;font-weight:700;letter-spacing:.4px;
}
.aside-inner h2{font-size:25px;font-weight:900;line-height:1.45;letter-spacing:.6px}
.aside-list{display:grid;gap:12px}
.aside-list li{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.94)}
.aside-list svg{width:24px;height:24px;flex:none;padding:4px;border-radius:50%;background:rgba(255,255,255,.2);fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.aside-card{
  margin-top:auto;padding:18px 20px;border-radius:20px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
}
.aside-card h3{font-size:14px;font-weight:800;letter-spacing:.4px}
.aside-card p{margin-top:8px;font-size:12.5px;line-height:1.75;color:rgba(255,255,255,.86)}
.aside-card .who{display:flex;align-items:center;gap:10px;margin-top:14px}
.aside-avatar{
  width:34px;height:34px;border-radius:50%;flex:none;display:grid;place-items:center;
  background-color:rgba(255,255,255,.22);font-size:14px;font-weight:800;
  background-size:cover;background-position:center;overflow:hidden;
}
.aside-avatar.has-img{background-color:transparent;box-shadow:0 0 0 2px rgba(255,255,255,.55)}
.aside-card b{font-size:14px}

/* 未登录时的内嵌登录 */
.need-auth{padding:8px 0 4px}
.need-auth h2{font-size:22px;font-weight:900;color:var(--blue-900);letter-spacing:.5px}
.need-auth > p{margin-top:10px;font-size:13.5px;line-height:1.8;color:var(--ink-3)}
.need-auth-form{display:grid;gap:16px;margin-top:22px}
.field.is-optional .req{opacity:.35}

/* 提交成功态 */
.done{
  display:none;padding:56px 46px 52px;text-align:center;
}
.done.is-on{display:block}
.done-ico{
  width:76px;height:76px;margin:0 auto;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,#E9F2FF,#D3E4FF);color:var(--blue-500);
}
.done-ico svg{width:38px;height:38px;fill:none;stroke:currentColor;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.done h2{margin-top:22px;font-size:24px;font-weight:900;color:var(--blue-900);letter-spacing:.6px}
.done p{margin-top:10px;font-size:14px;color:var(--ink-3)}
.done-card{
  margin:26px auto 0;max-width:420px;padding:22px 24px;text-align:left;
  border-radius:var(--radius-lg);background:#F7FAFF;border:1px solid #E6EFFD;
  display:grid;gap:12px;
}
.done-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;font-size:13.5px}
.done-row span{color:var(--ink-3);flex:none}
.done-row b{color:var(--blue-900);font-weight:700;text-align:right;word-break:break-all}
.done-bio b{font-weight:600;line-height:1.7;white-space:pre-wrap}
.done-actions{display:flex;gap:12px;justify-content:center;margin-top:26px;flex-wrap:wrap}

/* 提示 */
.toast{
  position:fixed;left:50%;bottom:calc(34px + env(safe-area-inset-bottom,0px));z-index:300;transform:translate(-50%,16px);
  display:flex;align-items:center;gap:10px;padding:13px 22px;border-radius:999px;
  background:rgba(16,38,80,.94);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 18px 40px rgba(12,36,84,.34);opacity:0;pointer-events:none;
  transition:opacity .26s ease,transform .26s ease;
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}
.toast::before{content:"";width:8px;height:8px;border-radius:50%;background:#6FE3A8}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  body{padding:0;place-items:stretch}
  .page-card{grid-template-columns:1fr;border-radius:0;width:100%;min-height:100%;box-shadow:none;animation:none}
  .form-aside{display:none}
  .page-top{padding:18px 22px 0}
  .form-main{padding:14px 22px 30px}
  .done{padding:44px 22px}
}
@media (max-width:600px){
  .form-main{padding:12px 16px calc(26px + env(safe-area-inset-bottom,0px))}
  .form-head{gap:12px}
  .brand-mark{width:46px;height:46px}
  .form-title{font-size:20px}
  .radio-pill span{min-width:0;flex:1;padding:0 16px}
  .radio-row{gap:10px}
  .form-actions{flex-direction:column-reverse;align-items:stretch}
  .form-actions .btn{width:100%}
  .field-input{height:50px}
  .toast{left:16px;right:16px;transform:translate(0,16px);justify-content:center;text-align:center}
  .toast.is-on{transform:translate(0,0)}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}

/* 审核状态横幅（服务器数据驱动） */
.review-banner{
  margin:0 0 18px;padding:14px 16px;border-radius:14px;font-size:13.5px;line-height:1.7;
  border:1px solid #DCE8FB;background:var(--blue-50);
}
.review-banner-head{display:flex;flex-direction:column;gap:4px}
.review-banner-head b{font-size:15px}
.review-banner-head span{color:var(--ink-3)}
.review-banner-remark{margin:8px 0 0;padding:8px 12px;border-radius:10px;background:rgba(255,255,255,.72);font-weight:700}
.review-banner.is-ok{background:#E7F8EE;border-color:#C4EBD3}
.review-banner.is-ok .review-banner-head b{color:#178A4C}
.review-banner.is-no{background:#F1F3F6;border-color:#E1E5EB}
.review-banner.is-no .review-banner-head b{color:#66707E}
.review-banner.is-wait{background:#FFF4E0;border-color:#F5DFB4}
.review-banner.is-wait .review-banner-head b{color:#9A6410}

/* 矮屏桌面端：进一步压缩，保证提交按钮一屏内可达 */
@media (min-width:961px) and (max-height:880px){
  body{padding:12px 20px}
  .form-main{padding:8px 46px 12px}
  .form-body{gap:9px;margin-top:12px}
  .field{gap:4px}
  .field-input{height:42px}
  .field-input.is-textarea textarea{min-height:60px}
  .radio-pill span{height:38px}
  .page-top{padding:10px 46px 0}
}