/* ============================================================
   卡网 · 视觉主题 v2
   现代 SaaS 风格：靛紫主色 + 柔和阴影 + 圆角 + 渐变点缀
   保留 v1 的全部类名，仅替换视觉层
   ============================================================ */
:root{
  /* 品牌 */
  --brand:#5B5BD6;
  --brand-2:#8B5CF6;
  --brand-3:#C0A6FF;
  --accent:#FF5A5F;
  --ok:#12B76A;

  /* 中性 */
  --bg:#F6F7FC;
  --surface:#FFFFFF;
  --text:#12131A;
  --text-2:#4B5468;
  --muted:#8A90A2;

  /* 兼容旧变量名（旧代码里用到 --ink / --ink-2 / --line-soft） */
  --ink:#12131A;
  --ink-2:#4B5468;
  --line-soft:#E8EAF2;

  /* 描边 */
  --border:#E4E7F2;
  --border-strong:#CDD3E6;

  /* 圆角与阴影 */
  --radius:14px;
  --radius-lg:20px;
  --radius-pill:999px;
  --shadow-xs:0 1px 2px rgba(18,19,26,.05);
  --shadow-sm:0 2px 8px rgba(18,19,26,.06), 0 1px 2px rgba(18,19,26,.04);
  --shadow-md:0 10px 28px rgba(24,26,54,.09), 0 2px 6px rgba(24,26,54,.05);
  --shadow-lg:0 22px 54px rgba(24,26,54,.14), 0 4px 12px rgba(24,26,54,.06);
  --shadow-brand:0 12px 28px rgba(91,91,214,.28);

  --max:1140px;
  --font:"Inter","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Courier New",monospace;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{overflow-x:hidden;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:15px/1.7 var(--font);-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 480px at 12% -8%, rgba(139,92,246,.13), transparent 62%),
    radial-gradient(760px 420px at 92% 2%, rgba(91,91,214,.12), transparent 60%);
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.015em;line-height:1.25}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;font-size:14.5px;font-weight:650;border-radius:var(--radius-pill);
  border:1px solid var(--border);background:var(--surface);color:var(--text);
  box-shadow:var(--shadow-xs);
  transition:transform .18s cubic-bezier(.2,.8,.3,1), box-shadow .18s, background .18s, border-color .18s, color .18s;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:var(--border-strong);background:#fff}
.btn:active{transform:translateY(0)}
.btn--solid{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
  color:#fff;border-color:transparent;box-shadow:var(--shadow-brand);
}
.btn--solid:hover{box-shadow:0 16px 34px rgba(91,91,214,.36);background:linear-gradient(135deg,#6666E0 0%,#9A69FF 100%)}
.btn--ghost{background:rgba(255,255,255,.6);border-color:var(--border-strong);color:var(--text-2);backdrop-filter:blur(6px)}
.btn--ghost:hover{color:var(--brand);border-color:var(--brand-3);background:#fff}
.btn--block{width:100%}
.btn--sm{padding:9px 16px;font-size:13.5px}
.btn[disabled]{opacity:.5;pointer-events:none;filter:grayscale(.2)}

/* ---------------- 表单 ---------------- */
.field{margin-bottom:20px}
.field__label{display:flex;align-items:baseline;gap:6px;font-size:13.5px;font-weight:650;color:var(--text);margin-bottom:8px}
.field__label .req{color:var(--accent)}
.field__hint{font-size:12.5px;color:var(--muted);margin-top:7px;line-height:1.6}
.input{
  width:100%;padding:13px 15px;border-radius:12px;border:1.5px solid var(--border);
  background:var(--surface);outline:none;color:var(--text);
  transition:border-color .16s, box-shadow .16s, background .16s;
}
.input::placeholder{color:#AEB4C4}
.input:hover{border-color:var(--border-strong)}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(91,91,214,.13);background:#fff}
.input.is-error{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,90,95,.1)}
.input-group{display:flex;gap:10px}
.input-group .input{flex:1;min-width:0}

.err{display:none;font-size:12.5px;margin-top:7px;font-weight:600;color:var(--accent)}
.err::before{content:"⚠ "}
.field.has-error .err{display:block}
.field.has-error .input{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,90,95,.1)}

/* ---------------- 身份卡 ---------------- */
.radio-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.radio-card{
  position:relative;display:block;padding:16px;border-radius:var(--radius);
  border:1.5px solid var(--border);background:var(--surface);cursor:pointer;
  transition:border-color .18s, box-shadow .18s, transform .18s, background .18s;
}
.radio-card:hover{border-color:var(--brand-3);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.radio-card input{position:absolute;opacity:0;inset:0;cursor:pointer}
.radio-card__t{font-weight:750;font-size:14.5px;display:flex;align-items:center;gap:9px}
.radio-card__t::before{
  content:"";width:17px;height:17px;border-radius:50%;flex:none;
  border:2px solid var(--border-strong);background:#fff;transition:.18s;
}
.radio-card__d{font-size:12.5px;color:var(--text-2);margin-top:7px;line-height:1.65}
.radio-card:has(input:checked){
  border-color:var(--brand);background:linear-gradient(180deg,rgba(91,91,214,.055),rgba(139,92,246,.03));
  box-shadow:0 0 0 4px rgba(91,91,214,.1), var(--shadow-sm);
}
.radio-card:has(input:checked) .radio-card__t::before{
  border-color:var(--brand);background:var(--brand);box-shadow:inset 0 0 0 3.5px #fff;
}
.radio-card:has(input:focus-visible){outline:2px solid var(--brand);outline-offset:3px}

/* ---------------- 步骤条 ---------------- */
.steps{
  display:flex;align-items:center;gap:10px;margin:0 0 26px;padding:0;list-style:none;flex-wrap:wrap;
}
.steps li{
  display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);
  padding:7px 16px 7px 8px;border-radius:var(--radius-pill);
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-xs);
}
.steps li+li::before{content:"";display:none}
.steps li.on{color:var(--brand);font-weight:700;border-color:rgba(91,91,214,.3);background:rgba(91,91,214,.06);box-shadow:none}
.steps .n{
  display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;
  border-radius:50%;font-size:12px;font-weight:800;
  background:#EEF0F8;color:var(--muted);
}
.steps li.on .n{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}

/* ---------------- 验证码 ---------------- */
.captcha{display:flex;align-items:center;gap:10px}
.captcha canvas{
  border-radius:12px;border:1.5px solid var(--border);display:block;cursor:pointer;flex:none;
  background:#FBFBFE;transition:border-color .16s;
}
.captcha canvas:hover{border-color:var(--brand-3)}
.captcha__tip{font-size:12px;color:var(--muted)}
.captcha__box{width:118px;height:44px;flex:none;cursor:pointer;border-radius:10px;overflow:hidden;box-shadow:0 0 0 1.5px var(--border);transition:box-shadow .16s}
.captcha__box:hover{box-shadow:0 0 0 2px var(--brand-3)}
.captcha__box svg{display:block;width:100%;height:100%}

/* ---------------- 密码强度 ---------------- */
.strength{display:flex;gap:6px;margin-top:9px;align-items:center}
.strength__bar{height:5px;flex:1;border-radius:var(--radius-pill);background:#EBEEF7;transition:background .2s}
.strength__bar.on{background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.strength__txt{font-size:11.5px;font-weight:750;width:46px;text-align:right;color:var(--text-2)}

/* ---------------- 协议 ---------------- */
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-2);line-height:1.65;cursor:pointer}
.check input{
  margin:2px 0 0;width:17px;height:17px;flex:none;accent-color:var(--brand);
  border-radius:4px;
}
.check a{text-decoration:none;font-weight:650;color:var(--brand);border-bottom:1px solid rgba(91,91,214,.3)}
.check a:hover{border-bottom-color:var(--brand)}
.check.has-error{color:var(--accent)}
.check.has-error a{color:var(--accent);border-bottom-color:var(--accent)}

/* ---------------- 顶部导航 ---------------- */
.topbar{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--border);
}
.topbar__in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:850;font-size:17.5px;letter-spacing:-.01em}
.logo__mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:14px;font-weight:850;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 6px 14px rgba(91,91,214,.32);
}
.topnav{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2)}
.topnav a{padding:9px 13px;border-radius:10px;transition:.16s;font-weight:550}
.topnav a:hover{background:rgba(91,91,214,.08);color:var(--brand)}

/* ---------------- 页脚 ---------------- */
.foot{margin-top:64px;padding:30px 0 40px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.foot__row{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between}
.foot a:hover{color:var(--brand)}

/* ---------------- 首屏 ---------------- */
.hero{
  position:relative;overflow:hidden;margin:0;padding:74px 0 64px;
  background:linear-gradient(150deg,#101026 0%,#1A1740 46%,#241A56 100%);
  color:#fff;
}
.hero::before{
  content:"";position:absolute;width:620px;height:620px;right:-140px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(139,92,246,.55),transparent 66%);filter:blur(6px);
}
.hero::after{
  content:"";position:absolute;width:520px;height:520px;left:-180px;bottom:-280px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,91,214,.5),transparent 68%);
}
.hero .wrap{position:relative;z-index:2}
.hero__t{font-size:clamp(28px,4.6vw,48px);line-height:1.16;letter-spacing:-.03em;max-width:16em;font-weight:850}
.hero__t em{
  font-style:normal;
  background:linear-gradient(100deg,#C6B4FF 0%,#9F7BFF 40%,#7DD3FC 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__s{font-size:15.5px;color:rgba(255,255,255,.72);margin-top:18px;max-width:36em;line-height:1.85}
.hero__btns{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero__btns .btn{padding:15px 30px;font-size:15.5px}
.hero__btns .btn:not(.btn--solid){
  background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.28);
  box-shadow:none;backdrop-filter:blur(8px);
}
.hero__btns .btn:not(.btn--solid):hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.5)}
.hero__meta{display:flex;gap:14px;margin-top:40px;flex-wrap:wrap}
.hero__meta div{
  padding:14px 20px;border-radius:var(--radius);min-width:150px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);
  backdrop-filter:blur(10px);
}
.hero__meta b{display:block;font-size:22px;font-family:var(--font);font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(100deg,#fff,#C6B4FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__meta span{font-size:12.5px;color:rgba(255,255,255,.6)}

/* ---------------- 区块 ---------------- */
.sec{padding:56px 0}
.sec__h{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:24px}
.sec__h h2{font-size:22px;letter-spacing:-.02em}
.sec__h span{font-size:12.5px;color:var(--muted)}

/* 入口卡 */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.entry{
  position:relative;display:flex;flex-direction:column;gap:10px;padding:26px 24px;
  border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .22s cubic-bezier(.2,.8,.3,1), box-shadow .22s, border-color .22s;
}
.entry::after{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .22s;pointer-events:none;
  background:linear-gradient(160deg,rgba(91,91,214,.07),rgba(139,92,246,.02) 60%,transparent);
}
.entry:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--brand-3)}
.entry:hover::after{opacity:1}
.entry__tag{
  position:absolute;top:0;right:0;padding:5px 12px;font-size:11px;font-weight:750;letter-spacing:.06em;
  color:#fff;border-radius:0 var(--radius-lg) 0 12px;
  background:linear-gradient(135deg,var(--accent),#FF8A5B);
}
.entry__n{font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.06em}
.entry__t{font-size:19px;font-weight:800;letter-spacing:-.02em}
.entry__d{font-size:13.5px;color:var(--text-2);line-height:1.72;flex:1}
.entry__go{
  font-size:13.5px;font-weight:700;color:var(--brand);padding-top:13px;
  border-top:1px solid var(--border);display:flex;align-items:center;gap:6px;
}
.entry:hover .entry__go{gap:10px}

/* 四步流程 */
.flow4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.flow4__i{
  position:relative;padding:22px 20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-xs);
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
.flow4__i:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-3)}
.flow4__i::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));opacity:.85;
}
.flow4__n{font-size:11.5px;font-weight:800;color:var(--brand-3);letter-spacing:.1em;margin-bottom:7px}
.flow4__t{font-weight:750;font-size:15px;margin-bottom:6px}
.flow4__d{font-size:12.5px;color:var(--text-2);line-height:1.65}

/* 商品 */
.goods{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.goods__c{
  display:flex;flex-direction:column;gap:9px;padding:16px;border-radius:var(--radius-lg);
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);
  transition:transform .22s, box-shadow .22s, border-color .22s;
}
.goods__c:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--brand-3)}
.goods__ph{
  aspect-ratio:1/1;border-radius:12px;display:grid;place-items:center;
  font-size:12px;font-weight:700;color:rgba(255,255,255,.86);letter-spacing:.08em;
  background:linear-gradient(140deg,#5B5BD6 0%,#8B5CF6 52%,#B18CFF 100%);
  box-shadow:inset 0 -20px 40px rgba(0,0,0,.12);
}
.goods__t{font-size:14.5px;font-weight:700}
.goods__p{font-size:20px;font-weight:850;letter-spacing:-.02em;color:var(--text)}
.goods__p small{font-size:11.5px;color:var(--muted);font-weight:500}

/* 公告 */
.notice{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-xs);font-size:13.5px;line-height:1.75;color:var(--text-2);
  border-left:4px solid var(--brand);
}
.notice b{display:block;margin-bottom:4px;color:var(--text);font-size:14px}

/* ---------------- 认证页 ---------------- */
.auth{padding:44px 0 20px}
.auth__grid{
  display:grid;grid-template-columns:minmax(0,500px) minmax(0,1fr);
  gap:40px;align-items:start;max-width:100%;
}
.auth__grid>*{min-width:0}
.auth__aside{
  padding:26px 28px;border-radius:var(--radius-lg);
  background:linear-gradient(170deg,rgba(91,91,214,.055),rgba(139,92,246,.025));
  border:1px solid var(--border);
}
.auth__aside h3{font-size:14.5px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.auth__aside h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
.tips{list-style:none;padding:0;margin:0 0 22px}
.tips li{position:relative;padding-left:22px;font-size:13.5px;color:var(--text-2);margin-bottom:11px;line-height:1.7}
.tips li::before{
  content:"";position:absolute;left:6px;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-3);
}
.tips li b{color:var(--text)}
.kv{border-top:1px solid var(--border);margin-top:6px;padding-top:4px;min-width:0}
.kv div{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:10px 0;border-bottom:1px solid var(--border);font-size:13px;color:var(--text-2);
}
.kv div:last-child{border-bottom:0}
.kv b{font-weight:750;color:var(--text);white-space:nowrap}

/* 卡片 */
.card{
  padding:30px;border-radius:var(--radius-lg);
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-md);
}
.card__title{font-size:19px;font-weight:800;letter-spacing:-.02em;margin-bottom:6px}
.card__sub{font-size:13.5px;color:var(--text-2);margin-bottom:24px;line-height:1.7}

/* 完成态 */
.done{text-align:center;padding:22px 0 8px}
.done__ico{
  width:64px;height:64px;border-radius:50%;margin:0 auto 18px;display:grid;place-items:center;
  font-size:28px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#12B76A,#34D399);
  box-shadow:0 14px 30px rgba(18,183,106,.32);
}
.done__t{font-size:22px;font-weight:850;letter-spacing:-.02em}
.done__d{font-size:14px;color:var(--text-2);margin:10px auto 24px;max-width:30em;line-height:1.75}
.done__btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Toast */
.toast{
  position:fixed;left:50%;bottom:38px;transform:translate(-50%,16px) scale(.98);
  padding:13px 22px;border-radius:var(--radius-pill);font-size:13.5px;font-weight:600;
  background:rgba(18,19,26,.94);color:#fff;box-shadow:var(--shadow-lg);
  opacity:0;pointer-events:none;transition:.26s cubic-bezier(.2,.8,.3,1);z-index:99;max-width:86vw;
  backdrop-filter:blur(10px);
}
.toast.show{opacity:1;transform:translate(-50%,0) scale(1)}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D7DBE9;border-radius:8px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#C2C8DD}

/* ---------------- 响应式 ---------------- */
@media (max-width:960px){
  .entry-grid,.goods{grid-template-columns:1fr 1fr}
  .flow4{grid-template-columns:1fr 1fr}
  .auth__grid{grid-template-columns:1fr;gap:26px}
  .hero{padding:52px 0 44px}
  .hero__meta div{min-width:132px;padding:12px 16px}
}
@media (max-width:600px){
  body{font-size:14.5px}
  .wrap{padding:0 18px}
  .topnav .hide-sm{display:none}
  .hero{padding:40px 0 36px}
  .hero__s{font-size:14.5px}
  .hero__btns{flex-direction:column}
  .hero__btns .btn{width:100%;padding:14px 20px}
  .hero__meta{gap:10px}
  .hero__meta div{flex:1 1 calc(50% - 10px);min-width:0}
  .entry-grid,.goods,.radio-cards,.flow4{grid-template-columns:1fr}
  .steps{gap:8px}
  .steps li{font-size:12.5px;padding:6px 12px 6px 7px}
  .card{padding:22px}
  .auth__aside{padding:20px}
  .sec{padding:38px 0}
  .sec__h h2{font-size:19px}
  .foot{margin-top:40px}
}