/* ---------- 区块 ---------- */
.sec{margin-top:30px}
.sec__head{display:flex; align-items:center; gap:10px; height:28px; margin-bottom:12px}
.sec__head h2{font-family:var(--f-display); font-weight:900; font-size:20px; letter-spacing:.01em}
.sec__num{position:relative; width:25px; height:28px; border-radius:13px 13px 6px 6px; flex:none;
  box-shadow:inset 0 0 0 1.5px var(--ink); display:grid; place-items:center; transition:background .25s var(--ease-out), box-shadow .25s}
.sec__num b{font-size:13px; font-weight:700; line-height:1; margin-top:3px; transition:opacity .15s, transform .25s}
.sec__num svg{position:absolute; left:2.5px; top:5px; width:20px; height:20px; color:#fff; opacity:0; transform:scale(.4); transition:opacity .2s, transform .3s var(--ease-spring)}
.sec.is-done .sec__num{background:var(--cobalt); box-shadow:inset 0 0 0 1.5px var(--cobalt)}
.sec.is-done .sec__num b{opacity:0; transform:scale(.4)}
.sec.is-done .sec__num svg{opacity:1; transform:scale(1)}
.sec__note{margin-left:auto; display:inline-flex; align-items:center; gap:5px; font-size:13px; color:var(--ink-3)}
.sec__note svg{width:16px; height:16px}

.grid{display:grid; column-gap:12px}
.g-2{grid-template-columns:1fr 1fr}
.g-3{grid-template-columns:1fr 1fr 1fr}
.g-card{grid-template-columns:1fr 112px 92px}

/* ---------- 字段 ---------- */
.field{position:relative; min-width:0}
.field > label, .field > #lRegion{display:block; font-size:13px; font-weight:600; color:var(--ink-2); line-height:18px; margin-bottom:6px}
.control{position:relative; height:50px; border-radius:12px; background:var(--white);
  box-shadow:inset 0 0 0 1px var(--line); transition:box-shadow .16s, background .16s}
.control:hover{box-shadow:inset 0 0 0 1px var(--line-2)}
.control input,.control select{-webkit-appearance:none; appearance:none; width:100%; height:100%; border:0; outline:0; background:transparent; padding:0 42px 0 14px; border-radius:12px;
  font-size:15px; caret-color:var(--cobalt); font-variant-numeric:tabular-nums; text-overflow:ellipsis}
.control input::placeholder{color:#9A9DB0; font-weight:400}
.control:focus-within{box-shadow:inset 0 0 0 1.5px var(--cobalt), 0 0 0 4px var(--ring); background:var(--white)}

.field.is-ok .control{background:#F7F9FF}
.field.is-err .control{background:var(--tomato-tint); box-shadow:inset 0 0 0 1.5px var(--tomato)}
.field.is-err .control:focus-within{box-shadow:inset 0 0 0 1.5px var(--tomato), 0 0 0 4px rgba(223,62,38,.18)}
.field.is-err > label{color:var(--tomato-t)}
.field.nudge .control{animation:nudge .34s var(--ease-out)}
@keyframes nudge{0%{transform:translateX(0)}22%{transform:translateX(-5px)}50%{transform:translateX(3.5px)}78%{transform:translateX(-1.5px)}100%{transform:translateX(0)}}

.mark{position:absolute; right:12px; top:50%; width:22px; height:22px; margin-top:-11px; border-radius:50%; display:grid; place-items:center;
  color:#fff; opacity:0; transform:scale(.4); transition:opacity .16s, transform .3s var(--ease-spring); pointer-events:none}
.mark svg{width:20px; height:20px}
.field.is-ok .mark{opacity:1; transform:scale(1); background:var(--cobalt)}
.field.is-err .mark{opacity:1; transform:scale(1); background:var(--tomato)}
.field.is-err .control:focus-within .mark{opacity:1}

.msg{min-height:22px; padding-top:4px; font-size:13px; line-height:18px; color:var(--tomato-t); opacity:0; transform:translateY(-3px); transition:opacity .18s, transform .24s var(--ease-out)}
.field.is-err .msg{opacity:1; transform:none}
.field[data-field="exp"] .msg,.field[data-field="cvc"] .msg{white-space:nowrap}

/* 下拉：原生 select，只换外观 */
.control.select select{padding-right:34px; cursor:pointer}
.control.select select.is-empty{color:#9A9DB0}
.control.select select option{color:var(--ink)}
.control.select .chev{position:absolute; right:10px; top:15px; width:18px; height:18px; color:var(--ink-3); pointer-events:none; transition:transform .2s var(--ease-out)}
.control.select:focus-within .chev{color:var(--cobalt)}
.control.select select:disabled{cursor:default}
.field[data-field="region"].is-err .control{background:var(--tomato-tint)}
.field[data-field="region"] .mark{display:none}

/* 开关 */
.switch{margin-left:auto; display:inline-flex; align-items:center; gap:8px; cursor:pointer; font-size:13px; color:var(--ink-2); user-select:none}
.switch input{position:absolute; opacity:0; width:0; height:0}
.switch__track{position:relative; width:34px; height:20px; border-radius:999px; background:#CDD0DB; transition:background .2s}
.switch__track i{position:absolute; left:2px; top:2px; width:16px; height:16px; border-radius:50%; background:#fff; box-shadow:0 1px 2px rgba(20,23,45,.25); transition:transform .28s var(--ease-spring)}
.switch input:checked + .switch__track{background:var(--cobalt)}
.switch input:checked + .switch__track i{transform:translateX(14px)}
.switch input:focus-visible + .switch__track{outline:2px solid var(--cobalt); outline-offset:2px}
.switch:hover .switch__text{color:var(--ink)}

/* 支付方式 */
.methods{display:grid; grid-template-columns:repeat(3,1fr); gap:10px}
.method{position:relative; display:block; cursor:pointer}
.method input{position:absolute; opacity:0; inset:0; margin:0}
.method__box{display:flex; align-items:center; justify-content:center; gap:8px; height:46px; border-radius:12px; background:var(--white);
  box-shadow:inset 0 0 0 1px var(--line); font-weight:600; font-size:15px; color:var(--ink-2); transition:box-shadow .16s, background .16s, color .16s, transform .12s}
.method__box svg{width:20px; height:20px}
.method:hover .method__box{box-shadow:inset 0 0 0 1px var(--line-2); color:var(--ink)}
.method:active .method__box{transform:scale(.985)}
.method input:checked + .method__box{background:var(--cobalt-tint); box-shadow:inset 0 0 0 1.5px var(--cobalt); color:var(--cobalt)}
.method input:focus-visible + .method__box{box-shadow:inset 0 0 0 1.5px var(--cobalt), 0 0 0 4px var(--ring)}
.paybody{margin-top:12px; min-height:92px}
.paybody[hidden]{display:none}
.scanline{display:flex; align-items:center; gap:10px; height:48px; padding:0 14px; border-radius:12px; background:var(--paper-2); color:var(--ink-2); font-size:14px}
.scanline svg{width:20px; height:20px; flex:none; color:var(--cobalt)}

/* ---------- 提交 ---------- */
.cta{margin-top:auto; padding-bottom:30px}
.pay{position:relative; width:100%; height:56px; border:0; border-radius:16px; background:var(--cobalt); color:#fff;
  display:flex; align-items:center; justify-content:space-between; padding:0 22px; font-size:17px; font-weight:600; letter-spacing:.02em; overflow:hidden;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.2), 0 10px 20px -10px rgba(35,65,228,.7), 0 2px 4px rgba(20,23,45,.14);
  transition:transform .14s var(--ease-out), background .16s, box-shadow .2s}
.pay:hover{background:#2B49EC; transform:translateY(-1px); box-shadow:inset 0 1px 0 rgba(255,255,255,.22), 0 14px 24px -10px rgba(35,65,228,.75), 0 2px 4px rgba(20,23,45,.14)}
.pay:active{background:var(--cobalt-d); transform:translateY(1px) scale(.986,.95)}
.pay:focus-visible{outline:0; box-shadow:0 0 0 3px var(--paper), 0 0 0 5px var(--cobalt)}
.pay__left{display:inline-flex; align-items:center; gap:10px}
.pay__amt{font-weight:800; font-size:21px; letter-spacing:-.015em; font-variant-numeric:tabular-nums; letter-spacing:-.01em}
.pay__spin{display:none; width:18px; height:18px; border-radius:50%; border:2.2px solid rgba(255,255,255,.3); border-top-color:#fff; animation:spin .8s linear infinite}
.pay.is-busy{pointer-events:none; background:var(--cobalt)}
.pay.is-busy .pay__spin{display:block}
@keyframes spin{to{transform:rotate(360deg)}}

.cta__note,.cta__errs{margin-top:12px; font-size:13px; line-height:20px; text-align:center}
.cta__note{color:var(--ink-3)}
.cta__errs{color:var(--tomato-t); display:flex; flex-wrap:wrap; justify-content:center; align-items:center; gap:0 6px}
.cta__errs[hidden],.cta__note[hidden]{display:none}
.cta__errs b{font-weight:700}
.cta__errs button{border:0; background:none; padding:0 1px; color:inherit; font-weight:600; text-decoration:underline; text-decoration-thickness:1px; text-underline-offset:3px; border-radius:4px}
.cta__errs button:hover{text-decoration-thickness:2px}
.cta__errs button:focus-visible{outline:2px solid var(--tomato); outline-offset:2px}

/* ---------- 演示切换（悬停才出现） ---------- */
.demo{position:absolute; left:50%; bottom:14px; transform:translateX(-50%); display:flex; gap:2px; padding:3px; border-radius:999px;
  background:rgba(255,255,255,.62); box-shadow:0 0 0 1px rgba(20,23,45,.06); opacity:0; pointer-events:none; transition:opacity .25s; z-index:9}
.canvas:hover .demo{opacity:1; pointer-events:auto}
.demo button{border:0; background:none; border-radius:999px; padding:5px 12px; font-size:12px; color:var(--ink-2)}
.demo button:hover{background:rgba(20,23,45,.07); color:var(--ink)}
.demo button[aria-pressed="true"]{background:var(--ink); color:#fff}