:root { color-scheme: light; font-family: Inter, "Microsoft YaHei", system-ui, sans-serif; color: #172033; background: #f4f6fb; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 80% 0%, #dbeafe 0, transparent 38%), #f4f6fb; }
.shell { width: min(820px, calc(100% - 32px)); margin: 0 auto; padding: 72px 0; }
.hero { margin-bottom: 28px; }
.eyebrow { display: inline-block; padding: 7px 11px; border-radius: 999px; color: #3158d4; background: #e8edff; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
h1 { margin: 16px 0 10px; font-size: clamp(34px, 6vw, 56px); letter-spacing: -.04em; }
.hero p { margin: 0; color: #65708a; font-size: 17px; }
.panel { background: rgba(255,255,255,.94); border: 1px solid #e5e9f3; border-radius: 24px; padding: 28px; box-shadow: 0 24px 60px rgba(48,65,105,.12); }
.hidden { display: none; }
.package-line, .account-head { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 28px; }
.package-line strong, .account-head h2 { display: block; margin: 5px 0 0; font-size: 21px; }
.label { color: #778198; font-size: 13px; }
.badge { color: #267353; background: #e3f7ed; border-radius: 999px; padding: 7px 11px; font-size: 13px; }
label { display: block; margin-bottom: 9px; font-weight: 700; }
.input-row { display: flex; gap: 10px; }
input { min-width: 0; flex: 1; border: 1px solid #d7ddea; border-radius: 13px; padding: 14px 15px; font-size: 16px; outline: none; text-transform: uppercase; }
input:focus { border-color: #496dec; box-shadow: 0 0 0 4px #496dec18; }
button { border: 0; border-radius: 13px; padding: 0 22px; background: #3158d4; color: white; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
.ghost { height: 40px; color: #3158d4; background: #edf1ff; }
.message { min-height: 20px; margin: 12px 0 0; color: #65708a; }
.message.error { color: #c43737; }
.balance { border-radius: 18px; padding: 22px; background: linear-gradient(135deg,#243c8f,#4168e9); color: white; }
.balance span { opacity: .85; }
.balance strong { display: block; margin: 4px 0 14px; font-size: 42px; }
.balance small { display: block; margin-top: 8px; opacity: .78; }
.progress { height: 7px; overflow: hidden; border-radius: 999px; background: #ffffff30; }
.progress i { display: block; height: 100%; width: 0; border-radius: inherit; background: #8df0c1; transition: width .35s ease; }
.fields { margin-top: 20px; border: 1px solid #e7eaf1; border-radius: 17px; overflow: hidden; }
.field { display: grid; grid-template-columns: 88px minmax(0,1fr) 58px; gap: 10px; align-items: center; padding: 15px; border-bottom: 1px solid #edf0f5; }
.field:last-child { border-bottom: 0; }
.field span { color: #727d93; font-size: 13px; }
.field code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.field button { padding: 7px 9px; color: #3158d4; background: #edf1ff; }
.tip { margin: 18px 0 0; color: #667188; line-height: 1.65; }
@media (max-width: 620px) { .shell { padding: 38px 0; } .panel { padding: 20px; border-radius: 18px; } .input-row { flex-direction: column; } .input-row button { min-height: 46px; } .package-line { align-items: flex-start; flex-direction: column; } .field { grid-template-columns: 72px minmax(0,1fr) 54px; } }