:root {
    color-scheme: light;
    --bg: #f4f6fb;
    --panel: rgba(255, 255, 255, 0.94);
    --panel-strong: #ffffff;
    --text: #151922;
    --muted: #5c6679;
    --line: rgba(102, 119, 153, 0.18);
    --line-strong: rgba(13, 63, 140, 0.16);
    --brand: #0f67d4;
    --brand-deep: #0a4ea7;
    --brand-soft: rgba(15, 103, 212, 0.08);
    --danger: #c24141;
    --shadow: 0 28px 64px rgba(22, 33, 61, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --max-width: 1120px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(15, 103, 212, 0.10), transparent 28%),
        radial-gradient(circle at right 20%, rgba(10, 78, 167, 0.08), transparent 24%),
        linear-gradient(180deg, #f7f9fd 0%, #eef2f8 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

.checkout-shell {
    width: min(calc(100% - 32px), var(--max-width));
    margin: 0 auto;
    padding: 48px 0 72px;
}

.checkout-hero {
    margin-bottom: 28px;
}

.hero-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 18px;
}

.hero-kicker {
    margin: 0 0 10px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--brand);
}

.hero-title {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.4rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.05em;
}

.hero-copy {
    margin: 14px 0 0;
    max-width: 700px;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--muted);
}

.checkout-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 24px;
}

.checkout-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.package-panel,
.form-panel {
    padding: 28px;
}

.package-state {
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed var(--line);
    border-radius: var(--radius-lg);
    color: var(--muted);
    text-align: center;
    padding: 20px;
}

.package-header {
    margin-bottom: 24px;
}

.package-category {
    margin: 0 0 8px;
    color: var(--brand);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.package-title {
    margin: 0;
    font-size: clamp(1.6rem, 3vw, 2.3rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.package-subtitle {
    margin: 10px 0 0;
    color: var(--muted);
    line-height: 1.6;
}

.price-stack {
    margin: 0;
    padding: 20px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.price-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
}

.price-row dt {
    color: var(--muted);
    font-size: 0.95rem;
}

.price-row dd {
    margin: 0;
    text-align: right;
    font-size: 1rem;
    font-weight: 600;
}

.price-row-strong dd {
    font-size: 1.5rem;
    color: var(--brand-deep);
    letter-spacing: -0.04em;
}

.checkout-note {
    margin: 18px 0 0;
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    background: var(--brand-soft);
    color: #123c76;
    line-height: 1.7;
}

.highlight-list {
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 12px;
}

.highlight-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--muted);
    line-height: 1.6;
}

.highlight-list li::before {
    content: "";
    width: 10px;
    height: 10px;
    margin-top: 8px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--brand) 0%, #73a9ff 100%);
    flex: 0 0 10px;
}

.checkout-form {
    display: grid;
    gap: 20px;
}

.field-block {
    display: grid;
    gap: 10px;
}

.field-label {
    font-size: 0.92rem;
    font-weight: 700;
}

.field-input {
    width: 100%;
    min-height: 54px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--panel-strong);
    padding: 0 16px;
    font: inherit;
    color: var(--text);
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.field-input:focus {
    outline: none;
    border-color: rgba(15, 103, 212, 0.5);
    box-shadow: 0 0 0 4px rgba(15, 103, 212, 0.12);
    transform: translateY(-1px);
}

.field-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.6;
}

.form-error {
    border-radius: var(--radius-md);
    padding: 14px 16px;
    background: rgba(194, 65, 65, 0.08);
    color: var(--danger);
    line-height: 1.6;
}

.submit-button {
    border: none;
    border-radius: 999px;
    min-height: 56px;
    padding: 0 24px;
    font: inherit;
    font-weight: 700;
    font-size: 1rem;
    color: #ffffff;
    background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 100%);
    cursor: pointer;
    box-shadow: 0 18px 36px rgba(15, 103, 212, 0.24);
    transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 22px 40px rgba(15, 103, 212, 0.28);
}

.submit-button:disabled {
    cursor: wait;
    opacity: 0.7;
}

.submit-note {
    margin: -4px 0 0;
    color: var(--muted);
    line-height: 1.7;
    font-size: 0.92rem;
}

.checkout-shell-result {
    display: flex;
    align-items: center;
    min-height: 100vh;
    padding-top: 32px;
    padding-bottom: 32px;
}

.result-panel {
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
    padding: 36px;
}

.result-summary {
    margin-top: 28px;
    padding: 20px 22px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.72);
    display: grid;
    gap: 12px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: var(--muted);
}

.result-row strong {
    color: var(--text);
    text-align: right;
}

.result-empty {
    margin-top: 28px;
    padding: 18px 20px;
    border-radius: var(--radius-lg);
    background: rgba(92, 102, 121, 0.08);
    color: var(--muted);
    line-height: 1.7;
}

.result-actions {
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 999px;
    border: 1px solid var(--line);
    color: var(--text);
    background: rgba(255, 255, 255, 0.82);
    font-weight: 600;
}

.link-button-primary {
    background: var(--text);
    color: #ffffff;
    border-color: var(--text);
}

.mono-text {
    font-family: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
}

.payment-order-shell {
    display: grid;
    gap: 24px;
}

.payment-order-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
    align-items: stretch;
}

.payment-status-card {
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    background: var(--panel);
    box-shadow: var(--shadow);
    padding: 24px;
    display: grid;
    align-content: center;
    gap: 8px;
}

.payment-status-card strong {
    font-size: 2rem;
    color: var(--brand-deep);
    line-height: 1.1;
}

.payment-status-card small {
    color: var(--muted);
    overflow-wrap: anywhere;
}

.payment-status-badge {
    width: max-content;
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0 12px;
    background: rgba(92, 102, 121, 0.10);
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
}

.payment-status-badge.is-paying {
    background: rgba(15, 103, 212, 0.10);
    color: var(--brand-deep);
}

.payment-status-badge.is-paid {
    background: rgba(22, 163, 74, 0.10);
    color: #15803d;
}

.payment-status-badge.is-failed,
.payment-status-badge.is-closed {
    background: rgba(194, 65, 65, 0.10);
    color: var(--danger);
}

.payment-order-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 24px;
    align-items: start;
}

.payment-action-panel,
.payment-detail-panel,
.payment-error-panel {
    padding: 28px;
}

.payment-error-panel {
    max-width: 720px;
}

.payment-error-panel h2 {
    margin: 0 0 10px;
}

.payment-error-panel p {
    color: var(--muted);
    line-height: 1.7;
}

.payment-action-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
}

.payment-subject {
    margin: 0;
    font-size: 1.65rem;
    line-height: 1.25;
    overflow-wrap: anywhere;
}

.payment-action-body {
    padding-top: 24px;
}

.payment-qr-box {
    display: grid;
    justify-items: center;
    gap: 18px;
}

.payment-qr-image {
    width: min(320px, 100%);
    aspect-ratio: 1;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #ffffff;
    padding: 14px;
}

.payment-qr-box p,
.payment-direct-box p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
    text-align: center;
}

.payment-direct-box {
    min-height: 320px;
    display: grid;
    justify-items: center;
    align-content: center;
    gap: 18px;
    text-align: center;
}

.payment-direct-box h3 {
    margin: 0;
    font-size: 1.4rem;
}

.payment-form-host {
    width: 0;
    height: 0;
    overflow: hidden;
}

.payment-detail-panel {
    position: sticky;
    top: 24px;
}

.payment-detail-panel h2 {
    margin: 0 0 18px;
    font-size: 1.1rem;
}

.payment-detail-list {
    margin: 0;
    display: grid;
    gap: 12px;
}

.payment-detail-list div {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.payment-detail-list dt {
    color: var(--muted);
    font-size: 0.9rem;
}

.payment-detail-list dd {
    margin: 0;
    min-width: 0;
    font-weight: 700;
    text-align: right;
    overflow-wrap: anywhere;
}

.payment-safety-note {
    margin-top: 20px;
    border-radius: var(--radius-lg);
    background: rgba(92, 102, 121, 0.08);
    color: var(--muted);
    line-height: 1.7;
    padding: 16px;
    font-size: 0.92rem;
}

@media (max-width: 900px) {
    .checkout-layout {
        grid-template-columns: 1fr;
    }

    .payment-order-hero,
    .payment-order-layout {
        grid-template-columns: 1fr;
    }

    .payment-detail-panel {
        position: static;
    }

    .checkout-shell {
        width: min(calc(100% - 24px), var(--max-width));
        padding-top: 24px;
        padding-bottom: 48px;
    }

    .package-panel,
    .form-panel,
    .result-panel,
    .payment-action-panel,
    .payment-detail-panel,
    .payment-error-panel {
        padding: 22px;
    }

    .payment-action-head {
        display: grid;
    }

    .payment-detail-list div {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .payment-detail-list dd {
        text-align: left;
    }
}