/* ========== Reset & Base ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #ff6b35;
    --color-primary-dark: #e55a2b;
    --color-alipay: #1677ff;
    --color-alipay-dark: #0958d9;
    --color-wechat: #07c160;
    --color-wechat-dark: #06ad56;
    --color-taobao: #ff6b35;
    --color-bg: #f8f7f4;
    --color-card: #ffffff;
    --color-text: #2c2c2c;
    --color-text-secondary: #666666;
    --color-text-light: #999999;
    --color-border: #e8e5df;
    --color-success: #07c160;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --radius-sm: 10px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

/* ========== Header ========== */
.header {
    text-align: center;
    padding: 28px 0 8px;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.header .subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ========== Card ========== */
.card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

/* ========== Notice Card ========== */
.notice-card {
    margin-bottom: 20px;
}

.notice-card .card p {
    margin-bottom: 12px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.notice-card .card p:last-child {
    margin-bottom: 0;
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 16px 0;
    padding: 16px;
    background: #fafaf8;
    border-radius: var(--radius-sm);
    flex-wrap: wrap;
}

.step {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-text);
    font-weight: 500;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step small {
    color: var(--color-text-light);
    font-weight: 400;
}

.step-arrow {
    color: var(--color-primary);
    font-size: 1.2rem;
    font-weight: 700;
}

.note {
    color: var(--color-text-secondary);
    font-style: italic;
}

.warning {
    background: #fff8e6;
    border-left: 4px solid #faad14;
    padding: 10px 14px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: #8c6d1f !important;
    font-size: 0.9rem;
}

.important-notes {
    background: #f0f7ff;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin: 12px 0;
}

.important-notes p {
    margin-bottom: 6px !important;
}

.example {
    color: var(--color-text-light) !important;
    font-size: 0.85rem !important;
    padding-left: 16px;
}

.tip {
    color: var(--color-text-light) !important;
    font-size: 0.88rem !important;
}

/* ========== Action Buttons ========== */
.action-buttons {
    margin-bottom: 20px;
}

.action-buttons h2 {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pay-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    text-align: left;
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
}

.pay-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pay-btn:active {
    transform: translateY(0);
}

.pay-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.alipay-btn {
    border-color: #d6e4ff;
    color: var(--color-alipay);
}

.alipay-btn:hover {
    background: #f0f5ff;
    border-color: var(--color-alipay);
}

.wechat-btn {
    border-color: #b7ebce;
    color: var(--color-wechat);
}

.wechat-btn:hover {
    background: #f0faf5;
    border-color: var(--color-wechat);
}

.taobao-btn {
    border-color: #ffd4c0;
    color: var(--color-taobao);
}

.taobao-btn:hover {
    background: #fff6f0;
    border-color: var(--color-taobao);
}

/* ========== Payment Detail ========== */
.payment-detail {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

.payment-detail.hidden {
    display: none;
}

.payment-card {
    text-align: center;
}

.payment-card h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.account-info {
    margin-bottom: 16px;
    font-size: 1rem;
}

.account-info strong {
    color: var(--color-alipay);
    font-size: 1.1rem;
}

.copy-account-btn {
    display: inline-block;
    padding: 2px 10px;
    margin-left: 6px;
    background: #f0f5ff;
    color: var(--color-alipay);
    border: 1px solid #d6e4ff;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    vertical-align: middle;
}

.copy-account-btn:hover {
    background: #e6f0ff;
    border-color: var(--color-alipay);
}

.copy-account-btn.copied {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.verify-note {
    margin-top: 4px;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.qr-code-wrapper {
    margin: 0 auto 12px;
    max-width: 280px;
}

.qr-code {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.scan-tip {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.next-btn {
    display: inline-block;
    padding: 14px 36px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
}

.next-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* ========== Shop Section ========== */
.shop-section {
    margin-bottom: 20px;
}

.shop-card h2 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.shop-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.link-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.link-btn {
    flex: 1;
    min-width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s ease;
    border: 2px solid transparent;
    font-family: inherit;
}

.link-btn:hover {
    transform: translateY(-2px);
}

.link-icon {
    font-size: 1rem;
}

.pc-btn {
    background: #f0f5ff;
    color: var(--color-alipay);
    border-color: #d6e4ff;
}

.pc-btn:hover {
    background: #e6f0ff;
    border-color: var(--color-alipay);
}

.mobile-btn {
    background: #f0faf5;
    color: var(--color-wechat);
    border-color: #b7ebce;
}

.mobile-btn:hover {
    background: #e6f7ee;
    border-color: var(--color-wechat);
}

.copy-btn {
    background: #fff6f0;
    color: var(--color-taobao);
    border-color: #ffd4c0;
}

.copy-btn:hover {
    background: #ffede5;
    border-color: var(--color-taobao);
}

.copy-mobile-btn {
    background: #f5f0ff;
    color: #7c3aed;
    border-color: #ddd6fe;
}

.copy-mobile-btn:hover {
    background: #ede5ff;
    border-color: #7c3aed;
}

.copy-success {
    margin-top: 12px;
    padding: 10px 16px;
    background: #f0faf5;
    border-radius: var(--radius-sm);
    color: var(--color-success);
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
    animation: fadeIn 0.3s ease;
}

.copy-success.hidden {
    display: none;
}

.hidden-taokouling {
    position: absolute;
    left: -9999px;
    opacity: 0;
    pointer-events: none;
}

/* ========== Back Button ========== */
.back-wrapper {
    text-align: center;
    margin-bottom: 16px;
}

.back-btn {
    display: inline-block;
    padding: 10px 24px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 50px;
    transition: all 0.2s ease;
}

.back-btn:hover {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.04);
}

/* ========== Footer ========== */
.footer {
    text-align: center;
    padding: 16px 0;
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== Responsive ========== */
@media (max-width: 480px) {
    .container {
        padding: 16px 12px 32px;
    }

    .header {
        padding: 16px 0 4px;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .card {
        padding: 18px;
    }

    .flow-steps {
        flex-direction: column;
        gap: 4px;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .pay-btn {
        padding: 14px 18px;
        font-size: 0.95rem;
    }

    .link-buttons {
        flex-direction: column;
    }

    .link-btn {
        min-width: auto;
    }
}