:root {
    --brand-red: #e6012d;
    --brand-orange: #ff7a18;
    --brand-yellow: #ffd93b;
    --primary-text: #1f1f1f;
    --secondary-text: #616161;
    --border-color: #e4e4e4;
    --card-radius: 18px;
    --card-shadow: 0 24px 60px rgba(31, 41, 55, 0.08);
    --transition-fast: 0.2s ease;
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

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

body {
    margin: 0;
    background: #f4f5f7;
    color: var(--primary-text);
}

img {
    max-width: 100%;
    display: block;
}

.site-header {
    background: #fff;
    padding: 18px 5vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo-stack {
    display: flex;
    flex-direction: column;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: #222;
    line-height: 1.1;
}

.logo-stack span:last-child {
    font-size: 0.7rem;
    color: var(--secondary-text);
    letter-spacing: 0.3em;
}

.site-header nav {
    display: flex;
    gap: 24px;
    font-size: 0.95rem;
    color: var(--secondary-text);
}

.site-header nav a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-header nav a:hover {
    color: var(--brand-red);
}

.btn {
    border: none;
    border-radius: 999px;
    padding: 10px 28px;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary {
    background: var(--brand-red);
    color: #fff;
    box-shadow: 0 12px 24px rgba(230, 1, 45, 0.35);
}

.btn--ghost {
    background: transparent;
    color: var(--brand-red);
    border: 1px solid var(--brand-red);
}

.btn:active {
    transform: scale(0.98);
}

.hero {
    min-height: 300px;
    background: url('./img/测试BANNER.png') center/cover no-repeat;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 24px 5vw 0;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 9, 13, 0.05) 0%, rgba(8, 9, 13, 0.85) 100%);
}

.hero-panel {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: -60px;
    background: rgba(125, 205, 255, 1);
    padding: 16px 28px;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
}

.hero-panel img {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    object-fit: cover;
    border: 3px solid #fff;
}

.hero-panel h1 {
    margin: 0;
    font-size: 1.4rem;
}

.hero-panel p {
    margin: 4px 0 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
    padding: 120px 5vw 60px;
}

.card {
    background: #fff;
    border-radius: var(--card-radius);
    padding: 28px;
    box-shadow: var(--card-shadow);
    margin-bottom: 28px;
}

.card h2 {
    margin-top: 0;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-marker {
    width: 4px;
    height: 18px;
    background: var(--brand-red);
    border-radius: 999px;
}

.login-panel {
    text-align: center;
    padding: 48px 24px;
}

.login-panel p {
    margin: 0 0 18px;
    color: var(--secondary-text);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 20px;
}

.product-card {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.product-card:hover {
    border-color: transparent;
    transform: translateY(-6px);
    box-shadow: 0 20px 35px rgba(0, 0, 0, 0.08);
}

.product-card img {
    width: 68px;
    height: 68px;
    margin: 0 auto 12px;
}

.product-card h3 {
    margin: 0;
    font-size: 1rem;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.product-card p {
    margin: 6px 0 0;
    color: var(--brand-red);
    font-weight: 600;
}

.product-card .buy-btn {
    width: 100%;
    margin-top: 16px;
    border-radius: 12px;
    background: var(--brand-red);
    color: #fff;
    padding: 10px 0;
    border: none;
    font-size: 0.95rem;
}

.product-card .buy-btn:disabled {
    background: #cbd5f5;
    cursor: not-allowed;
    color: #fff;
}

.qr-panel {
    position: sticky;
    top: 100px;
    align-self: start;
    background: linear-gradient(180deg, var(--brand-orange), var(--brand-red));
    color: #fff;
    border-radius: var(--card-radius);
    padding: 26px 22px;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.qr-panel h3 {
    margin: 0 0 14px;
    letter-spacing: 0.2em;
}

.qr-panel img {
    width: 168px;
    height: 168px;
    margin: 0 auto 14px;
    border-radius: 12px;
    background: #fff;
    padding: 10px;
}

.download-btn {
    width: 100%;
    margin-top: 12px;
    border-radius: 12px;
    border: none;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    padding: 12px;
    font-size: 0.95rem;
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-fast);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.footer-note {
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.85rem;
    margin-top: 32px;
}

.login-panel__status {
    margin-bottom: 18px;
    color: var(--secondary-text);
    white-space: pre-line;
}

.login-modal[hidden],
.purchase-modal[hidden] {
    display: none;
}

.login-modal,
.purchase-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.login-modal__backdrop,
.purchase-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(2px);
}

.login-modal__dialog,
.purchase-modal__dialog {
    position: relative;
    background: #fff;
    border-radius: 24px;
    padding: 32px;
    width: min(420px, 90vw);
    box-shadow: 0 40px 80px rgba(15, 23, 42, 0.25);
    z-index: 1;
}

.login-modal__close,
.purchase-modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-text);
}

.login-modal__hint,
.purchase-modal__hint {
    margin-top: 0;
    color: var(--secondary-text);
}

.login-form__field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--primary-text);
}

.login-form__field input {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-form__field input:focus {
    border-color: var(--brand-red);
    box-shadow: 0 0 0 3px rgba(230, 1, 45, 0.15);
}

.login-modal__status,
.purchase-modal__status {
    min-height: 20px;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.login-modal__status[data-state="error"],
.purchase-modal__status[data-state="error"] {
    color: var(--brand-red);
}

.login-modal__status[data-state="success"],
.purchase-modal__status[data-state="success"] {
    color: #16a34a;
}

.login-modal__status[data-state="info"],
.purchase-modal__status[data-state="info"] {
    color: var(--secondary-text);
}

.login-modal__actions,
.purchase-modal__actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.channel-list {
    display: grid;
    gap: 12px;
    margin: 18px 0 14px;
}

.channel-option {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 12px 16px;
    background: #fff;
    width: 100%;
    display: block;
    text-align: left;
    font-size: 0.95rem;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}

.channel-option--active {
    border-color: var(--brand-red);
    box-shadow: 0 10px 25px rgba(230, 1, 45, 0.15);
    color: var(--brand-red);
}

.channel-option__name {
    font-weight: 600;
}

.channel-option__desc {
    display: block;
    color: var(--secondary-text);
    font-size: 0.85rem;
    margin-top: 2px;
}

@media (max-width: 1024px) {
    .site-header {
        flex-direction: column;
        gap: 12px;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        flex-direction: column;
        text-align: center;
    }

    .qr-panel {
        position: static;
        margin-top: 12px;
    }
}

@media (max-width: 640px) {
    .site-header nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        min-height: 220px;
        padding: 18px 4vw;
    }

    .layout {
        padding: 100px 4vw 40px;
    }

    .card {
        padding: 22px;
    }
}