:root {
    --page-bg: #f0f8ff;
    --primary: #4682b4;
    --secondary: #6699cc;
    --info-bg: #CDD1CD;
    --surface: #ffffff;
    --text: #202b36;
    --muted: #5c6874;
    --border: #dddddd;
    --green: #2b9d67;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-width: 0;
    color: var(--text);
    background-color: var(--page-bg);
    font-family: Arial, sans-serif;
    font-size: 14px;
    line-height: 1.65;
}

a {
    color: #000000;
    text-decoration: none;
}

a:hover {
    color: #ff0000;
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(70, 130, 180, 0.3);
    outline-offset: 2px;
}

.payment-header {
    padding: 12px 20px;
    color: #ffffff;
    background-color: var(--primary);
    text-align: center;
}

.header-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(1100px, 100%);
    min-height: 88px;
    margin: 0 auto;
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
}

.brand img {
    width: 72px;
    height: 72px;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.65);
    border-radius: 5px;
}

.brand strong,
.brand span {
    display: block;
    text-align: left;
}

.brand strong {
    font-size: 25px;
    line-height: 1.3;
}

.brand span {
    margin-top: 3px;
    color: #eef6fc;
    font-size: 13px;
}

.floating-back {
    position: fixed;
    right: 16px;
    bottom: 240px;
    z-index: 903;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-height: 44px;
    padding: 9px 16px;
    color: #2F5FB3;
    background: #F4F8FF;
    border: 1px solid #C9D8F0;
    border-radius: 999px;
    box-shadow: 0 4px 14px -6px rgba(27, 42, 74, 0.25);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
}

.floating-back:hover {
    color: #1F4E9B;
    background: #EAF2FF;
    border-color: #8EADD9;
}


.payment-main {
    width: min(1100px, 92%);
    margin: 20px auto 34px;
}

.account-bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 10px;
    padding: 9px 12px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 5px;
}

.account-bar span { margin-right: auto; color: var(--muted); }
.account-bar a { color: var(--primary); font-weight: bold; }
.force-warning, .empty-state { margin: 10px 0; padding: 13px 15px; border: 1px solid #e4c56b; border-radius: 5px; background: #fff8dc; }
.empty-state { border-color: var(--border); background: #ffffff; text-align: center; }
.empty-state h2 { margin: 0 0 5px; color: var(--primary); }

.hero {
    padding: 24px 20px;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 5px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.eyebrow {
    display: inline-block;
    margin: 0 0 6px;
    padding: 4px 10px;
    color: #ffffff;
    background-color: var(--secondary);
    border-radius: 5px;
    font-size: 12px;
}

.hero h1 {
    margin: 0;
    color: var(--primary);
    font-size: 30px;
    line-height: 1.3;
}

.hero-intro {
    max-width: 680px;
    margin: 9px auto 0;
    color: var(--muted);
}

.price-panel {
    margin-top: 20px;
    padding: 20px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.price-panel h2 { margin: 2px 0; color: var(--primary); font-size: 24px; }
.price-panel > p { margin: 4px 0; color: var(--muted); }
.price-resource { color: var(--secondary) !important; font-size: 12px; font-weight: bold; }
/* 资源一句话卖点：资源名下方的胶囊高亮条，配色与 price-intro 卡片同源 */
.resource-tagline { display: inline-block; margin: 10px 0 4px; padding: 9px 22px; border: 1px solid #c9d8f0; border-radius: 999px; background: linear-gradient(135deg, #f4f8ff, #e8f2ff); color: #2F5FB3; font-size: 16px; font-weight: 600; line-height: 1.6; letter-spacing: .2px; box-shadow: 0 2px 6px -4px rgba(47, 95, 179, .35); }
.price-values { display: flex; justify-content: center; gap: 12px; margin-top: 16px; }
.official-price, .discount-price, .price-login { flex: 1; max-width: 360px; padding: 14px; border: 1px solid #dce4eb; border-radius: 5px; background: #f8fbfe; }
.discount-price { border-color: #bddfcf; background: #eef9f3; }
.price-login { border-color: #e4c56b; background: #fff8dc; }
.official-price span, .discount-price span, .price-login span { display: block; color: var(--muted); }
.official-price strong, .discount-price strong, .price-login strong { display: block; margin-top: 4px; color: var(--primary); font-size: 22px; }
.discount-price strong { color: #168052; }
.price-login a { display: inline-block; margin-top: 5px; color: var(--primary); font-weight: bold; }

/* 资源介绍卡片：价格行第三列，链接到导航首页对应资源卡 */
.price-intro { display: block; flex: 1; max-width: 360px; padding: 14px; border: 1px solid #c9d8f0; border-radius: 5px; background: #f4f8ff; }
.price-intro span { display: block; color: var(--muted); }
.price-intro strong { display: block; margin-top: 4px; color: #2F5FB3; font-size: 22px; }
.price-intro em { display: block; margin-top: 6px; color: var(--muted); font-style: normal; font-size: 12px; }
.price-intro:hover { border-color: #2F5FB3; box-shadow: 0 2px 8px rgba(47, 95, 179, 0.18); }
.price-intro:hover strong { color: #1F4E9B; }

.resource-selector { margin-top: 20px; }
.selector-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.selector-card { display: flex; align-items: center; gap: 12px; min-width: 0; padding: 12px; background: #ffffff; border: 1px solid var(--border); border-radius: 5px; box-shadow: 0 2px 4px rgba(0,0,0,.06); }
.selector-card:hover { border-color: var(--primary); }
.selector-card img { width: 52px; height: 52px; flex: 0 0 52px; object-fit: contain; border-radius: 4px; }
.selector-card span { min-width: 0; flex: 1; }
.selector-card strong, .selector-card small { display: block; }
.selector-card small { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.selector-card em { color: #c00000; font-style: normal; font-weight: bold; text-align: right; }
.selector-card .card-prices { display: flex; flex-direction: column; gap: 3px; text-align: right; flex: 0 0 auto; }
.selector-card .card-prices i { font-style: normal; font-weight: bold; color: var(--primary); font-size: .92em; }
.selector-card .card-prices i.need-login { color: var(--muted); font-weight: normal; }

.reference-price {
    text-decoration: line-through;
    text-decoration-color: #ff0000;
}

.steps {
    display: flex;
    justify-content: center;
    gap: 10px;
    max-width: 760px;
    margin: 18px auto 0;
    padding: 0;
    list-style: none;
    counter-reset: payment-step;
}

.steps li {
    flex: 1;
    counter-increment: payment-step;
    padding: 9px 10px;
    background-color: var(--info-bg);
    border-radius: 5px;
    font-weight: bold;
}

.steps li::before {
    content: counter(payment-step) ".";
    margin-right: 4px;
    color: var(--primary);
}

.section-heading {
    margin: 20px 0 10px;
    padding: 10px 14px;
    color: #ffffff;
    background-color: var(--secondary);
    border-radius: 5px;
}

.section-heading h2 {
    margin: 0;
    font-size: 18px;
}

.section-heading p {
    margin: 2px 0 0;
    color: #ffffff;
    font-size: 12px;
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.payment-card {
    overflow: hidden;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.payment-card-header {
    padding: 11px 13px;
    background-color: #f8fbfe;
    border-bottom: 1px solid #e3e8ec;
}

.payment-card-header h3 {
    margin: 0;
    color: var(--primary);
    font-size: 17px;
}

.payment-card-header p {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 12px;
}

.qr-link {
    display: block;
    margin: 10px;
    padding: 6px;
    background-color: #ffffff;
    border: 1px solid #e1e1e1;
    border-radius: 5px;
    text-align: center;
}

.qr-link:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 6px rgba(70, 130, 180, 0.2);
}

.qr-link img {
    display: block;
    width: 100%;
    height: 450px;
    object-fit: contain;
    border-radius: 3px;
}

.wechat-qr-wrap {
    display: flex;
    justify-content: center;
}

.wechat-add {
    width: min(100%, 430px);
}

.wechat-add .payment-card-header {
    border-top: 4px solid var(--green);
}

.notes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
}

.notice,
.contact-card {
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.notice {
    background-color: var(--info-bg);
}

.contact-card {
    background-color: var(--surface);
}

.notice h2,
.contact-card h2 {
    margin: 0 0 7px;
    color: var(--primary);
    font-size: 17px;
}

.notice p,
.contact-card p {
    margin: 5px 0;
}

.notice strong {
    color: #c00000;
}

.wechat-contact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    padding: 10px 12px;
    background-color: #eef7f1;
    border: 1px solid #d4e7da;
    border-radius: 5px;
}

.wechat-id {
    color: #167447;
    font-size: 18px;
    font-weight: bold;
}

.copy-button {
    padding: 8px 14px;
    color: #ffffff;
    background-color: var(--primary);
    border: 0;
    border-radius: 5px;
    font: inherit;
    font-weight: bold;
    cursor: pointer;
}

.copy-button:hover {
    background-color: #356b97;
}

.page-footer {
    padding: 16px 20px;
    color: #ffffff;
    background-color: var(--primary);
    text-align: center;
}

.page-footer p {
    margin: 0;
}

.page-footer a,
.page-footer a:visited {
    color: #ffffff;
}

.page-footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

@media (max-width: 900px) {
    .payment-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .payment-card:last-child {
        grid-column: 1 / -1;
        width: min(100%, 520px);
        justify-self: center;
    }
}

@media (max-width: 680px) {
    .payment-header {
        padding: 10px 12px;
    }

    .header-inner {
        justify-content: flex-start;
        min-height: 66px;
    }

    .brand {
        gap: 10px;
    }

    .brand img {
        width: 56px;
        height: 56px;
    }

    .brand strong {
        font-size: 19px;
    }

    .brand span {
        display: none;
    }

    .floating-back {
        right: max(12px, env(safe-area-inset-right));
        bottom: 240px;
        min-height: 42px;
        padding: 8px 14px;
        font-size: 13px;
    }

    .payment-main {
        width: calc(100% - 20px);
        margin-top: 10px;
    }

    .hero {
        padding: 18px 12px;
    }

    .hero h1 {
        font-size: 24px;
    }

    .steps {
        flex-direction: column;
        gap: 6px;
        text-align: left;
    }

    .payment-grid,
    .notes {
        grid-template-columns: 1fr;
    }

    .account-bar { align-items: flex-start; flex-wrap: wrap; }
    .account-bar span { flex-basis: 100%; }
    .price-values { flex-direction: column; }
    .official-price, .discount-price, .price-login, .price-intro { max-width: none; }
    .selector-grid { grid-template-columns: 1fr; }
    .selector-card { align-items: flex-start; }
    .selector-card em { flex: 0 0 110px; font-size: 12px; }

    .payment-card:last-child {
        grid-column: auto;
        width: 100%;
    }

    .qr-link img {
        height: auto;
        max-height: none;
    }

    .wechat-contact {
        align-items: stretch;
        flex-direction: column;
    }

    .copy-button {
        min-height: 40px;
    }
}

@media (max-width: 420px) {
    .floating-back {
        bottom: 196px;
    }
}

/* 免费资源直达入口 */
.free-entry { display: inline-block; padding: 11px 26px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: bold; text-decoration: none; }
.free-entry:hover { opacity: .9; }
.selector-card .card-prices i.free-tag { color: #1a9e54; font-weight: bold; font-style: normal; font-size: .92em; }


/* 购买有效期标签 */
.vtag { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 999px; background: #EEF4FF; color: #2F5FB3; font-size: 10px; font-style: normal; font-weight: 600; vertical-align: middle; }
.validity-line { margin: 10px 0 0; font-size: .95em; color: #444; }

/* 子产品方案选择器（2026-10-02）：主产品下的模块/词库/时长方案，价格随所选方案切换 */
.sku-section { margin-top: 16px; text-align: left; }
.sku-heading { margin: 0 0 8px; font-weight: bold; color: #333; }
.sku-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.sku-card { position: relative; display: flex; flex-direction: column; gap: 2px; min-width: 150px; max-width: 240px; flex: 1 1 160px;
    padding: 10px 14px; background: #fff; border: 2px solid var(--border); border-radius: 8px; cursor: pointer; }
.sku-card:hover { border-color: var(--secondary); }
.sku-card.sku-active { border-color: var(--primary); background: #F3F9FF; box-shadow: 0 2px 6px rgba(70,130,180,.18); }
.sku-card input { position: absolute; opacity: 0; pointer-events: none; }
.sku-card strong { font-size: .98em; color: var(--text); }
.sku-card small { color: var(--muted); font-size: .85em; line-height: 1.4; }
.sku-card .sku-vtag { margin-left: 0; margin-top: 2px; align-self: flex-start; }
.sku-count-tag { background: #FFF6E5; color: #A65C00; }
.selector-card .sku-count-tag { margin-left: 6px; }
@media (max-width: 480px) {
    .sku-card { min-width: 130px; }
}