:root {
    --jd-red: #e4393c;
    --primary-text: #333;
    --secondary-text: #555;
    --light-text: #888;
    --border-color: #e0e0e0;
    --background-light: #f9f9f9;
    --background-white: #fff;
    --success-bg: #e9f7ef;
    --success-text: #28a745;
    --error-text: #e4393c;
    --error-bg: #fdecea;
    --info-bg: #e7f3fe;
    --info-text: #007bff;
    --hover-light-bg: #f5f5f5;
    --font-primary: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --border-radius: 4px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    background-color: var(--background-light);
    color: var(--primary-text);
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
}

a {
    color: #005ea7;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--jd-red);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

.site-header {
    background-color: var(--background-white);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 36px;
    margin-right: 12px;
}

.logo h1 {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--primary-text);
    margin: 0;
}

.main-navigation ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

.main-navigation li {
    margin-left: 30px;
}

.main-navigation a {
    color: var(--primary-text);
    font-size: 1em;
    padding: 10px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
    text-decoration: none;
}
.main-navigation a:hover,
.main-navigation a.active {
    color: var(--jd-red);
    border-bottom-color: var(--jd-red);
    text-decoration: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1.2em;
    line-height: 1;
    padding: 6px 10px;
    cursor: pointer;
    color: var(--secondary-text);
    transition: background-color 0.2s, color 0.2s;
}
.menu-toggle:hover {
    background-color: var(--hover-light-bg);
    color: var(--primary-text);
}

main {
    padding: 30px 0 40px 0;
}

.main-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.recharge-form-section {
    background-color: var(--background-white);
    padding: 25px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.recharge-form-section h2 {
    font-size: 1.5em;
    color: var(--primary-text);
    margin-top: 0;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 500;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-text);
    font-size: 0.95em;
}

.form-group input[type="tel"],
.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-sizing: border-box;
    font-size: 1em;
    color: var(--primary-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input::placeholder {
    color: var(--light-text);
    opacity: 0.8;
}

.form-group input:focus {
    border-color: var(--jd-red);
    outline: none;
    box-shadow: 0 0 0 3px rgba(228, 57, 60, 0.15);
}
.form-group input.input-error {
    border-color: var(--error-text);
}
.form-group input.input-error:focus {
     box-shadow: 0 0 0 3px rgba(228, 57, 60, 0.25);
}

.form-group small {
    display: block;
    margin-top: 6px;
    font-size: 0.85em;
    color: var(--light-text);
}
.error-message {
    color: var(--error-text);
    font-size: 0.85em;
    margin-top: 6px;
    display: block;
    font-weight: 500;
}

.card-type-selector {
    display: flex;
    gap: 15px;
}

.type-option {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--background-white);
    min-height: 40px;
}

.type-option:hover {
    background-color: var(--hover-light-bg);
    border-color: #ccc;
}

.type-option.selected {
    border-color: var(--jd-red);
    background-color: #fff5f5;
    box-shadow: 0 0 0 1px var(--jd-red);
}

.type-option span {
    font-weight: 500;
    color: var(--primary-text);
    font-size: 0.95em;
}

.type-selector-icon {
    width: 28px;
    height: auto;
    margin-bottom: 6px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.denomination-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    margin-top: 5px;
}
.denomination-selector.input-error {
     outline: 1px solid var(--error-text);
     border-radius: var(--border-radius);
     padding: 2px;
     margin: -2px;
}

.denomination-button {
    padding: 8px 5px;
    border: 1px solid var(--border-color);
    background-color: var(--background-white);
    color: var(--primary-text);
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: center;
    font-size: 0.95em;
    font-weight: 500;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

.denomination-button:hover {
    border-color: #adadad;
    background-color: var(--hover-light-bg);
}

.denomination-button.selected {
    background-color: var(--jd-red);
    color: var(--background-white);
    border-color: var(--jd-red);
    font-weight: 600;
    box-shadow: 0 0 0 1px var(--jd-red);
}
.denomination-button.selected:hover {
     background-color: #c9302c;
     border-color: #c9302c;
}

.submit-group {
    margin-top: 25px;
}
.button-primary {
    background-color: var(--jd-red);
    color: var(--background-white);
    padding: 11px 25px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.05em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.button-icon {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    vertical-align: middle;
}

.button-primary:hover {
    background-color: #c9302c;
}
.button-primary:disabled {
    background-color: #fca9ab;
    cursor: not-allowed;
    opacity: 0.8;
}
.button-primary:disabled .button-icon {
     opacity: 0.7;
}

.message-area {
    margin-top: 18px;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    font-size: 0.9em;
}
.message-area.success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid #a5d6a7;
}
.message-area.error {
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid #f5c6cb;
}
.message-area.info {
    background-color: var(--info-bg);
    color: var(--info-text);
    border: 1px solid #b8daff;
}

.info-section {
    padding-top: 5px;
}

.info-section h2 {
    font-size: 1.5em;
    color: var(--primary-text);
    margin-top: 0;
    margin-bottom: 20px;
    font-weight: 500;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.info-block {
    background-color: var(--background-white);
    padding: 20px 25px;
    border-radius: var(--border-radius);
    margin-bottom: 18px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.info-block:last-child {
    margin-bottom: 0;
}

.info-block h3 {
    font-size: 1.15em;
    color: var(--primary-text);
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: 500;
}

.info-block ul {
    list-style: disc;
    padding-left: 20px;
    margin-top: 0;
    margin-bottom: 0;
}
.info-block ol {
    list-style: decimal;
    padding-left: 20px;
    margin-top: 0;
    margin-bottom: 0;
    counter-reset: none;
}

.info-block li {
    margin-bottom: 10px;
    padding-left: 0;
    position: static;
    color: var(--secondary-text);
    font-size: 0.95em;
}
.info-block li:last-child {
    margin-bottom: 0;
}
.info-block ul li .iconfont,
.info-block ol li::before {
    display: none;
}


.info-block p {
    margin-top: 0;
    margin-bottom: 12px;
    color: var(--secondary-text);
     font-size: 0.95em;
}
.info-block p:last-child {
    margin-bottom: 0;
}
.info-block p.warning-text::before {
    content: "⚠️";
    margin-right: 5px;
    color: #ff9800;
}
.info-block strong {
    font-weight: 600;
    color: var(--primary-text);
}

.card-types-explained {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
    margin: 15px 0;
    font-size: 0.95em;
    background-color: #fdfdfd;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.card-types-explained div {
    color: var(--secondary-text);
}
.card-types-explained strong {
    color: var(--primary-text);
    font-weight: 500;
    margin-right: 5px;
}

.site-footer {
    background-color: #f5f5f5;
    color: var(--secondary-text);
    padding: 25px 0;
    margin-top: 30px;
    text-align: center;
    font-size: 0.85em;
    border-top: 1px solid var(--border-color);
}

.site-footer .container p {
    margin: 5px 0;
    line-height: 1.6;
}

.site-footer a {
    color: var(--secondary-text);
    margin: 0 8px;
}

.site-footer a:hover {
    color: var(--jd-red);
}

@media (min-width: 768px) {
    .main-container {
        grid-template-columns: 1fr 0.85fr;
         gap: 35px;
    }
    .recharge-form-section {
        order: 1;
    }
    .info-section {
        order: 2;
    }
}

@media (max-width: 767px) {
    .header-container {
        position: relative;
    }
    .main-navigation {
       display: none;
       position: absolute;
       top: calc(100% + 1px);
       left: 0;
       right: 0;
       background-color: var(--background-white);
       box-shadow: 0 4px 10px rgba(0,0,0,0.1);
       border-top: 1px solid var(--border-color);
       z-index: 999;
    }
     .main-navigation.active {
        display: block;
     }
     .main-navigation ul {
        flex-direction: column;
     }
     .main-navigation li {
        margin-left: 0;
        border-bottom: 1px solid var(--border-color);
     }
     .main-navigation li:last-child {
        border-bottom: none;
     }
     .main-navigation a {
        display: block;
        padding: 12px 20px;
        border-bottom: none;
     }
      .main-navigation a:hover,
      .main-navigation a.active {
          color: var(--jd-red);
          background-color: var(--hover-light-bg);
          border-bottom-color: transparent;
     }
    .menu-toggle {
        display: block;
    }
     main {
        padding: 20px 0 30px 0;
     }
     .main-container {
        padding: 0 10px;
        gap: 20px;
    }
    .recharge-form-section, .info-block {
        padding: 20px;
    }
    .recharge-form-section h2, .info-section h2 {
        font-size: 1.3em;
        margin-bottom: 20px;
    }
    .info-block h3 {
        font-size: 1.1em;
        margin-bottom: 12px;
    }
    .form-group input[type="tel"],
    .form-group input[type="text"],
    .form-group input[type="password"] {
        padding: 9px 10px;
    }
    .button-primary {
        padding: 10px 20px;
        font-size: 1em;
    }

    .denomination-selector {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: 6px;
    }
    .denomination-button {
        font-size: 0.9em;
        padding: 7px 4px;
    }
    .card-types-explained {
        gap: 8px 15px;
        padding: 10px;
    }
    .site-footer {
        padding: 20px 0;
        font-size: 0.8em;
    }
}