.custom-bg-container {
    min-height: 100vh;
    padding: 32px 16px;
}
.info-block {
    background: #fff;
    border-radius: 1.1rem;
    box-shadow: 0 4px 24px 0 rgba(68,63,170,0.07);
    padding: 2rem 1.5rem 1.5rem 1.5rem;
    margin-bottom: 2rem;
}
.info-block-title {
    font-size: 1.3rem;
    letter-spacing: 1px;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5em;
}
.info-block-title i {
    color: #3B5BA9;
    font-size: 1.25em;
}
.form-block {
    background: transparent !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin-bottom: 0 !important;
}
.activity-tabs {
    border-bottom: 2.5px solid #3B5BA9;
    margin-bottom: 0.7rem;
    background: linear-gradient(90deg,#f3f7fd 60%,#f8f3fd 100%);
    border-radius: 0.7em;
    box-shadow: 0 2px 8px 0 rgba(68,63,170,0.06);
    padding: 0.3em 0;
}
.activity-tab-link {
    color: #3B5BA9 !important;
    font-weight: 500;
    border: none !important;
    border-bottom: 3px solid transparent !important;
    background: none !important;
    transition: border-color 0.2s, color 0.2s;
    border-radius: 0.5em 0.5em 0 0;
    font-size: 1.07rem;
    padding: 0.6em 1.2em;
}
.activity-tab-link.active, .activity-tab-link:focus {
    color: #443FAA !important;
    border-bottom: 3px solid #443FAA !important;
    background: #f7f9fc !important;
}
.activity-btn {
    background: #3B5BA9 !important;
    color: #fff !important;
    font-weight: bold;
    border: none;
    border-radius: 0.7rem;
    font-size: 1.08rem;
    box-shadow: 0 2px 12px 0 rgba(68,63,170,0.10);
    transition: background 0.2s, box-shadow 0.2s;
    padding: 0.45em 0;
    letter-spacing: 0.5px;
    min-height: 42px;
    line-height: 1.2;
}
.activity-btn:hover, .activity-btn:focus {
    background: #443FAA !important;
    color: #fff !important;
    box-shadow: 0 4px 18px 0 rgba(68,63,170,0.13);
}
/* select2 樣式統一為 activity-input 風格 */
.activity-input,
.select2-container--default .select2-selection--single {
    border: 1.5px solid var(--weyi-blue);
    border-radius: 0.6rem;
    background: #f7f9fc;
    font-size: 1.05rem;
    transition: border-color 0.2s;
    height: 38px;
    padding: 0 0.5rem;
    box-sizing: border-box;
    color: #212529;
    display: flex;
    align-items: center;
}
.activity-input:focus {
    border-color: var(--weyi-purple);
    /* 保持背景色一致 */
    background: #f7f9fc;
}
.select2-container--default .select2-selection--single:focus,
.select2-container--default .select2-selection--single.select2-selection--focus {
    border-color: var(--weyi-purple);
    /* 保持背景色一致 */
    background: #f7f9fc;
    outline: none;
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
    color: #212529;
    line-height: 38px;
    padding-left: 0;
}
.select2-container--default .select2-selection--single .select2-selection__arrow {
    height: 38px;
    right: 8px;
}
.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: #3B5BA9;
    color: #fff;
}
.select2-container--default .select2-results__option[aria-selected="true"] {
    background-color: #f7f9fc;
    color: #3B5BA9;
}
.select2-dropdown {
    border-radius: 0.6rem;
    border: 1.5px solid #3B5BA9;
    font-size: 1.05rem;
}
.select2-container {
    width: 100% !important;
}
@media (max-width: 576px) {
    .custom-bg-container {
        padding: 12px 8px;
    }
    .info-block {
        padding: 1.1rem 0.7rem 0.9rem 0.9rem;
        border-radius: 0.9rem;
    }
    .info-block-title {
        font-size: 1.08rem;
    }
}