:root {
    --base-bg: #EBE5D8;
    --sidebar-bg: #FBF8F3;
    --card-bg: #FBF8F3;
    --header-main-bg: #5D4E3C;
    --header-sub-bg: #F0EBE3;
    --text-title: #4A3F35;
    --text-body: #7A6E5D;
    --accent: #A67C52;
    --border: #E0D5C7;
    --shadow: 0 4px 12px rgba(93, 78, 60, 0.08);
    --side-l1: #E2D9CB;
    --side-l2: #EBE5DB;
    --side-l3: #F0EBE2;
    --side-l4: #F5F0E8;
    --side-l5: #FBF8F3;
}

[data-theme="dark"] {
    --base-bg: #0F172A;
    --sidebar-bg: #1E293B;
    --card-bg: #1E293B;
    --header-main-bg: #020617;
    --header-sub-bg: #1E293B;
    --text-title: #F9FAFB;
    --text-body: #94A3B8;
    --accent: #38BDF8;
    --border: #334155;
    --shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    --side-l1: #475569;
    --side-l2: #334155;
    --side-l3: #293548;
    --side-l4: #1E293B;
    --side-l5: #0F172A;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, 'PingFang SC', sans-serif;
}

body {
    background-color: var(--base-bg);
    color: var(--text-body);
    transition: background 0.3s, color 0.3s;
    line-height: 1.5;
}

button { cursor: pointer; border: none; background: none; transition: 0.2s; color: inherit; }
ul { list-style: none; }

#site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

#header-main {
    background-color: var(--header-main-bg);
    color: #FFFFFF;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    box-shadow: var(--shadow);
    flex-wrap: wrap;
    gap: 8px 16px;
}

#brand-logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

#brand-logo .main-title {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: #FFFFFF;
}

#brand-logo .sub-title {
    font-size: 0.7rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.5px;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-controls button,
.header-controls .header-tab-btn {
    white-space: nowrap;
    flex-shrink: 0;
}

.header-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: 10px;
    background: linear-gradient(135deg, #E07A1F 0%, #D46B15 100%);
    color: #FFFFFF;
    font-size: 0.88rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    letter-spacing: 0.2px;
    box-shadow: 0 2px 6px rgba(224, 122, 31, 0.25);
}

.header-tab-btn:hover {
    background: linear-gradient(135deg, #C46A18 0%, #B85A10 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(224, 122, 31, 0.35);
}

.header-tab-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(224, 122, 31, 0.2);
}

[data-theme="dark"] .header-tab-btn {
    background: linear-gradient(135deg, #38BDF8 0%, #0EA5E9 100%);
    box-shadow: 0 2px 6px rgba(56, 189, 248, 0.25);
}

[data-theme="dark"] .header-tab-btn:hover {
    background: linear-gradient(135deg, #0EA5E9 0%, #0284C7 100%);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.35);
}

[data-theme="dark"] .header-tab-btn:active {
    box-shadow: 0 1px 4px rgba(56, 189, 248, 0.2);
}

.header-dropdown {
    position: relative;
    flex-shrink: 0;
}

.header-dropdown-trigger .icon-arrow {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
    margin-left: 4px;
}

.header-dropdown.active .header-dropdown-trigger .icon-arrow {
    transform: rotate(180deg);
}

.header-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
    overflow: hidden;
}

.header-dropdown.active .header-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-title);
    text-decoration: none;
    transition: background 0.15s;
    white-space: nowrap;
}

.header-dropdown-item:hover {
    background: rgba(166, 124, 82, 0.1);
}

[data-theme="dark"] .header-dropdown-item:hover {
    background: rgba(56, 189, 248, 0.1);
}

.header-dropdown-item:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

#layout-container {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
}

#sidebar-navigation {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    flex-shrink: 0;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
    overflow-y: auto;
}

#sidebar-navigation .sidebar-title {
    position: sticky;
    top: 0;
    background-color: var(--sidebar-bg);
    z-index: 1;
}

.category-node {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 14px 24px;
    text-align: left;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.category-node .node-name-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.count-badge {
    font-size: 0.7rem;
    color: var(--text-body);
    opacity: 0.5;
    font-weight: 400;
    padding-left: 4px;
}

.level-1 { background-color: var(--side-l1); font-weight: 700; color: var(--text-title); }
.level-2 { background-color: var(--side-l2); padding-left: 32px; padding-right: 24px; font-weight: 600; }
.level-3 { background-color: var(--side-l3); padding-left: 48px; padding-right: 24px; font-size: 0.98rem; }
.level-4 { background-color: var(--side-l4); padding-left: 64px; padding-right: 24px; font-size: 0.93rem; }
.level-5 { background-color: var(--side-l5); padding-left: 80px; padding-right: 24px; font-size: 0.88rem; }

.sub-group { display: none; }
.sub-group.active { display: block; }

#main-content {
    flex: 1;
    padding: 40px 40px 100px 40px;
    overflow-y: auto;
}

#hero-announcement {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

#hero-announcement p {
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
    word-break: keep-all;
    overflow-wrap: break-word;
}

.hero-join-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 16px;
    border-radius: 8px;
    background-color: #12B7F5;
    color: #FFFFFF;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: opacity 0.2s;
}

.hero-join-link:hover {
    opacity: 0.85;
}

.hero-verify-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 16px;
    border-radius: 8px;
    background-color: var(--accent);
    color: #FFFFFF;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: opacity 0.2s;
}

.hero-verify-link:hover {
    opacity: 0.85;
}

.badge-new {
    background-color: var(--accent);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.section-header {
    margin: 0 0 16px 0;
    font-size: 1.1rem;
    color: var(--text-title);
    line-height: 1.4;
}

.pagination-container {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 90vw;
    max-width: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    z-index: 100;
    background: rgba(251, 248, 243, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(93, 78, 60, 0.12);
    border: 1px solid rgba(224, 213, 199, 0.5);
}

[data-theme="dark"] .pagination-container {
    background: rgba(30, 41, 59, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background-color: var(--card-bg);
    color: var(--text-title);
    font-size: 0.85rem;
    transition: all 0.2s;
}

.page-btn:hover:not(.disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.page-btn.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #FFFFFF;
}

.page-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.page-ellipsis {
    padding: 8px 4px;
    color: var(--text-body);
    font-size: 0.85rem;
}

.category-node.selected {
    background-color: var(--accent) !important;
    color: #FFFFFF !important;
}

.category-node.selected .icon-arrow {
    color: #FFFFFF;
}

#product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: row;
    align-items: center;
    position: relative;
    cursor: pointer;
    height: 160px;
}

.card-points-badge {
    position: absolute;
    top: 10px;
    right: 12px;
    font-weight: 700;
    color: var(--accent);
    font-size: 0.95rem;
    z-index: 1;
}

.card-category-path {
    position: absolute;
    top: 10px;
    left: 12px;
    font-size: 0.7rem;
    color: var(--text-body);
    opacity: 0.7;
    z-index: 1;
    max-width: calc(100% - 90px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}

.card-points-badge .points-small {
    font-size: 0.65rem;
    font-weight: 500;
    opacity: 0.8;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow);
}

.card-thumbnail {
    width: 140px;
    height: 140px;
    flex-shrink: 0;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 12px 8px;
}

.card-thumbnail img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0.8;
}

.loading-text {
    color: var(--text-body);
    font-size: 0.85rem;
    opacity: 0.6;
}

.card-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.3;
}

.card-points {
    font-weight: 800;
    color: var(--accent);
    font-size: 1.2rem;
}

.card-points .points-label {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.7;
}

.sidebar-title {
    padding: 16px 24px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-body);
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
}

.header-intro {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    line-height: 1.6;
    margin-left: auto;
    padding-left: 28px;
    border-left: 1px solid rgba(255, 255, 255, 0.15);
    display: none;
    white-space: nowrap;
}

@media (min-width: 1025px) {
    .header-intro { display: block; }
}

@media (min-width: 1200px) {
    .header-intro { white-space: normal; max-width: 360px; }
}

.overlay-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    padding: 16px;
}

.overlay-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.overlay-panel {
    width: 80vw;
    max-width: 700px;
    height: 85vh;
    max-height: 700px;
    background: var(--card-bg);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 28px;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: transform 0.3s;
    overflow: hidden;
}

.overlay-backdrop.visible .overlay-panel {
    transform: translateY(0);
}

.overlay-close {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 1.4rem;
    color: var(--text-body);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
}

.overlay-close:hover {
    background: var(--border);
}

.overlay-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 8px;
    text-align: center;
}

.overlay-title-id {
    font-size: 0.75rem;
    color: var(--text-body);
    opacity: 0.6;
    margin-bottom: 16px;
    text-align: center;
    font-family: monospace;
}

.overlay-image-area {
    flex: 1;
    width: 100%;
    max-width: 500px;
    background: var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-body);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    min-height: 0;
}

.overlay-image-area:hover {
    background: var(--side-l1);
}

.overlay-hint {
    margin-top: 12px;
    font-size: 0.82rem;
    color: var(--text-body);
    opacity: 0.6;
    display: flex;
    align-items: center;
    gap: 4px;
}

.overlay-hint::before {
    content: '↑';
    font-size: 1rem;
}

.overlay-download-section {
    margin-top: 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.overlay-download-text {
    font-size: 0.85rem;
    color: var(--text-body);
    opacity: 0.8;
}

.overlay-download-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
}

.overlay-download-btn {
    padding: 10px 32px;
    background: var(--accent);
    color: #FFFFFF;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: opacity 0.2s;
}

.overlay-download-btn:hover {
    opacity: 0.85;
}

.overlay-points {
    margin-top: 14px;
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent);
}

.overlay-points .points-label {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.7;
}

#theme-toggle-btn { font-size: 1.2rem; }

.purchase-input-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.purchase-free-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.82rem;
    color: #16A34A;
}

[data-theme="dark"] .purchase-free-hint {
    color: #4ADE80;
}

.purchase-join-link {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 6px;
    background-color: #12B7F5;
    color: #FFFFFF;
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.purchase-join-link:hover {
    opacity: 0.85;
}

.purchase-verify-link {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 6px;
    background-color: var(--accent);
    color: #FFFFFF;
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.purchase-verify-link:hover {
    opacity: 0.85;
}

.purchase-back-btn {
    padding: 10px 14px;
    background: var(--sidebar-bg);
    color: var(--text-body);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.2s;
    width: 100%;
}

.purchase-back-btn:hover {
    background: var(--border);
}

.purchase-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--sidebar-bg);
    color: var(--text-title);
    font-size: 0.82rem;
    outline: none;
    transition: border-color 0.2s;
    min-width: 0;
    box-sizing: border-box;
}

.purchase-input:focus {
    border-color: var(--accent);
}

.purchase-confirm-btn {
    padding: 10px 20px;
    background: var(--accent);
    color: #FFFFFF;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    white-space: nowrap;
    transition: opacity 0.2s;
    width: 100%;
}

.purchase-confirm-btn:hover {
    opacity: 0.85;
}

.purchase-message {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    text-align: center;
    min-height: 20px;
    width: 100%;
    max-width: 100%;
    overflow-wrap: break-word;
    word-break: break-word;
    overflow: auto;
    box-sizing: border-box;
}

.purchase-message.error {
    background: #FEF2F2;
    color: #DC2626;
    border: 1px solid #FECACA;
}

.purchase-message.success {
    background: #F0FDF4;
    color: #16A34A;
    border: 1px solid #BBF7D0;
}

.purchase-message.info {
    background: var(--sidebar-bg);
    color: var(--text-body);
    border: 1px solid var(--border);
}

.purchase-message.warning {
    background: #FFFBEB;
    color: #D97706;
    border: 1px solid #FDE68A;
}

.purchase-message.loading {
    background: #EFF6FF;
    color: #2563EB;
    border: 1px solid #BFDBFE;
}

.purchase-message.purchased {
    background: #F3E8FF;
    color: #7C3AED;
    border: 1px solid #DDD6FE;
}

.purchase-message.first-buy {
    background: #EFF6FF;
    color: #2563EB;
    border: 1px solid #BFDBFE;
}

.purchase-message.re-download {
    background: #FFFBEB;
    color: #D97706;
    border: 1px solid #FDE68A;
}

.purchase-message.excess-download {
    background: #FFFBEB;
    color: #D97706;
    border: 1px solid #FDE68A;
}

.purchase-message.free-within-hour {
    background: #ECFDF5;
    color: #059669;
    border: 1px solid #A7F3D0;
}

.purchase-success-message {
    width: 100%;
}

.download-section-group {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255,255,255,0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.download-section-group .download-link-box {
    width: 100%;
    max-width: 100%;
    flex: none;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--sidebar-bg);
    color: var(--text-title);
    font-size: 0.82rem;
    font-family: monospace;
    outline: none;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    cursor: text;
    user-select: all;
    box-sizing: border-box;
}

.download-section-group .download-link-copy-btn,
.download-section-group .download-link-download-btn {
    width: 100%;
    max-width: 300px;
    height: 40px;
    padding: 0 16px;
    border-radius: 8px;
    background: var(--accent);
    color: #FFFFFF;
    border: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.download-section-group .download-link-copy-btn:hover,
.download-section-group .download-link-download-btn:hover {
    opacity: 0.85;
}

.download-link-box::-webkit-scrollbar {
    height: 4px;
}

.download-link-box::-webkit-scrollbar-track {
    background: transparent;
}

.download-link-box::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.download-link-copy-btn {
    flex-shrink: 0;
    width: auto;
    max-width: 200px;
    height: 40px;
    padding: 0 16px;
    border-radius: 8px;
    background: var(--accent);
    color: #FFFFFF;
    border: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.download-link-copy-btn:hover {
    opacity: 0.85;
}

.download-link-download-btn {
    width: 100%;
    max-width: 200px;
    height: 40px;
    padding: 0 16px;
    border-radius: 8px;
    background: var(--accent);
    color: #FFFFFF;
    border: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.download-link-download-btn:hover {
    opacity: 0.85;
}

.download-link-hint {
    font-size: 0.75rem;
    opacity: 0.65;
    text-align: center;
    line-height: 1.5;
    max-width: 300px;
    word-break: keep-all;
    overflow-wrap: normal;
}

[data-theme="dark"] .purchase-message.error {
    background: #450A0A;
    color: #FCA5A5;
    border-color: #7F1D1D;
}

[data-theme="dark"] .purchase-message.success {
    background: #052E16;
    color: #86EFAC;
    border-color: #14532D;
}

[data-theme="dark"] .purchase-message.warning {
    background: #451A03;
    color: #FCD34D;
    border-color: #78350F;
}

[data-theme="dark"] .purchase-message.loading {
    background: #172554;
    color: #93C5FD;
    border-color: #1E40AF;
}

[data-theme="dark"] .purchase-message.purchased {
    background: #2E1065;
    color: #C4B5FD;
    border-color: #5B21B6;
}

[data-theme="dark"] .purchase-message.first-buy {
    background: #172554;
    color: #93C5FD;
    border-color: #1E40AF;
}

[data-theme="dark"] .purchase-message.re-download {
    background: #451A03;
    color: #FCD34D;
    border-color: #78350F;
}

[data-theme="dark"] .purchase-message.excess-download {
    background: #451A03;
    color: #FCD34D;
    border-color: #78350F;
}

[data-theme="dark"] .purchase-message.free-within-hour {
    background: #064E3B;
    color: #6EE7B7;
    border-color: #065F46;
}

.purchase-transactions {
    margin-top: 16px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.purchase-trans-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-body);
    margin-bottom: 10px;
    opacity: 0.8;
}

.purchase-trans-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.purchase-trans-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--sidebar-bg);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.purchase-trans-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.purchase-trans-product {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-title);
}

.purchase-trans-date {
    font-size: 0.75rem;
    color: var(--text-body);
    opacity: 0.7;
}

.purchase-trans-points {
    font-size: 0.85rem;
    font-weight: 600;
    color: #DC2626;
}

.purchase-no-trans {
    text-align: center;
    padding: 20px;
    color: var(--text-body);
    opacity: 0.6;
    font-size: 0.85rem;
}

.purchase-trans-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    margin-top: 12px;
}

.purchase-trans-pagebtn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    background: var(--sidebar-bg);
    color: var(--text-body);
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.purchase-trans-pagebtn:hover {
    background: var(--border);
}

.purchase-trans-pagebtn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.purchase-trans-pagebtn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.purchase-trans-pageinfo {
    font-size: 0.75rem;
    color: var(--text-body);
    opacity: 0.7;
    margin-left: 8px;
}

#mobile-menu-btn {
    display: none;
    position: fixed;
    top: 8px;
    left: 12px;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 1002;
    font-size: 1.2rem;
}

#purchase-area {
    width: 100%;
    max-width: 100%;
    display: none;
    overflow: hidden;
}

#mobile-fab-container {
    display: none;
    position: fixed;
    bottom: 80px;
    right: 16px;
    z-index: 997;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

#mobile-fab-container button,
#mobile-fab-container a {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    display: flex;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

#mobile-fab-theme {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    background-color: var(--card-bg);
    color: var(--text-title);
    border: 1px solid var(--border);
}

#mobile-fab-container button:hover,
#mobile-fab-container a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] #mobile-fab-theme {
    background-color: var(--card-bg);
    border-color: var(--border);
    color: var(--text-title);
}

@media (max-width: 1024px) {
    #sidebar-navigation {
        position: fixed;
        left: -280px;
        top: 64px;
        height: calc(100vh - 64px);
        z-index: 999;
    }

    #sidebar-navigation.open {
        left: 0;
        box-shadow: 10px 0 30px rgba(0,0,0,0.1);
    }

    #mobile-menu-btn { display: block; }
    #brand-logo { padding-left: 60px; }
    #main-content { padding: 16px 16px 100px 16px; overflow-y: visible; }

    body.sidebar-open {
        overflow: hidden;
    }

    body.sidebar-open #main-content {
        pointer-events: none;
    }

    body.sidebar-open::after {
        content: '';
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 998;
        pointer-events: auto;
    }
}

@media (max-width: 600px) {
    #header-main {
        min-height: 56px;
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 6px 8px;
    }

    #brand-logo {
        padding-left: 48px;
        flex: 1 1 auto;
        min-width: 0;
    }

    #brand-logo .main-title {
        font-size: 1rem;
    }

    #brand-logo .sub-title {
        font-size: 0.55rem;
    }

    .header-controls {
        gap: 4px;
        flex: 0 0 auto;
    }

    .header-controls button,
    .header-controls .header-tab-btn {
        padding: 5px 8px;
        font-size: 0.75rem;
        border-radius: 5px;
    }

    #theme-toggle-btn,
    .header-controls .header-tab-btn {
        display: none;
    }

    #mobile-menu-btn {
        top: 6px;
        left: 8px;
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }

    #mobile-fab-container {
        display: flex;
    }

    #hero-announcement {
        padding: 14px 16px;
        margin-bottom: 20px;
        gap: 10px;
    }

    #hero-announcement p {
        font-size: 0.85rem;
    }

    .badge-new {
        font-size: 0.65rem;
        padding: 2px 6px;
    }

    .section-header {
        font-size: 1rem;
        margin-bottom: 12px;
    }

    #product-grid {
        gap: 12px;
    }

    .product-card {
        flex-direction: row;
        padding: 10px;
        height: 110px;
        border-radius: 12px;
    }

    .card-thumbnail {
        width: 80px;
        height: 80px;
        border-radius: 8px;
        padding: 6px 4px;
    }

    .card-content {
        padding: 8px 10px;
    }

    .card-title {
        font-size: 0.9rem;
        margin-bottom: 4px;
        -webkit-line-clamp: 2;
    }

    .card-content p {
        display: none;
    }

    .card-points {
        font-size: 0.95rem;
    }

    .card-points .points-label {
        font-size: 0.6rem;
    }

    .card-points-badge {
        font-size: 0.85rem;
        top: 6px;
        right: 8px;
    }

    .card-category-path {
        font-size: 0.6rem;
        top: 6px;
        left: 8px;
        max-width: calc(100% - 70px);
    }

    .overlay-panel {
        width: 92vw;
        height: 90vh;
        padding: 24px 16px;
        max-width: 92vw;
    }

    .download-link-box {
        font-size: 0.75rem;
        padding: 8px 10px;
    }

    .download-link-copy-btn {
        width: 34px;
        height: 34px;
        font-size: 0.9rem;
    }

    .download-link-hint {
        font-size: 0.75rem;
    }

    .pagination-container {
        bottom: 12px;
        padding: 8px 12px;
        gap: 4px;
        width: 95vw;
    }

    .page-btn {
        padding: 5px 8px;
        font-size: 0.75rem;
    }

    .page-ellipsis {
        padding: 5px 2px;
        font-size: 0.75rem;
    }

    #sidebar-navigation {
        top: 56px;
        height: calc(100vh - 56px);
    }

    body.sidebar-open::after {
        top: 56px;
    }
}

.icon-arrow { transition: transform 0.3s; }
.expanded .icon-arrow { transform: rotate(180deg); }
.node-active .icon-arrow { transform: rotate(180deg); }

.fullscreen-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    touch-action: none;
}

.fullscreen-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.fullscreen-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s;
    z-index: 3001;
    touch-action: auto;
}

.fullscreen-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.fullscreen-image-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.fullscreen-image {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    transition: transform 0.1s ease-out;
    cursor: zoom-in;
    user-select: none;
    -webkit-user-drag: none;
}

.fullscreen-image.zoomed {
    cursor: grab;
}

.fullscreen-image.dragging {
    cursor: grabbing;
}

.fullscreen-hint {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 16px;
}

.fullscreen-hint span {
    display: flex;
    align-items: center;
    gap: 4px;
}

@media (max-width: 600px) {
    .fullscreen-hint {
        font-size: 0.75rem;
        gap: 12px;
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loading-spinner-large {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-message {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.spinner-circle {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.85);
}

.card-fav-btn {
    position: absolute;
    bottom: 10px;
    right: 12px;
    font-size: 1.5rem;
    z-index: 2;
    color: var(--text-body);
    opacity: 0.5;
    transition: opacity 0.2s, transform 0.2s, color 0.2s;
    padding: 4px;
    line-height: 1;
}

.card-fav-btn:hover {
    opacity: 1;
    transform: scale(1.2);
}

.card-fav-btn.active {
    color: #E07A1F;
    opacity: 1;
}

[data-theme="dark"] .card-fav-btn.active {
    color: #FBBF24;
}

.overlay-fav-text-btn {
    padding: 10px 20px;
    background: var(--sidebar-bg);
    color: var(--text-body);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
}

.overlay-fav-text-btn:hover {
    background: var(--border);
}

.overlay-fav-text-btn.active {
    color: #E07A1F;
    border-color: #E07A1F;
    background: #FFF7ED;
}

[data-theme="dark"] .overlay-fav-text-btn.active {
    color: #FBBF24;
    border-color: #FBBF24;
    background: #451A03;
}

.header-tab-fav,
.header-tab-history {
    background: linear-gradient(135deg, #5B8C5A 0%, #4A7A49 100%);
    border: none;
    padding: 9px 16px;
    font-size: 0.88rem;
    font-weight: 700;
    border-radius: 10px;
    color: #FFFFFF;
    box-shadow: 0 2px 6px rgba(91, 140, 90, 0.3);
    transition: all 0.2s ease;
}

.header-tab-fav:hover,
.header-tab-history:hover {
    background: linear-gradient(135deg, #4A7A49 0%, #3D6B3C 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(91, 140, 90, 0.4);
}

.header-tab-fav:active,
.header-tab-history:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(91, 140, 90, 0.2);
}

[data-theme="dark"] .header-tab-fav,
[data-theme="dark"] .header-tab-history {
    background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

[data-theme="dark"] .header-tab-fav:hover,
[data-theme="dark"] .header-tab-history:hover {
    background: linear-gradient(135deg, #1D4ED8 0%, #1E40AF 100%);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.collection-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    padding: 16px;
}

.collection-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.collection-panel {
    width: 90vw;
    max-width: 560px;
    height: 80vh;
    max-height: 700px;
    background: var(--card-bg);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: transform 0.3s;
    overflow: hidden;
}

.collection-backdrop.visible .collection-panel {
    transform: translateY(0);
}

.collection-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.collection-panel-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-title);
}

.collection-close {
    font-size: 1.4rem;
    color: var(--text-body);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
}

.collection-close:hover {
    background: var(--border);
}

.collection-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
}

.collection-list::-webkit-scrollbar {
    width: 6px;
}

.collection-list::-webkit-scrollbar-track {
    background: transparent;
}

.collection-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.collection-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-body);
    opacity: 0.5;
    font-size: 0.95rem;
}

.collection-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    margin-bottom: 8px;
    background: var(--sidebar-bg);
    transition: background 0.2s;
    cursor: pointer;
}

.collection-item:hover {
    background: var(--border);
}

.collection-item-thumb {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    cursor: pointer;
}

.collection-item-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0.85;
}

.collection-item-info {
    flex: 1;
    min-width: 0;
}

.collection-item-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-title);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 2px;
}

.collection-item-category {
    font-size: 0.75rem;
    color: var(--text-body);
    opacity: 0.7;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 2px;
}

.collection-item-time {
    font-size: 0.7rem;
    color: var(--text-body);
    opacity: 0.5;
}

.collection-item-fav-btn {
    font-size: 1.4rem;
    color: var(--text-body);
    opacity: 0.5;
    transition: opacity 0.2s, transform 0.2s, color 0.2s;
    padding: 4px;
    line-height: 1;
    flex-shrink: 0;
}

.collection-item-fav-btn:hover {
    opacity: 1;
    transform: scale(1.2);
}

.collection-item-fav-btn.active {
    color: #E07A1F;
    opacity: 1;
}

[data-theme="dark"] .collection-item-fav-btn.active {
    color: #FBBF24;
}

.collection-clear-btn {
    display: block;
    margin: 16px auto 8px;
    padding: 8px 24px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-body);
    font-size: 0.82rem;
    transition: all 0.2s;
}

.collection-clear-btn:hover {
    background: var(--border);
    color: var(--text-title);
}

#mobile-fab-fav,
#mobile-fab-history {
    width: 44px;
    height: auto;
    min-height: 44px;
    border-radius: 10px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px;
    gap: 0;
    line-height: 1.2;
    background-color: #5B8C5A;
    border: 1px solid #5B8C5A;
    color: #FFFFFF;
}

#mobile-fab-fav .fab-line1,
#mobile-fab-fav .fab-line2,
#mobile-fab-history .fab-line1,
#mobile-fab-history .fab-line2 {
    font-size: 0.55rem;
    font-weight: 500;
    color: #FFFFFF;
    text-align: center;
}

[data-theme="dark"] #mobile-fab-fav,
[data-theme="dark"] #mobile-fab-history {
    background-color: #2563EB;
    border-color: #2563EB;
}

.mobile-dropdown {
    position: relative;
}

#mobile-fab-more {
    width: 44px;
    height: auto;
    min-height: 44px;
    border-radius: 10px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px;
    gap: 0;
    line-height: 1.2;
    background-color: #6B7280;
    border: 1px solid #6B7280;
    color: #FFFFFF;
}

#mobile-fab-more .fab-line1,
#mobile-fab-more .fab-line2 {
    font-size: 0.55rem;
    font-weight: 500;
    color: #FFFFFF;
    text-align: center;
}

[data-theme="dark"] #mobile-fab-more {
    background-color: #6366F1;
    border-color: #6366F1;
}

.mobile-dropdown-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    min-width: 140px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 1001;
    overflow: hidden;
}

.mobile-dropdown.active .mobile-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 14px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-title);
    text-decoration: none;
    transition: background 0.15s;
    white-space: nowrap;
}

.mobile-dropdown-item:hover {
    background: rgba(166, 124, 82, 0.1);
}

[data-theme="dark"] .mobile-dropdown-item:hover {
    background: rgba(56, 189, 248, 0.1);
}

.mobile-dropdown-item:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.collection-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 12px 16px 16px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.collection-page-btn {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background-color: var(--sidebar-bg);
    color: var(--text-title);
    font-size: 0.82rem;
    transition: all 0.2s;
}

.collection-page-btn:hover:not(.disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.collection-page-btn.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #FFFFFF;
}

.collection-page-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.collection-page-ellipsis {
    padding: 6px 4px;
    color: var(--text-body);
    font-size: 0.82rem;
}

@media (max-width: 600px) {
    .header-tab-fav,
    .header-tab-history {
        display: none;
    }

    .collection-panel {
        width: 95vw;
        max-width: 95vw;
        height: 85vh;
        background: #F5EFE3;
    }

    [data-theme="dark"] .collection-panel {
        background: #162032;
    }

    .collection-item {
        padding: 10px;
        gap: 10px;
    }

    .collection-item-thumb {
        width: 44px;
        height: 44px;
    }

    .collection-item-title {
        font-size: 0.85rem;
    }

    .card-fav-btn {
        font-size: 1.2rem;
        bottom: 8px;
        right: 8px;
    }
}