.view {
    display: none;
    animation: fadeIn 0.4s ease;
    flex: 1;
}

.active-view {
    display: block;
}

#chatView.active-view {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
}

.hero {
    text-align: center;
    margin: 3rem 0 2rem;
}

.tech-badge {
    display: inline-block;
    border: 1px solid var(--accent-gold);
    border-radius: 40px;
    padding: 0.3rem 1rem;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.2rem;
    font-family: "Noto Serif SC", serif;
    background: linear-gradient(120deg, var(--accent-gold), #db9f5c, #e6b450);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.hero p {
    color: var(--text-secondary);
    margin-top: 1rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.cta-btn {
    background: linear-gradient(95deg, var(--accent-gold), #c48a3c);
    border: none;
    color: #1f1b14;
    font-weight: 700;
    font-size: 1.2rem;
    padding: 0.9rem 2.5rem;
    border-radius: 48px;
    cursor: pointer;
    transition: transform 0.2s;
    margin-top: 2rem;
}

.cta-btn:hover {
    transform: translateY(-1px);
}


.card-grid {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 3rem 0;
}

.feature-card {
    background: var(--surface);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 8px;
    padding: 1.6rem;
    width: 240px;
    border: 1px solid var(--border-light);
    text-align: center;
    box-shadow: var(--panel-shadow), var(--glass-highlight), var(--glass-outline);
}

.feature-card i {
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

.feature-card p {
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

.chat-container {
    flex: 1 1 auto;
    min-height: 0;
    position: relative;
    background: var(--surface-muted);
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    border-radius: 8px;
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--panel-shadow), var(--glass-highlight), var(--glass-outline);
}

.chat-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    height: 100%;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

.sidebar-scrim,
.sidebar-close-btn,
.mobile-history-btn {
    display: none;
}

.conversation-sidebar {
    border-right: 1px solid var(--border-light);
    background: var(--sidebar-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    padding: 1rem 1rem 0.9rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--sidebar-header-glow);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
}

.sidebar-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.sidebar-title {
    font-family: "Noto Serif SC", serif;
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.conversation-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.conversation-item {
    width: 100%;
    border: 1px solid var(--border-light);
    background: var(--sidebar-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 8px;
    padding: 0.85rem 0.9rem;
    text-align: left;
    cursor: pointer;
    color: var(--text-primary);
    transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.conversation-item:hover {
    background: var(--sidebar-card-hover);
    border-color: rgba(201, 160, 61, 0.45);
    transform: translateY(-1px);
}

.conversation-item.active {
    border-color: var(--accent-gold);
    background: var(--sidebar-card-active);
    box-shadow: inset 0 0 0 1px rgba(201, 160, 61, 0.9);
}

.conversation-item-title {
    font-weight: 600;
    margin-bottom: 0.3rem;
    line-height: 1.35;
}

.conversation-item-preview,
.conversation-item-time {
    color: var(--text-secondary);
    font-size: 0.86rem;
}

.conversation-item-preview {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.45;
    min-height: 2.6em;
}

.conversation-item-time {
    margin-top: 0.45rem;
    opacity: 0.88;
}

.chat-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: var(--chat-main-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    overflow: hidden;
}

.chat-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--nav-gap);
    padding: var(--nav-padding-block) var(--nav-padding-inline);
    background: var(--nav-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--nav-border);
}

.chat-toolbar-actions {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.quota-pill {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(201, 160, 61, 0.32);
    background: rgba(201, 160, 61, 0.12);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    color: var(--text-primary);
    font-size: 0.92rem;
    white-space: nowrap;
    box-shadow: var(--glass-highlight);
}

.chat-current {
    font-family: "Noto Serif SC", serif;
    font-size: 1.02rem;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.icon-text-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    border: 1px solid var(--border-light);
    background: var(--input-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    color: var(--text-primary);
    border-radius: 999px;
    padding: 0.45rem 0.85rem;
    cursor: pointer;
    font: inherit;
    white-space: nowrap;
    transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.icon-text-btn:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    background: var(--sidebar-card-hover);
}

.chat-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 1.4rem 1.4rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 85%;
    min-width: 0;
    animation: fadeIn 0.2s;
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message .avatar {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    background: linear-gradient(145deg, #dba54e, #bd802e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message.user .avatar {
    background: #5f5142;
    color: #ecd9b4;
}

.bubble {
    background: var(--chat-bubble-ai);
    backdrop-filter: blur(calc(var(--glass-blur) - 4px)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(calc(var(--glass-blur) - 4px)) saturate(var(--glass-saturate));
    flex: 1 1 auto;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
    padding: 0.8rem 1.2rem;
    border-radius: 24px;
    border-bottom-left-radius: 6px;
    line-height: 1.7;
    word-break: break-word;
    box-shadow: var(--glass-highlight);
}

.message.user .bubble {
    background: var(--chat-bubble-user);
    border-bottom-right-radius: 6px;
    border-bottom-left-radius: 24px;
}

.bubble h1,
.bubble h2,
.bubble h3,
.bubble h4 {
    font-family: "Noto Serif SC", serif;
    line-height: 1.35;
    margin: 0.35rem 0 0.5rem;
}

.bubble h1 {
    font-size: 1.45rem;
}

.bubble h2 {
    font-size: 1.25rem;
}

.bubble h3 {
    font-size: 1.1rem;
}

.bubble h4 {
    font-size: 1rem;
}

.bubble p,
.bubble ul,
.bubble ol,
.bubble blockquote,
.bubble pre,
.bubble hr,
.bubble .table-wrap {
    margin: 0.45rem 0;
}

.bubble ul,
.bubble ol {
    padding-left: 1.3rem;
}

.bubble hr {
    border: 0;
    border-top: 1px solid var(--border-light);
}

.bubble code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(127, 92, 40, 0.13);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
}

.bubble pre {
    overflow-x: auto;
    padding: 0.8rem;
    border-radius: 8px;
    background: rgba(30, 26, 21, 0.1);
}

.bubble pre code {
    background: transparent;
    padding: 0;
}

.bubble blockquote {
    border-left: 3px solid var(--accent-gold);
    padding-left: 0.8rem;
    color: var(--text-secondary);
}

.bubble a {
    color: var(--accent-red);
}

.welcome-copy {
    line-height: 1.75;
}

.welcome-prompts {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    margin-top: 0.95rem;
}

.welcome-prompt-btn {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    border: 1px solid var(--border-light);
    background: rgba(255, 255, 255, 0.34);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    color: var(--text-primary);
    border-radius: 16px;
    padding: 0.8rem 0.95rem;
    text-align: left;
    font: inherit;
    line-height: 1.55;
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.welcome-prompt-btn:hover,
.welcome-prompt-btn:focus-visible {
    transform: translateY(-1px);
    border-color: rgba(201, 160, 61, 0.48);
    background: rgba(255, 252, 245, 0.72);
}

body.dark .welcome-prompt-btn,
html.dark .welcome-prompt-btn,
html:has(body.dark) .welcome-prompt-btn {
    border-color: rgba(230, 180, 80, 0.14);
    background: rgba(28, 35, 46, 0.88);
    backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        inset 0 0 0 1px rgba(255, 255, 255, 0.02),
        0 14px 32px -24px rgba(0, 0, 0, 0.72);
}

body.dark .welcome-prompt-btn:hover,
body.dark .welcome-prompt-btn:focus-visible,
html.dark .welcome-prompt-btn:hover,
html.dark .welcome-prompt-btn:focus-visible,
html:has(body.dark) .welcome-prompt-btn:hover,
html:has(body.dark) .welcome-prompt-btn:focus-visible {
    border-color: rgba(230, 180, 80, 0.34);
    background: rgba(34, 42, 54, 0.94);
}

.bubble strong {
    font-weight: 700;
}

.bubble del {
    opacity: 0.72;
}

.bubble .table-wrap {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}

.bubble table {
    width: 100%;
    border-collapse: collapse;
    min-width: 360px;
    font-size: 0.95rem;
}

.bubble th,
.bubble td {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border-light);
    text-align: left;
    vertical-align: top;
}

.bubble th {
    background: rgba(127, 92, 40, 0.08);
    font-weight: 700;
}

.chat-input-area {
    padding: 1rem 1.1rem 1.1rem;
    background: var(--toolbar-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-top: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-input-row {
    display: flex;
    gap: 12px;
}

.chat-input-row input {
    flex: 1;
    min-width: 0;
    padding: 0.9rem 1.2rem;
    border-radius: 60px;
    border: 1px solid var(--border-light);
    background: var(--input-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    color: var(--text-primary);
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.chat-input-row button {
    -webkit-appearance: none;
    appearance: none;
    background: var(--accent-gold);
    border: none;
    color: #1f1b14;
    width: 48px;
    flex: 0 0 48px;
    border-radius: 60px;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 12px 26px -18px rgba(201, 160, 61, 0.7), var(--glass-highlight);
}

.chat-input-row button i {
    pointer-events: none;
}

.chat-input-row button:disabled {
    cursor: wait;
    opacity: 0.72;
}

.chat-disclaimer-short {
    display: none;
}

.chat-disclaimer-text {
    color: var(--text-secondary);
    font-size: 0.76rem;
    line-height: 1.45;
    opacity: 0.88;
    text-align: center;
}

.profile-panel {
    max-width: 680px;
    margin: 3rem auto;
    padding: 1.5rem;
    background: var(--surface);
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    border: 1px solid var(--border-light);
    border-radius: 8px;
    box-shadow: var(--panel-shadow), var(--glass-highlight), var(--glass-outline);
}

.profile-header {
    display: flex;
    justify-content: space-between;
    gap: var(--nav-gap);
    align-items: center;
    margin-bottom: var(--nav-margin-bottom);
    padding: var(--nav-padding-block) var(--nav-padding-inline);
    background: var(--nav-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 0;
    border-bottom: 1px solid var(--nav-border);
    border-radius: 0;
}

.profile-main {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.profile-avatar {
    width: 72px;
    height: 72px;
    flex: 0 0 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #dba54e, #bd802e);
    color: #1f1b14;
    font-size: 1.8rem;
}

.profile-main h2 {
    font-family: "Noto Serif SC", serif;
    font-size: 1.6rem;
}

.profile-main p {
    color: var(--text-secondary);
    margin-top: 0.35rem;
}

.profile-actions {
    margin-top: 2rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
    margin-top: 1.6rem;
}

.profile-stat-card,
.membership-plan-card,
.order-item,
.empty-state {
    border: 1px solid var(--border-light);
    background: var(--sidebar-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-radius: 8px;
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.profile-stat-card {
    padding: 1rem;
}

.profile-stat-label,
.membership-section-head p,
.order-item-meta,
.order-item-status,
.profile-note,
.empty-state {
    color: var(--text-secondary);
}

.profile-stat-value {
    margin-top: 0.45rem;
    font-size: 1.9rem;
    font-family: "Noto Serif SC", serif;
}

.membership-section {
    margin-top: 1.7rem;
}

.membership-section-head h3 {
    font-family: "Noto Serif SC", serif;
    font-size: 1.15rem;
}

.membership-section-head p {
    margin-top: 0.35rem;
    line-height: 1.6;
}

.membership-plans {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
    margin-top: 1rem;
}

.membership-plan-card {
    padding: 1rem;
}

.membership-plan-name {
    font-weight: 700;
}

.membership-plan-price {
    margin-top: 0.55rem;
    font-size: 1.8rem;
    font-family: "Noto Serif SC", serif;
}

.membership-plan-quota {
    margin-top: 0.25rem;
    color: var(--text-secondary);
}

.membership-buy-btn {
    width: 100%;
    margin-top: 1rem;
}

.profile-note {
    margin-top: 0.9rem;
    line-height: 1.6;
}

.orders-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    margin-top: 1rem;
}

.order-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.95rem 1rem;
}

.order-item-title {
    font-weight: 600;
}

.order-item-meta,
.order-item-status {
    margin-top: 0.25rem;
    font-size: 0.9rem;
}

.order-item-side {
    text-align: right;
}

.order-item-action {
    margin-top: 0.45rem;
    border: 0;
    padding: 0;
    background: transparent;
    color: var(--accent-gold);
    font-size: 0.88rem;
    cursor: pointer;
}

.empty-state {
    padding: 1rem;
    line-height: 1.6;
}

.quota-modal {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.2rem;
    overflow: hidden;
}

.quota-modal.is-open {
    display: flex;
}

.quota-modal-backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    background: rgba(14, 11, 8, 0.58);
    backdrop-filter: blur(6px);
}

.quota-modal-card {
    position: relative;
    z-index: 1;
    width: min(640px, 100%);
    max-height: min(88dvh, 820px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 1.4rem;
    border-radius: 18px;
    border: 1px solid rgba(201, 160, 61, 0.28);
    background: linear-gradient(180deg, rgba(255, 252, 246, 0.98), rgba(249, 241, 227, 0.97));
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    box-shadow: 0 36px 80px -42px rgba(38, 25, 11, 0.72);
}

body.dark .quota-modal-card,
html.dark .quota-modal-card,
html:has(body.dark) .quota-modal-card {
    background: linear-gradient(180deg, rgba(24, 29, 37, 0.98), rgba(18, 23, 31, 0.98));
}

.quota-modal-close {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
}

.quota-modal-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    background: rgba(201, 160, 61, 0.15);
    color: var(--accent-gold);
    font-size: 0.88rem;
}

.quota-modal-card h3 {
    margin-top: 1rem;
    font-family: "Noto Serif SC", serif;
    font-size: 1.8rem;
}

.quota-modal-copy,
.quota-modal-note {
    margin-top: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.quota-modal-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 1rem;
}

.quota-modal-stat {
    padding: 0.95rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: var(--sidebar-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.quota-modal-stat span {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quota-modal-stat strong {
    display: block;
    margin-top: 0.4rem;
    font-size: 1.3rem;
    font-family: "Noto Serif SC", serif;
}

.quota-modal-plans {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 1rem;
}

.quota-modal-plan {
    padding: 1rem;
    border-radius: 14px;
    border: 1px solid var(--border-light);
    background: var(--sidebar-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.quota-modal-plan-name {
    font-weight: 700;
}

.quota-modal-plan-price {
    margin-top: 0.5rem;
    font-size: 1.5rem;
    font-family: "Noto Serif SC", serif;
}

.quota-modal-plan-quota {
    margin-top: 0.2rem;
    color: var(--text-secondary);
}

.quota-modal-plan .auth-btn {
    width: 100%;
    margin-top: 0.9rem;
}

.quota-modal-secondary {
    margin-top: 1rem;
}

.payment-modal {
    position: fixed;
    inset: 0;
    z-index: 95;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.2rem;
    overflow: hidden;
}

.payment-modal.is-open {
    display: flex;
}

.payment-modal-backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    background: rgba(14, 11, 8, 0.6);
    backdrop-filter: blur(8px);
}

.payment-modal-card {
    position: relative;
    z-index: 1;
    width: min(720px, 100%);
    max-height: min(90dvh, 860px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 1.45rem;
    border-radius: 20px;
    border: 1px solid rgba(201, 160, 61, 0.28);
    background: linear-gradient(180deg, rgba(255, 252, 246, 0.98), rgba(249, 241, 227, 0.97));
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate));
    box-shadow: 0 36px 80px -42px rgba(38, 25, 11, 0.72);
}

body.dark .payment-modal-card,
html.dark .payment-modal-card,
html:has(body.dark) .payment-modal-card {
    background: rgba(18, 23, 31, 0.96);
}

.payment-modal-close {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
}

.payment-modal-card h3 {
    margin-top: 1rem;
    font-family: "Noto Serif SC", serif;
    font-size: 1.7rem;
}

.payment-modal-copy,
.payment-modal-note {
    margin-top: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.payment-modal-section {
    margin-top: 1.05rem;
}

.payment-modal-section-title {
    margin-bottom: 0.7rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.payment-platform-card,
.payment-product-card,
.payment-info-item {
    border-radius: 14px;
    border: 1px solid var(--border-light);
    background: var(--sidebar-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    box-shadow: var(--glass-highlight), var(--glass-outline);
}

.payment-platform-card {
    padding: 1rem 1.05rem;
    font-weight: 700;
    font-size: 1.05rem;
}

.payment-info-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
}

.payment-info-item {
    padding: 0.95rem 1rem;
}

.payment-info-item span {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.payment-info-item strong {
    display: block;
    margin-top: 0.38rem;
    line-height: 1.5;
    font-weight: 700;
}

#paymentOrderNo {
    font-size: 0.9rem;
    line-height: 1.65;
    word-break: break-all;
    overflow-wrap: anywhere;
}

.payment-product-card {
    padding: 1rem 1.05rem;
}

.payment-product-name {
    font-weight: 700;
    font-size: 1.08rem;
}

.payment-product-desc {
    margin-top: 0.45rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.payment-product-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.8rem;
}

.payment-product-meta span {
    color: var(--text-secondary);
}

.payment-product-meta strong {
    font-size: 1.35rem;
    font-family: "Noto Serif SC", serif;
}

.payment-submit-btn {
    width: 100%;
    margin-top: 1rem;
}

.payment-secondary-btn {
    width: 100%;
}

@media (max-width: 680px) {
    .chat-shell {
        grid-template-columns: 1fr;
    }

    .conversation-sidebar {
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 40;
        width: min(280px, 78vw);
        max-height: none;
        border-right: 1px solid var(--border-light);
        border-bottom: 0;
        box-shadow: none;
        transform: translateX(-105%);
        transition: transform 0.24s ease;
    }

    #chatView.conversation-sidebar-open .conversation-sidebar {
        transform: translateX(0);
    }

    .sidebar-scrim {
        position: absolute;
        inset: 0;
        z-index: 35;
        border: 0;
        background: rgba(12, 10, 8, 0.42);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    #chatView.conversation-sidebar-open .sidebar-scrim {
        display: block;
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar-close-btn,
    .mobile-history-btn {
        align-items: center;
        justify-content: center;
        border: 1px solid var(--border-light);
        background: var(--input-bg);
        color: var(--text-primary);
        cursor: pointer;
    }

    .sidebar-close-btn {
        display: inline-flex;
        width: 36px;
        height: 36px;
        flex: 0 0 36px;
        border-radius: 50%;
    }

    .mobile-history-btn {
        display: inline-flex;
        width: 40px;
        height: 40px;
        flex: 0 0 40px;
        border-radius: 50%;
    }

    .chat-container {
        min-height: 0;
        border-radius: 8px;
        box-shadow: none;
    }

    .hero {
        margin: 1.7rem 0 1.4rem;
    }

    .hero h1 {
        font-size: clamp(2rem, 10vw, 2.45rem);
        line-height: 1.18;
    }

    .hero p {
        max-width: 34rem;
        margin-left: auto;
        margin-right: auto;
        font-size: 1rem;
        line-height: 1.75;
    }

    .tech-badge {
        font-size: 0.92rem;
        margin-bottom: 1rem;
    }

    .cta-btn {
        width: 100%;
        min-height: 48px;
        padding: 0.85rem 1.2rem;
        font-size: 1rem;
    }

    .payment-modal {
        align-items: flex-end;
        padding: 0;
    }

    .payment-modal-card {
        width: 100%;
        max-height: min(88dvh, 900px);
        border-radius: 20px 20px 0 0;
        padding: 1rem 0.9rem calc(0.95rem + env(safe-area-inset-bottom));
    }

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

    .payment-modal-card h3 {
        font-size: 1.35rem;
        line-height: 1.35;
        padding-right: 2.1rem;
    }

    .payment-modal-copy,
    .payment-modal-note {
        font-size: 0.92rem;
        line-height: 1.65;
    }

    .payment-modal-section {
        margin-top: 0.9rem;
    }

    .payment-modal-section-title {
        margin-bottom: 0.55rem;
        font-size: 0.88rem;
    }

    .payment-platform-card,
    .payment-product-card,
    .payment-info-item {
        border-radius: 12px;
    }

    .payment-platform-card,
    .payment-product-card,
    .payment-info-item {
        padding-left: 0.9rem;
        padding-right: 0.9rem;
    }

    .payment-product-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    .payment-product-meta strong {
        font-size: 1.2rem;
    }

    .payment-submit-btn {
        min-height: 48px;
        margin-top: 0.9rem;
    }


    .card-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.9rem;
        margin: 1.5rem 0 0;
    }

    .feature-card {
        width: 100%;
        padding: 1.15rem;
    }

    .message {
        max-width: 95%;
    }

    .message .avatar {
        width: 34px;
        height: 34px;
        flex-basis: 34px;
    }

    .bubble {
        padding: 0.75rem 0.95rem;
        border-radius: 18px;
        border-bottom-left-radius: 6px;
        font-size: 0.95rem;
        line-height: 1.65;
    }

    .message.user .bubble {
        border-bottom-left-radius: 18px;
        border-bottom-right-radius: 6px;
    }

    .chat-toolbar,
    .profile-header {
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 0.55rem;
    }

    .chat-toolbar {
        flex-wrap: nowrap;
        padding: var(--nav-padding-block) var(--nav-padding-inline);
    }

    .chat-current {
        flex: 1;
    }

    .chat-toolbar-actions {
        width: auto;
        flex: 0 0 auto;
        flex-wrap: nowrap;
        gap: 0.4rem;
    }

    .quota-pill {
        min-height: 36px;
        padding: 0.3rem 0.75rem;
        font-size: 0.84rem;
    }

    .icon-text-btn {
        flex: 1;
        justify-content: center;
        min-height: 40px;
        padding: 0.45rem 0.65rem;
        font-size: 0.92rem;
    }

    .chat-toolbar-actions .icon-text-btn {
        width: 40px;
        min-width: 40px;
        height: 40px;
        flex: 0 0 40px;
        position: relative;
        display: block;
        border-radius: 50%;
        padding: 0;
        gap: 0;
        font-size: 0;
    }

    .chat-toolbar-actions .icon-text-btn i {
        font-size: 1rem;
        line-height: 1;
        display: block;
        position: absolute;
        left: 50%;
        top: calc(50% + 2px);
        transform: translate(-50%, -50%);
    }

    .sidebar-header {
        padding: max(0.8rem, env(safe-area-inset-top)) 0.8rem 0.8rem;
    }

    .conversation-list {
        padding: 0.45rem;
    }

    .conversation-item {
        padding: 0.55rem 0.45rem;
    }

    .conversation-item-title {
        font-size: 0.86rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .conversation-item-preview {
        min-height: 0;
        font-size: 0.76rem;
        -webkit-line-clamp: 1;
    }

    .conversation-item-time {
        font-size: 0.72rem;
    }

    .chat-messages {
        padding: 1rem 0.85rem 0.8rem;
    }

    .welcome-prompts {
        gap: 0.6rem;
        margin-top: 0.8rem;
    }

    .welcome-prompt-btn {
        padding: 0.72rem 0.82rem;
        border-radius: 14px;
        font-size: 0.92rem;
    }

    .chat-input-area {
        gap: 8px;
        padding: 0.75rem;
    }

    .chat-input-row {
        gap: 0.7rem;
    }

    .chat-input-row input {
        min-height: 44px;
        padding: 0.75rem 0.9rem;
        font-size: 16px;
    }

    .chat-input-row button {
        width: 44px;
        flex-basis: 44px;
        min-height: 44px;
    }

    .chat-disclaimer-full {
        display: none;
    }

    .chat-disclaimer-short {
        display: inline;
    }

    .chat-disclaimer-text {
        font-size: 0.68rem;
        text-align: center;
        white-space: nowrap;
    }

    .profile-panel {
        margin: 1.5rem auto;
        padding: 1.15rem;
    }

    .profile-main {
        align-items: flex-start;
    }

    .profile-stats,
    .membership-plans,
    .quota-modal-plans,
    .quota-modal-stats {
        grid-template-columns: 1fr;
    }

    .order-item {
        align-items: flex-start;
        flex-direction: column;
    }

    .order-item-side {
        text-align: left;
    }

    .quota-modal-card {
        width: min(100%, 560px);
        max-height: min(90dvh, 760px);
        padding: 1.15rem;
    }

    .quota-modal-card h3 {
        font-size: 1.45rem;
        padding-right: 2rem;
    }

    .quota-modal-plan .auth-btn,
    .quota-modal-secondary {
        min-height: 46px;
    }
}

@media (max-width: 520px) {
    .quota-modal {
        align-items: flex-end;
        justify-content: stretch;
        padding: max(0.5rem, env(safe-area-inset-top)) 0 0;
    }

    .quota-modal-card {
        width: 100%;
        max-height: min(92dvh, 900px);
        margin-top: auto;
        padding: 1rem 1rem calc(1rem + env(safe-area-inset-bottom));
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
        border-left: 0;
        border-right: 0;
        box-shadow: 0 -20px 56px -28px rgba(18, 12, 6, 0.62);
    }

    .quota-modal-card::before {
        content: "";
        display: block;
        width: 42px;
        height: 5px;
        margin: 0 auto 0.95rem;
        border-radius: 999px;
        background: rgba(127, 92, 40, 0.28);
    }

    .quota-modal-close {
        top: 0.75rem;
        right: 0.75rem;
        width: 40px;
        height: 40px;
    }

    .quota-modal-badge {
        font-size: 0.82rem;
        padding: 0.3rem 0.7rem;
    }

    .quota-modal-card h3 {
        margin-top: 0.8rem;
        font-size: 1.28rem;
        line-height: 1.3;
    }

    .quota-modal-copy,
    .quota-modal-note {
        margin-top: 0.55rem;
        font-size: 0.94rem;
        line-height: 1.65;
    }

    .quota-modal-stats {
        gap: 0.65rem;
        margin-top: 0.85rem;
    }

    .quota-modal-stat {
        padding: 0.85rem 0.9rem;
        border-radius: 10px;
    }

    .quota-modal-stat strong {
        font-size: 1.18rem;
    }

    .quota-modal-plans {
        gap: 0.7rem;
        margin-top: 0.85rem;
    }

    .quota-modal-plan {
        padding: 0.9rem;
        border-radius: 12px;
    }

    .quota-modal-plan-price {
        font-size: 1.35rem;
    }

    .quota-modal-plan .auth-btn {
        min-height: 48px;
        margin-top: 0.8rem;
    }

    .quota-modal-secondary {
        width: 100%;
        justify-content: center;
        min-height: 46px;
        margin-top: 0.9rem;
    }
}

@media (max-width: 360px) {
    .quota-modal-card {
        padding-left: 0.85rem;
        padding-right: 0.85rem;
    }

    .quota-modal-card h3 {
        font-size: 1.18rem;
    }

    .quota-modal-plan-name,
    .quota-modal-plan-quota,
    .quota-modal-copy,
    .quota-modal-note {
        font-size: 0.9rem;
    }
}

@media (max-width: 420px) {
    .chat-container {
        min-height: 0;
    }

    .conversation-sidebar {
        width: min(250px, 82vw);
    }

    .chat-toolbar-actions .icon-text-btn {
        width: 38px;
        min-width: 38px;
        height: 38px;
        flex-basis: 38px;
    }

    .chat-current {
        width: auto;
    }

    .profile-main {
        flex-direction: column;
    }
}