:root {
    --bg: #0a0a0f;
    --bg2: #12121a;
    --bg3: #1a1a25;
    --card: #16161f;
    --border: #2a2a3a;
    --text: #e8e8f0;
    --text2: #9494a8;
    --text3: #6a6a80;
    --accent: #6c5ce7;
    --accent2: #a29bfe;
    --success: #00cec9;
    --warning: #fdcb6e;
    --danger: #ff7675;
    --gradient: linear-gradient(135deg, #6c5ce7, #a29bfe);
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

a { color: var(--accent2); text-decoration: none; }

/* ===== Landing Page ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    background: radial-gradient(ellipse at 50% 0%, rgba(108,92,231,0.15) 0%, transparent 60%);
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108,92,231,0.15);
    border: 1px solid rgba(108,92,231,0.3);
    border-radius: 20px;
    font-size: 13px;
    color: var(--accent2);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 0%, #a29bfe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 18px;
    color: var(--text2);
    max-width: 500px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(108,92,231,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108,92,231,0.4);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover { background: var(--bg3); }

.btn-sm { padding: 8px 16px; font-size: 13px; }

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin-top: 60px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: left;
}

.feature-card .icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { font-size: 16px; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--text2); }

/* ===== Auth Pages ===== */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 400px;
    box-shadow: var(--shadow);
}

.auth-card h1 {
    font-size: 28px;
    text-align: center;
    margin-bottom: 8px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-card .subtitle {
    text-align: center;
    color: var(--text2);
    margin-bottom: 28px;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text2);
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.15);
}

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
}

.alert-error {
    background: rgba(255,118,117,0.1);
    color: var(--danger);
    border: 1px solid rgba(255,118,117,0.2);
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text3);
}

/* ===== App Layout ===== */
.app-layout {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--bg2);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 18px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-header .credits {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--bg);
    border-radius: var(--radius);
    font-size: 13px;
}

.credits .num { color: var(--warning); font-weight: 700; }

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.nav-section {
    margin-bottom: 16px;
}

.nav-section-title {
    font-size: 11px;
    color: var(--text3);
    text-transform: uppercase;
    padding: 8px 12px;
    letter-spacing: 1px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text2);
    font-size: 13px;
    transition: all 0.15s;
}

.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: rgba(108,92,231,0.15); color: var(--accent2); }

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
}

/* ===== Main Chat Area ===== */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg2);
}

.chat-header h3 { font-size: 16px; }

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.message {
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
}

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.message.user .message-avatar { background: var(--accent); }
.message.ai .message-avatar { background: var(--success); }

.message-content {
    max-width: 70%;
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

.message.user .message-content {
    background: var(--accent);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.ai .message-content {
    background: var(--bg3);
    border-bottom-left-radius: 4px;
}

.message.ai .message-content pre {
    background: var(--bg);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    font-size: 13px;
}

/* ===== Input Area ===== */
.chat-input-area {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    background: var(--bg2);
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.input-wrapper textarea {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    resize: none;
    outline: none;
    min-height: 48px;
    max-height: 200px;
    font-family: inherit;
}

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

.send-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: var(--gradient);
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-btn:hover { transform: scale(1.05); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== Welcome Screen ===== */
.welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.welcome h2 {
    font-size: 28px;
    margin-bottom: 8px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome p { color: var(--text2); margin-bottom: 32px; }

.scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    max-width: 800px;
    width: 100%;
}

.scene-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.scene-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.scene-card .icon { font-size: 28px; margin-bottom: 8px; }
.scene-card .name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.scene-card .desc { font-size: 11px; color: var(--text3); }

/* ===== History Page ===== */
.history-list {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px;
}

.history-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.history-item:hover { border-color: var(--accent); }

.history-item .scene { font-size: 12px; color: var(--accent2); margin-bottom: 6px; }
.history-item .preview { font-size: 13px; color: var(--text2); margin-bottom: 6px; }
.history-item .time { font-size: 11px; color: var(--text3); }

/* ===== Profile Page ===== */
.profile-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 24px;
}

.profile-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.profile-card h3 { font-size: 16px; margin-bottom: 16px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-item {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-item .value { font-size: 24px; font-weight: 700; color: var(--accent2); }
.stat-item .label { font-size: 12px; color: var(--text3); margin-top: 4px; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== Loading ===== */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text3);
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ===== Table ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    background: var(--bg);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text2);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.data-table tr:hover td {
    background: var(--bg3);
}

.data-table .actions {
    display: flex;
    gap: 8px;
}

/* ===== Badge ===== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-admin { background: rgba(108,92,231,0.2); color: var(--accent2); }
.badge-active { background: rgba(0,206,201,0.15); color: var(--success); }
.badge-disabled { background: rgba(255,118,117,0.15); color: var(--danger); }

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    color: var(--text3);
    font-size: 14px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent2); border-bottom-color: var(--accent); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== Pagination ===== */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 20px;
}

.page-btn {
    padding: 6px 14px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text2);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}

.page-btn:hover { border-color: var(--accent); color: var(--text); }
.page-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== Package Card ===== */
.package-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.package-card {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.package-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.package-card .pkg-name {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
}

.package-card .pkg-credits {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.package-card .pkg-label {
    font-size: 12px;
    color: var(--text3);
    margin-bottom: 16px;
}

.package-card .pkg-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--warning);
}

.package-card .pkg-price::before { content: '¥'; font-size: 14px; }

.package-card.recommended {
    border-color: var(--accent);
}

.package-card.recommended::after {
    content: '推荐';
    position: absolute;
    top: -10px;
    right: 16px;
    background: var(--gradient);
    color: white;
    font-size: 11px;
    padding: 3px 12px;
    border-radius: 10px;
    font-weight: 600;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow);
}

.modal-box h3 { margin-bottom: 12px; font-size: 18px; }
.modal-box p { color: var(--text2); font-size: 14px; margin-bottom: 24px; }
.modal-box .modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ===== Search Bar ===== */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
}

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

/* ===== Admin Stat ===== */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.admin-stat {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.admin-stat .value { font-size: 28px; font-weight: 800; color: var(--accent2); }
.admin-stat .label { font-size: 12px; color: var(--text3); margin-top: 4px; }

/* ===== Payment Method Card ===== */
.pay-method-card {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    flex: 1;
}

.pay-method-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.pay-method-card.active {
    border-color: var(--accent);
    background: rgba(108,92,231,0.1);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .hero h1 { font-size: 32px; }
    .features { grid-template-columns: 1fr; }
    .pay-method-card { padding: 16px; }
}