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

:root {
    --bg: #0a0a0a;
    --bg-secondary: #111;
    --bg-tertiary: #1a1a1a;
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --text: #fff;
    --text-secondary: #888;
    --text-tertiary: #555;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-pink: #ec4899;
    --success: #10b981;
    --error: #ef4444;
    --sidebar-width: 280px;
}

body {
    font-family: 'Noto Sans SC', 'Outfit', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
}

/* 全局自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}

/* Firefox 滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.app {
    display: flex;
    height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.back-home {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 12px;
    margin: -8px -12px;
    border-radius: 8px;
    transition: all 0.2s;
}

.back-home:hover {
    color: var(--text);
    background: rgba(255,255,255,0.05);
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.new-chat-btn:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--border-hover);
}

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

.conversation-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 4px;
}

.conversation-item:hover {
    background: rgba(255,255,255,0.05);
}

.conversation-item.active {
    background: rgba(99,102,241,0.15);
}

.conversation-item svg {
    flex-shrink: 0;
    color: var(--text-secondary);
}

.conversation-title {
    flex: 1;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-delete {
    opacity: 0;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
}

.conversation-item:hover .conversation-delete {
    opacity: 1;
}

.conversation-delete:hover {
    color: var(--error);
    background: rgba(239,68,68,0.1);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: rgba(239,68,68,0.1);
    color: #f87171;
    border-color: rgba(239,68,68,0.3);
}

/* 用户徽章 */
.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(236,72,153,0.1));
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.2s;
}

.user-badge.guest {
    cursor: pointer;
}

.user-badge.guest:hover {
    background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(236,72,153,0.2));
    border-color: rgba(99,102,241,0.4);
    color: var(--text);
}

.user-badge.logged-in {
    background: linear-gradient(135deg, rgba(34,197,94,0.1), rgba(16,185,129,0.1));
    border-color: rgba(34,197,94,0.3);
}

.user-badge .user-icon {
    color: var(--accent);
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.user-badge.logged-in .user-icon {
    color: #22c55e;
}

.user-badge span {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.logout-btn {
    width: 28px;
    height: 28px;
    padding: 0;
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.2);
    border-radius: 6px;
    color: #f87171;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logout-btn:hover {
    background: rgba(239,68,68,0.2);
    border-color: rgba(239,68,68,0.4);
}

.logout-btn.hidden {
    display: none;
}

/* 主内容区 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* 顶部栏 */
.top-header {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.top-header .menu-btn {
    display: none;
}

.header-spacer {
    flex: 1;
}

/* 对话区域 */
.chat-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* 欢迎界面 */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    text-align: center;
}

.welcome-screen.hidden {
    display: none;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-pink) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 0 60px rgba(99,102,241,0.3);
}

.welcome-icon svg {
    color: white;
}

.welcome-title {
    font-family: 'Outfit', sans-serif;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.welcome-desc {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 32px;
}

.quick-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    max-width: 600px;
}

.quick-prompt {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.quick-prompt:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.quick-prompt svg {
    color: var(--accent);
}

/* 消息列表 */
.messages {
    flex: 1;
    padding: 24px;
    display: none;
    flex-direction: column;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.messages.active {
    display: flex;
}

.message {
    display: flex;
    gap: 16px;
}

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

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-pink) 100%);
}

.message.assistant .message-avatar {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.message-avatar svg {
    color: white;
    width: 18px;
    height: 18px;
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-role {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.message-text {
    font-size: 15px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

.message-text code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
}

.message-text pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    margin: 12px 0;
}

.message-text pre code {
    background: none;
    padding: 0;
}

/* 输入区域 */
.input-area {
    padding: 16px 24px 24px;
    background: linear-gradient(180deg, transparent 0%, var(--bg) 20%);
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    display: flex;
    align-items: flex-end;
    padding: 8px;
    gap: 8px;
    transition: border-color 0.2s;
}

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

/* 模型选择器 - 在页面顶部 */
.model-selector {
    position: relative;
}

.model-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(236,72,153,0.1) 100%);
    border: 1px solid rgba(99,102,241,0.3);
    border-radius: 12px;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.model-btn:hover {
    background: linear-gradient(135deg, rgba(99,102,241,0.2) 0%, rgba(236,72,153,0.2) 100%);
    border-color: rgba(99,102,241,0.5);
    box-shadow: 0 0 20px rgba(99,102,241,0.2);
}

.model-btn svg {
    transition: transform 0.2s;
}

.model-selector.open .model-btn svg {
    transform: rotate(180deg);
}

.model-name {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    min-width: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 40px rgba(99,102,241,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.98);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    max-height: 450px;
    overflow-y: auto;
    overflow-x: hidden;
}

/* 自定义滚动条 */
.model-dropdown::-webkit-scrollbar {
    width: 6px;
}

.model-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.model-dropdown::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
}

.model-dropdown::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}

/* Firefox 滚动条 */
.model-dropdown {
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.model-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.model-empty {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.model-group {
    margin-bottom: 12px;
}

.model-group:last-child {
    margin-bottom: 0;
}

.model-group-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 14px 6px;
}

.model-group-title::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
}

.model-option {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.model-option:hover {
    background: rgba(255,255,255,0.06);
    padding-left: 18px;
}

.model-option.active {
    background: linear-gradient(135deg, rgba(99,102,241,0.2) 0%, rgba(236,72,153,0.15) 100%);
    color: var(--text);
    font-weight: 500;
}

.model-option.active::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
}

/* 输入框 */
.message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    resize: none;
    padding: 10px 8px;
    max-height: 200px;
    line-height: 1.5;
}

.message-input::placeholder {
    color: var(--text-tertiary);
}

.message-input:focus {
    outline: none;
}

/* 发送按钮 */
.send-btn {
    width: 42px;
    height: 42px;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-hint {
    text-align: center;
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 12px;
}

/* 游客登录提示 */
.guest-login-hint {
    max-width: 800px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 18px;
    background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(236,72,153,0.05) 100%);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: 12px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.guest-hint-content {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.4;
}

.guest-hint-content svg {
    flex-shrink: 0;
    color: var(--accent);
}

.guest-login-btn {
    flex-shrink: 0;
    padding: 8px 18px;
    background: linear-gradient(135deg, var(--accent) 0%, #ec4899 100%);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.guest-login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}

.guest-login-hint.hidden {
    display: none;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
    z-index: 1000;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    transform: scale(0.95);
    transition: transform 0.2s;
}

.modal-overlay.show .modal {
    transform: scale(1);
}

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

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s;
}

.modal-close:hover {
    color: var(--text);
    background: rgba(255,255,255,0.05);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

.modal-btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

.modal-btn.secondary:hover {
    background: rgba(255,255,255,0.05);
}

.modal-btn.primary {
    background: var(--accent);
    border: none;
    color: white;
}

.modal-btn.primary:hover {
    background: var(--accent-hover);
}

/* API 配置 */
.api-config-item {
    margin-bottom: 20px;
}

.api-config-item:last-child {
    margin-bottom: 0;
}

.api-config-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.api-config-input {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    font-family: 'Fira Code', monospace;
    transition: border-color 0.2s;
}

.api-config-input::placeholder {
    color: var(--text-tertiary);
}

.api-config-input:focus {
    outline: none;
    border-color: var(--accent);
}

/* 侧边栏遮罩 */
.sidebar-overlay {
    display: none;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 14px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 2000;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: var(--success);
    color: var(--success);
}

.toast.error {
    border-color: var(--error);
    color: var(--error);
}

/* 加载动画 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

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

.typing-indicator span:nth-child(1) { animation-delay: 0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 200;
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 150;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border);
    }
    
    .menu-btn {
        background: none;
        border: none;
        color: var(--text);
        cursor: pointer;
        padding: 8px;
        margin: -8px;
        border-radius: 8px;
    }
    
    .mobile-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text);
        text-decoration: none;
        font-family: 'Outfit', sans-serif;
        font-weight: 600;
        font-size: 16px;
    }
    
    .mobile-logo svg {
        color: var(--accent);
    }
    
    .mobile-spacer {
        width: 40px;
    }
    
    .welcome-screen {
        padding: 24px 16px;
    }
    
    .welcome-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
    }
    
    .welcome-icon svg {
        width: 36px;
        height: 36px;
    }
    
    .welcome-title {
        font-size: 22px;
    }
    
    .quick-prompts {
        flex-direction: column;
        width: 100%;
    }
    
    .quick-prompt {
        width: 100%;
        justify-content: flex-start;
    }
    
    .messages {
        padding: 16px;
    }
    
    .message {
        gap: 12px;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
    }
    
    .input-area {
        padding: 12px 16px 20px;
    }
    
    .input-wrapper {
        border-radius: 14px;
        padding: 6px;
    }
    
    .top-header .menu-btn {
        display: flex;
        background: none;
        border: none;
        color: var(--text);
        cursor: pointer;
        padding: 8px;
        margin: -8px;
        margin-right: 4px;
        border-radius: 8px;
    }
    
    .model-btn {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .model-name {
        max-width: 140px;
    }
    
    .model-dropdown {
        min-width: 220px;
    }
    
    .message-input {
        font-size: 16px;
        padding: 8px;
    }
    
    .send-btn {
        width: 38px;
        height: 38px;
    }
}

/* 不可用模型样式 */
.model-option.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    position: relative;
}

.model-option.disabled::after {
    content: '🔒';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
}

.model-option.disabled:hover {
    background: rgba(255,255,255,0.03);
}

/* 登录模态窗口 */
.login-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    padding: 20px;
}

.login-modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.login-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    width: 100%;
    max-width: 400px;
    padding: 32px;
    transform: scale(0.9);
    transition: transform 0.3s;
    position: relative;
}

.login-modal-overlay.show .login-modal {
    transform: scale(1);
}

.login-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s;
}

.login-modal-close:hover {
    color: var(--text);
    background: rgba(255,255,255,0.05);
}

.login-modal-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-modal-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-pink) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 0 30px rgba(99,102,241,0.3);
}

.login-modal-icon svg {
    color: white;
}

.login-modal-header h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-modal-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-modal-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.login-form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.login-form-group input {
    padding: 14px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 15px;
    transition: all 0.2s;
}

.login-form-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(99,102,241,0.05);
}

.login-form-group input::placeholder {
    color: var(--text-tertiary);
}

.code-input-group {
    display: flex;
    gap: 12px;
}

.code-input-group input {
    flex: 1;
}

.send-code-btn {
    padding: 0 20px;
    background: transparent;
    border: 1px solid var(--accent);
    border-radius: 10px;
    color: var(--accent);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.send-code-btn:hover:not(:disabled) {
    background: rgba(99,102,241,0.1);
}

.send-code-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.login-form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    padding: 4px 0;
}

.login-submit-btn {
    padding: 14px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-pink) 100%);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
}

.login-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}

.login-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 登录/注册切换 */
.login-switch {
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.login-switch a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.login-switch a:hover {
    color: var(--accent-pink);
}

.login-modal-form.hidden {
    display: none;
}