/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 温暖奶油橙色调配色 */
    --primary-bg: #FFFBF5;
    --accent-color: #FF9F43;
    --accent-hover: #FF8C42;
    --accent-light: #FFB366;
    --accent-secondary: #FFD93D;
    --text-primary: #5D4E37;
    --text-secondary: #7D6B5D;
    --text-muted: #A89B8C;
    --card-bg: #FFFCF8;
    --neutral-bg: #FFF8F0;
    --border-color: #FFE8D6;
    --success-color: #A8E6CF;
    --shadow: 0 8px 32px rgba(255, 159, 67, 0.15);
    --shadow-hover: 0 12px 40px rgba(255, 159, 67, 0.25);
    --gradient-bg: linear-gradient(135deg, #FFFBF5 0%, #FFF0E0 50%, #FFE8D0 100%);
    --gradient-accent: linear-gradient(135deg, #FF9F43 0%, #FFB366 100%);
    --gradient-product: linear-gradient(135deg, #FF8C42 0%, #FFD93D 100%);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--gradient-bg);
    min-height: 100vh;
    color: var(--text-secondary);
    line-height: 1.6;
    transition: all 0.5s ease;
}

/* 导航栏 - 圆润风格 */
.navbar {
    background: rgba(255, 252, 248, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(255, 154, 139, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-radius: 0 0 24px 24px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-color);
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 20px;
}

.nav-link:hover {
    color: var(--accent-color);
    background: rgba(255, 159, 67, 0.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
    border-radius: 3px;
}

.nav-link:hover::after {
    width: 60%;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 15px rgba(255, 159, 67, 0.3);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 6px 20px rgba(255, 159, 67, 0.5);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* 注册登录按钮 */
.auth-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.auth-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid var(--accent-color);
}

.register-btn {
    background: transparent;
    color: var(--accent-color);
}

.register-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 159, 67, 0.3);
}

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

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 159, 67, 0.4);
}

/* 夜晚模式样式 */
body.dark-mode {
    --primary-bg: #1A1A2E;
    --accent-color: #FF9F43;
    --accent-hover: #FFB366;
    --accent-light: #FF8C42;
    --text-primary: #E8E8E8;
    --text-secondary: #B8B8B8;
    --text-muted: #888888;
    --card-bg: #16213E;
    --neutral-bg: #0F3460;
    --border-color: #2D3561;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
    --gradient-bg: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
    --gradient-accent: linear-gradient(135deg, #FF9F43 0%, #FF8C42 100%);
    --gradient-product: linear-gradient(135deg, #FF8C42 0%, #FFD93D 100%);
    background: var(--gradient-bg);
    color: var(--text-secondary);
}

body.dark-mode .navbar {
    background: rgba(22, 33, 62, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

body.dark-mode .nav-link:hover {
    background: rgba(255, 159, 67, 0.15);
}

body.dark-mode .upload-area {
    background: rgba(15, 52, 96, 0.5);
    border-color: var(--border-color);
}

body.dark-mode .upload-area:hover {
    background: rgba(255, 159, 67, 0.1);
    border-color: var(--accent-light);
}

body.dark-mode .bg-option,
body.dark-mode .scene-option {
    background: rgba(22, 33, 62, 0.5);
}

body.dark-mode .bg-option:hover,
body.dark-mode .scene-option:hover {
    background: rgba(255, 159, 67, 0.15);
}

body.dark-mode .scene-option i {
    background: rgba(15, 52, 96, 0.8);
    border-color: var(--border-color);
}

body.dark-mode .result-card {
    background: rgba(15, 52, 96, 0.5);
}

body.dark-mode .delete-btn {
    background: rgba(22, 33, 62, 0.8);
    border-color: var(--border-color);
}

body.dark-mode .footer {
    background: rgba(22, 33, 62, 0.9);
}

body.dark-mode .loading-overlay {
    background: rgba(22, 33, 62, 0.95);
}

body.dark-mode .theme-toggle {
    background: linear-gradient(135deg, #4A5568 0%, #2D3748 100%);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

body.dark-mode .theme-toggle:hover {
    box-shadow: 0 6px 20px rgba(255, 159, 67, 0.4);
}

/* 主内容区 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
}

/* Hero区域 - 温暖治愈 */
.hero {
    text-align: center;
    padding: 1.5rem 0 1rem;
}

.hero-content h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.hero-content p {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 300;
}

/* 功能区 */
.tools-section {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
    .tools-section {
        grid-template-columns: 1fr;
    }
}

/* 工具卡片 - 超圆润 */
.tool-card {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid var(--border-color);
}

.tool-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-light);
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

/* 工具图标 - 圆润可爱 */
.tool-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-accent);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: 0 4px 15px rgba(255, 154, 139, 0.3);
}

.product-icon {
    background: var(--gradient-product);
    box-shadow: 0 4px 15px rgba(255, 180, 162, 0.3);
}

.tool-title h2 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

.tool-title p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* 上传区域 - 柔和圆润 */
.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 24px;
    padding: 1.25rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s ease;
    background: var(--neutral-bg);
    position: relative;
    overflow: hidden;
    min-height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--accent-light);
    background: rgba(255, 159, 67, 0.05);
    transform: scale(1.02);
}

.upload-area.dragover {
    border-color: var(--accent-color);
    background: rgba(255, 159, 67, 0.1);
    transform: scale(1.03);
}

.upload-placeholder i {
    font-size: 2.5rem;
    color: var(--accent-light);
    margin-bottom: 0.75rem;
    transition: transform 0.3s ease;
}

.upload-area:hover .upload-placeholder i {
    transform: scale(1.1) rotate(5deg);
}

.upload-placeholder p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.upload-placeholder span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.preview-container {
    position: relative;
    width: 100%;
    max-width: 220px;
}

.preview-container img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* 删除按钮 - 圆润 */
.remove-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 28px;
    height: 28px;
    background: #FF9F43;
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 0.75rem;
    box-shadow: 0 4px 10px rgba(255, 159, 67, 0.4);
}

.remove-btn:hover {
    transform: scale(1.15);
    background: #FF8C42;
}

/* 选项区域 - 柔和 */
.options-section {
    margin-top: 1rem;
}

.options-section h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.bg-options, .scene-options {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.bg-option, .scene-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    padding: 0.6rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.5);
}

.bg-option:hover, .scene-option:hover {
    background: rgba(255, 159, 67, 0.1);
    transform: translateY(-3px);
}

.bg-option.active, .scene-option.active {
    border-color: var(--accent-color);
    background: rgba(255, 159, 67, 0.15);
    box-shadow: 0 4px 15px rgba(255, 159, 67, 0.2);
}

/* 背景预览框 - 超圆润 */
.bg-preview-box {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s ease;
}

.bg-option:hover .bg-preview-box,
.bg-option.active .bg-preview-box {
    border-color: var(--accent-light);
    transform: scale(1.05);
}

.bg-preview-box i {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.bg-option span, .scene-option span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.scene-option {
    min-width: 72px;
}

.scene-option i {
    width: 56px;
    height: 56px;
    background: var(--neutral-bg);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--accent-color);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.scene-option:hover i {
    transform: scale(1.05);
}

.scene-option.active i {
    background: var(--gradient-accent);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(255, 159, 67, 0.4);
}

/* 生成按钮 - 圆润可爱 */
.generate-btn {
    width: 100%;
    margin-top: 1.25rem;
    padding: 0.9rem 1.5rem;
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    box-shadow: 0 6px 20px rgba(255, 159, 67, 0.3);
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(255, 159, 67, 0.5);
}

.generate-btn:active:not(:disabled) {
    transform: translateY(-1px) scale(0.98);
}

.generate-btn:disabled {
    background: linear-gradient(135deg, #E0E0E0 0%, #F0F0F0 100%);
    cursor: not-allowed;
    opacity: 0.7;
    box-shadow: none;
}

.product-btn {
    background: var(--gradient-product);
    box-shadow: 0 6px 20px rgba(255, 140, 66, 0.3);
}

.product-btn:hover:not(:disabled) {
    box-shadow: 0 10px 30px rgba(255, 140, 66, 0.5);
}

/* 结果展示区 - 柔和 */
.results-section {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-top: 1.5rem;
    border: 2px solid var(--border-color);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.results-header h2 {
    color: var(--text-primary);
    font-size: 1.25rem;
}

.clear-all-btn {
    padding: 0.6rem 1rem;
    background: rgba(255, 159, 67, 0.1);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

.clear-all-btn:hover {
    border-color: #FF9F43;
    color: #FF9F43;
    background: rgba(255, 159, 67, 0.15);
    transform: translateY(-2px);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

/* 结果卡片 - 超圆润 */
.result-card {
    background: var(--neutral-bg);
    border-radius: 24px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
}

.result-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
}

.result-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 24px 24px 0 0;
}

.result-info {
    padding: 1rem;
}

.result-info h4 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.result-info p {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-bottom: 0.75rem;
}

.result-actions {
    display: flex;
    gap: 0.5rem;
}

/* 下载和删除按钮 - 圆润 */
.download-btn, .delete-btn {
    flex: 1;
    padding: 0.6rem;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.download-btn {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 159, 67, 0.3);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(255, 159, 67, 0.4);
}

.delete-btn {
    background: var(--neutral-bg);
    color: var(--text-muted);
    border: 2px solid var(--border-color);
}

.delete-btn:hover {
    background: #FF9F43;
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

/* 加载遮罩 - 柔和 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 252, 248, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.loading-spinner p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.loading-spinner span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 底部 - 温暖 */
.footer {
    background: rgba(255, 252, 248, 0.9);
    border-top: 2px solid var(--border-color);
    padding: 1.5rem;
    margin-top: 3rem;
    border-radius: 24px 24px 0 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-muted);
}

.footer-content p:first-child {
    margin-bottom: 0.5rem;
}

.footer-content p:last-child {
    font-size: 0.85rem;
}

.footer-content .icp {
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.8;
    margin-top: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

    .main-content {
        padding: 0.75rem;
    }

    .tool-card {
        padding: 1.25rem;
        border-radius: 24px;
    }

    .upload-area {
        padding: 1rem;
        min-height: 120px;
        border-radius: 20px;
    }

    .bg-options, .scene-options {
        gap: 0.5rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .results-section {
        border-radius: 24px;
        padding: 1.25rem;
    }
}

/* 注册登录弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-hover);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

.close-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--neutral-bg);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: rotate(90deg);
}

/* 注册登录切换 */
.auth-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    background: var(--neutral-bg);
    padding: 0.25rem;
    border-radius: 12px;
}

.auth-tab {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-tab.active {
    background: var(--card-bg);
    color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(255, 159, 67, 0.1);
}

/* 注册登录表单 */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

/* 注册登录方式 */
.register-methods,
.login-methods {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.method-btn {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.method-btn.active {
    border-color: var(--accent-color);
    background: rgba(255, 159, 67, 0.1);
    color: var(--accent-color);
}

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

/* 微信注册登录 */
.wechat-register,
.wechat-login {
    display: block;
}

.phone-register,
.phone-login {
    display: none;
}

.wechat-qr {
    text-align: center;
    padding: 2rem;
    background: var(--neutral-bg);
    border-radius: 20px;
}

.wechat-qr i {
    font-size: 3rem;
    color: #07C160;
    margin-bottom: 1rem;
}

.wechat-qr p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.qr-placeholder i {
    font-size: 4rem;
    color: var(--text-muted);
}

/* 表单组 */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 159, 67, 0.1);
}

/* 验证码输入 */
.code-input {
    display: flex;
    gap: 0.75rem;
}

.code-input input {
    flex: 1;
}

.send-code-btn {
    padding: 0.875rem 1rem;
    border: none;
    background: var(--gradient-accent);
    color: white;
    border-radius: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.send-code-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 159, 67, 0.3);
}

.send-code-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* 提交按钮 */
.submit-btn {
    width: 100%;
    padding: 1rem;
    border: none;
    background: var(--gradient-accent);
    color: white;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 159, 67, 0.4);
}

/* 注册福利 */
.register-benefits {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--neutral-bg);
    border-radius: 16px;
}

.register-benefits h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.register-benefits h3 i {
    color: var(--accent-color);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--text-secondary);
}

.benefit-item i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

/* 忘记密码 */
.forgot-password {
    text-align: center;
    margin-top: 1rem;
}

.forgot-password a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.forgot-password a:hover {
    text-decoration: underline;
}

/* 注册链接 */
.register-link {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.register-link span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.register-link a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    margin-left: 0.25rem;
}

.register-link a:hover {
    text-decoration: underline;
}

/* 登录链接 */
.login-link {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.login-link span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.login-link a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    margin-left: 0.25rem;
}

.login-link a:hover {
    text-decoration: underline;
}

/* 夜晚模式适配 */
body.dark-mode .modal-content {
    background: rgba(22, 33, 62, 0.95);
}

body.dark-mode .modal-header h2 {
    color: var(--text-primary);
}

body.dark-mode .close-btn {
    background: rgba(15, 52, 96, 0.8);
}

body.dark-mode .close-btn:hover {
    background: var(--accent-color);
}

body.dark-mode .auth-tabs {
    background: rgba(15, 52, 96, 0.5);
}

body.dark-mode .auth-tab.active {
    background: rgba(22, 33, 62, 0.8);
}

body.dark-mode .method-btn {
    background: rgba(22, 33, 62, 0.5);
    border-color: var(--border-color);
}

body.dark-mode .method-btn.active {
    background: rgba(255, 159, 67, 0.15);
}

body.dark-mode .wechat-qr {
    background: rgba(15, 52, 96, 0.5);
}

body.dark-mode .qr-placeholder {
    background: rgba(22, 33, 62, 0.8);
    border-color: var(--border-color);
}

body.dark-mode .form-group input {
    background: rgba(22, 33, 62, 0.8);
    border-color: var(--border-color);
}

body.dark-mode .register-benefits {
    background: rgba(15, 52, 96, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        padding: 1.5rem;
        border-radius: 24px;
    }
    
    .modal-header h2 {
        font-size: 1.25rem;
    }
    
    .register-methods,
    .login-methods {
        flex-direction: column;
    }
    
    .method-btn {
        padding: 0.625rem;
    }
    
    .wechat-qr {
        padding: 1.5rem;
    }
    
    .qr-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .qr-placeholder i {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .logo span {
        display: none;
    }

    .hero {
        padding: 1rem 0;
    }

    .tool-header {
        flex-direction: column;
        text-align: center;
    }

    .options-section h3 {
        text-align: center;
    }

    .bg-options, .scene-options {
        justify-content: center;
    }

    .tool-card {
        border-radius: 20px;
    }
}