/* ColorCraft Components - Enhanced Professional Design */

/* 企业级按钮组件系统 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-family: var(--font-sans);
    font-weight: var(--font-semibold);
    font-size: var(--text-base);
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-md);
    user-select: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

/* 按钮尺寸变体 */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.btn-md {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-base);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

/* 按钮颜色变体 */
.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-secondary {
    background: var(--secondary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline:active {
    transform: translateY(0);
}

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

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

/* 状态变体 */
.btn-success {
    background: var(--success-gradient);
    color: white;
}

.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-2px);
}

.btn-warning {
    background: var(--warning-gradient);
    color: white;
}

.btn-warning:hover {
    background: var(--warning-hover);
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--danger-gradient);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-hover);
    transform: translateY(-2px);
}

.btn-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* 图标按钮 */
.btn-icon {
    padding: var(--spacing-3);
    min-width: auto;
}

.btn-icon.btn-sm {
    padding: var(--spacing-2);
}

.btn-icon.btn-lg {
    padding: var(--spacing-4);
}

/* 块级按钮 */
.btn-block {
    width: 100%;
    display: flex;
}

/* 加载状态 */
.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

/* 现代化通知和警报组件 */
.alert {
    position: relative;
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
    border: 1px solid transparent;
}

.alert-primary {
    color: var(--primary-color);
    background-color: var(--primary-light);
    border-color: var(--primary-color);
}

.alert-success {
    color: var(--success-color);
    background-color: var(--success-light);
    border-color: var(--success-color);
}

.alert-warning {
    color: var(--warning-color);
    background-color: var(--warning-light);
    border-color: var(--warning-color);
}

.alert-danger {
    color: var(--danger-color);
    background-color: var(--danger-light);
    border-color: var(--danger-color);
}

.alert-icon {
    margin-right: var(--spacing-3);
    font-size: 1.25rem;
    vertical-align: middle;
}

/* 进度条组件 */
.progress {
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-4);
}

.progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.progress-bar.success {
    background: var(--success-gradient);
}

.progress-bar.warning {
    background: var(--warning-gradient);
}

/* 徽章组件 */
.badge {
    display: inline-block;
    padding: 0.25em 0.75em;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--radius-full);
}

.badge-primary {
    color: white;
    background: var(--primary-gradient);
}

.badge-secondary {
    color: white;
    background: var(--secondary-gradient);
}

.badge-success {
    color: white;
    background: var(--success-gradient);
}

.badge-warning {
    color: white;
    background: var(--warning-gradient);
}

.badge-danger {
    color: white;
    background: var(--danger-gradient);
}

/* 分隔线组件 */
.divider-vertical {
    width: 1px;
    height: 100%;
    background: var(--border-color);
    margin: 0 var(--spacing-4);
}

/* 工具提示组件 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: var(--text-primary);
    color: white;
    text-align: center;
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    position: absolute;
    z-index: var(--z-tooltip);
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: var(--text-xs);
    line-height: 1.4;
}

.tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--text-primary) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 企业级表单组件系统 */
.form-group {
    margin-bottom: var(--spacing-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-md);
    box-shadow: var(--shadow-xs);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    background-color: var(--bg-primary);
}

.form-input:hover:not(:focus) {
    border-color: var(--border-medium);
}

.form-input:disabled {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

/* 文本域样式 */
.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* 选择框样式 */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* 复选框和单选框 */
.form-checkbox,
.form-radio {
    width: 16px;
    height: 16px;
    margin-right: var(--spacing-2);
    accent-color: var(--primary-color);
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-3);
}

.form-check-label {
    font-size: var(--text-base);
    color: var(--text-secondary);
    cursor: pointer;
}

/* 表单验证状态 */
.form-input.is-valid {
    border-color: var(--success-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2310b981' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.form-input.is-invalid {
    border-color: var(--danger-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23ef4444'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23ef4444' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

/* 表单帮助文本 */
.form-help {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--spacing-2);
}

.form-error {
    display: block;
    font-size: var(--text-sm);
    color: var(--danger-color);
    margin-top: var(--spacing-2);
}

/* 内联表单 */
.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    align-items: center;
}

.form-inline .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

/* 搜索表单 */
.search-form {
    position: relative;
    display: flex;
}

.search-input {
    padding-left: var(--spacing-10);
    padding-right: var(--spacing-4);
}

.search-icon {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* 订阅表单优化 */
.subscribe-form {
    display: flex;
    gap: var(--spacing-3);
    max-width: 500px;
    margin: 0 auto;
}

.subscribe-input {
    flex: 1;
    min-width: 0;
}

.subscribe-button {
    flex-shrink: 0;
}
/* 企业级卡片组件系统 */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-lg);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-img {
    width: 100%;
    height: auto;
    display: block;
}

.card-img-top {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-top-left-radius: calc(var(--radius-xl) - 1px);
    border-top-right-radius: calc(var(--radius-xl) - 1px);
}

.card-body {
    flex: 1 1 auto;
    padding: var(--spacing-6);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-3);
    line-height: var(--leading-tight);
}

.card-subtitle {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
}

.card-text {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-4);
}

.card-actions {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-6);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-header {
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-header-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin: 0;
}

.card-footer {
    padding: var(--spacing-5) var(--spacing-6);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

/* 卡片变体 */
.card-primary {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.card-primary .card-header {
    background: var(--primary-gradient);
    color: white;
    border: none;
}

.card-primary .card-header-title {
    color: white;
}

.card-success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 1px var(--success-color);
}

.card-warning {
    border-color: var(--warning-color);
    box-shadow: 0 0 0 1px var(--warning-color);
}

.card-danger {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 1px var(--danger-color);
}

/* 特色卡片 */
.feature-card {
    text-align: center;
    padding: var(--spacing-8);
    transition: var(--transition-lg);
}

.feature-card:hover {
    transform: translateY(-8px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-4);
    background: var(--primary-gradient);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.feature-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-3);
}

.feature-description {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

/* 工具卡片 */
.tool-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.tool-card .card-body {
    flex: 1;
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-4);
    color: var(--primary-color);
}

.tool-name {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.tool-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
    flex: 1;
}

.color-preview {
    position: relative;
    width: 400px;
    height: 400px;
}

.color-wheel {
    position: relative;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    margin: 0 auto;
    animation: rotate 20s linear infinite;
    box-shadow: var(--shadow-xl);
    background: conic-gradient(
        #ff6b6b, #ff8e8e, #ffb1b1,
        #4ecdc4, #6ee0d8, #8ef3ec,
        #45b7d1, #6ac7db, #8fd8e5,
        #96ceb4, #aedecc, #c6f0e4,
        #feca57, #fed77a, #fee49d
    );
    border: 8px solid var(--bg-elevated);
}

.color-segment {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-gradient);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-md);
    border: 3px solid var(--bg-elevated);
}

.color-segment:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.color-segment:nth-child(2) { top: 15%; right: 15%; }
.color-segment:nth-child(3) { top: 50%; right: 0; transform: translateY(-50%); }
.color-segment:nth-child(4) { bottom: 15%; right: 15%; }
.color-segment:nth-child(5) { bottom: 0; left: 50%; transform: translateX(-50%); }
.color-segment:nth-child(6) { bottom: 15%; left: 15%; }
.color-segment:nth-child(7) { top: 50%; left: 0; transform: translateY(-50%); }
.color-segment:nth-child(8) { top: 15%; left: 15%; }

.color-segment:hover {
    transform: scale(1.3) translateY(-5px);
    z-index: 10;
    box-shadow: var(--shadow-xl);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.color-info {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    min-width: 200px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.color-display {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.current-color {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--primary-gradient);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.color-values {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.color-hex, .color-rgb {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.color-hex {
    font-weight: 600;
    color: var(--text-primary);
}

/* Enhanced Tools Showcase Section */
.tools-showcase {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
    isolation: isolate;
}

.tools-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 107, 107, 0.03) 0%, transparent 25%),
        radial-gradient(circle at 90% 80%, rgba(78, 205, 196, 0.03) 0%, transparent 25%);
    pointer-events: none;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.tool-item {
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-lg);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    box-shadow: var(--shadow-md);
}

.tool-item:nth-child(1) { animation-delay: 0.1s; }
.tool-item:nth-child(2) { animation-delay: 0.2s; }
.tool-item:nth-child(3) { animation-delay: 0.3s; }
.tool-item:nth-child(4) { animation-delay: 0.4s; }
.tool-item:nth-child(5) { animation-delay: 0.5s; }
.tool-item:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-lg);
}

.tool-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--border-medium);
}

.tool-item:hover::before {
    opacity: 1;
}

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

.tool-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-lg);
    position: relative;
    overflow: hidden;
}

.tool-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: var(--transition-lg);
}

.tool-item:hover .tool-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.tool-item:hover .tool-icon::before {
    animation: shine 0.8s ease;
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tool-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.tool-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-md);
}

.stat-item:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.stat-item i {
    color: var(--primary-color);
}

.tool-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.tool-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-lg);
}

.tool-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.tool-button:hover::before {
    left: 100%;
}

.tool-button:active {
    transform: translateY(-1px);
}

.tool-button:focus {
    outline: none;
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(255, 107, 107, 0.3);
}

/* Tool Modal */
.tool-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.tool-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-container {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 1000px;
    max-height: 90vh;
    overflow: hidden;
    position: relative;
    z-index: 1;
    border: 1px solid var(--border-color);
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-normal);
}

.tool-modal.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.modal-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-help,
.modal-close {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-elevated);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.modal-help:hover {
    background: var(--primary-gradient);
    color: white;
}

.modal-close:hover {
    background: var(--error-color);
    color: white;
}

.modal-content {
    padding: 2rem;
    max-height: calc(90vh - 100px);
    overflow-y: auto;
}

/* Help Tooltip */
.help-tooltip {
    position: fixed;
    top: 50%;
    right: 2rem;
    transform: translateY(-50%);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 1.5rem;
    z-index: 2001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    max-width: 280px;
}

.help-tooltip.show {
    opacity: 1;
    visibility: visible;
}

.help-content h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.shortcut-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.shortcut-item kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.shortcut-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex: 1;
    text-align: right;
}

/* Features Section */
.features-section {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="feature-dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="%234ecdc4" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23feature-dots)"/></svg>');
    pointer-events: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-item {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.feature-item:nth-child(1) { animation-delay: 0.1s; }
.feature-item:nth-child(2) { animation-delay: 0.2s; }
.feature-item:nth-child(3) { animation-delay: 0.3s; }
.feature-item:nth-child(4) { animation-delay: 0.4s; }
.feature-item:nth-child(5) { animation-delay: 0.5s; }
.feature-item:nth-child(6) { animation-delay: 0.6s; }
.feature-item:nth-child(7) { animation-delay: 0.7s; }
.feature-item:nth-child(8) { animation-delay: 0.8s; }
.feature-item:nth-child(9) { animation-delay: 0.9s; }

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
    box-shadow: var(--shadow-lg);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Call to Action Section */
.cta-section {
    padding: 6rem 0;
    background: var(--primary-gradient);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="cta-pattern" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="2" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23cta-pattern)"/></svg>');
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 更新现有的CTA按钮样式以匹配新组件系统 */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-family: var(--font-sans);
    font-weight: var(--font-semibold);
    font-size: var(--text-base);
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-md);
    user-select: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-3) var(--spacing-6);
}

.cta-button.primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.cta-button.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.cta-button.secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.cta-button.secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cta-button.secondary:active {
    transform: translateY(0);
}

/* Modern Footer Design */
.site-footer {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 3rem;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 107, 107, 0.05) 0%, transparent 30%),
        radial-gradient(circle at 90% 80%, rgba(78, 205, 196, 0.05) 0%, transparent 30%);
    pointer-events: none;
}

.footer-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section {
    display: flex;
    flex-direction: column;
}

/* Enhanced Brand Section */
.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-brand .brand-logo {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-md);
    flex-shrink: 0;
}

.footer-brand .brand-logo:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.footer-brand .brand-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-brand .brand-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand .brand-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.footer-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    max-width: 350px;
}

/* Enhanced Section Titles */
.footer-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

/* Enhanced Links */
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-md);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    position: relative;
}

.footer-links a::before {
    content: '';
    position: absolute;
    left: -10px;
    width: 0;
    height: 1px;
    background: var(--primary-gradient);
    transition: var(--transition-md);
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-links a:hover::before {
    width: 8px;
}

/* Contact Section */
.footer-contact {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    transition: var(--transition-md);
}

.contact-item:hover {
    transform: translateX(5px);
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.1rem;
    min-width: 20px;
}

/* Social Media Section */
.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--bg-elevated);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateY(-5px) scale(1.1);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

/* Newsletter Form Enhancements */
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
    position: relative;
}

.newsletter-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-elevated);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition-md);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.newsletter-input::placeholder {
    color: var(--text-muted);
}

.newsletter-button {
    padding: 0.75rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.newsletter-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.newsletter-button:disabled {
    cursor: not-allowed;
    transform: scale(0.95);
}

.newsletter-button::-moz-focus-inner {
    border: 0;
}

/* Success Message Animation */
.newsletter-success {
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    background: var(--success-gradient);
    color: white;
    padding: 1rem;
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.newsletter-success.show {
    opacity: 1;
    transform: translateY(0);
}

/* Confetti Animation Keyframes */
@keyframes confetti-fall {
    0% {
        transform: translateY(-20px) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* Shake Animation for Errors */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Loading Spinner Animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spinner {
    animation: spin 1s linear infinite;
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-meta-links {
    display: flex;
    gap: 1.5rem;
}

.footer-meta-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-md);
}

.footer-meta-links a:hover {
    color: var(--primary-color);
}

/* Responsive Components */
@media (max-width: 768px) {
    .hero-visual {
        margin-top: 1.5rem;
    }

    .color-preview {
        width: 280px;
        height: 280px;
    }

    .color-wheel {
        width: 180px;
        height: 180px;
    }

    .color-segment {
        width: 32px;
        height: 32px;
    }

    .color-info {
        min-width: 180px;
        padding: 1rem;
    }

    .tools-showcase {
        padding: 4rem 0;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .tool-item {
        padding: 1.5rem;
    }

    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .tool-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .tool-name {
        font-size: 1.125rem;
    }

    .tool-desc {
        font-size: 0.9rem;
    }

    .tool-button {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
        padding: 0 1rem;
    }

    .modal-container {
        margin: 0.5rem;
        max-width: calc(100% - 1rem);
        max-height: 95vh;
    }

    .modal-header {
        padding: 1rem 1.25rem;
    }

    .modal-title {
        font-size: 1.25rem;
    }

    .modal-content {
        padding: 1.25rem;
        max-height: calc(95vh - 80px);
    }

    .features-section {
        padding: 4rem 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-item {
        padding: 1.5rem;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .feature-title {
        font-size: 1.125rem;
    }

    .feature-desc {
        font-size: 0.9rem;
    }

    .cta-section {
        padding: 4rem 0;
    }

    .cta-title {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }

    .cta-description {
        font-size: 1rem;
        margin-bottom: 1.5rem;
        padding: 0 1rem;
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .cta-actions .cta-button {
        width: 100%;
        max-width: 280px;
    }

    .site-footer {
        padding: 3rem 0 2rem;
    }

    .footer-container {
        padding: 0 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        text-align: center;
        margin-bottom: 2rem;
    }

    .footer-brand {
        justify-content: center;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-brand .brand-text {
        align-items: center;
    }

    .footer-desc {
        text-align: center;
        max-width: 100%;
    }

    .footer-social {
        justify-content: center;
        margin-top: 1.5rem;
    }

    .footer-title {
        text-align: center;
    }

    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
        padding-top: 2rem;
    }

    .footer-meta-links {
        justify-content: center;
        gap: 1rem;
    }

    .newsletter-form {
        max-width: 300px;
        margin: 1.5rem auto 0;
    }
}

/* Extra small screens for components */
@media (max-width: 480px) {
    .color-preview {
        width: 240px;
        height: 240px;
    }

    .color-wheel {
        width: 150px;
        height: 150px;
    }

    .color-segment {
        width: 28px;
        height: 28px;
    }

    .color-info {
        min-width: 160px;
        padding: 0.75rem;
    }

    .tool-item {
        padding: 1.25rem;
    }

    .tool-icon {
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }

    .tool-name {
        font-size: 1rem;
    }

    .tool-desc {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    .tool-button {
        padding: 0.75rem 1rem;
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 0.9rem;
        padding: 0 0.5rem;
    }

    .modal-container {
        margin: 0.25rem;
        max-width: calc(100% - 0.5rem);
    }

    .modal-header {
        padding: 0.75rem 1rem;
    }

    .modal-title {
        font-size: 1.125rem;
    }

    .modal-content {
        padding: 1rem;
    }

    .feature-item {
        padding: 1.25rem;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .feature-title {
        font-size: 1rem;
    }

    .feature-desc {
        font-size: 0.85rem;
    }

    .cta-title {
        font-size: 1.75rem;
    }

    .cta-description {
        font-size: 0.9rem;
        padding: 0 0.5rem;
    }

    .footer-container {
        padding: 0 1rem;
    }

    .footer-content {
        gap: 2rem;
    }

    .footer-brand .brand-logo {
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }

    .footer-brand .brand-title {
        font-size: 1.3rem;
    }

    .footer-desc {
        font-size: 0.9rem;
    }

    .footer-title {
        font-size: 1.1rem;
    }

    .footer-links a {
        font-size: 0.9rem;
    }

    .footer-contact {
        font-size: 0.9rem;
    }

    .social-link {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }

    .newsletter-input,
    .newsletter-button {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .footer-copyright,
    .footer-meta-links a {
        font-size: 0.85rem;
    }

    .footer-meta-links {
        gap: 0.75rem;
        flex-wrap: wrap;
    }
}