:root {
    --primary-color: #4a90e2;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --background-color: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --hover-color: #f5f5f5;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
    --container-padding: 16px;
    --section-gap: 20px;
}

[data-theme="dark"] {
    --primary-color: #64b5f6;
    --secondary-color: #90a4ae;
    --success-color: #66bb6a;
    --background-color: #1a1a1a;
    --text-color: #ffffff;
    --border-color: #404040;
    --hover-color: #2d2d2d;
    --shadow-color: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
    padding-bottom: calc(60px + var(--safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
    width: 100%;
    flex: 1;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--section-gap);
    padding: 12px 0;
    position: sticky;
    top: 0;
    background-color: var(--background-color);
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover,
.theme-toggle:active {
    background-color: var(--hover-color);
}

main {
    display: grid;
    gap: var(--section-gap);
    grid-template-columns: 1fr;
}

.input-section,
.output-section {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: all 0.3s;
}

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

.section-header h2 {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 500;
}

.char-count {
    font-size: 0.9rem;
    color: var(--secondary-color);
    padding: 6px 12px;
    background-color: var(--background-color);
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

textarea {
    width: 100%;
    height: 180px;
    padding: 16px;
    border: none;
    resize: none;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    -webkit-overflow-scrolling: touch;
}

textarea:focus {
    outline: none;
}

.options-panel {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    padding: 24px;
    margin-bottom: 24px;
}

.tab-header {
    display: flex;
    border-bottom: 1.5px solid var(--border-color);
    margin-bottom: 20px;
    background: var(--card-bg);
    border-radius: 12px 12px 0 0;
    overflow: hidden;
}

.tab-button {
    flex: 1;
    padding: 16px 24px;
    font-size: 1.1em;
    font-weight: 500;
    color: var(--secondary-color);
    background: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tab-button:hover {
    background: var(--hover-color);
}

.tab-button.active {
    color: var(--primary-color);
    background: var(--card-bg);
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2.5px;
    background: var(--primary-color);
}

.tab-content {
    display: none;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 0 0 12px 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.tab-content.active {
    display: block;
}

.option-group {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    transition: all 0.3s;
}

.option-group:hover {
    box-shadow: 0 4px 12px var(--shadow-color);
}

.option-group h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.option-group h3::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.option-row {
    display: grid;
    gap: 12px;
    margin-bottom: 16px;
}

.option-row:last-child {
    margin-bottom: 0;
}

.option-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--hover-color);
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.option-item:hover {
    background-color: var(--background-color);
    border-color: var(--border-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.option-item label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 0;
    background: none;
    flex: 1;
    font-size: 0.95rem;
}

input[type="radio"],
input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.help-btn {
    width: 24px;
    height: 24px;
    padding: 0;
    border: none;
    background: none;
    color: var(--secondary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    border-radius: 50%;
    position: relative;
}

.help-btn:hover {
    background-color: var(--border-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.help-btn:active {
    transform: scale(0.95);
}

.help-btn svg {
    width: 16px;
    height: 16px;
    transition: all 0.3s;
}

.help-btn:hover svg {
    transform: scale(1.1);
}

.tooltip-content {
    display: none;
    position: fixed;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    font-size: 0.9rem;
    color: var(--text-color);
    box-shadow: 0 8px 24px var(--shadow-color);
    z-index: 1000;
    max-width: 280px;
    width: 90%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    line-height: 1.6;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.tooltip-content.active {
    display: block;
    animation: tooltipFadeIn 0.3s ease;
}

.tooltip-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 999;
    animation: overlayFadeIn 0.3s ease;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

@keyframes overlayFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.success {
    background-color: var(--success-color) !important;
}

/* 移动端适配 */
@media (min-width: 768px) {
    :root {
        --container-padding: 24px;
        --section-gap: 24px;
    }

    html {
        font-size: 18px;
    }

    main {
        grid-template-columns: repeat(2, 1fr);
    }

    .options-panel {
        grid-column: 1 / -1;
    }

    .option-row {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .button-group {
        grid-template-columns: 2fr 1fr;
    }

    textarea {
        height: 240px;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    :root {
        --container-padding: 32px;
        --section-gap: 32px;
    }

    .container {
        padding: var(--container-padding);
    }

    main {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--section-gap);
    }

    .options-panel {
        grid-column: 1 / -1;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--section-gap);
    }

    .option-group {
        margin-bottom: 0;
    }
}

/* 适配刘海屏 */
@supports (padding-top: env(safe-area-inset-top)) {
    .container {
        padding-top: calc(var(--container-padding) + env(safe-area-inset-top));
    }
    
    header {
        padding-top: calc(12px + env(safe-area-inset-top));
    }
}

.button-group {
    display: flex;
    gap: 12px;
    padding: 16px;
    background-color: var(--hover-color);
    border-top: 1px solid var(--border-color);
    justify-content: flex-end;
}

.primary-btn,
.secondary-btn,
.danger-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

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

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

.danger-btn {
    background-color: #dc3545;
    color: white;
}

.primary-btn:hover,
.secondary-btn:hover,
.danger-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.primary-btn:active,
.secondary-btn:active,
.danger-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.primary-btn svg,
.secondary-btn svg,
.danger-btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

.primary-btn:hover svg,
.secondary-btn:hover svg,
.danger-btn:hover svg {
    transform: scale(1.1);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .button-group {
        flex-direction: column;
        padding: 12px;
    }

    .primary-btn,
    .secondary-btn,
    .danger-btn {
        width: 100%;
        justify-content: center;
        padding: 12px 20px;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    .button-group {
        padding: 20px;
    }

    .primary-btn,
    .secondary-btn,
    .danger-btn {
        padding: 12px 24px;
        font-size: 1rem;
    }
}

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.back-to-top:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .back-to-top {
        right: 16px;
        bottom: calc(16px + var(--safe-area-inset-bottom));
        width: 36px;
        height: 36px;
    }

    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* 适配刘海屏 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .back-to-top {
        bottom: calc(20px + env(safe-area-inset-bottom));
    }
}

.home-main {
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 48px;
}

.hero-section {
    text-align: center;
    padding: 48px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #64b5f6 100%);
    border-radius: 24px;
    color: white;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.tools-section {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.features-section {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.main-footer {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: 24px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .home-main {
        gap: 32px;
    }

    .hero-section {
        padding: 32px 20px;
        border-radius: 16px;
    }

    .tools-section,
    .features-section {
        padding: 0 16px;
    }

    .tools-grid,
    .features-grid {
        gap: 16px;
    }

    .main-footer {
        padding: 20px 16px;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    .home-main {
        gap: 64px;
    }

    .hero-section {
        padding: 64px 32px;
    }

    .tools-section,
    .features-section {
        padding: 0 24px;
    }

    .tools-grid,
    .features-grid {
        gap: 32px;
    }

    .main-footer {
        padding: 32px 24px;
    }
}

.header-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.home-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.home-link:hover {
    background-color: var(--hover-color);
}

.home-link svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.home-link:hover svg {
    transform: translateY(-2px);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .header-content {
        gap: 12px;
    }

    .home-link {
        font-size: 1rem;
        padding: 6px 10px;
    }

    .home-link svg {
        width: 18px;
        height: 18px;
    }
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--primary-color);
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: all 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.welcome-section {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 4px 12px var(--shadow-color);
}

.welcome-section h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.welcome-section p {
    color: var(--secondary-color);
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .profile-section {
        gap: 12px;
    }

    .avatar {
        width: 40px;
        height: 40px;
    }

    .welcome-section {
        margin-bottom: 24px;
        padding: 20px;
    }

    .welcome-section h2 {
        font-size: 1.3rem;
    }

    .welcome-section p {
        font-size: 1rem;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    .avatar {
        width: 56px;
        height: 56px;
    }

    .welcome-section {
        margin-bottom: 40px;
        padding: 32px;
    }

    .welcome-section h2 {
        font-size: 1.8rem;
    }

    .welcome-section p {
        font-size: 1.2rem;
    }
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--section-gap);
    padding: 16px 0;
    position: sticky;
    top: 0;
    background-color: var(--background-color);
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin: 0;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-section h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    font-weight: 700;
}

.hero-section p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin: 0;
}

.section-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 32px;
    text-align: center;
    font-weight: 600;
    position: relative;
    padding-bottom: 16px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.tool-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 4px 12px var(--shadow-color);
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-color);
    border-color: var(--primary-color);
}

.tool-icon {
    width: 64px;
    height: 64px;
    background-color: var(--hover-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.tool-card h2 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-weight: 600;
}

.tool-card p {
    font-size: 0.95rem;
    color: var(--secondary-color);
    line-height: 1.6;
    margin: 0;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px 0;
    }

    .tool-card {
        padding: 20px;
    }

    .tool-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 12px;
    }

    .tool-card h2 {
        font-size: 1.1rem;
    }

    .tool-card p {
        font-size: 0.9rem;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 32px;
    }

    .tool-card {
        padding: 32px;
    }

    .tool-icon {
        width: 72px;
        height: 72px;
        margin-bottom: 20px;
    }

    .tool-card h2 {
        font-size: 1.4rem;
    }

    .tool-card p {
        font-size: 1rem;
    }
}

.feature-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background-color: var(--hover-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.feature-card h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin: 0;
    font-weight: 600;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--secondary-color);
    line-height: 1.5;
    margin: 0;
    max-width: 200px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .features-grid {
        gap: 16px;
    }

    .feature-card {
        padding: 20px 16px;
    }

    .feature-icon {
        width: 36px;
        height: 36px;
    }

    .feature-card h4 {
        font-size: 1rem;
    }

    .feature-card p {
        font-size: 0.85rem;
    }
}

/* 大屏幕适配 */
@media (min-width: 1200px) {
    .features-grid {
        gap: 32px;
    }

    .feature-card {
        padding: 32px 24px;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
    }

    .feature-card h4 {
        font-size: 1.2rem;
    }

    .feature-card p {
        font-size: 1rem;
    }
}

.sub-options {
    display: none;
    margin-left: 24px;
    margin-top: 8px;
    padding: 8px;
    border-left: 2px solid var(--border-color);
}

.sub-option-group {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
}

.sub-option-header {
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.sub-option-list {
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sub-option-list label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.sub-option-list label:hover {
    background-color: var(--bg-hover);
}

.sub-option-list input[type="checkbox"] {
    margin: 0;
}

/* 当主选项未选中时的样式 */
#removeNumberSymbols:not(:checked) ~ .sub-options {
    opacity: 0.5;
    pointer-events: none;
}

/* 当部分选中时的样式 */
#removeNumberSymbols:checked ~ .sub-options .sub-option-master:not(:checked) {
    color: var(--text-secondary);
}

.sub-option-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
    position: relative;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    margin-bottom: 4px;
}

.sub-option-item:hover {
    background-color: var(--bg-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.priority-badge {
    display: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    font-size: 12px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    transition: all 0.2s;
    z-index: 1;
}

.sub-option-item.has-priority .priority-badge {
    display: flex;
}

.sub-option-item.has-priority {
    padding-right: 36px;
    background-color: var(--bg-hover);
    border-color: var(--primary-color);
}

.option-text {
    flex: 1;
    font-size: 0.9rem;
    margin-right: 8px;
}

/* 优先级徽章的动画效果 */
@keyframes priorityBadgePop {
    0% {
        transform: translateY(-50%) scale(0);
    }
    50% {
        transform: translateY(-50%) scale(1.2);
    }
    100% {
        transform: translateY(-50%) scale(1);
    }
}

.priority-badge {
    animation: priorityBadgePop 0.3s ease-out;
}

/* 禁用状态的样式 */
.option-item input:disabled + span {
    opacity: 0.5;
    cursor: not-allowed;
}

.option-item input:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.option-item.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.option-item.disabled label {
    cursor: not-allowed;
}

.option-item.disabled .help-btn {
    opacity: 0.5;
    pointer-events: none;
}

.option-item.full-width {
    width: 100%;
}

.option-item.full-width textarea {
    width: 100%;
    min-height: 100px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
}

.option-item.full-width textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color-light);
}

.option-item.full-width .help-btn {
    margin-top: 8px;
    float: right;
}

.option-item.horizontal {
    display: flex;
    align-items: center;
    gap: 10px;
}

.option-item.horizontal .label-group {
    display: flex;
    align-items: center;
    gap: 5px;
    min-width: 120px;
}

.option-item.horizontal .input {
    flex: 1;
    min-width: 100px;
}

@media (max-width: 768px) {
    .option-item.horizontal {
        flex-direction: column;
        align-items: flex-start;
    }
    .option-item.horizontal .input {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .tab-button {
        padding: 12px 16px;
        font-size: 1em;
    }
    
    .tab-content {
        padding: 16px;
    }
}

/* 特殊字符按钮组 */
.special-chars {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.special-char-btn {
    padding: 6px 16px;
    font-size: 1em;
    color: var(--text-color);
    background: #fff;
    border: 1.5px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.special-char-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.special-char-btn:active {
    transform: translateY(1px);
}

@media (max-width: 768px) {
    .special-chars {
        gap: 6px;
    }
    
    .special-char-btn {
        padding: 4px 8px;
        font-size: 0.85em;
    }
}

.precise-inputs {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}
.precise-input-col {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}
.precise-input-col .special-chars,
.precise-input-col .precise-extra-chars {
    margin-bottom: 8px;
}
.precise-input-col textarea {
    flex: 1;
}
@media (max-width: 600px) {
    .precise-inputs {
        flex-direction: column;
        gap: 8px;
    }
}

.precise-extra-chars {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.precise-block {
    display: flex;
    flex-direction: column;
    margin-bottom: 18px;
}
.precise-block-search {
    margin-bottom: 24px;
}
.precise-block textarea {
    min-height: 80px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg, #fff);
    font-size: 14px;
    resize: vertical;
}

.highlight-preview {
    margin-top: 8px;
    padding: 12px;
    min-height: 80px;
    background: #f8fafd;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 1em;
    white-space: pre-wrap;
    word-break: break-all;
}
.highlight-match {
    background: #ffe066;
    color: #d35400;
    border-radius: 3px;
    padding: 0 2px;
}