/* ===== CSS 变量和设计系统 ===== */
:root {
    /* 颜色 */
    --color-bg-primary: #0f0f1a;
    --color-bg-secondary: #1a1a2e;
    --color-bg-card: #16162a;
    --color-bg-hover: #1e1e3a;

    --color-accent-primary: #6366f1;
    --color-accent-secondary: #818cf8;
    --color-accent-glow: rgba(99, 102, 241, 0.3);

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;

    --color-border: #2d2d4a;
    --color-border-focus: #6366f1;

    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--color-accent-glow);

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Menlo, Monaco, 'Courier New', monospace;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(ellipse at top, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 两栏布局 ===== */
.main-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

@media (min-width: 900px) {
    .main-layout {
        flex-direction: row;
        gap: var(--spacing-lg);
    }

    .panel-left {
        flex: 3;
        min-width: 0;
    }

    .panel-right {
        flex: 2;
        min-width: 0;
        max-width: 320px;
    }
}

.panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== 头部 ===== */
.header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo-icon {
    font-size: 2.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* ===== 主内容 ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* ===== 卡片 ===== */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition-normal);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-md);
}

/* ===== 节标题 ===== */
.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.section-title .icon {
    font-size: 1.2rem;
}

/* ===== 输入区域 ===== */
.input-group {
    display: flex;
    gap: var(--spacing-md);
}

/* ===== 添加订阅上传盒 ===== */
.upload-box {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    background: rgba(99, 102, 241, 0.06);
    cursor: pointer;
    transition: var(--transition-fast);
    outline: none;
}

.upload-box:hover,
.upload-box:focus {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
    background: rgba(99, 102, 241, 0.1);
}

.upload-box-inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    justify-content: center;
}

.upload-icon {
    display: inline-flex;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.upload-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: left;
}

.upload-title {
    font-weight: 600;
}

.upload-desc {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* 计数徽标 */
.badge-count {
    margin-left: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 22px;
    padding: 0 var(--spacing-xs);
    border-radius: 999px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: var(--color-success);
    font-size: 0.8rem;
}

/* 订阅列表 */
.subscription-list {
    margin-top: var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.subscription-item {
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.subscription-item.active {
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-md);
}

.subscription-item-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.subscription-item-url {
    white-space: normal;
    overflow: visible;
    text-overflow: initial;
    max-width: none;
    word-break: break-all;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.subscription-item-filename {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.subscription-item-filename-main {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
    cursor: help;
}

.subscription-item-actions {
    display: inline-flex;
    gap: var(--spacing-xs);
}

.subscription-item-stats {
    display: inline-flex;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    flex-wrap: wrap;
}

/* 统计标签样式 */
.stat-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.stat-proxy {
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-accent-secondary);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.stat-group {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.stat-rule {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

@media (max-width: 640px) {
    .subscription-list {
        grid-template-columns: 1fr;
    }
}

.url-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: var(--transition-fast);
}

.url-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 100%);
    color: white;
}

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

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--color-accent-primary);
    border: 1px solid var(--color-accent-primary);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* 加载动画 */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== 错误消息 ===== */
.error-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    color: var(--color-error);
    font-size: 0.9rem;
    animation: shake 0.5s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

/* ===== 内容展示区 ===== */
.content-wrapper {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.config-content {
    padding: var(--spacing-lg);
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 400px;
    overflow-y: auto;
}

.config-content::-webkit-scrollbar {
    width: 8px;
}

.config-content::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

.config-content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.config-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

.content-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ===== 配置选项 ===== */
.options-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.option-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.option-item:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-bg-hover);
}

.option-checkbox {
    display: none;
}

.option-checkmark {
    width: 22px;
    height: 22px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
    margin-top: 2px;
}

.option-checkbox:checked+.option-checkmark {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.option-checkbox:checked+.option-checkmark::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.option-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.option-label {
    font-weight: 500;
    color: var(--color-text-primary);
}

.option-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.sub-option {
    margin-left: var(--spacing-lg);
    border-left: 3px solid var(--color-accent-primary);
    animation: fadeIn 0.3s ease;
}

.option-input-item {
    cursor: default;
}

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

.option-input {
    margin-top: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-family: var(--font-mono);
    transition: var(--transition-fast);
}

.option-item.option-inline .option-content {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-md);
}

.option-item.option-inline .option-label {
    margin-right: var(--spacing-xs);
    white-space: nowrap;
}

.option-item.option-inline .option-desc {
    margin-left: var(--spacing-xs);
}

.option-item.option-inline .option-input {
    margin-top: 0;
    width: 240px;
}

/* 弹层内链接输入框全宽 */
.option-input-item .option-content.full-width .option-input {
    width: 100% !important;
}

@media (max-width: 640px) {
    .option-item.option-inline .option-content {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }

    .option-item.option-inline .option-input {
        width: 100%;
    }
}

.option-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 2px var(--color-accent-glow);
}

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

/* ===== 结果区域 ===== */
.result-wrapper {
    display: flex;
    gap: var(--spacing-md);
}

.result-url {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-accent-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.result-url:focus {
    outline: none;
    border-color: var(--color-border-focus);
}

.preview-section {
    margin-top: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.preview-filename {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    border-radius: var(--radius-sm);
    color: var(--color-success);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    animation: fadeIn 0.3s ease;
}

.preview-filename::before {
    content: '📄';
}

.preview-content {
    margin-top: var(--spacing-lg);
    animation: fadeIn 0.3s ease;
}

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

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

.preview-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ===== 页脚 ===== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* ===== 动画效果 ===== */
.card {
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.content-section,
.options-section,
.result-section {
    animation: fadeIn 0.4s ease;
}

/* ===== 响应式设计 ===== */
@media (max-width: 640px) {
    .container {
        padding: var(--spacing-md);
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .input-group {
        flex-direction: column;
    }

    .result-wrapper {
        flex-direction: column;
    }

    .card {
        padding: var(--spacing-lg);
    }
}

/* ===== 弹层 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    animation: fadeIn 0.25s ease;
    z-index: 1000;
}

.modal-content {
    width: 800px;
    max-width: 90vw;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.modal-title {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.modal-body {
    overflow-y: auto;
    max-height: calc(92vh - 72px);
}

.modal-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.modal-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.modal-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.modal-card-url {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 70%;
}

.modal-card-actions {
    display: inline-flex;
    gap: var(--spacing-xs);
}

.modal-card-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
}

.modal-card-content pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-height: 380px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.modal-card-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.modal-card.error {
    border-color: rgba(239, 68, 68, 0.6);
    background: rgba(239, 68, 68, 0.08);
}

.modal-card.loading {
    border-color: rgba(99, 102, 241, 0.6);
}

@media (max-width: 640px) {
    .modal-content {
        max-height: 80vh;
    }
}

@media (min-width: 900px) {
    .modal-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1200px) {
    .modal-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* ===== 紧凑布局样式 ===== */
.card-compact {
    padding: var(--spacing-md);
}

.section-title-compact {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.upload-box-compact {
    padding: var(--spacing-md);
}

.upload-box-compact .upload-icon {
    width: 24px;
    height: 24px;
    font-size: 0.9rem;
}

.upload-box-compact .upload-title {
    font-size: 0.9rem;
}

.options-list-compact {
    gap: var(--spacing-sm);
}

/* 选项分类样式 */
.option-category {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
}

.option-category-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

.option-category-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-placeholder {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.preview-section-compact {
    margin-top: var(--spacing-md);
}

/* ===== 选项芯片样式 ===== */
.option-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
}

.option-group-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
}

.option-group-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    min-width: 40px;
}

.option-group-stack {
    flex-direction: column;
    align-items: stretch;
}

.option-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.85rem;
    user-select: none;
}

.option-chip:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-bg-hover);
}

.option-chip-check {
    width: 14px;
    height: 14px;
    border: 1.5px solid var(--color-border);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.option-checkbox:checked+.option-chip-check {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.option-checkbox:checked+.option-chip-check::after {
    content: '✓';
    color: white;
    font-size: 10px;
    font-weight: bold;
}

.option-chip-label {
    color: var(--color-text-primary);
    white-space: nowrap;
}

.option-chip-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
}

.option-chip-sm .option-chip-check {
    width: 12px;
    height: 12px;
}

/* ===== 选项输入行样式 ===== */
.option-input-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
}

.option-input-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    min-width: 45px;
}

.option-input-compact {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
    width: auto;
    min-width: 80px;
    max-width: 120px;
    margin-top: 0;
}

/* ===== 小按钮样式 ===== */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.85rem;
}

/* ===== 头部紧凑化 ===== */
.header {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.header h1 {
    font-size: 1.75rem;
}

.logo-icon {
    font-size: 2rem;
}

.subtitle {
    font-size: 0.95rem;
}

/* ===== 移动端响应式调整 ===== */
@media (max-width: 640px) {
    .container {
        padding: var(--spacing-sm);
    }

    .card-compact {
        padding: var(--spacing-sm);
    }

    .section-title-compact {
        font-size: 0.95rem;
        margin-bottom: var(--spacing-sm);
    }

    .option-input-compact {
        min-width: 60px;
        max-width: 100px;
    }

    .option-group-label {
        min-width: auto;
    }

    .result-wrapper {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .result-wrapper .btn-sm {
        width: 100%;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .logo-icon {
        font-size: 1.75rem;
    }
}