/* 全局样式 */
:root {
    /* 主色调 - 使用充满科技感的紫色渐变 */
    --primary-color: #6C5CE7;
    --primary-gradient: linear-gradient(135deg, #6C5CE7 0%, #8E44AD 100%);
    
    /* 背景色 - 深色主题 */
    --background-color: #13111C;
    --surface-color: #1E1B2E;
    
    /* 文本颜色 */
    --text-color: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    
    /* 强调色 */
    --accent-color: #00F5FF;
    --accent-gradient: linear-gradient(135deg, #00F5FF 0%, #8E44AD 100%);
    
    /* 错误状态 */
    --error-color: #FF4444;
    
    /* 成功状态 */
    --success-color: #4CAF50;
    
    /* 边框和分割线 */
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 圆角 */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    
    /* 阴影效果 */
    --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    --box-shadow-hover: 0 12px 32px rgba(108, 92, 231, 0.3);
    
    /* 动画时间 */
    --transition-speed: 0.3s;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 容器布局 */
.container {
    width: 100%;
    max-width: 1200px;
    padding: var(--spacing-lg);
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* 视图切换 */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* 首页样式 */
#home-view {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.logo {
    margin-bottom: var(--spacing-xl);
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: normal;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.input-section {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 40px; /* 增加顶部空间，使整个区域下移 */
}

.input-container {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.input-container:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 245, 255, 0.1);
}

#url-input {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

#url-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color);
}

#url-input::placeholder {
    color: var(--text-secondary-color);
}

.error-message,
.warning-message {
    color: #E6E6E6 !important;
    font-size: 0.6rem !important;
    line-height: 1.2 !important;
    text-align: left !important;
    margin-top: -8px !important;
    margin-left: 16px !important;
    padding-left: 0 !important;
    padding-bottom: 8px !important;
    display: block !important;
    visibility: visible !important;
}

.warning-icon {
    display: none !important;
}

/* 按钮样式 */
.primary-btn {
    background: var(--primary-gradient);
    color: var(--text-color);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
}

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

.primary-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.primary-btn:hover::after {
    transform: translateX(100%);
}

.secondary-btn {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--primary-color);
    padding: 10px 22px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

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

/* 编辑器视图样式 */
#editor-view {
    padding: var(--spacing-md);
}

.editor-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    align-items: flex-start; /* 子元素左对齐 */
}

.preview-section {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.qrcode-preview {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

#qrcode-container {
    width: 250px;
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--surface-color);
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    margin: 0 auto;
}

/* 添加二维码图像样式，确保二维码本身有合适的大小 */
#qrcode-container img {
    width: 70%; /* 控制二维码在容器中的大小 */
    height: 70%;
    display: block;
    object-fit: contain;
}

.edit-section {
    margin-top: var(--spacing-lg);
    width: 100%;
    padding-left: 20px; /* 添加左侧填充，向左移动 */
}

/* 当前选中样式容器 */
.selected-styles-container {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    overflow: hidden !important;
    padding: 0 !important;
    margin: 0 !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

.selected-styles-title {
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
}

.selected-styles-content {
    padding: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.selected-style-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(138, 180, 248, 0.1);
    border-radius: var(--border-radius);
}

.selected-style-icon {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.selected-style-icon img {
    max-width: 100%;
    max-height: 100%;
}

.selected-style-name {
    font-size: 0.85rem;
}

.edit-options {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.edit-option {
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.edit-option:hover {
    background: rgba(108, 92, 231, 0.1);
}

.option-label {
    padding: var(--spacing-md);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.option-label .selected-style {
    width: 24px;
    min-width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.option-label .selected-style-icon {
    width: 100%;
    height: 100%;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--surface-color);
    overflow: hidden;
}

.option-label .selected-style-icon img {
    max-width: 100%;
    max-height: 100%;
}

/* 移除选中样式的文字值显示 */
.option-label .selected-style-value {
    display: none;
}

.option-label span {
    flex: 1;
}

.option-label::after {
    content: '▼';
    font-size: 0.8rem;
    color: var(--text-secondary-color);
    transition: transform 0.3s;
}

.edit-option.expanded .option-label::after {
    transform: rotate(180deg);
}

.option-content {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s, padding 0.3s;
}

.option-content.expanded {
    padding: var(--spacing-md);
    max-height: 500px;
}

/* 色彩选择器样式 */
.color-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s, transform 0.3s;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--text-color);
}

/* Logo选择器样式 */
.logo-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--spacing-sm);
}

.logo-option {
    width: 60px;
    height: 60px;
    background-color: white;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-speed) ease;
    overflow: hidden;
}

.logo-option:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

.logo-option.selected {
    border-color: var(--accent-color);
}

.logo-option img {
    max-width: 80%;
    max-height: 80%;
}

.custom-logo-upload {
    margin-top: var(--spacing-md);
}

.custom-logo-upload input {
    display: none;
}

.custom-logo-upload label {
    display: block;
    background-color: var(--surface-color);
    color: var(--primary-color);
    border: 1px dashed var(--primary-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.custom-logo-upload label:hover {
    background-color: rgba(138, 180, 248, 0.08);
}

/* 码点和码眼样式选择器 */
.style-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--spacing-sm);
}

.style-option {
    width: 60px;
    height: 60px;
    background-color: white;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s, transform 0.3s;
    overflow: hidden;
}

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

.style-option.selected {
    border-color: var(--primary-color);
}

.style-option img {
    max-width: 80%;
    max-height: 80%;
}

/* 底部操作按钮 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.save-message {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--secondary-color);
    min-height: 20px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .editor-container {
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .preview-section, .edit-section {
        width: 100%;
    }
    
    .qrcode-preview {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    #qrcode-container {
        width: 200px;
        height: 200px;
        margin: 0 auto;
    }
    
    .option-content.expanded {
        max-height: 300px;
        overflow-y: auto;
    }
    
    .logo {
        margin-bottom: var(--spacing-lg);
    }
    
    .logo h1 {
        font-size: 2rem;
    }
}

@media (min-width: 768px) {
    .editor-container {
        flex-direction: row;
        align-items: center;
        justify-content: center;
    }

    .preview-section {
        flex: 1;
        max-width: 400px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .edit-section {
        flex: 2;
        margin-top: 0;
        padding-left: 0;
    }
}

/* 添加动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes shine {
    from {
        transform: translateX(-100%) rotate(45deg);
    }
    to {
        transform: translateX(100%) rotate(45deg);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slide-up {
    animation: slideUp 0.6s ease forwards;
}

/* 发光效果 */
.glow-effect {
    position: relative;
    z-index: 1;
}

.glow-effect::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--primary-gradient);
    z-index: -1;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.glow-effect:hover::after {
    opacity: 0.3;
}

/* 按钮光效 */
.btn-shine {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 100%
    );
    transform: translateX(-100%) rotate(45deg);
}

.primary-btn:hover .btn-shine {
    animation: shine 1s ease;
}

/* 输入框边框效果 - 取消发光横线 */
.input-border {
    display: none;
}

/* 标题样式 */
.logo h1 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

/* 输入框样式优化 */
#url-input {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
}

#url-input::placeholder {
    color: var(--text-secondary);
}

/* 错误消息样式 */
.error-message {
    color: var(--error-color);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
    min-height: 20px;
}

/* 保存消息样式 */
.save-message {
    text-align: center;
    margin-top: var(--spacing-md);
    min-height: 24px;
    transition: opacity var(--transition-speed) ease;
}

/* 响应式布局优化 */
@media (min-width: 768px) {
    .editor-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
        align-items: start;
    }
    
    .preview-section {
        position: sticky;
        top: var(--spacing-xl);
    }
}

/* 确保Logo选项中的元素可点击，即使面板折叠 */
.edit-option[data-option="logo"] .option-content.collapsed .logo-option,
.edit-option[data-option="logo"] .option-content.collapsed .logo-delete-btn {
    pointer-events: auto !important;
    visibility: visible !important;
    z-index: 99999 !important;
}

/* 确保在面板折叠状态下自定义Logo仍然能接收点击事件 */
.option-content.collapsed .logo-option.custom {
    z-index: 9999 !important;
    pointer-events: auto !important;
}

/* 调整按钮位置，增加上方间距 */
#generate-btn {
    margin-top: 40px; /* 增加按钮上方的空间 */
}

/* 页头在移动端自然换行，保持导航不会遮挡内容。 */
.site-header {
    width: min(100%, 1200px);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.site-name, .nav-pricing {
    color: var(--text-color);
    font-weight: 650;
    text-decoration: none;
}

.nav-pricing {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
    outline: 2px solid #c5f975;
    outline-offset: 4px;
}

button:disabled { cursor: wait; opacity: .65; }

a:not(.site-name):not(.nav-pricing):not(.primary-btn) { color: #c9d6ff; }
a.primary-btn { text-decoration: none; }

/* 下载票券将套餐说明与结账动作分区，分隔线呼应票券样式。 */
.pricing-page, .policy-page {
    max-width: 920px;
    gap: var(--spacing-lg);
    padding-bottom: clamp(32px, 6vw, 72px);
}

.package-ticket {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    border: 1px solid #4a4662;
    border-radius: 14px;
    background: #211e32;
}

.ticket-details, .ticket-checkout {
    padding: clamp(20px, 4vw, 40px);
}

.ticket-details h1 {
    font-size: clamp(1.65rem, 6vw, 3.25rem);
    line-height: 1.04;
    letter-spacing: -.045em;
    margin: .32em 0;
    text-wrap: balance;
}

.ticket-details h1 span { display: inline-block; }

.ticket-kicker, .ticket-price {
    color: #c5f975;
    font-family: ui-monospace, monospace;
}

.ticket-kicker { font-size: .78rem; letter-spacing: .12em; }
.ticket-details p:not(.ticket-kicker) { color: #ded9ee; }
.ticket-details .package-description { font-size: 1.1rem; margin-bottom: 12px; }

.ticket-checkout {
    border-inline-start: 1px dashed #5b5577;
    display: grid;
    align-content: start;
    gap: 10px;
}

.ticket-price { font-size: 2.7rem; font-weight: 700; line-height: 1.15; }
.ticket-price small { font-size: 1rem; }
.ticket-checkout .primary-btn { background: #c5f975; color: #172006; border: 0; width: 100%; }
/* 不可用按钮使用静止的灰色外观，只有打开结账时使用等待光标。 */
#buy-package:disabled {
    background: #3a374e;
    color: #e4e0ef;
    opacity: 1;
    cursor: default;
    transform: none;
    box-shadow: none;
}
#buy-package[aria-busy="true"] { cursor: wait; }
#buy-package:disabled::after { display: none; }
.checkout-note, #checkout-status { color: #ded9ee; font-size: .9rem; }
.checkout-mode { color: #c5f975; font-size: .9rem; }

/* 模拟入口使用独立区块，弹窗在窄屏允许滚动。 */
.checkout-preview:not([hidden]) {
    display: grid;
    justify-items: start;
    gap: 8px;
    padding: clamp(20px, 4vw, 32px);
    border: 1px dashed #5b5577;
    border-radius: 14px;
}
.checkout-preview h2 { font-size: 1.25rem; }
#demo-dialog {
    margin: auto;
    width: min(30rem, calc(100% - 32px));
    max-height: calc(100% - 32px);
    padding: clamp(20px, 5vw, 32px);
    border: 1px solid #635f7f;
    border-radius: 14px;
    color: var(--text-color);
    background: #211e32;
    overflow: auto;
}
#demo-dialog::backdrop { background: rgb(16 14 25 / 78%); }
.demo-dialog-content, #demo-actions:not([hidden]) { display: grid; gap: 10px; }
#demo-result:empty { margin: 0; }

/* 钱包区单独展示恢复操作，恢复密钥可选中复制。 */
.wallet-panel {
    border: 1px solid #4a4662;
    border-radius: 14px;
    padding: clamp(20px, 4vw, 32px);
    display: grid;
    gap: 12px;
    justify-items: start;
}

.wallet-panel[hidden] { display: none; }

.wallet-panel h2 { font-size: 1.3rem; }
#wallet-balance, .download-balance { color: #ded9ee; font-variant-numeric: tabular-nums; }
.wallet-panel details { width: 100%; }
.wallet-panel summary { width: fit-content; cursor: pointer; text-decoration: underline; }
.wallet-panel form { margin-top: 10px; }
.wallet-panel label { display: block; margin-bottom: 4px; }
.wallet-panel input {
    width: min(100%, 27rem);
    padding: 8px 10px;
    margin-bottom: 8px;
    border: 1px solid #635f7f;
    border-radius: 6px;
    background: #161425;
    color: var(--text-color);
    font-family: ui-monospace, monospace;
}
#restore-form button { display: block; }
.download-balance { text-align: center; }
#save-message { color: #ded9ee; }

@media (max-width: 680px) {
    .package-ticket { grid-template-columns: 1fr; }
    .ticket-checkout { border-inline-start: 0; border-block-start: 1px dashed #5b5577; }
}

/* 政策正文保持清晰的内容层级与阅读宽度。 */
.legal-container {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow);
}

.legal-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
}

.legal-header h1 {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.effective-date {
    color: var(--text-secondary);
    font-style: italic;
}

.legal-content {
    text-align: left;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.legal-content h2 {
    color: var(--accent-color);
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
    font-size: 1.3rem;
}

.legal-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.legal-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.legal-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.legal-content strong {
    color: var(--text-color);
}

.legal-actions {
    text-align: center;
}

/* Footer Styles */
.site-footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) var(--spacing-lg);
    width: 100%;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

/* 页脚联系方式和政策链接在小屏上自动换行。 */
.footer-content p { color: var(--text-secondary); margin-bottom: 8px; }

.legal-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 16px;
}

/* Toast Notification Styles */
.toast {
    position: fixed;
    top: 25%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface-color);
    color: var(--text-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 2px solid var(--accent-color);
    box-shadow: var(--box-shadow-hover);
    z-index: 9999;
    font-weight: 600;
    font-size: 1.1rem;
    opacity: 0;
    animation: toastShow 0.3s ease forwards;
}

@keyframes toastShow {
    to {
        opacity: 1;
    }
}

/* 小屏政策页保留正文边距。 */
@media (max-width: 768px) {
    .legal-container { padding: var(--spacing-lg); }
}

/* 产品介绍部分样式 */
.product-overview-section {
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    width: 100%;
}

.overview-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

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

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-content {
    position: relative;
    z-index: 1;
}

.feature-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.feature-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.package-card {
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1) 0%, rgba(142, 68, 173, 0.1) 100%);
}

.explore-package-btn {
    margin-top: var(--spacing-md);
    width: 100%;
    text-align: center;
}

@media (max-width: 768px) {
    .product-overview-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

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

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

/* 恢复原站页脚的地址、服务时间和版权信息样式。 */
.support-info {
    margin-bottom: var(--spacing-lg);
}

.support-item {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.support-item strong {
    color: var(--text-color);
}

.copyright {
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
}


/* 长地址在小屏自然换行，政策链接保持原有强调色。 */
.support-item { overflow-wrap: anywhere; }
.site-footer .legal-link { color: var(--accent-color); }
.separator { color: var(--text-secondary); }