/* 功能卡片网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 24px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 24px;
}

/* 不同卡片的图标背景色 */
.card.write .card-icon { background: #eff6ff; color: var(--primary); }
.card.check .card-icon { background: #f0fdf4; color: #16a34a; }
.card.reduce .card-icon { background: #faf5ff; color: #9333ea; }

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

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 表格样式 */
.table-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.table-header {
    background: #f9fafb;
    border-bottom: 1px solid var(--border-light);
}
.table-row {
    display: flex;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-light);
    font-size: 14px;
}
.table-row:last-child { border-bottom: none; }
.table-cell {
    flex: 1;
    color: var(--text-secondary);
}
.table-cell:first-child {
    flex: 2;
    color: var(--text-main);
    font-weight: 500;
}
.badge {
    padding: 4px 8px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef9c3; color: #854d0e; }


/* ===== 变量定义 - 与首页风格统一 ===== */
:root {
    /* 主色系 - 学术蓝 */
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-primary-light: #eef2ff;

    /* 辅助色 */
    --color-success: #06d6a0;
    --color-warning: #ffd166;
    --color-danger: #ef476f;

    /* 中性色 */
    --color-text: #1f2937;
    --color-text-secondary: #6b7280;
    --color-bg: #f8fafc;
    --color-border: #e2e8f0;
    --color-white: #ffffff;

    /* 圆角 & 阴影 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(67,97,238,0.15);

    /* 间距 & 动效 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 模块容器 ===== */
.hero-value {
    background: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
}

/* ===== 网格布局 - 响应式 ===== */
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== 卡片样式 ===== */
.value-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.value-card:hover::before {
    transform: scaleX(1);
}

/* ===== 图标区域 ===== */
.value-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition);
}

.value-icon.efficient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}
.value-icon.secure {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: #fff;
}
.value-icon.official {
    background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
    color: #fff;
}
.value-icon.affordable {
    background: linear-gradient(135deg, #f72585 0%, #b5179e 100%);
    color: #fff;
}

.value-card:hover .value-icon {
    transform: scale(1.1) rotate(5deg);
}

/* ===== 文字样式 ===== */
.value-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

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

/* ===== 变量定义 - 与首页/价值模块统一 ===== */
:root {
    /* 主色系 */
    --color-primary-gradient: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);

    /* 步骤色 - 渐变色区分 */
    --step-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --step-2: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --step-3: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
    --step-4: linear-gradient(135deg, #f72585 0%, #b5179e 100%);

    /* 圆角 & 阴影 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(67,97,238,0.15);
    --shadow-hover: 0 12px 32px rgba(67,97,238,0.25);

    /* 间距 & 动效 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    --transition-slow: all 0.5s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 模块容器 ===== */
.workflow-guide {
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 var(--spacing-xl);
    line-height: 1.4;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

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

/* ===== 流程容器 - PC端横向 ===== */
.workflow-steps {
    display: flex;
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

/* ===== 步骤卡片 ===== */
.step-card {
    flex: 1;
    min-width: 0;
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    position: relative;
    z-index: 1;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

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

/* 步骤卡片：悬停时顶部彩条展开 */
.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--step-1);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.step-card:nth-child(1)::before { background: var(--step-1); }
.step-card:nth-child(2)::before { background: var(--step-2); }
.step-card:nth-child(3)::before { background: var(--step-3); }
.step-card:nth-child(4)::before { background: var(--step-4); }

.step-card:hover::before {
    transform: scaleX(1);
}

/* ===== 步骤头部：数字+连接器 ===== */
.step-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.step-num {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-white);
    background: var(--step-1);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    flex-shrink: 0;
}

.step-card:nth-child(1) .step-num { background: var(--step-1); }
.step-card:nth-child(2) .step-num { background: var(--step-2); }
.step-card:nth-child(3) .step-num { background: var(--step-3); }
.step-card:nth-child(4) .step-num { background: var(--step-4); }

.step-card:hover .step-num {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.step-connector {
    color: var(--color-primary);
    opacity: 0.6;
    display: flex;
    align-items: center;
}

/* ===== 步骤内容 ===== */
.step-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.step-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
    line-height: 1.4;
}

.step-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0 0 var(--spacing-sm);
    min-height: 48px; /* 保持卡片高度一致 */
}

/* ===== 步骤链接按钮 ===== */
.step-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.step-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.step-link:hover {
    color: var(--color-primary-dark);
    background: var(--color-primary-light);
}

.step-link:hover::after {
    width: 80%;
}

.step-link .arrow {
    transition: var(--transition);
    flex-shrink: 0;
}

.step-link:hover .arrow {
    transform: translateX(3px);
}

/* ===== 底部提示文案 ===== */
.workflow-tip {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--color-border);
}

.workflow-tip small {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.tip-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    margin-left: 4px;
}

.tip-link:hover {
    text-decoration: underline;
}

.section-subtitle {
    text-align: center;
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin: 0 0 var(--spacing-xl);
    font-weight: 500;
}

.chat {
    width: 300px;
}

.chat_content {
    position: relative;
    background: #fff;
    padding: 20px 20px;
    border-radius: 5px;
    line-height: 25px;
    margin-bottom: 20px
}

.chat_content p {
    height: 80px;
    font-size: 0.9rem;
}

.chat_content i {
    display: block;
    margin: 0 auto;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-top-color: #fff;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0
}

.star_box {
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.star_box img {
    height: 12px;
    width: 12px;
    margin-right: 7px;
}

.chat_user {
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat_user .img {
    width: 70px;
    height: 70px;
    border-radius: 100%;
    overflow: hidden;
    display: inline-block;
    vertical-align: middle;
}

.chat_user .text {
    display: inline-block;
    vertical-align: middle;
    text-align: left;
    margin-left: 20px;
    font-size: 0.9rem;
    color: var(--color-text);
}

:root {
    --color-bg-footer: #f8fafc;
    --color-bg-footer-alt: #ffffff;
    --color-text-muted: #94a3b8;

    /* 圆角 & 阴影 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-badge: 0 2px 6px rgba(67,97,238,0.1);

    /* 间距 & 动效 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 页脚容器 ===== */
.site-footer {
    background: var(--color-bg-footer);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 顶部微装饰线 */
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

/* ===== 信任标识区 ===== */
.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    box-shadow: var(--shadow-badge);
    transition: var(--transition);
    cursor: default;
    user-select: none;
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67,97,238,0.2);
    border-color: var(--color-primary);
    background: var(--color-bg-footer-alt);
}

/* ===== 合规与链接区 ===== */
.compliance-info {
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--color-border);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xs) var(--spacing-sm);
    margin: 0 0 var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.footer-links a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--color-primary-dark);
    background: var(--color-primary-light);
    text-decoration: none;
}

.footer-links a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.separator {
    color: var(--color-border);
    user-select: none;
}

/* ===== 免责声明 ===== */
.disclaimer {
    margin: 0;
    line-height: 1.6;
}

.disclaimer small {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    display: block;
    max-width: 800px;
    margin: 0 auto;
    padding: 8px 12px;
    background: rgba(148, 163, 184, 0.08);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-text-muted);
    text-align: left;
}