/* 特色功能展示区 */
.features {
    padding: 80px 0;
    background-color: #f8fafc;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
}

.features-header {
    text-align: center;
    margin-bottom: 48px;
}

.features-title {
    font-size: 32px;
    font-weight: 700;
    color: #1a2332;
    margin: 0 0 12px;
}

.features-subtitle {
    font-size: 16px;
    color: #6b7280;
    margin: 0;
}

/* 网格布局 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* 功能卡片 */
.feat-card {
    background-color: #fff;
    border: 1px solid #e8ecf1;
    border-radius: 12px;
    padding: 28px 24px;
    position: relative;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feat-card:hover {
    border-color: #1a73e8;
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.08);
}

/* 编号 */
.feat-num {
    font-size: 40px;
    font-weight: 800;
    color: #e8ecf1;
    line-height: 1;
    margin-bottom: 8px;
    user-select: none;
}

.feat-card:hover .feat-num {
    color: #1a73e8;
    opacity: 0.15;
}

/* 卡片标题 */
.feat-card-title {
    font-size: 18px;
    font-weight: 700;
    color: #1a2332;
    margin: 0 0 16px;
}

/* 功能列表 */
.feat-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feat-list li {
    font-size: 14px;
    line-height: 1.65;
    color: #4a5568;
    padding: 4px 0;
    border-bottom: 1px solid #f1f5f9;
}

.feat-list li:last-child {
    border-bottom: none;
}

.feat-list li strong {
    color: #0d9488;
    font-weight: 600;
}

/* 彩蛋卡片特殊样式 */
.feat-card-accent {
    background: linear-gradient(135deg, #f0f9ff 0%, #f8fafc 100%);
    border-color: #bfdbfe;
}

.feat-card-accent .feat-num {
    color: #bfdbfe;
}

/* 暗色模式 */
body.dark-mode .features {
    background-color: #141414;
}

body.dark-mode .features-title {
    color: #e0e0e0;
}

body.dark-mode .features-subtitle {
    color: #8896a6;
}

body.dark-mode .feat-card {
    background-color: #1e1e1e;
    border-color: #2a3140;
}

body.dark-mode .feat-card:hover {
    border-color: #4da3ff;
    box-shadow: 0 4px 16px rgba(77, 163, 255, 0.08);
}

body.dark-mode .feat-num {
    color: #2a3140;
}

body.dark-mode .feat-card:hover .feat-num {
    color: #4da3ff;
    opacity: 0.2;
}

body.dark-mode .feat-card-title {
    color: #d0d8e4;
}

body.dark-mode .feat-list li {
    color: #8896a6;
    border-bottom-color: #252d3a;
}

body.dark-mode .feat-list li strong {
    color: #2dd4bf;
}

body.dark-mode .feat-card-accent {
    background: linear-gradient(135deg, #1a2540 0%, #1e1e1e 100%);
    border-color: #2a3a55;
}

body.dark-mode .feat-card-accent .feat-num {
    color: #2a3a55;
}

/* 响应式 */
@media (max-width: 970px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .features {
        padding: 56px 0;
    }

    .features-container {
        padding: 0 20px;
    }

    .features-header {
        margin-bottom: 36px;
    }

    .features-title {
        font-size: 26px;
    }

    .features-subtitle {
        font-size: 14px;
    }

    .feat-card {
        padding: 20px 18px;
    }

    .feat-num {
        font-size: 32px;
    }

    .feat-card-title {
        font-size: 16px;
    }

    .feat-list li {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .features {
        padding: 40px 0;
    }

    .features-container {
        padding: 0 16px;
    }

    .features-header {
        margin-bottom: 28px;
    }

    .features-title {
        font-size: 22px;
    }

    .feat-card {
        padding: 16px 14px;
    }

    .feat-num {
        font-size: 28px;
    }

    .feat-card-title {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .feat-list li {
        font-size: 12px;
        line-height: 1.6;
    }
}