摘要:
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>下拉框</title> 6 <style> 7 *{ 8 margin :0; 9 padding: 0; 10 } 11 div{ 12 阅读全文
摘要:
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>导航栏</title> 6 <style> 7 *{ 8 margin: 0; 9 } 10 ul{ 11 margin: 0 auto; 阅读全文