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                # CSS與CSS3 定位 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> position<span class="token2">:</span> absolute<span class="token2">;</span><span class="token6">//脫離文檔 絕對定位</span> relative 相對定位 fixeld 不滾動 static 默認 z<span class="token">-</span>index<span class="token2">:</span> <span class="token3">1</span><span class="token2">;</span>層關系 top<span class="token2">:</span> auto<span class="token2">;</span> left<span class="token2">:</span> auto<span class="token2">;</span> right<span class="token2">:</span> auto<span class="token2">;</span> bottom<span class="token2">:</span> auto<span class="token2">;</span> <span class="token2">}</span> ``` ``` 布局 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> display<span class="token2">:</span>inline<span class="token2">;</span>默認內聯元素 none 隱藏 block 塊元素 inline<span class="token">-</span>block 內聯塊元素 float<span class="token2">:</span>none<span class="token2">;</span>不浮動 left right clear<span class="token2">:</span> both<span class="token2">;</span>清除浮動 visibility<span class="token2">:</span> visible<span class="token2">;</span>對象可視 hidden對象隱藏 overflow<span class="token2">:</span> visible<span class="token2">;</span>溢出內容不作處理<span class="token2">,</span>可能超出容器 hidden隱藏不出現滾動條 scroll滾動 auto溢出出現滾動<span class="token2">,</span>不溢出沒有 overflow<span class="token">-</span>x<span class="token2">:</span> visible<span class="token2">;</span> overflow<span class="token">-</span>y<span class="token2">:</span> visible<span class="token2">;</span> 同上<span class="token2">,</span>表示水平方向和垂直方向 <span class="token2">}</span> ``` ``` 尺寸,支持像素 em 百分比等 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> width<span class="token2">:</span> auto<span class="token2">;</span> <span class="token3">12</span>px <span class="token3">10</span><span class="token">%</span> min<span class="token">-</span>width<span class="token2">:</span> <span class="token3">0</span><span class="token2">;</span> max<span class="token">-</span>width<span class="token2">:</span> none<span class="token2">;</span>沒有最大寬度 height<span class="token2">:</span> auto<span class="token2">;</span> min<span class="token">-</span>height<span class="token2">:</span> <span class="token3">0</span><span class="token2">;</span> max<span class="token">-</span>height<span class="token2">:</span> none<span class="token2">;</span> <span class="token2">}</span> ``` ``` 內外補白 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> margin<span class="token2">:</span> auto<span class="token2">;</span>可以負值 margin<span class="token">-</span>top<span class="token2">:</span> auto<span class="token2">;</span>上 margin<span class="token">-</span>bottom<span class="token2">:</span> auto<span class="token2">;</span>下 margin<span class="token">-</span>left<span class="token2">:</span> auto<span class="token2">;</span> margin<span class="token">-</span>right<span class="token2">:</span> auto<span class="token2">;</span> padding<span class="token2">:</span> <span class="token3">1</span>px<span class="token2">;</span>不可以負值<span class="token2">,</span>也沒有自動 padding<span class="token">-</span>bottom<span class="token2">:</span><span class="token3">1</span><span class="token">%</span><span class="token2">;</span> padding<span class="token">-</span>top<span class="token2">:</span> inherit<span class="token2">;</span> padding<span class="token">-</span>left<span class="token2">:</span> inherit<span class="token2">;</span> padding<span class="token">-</span>right<span class="token2">:</span><span class="token3">1</span>px<span class="token2">;</span> <span class="token2">}</span> ``` ``` 邊框 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> border<span class="token2">:</span> <span class="token3">1</span>px solid #fff<span class="token2">;</span> border<span class="token">-</span>width<span class="token2">:</span> <span class="token3">1</span>px<span class="token2">;</span> border<span class="token">-</span>style<span class="token2">:</span> solid<span class="token2">;</span>實線 none<span class="token2">;</span>沒有邊框<span class="token2">,</span>默認值 dotted<span class="token2">;</span>點狀 dashed<span class="token2">;</span>虛線 border<span class="token">-</span>color<span class="token2">:</span> #fff<span class="token2">;</span> border<span class="token">-</span>top<span class="token2">:</span> <span class="token3">1</span>px solid #fff<span class="token2">;</span> border<span class="token">-</span>bottom<span class="token2">:</span> <span class="token">!</span>important<span class="token2">;</span> border<span class="token">-</span>left<span class="token2">:</span> <span class="token">!</span>important<span class="token2">;</span> border<span class="token">-</span>right<span class="token2">:</span> <span class="token">!</span>important<span class="token2">;</span> <span class="token2">}</span> ``` ``` 背景 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> background<span class="token2">:</span><span class="token1">url</span><span class="token2">(</span>test1<span class="token2">.</span>jpg<span class="token2">)</span> no<span class="token">-</span>repeat scroll <span class="token3">0</span><span class="token">%</span> <span class="token3">0</span><span class="token">%</span><span class="token2">;</span> background<span class="token">-</span>color<span class="token2">:</span> transparent<span class="token2">;</span>默認透明 background<span class="token">-</span>image<span class="token2">:</span> none<span class="token2">;</span>無圖 <span class="token1">url</span><span class="token2">(</span><span class="token3">1.</span>img<span class="token2">)</span> background<span class="token">-</span>repeat<span class="token2">:</span> repeat<span class="token2">;</span>平鋪 no<span class="token">-</span>repeat 不平鋪 repeat<span class="token">-</span>x <span class="token2">;</span>repeat<span class="token">-</span>y 橫縱平鋪 background<span class="token">-</span>attachment<span class="token2">:</span> scroll<span class="token2">;</span> 滾動 fixed<span class="token2">;</span>固定 background<span class="token">-</span>position<span class="token2">:</span> <span class="token3">0</span><span class="token">%</span> <span class="token3">0</span><span class="token">%</span><span class="token2">;</span> left center right top bottom<span class="token2">;</span> background<span class="token">-</span>origin<span class="token2">:</span> padding<span class="token">-</span>box<span class="token2">;</span>背景從content顯示 border<span class="token">-</span>box<span class="token2">;</span>從border區域開始 padding<span class="token">-</span>box<span class="token2">;</span>從padding開始 background<span class="token">-</span>clip<span class="token2">:</span> border<span class="token">-</span>box<span class="token2">;</span>從padding向外剪裁 border<span class="token">-</span>box<span class="token2">;</span>從border開始<span class="token2">,</span>不含 content<span class="token">-</span>box<span class="token2">;</span>從content開始剪切 text<span class="token2">;</span>從內容開始 background<span class="token">-</span>size<span class="token2">:</span> auto<span class="token2">;</span>背景大小自動 cover<span class="token2">;</span>等比縮放完全覆蓋<span class="token2">,</span>會出容器 contain<span class="token2">;</span>等比縮放寬高和容器相等<span class="token2">,</span>始終在容器內 <span class="token2">}</span> ``` ``` 顏色 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> color<span class="token2">:</span> #FFF<span class="token2">;</span>文本顏色 opacity<span class="token2">:</span> <span class="token3">1</span><span class="token2">;</span><span class="token3">1</span>是不透明 <span class="token3">0</span>完全透明 取值<span class="token3">0.0</span><span class="token">-</span><span class="token3">1</span> <span class="token2">}</span> ``` ``` 字體 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> font<span class="token2">:</span> <span class="token3">12</span>px Simsun<span class="token2">,</span>arial<span class="token2">,</span>sans<span class="token">-</span>serif<span class="token2">;</span> font<span class="token">-</span>style<span class="token2">:</span> normal<span class="token2">;</span>字體正常 italic<span class="token2">;</span>斜體 font<span class="token">-</span>weight<span class="token2">:</span> normal<span class="token2">;</span>正常相當于<span class="token3">400</span> bold 粗體相當于<span class="token3">700</span> bolder 特粗 相當于b strong font<span class="token">-</span>size<span class="token2">:</span><span class="token3">12</span>px<span class="token2">;</span> font<span class="token">-</span>family<span class="token2">:</span> arial<span class="token2">;</span> <span class="token2">}</span> ``` ``` 文本 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> text<span class="token">-</span>transform<span class="token2">:</span> none<span class="token2">;</span> capitalize<span class="token2">;</span>首字母大寫 uppercase<span class="token2">;</span>轉換大寫 lowercase<span class="token2">;</span>轉小寫 white<span class="token">-</span>space<span class="token2">:</span> normal<span class="token2">;</span>空格處理默認 pre<span class="token">-</span>wrap<span class="token2">;</span>不合并空白<span class="token2">,</span>邊界處換行 nowrap<span class="token2">;</span>強制同一行顯示<span class="token2">,</span>合并多余空白<span class="token2">,</span>直到br word<span class="token">-</span><span class="token5">break</span><span class="token2">:</span> normal<span class="token2">;</span>換行 <span class="token5">break</span><span class="token">-</span>all<span class="token2">;</span> word<span class="token">-</span>wrap<span class="token2">:</span> normal<span class="token2">;</span> <span class="token5">break</span><span class="token">-</span>word<span class="token2">;</span>邊界處換行 text<span class="token">-</span>align<span class="token2">:</span> center<span class="token2">;</span>left<span class="token2">;</span>right<span class="token2">;</span> text<span class="token">-</span>indent<span class="token2">:</span> <span class="token3">0</span><span class="token2">;</span>縮進 vertical<span class="token">-</span>align<span class="token2">:</span> baseline<span class="token2">;</span> sub<span class="token2">;</span>下標 super<span class="token2">;</span>上標 middle<span class="token2">;</span>居中 line<span class="token">-</span>height<span class="token2">:</span> normal<span class="token2">;</span>行高 <span class="token2">}</span> ``` ``` 列表樣式 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> list<span class="token">-</span>style<span class="token2">:</span>disc outside none<span class="token2">;</span> list<span class="token">-</span>style<span class="token">-</span>image<span class="token2">:</span> none<span class="token2">;</span>不指定圖像 list<span class="token">-</span>style<span class="token">-</span>position<span class="token2">:</span> outside<span class="token2">;</span>文本以外 inside<span class="token2">;</span>文本以內 list<span class="token">-</span>style<span class="token">-</span>type<span class="token2">:</span> disc<span class="token2">;</span>實心圓 circle<span class="token2">;</span>空心圓 square<span class="token2">;</span>實心方塊 decimal<span class="token2">;</span>數字 none<span class="token2">;</span>不使用 <span class="token2">}</span> ``` ``` 表格樣式 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> border<span class="token">-</span>collapse<span class="token2">:</span> collapse<span class="token2">;</span>合并邊框 <span class="token2">}</span> ``` ``` 用戶界面 ``` <pre class="calibre14">``` <span class="token2">.</span>c<span class="token2">{</span> text<span class="token">-</span>overflow<span class="token2">:</span> clip<span class="token2">;</span>文本溢出不顯示<span class="token2">.</span><span class="token2">.</span><span class="token2">.</span> ellipsis<span class="token2">;</span>顯示 outline<span class="token2">:</span> none<span class="token2">;</span>輪廓樣式無輪廓 cursor<span class="token2">:</span> pointer<span class="token2">;</span>手 move移動 支持<span class="token1">url</span><span class="token2">(</span><span class="token2">)</span> box<span class="token">-</span>sizing<span class="token2">:</span> content<span class="token">-</span>box<span class="token2">;</span>盒子padding和border不包括在寬高內 border<span class="token">-</span>box<span class="token2">;</span>包含內<span class="token2">;</span> user<span class="token">-</span>select<span class="token2">:</span>text<span class="token2">;</span>可以選擇文本 none<span class="token2">;</span>文本不能選擇 <span class="token2">}</span> ``` ``` 選擇 ``` <pre class="calibre16">``` ul<span class="token">></span>li<span class="token2">{</span> <span class="token6">//子選擇器</span> <span class="token2">}</span> ul li<span class="token2">{</span> <span class="token6">//包含選擇</span> <span class="token2">}</span> p<span class="token">+</span>p<span class="token2">{</span> <span class="token6">//相鄰選擇</span> <span class="token2">}</span> p<span class="token">~</span>p<span class="token2">{</span> <span class="token6">//兄弟選擇</span> <span class="token2">}</span> input<span class="token2">[</span>type<span class="token">=</span><span class="token4">"text"</span><span class="token2">]</span><span class="token2">{</span><span class="token2">{</span> <span class="token6">//屬性選擇</span> <span class="token2">}</span> a<span class="token2">:</span>link<span class="token2">{</span> <span class="token2">}</span> a<span class="token2">:</span>visited<span class="token2">{</span> <span class="token2">}</span> a<span class="token2">:</span>hover<span class="token2">{</span> <span class="token2">}</span> a<span class="token2">:</span>active<span class="token2">{</span> <span class="token2">}</span> a<span class="token2">:</span>focus<span class="token2">{</span> <span class="token2">}</span> ul li<span class="token2">:</span>first<span class="token">-</span>child<span class="token2">{</span> <span class="token6">//第一個</span> <span class="token2">}</span> ul li<span class="token2">:</span>last<span class="token">-</span>child<span class="token2">{</span> <span class="token6">//最后一個</span> <span class="token2">}</span> ``` ```
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                              哎呀哎呀视频在线观看