14种纯css3对话气泡样式代码

Posted on 2025-09-26 16:02 且行且思阅读(24) 评论(0) 收藏举报

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>14种纯css3对话气泡样式代码</title>
    <link rel="stylesheet" href="default.css" />
  </head>
  <body>
    <div id="container">
      <div class="content">
        <h2>The basic bubble variants</h2>
        <p class="triangle-isosceles">This only needs one HTML element.</p>
        <p class="triangle-isosceles top">
          For example, <code>&lt;p&gt;[text]&lt;/p&gt;</code>.
        </p>
        <p class="triangle-isosceles left">
          But it could be any element you want.
        </p>
        <p class="triangle-isosceles right">
          The entire appearance is created only with CSS.
        </p>
        <p class="triangle-right">This only needs one HTML element.</p>
        <p class="triangle-right top">
          For example, <code>&lt;p&gt;[text]&lt;/p&gt;</code>.
        </p>
        <p class="triangle-right left">But it could be any element you want.</p>
        <p class="triangle-right right">
          The entire appearance is created only with CSS.
        </p>
        <p class="triangle-obtuse">This only needs one HTML element.</p>
        <p class="triangle-obtuse top">
          For example, <code>&lt;p&gt;[text]&lt;/p&gt;</code>.
        </p>
        <p class="triangle-obtuse left">
          But it could be any element you want.
        </p>
        <p class="triangle-obtuse right">
          The entire appearance is created only with CSS.
        </p>
        <p class="triangle-border">This only needs one HTML element.</p>
        <p class="triangle-border top">
          For example, <code>&lt;p&gt;[text]&lt;/p&gt;</code>.
        </p>
        <p class="triangle-border left">
          But it could be any element you want.
        </p>
        <p class="triangle-border right">
          The entire appearance is created only with CSS.
        </p>
        <h2>Simple examples</h2>
        <h3 class="example-commentheading">125 comments</h3>
        <blockquote class="example-right">
          <p>
            Design is directed toward human beings. To design is to solve human
            problems by identifying them and executing the best solution.
          </p>
        </blockquote>
        <p>Ivan Chermayeff</p>
        <blockquote class="example-obtuse">
          <p>
            It&#8217;s not what you look at that matters, it&#8217;s what you
            see.
          </p>
        </blockquote>
        <p>Henry David Thoreau</p>
        <blockquote
          class="example-twitter"
          cite="http://twitter.com/necolas/status/9880187933"
        >
          <p>
            Takes me longer to write up blog posts on experiments or projects
            than to create them in the first place.
          </p>
        </blockquote>
        <p>
          <a href="http://twitter.com/necolas">@necolas</a>at
          <a href="http://twitter.com/necolas/status/9880187933">
            4:05 PM March 2nd 2010</a
          >
        </p>
        <div class="example-number">57</div>
        <h2>More complex CSS3 examples</h2>
        <p>
          Some more experimental speech bubbles that try to limit the damage in
          browsers lacking the necessary CSS3 support.
        </p>
        <div class="pinched">
          <p>
            <strong
              >It doesn&#8217;t matter what the first child element of this div
              is</strong
            >...but it does need a child element.
          </p>
        </div>
        <blockquote class="oval-speech">
          <p>
            This is a blockquote that is styled to look like a speech bubble
          </p>
        </blockquote>
        <blockquote class="oval-thought">
          <p>
            This is a blockquote that is styled to look like a thought bubble
          </p>
        </blockquote>
        <blockquote class="oval-quotes">
          <p>
            No, Donny, these men are nihilists, there&#8217;s nothing to be
            afraid of.
          </p>
        </blockquote>
        <p>Walter Sobchak</p>
        <blockquote class="rectangle-speech-border">
          <p>
            This is a blockquote that is styled to look like a speech bubble
          </p>
        </blockquote>
        <blockquote class="oval-speech-border">
          <p>
            This is a blockquote that is styled to look like a speech bubble
          </p>
        </blockquote>
        <blockquote class="oval-thought-border">
          <p>
            This is a blockquote that is styled to look like a thought bubble
          </p>
        </blockquote>
      </div>
    </div>
  </body>
</html>

CSS

body {
    padding: 0;
    margin: 0;
    font: 1em/1.4 Cambria, Georgia, sans-serif;
    color: #333;
    background: #fff;
}

a:link,
a:visited {
    border-bottom: 1px solid #c55500;
    color: #c55500;
    text-decoration: none;
}

a:visited {
    border-bottom: 1px solid #730800;
    color: #730800;
}

a:hover,
a:focus,
a:active {
    border: 0;
    color: #fff;
    background: #c55500;
}

a:visited:hover,
a:visited:focus,
a:visited:active {
    color: #fff;
    background: #730800;
}

#container {
    width: 500px;
    padding: 0 0 50px;
    margin: 0 auto;
}

h1 {
    margin: 1em 0 0;
    font-size: 2.5em;
    font-weight: normal;
    line-height: 1.2;
    text-align: center;
}

h2 {
    margin: 0.5em 0 1.5em;
    font-size: 1.25em;
    font-weight: normal;
    font-style: italic;
    text-align: center;
}

p {
    margin: 1em 0;
}

.content h2 {
    margin: 2em 0 0.75em;
    font-size: 2em;
    font-weight: bold;
    font-style: normal;
    text-align: left;
}

blockquote {
    margin: 1em 0;
}

blockquote p {
    margin: 0;
    font-size: 2em;
}

.follow {
    clear: both;
    margin-top: 2em;
    font-size: 1.125em;
}

.follow span {
    font-weight: bold;
}

/*  Should you want to set a background colour on a containing element certain types of bubble effect may require you to include these  style declarations. */
.content {
    position: relative;
    z-index: 1;
}

/* ============================================================================================================================== BUBBLE WITH AN ISOCELES TRIANGLE** ============================================================================================================================ */
/* THE SPEECH BUBBLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-isosceles {
    position: relative;
    padding: 15px;
    margin: 1em 0 3em;
    color: #000;
    background: #f3961c;
    /* default background for browsers without gradient support */
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#f9d835), to(#f3961c));
    background: -moz-linear-gradient(top, #f9d835, #f3961c);
    background: -o-linear-gradient(top, #f9d835, #f3961c);
}

/* Variant : for top positioned triangle------------------------------------------ */
.triangle-isosceles.top {
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#f3961c), to(#f9d835));
    background: -moz-linear-gradient(top, #f3961c, #f9d835);
    background: -o-linear-gradient(top, #f3961c, #f9d835);
}

/* Variant : for left/right positioned triangle------------------------------------------ */
.triangle-isosceles.left {
    margin-left: 50px;
    background: #f3961c;
}

/* Variant : for right positioned triangle------------------------------------------ */
.triangle-isosceles.right {
    margin-right: 50px;
    background: #f3961c;
}

/* THE TRIANGLE------------------------------------------------------------------------------------------------------------------------------- */
/* creates triangle */
.triangle-isosceles:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -15px;
    /* value = - border-top-width - border-bottom-width */
    left: 50px;
    /* controls horizontal position */
    width: 0;
    height: 0;
    border-width: 15px 15px 0;
    /* vary these values to change the angle of the vertex */
    border-style: solid;
    border-color: #f3961c transparent;
}

/* Variant : top------------------------------------------ */
.triangle-isosceles.top:after {
    top: -15px;
    /* value = - border-top-width - border-bottom-width */
    right: 50px;
    /* controls horizontal position */
    bottom: auto;
    left: auto;
    border-width: 0 15px 15px;
    /* vary these values to change the angle of the vertex */
    border-color: #f3961c transparent;
}

/* Variant : left------------------------------------------ */
.triangle-isosceles.left:after {
    top: 16px;
    /* controls vertical position */
    left: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border-width: 10px 50px 10px 0;
    border-color: transparent #f3961c;
}

/* Variant : right------------------------------------------ */
.triangle-isosceles.right:after {
    top: 16px;
    /* controls vertical position */
    right: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    left: auto;
    border-width: 10px 0 10px 50px;
    border-color: transparent #f3961c;
}

/* ============================================================================================================================== BUBBLE WITH A RIGHT-ANGLED TRIANGLE** ============================================================================================================================ */
/* THE SPEECH BUBBLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-right {
    position: relative;
    padding: 15px;
    margin: 1em 0 3em;
    color: #fff;
    background: #075698;
    /* default background for browsers without gradient support */
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#2e88c4), to(#075698));
    background: -moz-linear-gradient(top, #2e88c4, #075698);
    background: -o-linear-gradient(top, #2e88c4, #075698);
}

/* Variant : for top positioned triangle------------------------------------------ */
.triangle-right.top {
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#075698), to(#2e88c4));
    background: -moz-linear-gradient(top, #075698, #2e88c4);
    background: -o-linear-gradient(top, #075698, #2e88c4);
}

/* Variant : for left positioned triangle------------------------------------------ */
.triangle-right.left {
    margin-left: 40px;
    background: #075698;
}

/* Variant : for right positioned triangle------------------------------------------ */
.triangle-right.right {
    margin-right: 40px;
    background: #075698;
}

/* THE TRIANGLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-right:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -20px;
    /* value = - border-top-width - border-bottom-width */
    left: 50px;
    /* controls horizontal position */
    width: 0;
    height: 0;
    border-width: 20px 0 0 20px;
    /* vary these values to change the angle of the vertex */
    border-style: solid;
    border-color: #075698 transparent;
}

/* Variant : top------------------------------------------ */
.triangle-right.top:after {
    top: -20px;
    /* value = - border-top-width - border-bottom-width */
    right: 50px;
    /* controls horizontal position */
    bottom: auto;
    left: auto;
    border-width: 20px 20px 0 0;
    /* vary these values to change the angle of the vertex */
    border-color: transparent #075698;
}

/* Variant : left------------------------------------------ */
.triangle-right.left:after {
    top: 16px;
    left: -40px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border-width: 15px 40px 0 0;
    /* vary these values to change the angle of the vertex */
    border-color: transparent #075698;
}

/* Variant : right------------------------------------------ */
.triangle-right.right:after {
    top: 16px;
    right: -40px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    left: auto;
    border-width: 15px 0 0 40px;
    /* vary these values to change the angle of the vertex */
    border-color: transparent #075698;
}

/* ============================================================================================================================== BUBBLE WITH AN OBTUSE TRIANGLE** ============================================================================================================================ */
/* THE SPEECH BUBBLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-obtuse {
    position: relative;
    padding: 15px;
    margin: 1em 0 3em;
    color: #fff;
    background: #c81e2b;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#f04349), to(#c81e2b));
    background: -moz-linear-gradient(top, #f04349, #c81e2b);
    background: -o-linear-gradient(top, #f04349, #c81e2b);
}

/* Variant : for top positioned triangle------------------------------------------ */
.triangle-obtuse.top {
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#c81e2b), to(#f04349));
    background: -moz-linear-gradient(top, #c81e2b, #f04349);
    background: -o-linear-gradient(top, #c81e2b, #f04349);
}

/* Variant : for left positioned triangle------------------------------------------ */
.triangle-obtuse.left {
    margin-left: 50px;
    background: #c81e2b;
}

/* Variant : for right positioned triangle------------------------------------------ */
.triangle-obtuse.right {
    margin-right: 50px;
    background: #c81e2b;
}

/* THE TRIANGLE------------------------------------------------------------------------------------------------------------------------------- */
/* creates the wider right-angled triangle */
.triangle-obtuse:before {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -20px;
    /* value = - border-top-width - border-bottom-width */
    left: 60px;
    /* controls horizontal position */
    width: 0;
    height: 0;
    border: 0;
    border-right-width: 30px;
    /* vary this value to change the angle of the vertex */
    border-bottom-width: 20px;
    /* vary this value to change the height of the triangle. must be equal to the corresponding value in :after */
    border-style: solid;
    border-color: transparent #c81e2b;
}

/* creates the narrower right-angled triangle */
.triangle-obtuse:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -20px;
    /* value = - border-top-width - border-bottom-width */
    left: 80px;
    /* value = (:before's left) + (:before's border-right/left-width)  - (:after's border-right/left-width) */
    width: 0;
    height: 0;
    border-width: 0;
    border-right-width: 10px;
    /* vary this value to change the angle of the vertex */
    border-bottom-width: 20px;
    /* vary this value to change the height of the triangle. must be equal to the corresponding value in :before */
    border-style: solid;
    border-color: transparent #fff;
}

/* Variant : top------------------------------------------ */
.triangle-obtuse.top:before {
    top: -20px;
    /* value = - border-top-width - border-bottom-width */
    right: 60px;
    /* controls horizontal position */
    bottom: auto;
    left: auto;
    border: 0;
    border-left-width: 30px;
    /* vary this value to change the width of the triangle */
    border-top-width: 20px;
    /* vary this value to change the height of the triangle. must be equal to the corresponding value in :after */
    border-style: solid;
    border-color: transparent #c81e2b;
}

.triangle-obtuse.top:after {
    top: -20px;
    /* value = - border-top-width - border-bottom-width */
    right: 80px;
    /* value = (:before's right) + (:before's border-right/left-width)  - (:after's border-right/left-width) */
    bottom: auto;
    left: auto;
    border-width: 0;
    border-left-width: 10px;
    /* vary this value to change the width of the triangle */
    border-top-width: 20px;
    /* vary this value to change the height of the triangle. must be equal to the corresponding value in :before */
    border-style: solid;
    border-color: transparent #fff;
}

/* Variant : left------------------------------------------ */
.triangle-obtuse.left:before {
    top: 15px;
    /* controls vertical position */
    left: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border: 0;
    border-bottom-width: 30px;
    /* vary this value to change the height of the triangle */
    border-left-width: 50px;
    /* vary this value to change the width of the triangle. must be equal to the corresponding value in :after */
    border-style: solid;
    border-color: #c81e2b transparent;
}

.triangle-obtuse.left:after {
    top: 35px;
    /* value = (:before's top) + (:before's border-top/bottom-width)  - (:after's border-top/bottom-width) */
    left: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border: 0;
    border-bottom-width: 10px;
    /* vary this value to change the height of the triangle */
    border-left-width: 50px;
    /* vary this value to change the width of the triangle. must be equal to the corresponding value in :before */
    border-style: solid;
    border-color: #fff transparent;
}

/* Variant : right------------------------------------------ */
.triangle-obtuse.right:before {
    top: 15px;
    /* controls vertical position */
    right: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border: 0;
    left: auto;
    border-bottom-width: 30px;
    /* vary this value to change the height of the triangle */
    border-right-width: 50px;
    /* vary this value to change the width of the triangle. must be equal to the corresponding value in :after */
    border-style: solid;
    border-color: #c81e2b transparent;
}

.triangle-obtuse.right:after {
    top: 35px;
    /* value = (:before's top) + (:before's border-top/bottom-width)  - (:after's border-top/bottom-width) */
    right: -50px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border: 0;
    left: auto;
    border-bottom-width: 10px;
    /* vary this value to change the height of the triangle */
    border-right-width: 50px;
    /* vary this value to change the width of the triangle. must be equal to the corresponding value in :before */
    border-style: solid;
    border-color: #fff transparent;
}

/* ============================================================================================================================== BUBBLE WITH A BORDER AND TRIANGLE** ============================================================================================================================ */
/* THE SPEECH BUBBLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-border {
    position: relative;
    padding: 15px;
    margin: 1em 0 3em;
    border: 5px solid #5a8f00;
    color: #333;
    background: #fff;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
}

/* Variant : for left positioned triangle------------------------------------------ */
.triangle-border.left {
    margin-left: 30px;
}

/* Variant : for right positioned triangle------------------------------------------ */
.triangle-border.right {
    margin-right: 30px;
}

/* THE TRIANGLE------------------------------------------------------------------------------------------------------------------------------- */
.triangle-border:before {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -40px;
    /* value = - border-top-width - border-bottom-width */
    left: 40px;
    /* controls horizontal position */
    width: 0;
    height: 0;
    border: 20px solid transparent;
    border-top-color: #5a8f00;
}

/* creates the smaller  triangle */
.triangle-border:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -26px;
    /* value = - border-top-width - border-bottom-width */
    left: 47px;
    /* value = (:before left) + (:before border-left) - (:after border-left) */
    width: 0;
    height: 0;
    border: 13px solid transparent;
    border-top-color: #fff;
}

/* Variant : top------------------------------------------ */
/* creates the larger triangle */
.triangle-border.top:before {
    top: -40px;
    /* value = - border-top-width - border-bottom-width */
    right: 40px;
    /* controls horizontal position */
    bottom: auto;
    left: auto;
    border: 20px solid transparent;
    border-bottom-color: #5a8f00;
}

/* creates the smaller  triangle */
.triangle-border.top:after {
    top: -26px;
    /* value = - border-top-width - border-bottom-width */
    right: 47px;
    /* value = (:before right) + (:before border-right) - (:after border-right) */
    bottom: auto;
    left: auto;
    border: 13px solid transparent;
    border-bottom-color: #fff;
}

/* Variant : left------------------------------------------ */
/* creates the larger triangle */
.triangle-border.left:before {
    top: 10px;
    /* controls vertical position */
    left: -30px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border-width: 15px 30px 15px 0;
    border-style: solid;
    border-color: transparent #5a8f00;
}

/* creates the smaller  triangle */
.triangle-border.left:after {
    top: 16px;
    /* value = (:before top) + (:before border-top) - (:after border-top) */
    left: -21px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    border-width: 9px 21px 9px 0;
    border-style: solid;
    border-color: transparent #fff;
}

/* Variant : right------------------------------------------ */
/* creates the larger triangle */
.triangle-border.right:before {
    top: 10px;
    /* controls vertical position */
    right: -30px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    left: auto;
    border-width: 15px 0 15px 30px;
    border-style: solid;
    border-color: transparent #5a8f00;
}

/* creates the smaller  triangle */
.triangle-border.right:after {
    top: 16px;
    /* value = (:before top) + (:before border-top) - (:after border-top) */
    right: -21px;
    /* value = - border-left-width - border-right-width */
    bottom: auto;
    left: auto;
    border-width: 9px 0 9px 21px;
    border-style: solid;
    border-color: transparent #fff;
}

/* ============================================================================================================================== SPEECH BUBBLE ICON** ============================================================================================================================ */
.example-commentheading {
    position: relative;
    padding: 0;
    color: #b513af;
}

/* creates the rectangle */
.example-commentheading:before {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    top: 9px;
    left: -25px;
    width: 15px;
    height: 10px;
    background: #b513af;
    /* css3 */
    -moz-border-radius: 3px;
    -webkit-border-radius: 3px;
    border-radius: 3px;
}

/* creates the triangle */
.example-commentheading:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    top: 15px;
    left: -19px;
    width: 0;
    height: 0;
    border: 4px solid transparent;
    border-left-color: #b513af;
}

/* ============================================================================================================================== BLOCKQUOTE WITH RIGHT-ANGLED TRIANGLE** ============================================================================================================================ */
.example-right {
    position: relative;
    padding: 15px 30px;
    margin: 0;
    color: #fff;
    background: #5a8f00;
    /* default background for browsers without gradient support */
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#b8db29), to(#5a8f00));
    background: -moz-linear-gradient(top, #b8db29, #5a8f00);
    background: -o-linear-gradient(top, #b8db29, #5a8f00);
}

/* display of quote author (alternatively use a class on the element following the blockquote) */
.example-right+p {
    margin: 15px 0 2em 85px;
    font-style: italic;
}

/* creates the triangle */
.example-right:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -50px;
    left: 50px;
    width: 0;
    height: 0;
    border-width: 0 20px 50px 0px;
    border-style: solid;
    border-color: transparent #5a8f00;
}

/* ============================================================================================================================== BLOCKQUOTE WITH OBTUSE TRIANGLE** ============================================================================================================================ */
.example-obtuse {
    position: relative;
    padding: 15px 30px;
    margin: 0;
    color: #000;
    background: #f3961c;
    /* default background for browsers without gradient support */
    /* css3    Using longhand to avoid inconsistencies between Safari 4 and Chrome 4    */
    -webkit-border-top-left-radius: 25px 50px;
    -webkit-border-top-right-radius: 25px 50px;
    -webkit-border-bottom-right-radius: 25px 50px;
    -webkit-border-bottom-left-radius: 25px 50px;
    -moz-border-radius: 25px / 50px;
    border-radius: 25px / 50px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#f9d835), to(#f3961c));
    background: -moz-linear-gradient(top, #f9d835, #f3961c);
    background: -o-linear-gradient(top, #f9d835, #f3961c);
}

/* display of quote author (alternatively use a class on the element following the blockquote) */
.example-obtuse+p {
    margin: 10px 150px 2em 0;
    text-align: right;
    font-style: italic;
}

/* creates the larger triangle */
.example-obtuse:before {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -30px;
    right: 80px;
    width: 0;
    height: 0;
    border-width: 0 0 30px 50px;
    border-style: solid;
    border-color: transparent #f3961c;
}

/* creates the smaller triangle */
.example-obtuse:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -30px;
    right: 110px;
    width: 0;
    height: 0;
    border-width: 0 0 30px 20px;
    border-style: solid;
    border-color: transparent #fff;
}

/* ============================================================================================================================== TWITTER** ============================================================================================================================ */
.example-twitter {
    position: relative;
    padding: 15px;
    margin: 100px 0 0.5em;
    color: #333;
    background: #eee;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
}

.example-twitter p {
    font-size: 28px;
    line-height: 1.25em;
}

/* this isn't necessary, just saves me having to edit the HTML of the demo */
.example-twitter:before {
    content: url(twitter-logo.gif);
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    top: -60px;
    left: 0;
    width: 155px;
    height: 36px;
}

/* creates the triangle */
.example-twitter:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    top: -30px;
    left: 50px;
    width: 0;
    height: 0;
    border: 15px solid transparent;
    border-bottom-color: #eee;
}

/* display of quote author (alternatively use a class on the element following the blockquote) */
.example-twitter+p {
    padding-left: 15px;
    font: 14px Arial, sans-serif;
}

/* ============================================================================================================================== NUMBER** ============================================================================================================================ */
.example-number {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 50px 0 200px;
    text-align: center;
    font: 140px/200px Arial, sans-serif;
    color: #fff;
    background: #C91F2C;
}

/* creates the larger triangle */
.example-number:before {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -140px;
    right: 0;
    width: 0;
    height: 0;
    border-width: 0 0 140px 140px;
    border-style: solid;
    border-color: transparent #C91F2C;
}

/* creates the larger triangle */
.example-number:after {
    content: "";
    display: block;
    /* reduce the damage in FF3.0 */
    position: absolute;
    bottom: -140px;
    right: 85px;
    width: 0;
    height: 0;
    border-width: 0 0 140px 55px;
    border-style: solid;
    border-color: transparent #fff;
}

/* ============================================================================================================================== PINCHED SPEECH BUBBLE (more CSS3)** ============================================================================================================================ */
.pinched {
    position: relative;
    padding: 15px;
    margin: 50px 0 3em;
    text-align: center;
    color: #fff;
    background: #333;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
}

/* creates a rectangle of the colour wanted for the pointy bit */
.pinched:before {
    content: "";
    position: absolute;
    top: -20px;
    left: 50%;
    width: 100px;
    height: 20px;
    margin: 0 0 0 -50px;
    background: #333;
}

/* creates a rounded rectangle to cover part of the rectangle generated above */
.pinched:after {
    content: "";
    position: absolute;
    top: -20px;
    left: 0;
    width: 50%;
    height: 20px;
    background: #fff;
    /* css3 */
    -moz-border-radius-bottomright: 15px;
    -webkit-border-bottom-right-radius: 15px;
    border-bottom-right-radius: 15px;
}

/* creates the other rounded rectangle */
.pinched>:first-child:before {
    content: "";
    position: absolute;
    top: -20px;
    right: 0;
    width: 50%;
    height: 20px;
    background: #fff;
    /* css3 */
    -moz-border-radius-bottomleft: 15px;
    -webkit-border-bottom-left-radius: 15px;
    border-bottom-left-radius: 15px;
}

/* ============================================================================================================================== OVAL SPEECH BUBBLE (more CSS3)** ============================================================================================================================ */
.oval-speech {
    position: relative;
    width: 270px;
    padding: 50px 40px;
    margin: 1em auto 50px;
    text-align: center;
    color: #fff;
    background: #5a8f00;
    /* css3 */
    /*    NOTES:    -webkit-border-radius:220px 120px; // produces oval in safari 4 and chrome 4    -webkit-border-radius:220px / 120px; // produces oval in chrome 4 (again!) but not supported in safari 4    Not correct application of the current spec, therefore, using longhand to avoid future problems with webkit corrects this    */
    -webkit-border-top-left-radius: 220px 120px;
    -webkit-border-top-right-radius: 220px 120px;
    -webkit-border-bottom-right-radius: 220px 120px;
    -webkit-border-bottom-left-radius: 220px 120px;
    -moz-border-radius: 220px / 120px;
    border-radius: 220px / 120px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#b8db29), to(#5a8f00));
    background: -moz-linear-gradient(top, #b8db29, #5a8f00);
    background: -o-linear-gradient(top, #b8db29, #5a8f00);
}

.oval-speech p {
    font-size: 1.25em;
}

/* creates part of the curve */
.oval-speech:before {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -30px;
    right: 50%;
    width: 0;
    height: 30px;
    border-right: 60px solid #5a8f00;
    background: #5a8f00;
    /* need this for webkit - bug in handling of border-radius */
    /* css3 */
    -moz-border-radius-bottomright: 80px 50px;
    -webkit-border-bottom-right-radius: 80px 50px;
    border-bottom-right-radius: 80px 50px;
    /* using translate to avoid undesired appearance in CSS2.1-capabable but CSS3-incapable browsers */
    -moz-transform: translate(0, -2px);
    -webkit-transform: translate(0, -2px);
    -o-transform: translate(0, -2px);
    transform: translate(0, -2px);
}

/* creates part of the curved pointy bit */
.oval-speech:after {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -30px;
    right: 50%;
    width: 60px;
    height: 30px;
    background: #fff;
    /* css3 */
    -moz-border-radius-bottomright: 40px 50px;
    -webkit-border-bottom-right-radius: 40px 50px;
    border-bottom-right-radius: 40px 50px;
    /* using translate to avoid undesired appearance in CSS2.1-capabable but CSS3-incapable browsers */
    -moz-transform: translate(-30px, -2px);
    -webkit-transform: translate(-30px, -2px);
    -o-transform: translate(-30px, -2px);
    transform: translate(-30px, -2px);
}

/* ============================================================================================================================== OVAL THOUGHT BUBBLE (more CSS3)** ============================================================================================================================ */
.oval-thought {
    position: relative;
    width: 270px;
    padding: 50px 40px;
    margin: 1em auto 80px;
    text-align: center;
    color: #fff;
    background: #075698;
    /* css3 */
    /*    NOTES:    -webkit-border-radius:220px 120px; // produces oval in safari 4 and chrome 4    -webkit-border-radius:220px / 120px; // produces oval in chrome 4 (again!) but not supported in safari 4    Not correct application of the current spec, therefore, using longhand to avoid future problems with webkit corrects this    */
    -webkit-border-top-left-radius: 220px 120px;
    -webkit-border-top-right-radius: 220px 120px;
    -webkit-border-bottom-right-radius: 220px 120px;
    -webkit-border-bottom-left-radius: 220px 120px;
    -moz-border-radius: 220px / 120px;
    border-radius: 220px / 120px;
    /* NOTE: webkit gradient implementation is not as per spec */
    background: -webkit-gradient(linear, left top, left bottom, from(#2e88c4), to(#075698));
    background: -moz-linear-gradient(top, #2e88c4, #075698);
    background: -o-linear-gradient(top, #2e88c4, #075698);
}

.oval-thought p {
    font-size: 1.25em;
}

/* creates the larger circle */
.oval-thought:before {
    content: "";
    position: absolute;
    bottom: -20px;
    left: 50px;
    width: 30px;
    height: 30px;
    background: #075698;
    /* css3 */
    -moz-border-radius: 30px;
    -webkit-border-radius: 30px;
    border-radius: 30px;
}

/* creates the smaller circle */
.oval-thought:after {
    content: "";
    position: absolute;
    bottom: -30px;
    left: 30px;
    width: 15px;
    height: 15px;
    background: #075698;
    /* css3 */
    -moz-border-radius: 15px;
    -webkit-border-radius: 15px;
    border-radius: 15px;
}

/* ============================================================================================================================== OVAL SPEECH BUBBLE WITH QUOTATION MARKS (more CSS3)** ============================================================================================================================ */
.oval-quotes {
    position: relative;
    width: 400px;
    height: 350px;
    margin: 2em auto 10px;
    color: #000;
    background: #ffed26;
    /* css3 */
    /*    NOTES:    -webkit-border-radius:Apx Bpx; // produces oval in safari 4 and chrome 4    -webkit-border-radius:Apx / Bpx; // produces oval in chrome 4 (again!) but not supported in safari 4    Not correct application of the current spec, therefore, using longhand to avoid future problems with webkit corrects this    */
    -webkit-border-top-left-radius: 400px 350px;
    -webkit-border-top-right-radius: 400px 350px;
    -webkit-border-bottom-right-radius: 400px 350px;
    -webkit-border-bottom-left-radius: 400px 350px;
    -moz-border-radius: 400px / 350px;
    border-radius: 400px / 350px;
}

/* creates opening quotation mark */
.oval-quotes:before {
    content: "\201C";
    position: absolute;
    z-index: 1;
    top: 20px;
    left: 20px;
    font: 80px/1 Georgia;
    color: #ffed26;
}

/* creates closing quotation mark */
.oval-quotes:after {
    content: "\201D";
    position: absolute;
    z-index: 1;
    bottom: 0;
    right: 20px;
    font: 80px/0.25 Georgia;
    color: #ffed26;
}

.oval-quotes p {
    width: 250px;
    height: 250px;
    padding: 50px 0 0;
    margin: 0 auto;
    text-align: center;
    font-size: 35px;
}

/* creates larger curve */
.oval-quotes p:before {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -30px;
    right: 25%;
    width: 0;
    height: 80px;
    border-right: 200px solid #ffed26;
    background: #ffed26;
    /* need this for webkit - bug in handling of border-radius */
    /* css3 */
    -moz-border-radius-bottomright: 200px 100px;
    -webkit-border-bottom-right-radius: 200px 100px;
    border-bottom-right-radius: 200px 100px;
    /* using translate to avoid undesired appearance in CSS2.1-capabable but CSS3-incapable browsers */
    -moz-transform: translate(0, -2px);
    -webkit-transform: translate(0, -2px);
    -o-transform: translate(0, -2px);
    transform: translate(0, -2px);
}

/* creates smaller curve */
.oval-quotes p:after {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -30px;
    right: 55%;
    width: 180px;
    /* wider than necessary to make it look a bit better in IE8 */
    height: 60px;
    background: #fff;
    /* need this for webkit - bug in handling of border-radius */
    /* css3 */
    -moz-border-radius-bottomright: 40px 50px;
    -webkit-border-bottom-right-radius: 40px 50px;
    border-bottom-right-radius: 40px 50px;
    /* using translate to avoid undesired appearance in CSS2.1-capabable but CSS3-incapable browsers */
    -moz-transform: translate(-30px, -2px);
    -webkit-transform: translate(-30px, -2px);
    -o-transform: translate(-30px, -2px);
    transform: translate(-30px, -2px);
}

.oval-quotes+p {
    position: relative;
    /* part of the IE8 width compromise */
    width: 150px;
    margin: 0 0 2em;
    font-size: 18px;
    font-weight: bold;
}

/* ============================================================================================================================== RECTANGLE-BORDER STYLE WITH CURVE** ============================================================================================================================ */
.rectangle-speech-border {
    position: relative;
    padding: 50px 15px;
    margin: 1em 0 3em;
    border: 10px solid #5a8f00;
    text-align: center;
    color: #333;
    background: #fff;
    /* css3 */
    -moz-border-radius: 20px;
    -webkit-border-radius: 20px;
    border-radius: 20px;
}

/* creates larger curve */
.rectangle-speech-border:before {
    content: "";
    position: absolute;
    z-index: 10;
    bottom: -40px;
    left: 50px;
    width: 50px;
    height: 30px;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: #5a8f00;
    background: transparent;
    /* css3 */
    -moz-border-radius-bottomright: 80px 50px;
    -webkit-border-bottom-right-radius: 80px 50px;
    border-bottom-right-radius: 80px 50px;
}

/* creates smaller curve */
.rectangle-speech-border:after {
    content: "";
    position: absolute;
    z-index: 10;
    bottom: -40px;
    left: 50px;
    width: 20px;
    height: 30px;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: #5a8f00;
    background: transparent;
    /* css3 */
    -moz-border-radius-bottomright: 40px 50px;
    -webkit-border-bottom-right-radius: 40px 50px;
    border-bottom-right-radius: 40px 50px;
}

/* creates a small circle to produce a rounded point where the two curves meet */
.rectangle-speech-border>:first-child:before {
    content: "";
    position: absolute;
    bottom: -40px;
    left: 45px;
    width: 10px;
    height: 10px;
    background: #5a8f00;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
}

/* creates a white rectangle to cover part of the oval border*/
.rectangle-speech-border>:first-child:after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 76px;
    width: 24px;
    height: 15px;
    background: #fff;
}

/* ============================================================================================================================== OVER SPEECH BUBBLE, EMPTY, WITH BORDER (more CSS3)** ============================================================================================================================ */
.oval-speech-border {
    position: relative;
    padding: 70px 30px;
    margin: 1em auto 60px;
    border: 10px solid #f3961c;
    text-align: center;
    color: #333;
    background: #fff;
    /* css3 */
    /*    NOTES:    -webkit-border-radius:240px 140px; // produces oval in safari 4 and chrome 4    -webkit-border-radius:240px / 140px; // produces oval in chrome 4 (again!) but not supported in safari 4    Not correct application of the current spec, therefore, using longhand to avoid future problems with webkit corrects this    */
    -webkit-border-top-left-radius: 240px 140px;
    -webkit-border-top-right-radius: 240px 140px;
    -webkit-border-bottom-right-radius: 240px 140px;
    -webkit-border-bottom-left-radius: 240px 140px;
    -moz-border-radius: 240px / 140px;
    border-radius: 240px / 140px;
}

/* creates larger curve */
.oval-speech-border:before {
    content: "";
    position: absolute;
    z-index: 2;
    bottom: -40px;
    right: 50%;
    width: 50px;
    height: 30px;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: #f3961c;
    margin-right: -10px;
    background: transparent;
    /* css3 */
    -moz-border-radius-bottomright: 80px 50px;
    -webkit-border-bottom-right-radius: 80px 50px;
    border-bottom-right-radius: 80px 50px;
}

/* creates smaller curve */
.oval-speech-border:after {
    content: "";
    position: absolute;
    z-index: 2;
    bottom: -40px;
    right: 50%;
    width: 20px;
    height: 31px;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: #f3961c;
    margin-right: 20px;
    background: transparent;
    /* css3 */
    -moz-border-radius-bottomright: 40px 50px;
    -webkit-border-bottom-right-radius: 40px 50px;
    border-bottom-right-radius: 40px 50px;
}

/* creates a small circle to produce a rounded point where the two curves meet */
.oval-speech-border>:first-child:before {
    content: "";
    position: absolute;
    z-index: 1;
    bottom: -40px;
    right: 50%;
    width: 10px;
    height: 10px;
    margin-right: 45px;
    background: #f3961c;
    /* css3 */
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
}

/* creates a white rectangle to cover part of the oval border*/
.oval-speech-border>:first-child:after {
    content: "";
    position: absolute;
    z-index: 1;
    bottom: -10px;
    right: 50%;
    width: 30px;
    height: 15px;
    background: #fff;
}

/* ============================================================================================================================== OVER THOUGHT BUBBLE, EMPTY, WITH BORDER (more CSS3)** ============================================================================================================================ */
.oval-thought-border {
    position: relative;
    padding: 70px 30px;
    margin: 1em auto 80px;
    border: 10px solid #c81e2b;
    text-align: center;
    color: #333;
    background: #fff;
    /* css3 */
    /*    NOTES:    -webkit-border-radius:240px 140px; // produces oval in safari 4 and chrome 4    -webkit-border-radius:240px / 140px; // produces oval in chrome 4 (again!) but not supported in safari 4    Not correct application of the current spec, therefore, using longhand to avoid future problems with webkit corrects this    */
    -webkit-border-top-left-radius: 240px 140px;
    -webkit-border-top-right-radius: 240px 140px;
    -webkit-border-bottom-right-radius: 240px 140px;
    -webkit-border-bottom-left-radius: 240px 140px;
    -moz-border-radius: 240px / 140px;
    border-radius: 240px / 140px;
}

/* creates the larger circle */
.oval-thought-border:before {
    content: "";
    position: absolute;
    z-index: 10;
    bottom: -40px;
    right: 100px;
    width: 50px;
    height: 50px;
    border: 10px solid #c81e2b;
    background: #fff;
    /* css3 */
    -moz-border-radius: 50px;
    -webkit-border-radius: 50px;
    border-radius: 50px;
}

/* creates the smaller circle */
.oval-thought-border:after {
    content: "";
    position: absolute;
    z-index: 10;
    bottom: -60px;
    right: 50px;
    width: 25px;
    height: 25px;
    border: 10px solid #c81e2b;
    background: #fff;
    /* css3 */
    -moz-border-radius: 25px;
    -webkit-border-radius: 25px;
    border-radius: 25px;
}

展示效果： https://files.cnblogs.com/files/Fooo/14%E7%A7%8D%E7%BA%AFcss3%E5%AF%B9%E8%AF%9D%E6%B0%94%E6%B3%A1%E6%A0%B7%E5%BC%8F%E4%BB%A3%E7%A0%81.zip?t=1758874045&download=true

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