我一直试图摆脱顶级＆amp;该标题的右边距。我试过保证金：0＆amp;保证金：无 它没有奏效。任何建议将不胜感激。
p.title {
font-family: 'Germania One';
font-style: normal;
color: #FFF;
font-size: 150px;
Position:absolute;
width:100%;
z-index:1000;
text-align:left;
margin-top: 300px;
margin-bottom: 0px;
margin-left:200px;
}
@media (min-width:320px) and (max-width:425px) {
p .title{
position:none; margin: 0 ;
}
答案 0 :(得分：2)
媒体查询中的选择器无法覆盖媒体查询之前的选择器，因为它们不相同。将媒体查询中的选择器从<?php //Shopping Cart (./cart.php)
//GET -> id of the product.
if (isset($_GET['articulo'])) {
$id_tutorial = $_GET['articulo'] ?: '';
//If the session is defined for Shop Cart.
if (isset($_SESSION['carrito'])) {
//Get data from session.
$arreglo = $_SESSION['carrito'];
$encontro = false;
for ($i=0; $i<count($arreglo); $i++) {
//checking if product has already been added to the cart.
if ($arreglo[$i]['Id'] == $_GET['articulo']) {
$encontro = true;
}
}
//If find product is false, update de array session (Shop cart).
if ($encontro == false) {
//Reset
$titulo = "";
$precio = 0;
$icon = "";
//Get data from DB.
$stmt = $c->prepare("SELECT titulo,precio,icon FROM tutoriales WHERE page=? and status=1");
$stmt->bind_param("i",$_GET['articulo']);
$stmt->execute();
$stmt->store_result();
if ($stmt->num_rows > 0) {
$stmt->bind_result($titulo,$precio,$icon);
while ($stmt->fetch()) {
//New data for array.
$datosnuevos = ['Id' => $_GET['articulo'], 'Titulo' => $titulo, 'Precio' => $precio, 'Icon' => $icon, 'Cantidad' => 1 ];
//array_push($arreglo, $datosnuevos);
$arreglo[] = $datosnuevos;
$_SESSION['carrito'] = $arreglo;
//Count total of products added to the cart.
$data = $_SESSION['carrito'];
$value_carrito = count($data);
$_SESSION['compras'] = $value_carrito;
} $stmt->close();
} else {
$stmt->close();
}
}
} else { //If session is not defined for Shop Cart, that is to say that the card is in 0 productos.
//Reset.
$titulo = "";
$precio = 0;
$icon = "";
//Get data from DB.
$stmt = $c->prepare("SELECT titulo,precio,icon FROM tutoriales WHERE page=? and status=1");
$stmt->bind_param("i",$_GET['articulo']);
$stmt->execute();
$stmt->store_result();
if ($stmt->num_rows > 0) {
$stmt->bind_result($titulo,$precio,$icon);
while ($stmt->fetch()) {
//Started the array for Shop Cart.
$arreglo[] = ['Id' => $_GET['articulo'], 'Titulo' => $titulo, 'Precio' => $precio, 'Icon' => $icon, 'Cantidad' => 1 ];
$_SESSION['carrito'] = $arreglo;
//Count total of products added to the cart.
$data = $_SESSION['carrito'];
$value_carrito = count($data);
$_SESSION['compras'] = $value_carrito;
} $stmt->close();
} else {
$stmt->close();
}
}
}
?>
更改为p .title，它将起作用。
p.title中的（space combinator）表示选择器的第二部分是第一部分的后代，而链接选择器没有空格意味着选择器适用于相同的元素。
因此，CSS selector会选择包含p.title类的任何<p>标记，而title会选择类p .title的任何元素作为{title的后代{1}}元素。
以下是CSS combinators的列表。
答案 1 :(得分：0)
您在媒体查询中写了p .title（带空格）而不是p.title。
答案 2 :(得分：0)
你写了一个错字：
@media (min-width:320px) and (max-width:425px) {
p.title{ /* No Space */
position:none; margin: 0 ;
}
}
答案 3 :(得分：0)
//从p .title {}中删除空格并将媒体查询添加为 -
@media（min-width：320px）和（max-width：425px）{
p.title{
position:none;
margin-top: 0;
margin-right: 0;
}
}