PatternMeaningDescribed in section

*Matches any element.Universal
selector
EMatches any E element (i.e., an element of type E).Type
selectors
E FMatches any F element that is a descendant of
an E element.Descendant
selectors
E > FMatches any F element that is a child of
an element E.Child selectors
E:first-childMatches element E when E is the first
child of its parent.
The :first-child pseudo-class
E:link
E:visited Matches element E if E is the source
anchor of a hyperlink of which the target is not yet visited (:link)
or already visited (:visited).
The link pseudo-classes
E:active
E:hover
E:focus Matches E during certain
user actions.
The dynamic pseudo-classes
E:lang(c) Matches element of type E if it is in (human) language c
(the document language specifies how language is determined).
The :lang() pseudo-class
E + FMatches any F element immediately preceded by
a sibling element E.Adjacent selectors
E[foo]Matches any E element with the
"foo" attribute set (whatever the value).
Attribute selectors
E[foo="warning"]Matches any E element whose
"foo" attribute value is exactly equal to "warning".
Attribute selectors
E[foo~="warning"]Matches any E element whose
"foo" attribute value is a list of space-separated values, one of
which is exactly equal to "warning".
Attribute selectors
E[lang|="en"]Matches any E element whose
"lang" attribute has a hyphen-separated list of values
beginning (from the left) with "en".
Attribute selectors
DIV.warningLanguage specific. (In HTML, the same
as DIV[class~="warning"].)
Class selectors
E#myidMatches any E element with ID
equal to "myid".ID selectors
2025年国内旅游收入预计将突破历史新高,以下是综合多方数据的预测与分析:
一、核心数据预测

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