{"id":4573,"date":"2026-01-12T16:51:09","date_gmt":"2026-01-12T09:51:09","guid":{"rendered":"https:\/\/wpdesign.vn\/css-la-gi-huong-dan-tong-quan-tu-co-ban-den-nang-cao\/"},"modified":"2026-05-06T13:52:01","modified_gmt":"2026-05-06T06:52:01","slug":"css-la-gi-huong-dan-tong-quan-tu-co-ban-den-nang-cao","status":"publish","type":"post","link":"https:\/\/wpdesign.vn\/vi\/css-la-gi-huong-dan-tong-quan-tu-co-ban-den-nang-cao\/","title":{"rendered":"CSS L\u00e0 G\u00ec? H\u01b0\u1edbng D\u1eabn T\u1ed5ng Quan T\u1eeb C\u01a1 B\u1ea3n \u0110\u1ebfn N\u00e2ng Cao"},"content":{"rendered":"\n

N\u1ebfu HTML l\u00e0 b\u1ed9 khung n\u1ed9i dung th\u00ec CSS ch\u00ednh l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh di\u1ec7n m\u1ea1o cho website. Vi\u1ec7c l\u00e0m ch\u1ee7 CSS kh\u00f4ng ch\u1ec9 gi\u00fap trang web \u0111\u1eb9p h\u01a1n m\u00e0 c\u00f2n t\u1ed1i \u01b0u \u0111\u01b0\u1ee3c tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 hi\u1ec7u su\u1ea5t v\u1eadn h\u00e0nh. <\/p>\n\n

1. Kh\u00e1i ni\u1ec7m v\u1ec1 CSS<\/h4>\n\n

CSS (Cascading Style Sheets)<\/strong> l\u00e0 ng\u00f4n ng\u1eef quy \u0111\u1ecbnh c\u00e1ch hi\u1ec3n th\u1ecb c\u1ee7a c\u00e1c ph\u1ea7n t\u1eed HTML. N\u00f3 cho ph\u00e9p b\u1ea1n can thi\u1ec7p v\u00e0o m\u1ecdi chi ti\u1ebft th\u1ecb gi\u00e1c nh\u01b0 m\u00e0u s\u1eafc, font ch\u1eef, b\u1ed1 c\u1ee5c v\u00e0 kho\u1ea3ng c\u00e1ch. <\/p>\n\n

V\u00ed d\u1ee5 v\u1ec1 c\u1ea5u tr\u00fac m\u1ed9t \u0111o\u1ea1n m\u00e3 CSS:<\/h6>\n\n
\"\"<\/figure>\n\n

2. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c s\u1eed d\u1ee5ng CSS<\/h4>\n\n

C\u00f3 3 c\u00e1ch ch\u00ednh \u0111\u1ec3 \u00e1p d\u1ee5ng CSS v\u00e0o website:<\/p>\n\n

    \n
  • External CSS (D\u00f9ng file ri\u00eang): <\/strong>L\u01b0u m\u00e3 v\u00e0o file .css<\/code> v\u00e0 g\u1ecdi v\u00e0o HTML qua th\u1ebb <link><\/code>. \u0110\u00e2y l\u00e0 c\u00e1ch chu\u1ea9n nh\u1ea5t. <\/li>\n\n\n\n
  • Internal CSS (Trong trang):<\/strong> Vi\u1ebft trong th\u1ebb <style><\/code> \u0111\u1eb7t t\u1ea1i ph\u1ea7n <head><\/code>.<\/li>\n\n\n\n
  • Inline CSS (Tr\u1ef1c ti\u1ebfp):<\/strong> Vi\u1ebft th\u1eb3ng v\u00e0o thu\u1ed9c t\u00ednh c\u1ee7a th\u1ebb HTML.\n
      \n
    • V\u00ed d\u1ee5:<\/em> <p style=\"color: red;\">\u0110o\u1ea1n v\u0103n n\u00e0y c\u00f3 m\u00e0u \u0111\u1ecf.<\/p><\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n

      3. Nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ed1t l\u00f5i c\u1ea7n n\u1eafm v\u1eefng<\/h4>\n\n

      Box Model (M\u00f4 h\u00ecnh h\u1ed9p)<\/h6>\n\n

      M\u1ecdi ph\u1ea7n t\u1eed web \u0111\u1ec1u \u0111\u01b0\u1ee3c xem nh\u01b0 m\u1ed9t chi\u1ebfc h\u1ed9p. Hi\u1ec3u r\u00f5 Box Model l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 c\u0103n ch\u1ec9nh v\u1ecb tr\u00ed ch\u00ednh x\u00e1c. <\/p>\n\n

      V\u00ed d\u1ee5 minh h\u1ecda:<\/h6>\n\n
      \"\"<\/figure>\n\n
      B\u1ed1 c\u1ee5c hi\u1ec7n \u0111\u1ea1i v\u1edbi Flexbox<\/h6>\n\n

      Flexbox gi\u00fap b\u1ea1n d\u00e0n h\u00e0ng ho\u1eb7c c\u0103n gi\u1eefa c\u00e1c ph\u1ea7n t\u1eed c\u1ef1c k\u1ef3 nhanh ch\u00f3ng thay v\u00ec d\u00f9ng c\u00e1c k\u1ef9 thu\u1eadt c\u0169 nh\u01b0 float<\/strong><\/code>.<\/p>\n\n

      V\u00ed d\u1ee5 c\u0103n gi\u1eefa m\u1ed9t ph\u1ea7n t\u1eed:<\/h6>\n\n
      \"\"<\/figure>\n\n
      Responsive Design (T\u01b0\u01a1ng th\u00edch thi\u1ebft b\u1ecb)<\/h6>\n\n

      S\u1eed d\u1ee5ng Media Queries<\/strong> \u0111\u1ec3 thay \u0111\u1ed5i giao di\u1ec7n khi m\u00e0n h\u00ecnh nh\u1ecf \u0111i (nh\u01b0 tr\u00ean \u0111i\u1ec7n tho\u1ea1i).<\/p>\n\n

      V\u00ed d\u1ee5 \u1ea9n m\u1ed9t c\u1ed9t khi xem tr\u00ean Mobile:<\/h6>\n\n
      \"\"<\/figure>\n\n

      4. Hi\u1ec7u \u1ee9ng v\u00e0 Chuy\u1ec3n \u0111\u1ed9ng<\/h4>\n\n

      CSS gi\u00fap t\u1ea1o ra c\u00e1c t\u01b0\u01a1ng t\u00e1c m\u01b0\u1ee3t m\u00e0 gi\u00fap website sinh \u0111\u1ed9ng h\u01a1n.<\/p>\n\n

      V\u00ed d\u1ee5 hi\u1ec7u \u1ee9ng khi di chu\u1ed9t (Hover):<\/h6>\n\n
      \"\"<\/figure>\n\n

      5. L\u1ed9 tr\u00ecnh h\u1ecdc t\u1eadp \u0111\u1ec1 xu\u1ea5t<\/h4>\n\n
        \n
      1. L\u00e0m quen v\u1edbi Selector:<\/strong> C\u00e1ch ch\u1ecdn ph\u1ea7n t\u1eed theo Class (.<\/code>), ID (#<\/code>) ho\u1eb7c t\u00ean th\u1ebb.<\/li>\n\n\n\n
      2. H\u1ecdc v\u1ec1 Box Model:<\/strong> \u0110\u1ec3 hi\u1ec3u c\u00e1ch ki\u1ec3m so\u00e1t kh\u00f4ng gian v\u00e0 k\u00edch th\u01b0\u1edbc.<\/li>\n\n\n\n
      3. Th\u1ef1c h\u00e0nh Layout:<\/strong> T\u1eadp trung s\u00e2u v\u00e0o Flexbox v\u00e0 Grid.<\/li>\n\n\n\n
      4. H\u1ecdc Responsive:<\/strong> S\u1eed d\u1ee5ng Media Queries \u0111\u1ec3 t\u1ed1i \u01b0u cho Mobile.<\/li>\n\n\n\n
      5. Th\u1ef1c h\u00e0nh th\u1ef1c t\u1ebf:<\/strong> Th\u1eed x\u00e2y d\u1ef1ng l\u1ea1i m\u1ed9t giao di\u1ec7n \u0111\u01a1n gi\u1ea3n (nh\u01b0 trang blog) \u0111\u1ec3 hi\u1ec3u c\u00e1ch ph\u1ed1i h\u1ee3p c\u00e1c thu\u1ed9c t\u00ednh.<\/li>\n<\/ol>\n\n

        L\u1eddi k\u1ebft:<\/strong> CSS l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng c\u1ea7n nhi\u1ec1u th\u1eddi gian th\u1ef1c h\u00e0nh. Thay v\u00ec h\u1ecdc thu\u1ed9c l\u00f2ng m\u1ecdi thu\u1ed9c t\u00ednh, b\u1ea1n n\u00ean b\u1eaft \u0111\u1ea7u t\u1eeb nh\u1eefng d\u1ef1 \u00e1n nh\u1ecf v\u00e0 h\u1ecdc c\u00e1ch tra c\u1ee9u t\u00e0i li\u1ec7u (nh\u01b0 MDN ho\u1eb7c W3Schools) khi c\u1ea7n thi\u1ebft. <\/p>\n","protected":false},"excerpt":{"rendered":"

        N\u1ebfu HTML l\u00e0 b\u1ed9 khung n\u1ed9i dung th\u00ec CSS ch\u00ednh l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh di\u1ec7n m\u1ea1o cho website. […]<\/p>\n","protected":false},"author":4,"featured_media":4572,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-4573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publishing"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/4573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/comments?post=4573"}],"version-history":[{"count":1,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/4573\/revisions"}],"predecessor-version":[{"id":4579,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/posts\/4573\/revisions\/4579"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/media\/4572"}],"wp:attachment":[{"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/media?parent=4573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/categories?post=4573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpdesign.vn\/vi\/wp-json\/wp\/v2\/tags?post=4573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}