我什么也不懂，诚恳的在此请教大神，请问下面代码中在哪修改能让文章标题字体加粗。


/* CSS Reset */

body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form, fieldset,input,textarea,p,blockquote,th,td { margin:0; padding:0; }
table { border-collapse:collapse; border-spacing:0; }
fieldset,img { border:0; }
address,caption,cite,code,dfn,em,strong,th,var { font-style:normal; font-weight:normal; }
ol,ul { list-style:none; }
caption,th { text-align:left; }
h1,h2,h3,h4,h5,h6 { font-size:100%; font-weight:normal; }
abbr,acronym { border:0; }
textarea, input{resize: none;}
button {overflow:visible;width:auto;margin:0;padding:0;border:0 none;outline:none;}

/* Public */



body{font-size:14px;color:#503e2c;background-color:#ece5d8;}
.content-block{width:940px;margin:0 auto;padding:0 10px 0 10px;}
a{font-weiqht:bold:color:#000000;text-decoration:none;}
a:hover{color:#330000;}
.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;}
.clearfix{display:inline-block;}
/* Hide from IE Mac */
.clearfix {display:block;}
textarea, input[type=text], input[type=email], input[type=password] {border:1px solid #daceb7;box-shadow:0 2px 1px rgba(0,0,0,.05) inset, 0 1px 0 rgba(255,255,255,1);border-radius:4px; -webkit-appearance:none;line-height:100%;}
textarea:focus, input[type=text]:focus, input[type=email]:focus, input[type=password]:focus {outline:none; border:1px solid #996633;box-shadow:0 0 4px rgba(153,102,51,0.6);}

/* Head */

.head{background: #eed9b4 url(img/web_icon.png) repeat-x 0 -477px;}
.head .content-block{height:180px; background:url(img/web_logo.png) no-repeat 0 0;}
.head .logo {float: left; }
.head .logo a {display: block; height: 180px; width: 250px; text-indent: -999999px;}

.hidden {display:none;}
.login {display:none;}
.head .userbar{background:#d95338;float:right;box-shadow:0 1px 2px rgba(0,0,0,.2);line-height:100%;padding:3px}
.head .userbar a{color:#fff;cursor:pointer}
.head .login,.head .logout{border:1px dashed #eeb3a8;border-top:none;padding:6px 15px}
.head .logout{padding:8px 15px 10px}
.head a.username{font-weight:bold}
.head a.exit{color:#e79180;padding:0 10px 0 4px}
.head a.exit:hover{color:#fff}
.head .bti{opacity:0.7;display:inline-block;width:20px;height:20px;vertical-align:middle;_margin-left:6px}
.head a:hover .bti{opacity:1}
.head .message .bti{background:url(img/web_icon.png) no-repeat -80px 0}
.head .code .bti{background:url(img/web_icon.png) no-repeat -100px 0}
.head #logintop {margin: 0 10px 0 0;}
.head a.message, .head a.message:hover {text-decoration:none;}
.head #unread_messages_count{display:inline-block;position:absolute;font-size:10px;color:#fff;background:#fe8f00;font-weight:bold;margin:-5px 0 0 -10px;padding:0 2px 0 2px; box-shadow:0 1px 2px rgba(0,0,0,.2);border-radius:2px;}


/* Menu, Search */

.menu-bar{height:40px; background: #af865a url(img/web_icon.png) repeat-x 0 -657px;}
.menu{z-index:1000;position:absolute}
.menu ul li{text-align:center;font-size:21px;display:inline;float:left;width:98px;line-height:40px;text-shadow:0 1px 1px rgba(0,0,0,.2)}
.menu a{display:block;color:#FFF}
.menu a:hover{color:#fff45c}
.menu .menuout{width:98px;height:40px;overflow:hidden;cursor:pointer}
.menu .submenu{font-size:14px;background: #af865a url(img/web_icon.png) repeat-x 0 -657px;}
.menu .submenutitle{background:url(img/web_icon.png) no-repeat 0 -135px}
#highlight{font-weight:bold;box-shadow:0 2px 4px rgba(0,0,0,.2) inset;background:#5b9c0f}

.search{float:right;padding-top:8px;}
.search input{vertical-align:middle;border:0;padding:3px;}
.search .input-box{width:150px;}
.search .button-box{background:#e3d2b4;}

/* Left */
.main .baidu-sponsor {padding:0 0 20px 0;clear: both;}
.main .col1{width:620px;float:left;margin:20px 20px 0 0;position:relative;}
.main .col1 .block{background-color:#fff;clear:both;padding:18px 20px;}
.main .col1 .shadow {background:url(img/web_icon.png) no-repeat 0 -280px;height:20px;width:610px;}
.author{font-size:15px;vertical-align:middle;line-height:100%;margin:0 0 17px;}
.author img{height:30px;width:30px;vertical-align:middle;padding:0 10px 0 0;}
.thumb{margin:10px 0;}
.tags {margin:10px 0 0 0;}
.tags .bti{display:inline-block;width:20px;height:20px;background:url(img/web_icon.png) no-repeat -180px 0;vertical-align:middle}
.content{word-break:break-all;line-height:160%;}
.col1 .content a, .col1 .content a:hover {color: #503e2c; text-decoration: none; cursor: text;}
.col1 .recommend h3 {height:40px;width:114px;display:inline-block;background:url(img/web_icon.png) no-repeat 0 -59px;margin:15px 0;font-size:16px;text-align: center;line-height: 33px;color: #FFF;}

/* vote button */

.bar{margin:15px 0 0 0;}
.up,.down,.comment,.detail,.bar a{float:left;display:block;height:28px;line-height:28px;width:80px;text-indent:36px;}
.bar a{border-radius:2px;border:1px solid #dfd5cb;color:#9e8c7b;background-color:#FFF;}
.bar a:hover{background-color:#FFF;border-radius:2px;border:1px solid #bfb1a3;box-shadow:0 1px 2px #e1e1e1;}
.bar a:active,.bar .voted,.bar a.voted:hover,.bar a.voted:active{background-color:#f3efe7;border-radius:2px;border:1px solid #cabdb0;box-shadow:0 1px 2px #d6c9bc inset;color:#bf4131;}
.bar .voted,.bar a.voted:hover,.bar a.voted:active{cursor:default;text-decoration:none;}
.up a{width:80px;background-image:url(img/web15.png);background-repeat:no-repeat;background-position:0 0;}
.up a:hover{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:0 -30px;}
.up a:active,.up .voted,.up a.voted:hover,.up a.voted:active{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:0 -60px;}
.down { margin: 0 282px 0 10px;}
.down a{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-80px 0;}
.down a:hover{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-80px -30px;}
.down a:active,.down .voted,.down a.voted:hover,.down a.voted:active{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-80px -60px;}
.comment a{width:80px;background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-160px 0;}
.comment a:hover{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-160px -30px;}
.comment a:active{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-160px -60px;}
.detail {width:30px;margin-left:10px;}
.detail a{width:30px;background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-240px 0;text-indent:0;}
.detail a:hover{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-240px -30px;}
.detail a:active{background-image:url(img/web15.png);background-repeat:no-repeat;background-position:-240px -60px;}

#vote-ani{line-height:0;position:absolute;display:none;font-weight:700;margin:0;padding:0;}
#vote-ani.pos{color:red;}
#vote-ani.neg{color:blue;}

/* comments */

.comments{font-size:12px;line-height:18px;border-top-width:2px;border-top-style:solid;border-top-color:#dfd5cb;margin:20px 0 0;}
.comment-block{border-bottom:1px dotted #dfd5cb;padding:10px 0;}
.comment-block .avatar{width:35px;float:left;}
.comment-block .avatar img{height:20px;width:20px;}
.comment-block .reply{width:470px;float:left; word-break:break-all;}
.comment-block .report{width:60px;float:left;text-align:right;color:#d7d0c6;}
.comment-block a.link{visibility:hidden;}
.comment-block:hover a.link{visibility:visible;}
.input-block{clear:both;padding:20px 0 0;}
.input-block textarea{width:550px;height:28px;font-size:12px;padding:5px;color:#54412E;}
.input-block textarea.original {color:#999;}
.input-block .row {padding:10px 0 0 0;height:37px;line-height:35px;}
.comments .login-block a, .comments #comment_submit, .comments #reply_submit{width:56px;height:30px;line-height:30px;margin:0 10px 0 0;}
.comments .login-block input {width:100px;padding:5px;margin:0 10px 0 0;}

/* User */
.userlogin a{float: left;display: block;margin: 0 15px 0 0;}
.comment-block .anomynous {color:#9b8878;}
.comment-block .hostname a, .comment-block .hostname a:hover{color:#bf4131;}
.comment-block .manager {color:black;font-weight:bold;}
.comment-block .spam {color:#bbb;}

/* Next Pages */

.pagebar{margin:0 0 10px 0}
.pagebar a, .pagebar .current, .pagebar .dots, .pagebar a.next{height:35px; line-height:35px;color:#6a5c4c;display:inline-block;vertical-align: middle;padding:0 15px; }
.pagebar .prev .bti{height:20px;width:20px;background:url(img/web_icon.png) no-repeat;display:inline-block; margin:7px 0 0 0;}
.pagebar .prev .bti{background-position:-140px 0}
.pagebar .current { font-weight:bold;border:1px dashed #ad956f;background:#e8e0d1;}
.pagebar a:hover {background:#e3d9c7;}


/* Right */

.main .col2{float:left;width:300px;position:relative;margin:20px 0;}
.main .col2 .shadow{background:url(img/web_icon.png) no-repeat 0 -260px;height:20px;width:240px;margin:0 0 0 60px;}
.main .col2 .sponsor{background-color:#fff;}
.main .col2 a:hover {color:#d95338;}
.main .col2 h3{ line-height:100%;padding:10px;border-bottom-width:1px;border-bottom-style:dashed;border-bottom-color:#ece5d8;}
.main .col2 .content {padding:10px;}

.microblog, .tagsblock, .sitelink, .appblock{background-color:#fff;}
.tagsblock a{display:inline-block;margin:0 4px 0 0;}
.sitelink a {display: inline-block; width:48%;}
.col2 .microblog .content {padding:10px 5px;}
.microblog a{width:24%;display:inline-block;text-align:center;}
.microblog span{display:block;height:29px;width:57px;background:url(img/web_icon.png) repeat-x -152px -139px;line-height:33px;margin:0 auto;color:#cc6600;font-size:16px;}
.microblog span em {font-size: 12px;}

#box{float:left; position:relative; width:300px;}
.div1{}
.div2{position:fixed;_position:absolute;top:0;z-index:300;}

.smartphone {width:300px;height:80px;background:#fff;overflow: hidden;}
.smartphone ul {padding:0px; margin:0px;}
.smartphone ul li{float:left; list-style:none; }
.smartphone ul li.select{display:block;}
.smartphone .imgnum{position:relative;float:right;margin:-16px 0 0 0; margin-top:-14px\9; _margin-top:-18px;}
.smartphone .imgnum span{font-size:12px; color:#FFF; cursor:pointer; background-color:#999; padding:0 6px;}
.smartphone .imgnum span.onselect{background-color:#ff9900;}

.toolbar{clear:both;width:300px;background:#fff;text-shadow:0 1px 0 rgba(255,255,255,1);box-shadow:0 1px 1px rgba(0,0,0,.3);
background: linear-gradient(top,#fff,#f4efe7);
background: -moz-linear-gradient(top,#fff,#f4efe7);
background: -o-linear-gradient(top,#fff,#f4efe7);
background: -webkit-gradient(linear,left top,left bottom,from(#fff),to(#f4efe7));
background: -webkit-linear-gradient(top,#fff,#f4efe7);}
.toolbar a {display:inline-block; width:49%;padding:10px 0; text-align:center;}
.toolbar .back {border-right-width:1px; border-right-style:solid; border-right-color:#ebe9e4;}

/* Foot */

.foot{clear:both; text-align:center; padding:15px 0 0 0; height:50px;}
.copyright {padding: 5px 0 0 0;color: #ece5d8;}
.copyright a {color: #ece5d8;}
.copyright a:hover{ color: #FFF;text-decoration: underline;}

/* New Post */
.new_article textarea{font-size:14px;color:#54412E;width:560px;height:160px}
.new_article textarea.original{ color:#999; }
.new_article .tagbox,.new_article .buttonbox,.new_article .picbox,.new_article .optionbox{padding:10px 0 0 0; font-size:12px}
.new_article .tagbox label,.new_article .picbox label,.new_article .optionbox label{display:block;float:left;width:50px; }
.new_article .buttonbox input {display:inline-block;width:80px;height:30px;text-align:center;}
.postsuccess{line-height:180%;min-height: 300px;}
.postsuccess h2{font-size:32px;padding:20px 0;}
.postsuccess strong{color:#F63;font-size:18px;}

/* Tag Cloud */

#tagcloud span a{line-height:38px;text-decoration:none;}
#tagcloud span{padding-right:3px;}
.tag_level1 a{color:#fff;font-size:38px;font-weight:800;background:#91c21c;}
.tag_level2 a{font-size:28px;color:#f79e1c;padding:1px;}
.tag_level3 a{font-size:20px;}
.tag_level4 a{font-size:14px;}

/* Pop-up login, register */

#login-form{top:50%;left:50%;z-index:1002;box-shadow:0 4px 16px rgba(0,0,0,.6);width:540px;display:none;}
#login-form .col1{float:left;width:250px;height:235px;background:#fff;padding:25px;}
#login-form .col1 .inputbox{height:156px}
#login-form .col1 .inputbox label{display:block;line-height:100%;padding:0 0 8px}
#login-form .col1 .inputbox input{vertical-align:middle;font-size:18px;width:94%;margin:0 0 15px;padding:5px}
#login-form .col1 .error {outline:none; border:1px solid #e60012;background: url(img/web_icon.png) no-repeat 0px -109px;box-shadow:0 1px 2px rgba(0,0,0,.1) inset;}

#login-form .col1 .optionbox{float:left}
#login-form .col1 button{float:right;width:72px;height:38px;line-height:38px;_height:33px;_line-height:33px;}

#login-form .col2{float:left;width:189px;background:#f7f5f2;height:235px;padding:25px;border-left:1px dashed #d6cab7;}
#login-form .col2 .intro{height:156px;line-height:170%}
#login-form .col2 .intro a{color:#503e2c;text-decoration:underline}
#login-form .col2 a.button{width:70px;height:36px;line-height:36px;}

#login-form a.close,#suggest-form a.close, #report-form a.close{display:block;height:45px;width:45px;position:absolute;cursor:pointer;}
#login-form a.close {margin:0 0 0 495px;}
#suggest-form a.close {margin:0 0 0 495px;}
#report-form a.close {margin:0 0 0 105px;}
#login-form .close .bti,#suggest-form .close .bti, #report-form .close .bti{height:20px;width:20px;display:inline-block;background:url(img/web_icon.png) no-repeat -120px 0;opacity:0.55;position:relative;margin:12px;}
#login-form a.close:hover .bti,#suggest-form a.close:hover .bti, #report-form a.close:hover .bti{opacity:1}

/* Pop-up suggest, report */

#suggest-form{top:50%;left:50%;z-index:1002;box-shadow:0 4px 16px rgba(0,0,0,.6);width:540px;background:#fff;display:none;}
#suggest-form .form-block{padding:20px;line-height:160%;}
#suggest-form .form-block textarea{width:96%;font-size:14px;height:100px;margin:0 0 8px;padding:5px}
#suggest-form h1,#login-form h1{font-size:18px;font-weight:700;margin:0 0 15px}
#suggest-form button{width:56px;height:30px;line-height:30px;}

#report-form{position:absolute;z-index:1000;top:0;left:0;width:150px;box-shadow:0 2px 4px rgba(0,0,0,.2);background:#fff;border:1px solid #cbcbcb;display:none;}
#report-form .form-block{padding:20px;line-height:140%;}
#report-form strong{font-weight:bold;display:block;margin:0 0 8px}
#report-form .form-block label{display:block;cursor:pointer}
#report-form button {margin:6px 0 0;width:56px;height:30px;}

.brown, #report-form button, #suggest-form button, .comments .login-block a, .comments #comment_submit, .comments #reply_submit, #login-form .col1 button{font-size:14px;font-weight:bold;text-align:center;color:#6a5c4c;background:#f1ede3;background:-moz-linear-gradient(top, #f7f3ee, #f1ede3);background:-webkit-linear-gradient(top,#f7f3ee,#f1ede3);border:1px solid #c6baa2;border-radius:3px;cursor:pointer;display:inline-block;}
.brown:hover, #report-form button:hover, #suggest-form button:hover, .comments .login-block a:hover, .comments #comment_submit:hover, .comments #reply_submit:hover, #login-form .col1 button:hover{color:#503e2c;background:#fff;background:-moz-linear-gradient(top, #fff, #f7f3ee);background:-webkit-linear-gradient(top,#fff,#f7f3ee);border:1px solid #a39475;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.brown:active, #report-form button:active, #suggest-form button:active, .comments .login-block a:active, .comments #comment_submit:active, .comments #reply_submit:active, #login-form .col1 button:active{color:#503e2c;background:#e7e2d6;border:1px solid #a39475;box-shadow:0 1px 2px rgba(0,0,0,.2) inset;}

.bule, #login-form .col2 a.button{font-size:14px;font-weight:bold;text-align:center;color:#FFF;background:#6ba1fa;background:-moz-linear-gradient(top, #6ba1fa, #417bd8);background:-webkit-linear-gradient(top,#6ba1fa,#417bd8);border:1px solid #417bd8;border-radius:3px;cursor:pointer;display:inline-block;}
.bule:hover, #login-form .col2 a.button:hover{background:#80b5fb;background:-moz-linear-gradient(top, #80b5fb, #599df2);background:-webkit-linear-gradient(top,#80b5fb,#599df2);border:1px solid #417bd8;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.bule:active{background:#4787ed;border:1px solid #417bd8;box-shadow:0 1px 2px rgba(0,0,0,.2) inset;}

/* tip-twitter */

.tip-twitter { z-index:1000;text-align:left;padding:5px 10px;max-width:300px;font-size:12px;color:#fff;line-height:18px;background-color:#333;}
.tip-twitter a, .tip-twitter .anomynous { color: #CCC;}
.tip-twitter .tip-arrow-top {margin-top:-5px;margin-left:-5px;top:0;left:50%;width:9px;height:5px;background:url(img/web_icon.png) no-repeat 0 -100px;}
.tip-twitter .tip-arrow-right {margin-top:-4px;margin-left:0;top:50%;left:100%;width:5px;height:9px;background:url(img/web_icon.png) no-repeat -9px -100px;}
.tip-twitter .tip-arrow-bottom {margin-top:0;margin-left:-5px; top:100%;left:50%;width:9px;height:5px;background:url(img/web_icon.png) no-repeat -18px -100px;}
.tip-twitter .tip-arrow-left {margin-top:-4px;margin-left:-5px;top:50%;left:0;width:5px;height:9px;background:url(img/web_icon.png) no-repeat -27px -100px;}
.tip-twitter .clearfix .reply{float:none;padding:5px;}
.tip-twitter .clearfix .avatar{ display:none;}
html>body tip-twitter .clearfix .reply{width:auto;}
.tip-twitter .report{display:none;}

/* History */

.history-block{background:#FFF;width:300px;}
.history-block .month {padding:10px;background:#77b8ee;box-shadow:0 2px 1px rgba(0,0,0,0.1);color:#fff;}
.history-block .month select{font-size:14px;}
.history-block .week{font-size:10px;color:#7d7d7d;padding:0 10px;}
.history-block .week span{height:26px;width:40px;text-align:center;line-height:26px;display:inline-block;}
.history-block .day {padding:0 0 10px 10px;}
.history-block .day a{float:left;height:24px;width:40px;line-height:24px;text-align:center;color:#503e2c;border-radius:4px;}
.history-block .day a:hover{background:#ebebeb;color:#000;}
.history-block .day a.today{color:#fff;background:#77b8ee;font-weight:bold;text-shadow:0 1px 0 rgba(0,0,0,.2);box-shadow:0 1px 0 rgba(0,0,0,0.2) inset;}
.history-block .day .on,.history-block .day .off{background:#fff}
.history-block .day .off a, .history-block .day .noart{color:#ebebeb;cursor:default;}
.history-block .day .off a:hover{color:#503e2c;cursor:default;}

.col1 .history-nv{background:#fff;padding:15px; font-size:16px;}
.col1 .history-nv .post-number{background-color:#77b8ee;color:#FFF;font-weight:bold;padding:2px 10px 2px 9px;margin:0 6px;border-radius:40px;text-shadow:0 1px 0 rgba(0,0,0,.2);box-shadow:0 1px 0 rgba(0,0,0,0.2) inset;}


/* sign in */

.sign {}
.sign .logo { padding: 80px 0 10px 0; }
.sign .logo a{background:url(img/web_icon.png) no-repeat 0 -188px;height: 72px;width:250px;display:block;margin: 0px auto auto;}
.sign .block {width: 250px;padding:20px;margin:0 auto;text-shadow:0 1px 0 rgba(255,255,255,.6);}
.sign .note { line-height: 180%; margin: 20px 0 0 0; text-align: center;}
.sign .note a { text-decoration: underline;}
.sign #reginfo {display:none;}

.sign label , .sign #remember_me {display: none;}
.sign input { padding:9px;width:230px;font-size:14px;margin:0 0 15px 0;}
.sign #password, .sign #user_password_confirmation {font-family: Verdana, Geneva, sans-serif;}
.sign input:-moz-placeholder { color: #e6dfd5; }
.sign input::-webkit-input-placeholder{ color:#e6dfd5; }
.sign .placeholder {color: #e6dfd5;}
.sign button, .sign .notify-success a {font-size:14px;padding:9px;width:100%;background-color:#f1ede3; display: inline-block; border-radius:4px;box-shadow:0 1px 0 rgba(255,255,255,1) inset, 0 1px 1px rgba(0,0,0,0.05);border: 1px solid #b6a391;cursor:pointer; color:#503e2c;text-shadow:0 1px 0 rgba(255,255,255,1);}
.sign button:hover, .sign .notify-success a:hover {color:#814d1a;background-color:#feda71;border: 1px solid #d6982f;box-shadow:0 1px 0 rgba(255,255,255,0.5) inset, 0 1px 1px rgba(0,0,0,0.2);}
.sign button:active, .sign .notify-success a:active {box-shadow:0 2px 1px rgba(0,0,0,0.1) inset}
.sign .notify-success a {width:40%;}

.sign .notify-error{color:#ff3a00;text-align: center;margin:0 0 20px 0;}
.sign .notify-success {background-color:#ece5d8;position:absolute;z-index:1000;display:block;width:250px;height:310px;padding:60px 100px 0 0;font-size:14px;text-align:center;}
.sign .notify-success p {line-height:160%;margin:0 0 20px 0;}
.sign #insertinvitation_code, .sign #insertlogin, .sign #insertemail, .sign #insertp1, .sign #insertp2 {display:block; color:#9b8878; font-size:12px;clear:right; float:right; position:absolute; margin:-42px 0 0 260px;
_margin:9px 0 0 9px; /* for IE6 */ }
.sign .verifi-success, .sign .verifi-failed {display:inline-block; vertical-align:middle; height:20px; width:20px; margin:0 4px 0 0;}
.sign .verifi-success {background:url(img/web_icon.png) no-repeat -200px 0;}
.sign .verifi-failed {background:url(img/web_icon.png) no-repeat -220px 0;}