/* ============================================================
   k04 蓝调体育门户模板 · 自包含响应式样式表
   浅色蓝调 + 琥珀高亮，复刻爱体育类版式；无外部依赖
   ============================================================ */
:root{
    --k04-blue:#0d6efd; --k04-blue-deep:#2f65d4; --k04-blue2:#417fff;
    --k04-amber:#ffc107; --k04-amber-deep:#e0a800;
    --k04-ink:#1a1a1a; --k04-body:#444; --k04-muted:#6c757d;
    --k04-line:#e8ecf3; --k04-panel:#f8f9fa; --k04-panel-2:#eef1f6;
    --k04-dark:#111827; --k04-dark2:#1f2937; --k04-bg:#fff;
    --k04-radius:14px; --k04-shadow:0 8px 24px rgba(16,40,90,.08);
    --k04-maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--k04-ink);background:var(--k04-bg);line-height:1.65;font-size:16px}
a{color:inherit;text-decoration:none;transition:.25s}
a:hover{color:var(--k04-blue)}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none}
h1,h2,h3,h4,h5{line-height:1.35;font-weight:700;color:var(--k04-ink)}
.container,.k04-container{width:100%;max-width:var(--k04-maxw);margin:0 auto;padding:0 20px}
.k04-main{display:block}

/* ===== 按钮 ===== */
.k04-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 26px;border-radius:10px;font-weight:700;font-size:16px;line-height:1;cursor:pointer;border:0;text-decoration:none;transition:.3s}
.k04-btn-blue{background:var(--k04-blue2);color:#fff}
.k04-btn-blue:hover{background:var(--k04-blue-deep);color:#fff;box-shadow:0 6px 16px rgba(65,127,255,.35)}
.k04-btn-amber{background:var(--k04-amber);color:#212529}
.k04-btn-amber:hover{background:var(--k04-amber-deep);color:#212529;box-shadow:0 2px 8px rgba(255,193,7,.5)}
.k04-btn-gold{background:var(--k04-amber);color:#212529}
.k04-btn-gold:hover{background:var(--k04-amber-deep);color:#212529}
.k04-btn-ghost{background:#fff;color:var(--k04-blue);border:1.5px solid var(--k04-blue)}
.k04-btn-ghost:hover{background:var(--k04-blue);color:#fff}

/* ===== 顶部导航（暗色吸顶 + 琥珀高亮）===== */
.k04-header{position:sticky;top:0;z-index:1000;background:var(--k04-dark);box-shadow:0 2px 12px rgba(0,0,0,.18)}
.k04-header .k04-container{display:flex;align-items:center;justify-content:space-between;min-height:70px;flex-wrap:wrap}
.k04-brand{display:flex;align-items:center;gap:10px;color:#fff}
.k04-brand:hover{color:#fff}
.k04-brand-mark{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--k04-blue),var(--k04-blue2));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900}
.k04-brand-name{font-size:22px;font-weight:800;letter-spacing:.5px}
.k04-header-right{display:flex;align-items:center;gap:14px}
.k04-cta{padding:8px 18px;font-size:14px}
.k04-menu-toggle{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer;line-height:1}
.k04-nav ul{display:flex;align-items:center;gap:8px}
.k04-nav a{color:#fff;padding:8px 14px;border-radius:6px;font-size:15px;font-weight:500}
.k04-nav a:hover,.k04-nav li.active a{background:rgba(255,255,255,.1);color:var(--k04-amber)}

/* ===== Hero 双列 ===== */
.k04-hero{background:linear-gradient(to bottom,#e0efff,#fff);padding:90px 0 70px}
.k04-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.k04-eyebrow{display:inline-block;color:var(--k04-blue);font-weight:700;letter-spacing:1px;font-size:13px;text-transform:uppercase;margin-bottom:14px}
.k04-hero-text h1{font-size:38px;color:#1a1a1a;margin-bottom:16px}
.k04-hero-text h1 strong{color:var(--k04-blue)}
.k04-hero-text .lead{font-size:17px;color:var(--k04-body);margin-bottom:26px;max-width:520px}
.k04-hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.k04-hero-visual img{border-radius:16px;box-shadow:var(--k04-shadow);width:100%;height:auto}

/* ===== 通用区块与标题 ===== */
.k04-section,.k04-about,.k04-stats,.k04-security,.k04-update,.k04-mission,.k04-news,.k04-latest,.k04-cats{padding:64px 0}
.k04-about{background:#fff}
.k04-sec-title{text-align:center;font-size:30px;color:var(--k04-blue);margin-bottom:26px}
.k04-sec-title.light{color:#fff}
.k04-sec-sub{text-align:center;color:var(--k04-muted);max-width:720px;margin:0 auto 40px;font-size:15px}
.k04-sec-sub.light{color:rgba(255,255,255,.8)}
.k04-sec-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:26px}
.k04-sec-head h2{font-size:24px}
.k04-sec-head .sub{color:var(--k04-muted);font-size:14px;margin-top:4px}
.k04-sec-head .more{color:var(--k04-blue);font-weight:600;font-size:14px}

/* ===== 公司简介 ===== */
.k04-about-text{max-width:900px;margin:0 auto 34px}
.k04-about-text p{color:var(--k04-muted);margin-bottom:14px;font-size:16px}
.k04-about-text strong{color:var(--k04-blue)}
.k04-about-img{max-width:960px;margin:0 auto}
.k04-about-img img{border-radius:16px;box-shadow:var(--k04-shadow);width:100%}

/* ===== 智能数据快照 ===== */
.k04-stats{background:#fefefe;border-top:1px solid var(--k04-line);border-bottom:1px solid var(--k04-line)}
.k04-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.k04-stats-item{background:#fff;border:1px solid var(--k04-line);border-radius:var(--k04-radius);padding:26px 20px;display:flex;align-items:center;gap:16px;transition:.3s;box-shadow:0 2px 8px rgba(16,40,90,.04)}
.k04-stats-item:hover{transform:translateY(-4px);box-shadow:var(--k04-shadow)}
.k04-stats-item .ico{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;flex-shrink:0}
.k04-stats-item .ico.c1{background:#e8f5e9} .k04-stats-item .ico.c2{background:#fff6e0} .k04-stats-item .ico.c3{background:#e3f2fd} .k04-stats-item .ico.c4{background:#fde8e8}
.k04-stats-item h5{font-size:15px;color:var(--k04-muted);font-weight:500}
.k04-stats-item b{display:block;font-size:26px;color:var(--k04-ink);margin:2px 0}
.k04-stats-item small{color:var(--k04-muted);font-size:13px}

/* ===== 安全流程层级 ===== */
.k04-security{background:linear-gradient(to bottom,#fdfdfd,#e6ecf3)}
.k04-security-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.k04-security-visual img{border-radius:16px;box-shadow:var(--k04-shadow);width:100%}
.k04-security-steps h2{font-size:26px;margin-bottom:22px}
.k04-security-steps .step{display:flex;gap:16px;margin-bottom:22px;align-items:flex-start}
.k04-security-steps .step-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;color:#fff}
.k04-security-steps .step.s1 .step-icon{background:var(--k04-blue)} .step.s2 .step-icon{background:#198754} .step.s3 .step-icon{background:var(--k04-amber-deep)} .step.s4 .step-icon{background:#dc3545}
.k04-security-steps .step h5{font-size:17px;margin-bottom:4px}
.k04-security-steps .step p{color:var(--k04-muted);font-size:14px}

/* ===== 版本更新（原生 details 手风琴）===== */
.k04-update{background:linear-gradient(135deg,#1e3c72,#2a5298)}
.k04-accordion{max-width:900px;margin:0 auto}
.k04-accordion details{background:#fff;border-radius:12px;overflow:hidden;margin-bottom:16px;box-shadow:0 8px 20px rgba(0,0,0,.08)}
.k04-accordion summary{cursor:pointer;list-style:none;font-weight:600;font-size:16px;color:#1d3557;padding:18px 22px;background:#fff;position:relative;transition:.3s}
.k04-accordion summary::-webkit-details-marker{display:none}
.k04-accordion summary:after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--k04-blue)}
.k04-accordion details[open] summary{background:#e3f2fd;color:var(--k04-blue)}
.k04-accordion details[open] summary:after{content:"−"}
.k04-accordion .body{padding:6px 22px 20px;color:#333;font-size:15px}
.k04-accordion .body ul{padding-left:20px}
.k04-accordion .body li{line-height:1.9;margin-bottom:4px;list-style:disc}

/* ===== 品牌使命 ===== */
.k04-mission{background:linear-gradient(to right,var(--k04-dark),var(--k04-dark2))}
.k04-mission-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.k04-mission-img img{border-radius:16px;box-shadow:0 12px 32px rgba(0,0,0,.3);width:100%}
.k04-mission-text h2{color:#fff;font-size:26px;margin-bottom:16px}
.k04-mission-text p{color:#ccc;margin-bottom:16px;line-height:1.8}
.k04-mission-list li{color:#ddd;margin-bottom:14px;font-size:15px;line-height:1.6}
.k04-mission-list strong{color:var(--k04-amber)}

/* ===== 推荐热讯卡 ===== */
.k04-news{background:#fff}
.k04-news-head{text-align:center;margin-bottom:36px}
.k04-news-head h2{font-size:28px}
.k04-news-head p{color:var(--k04-muted);font-size:14px;margin-top:6px}
.k04-news-wrapper{display:grid;grid-template-columns:1fr;gap:22px}
.k04-news-card{display:flex;background:var(--k04-panel);border:1px solid var(--k04-line);border-radius:16px;overflow:hidden;min-height:160px;transition:.3s}
.k04-news-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.1)}
.k04-news-img{width:240px;min-height:160px;max-height:190px;flex-shrink:0;overflow:hidden}
.k04-news-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.k04-news-card:hover .k04-news-img img{transform:scale(1.05)}
.k04-news-body{padding:22px;display:flex;flex-direction:column;justify-content:space-between;flex:1}
.k04-news-body h3{font-size:18px;margin-bottom:8px}
.k04-news-body h3 a:hover{color:var(--k04-blue)}
.k04-news-body .desc{color:var(--k04-muted);font-size:14px;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.k04-news-foot{display:flex;justify-content:space-between;align-items:center}
.k04-news-foot time{color:var(--k04-muted);font-size:13px}
.k04-news-foot .more{color:var(--k04-blue);font-weight:600;font-size:14px}

/* ===== 最新资讯 + 侧栏 ===== */
.k04-latest{background:var(--k04-panel)}
.k04-cats{background:#fff}
.k04-news-layout{display:grid;grid-template-columns:1fr 320px;gap:30px;align-items:start}
.k04-news-list{display:grid;grid-template-columns:1fr;gap:18px}
.k04-news-list .news-item{display:flex;gap:16px;background:#fff;border:1px solid var(--k04-line);border-radius:12px;overflow:hidden;padding:14px;transition:.3s}
.k04-news-list .news-item:hover{box-shadow:var(--k04-shadow);border-color:#cfe0ff}
.k04-news-list .news-item .thumb{width:150px;height:104px;flex-shrink:0;border-radius:8px;overflow:hidden}
.k04-news-list .news-item .thumb img{width:100%;height:100%;object-fit:cover}
.k04-news-list .news-item .body{flex:1;display:flex;flex-direction:column}
.k04-news-list .news-item h3{font-size:17px;margin-bottom:6px}
.k04-news-list .news-item .desc{color:var(--k04-muted);font-size:14px;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.k04-news-list .news-item .meta{margin-top:auto;color:var(--k04-muted);font-size:13px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.k04-news-list .news-item .meta .cat{color:var(--k04-blue);background:#eaf1ff;padding:2px 10px;border-radius:20px;font-weight:600}
.k04-side .box{background:#fff;border:1px solid var(--k04-line);border-radius:12px;padding:20px;margin-bottom:20px}
.k04-side .box h4{font-size:17px;margin-bottom:16px;padding-left:12px;border-left:4px solid var(--k04-blue)}
.k04-rank li{display:flex;gap:10px;align-items:baseline;padding:8px 0;border-bottom:1px dashed var(--k04-line)}
.k04-rank li:last-child{border-bottom:0}
.k04-rank .num{width:22px;height:22px;flex-shrink:0;border-radius:6px;background:var(--k04-panel-2);color:var(--k04-muted);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.k04-rank li:nth-child(-n+3) .num{background:var(--k04-blue);color:#fff}
.k04-rank .title{font-size:14px;line-height:1.5}
.k04-tags{display:flex;flex-wrap:wrap;gap:8px}
.k04-tags a{background:var(--k04-panel-2);color:var(--k04-muted);font-size:13px;padding:5px 12px;border-radius:20px}
.k04-tags a:hover{background:var(--k04-blue);color:#fff}

/* ===== 栏目导航块 ===== */
.k04-cat-blocks{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.k04-cat-block{background:#fff;border:1px solid var(--k04-line);border-radius:12px;padding:20px}
.k04-cat-block .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;border-bottom:1px solid var(--k04-line);padding-bottom:10px}
.k04-cat-block .head h3{font-size:17px}
.k04-cat-block .head a{color:var(--k04-blue);font-size:13px}
.k04-cat-block ul li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;font-size:14px;border-bottom:1px dashed var(--k04-line)}
.k04-cat-block ul li:last-child{border-bottom:0}
.k04-cat-block ul a{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.k04-cat-block ul time{color:var(--k04-muted);font-size:12px;flex-shrink:0}

/* ===== 内页：页头 / 面包屑 ===== */
.k04-page-head{background:linear-gradient(135deg,#e0efff,#f5f9ff);padding:38px 0 28px;border-bottom:1px solid var(--k04-line)}
.k04-page-head h1{font-size:28px}
.k04-crumb{color:var(--k04-muted);font-size:14px;margin-bottom:10px}
.k04-crumb a{color:var(--k04-muted)}.k04-crumb a:hover{color:var(--k04-blue)}
.k04-crumb span{margin:0 8px;color:#adb5bd}

/* ===== 详情页 ===== */
.k04-detail{background:#fff;border:1px solid var(--k04-line);border-radius:var(--k04-radius);padding:34px}
.k04-detail h1.title{font-size:28px;margin-bottom:16px}
.k04-detail .meta{color:var(--k04-muted);font-size:14px;display:flex;gap:18px;flex-wrap:wrap;padding-bottom:18px;margin-bottom:24px;border-bottom:1px solid var(--k04-line)}
.k04-detail .meta .cat{color:var(--k04-blue);background:#eaf1ff;padding:2px 12px;border-radius:20px;font-weight:600}
.k04-content{font-size:17px;color:#2b2b2b;line-height:1.9}
.k04-content p{margin-bottom:18px}
.k04-content h2,.k04-content h3{margin:26px 0 14px;color:var(--k04-ink)}
.k04-content img{border-radius:10px;margin:16px auto;box-shadow:var(--k04-shadow)}
.k04-content ul,.k04-content ol{padding-left:26px;margin-bottom:18px}
.k04-content li{list-style:disc;margin-bottom:8px}
.k04-content blockquote{border-left:4px solid var(--k04-blue);background:var(--k04-panel);padding:14px 18px;margin:18px 0;border-radius:0 8px 8px 0;color:var(--k04-muted)}
.k04-detail-tags{margin-top:24px}
.k04-pn{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:20px;border-top:1px solid var(--k04-line)}
.k04-pn .p{flex:1;max-width:48%}
.k04-pn .p.next{text-align:right}
.k04-pn .label{color:var(--k04-muted);font-size:13px;margin-bottom:4px}
.k04-pagination{display:flex;justify-content:center;gap:8px;margin-top:28px;flex-wrap:wrap}
.k04-pagination a,.k04-pagination span{padding:8px 14px;border:1px solid var(--k04-line);border-radius:8px;background:#fff;font-size:14px;color:var(--k04-body)}
.k04-pagination .current,.k04-pagination a:hover{background:var(--k04-blue);color:#fff;border-color:var(--k04-blue)}
.k04-empty{background:#fff;border:1px dashed var(--k04-line);border-radius:10px;padding:34px;text-align:center;color:var(--k04-muted)}

/* ===== 页脚 ===== */
.k04-footer{background:var(--k04-dark);color:#cbd5e1;padding:48px 0 24px}
.k04-footer-cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.08)}
.k04-footer-name{font-size:20px;color:#fff;margin-bottom:12px}
.k04-footer-brand p{color:#94a3b8;font-size:14px;max-width:360px}
.k04-footer-col h5{color:#fff;font-size:16px;margin-bottom:16px}
.k04-flinks li{margin-bottom:9px}
.k04-flinks a{color:#94a3b8;font-size:14px}
.k04-flinks a:hover{color:var(--k04-amber)}
.k04-copy{text-align:center;padding-top:22px;color:#64748b;font-size:13px}
.k04-copy a{color:#64748b}.k04-copy a:hover{color:var(--k04-amber)}

/* ===== 回到顶部 ===== */
.k04-totop{position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:10px;background:var(--k04-blue);color:#fff;display:none;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--k04-shadow);z-index:900}
.k04-totop:hover{background:var(--k04-blue-deep);color:#fff}

/* ===== 响应式 ===== */
@media (max-width:992px){
    .k04-hero-grid,.k04-security-grid,.k04-mission-grid{grid-template-columns:1fr;gap:28px}
    .k04-hero-visual{order:-1}
    .k04-news-layout{grid-template-columns:1fr}
    .k04-stats-grid{grid-template-columns:repeat(2,1fr)}
    .k04-cat-blocks{grid-template-columns:repeat(2,1fr)}
    .k04-footer-cols{grid-template-columns:1fr 1fr}
    .k04-hero-text h1{font-size:32px}
}
@media (max-width:768px){
    .k04-menu-toggle{display:block}
    .k04-header .k04-container{min-height:64px}
    .k04-nav{width:100%;display:none;order:3;padding:8px 0 4px}
    .k04-nav.open{display:block}
    .k04-nav ul{flex-direction:column;align-items:stretch;gap:2px}
    .k04-nav a{display:block;padding:12px 10px;border-radius:8px}
    .k04-hero{padding:56px 0 44px}
    .k04-section,.k04-about,.k04-stats,.k04-security,.k04-update,.k04-mission,.k04-news,.k04-latest,.k04-cats{padding:44px 0}
    .k04-news-card{flex-direction:column}
    .k04-news-img{width:100%;height:200px;max-height:200px}
    .k04-detail{padding:22px}
    .k04-detail h1.title{font-size:24px}
}
@media (max-width:560px){
    .k04-stats-grid,.k04-cat-blocks{grid-template-columns:1fr}
    .k04-footer-cols{grid-template-columns:1fr}
    .k04-hero-text h1{font-size:27px}
    .k04-sec-title{font-size:24px}
    .k04-news-list .news-item{flex-direction:column}
    .k04-news-list .news-item .thumb{width:100%;height:180px}
    .k04-pn{flex-direction:column}
    .k04-pn .p,.k04-pn .p.next{max-width:100%;text-align:left}
}