/* ==========================================================================
   蓝金体育门户模板 amx —— 参照 www.amxtreme.com
   自实现 Bootstrap 视觉语言，无外部依赖，图标使用 emoji
   主题：深色吸顶导航 + 黄色高亮 CTA + 蓝色区块标题 + 浅蓝渐变 Hero
   ========================================================================== */

:root{
    --amx-primary:#0d6efd;
    --amx-primary-dark:#0b5ed7;
    --amx-dark:#212529;
    --amx-darker:#161a1e;
    --amx-gold:#ffc107;
    --amx-gold-dark:#e0a800;
    --amx-success:#198754;
    --amx-warning:#ffc107;
    --amx-info:#0dcaf0;
    --amx-danger:#dc3545;
    --amx-text:#212529;
    --amx-muted:#6c757d;
    --amx-border:#e9ecef;
    --amx-bg-soft:#f0f4ff;
    --amx-radius:16px;
    --amx-shadow:0 10px 30px rgba(13,110,253,.08);
    --amx-shadow-sm:0 4px 14px rgba(33,37,41,.06);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
    color:var(--amx-text);
    background:#fff;
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .25s ease,opacity .25s ease;}
a:hover{color:var(--amx-primary);}
img{max-width:100%;height:auto;display:block;border:0;}
ul{list-style:none;}
h1,h2,h3,h4,h5,h6{line-height:1.35;font-weight:700;color:var(--amx-text);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.site-main{display:block;}
.text-muted{color:var(--amx-muted)!important;}
.small{font-size:.875rem;}
.text-success{color:var(--amx-success)!important;}
.text-warning{color:var(--amx-warning)!important;}
.text-info{color:var(--amx-info)!important;}
.text-danger{color:var(--amx-danger)!important;}

/* ---------------- 通用区块 ---------------- */
section{padding:64px 0;}
.sec-head{text-align:center;max-width:760px;margin:0 auto 42px;}
.sec-head h2,.sec-title{font-size:30px;font-weight:800;margin-bottom:14px;}
.sec-head p{color:var(--amx-muted);font-size:16px;}
.sec-label{
    display:inline-block;color:var(--amx-primary);font-weight:800;font-size:15px;
    letter-spacing:2px;margin-bottom:12px;text-transform:uppercase;
    position:relative;padding:0 14px;
}
.sec-label::before,.sec-label::after{
    content:"";position:absolute;top:50%;width:22px;height:2px;background:var(--amx-primary);opacity:.5;
}
.sec-label::before{left:-16px;}
.sec-label::after{right:-16px;}
.sec-sub{color:rgba(255,255,255,.65);text-align:center;margin-bottom:30px;}

/* ---------------- 顶部导航 ---------------- */
.site-header{
    position:sticky;top:0;z-index:999;
    background:var(--amx-dark);
    box-shadow:0 2px 18px rgba(0,0,0,.28);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:68px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;}
.brand:hover{color:#fff;}
.brand-logo{width:44px;height:44px;border-radius:10px;object-fit:cover;background:var(--amx-darker);}
.brand-text{font-size:20px;font-weight:800;letter-spacing:.5px;color:#fff;}
.header-actions{display:flex;align-items:center;gap:14px;}
.btn-register{
    display:inline-flex;align-items:center;gap:6px;
    padding:9px 20px;border-radius:999px;font-weight:700;font-size:14px;
    color:var(--amx-dark);background:linear-gradient(135deg,var(--amx-gold),var(--amx-gold-dark));
    box-shadow:0 4px 14px rgba(255,193,7,.35);
}
.btn-register:hover{color:var(--amx-dark);transform:translateY(-1px);box-shadow:0 8px 22px rgba(255,193,7,.45);}
.main-nav ul{display:flex;align-items:center;gap:6px;}
.main-nav>ul>li{position:relative;}
.main-nav>ul>li>a{
    display:block;padding:8px 16px;color:rgba(255,255,255,.82);font-size:15px;font-weight:600;border-radius:8px;
}
.main-nav>ul>li>a:hover{color:#fff;background:rgba(255,255,255,.08);}
.main-nav>ul>li.active>a{color:var(--amx-gold);}
.main-nav .dropdown{
    position:absolute;top:100%;left:0;min-width:180px;background:#fff;border-radius:12px;
    box-shadow:0 16px 40px rgba(0,0,0,.18);padding:8px;opacity:0;visibility:hidden;transform:translateY(10px);
    transition:all .25s ease;z-index:50;
}
.main-nav>ul>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(6px);}
.main-nav .dropdown li a{display:block;padding:9px 14px;color:var(--amx-text);font-size:14px;border-radius:8px;}
.main-nav .dropdown li a:hover{background:var(--amx-bg-soft);color:var(--amx-primary);}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;border:0;background:rgba(255,255,255,.08);border-radius:10px;cursor:pointer;align-items:center;justify-content:center;}
.nav-toggle span{display:block;width:20px;height:2px;background:#fff;border-radius:2px;transition:.3s;}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------------- Hero ---------------- */
.sec-hero{background:linear-gradient(to right,#ffffff,#eef4ff);padding:80px 0;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero-text h1{font-size:44px;line-height:1.2;font-weight:900;margin-bottom:16px;}
.hero-text h1 strong{color:var(--amx-primary);}
.hero-slogan{color:var(--amx-gold-dark);font-weight:800;letter-spacing:3px;font-size:15px;margin-bottom:18px;}
.hero-desc{color:var(--amx-muted);font-size:17px;margin-bottom:30px;max-width:520px;}
.btn-hero{
    display:inline-block;padding:15px 40px;border-radius:999px;font-weight:800;font-size:16px;
    color:#fff;background:linear-gradient(135deg,var(--amx-primary),var(--amx-primary-dark));
    box-shadow:0 10px 28px rgba(13,110,253,.35);
}
.btn-hero:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 34px rgba(13,110,253,.45);}
.hero-media img{width:100%;max-width:520px;margin-left:auto;border-radius:24px;box-shadow:0 24px 60px rgba(13,110,253,.22);}

/* ---------------- 核心优势 features ---------------- */
.sec-features{background:#fff;}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.feature-card{
    background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);
    padding:32px 24px;text-align:center;box-shadow:var(--amx-shadow-sm);transition:transform .3s ease,box-shadow .3s ease;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--amx-shadow);}
.feature-icon{
    width:64px;height:64px;line-height:64px;margin:0 auto 18px;border-radius:18px;font-size:28px;color:#fff;
}
.bg-primary{background:linear-gradient(135deg,var(--amx-primary),var(--amx-primary-dark));}
.bg-success{background:linear-gradient(135deg,#1aa36a,#198754);}
.bg-warning{background:linear-gradient(135deg,var(--amx-gold),var(--amx-gold-dark));}
.bg-info{background:linear-gradient(135deg,#22d3ee,#0dcaf0);}
.bg-danger{background:linear-gradient(135deg,#ef4444,#dc3545);}
.feature-card h5{font-size:18px;margin-bottom:10px;}
.feature-card p{color:var(--amx-muted);font-size:14.5px;}

/* ---------------- 数据快照 stats ---------------- */
.sec-stats{background:linear-gradient(to bottom,#f7faff,#eef4ff);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stats-item{
    background:#fff;border-radius:var(--amx-radius);padding:30px 22px;display:flex;gap:16px;align-items:flex-start;
    box-shadow:var(--amx-shadow-sm);border:1px solid var(--amx-border);transition:transform .3s ease;
}
.stats-item:hover{transform:translateY(-5px);}
.stats-icon{font-size:34px;line-height:1;flex-shrink:0;}
.stats-data h5{font-size:15px;color:var(--amx-muted);font-weight:600;margin-bottom:6px;}
.stats-data .num{font-size:32px;font-weight:900;color:var(--amx-text);line-height:1;margin-bottom:6px;}
.stats-data small{font-size:13px;}

/* ---------------- 安全流程 security ---------------- */
.sec-security{background:#fff;}
.security-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.security-visual img{width:100%;border-radius:22px;box-shadow:0 20px 50px rgba(33,37,41,.16);}
.security-steps h2{font-size:28px;margin-bottom:26px;}
.security-step{display:flex;gap:18px;margin-bottom:24px;align-items:flex-start;}
.step-icon{width:52px;height:52px;line-height:52px;text-align:center;border-radius:14px;font-size:22px;color:#fff;flex-shrink:0;}
.security-step h5{font-size:17px;margin-bottom:6px;}
.security-step p{color:var(--amx-muted);font-size:14.5px;}

/* ---------------- 版本更新 update（深蓝渐变） ---------------- */
.sec-update{background:linear-gradient(135deg,#1e3c72 0%,#2a5298 100%);color:#fff;}
.sec-update h2{color:#fff;text-align:center;font-size:30px;margin-bottom:12px;}
.accordion{max-width:860px;margin:0 auto;}
.accordion-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;margin-bottom:14px;overflow:hidden;}
.accordion-toggle{display:block;cursor:pointer;}
.accordion-title{padding:18px 22px;font-size:17px;font-weight:700;color:#fff;position:relative;padding-right:44px;}
.accordion-title::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:24px;color:var(--amx-gold);transition:transform .3s;}
.accordion-item.open .accordion-title::after{content:"−";}
.accordion-body{max-height:0;overflow:hidden;transition:max-height .4s ease;}
.accordion-item.open .accordion-body{max-height:600px;}
.accordion-body ul{padding:0 22px 20px 22px;}
.accordion-body li{color:rgba(255,255,255,.78);font-size:15px;padding:6px 0 6px 20px;position:relative;}
.accordion-body li::before{content:"›";position:absolute;left:0;color:var(--amx-gold);}

/* ---------------- 品牌使命 mission（深色） ---------------- */
.sec-mission{background:var(--amx-dark);color:#fff;}
.mission-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.mission-media img{width:100%;border-radius:22px;box-shadow:0 20px 50px rgba(0,0,0,.4);}
.mission-text h2{color:#fff;font-size:28px;margin-bottom:18px;}
.mission-text h2 .flag{margin-right:8px;}
.mission-text p{color:rgba(255,255,255,.72);margin-bottom:16px;font-size:15.5px;}
.mission-list li{display:flex;gap:12px;align-items:flex-start;color:rgba(255,255,255,.85);margin-bottom:14px;font-size:15px;}
.mission-list .mi{width:34px;height:34px;line-height:34px;text-align:center;background:rgba(255,193,7,.15);border-radius:10px;flex-shrink:0;font-size:18px;}
.mission-list strong{color:var(--amx-gold);}

/* ---------------- 推荐热讯 news ---------------- */
.sec-news{background:linear-gradient(to bottom,#f7faff,#ffffff);}
.news-wrapper{display:grid;gap:20px;}
.news-card{display:flex;gap:22px;background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);overflow:hidden;box-shadow:var(--amx-shadow-sm);transition:transform .3s ease,box-shadow .3s ease;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--amx-shadow);}
.news-img-wrap{flex-shrink:0;width:240px;overflow:hidden;}
.news-img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.news-card:hover .news-img-wrap img{transform:scale(1.06);}
.news-body{flex:1;padding:22px 26px 22px 0;display:flex;flex-direction:column;justify-content:space-between;}
.news-body h3{font-size:19px;margin-bottom:10px;}
.news-body h3 a{color:var(--amx-text);}
.news-body h3 a:hover{color:var(--amx-primary);}
.news-excerpt{color:var(--amx-muted);font-size:14.5px;margin-bottom:14px;}
.news-foot{display:flex;justify-content:space-between;align-items:center;}
.news-date{color:var(--amx-muted);font-size:13px;}
.news-more{color:var(--amx-primary);font-weight:700;font-size:14px;}

/* ---------------- 列表页 ---------------- */
.sec-list{padding:40px 0 64px;}
.breadcrumb-nav{padding:22px 0 6px;font-size:14px;color:var(--amx-muted);}
.breadcrumb-nav a{color:var(--amx-muted);}
.breadcrumb-nav a:hover{color:var(--amx-primary);}
.nav-scroll{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 26px;padding-bottom:6px;}
.nav-scroll a{padding:8px 18px;border-radius:999px;border:1px solid var(--amx-border);font-size:14px;color:var(--amx-muted);background:#fff;}
.nav-scroll a:hover{border-color:var(--amx-primary);color:var(--amx-primary);}
.nav-scroll a.on{background:var(--amx-dark);color:var(--amx-gold);border-color:var(--amx-dark);}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.list-card{display:block;background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);overflow:hidden;box-shadow:var(--amx-shadow-sm);transition:transform .3s ease,box-shadow .3s ease;}
.list-card:hover{transform:translateY(-6px);box-shadow:var(--amx-shadow);}
.list-card .thumb{aspect-ratio:16/9;overflow:hidden;}
.list-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.list-card:hover .thumb img{transform:scale(1.06);}
.list-card .info{padding:18px 20px 22px;}
.list-card .info h3{font-size:17px;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:44px;}
.list-card .meta{display:flex;justify-content:space-between;font-size:13px;color:var(--amx-muted);}

/* ---------------- 分页 ---------------- */
.pagination-wrap{margin-top:40px;text-align:center;}
.pagination-wrap .pagination{display:inline-flex;gap:6px;flex-wrap:wrap;justify-content:center;}
.pagination-wrap .pagination li a,.pagination-wrap .pagination li span{display:block;min-width:42px;height:42px;line-height:42px;padding:0 12px;border-radius:10px;border:1px solid var(--amx-border);color:var(--amx-muted);background:#fff;font-size:14px;text-align:center;}
.pagination-wrap .pagination li a:hover{border-color:var(--amx-primary);color:var(--amx-primary);}
.pagination-wrap .pagination li.active a,.pagination-wrap .pagination li.active span{background:var(--amx-dark);border-color:var(--amx-dark);color:var(--amx-gold);}
.pagination-wrap .pagination li.disabled span{opacity:.5;}

/* ---------------- 文章详情 ---------------- */
.sec-article{padding:36px 0 64px;}
.article-topbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;}
.detail-time{font-size:14px;color:var(--amx-muted);}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:32px;margin-top:20px;}
.article-main{min-width:0;}
.article-head-card{background:var(--amx-dark);border-radius:var(--amx-radius);padding:30px 30px 26px;margin-bottom:22px;}
.article-head-card h1{color:#fff;font-size:28px;line-height:1.4;margin-bottom:16px;}
.detail-meta{display:flex;flex-wrap:wrap;gap:18px;color:rgba(255,255,255,.6);font-size:14px;}
.detail-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.detail-tags a{padding:5px 14px;border-radius:999px;background:rgba(255,255,255,.1);color:var(--amx-gold);font-size:13px;}
.detail-tags a:hover{background:rgba(255,193,7,.2);}
.article-body-card{background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);padding:14px 30px 30px;box-shadow:var(--amx-shadow-sm);}
.article-body{font-size:16.5px;line-height:1.9;color:#333;overflow-wrap:break-word;}
.article-body p{margin:0 0 18px;}
.article-body img{max-width:100%;height:auto;border-radius:14px;margin:10px auto;}
.article-body h2,.article-body h3,.article-body h4{margin:26px 0 14px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body blockquote{border-left:4px solid var(--amx-primary);background:var(--amx-bg-soft);padding:14px 20px;margin:0 0 18px;border-radius:0 12px 12px 0;color:#555;}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 18px;}
.article-body table th,.article-body table td{border:1px solid var(--amx-border);padding:10px 12px;text-align:left;}
.article-body table th{background:var(--amx-bg-soft);}
.article-body pre,.article-body code{background:#f5f6f8;border-radius:8px;font-size:14px;}
.article-body pre{padding:16px;overflow:auto;}
.article-body code{padding:2px 6px;}
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px;}
.nav-cell{background:#fff;border:1px solid var(--amx-border);border-radius:14px;padding:16px 20px;}
.nav-cell p{font-size:13px;color:var(--amx-muted);margin-bottom:6px;}
.nav-cell a{font-size:15px;font-weight:600;color:var(--amx-text);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.nav-cell a:hover{color:var(--amx-primary);}
.nav-cell.next{text-align:right;}
.related-section{margin-top:34px;}
.related-section h3{font-size:20px;margin-bottom:18px;}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.related-card{background:#fff;border:1px solid var(--amx-border);border-radius:14px;overflow:hidden;}
.related-card .thumb{aspect-ratio:16/10;overflow:hidden;}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;}
.related-card h4{font-size:14.5px;padding:12px 14px 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:40px;}
.related-card .date{display:block;padding:0 14px 12px;font-size:12px;color:var(--amx-muted);}

/* ---------------- 侧栏 widget ---------------- */
.widget{background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);padding:0 0 6px;margin-bottom:24px;box-shadow:var(--amx-shadow-sm);overflow:hidden;}
.widget-title{font-size:17px;font-weight:800;padding:18px 22px;border-bottom:1px solid var(--amx-border);position:relative;}
.widget-title::before{content:"";position:absolute;left:0;top:16px;width:4px;height:20px;background:var(--amx-primary);border-radius:0 4px 4px 0;}
.widget-body{padding:18px 22px;}
.list-rows .list-row{display:flex;gap:14px;padding:12px 0;border-bottom:1px dashed var(--amx-border);}
.list-rows .list-row:last-child{border-bottom:0;}
.list-rows .list-row .thumb{flex-shrink:0;width:110px;height:74px;border-radius:10px;overflow:hidden;}
.list-rows .list-row .thumb img{width:100%;height:100%;object-fit:cover;}
.list-rows .list-row .info{min-width:0;}
.list-rows .list-row h4{font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:6px;}
.list-rows .list-row .desc{display:none;}
.list-rows .list-row .meta{display:flex;gap:12px;font-size:12px;color:var(--amx-muted);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag-cloud a{padding:6px 14px;border-radius:999px;background:var(--amx-bg-soft);color:var(--amx-muted);font-size:13px;}
.tag-cloud a:hover{background:var(--amx-primary);color:#fff;}

/* ---------------- 标签详情 ---------------- */
.tag-detail-header{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);padding:24px 28px;margin-bottom:24px;box-shadow:var(--amx-shadow-sm);}
.tag-icon{width:56px;height:56px;line-height:56px;text-align:center;font-size:26px;font-weight:900;color:#fff;background:linear-gradient(135deg,var(--amx-primary),var(--amx-primary-dark));border-radius:16px;}
.tag-info h2{font-size:22px;}
.tag-info p{color:var(--amx-muted);font-size:14px;}

/* ---------------- 搜索 ---------------- */
.search-section{background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);padding:26px 28px;margin-bottom:22px;box-shadow:var(--amx-shadow-sm);}
.search-section h2{font-size:20px;margin-bottom:16px;}
.search-form{display:flex;gap:12px;}
.search-form input[type=text]{flex:1;height:48px;padding:0 18px;border:1px solid var(--amx-border);border-radius:12px;font-size:15px;outline:none;}
.search-form input[type=text]:focus{border-color:var(--amx-primary);}
.search-form input[type=submit]{width:110px;height:48px;border:0;border-radius:12px;background:var(--amx-dark);color:var(--amx-gold);font-weight:700;cursor:pointer;}
.search-form input[type=submit]:hover{background:var(--amx-darker);}
.empty-tip{text-align:center;padding:50px 20px;color:var(--amx-muted);}
.empty-tip .empty-emoji{font-size:48px;margin-bottom:12px;}

/* ---------------- 单页 ---------------- */
.page-single{background:#fff;border:1px solid var(--amx-border);border-radius:var(--amx-radius);padding:36px 40px 44px;margin:14px 0 20px;box-shadow:var(--amx-shadow-sm);}
.page-single-head{text-align:center;margin-bottom:28px;}
.page-single-head h1{font-size:26px;}
.page-single-line{display:block;width:56px;height:4px;background:var(--amx-gold);border-radius:4px;margin:14px auto 0;}
.diy-page{background:#fff;border-radius:var(--amx-radius);padding:36px 40px;margin:20px 0;box-shadow:var(--amx-shadow-sm);}
.diy-page h1{margin-bottom:18px;}

/* ---------------- 页脚 ---------------- */
.site-footer{background:var(--amx-darker);color:rgba(255,255,255,.72);padding:56px 0 24px;position:relative;}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-col h6{color:#fff;font-size:17px;margin-bottom:18px;display:flex;align-items:center;gap:8px;}
.footer-col h6 .fi{font-size:18px;}
.flist li{margin-bottom:12px;font-size:14px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.flist li span{color:var(--amx-gold);}
.flist a{color:rgba(255,255,255,.7);}
.flist a:hover{color:var(--amx-gold);}
.footer-brand-col img{width:60px;height:60px;border-radius:12px;margin-bottom:14px;background:rgba(255,255,255,.06);}
.footer-brand-col p{font-size:14px;color:rgba(255,255,255,.6);margin-bottom:8px;line-height:1.8;}
.footer-bottom{padding-top:22px;text-align:center;font-size:13.5px;color:rgba(255,255,255,.5);}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-icp{color:rgba(255,255,255,.45);}

/* ---------------- 回到顶部 ---------------- */
#backTop{
    position:fixed;right:22px;bottom:22px;width:48px;height:48px;border:0;border-radius:50%;
    background:linear-gradient(135deg,var(--amx-primary),var(--amx-primary-dark));color:#fff;font-size:20px;
    cursor:pointer;display:none;align-items:center;justify-content:center;z-index:888;box-shadow:0 8px 24px rgba(13,110,253,.4);
}
#backTop:hover{transform:translateY(-3px);}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:992px){
    .hero-grid{grid-template-columns:1fr;gap:32px;text-align:center;}
    .hero-text h1{font-size:34px;}
    .hero-desc{margin-left:auto;margin-right:auto;}
    .hero-media img{margin:0 auto;}
    .feature-grid{grid-template-columns:repeat(2,1fr);}
    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .security-grid{grid-template-columns:1fr;gap:32px;}
    .security-visual{max-width:460px;margin:0 auto;}
    .mission-grid{grid-template-columns:1fr;gap:32px;}
    .mission-media{max-width:460px;margin:0 auto;}
    .list-grid{grid-template-columns:repeat(2,1fr);}
    .article-layout{grid-template-columns:1fr;}
    .article-side{margin-top:10px;}
    .related-grid{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr;gap:30px;}
    .nav-toggle{display:flex;}
    .main-nav{
        position:absolute;top:68px;left:0;right:0;background:var(--amx-dark);
        max-height:0;overflow:hidden;transition:max-height .35s ease;box-shadow:0 12px 24px rgba(0,0,0,.3);
    }
    .main-nav.open{max-height:70vh;overflow:auto;}
    .main-nav ul{flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 20px;}
    .main-nav>ul>li>a{padding:14px 12px;border-bottom:1px solid rgba(255,255,255,.06);border-radius:0;}
    .main-nav .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:rgba(255,255,255,.04);border-radius:10px;margin:4px 0;}
    .main-nav .dropdown li a{color:rgba(255,255,255,.7);}
    .main-nav .dropdown li a:hover{background:rgba(255,255,255,.08);color:var(--amx-gold);}
}
@media (max-width:600px){
    section{padding:46px 0;}
    .sec-head h2,.sec-title{font-size:24px;}
    .hero-text h1{font-size:28px;}
    .sec-hero{padding:52px 0;}
    .feature-grid,.stats-grid,.list-grid,.related-grid{grid-template-columns:1fr;}
    .news-card{flex-direction:column;}
    .news-img-wrap{width:100%;height:200px;}
    .news-body{padding:18px 20px 22px;}
    .article-head-card{padding:22px 20px;}
    .article-head-card h1{font-size:22px;}
    .article-body-card{padding:8px 20px 22px;}
    .article-nav{grid-template-columns:1fr;}
    .nav-cell.next{text-align:left;}
    .page-single{padding:24px 20px 30px;}
    .search-form input[type=submit]{width:88px;}
    .btn-register{padding:8px 14px;}
}