/* ============================================================
   MH迈汇 - 全站样式（暗红色主题） v4.0
   桌面 / 平板 / 手机 全适配
   ============================================================ */

:root{
    --primary:#8B1A1A;
    --primary-dark:#6B1010;
    --primary-light:#A83232;
    --primary-bg:#FBF3F3;
    --text:#2b2b2b;
    --text-light:#5a5a5a;
    --text-muted:#999;
    --white:#fff;
    --border:#e8e0e0;
    --shadow:0 4px 16px rgba(139,26,26,.08);
    --shadow-lg:0 12px 32px rgba(139,26,26,.12);
    --radius:10px;
    --radius-lg:14px;
    --transition:all .25s ease;
}

/* ---------------- Reset ---------------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    font-size:15px;
    line-height:1.75;
    color:var(--text);
    background:var(--white);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}

/* ---------------- 容器 ---------------- */
.container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.site-header{
    background:#fff;
    border-bottom:1px solid var(--border);
    position:sticky;
    top:0;
    z-index:1000;
    box-shadow:0 1px 3px rgba(0,0,0,.04);
}
.header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    min-height:76px;
}
.logo{display:flex;align-items:center;flex-shrink:0}
.logo img{max-height:48px;width:auto}
.logo-text{
    font-size:24px;
    font-weight:800;
    color:var(--primary);
    letter-spacing:.5px;
    white-space:nowrap;
}

.main-nav{flex:1;display:flex;justify-content:center}
.main-nav > ul{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.main-nav > ul > li{position:relative}
.main-nav > ul > li > a{
    display:inline-flex;
    align-items:center;
    gap:4px;
    padding:10px 16px;
    font-size:15px;
    font-weight:500;
    color:var(--text);
    border-radius:8px;
    white-space:nowrap;
    line-height:1.4;
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li > a.active{
    color:var(--primary);
    background:var(--primary-bg);
}
.arrow{font-size:11px;opacity:.7}

.sub-menu{
    position:absolute;
    top:calc(100% + 6px);
    left:50%;
    transform:translateX(-50%) translateY(6px);
    background:#fff;
    min-width:190px;
    border-radius:var(--radius);
    box-shadow:0 12px 32px rgba(0,0,0,.12);
    border:1px solid var(--border);
    padding:8px;
    opacity:0;
    visibility:hidden;
    transition:all .2s ease;
    z-index:1001;
}
.has-sub:hover .sub-menu{
    opacity:1;
    visibility:visible;
    transform:translateX(-50%) translateY(0);
}
.sub-menu::before{
    content:'';
    position:absolute;
    top:-6px;left:50%;
    margin-left:-6px;
    border:6px solid transparent;
    border-bottom-color:#fff;
}
.sub-menu li a{
    display:flex;
    align-items:center;
    gap:10px;
    padding:10px 14px;
    font-size:14px;
    color:var(--text);
    border-radius:6px;
    white-space:nowrap;
}
.sub-menu li a:hover{background:var(--primary-bg);color:var(--primary)}
.sub-menu li a span{font-size:15px}

.header-actions{
    display:flex;
    flex-direction:column;
    align-items:flex-end;
    gap:4px;
    flex-shrink:0;
}
.header-buttons{display:flex;gap:8px;align-items:center}
.qq-contact{font-size:12px;color:var(--text-muted);line-height:1.4}

.mobile-toggle{
    display:none;
    background:none;
    border:0;
    font-size:24px;
    color:var(--primary);
    padding:6px 10px;
    border-radius:8px;
    line-height:1;
}
.mobile-toggle:hover{background:var(--primary-bg)}

.mobile-qq{
    display:none;
    align-items:center;
    gap:4px;
    padding:6px 12px;
    border-radius:999px;
    background:var(--primary-bg);
    color:var(--primary);
    font-size:13px;
    font-weight:600;
    line-height:1;
    white-space:nowrap;
    border:1px solid rgba(139,26,26,.2);
    flex-shrink:0;
    letter-spacing:.3px;
}
.mobile-qq .qq-icon{font-size:14px;line-height:1}
.mobile-qq .qq-text{
    font-size:12.5px;
    font-variant-numeric:tabular-nums;
}
.mobile-qq:hover,
.mobile-qq:active{background:var(--primary);color:#fff}

/* ============================================================
   按钮
   ============================================================ */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:9px 20px;
    border-radius:8px;
    font-size:14px;
    font-weight:500;
    line-height:1.4;
    border:2px solid transparent;
    transition:var(--transition);
    white-space:nowrap;
    cursor:pointer;
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{
    background:var(--primary-dark);
    border-color:var(--primary-dark);
    color:#fff;
    transform:translateY(-1px);
    box-shadow:0 6px 16px rgba(139,26,26,.25);
}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-sm{padding:5px 12px;font-size:12px}
.btn-danger{background:#dc3545;color:#fff;border-color:#dc3545}
.btn-danger:hover{background:#b02a37;color:#fff}

/* ============================================================
   Banner
   ============================================================ */
.hero-banner{
    background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
    color:#fff;
    padding:100px 0;
    text-align:center;
}
.hero-content h1{
    font-size:44px;
    font-weight:800;
    letter-spacing:2px;
    margin-bottom:18px;
    line-height:1.25;
}
.hero-content p{font-size:18px;opacity:.9;margin-bottom:36px}
.page-banner{
    background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
    color:#fff;
    padding:56px 0;
    text-align:center;
}
.page-banner h1{font-size:34px;font-weight:800;margin-bottom:8px;letter-spacing:1px}
.page-banner p{font-size:15px;opacity:.85}
.error-banner h1{font-size:88px;line-height:1}

/* ============================================================
   Section 通用
   ============================================================ */
.section{padding:76px 0}
.section-title{
    text-align:center;
    font-size:30px;
    font-weight:800;
    color:var(--primary);
    margin-bottom:12px;
    letter-spacing:.5px;
}
.section-title::after{
    content:'';
    display:block;
    width:54px;
    height:3px;
    background:var(--primary);
    margin:14px auto 0;
    border-radius:2px;
}
.section-subtitle{
    text-align:center;
    color:var(--text-light);
    font-size:15px;
    margin-bottom:48px;
}

/* ============================================================
   平台介绍（首页）
   ============================================================ */
.intro-section{background:#fff}
.intro-wrap{
    display:grid;
    grid-template-columns:1.4fr 1fr;
    gap:48px;
    align-items:center;
}
.intro-text h3{
    font-size:22px;
    font-weight:800;
    color:var(--primary);
    margin-bottom:16px;
    line-height:1.45;
}
.intro-text p{
    font-size:15px;
    color:var(--text-light);
    line-height:1.9;
    margin-bottom:14px;
}
.intro-actions{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.intro-stats{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:16px;
}
.intro-stat{
    background:var(--primary-bg);
    border-radius:var(--radius-lg);
    padding:28px 20px;
    text-align:center;
    border:1px solid rgba(139,26,26,.08);
    transition:var(--transition);
}
.intro-stat:hover{
    background:#fff;
    border-color:var(--primary);
    box-shadow:var(--shadow);
}
.intro-stat .stat-num{
    font-size:32px;
    font-weight:800;
    color:var(--primary);
    line-height:1.2;
}
.intro-stat .stat-label{
    font-size:13px;
    color:var(--text-light);
    margin-top:6px;
}

/* ============================================================
   全球办公室（首页）
   ============================================================ */
.offices-section{background:#fff}
.offices-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
    gap:22px;
}
.office-card{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:26px 22px;
    transition:var(--transition);
}
.office-card:hover{
    border-color:var(--primary);
    box-shadow:var(--shadow-lg);
    transform:translateY(-4px);
}
.office-head{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:14px;
    flex-wrap:wrap;
}
.office-flag{font-size:26px;line-height:1}
.office-head h3{
    font-size:17px;
    font-weight:700;
    color:var(--primary);
    margin:0;
    line-height:1.3;
}
.office-badge{
    margin-left:auto;
    font-size:11px;
    padding:3px 9px;
    background:var(--primary);
    color:#fff;
    border-radius:999px;
    font-weight:500;
    letter-spacing:.3px;
    white-space:nowrap;
}
.office-addr,
.office-time{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.7;
    margin-bottom:6px;
}
.office-time{color:var(--text-muted);font-size:12.5px;margin-bottom:0}

/* ============================================================
   产品卡片
   ============================================================ */
.product-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:24px;
}
.product-card{
    display:flex;
    flex-direction:column;
    align-items:center;
    text-align:center;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:32px 22px;
    transition:var(--transition);
    height:100%;
}
.product-card:hover{
    border-color:var(--primary);
    box-shadow:var(--shadow-lg);
    transform:translateY(-6px);
}
.product-icon{
    width:64px;height:64px;
    display:flex;align-items:center;justify-content:center;
    font-size:32px;
    background:var(--primary-bg);
    border-radius:50%;
    margin-bottom:16px;
}
.product-card h3{
    font-size:18px;
    color:var(--primary);
    margin-bottom:10px;
    font-weight:700;
}
.product-card p{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.65;
    margin-bottom:16px;
    flex:1;
}
.card-link{font-size:13px;font-weight:500;color:var(--primary)}
.card-link:hover{color:var(--primary-dark)}

/* ============================================================
   优势
   ============================================================ */
.advantages-section{background:var(--primary-bg)}
.advantage-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:24px;
}
.advantage-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:32px 22px;
    text-align:center;
    height:100%;
    transition:var(--transition);
}
.advantage-item:hover{
    box-shadow:var(--shadow);
    transform:translateY(-4px);
    border-color:var(--primary);
}
.adv-icon{
    display:inline-flex;
    align-items:center;justify-content:center;
    width:64px;height:64px;
    font-size:32px;
    background:var(--primary-bg);
    border-radius:50%;
    margin-bottom:14px;
}
.advantage-item h3{
    font-size:17px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:8px;
}
.advantage-item p{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.7;
}

/* ============================================================
   新闻
   ============================================================ */
.news-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:24px;
}
.news-card{
    display:flex;
    flex-direction:column;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    overflow:hidden;
    transition:var(--transition);
    height:100%;
}
.news-card:hover{
    box-shadow:var(--shadow-lg);
    transform:translateY(-4px);
    border-color:var(--primary);
}
.news-thumb{
    width:100%;
    aspect-ratio:16/9;
    overflow:hidden;
    background:var(--primary-bg);
}
.news-thumb img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .4s ease;
}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-body h3{
    font-size:16px;
    font-weight:700;
    line-height:1.5;
    margin-bottom:10px;
}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.65;
    margin-bottom:12px;
    flex:1;
}
.news-body time{font-size:12px;color:var(--text-muted)}

.news-list{display:flex;flex-direction:column;gap:20px}
.news-list-item{
    display:flex;
    gap:22px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    overflow:hidden;
    transition:var(--transition);
}
.news-list-item:hover{box-shadow:var(--shadow);border-color:var(--primary)}
.news-list-thumb{
    width:260px;
    flex-shrink:0;
    aspect-ratio:16/10;
    overflow:hidden;
    background:var(--primary-bg);
}
.news-list-thumb img{width:100%;height:100%;object-fit:cover}
.news-list-body{padding:22px;flex:1;min-width:0}
.news-list-body h2{
    font-size:19px;
    font-weight:700;
    line-height:1.5;
    margin-bottom:10px;
}
.news-list-body h2 a{color:var(--text)}
.news-list-body h2 a:hover{color:var(--primary)}
.news-list-body p{
    font-size:14px;
    color:var(--text-light);
    line-height:1.7;
    margin-bottom:14px;
}
.news-meta{display:flex;gap:18px;font-size:12px;color:var(--text-muted)}

.pagination{
    display:flex;
    justify-content:center;
    flex-wrap:wrap;
    gap:6px;
    margin-top:44px;
}
.pagination a{
    display:inline-block;
    padding:8px 15px;
    border:1px solid var(--border);
    border-radius:8px;
    font-size:14px;
    color:var(--text);
    min-width:40px;
    text-align:center;
}
.pagination a:hover,
.pagination a.active{
    background:var(--primary);
    border-color:var(--primary);
    color:#fff;
}

/* ============================================================
   产品页
   ============================================================ */
.product-tabs{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:10px;
    margin-bottom:44px;
}
.product-tab{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:10px 22px;
    border:1px solid var(--border);
    border-radius:999px;
    background:#fff;
    font-size:14px;
    color:var(--text);
    transition:var(--transition);
}
.product-tab:hover,
.product-tab.active{
    background:var(--primary);
    border-color:var(--primary);
    color:#fff;
}
.product-detail h2{
    font-size:26px;
    font-weight:800;
    color:var(--primary);
    margin-bottom:14px;
}
.product-desc{
    font-size:15px;
    color:var(--text-light);
    line-height:1.85;
    margin-bottom:32px;
}
.product-features,
.product-list{margin-bottom:32px}
.product-features h3,
.product-list h3{
    font-size:18px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:16px;
    padding-left:12px;
    border-left:4px solid var(--primary);
    line-height:1.4;
}
.product-features ul{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:10px;
}
.product-features li{
    font-size:14px;
    padding:12px 16px;
    background:var(--primary-bg);
    border-radius:8px;
    color:var(--text);
}
.symbol-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(170px,1fr));
    gap:12px;
}
.symbol-item{
    padding:16px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius);
    text-align:center;
    font-size:14px;
    font-weight:500;
    color:var(--primary);
    transition:var(--transition);
}
.symbol-item:hover{border-color:var(--primary);background:var(--primary-bg)}
.product-overview{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:24px;
}
.product-overview-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:30px 26px;
    transition:var(--transition);
}
.product-overview-item:hover{
    border-color:var(--primary);
    box-shadow:var(--shadow);
    transform:translateY(-4px);
}
.product-overview-item h3{
    font-size:19px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:12px;
}
.product-overview-item p{
    font-size:14px;
    color:var(--text-light);
    line-height:1.75;
    margin-bottom:16px;
}

/* ============================================================
   内容页
   ============================================================ */
.content-page{max-width:920px;margin:0 auto}
.content-page h2{
    font-size:22px;
    font-weight:800;
    color:var(--primary);
    margin:38px 0 18px;
    padding-left:14px;
    border-left:4px solid var(--primary);
    line-height:1.4;
}
.content-page h2:first-child{margin-top:0}
.content-page p{
    font-size:15px;
    color:var(--text-light);
    line-height:1.9;
    margin-bottom:14px;
}

.timeline{padding-left:16px;margin-top:10px}
.timeline li{
    position:relative;
    padding:12px 0 12px 24px;
    border-left:2px solid var(--border);
    font-size:14px;
    color:var(--text-light);
    line-height:1.7;
}
.timeline li::before{
    content:'';
    position:absolute;
    left:-7px;top:20px;
    width:12px;height:12px;
    background:var(--primary);
    border:2px solid #fff;
    border-radius:50%;
    box-shadow:0 0 0 2px var(--primary);
}
.timeline strong{color:var(--primary)}

/* 监管信息卡片 */
.regulation-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:20px;
}
.reg-card{
    background:#fff;
    border:1px solid var(--border);
    border-left:4px solid var(--primary);
    border-radius:var(--radius);
    padding:22px 20px;
    transition:var(--transition);
}
.reg-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.reg-card h4{
    font-size:16px;
    color:var(--primary);
    margin-bottom:8px;
    font-weight:700;
    line-height:1.4;
}
.reg-card p{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.75;
    margin-bottom:6px;
}
.reg-card .reg-no{
    font-family:Consolas,Monaco,monospace;
    font-size:12.5px;
    color:var(--primary);
    background:var(--primary-bg);
    padding:3px 9px;
    border-radius:4px;
    display:inline-block;
    margin-top:4px;
}

/* 开户流程 */
.steps-flow{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
    gap:20px;
}
.step-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:28px 22px;
    text-align:center;
    transition:var(--transition);
}
.step-item:hover{
    border-color:var(--primary);
    box-shadow:var(--shadow);
    transform:translateY(-4px);
}
.step-num{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:48px;
    height:48px;
    background:var(--primary);
    color:#fff;
    font-size:20px;
    font-weight:800;
    border-radius:50%;
    margin-bottom:14px;
    box-shadow:0 6px 16px rgba(139,26,26,.25);
}
.step-item h4{
    font-size:16px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:8px;
}
.step-item p{
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.7;
}

/* FAQ */
.faq-list{
    max-width:900px;
    margin:0 auto;
    display:flex;
    flex-direction:column;
    gap:12px;
}
.faq-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius);
    overflow:hidden;
    transition:var(--transition);
}
.faq-item[open]{
    border-color:var(--primary);
    box-shadow:var(--shadow);
}
.faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:18px 52px 18px 22px;
    font-size:15px;
    font-weight:600;
    color:var(--text);
    position:relative;
    line-height:1.5;
    transition:var(--transition);
    user-select:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
    content:'+';
    position:absolute;
    right:22px;
    top:50%;
    transform:translateY(-50%);
    font-size:22px;
    color:var(--primary);
    font-weight:400;
    line-height:1;
    transition:var(--transition);
}
.faq-item[open] summary{
    color:var(--primary);
    background:var(--primary-bg);
}
.faq-item[open] summary::after{content:'−'}
.faq-item summary:hover{
    color:var(--primary);
    background:var(--primary-bg);
}
.faq-a{
    padding:16px 22px 20px;
    font-size:14px;
    color:var(--text-light);
    line-height:1.9;
    border-top:1px dashed var(--border);
}
.faq-a p{margin:0 0 10px}
.faq-a p:last-child{margin-bottom:0}
.faq-a ul{margin:0 0 10px 20px}
.faq-a ul li{list-style:disc;margin-bottom:6px}
.faq-a a{color:var(--primary);font-weight:500}

/* 文章详情 */
.article-content{max-width:920px;margin:0 auto}
.article-thumb{
    margin-bottom:28px;
    border-radius:var(--radius-lg);
    overflow:hidden;
}
.article-body{
    font-size:15.5px;
    line-height:1.95;
    color:var(--text);
    word-break:break-word;
    white-space:pre-wrap;
}
.article-body p{margin:0 0 14px;white-space:pre-wrap}
.article-body p:last-child{margin-bottom:0}
.article-body img{margin:18px auto;border-radius:var(--radius);height:auto}
.article-body h2,
.article-body h3{margin:26px 0 14px;color:var(--primary);line-height:1.4}
.article-body ul,
.article-body ol{margin:0 0 16px 24px}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-back{
    margin-top:44px;
    padding-top:22px;
    border-top:1px solid var(--border);
}

/* 联系页 */
.contact-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:40px;
    align-items:start;
}
.contact-list li{
    display:flex;
    align-items:flex-start;
    gap:10px;
    padding:14px 0;
    font-size:15px;
    color:var(--text-light);
    border-bottom:1px solid var(--border);
    line-height:1.7;
}
.contact-list li:last-child{border-bottom:0}
.contact-icon{font-size:17px;flex-shrink:0;line-height:1.7}
.contact-form .form-group{margin-bottom:18px}
.contact-form label{
    display:block;
    font-size:14px;
    font-weight:500;
    color:var(--text);
    margin-bottom:6px;
}
.contact-form input,
.contact-form textarea{
    width:100%;
    padding:12px 16px;
    border:1px solid var(--border);
    border-radius:var(--radius);
    font-size:14px;
    font-family:inherit;
    color:var(--text);
    background:#fff;
    transition:var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus{
    outline:none;
    border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(139,26,26,.08);
}

/* ============================================================
   底部
   ============================================================ */
.site-footer{
    background:#fff;
    border-top:1px solid var(--border);
    padding:60px 0 0;
    margin-top:80px;
}
.footer-grid{
    display:grid;
    grid-template-columns:1.8fr 1fr 1.4fr;
    gap:48px;
    padding-bottom:44px;
}
.footer-col h4{
    font-size:16px;
    font-weight:800;
    color:var(--primary);
    margin-bottom:18px;
    position:relative;
    padding-bottom:10px;
}
.footer-col h4::after{
    content:'';
    position:absolute;
    left:0;bottom:0;
    width:28px;height:2px;
    background:var(--primary);
    border-radius:2px;
}
.footer-col p{font-size:13.5px;color:var(--text-light);line-height:1.85}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:var(--text-light)}
.footer-col ul li a:hover{color:var(--primary)}
.contact-info li{
    display:flex;
    align-items:flex-start;
    gap:8px;
    font-size:13.5px;
    color:var(--text-light);
    line-height:1.7;
}
.contact-info li span{flex-shrink:0}
.footer-bottom{
    border-top:1px solid var(--border);
    padding:22px 0;
    text-align:center;
    font-size:13px;
    color:var(--text-muted);
    line-height:1.8;
}
.footer-bottom a{color:var(--text-muted);margin:0 2px}
.footer-bottom a:hover{color:var(--primary)}

/* ============================================================
   手机端固定底部按钮
   ============================================================ */
.mobile-bottom-bar{
    display:none;
    position:fixed;
    bottom:0;left:0;right:0;
    background:#fff;
    border-top:1px solid var(--border);
    padding:10px 14px;
    gap:10px;
    z-index:2000;
    box-shadow:0 -2px 12px rgba(0,0,0,.08);
    padding-bottom:calc(10px + env(safe-area-inset-bottom,0px));
}
.mobile-bottom-bar .btn{flex:1;padding:11px 14px}

/* ============================================================
   管理后台
   ============================================================ */
.admin-page{background:#f5f5f5}
.admin-login-page{
    display:flex;
    align-items:center;
    justify-content:center;
    min-height:100vh;
    background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
    padding:20px;
}
.admin-login-box{
    width:100%;
    max-width:400px;
    background:#fff;
    padding:44px 40px;
    border-radius:14px;
    box-shadow:0 20px 60px rgba(0,0,0,.25);
}
.admin-login-box h1{
    font-size:22px;
    text-align:center;
    color:var(--primary);
    margin-bottom:28px;
}
.admin-login-box .form-group{margin-bottom:18px}
.admin-login-box label{
    display:block;
    font-size:14px;
    font-weight:500;
    margin-bottom:6px;
}
.admin-login-box input{
    width:100%;
    padding:11px 14px;
    border:1px solid var(--border);
    border-radius:var(--radius);
    font-size:14px;
    font-family:inherit;
}
.admin-login-box input:focus{
    outline:none;
    border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(139,26,26,.08);
}

.admin-layout{display:flex;min-height:100vh}
.admin-sidebar{
    width:230px;
    flex-shrink:0;
    background:var(--primary-dark);
    color:#fff;
    position:fixed;
    top:0;bottom:0;left:0;
    overflow-y:auto;
}
.admin-logo{
    padding:22px 24px;
    font-size:18px;
    font-weight:800;
    letter-spacing:1px;
    border-bottom:1px solid rgba(255,255,255,.1);
}
.admin-sidebar nav a{
    display:block;
    padding:14px 24px;
    font-size:14px;
    color:rgba(255,255,255,.78);
    transition:var(--transition);
}
.admin-sidebar nav a:hover,
.admin-sidebar nav a.active{
    background:rgba(255,255,255,.1);
    color:#fff;
}
.admin-main{
    flex:1;
    margin-left:230px;
    padding:30px;
    min-width:0;
}
.admin-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:12px;
    margin-bottom:28px;
}
.admin-header h1{font-size:24px;color:var(--primary)}
.admin-stats{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
    gap:20px;
    margin-bottom:30px;
}
.stat-card{
    background:#fff;
    padding:26px;
    border-radius:var(--radius);
    text-align:center;
    box-shadow:0 1px 4px rgba(0,0,0,.06);
}
.stat-num{font-size:28px;font-weight:800;color:var(--primary);line-height:1.3}
.stat-label{font-size:13px;color:var(--text-muted);margin-top:6px}
.admin-card{
    background:#fff;
    padding:28px;
    border-radius:var(--radius);
    margin-bottom:24px;
    box-shadow:0 1px 4px rgba(0,0,0,.06);
}
.admin-card h3{
    font-size:17px;
    color:var(--primary);
    margin-bottom:18px;
    padding-bottom:12px;
    border-bottom:1px solid var(--border);
}
.admin-card .form-group{margin-bottom:16px}
.admin-card label{
    display:block;
    font-size:13px;
    font-weight:500;
    margin-bottom:6px;
    color:var(--text);
}
.admin-card input[type=text],
.admin-card input[type=url],
.admin-card input[type=email],
.admin-card textarea,
.admin-card select{
    width:100%;
    padding:10px 14px;
    border:1px solid var(--border);
    border-radius:var(--radius);
    font-size:14px;
    font-family:inherit;
    background:#fff;
}
.admin-card input:focus,
.admin-card textarea:focus,
.admin-card select:focus{
    outline:none;
    border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(139,26,26,.08);
}
.admin-table-wrap{
    background:#fff;
    border-radius:var(--radius);
    overflow-x:auto;
    box-shadow:0 1px 4px rgba(0,0,0,.06);
}
.admin-table{
    width:100%;
    border-collapse:collapse;
    font-size:14px;
    min-width:640px;
}
.admin-table th{
    background:var(--primary-bg);
    padding:14px;
    text-align:left;
    font-weight:700;
    color:var(--primary);
    font-size:13px;
    white-space:nowrap;
}
.admin-table td{padding:14px;border-bottom:1px solid var(--border)}
.admin-table tr:last-child td{border-bottom:0}
.admin-table tr:hover td{background:#fafafa}
.alert{
    padding:12px 18px;
    border-radius:var(--radius);
    margin-bottom:20px;
    font-size:14px;
}
.alert-success{background:#e8f5e9;color:#2e7d32;border:1px solid #c8e6c9}
.alert-error{background:#ffebee;color:#c62828;border:1px solid #ffcdd2}
.quick-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
    gap:16px;
}
.quick-item{
    display:block;
    padding:24px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius);
    text-align:center;
    font-size:14px;
    font-weight:500;
    color:var(--text);
    transition:var(--transition);
}
.quick-item:hover{
    border-color:var(--primary);
    background:var(--primary-bg);
    color:var(--primary);
}

/* ============================================================
   响应式 - 平板
   ============================================================ */
@media (max-width:992px){
    .header-inner{gap:16px;min-height:70px}
    .main-nav > ul > li > a{padding:10px 12px;font-size:14px}
    .header-actions .btn{padding:8px 14px;font-size:13px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .contact-grid{grid-template-columns:1fr;gap:32px}
    .intro-wrap{grid-template-columns:1fr;gap:36px}
}

/* ============================================================
   响应式 - 手机
   ============================================================ */
@media (max-width:768px){
    body{padding-bottom:70px;font-size:14.5px}

    .header-inner{
        flex-wrap:nowrap;
        min-height:64px;
        gap:10px;
    }
    .logo-text{font-size:20px}
    .logo img{max-height:40px}
    .logo{min-width:0;overflow:hidden}
    .logo-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .logo img{max-width:38vw;height:auto}

    .header-actions{display:none}

    .mobile-qq{
        display:inline-flex;
        margin-left:auto;
        max-width:50vw;
        overflow:hidden;
        text-overflow:ellipsis;
    }
    .mobile-qq .qq-text{
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
    }

    .mobile-toggle{display:inline-flex}

    /* 导航抽屉 */
    .main-nav{
        position:fixed;
        top:64px;left:0;right:0;
        background:#fff;
        border-bottom:1px solid var(--border);
        box-shadow:0 10px 30px rgba(0,0,0,.1);
        max-height:calc(100vh - 64px);
        overflow-y:auto;
        padding:10px 0 20px;
        display:none;
        z-index:999;
    }
    .main-nav.open{display:block}
    .main-nav > ul{
        flex-direction:column;
        gap:0;
        align-items:stretch;
    }
    .main-nav > ul > li > a{
        display:flex;
        align-items:center;
        justify-content:space-between;
        padding:14px 22px;
        border-radius:0;
        font-size:15px;
        width:100%;
        box-sizing:border-box;
    }

    /* 手机端子菜单 - 全宽展开，禁止位移 */
    .sub-menu{
        position:static !important;
        left:auto !important;
        right:auto !important;
        top:auto !important;
        transform:none !important;
        opacity:1 !important;
        visibility:visible !important;
        box-shadow:none !important;
        border:0 !important;
        border-radius:0 !important;
        padding:4px 0 8px !important;
        margin:0 !important;
        background:var(--primary-bg) !important;
        display:none;
        min-width:0 !important;
        width:100% !important;
    }
    .sub-menu::before{display:none !important}
    .has-sub.open .sub-menu{display:block !important}
    .sub-menu li{width:100%;display:block}
    .sub-menu li a{
        display:flex !important;
        align-items:center;
        gap:10px;
        width:100% !important;
        padding:12px 22px 12px 42px !important;
        font-size:14px !important;
        color:var(--text) !important;
        background:transparent !important;
        border-radius:0 !important;
        white-space:normal !important;
        box-sizing:border-box;
    }
    .sub-menu li a:hover,
    .sub-menu li a:active{
        background:rgba(139,26,26,.08) !important;
        color:var(--primary) !important;
    }

    /* Banner */
    .hero-banner{padding:60px 0}
    .hero-content h1{font-size:28px;letter-spacing:1px}
    .hero-content p{font-size:15px;margin-bottom:26px}
    .page-banner{padding:40px 0}
    .page-banner h1{font-size:24px}
    .error-banner h1{font-size:64px}

    .section{padding:48px 0}
    .section-title{font-size:22px}
    .section-subtitle{font-size:14px;margin-bottom:32px}

    /* 平台介绍 */
    .intro-wrap{grid-template-columns:1fr;gap:28px}
    .intro-text h3{font-size:18px}
    .intro-text p{font-size:14px}
    .intro-stats{grid-template-columns:repeat(2,1fr);gap:12px}
    .intro-stat{padding:20px 12px}
    .intro-stat .stat-num{font-size:22px}
    .intro-stat .stat-label{font-size:12px}

    /* 全球办公室 */
    .offices-grid{grid-template-columns:1fr;gap:14px}
    .office-card{padding:20px 18px}
    .office-flag{font-size:22px}
    .office-head h3{font-size:15.5px}
    .office-badge{font-size:10px;padding:2px 7px}

    /* 卡片网格 */
    .product-grid{grid-template-columns:repeat(2,1fr);gap:14px}
    .product-card{padding:22px 14px}
    .product-icon{width:52px;height:52px;font-size:26px;margin-bottom:12px}
    .product-card h3{font-size:15px}
    .product-card p{font-size:12.5px}

    .advantage-grid{grid-template-columns:1fr;gap:14px}
    .advantage-item{padding:24px 18px}
    .adv-icon{width:56px;height:56px;font-size:28px;margin-bottom:12px}

    .news-grid{grid-template-columns:1fr;gap:18px}
    .news-list-item{flex-direction:column;gap:0}
    .news-list-thumb{width:100%;aspect-ratio:16/9}
    .news-list-body{padding:18px}

    /* 产品页 */
    .product-tabs{gap:8px;margin-bottom:28px}
    .product-tab{padding:8px 16px;font-size:13px}
    .product-detail h2{font-size:22px}
    .symbol-grid{grid-template-columns:repeat(2,1fr)}
    .product-overview{grid-template-columns:1fr}

    /* 内容页 */
    .content-page h2{font-size:19px;margin-top:30px}

    /* 监管卡片 */
    .regulation-grid{grid-template-columns:1fr;gap:14px}
    .reg-card{padding:18px 16px}

    /* 开户流程 */
    .steps-flow{grid-template-columns:1fr;gap:12px}
    .step-item{padding:22px 18px}
    .step-num{width:42px;height:42px;font-size:18px;margin-bottom:10px}

    /* FAQ */
    .faq-item summary{padding:15px 46px 15px 16px;font-size:14.5px}
    .faq-item summary::after{right:16px;font-size:20px}
    .faq-a{padding:14px 16px 18px;font-size:13.5px}

    /* 底部 */
    .site-footer{margin-top:40px;padding-top:40px}
    .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
    .footer-bottom{font-size:12px;padding:18px 0}

    .mobile-bottom-bar{display:flex}
}

/* 超小屏 */
@media (max-width:420px){
    .product-grid{grid-template-columns:1fr}
    .symbol-grid{grid-template-columns:1fr}
    .hero-content h1{font-size:24px}
    .container{padding:0 14px}
    .admin-login-box{padding:32px 24px}

    .mobile-qq{padding:5px 9px;gap:3px}
    .mobile-qq .qq-text{font-size:11.5px;letter-spacing:0}
    .mobile-qq .qq-icon{font-size:13px}
    .logo-text{font-size:17px}

    .intro-stats{grid-template-columns:1fr}
    .intro-stat .stat-num{font-size:24px}
}