/* ===========================
   向日葵远程官网模板 - 主样式
   符合谷歌SEO/GEO标准
   =========================== */

/* 变量定义 */
:root {
    --primary: #1677ff;
    --primary-hover: #4096ff;
    --primary-dark: #0958d9;
    --secondary: #ff6b35;
    --text-primary: #1a1a2e;
    --text-secondary: #555;
    --text-light: #888;
    --bg-white: #fff;
    --bg-light: #f5f7fa;
    --bg-dark: #0d1b2a;
    --bg-nav: #001529;
    --border: #e8e8e8;
    --shadow: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 32px rgba(0,0,0,0.15);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.7;
    background: var(--bg-white);
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* ===== 顶部公告栏 ===== */
.top-notice {
    background: linear-gradient(90deg, #0d1b2a 0%, #1677ff 100%);
    color: #fff;
    font-size: 13px;
    padding: 8px 0;
    text-align: center;
}
.top-notice a { color: #ffe58f; }
.top-notice a:hover { color: #fff; }
.top-notice span { margin-right: 8px; opacity: 0.8; }

/* ===== 头部导航 ===== */
.header {
    background: var(--bg-white);
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 999;
}
.header .container {
    display: flex;
    align-items: center;
    height: 68px;
    gap: 20px;
}
.logo { flex-shrink: 0; }
.logo img { height: 36px; width: auto; }
.nav { flex: 1; }
.nav ul { display: flex; align-items: center; gap: 4px; }
.nav li { position: relative; }
.nav a {
    display: block;
    padding: 8px 14px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: var(--radius);
    white-space: nowrap;
}
.nav a:hover, .nav a.active { color: var(--primary); background: #e6f4ff; }
.nav .btn-nav-download {
    background: var(--primary);
    color: #fff !important;
    padding: 7px 18px;
}
.nav .btn-nav-download:hover { background: var(--primary-hover); color: #fff; }

/* 下拉菜单 */
.has-dropdown { position: relative; }
.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    padding: 8px 0;
    z-index: 1000;
}
.has-dropdown:hover .dropdown { display: block; }
.dropdown li a {
    padding: 9px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: 0;
}
.dropdown li a:hover { background: #f0f7ff; color: var(--primary); }

/* 头部右侧按钮 */
.header-actions { display: flex; gap: 10px; flex-shrink: 0; }
.btn-login {
    padding: 7px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-secondary);
}
.btn-login:hover { border-color: var(--primary); color: var(--primary); }
.btn-register {
    padding: 7px 18px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: 14px;
}
.btn-register:hover { background: var(--primary-hover); color: #fff; }
.mobile-menu-btn { display: none; font-size: 22px; color: var(--text-primary); }

/* ===== 面包屑 ===== */
.breadcrumb {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    font-size: 13px;
    color: var(--text-light);
}
.breadcrumb ol { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .separator { color: #ccc; }

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 26px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(22,119,255,0.4); }
.btn-secondary { background: transparent; border: 2px solid rgba(255,255,255,0.7); color: #fff; }
.btn-secondary:hover { background: rgba(255,255,255,0.15); color: #fff; }
.btn-block { width: 100%; }

/* ===== 通用区块标题 ===== */
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: 32px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.section-header p { font-size: 16px; color: var(--text-secondary); }
.section-header .more-link { float: right; font-size: 14px; color: var(--primary); margin-top: 8px; }

/* ===== 首页 Banner ===== */
.banner { position: relative; overflow: hidden; }
.swiper-container { position: relative; }
.swiper-wrapper { display: flex; }
.swiper-slide { min-width: 100%; }
.banner-bg {
    min-height: 520px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
}
.banner-bg-2 {
    background: linear-gradient(135deg, #0d1b2a 0%, #1a3a5c 50%, #1677ff 100%);
}
.banner-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
}
.banner-content {
    position: relative;
    z-index: 2;
    color: #fff;
    padding: 60px 0;
    max-width: 600px;
}
.banner-tag {
    display: inline-block;
    background: var(--secondary);
    color: #fff;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.banner-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.banner-subtitle {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #e6f4ff;
}
.banner-desc { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 20px; }
.banner-features {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.banner-features li { font-size: 15px; color: rgba(255,255,255,0.9); }
.check-icon { color: #52c41a; margin-right: 6px; font-weight: 700; }
.banner-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* 轮播控制 */
.swiper-pagination {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}
.swiper-pagination-bullet {
    width: 10px; height: 10px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}
.swiper-pagination-bullet.active { background: #fff; width: 28px; border-radius: 5px; }
.swiper-button-prev, .swiper-button-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px; height: 44px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}
.swiper-button-prev { left: 20px; }
.swiper-button-next { right: 20px; }
.swiper-button-prev:hover, .swiper-button-next:hover { background: rgba(255,255,255,0.35); }
.swiper-button-prev::before { content: "‹"; }
.swiper-button-next::before { content: "›"; }

/* ===== 数据统计区 ===== */
.stats-bar {
    background: linear-gradient(90deg, #0d1b2a 0%, #1677ff 100%);
    padding: 36px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}
.stat-item { color: #fff; }
.stat-num { font-size: 48px; font-weight: 800; color: #fff; line-height: 1; }
.stat-unit { font-size: 20px; font-weight: 600; color: #ffe58f; }
.stat-item p { font-size: 14px; color: rgba(255,255,255,0.75); margin-top: 6px; }

/* ===== 核心功能区 ===== */
.core-features { padding: 80px 0; background: var(--bg-white); }
.features-tabs { }
.tab-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
    flex-wrap: wrap;
}
.tab-btn {
    padding: 12px 28px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius) var(--radius) 0 0;
    transition: var(--transition);
    position: relative;
    bottom: -2px;
    border-bottom: 2px solid transparent;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom: 2px solid var(--primary); background: #f0f7ff; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }
.tab-pane-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.tab-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.badge-new {
    display: inline-block;
    background: var(--secondary);
    color: #fff;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}
.tab-text p { color: var(--text-secondary); margin-bottom: 20px; font-size: 16px; }
.feature-list { margin-bottom: 28px; }
.feature-list li {
    padding: 8px 0;
    padding-left: 22px;
    position: relative;
    color: var(--text-secondary);
    font-size: 15px;
    border-bottom: 1px dashed #f0f0f0;
}
.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}
.tab-img img { border-radius: var(--radius-lg); box-shadow: var(--shadow-hover); width: 100%; }

/* ===== 安全保障区 ===== */
.security-section { padding: 80px 0; background: var(--bg-light); }
.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.security-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.security-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.security-icon { font-size: 40px; margin-bottom: 16px; }
.security-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.security-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ===== 客户案例区 ===== */
.clients-section { padding: 80px 0; background: var(--bg-white); }
.industry-tabs { }
.industry-nav {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.industry-btn {
    padding: 10px 24px;
    border: 2px solid var(--border);
    border-radius: 24px;
    font-size: 15px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.industry-btn:hover, .industry-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: #e6f4ff;
}
.industry-content { background: var(--bg-light); border-radius: var(--radius-lg); padding: 40px; }
.industry-text h3 { font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.industry-text ul { margin-bottom: 24px; }
.industry-text li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
}
.industry-text li::before { content: "·"; position: absolute; left: 0; font-size: 20px; color: var(--primary); line-height: 1.2; }

/* ===== 资讯列表区 ===== */
.news-section { padding: 80px 0; background: var(--bg-light); }
.news-section .section-header { display: flex; justify-content: space-between; align-items: center; text-align: left; margin-bottom: 36px; }
.news-section .section-header h2 { margin-bottom: 0; }
.news-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-list-3col { grid-template-columns: repeat(3, 1fr); }
.news-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.news-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.news-item > a { display: block; }
.news-img { overflow: hidden; aspect-ratio: 16/9; }
.news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.news-item:hover .news-img img { transform: scale(1.05); }
.news-info { padding: 18px; }
.news-info h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-excerpt { font-size: 13px; color: var(--text-light); margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-info .date { font-size: 12px; color: var(--text-light); }

/* ===== 列表页布局 ===== */
.main-content { padding: 40px 0 60px; }
.list-layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.list-header { margin-bottom: 30px; }
.list-header h1 { font-size: 26px; font-weight: 700; margin-bottom: 10px; border-left: 4px solid var(--primary); padding-left: 14px; }
.list-desc { font-size: 14px; color: var(--text-secondary); }
.article-list { display: flex; flex-direction: column; gap: 24px; }
.article-item {
    display: flex;
    gap: 20px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.article-img { flex-shrink: 0; width: 220px; height: 145px; overflow: hidden; border-radius: var(--radius); }
.article-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.article-item:hover .article-img img { transform: scale(1.05); }
.article-info { flex: 1; }
.article-info h2 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.article-info h2 a:hover { color: var(--primary); }
.article-excerpt { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-meta { display: flex; gap: 16px; font-size: 13px; color: var(--text-light); }

/* 分页 */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 40px; }
.page-num, .page-prev, .page-next {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.page-num:hover, .page-prev:hover, .page-next:hover { border-color: var(--primary); color: var(--primary); }
.page-num.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.page-ellipsis { color: var(--text-light); }

/* ===== 侧边栏 ===== */
.list-sidebar, .show-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}
.sidebar-widget h3 { font-size: 17px; font-weight: 700; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); }
.sidebar-widget p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; }
.sidebar-list { display: flex; flex-direction: column; gap: 10px; }
.sidebar-list li a {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}
.sidebar-list li a:hover { color: var(--primary); }
.sidebar-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--primary);
    color: #fff;
    border-radius: 4px;
    font-size: 12px;
    flex-shrink: 0;
    margin-top: 1px;
}
.sidebar-list li a img { width: 60px; height: 40px; object-fit: cover; border-radius: 4px; flex-shrink: 0; }
.download-quick { display: flex; flex-direction: column; gap: 10px; }
.download-quick li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.download-quick li a:hover { border-color: var(--primary); color: var(--primary); background: #f0f7ff; }
.download-quick li a img { width: 24px; height: 24px; object-fit: contain; }

/* ===== 内容页布局 ===== */
.show-layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.article-detail { background: var(--bg-white); }
.article-header { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.article-header h1 { font-size: 28px; font-weight: 700; line-height: 1.4; margin-bottom: 14px; }
.article-meta { display: flex; gap: 20px; flex-wrap: wrap; }
.meta-item { display: flex; align-items: center; gap: 5px; font-size: 13px; color: var(--text-light); }
.meta-item svg { flex-shrink: 0; }
.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: #333;
}
.article-content h2 { font-size: 22px; font-weight: 700; margin: 28px 0 14px; color: var(--text-primary); }
.article-content h3 { font-size: 18px; font-weight: 600; margin: 22px 0 12px; color: var(--text-primary); }
.article-content p { margin-bottom: 16px; }
.article-content img { border-radius: var(--radius); margin: 20px 0; box-shadow: var(--shadow); }
.article-content ul, .article-content ol { margin: 14px 0 14px 20px; }
.article-content li { margin-bottom: 8px; }
.article-content strong { color: var(--text-primary); }
.article-footer { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tags { margin-bottom: 16px; font-size: 14px; }
.article-tags a {
    display: inline-block;
    padding: 4px 12px;
    background: #f0f7ff;
    color: var(--primary);
    border-radius: 4px;
    margin: 0 6px 6px 0;
    font-size: 13px;
}
.article-share { margin-bottom: 20px; font-size: 14px; }
.share-btn {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 4px;
    font-size: 13px;
    margin: 0 6px;
    color: #fff;
}
.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-qq { background: #12b7f5; }
.article-prev-next { font-size: 14px; }
.prev-article, .next-article { padding: 10px 0; border-bottom: 1px dashed var(--border); color: var(--text-secondary); }
.prev-article a, .next-article a { color: var(--text-primary); }
.prev-article a:hover, .next-article a:hover { color: var(--primary); }

/* 相关推荐 */
.related-section { padding: 60px 0; background: var(--bg-light); }
.related-section h2 { font-size: 24px; font-weight: 700; margin-bottom: 28px; }

/* ===== 下载页 ===== */
.download-hero {
    background: linear-gradient(135deg, #0d1b2a 0%, #1677ff 100%);
    color: #fff;
    padding: 70px 0;
    text-align: center;
}
.download-hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 14px; }
.download-hero p { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 30px; }
.download-hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.download-platforms { padding: 80px 0; background: var(--bg-white); }
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.platform-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.platform-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.platform-icon { margin-bottom: 20px; }
.platform-icon img { width: 72px; height: 72px; object-fit: contain; margin: 0 auto; }
.platform-card h2 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.platform-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; }
.version-info { font-size: 13px; color: var(--text-light); margin-bottom: 20px; }
.update-date { font-size: 12px; color: var(--text-light); margin-top: 12px; }
.qrcode-wrap { margin: 16px auto; }
.qrcode { width: 130px; height: 130px; margin: 0 auto; border: 4px solid var(--border); border-radius: var(--radius); }

/* 版本对比表 */
.compare-section { padding: 80px 0; background: var(--bg-light); }
.compare-table-wrap { overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: center; border-bottom: 1px solid var(--border); font-size: 15px; }
.compare-table th { background: var(--bg-nav); color: #fff; font-weight: 600; font-size: 16px; }
.compare-table th:first-child { text-align: left; }
.compare-table td:first-child { text-align: left; font-weight: 500; }
.compare-table tr:last-child td { border-bottom: none; padding: 24px 20px; }
.compare-table .check { color: #52c41a; font-size: 18px; font-weight: 700; }
.compare-table .cross { color: #ff4d4f; font-size: 18px; }
.compare-table tbody tr:hover { background: #f8fbff; }

/* ===== 底部 Footer ===== */
.footer { background: var(--bg-nav); color: rgba(255,255,255,0.75); padding: 60px 0 0; }
.footer-top { display: grid; grid-template-columns: 280px 1fr; gap: 60px; padding-bottom: 50px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo img { height: 36px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-desc { font-size: 14px; line-height: 1.7; margin-bottom: 20px; color: rgba(255,255,255,0.6); }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 4px; }
.footer-contact a { color: #ffe58f; }
.footer-links-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col li a { font-size: 14px; color: rgba(255,255,255,0.6); }
.footer-col li a:hover { color: #fff; }
.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); margin: 0 6px; }
.footer-bottom a:hover { color: #fff; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .security-grid { grid-template-columns: repeat(2, 1fr); }
    .platform-grid { grid-template-columns: repeat(2, 1fr); }
    .tab-pane-inner { grid-template-columns: 1fr; gap: 30px; }
    .footer-top { grid-template-columns: 1fr; gap: 40px; }
    .footer-links-wrap { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .header .container { gap: 10px; }
    .nav { display: none; }
    .header-actions { display: none; }
    .mobile-menu-btn { display: block; }
    .banner-title { font-size: 32px; }
    .banner-subtitle { font-size: 20px; }
    .section-header h2 { font-size: 24px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .news-list { grid-template-columns: 1fr; }
    .list-layout { grid-template-columns: 1fr; }
    .list-sidebar { display: none; }
    .show-layout { grid-template-columns: 1fr; }
    .show-sidebar { display: none; }
    .article-item { flex-direction: column; }
    .article-img { width: 100%; height: 200px; }
    .platform-grid { grid-template-columns: 1fr; }
    .security-grid { grid-template-columns: 1fr; }
    .footer-links-wrap { grid-template-columns: repeat(2, 1fr); }
    .compare-table th, .compare-table td { padding: 12px 10px; font-size: 13px; }
}

@media (max-width: 480px) {
    .banner-content { padding: 40px 0; }
    .banner-title { font-size: 26px; }
    .banner-features { gap: 10px; }
    .banner-btns { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-num { font-size: 36px; }
    .footer-links-wrap { grid-template-columns: 1fr; }
}