/* ============================================================
   main.css — Byekey GOP 主题基座
   设计令牌来自 gateopenerfactory.com 实测规格（红色统一替换为主题蓝 #007bff）
   面板/卡片细化样式见 nav-upgrade.css；产品卡见 bk-products.css；
   详情/归档见 bk-single.css；字体见 bk-fonts.css
   ============================================================ */

:root{
  --brand:#007bff;            /* 主题蓝（勿改回品牌红） */
  --brand-dark:#0062cc;
  --logo-blue:#22345A;        /* 站点标识图实测取色（rgb 34,52,90），社媒图标 hover 用这个 */
  --ink:#1A1A1A;
  --sec:#666666;
  --line:#E8E8E8;
  --gray:#F5F5F5;
  --hover:#F0F6FF;
  --shadow-card:0 2px 16px rgba(0,0,0,.08);
  --ease:cubic-bezier(.4,0,.2,1);
  /* --header-h 只表示主栏自身高度（.bk-header-inner），吸顶元素避让不要用这个。
     v1.3.28：吸顶避让统一用 --header-full = 整条固定头的真实高度
     = 顶栏 38（.bk-topbar-in min-height）+ 主栏 80 + 下边框 1 = 119px。
     原先 pdp.css / legal.css 直接拿 --header-h(80) 当整头高度，实测被压住 39/19px。 */
  --header-h:80px;
  --header-full:119px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-size:15px;line-height:1.6;color:var(--ink);background:#fff}
img{max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4,h5,h6{color:var(--ink);margin:0 0 .6em;line-height:1.25}
p{margin:0 0 1em}
ul{margin:0;padding:0}

.bk-container{max-width:1280px;margin:0 auto;padding:0 24px}

/* ============ 顶栏 ============ */
.bk-topbar{background:var(--ink);color:#fff;font-size:13px}
.bk-topbar-in{display:flex;justify-content:space-between;align-items:center;min-height:38px;gap:16px;flex-wrap:wrap}
.bk-topbar-tag{opacity:.85;font-weight:500;letter-spacing:.02em}
.bk-topbar-links{display:flex;align-items:center;gap:20px}
.bk-topbar-links a{color:rgba(255,255,255,.85);transition:color .2s}
.bk-topbar-links a:hover{color:#fff}
.bk-topbar-links .bk-wa{font-weight:600}
/* v1.3.40 顶栏社媒图标：深色底上先做成半透明白圈，hover 变白底 + LOGO 蓝（藏蓝直接画在黑底上看不见） */
.bk-topbar-sep{width:1px;height:16px;background:rgba(255,255,255,.25);margin:0 2px}
.bk-topbar-social{display:flex;align-items:center;gap:8px}
.bk-topbar-social .bk-soc{width:26px;height:26px;background:rgba(255,255,255,.12);color:rgba(255,255,255,.75)}
.bk-topbar-social .bk-soc:hover{background:#fff;color:var(--logo-blue)}

/* ============ 主栏 ============ */
/* 1.3.14：主栏**去掉自己的 backdrop-filter**。它是导航面板的祖先，带 blur 时会成为 backdrop root ——
   面板的磨砂就只能采到这条白条自己，首屏大标题会**原样清晰**地透过来（实测 tone14/live-d-hero.png）。
   去掉后 backdrop root 回到视口，面板的 blur 才真的糊（tone14/live-e-hero.png）。
   观感几乎不变：透明度从 .92 提到 .96，本来也看不出磨砂；滚动后 .scrolled 是 .98。 */
.bk-header{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;transition:box-shadow .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease)}
.bk-header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 4px 20px rgba(0,0,0,.05);border-bottom-color:var(--line)}
.bk-header-inner{position:relative;display:flex;justify-content:space-between;align-items:center;height:var(--header-h)}

.bk-logo{flex:none;display:flex;align-items:center}
.bk-logo img{max-height:46px;width:auto;object-fit:contain;display:block}
.bk-logo-text{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:.01em}
.bk-logo-text:hover{color:var(--brand)}

.bk-desktop-nav{display:flex;align-items:center;height:100%;position:static}

/* ---- 一级导航 ---- */
.top-nav{display:flex;align-items:center;height:100%;margin:0;padding:0;list-style:none;gap:6px}
.top-nav>li{position:relative;display:flex;align-items:center;height:100%;font-size:16px;font-weight:600}
.top-nav>li>a{display:flex;align-items:center;gap:6px;color:var(--ink);padding:8px 14px;border-radius:8px;transition:color .2s,background-color .2s}
.top-nav>li:hover>a,.top-nav>li.tb-nav-open>a,.top-nav>li.current-menu-item>a{color:var(--brand)}
.top-nav .chev{transition:transform .2s var(--ease);flex:none}
.top-nav>li:hover .chev,.top-nav>li.tb-nav-open .chev{transform:rotate(180deg)}
.top-nav .sub-menu .chev{display:none}
.top-nav>li.current-menu-ancestor>a{color:var(--brand)}

/* ---- 下拉面板基座（白底+蓝顶边+大柔光+上浮淡入 = GOP 签名）---- */
.top-nav .sub-menu{position:absolute;top:100%;left:0;min-width:260px;max-width:min(340px,90vw);
  background:#fff;border-top:3px solid var(--brand);box-shadow:0 8px 32px rgba(0,0,0,.12);
  margin:0;padding:12px 0;list-style:none;border-radius:0 0 12px 12px;z-index:1000;
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);
  transition:opacity .2s var(--ease),visibility .2s var(--ease),transform .2s var(--ease)}
.top-nav li:hover>.sub-menu,.top-nav li.tb-nav-open>.sub-menu,.top-nav li:focus-within>.sub-menu{
  opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}

/* ---- Mega 面板：锚定 header-inner，全容器宽 ---- */
.top-nav>li.tb-nav-2,.top-nav>li.tb-nav-3{position:static}
.top-nav>li.tb-nav-2>.sub-menu,.top-nav>li.tb-nav-3>.sub-menu{
  width:100%;max-width:none;min-width:0;left:0;display:flex;flex-wrap:wrap;align-items:flex-start}
.top-nav .sub-menu .sub-menu{position:static;opacity:1;visibility:visible;pointer-events:auto;transform:none;
  box-shadow:none;border:0;padding:6px 0 0;width:auto;max-width:none;min-width:0;background:transparent;border-radius:0;display:block}
.top-nav .sub-menu .sub-menu>li{display:block}
.top-nav .sub-menu .sub-menu a{display:flex;align-items:flex-start;gap:8px;padding:8px 14px;border-left:3px solid transparent;
  border-radius:8px;font-size:14px;font-weight:500;color:var(--ink)}
.top-nav .sub-menu .sub-menu a:hover{background:var(--hover);border-left-color:var(--brand);color:var(--brand)}
.tb-nav-3 .sub-menu .m-info,.tb-nav-2 .sub-menu .m-info{min-width:0}
.tb-nav-2 .sub-menu>li>a{display:flex;align-items:flex-start;gap:12px}
.tb-nav-2 .m-info{flex:1;width:0}
.tb-nav-3 .sub-menu>li>a{display:block}

/* ---- 条目通用文字 ---- */
.m-desc{margin:0}
.m-info{font-size:15px;font-weight:600;color:var(--ink);line-height:1.35}

/* ---- CTA & 汉堡 ---- */
.bk-header-actions{display:flex;align-items:center;gap:14px}
.bk-btn-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;
  font-size:14px;font-weight:700;padding:11px 22px;border-radius:999px;border:0;cursor:pointer;
  transition:background-color .2s,transform .2s var(--ease),box-shadow .2s}
.bk-btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,123,255,.28)}
.bk-menu-btn{display:none;flex-direction:column;gap:4px;padding:10px;background:none;border:0;cursor:pointer}
.bk-menu-btn .bar{width:24px;height:2px;background:var(--ink);transition:all .3s var(--ease)}

.bk-header-lang{position:relative;display:flex;align-items:center}
.bk-header-lang .trp-shortcode-switcher__wrapper{position:relative;display:inline-flex;align-items:center;border:none}
.bk-header-lang .trp-shortcode-anchor{display:none !important}
.bk-header-lang .trp-language-switcher{position:static !important;display:block;overflow:visible !important;
  padding:0 !important;background:none !important;border:0 !important;box-shadow:none !important;width:auto !important}
.bk-header-lang .trp-language-switcher-inner{display:flex;flex-direction:row !important;align-items:center}
.bk-header-lang .trp-current-language-item__wrapper{display:flex;align-items:center;gap:6px;padding:8px 10px 8px 12px;
  border:1px solid var(--line);border-radius:999px;color:var(--ink);font-size:14px;font-weight:600;cursor:pointer;
  transition:border-color .2s,color .2s,box-shadow .2s}
.bk-header-lang .trp-language-switcher:hover .trp-current-language-item__wrapper{border-color:var(--brand);color:var(--brand);
  box-shadow:0 4px 14px rgba(0,98,204,.12)}
.bk-header-lang .trp-language-item__current{display:flex;align-items:center;gap:7px;padding:0;border:0;color:inherit;font-size:14px;font-weight:600}
.bk-header-lang .trp-flag-image{width:20px !important;height:auto !important;aspect-ratio:4/3 !important;border-radius:3px !important;flex:none}
.bk-header-lang .trp-language-item-name{font-family:inherit;font-size:14px;font-weight:600;color:inherit}
.bk-header-lang .trp-shortcode-arrow{width:16px;height:16px;flex:none;transition:transform .2s var(--ease)}
.bk-header-lang .trp-shortcode-arrow path{stroke:currentColor}
.bk-header-lang .trp-language-switcher.is-open .trp-shortcode-arrow{transform:rotate(180deg)}
.bk-header-lang .trp-switcher-dropdown-list{position:absolute;top:100%;right:0;z-index:1000;
  flex-direction:column !important;min-width:184px;background:#fff;border-top:3px solid var(--brand);
  border-radius:0 0 12px 12px;box-shadow:0 8px 32px rgba(0,0,0,.12);padding:8px 0;margin:0}
.bk-header-lang .trp-switcher-dropdown-list .trp-language-item{padding:9px 16px;color:var(--ink)}
.bk-header-lang .trp-switcher-dropdown-list .trp-language-item:hover{background:var(--hover)}
.bk-header-lang .trp-switcher-dropdown-list .trp-language-item:hover .trp-language-item-name{color:var(--brand)}
.bk-header-lang .trp-language-switcher.is-open .trp-switcher-dropdown-list,
.bk-header-lang .trp-language-switcher[aria-expanded="true"] .trp-switcher-dropdown-list,
.bk-header-lang .trp-language-switcher:has(.trp-language-item__current[aria-expanded="true"]) .trp-switcher-dropdown-list{
  max-height:min(340px,70vh) !important;overflow-y:auto !important}
.bk-header-lang [hidden]{display:none !important}
.trp-floating-switcher{display:none !important}

/* ---- 移动端覆盖层 ---- */
.bk-mobile-overlay{position:absolute;top:100%;left:0;width:100%;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-card);max-height:0;overflow:hidden;visibility:hidden;opacity:0;
  transition:max-height .3s var(--ease),opacity .3s var(--ease),visibility .3s}
.bk-mobile-overlay.open{max-height:calc(100vh - var(--header-h) - 38px);overflow-y:auto;visibility:visible;opacity:1}
.bk-mobile-nav{list-style:none;margin:0;padding:0}
.bk-mobile-nav li{position:relative;border-bottom:1px solid #F0F0F0}
.bk-mobile-nav>li{background:#fff}
.bk-mobile-nav li>a{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:15px 24px;font-size:16px;font-weight:600;color:var(--ink)}
.bk-mobile-nav .m-m-w,.bk-mobile-nav .m-cap,.bk-mobile-nav .m-desc,.bk-mobile-nav .m-info{display:none}
.bk-mobile-nav li.menu-item-has-children>a{cursor:pointer}
.bk-mobile-nav .sub-menu{display:none;list-style:none;margin:0;padding:0 0 8px;background:#FAFAFA}
.bk-mobile-nav li.open>.sub-menu{display:block}
.bk-mobile-nav .sub-menu li>a{padding:11px 24px 11px 38px;font-size:15px;font-weight:500;color:var(--sec)}
.bk-mobile-nav .sub-menu .sub-menu li>a{padding-left:52px}
.bk-mobile-nav .acc-toggle{position:absolute;right:12px;top:8px;width:34px;height:34px;border:0;background:none;
  font-size:22px;line-height:1;color:var(--sec);cursor:pointer;transition:transform .25s var(--ease)}
.bk-mobile-nav li.open>.acc-toggle{transform:rotate(45deg)}
.bk-mobile-cta{padding:16px 24px}

/* ============ 首页 Hero ============ */
.bk-hero{background:linear-gradient(180deg,#FAFBFC 0%,#F5F7FA 100%);padding:64px 0 56px}
.bk-hero-in{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}
.bk-hero-eyebrow{display:inline-block;background:var(--hover);color:var(--brand);font-size:12px;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;padding:7px 14px;border-radius:999px;margin-bottom:18px}
.bk-hero h1{font-size:46px;font-weight:800;line-height:1.15;margin:0 0 18px}
.bk-hero-sub{font-size:17px;color:var(--sec);line-height:1.6;margin:0 0 28px}
.bk-hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.bk-btn-ghost{display:inline-flex;align-items:center;padding:11px 22px;border-radius:999px;
  border:2px solid var(--ink);color:var(--ink);font-size:14px;font-weight:700;transition:all .2s}
.bk-btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.bk-hero-points{display:flex;gap:24px;flex-wrap:wrap;margin:0;padding:0;list-style:none}
.bk-hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink)}
.bk-hero-points .tick{color:var(--brand);font-weight:800}
.bk-hero-img{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-card);
  padding:18px;display:flex;align-items:center;justify-content:center;min-height:340px}
.bk-hero-img img{max-height:420px;width:100%;object-fit:contain}
.bk-hero-img .bk-hero-ph{color:#B0B7C3;font-size:14px}

/* ============ 首页分区 ============ */
.bk-section{padding:64px 0}
.bk-section--gray{background:var(--gray)}
.bk-sec-head{text-align:center;max-width:720px;margin:0 auto 40px}
.bk-eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin-bottom:12px}
.bk-sec-head h2{font-size:34px;font-weight:800;margin:0 0 12px}
.bk-sec-head p{color:var(--sec);font-size:16px;margin:0}
.bk-home-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.bk-why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.bk-why-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 22px;transition:box-shadow .3s var(--ease),transform .3s var(--ease)}
.bk-why-card:hover{box-shadow:0 10px 28px rgba(0,0,0,.08);transform:translateY(-3px)}
.bk-why-ic{width:44px;height:44px;border-radius:12px;background:var(--hover);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.bk-why-card h3{font-size:17px;font-weight:800;margin:0 0 8px}
.bk-why-card p{font-size:13.5px;color:var(--sec);margin:0;line-height:1.55}
.bk-cta-band{background:var(--ink);border-radius:20px;padding:44px 48px;display:flex;justify-content:space-between;
  align-items:center;gap:24px;flex-wrap:wrap}
.bk-cta-band h2{color:#fff;font-size:28px;font-weight:800;margin:0}
.bk-cta-band p{color:rgba(255,255,255,.7);margin:6px 0 0;font-size:15px}
.bk-sect-cta{display:flex;justify-content:center;margin-top:36px}

/* ============ 内页通用（page / 非产品 single / 默认归档）============ */
.bk-page{padding:48px 0 72px}
.bk-page-crumbs{font-size:13px;color:var(--sec);margin-bottom:26px}
.bk-page-crumbs a{color:var(--sec)}
.bk-page-crumbs a:hover{color:var(--brand)}
.bk-page h1{font-size:34px;font-weight:800;margin:0 0 8px}
.bk-page-underline{width:64px;height:4px;background:var(--brand);border-radius:2px;margin:0 0 30px}
.bk-page-meta{font-size:13px;color:var(--sec);margin:-20px 0 26px}
.bk-sec-desc{color:var(--sec);font-size:15px;margin:-16px 0 28px;max-width:720px}
/* 默认正文页（page.php / single.php）整栏收到 1080 并居中：
   以前只有 .bk-entry 写 max-width:820px 且靠左，1920 屏上正文只占 43%、右边空 756px，
   看着像半屏。宽度放在容器上，标题/面包屑/下划线才跟着一起居中，不会和正文错位。 */
.bk-page--read>.bk-container{max-width:1128px}
.bk-entry{max-width:1080px;font-size:15.5px;line-height:1.8;color:#333}
.bk-entry h2{font-size:24px;margin-top:1.6em}
.bk-entry h3{font-size:19px;margin-top:1.4em}
.bk-entry img{border-radius:12px}
.bk-entry table{border-collapse:collapse;width:100%;margin:1em 0}
.bk-entry th,.bk-entry td{border:1px solid var(--line);padding:9px 13px;text-align:left;font-size:14px}
.bk-entry th{background:var(--gray)}
/* 正文里带两列排布（.bk-row-two-col）的页面走整宽：820px 阅读宽度会把每列压到 392px，
   图看着只占了小半个版面。这套规则原先挂在后台「额外 CSS」里，不在任何备份中，v1.3.55 搬进主题。 */
/* 双类名写：和上面的 .bk-entry 比谁生效不能靠书写顺序 */
.bk-entry.bk-entry--wide{max-width:none}
.bk-entry--wide .bk-row-two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;align-items:center;margin:40px 0}
/* wpautop 会把正文里的 HTML 注释包成空 <p>，它照样占一个格子，把图片挤到下一行去 */
.bk-entry--wide .bk-row-two-col>p:empty{display:none}
.bk-entry--wide .bk-col-desc h2{margin-top:0;font-size:28px}
.bk-entry--wide .bk-col-pic img{width:100%;max-width:620px;height:auto;display:block;margin:0 auto}
@media(max-width:900px){.bk-entry--wide .bk-row-two-col{grid-template-columns:minmax(0,1fr);gap:28px}}
.bk-archive-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:8px}
.bk-archive-item{border:1px solid var(--line);border-radius:16px;padding:22px 24px;background:#fff;
  transition:box-shadow .3s var(--ease),transform .3s var(--ease)}
.bk-archive-item:hover{box-shadow:0 10px 26px rgba(0,0,0,.08);transform:translateY(-2px)}
.bk-archive-item h3{font-size:18px;margin:0 0 8px}
.bk-archive-item h3 a{color:var(--ink)}
.bk-archive-item h3 a:hover{color:var(--brand)}
.bk-archive-item p{font-size:13.5px;color:var(--sec);margin:0 0 10px}
.bk-archive-meta{font-size:12px;color:#9AA1AC;text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.bk-archive-more{font-size:14px;font-weight:700;color:var(--brand)}
/* 带封面图的卡片（案例 / 新闻）：图片拉满卡片宽度，文字区自己留内边距 */
.bk-archive-media{padding:0;overflow:hidden;display:flex;flex-direction:column}
.bk-archive-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:#F2F4F7;flex:none}
.bk-archive-thumb img{width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .45s var(--ease)}
.bk-archive-media:hover .bk-archive-thumb img{transform:scale(1.045)}
.bk-archive-body{display:flex;flex-direction:column;flex:1}
.bk-archive-media .bk-archive-body{padding:20px 22px 22px}
.bk-archive-media .bk-archive-more{margin-top:auto;padding-top:4px}
/* 案例归档目前只有 1 条：两列网格会把它塞进左半格，右半整块空着，看着像半屏。
   单条时改成图左文右的横卡铺满整宽；等案例攒到 2 条以上，这条自动不再命中，无需回滚。 */
@media (min-width:641px){
  .bk-archive-list>li:only-child{grid-column:1/-1;flex-direction:row;align-items:flex-start}
  .bk-archive-list>li:only-child .bk-archive-thumb{flex:0 0 56%}
  .bk-archive-list>li:only-child .bk-archive-body{flex:1 1 auto;padding:8px 30px 24px}
}
.bk-pagination{margin-top:40px}
.bk-pagination .page-numbers{display:inline-block;min-width:38px;text-align:center;padding:9px 10px;margin:0 4px;
  border:1.5px solid var(--line);border-radius:10px;color:var(--ink);font-weight:600;font-size:14px}
.bk-pagination .page-numbers.current{background:var(--brand);border-color:var(--brand);color:#fff}
.bk-pagination .page-numbers:hover{border-color:var(--brand);color:var(--brand)}
.bk-pagination .page-numbers.current:hover{color:#fff}

/* ============ 页脚 ============ */
.bk-footer{background:var(--gray);border-top:1px solid var(--line);margin-top:0}
.bk-footer-grid{display:grid;grid-template-columns:1.85fr 1.2fr 1fr 1fr 1fr;gap:40px;padding:56px 24px 44px}
.bk-footer-logo{display:inline-block;margin-bottom:14px}
/* v1.3.40 页脚品牌栏：站点标识图（后台「自定义 → 站点标识」那张）和公司名称同一行，图在左 */
.bk-footer-id{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.bk-footer-id .bk-footer-logo{margin-bottom:0;font-size:17px}
.bk-footer-logoimg-wrap{display:inline-flex;align-items:center}
.bk-footer-logoimg-wrap img{display:block;height:30px;width:auto;object-fit:contain}
.bk-footer-social{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
/* 社媒图标基座：默认灰，hover 变 LOGO 的藏蓝（页脚浅灰底上直接换色就够，不用加底圈） */
.bk-soc{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;
  background:#fff;color:#9AA6B2;box-shadow:0 1px 3px rgba(0,0,0,.08);
  transition:color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease)}
.bk-soc:hover{color:var(--logo-blue);background:#fff;transform:translateY(-2px)}
.bk-soc svg{display:block}
.bk-footer-about{font-size:14px;color:var(--sec);line-height:1.7;max-width:300px;font-weight:400;}/*底部介绍文字加粗  1.6改成1 */
.bk-footer-line{font-size:13.5px;color:var(--sec);margin:0 0 6px;font-weight:400;}
.bk-footer-line a{color:var(--sec);}
.bk-footer-line a:hover{color:var(--brand);}
.bk-footer-col h4{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin:0 0 16px;color:var(--ink)}
.bk-footer-col ul{list-style:none}
.bk-footer-col li{margin-bottom:10px}
.bk-footer-col a{font-size:14px;color:var(--sec);font-weight:500;transition:color .2s}
.bk-footer-col a:hover{color:var(--brand)}
.bk-footer-more{color:var(--brand) !important;font-weight:700}
.bk-footer-bottom{background:#fff;border-top:1px solid var(--line);padding:18px 0;font-size:13px;color:var(--sec)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .bk-desktop-nav,.bk-header-actions .bk-btn-primary{display:none}
  .bk-menu-btn{display:flex}
  .top-nav{display:none}
  .bk-hero-in{grid-template-columns:1fr;gap:34px}
  .bk-hero h1{font-size:36px}
  .bk-home-grid{grid-template-columns:repeat(2,1fr)}
  .bk-why-grid{grid-template-columns:repeat(2,1fr)}
  .bk-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .bk-archive-list{grid-template-columns:1fr}
  .bk-home-grid{grid-template-columns:1fr}
  .bk-why-grid{grid-template-columns:1fr}
  .bk-hero{padding:44px 0 40px}
  .bk-hero h1{font-size:30px}
  .bk-cta-band{padding:32px 24px}
  .bk-cta-band h2{font-size:22px}
  .bk-footer-grid{grid-template-columns:1fr}
  .bk-topbar-links{gap:12px}
  /* 顶栏窄屏已经很挤，社媒图标只在页脚看得到就行 */
  .bk-topbar-social,.bk-topbar-sep{display:none}
  .bk-header-lang .trp-language-switcher-inner .trp-language-item-name,
  .bk-header-lang .trp-current-language-item__wrapper .trp-language-item-name{display:none}
  .bk-header-lang .trp-current-language-item__wrapper{padding:7px 9px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}