/*
 * ═══════════════════════════════════════════════════════════════
 * 好孩子助手 · 全站公共样式 base.css
 *   顶栏 / 抽屉 / 页脚 / 弹窗 / 回到顶部 + 设计变量,10 个页面共用一份。
 *   改这里 = 改全站。各页专属样式仍写在各自页面的 <style> 里,
 *   加载顺序在 base.css 之后,同名规则可覆盖。
 *
 *   本文件由 index.html 的原始 <style> 提取而来,请勿手工重排。
 * ═══════════════════════════════════════════════════════════════
 */

/* ---- 占位防闪烁:片段 fetch 回来前先占住顶栏高度,避免首屏跳动 ---- */
#site-header{min-height:56px}
@media(min-width:992px){#site-header{min-height:68px}}

:root{
  --brand-50:#EFF6FF;--brand-100:#DBEAFE;--brand-200:#BFDBFE;--brand-400:#60A5FA;
  --brand-600:#2563EB;--brand-800:#1E40AF;--brand-900:#172554;
  --accent-600:#EA580C;--accent-700:#C2410C;
  --n-0:#FFFFFF;--n-50:#F8FAFC;--n-200:#E2E8F0;--n-400:#94A3B8;--n-600:#475569;--n-900:#0F172A;
  --ink:#0F172A;--dark:#0B1220;
  --r:12px;--r-l:16px;--r-xl:24px;
  --font:"HarmonyOS Sans SC","MiSans",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --lift:0 8px 24px rgba(15,23,42,.08);
  --ease:cubic-bezier(.2,0,0,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
/* 锚点跳转时给吸顶顶栏留出空隙，否则标题会被压在顶栏下面 */
:target{scroll-margin-top:84px}
body{margin:0;background:var(--n-0);color:var(--ink);font-family:var(--font);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.dark-sec :focus-visible{outline-color:#fff}

.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 16px}
@media(min-width:768px){.wrap{padding:0 24px}}
@media(min-width:992px){.wrap{padding:0 32px}}
@media(min-width:1200px){.wrap{padding:0 40px}}
.sec{padding:56px 0}
@media(min-width:992px){.sec{padding:96px 0}}
.band{background:var(--n-50)}
.h2{font-size:24px;font-weight:700;line-height:1.25;letter-spacing:-.02em}
@media(min-width:992px){.h2{font-size:34px}}
.lead{font-size:16px;color:var(--n-600);margin-top:14px;max-width:38em;line-height:1.75}
@media(min-width:992px){.lead{font-size:18px}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:999px;border:1px solid transparent;
  font-size:16px;font-weight:500;cursor:pointer;background:transparent;
  transition:transform .2s var(--ease),background-color .2s,border-color .2s,color .2s}
.btn:hover{transform:scale(1.04)}
.btn:active{transform:scale(.96)}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-800)}
.btn-ghost{border-color:var(--n-200);background:#fff;color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-600)}
.btn-onDark{background:#fff;color:var(--dark)}
.btn-onDarkGhost{border-color:rgba(255,255,255,.35);color:#fff;backdrop-filter:blur(4px)}
.btn-onDarkGhost:hover{border-color:#fff}
.btn .ar{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8}
.btn .jd-ic{width:20px;height:20px;flex:none;display:block}

/* ---------- header ---------- */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:box-shadow .2s,border-color .2s;border-bottom:1px solid transparent}
.hd.is-scrolled{border-bottom-color:var(--n-200);box-shadow:0 1px 12px rgba(15,23,42,.05)}
.hd-in{display:flex;align-items:center;gap:12px;height:56px}
@media(min-width:992px){.hd-in{height:68px}}
.logo{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;letter-spacing:-.01em;flex:none}
.logo-mark{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;flex:none;overflow:hidden}
.logo-mark img{width:100%;height:100%;object-fit:cover;display:block}
.nav{display:none;margin-left:20px}
@media(min-width:992px){.nav{display:flex;align-items:center;gap:2px}}
.nav-i{position:relative}
.nav-a{display:inline-flex;align-items:center;gap:5px;padding:9px 14px;border-radius:9px;
  font-size:15px;font-weight:500;color:var(--n-900);cursor:pointer;background:none;border:0}
.nav-a:hover{background:var(--brand-50);color:var(--brand-600)}
.nav-a .cv{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .2s}
.nav-i:hover .cv,.nav-i:focus-within .cv{transform:rotate(180deg)}
.menu{position:absolute;top:calc(100% + 8px);left:0;width:308px;padding:8px;background:#fff;
  border:1px solid var(--n-200);border-radius:var(--r-l);box-shadow:0 20px 48px rgba(15,23,42,.10);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .2s,transform .2s,visibility .2s}
.nav-i:hover .menu,.nav-i:focus-within .menu{opacity:1;visibility:visible;transform:none}
.menu a{display:block;padding:11px 12px;border-radius:10px}
.menu a:hover{background:var(--brand-50)}
.menu b{display:block;font-size:15px;font-weight:500}
.menu span{display:block;font-size:13px;color:var(--n-600);line-height:1.6}
/* 顶栏「下载 App」：桌面全尺寸，移动端收窄但保持常驻 */
.hd-dl{margin-left:auto;display:inline-flex;flex:none;padding:0 14px;min-height:40px;font-size:14px}
@media(min-width:992px){.hd-dl{padding:0 20px;min-height:42px;font-size:15px}}
/* 极窄屏(≈320px)收成「下载」两字，避免把 logo 和汉堡菜单挤出屏幕 */
@media(max-width:380px){.hd-dl{padding:0 12px;font-size:13px}.hd-dl-s{display:none}}
.hd-cta{display:none}
@media(min-width:992px){.hd-cta{display:inline-flex;padding:0 20px;min-height:42px;font-size:15px}}
.burger{margin-left:auto;flex:none;width:44px;height:44px;display:grid;place-items:center;background:none;border:0;border-radius:10px;cursor:pointer}
@media(min-width:992px){.burger{display:none}}
.burger svg{width:22px;height:22px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round}

.drawer{position:fixed;inset:0;z-index:70;background:#fff;transform:translateX(100%);visibility:hidden;
  transition:transform .28s var(--ease),visibility .28s;display:flex;flex-direction:column;
  padding:12px 16px 24px;overflow-y:auto}
body.nav-open .drawer{transform:none;visibility:visible}
body.nav-open{overflow:hidden}
.dr-top{display:flex;align-items:center;justify-content:space-between;height:52px}
.dr-x{width:44px;height:44px;display:grid;place-items:center;background:none;border:0;cursor:pointer}
.dr-x svg{width:22px;height:22px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer details{border-bottom:1px solid var(--n-200)}
.drawer summary{list-style:none;cursor:pointer;padding:17px 0;display:flex;align-items:center;
  justify-content:space-between;font-size:17px;font-weight:500}
.drawer summary::-webkit-details-marker{display:none}
.drawer summary svg{width:14px;height:14px;stroke:var(--n-400);fill:none;stroke-width:2;transition:transform .2s}
.drawer details[open] summary svg{transform:rotate(180deg)}
.dr-sub{padding:0 0 14px}
.dr-sub a{display:block;padding:10px 12px;border-radius:10px;background:var(--brand-50);margin-bottom:8px}
.dr-sub b{display:block;font-size:15px;font-weight:500}
.dr-sub span{display:block;font-size:13px;color:var(--n-600)}
.dr-link{display:block;padding:17px 0;font-size:17px;font-weight:500;border-bottom:1px solid var(--n-200)}
.dr-cta{margin-top:22px;display:grid;gap:10px}

/* ---------- 01 全幅 Hero ---------- */
.hero{position:relative;display:flex;align-items:center;color:#fff;overflow:hidden;min-height:540px}
@media(min-width:992px){.hero{min-height:660px}}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:62% 50%}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.58),rgba(11,18,32,.66))}
@media(min-width:992px){.hero-bg::after{
  background:linear-gradient(100deg,rgba(11,18,32,.74) 0%,rgba(11,18,32,.46) 44%,rgba(11,18,32,.04) 72%)}}
.hero .wrap{position:relative;z-index:1;padding-top:64px;padding-bottom:64px}
.hero h1{font-size:clamp(32px,8.4vw,68px);font-weight:700;line-height:1.22;
  letter-spacing:.02em;max-width:13em}
.hero h1 em{font-style:normal;color:#8AB6FF}
.hero-p{font-size:16px;color:rgba(255,255,255,.88);margin-top:22px;max-width:34em;line-height:1.8}
@media(min-width:992px){.hero-p{font-size:18px}}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}

/* ---------- 五组能力 ---------- */
.grid-c{display:grid;gap:14px;grid-template-columns:1fr;margin-top:34px}
@media(min-width:600px){.grid-c{gap:16px}}
@media(min-width:768px){.grid-c{grid-template-columns:repeat(2,1fr)}}
.card{background:#fff;border:1px solid var(--n-200);border-radius:var(--r-l);padding:22px 18px;
  display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s,border-color .24s}
.card:hover{transform:translateY(-4px);box-shadow:var(--lift);border-color:var(--brand-200)}
.ic{width:44px;height:44px;border-radius:var(--r);background:var(--brand-50);display:grid;place-items:center;margin-bottom:14px}
.ic svg{width:22px;height:22px;stroke:var(--brand-600);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:18px;font-weight:600;line-height:1.4;letter-spacing:-.01em}
.card-hd{display:flex;align-items:center;gap:12px}
.card-hd .ic{margin-bottom:0;flex:none}
.card p{font-size:14px;color:var(--n-600);margin-top:8px;line-height:1.7;max-width:34em}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.chips span{font-size:11px;color:var(--brand-800);background:var(--brand-50);border-radius:6px;padding:3px 8px;line-height:1.6}
.card .chips{margin-top:auto;padding-top:16px}
.card .chips span{font-size:12px;padding:4px 9px}

/* ---------- 大图板块 showcase ---------- */
.show{display:grid;grid-template-columns:100%;align-items:stretch}
@media(min-width:992px){.show{grid-template-columns:1fr 1fr;min-height:560px}}
.show-media{position:relative;min-height:280px}
@media(min-width:768px){.show-media{min-height:360px}}
@media(min-width:992px){.show-media{min-height:0}}
.show-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.show-body{display:flex;align-items:center;padding:48px 0}
@media(min-width:992px){.show-body{padding:72px 0}}
.show-body .in{max-width:520px}
.show-body h2{font-size:24px;font-weight:700;line-height:1.3;letter-spacing:-.02em}
@media(min-width:992px){.show-body h2{font-size:32px}}
.show-body p{font-size:16px;color:var(--n-600);margin-top:16px;line-height:1.8}
@media(min-width:992px){.show-body p{font-size:17px}}
@media(min-width:992px){.show.rev .show-media{order:2}}
.show-body .in{margin-left:0}
.show-body .wrap-in{display:flex;justify-content:flex-start}
@media(min-width:992px){.show.rev .wrap-in{justify-content:flex-end;text-align:left}}
.show-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.show-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.7;color:var(--n-600)}
.show-list li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--brand-600);margin-top:9px}
.show-list b{color:var(--ink);font-weight:600;flex:none}
.show-tag{display:inline-flex;align-items:center;gap:7px;margin:0 0 14px;padding:5px 13px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.06em;line-height:1.4;color:var(--brand-600);background:rgba(37,99,235,.10);border:1px solid rgba(37,99,235,.22)}
.show-tag::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:currentColor}
.show-body .show-tag{color:#93C5FD;background:rgba(96,165,250,.14);border-color:rgba(96,165,250,.30)}


/* ---------- 合规背书 ---------- */
.proof{display:grid;grid-template-columns:100%;gap:16px;margin-top:38px}
@media(min-width:768px){.proof{grid-template-columns:repeat(2,1fr);gap:22px}}
.pcard{background:var(--n-50);border-radius:var(--r-l);padding:28px 24px 26px}
.pcard .num{font-size:clamp(56px,15.5vw,112px);font-weight:700;line-height:1.05;
  letter-spacing:-.045em;font-variant-numeric:tabular-nums;color:var(--brand-600);margin-top:0}
@media(min-width:768px){.pcard .num{font-size:clamp(78px,10vw,140px)}}
.pcard h3{font-size:17px;font-weight:600;margin-top:18px;letter-spacing:-.01em}
.pcard p{font-size:14px;color:var(--n-600);margin-top:9px;line-height:1.7;max-width:36em}
.src{font-size:12px;color:#475569;margin-top:24px;line-height:1.7}
/* 法条正文铺满内容区整宽后再换行，消除右侧空白 */
#proof .lead{max-width:none}

/* ---------- 05 手机产品线（深色全幅） ---------- */
.pl{position:relative;color:#fff;overflow:hidden;background:var(--dark);min-height:540px;
  display:flex;align-items:center}
@media(min-width:992px){.pl{min-height:620px}}
.pl-bg{position:absolute;inset:0}
.pl-bg img{width:100%;height:100%;object-fit:cover;object-position:72% 50%}
.pl-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.72),rgba(11,18,32,.82))}
@media(min-width:992px){.pl-bg::after{
  background:linear-gradient(100deg,rgba(11,18,32,.94) 0%,rgba(11,18,32,.6) 46%,rgba(11,18,32,.16) 100%)}}
.pl .wrap{position:relative;z-index:1;padding-top:72px;padding-bottom:72px}
.pl h2{font-size:26px;font-weight:700;line-height:1.3;letter-spacing:-.02em;max-width:16em}
.pl h2 br{display:none}
@media(max-width:400px){.pl h2 br{display:inline}}
@media(min-width:992px){.pl h2{font-size:38px}}
.pl p{font-size:16px;color:rgba(255,255,255,.8);margin-top:16px;max-width:32em;line-height:1.8}
@media(min-width:992px){.pl p{font-size:17px}}
.pl .btn{margin-top:28px}
.pl .btn + .btn{margin-left:12px}

/* ---------- 06 下载（深色带背景图） ---------- */
.dl{position:relative;color:#fff;background:var(--dark)}
.dl-bg{position:absolute;inset:0}
.dl-bg img{width:100%;height:100%;object-fit:cover;object-position:78% 50%;opacity:.9}
.dl-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.9),rgba(11,18,32,.74))}
@media(min-width:992px){.dl-bg::after{
  background:linear-gradient(100deg,rgba(11,18,32,.96) 0%,rgba(11,18,32,.78) 50%,rgba(11,18,32,.3) 100%)}}
.dl .wrap{position:relative;z-index:1;padding-top:64px;padding-bottom:64px}
@media(min-width:992px){.dl .wrap{padding-top:96px;padding-bottom:96px}}
.dl h2{font-size:26px;font-weight:700;line-height:1.25;letter-spacing:-.02em}
@media(min-width:992px){.dl h2{font-size:38px}}
.dl .mut{color:rgba(255,255,255,.72);font-size:16px;margin-top:14px;max-width:32em;line-height:1.75}
.dl-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.dl-tip{font-size:13px;color:rgba(255,255,255,.55);margin-top:18px;line-height:1.8}
/* 家长端按钮：悬停/聚焦弹出下载二维码 */
.qr-wrap{position:relative;display:inline-flex}
.qr-pop{position:absolute;bottom:calc(100% + 14px);left:0;z-index:6;background:#fff;color:var(--ink);
  padding:12px 12px 10px;border-radius:14px;box-shadow:0 14px 36px rgba(0,0,0,.4);
  opacity:0;visibility:hidden;transform:translateY(8px);text-align:center;
  transition:opacity .2s var(--ease),transform .2s var(--ease)}
.qr-pop img{display:block;width:150px;height:150px;border-radius:8px}
.qr-pop b{display:block;margin-top:8px;font-size:13px;font-weight:600;color:var(--ink)}
.qr-pop::after{content:"";position:absolute;top:100%;left:28px;border:8px solid transparent;border-top-color:#fff}
.qr-wrap:hover .qr-pop,.qr-wrap:focus-within .qr-pop{opacity:1;visibility:visible;transform:none}
@media(max-width:575px){.qr-pop img{width:124px;height:124px}}

/* ---------- footer ---------- */
.ft{background:var(--dark);color:#94A3B8;padding:0 0 32px;border-top:1px solid rgba(255,255,255,.10)}
.ft-in{display:grid;grid-template-columns:100%;gap:32px;padding-top:44px}
@media(min-width:768px){.ft-in{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}}
.ft-brand .logo{color:#fff}
.ft-brand p{font-size:13px;margin-top:14px;line-height:1.75;max-width:26em}
.ft h3{color:#fff;font-size:14px;font-weight:500;margin-bottom:14px}
.ft li{margin-bottom:10px}
.ft li a{font-size:13px;color:#94A3B8}
.ft li a:hover{color:#fff}
.ft-bot{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px 20px;font-size:12px;line-height:1.8}
.ft-bot a:hover{color:#fff}
.ft-bot{justify-content:center;text-align:center}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .45s ease,transform .45s var(--ease)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .btn:hover,.card:hover{transform:none}
  html{scroll-behavior:auto}
  .drawer{transition:none}
}

/* ═══════════════════════════════════════════════════════════════
   重色版 v2 · 灰调柔光覆盖（只存在于本文件，浅色原稿不受影响）

   v1 → v2 的两处调整：
   ① 品牌蓝重块 #1D4ED8 → #2F4E86（降亮 ~25%、降饱和一半），不再刺眼
   ② 深黑底 #080E1A → #1B2028（掺灰的暗调），文字由纯白 → 柔白 #F0F3F8
   对比度全部复核过，正文 ≥ 4.5:1、大字 ≥ 3:1（WCAG 2.2 AA）
   ═══════════════════════════════════════════════════════════════ */
:root{
  --blue-block:#2F4E86;          /* 品牌蓝重块 · 降亮降饱和 */
  --night:#1B2028;               /* 骨架 · 掺灰暗调（非纯黑） */
  --night-2:#252B35;             /* 抬升面 · 抽屉/浮层 */
  --night-3:#2C3340;             /* 卡面/玻璃层 */
  --on-night:#F0F3F8;            /* 深底标题 · 柔白（不用纯白刺眼） */
  --on-night-2:#C3CBD8;          /* 深底正文 */
  --on-night-3:#98A2B3;          /* 深底提示小字 */
  --blue-tint:#9BBBE8;           /* 深底上的蓝 · 统一降亮 */
  --page-tint:#ECF0F6;           /* 浅蓝呼吸段 → 偏灰 */
  --lift:0 16px 38px rgba(27,32,40,.16);
}
body{background:var(--night)}

/* ── 顶栏 ── */
.hd{background:rgba(27,32,40,.92)}
.hd.is-scrolled{background:rgba(27,32,40,.97);border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 2px 22px rgba(0,0,0,.34)}
.hd .logo{color:var(--on-night)}
.hd .nav-a{color:var(--on-night-2)}
.hd .nav-a:hover{background:rgba(255,255,255,.10);color:var(--on-night)}
.hd .menu{background:var(--night-2);border-color:rgba(255,255,255,.12);box-shadow:0 26px 60px rgba(0,0,0,.5)}
.hd .menu a:hover{background:rgba(255,255,255,.07)}
.hd .menu b{color:var(--on-night)}
.hd .menu span{color:var(--on-night-3)}
.hd .burger svg{stroke:var(--on-night)}

/* ── 移动端抽屉 ── */
.drawer{background:var(--night-2);color:var(--on-night)}
.drawer details,.dr-link{border-bottom-color:rgba(255,255,255,.10)}
.dr-x svg{stroke:var(--on-night)}
.dr-sub a{background:rgba(255,255,255,.07)}
.dr-sub b{color:var(--on-night)}
.dr-sub span{color:var(--on-night-3)}

/* ── 01 Hero · 去掉蓝黑冷调，改用灰调 + 品牌蓝温度 ── */
.hero-bg::after{background:linear-gradient(155deg,rgba(27,32,40,.93) 0%,rgba(47,78,134,.74) 46%,rgba(27,32,40,.58) 100%)}
@media(min-width:992px){
  .hero-bg::after{background:linear-gradient(100deg,rgba(27,32,40,.95) 0%,rgba(47,78,134,.68) 44%,rgba(27,32,40,.22) 76%)}
}
.hero h1 em{color:var(--blue-tint)}
.hero-p{color:rgba(240,243,248,.86)}

/* ── 02 全面守护 · 品牌蓝重块 + 白卡 ── */
.band{background:var(--blue-block);
  background-image:radial-gradient(120% 110% at 88% -10%,rgba(255,255,255,.13),rgba(255,255,255,0) 60%)}
.band .h2{color:var(--on-night)}
.band .lead{color:rgba(240,243,248,.86)}
.card{background:#fff;border-color:transparent;box-shadow:0 12px 28px rgba(27,32,40,.20)}
.card:hover{box-shadow:0 20px 44px rgba(27,32,40,.28);border-color:transparent}
.ic{background:var(--blue-block)}
.ic svg{stroke:#fff}
.card h3{color:#1B2028}
.card p{color:#4A5567}
.card .chips span{background:#E7EDF7;color:#2F4E86}

/* ── 03 / 05 大图板块 · 文字侧灰调暗面 ── */
.show{background:var(--night)}
.show-body{background:var(--night)}
.show-body h2{color:var(--on-night)}
.show-body p{color:var(--on-night-2)}
.show-body .show-list li{color:var(--on-night-2)}
.show-body .show-list li::before{background:var(--brand-400)}
.show-body .show-list b{color:var(--on-night)}

/* ── 04 大图板块 · 文字侧品牌蓝重块 ── */
.show.blue{background:var(--blue-block)}
.show.blue .show-body{background:var(--blue-block)}

/* ── 06 合规背书 · 浅灰蓝呼吸段 ── */
#proof{background:var(--page-tint)}
.pcard{background:#fff;box-shadow:0 12px 26px rgba(27,32,40,.09)}
.pcard .num{color:var(--blue-block)}

/* ── 07 / 08 深色大图 · 遮罩改灰调 ── */
.pl-bg::after{background:linear-gradient(160deg,rgba(27,32,40,.90),rgba(47,78,134,.78))}
@media(min-width:992px){
  .pl-bg::after{background:linear-gradient(100deg,rgba(27,32,40,.95) 0%,rgba(47,78,134,.66) 46%,rgba(27,32,40,.26) 100%)}
}
.dl-bg::after{background:linear-gradient(160deg,rgba(27,32,40,.91),rgba(47,78,134,.74))}
@media(min-width:992px){
  .dl-bg::after{background:linear-gradient(100deg,rgba(27,32,40,.96) 0%,rgba(47,78,134,.76) 50%,rgba(27,32,40,.36) 100%)}
}
.ft{background:var(--night)}
.ft li a{color:#9AA6B8}
.ft-brand p{color:#9AA6B8}
.ft-bot{color:#9AA6B8}

/* ── 深底上的焦点环换亮色 ── */
.hd :focus-visible,.show-body :focus-visible,.pl :focus-visible,.dl :focus-visible,
.ft :focus-visible,.drawer :focus-visible{outline-color:#E4E9F2}


/* ── 产品分类 · 全宽下拉商品面板 ── */
.nav-cat{position:static}
.mega{position:absolute;top:100%;left:0;right:0;z-index:60;background:#fff;color:var(--ink);
  border-top:1px solid #EDEFF3;box-shadow:0 24px 44px rgba(15,23,42,.12);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s}
.nav-i:hover .mega,.nav-i:focus-within .mega{opacity:1;visibility:visible;transform:none}
.mega .wrap{padding-top:2px;padding-bottom:26px}
.mega-tabs{display:flex;gap:34px;border-bottom:1px solid #F0F2F5}
.mega-tabs button{background:none;border:0;cursor:pointer;font-family:inherit;
  font-size:15px;font-weight:500;color:var(--n-600);padding:16px 2px 12px;position:relative}
.mega-tabs button.on{color:var(--ink);font-weight:600}
.mega-tabs button.on::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--brand-600)}
.mega-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px 24px;
  padding-top:24px}
.mega-item{display:grid;justify-items:center;gap:12px;padding:12px 6px 14px;border-radius:8px;
  transition:background .18s}
.mega-item:hover{background:#F6F8FB}
.mega-pic{width:150px;max-width:100%;aspect-ratio:1/1;overflow:hidden;display:grid;place-items:center}
.mega-pic img{width:100%;height:100%;object-fit:cover}
.mega-name{font-size:14px;color:var(--ink);text-align:center;line-height:1.55;transition:color .18s}
.mega-item:hover .mega-name{color:var(--brand-600)}
.mega a:focus-visible{outline-color:var(--brand-600)}
.mega-more{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  margin-top:20px;padding-top:16px;border-top:1px solid #F0F2F5}
.mega-more-t{font-size:13px;color:var(--n-600)}
.mega-shop{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;
  border:1px solid #D8DEE8;border-radius:999px;background:#fff;
  font-size:13px;font-weight:500;color:var(--ink);text-decoration:none;
  transition:color .18s,border-color .18s,background .18s}
.mega-shop:hover{color:var(--brand-600);border-color:var(--brand-600);background:#F4F8FD}
.mega-shop svg{width:13px;height:13px;flex:none;stroke:currentColor;fill:none;
  stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:991px){.mega{display:none}}
.nav-a.is-on{color:var(--on-night);background:rgba(255,255,255,.08)}

/* ══════════════════════════════════════════
   导航当前页高亮(原只写在 about / tutorial 两页,已上提为全站公共)
   ══════════════════════════════════════════ */
/* ══════════════════════════════════════════
   联系我们 · 微信二维码弹窗(全站共用)
   ══════════════════════════════════════════ */
/* ══════════════════════════════════════════
   联系我们 · 微信二维码弹窗（各页共用）
   ══════════════════════════════════════════ */
.ct-modal{position:fixed;inset:0;z-index:120;display:grid;place-items:center;padding:20px;
  background:rgba(11,16,24,.66);
  -webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);
  opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s}
.ct-modal.on{opacity:1;visibility:visible}
.ct-box{position:relative;width:100%;max-width:340px;background:#fff;border-radius:16px;
  padding:28px 24px 24px;text-align:center;
  box-shadow:0 28px 64px rgba(0,0,0,.42);
  transform:translateY(12px) scale(.985);
  transition:transform .26s cubic-bezier(.2,0,0,1)}
.ct-modal.on .ct-box{transform:none}
.ct-x{position:absolute;top:8px;right:8px;width:40px;height:40px;display:grid;place-items:center;
  background:none;border:0;border-radius:10px;cursor:pointer}
.ct-x svg{width:20px;height:20px;stroke:#5A6577;fill:none;stroke-width:1.8;stroke-linecap:round}
.ct-x:hover{background:#F1F4F9}
.ct-x:focus-visible{outline:2px solid #2F4E86;outline-offset:2px}
.ct-t{font-size:20px;font-weight:700;line-height:1.4;color:#1B2028;letter-spacing:-.01em}
.ct-s{font-size:13px;color:#6B7688;margin-top:8px;line-height:1.7}
.ct-qr{margin-top:18px;padding:10px;border:1px solid #E6EAF1;border-radius:12px;background:#fff}
.ct-qr img{display:block;width:100%;max-width:220px;height:auto;margin:0 auto}
.ct-id{margin-top:14px;font-size:15px;font-weight:600;color:#2F4E86}
body.ct-lock{overflow:hidden}
@media(prefers-reduced-motion:reduce){.ct-modal,.ct-box{transition:none}}
/* ---------- 回到顶部 ---------- */
.totop{position:fixed;right:24px;bottom:24px;z-index:90;display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;padding:0;border:0;border-radius:50%;background:var(--brand-600,#2563EB);color:#fff;cursor:pointer;box-shadow:0 10px 24px rgba(15,23,42,.18);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s ease,transform .25s ease,visibility .25s,background .2s ease,box-shadow .2s ease;-webkit-tap-highlight-color:transparent}
.totop.on{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--brand-800,#1E40AF);box-shadow:0 14px 28px rgba(15,23,42,.24)}
.totop:active{transform:translateY(1px)}
.totop:focus-visible{outline:3px solid rgba(37,99,235,.45);outline-offset:3px}
.totop svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:640px){.totop{right:16px;bottom:16px;width:44px;height:44px}.totop svg{width:20px;height:20px}}
@media (prefers-reduced-motion:reduce){.totop{transition:none}}
@media print{.totop{display:none!important}}