/* ============================================================
   强哥AI智慧校园生态栈 · 共享样式
   主题：浅色极光 · 渐变流动 · 玻璃拟态
   ============================================================ */

:root{
  /* 基础色 */
  --bg:#eef2fb;
  --bg-2:#f6f8ff;
  --ink:#0e1b2a;
  --ink-soft:#46566b;
  --muted:#8794a8;

  /* 玻璃 */
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --glass-line:rgba(255,255,255,.75);
  --line:rgba(14,27,42,.09);

  /* 品牌色 */
  --brand:#16a34a;          /* 主品牌绿（沿用软件） */
  --brand-deep:#0c7a37;
  --brand-soft:#e6f6ec;
  --violet:#6d5efc;         /* AI 紫 */
  --violet-deep:#5847e6;
  --cyan:#08b6d4;
  --pink:#ec5aa0;
  --gold:#f6a821;

  /* 渐变 */
  --grad-brand:linear-gradient(120deg,#16a34a 0%,#0ea66e 45%,#08b6d4 100%);
  --grad-ai:linear-gradient(120deg,#6d5efc 0%,#8b5cf6 50%,#ec5aa0 100%);
  --grad-mix:linear-gradient(120deg,#16a34a 0%,#22b3a0 35%,#6d5efc 75%,#8b5cf6 100%);

  /* 阴影 */
  --sh-sm:0 4px 14px -6px rgba(14,27,42,.18);
  --sh-md:0 14px 38px -16px rgba(14,27,42,.26);
  --sh-lg:0 30px 70px -28px rgba(34,46,92,.4);
  --sh-glow:0 12px 34px -10px rgba(109,94,252,.45);

  --radius:20px;
  --radius-sm:14px;
  --maxw:1180px;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Hiragino Sans GB",sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono","DM Mono",Menlo,Consolas,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:rgba(109,94,252,.22)}

/* ---------- 动态极光背景 ---------- */
.aurora{position:fixed;inset:0;z-index:-3;overflow:hidden;pointer-events:none;
  background:
    radial-gradient(120% 90% at 80% -10%,#ffffff 0%,transparent 55%),
    linear-gradient(180deg,#eef2fb 0%,#f3f1fb 45%,#eaf5f1 100%);}
.aurora .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.7;will-change:transform}
.blob.b1{width:46vw;height:46vw;left:-8vw;top:-10vw;
  background:radial-gradient(circle at 30% 30%,rgba(22,163,74,.55),transparent 65%);
  animation:drift1 26s ease-in-out infinite}
.blob.b2{width:42vw;height:42vw;right:-6vw;top:-6vw;
  background:radial-gradient(circle at 60% 40%,rgba(109,94,252,.5),transparent 65%);
  animation:drift2 30s ease-in-out infinite}
.blob.b3{width:40vw;height:40vw;left:18vw;bottom:-16vw;
  background:radial-gradient(circle at 50% 50%,rgba(8,182,212,.45),transparent 65%);
  animation:drift3 34s ease-in-out infinite}
.blob.b4{width:34vw;height:34vw;right:6vw;bottom:-10vw;
  background:radial-gradient(circle at 50% 50%,rgba(236,90,160,.38),transparent 65%);
  animation:drift1 38s ease-in-out infinite reverse}
.blob.b5{width:30vw;height:30vw;left:42vw;top:24vh;
  background:radial-gradient(circle at 50% 50%,rgba(34,179,160,.4),transparent 65%);
  animation:drift2 28s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(7vw,5vh) scale(1.12)}66%{transform:translate(-5vw,8vh) scale(.95)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-8vw,6vh) scale(1.15)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}40%{transform:translate(6vw,-6vh) scale(1.1)}80%{transform:translate(-4vw,4vh) scale(.92)}}
/* 细网格 + 颗粒叠层 */
.aurora::after{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(14,27,42,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(14,27,42,.035) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(120% 80% at 50% 0%,#000 30%,transparent 78%)}
/* 漂浮微粒 */
.particles{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden}
.particles i{position:absolute;display:block;width:5px;height:5px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,94,252,.9),rgba(109,94,252,0) 70%);
  animation:floatUp linear infinite}
@keyframes floatUp{0%{transform:translateY(0) translateX(0);opacity:0}10%{opacity:.9}90%{opacity:.7}100%{transform:translateY(-112vh) translateX(22px);opacity:0}}

@media (prefers-reduced-motion:reduce){
  .blob,.particles i{animation:none!important}
  html{scroll-behavior:auto}
}

/* ---------- 容器 / 区块 ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{position:relative}
.section{padding:54px 0}
.section-tight{padding:30px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 34px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.6px;
  color:var(--violet-deep);background:rgba(109,94,252,.1);border:1px solid rgba(109,94,252,.2);
  padding:6px 14px;border-radius:999px;margin-bottom:18px}
.eyebrow.green{color:var(--brand-deep);background:var(--brand-soft);border-color:rgba(22,163,74,.22)}
.sec-head h2{font-size:clamp(26px,4vw,40px);line-height:1.18;letter-spacing:-.5px;font-weight:800}
.sec-head p{margin-top:14px;color:var(--ink-soft);font-size:16.5px}
.grad-text{background:var(--grad-mix);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad-text-green{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 玻璃卡片 ---------- */
.glass{background:var(--glass);backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);
  border:1px solid var(--glass-line);border-radius:var(--radius);
  box-shadow:var(--sh-md),inset 0 1px 0 rgba(255,255,255,.7)}

/* ---------- 按钮 ---------- */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;letter-spacing:.2px;
  transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s,background .25s,color .25s;
  overflow:hidden;white-space:nowrap;user-select:none}
.btn:focus-visible{outline:3px solid rgba(109,94,252,.4);outline-offset:2px}
.btn svg{width:18px;height:18px}
/* 光泽扫过 */
.btn::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-18deg);transition:left .6s}
.btn:hover::after{left:140%}

.btn-primary{background:var(--grad-mix);color:#fff;box-shadow:var(--sh-glow)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 42px -12px rgba(109,94,252,.6)}
.btn-primary:active{transform:translateY(-1px) scale(.99)}

.btn-green{background:var(--grad-brand);color:#fff;box-shadow:0 12px 30px -10px rgba(22,163,74,.5)}
.btn-green:hover{transform:translateY(-3px);box-shadow:0 18px 40px -12px rgba(22,163,74,.62)}
.btn-green:active{transform:translateY(-1px) scale(.99)}

.btn-orange{background:linear-gradient(120deg,#fb923c 0%,#f97316 50%,#ef4444 100%);color:#fff;box-shadow:0 12px 30px -10px rgba(249,115,22,.55)}
.btn-orange:hover{transform:translateY(-3px);box-shadow:0 18px 42px -12px rgba(249,115,22,.66)}
.btn-orange:active{transform:translateY(-1px) scale(.99)}

.btn-ghost{background:var(--glass-strong);color:var(--ink);border:1px solid var(--line);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:var(--sh-sm)}
.btn-ghost:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:rgba(109,94,252,.4)}
.btn-ghost:active{transform:translateY(-1px)}

.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:16px 32px;font-size:16.5px}
.btn[disabled],.btn.is-disabled{opacity:.55;cursor:not-allowed;pointer-events:none;filter:grayscale(.2)}

/* ---------- 顶部导航 ---------- */
header.site{position:sticky;top:0;z-index:100;transition:background .3s,box-shadow .3s}
header.site.scrolled{background:rgba(246,248,255,.78);backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);box-shadow:0 1px 0 var(--line),0 10px 30px -22px rgba(14,27,42,.4)}
.nav{max-width:1320px;margin:0 auto;padding:12px 22px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:13px;font-weight:800;font-size:24px;letter-spacing:.2px;line-height:1.12;flex:none}
.brand .mark{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;color:#fff;font-size:27px;flex:none;
  background:var(--grad-mix);box-shadow:0 10px 24px -6px rgba(109,94,252,.6);transform:rotate(-6deg)}
.brand .mark span{transform:rotate(6deg)}
.brand b{font-weight:800}
.brand .sub{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:1.2px;display:block;margin-top:0}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:8px 11px;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--ink-soft);transition:.22s;white-space:nowrap}
.nav-links a:hover{color:var(--ink);background:rgba(109,94,252,.1)}
.nav-links a.active{color:#fff;background:linear-gradient(120deg,#fb923c,#f97316);box-shadow:0 6px 16px -8px rgba(249,115,22,.6)}
.nav-cta{display:flex;align-items:center;gap:10px}
/* 导航搜索框 */
.nav-search{display:flex;align-items:center;gap:4px;background:var(--glass-strong);border:1px solid var(--line);
  border-radius:999px;padding:4px 4px 4px 13px;box-shadow:var(--sh-sm);transition:.2s}
.nav-search:focus-within{border-color:rgba(109,94,252,.5);box-shadow:0 0 0 3px rgba(109,94,252,.15)}
.nav-search input{border:none;background:none;outline:none;font-size:14px;width:122px;color:var(--ink);font-family:inherit}
.nav-search input::placeholder{color:var(--muted)}
.nav-search button{flex:none;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;color:#fff;background:var(--grad-mix);transition:.2s}
.nav-search button:hover{transform:scale(1.08)}
.nav-search button svg{width:16px;height:16px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;background:var(--glass-strong);border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle i{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ---------- 通用徽章/标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;padding:4px 11px;border-radius:999px;letter-spacing:.3px}
.badge.live{color:#fff;background:var(--grad-brand);box-shadow:0 6px 16px -6px rgba(22,163,74,.55)}
.badge.soon{color:var(--ink-soft);background:rgba(135,148,168,.16);border:1px solid var(--line)}
.badge.hot{color:#fff;background:linear-gradient(120deg,#f6a821,#ec5aa0)}
.dot{width:7px;height:7px;border-radius:50%;background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.35);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.tag{display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;color:var(--ink-soft);
  background:rgba(255,255,255,.55);border:1px solid var(--line);padding:4px 10px;border-radius:8px}

/* ---------- 滚动揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}

/* ---------- 页脚 ---------- */
footer.site{margin-top:40px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.3),rgba(255,255,255,.62))}
.foot{max-width:var(--maxw);margin:0 auto;padding:56px 24px 28px;display:grid;grid-template-columns:1.4fr 1fr 1.3fr;gap:40px}
.foot .brand{margin-bottom:14px}
.foot p{color:var(--ink-soft);font-size:14.5px;max-width:320px}
.foot h4{font-size:14px;font-weight:800;margin-bottom:11px;letter-spacing:.4px}
.foot ul li{margin-bottom:4px;line-height:1.3}
.foot ul a{color:var(--ink-soft);font-size:14.5px;transition:.2s;display:inline-block;padding:1px 0}
.foot ul a:hover{color:var(--brand-deep)}
.foot .contact li{display:flex;align-items:center;gap:9px;color:var(--ink-soft);font-size:14.5px;margin-bottom:6px;line-height:1.35}
.foot .contact svg{width:17px;height:17px;color:var(--violet-deep);flex:none}
.foot-bottom{border-top:1px solid var(--line);text-align:center;padding:20px;color:var(--muted);font-size:13px}
.trust{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-deep);
  background:var(--brand-soft);border:1px solid rgba(22,163,74,.2);padding:6px 14px;border-radius:999px;margin-top:16px}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links,.nav-search,.nav-cta .btn{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:880px){
  .section{padding:60px 0}
  .nav.open + .mobile-menu,.mobile-menu.open{display:block}
  .foot{grid-template-columns:1fr;gap:30px}
}
.mobile-menu{display:none;position:sticky;top:70px;z-index:99;margin:0 16px;padding:12px;border-radius:18px}
.mobile-menu a{display:block;padding:12px 14px;border-radius:12px;font-weight:600;color:var(--ink-soft)}
.mobile-menu a:hover{background:rgba(109,94,252,.1);color:var(--ink)}

/* ============================================================
   版块样式（首页 + 产品页通用）
   ============================================================ */

/* ---------- Hero ---------- */
.hero{padding:42px 0 54px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.hero-copy h1{font-size:clamp(33px,5.2vw,57px);line-height:1.08;letter-spacing:-1px;font-weight:800;margin:18px 0 20px}
.hero-copy p{font-size:17px;color:var(--ink-soft);max-width:560px}
.hero-copy p b{color:var(--ink);font-weight:700}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-mini{display:flex;gap:34px;margin-top:36px;flex-wrap:wrap}
.hero-mini div{display:flex;flex-direction:column}
.hero-mini b{font-size:26px;font-weight:800;line-height:1.1;background:var(--grad-mix);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-mini span{font-size:12.5px;color:var(--muted);font-weight:600;margin-top:3px}

.hero-visual{position:relative;perspective:1300px}
.mock{padding:12px;border-radius:22px;transform:rotateY(-8deg) rotateX(3deg);transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.hero-visual:hover .mock{transform:rotateY(-3deg) rotateX(1deg)}
.mock-bar{display:flex;align-items:center;gap:7px;padding:3px 6px 12px}
.mock-bar i{width:11px;height:11px;border-radius:50%}
.mock-bar i:nth-child(1){background:#ff6159}.mock-bar i:nth-child(2){background:#febc2e}.mock-bar i:nth-child(3){background:#28c840}
.mock-bar span{margin-left:8px;font-size:12px;color:var(--muted);font-weight:600}
.mock img{border-radius:12px;border:1px solid var(--line);box-shadow:var(--sh-sm)}
.chip{position:absolute;display:flex;flex-direction:column;padding:12px 16px;border-radius:16px;box-shadow:var(--sh-md);animation:floaty 5s ease-in-out infinite}
.chip b{font-size:22px;font-weight:800;line-height:1}
.chip span{font-size:12px;color:var(--ink-soft);font-weight:600;margin-top:3px}
.chip.lite b{font-size:15.5px;letter-spacing:.3px}
.chip.lite span{font-size:11px}
.chip-1{left:-22px;top:19%}.chip-2{right:-18px;top:7%;animation-delay:-1.6s}
.chip-3{right:9%;bottom:-15px;padding:9px 13px;animation-delay:-3.1s}
.chip-4{left:-14px;bottom:15%;animation-delay:-2.3s}
.chip-5{right:-16px;bottom:31%;animation-delay:-3.9s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* 分班 Hero 缩略图放大 1.1× */
.mock.zoomed{transform:rotateY(-7deg) rotateX(2deg) scale(1.1)}
.hero-visual:hover .mock.zoomed{transform:rotateY(-3deg) rotateX(1deg) scale(1.1)}

/* ---------- 信任数据条 ---------- */
.stat-strip{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:26px 36px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;align-items:center;text-align:center;flex:1;min-width:130px}
.stat b{font-size:29px;font-weight:800;line-height:1.1}
.stat span{font-size:13px;color:var(--ink-soft);margin-top:7px;font-weight:600}
.divider{width:1px;height:46px;background:var(--line)}

/* ---------- 产品卡片 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod-card{position:relative;display:flex;flex-direction:column;min-height:280px;padding:24px 22px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .32s}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.prod-card.live{box-shadow:0 16px 44px -18px rgba(22,163,74,.5)}
.pc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.pc-icon{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:26px;
  background:rgba(255,255,255,.55);box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--sh-sm)}
.prod-card h3{font-size:clamp(26px,2.7vw,33px);font-weight:800;line-height:1.22;margin-bottom:10px;letter-spacing:-.3px}
.prod-card h3 small{display:inline-block;font-size:12px;font-weight:700;color:#fff;
  background:rgba(14,27,42,.4);padding:2px 9px;border-radius:7px;margin-left:7px;vertical-align:middle}
.prod-card p{font-size:13.8px;color:var(--ink-soft);flex:1}
.pc-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.pc-actions{display:flex;gap:10px;margin-top:18px}
.pc-actions .btn{flex:1}
.pc-dl{display:inline-flex;align-items:center;justify-content:center;gap:7px}
.pc-dl svg{width:16px;height:16px}

/* 校务卡片差异化背景色 */
.prod-card.c1{background:linear-gradient(160deg,rgba(22,163,74,.16),rgba(255,255,255,.55));border-color:rgba(22,163,74,.3)}
.prod-card.c2{background:linear-gradient(160deg,rgba(109,94,252,.15),rgba(255,255,255,.55));border-color:rgba(109,94,252,.28)}
.prod-card.c3{background:linear-gradient(160deg,rgba(8,182,212,.15),rgba(255,255,255,.55));border-color:rgba(8,182,212,.28)}
.prod-card.c4{background:linear-gradient(160deg,rgba(236,90,160,.14),rgba(255,255,255,.55));border-color:rgba(236,90,160,.26)}
.prod-card.c5{background:linear-gradient(160deg,rgba(246,168,33,.16),rgba(255,255,255,.55));border-color:rgba(246,168,33,.3)}
.prod-card.c6{background:linear-gradient(160deg,rgba(34,179,160,.16),rgba(255,255,255,.55));border-color:rgba(34,179,160,.3)}
.prod-card.c7{background:linear-gradient(160deg,rgba(99,102,241,.15),rgba(255,255,255,.55));border-color:rgba(99,102,241,.28)}
.prod-card.c8{background:linear-gradient(160deg,rgba(244,114,94,.15),rgba(255,255,255,.55));border-color:rgba(244,114,94,.28)}
.prod-card.c9{background:linear-gradient(160deg,rgba(56,160,255,.15),rgba(255,255,255,.55));border-color:rgba(56,160,255,.28)}

/* ---------- 筛选标签 ---------- */
.filters{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.filter{padding:9px 22px;border-radius:999px;font-weight:600;font-size:14.5px;color:var(--ink-soft);
  background:var(--glass-strong);border:1px solid var(--line);transition:.25s}
.filter:hover{color:var(--ink);border-color:rgba(109,94,252,.4);transform:translateY(-2px)}
.filter.is-active{color:#fff;background:var(--grad-mix);border-color:transparent;box-shadow:var(--sh-glow)}

/* ---------- 二级筛选（年级 / 科目） ---------- */
.subfilters{max-width:920px;margin:-14px auto 30px;padding:16px 18px;border-radius:16px;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-line);box-shadow:var(--sh-sm)}
.subfilters[hidden]{display:none}
.subrow{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.subrow+.subrow{margin-top:11px;padding-top:11px;border-top:1px solid var(--line)}
.subrow-label{font-size:13px;font-weight:800;color:var(--ink);min-width:42px}
.chipf{padding:6px 15px;border-radius:999px;font-size:13px;font-weight:600;color:var(--ink-soft);
  background:rgba(255,255,255,.55);border:1px solid var(--line);transition:.2s}
.chipf:hover{color:var(--ink);border-color:rgba(109,94,252,.4)}
.chipf.is-active{color:#fff;background:var(--grad-ai);border-color:transparent;box-shadow:0 6px 16px -8px rgba(109,94,252,.6)}

/* ---------- 课堂工具卡（每行 5 张） ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.tool-card{border-radius:16px;overflow:hidden;background:var(--glass);
  backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .32s}
.tool-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.tc-thumb{position:relative;aspect-ratio:16/11;display:grid;place-items:center;font-size:34px}
.tc-thumb::before{content:"";position:absolute;inset:0;background:radial-gradient(120% 120% at 20% 10%,rgba(255,255,255,.4),transparent 50%)}
.tc-thumb span{position:relative;filter:drop-shadow(0 6px 12px rgba(0,0,0,.22));transition:transform .45s}
.tool-card:hover .tc-thumb span{transform:scale(1.16) rotate(-5deg)}
.tc-thumb em{position:absolute;top:9px;right:9px;font-style:normal;font-size:10.5px;font-weight:700;color:#fff;
  background:rgba(14,27,42,.4);backdrop-filter:blur(4px);padding:3px 9px;border-radius:999px}
.t-a{background:linear-gradient(135deg,#16a34a,#08b6d4)}.t-b{background:linear-gradient(135deg,#6d5efc,#ec5aa0)}
.t-c{background:linear-gradient(135deg,#08b6d4,#6d5efc)}.t-d{background:linear-gradient(135deg,#f6a821,#ec5aa0)}
.t-e{background:linear-gradient(135deg,#16a34a,#6d5efc)}.t-f{background:linear-gradient(135deg,#ec5aa0,#8b5cf6)}
.t-g{background:linear-gradient(135deg,#08b6d4,#16a34a)}.t-h{background:linear-gradient(135deg,#6d5efc,#08b6d4)}
.t-i{background:linear-gradient(135deg,#22b3a0,#6d5efc)}.t-j{background:linear-gradient(135deg,#f6a821,#16a34a)}
.t-k{background:linear-gradient(135deg,#6366f1,#22b3a0)}.t-l{background:linear-gradient(135deg,#ec5aa0,#f6a821)}
.tc-body{padding:12px 13px 15px}
.tc-meta{font-size:11px;font-weight:700;color:var(--violet-deep)}
.tc-body h4{font-size:13.5px;font-weight:700;margin-top:5px;line-height:1.36}
.tool-empty{grid-column:1/-1;text-align:center;padding:40px;color:var(--ink-soft);font-weight:600}
.tools-note{text-align:center;margin-top:28px;color:var(--ink-soft);font-size:14.5px;font-weight:600}

/* ---------- 生态优势 ---------- */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.why-card{padding:28px 26px}
.why-ic{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;font-size:28px;
  background:rgba(109,94,252,.1);margin-bottom:16px;box-shadow:inset 0 1px 0 rgba(255,255,255,.7)}
.why-card h4{font-size:18px;font-weight:800;margin-bottom:9px}
.why-card p{font-size:14.5px;color:var(--ink-soft)}

/* ---------- CTA 条 ---------- */
.cta-band{position:relative;display:grid;grid-template-columns:1.4fr 1fr;gap:42px;align-items:center;padding:48px 46px;overflow:hidden}
.cta-glow{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 130% at 82% 0%,rgba(109,94,252,.18),transparent 58%),radial-gradient(50% 120% at 10% 100%,rgba(22,163,74,.14),transparent 60%)}
.cta-copy{position:relative}
.cta-copy h2{font-size:clamp(24px,3.3vw,33px);font-weight:800;line-height:1.22;margin:12px 0}
.cta-copy p{color:var(--ink-soft);max-width:480px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.cta-contact{position:relative;display:flex;flex-direction:column;gap:13px}
.cc-item{display:flex;align-items:center;gap:14px;padding:13px 17px;border-radius:14px;background:rgba(255,255,255,.55);border:1px solid var(--line);transition:.25s}
.cc-item:hover{transform:translateX(4px);border-color:rgba(109,94,252,.35)}
.cc-ic{font-size:21px;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(109,94,252,.1);flex:none}
.cc-item span{display:block;font-size:12px;color:var(--muted);font-weight:600}
.cc-item b{font-size:15px;font-weight:700}

/* ---------- 版块响应式 ---------- */
@media (max-width:1080px){.tool-grid{grid-template-columns:repeat(4,1fr)}}
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:46px}
  .hero-visual{max-width:560px;margin:0 auto}
  .prod-grid,.why-grid{grid-template-columns:repeat(2,1fr)}
  .tool-grid{grid-template-columns:repeat(3,1fr)}
  .cta-band{grid-template-columns:1fr;gap:30px;padding:38px 30px}
}
@media (max-width:640px){.tool-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){
  .prod-grid,.why-grid{grid-template-columns:1fr}
  .stat-strip{padding:22px 20px}.divider{display:none}.stat{min-width:46%}
  .chip-1{left:-6px}.chip-2{right:-6px}
  .hero-mini{gap:24px}
  .brand{font-size:21px;gap:11px}.brand .mark{width:46px;height:46px;font-size:24px}.brand .sub{font-size:11px}
}

/* ============================================================
   分班系统宣传页专属样式
   ============================================================ */

/* 产品 Hero 版本徽章 */
.ver{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:12.5px;font-weight:700;
  color:var(--brand-deep);background:var(--brand-soft);border:1px solid rgba(22,163,74,.25);padding:5px 12px;border-radius:999px}
.slogan{font-size:clamp(15px,1.8vw,18px);color:var(--violet-deep);font-weight:700;margin-top:8px}
.hero-visual .splash{padding:0;overflow:hidden;border-radius:20px}
.hero-visual .splash img{border-radius:20px}

/* 适用场景 */
.scene-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:8px}
.scene{display:flex;align-items:center;gap:10px;padding:14px 22px;border-radius:16px;font-weight:700;font-size:15.5px;
  background:var(--glass);backdrop-filter:blur(14px);border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:.28s}
.scene:hover{transform:translateY(-4px);box-shadow:var(--sh-md);color:var(--brand-deep)}
.scene .se{font-size:22px}

/* 功能图文块 */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;margin-bottom:30px}
.feature-media{position:relative}
.feature-frame{padding:11px;border-radius:22px}
.feature-frame img{border-radius:13px;border:1px solid var(--line);box-shadow:var(--sh-sm)}
.feature.rev .feature-media{order:2}
.fnum{position:absolute;top:-16px;left:-10px;width:54px;height:54px;border-radius:16px;display:grid;place-items:center;
  font-family:var(--mono);font-weight:700;font-size:20px;color:#fff;background:var(--grad-mix);box-shadow:var(--sh-glow);z-index:2}
.feature-text h3{font-size:clamp(23px,3vw,31px);font-weight:800;line-height:1.22;margin:14px 0 12px}
.feature-text>p{color:var(--ink-soft);font-size:16px;margin-bottom:22px;max-width:520px}
.flist{display:flex;flex-direction:column;gap:13px}
.flist li{display:flex;gap:13px;align-items:flex-start;font-size:15px;line-height:1.55}
.flist .ck{flex:none;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);font-size:13px;font-weight:800;margin-top:2px}
.flist li b{font-weight:700}.flist li span{color:var(--ink-soft)}
.model-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.model-tags .tag{background:rgba(109,94,252,.08);border-color:rgba(109,94,252,.18);color:var(--violet-deep);font-weight:600}

/* 价格卡 */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;align-items:stretch}
.price-grid.five{grid-template-columns:repeat(5,1fr);gap:15px}
.price-grid.five .price-card{padding:26px 17px}
.price-grid.five .price-tier{font-size:15.5px}
.price-grid.five .price-sub{font-size:11.8px;min-height:46px}
.price-grid.five .price-amount .num{font-size:35px}
.price-grid.five .price-amount .yuan{font-size:18px}
.price-grid.five .price-feats li{font-size:12.6px;gap:7px}
@media (max-width:1080px){.price-grid.five{grid-template-columns:repeat(3,1fr)}}
@media (max-width:760px){.price-grid.five{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.price-grid.five{grid-template-columns:1fr}}
.price-card{position:relative;display:flex;flex-direction:column;padding:30px 25px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .32s}
.price-card:hover{transform:translateY(-7px);box-shadow:var(--sh-lg)}
.price-card.featured{background:linear-gradient(180deg,rgba(109,94,252,.1),rgba(255,255,255,.6));
  border-color:rgba(109,94,252,.45);box-shadow:0 22px 56px -22px rgba(109,94,252,.55)}
.ribbon{position:absolute;top:-13px;left:50%;transform:translateX(-50%);z-index:2}
.price-name{font-size:18px;font-weight:800;display:flex;align-items:center;gap:8px}
.price-tier{font-size:18px}
.price-sub{font-size:13px;color:var(--ink-soft);margin-top:6px;min-height:36px;line-height:1.5}
.price-amount{display:flex;align-items:baseline;gap:3px;margin:16px 0 4px}
.price-amount .yuan{font-size:21px;font-weight:800}
.price-amount .num{font-size:42px;font-weight:800;line-height:1;letter-spacing:-1px}
.price-amount .unit{font-size:13px;color:var(--muted);font-weight:600;margin-left:3px}
.price-amount.free .num{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.price-line{height:1px;background:var(--line);margin:14px 0}
.price-feats{display:flex;flex-direction:column;gap:11px;margin-bottom:24px;flex:1}
.price-feats li{display:flex;gap:9px;font-size:13.8px;color:var(--ink-soft);line-height:1.5}
.price-feats .ck{flex:none;width:19px;height:19px;border-radius:6px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);font-size:11px;font-weight:800;margin-top:1px}
.price-feats .no{color:var(--muted)}.price-feats .no .ck{background:rgba(135,148,168,.16);color:var(--muted)}
.price-card .btn{width:100%}
.price-note{text-align:center;margin-top:26px;color:var(--ink-soft);font-size:14px}

/* 购买咨询大卡 */
.buy-card{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;padding:46px;overflow:hidden;position:relative}

@media (max-width:960px){
  .feature{grid-template-columns:1fr;gap:30px;margin-bottom:18px}
  .feature.rev .feature-media{order:0}
  .feature-text{order:2}
  .price-grid{grid-template-columns:repeat(2,1fr)}
  .buy-card{grid-template-columns:1fr;gap:28px;padding:34px 26px}
}
@media (max-width:600px){
  .price-grid{grid-template-columns:1fr}
  .scene{padding:12px 18px;font-size:14.5px}
}

/* ============================================================
   鼠标跟随光晕 spotlight（采纳 magic MCP 动画思路，原生实现）
   ============================================================ */
.spotlight{position:fixed;z-index:-1;top:0;left:0;width:620px;height:620px;border-radius:50%;
  pointer-events:none;transform:translate(-50%,-50%);opacity:0;transition:opacity .5s ease;
  background:radial-gradient(circle,rgba(109,94,252,.20),rgba(22,163,74,.12) 42%,transparent 70%);
  filter:blur(14px);mix-blend-mode:plus-lighter}
@media (hover:none){.spotlight{display:none}}
@media (prefers-reduced-motion:reduce){.spotlight{display:none}}

/* ============================================================
   教学插件工具版块（框架占位）
   ============================================================ */
.plugin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.plugin-card{display:flex;align-items:flex-start;gap:16px;padding:22px 22px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:transform .3s,box-shadow .3s}
.plugin-card:hover{transform:translateY(-5px);box-shadow:var(--sh-lg)}
.pg-ic{flex:none;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:25px;
  background:rgba(255,255,255,.55);box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--sh-sm)}
.pg-body{flex:1}
.pg-body .pg-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.pg-body h4{font-size:17px;font-weight:800}
.pg-body p{font-size:13.5px;color:var(--ink-soft)}
@media (max-width:960px){.plugin-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.plugin-grid{grid-template-columns:1fr}}

/* ============================================================
   v3 新增：数字人板块 / 更多按钮 / 搜索高亮 / 锚点偏移
   ============================================================ */

/* 锚点 / 搜索定位时避开吸顶导航 */
section[id]{scroll-margin-top:84px}
.prod-card,.tool-card,.plugin-card,.dh-card{scroll-margin-top:104px}

/* 教师个人数字人 */
.dh-intro{max-width:860px;margin:0 auto 32px;text-align:center;color:var(--ink-soft);font-size:16px;line-height:1.7}
.dh-intro b{color:var(--ink)}
.dh-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dh-card{position:relative;display:flex;flex-direction:column;padding:26px 24px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-line);box-shadow:var(--sh-sm);transition:transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .32s}
.dh-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.dh-card .pc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.dh-ic{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;font-size:27px;
  background:rgba(255,255,255,.55);box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--sh-sm)}
.dh-card h4{font-size:19px;font-weight:800;margin-bottom:9px;line-height:1.3}
.dh-card p{font-size:14px;color:var(--ink-soft);flex:1}
.dh-card.feat{background:linear-gradient(160deg,rgba(109,94,252,.14),rgba(255,255,255,.55));border-color:rgba(109,94,252,.3)}
.dh-tag{display:inline-flex;align-items:center;gap:5px;margin-top:14px;font-size:12.5px;font-weight:700;color:var(--violet-deep)}

/* “更多”按钮（右下角占位） */
.more-wrap{display:flex;justify-content:flex-end;margin-top:22px}
.more-btn{display:inline-flex;align-items:center;gap:9px;padding:11px 26px;border-radius:999px;font-size:15px;font-weight:700;
  color:var(--violet-deep);background:var(--glass-strong);border:1px solid rgba(109,94,252,.28);box-shadow:var(--sh-sm);transition:.25s}
.more-btn:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:rgba(109,94,252,.5)}
.more-btn svg{width:17px;height:17px;transition:transform .3s}
.more-btn.open svg{transform:rotate(180deg)}
.more-btn .cnt{color:var(--muted);font-weight:600}

/* 搜索命中高亮 */
.search-hit{box-shadow:0 0 0 3px #f97316,0 0 0 9px rgba(249,115,22,.22)!important;animation:hitpulse 1.3s ease 2}
@keyframes hitpulse{0%,100%{box-shadow:0 0 0 3px #f97316,0 0 0 9px rgba(249,115,22,.22)}50%{box-shadow:0 0 0 3px #f97316,0 0 0 16px rgba(249,115,22,0)}}
.search-dim{opacity:.4;filter:saturate(.6);transition:opacity .3s}

/* 搜索结果提示条 */
.search-toast{position:fixed;left:50%;top:78px;transform:translateX(-50%) translateY(-12px);z-index:200;opacity:0;pointer-events:none;
  padding:10px 20px;border-radius:999px;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(120deg,#6d5efc,#8b5cf6);
  box-shadow:var(--sh-md);transition:opacity .3s,transform .3s}
.search-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.search-toast.warn{background:linear-gradient(120deg,#fb923c,#f97316)}

/* 移动端菜单内搜索 */
.m-search{display:flex;gap:8px;margin:4px 0 10px;padding:6px 6px 6px 14px;border-radius:14px;background:rgba(255,255,255,.6);border:1px solid var(--line)}
.m-search input{flex:1;border:none;background:none;outline:none;font-size:15px;font-family:inherit;color:var(--ink)}
.m-search button{flex:none;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:#fff;background:var(--grad-mix)}
.m-search button svg{width:18px;height:18px}

@media (max-width:960px){.dh-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.dh-grid{grid-template-columns:1fr}}

/* ============================================================
   下载版本选择弹窗
   ============================================================ */
.dl-overlay{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center;padding:20px;
  background:rgba(14,27,42,.46);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  opacity:0;transition:opacity .26s}
.dl-overlay.show{opacity:1}
.dl-modal{width:min(94vw,470px);padding:24px 24px 22px;border-radius:24px;
  background:rgba(255,255,255,.95);border:1px solid var(--glass-line);box-shadow:var(--sh-lg);
  transform:translateY(16px) scale(.96);transition:transform .3s cubic-bezier(.2,.8,.2,1)}
.dl-overlay.show .dl-modal{transform:none}
.dl-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.dl-top h3{font-size:20px;font-weight:800}
.dl-top p{font-size:13px;color:var(--ink-soft);margin-top:3px}
.dl-x{flex:none;width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:var(--ink-soft);
  background:rgba(135,148,168,.14);transition:.2s}
.dl-x:hover{background:rgba(135,148,168,.26);color:var(--ink)}
.dl-x svg{width:18px;height:18px}
.dl-opts{display:grid;gap:13px;margin-top:18px}
.dl-opt{display:flex;align-items:center;gap:15px;padding:15px;border-radius:16px;cursor:pointer;text-align:left;width:100%;
  background:var(--glass-strong);border:1px solid var(--line);transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s,border-color .24s}
.dl-opt:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:rgba(22,163,74,.5)}
.dl-opt .ic{flex:none;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:26px;color:#fff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4)}
.dl-opt.p .ic{background:var(--grad-brand)}
.dl-opt.z .ic{background:var(--grad-ai)}
.dl-opt .tx{flex:1;min-width:0}
.dl-opt .tx b{display:block;font-size:16px;font-weight:800}
.dl-opt .tx span{font-size:12.5px;color:var(--ink-soft)}
.dl-opt .sz{font-size:12px;color:var(--muted);font-weight:600;white-space:nowrap}
.dl-opt .dlic{flex:none;color:var(--brand-deep);transition:transform .24s}
.dl-opt:hover .dlic{transform:translateY(2px)}
.dl-opt .dlic svg{width:20px;height:20px}
.dl-note{margin-top:16px;font-size:12px;color:var(--muted);text-align:center}

/* ============================================================
   v8.0 详情页：分班痛点对照 + 有问有答 + 备案
   ============================================================ */
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.pain-card{padding:22px;border-radius:18px;background:var(--glass);backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);border:1px solid var(--glass-line);box-shadow:var(--sh-sm);
  transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.pain-q{display:flex;gap:10px;align-items:flex-start;font-size:16px;font-weight:800;color:var(--ink);line-height:1.5}
.pain-tag{flex:none;font-size:12px;font-weight:800;color:#fff;background:linear-gradient(120deg,#fb923c,#ef4444);
  padding:3px 11px;border-radius:8px;margin-top:3px}
.pain-fn{display:flex;gap:9px;align-items:center;margin:13px 0 9px;font-size:15px;font-weight:800;color:var(--brand-deep)}
.pain-fn .pf-ic{flex:none;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);font-size:13px;font-weight:800}
.pain-how{font-size:13.8px;color:var(--ink-soft);line-height:1.65}
.pain-how b{color:var(--ink);font-weight:700}

.qa-list{display:flex;flex-direction:column;gap:16px;max-width:900px;margin:0 auto}
.qa-item{padding:24px 26px;border-radius:18px;background:var(--glass);backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);border:1px solid var(--glass-line);box-shadow:var(--sh-sm)}
.qa-q{display:flex;gap:13px;align-items:center;font-size:18px;font-weight:800;color:var(--ink);line-height:1.45}
.qa-num{flex:none;height:38px;padding:0 13px;border-radius:11px;display:inline-grid;place-items:center;color:#fff;
  font-weight:800;font-size:15px;background:var(--grad-mix);letter-spacing:.5px;white-space:nowrap}
.qa-a{margin-top:13px;font-size:15px;color:var(--ink-soft);line-height:1.8}
.qa-a b{color:var(--ink);font-weight:700}
.qa-imgs{margin-top:16px;display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.qa-imgs img{max-width:100%;max-height:420px;width:auto;height:auto;border-radius:12px;border:1px solid var(--line);
  box-shadow:var(--sh-sm);background:#fff;padding:6px}

.beian{color:var(--muted);font-size:13px;transition:.2s}
.beian:hover{color:var(--brand-deep)}
.foot-bottom br+.beian{display:inline-block;margin-top:4px}

@media (max-width:760px){.pain-grid{grid-template-columns:1fr}.qa-q{font-size:16.5px}}