/* k12-topic scoped mobile=0 */
.k12-topic{position:relative;isolation:isolate;overflow-x:clip;max-width:100%;min-width:0}
/* ===== K12智能学习平台 · 编辑式玻璃拟态风 ===== */
.k12-topic{
  --sky:#3b9ae0;       /* 天空蓝 */
  --mint:#2dc8a8;      /* 薄荷绿 */
  --teal:#23b8c5;      /* 青绿 */
  --aqua:#7fe3d6;      /* 浅水绿 */
  --ink:#0d2a33;
  --ink-2:#527682;
  --ink-3:#94a8b0;
  --paper:#fbfdfd;
  --glass:rgba(255,255,255,.66);
  --glass-strong:rgba(255,255,255,.82);
  --line:rgba(20,80,90,.1);
  --line-soft:rgba(20,80,90,.06);
  --grad:linear-gradient(120deg,#3b9ae0 0%,#2dc8a8 100%);
  --grad-deep:linear-gradient(135deg,#2f8fd0 0%,#22b39a 100%);
  --grad-soft:linear-gradient(135deg,rgba(59,154,224,.12),rgba(45,200,168,.08));
  --shadow-s:0 4px 18px rgba(20,80,90,.06);
  --shadow-m:0 14px 40px rgba(20,80,90,.1);
  --shadow-l:0 30px 70px rgba(20,80,90,.16);
  --r:22px;
  --r-l:30px;
}
.k12-topic,.k12-topic *{margin:0;padding:0;box-sizing:border-box}
.k12-topic{scroll-behavior:smooth}
.k12-topic{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--paper);color:var(--ink);line-height:1.75;overflow-x:hidden;-webkit-font-smoothing:antialiased;
  letter-spacing:.1px;
}
.k12-topic a{color:inherit;text-decoration:none}
.k12-topic img{max-width:100%;display:block}
.k12-topic .wrap{max-width:1200px;margin:0 auto;}
.k12-topic .icon{display:inline-flex;align-items:center;justify-content:center;color:var(--sky);line-height:0}
.k12-topic .icon svg{width:1em;height:1em;display:block}

/* 背景：柔和大色块 + 网格细纹 */
.k12-topic .bg-canvas{position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(60% 50% at 12% 0%,rgba(59,154,224,.14),transparent 60%),
    radial-gradient(50% 45% at 92% 6%,rgba(45,200,168,.13),transparent 60%),
    radial-gradient(55% 40% at 70% 100%,rgba(127,227,214,.16),transparent 60%),
    radial-gradient(40% 30% at 20% 80%,rgba(59,154,224,.08),transparent 60%),
    linear-gradient(180deg,#fbfdfd 0%,#f1f9f8 100%);
}
.k12-topic .bg-canvas::after{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(20,80,90,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(20,80,90,.04) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000,transparent 75%);
  mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000,transparent 75%);
}

/* 通用按钮 */
.k12-topic .btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:40px;font-size:18px;font-weight:600;background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(45,200,168,.32);transition:transform .25s,box-shadow .25s}
.k12-topic .btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(45,200,168,.42)}
.k12-topic .btn .icon{color:#fff;font-size:18px}
.k12-topic .btn.ghost{background:var(--glass-strong);backdrop-filter:blur(10px);border:1px solid var(--line);box-shadow:var(--shadow-s);color:var(--ink)}
.k12-topic .btn.ghost:hover{border-color:var(--sky)}

/* 章节头：横线 + 小标签（区别于胶囊眉标） */
.k12-topic .sec-head{max-width:760px;margin-bottom:56px}
.k12-topic .sec-kicker{display:inline-flex;align-items:center;gap:14px;font-size:16px;letter-spacing:3px;color:var(--sky);text-transform:uppercase;font-weight:700;margin-bottom:20px}
.k12-topic .sec-kicker::before,.k12-topic .sec-kicker::after{content:"";width:40px;height:2px;border-radius:2px;background:var(--grad);flex:0 0 auto}
.k12-topic .sec-head h2{font-size:clamp(30px,4.4vw,48px);font-weight:800;line-height:1.2;letter-spacing:-.5px;margin-bottom:18px}
.k12-topic .sec-head h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.k12-topic .sec-head p{font-size:17px;color:var(--ink-2);max-width:640px}
.k12-topic .sec-head.center{text-align:center;margin-left:auto;margin-right:auto}
.k12-topic .sec-head.center .sec-kicker{justify-content:center}

.k12-topic section{position:relative;padding:108px 0}

/* ===== Hero：非对称两栏 + 玻璃学习驾驶舱 ===== */
.k12-topic .hero{padding:64px 0 80px;position:relative}
.k12-topic .hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center}
.k12-topic .hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:15px;letter-spacing:3px;color:var(--sky);text-transform:uppercase;font-weight:700;margin-bottom:22px}
.k12-topic .hero-kicker .dot{width:8px;height:8px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(45,200,168,.18)}
.k12-topic .hero h1{font-size:clamp(40px,5.8vw,54px);font-weight:900;line-height:1.12;letter-spacing:-1.2px;margin-bottom:24px}
.k12-topic .hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.k12-topic .hero h1 .thin{font-weight:300;color:var(--ink-2)}
.k12-topic .hero p.lead{font-size:18px;color:var(--ink-2);max-width:520px;margin-bottom:32px}
.k12-topic .hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 学习驾驶舱（玻璃面板） */
.k12-topic .cockpit{position:relative;padding:30px;border-radius:var(--r-l);background:var(--glass);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.6);box-shadow:var(--shadow-l);}
.k12-topic .cockpit::before{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:.6;z-index:-1}
.k12-topic .ck-top{display:flex;align-items:center;gap:16px;margin-bottom:22px}
.k12-topic .ck-avatar{position:relative;width:64px;height:64px;border-radius:50%;display:grid;place-items:center;color:#fff;flex-shrink:0;background:var(--grad);box-shadow:0 8px 20px rgba(45,200,168,.4)}
.k12-topic .ck-avatar .icon{font-size:30px;color:#fff}
.k12-topic .ck-avatar::after{content:"";position:absolute;inset:-6px;border-radius:50%;border:2px solid rgba(45,200,168,.4);animation:k12-pulse 2.6s ease-out infinite}
@keyframes k12-pulse{0%{transform:scale(.9);opacity:.7}100%{transform:scale(1.5);opacity:0}}
.k12-topic .ck-name{font-size:18px;font-weight:700}
.k12-topic .ck-status{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--mint);margin-top:2px}
.k12-topic .ck-status .live{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 3px rgba(45,200,168,.2);animation:k12-blink 1.6s ease-in-out infinite}
@keyframes k12-blink{0%,100%{opacity:1}50%{opacity:.4}}

/* 声音克隆波形 */
.k12-topic .ck-voice{background:var(--glass-strong);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;margin-bottom:16px}
.k12-topic .ck-voice-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.k12-topic .ck-voice-label{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600}
.k12-topic .ck-voice-label .icon{font-size:18px}
.k12-topic .ck-voice-tag{font-size:12px;color:var(--mint);font-weight:600}
.k12-topic .ck-wave{display:flex;align-items:center;gap:3px;height:42px}
.k12-topic .ck-bar{flex:1;border-radius:4px;background:var(--grad);opacity:.85;transform-origin:center;animation:k12-wave 1.2s ease-in-out infinite}
@keyframes k12-wave{0%,100%{transform:scaleY(.28)}50%{transform:scaleY(1)}}

/* 双小面板 */
.k12-topic .ck-cols{display:grid;grid-template-columns:1fr 1.2fr;gap:14px}
.k12-topic .ck-col{background:var(--glass-strong);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.k12-topic .ck-col .ck-cl{font-size:12px;color:var(--ink-3);letter-spacing:1px;text-transform:uppercase;margin-bottom:10px}
.k12-topic .ring{position:relative;width:64px;height:64px}
.k12-topic .ring svg{transform:rotate(-90deg)}
.k12-topic .ring .bg-ring{fill:none;stroke:rgba(20,80,90,.1);stroke-width:6}
.k12-topic .ring .fg-ring{fill:none;stroke:url(#gradId);stroke-width:6;stroke-linecap:round;transition:stroke-dashoffset 1.2s}
.k12-topic .ring .ring-n{position:absolute;inset:0;display:grid;place-items:center;font-size:18px;font-weight:800;color:var(--sky)}
.k12-topic .ck-ring-wrap{display:flex;align-items:center;gap:14px}
.k12-topic .ck-ring-info .rn{font-size:14px;font-weight:700;margin-bottom:2px}
.k12-topic .ck-ring-info .rs{font-size:12px;color:var(--ink-3)}
.k12-topic .ck-chat{display:flex;flex-direction:column;gap:8px}
.k12-topic .ck-msg{font-size:13px;padding:9px 12px;border-radius:12px;max-width:90%}
.k12-topic .ck-msg.t{background:var(--grad-soft);color:var(--ink);align-self:flex-start;border:1px solid var(--line)}
.k12-topic .ck-msg.s{background:var(--grad);color:#fff;align-self:flex-end}
.k12-topic .ck-chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.k12-topic .ck-chip{font-size:11px;padding:4px 10px;border-radius:20px;background:var(--glass-strong);border:1px solid var(--line);color:var(--ink-2)}
/* 漂浮装饰 */
.k12-topic .ck-float{position:absolute;font-size:13px;font-weight:600;padding:8px 14px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-m);display:flex;align-items:center;gap:7px;animation:k12-floaty 5s ease-in-out infinite}
.k12-topic .ck-float .icon{font-size:16px}
.k12-topic .ck-float.f1{top:-18px;right:24px}
.k12-topic .ck-float.f2{bottom:-16px;left:-14px;animation-delay:1.4s}
@keyframes k12-floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ===== 核心能力：纵向往返（zig-zag） ===== */
.k12-topic .cap-row{display:grid;grid-template-columns:.92fr 1.08fr;gap:54px;align-items:center;margin-bottom:90px}
.k12-topic .cap-row:nth-child(even){direction:rtl}
.k12-topic .cap-row:nth-child(even) > *{direction:ltr}
.k12-topic .cap-visual{position:relative;min-height:300px;border-radius:var(--r-l);background:var(--grad-soft);border:1px solid var(--line);box-shadow:var(--shadow-m);display:grid;place-items:center;overflow:hidden;padding:36px}
.k12-topic .cap-visual::before{content:"";position:absolute;inset:0;background:
  radial-gradient(70% 60% at 30% 20%,rgba(59,154,224,.16),transparent 60%),
  radial-gradient(60% 50% at 80% 90%,rgba(45,200,168,.14),transparent 60%)}
.k12-topic .cap-body .cap-num{font-family:"SF Mono",Consolas,monospace;font-size:14px;color:var(--sky);letter-spacing:2px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.k12-topic .cap-body .cap-num::after{content:"";flex:0 0 40px;height:1px;background:var(--line)}
.k12-topic .cap-body h3{font-size:clamp(26px,3vw,34px);font-weight:800;margin-bottom:16px;line-height:1.2}
.k12-topic .cap-body h3 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.k12-topic .cap-body p{font-size:16px;color:var(--ink-2);margin-bottom:22px;max-width:480px}
.k12-topic .cap-tags{display:flex;gap:8px;flex-wrap:wrap}
.k12-topic .cap-tags span{font-size:13px;padding:6px 14px;border-radius:24px;color:var(--ink-2);background:#fff;border:1px solid var(--line)}

/* 能力可视化组件 */
.k12-topic .radar{position:relative;width:230px;height:230px}
.k12-topic .radar .rd-circle{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);border:1px solid rgba(45,200,168,.22);border-radius:50%}
.k12-topic .radar .rd-circle.c1{width:100%;height:100%}
.k12-topic .radar .rd-circle.c2{width:72%;height:72%}
.k12-topic .radar .rd-circle.c3{width:44%;height:44%}
.k12-topic .radar .rd-sweep{position:absolute;top:50%;left:50%;width:50%;height:50%;transform-origin:left center;background:conic-gradient(from 0deg,rgba(45,200,168,.35),transparent 60deg);border-radius:0 0 100% 0;animation:k12-sweep 3.2s linear infinite;transform:translate(0,-100%)}
@keyframes k12-sweep{to{transform:translate(0,-100%) rotate(360deg)}}
.k12-topic .radar .rd-core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:54px;height:54px;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#fff;box-shadow:0 8px 22px rgba(45,200,168,.45)}
.k12-topic .radar .rd-core .icon{font-size:26px;color:#fff}
.k12-topic .radar .rd-dot{position:absolute;width:10px;height:10px;border-radius:50%;background:var(--sky);box-shadow:0 0 0 4px rgba(59,154,224,.18)}
.k12-topic .dim-bars{position:absolute;bottom:14px;left:14px;right:14px;display:flex;gap:6px;align-items:flex-end;height:40px}
.k12-topic .dim-bars i{flex:1;border-radius:3px;background:var(--grad);opacity:.85}

/* 数字人头像组 */
.k12-topic .face-stage{position:relative;width:200px;height:200px}
.k12-topic .face-stage .fc{position:absolute;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#fff;box-shadow:0 8px 20px rgba(45,200,168,.35)}
.k12-topic .face-stage .fc .icon{color:#fff}
.k12-topic .face-stage .fc.main{width:120px;height:120px;top:50%;left:50%;transform:translate(-50%,-50%);font-size:0}
.k12-topic .face-stage .fc.main .icon{font-size:46px}
.k12-topic .face-stage .fc.s1{width:44px;height:44px;top:6px;left:14px;opacity:.7}
.k12-topic .face-stage .fc.s1 .icon{font-size:20px}
.k12-topic .face-stage .fc.s2{width:38px;height:38px;bottom:18px;right:8px;opacity:.6;background:linear-gradient(135deg,var(--teal),var(--sky))}
.k12-topic .face-stage .fc.s2 .icon{font-size:18px}
.k12-topic .face-stage .fc.s3{width:32px;height:32px;top:20px;right:0;opacity:.5;background:var(--sky)}
.k12-topic .face-stage .fc.s3 .icon{font-size:15px}

/* 声音克隆：A→B 匹配 */
.k12-topic .clone{display:flex;align-items:center;gap:24px}
.k12-topic .clone .cl-wave{display:flex;align-items:center;gap:3px;height:80px;width:90px}
.k12-topic .clone .cl-wave i{flex:1;border-radius:3px;background:var(--sky);opacity:.7}
.k12-topic .clone .cl-wave.b i{background:var(--mint)}
.k12-topic .clone .arrow{font-size:34px;color:var(--mint);display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-s)}
.k12-topic .clone .arrow .icon{font-size:22px;color:var(--mint)}

/* 沉浸屏幕框 */
.k12-topic .screen{position:relative;width:240px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-m);padding:8px}
.k12-topic .screen .sc-top{height:8px;display:flex;gap:4px;margin-bottom:8px}
.k12-topic .screen .sc-top i{width:8px;height:8px;border-radius:50%;background:var(--line)}
.k12-topic .screen .sc-face{aspect-ratio:16/10;border-radius:10px;background:var(--grad);position:relative;display:grid;place-items:center;overflow:hidden}
.k12-topic .screen .sc-face .icon{font-size:40px;color:#fff;opacity:.9}
.k12-topic .screen .sc-reticle{position:absolute;inset:10%;border:2px dashed rgba(255,255,255,.7);border-radius:10px}
.k12-topic .screen .sc-corner{position:absolute;width:14px;height:14px;border:2px solid #fff}
.k12-topic .screen .sc-corner.tl{top:8px;left:8px;border-right:none;border-bottom:none}
.k12-topic .screen .sc-corner.br{bottom:8px;right:8px;border-left:none;border-top:none}

/* ===== 导师矩阵：单行轮播 + 图片卡 ===== */
.k12-topic .tutor-marquee{overflow:hidden;padding:14px 0 28px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 5%,#000 95%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 5%,#000 95%,transparent)}
.k12-topic .tutor-rail{display:flex;gap:22px;width:max-content;will-change:transform;animation:k12-scrollX 60s linear infinite}
.k12-topic .tutor-rail:hover{animation-play-state:paused}
@keyframes k12-scrollX{to{transform:translateX(-50%)}}
.k12-topic .t-card{position:relative;flex:0 0 260px;height:380px;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-m);background:#eaf4f3;transition:transform .35s,box-shadow .35s}
.k12-topic .t-card img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
.k12-topic .t-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-l)}
.k12-topic .t-card:hover img{transform:scale(1.06)}
.k12-topic .t-card .t-badge{position:absolute;top:14px;right:16px;font-size:12px;font-weight:700;color:var(--ink-2);background:rgba(255,255,255,.86);backdrop-filter:blur(6px);padding:3px 10px;border-radius:20px;font-family:"SF Mono",monospace;z-index:2}
.k12-topic .t-overlay{position:absolute;left:0;right:0;bottom:0;padding:24px 20px 18px;background:linear-gradient(to top,rgba(255,255,255,.98) 0%,rgba(255,255,255,.95) 38%,rgba(255,255,255,.55) 66%,transparent 90%);z-index:1}
.k12-topic .t-overlay h3{font-size:17px;margin-bottom:3px;color:var(--ink)}
.k12-topic .t-overlay .t-en{font-size:12px;color:var(--sky);font-family:"SF Mono",monospace;letter-spacing:.5px;margin-bottom:8px}
.k12-topic .t-overlay p{font-size:13px;color:var(--ink-2);line-height:1.55}
.k12-topic #tutors .wrap{max-width:100%;}

/* ===== 学习闭环：纵向时间线 ===== */
.k12-topic .timeline{position:relative;padding-left:0}
.k12-topic .timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(var(--sky),var(--mint));transform:translateX(-50%)}
.k12-topic .tl-node{position:relative;display:grid;grid-template-columns:1fr 80px 1fr;align-items:center;margin-bottom:46px}
.k12-topic .tl-node:last-child{margin-bottom:0}
.k12-topic .tl-card{padding:22px 24px;border-radius:var(--r);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-s)}
.k12-topic .tl-node.left .tl-card{grid-column:1}
.k12-topic .tl-node.right .tl-card{grid-column:3}
.k12-topic .tl-dot{grid-column:2;display:grid;place-items:center;position:relative;z-index:2}
.k12-topic .tl-dot .d{width:54px;height:54px;border-radius:50%;background:#fff;border:2px solid var(--line);display:grid;place-items:center;font-size:24px;color:var(--sky);box-shadow:0 0 0 6px var(--paper),var(--shadow-s)}
.k12-topic .tl-card .tl-sub{font-size:13px;color:var(--sky);font-family:"SF Mono",monospace;letter-spacing:1px;margin-bottom:6px}
.k12-topic .tl-card h3{font-size:20px;margin-bottom:12px}
.k12-topic .tl-card ul{list-style:none}
.k12-topic .tl-card li{font-size:15px;color:var(--ink-2);padding:3px 0 3px 22px;position:relative}
.k12-topic .tl-card li::before{content:"";position:absolute;left:0;top:50%;margin-top:-4px;width:8px;height:8px;border-radius:2px;background:var(--grad)}

/* ===== 对比：清爽双栏 ===== */
.k12-topic .cmp{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.k12-topic .cmp-col{padding:30px;border-radius:var(--r);border:1px solid var(--line);position:relative}
.k12-topic .cmp-col.old{background:#fff;}
.k12-topic .cmp-col.new{background:var(--grad-soft);border-color:rgba(45,200,168,.3)}
.k12-topic .cmp-col h3{font-size:20px;margin-bottom:4px}
.k12-topic .cmp-col .cmp-tag{font-size:13px;color:var(--ink-3);font-family:"SF Mono",monospace;letter-spacing:1px;margin-bottom:22px}
.k12-topic .cmp-col.new .cmp-tag{color:var(--mint)}
.k12-topic .cmp-row{display:flex;align-items:flex-start;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line-soft)}
.k12-topic .cmp-row:last-child{border-bottom:none}
.k12-topic .cmp-row .ic{flex:0 0 22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;margin-top:2px}
.k12-topic .cmp-row .ic.no{background:rgba(180,90,90,.12);color:#c47b7b}
.k12-topic .cmp-row .ic.yes{background:rgba(45,200,168,.16);color:var(--mint)}
.k12-topic .cmp-row .kv .k{font-size:13px;color:var(--ink-3);margin-bottom:1px}
.k12-topic .cmp-row .kv .v{font-size:15px;color:var(--ink)}
.k12-topic .cmp-row .ic.no svg{color:#d25858;}
.k12-topic .cmp .reveal.d1 .k{color:#2e6251;}

/* ===== 数据：大字编辑式 ===== */
.k12-topic .stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.k12-topic .stat{padding:34px 20px;text-align:center;position:relative}
.k12-topic .stat:not(:last-child)::after{content:"";position:absolute;right:0;top:20%;height:60%;width:1px;background:var(--line)}
.k12-topic .stat .n{font-size:clamp(38px,5vw,56px);font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}
.k12-topic .stat .n .u{font-size:.5em;vertical-align:top;margin-left:1px}
.k12-topic .stat .l{font-size:15px;font-weight:600;margin-bottom:2px}
.k12-topic .stat .ls{font-size:13px;color:var(--ink-3)}

.k12-topic .pillars{margin-top:30px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.k12-topic .pillar{padding:28px;border-radius:var(--r);background:var(--glass-strong);backdrop-filter:blur(10px);border:1px solid var(--line);box-shadow:var(--shadow-s)}
.k12-topic .pillar .p-ico{font-size:26px;margin-bottom:12px;color:var(--sky)}
.k12-topic .pillar h3{font-size:17px;margin-bottom:4px}
.k12-topic .pillar .p-sub{font-size:12px;color:var(--sky);font-family:"SF Mono",monospace;letter-spacing:1px;margin-bottom:12px}
.k12-topic .pillar p{font-size:14px;color:var(--ink-2)}

/* ===== 愿景 ===== */
.k12-topic .vision{text-align:center;position:relative;overflow:hidden}
.k12-topic .vision::before{content:"";position:absolute;left:50%;top:-10%;transform:translateX(-50%);width:120%;height:420px;background:radial-gradient(ellipse at center,rgba(59,154,224,.14),transparent 60%)}
.k12-topic .vision .wrap{position:relative;z-index:1}
.k12-topic .vision h2{font-size:clamp(32px,4.6vw,50px);font-weight:800;margin:18px 0 22px;line-height:1.2}
.k12-topic .vision h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.k12-topic .vision p.lead{font-size:18px;color:var(--ink-2);max-width:700px;margin:0 auto 30px}
.k12-topic .vision .mini{display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--mint);padding:10px 22px;border-radius:30px;background:var(--grad-soft);border:1px solid rgba(45,200,168,.26)}

/* ===== CTA ===== */
.k12-topic #cta{padding:0}
.k12-topic .cta-band{padding:80px 32px;background:var(--grad-deep);position:relative;overflow:hidden;border-radius:0}
.k12-topic .cta-band::before,.k12-topic .cta-band::after{content:"";position:absolute;border-radius:50%;filter:blur(8px);opacity:.5}
.k12-topic .cta-band::before{width:300px;height:300px;background:rgba(255,255,255,.18);top:-120px;right:-60px}
.k12-topic .cta-band::after{width:260px;height:260px;background:rgba(127,227,214,.25);bottom:-140px;left:-40px}
.k12-topic .cta-inner{max-width:780px;margin:0 auto;text-align:center;position:relative;z-index:1}
.k12-topic .cta-inner h3{font-size:clamp(24px,3vw,32px);color:#fff;margin-bottom:12px;font-weight:800}
.k12-topic .cta-inner p{color:rgba(255,255,255,.88);margin-bottom:26px;font-size:16px}
.k12-topic .cta-inner .btn{background:#fff;color:var(--mint);box-shadow:0 12px 30px rgba(0,0,0,.16)}
.k12-topic .cta-inner .btn:hover{transform:translateY(-2px)}
.k12-topic .cta-inner .btn .icon{color:var(--mint)}

.k12-topic .tl-card{ display:flex; align-items: center; justify-content: space-between;}
.k12-topic .tl-card .tl_left{}
.k12-topic .tl-card .tl_right{width:50%;}
.k12-topic .tl-card .tl_right img{width:100%;}

/* 滚动渐入 */
.k12-topic .reveal{opacity:0;transform:translateY(36px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.k12-topic .reveal.in{opacity:1;transform:none}
.k12-topic .reveal.d1{transition-delay:.1s}.k12-topic .reveal.d2{transition-delay:.2s}.k12-topic .reveal.d3{transition-delay:.3s}.k12-topic .reveal.d4{transition-delay:.4s}
.k12-topic .first_a{background:url("/template/fr/images/product-topics/k12/bg_ic.png") no-repeat right bottom;background-size:32% auto;opacity:.9}

/* 响应式 */
@media(max-width:1024px){
  .k12-topic .hero-grid{grid-template-columns:1fr;gap:48px}
  .k12-topic .cockpit{max-width:480px}
  .k12-topic .cap-row,.k12-topic .cap-row:nth-child(even){grid-template-columns:1fr;gap:32px;direction:ltr;text-align:left}
  .k12-topic .cap-visual{min-height:240px}
  .k12-topic .timeline::before{left:27px}
  .k12-topic .tl-node{grid-template-columns:54px 1fr;grid-column-gap:0;align-items:center}
  .k12-topic .tl-node.left .tl-card,.k12-topic .tl-node.right .tl-card{grid-column:2;grid-row:1}
  .k12-topic .tl-node .tl-dot{grid-column:1;grid-row:1;justify-self:start;align-self:center}
  .k12-topic .cmp{grid-template-columns:1fr}
  .k12-topic .pillars{grid-template-columns:1fr}
}
@media(max-width:640px){
  .k12-topic .wrap{padding:0 20px}
  .k12-topic section{padding:72px 0}
  .k12-topic .hero{padding:40px 0 60px}
  .k12-topic .hero-trust{gap:20px}
  .k12-topic .stats-row{grid-template-columns:repeat(2,1fr)}
  .k12-topic .stat:nth-child(2)::after{display:none}
  .k12-topic .stat{border-bottom:1px solid var(--line)}
  .k12-topic .stat:nth-child(3),.k12-topic .stat:nth-child(4){border-bottom:none}
  .k12-topic .t-card{flex:0 0 200px;height:300px}
  .k12-topic .cap-body h3{font-size:24px}
  .k12-topic .ck-float{display:none}
  .k12-topic .clone{gap:14px}
  .k12-topic .clone .cl-wave{width:64px;height:56px}
  .k12-topic .first_a{background-size:0}
	.k12-topic .ck-ring-wrap{ flex-direction:column;}
}
@media (prefers-reduced-motion: reduce){.k12-topic,.k12-topic * ,.k12-topic *::before,.k12-topic *::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.k12-topic .reveal,.k12-topic .anim-in{opacity:1!important;transform:none!important}}