/* 洋格教育软件平台 · 晴空良狮（令牌同洋格问学 07-v8-交互说明.md §一） */
:root{
  --brand:#2E7BE6; --brand-press:#1F63C4; --brand-soft:#EAF3FE;
  --sun:#F7C548; --sun-soft:#FFF6DC; --sun-ink:#5A3E00;
  --bg:#F4F8FD; --card:#FFFFFF; --line:#E6EEF8; --line2:#D3DDEA;
  --ink:#17223B; --ink-2:#4A5670; --ink-3:#8A94A8;
  --shadow:0 4px 12px rgba(46,123,230,.08);
  --shadow-lg:0 12px 32px rgba(46,123,230,.12);
  --r:16px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font:16px/1.75 var(--font);color:var(--ink-2);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--brand);text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3{color:var(--ink);line-height:1.3;font-weight:700}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
:focus-visible{outline:3px solid rgba(46,123,230,.45);outline-offset:3px;border-radius:8px}

/* 顶栏 */
.hd{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hd .wrap{display:flex;align-items:center;height:64px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:16px;white-space:nowrap}
.brand img{width:36px;height:36px;border-radius:50%}
.brand .tag{font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:2px 8px;border-radius:999px}
.nav{display:flex;gap:4px;margin-left:auto;list-style:none}
.nav a{display:block;padding:8px 14px;border-radius:999px;font-size:14px;color:var(--ink-2);font-weight:500}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:0;background:none;color:var(--ink);border-radius:12px;cursor:pointer}

/* 头图 */
.hero{position:relative;background:#5AA6F2 right 30%/cover no-repeat;color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(30,95,190,.55) 0%,rgba(46,123,230,.25) 42%,rgba(46,123,230,0) 62%)}
.hero .wrap{position:relative;min-height:600px;display:flex;flex-direction:column;justify-content:center;padding-top:48px;padding-bottom:96px}
.hero .chip{align-self:flex-start;font-size:13px;font-weight:600;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.35);padding:4px 12px;border-radius:999px;margin-bottom:20px}
.hero h1{color:#fff;font-size:44px;font-weight:800;letter-spacing:.01em;margin-bottom:16px;text-shadow:0 2px 12px rgba(20,70,150,.25)}
.hero p{font-size:18px;max-width:26em;color:rgba(255,255,255,.95);text-shadow:0 1px 8px rgba(20,70,150,.25)}
.hero .acts{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.hero-img-m{display:none}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:48px;padding:0 28px;border-radius:999px;font-size:16px;font-weight:700;transition:transform .15s,background .15s,box-shadow .15s;cursor:pointer;border:0}
.btn:hover{transform:translateY(-1px)}
.btn.sun{background:var(--sun);color:var(--sun-ink);box-shadow:0 6px 16px rgba(247,197,72,.35)}
.btn.sun:hover{background:#F9CF5E}
.btn.glass{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn.glass:hover{background:rgba(255,255,255,.28)}
.btn.brand{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(46,123,230,.28)}
.btn.brand:hover{background:var(--brand-press)}
.btn.white{background:#fff;color:var(--brand)}

/* 三条承诺：压在头图下沿 */
.trust{position:relative;z-index:2;margin-top:-56px}
.trust .row{display:grid;grid-template-columns:repeat(3,1fr);background:var(--card);border-radius:20px;box-shadow:var(--shadow-lg)}
.trust .it{padding:24px 28px;display:flex;gap:14px;align-items:center}
.trust .it + .it{border-left:1px solid var(--line)}
.trust .ic{flex:none;width:44px;height:44px;border-radius:14px;background:var(--brand-soft);display:grid;place-items:center;color:var(--brand)}
.trust b{display:block;color:var(--ink);font-size:16px;line-height:1.4}
.trust span{font-size:14px;color:var(--ink-3)}

/* 区块 */
.sec{padding:72px 0 0}
.sec.tight{padding-top:72px}
.sec-h{text-align:center;margin-bottom:44px}
.sec-h .eb{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:3px 12px;border-radius:999px;margin-bottom:12px}
.sec-h h2{font-size:30px}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow)}

/* 服务内容 */
.svc{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.svc .card{padding:28px 24px 26px;transition:transform .2s,box-shadow .2s}
.svc .card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.svc img{width:72px;height:72px;margin-bottom:16px}
.svc h3{font-size:18px;margin-bottom:8px}
.svc p{font-size:14px;line-height:1.7;color:var(--ink-2)}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:st;position:relative}
.flow::before{content:"";position:absolute;top:22px;left:10%;right:10%;height:2px;background:repeating-linear-gradient(90deg,var(--line2) 0 8px,transparent 8px 14px)}
.flow .st{position:relative;text-align:center;padding:0 8px}
.flow .n{counter-increment:st;width:44px;height:44px;margin:0 auto 16px;border-radius:50%;background:var(--card);border:2px solid var(--brand);color:var(--brand);font-weight:800;font-size:18px;display:grid;place-items:center;box-shadow:0 0 0 6px var(--bg)}
.flow .n::before{content:counter(st)}
.flow .st:last-child .n{background:var(--brand);color:#fff}
.flow h3{font-size:16px;margin-bottom:6px}
.flow p{font-size:14px;color:var(--ink-3);line-height:1.65}

/* 自营产品 */
.prod{display:grid;grid-template-columns:280px 1fr;align-items:center;gap:40px;padding:36px 48px;background:linear-gradient(135deg,#FFFFFF 0%,#EAF3FE 100%);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.prod img{width:260px;height:260px;margin:-12px 0 -24px}
.prod .eb{font-size:13px;font-weight:600;color:var(--sun-ink);background:var(--sun-soft);padding:3px 12px;border-radius:999px}
.prod h2{font-size:30px;margin:14px 0 10px}
.prod p{font-size:16px;max-width:30em}
.prod .tags{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.prod .tags span{font-size:14px;color:var(--brand);background:#fff;border:1px solid var(--line);padding:4px 14px;border-radius:999px}

/* 资质 */
.about{display:grid;grid-template-columns:1fr;gap:16px}
.kv{display:grid;grid-template-columns:136px 1fr;padding:8px 28px}
.kv.two{grid-template-columns:136px 1fr 136px 1fr;column-gap:0}
.kv.two div:nth-child(4n+3){padding-left:32px;border-left:1px solid var(--line)}
.kv.two div:nth-last-child(-n+4){border-bottom:0}
.kv div{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
.kv div:nth-child(odd){color:var(--ink-3)}
.kv div:nth-child(even){color:var(--ink);font-weight:600}
.kv div:nth-last-child(-n+2){border-bottom:0}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}
.pill{display:inline-block;font-size:13px;font-weight:600;color:#1C7C4E;background:#E3F6EC;padding:2px 10px;border-radius:999px}
.guard{padding:20px 28px;display:flex;flex-direction:column;gap:6px;background:var(--sun-soft);box-shadow:none;border:1px solid #F3E3B0}
.guard h3{font-size:18px;display:flex;align-items:center;gap:8px;color:var(--sun-ink)}
.guard p{font-size:15px;color:#6B5418;line-height:1.8}
.guard b{color:var(--sun-ink)}

/* 合作 */
.join{position:relative;display:flex;align-items:center;gap:32px;padding:44px 56px;border-radius:24px;color:#fff;background:radial-gradient(120% 140% at 85% 10%,#5AA0F2,#2E7BE6 55%,#2A6FD4);overflow:hidden}
.join h2{color:#fff;font-size:28px;margin-bottom:8px}
.join p{color:rgba(255,255,255,.9);font-size:16px}
.join .txt{flex:1}
.join img{width:200px;height:200px;margin:-40px 0 -56px;flex:none}

/* 页脚 */
.ft{margin-top:80px;background:#17223B;color:rgba(255,255,255,.62);font-size:14px}
.ft .wrap{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px;padding-top:48px;padding-bottom:36px}
.ft .brand{color:#fff;margin-bottom:12px}
.ft h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
.ft ul{list-style:none;display:grid;gap:8px}
.ft a{color:rgba(255,255,255,.72)}
.ft a:hover{color:#fff}
.ft .bot{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:13px}

@media (max-width:960px){
  .svc{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr;gap:0;max-width:440px;margin:0 auto}
  .flow::before{top:22px;bottom:22px;left:21px;right:auto;width:2px;height:auto;background:repeating-linear-gradient(180deg,var(--line2) 0 8px,transparent 8px 14px)}
  .flow .st{display:grid;grid-template-columns:44px 1fr;column-gap:16px;text-align:left;padding:0 0 24px}
  .flow .n{margin:0;grid-row:span 2}
  .flow h3{margin:8px 0 2px}
  .prod{grid-template-columns:1fr;text-align:center;padding:32px 24px 36px;gap:0}
  .prod img{margin:-16px auto 8px;width:200px;height:200px}
  .prod p{margin:0 auto}
  .prod .tags{justify-content:center}
}
@media (max-width:760px){
  .wrap{padding:0 16px}
  .hd .wrap{height:56px}
  .brand .tag{display:none}
  .burger{display:grid;place-items:center}
  .nav{display:none;position:absolute;top:56px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px 16px;box-shadow:var(--shadow-lg)}
  .nav.open{display:flex}
  .nav a{padding:12px 14px;font-size:16px}
  .hero{background-image:radial-gradient(120% 90% at 85% 10%,#5AA0F2,#2E7BE6 55%,#2A6FD4)!important}
  .hero::before{display:none}
  .hero .wrap{min-height:0;padding-top:36px;padding-bottom:0}
  .hero h1{font-size:28px}
  .hero p{font-size:16px}
  .hero .acts{margin-top:24px}
  .hero .acts .btn{flex:1;padding:0 16px}
  .hero-img-m{display:block;margin:20px -16px 0;width:calc(100% + 32px);max-width:none;aspect-ratio:900/740;object-fit:cover}
  .trust{margin-top:-28px}
  .trust .row{grid-template-columns:1fr}
  .trust .it{padding:16px 20px}
  .trust .it + .it{border-left:0;border-top:1px solid var(--line)}
  .sec{padding:48px 0 0}
  .sec.tight{padding-top:48px}
  .sec-h{margin-bottom:28px}
  .sec-h h2,.prod h2{font-size:24px}
  .svc{grid-template-columns:1fr;gap:12px}
  .svc .card{display:grid;grid-template-columns:56px 1fr;column-gap:16px;padding:20px}
  .svc img{width:56px;height:56px;margin:0;grid-row:span 2}
  .svc h3{font-size:16px;margin-bottom:2px}
  .kv,.kv.two{grid-template-columns:104px 1fr;padding:4px 20px}
  .kv.two div:nth-child(4n+3){padding-left:0;border-left:0}
  .kv.two div:nth-last-child(-n+4){border-bottom:1px solid var(--line)}
  .kv.two div:nth-last-child(-n+2){border-bottom:0}
  .kv div{font-size:14px;padding:12px 0}
  .guard{padding:20px}
  .join{flex-direction:column;align-items:flex-start;padding:32px 24px 0;gap:16px}
  .join h2{font-size:22px}
  .join .btn{width:100%}
  .join img{align-self:center;width:160px;height:160px;margin:0 0 -8px}
  .ft{margin-top:56px}
  .ft .wrap{grid-template-columns:1fr 1fr;gap:24px}
  .ft .wrap > :first-child{grid-column:1/-1}
}