/* =====================================================================
   WP源码课堂 · 设计系统（Apple 风格）
   黑白灰 + 单一蓝色点缀 · 大字号紧字距 · 药丸按钮 · 大圆角 · 充足留白
   ===================================================================== */
:root{
  /* Apple 调色板 */
  --blue:#0071e3; --blue-hover:#0077ed; --blue-press:#006edb; --blue-link:#2997ff;
  --ink:#1d1d1f; --gray:#86868b; --gray-2:#6e6e73; --faint:#aeaeb2;
  --white:#ffffff; --bg-gray:#f5f5f7; --bg-gray-2:#fafafa;
  --line:#d2d2d7; --line-soft:#e8e8ed;
  /* 语义化（供深色模式翻转） */
  --page:#ffffff;            /* 页面底色 */
  --solid:#1d1d1f; --solid-ink:#ffffff;   /* 实心徽标/序号圈：深色模式会反相 */
  --panel:#1d1d1f;           /* CTA 大面板（始终深） */
  --bar-bg:rgba(255,255,255,.72); --bar-line:rgba(0,0,0,.08);  /* 磨砂导航 */
  /* 代码区（Xcode Dark 风格） */
  --code-bg:#1d1d1f; --code-bg-2:#2a2a2c; --code-ink:#e8e8ed;
  --c-key:#fc5fa3; --c-str:#fc6a5d; --c-com:#7e8a9a; --c-fn:#67d4b6; --c-num:#d0a8ff;
  /* 圆角 */
  --r:12px; --r-lg:18px; --r-xl:28px; --pill:980px;
  /* 阴影（Apple 偏轻） */
  --sh-sm:0 1px 3px rgba(0,0,0,.06); --sh:0 4px 20px rgba(0,0,0,.08); --sh-lg:0 16px 50px rgba(0,0,0,.14);
}

/* ============ 深色模式 ============ */
[data-theme="dark"]{
  --ink:#f5f5f7; --gray:#86868b; --gray-2:#a1a1a6; --faint:#6e6e73;
  --page:#000000; --white:#1c1c1e; --bg-gray:#161618; --bg-gray-2:#1c1c1e;
  --line:#38383a; --line-soft:#2a2a2c;
  --blue:#0a84ff; --blue-hover:#409cff; --blue-press:#0a84ff; --blue-link:#409cff;
  --code-bg:#161618; --code-bg-2:#2a2a2c;
  --solid:#f5f5f7; --solid-ink:#000000;
  --panel:#1c1c1e;
  --bar-bg:rgba(0,0,0,.7); --bar-line:rgba(255,255,255,.1);
  --sh-sm:0 1px 3px rgba(0,0,0,.4); --sh:0 4px 20px rgba(0,0,0,.5); --sh-lg:0 16px 50px rgba(0,0,0,.6);
}
html{background:var(--page);}
body,.lp-nav,.topbar,.side,.section.alt,.block,.codewrap,.card,.price,.stepcard,.fcard,.glosspop{transition:background .3s ease,border-color .3s ease,color .3s ease;}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--page);color:var(--ink);
  font-family:"MiSans",-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI","PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  line-height:1.47;font-size:17px;letter-spacing:-.005em;
}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}
code{font-family:"SF Mono",ui-monospace,SFMono-Regular,"Cascadia Mono","Cascadia Code",Menlo,Consolas,monospace;font-size:.875em;
  background:var(--bg-gray);color:var(--ink);padding:1.5px 6px;border-radius:6px;letter-spacing:0;word-break:break-word;}
::selection{background:rgba(0,113,227,.18);}

/* ============ 按钮（药丸） ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;cursor:pointer;
  font-family:inherit;font-size:17px;font-weight:400;letter-spacing:-.01em;
  padding:11px 22px;border-radius:var(--pill);transition:.25s;text-decoration:none;line-height:1.2;}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-hover);transform:scale(1.02);}
.btn-primary:active{background:var(--blue-press);transform:scale(.99);}
.btn-ghost{background:transparent;color:var(--blue);border:1px solid var(--blue);}
.btn-ghost:hover{background:var(--blue);color:#fff;}

/* =====================================================================
   落地页 index.html
   ===================================================================== */
.lp-nav{position:sticky;top:0;z-index:50;background:var(--bar-bg);
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--bar-line);}
.lp-nav-in{max-width:1024px;margin:0 auto;padding:0 22px;height:52px;display:flex;align-items:center;gap:22px;}
.brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:18px;color:var(--ink);letter-spacing:-.02em;}
.brand:hover{text-decoration:none;}
.brand .logo{width:30px;height:30px;border-radius:8px;background:var(--solid);
  display:grid;place-items:center;color:var(--solid-ink);font-size:16px;font-weight:600;}
.lp-nav .spacer{flex:1;}
.lp-nav a.navlink{color:var(--ink);font-weight:400;font-size:13px;letter-spacing:-.01em;opacity:.85;}
.lp-nav a.navlink:hover{opacity:1;text-decoration:none;}

.hero{max-width:980px;margin:0 auto;padding:80px 22px 20px;text-align:center;}
.hero .eyebrow{display:inline-block;color:var(--blue);font-weight:600;font-size:21px;letter-spacing:-.01em;margin-bottom:6px;}
.hero h1{font-size:72px;line-height:1.05;margin:6px 0 0;letter-spacing:-.025em;font-weight:600;}
.hero h1 .grad{background:linear-gradient(90deg,#bf5af2,#0071e3 55%,#2997ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.sub{font-size:25px;line-height:1.35;color:var(--gray-2);max-width:660px;margin:22px auto 0;font-weight:400;letter-spacing:-.01em;}
.hero .cta{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;margin-top:30px;}
.hero .cta .btn{font-size:19px;padding:12px 26px;}
.hero .trust{margin-top:20px;color:var(--gray);font-size:14px;letter-spacing:-.01em;}

.hero-art{max-width:840px;margin:54px auto 0;background:var(--code-bg);border-radius:var(--r-xl);
  box-shadow:var(--sh-lg);overflow:hidden;text-align:left;}
.hero-art .bar{display:flex;align-items:center;gap:8px;padding:15px 18px;background:#2a2a2c;}
.hero-art .bar i{width:12px;height:12px;border-radius:50%;display:inline-block;}
.hero-art .bar .t{margin-left:10px;color:#86868b;font-size:13px;font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;}
.hero-art pre{margin:0;padding:26px 24px;color:var(--code-ink);font-size:14px;line-height:1.85;overflow-x:auto;
  font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;letter-spacing:0;}

.section{max-width:1024px;margin:0 auto;padding:100px 22px;}
.section.alt{max-width:none;background:var(--bg-gray);}
.section.alt > *{max-width:1024px;margin-left:auto;margin-right:auto;}
.section h2{font-size:48px;text-align:center;margin:0 0 14px;letter-spacing:-.02em;font-weight:600;line-height:1.08;}
.section .lead{text-align:center;color:var(--gray-2);font-size:21px;max-width:640px;margin:0 auto 56px;font-weight:400;letter-spacing:-.01em;}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{background:var(--bg-gray);border-radius:var(--r-xl);padding:34px 30px;transition:.3s;}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh);}
.card .ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:28px;margin-bottom:20px;
  background:var(--white);box-shadow:var(--sh-sm);}
.card h3{margin:0 0 8px;font-size:22px;font-weight:600;letter-spacing:-.01em;}
.card p{margin:0;color:var(--gray-2);font-size:16px;line-height:1.5;letter-spacing:-.01em;}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stepcard{background:var(--white);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:26px 22px;transition:.3s;}
.stepcard:hover{box-shadow:var(--sh);transform:translateY(-3px);}
.stepcard .n{width:36px;height:36px;border-radius:var(--pill);background:var(--solid);color:var(--solid-ink);font-weight:600;
  display:grid;place-items:center;font-size:17px;margin-bottom:16px;}
.stepcard h4{margin:0 0 7px;font-size:18px;font-weight:600;letter-spacing:-.01em;}
.stepcard p{margin:0;color:var(--gray-2);font-size:15px;letter-spacing:-.01em;}

.cta-band{background:var(--panel);border-radius:var(--r-xl);padding:80px 32px;text-align:center;color:#fff;}
.cta-band h2{color:#fff;font-size:40px;margin:0 0 14px;letter-spacing:-.02em;font-weight:600;}
.cta-band p{color:#a1a1a6;font-size:21px;margin:0 0 32px;letter-spacing:-.01em;}
.cta-band .btn-primary{background:var(--blue);}
.cta-band .btn-primary:hover{background:var(--blue-hover);}

.price-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch;}
.price{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);padding:36px 30px;display:flex;flex-direction:column;transition:.3s;}
.price:hover{box-shadow:var(--sh);}
.price.feat{border:2px solid var(--blue);position:relative;}
.price.feat .tag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--blue);color:#fff;
  font-size:12px;font-weight:600;padding:5px 16px;border-radius:var(--pill);letter-spacing:.01em;}
.price h3{margin:0 0 4px;font-size:22px;font-weight:600;letter-spacing:-.01em;}
.price .amt{font-size:44px;font-weight:600;margin:10px 0 4px;letter-spacing:-.02em;}
.price .amt small{font-size:16px;font-weight:400;color:var(--gray);letter-spacing:-.01em;}
.price ul{list-style:none;padding:0;margin:22px 0 26px;flex:1;}
.price li{padding:8px 0 8px 28px;position:relative;color:var(--gray-2);font-size:15px;letter-spacing:-.01em;}
.price li::before{content:"";position:absolute;left:2px;top:13px;width:6px;height:11px;
  border:solid var(--blue);border-width:0 2px 2px 0;transform:rotate(45deg);}
.price .btn{width:100%;}

.lp-foot{border-top:1px solid var(--line-soft);background:var(--bg-gray);}
.lp-foot-in{max-width:1024px;margin:0 auto;padding:34px 22px;color:var(--gray);font-size:13px;text-align:center;line-height:1.6;}

/* =====================================================================
   学习应用 learn.html
   ===================================================================== */
.app{display:grid;grid-template-columns:300px 1fr;min-height:100vh;}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:40;grid-column:1/3;height:52px;
  background:var(--bar-bg);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--bar-line);display:flex;align-items:center;gap:16px;padding:0 20px;}
.topbar .brand{font-size:16px;}
.topbar .brand .logo{width:28px;height:28px;font-size:15px;}
.topbar .spacer{flex:1;}
.menu-btn{display:none;background:transparent;border:0;font-size:22px;cursor:pointer;color:var(--ink);
  width:40px;height:40px;align-items:center;justify-content:center;border-radius:8px;}
.menu-btn:hover{background:var(--bg-gray);}
.search{position:relative;}
.search input{border:1px solid var(--line);background:var(--bg-gray);border-radius:var(--pill);padding:8px 14px 8px 34px;
  font-size:14px;width:210px;font-family:inherit;outline:none;transition:.2s;color:var(--ink);letter-spacing:-.01em;}
.search input::placeholder{color:var(--faint);}
.search input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,113,227,.12);width:240px;}
.search .si{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--faint);font-size:13px;}
.prog{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--gray);font-weight:400;letter-spacing:-.01em;}
.prog .track{width:96px;height:6px;background:var(--line-soft);border-radius:var(--pill);overflow:hidden;}
.prog .fill{height:100%;background:var(--blue);width:0;border-radius:var(--pill);transition:.5s;}

/* 侧栏 */
.side{position:sticky;top:52px;align-self:start;height:calc(100vh - 52px);overflow-y:auto;
  background:var(--bg-gray);border-right:1px solid var(--line-soft);padding:18px 14px;}
.side .grp{font-size:11px;font-weight:600;letter-spacing:.06em;color:var(--gray);text-transform:uppercase;padding:14px 12px 7px;}
.navi{display:flex;align-items:flex-start;gap:11px;padding:10px 12px;border-radius:10px;cursor:pointer;
  color:var(--ink);transition:.15s;margin-bottom:1px;}
.navi:hover{background:rgba(0,0,0,.04);}
.navi.active{background:var(--white);box-shadow:var(--sh-sm);}
.navi.active .nt{color:var(--blue);font-weight:600;}
.navi .nic{font-size:18px;line-height:1.4;flex:none;}
.navi .meta{flex:1;min-width:0;}
.navi .nt{display:block;font-size:14.5px;font-weight:500;color:var(--ink);line-height:1.35;letter-spacing:-.01em;}
.navi .nf{display:block;font-size:12px;color:var(--gray);font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;margin-top:3px;letter-spacing:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.navi .done{color:var(--blue);font-size:14px;flex:none;font-weight:700;}
.navi.hidden{display:none;}

/* 主内容 */
.main{padding:40px clamp(20px,5vw,64px) 90px;max-width:920px;}
.crumbs{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:14px;color:var(--gray);margin-bottom:16px;min-height:20px;letter-spacing:-.01em;}
.crumbs .cb{color:var(--blue);cursor:pointer;}
.crumbs .cb:hover{text-decoration:underline;}
.crumbs .sep{color:var(--faint);}
.crumbs .cur{color:var(--gray-2);}

.backbar{display:flex;align-items:center;gap:10px;margin-bottom:22px;flex-wrap:wrap;}
.backbtn{display:inline-flex;align-items:center;gap:5px;background:transparent;border:0;
  padding:0;font-size:17px;font-weight:400;color:var(--blue);cursor:pointer;transition:.2s;letter-spacing:-.01em;font-family:inherit;}
.backbtn:hover{opacity:.7;}
.backbtn.hide{display:none;}

.lhead{display:flex;align-items:flex-start;gap:20px;margin-bottom:6px;}
.lhead .lic{width:68px;height:68px;border-radius:18px;background:var(--bg-gray);
  display:grid;place-items:center;font-size:34px;flex:none;}
.lhead h1{font-size:40px;margin:4px 0 6px;letter-spacing:-.02em;font-weight:600;line-height:1.1;}
.lhead .sub{color:var(--gray-2);font-size:19px;margin:0;font-weight:400;letter-spacing:-.01em;}
.lhead .role{display:inline-block;margin-top:12px;background:var(--bg-gray);color:var(--gray-2);
  font-size:12.5px;font-weight:500;padding:4px 13px;border-radius:var(--pill);letter-spacing:-.01em;}
.filepath{font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;font-size:12.5px;color:var(--gray);background:var(--bg-gray);
  border-radius:8px;padding:7px 12px;display:inline-block;margin:18px 0 6px;letter-spacing:0;word-break:break-all;}
.intro{font-size:19px;color:var(--gray-2);line-height:1.55;margin:14px 0 8px;letter-spacing:-.01em;font-weight:400;}
.intro p{margin:14px 0;}
.intro b{color:var(--ink);font-weight:600;}

/* 代码 + 解释 块 */
.block{margin:30px 0;border-radius:var(--r-lg);overflow:hidden;background:var(--white);box-shadow:var(--sh-sm);border:1px solid var(--line-soft);}
.codewrap{background:var(--code-bg);position:relative;}
.codebar{display:flex;align-items:center;justify-content:space-between;padding:9px 12px 9px 16px;
  background:var(--code-bg-2);border-bottom:1px solid rgba(255,255,255,.07);}
.codebar .lang{font-size:11px;font-weight:600;color:#9b9b9f;font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;letter-spacing:.1em;}
.copy-btn{display:inline-flex;align-items:center;gap:5px;background:rgba(255,255,255,.08);color:#e8e8ed;border:0;
  border-radius:7px;padding:5px 11px;font-size:12px;font-weight:500;cursor:pointer;font-family:inherit;transition:.18s;letter-spacing:-.01em;}
.copy-btn:hover{background:rgba(255,255,255,.16);}
.copy-btn.done{background:rgba(48,209,88,.22);color:#30d158;}
.codewrap pre{margin:0;padding:20px;overflow-x:auto;font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  font-size:13.5px;line-height:1.8;color:var(--code-ink);letter-spacing:0;-webkit-overflow-scrolling:touch;}

/* 主题切换按钮 */
.theme-toggle{background:transparent;border:0;cursor:pointer;width:36px;height:36px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;font-size:17px;color:var(--ink);transition:.2s;line-height:1;flex:none;}
.theme-toggle:hover{background:var(--bg-gray);}
.tok-key{color:var(--c-key);} .tok-str{color:var(--c-str);} .tok-com{color:var(--c-com);font-style:italic;}
.tok-fn{color:var(--c-fn);} .tok-num{color:var(--c-num);}
.explain{padding:20px 22px 22px;font-size:16.5px;line-height:1.7;color:var(--gray-2);background:var(--white);letter-spacing:-.003em;}
.explain b{color:var(--ink);font-weight:600;}
.explain u{text-decoration:none;border-bottom:1.5px dotted var(--blue);cursor:help;color:var(--blue);}
.explain code{font-size:.84em;background:var(--bg-gray);border:1px solid var(--line-soft);padding:1.5px 6px;color:var(--ink);}
.explain .ex-label{display:block;font-weight:600;color:var(--blue);font-size:12px;letter-spacing:.04em;margin:0 0 9px;}
.explain .ex-label::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--blue);margin-right:8px;vertical-align:middle;position:relative;top:-1px;}

/* 跨文件跳转链接（Apple 文字链接风格） */
.jumps{display:flex;flex-wrap:wrap;gap:18px;padding:0 22px 20px;}
.jump{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-size:16px;font-weight:400;cursor:pointer;transition:.2s;letter-spacing:-.01em;}
.jump:hover{opacity:.65;}
.jump .jf{font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;font-size:.92em;}
.jump .arr{color:var(--blue);}

/* 总结条 */
.takeaway{display:flex;gap:14px;background:var(--bg-gray);border-radius:var(--r-lg);padding:20px 22px;margin:30px 0;align-items:flex-start;}
.takeaway .ti{font-size:22px;flex:none;line-height:1.2;}
.takeaway .tc b{display:block;color:var(--gray);font-size:12px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:4px;font-weight:600;}
.takeaway .tc{font-size:17px;color:var(--ink);line-height:1.5;letter-spacing:-.01em;}

/* 上一课/下一课 */
.pager{display:flex;gap:14px;margin-top:44px;}
.pager .pg{flex:1;border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:16px 20px;cursor:pointer;
  background:var(--white);transition:.2s;min-width:0;}
.pager .pg:hover{box-shadow:var(--sh);transform:translateY(-2px);}
.pager .pg.next{text-align:right;}
.pager .pg .lbl{font-size:13px;color:var(--gray);letter-spacing:-.01em;}
.pager .pg .nm{font-weight:600;color:var(--blue);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;letter-spacing:-.01em;}
.pager .pg.empty{visibility:hidden;}

/* 旅程总览 */
.flowmap{display:flex;flex-direction:column;margin:24px 0;}
.flownode{display:flex;align-items:stretch;cursor:pointer;}
.flownode .rail{display:flex;flex-direction:column;align-items:center;width:48px;flex:none;}
.flownode .dot{width:40px;height:40px;border-radius:var(--pill);background:var(--solid);color:var(--solid-ink);font-weight:600;
  display:grid;place-items:center;font-size:17px;transition:.25s;}
.flownode .line{flex:1;width:2px;background:var(--line);min-height:16px;}
.flownode:last-child .line{display:none;}
.flownode .fcard{flex:1;background:var(--white);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:15px 18px;
  margin:0 0 16px 16px;transition:.25s;}
.flownode:hover .fcard{box-shadow:var(--sh);transform:translateX(4px);}
.flownode:hover .dot{background:var(--blue);color:#fff;transform:scale(1.06);}
.flownode .fcard .fl{font-weight:600;font-size:16px;color:var(--ink);font-family:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;letter-spacing:0;}
.flownode .fcard .fd{font-size:15px;color:var(--gray-2);margin-top:3px;letter-spacing:-.01em;}

/* 术语弹窗 */
.glosspop{position:fixed;z-index:90;max-width:300px;background:rgba(29,29,31,.92);backdrop-filter:blur(20px);
  color:#f5f5f7;font-size:14px;line-height:1.55;padding:14px 16px;border-radius:14px;box-shadow:var(--sh-lg);
  opacity:0;pointer-events:none;transform:translateY(6px) scale(.98);transition:.18s;letter-spacing:-.01em;}
.glosspop.show{opacity:1;transform:translateY(0) scale(1);}
.glosspop b{color:#fff;display:block;margin-bottom:5px;font-weight:600;}

/* 移动端遮罩 */
.scrim{display:none;position:fixed;inset:52px 0 0;background:rgba(0,0,0,.32);z-index:35;backdrop-filter:blur(2px);}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .grid,.price-wrap{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:52px;}
  .section h2{font-size:38px;}
}
@media(max-width:760px){
  body{font-size:16px;}
  .app{grid-template-columns:1fr;}
  .menu-btn{display:flex;}
  .search input{width:140px;} .search input:focus{width:160px;}
  .prog{display:none;}
  .side{position:fixed;top:52px;left:0;bottom:0;width:284px;z-index:36;transform:translateX(-100%);transition:.3s;box-shadow:var(--sh-lg);}
  .side.open{transform:translateX(0);}
  .scrim.open{display:block;}
  .main{padding:24px 20px 80px;}
  .hero{padding:48px 20px 16px;} .hero h1{font-size:40px;} .hero .eyebrow{font-size:18px;} .hero p.sub{font-size:19px;}
  .hero .cta .btn{font-size:17px;}
  .section{padding:64px 20px;} .section h2{font-size:30px;} .section .lead{font-size:18px;}
  .steps{grid-template-columns:1fr;}
  .cta-band{padding:56px 24px;} .cta-band h2{font-size:30px;}
  .lhead{gap:14px;} .lhead .lic{width:54px;height:54px;font-size:28px;} .lhead h1{font-size:30px;}
  .intro{font-size:17px;}
  .explain{font-size:16px;}
}