/* 官网 aiwhy100.com:沿用设计交接包 brand.css 的 tokens 与「官网落地页.html」的布局。字体全部自托管(大陆访问不了 Google Fonts) */
@font-face{font-family:"Baloo 2";font-weight:600;font-display:swap;src:url(/site/fonts/Baloo2-SemiBold.woff2?v=a14537fefc) format("woff2")}
@font-face{font-family:"Baloo 2";font-weight:700;font-display:swap;src:url(/site/fonts/Baloo2-Bold.woff2?v=5d88e20450) format("woff2")}
@font-face{font-family:"Baloo 2";font-weight:800;font-display:swap;src:url(/site/fonts/Baloo2-ExtraBold.woff2?v=e53fa0759c) format("woff2")}
/* Noto Sans SC:只含页面用到的字(scripts 生成),缺字回退苹方 / 微软雅黑 */
@font-face{font-family:"Noto Sans SC Site";font-weight:400;font-display:swap;src:url(/site/fonts/NotoSansSC-Regular.woff2?v=668bc281b7) format("woff2")}
@font-face{font-family:"Noto Sans SC Site";font-weight:700;font-display:swap;src:url(/site/fonts/NotoSansSC-Bold.woff2?v=2f8cb76016) format("woff2")}
@font-face{font-family:"Noto Sans SC Site";font-weight:900;font-display:swap;src:url(/site/fonts/NotoSansSC-Heavy.woff2?v=6b97946e83) format("woff2")}

:root{
  --sun:#FFB300;--sun-deep:#E39A00;--sun-soft:#FFE9A8;--sun-wash:#FFF5D6;
  --ink:#1F2933;--ink-2:#52606D;--ink-3:#8A94A0;
  --paper:#FFFCF5;--card:#FFFFFF;--line:#EFE8D8;--line-2:#E2D9C4;
  --sky:#DDEFFB;--leaf:#DDF3E2;--coral:#FBE2D9;--grape:#EDE3F7;
  --leaf-ink:#23693F;--coral-ink:#B33F25;
  --f-cn:"Noto Sans SC Site","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-num:"Baloo 2","Noto Sans SC Site","PingFang SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-cn);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--sun);text-underline-offset:3px}
a:hover{color:var(--sun-deep)}
.num{font-family:var(--f-num);font-weight:800}
.w{max-width:1160px;margin:0 auto;padding:0 28px}
.muted{font-size:15px;color:var(--ink-2)}
.big{font-size:20px;color:var(--ink)}

/* 按钮:实体厚度风格 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:700;text-decoration:none;transition:transform .08s,box-shadow .08s;white-space:nowrap}
.btn-primary{background:var(--sun);color:var(--ink);box-shadow:0 4px 0 var(--sun-deep);min-height:56px;font-size:18px;padding:0 24px}
.btn-primary:active{transform:translateY(3px);box-shadow:0 1px 0 var(--sun-deep)}
.btn-dark{background:var(--ink);color:#fff;box-shadow:0 4px 0 #0d1318;min-height:56px;font-size:18px;padding:0 24px}
.btn-dark:hover{color:#fff}
.btn-dark:active{transform:translateY(3px);box-shadow:0 1px 0 #0d1318}
.btn-sm{min-height:44px;font-size:15px;padding:0 18px}
/* 上架前:按钮位置与样式同设计稿,不可点 */
.btn.soon{cursor:default}
.btn.soon:active{transform:none}
.btn-primary.soon:active{box-shadow:0 4px 0 var(--sun-deep)}
.btn-dark.soon:active{box-shadow:0 4px 0 #0d1318}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,252,245,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .w{display:flex;align-items:center;gap:28px;height:68px}
.nav nav{display:flex;gap:22px;margin-left:auto;font-size:15px;font-weight:500}
.nav nav a{text-decoration:none;color:var(--ink-2)}
.nav nav a:hover{color:var(--ink)}
/* 标志的头占下方 61%(上方是问号天线):文字对齐头部而不是整个标志,行高 = 头部高度、底对齐 */
.mark{display:flex;align-items:flex-end;gap:8px;text-decoration:none}
.mark img{width:40px;height:40px}
.mark b{font-weight:900;font-size:18px;line-height:24px;letter-spacing:.2px;white-space:nowrap}
.mark b .num{font-size:18.7px}
.mark.sm img{width:32px;height:32px}
.mark.sm b{font-size:15px;line-height:20px}
.mark.sm b .num{font-size:15.6px}

/* 标题 */
.h1{font-weight:900;font-size:clamp(40px,6vw,76px);line-height:1.18;letter-spacing:-.03em;margin:0;text-wrap:balance}
.h2{font-weight:900;font-size:clamp(30px,3.6vw,46px);line-height:1.15;letter-spacing:-.025em;margin:0;text-wrap:balance}
.p{font-size:clamp(17px,1.5vw,19px);line-height:1.7;color:var(--ink-2);margin:0;text-wrap:pretty}
.p.sm{font-size:16px}
.nw{white-space:nowrap;display:inline-block}
.hl{background:linear-gradient(transparent 58%,var(--sun) 58%,var(--sun) 92%,transparent 92%)}
.pill{align-self:flex-start;font-size:14px;font-weight:700;padding:6px 12px;border-radius:99px;background:var(--sun-wash);box-shadow:inset 0 0 0 1.5px var(--sun-soft)}

/* 首屏 */
.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:40px;align-items:center;padding-block:64px 40px;overflow:hidden}
.hero-copy{display:flex;flex-direction:column;gap:24px}
.hero-copy .p{max-width:480px}
.hero-cta{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.hero-art{position:relative;width:420px;max-width:100%;height:640px;justify-self:end}
.hero-blob{position:absolute;inset:8% -6% 0;border-radius:50%;background:var(--sun-soft)}
.phone{border-radius:44px;border:7px solid var(--ink);background:#fff;box-shadow:0 30px 40px rgba(31,41,51,.2)}
.hero-art .phone{position:absolute;left:50%;top:20px;width:290px;margin-left:-145px}
.bubble{position:absolute;background:var(--bg);border:2px solid var(--ink);border-radius:18px;padding:8px 13px;font-weight:700;font-size:15px;transform:rotate(var(--r));white-space:nowrap}
.hero-bot{position:absolute;left:-10px;bottom:10px;width:132px}

/* 区块 */
.sec{padding:96px 0}
.sec.white{background:#fff}
.sec.dark{background:var(--ink);color:#fff}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap}

.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:44px}
.step{background:#fff;border-radius:32px;box-shadow:inset 0 0 0 1.5px var(--line);padding:28px;display:flex;flex-direction:column;gap:12px}
.step-art{height:180px;border-radius:24px;display:grid;place-items:center;position:relative}
.step-art img{width:120px}
.step-art .num{position:absolute;left:16px;top:12px;font-size:28px}
.step-t{font-size:22px;margin-top:6px}

.vids{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:20px;margin-top:40px;max-width:calc(var(--cols,4) * 290px)}
.vids figure{margin:0;display:flex;flex-direction:column;gap:10px}
.vid{all:unset;position:relative;display:block;border-radius:18px;box-shadow:0 0 0 1.5px var(--line-2);overflow:hidden}
.vid img{width:100%;aspect-ratio:3/4;object-fit:cover}
.vid:not(:disabled){cursor:pointer}
.vid:focus-visible{outline:3px solid var(--sun-deep);outline-offset:3px}
/* 播放按钮:接口返回链接后才显示 */
.play{position:absolute;left:50%;top:50%;width:64px;height:64px;margin:-32px 0 0 -32px;border-radius:50%;background:var(--sun);box-shadow:0 4px 0 var(--sun-deep);display:none}
.play::after{content:"";position:absolute;left:25px;top:20px;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent var(--ink)}
.vid:not(:disabled) .play{display:block}
.vid:not(:disabled):hover .play{transform:scale(1.06)}
.vids figcaption{font-size:15px;font-weight:700;line-height:1.4}

.player{border:0;padding:0;background:transparent;max-width:min(420px,92vw);width:100%;overflow:visible}
.player::backdrop{background:rgba(31,41,51,.82)}
.player video{display:block;width:100%;max-height:82vh;aspect-ratio:9/16;background:#000;border-radius:20px}
.player-q{margin:12px 0 0;color:#fff;font-weight:700;font-size:16px;text-align:center}
.player-x{position:absolute;right:-6px;top:-50px;width:40px;height:40px;border:0;border-radius:50%;background:#fff;color:var(--ink);font:700 26px/1 var(--f-num);cursor:pointer}

.par{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.par-list{display:flex;flex-direction:column;gap:30px}
.par-item{display:flex;gap:16px}
.par-item b{font-size:20px}
.par-item p{margin:4px 0 0;font-size:16px;line-height:1.65;color:rgba(255,255,255,.78)}
.ic{width:48px;height:48px;border-radius:16px;background:var(--sun);display:grid;place-items:center;flex-shrink:0}
.ic svg{width:24px;height:24px;fill:none;stroke:var(--ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.par-phone{justify-self:center;width:280px;border-color:#0d1318;box-shadow:0 30px 60px rgba(0,0,0,.35)}

.badge{display:inline-block;vertical-align:middle;font-size:14px;font-weight:900;letter-spacing:0;padding:3px 12px;border-radius:99px;background:var(--coral-ink);color:#fff}
#price .p{margin-top:12px}
.packs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-top:40px}
.pack{background:#fff;border-radius:26px;box-shadow:inset 0 0 0 1.5px var(--line);padding:22px 18px;display:flex;flex-direction:column;gap:6px;position:relative}
.pack.first{background:var(--sun-wash)}
.pack.hot{box-shadow:inset 0 0 0 3px var(--ink)}
.tag{position:absolute;top:-11px;left:18px;font-size:12px;font-weight:900;padding:3px 10px;border-radius:99px;color:#fff}
.pk-n{font-size:15px;font-weight:700;color:var(--ink-2)}
.pk-p .num{font-size:44px;line-height:1.05}
.pk-s{font-size:14px;color:var(--ink-2)}
.pk-was{font-size:13px;color:var(--ink-3)}
.note{margin-top:20px !important;color:var(--ink-3)}

.faq{max-width:780px}
.faq .h2{margin-bottom:24px}
.faq details{border-top:1.5px solid var(--line);padding:20px 0}
.faq summary{cursor:pointer;font-weight:700;font-size:19px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-num);font-size:26px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:10px 0 0;font-size:16px;line-height:1.7;color:var(--ink-2)}

.cta{background:var(--sun);padding:72px 0}
.cta-in{display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.cta-in>img{width:164px}
.cta-copy{flex:1;min-width:260px;display:flex;flex-direction:column;gap:18px;align-items:flex-start}
.cta .p{color:var(--ink)}
.qr{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--ink-2)}
.qr-box{width:120px;height:120px;border-radius:12px;background:#fff;padding:8px}
.qr-box svg{width:100%;height:100%;display:block}
.qr-soon{display:grid;place-items:center}

/* 关注我们:社媒二维码(有图才显示) */
.follow{display:flex;align-items:flex-start;gap:28px;padding-top:40px;padding-bottom:12px;flex-wrap:wrap}
.follow-t{font-size:16px;font-weight:900;padding-top:4px;min-width:72px}
.socs{display:flex;gap:22px;flex-wrap:wrap}
.soc{margin:0;display:flex;flex-direction:column;align-items:center;gap:6px;width:112px}
.soc img{width:96px;height:96px;border-radius:12px;background:#fff;padding:6px;box-shadow:inset 0 0 0 1.5px var(--line)}
.soc figcaption{display:flex;flex-direction:column;align-items:center;font-size:12px;color:var(--ink-3)}
.soc figcaption b{font-size:14px;color:var(--ink)}
.foot{padding:32px 28px 48px;display:flex;gap:20px;flex-wrap:wrap;align-items:center;font-size:14px;color:var(--ink-2)}
.foot .grow{flex:1}

@media (max-width:900px){
  .hero,.par{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .packs{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav nav{display:none}
  .nav .btn{margin-left:auto}
  .hero-art{justify-self:center}
  .sec{padding:72px 0}
}
@media (max-width:520px){
  .w{padding:0 18px}
  .hero{padding-block:40px 24px}
  .hero-art{height:560px;width:340px}
  .hero-art .phone{width:250px;margin-left:-125px}
  .bubble{font-size:13px;padding:6px 10px}
  .vids{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pk-p .num{font-size:36px}
  .hero-art .bubble:first-of-type{left:0 !important}
  .cta-in>img{width:110px}
  .qr{display:none}
  .follow{gap:14px}
  .socs{gap:12px}
  .soc{width:96px}
  .soc img{width:84px;height:84px}
}