/* Zapthen 官网「台阶」系统（2026-10-20，Jiang 选定 K 版）
   图标里的玻璃球 = 一个选项；球沿斜线升高 = 下一步；球的大小 = 排序名次；光标 = 你。
   色只有一个底色家族（天空蓝）加石板、奶白；珊瑚只给球（第一个选项）。字永远是深石板蓝，不用黑。
   不用描边、不用硬阴影；字体走系统栈；只做浅色。设计稿与对比见 design/2026-10-20-官网重做/。 */
:root{
  --ink:#1B2335;--cream:#FBF6EE;--sky:#C4D8F0;--sky-soft:#DCE8F6;--slate:#2A3550;--coral:#F18E7C;--sub:rgba(27,35,53,.74);--rule:rgba(27,35,53,.2);
  --hero:linear-gradient(180deg,#D6E5F6,#B9D0EC);
  --m:clamp(20px,4vw,56px);
  --sans:"Helvetica Neue","PingFang SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,Arial,sans-serif;
  --mono:ui-monospace,Menlo,"SF Mono",monospace;
  color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--cream);color:var(--ink);font:400 17px/1.75 var(--sans);-webkit-font-smoothing:antialiased;overflow-wrap:anywhere}
a{color:inherit}
img{max-width:100%;height:auto}
.mono,.eyebrow{font:600 12px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase}
.wrap{max-width:1440px;margin:0 auto;padding:0 var(--m)}
.in{max-width:1240px;margin:0 auto;padding:0 clamp(24px,6vw,72px)}   /* 正文栏收窄并居中：两侧留白，不再贴边（首页「太满」反馈，2026-10-20） */
h1,h2{font-weight:500;letter-spacing:-.04em;text-wrap:balance;margin:0}
h3{font-weight:500;letter-spacing:-.02em;margin:0}

/* 导航 */
.nav{display:flex;flex-wrap:wrap;gap:8px 28px;align-items:center;justify-content:space-between;padding-top:22px;padding-bottom:22px}
.brand{display:flex;align-items:center;gap:12px;font-weight:600;font-size:20px;text-decoration:none;letter-spacing:-.01em}
.brand img{width:34px;height:34px;border-radius:9px;box-shadow:0 2px 6px rgba(27,35,53,.2)}
.nav-links{display:flex;flex-wrap:wrap;gap:6px 26px;align-items:center;font:600 12px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase}
.nav-links a{text-decoration:none;color:var(--sub)}
.nav-links a:hover,.nav-links a.on{color:var(--ink)}
.lang-sw{display:inline-flex;gap:4px}
.lang-sw a{padding:6px 10px;border-radius:99px}
.lang-sw a.on{background:var(--ink);color:#fff}
.home .nav{position:absolute;left:0;right:0;top:0;z-index:5;max-width:1240px;margin:0 auto;padding-left:clamp(24px,6vw,72px);padding-right:clamp(24px,6vw,72px)}

/* 玻璃球：统一光照 */
.orb{--s:200px;--hi:#fff;--lo:#C5D3E8;position:absolute;width:var(--s);height:var(--s);border-radius:50%;display:grid;place-items:center;color:#4F6F9F;
  background:radial-gradient(circle at 34% 24%,var(--hi) 0,var(--lo) 80%);
  box-shadow:inset 0 calc(var(--s)*-.07) calc(var(--s)*.13) rgba(20,30,60,.16),inset 0 calc(var(--s)*.025) calc(var(--s)*.05) rgba(255,255,255,.75),0 calc(var(--s)*.13) calc(var(--s)*.22) calc(var(--s)*-.07) rgba(27,35,53,.42)}
.orb::before{content:"";position:absolute;left:15%;right:15%;top:5%;height:30%;border-radius:50%;background:linear-gradient(180deg,rgba(255,255,255,.8),rgba(255,255,255,0))}
.orb svg{width:42%;height:auto;position:relative;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.orb svg .f{fill:currentColor;stroke:none}
.orb.coral{--hi:#FFCDBF;--lo:#F08A77;color:#fff}
.orb.sky{--hi:#E6F0FC;--lo:#86A9D6;color:#fff}
.orb.st{position:relative;flex:none}
.orb .n{position:relative;font:200 calc(var(--s)*.5)/1 var(--sans);letter-spacing:-.05em}
.cursor{position:absolute;filter:drop-shadow(0 10px 14px rgba(27,35,53,.4))}
.cursor svg{display:block;width:100%;height:auto}

/* 首屏 */
.hero{position:relative;background:var(--hero);overflow:hidden;padding:clamp(150px,14vw,200px) 0 clamp(70px,8vw,120px)}
.hero-in{position:relative;z-index:2}
.eyebrow{margin:0 0 22px;color:var(--sub)}
.hero h1{font-size:clamp(34px,6.2vw,88px);line-height:1.16;max-width:11.2em}
html[lang="en"] .hero h1{font-size:clamp(34px,5.4vw,76px);line-height:1.1;max-width:9em}
.nb{display:block}
.sel{background:rgba(255,255,255,.62);border-radius:.07em;padding:0 .04em;margin:0 -.04em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.lede{max-width:34em;font-size:clamp(16px,1.4vw,20px);margin:clamp(22px,3vw,40px) 0 0;color:var(--ink)}
.cta{margin:30px 0 0}
.btn{display:inline-flex;gap:12px;align-items:baseline;background:var(--ink);color:#fff;padding:18px 34px;border-radius:99px;text-decoration:none;font-weight:600;font-size:18px;transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn .ver{font-weight:500;font-size:13px;opacity:.7}
.meta{margin:14px 0 0;font:600 12px/1.5 var(--mono);letter-spacing:.08em;color:var(--sub)}
.soon{display:flex;flex-direction:column;gap:4px;border-radius:20px;padding:16px 20px;background:rgba(255,255,255,.6)}
.facts{list-style:none;margin:28px 0 0;padding:0;max-width:34em;font-size:14.5px;color:var(--sub)}
.facts li{padding-left:18px;position:relative;margin:5px 0}
.facts li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#86A9D6)}
.stair{position:absolute;right:-2vw;bottom:-4%;width:min(60vw,860px);aspect-ratio:860/800;container-type:inline-size;z-index:1}
.stair .orb{--s:10cqw}

/* 区块 */
.sec{position:relative;padding:clamp(80px,10vw,140px) 0;overflow:hidden}
.sec>.in{position:relative;z-index:2}
.k{display:block;margin:0 0 22px;color:var(--sub)}
.sec h2{font-size:clamp(32px,4.2vw,60px);line-height:1.15}
.lead{font-size:clamp(18px,2.3vw,32px);font-weight:500;letter-spacing:-.02em;line-height:1.4;color:var(--ink);max-width:24em;margin:20px 0 0}
.s-how{background:var(--cream)}
.steps{list-style:none;margin:clamp(40px,5vw,70px) 0 0;padding:0;display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
.steps li{position:relative}
.steps .orb{--s:clamp(120px,15vw,230px);margin-bottom:28px}
.steps b{display:block;font:500 clamp(26px,2.6vw,36px)/1.2 var(--sans);letter-spacing:-.03em;margin-bottom:10px}
.steps span.d{display:block;color:var(--sub);max-width:20em}
.s-actions{background:var(--sky-soft)}
.rows{margin-top:clamp(40px,5vw,70px);border-top:1.5px solid var(--ink)}
.row{display:grid;grid-template-columns:auto minmax(0,1.3fr) minmax(0,1fr);align-items:center;gap:clamp(14px,2.4vw,34px);padding:clamp(18px,2vw,28px) 0;border-bottom:1.5px solid var(--ink)}
.row .orb{--s:clamp(56px,7.6vw,110px)}
.row h3{font-size:clamp(24px,3.2vw,46px);line-height:1.15;letter-spacing:-.04em;text-wrap:balance}
.row p{margin:0;color:var(--sub);max-width:26em;font-size:16px}
.s-smart{background:var(--slate);color:#F2EEE6}
.s-smart .lead{color:rgba(242,238,230,.92)}
.smart{display:grid;grid-template-columns:minmax(0,1fr);gap:50px;align-items:center}
.s-smart h2{font-size:clamp(30px,3.4vw,50px)}
.s-smart .list{list-style:none;padding:0;margin:34px 0 0;display:grid;gap:12px}
.s-smart .list li{padding:14px 22px;border-radius:26px;background:rgba(255,255,255,.08);color:rgba(242,238,230,.92)}
.s-smart p.note{color:rgba(242,238,230,.66);margin:24px 0 0;max-width:36em}
.s-smart .orb.bg1{--s:clamp(150px,38vw,560px);right:-8vw;top:-8vw;opacity:.9}
.s-smart .orb.bg2{--s:clamp(120px,21vw,300px);left:38vw;bottom:-6vw;opacity:.85}
.shots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
.shot{margin:0}
.shot img{display:block;width:100%;max-width:330px;border-radius:22px;box-shadow:0 40px 70px -20px rgba(0,0,0,.6)}
.shot figcaption{font-size:13.5px;color:rgba(242,238,230,.7);margin-top:12px;max-width:330px}
.shot:nth-child(2){margin-top:60px}
.s-yours{background:var(--cream)}
.two{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;margin-top:clamp(30px,4vw,50px);border-top:1px solid var(--rule);padding-top:30px}
.two .txt p{margin:0 0 14px;color:var(--sub);max-width:30em}
code{font:13.5px var(--mono);background:rgba(27,35,53,.07);padding:2px 6px;border-radius:6px}
.s-priv{background:var(--sky-soft)}
.s-priv p{max-width:34em;font-size:clamp(16px,1.5vw,20px);margin:0 0 18px}
.s-priv .orb{--s:clamp(150px,30vw,460px);right:-8vw;top:6%;z-index:1}
.s-faq{background:var(--cream)}
.faq{margin-top:34px;border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule);padding:20px 0}
.faq summary{cursor:pointer;font-weight:500;font-size:clamp(18px,1.8vw,22px);letter-spacing:-.01em}
.faq details p{margin:12px 0 0;color:var(--sub);max-width:46em}
.s-price{background:var(--hero);padding-bottom:clamp(140px,20vw,300px)}
.s-price .stair{bottom:-6%;width:min(52vw,720px)}
.s-price .cta{margin-top:36px}

/* 文档页（隐私 / 条款 / 支持 / 更新记录 / 404） */
main.wrap{padding-bottom:20px}
.doc{padding:clamp(30px,5vw,70px) 0 30px;max-width:800px}
.doc h1{font-size:clamp(36px,5.4vw,64px);line-height:1.12;margin:0 0 14px}
.doc h2{font-size:clamp(22px,2.4vw,28px);letter-spacing:-.02em;margin:44px 0 10px}
.sub{color:var(--sub)}
.doc p,.doc li{color:var(--ink)}
.doc a{text-underline-offset:3px}
table{border-collapse:collapse;width:100%;font-size:15px;display:block;overflow-x:auto;background:#fff;border-radius:14px}
th,td{border-bottom:1px solid var(--rule);padding:11px 14px;text-align:left;vertical-align:top}
th{background:var(--sky-soft)}
.rel{border-top:1px solid var(--rule);padding-top:6px}
.rel h2 small{font-size:15px;color:var(--sub);font-weight:400}
.foot{border-top:1px solid var(--rule);margin-top:40px;padding-top:24px;padding-bottom:44px;color:var(--sub);font-size:14px}
.home .foot{margin-top:0;max-width:1240px;padding-left:clamp(24px,6vw,72px);padding-right:clamp(24px,6vw,72px)}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 18px}.foot-links a{color:var(--sub)}
.foot p{margin:10px 0 0}

@media (min-width:860px){
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;align-items:start}
  .steps li:nth-child(1){padding-top:clamp(120px,15vw,220px)}
  .steps li:nth-child(2){padding-top:clamp(60px,7.5vw,110px)}
  .smart{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px}
  .shots{grid-template-columns:repeat(2,minmax(0,330px));gap:28px;justify-content:center}
  .two{grid-template-columns:repeat(2,minmax(0,1fr));gap:56px}
  .hero{min-height:1080px}
}
@media (max-width:859px){
  .hero{padding-top:120px}
  .stair{position:relative;right:auto;bottom:auto;width:100%;max-width:520px;margin:28px 0 -30px auto}
  .row{grid-template-columns:auto minmax(0,1fr)}
  .row p{grid-column:1/-1}
  .shot:nth-child(2){margin-top:30px}
  .s-price .stair{position:relative;width:100%;max-width:520px;margin:30px 0 0 auto;bottom:auto}
  .s-price{padding-bottom:80px}
}
@media (prefers-reduced-motion:reduce){.btn{transition:none}html{scroll-behavior:auto}}