/* 析文官网 · 共享样式（三页统一引用，单一来源） */

:root{
  --paper:#f7f3ec; --card:#fffdf8; --ink:#1d2a23; --ink-soft:#5c6a61;
  --green:#1e3d2f; --green-deep:#152b21; --accent:#d95d1e; --accent-deep:#bf4c13;
  --line:#e2dacb; --ok:#2e7d52; --warn:#c07a11; --danger:#c0392b;
  --serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"Noto Sans SC",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-padding-top:76px;-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
html,body{min-height:100%}
body{display:flex;flex-direction:column;overflow-x:clip;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
body>main,body>.wrap{flex:1;min-width:0}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background-image:radial-gradient(rgba(29,42,35,.028) 1px,transparent 1px);background-size:22px 22px}
button,a{font-family:inherit}

/* ===== 顶部导航 ===== */
nav{background:rgba(247,243,236,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid transparent;position:sticky;top:0;z-index:50}
.nav-in{transition:max-width .3s ease,margin .3s ease,padding .3s ease,background .3s ease,border-color .3s ease,box-shadow .3s ease}
@media (prefers-reduced-motion: no-preference){
  body.nav-scrolled nav{background:rgba(247,243,236,.6);border-bottom-color:transparent}
  body.nav-scrolled .nav-in{max-width:1064px;margin:10px auto 0;background:rgba(255,253,248,.95);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 32px -20px rgba(21,43,33,.4);padding:10px 20px}
}
.nav-in{max-width:1120px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:900;font-size:19px;letter-spacing:.06em;color:var(--ink);text-decoration:none}
.logo img{width:26px;height:26px;border-radius:6px;object-fit:contain}
.nav-links{display:flex;gap:6px;align-items:center;margin-left:auto}
.nav-link{color:var(--ink-soft);font-size:13px;font-weight:700;text-decoration:none;padding:6px 14px;border-radius:99px;transition:.2s;background:none;border:none}
.nav-link:hover{color:var(--green);background:rgba(30,61,47,.06)}
.nav-link.on{color:var(--green)}
.nav-link.cta{border:1.5px solid var(--green);color:var(--green);padding:6px 14px}
.nav-link.cta:hover{background:var(--green);color:#f3efe6}
@media (max-width:640px){
  .nav-in{padding:10px 14px}
  .logo{font-size:17px;white-space:nowrap}
  .nav-links{gap:2px}
  .nav-link{padding:6px 8px;font-size:12px;white-space:nowrap}
  .nav-link.cta{padding:6px 10px}
}

/* ===== 页脚 ===== */
footer{border-top:1px solid var(--line);padding:20px 24px;text-align:center;font-size:12px;color:var(--ink-soft)}
footer .f-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}
footer .f-links a{color:var(--ink-soft);text-decoration:none}
footer .f-links a:hover{color:var(--green)}
footer .f-icp{margin:6px 0 0}
footer .f-icp a{color:var(--ink-soft);text-decoration:none}
footer .f-icp a:hover{color:var(--green);text-decoration:underline}
footer .foot-icons{display:flex;gap:14px;justify-content:center;align-items:center;margin:10px 0 6px}
footer .foot-icon{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:8px;background:none;border:1px solid var(--line);color:var(--ink-soft);cursor:pointer;transition:.2s;padding:0}
footer .foot-icon:hover{color:var(--green);border-color:var(--green)}
footer .foot-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ===== 顶部公告条（common.js 注入，可关闭） ===== */
.announce{display:flex;align-items:center;justify-content:center;gap:16px;background:var(--green);color:#f3efe6;font-size:12.5px;font-weight:500;padding:9px 48px 9px 16px;position:relative;flex-wrap:wrap}
.announce a{color:#fff;font-weight:700;text-decoration:none;border-bottom:1px solid rgba(243,239,230,.5);padding-bottom:1px;white-space:nowrap}
.announce a:hover{border-color:#fff}
.announce button{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:rgba(243,239,230,.85);font-size:17px;line-height:1;cursor:pointer;padding:4px}
.announce button:hover{color:#fff}

/* ===== Toast（共享） ===== */
#toasts{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{background:var(--green);color:#f3efe6;padding:11px 22px;border-radius:10px;font-size:13.5px;box-shadow:0 12px 30px -10px rgba(21,43,33,.5);animation:tin .35s cubic-bezier(.2,.9,.3,1.2)}
@keyframes tin{from{opacity:0;transform:translateY(14px) scale(.94)}to{opacity:1;transform:none}}

.vs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.vs-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px 22px}
.vs-card .vt{font-size:12px;font-weight:700;color:var(--accent-deep);letter-spacing:.06em;margin-bottom:10px}
.vs-card b{font-family:var(--serif);font-size:16px;font-weight:900;display:block;margin-bottom:8px}
.vs-card p{font-size:12.5px;color:var(--ink-soft);line-height:1.7}
.vs-card p b{font-size:12.5px;font-family:inherit;display:inline;font-weight:700;color:var(--green)}
/* ===== 卡片悬停浮起（各页共用卡类） ===== */
@media (prefers-reduced-motion: no-preference){
  .step,.vs-card,.tech-card,.topup,.plan{transition:transform .25s ease,box-shadow .25s ease}
  .step:hover,.vs-card:hover,.tech-card:hover,.topup:hover{transform:translateY(-3px);box-shadow:0 16px 36px -20px rgba(21,43,33,.35)}
  .plan:hover{transform:translateY(-3px)}
  .announce{animation:announceIn .45s ease}
  @keyframes announceIn{from{transform:translateY(-100%)}to{transform:none}}
}

/* ===== 滚动渐现动画（JS 添加 .reveal，无 JS 时内容原样可见） ===== */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s cubic-bezier(.2,.7,.3,1)}
  .reveal.in{opacity:1;transform:none}
}

/* ===== 图标默认描边（symbols 无内联样式时的兜底） ===== */
svg.ic{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ===== 文档页（terms / privacy） ===== */
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:900;font-size:19px;letter-spacing:.06em;color:var(--ink);text-decoration:none}
.brand img{width:26px;height:26px;border-radius:6px;object-fit:contain}
main.doc{max-width:720px;margin:0 auto;padding:48px 24px 56px;position:relative;z-index:1}
main.doc h1{font-family:var(--serif);font-size:30px;font-weight:900;margin-bottom:10px}
main.doc .lead{font-size:12.5px;color:var(--ink-soft);margin-bottom:26px}
main.doc h2{font-family:var(--serif);font-size:17.5px;font-weight:900;margin:26px 0 8px;color:var(--green)}
main.doc p{font-size:13.5px;line-height:1.8;margin-bottom:8px}
main.doc ul{margin:0 0 10px;padding-left:20px}
main.doc li{font-size:13.5px;line-height:1.8;margin-bottom:6px}
main.doc a{color:var(--accent-deep)}

/* ===== 交错入场（容器 .reveal.in 后，子元素依次落） ===== */
@media (prefers-reduced-motion: no-preference){
  .stagger>*{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
  /* .stagger 与 .reveal 同元素（JS 同时加），也兼容嵌套写法 */
  .reveal.in.stagger>*,
  .reveal.in .stagger>*{opacity:1;transform:none}
  .reveal.in.stagger>*:nth-child(2),
  .reveal.in .stagger>*:nth-child(2){transition-delay:.08s}
  .reveal.in.stagger>*:nth-child(3),
  .reveal.in .stagger>*:nth-child(3){transition-delay:.16s}
  .reveal.in.stagger>*:nth-child(4),
  .reveal.in .stagger>*:nth-child(4){transition-delay:.24s}
  .reveal.in.stagger>*:nth-child(5),
  .reveal.in .stagger>*:nth-child(5){transition-delay:.32s}
  .reveal.in.stagger>*:nth-child(6),
  .reveal.in .stagger>*:nth-child(6){transition-delay:.4s}
  .reveal.in .steps .arrow-r{color:var(--accent-deep);transition:color .4s ease .35s}
  .reveal.in .steps .arrow-r:nth-of-type(2){transition-delay:.55s}
}

/* ===== 截图灯箱 ===== */
.lb{position:fixed;inset:0;z-index:400;background:rgba(18,26,22,.85);display:grid;place-items:center;cursor:zoom-out;animation:lbin .25s ease;padding:20px}
.lb img{max-width:94vw;max-height:92vh;border-radius:12px;box-shadow:0 30px 80px -20px rgba(0,0,0,.6)}
@keyframes lbin{from{opacity:0}to{opacity:1}}

/* ===== 移动端底部下载条 ===== */
.mbar{position:fixed;left:12px;right:12px;bottom:12px;z-index:90;background:var(--green);color:#f3efe6;border-radius:14px;padding:11px 14px;display:none;align-items:center;justify-content:space-between;gap:10px;box-shadow:0 16px 40px -12px rgba(21,43,33,.55);transform:translateY(140%);transition:transform .35s ease}
.mbar b{font-size:13.5px;display:block}
.mbar small{display:block;font-size:10.5px;opacity:.78}
.mbar a{background:#f3efe6;color:var(--green);text-decoration:none;font-weight:700;font-size:13px;border-radius:9px;padding:9px 18px;white-space:nowrap}
@media (max-width:680px){
  body.mbar-show .mbar{display:flex}
  body.mbar-on .mbar{transform:none}
}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;right:22px;bottom:22px;z-index:90;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink-soft);cursor:pointer;display:grid;place-items:center;box-shadow:0 10px 26px -14px rgba(21,43,33,.4);opacity:0;pointer-events:none;transform:translateY(8px);transition:.25s;padding:0}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{color:var(--green);border-color:var(--green)}
.to-top svg{width:18px;height:18px}
@media (max-width:680px){.to-top{display:none}}