/* 福佑 AI / Fuyou AI — 站点统一样式（浅色专业风） */

/* ---------- 中英双语 ----------
   语言由服务端按客户端 IP 判定，写入 <html data-lang="zh|en">，
   此处用纯 CSS 控制显示哪一份，因此无 JS 也可用、且不会有闪烁。 */
html:not([data-lang="en"]) .l-en{display:none !important}
html[data-lang="en"] .l-zh{display:none !important}

:root{
  --paper:#FCFBF8;
  --card:#FFFFFF;
  --ink:#172033;
  --ink-2:#2C3A52;
  --muted:#5C6675;
  --line:#E7E3DA;
  --line-2:#D9D4C8;
  --brand:#2E4A7D;
  --brand-2:#3C63A6;
  --brand-soft:#EEF2F9;
  --gold:#A8843C;
  --gold-soft:#F6F0E2;
  --ok:#2E7D5B;
  --warn:#B23A2E;
  --radius:14px;
  --shadow:0 1px 2px rgba(23,32,51,.05), 0 8px 24px rgba(23,32,51,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:15px; line-height:1.75; -webkit-font-smoothing:antialiased;
}
a{color:var(--brand-2); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.35; margin:0; font-weight:700; letter-spacing:-.01em}
p{margin:0}
.wrap{max-width:1080px; margin:0 auto; padding:0 22px}
.narrow{max-width:820px}

/* ---------- 导航 ---------- */
.site-head{
  position:sticky; top:0; z-index:50;
  background:rgba(252,251,248,.92); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.head-in{max-width:1080px; margin:0 auto; padding:0 22px; height:62px; display:flex; align-items:center; gap:18px}
.brand{display:flex; align-items:center; gap:9px; font-weight:800; font-size:16.5px; color:var(--ink); white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{
  width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-2)); color:#fff; font-size:13px; font-weight:800;
  box-shadow:0 2px 6px rgba(46,74,125,.28);
}
.nav{display:flex; gap:4px; margin-left:auto; flex-wrap:wrap}
.nav a{
  color:var(--ink-2); font-size:14px; padding:7px 12px; border-radius:9px; font-weight:500;
}
.nav a:hover{background:var(--brand-soft); text-decoration:none; color:var(--brand)}
.nav a.on{color:var(--brand); background:var(--brand-soft)}
.head-cta{display:flex; gap:8px; margin-left:6px; align-items:center}

/* ---------- 语言切换器 ---------- */
.lang-sw{display:flex; align-items:center; gap:2px; border:1px solid var(--line-2); border-radius:9px; padding:2px; background:#fff}
.lang-sw a{font-size:12px; padding:3px 9px; border-radius:7px; color:var(--muted); font-weight:600; line-height:1.45; letter-spacing:0}
.lang-sw a:hover{text-decoration:none; background:var(--brand-soft); color:var(--brand)}
.lang-sw a.on{background:var(--brand); color:#fff}
.lang-sw a.on:hover{background:var(--brand); color:#fff}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block; border:1px solid transparent; border-radius:10px; cursor:pointer;
  padding:9px 17px; font-size:14px; font-weight:600; font-family:inherit; line-height:1.5;
  background:var(--brand); color:#fff; transition:.15s;
}
.btn:hover{background:var(--brand-2); text-decoration:none; color:#fff}
.btn.ghost{background:transparent; border-color:var(--line-2); color:var(--ink-2)}
.btn.ghost:hover{background:#fff; border-color:var(--brand); color:var(--brand)}
.btn.gold{background:var(--gold); color:#fff}
.btn.gold:hover{background:#96722F; color:#fff}
.btn.sm{padding:6px 12px; font-size:13px; border-radius:8px}
.btn:disabled{opacity:.55; cursor:not-allowed}

/* ---------- 通用块 ---------- */
section{padding:66px 0}
.section-tight{padding:44px 0}
.eyebrow{
  display:inline-block; font-size:12.5px; font-weight:700; letter-spacing:.08em;
  color:var(--gold); background:var(--gold-soft); padding:5px 11px; border-radius:999px; margin-bottom:16px;
}
.h2{font-size:27px; margin-bottom:12px}
.h3{font-size:18px; margin-bottom:8px}
.lead{color:var(--muted); font-size:16px; max-width:720px}
.center{text-align:center}
.center .lead{margin-left:auto; margin-right:auto}
.divider{height:1px; background:var(--line); margin:0}

.grid{display:grid; gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){ .g3,.g4{grid-template-columns:repeat(2,1fr)} }
@media(max-width:620px){ .g2,.g3,.g4{grid-template-columns:1fr} .h2{font-size:22px} section{padding:44px 0} }

.card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px; box-shadow:var(--shadow);
}
.card h3{font-size:16.5px; margin-bottom:7px}
.card p{color:var(--muted); font-size:14px}
.card .ico{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:19px;
  background:var(--brand-soft); margin-bottom:13px;
}

/* ---------- Hero ---------- */
.hero{padding:76px 0 60px; background:linear-gradient(180deg,#F4F1EA 0%, var(--paper) 100%); border-bottom:1px solid var(--line)}
.hero h1{font-size:38px; margin-bottom:18px; letter-spacing:-.02em}
.hero .lead{font-size:17px; max-width:660px}
.hero-cta{display:flex; gap:12px; margin-top:28px; flex-wrap:wrap; align-items:center}
.hero-note{font-size:13px; color:var(--muted); margin-top:14px}
@media(max-width:620px){ .hero h1{font-size:27px} .hero{padding:50px 0 40px} }

/* ---------- 对比 ---------- */
.vs{display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-top:26px}
@media(max-width:780px){ .vs{grid-template-columns:1fr} }
.vs-col{border-radius:var(--radius); padding:22px; border:1px solid var(--line)}
.vs-col.bad{background:#FBFAF8; border-style:dashed}
.vs-col.good{background:#fff; border-color:var(--brand); box-shadow:var(--shadow)}
.vs-col h4{font-size:15px; margin-bottom:14px; display:flex; align-items:center; gap:8px}
.vs-col.bad h4{color:var(--muted)}
.vs-col.good h4{color:var(--brand)}
.vs-col ul{margin:0; padding-left:0; list-style:none}
.vs-col li{padding:7px 0 7px 24px; position:relative; font-size:14px; color:var(--ink-2); border-top:1px solid rgba(0,0,0,.05)}
.vs-col li:first-child{border-top:none}
.vs-col.bad li::before{content:"✕"; position:absolute; left:0; color:#B9AFA0; font-weight:700}
.vs-col.good li::before{content:"✓"; position:absolute; left:0; color:var(--ok); font-weight:700}

/* ---------- 流程步骤 ---------- */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:26px; counter-reset:s}
@media(max-width:880px){ .steps{grid-template-columns:repeat(2,1fr)} }
@media(max-width:560px){ .steps{grid-template-columns:1fr} }
.step{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:18px}
.step .n{
  width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;
  font-size:13px;font-weight:700;margin-bottom:11px;
}
.step h4{font-size:15px; margin-bottom:5px}
.step p{font-size:13.5px; color:var(--muted)}

/* ---------- 定价 ---------- */
.plans{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-top:26px}
@media(max-width:900px){ .plans{grid-template-columns:repeat(2,1fr)} }
@media(max-width:560px){ .plans{grid-template-columns:1fr} }
.plan{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:22px; display:flex; flex-direction:column}
.plan.hot{border-color:var(--gold); box-shadow:0 0 0 3px var(--gold-soft), var(--shadow)}
.plan .tag{font-size:11.5px; font-weight:700; color:var(--gold); margin-bottom:9px}
.plan .name{font-size:16px; font-weight:700}
.plan .price{font-size:29px; font-weight:800; margin:8px 0 4px; letter-spacing:-.02em}
.plan .price small{font-size:14px; font-weight:600; color:var(--muted)}
.plan .q{font-size:13.5px; color:var(--muted); padding-bottom:14px; border-bottom:1px solid var(--line)}
.plan ul{list-style:none; padding:0; margin:14px 0 18px; font-size:13.5px; color:var(--ink-2)}
.plan li{padding:4px 0 4px 18px; position:relative}
.plan li::before{content:"·"; position:absolute; left:4px; color:var(--gold); font-weight:700}
.plan .btn{margin-top:auto; width:100%; text-align:center}

/* ---------- FAQ ---------- */
.faq{margin-top:22px; border-top:1px solid var(--line)}
.qa{border-bottom:1px solid var(--line); padding:18px 0}
.qa .q{font-weight:700; font-size:15.5px; margin-bottom:6px; display:flex; gap:10px}
.qa .q::before{content:"Q"; color:var(--gold); font-weight:800}
.qa .a{color:var(--muted); font-size:14.5px; display:flex; gap:10px}
.qa .a::before{content:"A"; color:var(--brand); font-weight:800}

/* ---------- 声明 ---------- */
.note-box{
  background:var(--gold-soft); border:1px solid #E8DCC0; border-radius:var(--radius);
  padding:20px 22px; font-size:14px; color:#6B5730;
}
.note-box strong{color:#5A4926}
.alert{
  background:#FDF4F3; border:1px solid #F0D9D5; border-radius:var(--radius);
  padding:18px 20px; font-size:14px; color:#7C3B33;
}

/* ---------- 页脚 ---------- */
.site-foot{background:#121B2C; color:#A9B4C6; padding:44px 0 26px; margin-top:20px; font-size:13.5px}
.site-foot a{color:#C8D2E0}
.foot-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:26px}
@media(max-width:780px){ .foot-grid{grid-template-columns:1fr 1fr} }
@media(max-width:520px){ .foot-grid{grid-template-columns:1fr} }
.site-foot h5{color:#fff; font-size:13.5px; margin:0 0 12px; font-weight:700}
.site-foot ul{list-style:none; padding:0; margin:0}
.site-foot li{padding:4px 0}
.foot-brand{display:flex; align-items:center; gap:9px; color:#fff; font-weight:800; font-size:16px; margin-bottom:12px}
.foot-brand .brand-mark{background:linear-gradient(140deg,var(--gold),#C9A45C)}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.1); margin-top:30px; padding-top:18px;
  display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; font-size:12.5px; color:#7F8CA0;
}
.disclaimer{background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08); border-radius:10px; padding:14px 16px; margin-top:18px; color:#93A0B4; font-size:12.5px; line-height:1.7}

/* ---------- 表格 ---------- */
table{width:100%; border-collapse:collapse; font-size:14px}
th,td{text-align:left; padding:12px 14px; border-bottom:1px solid var(--line)}
th{font-size:13px; color:var(--muted); font-weight:600; background:#F7F5F0}
td strong{color:var(--ink)}

/* ---------- 更新日志 ---------- */
.log{border-left:2px solid var(--line); padding-left:22px; margin-left:6px}
.log-item{position:relative; padding-bottom:26px}
.log-item::before{
  content:""; position:absolute; left:-29px; top:6px; width:12px;height:12px;border-radius:50%;
  background:#fff; border:2px solid var(--brand);
}
.log-item .date{font-size:12.5px; color:var(--gold); font-weight:700}
.log-item h4{font-size:16px; margin:5px 0 6px}
.log-item p{font-size:14px; color:var(--muted)}

/* ---------- 背景音乐开关 ---------- */
.music-btn{
  position:fixed; right:18px; bottom:18px; z-index:90;
  width:44px; height:44px; border-radius:50%; padding:0;
  border:1px solid var(--line-2); background:rgba(255,255,255,.92); color:var(--ink-2);
  display:grid; place-items:center; cursor:pointer; transition:.18s;
  box-shadow:var(--shadow);
}
.music-btn:hover{border-color:var(--brand); color:var(--brand)}
/* 图标显示「当前状态」：未播放=静音图标（mi-off），播放中=有声图标（mi-on）。
   旧规则正好写反了：没播时显示有声、播了反而显示静音。 */
.music-btn .mi-on{display:none; line-height:0}
.music-btn .mi-off{display:block; line-height:0}
.music-btn.playing .mi-on{display:block}
.music-btn.playing .mi-off{display:none}
.music-btn.playing{color:var(--brand); border-color:var(--brand); background:var(--brand-soft)}
.music-btn.playing::after{
  content:""; position:absolute; inset:-5px; border-radius:50%;
  border:1px dashed var(--brand); opacity:.32;
  animation:fyd-music-spin 9s linear infinite;
}
@keyframes fyd-music-spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){ .music-btn.playing::after{animation:none} }

/* ---------- 支付结果页 / 订单列表 ---------- */
.pay-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:34px 26px; box-shadow:var(--shadow)}
.pay-ico{
  width:52px; height:52px; margin:0 auto 16px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:26px; font-weight:800; color:#fff; background:var(--muted);
}
.pay-ico.ok{background:var(--ok)}
.pay-ico.wait{background:var(--gold)}
.pay-ico.bad{background:var(--warn)}
.pay-card .big{font-size:34px; font-weight:800; margin:12px 0 4px; letter-spacing:-.02em}
.pay-card .big small{font-size:15px; font-weight:600; color:var(--muted)}
.pay-card .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size:12.5px; color:var(--muted); word-break:break-all; margin-top:10px}
.pay-actions{display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin-top:22px}
.ob{display:inline-block; font-size:12px; font-weight:700; padding:3px 10px; border-radius:999px}
.ob.ok{background:var(--brand-soft); color:var(--brand)}
.ob.wait{background:var(--gold-soft); color:var(--gold)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size:12.5px; color:var(--muted); word-break:break-all}