/* 吃了吗 · 官网样式
   和 App 的 app.css 完全分开：App 那套有固定 390px 的 .app 壳，
   这里一旦引进来，桌面浏览器会被塞进手机框里。 */

:root{
  --ink:#2A1A12;
  --ink-2:#5F4C3E;
  --ink-3:#8A7768;
  --tomato:#D2371F;
  --tomato-deep:#A82A16;
  --line:rgba(120,70,40,.14);
  --card:rgba(255,255,255,.58);
  --card-2:rgba(255,255,255,.78);
  --card-line:rgba(255,255,255,.9);
  --shadow:0 18px 50px -28px rgba(120,60,30,.62);
  --glow-1:#FFD9B8;
  --glow-2:#FFC0A6;
  --glow-3:#F3B491;
  --bg-1:#FFF6EC;
  --bg-2:#FBE6D2;
  --bg-3:#F5D9C4;
  --nav-bg:rgba(255,246,236,.72);
}

html[data-theme="dark"]{
  --ink:#F4EAE0;
  --ink-2:#C9B7A6;
  --ink-3:#9C8A7B;
  --tomato:#F0573A;
  --tomato-deep:#FF8163;
  --line:rgba(255,255,255,.12);
  --card:rgba(58,38,28,.56);
  --card-2:rgba(58,38,28,.74);
  --card-line:rgba(255,255,255,.11);
  --shadow:0 18px 50px -24px rgba(0,0,0,.72);
  --glow-1:#4A2A1C;
  --glow-2:#5A2E1E;
  --glow-3:#3A1F14;
  --bg-1:#241710;
  --bg-2:#1C130E;
  --bg-3:#150E0A;
  --nav-bg:rgba(26,18,13,.78);
}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:15px;line-height:1.5;color:var(--ink);
  background:var(--bg-2);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 换主题时的过渡：只过渡颜色，不动布局，避免整页重排卡一下 */
body,.site,.nav,.feat,.end-card,.foot-row,.hero .acts .s,.theme-btn,
.load-card,.about-card{
  transition:background-color .45s ease, color .45s ease,
             border-color .45s ease, box-shadow .45s ease;
}
.site{
  min-height:100vh;
  transition:background .6s ease;
  background:
    radial-gradient(90% 60% at 8% 0%, var(--glow-1) 0%, transparent 60%),
    radial-gradient(80% 50% at 95% 12%, var(--glow-2) 0%, transparent 55%),
    radial-gradient(120% 60% at 50% 100%, var(--glow-3) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 55%, var(--bg-3) 100%);
}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 0;position:sticky;top:0;z-index:20;
  isolation:isolate}
/* 背景铺满整条视口，内容仍旧对齐 1080 的栅格 */
.nav::before{content:"";position:absolute;z-index:-1;
  left:50%;transform:translateX(-50%);width:100vw;top:0;bottom:0;
  background:var(--nav-bg);
  backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line)}
/* 页面滚到顶时不要那条线，避免和首屏打架 */
body.at-top .nav::before{background:transparent;backdrop-filter:none;
  -webkit-backdrop-filter:none;border-bottom-color:transparent}
.nav .brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.nav img{width:32px;height:32px;border-radius:10px;
  box-shadow:0 8px 20px -10px rgba(168,42,22,.7)}
.nav .nm{font-size:17px;font-weight:800;letter-spacing:-.01em}
.nav .right{display:flex;align-items:center;gap:18px}
.nav .links{display:flex;gap:22px;font-size:13.5px;color:var(--ink-2)}
.nav .links a{text-decoration:none;color:inherit;transition:color .2s}
.nav .links a:hover{color:var(--ink)}

/* 日夜切换：一个圆形玻璃按钮，图标交叉淡入 */
.theme-btn{width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  border:1px solid var(--card-line);background:var(--card);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  position:relative;overflow:hidden}
.theme-btn:hover{background:var(--card-2)}
.theme-btn svg{position:absolute;width:20px;height:20px;stroke:var(--ink);
  stroke-width:1.9;fill:none;stroke-linecap:round;stroke-linejoin:round;
  transition:opacity .32s ease, transform .42s cubic-bezier(.4,0,.2,1)}
.theme-btn .sun{opacity:1;transform:rotate(0deg) scale(1)}
.theme-btn .moon{opacity:0;transform:rotate(-50deg) scale(.6)}
html[data-theme="dark"] .theme-btn .sun{opacity:0;transform:rotate(50deg) scale(.6)}
html[data-theme="dark"] .theme-btn .moon{opacity:1;transform:rotate(0deg) scale(1)}

.nav .open{height:40px;padding:0 18px;border-radius:14px;background:var(--tomato);
  color:#FFF8F0;font-size:13.5px;font-weight:700;text-decoration:none;border:0;
  font-family:inherit;cursor:pointer;
  display:flex;align-items:center;gap:7px;
  box-shadow:0 8px 20px -10px rgba(168,42,22,.9)}
.nav .open:hover{filter:brightness(1.06)}
.nav .open svg{width:14px;height:14px;stroke:currentColor;stroke-width:2.2;fill:none;
  stroke-linecap:round;stroke-linejoin:round}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:64px 0 44px}
.hero h1{font-size:52px;line-height:1.16;font-weight:800;letter-spacing:-.03em}
.hero h1 em{font-style:normal;color:var(--tomato-deep)}
.hero p{margin-top:18px;font-size:16px;line-height:1.8;color:var(--ink-2);max-width:460px}
.hero .acts{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero .acts a,.hero .acts button{height:52px;padding:0 24px;border-radius:16px;
  text-decoration:none;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:700;font-family:inherit;cursor:pointer;border:0}
.hero .acts .p{background:var(--tomato);color:#FFF8F0;
  box-shadow:0 10px 26px -12px rgba(168,42,22,.9)}
.hero .acts .p:hover{filter:brightness(1.06)}
.hero .acts .s{background:var(--card-2);color:var(--ink);
  border:1px solid var(--card-line);backdrop-filter:blur(16px)}
.hero .note{margin-top:16px;font-size:12.5px;color:var(--ink-3)}

.phone{position:relative;justify-self:center}
.phone img{width:300px;border-radius:34px;display:block;
  box-shadow:0 34px 74px -32px rgba(120,50,20,.7), 0 0 0 1px var(--card-line)}
.phone::after{content:"";position:absolute;inset:-26px -20px;border-radius:54px;
  background:radial-gradient(60% 60% at 50% 40%, rgba(255,255,255,.5), transparent 70%);
  z-index:-1}

/* ---------- 通用区块 ---------- */
.sec{padding:60px 0}
.sec h2{font-size:34px;font-weight:800;letter-spacing:-.02em;line-height:1.25}
.sec .sub{margin-top:10px;font-size:15px;color:var(--ink-2);line-height:1.7;max-width:580px}

.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.feat{padding:24px 22px;border-radius:24px;background:var(--card);
  border:1px solid var(--card-line);backdrop-filter:blur(18px);
  box-shadow:var(--shadow)}
.feat .n{font-size:11px;font-weight:800;color:var(--tomato-deep);letter-spacing:.14em}
.feat h3{margin-top:10px;font-size:19px;font-weight:800;letter-spacing:-.01em}
.feat p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-2)}
.feat .lnk{display:inline-block;margin-top:14px;color:var(--tomato-deep);
  font-weight:700;text-decoration:none;font-size:13.5px}
.feat .lnk:hover{text-decoration:underline}

.show{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.show .txt h2{font-size:30px}
.show ul{margin-top:22px;list-style:none;display:flex;flex-direction:column;gap:14px}
.show li{display:grid;grid-template-columns:16px 1fr;gap:10px;font-size:14.5px;
  line-height:1.7;color:var(--ink-2)}
.show li i{font-style:normal;color:var(--tomato-deep);font-weight:800}
.show img{width:280px;border-radius:30px;display:block;justify-self:center;
  box-shadow:0 28px 62px -30px rgba(120,50,20,.62), 0 0 0 1px var(--card-line)}

/* ---------- 下载 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.dl{padding:26px 24px;border-radius:24px;background:var(--card);
  border:1px solid var(--card-line);backdrop-filter:blur(18px);
  box-shadow:var(--shadow);display:flex;flex-direction:column}
.dl .os{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--tomato-deep)}
.dl h3{margin-top:10px;font-size:19px;font-weight:800}
.dl p{margin-top:8px;font-size:13.5px;line-height:1.75;color:var(--ink-2);flex:1 1 auto}
.dl .act{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  margin-top:18px;height:44px;border-radius:14px;text-decoration:none;
  font-size:13.5px;font-weight:700;background:var(--tomato);color:#FFF8F0;
  box-shadow:0 10px 24px -12px rgba(168,42,22,.85)}
.dl .act.ghost{background:var(--card-2);color:var(--ink);
  border:1px solid var(--card-line);box-shadow:none}
.dl .meta{margin-top:10px;font-size:11.5px;color:var(--ink-3)}

/* ---------- 关于 ---------- */
.about{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.about-card{padding:30px 28px;border-radius:26px;background:var(--card);
  border:1px solid var(--card-line);backdrop-filter:blur(18px);box-shadow:var(--shadow)}
.about-card h3{font-size:17px;font-weight:800}
.about-card p{margin-top:12px;font-size:14px;line-height:1.85;color:var(--ink-2)}
.about-kv{margin-top:18px;display:flex;flex-direction:column;gap:0}
.about-kv div{display:flex;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.about-kv div:last-child{border-bottom:0}
.about-kv span:first-child{color:var(--ink-3)}
.about-kv span:last-child{color:var(--ink);font-weight:600;text-align:right}
.about-kv a{color:var(--tomato-deep);text-decoration:none}
.about-kv a:hover{text-decoration:underline}

/* ---------- 唤端提示 ---------- */
.toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%, 20px);
  padding:12px 20px;border-radius:16px;background:rgba(42,26,18,.92);color:#FFF8F0;
  font-size:13.5px;font-weight:600;opacity:0;pointer-events:none;z-index:60;
  transition:opacity .28s ease, transform .28s cubic-bezier(.2,.8,.25,1)}
.toast.on{opacity:1;transform:translate(-50%, 0)}

/* ---------- 收尾 ---------- */
.end{padding:20px 0 62px}
.end-card{padding:46px 36px;border-radius:30px;text-align:center;
  background:linear-gradient(150deg, var(--card-2), var(--card));
  border:1px solid var(--card-line);backdrop-filter:blur(22px);
  box-shadow:var(--shadow)}
.end-card h2{font-size:30px;font-weight:800;letter-spacing:-.02em}
.end-card p{margin-top:12px;font-size:15px;color:var(--ink-2)}
.end-card .btns{display:flex;gap:12px;justify-content:center;margin-top:26px;flex-wrap:wrap}
.end-card button,.end-card a{display:inline-flex;align-items:center;gap:8px;
  height:52px;padding:0 28px;border-radius:16px;background:var(--tomato);color:#FFF8F0;
  text-decoration:none;font-size:15px;font-weight:700;font-family:inherit;
  border:0;cursor:pointer;box-shadow:0 10px 26px -12px rgba(168,42,22,.9)}
.end-card .ghost{background:var(--card-2);color:var(--ink);
  border:1px solid var(--card-line);box-shadow:none}

footer{padding:8px 0 44px}
.foot-row{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:22px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-3)}
.foot-row a{color:inherit;text-decoration:none;margin-left:16px}
.foot-row a:hover{color:var(--ink)}

/* 出场 */
.reveal{opacity:1;transform:none}
.anim-ok .reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.25,1)}
.anim-ok .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* ---------- 窄屏 ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:30px;padding:36px 0 24px}
  .hero h1{font-size:38px}
  .hero p{font-size:15px}
  .phone img{width:268px}
  .feats,.dl-grid{grid-template-columns:1fr}
  .show,.about{grid-template-columns:1fr;gap:28px}
  .show .txt{order:2}
  .sec{padding:40px 0}
  .sec h2{font-size:26px}
  .show .txt h2{font-size:24px}
  .nav .links{display:none}
  .end-card{padding:32px 22px}
  .end-card h2{font-size:24px}
  .foot-row{flex-direction:column;gap:10px;align-items:flex-start}
  .foot-row a{margin-left:0;margin-right:16px}
}
@media (max-width:520px){
  .nav{gap:10px}
  .nav .right{gap:10px}
  .nav .open{padding:0 14px;font-size:13px}
  .about-card{padding:24px 20px}
}

/* ---------- 深色下的收尾修正 ---------- */

/* 红底白字在深色下只有 3.25:1，换深色字提到 7:1 */
html[data-theme="dark"] .nav .open,
html[data-theme="dark"] .hero .acts .p,
html[data-theme="dark"] .dl .act:not(.ghost),
html[data-theme="dark"] .end-card button,
html[data-theme="dark"] .end-card a:not(.ghost){
  color:#26140C;
  font-weight:800;
}

/* 产品截图本身是浅色的，深色页面上压一下亮度、加一圈深色描边，
   不然像贴了一块白纸 */
html[data-theme="dark"] .phone img,
html[data-theme="dark"] .show img{
  filter:brightness(.9) saturate(.96);
  box-shadow:0 30px 70px -30px rgba(0,0,0,.85), 0 0 0 1px rgba(255,255,255,.10);
}
html[data-theme="dark"] .phone::after{opacity:.35}

/* 太阳图标在 18px 下有点糊，射线收细一点 */
.theme-btn svg{stroke-width:1.7}

/* 关于段落的中文行宽收一收，一行 30 字左右更好读 */
.about-card p{max-width:34em}
.sec .sub{max-width:36em}

/* ---------- 更新日志 ---------- */
.log{position:relative;margin-top:30px;padding-left:24px;max-width:760px}
.log::before{content:"";position:absolute;left:4px;top:8px;bottom:10px;width:1px;background:var(--line)}
.log-item{position:relative;padding-bottom:28px}
.log-item:last-child{padding-bottom:0}
.log-item::before{content:"";position:absolute;left:-24px;top:7px;width:9px;height:9px;
  border-radius:50%;background:var(--tomato);box-shadow:0 0 0 4px var(--bg-2)}
.log-hd{display:flex;align-items:baseline;gap:12px}
.log-hd b{font-size:16px;font-weight:800;letter-spacing:-.01em}
.log-hd span{font-size:12.5px;color:var(--ink-3)}
.log ul{margin-top:9px;list-style:none;display:flex;flex-direction:column;gap:7px}
.log li{font-size:14px;line-height:1.75;color:var(--ink-2);
  padding-left:14px;position:relative;max-width:34em}
.log li::before{content:"";position:absolute;left:0;top:.74em;width:4px;height:4px;
  border-radius:50%;background:var(--ink-3)}

/* ---------- 反馈 ---------- */
.fb{margin-top:28px;max-width:720px}
.fb-form{padding:22px;border-radius:22px;background:var(--card);
  border:1px solid var(--card-line);backdrop-filter:blur(18px);box-shadow:var(--shadow)}
.fb-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fb input,.fb textarea{width:100%;border-radius:14px;border:1px solid var(--line);
  background:var(--card-2);color:var(--ink);font-family:inherit;font-size:14px;
  padding:12px 14px;outline:none;transition:border-color .2s}
.fb input::placeholder,.fb textarea::placeholder{color:var(--ink-3)}
.fb input:focus,.fb textarea:focus{border-color:var(--tomato)}
.fb textarea{margin-top:10px;height:124px;resize:vertical;line-height:1.75}
.fb-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:14px}
.fb-tip{font-size:12.5px;color:var(--ink-3);line-height:1.6}
.fb-tip a{color:var(--tomato-deep);font-weight:600}
#fbSend{flex:0 0 auto;height:46px;padding:0 26px;border-radius:15px;border:0;cursor:pointer;
  background:var(--tomato);color:#FFF8F0;font-family:inherit;font-size:14px;font-weight:700;
  box-shadow:0 10px 24px -12px rgba(168,42,22,.9)}
#fbSend:hover{filter:brightness(1.05)}
#fbSend:disabled{opacity:.55;cursor:default;filter:none}
.fb-alt{margin-top:14px;font-size:13px;color:var(--ink-3)}
.fb-alt a{color:var(--tomato-deep);text-decoration:none;font-weight:600}
.fb-alt a:hover{text-decoration:underline}

/* 深色下红底白字同样换深色字 */
html[data-theme="dark"] #fbSend{color:#26140C;font-weight:800}

@media (max-width:640px){
  .fb-row{grid-template-columns:1fr}
  .log{padding-left:20px}
  .log-item::before{left:-20px}
}