/* AI风月 落地页样式 v2 —— 干净原生质感，零外部依赖 */
:root{
  --bg:#ffffff; --bg-soft:#f5f5f7; --bg-card:#ffffff;
  --ink:#1d1d1f; --ink-2:#515154; --ink-3:#6e6e73;
  --line:#e3e3e6; --line-2:#d2d2d7;
  --blue:#0071e3; --blue-dark:#0058b0; --blue-soft:#eaf3ff;
  --radius:18px; --radius-sm:12px;
  --shadow-1:0 1px 2px rgba(0,0,0,.04), 0 4px 14px rgba(0,0,0,.05);
  --shadow-2:0 2px 6px rgba(0,0,0,.05), 0 14px 40px rgba(0,0,0,.08);
  --wrap:1120px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
  font-feature-settings:"tnum";letter-spacing:.01em}
img,svg{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.center{text-align:center}

/* ---------- 顶栏 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(0,0,0,.06)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:19px;color:var(--ink);letter-spacing:-.01em}
.logo .mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#0071e3,#5aa9ff);
  display:grid;place-items:center;color:#fff;font-size:15px;font-weight:700;box-shadow:0 2px 8px rgba(0,113,227,.3)}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{color:var(--ink);font-size:15.5px;font-weight:450;opacity:.82}
.nav-links a:hover{opacity:1;color:var(--blue)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:980px;font-size:16.5px;font-weight:500;
  transition:transform .18s cubic-bezier(.2,.8,.2,1),box-shadow .18s,background .18s;
  border:1px solid transparent;white-space:nowrap;cursor:pointer}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 2px 10px rgba(0,113,227,.28)}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,113,227,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--ink-3);transform:translateY(-1px)}
.btn-sm{padding:10px 22px;font-size:15.5px}
.btn-lg{padding:17px 40px;font-size:17.5px}

/* ---------- 区块 ---------- */
section{padding:92px 0}
.soft{background:var(--bg-soft)}
.eyebrow{display:inline-block;font-size:14px;font-weight:600;color:var(--blue);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px}
h1{font-size:clamp(36px,5.2vw,62px);line-height:1.1;letter-spacing:-.022em;font-weight:700;margin:0 0 22px}
h2{font-size:clamp(28px,3.6vw,42px);line-height:1.16;letter-spacing:-.018em;font-weight:680;margin:0 0 18px}
h3{font-size:20px;line-height:1.32;letter-spacing:-.01em;font-weight:600;margin:0 0 10px}
.lead{font-size:20px;line-height:1.6;color:var(--ink-3);max-width:660px}
.sub{font-size:17.5px;color:var(--ink-3);max-width:640px;line-height:1.7}
.accent{color:var(--blue)}
.center .lead,.center .sub{margin-left:auto;margin-right:auto}

/* ---------- Hero ---------- */
.hero{padding:84px 0 72px;background:#f8fbff}
.hero h1{max-width:900px;margin-left:auto;margin-right:auto}
.hero .lead{margin:0 auto 34px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.hero-note{font-size:14.5px;color:var(--ink-3)}
.hero-note b{color:var(--ink);font-weight:600}

/* ---------- 聊天预览 ---------- */
.chat{margin:56px auto 0;max-width:560px;background:#fff;border:1px solid var(--line);
  border-radius:26px;box-shadow:var(--shadow-2);overflow:hidden}
.chat-bar{display:flex;align-items:center;gap:11px;padding:14px 18px;border-bottom:1px solid var(--line);background:#fbfbfd}
.chat-bar .name{font-size:15.5px;font-weight:600}
.chat-bar .status{font-size:12.5px;color:#2fb344;display:flex;align-items:center;gap:5px}
.chat-bar .status::before{content:"";width:7px;height:7px;border-radius:50%;background:#2fb344}
.chat-body{padding:22px 18px 26px;display:flex;flex-direction:column;gap:16px;background:linear-gradient(180deg,#fcfcfe,#fff)}
.msg{display:flex;gap:11px;align-items:flex-start;max-width:88%}
.msg .bubble{padding:12px 16px;border-radius:18px;font-size:15.5px;line-height:1.6}
.msg.them .bubble{background:#f2f2f5;color:var(--ink);border-bottom-left-radius:6px}
.msg.me{margin-left:auto;flex-direction:row-reverse}
.msg.me .bubble{background:var(--blue);color:#fff;border-bottom-right-radius:6px}

/* ---------- 头像（SVG 人物剪影，非占位符）---------- */
.avatar{width:38px;height:38px;border-radius:50%;flex:0 0 auto;overflow:hidden;
  box-shadow:0 1px 4px rgba(0,0,0,.14)}
.avatar.lg{width:48px;height:48px}
.avatar svg{width:100%;height:100%}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--line-2)}
.card .ico{width:46px;height:46px;border-radius:13px;background:var(--blue-soft);color:var(--blue);
  display:grid;place-items:center;margin-bottom:18px}
.card .ico svg{width:23px;height:23px}
.card p{margin:0;color:var(--ink-2);font-size:16px;line-height:1.68}

/* ---------- 角色卡 ---------- */
.role{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s}
.role:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.role-cover{aspect-ratio:4/3;position:relative;display:grid;place-items:center;overflow:hidden;isolation:isolate}
.role-cover::after{content:"";position:absolute;inset:0;z-index:1;
  background:radial-gradient(120% 80% at 50% 108%,rgba(0,0,0,.26),rgba(0,0,0,0) 70%)}
.rc-scene{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.rc-figure{position:absolute;left:0;right:0;bottom:0;width:100%;height:88%;z-index:2;
  transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.role:hover .rc-figure{transform:translateY(-4px)}
.rc-glyph{position:absolute;top:6%;left:50%;transform:translateX(-50%);z-index:1;
  font-family:"Songti SC","STSong","Source Han Serif SC",serif;font-size:clamp(88px,12vw,132px);
  font-weight:600;color:#fff;opacity:.30;line-height:1;letter-spacing:.04em;pointer-events:none}
.rc-idx{position:absolute;left:18px;top:15px;z-index:2;font-size:11.5px;letter-spacing:.14em;
  color:rgba(255,255,255,.66);font-weight:500}
.rc-sym{position:absolute;right:16px;top:14px;z-index:2;width:25px;height:25px;opacity:.62}
.role-body{padding:20px 22px 24px}
.role-body h3{margin-bottom:6px}
.role-tag{display:inline-block;font-size:13.5px;color:var(--blue);background:var(--blue-soft);
  padding:4px 11px;border-radius:980px;margin-bottom:12px;font-weight:500}
.role-body p{margin:0;font-size:15.5px;color:var(--ink-2);line-height:1.66}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;text-align:center}
.stat .n{font-size:clamp(30px,4vw,44px);font-weight:700;letter-spacing:-.02em;color:var(--ink);line-height:1.1}
.stat .n span{color:var(--blue)}
.stat .l{font-size:15px;color:var(--ink-3);margin-top:8px}

/* ---------- 评价 ---------- */
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  box-shadow:var(--shadow-1);display:flex;flex-direction:column;gap:16px}
.quote .stars{color:#f5a623;font-size:15px;letter-spacing:2px}
.quote p{margin:0;font-size:16px;line-height:1.7;color:var(--ink-2);flex:1}
.quote .who{display:flex;align-items:center;gap:11px;padding-top:16px;border-top:1px solid var(--line)}
.quote .who .nm{font-size:15px;font-weight:600}
.quote .who .rl{font-size:13px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:6px 0}
.faq summary{cursor:pointer;list-style:none;padding:22px 44px 22px 0;font-size:18px;font-weight:550;
  position:relative;letter-spacing:-.008em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:14px;height:14px;
  margin-top:-7px;transition:transform .25s;
  background:currentColor;opacity:.5;
  -webkit-mask:linear-gradient(#000 0 0) center/2px 14px no-repeat,linear-gradient(#000 0 0) center/14px 2px no-repeat;
  mask:linear-gradient(#000 0 0) center/2px 14px no-repeat,linear-gradient(#000 0 0) center/14px 2px no-repeat}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:-4px 0 24px;color:var(--ink-2);font-size:16px;line-height:1.72;max-width:96%}

/* ---------- CTA 区块 ---------- */
.band{background:#075db7;border-radius:28px;padding:64px 40px;
  text-align:center;color:#fff;box-shadow:0 20px 60px rgba(0,113,227,.28)}
.band h2{color:#fff;margin-bottom:14px}
.band p{color:rgba(255,255,255,.88);font-size:18px;margin:0 auto 32px;max-width:520px;line-height:1.65}
.band .btn{background:#fff;color:var(--blue);box-shadow:0 4px 18px rgba(0,0,0,.18)}
.band .btn:hover{background:#f2f7ff;transform:translateY(-1px)}

/* ---------- 页脚 ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 40px;background:#fbfbfd}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.foot-grid h4{font-size:14.5px;margin:0 0 16px;font-weight:600}
.foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.foot-grid a{color:var(--ink-3);font-size:15px}
.foot-grid a:hover{color:var(--blue)}
.foot-about p{color:var(--ink-3);font-size:15px;line-height:1.7;margin:14px 0 0;max-width:320px}
.foot-bot{border-top:1px solid var(--line);padding-top:26px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:14px;color:var(--ink-3)}

/* ---------- 内页头 ---------- */
.page-head{padding:70px 0 52px;background:var(--bg-soft);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(32px,4.4vw,50px);margin-bottom:16px}
.page-head p{font-size:19px;color:var(--ink-3);max-width:680px;margin:0;line-height:1.62}

/* ---------- 图文两栏 ---------- */
.two{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.two ul{margin:0;padding-left:22px;color:var(--ink-2);font-size:16.5px;line-height:1.78}
.two ul li{margin-bottom:9px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-2)}

/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse;font-size:16px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th,td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#fafafc;font-weight:600;font-size:15.5px}
tr:last-child td{border-bottom:none}
td:first-child{color:var(--ink-2)}

/* ---------- 文章 ---------- */
article{max-width:780px;margin:0 auto}
article h2{margin-top:44px;font-size:28px}
article h3{margin-top:30px}
article p,article li{font-size:17px;line-height:1.8;color:var(--ink-2)}
article ul{padding-left:22px}
.meta{font-size:14.5px;color:var(--ink-3);margin-bottom:26px}

/* ---------- 响应式 ---------- */
@media (max-width:940px){
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .two{grid-template-columns:1fr;gap:36px}
  .stats{grid-template-columns:repeat(2,1fr);gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:680px){
  body{font-size:16px}
  section{padding:64px 0}
  .nav-links{display:none}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .hero{padding:56px 0 48px}
  .hero-cta .btn{width:100%}
  .band{padding:46px 24px;border-radius:22px}
  .card{padding:24px}
  .foot-grid{grid-template-columns:1fr}
}

/* ---------- 卡牌悬停 / 细节 ---------- */
.role{transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s}
.role:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(0,0,0,.10)}
.quote{transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s}
.quote:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,0,0,.09)}
.quote .who .avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-size:15px;font-weight:600;flex:none;letter-spacing:0}
.quote .who .avatar svg{width:70%;height:70%;fill:#fff}
.quote .src{margin-top:2px;font-size:12.5px;color:var(--ink-3)}

/* ---------- 角色对话卡 ---------- */
.role-head{display:flex;align-items:center;gap:13px;padding:18px 20px 15px;border-bottom:1px solid var(--line)}
.role-id h3{margin:0 0 5px;font-size:17.5px;letter-spacing:.01em}
.role-head .avatar{width:44px;height:44px}
.dialog{display:flex;flex-direction:column;gap:9px;padding:17px 20px 19px}
.dialog .m{margin:0;max-width:86%;padding:9.5px 14px;border-radius:15px;font-size:14.5px;line-height:1.62}
.dialog .m.them{align-self:flex-start;background:#eef0f4;color:var(--ink);border-bottom-left-radius:5px}
.dialog .m.me{align-self:flex-end;background:var(--blue);color:#fff;border-bottom-right-radius:5px}
.role-foot{margin-top:auto;padding:13px 20px 15px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3);line-height:1.6}
.role-cta{margin:0 20px 18px;padding:11px 0;border-radius:999px;background:var(--blue);color:#fff;
  text-align:center;font-size:14px;font-weight:500;letter-spacing:.01em;
  transition:filter .25s ease,transform .25s ease,box-shadow .25s ease}
.role:hover .role-cta{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 8px 20px rgba(0,113,227,.24)}
.role{display:flex;flex-direction:column}

.role-head .avatar{font-size:18px;font-weight:600;color:#fff;letter-spacing:0;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28), 0 2px 9px rgba(0,0,0,.13)}
.role-tag{background:#f2f2f5;color:var(--ink-2)}

/* ---------- 首屏两栏 ---------- */
.hero{padding:74px 0 86px;background:#f8fbff}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:62px;align-items:center;max-width:1180px;width:100%}
.hero-copy h1{max-width:560px;margin:0 0 20px;font-size:clamp(34px,4.3vw,52px)}
.hero-copy .lead{margin:0 0 30px;max-width:530px;font-size:18.5px}
.hero-cta{justify-content:flex-start;margin-bottom:20px}
.hero .chat{margin:0;max-width:none}

/* ---------- 聊天细节 ---------- */
.chat-who{flex:1}
.chat-more{color:var(--ink-3);font-size:19px;letter-spacing:.08em;line-height:1}
.msg-day{text-align:center;font-size:13px;color:var(--ink-3);margin:0 0 2px}
.bubble .t{display:block;margin-top:5px;font-size:11.5px;opacity:.6;font-variant-numeric:tabular-nums}
.msg.me .bubble .t{text-align:right}
.seen{font-size:11.5px;color:var(--ink-3);align-self:flex-end;padding-bottom:4px}
.typing{display:flex;gap:5px;align-items:center;padding:12px 16px;background:#f2f2f5;
  border-radius:18px;border-bottom-left-radius:6px;width:fit-content}
.typing i{width:6px;height:6px;border-radius:50%;background:#9aa0a6;animation:tp 1.3s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes tp{0%,60%,100%{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
.chat-input{display:flex;align-items:center;gap:12px;padding:13px 16px;border-top:1px solid var(--line);background:#fbfbfd}
.ci-btn{width:22px;height:22px;color:#8a8a8f;flex:none}
.ci-btn svg{width:100%;height:100%}
.ci-ph{flex:1;font-size:14.5px;color:#8a8a8f}
.ci-send{width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;
  display:grid;place-items:center;flex:none;box-shadow:0 2px 8px rgba(0,113,227,.3)}
.ci-send svg{width:18px;height:18px}

@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-copy h1{max-width:none;font-size:clamp(30px,7.4vw,40px)}
  .hero-copy .lead{max-width:none;font-size:17px}
  .hero{padding:50px 0 60px}
  .hero-visual .chat{border-radius:22px}
}

/* ---------- 移动端 ---------- */
@media(max-width:860px){
  .nav-links{display:none}
  .nav .btn-sm{padding:9px 18px;font-size:14.5px}
  .nav .wrap{height:58px}
  section{padding:60px 0}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .wrap{padding:0 18px}
  h1{font-size:clamp(28px,7.6vw,38px);letter-spacing:-.018em}
  h2{font-size:clamp(24px,6.2vw,30px)}
  .lead{font-size:17px}
  .sub{font-size:16px}
  .btn-lg{padding:15px 30px;font-size:16.5px}
  .chat-body{padding:18px 14px 20px;gap:13px}
  .msg{max-width:94%}
  .msg .bubble{font-size:15px;padding:11px 14px}
  .card{padding:24px}
  .role-head,.dialog,.role-foot{padding-left:16px;padding-right:16px}
}
@media(max-width:620px){
  .g3,.g4{grid-template-columns:1fr}
  footer .foot-grid{grid-template-columns:1fr}
}
@media(max-width:420px){
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
}

.chat-cap{margin:15px 0 0;text-align:center;font-size:13px;color:var(--ink-3);letter-spacing:.01em}

/* ---------- 下载页：扫码 / 商店 / 规格 ---------- */
.scan{display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;
  background:var(--bg-soft);border-radius:24px;padding:28px 32px;margin-top:8px}
.scan-qr{background:#fff;border-radius:16px;padding:12px;box-shadow:0 2px 14px rgba(0,0,0,.07)}
.scan-qr svg{width:132px;height:132px;display:block}
.scan-txt h3{margin:0 0 8px;font-size:20px;letter-spacing:-.01em}
.scan-txt p{margin:0 0 12px;font-size:15px;color:var(--ink-2);max-width:480px;line-height:1.6}
.scan-url{font-size:14px;color:var(--blue);font-weight:500;letter-spacing:.01em}
.stores{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.store{display:flex;align-items:center;gap:12px;background:#1d1d1f;color:#fff;
  border-radius:14px;padding:12px 22px 12px 18px;transition:transform .25s ease,box-shadow .25s ease}
.store:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.16)}
.store .st-ic{width:24px;height:24px;flex:none}
.store .st-ic svg{width:100%;height:100%}
.store .st-tx{display:flex;flex-direction:column;line-height:1.15}
.store .st-tx b{font-size:16px;font-weight:600}
.store .st-tx span,.store .st-tx{font-size:11.5px;color:rgba(255,255,255,.72)}
.specs{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.specs>div{background:var(--bg-soft);border-radius:16px;padding:18px 20px}
.specs b{display:block;font-size:19px;letter-spacing:-.01em;margin-bottom:3px}
.specs span{font-size:13px;color:var(--ink-3)}
@media(max-width:760px){
  .scan{grid-template-columns:1fr;gap:20px;padding:22px;text-align:center;justify-items:center}
  .specs{grid-template-columns:1fr 1fr}
  .stores{justify-content:center}
}