/* =====================================================
   miraimind 官网落地页 - 本地样式
   零外部依赖，PC 优先，响应式适配平板/手机
   ===================================================== */
:root{
  --primary:#ff5f8f;
  --primary-2:#9b6bff;
  --grad:linear-gradient(135deg,#ff5f8f,#9b6bff);
  --dark:#27232f;
  --text:#3f3b4c;
  --muted:#8a8596;
  --border:#efeaf4;
  --bg:#ffffff;
  --bg-soft:#faf7fd;
  --primary-soft:#fff1f6;
  --radius:18px;
  --shadow-card:0 8px 24px rgba(155,107,255,.10);
  --shadow-hover:0 16px 36px rgba(155,107,255,.18);
  --nav-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 10px)}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
::selection{background:#ffd9e6;color:var(--dark)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:96px 0}

/* ---------- 通用头部 ---------- */
.sec-head{text-align:center;max-width:740px;margin:0 auto 54px}
.sec-head .tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-soft);border:1px solid #ffd9e6;padding:6px 16px;border-radius:999px;margin-bottom:16px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--dark);line-height:1.3}
.sec-head p{margin-top:14px;font-size:15.5px;color:var(--muted)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;background:var(--grad);color:#fff;font-size:16px;font-weight:600;padding:15px 38px;border-radius:999px;border:none;box-shadow:0 10px 24px rgba(255,95,143,.32);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(255,95,143,.42)}
.btn svg{width:18px;height:18px}

/* ---------- 顶部导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav-in{max-width:1200px;margin:0 auto;padding:0 24px;height:var(--nav-h);display:flex;align-items:center;gap:18px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--dark);white-space:nowrap}
.logo i{width:26px;height:26px;border-radius:8px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo i svg{width:16px;height:16px;fill:#fff}
.nav-links{flex:1;display:flex;justify-content:center;gap:2px;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{font-size:14px;color:var(--text);padding:7px 10px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--primary);background:var(--primary-soft)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft);font-weight:600}
.nav-btn{display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#fff;background:var(--grad);padding:10px 18px;border-radius:999px;white-space:nowrap;box-shadow:0 6px 16px rgba(255,95,143,.3);transition:transform .25s,box-shadow .25s}
.nav-btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,95,143,.4)}

/* ---------- 首屏 Hero ---------- */
.hero{overflow:hidden;padding:calc(var(--nav-h) + 54px) 0 90px;background:radial-gradient(1100px 560px at 82% -8%,#f6edff 0%,transparent 60%),linear-gradient(180deg,#fff 0%,#fdf2f8 100%)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.personas{grid-column:1 / -1;grid-row:2;margin-top:0}
.hero-cta{grid-column:1 / -1;grid-row:3;text-align:center;margin-top:8px}
.hero-cta .hero-actions{justify-content:center}
.hero-cta .hero-sub{justify-content:center}
.hero-badge{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--primary-2);background:#f4edff;border:1px solid #e2d4ff;padding:6px 16px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:46px;font-weight:800;color:var(--dark);line-height:1.22}
.hero h1 .wm{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .v,.dl-title .v{display:inline-flex;align-items:center;margin-left:10px;font-size:15px;font-weight:700;color:var(--primary);background:var(--primary-soft);border:1px solid #ffd9e6;padding:4px 12px;border-radius:999px;vertical-align:middle}
.hero-desc{font-size:17px;color:var(--text);margin:22px 0 32px;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-sub{display:flex;align-items:center;gap:8px;margin-top:20px;font-size:13px;color:var(--muted)}
.hero-sub i{width:6px;height:6px;border-radius:50%;background:#3ecf7b}
.hero-sub b{color:var(--text);font-weight:600}

/* 聊天窗口 */
.chat-card{max-width:470px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:24px;box-shadow:0 24px 64px rgba(155,107,255,.18);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--grad);color:#fff}
.chat-head img{width:46px;height:46px;border-radius:50%;border:2px solid rgba(255,255,255,.85);object-fit:cover;flex-shrink:0}
.chat-info{display:flex;flex-direction:column;min-width:0}
.chat-name{font-size:15px;font-weight:700;line-height:1.3}
.chat-status{font-size:12px;opacity:.95;display:flex;align-items:center;gap:5px}
.chat-status::before{content:"";width:7px;height:7px;border-radius:50%;background:#8dffb4;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(141,255,180,.55)}50%{box-shadow:0 0 0 5px rgba(141,255,180,0)}}
.chat-body{background:#fdf6fb;height:340px;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px;scrollbar-width:thin}
.msg{display:flex;gap:8px;align-items:flex-end;max-width:84%;animation:msgIn .4s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.msg .avatar{width:30px;height:30px;border-radius:50%;object-fit:cover;flex-shrink:0}
.msg .av-me{display:flex;align-items:center;justify-content:center;background:var(--grad);color:#fff;font-size:12px;font-weight:700}
.msg .bubble{padding:11px 15px;font-size:14px;line-height:1.6;border-radius:16px}
.msg.ai .bubble{background:#fff;border:1px solid var(--border);border-top-left-radius:5px;color:var(--text)}
.msg.me .bubble{background:var(--grad);color:#fff;border-top-right-radius:5px}
.msg.me{margin-left:auto;flex-direction:row-reverse}
.typing{display:inline-flex;gap:5px;padding:14px 16px;background:#fff;border:1px solid var(--border);border-radius:16px;border-top-left-radius:5px}
.typing i{width:6px;height:6px;border-radius:50%;background:#cfc7dd;animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes blink{0%,80%,100%{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 14px;background:#fff;border-top:1px solid var(--border)}
.chat-input input{flex:1;min-width:0;border:1px solid var(--border);background:var(--bg-soft);border-radius:999px;padding:11px 16px;font-size:13.5px;color:var(--dark);outline:none;pointer-events:none}
.chat-send{width:44px;height:44px;flex-shrink:0;border:none;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 14px rgba(255,95,143,.35);transition:transform .2s,box-shadow .2s}
.chat-send:hover:not(:disabled){transform:scale(1.06)}
.chat-send:disabled{background:#ddd6e6;box-shadow:none;cursor:not-allowed}
.chat-send svg{width:17px;height:17px}

/* 人设挑选 */
.p-title{text-align:center;font-size:21px;font-weight:700;color:var(--dark)}
.p-sub{text-align:center;font-size:14px;color:var(--muted);margin-top:6px}
.persona-list{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;margin-top:30px}
.persona{width:106px;text-align:center}
.persona .ph{position:relative;width:96px;height:96px;margin:0 auto;border-radius:50%;padding:3px;background:var(--grad);transition:transform .3s,box-shadow .3s}
.persona .ph img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid #fff;transition:transform .3s}
.persona:hover .ph{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona:hover .ph img{transform:scale(1.06)}
.persona .pl{display:block;margin-top:12px;font-size:14px;font-weight:600;color:var(--dark);background:#fff;border:1px solid var(--border);border-radius:999px;padding:6px 8px}

/* ---------- 三步上手 ---------- */
.steps{background:var(--bg-soft)}
.step-list{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.step-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:44px 30px;text-align:center;transition:transform .3s,box-shadow .3s}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step-num{width:58px;height:58px;margin:0 auto 20px;border-radius:50%;background:var(--grad);color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(255,95,143,.3)}
.step-card h3{font-size:19px;color:var(--dark);margin-bottom:10px}
.step-card p{font-size:14.5px;color:var(--muted)}

/* ---------- 产品介绍 ---------- */
.product-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.product h2,.custom h2{font-size:32px;color:var(--dark);font-weight:800;line-height:1.3}
.product .lead,.custom .lead{font-size:15.5px;color:var(--text);margin:18px 0 26px;line-height:1.85}
.p-points{display:flex;gap:14px;flex-wrap:wrap}
.p-point{flex:1;min-width:120px;background:var(--bg-soft);border:1px solid var(--border);border-radius:14px;padding:16px 12px;text-align:center}
.p-point b{display:block;font-size:16px;color:var(--dark)}
.p-point span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
.phone{width:292px;margin:0 auto;background:#2b2437;border-radius:44px;padding:12px;box-shadow:0 30px 70px rgba(39,35,47,.35)}
.phone-screen{background:#fdf6fb;border-radius:34px;overflow:hidden;position:relative}
.phone-notch{position:absolute;top:0;left:50%;transform:translateX(-50%);width:110px;height:24px;background:#2b2437;border-radius:0 0 16px 16px;z-index:2}
.phone-head{display:flex;align-items:center;gap:10px;padding:38px 16px 12px;background:var(--grad);color:#fff}
.phone-head img{width:36px;height:36px;border-radius:50%;border:2px solid rgba(255,255,255,.85);object-fit:cover}
.phone-head b{font-size:14px;display:block;line-height:1.3}
.phone-head span{font-size:11px;opacity:.92}
.phone-body{padding:14px;display:flex;flex-direction:column;gap:12px;min-height:300px}
.p-msg{max-width:82%;padding:10px 13px;font-size:13px;border-radius:14px;line-height:1.55}
.p-msg.ai{background:#fff;border:1px solid var(--border);border-top-left-radius:4px;align-self:flex-start}
.p-msg.me{background:var(--grad);color:#fff;border-top-right-radius:4px;align-self:flex-end}
.phone-input{display:flex;gap:8px;padding:0 14px 14px}
.phone-input i{flex:1;height:34px;background:#fff;border:1px solid var(--border);border-radius:999px}
.phone-input em{width:34px;height:34px;border-radius:50%;background:var(--grad);flex-shrink:0}

/* ---------- 四大核心功能 ---------- */
.features{background:var(--bg-soft)}
.feat-list{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.feat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;gap:20px;transition:transform .3s,box-shadow .3s}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-ic{width:56px;height:56px;flex-shrink:0;border-radius:16px;background:var(--grad);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(255,95,143,.28)}
.feat-ic svg{width:26px;height:26px;stroke:#fff;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.feat-card h3{font-size:18.5px;color:var(--dark);margin-bottom:8px}
.feat-card p{font-size:14.5px;color:var(--text);line-height:1.75}
.feat-pain{margin-top:12px;font-size:13px;color:var(--primary);background:var(--primary-soft);border:1px dashed #ffc4d8;border-radius:10px;padding:9px 13px;line-height:1.6}

/* ---------- 优势对比 ---------- */
.cmp-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-card)}
.cmp-table{width:100%;border-collapse:collapse;min-width:700px}
.cmp-table th,.cmp-table td{padding:16px 22px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--border);white-space:nowrap;transition:background .2s}
.cmp-table tbody tr:hover td{background:#fdf8fb}
.cmp-table tbody tr:hover td.cmp-col{background:linear-gradient(135deg,rgba(255,95,143,.13),rgba(155,107,255,.13))}
.cmp-table tr:last-child td{border-bottom:none}
.cmp-table thead th{background:var(--bg-soft);font-size:15px;color:var(--dark);font-weight:700}
.cmp-table thead th:first-child{color:var(--muted);font-weight:600}
.cmp-table td:first-child{color:var(--dark);font-weight:600}
.cmp-table td:last-child{color:var(--muted)}
.cmp-col{background:linear-gradient(135deg,rgba(255,95,143,.07),rgba(155,107,255,.07))}
.cmp-good{color:var(--primary);font-weight:700}
.cmp-hint{display:none;text-align:center;font-size:12.5px;color:var(--muted);margin-top:12px}

/* ---------- 使用场景 ---------- */
.scenes{background:var(--bg-soft)}
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:960px;margin:0 auto}
.scene-item{display:flex;align-items:flex-start;gap:12px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px 20px;font-size:15px;color:var(--text);line-height:1.6;transition:transform .3s,box-shadow .3s}
.scene-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.scene-last{grid-column:1 / -1;justify-content:center}
.scene-tick{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;margin-top:2px}
.scene-tick svg{width:12px;height:12px;stroke:#fff;fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.scene-vs{text-align:center;margin-top:52px}
.scene-vs .vs{display:inline-flex;align-items:center;gap:18px;background:var(--grad);color:#fff;padding:20px 40px;border-radius:999px;font-size:18px;font-weight:700;box-shadow:0 16px 34px rgba(255,95,143,.35)}
.scene-vs .old{opacity:.68;text-decoration:line-through;font-weight:500}
.scene-vs em{font-style:normal;font-size:14px;font-weight:800;opacity:.9;letter-spacing:2px}

/* ---------- 数据 ---------- */
.data{background:linear-gradient(135deg,#2a2340 0%,#3d2f5e 100%);color:#fff}
.data .sec-head h2{color:#fff}
.data .sec-head p{color:rgba(255,255,255,.72)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.data-item .num{font-size:46px;font-weight:800;line-height:1.1;background:linear-gradient(135deg,#ffb6cd,#c9b0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.data-item .num em{font-style:normal;font-size:22px;font-weight:700}
.data-item p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.78)}

/* ---------- 人设定制 ---------- */
.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.c-feats{display:flex;flex-direction:column;gap:14px}
.c-feat{display:flex;align-items:center;gap:12px;font-size:15px;color:var(--text)}
.c-feat i{width:22px;height:22px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.c-feat i svg{width:11px;height:11px;stroke:#fff;fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.custom-card{background:var(--bg-soft);border:1px solid var(--border);border-radius:22px;padding:32px;box-shadow:var(--shadow-card)}
.cc-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.cc-row:last-child{margin-bottom:0}
.cc-row b{width:64px;font-size:13.5px;color:var(--dark);flex-shrink:0}
.chip{font-size:13px;color:var(--text);background:#fff;border:1px solid var(--border);border-radius:999px;padding:7px 15px}
.chip.on{color:var(--primary);background:var(--primary-soft);border-color:#ffb9d2;font-weight:600}
.cc-input{flex:1;min-width:150px;background:#fff;border:1px solid var(--border);border-radius:999px;padding:9px 16px;font-size:13px;color:var(--muted)}
.cc-bar{display:block;height:10px;border-radius:999px;background:#fff;border:1px solid var(--border);overflow:hidden;margin-top:6px}
.cc-bar i{display:block;height:100%;width:72%;background:var(--grad);border-radius:999px}

/* ---------- 用户评价 ---------- */
.reviews{background:var(--bg-soft)}
.rev-list{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.rev-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .3s,box-shadow .3s}
.rev-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.rev-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rev-av{width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.rev-name{font-size:15px;font-weight:700;color:var(--dark);line-height:1.3}
.rev-stars{font-size:13px;color:#ffb64d;letter-spacing:2px;margin-top:2px}
.rev-text{font-size:14px;color:var(--text);line-height:1.75}

/* ---------- 隐私安全 ---------- */
.pri-list{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.pri-card{display:flex;gap:18px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .3s,box-shadow .3s}
.pri-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.pri-ic{width:52px;height:52px;flex-shrink:0;border-radius:15px;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center}
.pri-ic svg{width:24px;height:24px;stroke:var(--primary);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.pri-card h3{font-size:17px;color:var(--dark);margin-bottom:6px}
.pri-card p{font-size:14px;color:var(--text);line-height:1.7}

/* ---------- 版本更新 ---------- */
.version{background:var(--bg-soft)}
.ver-card{max-width:780px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:38px 42px;box-shadow:var(--shadow-card)}
.ver-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:22px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.ver-tag{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#fff;font-size:15px;font-weight:700;padding:8px 20px;border-radius:999px}
.ver-date{font-size:14px;color:var(--muted)}
.ver-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--text);line-height:1.7;margin-bottom:12px}
.ver-list li:last-child{margin-bottom:0}
.ver-list li::before{content:"";position:absolute;left:4px;top:9px;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.ver-list li b{color:var(--primary);font-weight:700}

/* ---------- FAQ ---------- */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--bg-soft);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow-card)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:none;padding:20px 24px;font-size:15.5px;font-weight:600;color:var(--dark);text-align:left}
.faq-q .fx{width:26px;height:26px;flex-shrink:0;border-radius:50%;background:var(--grad);color:#fff;font-size:17px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.faq-item.open .faq-q .fx{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--text);line-height:1.75}

/* ---------- 下载区域 ---------- */
.download{background:linear-gradient(180deg,#fff 0%,#fdf2f8 100%);text-align:center;padding:104px 0}
.dl-title{font-size:38px;font-weight:800;color:var(--dark)}
.dl-meta{font-size:14px;color:var(--muted);margin:16px 0 36px}
.dl-meta i{font-style:normal;color:var(--dark);font-weight:600}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.dl-btn{display:inline-flex;align-items:center;gap:10px;background:var(--grad);color:#fff;font-size:16px;font-weight:600;padding:16px 34px;border-radius:999px;box-shadow:0 12px 26px rgba(255,95,143,.32);transition:transform .25s,box-shadow .25s}
.dl-btn:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(255,95,143,.42)}
.dl-btn svg{width:18px;height:18px}
.dl-tip{margin-top:26px;font-size:14.5px;color:var(--text)}

/* ---------- 页脚 ---------- */
.footer{background:#262130;color:#a7a1b8;text-align:center;padding:34px 0;font-size:13.5px}
.footer a{color:#fff;font-weight:600}
.footer .fs{margin-top:8px;font-size:12.5px;color:#7e7890}

/* ---------- 返回顶部 ---------- */
#toTop{position:fixed;right:26px;bottom:26px;z-index:90;width:46px;height:46px;border:none;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 22px rgba(255,95,143,.4);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
#toTop.show{opacity:1;visibility:visible;transform:none}
#toTop svg{width:18px;height:18px;stroke:#fff;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 滚动显现 ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}

/* ========== 平板适配 ========== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .personas,.hero-cta{grid-column:auto;grid-row:auto}
  .hero{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .product-grid,.custom-grid{grid-template-columns:1fr;gap:52px}
  .rev-list{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:40px}
  .nav-links a{padding:7px 8px;font-size:13px}
}

/* ========== 手机适配 ========== */
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-in{padding:0 20px;gap:10px;justify-content:space-between}
  .nav-links{display:none}
  .sec{padding:64px 0}
  .sec-head{margin-bottom:40px}
  .sec-head h2{font-size:26px}
  .hero{padding:calc(var(--nav-h) + 38px) 0 48px}
  .hero h1{font-size:30px}
  .hero h1 .v{font-size:13px;margin-left:6px}
  .hero-desc{font-size:15.5px;margin:16px 0 26px}
  .hero-actions .btn{width:100%;max-width:430px}
  .hero-sub{flex-wrap:wrap}
  .persona-list{gap:14px}
  .persona{width:96px}
  .persona .ph{width:84px;height:84px}
  .chat-card{max-width:100%}
  .chat-body{height:320px}
  .step-list{grid-template-columns:1fr;gap:18px}
  .feat-list{grid-template-columns:1fr;gap:18px}
  .cmp-hint{display:block}
  .scene-list{grid-template-columns:1fr}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:36px 20px}
  .data-item .num{font-size:34px}
  .rev-list{grid-template-columns:1fr}
  .pri-list{grid-template-columns:1fr;gap:18px}
  .ver-card{padding:28px 22px}
  .dl-title{font-size:30px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;gap:14px;padding:0 20px}
  .dl-btn{width:100%}
  #toTop{right:16px;bottom:16px}
}