/* ============================================================
   LazyBones · AI 智能慢跑垫 官网样式
   设计基调：科技 / 运动 / 简洁
   ============================================================ */
:root{
  --bg-dark:#0A0F1E;
  --bg-dark2:#0F1930;
  --bg-dark3:#132040;
  --surface:#ffffff;
  --bg-soft:#F4F8FF;
  --ink:#101B33;
  --ink2:#43506B;
  --ink3:#7C879E;
  --line:#E4EAF5;
  --brand:#2563EB;
  --brand2:#3D7BFD;
  --cyan:#22D3EE;
  --violet:#7C5CFF;
  --grad:linear-gradient(135deg,#2563EB 0%,#22D3EE 100%);
  --grad-purple:linear-gradient(135deg,#7C5CFF 0%,#4F7CFF 100%);
  --wine:#A8382C;
  --wine2:#D95C3E;
  --wine-gold:#E8B04B;
  --grad-wine:linear-gradient(135deg,#8E2F26 0%,#C94F33 100%);
  --grad-wine2:linear-gradient(135deg,#B03A2E 0%,#E8B04B 100%);
  --shadow:0 18px 50px -18px rgba(16,27,51,.28);
  --shadow-sm:0 8px 24px -12px rgba(16,27,51,.18);
  --radius:18px;
  --radius-sm:12px;
  --container:1180px;
  --nav-h:68px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:hidden}
body{width:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:#fff;
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--dark{background:var(--bg-dark);color:#E7EDFB}
.section--soft{background:var(--bg-soft)}
.section--plain{background:#fff}

/* 标题 */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;
  padding:6px 14px;border-radius:999px;
  background:rgba(37,99,235,.08);
  border:1px solid rgba(37,99,235,.16);
  margin-bottom:18px;
}
.sec-title{font-size:clamp(26px,4vw,38px);font-weight:800;line-height:1.25;letter-spacing:-.01em}
.sec-sub{color:var(--ink2);font-size:17px;max-width:680px;margin-top:14px}
.section--dark .sec-sub{color:#A7B4D0}
.center{text-align:center}
.center .sec-sub{margin-left:auto;margin-right:auto}

/* ============ 顶栏 ============ */
.navbar{
  position:sticky;top:0;z-index:100;
  height:var(--nav-h);
  background:rgba(10,15,30,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
  color:#fff;
}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18.5px;letter-spacing:-.01em}
.brand img{height:22px;width:auto;filter:brightness(1.15)}
.brand .brand-cn{font-size:11.5px;font-weight:600;color:#9FB2D8;margin-top:2px;letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  padding:9px 16px;border-radius:10px;font-size:15px;font-weight:600;color:#DCE5F7;
  transition:.2s;
}
.nav-links a:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-links a.active{color:#fff;background:rgba(37,99,235,.35)}
.nav-links a.is-placeholder{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:0;border-radius:10px;color:#93A4C8;font-weight:500;font-size:14px}
.nav-links a.is-placeholder svg{width:19px;height:19px;display:block}
.nav-links a.is-placeholder .ph-txt{display:none}
.nav-links a.is-placeholder:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;align-items:center;gap:4px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);padding:4px;border-radius:999px}
.lang-switch button{
  border:none;background:transparent;color:#9FB2D8;font-size:13px;font-weight:600;
  padding:5px 11px;border-radius:999px;cursor:pointer;transition:.2s;font-family:inherit;
}
.lang-switch button:hover{color:#fff}
.lang-switch button.active{background:var(--grad);color:#fff}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* ============ 首页 Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 520px at 82% -10%, rgba(37,99,235,.38), transparent 60%),
    radial-gradient(700px 480px at 8% 110%, rgba(34,211,238,.22), transparent 60%),
    var(--bg-dark);
  color:#fff;
  padding:96px 0 110px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse at 70% 30%, #000 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at 70% 30%, #000 30%, transparent 75%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.12em;color:#B9E8FF;
  border:1px solid rgba(34,211,238,.4);background:rgba(34,211,238,.1);
  padding:7px 16px;border-radius:999px;margin-bottom:22px;
}
.hero h1{font-size:clamp(34px,5vw,54px);font-weight:900;line-height:1.12;letter-spacing:-.02em}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{margin:22px 0 34px;font-size:18px;color:#B9C6E4;max-width:540px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-size:15.5px;font-weight:700;cursor:pointer;
  transition:.25s;border:none;font-family:inherit;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px -10px rgba(37,99,235,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 38px -10px rgba(37,99,235,.8)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border:1px solid rgba(255,255,255,.22)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-2px)}
.hero-visual{position:relative}
.hero-visual .glow{position:absolute;inset:-8%;background:radial-gradient(closest-side, rgba(34,211,238,.35), transparent);filter:blur(20px)}
/* hero 蓝色主题覆盖 */
.hero .btn-primary{background:var(--grad);box-shadow:0 12px 30px -10px rgba(37,99,235,.75)}
.hero .btn-primary:hover{box-shadow:0 18px 38px -10px rgba(37,99,235,.85)}
.hero .stat b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-visual img{position:relative;width:100%;border-radius:26px;box-shadow:0 40px 90px -30px rgba(0,0,0,.65)}
.float-chip{
  position:absolute;z-index:3;display:flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(8px);border-radius:14px;padding:12px 16px;font-size:13.5px;font-weight:600;
}
.float-chip b{font-size:19px}
.chip-1{top:8%;left:-4%;}
.chip-2{bottom:10%;right:-3%;}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:64px;position:relative}
.stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:20px;text-align:center}
.stat b{display:block;font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13.5px;color:#A7B4D0}

/* 通用卡片网格 */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:.25s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(37,99,235,.25)}
.card .ico{
  width:54px;height:54px;border-radius:15px;display:flex;align-items:center;justify-content:center;
  background:rgba(37,99,235,.09);color:var(--brand);margin-bottom:18px;
}
.card h3{font-size:18px;font-weight:800;margin-bottom:8px}
.card p{color:var(--ink2);font-size:14.5px}

/* 产品展示（颜色） */
.showcase{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.sc-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.sc-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.sc-item .ph{aspect-ratio:1/1;background:linear-gradient(160deg,#F2F6FF,#FFFFFF);display:flex;align-items:center;justify-content:center;padding:18px}
.sc-item .ph img{width:88%;border-radius:14px}
.sc-item .meta{padding:16px 20px;border-top:1px solid var(--line)}
.sc-item .meta b{font-size:15.5px}
.sc-item .meta span{display:block;font-size:13px;color:var(--ink3);margin-top:2px}

/* 图文交错 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split .media{position:relative}
.split .media img{border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.split .tick{display:flex;gap:10px;margin-top:12px;align-items:flex-start}
.split .tick .dot{width:22px;height:22px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;flex:none;margin-top:3px}
.split .tick b{display:block;font-size:15.5px}
.split .tick span{font-size:14px;color:var(--ink2)}

/* 视频 */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{border-radius:var(--radius);overflow:hidden;background:#0D1526;border:1px solid rgba(255,255,255,.08)}
.video-card video{width:100%;aspect-ratio:16/10;object-fit:cover;background:#000;display:block}
.video-card .cap{padding:16px 18px;color:#DCE5F7;font-size:14.5px;font-weight:600}
.video-card .cap span{display:block;color:#8FA0C6;font-size:12.5px;font-weight:500;margin-top:2px}

/* 真实运动瞬间 */
.life-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.life-item{margin:0;border-radius:var(--radius);overflow:hidden;position:relative;box-shadow:var(--shadow-sm)}
.life-item img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;transition:.45s}
.life-item:hover img{transform:scale(1.05)}
.life-item figcaption{position:absolute;left:0;right:0;bottom:0;padding:36px 18px 14px;color:#fff;font-size:14.5px;font-weight:600;background:linear-gradient(transparent,rgba(10,15,30,.74))}

/* CTA 横幅 */
.cta-banner{
  position:relative;overflow:hidden;border-radius:26px;
  background:var(--grad);
  padding:58px 56px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.cta-banner h2{font-size:clamp(22px,3vw,32px);font-weight:800;line-height:1.3}
.cta-banner p{margin-top:6px;opacity:.92}
.cta-banner .btn{background:#fff;color:var(--brand)}
.cta-banner .btn:hover{transform:translateY(-2px)}

/* 页脚 */
.footer{background:var(--bg-dark);color:#A7B4D0;padding:64px 0 40px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.foot-grid h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.foot-grid a{display:block;font-size:14px;padding:5px 0;color:#9AABCC;transition:.2s}
.foot-grid a:hover{color:#fff}
.foot-grid p{font-size:14px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:26px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px}

/* ============ 产品页 ============ */
.page-hero{
  background:
    radial-gradient(760px 480px at 85% -5%, rgba(124,92,255,.30), transparent 60%),
    radial-gradient(600px 420px at 0% 110%, rgba(37,99,235,.30), transparent 60%),
    var(--bg-dark);
  color:#fff;padding:80px 0;
}
.page-hero .crumbs{font-size:13.5px;color:#93A5CE;margin-bottom:16px}
.page-hero .crumbs a:hover{color:#fff}
.page-hero h1{font-size:clamp(30px,4.4vw,46px);font-weight:900;letter-spacing:-.02em}
.page-hero p{color:#B9C6E4;font-size:17px;margin-top:14px;max-width:680px}

/* 规格表 */
.spec-wrap{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius)}
.spec-row{display:grid;grid-template-columns:220px 1fr;gap:20px;padding:16px 24px;align-items:center}
.spec-row:nth-child(odd){background:var(--bg-soft)}
.spec-row .k{font-weight:700;font-size:14.5px;color:var(--ink)}
.spec-row .v{font-size:14.5px;color:var(--ink2)}

/* APP 截图 */
.app-screens{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-screen{border-radius:20px;overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--line);background:#0E1626}
.app-screen img{width:100%;aspect-ratio:9/15.5;object-fit:cover;display:block}
.app-screen .t{padding:12px 14px;color:#fff;font-size:13.5px;font-weight:600}

/* 音乐播放卡 */
.music-card{
  display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:14px 18px;margin-bottom:12px;
}
.music-card .play{
  width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none;font-size:16px;transition:.2s;
}
.music-card .play:hover{transform:scale(1.08)}
.music-card .mc-bpm{font-size:13px;font-weight:800;color:var(--brand);background:rgba(37,99,235,.09);border-radius:8px;padding:4px 10px;flex:none}
.music-card .mc-name{font-weight:700;font-size:14.5px}
.music-card .mc-type{font-size:12.5px;color:var(--ink3)}
.music-card audio{flex:1;min-width:120px;height:34px}

/* 暗色段内卡片 */
.card--dark{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.1)}
.card--dark h3{color:#fff}
.card--dark p{color:#A7B4D0}
.card--dark .ico{background:rgba(34,211,238,.14);color:#7BE0F7}

/* ============ 超慢跑页 ============ */
.benefit-list{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.benefit-item{display:flex;gap:18px;padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.benefit-item .num{
  flex:none;width:52px;height:52px;border-radius:15px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;
}
.benefit-item h3{font-size:17.5px;font-weight:800;margin-bottom:6px}
.benefit-item p{font-size:14.5px;color:var(--ink2)}

.steps{position:relative;padding-left:0}
.step{display:flex;gap:20px;margin-bottom:26px}
.step .n{
  flex:none;width:58px;height:58px;border-radius:50%;background:#fff;border:2px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;color:var(--brand);
}
.step .n.on{background:var(--grad);color:#fff;border-color:transparent}
.step h3{font-size:17.5px;font-weight:800}
.step p{color:var(--ink2);font-size:14.5px;margin-top:4px}

.bpm-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.bpm-table th,.bpm-table td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
.bpm-table th{background:var(--bg-soft);font-weight:700}
.bpm-table tr:last-child td{border-bottom:none}
.bpm-table td b{color:var(--brand)}

/* 暗色 hero 小变体 */
.hero--jog{
  background:
    radial-gradient(820px 500px at 18% -10%, rgba(34,211,238,.30), transparent 60%),
    radial-gradient(720px 460px at 95% 115%, rgba(124,92,255,.34), transparent 60%),
    var(--bg-dark);
}

/* ============ 响应式 ============ */
@media (max-width:1020px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:560px;margin:0 auto}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .showcase{grid-template-columns:repeat(2,1fr)}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .life-grid{grid-template-columns:repeat(2,1fr)}
  .app-screens{grid-template-columns:repeat(3,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:36px}
}
@media (max-width:720px){
  .section{padding:64px 0}
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;background:rgba(10,15,30,.98);
    flex-direction:column;align-items:stretch;padding:16px 20px 26px;gap:4px;
    transform:translateY(-120%);transition:.3s;border-bottom:1px solid rgba(255,255,255,.1);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 16px;font-size:16px}
  .nav-links a.is-placeholder{width:44px;height:44px;padding:0;justify-content:center}
  .nav-toggle{display:block}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .showcase{grid-template-columns:1fr 1fr}
  .video-grid,.app-screens{grid-template-columns:1fr}
  .life-grid{grid-template-columns:1fr}
  .benefit-list{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .spec-row{grid-template-columns:1fr;gap:4px}
  .cta-banner{padding:40px 28px}
  .chip-1{left:0}.chip-2{right:0}
  .foot-grid{grid-template-columns:1fr}
}