/* 智训体育 官网 — 设计令牌来自 ui-ux-pro-max 设计系统
   Primary #F97316 / On Primary #0F172A / Accent #22C55E
   Background #1F2937 / Card #313742 / Muted #37414F / Border #374151
   字体：设计系统推荐 Barlow Condensed/Barlow，但站部署在国内，
   Google Fonts 不可靠，改用系统中文栈 + 紧字距模拟 condensed 的观感。 */

:root{
  --primary:#F97316;
  --on-primary:#0F172A;
  --accent:#22C55E;
  --bg:#1F2937;
  --bg-deep:#0F172A;
  --card:#313742;
  --muted:#37414F;
  --line:#374151;
  --ink:#F1F5F9;
  --body:#CBD5E1;
  --dim:#94A3B8;
  --ring:#F97316;

  --r-sm:10px; --r:16px; --r-lg:24px;
  --wrap:1200px;
  --pad:24px;          /* .wrap 的左右内边距；.shots 出血要跟着它走 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:240ms;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",
         "Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font:16px/1.7 var(--font);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{color:var(--ink);margin:0;line-height:1.18;letter-spacing:-.02em}
p{margin:0}
svg{fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}

/* 焦点可见性 —— 不能用 outline:none 了事 */
:focus-visible{outline:3px solid var(--ring);outline-offset:3px;border-radius:6px}

.skip{
  position:absolute;left:-9999px;top:0;z-index:99;
  background:var(--primary);color:var(--on-primary);
  padding:12px 20px;border-radius:0 0 var(--r-sm) 0;font-weight:700;
}
.skip:focus{left:0}

/* ── 导航 ─────────────────────────────────────────── */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(15,23,42,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color var(--t) var(--ease),background var(--t) var(--ease);
}
.nav.is-stuck{border-bottom-color:var(--line);background:rgba(15,23,42,.92)}
.nav-in{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);
  font-size:18px;letter-spacing:-.01em;flex:0 0 auto}
.brand img{border-radius:9px}
.nav-links{display:flex;gap:28px;margin-left:auto;font-size:15px}
.nav-links a{color:var(--dim);transition:color var(--t) var(--ease)}
.nav-links a:hover{color:var(--ink)}

/* ── 按钮 ─────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  background:var(--primary);color:var(--on-primary);
  font-weight:800;font-size:16px;letter-spacing:-.01em;
  padding:14px 26px;border-radius:var(--r-sm);
  border:2px solid var(--primary);
  cursor:pointer;
  transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),
             background var(--t) var(--ease),border-color var(--t) var(--ease);
}
.btn:hover{background:#FB8C3A;border-color:#FB8C3A;transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(249,115,22,.34)}
.btn:active{transform:translateY(0)}
.btn .i{width:19px;height:19px;stroke-width:2.1}
.btn-lg{font-size:17px;padding:16px 30px;min-height:56px}
.btn-sm{font-size:14px;padding:10px 18px}
.btn-ghost{
  background:transparent;color:var(--ink);border-color:var(--line);
}
.btn-ghost:hover{background:var(--muted);border-color:var(--dim);box-shadow:none}

/* ── Hero ─────────────────────────────────────────── */
.hero{position:relative;overflow:hidden;background:var(--bg-deep);
  padding:76px 0 96px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-bg::before{
  content:"";position:absolute;inset:-20% -10% auto -10%;height:120%;
  background:
    radial-gradient(52% 46% at 78% 18%,rgba(249,115,22,.28),transparent 68%),
    radial-gradient(40% 40% at 10% 82%,rgba(34,197,94,.14),transparent 70%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(148,163,184,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(148,163,184,.07) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(80% 66% at 50% 34%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(80% 66% at 50% 34%,#000 20%,transparent 78%);
  animation:drift 34s linear infinite;
}
@keyframes drift{to{background-position:56px 56px,56px 56px}}

.hero-in{position:relative;display:grid;grid-template-columns:1.06fr .94fr;
  gap:56px;align-items:center}

.eyebrow{display:inline-flex;align-items:center;gap:9px;
  font-size:14px;font-weight:700;color:var(--primary);
  background:rgba(249,115,22,.12);border:1px solid rgba(249,115,22,.34);
  padding:7px 15px;border-radius:999px;margin-bottom:22px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(34,197,94,.2)}
h1{font-size:clamp(32px,4.6vw,58px);font-weight:900;letter-spacing:-.035em}
.lede{margin-top:22px;font-size:18px;max-width:34em;color:var(--body)}
.lede strong{color:var(--ink);font-weight:700}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.meta{margin-top:20px;font-size:14px;color:var(--dim)}

.hero-art{display:flex;justify-content:center}

/* ── 手机外框 ─────────────────────────────────────── */
.phone{
  width:100%;max-width:262px;aspect-ratio:348/752;
  position:relative;overflow:hidden;background:#000;
  border:8px solid #0b1220;border-radius:34px;
  box-shadow:0 26px 60px rgba(0,0,0,.55),0 0 0 1px rgba(148,163,184,.16);
}
.phone::after{ /* 刘海 */
  content:"";position:absolute;top:7px;left:50%;transform:translateX(-50%);
  width:34%;height:15px;background:#0b1220;border-radius:0 0 11px 11px;z-index:2;
}
.phone img{width:100%;height:100%;object-fit:cover}
.phone-hero{animation:float 6.5s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-13px)}}

/* ── 区块 ─────────────────────────────────────────── */
.sec{padding:96px 0}
.sec-alt{background:var(--bg-deep);border-block:1px solid var(--line)}
.sec-tag{font-size:13px;font-weight:800;letter-spacing:.16em;
  color:var(--primary);text-transform:uppercase;margin-bottom:14px}
.sec-h{font-size:clamp(26px,3.3vw,40px);font-weight:900;letter-spacing:-.03em}
.sec-p{margin-top:16px;font-size:17px;color:var(--dim);max-width:44em}

/* ── 功能卡 ───────────────────────────────────────── */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:52px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 28px;
  transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),
             box-shadow var(--t) var(--ease);
}
.card:hover{transform:translateY(-5px);border-color:rgba(249,115,22,.55);
  box-shadow:0 16px 38px rgba(0,0,0,.34)}
.ico{display:inline-flex;align-items:center;justify-content:center;
  width:50px;height:50px;border-radius:13px;margin-bottom:19px;
  background:rgba(249,115,22,.14);border:1px solid rgba(249,115,22,.3);
  color:var(--primary)}
.ico svg{width:25px;height:25px}
.card h3{font-size:19px;font-weight:800;margin-bottom:11px}
.card p{font-size:15px;color:var(--dim)}

/* ── 截图 ─────────────────────────────────────────── */
.shots{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:52px}
.shot{margin:0;text-align:center}
.shot .phone{max-width:none;border-radius:26px;border-width:6px}
.shot figcaption{margin-top:16px;font-size:13.5px;color:var(--dim);line-height:1.55}
.shot figcaption b{display:block;color:var(--ink);font-size:14.5px;margin-bottom:3px}

/* ── 技术 ─────────────────────────────────────────── */
.tech{display:grid;grid-template-columns:1.35fr 1fr;gap:26px;margin-top:52px}
.tech-main{background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:38px 36px}
.tech-main h3{font-size:22px;font-weight:800;margin-bottom:15px}
.tech-main p{font-size:15.5px;color:var(--dim)}
.ticks{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:13px}
.ticks li{position:relative;padding-left:32px;font-size:15px;color:var(--body)}
.ticks li::before{
  content:"";position:absolute;left:0;top:6px;width:19px;height:19px;border-radius:50%;
  background:rgba(34,197,94,.16);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2322C55E' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12.5 4 4 8-8.5'/%3E%3C/svg%3E");
  background-size:13px;background-repeat:no-repeat;background-position:center;
}
.tech-side{display:grid;gap:18px;align-content:start}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:22px 26px}
.stat b{display:block;font-size:38px;font-weight:900;color:var(--primary);
  line-height:1;letter-spacing:-.04em}
.stat span{display:block;margin-top:9px;font-size:14.5px;color:var(--dim)}

/* ── 下载 ─────────────────────────────────────────── */
.sec-dl{background:var(--bg-deep);border-top:1px solid var(--line)}
.dl-card{
  display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;
  background:linear-gradient(135deg,rgba(249,115,22,.14),rgba(49,55,66,.9) 46%);
  border:1px solid rgba(249,115,22,.34);border-radius:var(--r-lg);
  padding:44px 46px;
}
.dl-ico{border-radius:21px;box-shadow:0 12px 30px rgba(0,0,0,.4)}
.dl-body h2{font-size:26px;font-weight:900;margin-bottom:11px}
.dl-meta{font-size:15px;color:var(--body);font-weight:600}
.dl-note{margin-top:9px;font-size:14px;color:var(--dim)}

/* ── 页脚 ─────────────────────────────────────────── */
.foot{border-top:1px solid var(--line);padding:34px 0;background:var(--bg)}
.foot-in{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--ink)}
.foot-brand img{border-radius:7px}
.foot-copy{margin-left:auto;font-size:13.5px;color:var(--dim)}

/* ── 滚动进入 ─────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity 620ms var(--ease),transform 620ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ── 响应式 ───────────────────────────────────────── */
@media (max-width:1024px){
  .hero-in{grid-template-columns:1fr;gap:44px;text-align:center}
  .hero-copy{display:flex;flex-direction:column;align-items:center}
  .lede{max-width:36em}
  .sec{padding:76px 0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .tech{grid-template-columns:1fr}
  .tech-side{grid-template-columns:repeat(3,1fr)}
  .dl-card{grid-template-columns:1fr;justify-items:center;text-align:center;padding:38px 30px}

  /* 截图改为横向吸附滚动，避免 5 列挤成一团 */
  .shots{grid-template-columns:none;display:flex;gap:18px;overflow-x:auto;
    scroll-snap-type:x mandatory;padding-bottom:14px;
    margin-inline:calc(var(--pad) * -1);padding-inline:var(--pad);
    scrollbar-width:thin;scrollbar-color:var(--line) transparent}
  .shot{flex:0 0 auto;width:236px;scroll-snap-align:center}
}
@media (max-width:768px){
  .nav-links{display:none}
  .grid-3{grid-template-columns:1fr}
  .tech-side{grid-template-columns:1fr}
  .sec{padding:64px 0}
  .hero{padding:56px 0 72px}
  .tech-main{padding:30px 26px}
  .foot-in{flex-direction:column;text-align:center}
  .foot-copy{margin-left:0}
  .cta{width:100%;flex-direction:column}
  .cta .btn{width:100%}
}
@media (max-width:400px){
  :root{--pad:18px}
  .btn-lg{font-size:16px;padding:15px 22px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  .btn:hover,.card:hover{transform:none}
}