/* ============================================================
   BaiRui Sports · Shared Stylesheet (V3.5)
   站点所有页面共享 · 设计 Token 单一来源
   ============================================================ */

/* ========== DESIGN TOKENS ========== */
:root{
  /* 配色 */
  --ink:#0a0a0a; --ink-2:#1d1d1f; --gray:#6e6e73; --gray-2:#86868b;
  --line:#e5e5ea; --line-2:#d2d2d7;
  --bg:#ffffff; --bg-2:#fbfbfd; --bg-3:#f5f5f7;
  --orange:#FF5722; --orange-d:#E64A19; --orange-l:#FF7043;
  --blue:#007AFF; --green:#34C759;
  /* 阴影 */
  --shadow-sm:0 1px 2px rgba(0,0,0,0.04);
  --shadow:0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg:0 20px 60px rgba(0,0,0,0.10);
  /* 尺寸 */
  --max:1280px;
  /* 圆角 */
  --r-sm:8px; --r-md:12px; --r-lg:18px; --r-xl:24px;
}

/* ========== BASE ========== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  font-family:'Inter','SF Pro Display','Helvetica Neue',Arial,sans-serif;
  color:var(--ink);background:var(--bg);font-weight:400;line-height:1.5;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:0 40px}
/* ========== 占位体系 ==========
   1) 行内数据占位（TBC）：中性灰，专业，不暴露"未完成"痕迹
   2) 图片空位（.hero-img-wrap / .stock-img / .stock-img-large / .quality-img / .story-img 内）：
      深色底上的浅色胶囊标签，像"图片加载中"而不是破损占位
   —— 素材到位后整块替换成 <img> 即可，无需改样式 */
.ph{color:#8A8F98;background:rgba(0,0,0,0.045);padding:1px 6px;border-radius:5px;font-style:normal;font-weight:600;font-size:0.94em;letter-spacing:0.01em;white-space:nowrap}
.hero-img-wrap .ph,.stock-img .ph,.stock-img-large .ph,.quality-img .ph,.story-img .ph{
  color:rgba(255,255,255,0.88) !important;
  background:rgba(255,255,255,0.10) !important;
  border:1px solid rgba(255,255,255,0.24) !important;
  padding:8px 18px;border-radius:100px;
  font-size:11px;font-weight:700;letter-spacing:0.10em;text-transform:uppercase;
  font-style:normal;white-space:nowrap;backdrop-filter:blur(6px);
}

/* ========== NAV ========== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  background:rgba(255,255,255,0.72);
  border-bottom:1px solid rgba(0,0,0,0.06);
  transition:all .3s ease;
}
.nav.scrolled{background:rgba(255,255,255,0.95);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-0.02em;color:var(--ink)}
.logo-mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,#FF5722 0%,#FF8A65 100%);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:900;font-size:18px;letter-spacing:-0.04em;
  box-shadow:0 4px 12px rgba(255,87,34,0.3);
}
.nav-menu{display:flex;gap:32px;list-style:none;font-size:14px;font-weight:500}
.nav-menu a{color:var(--ink-2);transition:color .2s;position:relative}
.nav-menu a:hover{color:var(--orange)}
.nav-menu a::after{content:'';position:absolute;left:0;right:0;bottom:-22px;height:2px;background:var(--orange);transform:scaleX(0);transition:transform .2s}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--orange)}
.nav-cta{display:flex;align-items:center;gap:14px}
.lang-switch{font-size:13px;color:var(--gray);display:flex;align-items:center;gap:4px;cursor:pointer}
.lang-switch:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--r-sm);font-weight:600;font-size:14px;transition:all .2s;cursor:pointer;border:none;font-family:inherit}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#333;transform:translateY(-1px)}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{background:var(--orange-d);transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,87,34,0.3)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn-ghost:hover{background:var(--bg-3)}

/* ========== SECTION ========== */
section{padding:100px 0;position:relative}
.sec-eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:0.16em;
  color:var(--orange);text-transform:uppercase;margin-bottom:16px;
}
.sec-h2{
  font-size:clamp(32px,3.6vw,48px);font-weight:800;
  line-height:1.06;letter-spacing:-0.03em;color:var(--ink);margin-bottom:24px;
  max-width:880px;
}
.sec-h2 .accent{color:var(--orange)}
.sec-lead{
  font-size:17px;font-weight:400;line-height:1.55;color:var(--gray);
  max-width:680px;margin-bottom:48px;
}

/* ========== HERO ========== */
.hero{
  position:relative;height:88vh;min-height:600px;max-height:820px;
  margin-top:64px;overflow:hidden;
}
.hero-track{display:flex;width:500%;height:100%;transition:transform .8s cubic-bezier(.45,.05,.25,1)}
.hero-slide{
  position:relative;width:20%;height:100%;flex-shrink:0;
  display:flex;align-items:center;overflow:hidden;
}
.hero-slide::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,#0a0a0a 0%,#1d1d1f 100%);
  z-index:-2;
}
.hero-slide[data-theme="warm"]::before{background:linear-gradient(135deg,#FF5722 0%,#E64A19 50%,#BF360C 100%)}
.hero-slide[data-theme="cool"]::before{background:linear-gradient(135deg,#1a3a52 0%,#0a1f33 100%)}
.hero-slide[data-theme="industrial"]::before{background:linear-gradient(135deg,#2a2a2e 0%,#0a0a0a 100%)}
.hero-slide[data-theme="premium"]::before{background:linear-gradient(135deg,#0a0a0a 0%,#1d1d1f 60%,#3a3a3c 100%)}
.hero-slide::after{
  content:'';position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(circle at 70% 30%, rgba(255,87,34,0.25) 0%, transparent 50%);
}
.hero-slide[data-theme="cool"]::after{background:radial-gradient(circle at 80% 20%, rgba(0,122,255,0.20) 0%, transparent 50%)}
.hero-content{
  position:relative;z-index:2;width:100%;
  padding:0 80px;max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
}
.hero-text{color:#fff}
.hero-eyebrow{
  display:inline-block;padding:6px 14px;
  background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.18);
  border-radius:100px;font-size:12px;font-weight:600;letter-spacing:0.08em;text-transform:uppercase;
  backdrop-filter:blur(10px);margin-bottom:24px;
}
.hero-eyebrow.hot{background:rgba(255,87,34,0.20);border-color:rgba(255,87,34,0.4)}
.hero-h1{
  font-size:clamp(44px,5.6vw,80px);font-weight:800;
  line-height:1.02;letter-spacing:-0.04em;margin-bottom:24px;
  text-shadow:0 2px 20px rgba(0,0,0,0.3);
}
.hero-h2{
  font-size:clamp(18px,1.8vw,26px);font-weight:500;line-height:1.4;
  margin-bottom:32px;max-width:520px;color:rgba(255,255,255,0.92);
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-cta .btn{padding:14px 26px;font-size:15px;border-radius:var(--r-md)}
.hero-visual{position:relative;height:100%;display:flex;align-items:center;justify-content:center}
.hero-img-wrap{
  width:440px;height:440px;border-radius:var(--r-xl);
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);
  backdrop-filter:blur(20px);
  display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}
.hero-stat-grid{
  position:absolute;display:grid;grid-template-columns:1fr 1fr;gap:14px;
  width:100%;padding:24px;
}
.hero-stat{
  background:rgba(0,0,0,0.55);backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,0.10);border-radius:var(--r-md);
  padding:18px 16px;text-align:center;color:#fff;
}
.hero-stat-num{font-size:28px;font-weight:800;line-height:1;letter-spacing:-0.02em;color:var(--orange)}
.hero-stat-lbl{font-size:11px;font-weight:500;color:rgba(255,255,255,0.7);margin-top:4px;letter-spacing:0.04em}
.hero-indicators{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  display:flex;gap:10px;z-index:5;
}
.hero-dot{
  width:36px;height:4px;border-radius:2px;background:rgba(255,255,255,0.3);
  cursor:pointer;transition:all .3s;
}
.hero-dot.active{background:#fff;width:48px}
.hero-arrows{
  position:absolute;top:50%;left:0;right:0;transform:translateY(-50%);
  display:flex;justify-content:space-between;padding:0 24px;z-index:5;pointer-events:none;
}
.hero-arrow{
  width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,0.10);backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,0.18);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:18px;cursor:pointer;pointer-events:auto;
  transition:all .2s;
}
.hero-arrow:hover{background:rgba(255,255,255,0.2);transform:scale(1.08)}
.hero-progress{position:absolute;bottom:0;left:0;right:0;height:3px;background:rgba(255,255,255,0.1);z-index:5}
.hero-progress-bar{height:100%;background:var(--orange);width:0%;transition:width 0.05s linear}

/* ========== TRUST BAR ========== */
.trust-bar{padding:36px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2)}
.trust-bar-grid{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.trust-bar-label{font-size:11px;font-weight:700;letter-spacing:0.16em;color:var(--gray);text-transform:uppercase;flex-shrink:0}
.trust-bar-logos{display:flex;gap:32px;flex-wrap:wrap;align-items:center}
.trust-logo{
  height:24px;min-width:80px;display:flex;align-items:center;justify-content:center;
  color:var(--gray-2);font-size:12px;font-weight:700;letter-spacing:0.04em;
  padding:6px 12px;border:1px dashed var(--line-2);border-radius:6px;
}

/* ========== INDUSTRY EDGE ========== */
.industry{background:var(--bg-2)}
.industry-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);
}
.industry-stat{padding:36px 28px;text-align:center;border-right:1px solid var(--line);position:relative}
.industry-stat:last-child{border-right:none}
.industry-stat-num{
  font-size:44px;font-weight:800;line-height:1;letter-spacing:-0.03em;
  background:linear-gradient(135deg,#FF5722 0%,#FF8A65 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.industry-stat-unit{font-size:16px;font-weight:600;color:var(--ink);margin-left:2px}
.industry-stat-lbl{font-size:12px;color:var(--gray);margin-top:8px;font-weight:500}

/* ========== READY STOCK ========== */
.ready-stock{background:var(--ink);color:#fff;overflow:hidden;position:relative}
.ready-stock::before{
  content:'';position:absolute;top:-20%;right:-10%;width:60%;height:140%;
  background:radial-gradient(circle,rgba(255,87,34,0.25) 0%,transparent 60%);
  pointer-events:none;
}
.ready-stock .sec-h2,.ready-stock .sec-lead{color:#fff}
.ready-stock .sec-eyebrow{color:var(--orange-l)}
.ready-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.stock-card{
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:var(--r-lg);
  overflow:hidden;transition:all .3s;cursor:pointer;
  backdrop-filter:blur(20px);
}
.stock-card:hover{
  transform:translateY(-6px);
  border-color:var(--orange);
  box-shadow:0 20px 60px rgba(255,87,34,0.25);
}
.stock-img{
  aspect-ratio:4/3;background:linear-gradient(135deg,#1d1d1f 0%,#0a0a0a 100%);
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
/* .stock-img .ph 已并入上方统一占位规则 */
.stock-badge{
  position:absolute;top:14px;left:14px;
  padding:5px 12px;border-radius:100px;
  background:var(--orange);color:#fff;font-size:11px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;
}
.stock-meta{padding:22px}
.stock-cat{font-size:11px;color:var(--orange-l);font-weight:700;letter-spacing:0.08em;text-transform:uppercase;margin-bottom:8px}
.stock-title{font-size:16px;font-weight:700;line-height:1.3;margin-bottom:14px}
.stock-specs{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:14px;font-size:12px}
.stock-spec{display:flex;justify-content:space-between;color:rgba(255,255,255,0.6)}
.stock-spec strong{color:#fff;font-weight:600}
.stock-foot{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid rgba(255,255,255,0.10)}
.stock-price{font-size:20px;font-weight:800;color:var(--orange-l)}
.stock-cta{
  padding:7px 14px;background:rgba(255,87,34,0.15);
  border:1px solid var(--orange);border-radius:var(--r-sm);
  color:var(--orange-l);font-size:12px;font-weight:600;
  transition:all .2s;
}
.stock-card:hover .stock-cta{background:var(--orange);color:#fff}

/* ========== CAPABILITY ========== */
.capability-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cap-card{
  padding:24px 20px;border-radius:var(--r-md);
  background:#fff;border:1px solid var(--line);
  transition:all .3s;cursor:pointer;
}
.cap-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.cap-icon{
  width:48px;height:48px;border-radius:var(--r-md);
  background:linear-gradient(135deg,rgba(255,87,34,0.10) 0%,rgba(255,87,34,0.04) 100%);
  display:flex;align-items:center;justify-content:center;
  color:var(--orange);font-size:22px;margin-bottom:16px;
}
.cap-title{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--ink)}
.cap-desc{font-size:13px;color:var(--gray);line-height:1.5}

/* ========== CAPACITY BAND ========== */
.capacity-band{padding:80px 0}
.capacity-band-inner{
  background:linear-gradient(135deg,#0a0a0a 0%,#1d1d1f 100%);
  border-radius:var(--r-xl);padding:64px 56px;color:#fff;position:relative;overflow:hidden;
}
.capacity-band-inner::before{
  content:'';position:absolute;top:-50%;right:-20%;width:80%;height:200%;
  background:radial-gradient(circle,rgba(255,87,34,0.18) 0%,transparent 50%);
  pointer-events:none;
}
.capacity-band h2{color:#fff;margin-bottom:40px}
.capacity-band h2 .accent{color:var(--orange-l)}
.capacity-stats{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;position:relative;z-index:2}
.cap-stat{text-align:center}
.cap-stat-num{font-size:36px;font-weight:800;color:var(--orange-l);line-height:1;letter-spacing:-0.02em}
.cap-stat-unit{font-size:13px;color:rgba(255,255,255,0.7);font-weight:500;margin-top:4px}
.cap-stat-lbl{font-size:11px;color:rgba(255,255,255,0.5);margin-top:6px;letter-spacing:0.04em}

/* ========== FOOTER ========== */
footer{background:var(--ink);color:rgba(255,255,255,0.7);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:12px}
.footer-brand .desc{font-size:13px;line-height:1.6;color:rgba(255,255,255,0.6);max-width:300px}
.footer-col h4{color:#fff;font-size:12px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;margin-bottom:16px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,0.65);transition:color .2s}
.footer-col a:hover{color:var(--orange-l)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.10);padding-top:20px;
  display:flex;justify-content:space-between;align-items:center;
  font-size:12px;color:rgba(255,255,255,0.5);flex-wrap:wrap;gap:12px;
}
.footer-bottom .legal{display:flex;gap:20px}

/* ========== ANIMATIONS ========== */
.reveal{opacity:0;transform:translateY(24px);transition:all .8s cubic-bezier(.25,.46,.45,.94)}
.reveal.in{opacity:1;transform:translateY(0)}

/* ========== RESPONSIVE ========== */
@media (max-width:900px){
  section{padding:64px 0}
  .container{padding:0 24px}
  .nav-menu{display:none}
  .hero-content{grid-template-columns:1fr;padding:0 24px;text-align:center;gap:20px}
  .hero-visual{order:-1}
  .hero-img-wrap{width:240px;height:240px}
  .industry-stats{grid-template-columns:repeat(2,1fr)}
  .ready-grid{grid-template-columns:1fr}
  .capability-grid{grid-template-columns:repeat(2,1fr)}
  .capacity-stats{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}

/* ========== FACTORY FILM ========== */
.film{background:var(--bg)}
.film-head{max-width:880px}
.film-stage{margin:0}
.film-frame{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  background:#0a0a0a;box-shadow:var(--shadow-lg);
  padding-bottom:56.25%;height:0;
}
.film-video{
  position:absolute;top:0;left:0;width:100%;height:100%;
  display:block;object-fit:cover;background:#0a0a0a;
}
.film-cover{
  position:absolute;top:0;left:0;width:100%;height:100%;
  border:0;padding:0;margin:0;background:transparent;cursor:pointer;
  font-family:inherit;color:#fff;text-align:left;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .45s ease,visibility .45s ease;
}
.film-cover.is-hidden{opacity:0;visibility:hidden;pointer-events:none}
.film-scrim{
  position:absolute;top:0;left:0;width:100%;height:100%;
  background:linear-gradient(to top,rgba(0,0,0,.74) 0%,rgba(0,0,0,.10) 46%,rgba(0,0,0,.32) 100%);
}
.film-play{
  position:relative;width:96px;height:96px;border-radius:50%;flex:0 0 auto;
  background:rgba(255,255,255,.95);color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 14px 44px rgba(0,0,0,.38);
  transition:transform .32s cubic-bezier(.25,.46,.45,.94),background .25s ease;
}
.film-play svg{display:block;margin-left:5px}
.film-cover:hover .film-play{transform:scale(1.09);background:#fff}
.film-caption{
  position:absolute;left:40px;right:40px;bottom:34px;
  display:flex;flex-direction:column;gap:7px;
}
.film-caption-title{font-size:26px;font-weight:800;letter-spacing:-0.02em;line-height:1.1}
.film-caption-meta{
  font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.70);
}
.film-foot{
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  margin-top:16px;font-size:13px;color:var(--gray-2);
}
@media (max-width:900px){
  .film-play{width:70px;height:70px}
  .film-play svg{width:22px;height:22px}
  .film-caption{left:22px;right:22px;bottom:20px;gap:5px}
  .film-caption-title{font-size:18px}
  .film-caption-meta{font-size:10px;letter-spacing:.12em}
  .film-foot{font-size:12px;margin-top:12px}
}