/* ===================== EnLoop · official site ===================== */
:root{
  --primary:#4F46E5;       /* 静蓝主色（与 App AccentColor 一致） */
  --primary-deep:#3730A3;
  --primary-soft:#EEF0FE;
  --accent:#14B8A6;        /* 薄荷辅助 */
  --success:#22C55E;
  --warning:#F59E0B;
  --danger:#EF4444;
  --ink:#0E1116;
  --ink-2:#3a4151;
  --ink-3:#6b7280;
  --line:#e7e8ef;
  --bg:#ffffff;
  --bg-soft:#f6f7fb;
  --bg-soft-2:#f0f1f8;
  --radius:22px;
  --radius-sm:14px;
  --shadow-sm:0 1px 2px rgba(16,17,22,.05), 0 8px 24px rgba(16,17,22,.06);
  --shadow-md:0 10px 40px rgba(40,38,90,.12);
  --shadow-lg:0 30px 80px rgba(40,38,90,.22);
  --maxw:1160px;
  --font:"Inter","SF Pro Text",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;line-height:1.6;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3{margin:0;line-height:1.12;letter-spacing:-.02em}

/* screenshot set: default = English shots; zh langs swap to zh shots.
   Use [data-shot] (2-specificity) so it beats `.g-frame img{display:block}`. */
body[data-shot="en"] .shot-zh{display:none}
body[data-shot="zh"] .shot-en{display:none}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:600;border-radius:999px;
  border:1px solid transparent;cursor:pointer;transition:transform .15s ease, box-shadow .2s ease, background .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:.5rem .95rem;font-size:.9rem}
.btn-lg{padding:.85rem 1.5rem;font-size:1.02rem}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 22px rgba(79,70,229,.32)}
.btn-primary:hover{background:var(--primary-deep);box-shadow:0 12px 30px rgba(79,70,229,.42)}
.btn-ghost{background:rgba(255,255,255,.7);border-color:var(--line);color:var(--ink);backdrop-filter:blur(8px)}
.btn-ghost:hover{background:#fff;box-shadow:var(--shadow-sm)}
.btn-light{background:#fff;color:var(--primary-deep);box-shadow:0 10px 30px rgba(0,0,0,.18)}
.btn-light:hover{transform:translateY(-2px)}

/* ============ nav ============ */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid rgba(231,232,239,.7)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:.7rem 1.4rem;display:flex;align-items:center;gap:1.2rem}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:800}
.brand-logo{width:34px;height:34px;border-radius:9px;object-fit:cover;box-shadow:var(--shadow-sm)}
.brand-name{font-size:1.18rem;letter-spacing:-.02em}
.nav-links{display:flex;gap:1.6rem;margin-left:1.2rem}
.nav-links a{color:var(--ink-2);font-weight:500;font-size:.96rem;transition:color .15s}
.nav-links a:hover{color:var(--primary)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:.7rem}
.lang-picker{position:relative;display:flex;align-items:center;gap:.35rem;background:var(--bg-soft);
  border:1px solid var(--line);border-radius:999px;padding:.3rem .55rem .3rem .7rem;color:var(--ink-2);transition:.15s}
.lang-picker:hover{color:var(--primary);border-color:var(--primary)}
.lang-globe{flex:none;opacity:.8}
.lang-picker select{appearance:none;-webkit-appearance:none;background:transparent;border:0;outline:none;
  font-family:inherit;font-weight:600;font-size:.88rem;color:inherit;cursor:pointer;padding-right:.9rem}
.lang-picker::after{content:"▾";position:absolute;right:.55rem;pointer-events:none;color:var(--ink-3);font-size:.7rem}

/* ============ hero (full-bleed welcome video background) ============ */
.hero{position:relative;overflow:hidden;min-height:90vh;display:flex;align-items:center;
  padding:6rem 1.4rem 5rem}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;background:#0b1226}
.hero-scrim{position:absolute;inset:0;z-index:1;background:
   linear-gradient(90deg, rgba(7,8,24,.90) 0%, rgba(7,8,24,.66) 40%, rgba(7,8,24,.30) 68%, rgba(7,8,24,.50) 100%),
   linear-gradient(180deg, rgba(7,8,24,.45) 0%, rgba(7,8,24,.30) 35%, rgba(7,8,24,.62) 100%)}
.hero-inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;width:100%}
.hero-copy{max-width:640px}
.badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.13);
  border:1px solid rgba(255,255,255,.28);color:#fff;font-weight:600;font-size:.86rem;
  padding:.42rem .9rem;border-radius:999px;backdrop-filter:blur(8px)}
.badge .dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.25)}
.hero-title{font-size:clamp(2.5rem,5.4vw,4rem);font-weight:900;margin:1.1rem 0 1.1rem;letter-spacing:-.03em;color:#fff;
  text-shadow:0 2px 30px rgba(0,0,0,.35)}
.grad{background:linear-gradient(100deg,#a5b4fc 10%,#5eead4 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.14rem;color:rgba(255,255,255,.92);max-width:44ch;margin:0 0 1.8rem;
  text-shadow:0 1px 16px rgba(0,0,0,.3)}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap}
.hero .btn-ghost{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.32);color:#fff;backdrop-filter:blur(8px)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.26);box-shadow:none}
.hero-foot{margin-top:1.3rem;color:rgba(255,255,255,.74);font-size:.9rem}
/* sound toggle pinned to the hero corner (reuses .film-sound visual) */
.hero-sound{position:absolute;right:20px;bottom:20px;left:auto;z-index:3}

/* ============ stats strip ============ */
.stats{background:var(--ink);color:#fff}
.stats-inner{max-width:var(--maxw);margin:0 auto;padding:1.6rem 1.4rem;display:flex;
  justify-content:space-between;gap:1rem;flex-wrap:wrap}
.stat{flex:1;min-width:120px;text-align:center}
.stat-num{font-size:1.9rem;font-weight:900;letter-spacing:-.02em;
  background:linear-gradient(120deg,#fff,#c7c9ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-label{font-size:.85rem;color:#a6a8c4;margin-top:.15rem}

/* ============ brand film ============ */
.film-stage{position:relative;max-width:920px;margin:0 auto;border-radius:28px;overflow:hidden;
  box-shadow:var(--shadow-lg);background:#0b0b0f;line-height:0;
  border:1px solid rgba(0,0,0,.06)}
.film-video{width:100%;height:auto;display:block;border-radius:28px}
.film-sound{position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:.45rem;
  background:rgba(11,11,15,.55);color:#fff;border:1px solid rgba(255,255,255,.28);border-radius:999px;
  padding:.5rem .9rem;font-family:var(--font);font-weight:600;font-size:.9rem;cursor:pointer;
  backdrop-filter:blur(8px);transition:background .15s, transform .15s;line-height:1}
.film-sound:hover{background:rgba(11,11,15,.75);transform:translateY(-1px)}
.film-sound .snd-ico{font-size:1rem}
.film-sound.is-on .snd-label{display:none}
.film-sound.is-on{background:var(--primary);border-color:var(--primary)}

/* ============ section base ============ */
.section{max-width:var(--maxw);margin:0 auto;padding:5.5rem 1.4rem}
.section-head{text-align:center;max-width:680px;margin:0 auto 3rem}
.eyebrow{display:inline-block;font-weight:800;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--primary);background:var(--primary-soft);padding:.32rem .8rem;border-radius:999px;margin-bottom:1rem}
.eyebrow.light{color:#fff;background:rgba(255,255,255,.16)}
.section-head h2{font-size:clamp(1.8rem,3.6vw,2.5rem);font-weight:850}
.section-lead{color:var(--ink-2);font-size:1.08rem;margin-top:.9rem}

/* ============ loop flow ============ */
.loop-flow{display:flex;align-items:stretch;justify-content:center;flex-wrap:wrap;gap:.6rem}
.loop-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:1rem .95rem;
  width:150px;text-align:center;box-shadow:var(--shadow-sm);transition:transform .18s, box-shadow .18s}
.loop-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.loop-step.accent{border-color:var(--primary);background:linear-gradient(180deg,#fff,var(--primary-soft));
  box-shadow:0 12px 30px rgba(79,70,229,.18)}
.loop-ico{font-size:1.5rem;display:block;margin-bottom:.4rem}
.loop-step b{display:block;font-size:.95rem;margin-bottom:.2rem}
.loop-step i{font-style:normal;font-size:.78rem;color:var(--ink-3);line-height:1.35}
.loop-arrow{display:flex;align-items:center;color:var(--ink-3);font-size:1.3rem;font-weight:700}
.loop-arrow-loop{color:var(--accent)}

/* ============ features ============ */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.feat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;
  box-shadow:var(--shadow-sm);transition:transform .18s, box-shadow .18s, border-color .18s}
.feat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:#dcdcef}
.feat-hot{border-color:var(--primary);background:linear-gradient(180deg,#fff, #fbfbff);
  box-shadow:0 16px 44px rgba(79,70,229,.16)}
.feat-ico{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;margin-bottom:1rem;background:color-mix(in srgb, var(--c) 14%, #fff);
  box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--c) 28%, #fff)}
.feat-card h3{font-size:1.18rem;font-weight:800;margin-bottom:.5rem}
.feat-card p{color:var(--ink-2);font-size:.96rem;margin:0 0 .9rem}
.feat-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem}
.feat-list li{position:relative;padding-left:1.4rem;color:var(--ink-2);font-size:.88rem}
.feat-list li::before{content:"";position:absolute;left:0;top:.5em;width:7px;height:7px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}

/* ============ gallery ============ */
.gallery-rail{display:flex;gap:1.3rem;overflow-x:auto;padding:1rem .4rem 2rem;scroll-snap-type:x mandatory;
  scrollbar-width:thin}
.gallery-rail::-webkit-scrollbar{height:8px}
.gallery-rail::-webkit-scrollbar-thumb{background:#d6d7e6;border-radius:99px}
.g-item{scroll-snap-align:center;flex:0 0 auto;text-align:center}
.g-frame{width:230px;border-radius:34px;background:#0b0b0f;padding:9px;box-shadow:var(--shadow-md);
  position:relative;border:1px solid #1c1c22}
.g-frame img{width:100%;border-radius:26px;display:block}
.g-cap{margin-top:.8rem;font-weight:600;font-size:.92rem;color:var(--ink-2)}

/* ============ privacy ============ */
.privacy{max-width:none;padding:0;margin-top:1rem}
.privacy-inner{background:
   radial-gradient(700px 400px at 8% 0%, rgba(255,255,255,.18), transparent 55%),
   linear-gradient(135deg,var(--primary-deep),var(--primary) 55%, #5b53ea);
  color:#fff;padding:5rem 1.4rem;text-align:center}
.privacy-copy{max-width:760px;margin:0 auto}
.privacy-copy h2{font-size:clamp(1.9rem,3.8vw,2.6rem);font-weight:850;margin:.4rem 0 1rem}
.privacy-copy p{color:rgba(255,255,255,.9);font-size:1.1rem}
.privacy-points{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;margin-top:2rem}
.pp{display:flex;align-items:center;gap:.55rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  padding:.7rem 1.1rem;border-radius:999px;font-weight:600;backdrop-filter:blur(6px)}
.pp span{font-size:1.05rem}
.privacy-more{margin-top:2rem}

/* ============ legal / privacy policy page ============ */
.legal{max-width:820px;margin:0 auto;padding:7rem 1.4rem 4rem}
.legal-head{margin-bottom:2.2rem}
.legal-head h1{font-size:clamp(2rem,4.4vw,2.8rem);font-weight:850;letter-spacing:-.02em}
.legal-updated{color:var(--ink-3);font-size:.92rem;margin-top:.6rem}
.legal-tldr{background:var(--primary-soft);border:1px solid #dfe0fb;border-radius:var(--radius);
  padding:1.3rem 1.4rem;margin-bottom:2.4rem;color:var(--ink);font-size:1.02rem;line-height:1.7}
.legal h2{font-size:1.28rem;font-weight:800;margin:2.2rem 0 .6rem;letter-spacing:-.01em}
.legal p{color:var(--ink-2);font-size:1.0rem;line-height:1.75;margin:.2rem 0 .6rem}
.legal a{color:var(--primary);font-weight:600}
.legal-back{display:inline-flex;align-items:center;gap:.4rem;margin-bottom:1.4rem;color:var(--ink-2);font-weight:600}
.legal-back:hover{color:var(--primary)}

/* ============ tech ============ */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.9rem}
.tech-pill{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1rem 1.1rem;
  transition:transform .15s, box-shadow .15s, background .15s}
.tech-pill:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);background:#fff}
.tech-pill b{display:block;font-size:1rem;color:var(--ink)}
.tech-pill span{font-size:.84rem;color:var(--ink-3)}

/* ============ download ============ */
.download{padding-top:2rem}
.download-card{position:relative;overflow:hidden;text-align:center;border-radius:34px;padding:4rem 1.6rem;
  background:
   radial-gradient(600px 300px at 80% -10%, rgba(20,184,166,.35), transparent 60%),
   linear-gradient(135deg,#1c1b3a, #2a2766 60%, var(--primary));
  color:#fff;box-shadow:var(--shadow-lg)}
.download-mascot{width:88px;height:88px;border-radius:22px;margin:0 auto 1.2rem;border:3px solid rgba(255,255,255,.6);box-shadow:var(--shadow-md)}
.download-card h2{font-size:clamp(1.8rem,3.6vw,2.5rem);font-weight:850;max-width:18ch;margin:0 auto .9rem}
.download-card p{color:rgba(255,255,255,.88);font-size:1.05rem;max-width:50ch;margin:0 auto 1.8rem}
.download-note{font-size:.85rem;color:rgba(255,255,255,.6);margin-top:1.1rem}

/* ============ footer ============ */
.footer{background:var(--bg-soft);border-top:1px solid var(--line)}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:2.2rem 1.4rem;display:flex;align-items:center;
  gap:1.4rem;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:.7rem}
.footer-tag{font-size:.82rem;color:var(--ink-3)}
.footer-links{display:flex;gap:1.4rem;margin-left:1rem}
.footer-links a{color:var(--ink-2);font-size:.92rem}
.footer-links a:hover{color:var(--primary)}
.footer-meta{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:.2rem;
  color:var(--ink-3);font-size:.84rem}

/* ============ responsive ============ */
@media (max-width:980px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:620px){
  .hero{min-height:84vh;padding:4.5rem 1.1rem 3.5rem}
  .hero-title{font-size:clamp(2.1rem,8vw,2.7rem)}
  .section{padding:4rem 1.1rem}
  .feat-grid{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:1fr}
  .stats-inner{gap:1.2rem}
  .stat{min-width:40%}
  .footer-meta{margin-left:0;align-items:flex-start}
}