/* ==================== 渐隐蒙版的最外层框架 ==================== */
#new-feature-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  background-color: #ffffff; /* 确保背景色为纯白，防止被底层页面透出来 */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1), 
              visibility 0.5s;

  /* ==================== CSS 变量定义范围 ==================== */
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-head: "Plus Jakarta Sans", system-ui, sans-serif;

  --accent: #7C3AED;
  --accent-deep: color-mix(in oklab, var(--accent) 78%, #000);
  --accent-soft: color-mix(in oklab, var(--accent) 12%, #fff);
  --accent-tint: color-mix(in oklab, var(--accent) 7%, #fff);
  --accent-on:  #fff;

  --ink:   #16131f;
  --ink-2: #534f60;
  --ink-3: #8b8794;

  --bg:      #ffffff;
  --surface: #ffffff;
  --tint:    color-mix(in oklab, var(--accent) 4%, #fff);
  --line:    color-mix(in oklab, var(--accent) 14%, #fff);
  --line-2:  color-mix(in oklab, var(--ink) 9%, #fff);

  /* minimal direction overrides (hardcoded) */
  --tint:    color-mix(in oklab, var(--accent) 4%, #fff);
  --line:    color-mix(in oklab, var(--ink) 10%, #fff);
  --radius: 14px;
  --shadow: 0 16px 40px -30px rgba(22,19,31,.4);
  --shadow-lg: 0 30px 70px -42px rgba(22,19,31,.45);

  --radius-sm: calc(var(--radius) * 0.6);
  --radius-lg: calc(var(--radius) * 1.4);
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(22,19,31,.05), 0 1px 0 rgba(22,19,31,.02);

  --maxw: 1180px;
  --sect-pad: 104px;
  --gap: 28px;

  --t: 220ms cubic-bezier(.4,0,.2,1);

  /* 基础重置行为 */
  overflow-x: hidden;
  background: var(--bg); 
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased; 
  text-rendering: optimizeLegibility;
  line-height: 1.55;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

#new-feature-mask.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* ==================== 100% 显式命名空间选择器（保证完美兼容各版本浏览器） ==================== */

#new-feature-mask * { box-sizing: border-box; }
#new-feature-mask h1,
#new-feature-mask h2,
#new-feature-mask h3,
#new-feature-mask h4 { font-family: var(--font-head); margin:0; line-height:1.1; letter-spacing:-.02em; }
#new-feature-mask p { margin:0; }
#new-feature-mask a { color: inherit; text-decoration: none; }
#new-feature-mask img { max-width:100%; display:block; }
#new-feature-mask .wrap { max-width: var(--maxw); margin:0 auto; padding:0 32px; }
#new-feature-mask .accent { color: var(--accent); }

#new-feature-mask .eyebrow {
  display:inline-block; font-size:.78rem; font-weight:600; letter-spacing:.04em;
  color: var(--accent); background: var(--accent-soft);
  padding:6px 13px; border-radius: var(--radius-pill); margin-bottom:18px;
  white-space: nowrap;
}
#new-feature-mask .section__title { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight:800; }
#new-feature-mask .section__sub { color: var(--ink-2); margin-top:12px; font-size:1.02rem; }

/* ---------- Buttons ---------- */
#new-feature-mask .btn {
  --b-bg: var(--accent); --b-fg: var(--accent-on);
  display:inline-flex; align-items:center; gap:8px; cursor:pointer;
  font-family: var(--font-body); font-weight:600; font-size:.95rem;
  border:none; border-radius: var(--radius); padding:12px 20px;
  background: var(--b-bg); color: var(--b-fg);
  transition: transform var(--t), box-shadow var(--t), background var(--t);
  box-shadow: 0 10px 24px -12px color-mix(in oklab, var(--accent) 60%, transparent);
}
#new-feature-mask .btn--primary { background: var(--accent); }
#new-feature-mask .btn--dark { background:#111; color:#fff; box-shadow:0 10px 24px -12px rgba(0,0,0,.3); }
#new-feature-mask .hero__img-link { display:block; }
#new-feature-mask .hero__img-link:hover .hero__img { transform:translateY(-8px) scale(1.02); box-shadow:0 36px 80px rgba(100,60,200,.26) !important; }
#new-feature-mask .btn--primary:hover { background: var(--accent-deep); transform: translateY(-2px);
  box-shadow: 0 16px 30px -12px color-mix(in oklab, var(--accent) 65%, transparent); }
#new-feature-mask .btn--primary:active { transform: translateY(0); }
#new-feature-mask .btn--ghost {
  background: transparent; color: var(--ink); box-shadow:none;
  border:1px solid var(--line-2);
}
#new-feature-mask .btn--ghost:hover { background: var(--tint); transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }
#new-feature-mask .btn--lg { padding:15px 26px; font-size:1rem; }
#new-feature-mask .btn--sm { padding:9px 16px; font-size:.88rem; }
#new-feature-mask .btn .arr { transition: transform var(--t); }
#new-feature-mask .btn:hover .arr { transform: translateX(3px); }
#new-feature-mask .btn .chev { transition: transform var(--t); }
#new-feature-mask .btn[aria-expanded="true"] .chev { transform: rotate(180deg); }

/* ============ NAV ============ */
#new-feature-mask .nav {
  position: sticky; top:0; z-index:50;
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom:1px solid color-mix(in oklab, var(--ink) 6%, transparent);
}
#new-feature-mask .nav__inner {
  max-width: var(--maxw); margin:0 auto; padding:14px 32px;
  display:flex; align-items:center; gap:28px;
}
#new-feature-mask .brand { display:flex; align-items:center; gap:10px; font-weight:800; font-size:1.18rem; letter-spacing:-.02em; }
#new-feature-mask .brand__mark {
  width:34px; height:34px; border-radius:10px; display:grid; place-items:center;
  background: linear-gradient(155deg, #232327, #050506);
  color:#fff; font-weight:800; font-size:1rem;
  box-shadow: 0 6px 16px -8px rgba(10,10,14,.6), inset 0 1px 0 rgba(255,255,255,.14);
  flex-shrink:0;
}
#new-feature-mask .brand__mark--sm { width:22px; height:22px; border-radius:7px; font-size:.7rem; }
#new-feature-mask .brand__dot { color: var(--accent); }
#new-feature-mask .nav__links { display:flex; flex:1; justify-content:center; gap:30px; margin-left:8px; }
#new-feature-mask .nav__links a { display:inline-flex; align-items:center; gap:5px; white-space:nowrap; font-size:.95rem; font-weight:600; color: var(--ink); position:relative; padding:6px 0; transition: color var(--t); }
#new-feature-mask .navchev { opacity:.55; margin-top:1px; }
#new-feature-mask .nav__links a:hover { color: var(--accent); }
#new-feature-mask .nav__links a.is-active { color: var(--accent); font-weight:600; }
#new-feature-mask .nav__links a.is-active::after {
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background: var(--accent); border-radius:2px;
}
#new-feature-mask .nav__right { margin-left:auto; display:flex; align-items:center; gap:14px; }
#new-feature-mask .nav__burger { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px; }
#new-feature-mask .nav__burger span { width:22px; height:2px; background: var(--ink); border-radius:2px; transition: var(--t); }
#new-feature-mask .nav__mobile { display:none; flex-direction:column; padding:8px 32px 16px; gap:4px; border-top:1px solid var(--line); }
#new-feature-mask .nav__mobile a { padding:11px 6px; font-weight:500; color:var(--ink-2); border-radius:8px; }
#new-feature-mask .nav__mobile a:hover { background: var(--tint); color: var(--ink); }
#new-feature-mask .nav__mobile.open { display:flex; }

/* ============ HERO ============ */
#new-feature-mask .hero {
  position:relative; overflow:hidden;
  padding: 84px 0 96px;
  background:
    radial-gradient(46% 42% at 84% 6%, color-mix(in oklab, var(--accent) 26%, #fff), transparent 60%),
    radial-gradient(38% 40% at 98% 58%, color-mix(in oklab, var(--accent) 16%, #fff), transparent 62%),
    radial-gradient(54% 50% at 4% 98%, color-mix(in oklab, var(--accent) 9%, #fff), transparent 60%),
    linear-gradient(180deg, var(--accent-tint), var(--bg) 72%);
}
#new-feature-mask .hero::before { content:""; position:absolute; inset:0; z-index:0; pointer-events:none;
  background-image: radial-gradient(color-mix(in oklab, var(--accent) 42%, transparent) 1.5px, transparent 1.9px);
  background-size: 22px 22px;
  -webkit-mask: radial-gradient(72% 64% at 78% 24%, #000, transparent 76%);
  mask: radial-gradient(72% 64% at 78% 24%, #000, transparent 76%);
  opacity:.7; }
#new-feature-mask .hero__inner { position:relative; z-index:1; display:grid; grid-template-columns: 1.05fr 1fr; gap:56px; align-items:center; }
#new-feature-mask .hero__inner > * { min-width: 0; }
#new-feature-mask .hero__title { font-size: clamp(2.6rem, 5vw, 4.1rem); font-weight:800; letter-spacing:-.03em; }
#new-feature-mask .hero__sub { margin-top:22px; max-width:30rem; color: var(--ink-2); font-size:1.12rem; }
#new-feature-mask .hero__cta { margin-top:32px; display:flex; gap:14px; flex-wrap:wrap; }
#new-feature-mask .why { margin-top:24px; display:grid; gap:12px; max-width:30rem;
  animation: fade .3s ease; }
#new-feature-mask .why__item { display:flex; gap:11px; align-items:flex-start; color: var(--ink-2); font-size:.96rem; }
#new-feature-mask .why__item strong { color: var(--ink); }
#new-feature-mask .why__dot { width:8px; height:8px; border-radius:50%; background: var(--accent); margin-top:8px; flex:none; }
#new-feature-mask .hero::after { content:""; position:absolute; bottom:0; left:0; right:0; height:100px; z-index:2; pointer-events:none;
  background: linear-gradient(to bottom, transparent, var(--bg)); }

/* App mockup */
#new-feature-mask .hero__art { position:relative; }
#new-feature-mask .hero__art::before { content:""; position:absolute; z-index:0; inset:-8% -10% -12% -6%; pointer-events:none;
  background: radial-gradient(58% 52% at 72% 32%, color-mix(in oklab, var(--accent) 34%, transparent), transparent 70%);
  filter: blur(40px); opacity:.65; }
#new-feature-mask .appwin {
  position:relative; z-index:2;
  display:grid; grid-template-columns: 64px 1fr;
  background: linear-gradient(168deg, #fff, color-mix(in oklab, var(--accent) 4%, #fff));
  border-radius: var(--radius-lg); overflow:hidden;
  border:1px solid color-mix(in oklab, var(--accent) 15%, #fff);
  box-shadow:
    var(--shadow-lg),
    0 2px 6px -2px color-mix(in oklab, var(--accent) 22%, transparent),
    inset 0 1px 0 rgba(255,255,255,.9),
    inset 0 0 0 1px rgba(255,255,255,.45);
}
#new-feature-mask .appwin::after { content:""; position:absolute; inset:0; z-index:6; pointer-events:none; border-radius: inherit;
  background: linear-gradient(133deg, rgba(255,255,255,.42) 0%, rgba(255,255,255,0) 26%, rgba(255,255,255,0) 80%, rgba(255,255,255,.22) 100%); }
#new-feature-mask .appwin__side { background: var(--tint); padding:14px 0; display:flex; flex-direction:column; align-items:center; gap:13px; border-right:1px solid var(--line); }
#new-feature-mask .appwin__logo { margin-bottom:6px; }
#new-feature-mask .sb { width:26px; height:6px; border-radius:3px; background: color-mix(in oklab, var(--accent) 22%, #fff); }
#new-feature-mask .sb--on { width:30px; background: var(--accent); }
#new-feature-mask .appwin__main { padding:18px 20px 22px; }
#new-feature-mask .appwin__bar { display:flex; justify-content:flex-end; margin-bottom:14px; }
#new-feature-mask .appwin__search { width:46%; height:30px; border-radius:9px; background: var(--tint); border:1px solid var(--line); }
#new-feature-mask .appwin__hi { font-family: var(--font-head); font-weight:800; font-size:1.25rem; }
#new-feature-mask .appwin__q { color: var(--ink-3); font-size:.82rem; margin-top:2px; margin-bottom:14px; }
#new-feature-mask .appwin__cols { display:grid; grid-template-columns: 1.15fr 1fr; gap:12px; }
#new-feature-mask .appwin__tiles { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
#new-feature-mask .tile { background: var(--surface); border:1px solid var(--line); border-radius: var(--radius-sm); padding:11px; display:flex; flex-direction:column; gap:2px; }
#new-feature-mask .tile__ic { font-size:1.1rem; }
#new-feature-mask .tile__t { font-weight:700; font-size:.78rem; }
#new-feature-mask .tile__s { color: var(--ink-3); font-size:.64rem; }
#new-feature-mask .panel { background: linear-gradient(165deg, var(--accent-soft), var(--surface)); border:1px solid var(--line); border-radius: var(--radius-sm); padding:13px; display:flex; flex-direction:column; gap:9px; }
#new-feature-mask .panel__h { font-weight:700; font-size:.74rem; }
#new-feature-mask .panel__row { display:flex; align-items:center; justify-content:space-between; gap:8px; font-size:.66rem; color: var(--ink-2); }
#new-feature-mask .panel__row .bar { flex:1; height:5px; border-radius:3px; background: color-mix(in oklab, var(--accent) 14%, #fff); overflow:hidden; }
#new-feature-mask .panel__row .bar i { display:block; height:100%; background: var(--accent); border-radius:3px; }
#new-feature-mask .panel__ring { display:flex; align-items:center; gap:9px; margin-top:2px; }
#new-feature-mask .ring { --p:80; width:42px; height:42px; border-radius:50%; display:grid; place-items:center;
  background: conic-gradient(var(--accent) calc(var(--p)*1%), color-mix(in oklab,var(--accent) 15%,#fff) 0); }
#new-feature-mask .ring span { width:30px; height:30px; border-radius:50%; background: var(--surface); display:grid; place-items:center; font-size:.6rem; font-weight:800; }
#new-feature-mask .panel__keep { font-size:.68rem; font-weight:600; color: var(--accent); }

/* Floating chips */
#new-feature-mask .floaty { position:absolute; z-index:3; width:54px; height:54px; border-radius:17px;
  display:grid; place-items:center; color: var(--accent);
  background: linear-gradient(152deg, rgba(255,255,255,.82), rgba(255,255,255,.5));
  -webkit-backdrop-filter: blur(16px) saturate(1.5); backdrop-filter: blur(16px) saturate(1.5);
  border:1px solid rgba(255,255,255,.8);
  box-shadow:
    0 20px 38px -14px color-mix(in oklab, var(--accent) 44%, transparent),
    inset 0 1px 0 rgba(255,255,255,.95),
    inset 0 0 0 1px rgba(255,255,255,.32);
}
#new-feature-mask .floaty svg { filter: drop-shadow(0 1px 1.5px rgba(80,40,140,.18)); }
#new-feature-mask .floaty--bot { top:-24px; left:120px; color:#fff;
  background: linear-gradient(150deg, var(--accent), var(--accent-deep));
  border-color: color-mix(in oklab, var(--accent) 38%, #fff);
  box-shadow: 0 22px 40px -14px color-mix(in oklab, var(--accent) 60%, transparent), inset 0 1px 0 rgba(255,255,255,.4); }
#new-feature-mask .floaty--bot svg { filter: drop-shadow(0 1px 2px rgba(40,15,90,.35)); }
#new-feature-mask .floaty--cap { top:-16px; right:-12px;
  background: linear-gradient(150deg, rgba(255,255,255,.85), color-mix(in oklab, var(--accent) 16%, rgba(255,255,255,.55))); }
#new-feature-mask .floaty--bar { bottom:48px; right:-24px; }

/* ============ SECTIONS ============ */
#new-feature-mask .section { padding: var(--sect-pad) 0; overflow:hidden; }
#new-feature-mask #positions { overflow:hidden; }
#new-feature-mask .section--tint { background: var(--tint); }
#new-feature-mask #voices { position:relative; overflow:hidden;
  background: linear-gradient(180deg, var(--bg) 0%, color-mix(in oklab, var(--accent) 5%, #fff) 24%, color-mix(in oklab, var(--accent) 6%, #fff) 76%, var(--bg) 100%); }
#new-feature-mask #voices::before { content:""; position:absolute; z-index:0; width:580px; height:580px; right:-180px; top:-220px; border-radius:50%; pointer-events:none;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent) 17%, transparent), transparent 70%); filter: blur(60px); }
#new-feature-mask #voices::after { content:""; position:absolute; z-index:0; width:540px; height:540px; left:-200px; bottom:-240px; border-radius:50%; pointer-events:none;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent) 10%, transparent), transparent 70%); filter: blur(60px); }
#new-feature-mask #voices > .wrap { position:relative; z-index:1; }
#new-feature-mask #positions {
  background:
    radial-gradient(72% 55% at 100% -8%, var(--accent-tint), transparent 60%),
    radial-gradient(64% 52% at -8% 108%, color-mix(in oklab, var(--accent) 7%, #fff), transparent 58%),
    var(--bg);
}

/* Roles */
#new-feature-mask #positions { padding-top: 56px; padding-bottom: 72px; }
#new-feature-mask .roles { display:grid; grid-template-columns:1fr 1fr; gap: var(--gap); margin-top:28px; }
#new-feature-mask .roles > * { min-width: 0; }
#new-feature-mask .role {
  display:grid; grid-template-columns: 1fr minmax(190px, 232px);
  gap:18px; align-items:center;
  background: linear-gradient(165deg, rgba(255,255,255,.74), rgba(255,255,255,.52));
  -webkit-backdrop-filter: blur(22px) saturate(1.5); backdrop-filter: blur(22px) saturate(1.5);
  border:1px solid rgba(255,255,255,.78); border-radius: var(--radius-lg);
  padding:20px 30px 40px 30px;
  box-shadow: 0 2px 10px -6px color-mix(in oklab, var(--accent) 14%, transparent), 0 34px 66px -40px color-mix(in oklab, var(--accent) 26%, transparent), inset 0 1px 0 rgba(255,255,255,.5);
  transition: transform var(--t), box-shadow var(--t);
}
#new-feature-mask .role:hover { transform: translateY(-5px);
  box-shadow: 0 6px 22px -12px color-mix(in oklab, var(--accent) 14%, transparent), 0 52px 92px -50px color-mix(in oklab, var(--accent) 28%, transparent), inset 0 1px 0 rgba(255,255,255,.5); }
#new-feature-mask .role__body { display:flex; flex-direction:column; align-items:center; text-align:center; justify-content:center; height:100%; }
#new-feature-mask .role__body .btn { margin-top:52px; }

#new-feature-mask .role__ic { width:46px; height:46px; border-radius:13px; display:grid; place-items:center;
  background: var(--accent-soft); color: var(--accent); margin-bottom:14px; }
#new-feature-mask .role__title { font-size:1.32rem; font-weight:800; height:3.8em; display:flex; align-items:flex-start; }
#new-feature-mask .role__desc { color: var(--ink-2); margin-top:10px; font-size:1.08rem; }
#new-feature-mask .checks { list-style:none; padding:0; margin:18px 0 22px; display:grid; gap:10px; }
#new-feature-mask .checks li { position:relative; padding-left:26px; font-size:.9rem; color: var(--ink-2); }
#new-feature-mask .checks li::before {
  content:""; position:absolute; left:0; top:1px; width:17px; height:17px; border-radius:50%;
  background: var(--accent-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 12l4 4 10-10' fill='none' stroke='%237C3AED' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size:11px; background-repeat:no-repeat; background-position:center;
}

/* Phone devices */
#new-feature-mask .role__art { display:flex; justify-content:center; }
#new-feature-mask .phone {
  position:relative; width:186px; aspect-ratio: 186/380;
  background: linear-gradient(155deg, #2c2836 0%, #16131c 46%, #09070f 100%);
  border-radius:42px; padding:7px;
  box-shadow:
    0 1px 2px rgba(0,0,0,.55),
    0 36px 66px -28px color-mix(in oklab, var(--accent) 50%, rgba(9,7,15,.7)),
    inset 0 0 0 1.5px rgba(255,255,255,.07),
    inset 0 1.5px 1px rgba(255,255,255,.18);
  transition: transform .5s cubic-bezier(.34,1.18,.4,1), box-shadow .5s ease;
}
#new-feature-mask .role:hover .phone { transform: translateY(-7px) rotate(-1.4deg);
  box-shadow: 0 1px 2px rgba(0,0,0,.55), 0 50px 86px -30px color-mix(in oklab, var(--accent) 60%, rgba(9,7,15,.7)), inset 0 0 0 1.5px rgba(255,255,255,.08), inset 0 1.5px 1px rgba(255,255,255,.2); }
#new-feature-mask .phone__notch { position:absolute; top:10px; left:50%; transform:translateX(-50%); width:36px; height:11px; border-radius:999px; background:#05030a; z-index:6;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06); }
#new-feature-mask .phone__notch::after { content:""; position:absolute; right:9px; top:50%; transform:translateY(-50%); width:6px; height:6px; border-radius:50%;
  background: radial-gradient(circle at 34% 34%, #4a4366, #0a0814); }

#new-feature-mask .phone--video .ph-clip, 
#new-feature-mask .phone--hw .hw { position:relative; width:100%; height:100%; border-radius:36px; overflow:hidden; }
#new-feature-mask .phone--video .ph-clip::before, 
#new-feature-mask .phone--hw .hw::before { content:none; }

/* UGC video phone */
#new-feature-mask .phone--video .ph-clip {
  background:
    radial-gradient(130% 78% at 16% 6%, color-mix(in oklab, var(--accent) 30%, #fff), transparent 56%),
    radial-gradient(120% 92% at 90% 96%, color-mix(in oklab, var(--accent) 64%, #5b21b6), transparent 52%),
    linear-gradient(162deg, color-mix(in oklab, var(--accent) 34%, #fff), color-mix(in oklab, var(--accent) 58%, #6d28d9));
  display:flex; flex-direction:column; align-items:center; justify-content:center; }
#new-feature-mask .ph-clip__label { position:absolute; top:16px; left:15px; display:inline-flex; align-items:center; gap:6px; z-index:4;
  font-family: ui-monospace, "SF Mono", monospace; font-size:.58rem; color:#fff; letter-spacing:.03em; opacity:.92; }
#new-feature-mask .ph-dot { width:6px; height:6px; border-radius:50%; background:#fff; box-shadow:0 0 0 3px rgba(255,255,255,.25); }
#new-feature-mask .ph-tiktok { position:absolute; top:14px; right:15px; font-size:1rem; color:#fff; opacity:.9; z-index:4; }
#new-feature-mask .ph-play { width:58px; height:58px; border-radius:50%; cursor:pointer; z-index:4;
  background: rgba(255,255,255,.22); -webkit-backdrop-filter: blur(10px) saturate(1.3); backdrop-filter: blur(10px) saturate(1.3);
  border:1px solid rgba(255,255,255,.55); color:#fff; display:grid; place-items:center;
  box-shadow: 0 12px 32px rgba(45,20,75,.28), inset 0 0 0 1px rgba(255,255,255,.18); transition: transform var(--t); }
#new-feature-mask .ph-play:hover { transform: scale(1.09); }
#new-feature-mask .ph-cap { position:absolute; bottom:58px; left:0; right:0; text-align:center; z-index:4;
  font-weight:800; font-size:.95rem; letter-spacing:-.01em; color:#fff; text-shadow:0 2px 14px rgba(45,20,75,.4); }
#new-feature-mask .ph-tag { position:absolute; bottom:18px; left:50%; transform:translateX(-50%); white-space:nowrap; z-index:7;
  background: rgba(255,255,255,.9); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  color: var(--ink); font-size:.64rem; font-weight:700; padding:6px 13px; border-radius: var(--radius-pill);
  box-shadow: 0 10px 24px -10px rgba(45,20,75,.5); border:1px solid rgba(255,255,255,.6); }
#new-feature-mask .ph-tag--right { left:auto; right:-20px; bottom:auto; top:60%; transform:none; }

/* Homework phone */
#new-feature-mask .phone--hw .hw { background: linear-gradient(180deg, #fff, #faf8ff); padding:18px 16px; display:flex; flex-direction:column; gap:9px; }
#new-feature-mask .hw__chip { align-self:flex-start; font-size:.58rem; font-weight:700; letter-spacing:.02em; color: var(--ink-3);
  background: color-mix(in oklab, var(--ink) 5%, #fff); padding:4px 11px; border-radius: var(--radius-pill); }
#new-feature-mask .hw__chip--sol { color: var(--accent); background: var(--accent-soft); margin-top:6px; }
#new-feature-mask .hw__q { font-size:.8rem; color: var(--ink-2); line-height:1.45; }
#new-feature-mask .hw__q em { font-style: normal; font-weight:800; color: var(--ink); }
#new-feature-mask .hw__steps { font-size:.88rem; color: var(--ink); display:grid; gap:7px; font-variant-numeric: tabular-nums; font-weight:600; }
#new-feature-mask .hw__steps strong { color: var(--accent); }
#new-feature-mask .hw__chart { margin-top:auto; color: var(--accent); }
#new-feature-mask .hw__chart svg { width:100%; height:58px; display:block; overflow:visible; }

/* ============ VOICES ============ */
#new-feature-mask .voices__head { display:flex; justify-content:space-between; align-items:flex-end; gap:20px; flex-wrap:wrap; }
#new-feature-mask .voices__nav { display:flex; align-items:center; gap:18px; }
#new-feature-mask .link-more { display:inline-flex; align-items:center; gap:6px; color: var(--accent); font-weight:600; font-size:.92rem; transition: gap var(--t); }
#new-feature-mask .link-more:hover { gap:10px; }
#new-feature-mask .caro__arrows { display:flex; gap:8px; }
#new-feature-mask .caro__arrow { width:40px; height:40px; border-radius:50%; border:1px solid var(--line-2);
  background: var(--surface); color: var(--ink); cursor:pointer; display:grid; place-items:center;
  transition: var(--t); }
#new-feature-mask .caro__arrow:hover { background: var(--accent); color:#fff; border-color: var(--accent); transform: translateY(-2px); }

#new-feature-mask .caro { margin-top:32px; overflow:hidden; padding:16px 0 46px; width:100%; }
#new-feature-mask .caro__track {
  display:flex; gap: var(--gap);
  width: max-content;
  animation: marquee 60s linear infinite;
}
#new-feature-mask .quote {
  flex: 0 0 clamp(280px, 30vw, 360px); margin:0;
  background: linear-gradient(165deg, rgba(255,255,255,.78), rgba(255,255,255,.55));
  -webkit-backdrop-filter: blur(20px) saturate(1.4); backdrop-filter: blur(20px) saturate(1.4);
  border:1px solid rgba(255,255,255,.78); border-radius: var(--radius-lg); padding:26px;
  box-shadow: 0 2px 10px -6px color-mix(in oklab, var(--accent) 14%, transparent), 0 34px 66px -40px color-mix(in oklab, var(--accent) 26%, transparent), inset 0 1px 0 rgba(255,255,255,.5);
  display:flex; flex-direction:column;
  transition: transform var(--t), box-shadow var(--t);
}
#new-feature-mask .quote:hover { transform: translateY(-5px);
  box-shadow: 0 6px 22px -12px color-mix(in oklab, var(--accent) 14%, transparent), 0 52px 92px -50px color-mix(in oklab, var(--accent) 28%, transparent), inset 0 1px 0 rgba(255,255,255,.5); }
#new-feature-mask .quote__top { display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; }
#new-feature-mask .ava { width:48px; height:48px; border-radius:50%; display:grid; place-items:center;
  font-weight:800; font-size:.95rem; color:#fff;
  background: linear-gradient(140deg, hsl(var(--h,265) 70% 62%), hsl(var(--h,265) 65% 48%)); }
#new-feature-mask .qmark { font-family: Georgia, serif; font-size:2.6rem; line-height:0; color: var(--accent); opacity:.5; }
#new-feature-mask .quote blockquote { margin:0; color: var(--ink); font-size:.97rem; line-height:1.6; }
#new-feature-mask .quote figcaption { margin-top:20px; display:flex; flex-direction:column; gap:2px; }
#new-feature-mask .quote figcaption strong { font-weight:700; }
#new-feature-mask .quote figcaption span { color: var(--ink-3); font-size:.84rem; }
#new-feature-mask .quote figcaption .term { color: var(--accent); font-weight:600; margin-top:6px; font-size:.8rem; }

#new-feature-mask .dots { display:flex; gap:8px; justify-content:center; margin-top:6px; }
#new-feature-mask .dots button { width:8px; height:8px; border-radius:50%; border:none; padding:0; cursor:pointer;
  background: color-mix(in oklab, var(--accent) 24%, #fff); transition: var(--t); }
#new-feature-mask .dots button.on { width:24px; border-radius:5px; background: var(--accent); }

/* ============ CTA ============ */
#new-feature-mask .cta { padding: clamp(56px, 7vw, 88px) 0 var(--sect-pad); position:relative; overflow:hidden; }
#new-feature-mask .cta::before { content:""; position:absolute; right:-70px; top:-50px; width:380px; height:380px; border-radius:50%; pointer-events:none; z-index:0;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--accent) 24%, transparent), transparent); filter: blur(12px); }
#new-feature-mask .cta .wrap { position:relative; z-index:1; }
#new-feature-mask .cta__card {
  display:flex; align-items:center; gap:26px; flex-wrap:wrap;
  background: linear-gradient(120deg, color-mix(in oklab, var(--accent) 17%, rgba(255,255,255,.6)), color-mix(in oklab, var(--accent) 8%, rgba(255,255,255,.5)));
  -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4);
  border:1px solid rgba(255,255,255,.45); border-radius: var(--radius-lg);
  padding:38px 42px;
  box-shadow: 0 4px 20px -10px color-mix(in oklab, var(--accent) 16%, transparent), 0 44px 84px -48px color-mix(in oklab, var(--accent) 32%, transparent), inset 0 1px 0 rgba(255,255,255,.5);
}
#new-feature-mask .cta__ic { width:64px; height:64px; border-radius:18px; flex:none; display:grid; place-items:center;
  background: linear-gradient(140deg, var(--accent), var(--accent-deep)); color:#fff; box-shadow: var(--shadow); }
#new-feature-mask .cta__txt { flex:1; min-width:220px; }
#new-feature-mask .cta__txt h2 { font-size:1.7rem; font-weight:800; }
#new-feature-mask .cta__txt p { color: var(--ink-2); margin-top:8px; max-width:34rem; }

/* ============ FOOTER ============ */
#new-feature-mask .foot { background: var(--bg); padding-top: 56px; }
#new-feature-mask .foot__rating { display:flex; justify-content:center; padding-bottom:40px; }
#new-feature-mask .foot__rating img { height:160px; width:auto; }
#new-feature-mask .foot__divider { height:1px; background: var(--line-2); }
#new-feature-mask .foot__inner { display:flex; justify-content:center; align-items:flex-start; gap:80px; padding-top:48px; padding-bottom:48px; flex-wrap:wrap; max-width:860px; margin:0 auto; }
#new-feature-mask .foot__col { min-width:160px; }
#new-feature-mask .foot__tagline-block { text-align:center; padding: 0 16px 48px; }
#new-feature-mask .foot__hero-title { font-size:clamp(1.6rem,3vw,2.2rem); font-weight:800; color: var(--ink); margin:0 0 12px; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; letter-spacing:-.01em; }
#new-feature-mask .foot__hero-sub { font-size:1rem; color: var(--ink-2); margin:0; line-height:1.6; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; }
#new-feature-mask .foot__tagline { font-weight:700; font-size:1rem; color: var(--ink); margin:0 0 10px; }
#new-feature-mask .foot__email { color: var(--ink-2); font-size:.92rem; display:block; margin-bottom:18px; }
#new-feature-mask .foot__email:hover { color: var(--accent); }
#new-feature-mask .foot__socials { display:flex; gap:10px; }
#new-feature-mask .foot__social { width:38px; height:38px; border-radius:50%; background: var(--ink); color:#fff; display:grid; place-items:center; transition: background var(--t); }
#new-feature-mask .foot__social:hover { background: var(--accent); }
#new-feature-mask .foot__heading { font-weight:700; font-size:.92rem; color: var(--ink); margin:0 0 16px; text-transform:uppercase; letter-spacing:.04em; font-size:.82rem; }
#new-feature-mask .foot__link { display:block; color: var(--ink-3); font-size:.92rem; padding:5px 0; transition: color var(--t); }
#new-feature-mask .foot__link:hover { color: var(--accent); }
#new-feature-mask .foot__appstore { display:inline-flex; align-items:center; gap:10px; background: var(--ink); color:#fff; border-radius:10px; padding:10px 18px; transition: background var(--t); text-decoration:none; }
#new-feature-mask .foot__appstore:hover { background: #333; }
#new-feature-mask .foot__appstore div { display:flex; flex-direction:column; }
#new-feature-mask .foot__appstore-sub { font-size:.65rem; opacity:.8; }
#new-feature-mask .foot__appstore-main { font-size:.95rem; font-weight:700; }

/* ============ 媒体查询命名空间重构 ============ */

@media (max-width: 940px) {
  #new-feature-mask .foot__inner { grid-template-columns:1fr 1fr; }
  #new-feature-mask .hero__inner { grid-template-columns:1fr; gap:44px; }
  #new-feature-mask .hero__art { max-width:480px; margin:0 auto; }
  #new-feature-mask .roles { grid-template-columns:1fr; }
  #new-feature-mask .nav__links { display:none; }
  #new-feature-mask .nav__burger { display:flex; }
}

@media (max-width: 560px) {
  #new-feature-mask .foot__inner { grid-template-columns:1fr; gap:28px; }
  #new-feature-mask .wrap { padding:0 20px; }
  #new-feature-mask .role { grid-template-columns:1fr; }
  #new-feature-mask .role__art { margin-top:10px; }
  #new-feature-mask .cta__card { padding:28px 24px; }
  #new-feature-mask { --sect-pad: 64px; }
}

/* ==================== 全局动画声明 (在命名空间外部) ==================== */
@keyframes fade { from{ opacity:0; transform: translateY(-6px); } to{ opacity:1; transform:none; } }
@keyframes bob { 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-10px); } }
@keyframes marquee { from{ transform: translateX(0); } to{ transform: translateX(-25%); } }