/* wchat 首页：深墨底 + 雾蓝灰强调色，克制、安静的质感 */
.lp {
  --bg: #0a0c0f;
  --surface: #101419;
  --text: #eef0ee;
  --muted: #8b939a;
  --line: rgba(255, 255, 255, .08);
  --accent-1: #dfe8ea;
  --accent-2: #a9c2cb;
  --accent-3: #8198a2;
  --accent: #a9c2cb;
  --accent-soft: rgba(169, 194, 203, .12);
  --ease: cubic-bezier(.16, 1, .3, 1);
  position: relative;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Source Han Sans CN", "Helvetica Neue", Arial, sans-serif;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
.lp * { box-sizing: border-box; }
:where(.lp) a { color: inherit; text-decoration: none; }
.lp-wrap { max-width: 1280px; margin: 0 auto; padding: 0 48px; }

/* 质感：噪点 + 跟随鼠标的光晕 */
.lp::after { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 90; opacity: .06; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>"); }
.lp-spot { position: fixed; inset: 0; pointer-events: none; z-index: 0; mix-blend-mode: screen; --sx: 70%; --sy: 30%; background: radial-gradient(520px circle at var(--sx) var(--sy), rgba(169, 194, 203, .09), transparent 62%); }

/* 导航 */
.lp-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; height: 80px; display: flex; align-items: center; justify-content: space-between; padding: 0 48px; border-bottom: 1px solid transparent; transition: background .6s var(--ease), border-color .6s var(--ease), backdrop-filter .6s; }
.lp-nav.solid { background: rgba(10, 12, 15, .76); backdrop-filter: blur(18px) saturate(140%); border-bottom-color: var(--line); }
.lp-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: .02em; }
.lp-mark { width: 30px; height: 30px; border-radius: 9px; background: var(--accent); color: #0b0b0c; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; }
.lp-links { display: flex; gap: 40px; font-size: 14px; color: #c9ccd2; letter-spacing: .08em; }
.lp-links a { position: relative; padding: 6px 0; transition: color .4s var(--ease); }
.lp-links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--accent-2); transform: scaleX(0); transform-origin: left; transition: transform .6s var(--ease); }
.lp-links a:hover { color: #fff; }
.lp-links a:hover::after { transform: scaleX(1); }
.lp-pill { padding: 10px 22px; border-radius: 999px; background: transparent; border: 1px solid rgba(255, 255, 255, .16); color: var(--text); font-weight: 600; font-size: 14px; transition: background .5s var(--ease), border-color .5s var(--ease), color .5s var(--ease); }
.lp-pill:hover { background: rgba(255, 255, 255, .04); border-color: var(--accent-2); color: var(--accent-2); }

/* 首屏 */
.lp-hero { position: relative; min-height: 100vh; display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: center; padding: 140px max(48px, calc((100% - 1280px) / 2)) 100px; overflow: hidden; }
.lp-hero::before { content: ""; position: absolute; width: 760px; height: 760px; right: -180px; top: -160px; border-radius: 50%; background: radial-gradient(closest-side, rgba(169, 194, 203, .14), transparent 70%); filter: blur(40px); animation: lpDrift 16s ease-in-out infinite; pointer-events: none; }
.lp-hero::after { content: ""; position: absolute; width: 620px; height: 620px; left: -220px; bottom: -220px; border-radius: 50%; background: radial-gradient(closest-side, rgba(129, 152, 162, .09), transparent 70%); filter: blur(40px); animation: lpDrift 19s ease-in-out infinite reverse; pointer-events: none; }
.lp-hero-copy { position: relative; z-index: 1; }
.lp-eyebrow-pill { display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, .03); backdrop-filter: blur(8px); font-size: 13px; color: #c9ccd2; letter-spacing: .04em; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 0 rgba(169, 194, 203, .6); animation: lpPulse 2s infinite; }
.lp-title { font-size: clamp(56px, 7.2vw, 96px); line-height: 1; font-weight: 750; letter-spacing: -.04em; margin: 30px 0 28px; }
.lp-line { display: block; }
.lp-line.gold { color: var(--accent-2); }
.lp-lead { font-size: 18px; line-height: 1.85; color: var(--muted); max-width: 600px; margin: 0 0 44px; }
.lp-actions { display: flex; align-items: center; gap: 40px; }
.lp-cta { display: inline-flex; align-items: center; gap: 16px; padding: 9px 9px 9px 30px; border-radius: 999px; background: var(--text); color: #0b0b0c; font-weight: 600; font-size: 16px; transition: transform .6s var(--ease), box-shadow .6s var(--ease); }
.lp-cta i { width: 46px; height: 46px; border-radius: 50%; background: #0b0b0c; color: var(--accent-2); display: flex; align-items: center; justify-content: center; font-style: normal; font-size: 22px; transition: transform .6s var(--ease); }
.lp-cta:hover { transform: translateY(-2px); box-shadow: 0 18px 44px rgba(169, 194, 203, .18); }
.lp-cta:hover i { transform: translateX(4px); }
.lp-ghost { position: relative; padding: 6px 0; color: var(--muted); font-size: 15px; transition: color .5s var(--ease); }
.lp-ghost::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--accent-2); transform: scaleX(.35); transform-origin: left; transition: transform .7s var(--ease); }
.lp-ghost:hover { color: var(--text); }
.lp-ghost:hover::after { transform: scaleX(1); }
.lp-note { margin: 46px 0 0; font-size: 12px; color: #5f646d; letter-spacing: .02em; }

.lp-hero-visual { position: relative; height: 680px; display: flex; align-items: center; justify-content: center; will-change: transform; }
.lp-orbit { position: absolute; width: 600px; height: 600px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .06); animation: lpSpin 30s linear infinite; }
.lp-orbit::before { content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; margin-left: -4px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 18px var(--accent-2); }
.lp-orbit.small { width: 440px; height: 440px; border-color: rgba(169, 194, 203, .14); animation-duration: 22s; animation-direction: reverse; }
.lp-orb { position: absolute; width: 520px; height: 520px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, rgba(223, 232, 234, .18), rgba(169, 194, 203, .04) 42%, transparent 68%); animation: lpFloat 9s ease-in-out infinite; }
.lp-phone { position: relative; width: 300px; height: 600px; border-radius: 44px; padding: 28px 18px; background: linear-gradient(160deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .015)); border: 1px solid rgba(255, 255, 255, .11); backdrop-filter: blur(18px); box-shadow: 0 40px 80px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255, 255, 255, .18); overflow: hidden; animation: lpTilt 9s ease-in-out infinite; }
.lp-phone-top { display: flex; gap: 12px; align-items: center; padding: 6px 4px 16px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.lp-phone-top b { display: block; font-size: 15px; }
.lp-phone-top small { color: var(--accent-2); font-size: 12px; }
.lp-av { width: 42px; height: 42px; border-radius: 50%; background: var(--accent); color: #0b0b0c; font-weight: 700; display: flex; align-items: center; justify-content: center; flex: none; }
.lp-bubble { max-width: 80%; margin-top: 14px; padding: 11px 15px; border-radius: 18px; font-size: 14px; line-height: 1.5; opacity: 0; animation: lpPop .9s var(--ease) forwards; }
.lp-bubble.l { background: rgba(255, 255, 255, .08); border-bottom-left-radius: 5px; }
.lp-bubble.r { margin-left: auto; background: var(--accent); color: #0b0b0c; border-bottom-right-radius: 5px; }
.lp-bubble.b1 { animation-delay: 1.2s; }
.lp-bubble.b2 { animation-delay: 1.9s; }
.lp-bubble.b3 { animation-delay: 2.6s; }
.lp-bubble.b4 { animation-delay: 3.3s; }
.lp-call { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); display: flex; gap: 16px; }
.lp-call span { width: 50px; height: 50px; border-radius: 50%; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .12); }
.lp-call span.accept { background: var(--accent); border-color: transparent; animation: lpPulse 2.2s infinite; }
.lp-chip { position: absolute; display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 14px; background: rgba(12, 15, 19, .7); border: 1px solid rgba(255, 255, 255, .12); backdrop-filter: blur(14px); font-size: 13px; box-shadow: 0 24px 44px rgba(0, 0, 0, .45); animation: lpFloat 7s ease-in-out infinite; }
.lp-chip.c1 { top: 120px; left: -10px; }
.lp-chip.c2 { bottom: 130px; right: -6px; animation-delay: -3.5s; }
.cdot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 12px var(--accent-2); }

/* 滚动字幕 */
.lp-marquee { position: relative; z-index: 1; overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 28px 0; }
.lp-marquee-track { display: flex; width: max-content; animation: lpMarquee 40s linear infinite; font-size: clamp(22px, 2.6vw, 34px); font-weight: 700; color: #2f3237; letter-spacing: -.01em; white-space: nowrap; }
.lp-marquee-track span { display: inline-flex; align-items: center; gap: 56px; padding-right: 56px; }
.lp-marquee-track span::after { content: "✦"; color: var(--accent-2); font-size: .55em; }

/* 数据 */
.lp-stats { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1280px; margin: 0 auto; }
.lp-stat { padding: 72px 36px; border-right: 1px solid var(--line); }
.lp-stat:last-child { border-right: 0; }
.lp-stat b { display: block; font-size: clamp(48px, 5.4vw, 80px); font-weight: 700; letter-spacing: -.04em; line-height: 1; margin-bottom: 14px; color: var(--text); font-variant-numeric: tabular-nums; }
.lp-stat span { color: var(--muted); font-size: 14px; letter-spacing: .06em; }

/* 标题 */
.lp-eyebrow { display: block; font-size: 12px; letter-spacing: .24em; color: var(--accent-2); font-weight: 700; margin-bottom: 18px; text-transform: uppercase; }
.lp-h2 { font-size: clamp(44px, 5.4vw, 80px); font-weight: 750; letter-spacing: -.04em; line-height: 1.04; margin: 0; }

/* 滚动叙事：左侧固定视觉，右侧逐段切换 */
.lp-features { position: relative; z-index: 1; padding: 180px 0 0; }
.lp-features-head { max-width: 1280px; margin: 0 auto 60px; padding: 0 48px; }
.lp-features-in { max-width: 1280px; margin: 0 auto; padding: 0 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.lp-sticky { position: sticky; top: 0; height: 100vh; }
.lp-vis { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; opacity: 0; transform: scale(.94); transition: opacity .9s var(--ease), transform 1.2s var(--ease); }
.lp-vis.active { opacity: 1; transform: none; }
.lp-steps { padding: 18vh 0 30vh; }
.lp-step { min-height: 78vh; display: flex; flex-direction: column; justify-content: center; opacity: .22; transition: opacity .7s var(--ease); }
.lp-step.on { opacity: 1; }
.lp-step .no { font-size: 13px; letter-spacing: .24em; color: var(--accent-2); font-weight: 700; }
.lp-step h3 { font-size: 52px; font-weight: 750; letter-spacing: -.03em; line-height: 1.1; margin: 16px 0 20px; }
.lp-step p { font-size: 18px; color: var(--muted); line-height: 1.85; max-width: 460px; margin: 0; }

.lp-lock { position: relative; width: 240px; height: 240px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: radial-gradient(circle, rgba(169, 194, 203, .14), rgba(169, 194, 203, .015) 70%); border: 1px solid rgba(169, 194, 203, .18); box-shadow: 0 0 100px rgba(169, 194, 203, .08); }
.lp-rings i { position: absolute; width: 240px; height: 240px; border-radius: 50%; border: 1px solid rgba(169, 194, 203, .22); animation: lpRing 3.6s infinite; }
.lp-rings i:nth-child(2) { animation-delay: 1.2s; }
.lp-rings i:nth-child(3) { animation-delay: 2.4s; }
.lp-p2p { position: relative; width: 460px; display: flex; align-items: center; }
.lp-p2p > span { width: 128px; height: 128px; flex: none; border-radius: 50%; background: var(--accent); color: #0b0b0c; font-weight: 750; font-size: 42px; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 70px rgba(169, 194, 203, .15); }
.lp-p2p > span.b { background: #f3f1ec; }
.lp-p2p em { flex: 1; height: 2px; margin: 0 18px; background: linear-gradient(90deg, transparent, var(--accent-2) 50%, transparent); background-size: 200% 100%; animation: lpSweep 1.8s linear infinite; }
.lp-media { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; width: 460px; }
.lp-media > div { height: 210px; border-radius: 26px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--line); background: linear-gradient(160deg, #17181c, #0e0e10); }
.lp-media > .t-img { background: radial-gradient(circle at 30% 30%, rgba(223, 232, 234, .24), transparent 55%), linear-gradient(160deg, #26272d, #111214); }
.t-vid { font-size: 44px; color: var(--accent-2); padding-left: 6px; }
.t-voice { gap: 7px; }
.t-voice b { width: 7px; height: 70px; border-radius: 4px; background: var(--accent); animation: lpBar 1.1s ease-in-out infinite; }
.t-voice b:nth-child(2) { animation-delay: .15s; }
.t-voice b:nth-child(3) { animation-delay: .3s; }
.t-voice b:nth-child(4) { animation-delay: .45s; }
.t-voice b:nth-child(5) { animation-delay: .6s; }
.t-file { font-weight: 700; font-size: 26px; letter-spacing: .08em; color: var(--text); }
.lp-quota { text-align: center; }
.ring { --p: 0%; width: 320px; height: 320px; margin: 0 auto; border-radius: 50%; background: conic-gradient(var(--accent-2) var(--p), rgba(255, 255, 255, .08) 0); display: flex; align-items: center; justify-content: center; animation: lpFill 2.2s var(--ease) .3s forwards; }
.ring > div { width: 282px; height: 282px; border-radius: 50%; background: var(--bg); display: flex; flex-direction: column; align-items: center; justify-content: center; }
.ring b { font-size: 64px; font-weight: 700; letter-spacing: -.03em; color: var(--accent-2); }
.ring small { color: var(--muted); font-size: 14px; margin-top: 6px; letter-spacing: .06em; }
.lp-quota p { color: var(--muted); margin: 30px 0 0; font-size: 14px; letter-spacing: .04em; }

/* 能力卡片：横向滑动，卡片内跟随鼠标的聚光 */
.lp-abilities { position: relative; z-index: 1; padding: 180px 0 160px; }
.lp-abilities .lp-wrap { margin-bottom: 64px; }
.lp-track { display: flex; gap: 24px; overflow-x: auto; padding: 8px max(48px, calc((100% - 1280px) / 2)) 40px; scroll-snap-type: x mandatory; scrollbar-width: none; }
.lp-track::-webkit-scrollbar { display: none; }
.lp-card { position: relative; flex: 0 0 360px; min-height: 400px; scroll-snap-align: start; padding: 38px; border-radius: 20px; overflow: hidden; background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .008)); border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .8s var(--ease), border-color .8s var(--ease); }
.lp-card::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(380px circle at var(--mx, 50%) var(--my, 0%), rgba(169, 194, 203, .10), transparent 60%); opacity: 0; transition: opacity .6s var(--ease); }
.lp-card:hover { transform: translateY(-4px); border-color: rgba(169, 194, 203, .25); }
.lp-card:hover::before { opacity: 1; }
.lp-card-no { font-size: 13px; letter-spacing: .2em; color: var(--accent-2); font-weight: 700; }
.lp-card h3 { font-size: 29px; font-weight: 700; letter-spacing: -.02em; margin: auto 0 14px; }
.lp-card p { color: var(--muted); line-height: 1.85; margin: 0; font-size: 15px; }

/* 收尾 */
.lp-band { position: relative; z-index: 1; padding: 170px 0; border-top: 1px solid var(--line); }
.lp-band-in { display: flex; justify-content: space-between; align-items: flex-end; gap: 48px; }
.lp-band h2 { font-size: clamp(56px, 8vw, 124px); font-weight: 750; letter-spacing: -.045em; line-height: .96; margin: 0; }
.lp-band h2 span { color: var(--accent-2); }
.lp-band-side { max-width: 360px; }
.lp-band-side p { color: var(--muted); font-size: 16px; line-height: 1.85; margin: 0 0 34px; }

/* 页脚 */
.lp-foot { position: relative; z-index: 1; padding: 100px 0 0; background: #080a0c; border-top: 1px solid var(--line); overflow: hidden; }
.lp-foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 64px; }
.lp-foot h4 { color: var(--text); margin: 0 0 18px; font-size: 14px; letter-spacing: .08em; }
.lp-foot a { display: block; margin: 11px 0; font-size: 14px; color: var(--muted); transition: color .4s var(--ease); }
.lp-foot a:hover { color: var(--accent-2); }
.lp-foot-brand p { font-size: 14px; line-height: 1.85; color: var(--muted); margin: 18px 0 0; max-width: 300px; }
.lp-giant { font-size: 21vw; font-weight: 800; letter-spacing: -.07em; line-height: .78; text-align: center; background: linear-gradient(180deg, rgba(200, 216, 222, .15), rgba(200, 216, 222, 0) 80%); -webkit-background-clip: text; background-clip: text; color: transparent; user-select: none; margin-bottom: -2vw; }
.lp-copy { display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 26px; padding-bottom: 28px; font-size: 13px; color: #5f646d; position: relative; z-index: 1; background: #080a0c; }

/* 动效 */
.lp-reveal { opacity: 0; transform: translateY(44px); filter: blur(10px); transition: opacity 1.2s var(--ease), transform 1.4s var(--ease), filter 1.2s var(--ease); transition-delay: calc(var(--d, 0) * 120ms); }
.lp-reveal.in { opacity: 1; transform: none; filter: none; }
.lp-rise { animation: lpRise 1.3s var(--ease) both; animation-delay: calc(var(--d, 0) * 140ms + 120ms); }

@property --p { syntax: '<percentage>'; inherits: false; initial-value: 0%; }
@keyframes lpRise { from { opacity: 0; transform: translateY(40px); filter: blur(8px); } to { opacity: 1; transform: none; filter: none; } }
@keyframes lpFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-18px); } }
@keyframes lpTilt { 0%, 100% { transform: rotate(-3deg); } 50% { transform: rotate(-1.5deg) translateY(-10px); } }
@keyframes lpPop { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }
@keyframes lpRing { from { transform: scale(.7); opacity: .9; } to { transform: scale(1.7); opacity: 0; } }
@keyframes lpSweep { from { background-position: 200% 0; } to { background-position: -200% 0; } }
@keyframes lpBar { 0%, 100% { transform: scaleY(.3); } 50% { transform: scaleY(1); } }
@keyframes lpPulse { 0% { box-shadow: 0 0 0 0 rgba(169, 194, 203, .55); } 70% { box-shadow: 0 0 0 12px rgba(169, 194, 203, 0); } 100% { box-shadow: 0 0 0 0 rgba(169, 194, 203, 0); } }
@keyframes lpFill { to { --p: 30%; } }
@keyframes lpSpin { to { transform: rotate(360deg); } }
@keyframes lpDrift { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-40px, 30px); } }
@keyframes lpMarquee { to { transform: translateX(-50%); } }

@media (max-width: 1000px) {
  .lp-nav { padding: 0 24px; }
  .lp-links { display: none; }
  .lp-wrap, .lp-features-head, .lp-features-in { padding-left: 24px; padding-right: 24px; }
  .lp-hero { grid-template-columns: 1fr; padding-top: 130px; min-height: auto; gap: 40px; }
  .lp-hero-visual { height: 560px; transform: none !important; }
  .lp-phone { transform: scale(.84); }
  .lp-chip { display: none; }
  .lp-stats { grid-template-columns: 1fr 1fr; }
  .lp-stat:nth-child(2) { border-right: 0; }
  .lp-stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .lp-features-in { grid-template-columns: 1fr; gap: 0; }
  .lp-sticky { position: relative; height: 480px; }
  .lp-vis { transform: none; }
  .lp-band-in { flex-direction: column; align-items: flex-start; }
  .lp-foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .lp-title { font-size: 54px; }
  .lp-h2 { font-size: 42px; }
  .lp-lead { font-size: 17px; }
  .lp-step h3 { font-size: 36px; }
  .lp-stat b { font-size: 44px; }
  .lp-stat { padding: 40px 20px; }
  .lp-actions { flex-direction: column; align-items: flex-start; gap: 22px; }
  .lp-media { width: 100%; }
  .lp-p2p { width: 100%; }
  .lp-p2p > span { width: 96px; height: 96px; font-size: 30px; }
  .lp-copy { flex-direction: column; gap: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .lp *, .lp *::before, .lp *::after { animation: none !important; transition: none !important; }
  .lp-reveal { opacity: 1; transform: none; filter: none; }
  .lp-bubble { opacity: 1; }
}