:root {
  --ink: #17131d;
  --ink-soft: #504957;
  --paper: #fff;
  --mist: #f8f6fa;
  --pink: #f44f91;
  --pink-bright: #ff65b5;
  --pink-soft: #ffe8f2;
  --purple: #7457ff;
  --line: rgba(23, 19, 29, .1);
  --shadow: 0 28px 70px rgba(32, 19, 41, .14);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 16px; background: #fff; border-radius: 10px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  background: rgba(23, 19, 29, .76);
  border-bottom: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(18px);
  transition: background .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { background: rgba(23, 19, 29, .94); box-shadow: 0 10px 30px rgba(0,0,0,.12); }
.nav-shell { width: min(1180px, calc(100% - 40px)); height: 76px; margin: auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #fff; font-size: 20px; font-weight: 800; letter-spacing: .02em; }
.brand img { border-radius: 13px; box-shadow: 0 8px 20px rgba(244,79,145,.24); }
.main-nav { display: flex; align-items: center; gap: 32px; color: rgba(255,255,255,.76); font-size: 14px; font-weight: 600; }
.main-nav a { transition: color .2s ease, transform .2s ease; }
.main-nav a:hover, .main-nav a:focus-visible { color: #fff; }
.main-nav .nav-cta { color: #fff; background: linear-gradient(135deg, var(--pink), var(--pink-bright)); padding: 11px 20px; border-radius: 999px; box-shadow: 0 10px 28px rgba(244,79,145,.28); }
.main-nav .nav-cta:hover { transform: translateY(-2px); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 12px; background: rgba(255,255,255,.1); padding: 12px 10px; }
.nav-toggle span { display: block; width: 23px; height: 2px; margin: 5px auto; background: #fff; transition: transform .2s ease, opacity .2s ease; }

.hero { position: relative; min-height: 820px; padding: 150px 0 110px; color: #fff; background: linear-gradient(128deg, #17131d 0%, #211527 52%, #321a33 100%); overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .11; background-image: linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to bottom, black, transparent 82%); }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .7; }
.hero-glow-one { width: 550px; height: 550px; right: -110px; top: -170px; background: radial-gradient(circle, rgba(255,83,166,.38), transparent 68%); }
.hero-glow-two { width: 480px; height: 480px; left: 24%; bottom: -330px; background: radial-gradient(circle, rgba(116,87,255,.26), transparent 68%); }
.hero-grid { position: relative; z-index: 2; width: min(1180px, calc(100% - 40px)); margin: auto; display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 70px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 24px; padding: 9px 14px; border: 1px solid rgba(255,255,255,.14); border-radius: 999px; background: rgba(255,255,255,.06); color: rgba(255,255,255,.82); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.live-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #ff4f78; box-shadow: 0 0 0 6px rgba(255,79,120,.14); animation: pulse 1.8s infinite; }
.hero h1 { margin: 0; font-size: clamp(48px, 5.6vw, 78px); line-height: 1.12; letter-spacing: -.045em; }
.hero h1 em { color: transparent; background: linear-gradient(100deg, #ff7cba, #ff4f98 52%, #bca9ff); background-clip: text; -webkit-background-clip: text; font-style: normal; }
.hero-copy > p { max-width: 600px; margin: 28px 0 0; color: rgba(255,255,255,.68); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 52px; padding: 0 24px; border-radius: 14px; font-size: 15px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--pink), #ff6ab8); box-shadow: 0 16px 34px rgba(244,79,145,.28); }
.button-ghost { color: #fff; border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.06); }
.button-ghost:hover { background: rgba(255,255,255,.11); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 20px; margin: 30px 0 0; padding: 0; list-style: none; color: rgba(255,255,255,.56); font-size: 13px; }
.hero-tags li::before { content: "✓"; margin-right: 7px; color: #ff78b7; font-weight: 900; }
.hero-visual { position: relative; min-height: 610px; }
.phone { position: absolute; width: 264px; padding: 10px; border: 1px solid rgba(255,255,255,.18); border-radius: 42px; background: #0f0c13; box-shadow: 0 40px 90px rgba(0,0,0,.42); overflow: hidden; }
.phone img { width: 100%; border-radius: 32px; }
.phone-speaker { position: absolute; z-index: 2; width: 78px; height: 22px; left: 50%; top: 14px; transform: translateX(-50%); border-radius: 999px; background: #0b090d; }
.phone-front { left: 47%; top: 8px; z-index: 4; transform: rotate(4deg); }
.phone-back { left: 12%; top: 76px; z-index: 2; transform: rotate(-10deg) scale(.9); opacity: .78; }
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.1); border-radius: 50%; }
.orbit-one { width: 520px; height: 520px; left: 1%; top: 34px; }
.orbit-two { width: 390px; height: 390px; left: 12%; top: 103px; border-color: rgba(255,99,180,.18); }
.floating-card { position: absolute; z-index: 8; border: 1px solid rgba(255,255,255,.15); border-radius: 14px; background: rgba(31,23,37,.82); box-shadow: 0 16px 38px rgba(0,0,0,.24); backdrop-filter: blur(12px); font-size: 12px; font-weight: 800; }
.floating-live { right: 2%; top: 86px; display: flex; align-items: center; gap: 9px; padding: 12px 15px; letter-spacing: .1em; }
.floating-heart { right: 4%; bottom: 120px; display: grid; width: 52px; height: 52px; place-items: center; color: #ff66ae; font-size: 23px; transform: rotate(8deg); }
.floating-chat { left: 2%; bottom: 54px; padding: 13px 17px; color: rgba(255,255,255,.76); }
.hero-wave { position: absolute; z-index: 3; left: -2%; right: -2%; bottom: -58px; height: 120px; background: #fff; border-radius: 50% 50% 0 0 / 52% 52% 0 0; }

.quick-features { position: relative; z-index: 5; width: min(1040px, calc(100% - 40px)); margin: -64px auto 0; padding: 30px 40px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.quick-feature { display: flex; align-items: center; justify-content: center; gap: 15px; }
.quick-feature:not(:last-child) { border-right: 1px solid var(--line); }
.feature-icon { display: grid; flex: 0 0 44px; height: 44px; place-items: center; border-radius: 14px; color: var(--pink); background: var(--pink-soft); font-size: 22px; font-weight: 900; }
.quick-feature strong { display: block; margin-bottom: 5px; font-size: 16px; }
.quick-feature p { margin: 0; color: #887f8d; font-size: 12px; }

.section { padding: 120px 0; }
.section-heading { width: min(760px, calc(100% - 40px)); margin: 0 auto 70px; text-align: center; }
.section-heading > span, .section-kicker { color: var(--pink); font-size: 12px; font-weight: 900; letter-spacing: .16em; }
.section-heading h2, .experience h2 { margin: 14px 0 16px; font-size: clamp(34px, 4vw, 52px); line-height: 1.2; letter-spacing: -.035em; }
.section-heading p, .experience-copy > p { margin: 0; color: #756d7a; font-size: 16px; line-height: 1.85; }
.feature-layout { width: min(1080px, calc(100% - 40px)); margin: auto; display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 100px; }
.feature-phone { position: relative; min-height: 620px; display: grid; place-items: center; border-radius: 42px; background: radial-gradient(circle at 50% 45%, #fff 0 34%, transparent 35%), linear-gradient(145deg, #fff0f6, #f1edff); }
.phone-static { position: relative; width: 246px; transform: rotate(-3deg); box-shadow: 0 35px 70px rgba(63,39,71,.24); }
.feature-bubble { position: absolute; padding: 13px 16px; border: 1px solid var(--line); border-radius: 13px; background: rgba(255,255,255,.92); box-shadow: 0 16px 35px rgba(54,35,63,.12); color: #554a59; font-size: 12px; font-weight: 700; }
.bubble-one { right: 24px; top: 100px; }
.bubble-two { left: 22px; bottom: 105px; }
.feature-list { display: grid; gap: 12px; }
.feature-card { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 22px; border: 1px solid transparent; border-radius: 18px; transition: border-color .2s ease, background .2s ease, transform .2s ease; }
.feature-card:hover { transform: translateX(6px); border-color: var(--line); background: #fff; box-shadow: 0 14px 38px rgba(42,27,49,.06); }
.feature-card > span { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 13px; color: var(--pink); background: var(--pink-soft); font-size: 12px; font-weight: 900; }
.feature-card h3 { margin: 1px 0 8px; font-size: 19px; }
.feature-card p { margin: 0; color: #7f7684; font-size: 14px; line-height: 1.75; }

.showcase { color: #fff; background: var(--ink); overflow: hidden; }
.showcase::before { content: ""; position: absolute; }
.section-heading-light h2 { color: #fff; }
.section-heading-light p { color: rgba(255,255,255,.58); }
.screen-gallery { width: min(1320px, calc(100% - 32px)); margin: auto; display: grid; grid-template-columns: repeat(5, minmax(160px, 1fr)); gap: 24px; align-items: center; }
.screen-item { margin: 0; text-align: center; transition: transform .25s ease; }
.screen-item:nth-child(1), .screen-item:nth-child(5) { transform: scale(.86); opacity: .65; }
.screen-item:nth-child(2), .screen-item:nth-child(4) { transform: scale(.93); opacity: .82; }
.screen-item:hover { transform: translateY(-10px) scale(1); opacity: 1; }
.mini-phone { padding: 8px; border: 1px solid rgba(255,255,255,.15); border-radius: 32px; background: #0d0a10; box-shadow: 0 24px 55px rgba(0,0,0,.34); overflow: hidden; }
.mini-phone img { border-radius: 25px; }
.screen-item figcaption { margin-top: 18px; color: rgba(255,255,255,.66); font-size: 13px; font-weight: 700; }

.experience { width: min(1080px, calc(100% - 40px)); margin: auto; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 100px; }
.check-list { display: grid; gap: 20px; margin: 35px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 14px; align-items: flex-start; color: #756d7a; line-height: 1.7; }
.check-list i { display: grid; flex: 0 0 28px; height: 28px; place-items: center; border-radius: 50%; color: #fff; background: var(--pink); font-style: normal; font-size: 13px; font-weight: 900; }
.check-list strong { color: var(--ink); margin-right: 8px; }
.experience-art { position: relative; min-height: 450px; border-radius: 44px; background: linear-gradient(145deg, #221726, #472136); overflow: hidden; }
.experience-art::before { content: ""; position: absolute; width: 330px; height: 330px; right: -90px; top: -110px; border-radius: 50%; background: radial-gradient(circle, rgba(255,100,176,.55), transparent 68%); }
.art-card { position: absolute; z-index: 2; border: 1px solid rgba(255,255,255,.13); background: rgba(255,255,255,.09); backdrop-filter: blur(18px); color: #fff; box-shadow: 0 26px 60px rgba(0,0,0,.24); }
.art-card-main { left: 70px; top: 70px; width: 245px; padding: 28px; border-radius: 28px; text-align: center; transform: rotate(-4deg); }
.art-card-main img { width: 128px; margin: auto; border-radius: 30px; }
.art-card-main strong { display: block; margin-top: 20px; font-size: 25px; }
.art-card-main span { display: block; margin-top: 6px; color: rgba(255,255,255,.6); font-size: 12px; }
.art-card-small { right: 36px; bottom: 54px; display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-radius: 16px; color: #ff79b8; font-size: 25px; transform: rotate(7deg); }
.art-card-small span { color: rgba(255,255,255,.72); font-size: 12px; font-weight: 700; }
.art-ring { position: absolute; width: 370px; height: 370px; left: 52px; top: 40px; border: 1px solid rgba(255,255,255,.09); border-radius: 50%; }

.final-cta { padding: 20px 20px 100px; }
.final-cta-inner { width: min(1120px, 100%); margin: auto; padding: 42px 48px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; color: #fff; border-radius: 32px; background: linear-gradient(120deg, #f3478e, #f763a8 58%, #8e65ff); box-shadow: 0 30px 70px rgba(244,79,145,.22); }
.final-cta-inner > img { border-radius: 25px; box-shadow: 0 14px 28px rgba(82,24,58,.22); }
.final-cta-inner span { font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.final-cta h2 { margin: 5px 0 4px; font-size: clamp(26px, 3vw, 38px); }
.final-cta p { margin: 0; color: rgba(255,255,255,.75); font-size: 14px; }
.button-light { color: var(--pink); background: #fff; box-shadow: 0 14px 30px rgba(77,22,52,.16); white-space: nowrap; }

.site-footer { padding: 48px 0; color: rgba(255,255,255,.62); background: var(--ink); }
.footer-inner { width: min(1180px, calc(100% - 40px)); margin: auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; }
.footer-brand { font-size: 17px; }
.footer-inner > p { margin: 0; font-size: 13px; }
.footer-meta { display: flex; gap: 18px; font-size: 12px; }
.footer-meta a:hover { color: #fff; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 5px rgba(255,79,120,.12); } 50% { box-shadow: 0 0 0 10px rgba(255,79,120,0); } }

@media (max-width: 980px) {
  .hero { min-height: auto; padding-bottom: 140px; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-copy > p { margin-inline: auto; }
  .hero-actions, .hero-tags { justify-content: center; }
  .hero-visual { width: min(620px, 100%); margin: 0 auto; }
  .feature-layout, .experience { grid-template-columns: 1fr; gap: 60px; }
  .feature-phone { width: min(560px, 100%); margin: auto; }
  .feature-list { width: min(680px, 100%); margin: auto; }
  .screen-gallery { grid-template-columns: repeat(5, 220px); overflow-x: auto; scroll-snap-type: x mandatory; padding: 20px 30px 40px; }
  .screen-item { scroll-snap-align: center; opacity: 1 !important; transform: none !important; }
  .experience-copy { text-align: center; }
  .check-list { width: min(520px, 100%); margin-inline: auto; text-align: left; }
  .experience-art { width: min(560px, 100%); margin: auto; }
}

@media (max-width: 760px) {
  .nav-shell { width: min(100% - 28px, 1180px); height: 68px; }
  .nav-toggle { display: block; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .main-nav { position: absolute; left: 14px; right: 14px; top: 75px; display: none; padding: 18px; flex-direction: column; align-items: stretch; gap: 4px; border: 1px solid rgba(255,255,255,.1); border-radius: 18px; background: rgba(23,19,29,.98); box-shadow: 0 18px 45px rgba(0,0,0,.25); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
  .main-nav .nav-cta { text-align: center; margin-top: 5px; }
  .hero { padding-top: 118px; }
  .hero-grid { width: min(100% - 28px, 1180px); gap: 32px; }
  .hero h1 { font-size: clamp(42px, 12vw, 62px); }
  .hero-copy > p { font-size: 15px; line-height: 1.75; }
  .hero-visual { min-height: 490px; transform: scale(.85); transform-origin: top center; margin-bottom: -65px; }
  .phone-front { left: 42%; }
  .phone-back { left: 2%; }
  .floating-live { right: -3%; }
  .quick-features { grid-template-columns: 1fr; gap: 20px; padding: 26px; }
  .quick-feature { justify-content: flex-start; }
  .quick-feature:not(:last-child) { padding-bottom: 20px; border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 90px 0; }
  .section-heading { margin-bottom: 46px; }
  .feature-layout, .experience { width: min(100% - 28px, 1080px); }
  .feature-phone { min-height: 530px; }
  .phone-static { width: 210px; }
  .feature-card { padding: 18px 4px; }
  .feature-card:hover { transform: none; box-shadow: none; }
  .experience-art { min-height: 390px; }
  .art-card-main { left: 32px; top: 50px; width: 220px; }
  .art-ring { left: 12px; top: 16px; }
  .final-cta { padding: 0 14px 72px; }
  .final-cta-inner { padding: 34px 26px; grid-template-columns: 1fr; text-align: center; }
  .final-cta-inner > img { margin: auto; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .footer-meta { flex-direction: column; gap: 8px; }
}

@media (max-width: 430px) {
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .hero-visual { transform: scale(.72); margin-bottom: -135px; }
  .feature-phone { min-height: 475px; }
  .bubble-one { right: 8px; }
  .bubble-two { left: 8px; }
  .experience-art { min-height: 350px; }
  .art-card-main { left: 24px; width: 200px; padding: 24px; }
  .art-card-main img { width: 108px; }
  .art-card-small { right: 18px; bottom: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}