:root {
  --ink: #152125;
  --muted: #5f6f75;
  --mist: #eef8fb;
  --aqua: #14bde2;
  --aqua-deep: #0798c3;
  --rose: #f3a5d9;
  --coral: #f17568;
  --lime: #bedb73;
  --paper: #fbfbf7;
  --line: rgba(21, 33, 37, .12);
  --shadow: 0 24px 70px rgba(25, 74, 91, .18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "Songti SC", "Noto Serif SC", "STSong", serif;
  letter-spacing: 0;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: 72px;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(20px, 5vw, 72px);
  color: white;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.site-header.is-solid {
  background: rgba(251, 251, 247, .88);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; }
.brand-logo-full {
  width: 136px;
  height: auto;
  object-fit: contain;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(255,255,255,.78);
  box-shadow: 0 12px 32px rgba(20,189,226,.18);
  backdrop-filter: blur(10px);
}
.site-header.is-solid .brand-logo-full { background: rgba(255,255,255,.92); }
.nav { display: flex; justify-content: center; gap: 30px; font-size: 14px; }
.header-cta, .primary, .secondary, .signup button {
  border-radius: 8px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  font-weight: 700;
}
.header-cta { background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.35); }
.site-header.is-solid .header-cta { background: var(--ink); color: white; }

.hero {
  min-height: 96svh;
  position: relative;
  overflow: hidden;
  display: grid;
  align-items: end;
  padding: 112px clamp(22px, 6vw, 88px) 72px;
  background: #12313a;
  color: white;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,31,37,.88), rgba(8,31,37,.42) 46%, rgba(8,31,37,.12));
  z-index: 1;
}
.hero-media {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.1fr .9fr .8fr;
  gap: 0;
  opacity: .96;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.08) contrast(.98);
}
.hero-media img:nth-child(2), .hero-media img:nth-child(3) { opacity: .72; }
.hero-copy { position: relative; z-index: 2; width: 100%; max-width: 760px; min-width: 0; padding-bottom: 26px; }
.eyebrow { margin: 0 0 14px; color: var(--aqua); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: 13px; }
.hero h1 { font-family: "Songti SC", "STSong", serif; font-size: clamp(74px, 15vw, 172px); line-height: .88; margin: 0; letter-spacing: 0; }
.hero-subtitle { font-size: clamp(24px, 4vw, 44px); margin: 18px 0 12px; font-weight: 700; }
.hero-text { max-width: 650px; font-size: 18px; line-height: 1.9; color: rgba(255,255,255,.86); margin: 0 0 28px; overflow-wrap: anywhere; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.primary { background: var(--aqua); color: white; box-shadow: 0 14px 40px rgba(20,189,226,.32); }
.secondary { border: 1px solid rgba(255,255,255,.38); color: white; }
.hero-next { position: absolute; z-index: 2; right: clamp(24px, 5vw, 74px); bottom: 30px; color: rgba(255,255,255,.72); font-size: 13px; }

.band { padding: 34px clamp(20px, 6vw, 88px); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--ink); color: white; }
.metric { background: #1d2c31; padding: 30px; }
.metric strong { display: block; font-size: clamp(28px, 4vw, 48px); color: var(--aqua); }
.metric span { color: rgba(255,255,255,.74); }

.section { padding: clamp(72px, 10vw, 128px) clamp(22px, 6vw, 88px); }
.section-heading { max-width: 820px; margin-bottom: 46px; }
.section-heading h2, .scene-copy h3, .module-copy h2, .join h2 { font-size: clamp(34px, 5vw, 64px); line-height: 1.12; margin: 0 0 18px; }
.section-heading p, .scene-copy p, .module-copy p, .join p { color: var(--muted); font-size: 17px; line-height: 1.9; }

.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature { min-height: 300px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.42); }
.feature-no { color: var(--coral); font-weight: 900; }
.feature h3 { font-size: 28px; margin: 68px 0 14px; }
.feature p { color: var(--muted); line-height: 1.8; }

.scenes { background: linear-gradient(180deg, #f8fdff, #fff7f8); }
.scene-row { display: grid; grid-template-columns: minmax(320px, 1fr) minmax(320px, 520px); align-items: center; gap: clamp(40px, 8vw, 110px); margin-bottom: 110px; }
.scene-row.reverse { grid-template-columns: minmax(320px, 520px) minmax(320px, 1fr); }
.scene-row.reverse .phone-stack { order: 2; }
.phone-stack { position: relative; min-height: 620px; }
.phone {
  position: absolute;
  width: min(46vw, 300px);
  border-radius: 32px;
  box-shadow: var(--shadow);
  border: 8px solid rgba(255,255,255,.75);
}
.phone.one { left: 9%; top: 0; transform: rotate(-4deg); }
.phone.two { left: 42%; top: 90px; transform: rotate(5deg); }
.phone-stack.wide .phone.one { left: 8%; }
.phone-stack.wide .phone.two { left: 48%; }
.pill { display: inline-flex; min-height: 32px; align-items: center; padding: 0 12px; border-radius: 8px; background: rgba(20,189,226,.12); color: var(--aqua-deep); font-weight: 800; }
.pill.coral { background: rgba(241,117,104,.12); color: var(--coral); }
.scene-copy ul { padding: 0; margin: 26px 0 0; list-style: none; display: grid; gap: 12px; }
.scene-copy li { padding-left: 22px; position: relative; color: var(--ink); }
.scene-copy li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--aqua); }
.scene-gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: start; }
.scene-gallery img { border-radius: 18px; box-shadow: 0 20px 50px rgba(21,33,37,.14); background: white; }

.design-language { background: var(--ink); color: white; }
.design-language .section-heading p { color: rgba(255,255,255,.68); }
.language-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.language-grid div { border: 1px solid rgba(255,255,255,.16); padding: 24px; min-height: 220px; background: rgba(255,255,255,.04); }
.language-grid span { display: block; height: 82px; border-radius: 8px; margin-bottom: 28px; }
.language-grid div:nth-child(1) span { background: linear-gradient(135deg, #1fc7e6, #71d9ef); }
.language-grid div:nth-child(2) span { background: linear-gradient(135deg, #f2a3d7, #ffd6e7); }
.language-grid div:nth-child(3) span { background: linear-gradient(135deg, #131313, #d9a85f); }
.language-grid div:nth-child(4) span { background: linear-gradient(135deg, #eef8fb, #bedb73); }
.language-grid p { color: rgba(255,255,255,.68); line-height: 1.8; }


.modules { display: grid; grid-template-columns: minmax(320px, 520px) 1fr; gap: clamp(42px, 8vw, 120px); background: #f4fbf8; }
.module-board { display: grid; gap: 12px; align-content: center; }
.module-board span { color: var(--aqua-deep); font-weight: 900; }
.module-board strong { display: block; padding: 22px; border-radius: 8px; background: white; box-shadow: 0 16px 40px rgba(21,33,37,.08); font-size: 20px; }

.join { background: linear-gradient(135deg, #0f2b32, #166072 58%, #ee9ac8); color: white; }
.join-inner { max-width: 800px; }
.join p { color: rgba(255,255,255,.78); }
.signup { display: flex; gap: 12px; margin-top: 30px; max-width: 620px; }
.signup input { flex: 1; min-height: 52px; border-radius: 8px; border: 1px solid rgba(255,255,255,.38); background: rgba(255,255,255,.12); color: white; padding: 0 16px; font: inherit; }
.signup input::placeholder { color: rgba(255,255,255,.72); }
.signup button { border: 0; background: white; color: var(--ink); font: inherit; cursor: pointer; }
.join small { display: block; margin-top: 14px; color: rgba(255,255,255,.6); }
.signup-hint { margin: 12px 0 0; min-height: 20px; font-size: 14px; color: #ffe1f1; }
.site-footer { min-height: 92px; padding: 0 clamp(22px, 6vw, 88px); display: flex; align-items: center; justify-content: space-between; background: var(--ink); color: rgba(255,255,255,.76); }
.site-footer span:first-child { font-family: "Songti SC", "STSong", serif; color: white; font-size: 28px; }
.site-footer .beian { color: rgba(255,255,255,.55); font-size: 13px; text-decoration: none; }
.site-footer .beian:hover { color: rgba(255,255,255,.85); }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .hero { min-height: 92svh; }
  .hero-media { grid-template-columns: 1fr; }
  .hero-media img:nth-child(2), .hero-media img:nth-child(3) { display: none; }
  .metrics, .feature-grid, .language-grid, .modules { grid-template-columns: 1fr; }
  .scene-row, .scene-row.reverse { grid-template-columns: 1fr; margin-bottom: 72px; }
  .scene-row.reverse .phone-stack { order: 0; }
  .phone-stack { min-height: 540px; }
  .phone { width: min(58vw, 260px); }
  .phone.one { left: 2%; }
  .phone.two { left: 37%; }
  .scene-gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .header-cta { display: none; }
  .site-header { height: 64px; padding-inline: 20px; }
  .hero { min-height: 100svh; padding: 90px 20px 58px; align-items: center; }
  .hero::after { background: linear-gradient(90deg, rgba(8,31,37,.9), rgba(8,31,37,.68)); }
  .hero-media { opacity: .72; }
  .hero-media img { object-position: center; }
  .hero-copy { max-width: min(350px, calc(100vw - 48px)); justify-self: start; }
  .hero h1 { font-size: clamp(66px, 20vw, 92px); }
  .hero-subtitle { font-size: 26px; }
  .hero-text { max-width: 100%; font-size: 16px; line-height: 1.78; word-break: break-all; }
  .hero-actions, .signup { flex-direction: column; width: 100%; max-width: min(350px, calc(100vw - 48px)); }
  .hero-actions a, .signup button, .signup input { width: 100%; }
  .hero-next { display: none; }
  .section { padding: 70px 20px; }
  .feature { min-height: 240px; }
  .feature h3 { margin-top: 38px; }
  .phone-stack { min-height: 480px; }
  .phone { width: 54vw; border-radius: 24px; border-width: 6px; }
  .phone.two { left: 34%; top: 70px; }
  .scene-gallery { gap: 10px; }
  .site-footer { align-items: flex-start; justify-content: center; flex-direction: column; gap: 8px; }
}

.dating-card {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(300px, 380px) minmax(250px, .7fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  padding: clamp(26px, 5vw, 54px);
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(255,255,255,.82), rgba(255,238,247,.72));
  box-shadow: 0 24px 70px rgba(21,33,37,.12);
  border: 1px solid rgba(21,33,37,.08);
}
.dating-card > * { min-width: 0; }
.dating-card h3 { font-size: clamp(30px, 4vw, 52px); line-height: 1.16; margin: 20px 0 16px; overflow-wrap: anywhere; }
.dating-card p { color: var(--muted); font-size: 17px; line-height: 1.9; margin: 0; overflow-wrap: anywhere; }
.dating-visual {
  align-self: center;
  position: relative;
  max-height: 620px;
  overflow: hidden;
  border-radius: 34px;
  border: 7px solid rgba(255,255,255,.86);
  box-shadow: 0 24px 64px rgba(21,33,37,.16);
  background: #ffe4ef;
}
.dating-visual::before {
  content: "";
  position: absolute;
  inset: 10% -10% -8% 14%;
  border-radius: 34px;
  background: linear-gradient(145deg, rgba(20,189,226,.2), rgba(243,165,217,.28));
  filter: blur(2px);
  z-index: -1;
}
.dating-visual img {
  width: 100%;
  height: auto;
  margin: 0;
  border-radius: 26px;
}
.dating-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 150px;
  background: linear-gradient(180deg, rgba(255,228,239,0), rgba(255,228,239,.96));
  pointer-events: none;
}
.dating-visual span {
  position: absolute;
  left: 50%;
  bottom: 18px;
  z-index: 1;
  transform: translateX(-50%);
  min-width: max-content;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,.82);
  color: #cc3d78;
  font-size: 13px;
  font-weight: 900;
  box-shadow: 0 12px 26px rgba(176, 49, 99, .16);
}
.dating-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-content: center; }
.dating-points strong {
  min-height: 112px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
  border-radius: 20px;
  background: rgba(255,255,255,.78);
  color: var(--ink);
  box-shadow: 0 16px 36px rgba(21,33,37,.08);
}

.cloud-pet {
  background:
    radial-gradient(circle at 18% 14%, rgba(20,189,226,.16), transparent 30%),
    radial-gradient(circle at 84% 18%, rgba(243,165,217,.28), transparent 34%),
    linear-gradient(180deg, #fff9fb, #f2fbff);
}
.reward-strip {
  display: grid;
  grid-template-columns: 1fr 34px 1fr 34px 1fr 34px 1fr;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  padding: 24px;
  border-radius: 26px;
  background: rgba(255,255,255,.72);
  box-shadow: 0 20px 56px rgba(21,33,37,.1);
  border: 1px solid rgba(21,33,37,.08);
}
.reward-strip span {
  min-height: 70px;
  display: grid;
  place-items: center;
  text-align: center;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(20,189,226,.12), rgba(243,165,217,.16));
  font-size: 20px;
  font-weight: 900;
}
.reward-strip i {
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--rose));
  position: relative;
}
.reward-strip i::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--rose);
  border-right: 2px solid var(--rose);
  transform: translateY(-50%) rotate(45deg);
}

.community-life {
  background: #fbfbf7;
}
.life-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.life-grid article {
  overflow: hidden;
  border-radius: 30px;
  background: white;
  box-shadow: 0 22px 58px rgba(21,33,37,.1);
  border: 1px solid rgba(21,33,37,.08);
}
.life-grid img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  object-position: top center;
}
.life-grid span {
  display: inline-flex;
  margin: 24px 24px 0;
  min-height: 30px;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(20,189,226,.12);
  color: var(--aqua-deep);
  font-size: 13px;
  font-weight: 900;
}
.life-grid h3 {
  margin: 18px 24px 10px;
  font-size: 26px;
  line-height: 1.25;
}
.life-grid p {
  margin: 0 24px 28px;
  color: var(--muted);
  line-height: 1.8;
}

@media (max-width: 980px) {
  .dating-card, .life-grid { grid-template-columns: 1fr; }
  .dating-visual { max-height: 680px; max-width: 440px; justify-self: center; }
  .reward-strip { grid-template-columns: 1fr; }
  .reward-strip i { width: 2px; height: 24px; justify-self: center; background: linear-gradient(180deg, var(--aqua), var(--rose)); }
  .reward-strip i::after { right: auto; left: 50%; top: auto; bottom: -1px; transform: translateX(-50%) rotate(135deg); }
  .life-grid img { height: 420px; }
}

@media (max-width: 620px) {
  .dating-card { width: 100%; max-width: 100%; overflow: hidden; padding: 22px; border-radius: 24px; }
  .dating-card h3 { max-width: 100%; font-size: clamp(28px, 9vw, 34px); word-break: break-all; }
  .dating-card p { max-width: 100%; word-break: break-all; }
  .dating-visual { width: 100%; max-width: calc(100vw - 84px); max-height: 520px; border-width: 5px; border-radius: 28px; }
  .dating-visual img { border-radius: 22px; }
  .dating-visual::after { height: 120px; }
  .dating-visual span { bottom: 14px; font-size: 12px; }
  .dating-points { grid-template-columns: 1fr; }
  .dating-points strong { min-height: 72px; }
  .reward-strip { padding: 16px; border-radius: 22px; }
  .reward-strip span { min-height: 58px; font-size: 17px; }
  .life-grid article { border-radius: 24px; }
  .life-grid img { height: 320px; }
}