/* ==========================================================================
   Lila — 配色取自 App Logo：樱花粉 / 玫红 / 奶油白 / 深梅色
   ========================================================================== */

:root {
  --bg: #120610;
  --bg-soft: #180a14;
  --bg-elev: #1f0d1a;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.075);
  --line: rgba(255, 138, 180, 0.16);
  --line-strong: rgba(255, 138, 180, 0.34);

  --text: #fdf0f5;
  --muted: #c3a2b3;
  --muted-2: #9d7f8f;

  --pink: #ff3d84;
  --pink-light: #ff7bb4;
  --pink-soft: #ffb3cf;
  --pink-deep: #c9165c;
  --cream: #fff1f6;

  --grad: linear-gradient(120deg, #ffd3e3 0%, #ff5c9c 42%, #ff2e6f 100%);
  --grad-strong: linear-gradient(135deg, #ff6ba5 0%, #ff2e6f 55%, #d3195e 100%);

  --radius-sm: 14px;
  --radius: 22px;
  --radius-lg: 32px;

  --shadow-soft: 0 24px 60px -30px rgba(0, 0, 0, 0.9);
  --shadow-pink: 0 18px 50px -18px rgba(255, 46, 111, 0.55);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --header-h: 76px;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

::selection {
  background: rgba(255, 61, 132, 0.35);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--pink-light);
  outline-offset: 4px;
}

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

/* ---------- 通用元素 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--pink-soft);
  text-transform: uppercase;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 0 4px rgba(255, 61, 132, 0.18);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(255, 61, 132, 0.16); }
  50% { box-shadow: 0 0 0 7px rgba(255, 61, 132, 0.04); }
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section {
  position: relative;
  padding: clamp(72px, 9vw, 120px) 0;
}

.section-head {
  max-width: 760px;
  margin: 0 auto clamp(40px, 5vw, 64px);
  text-align: center;
}

.section-head h2 {
  margin-top: 18px;
  font-size: clamp(1.85rem, 3.4vw, 2.9rem);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.section-desc {
  margin-top: 18px;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.1vw, 1.03rem);
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.35s ease,
    background 0.35s ease, border-color 0.35s ease;
}

.btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-primary {
  background: var(--grad-strong);
  color: #fff;
  box-shadow: var(--shadow-pink);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.45) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 60px -16px rgba(255, 46, 111, 0.7);
}

.btn-primary:hover::after {
  transform: translateX(120%);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 138, 180, 0.6);
  background: rgba(255, 61, 132, 0.1);
}

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled,
.site-header.nav-open {
  background: rgba(18, 6, 16, 0.82);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  overflow: hidden;
  background: linear-gradient(145deg, #ff9ac1 0%, #ff3d84 50%, #b9135a 100%);
  box-shadow: 0 8px 22px -8px rgba(255, 61, 132, 0.8),
    inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  font-size: 0;
  color: transparent;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-text em {
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links > a {
  position: relative;
  padding: 9px 15px;
  font-size: 14.5px;
  color: var(--muted);
  border-radius: 999px;
  transition: color 0.3s ease, background 0.3s ease;
}

.nav-links > a:not(.nav-cta):hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-links .nav-cta {
  margin-left: 10px;
  padding: 11px 22px;
  color: #fff;
  font-weight: 600;
  background: var(--grad-strong);
  box-shadow: 0 10px 26px -12px rgba(255, 46, 111, 0.9);
}

.nav-links .nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -10px rgba(255, 46, 111, 0.95);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.6px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.35s ease, opacity 0.25s ease;
}

.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(6.6px) rotate(45deg);
}

.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-6.6px) rotate(-45deg);
}

/* ==========================================================================
   首屏
   ========================================================================== */
.hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(48px, 8vw, 96px)) 0 0;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(180deg, rgba(255, 61, 132, 0.10) 0%, transparent 42%),
    radial-gradient(1200px 600px at 50% -10%, rgba(255, 88, 152, 0.16), transparent 70%),
    var(--bg);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
  opacity: 0.55;
  pointer-events: none;
}

.hero-glow-a {
  width: 460px;
  height: 460px;
  left: -140px;
  top: 20%;
  background: radial-gradient(circle, rgba(255, 61, 132, 0.5), transparent 65%);
  animation: drift 16s ease-in-out infinite alternate;
}

.hero-glow-b {
  width: 520px;
  height: 520px;
  right: -180px;
  top: 4%;
  background: radial-gradient(circle, rgba(255, 123, 180, 0.34), transparent 68%);
  animation: drift 20s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(40px, -30px, 0) scale(1.12); }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: clamp(24px, 4vw, 56px);
}

.hero-copy {
  padding-bottom: clamp(32px, 5vw, 56px);
}

.hero-copy h1 {
  margin-top: 22px;
  font-size: clamp(2.55rem, 5.4vw, 4.35rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.hero-desc {
  max-width: 30em;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(0.98rem, 1.15vw, 1.06rem);
  line-height: 1.85;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.meta-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  font-size: 13px;
}

.meta-chip i {
  font-style: normal;
  color: var(--muted-2);
  font-size: 12px;
}

.meta-chip b {
  font-weight: 600;
  color: var(--cream);
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: clamp(36px, 5vw, 52px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.hero-stats li {
  padding: 0 clamp(18px, 3vw, 34px);
  border-left: 1px solid var(--line);
}

.hero-stats li:first-child {
  padding-left: 0;
  border-left: 0;
}

.hero-stats b {
  display: block;
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.hero-stats b span {
  margin-left: 3px;
  font-size: 0.62em;
  font-weight: 500;
  color: var(--pink-soft);
}

.hero-stats i {
  font-style: normal;
  font-size: 12px;
  color: var(--muted-2);
  letter-spacing: 0.06em;
}

/* ---------- 截图堆叠 ---------- */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 8px;
}

.shot-stack {
  position: relative;
  width: min(100%, 540px);
  aspect-ratio: 1 / 1.02;
  margin-inline: auto;
}

.shot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 37%;
  aspect-ratio: 9 / 19;
  padding: 7px;
  border-radius: 26px;
  border: 1px solid rgba(255, 138, 180, 0.24);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.13), rgba(255, 61, 132, 0.06) 45%, rgba(18, 6, 16, 0.9));
  box-shadow: 0 34px 70px -26px rgba(0, 0, 0, 0.95), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  cursor: pointer;
  opacity: 0.72;
  z-index: 1;
  transform: translate(-50%, -50%) rotate(var(--rot, 0deg)) translateX(var(--shift, 0)) scale(0.94);
  transition: transform 0.6s cubic-bezier(0.22, 0.9, 0.24, 1), opacity 0.45s ease,
    box-shadow 0.5s ease, border-color 0.4s ease;
  will-change: transform;
}

.shot:nth-child(1) {
  --rot: -8deg;
  --shift: -80%;
}

.shot:nth-child(2) {
  --rot: 1.5deg;
  --shift: 0%;
}

.shot:nth-child(3) {
  --rot: 8deg;
  --shift: 80%;
}

.shot-stack.has-active .shot:not(.is-active) {
  opacity: 0.5;
}

.shot:hover,
.shot.is-active {
  opacity: 1;
  z-index: 6;
  border-color: rgba(255, 138, 180, 0.6);
  box-shadow: 0 40px 80px -24px rgba(0, 0, 0, 0.95),
    0 0 0 1px rgba(255, 138, 180, 0.35),
    0 24px 70px -18px rgba(255, 46, 111, 0.5);
  transform: translate(-50%, -56%) rotate(0deg) translateX(0) scale(1.05);
}

.shot-media {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 20% 12%, rgba(255, 124, 173, 0.55), transparent 60%),
    radial-gradient(90% 70% at 85% 75%, rgba(255, 46, 111, 0.45), transparent 65%),
    linear-gradient(160deg, #2a0f1f 0%, #1b0a14 55%, #2c1020 100%);
  display: grid;
  place-items: center;
}

.shot-media::before {
  content: attr(data-label);
  padding: 7px 14px;
  border: 1px dashed rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.6);
}

.shot-media::after {
  content: "";
  position: absolute;
  inset: auto -30% -45% -30%;
  height: 60%;
  background: radial-gradient(closest-side, rgba(255, 178, 208, 0.28), transparent);
  pointer-events: none;
}

.shot-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  font-size: 0;
  color: transparent;
}

.shot figcaption {
  position: absolute;
  left: 7px;
  right: 7px;
  bottom: 7px;
  padding: 14px 8px 11px;
  border-radius: 0 0 20px 20px;
  background: linear-gradient(180deg, transparent, rgba(12, 3, 9, 0.88));
  font-size: 11px;
  letter-spacing: 0.08em;
  text-align: center;
  color: rgba(255, 241, 246, 0.85);
  pointer-events: none;
}

.shot-hint {
  margin-top: 18px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
}

.float-chip {
  position: absolute;
  z-index: 8;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(30, 11, 23, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--pink-soft);
  box-shadow: 0 16px 36px -18px rgba(0, 0, 0, 0.9);
  pointer-events: none;
  animation: floaty 6s ease-in-out infinite;
}

.float-chip-a {
  top: 12%;
  left: -4%;
}

.float-chip-b {
  right: 0;
  bottom: 16%;
  animation-delay: -3s;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-11px); }
}

/* ---------- 滚动字条 ---------- */
.ticker {
  margin-top: clamp(48px, 7vw, 84px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 17px 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.018);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.ticker-track {
  display: flex;
  width: max-content;
  gap: 26px;
  animation: marquee 34s linear infinite;
}

.ticker-track span {
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--muted);
  white-space: nowrap;
}

.ticker-track span:nth-child(even) {
  color: var(--pink);
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ==========================================================================
   功能
   ========================================================================== */
#features {
  background:
    radial-gradient(900px 500px at 85% 0%, rgba(255, 61, 132, 0.07), transparent 70%),
    var(--bg);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  position: relative;
  padding: 32px 28px 34px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 138, 180, 0.13);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.014));
  overflow: hidden;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.4s ease,
    box-shadow 0.45s ease;
}

.feature-card::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  top: -120px;
  right: -100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 61, 132, 0.24), transparent 68%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-7px);
  border-color: rgba(255, 138, 180, 0.38);
  box-shadow: var(--shadow-soft), 0 0 60px -30px rgba(255, 61, 132, 0.7);
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-bottom: 24px;
  border-radius: 15px;
  border: 1px solid rgba(255, 138, 180, 0.24);
  background: linear-gradient(150deg, rgba(255, 123, 180, 0.22), rgba(255, 46, 111, 0.06));
  color: var(--pink-soft);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 1.16rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.feature-card p {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ==========================================================================
   沉浸体验
   ========================================================================== */
.experience {
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg) 0%, #170a13 45%, var(--bg) 100%);
}

.experience::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 900px;
  height: 900px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 61, 132, 0.09), transparent 62%);
  pointer-events: none;
}

.experience-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(36px, 6vw, 80px);
}

.experience-copy h2 {
  margin-top: 18px;
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.experience-copy .section-desc {
  max-width: 32em;
  margin-top: 22px;
}

.check-list {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14.5px;
  color: var(--muted);
}

.check-list span {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 61, 132, 0.1);
  font-size: 11px;
  font-weight: 600;
  color: var(--pink-soft);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 34px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--pink-soft);
  border-bottom: 1px solid rgba(255, 138, 180, 0.4);
  padding-bottom: 4px;
  transition: color 0.3s ease, gap 0.3s ease;
}

.text-link svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.text-link:hover {
  color: #fff;
  gap: 14px;
}

.chat-stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: 20px;
}

.chat-glow {
  position: absolute;
  width: 78%;
  height: 78%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 61, 132, 0.42), transparent 66%);
  filter: blur(60px);
  pointer-events: none;
}

.chat-card {
  position: relative;
  width: min(100%, 430px);
  border-radius: 26px;
  border: 1px solid rgba(255, 138, 180, 0.22);
  background: linear-gradient(170deg, #24101d 0%, #1a0a14 60%, #22101c 100%);
  box-shadow: 0 40px 90px -34px rgba(0, 0, 0, 0.95), inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  overflow: hidden;
  transform: rotate(-1.2deg);
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.chat-stage:hover .chat-card {
  transform: rotate(0deg) translateY(-6px);
}

.chat-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 138, 180, 0.14);
  background: rgba(255, 255, 255, 0.03);
}

.avatar {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--grad-strong);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.28), 0 8px 20px -10px rgba(255, 46, 111, 0.9);
}

.avatar-char {
  background: linear-gradient(145deg, #ffc0d8, #ff5c9c 55%, #c9165c);
  color: #430d24;
}

.chat-head strong {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.35;
}

.chat-head small {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted-2);
}

.online-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #57e39b;
  box-shadow: 0 0 0 3px rgba(87, 227, 155, 0.16);
}

.chat-tag {
  margin-left: auto;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 61, 132, 0.08);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--pink-soft);
  white-space: nowrap;
}

.chat-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 18px;
  background:
    radial-gradient(80% 50% at 90% 0%, rgba(255, 61, 132, 0.1), transparent 70%);
}

.bubble {
  max-width: 84%;
  padding: 11px 15px;
  font-size: 13.5px;
  line-height: 1.68;
  border-radius: 16px;
}

.bubble-ai {
  align-self: flex-start;
  border-bottom-left-radius: 5px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #f6e3ec;
}

.bubble-me {
  align-self: flex-end;
  border-bottom-right-radius: 5px;
  background: var(--grad-strong);
  color: #fff;
  box-shadow: 0 12px 26px -16px rgba(255, 46, 111, 0.9);
}

.typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: flex-start;
  padding: 12px 16px;
  border-radius: 16px 16px 16px 5px;
  background: rgba(255, 255, 255, 0.05);
}

.typing i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--pink-soft);
  opacity: 0.5;
  animation: typing 1.4s ease-in-out infinite;
}

.typing i:nth-child(2) { animation-delay: 0.2s; }
.typing i:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

.chat-input {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 16px 18px;
  padding: 11px 12px 11px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 138, 180, 0.16);
  background: rgba(255, 255, 255, 0.04);
  font-size: 12.5px;
  color: var(--muted-2);
}

.mic {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--grad-strong);
  color: #fff;
}

.mic svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
}

/* ==========================================================================
   用户评价
   ========================================================================== */
#reviews {
  background: radial-gradient(800px 480px at 12% 20%, rgba(255, 123, 180, 0.07), transparent 68%);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.review-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 30px 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 138, 180, 0.14);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.012));
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.4s ease;
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 138, 180, 0.35);
}

.stars {
  font-size: 13px;
  letter-spacing: 0.28em;
  color: #ff9dbb;
}

.review-card p {
  flex: 1;
  font-size: 14.5px;
  line-height: 1.85;
  color: #e8d1dc;
}

.review-card footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 138, 180, 0.12);
}

.avatar-user {
  width: 40px;
  height: 40px;
  font-size: 14px;
  background: linear-gradient(145deg, rgba(255, 123, 180, 0.34), rgba(255, 46, 111, 0.16));
  border: 1px solid rgba(255, 138, 180, 0.35);
  color: var(--pink-soft);
  box-shadow: none;
}

.review-card footer strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
}

.review-card footer small {
  font-size: 11.5px;
  color: var(--muted-2);
}

/* ==========================================================================
   常见问题
   ========================================================================== */
.faq {
  background: linear-gradient(180deg, var(--bg) 0%, #160912 100%);
}

.faq-inner {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: start;
}

.faq-head {
  position: sticky;
  top: calc(var(--header-h) + 40px);
  margin: 0;
  text-align: left;
}

.faq-head h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
}

.faq-head .section-desc {
  max-width: 22em;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-radius: 18px;
  border: 1px solid rgba(255, 138, 180, 0.14);
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
  transition: border-color 0.35s ease, background 0.35s ease;
}

.faq-item:hover {
  border-color: rgba(255, 138, 180, 0.3);
}

.faq-item.is-open {
  border-color: rgba(255, 138, 180, 0.4);
  background: rgba(255, 61, 132, 0.06);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(255, 138, 180, 0.3);
  transition: background 0.35s ease, transform 0.35s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.5px;
  background: var(--pink-soft);
  transform: translate(-50%, -50%);
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.is-open .faq-icon {
  background: rgba(255, 61, 132, 0.16);
  transform: rotate(180deg);
}

.faq-item.is-open .faq-icon::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.faq-a p {
  padding: 0 24px 22px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ==========================================================================
   下载
   ========================================================================== */
.download {
  padding-bottom: clamp(72px, 9vw, 110px);
}

.download-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.32fr 0.68fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
  padding: clamp(30px, 5vw, 62px);
  border-radius: clamp(24px, 3vw, 38px);
  border: 1px solid rgba(255, 138, 180, 0.28);
  background:
    linear-gradient(120deg, rgba(255, 61, 132, 0.16) 0%, rgba(34, 10, 24, 0.9) 44%, rgba(24, 8, 18, 0.96) 100%),
    #1c0a16;
  overflow: hidden;
  box-shadow: 0 50px 120px -50px rgba(0, 0, 0, 0.95);
}

.download-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 190, 214, 0.16) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(70% 90% at 85% 20%, #000, transparent 72%);
  mask-image: radial-gradient(70% 90% at 85% 20%, #000, transparent 72%);
  opacity: 0.5;
  pointer-events: none;
}

.download-glow {
  position: absolute;
  width: 520px;
  height: 520px;
  right: -160px;
  top: -220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 61, 132, 0.55), transparent 64%);
  filter: blur(40px);
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}

.download-copy,
.download-spec {
  position: relative;
  z-index: 2;
}

.eyebrow-light {
  color: #ffc4d8;
}

.download-copy h2 {
  margin-top: 16px;
  font-size: clamp(2.1rem, 4.4vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.download-desc {
  max-width: 30em;
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: #d5b6c4;
}

.download-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
  max-width: 620px;
}

.store-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), background 0.4s ease,
    border-color 0.4s ease, box-shadow 0.4s ease;
}

.store-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-strong);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.store-btn:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.42);
  box-shadow: 0 22px 44px -20px rgba(255, 46, 111, 0.85);
}

.store-btn:hover::before {
  opacity: 1;
}

.store-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
}

.store-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.store-text {
  display: flex;
  flex-direction: column;
  line-height: 1.35;
  min-width: 0;
}

.store-text small {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.store-text strong {
  font-size: 15.5px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.store-text em {
  font-style: normal;
  font-size: 11px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  margin-left: 2px;
}

.store-arrow {
  margin-left: auto;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #fff;
  transition: transform 0.4s ease, background 0.4s ease;
}

.store-arrow svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.store-btn:hover .store-arrow {
  transform: translateY(2px);
  background: rgba(255, 255, 255, 0.18);
}

.download-note {
  margin-top: 18px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(213, 182, 196, 0.72);
}

/* ---------- 版本信息卡 ---------- */
.download-spec {
  display: flex;
  justify-content: flex-end;
}

.spec-card {
  width: min(100%, 300px);
  padding: 26px 24px;
  border-radius: 24px;
  background: linear-gradient(170deg, #fff5f8 0%, #ffe6ef 60%, #ffd9e7 100%);
  color: #40172b;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.7);
  text-align: center;
}

.spec-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  border-radius: 18px;
  object-fit: cover;
  background: linear-gradient(145deg, #ff9ac1, #ff3d84 55%, #b9135a);
  box-shadow: 0 12px 26px -12px rgba(201, 22, 92, 0.7);
  font-size: 0;
  color: transparent;
}

.spec-name {
  margin-top: 14px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.spec-sub {
  font-size: 11.5px;
  color: #96627c;
  letter-spacing: 0.04em;
}

.spec-list {
  margin-top: 20px;
  border-top: 1px solid rgba(201, 22, 92, 0.14);
}

.spec-list > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(201, 22, 92, 0.1);
  font-size: 12.5px;
}

.spec-list dt {
  color: #96627c;
}

.spec-list dd {
  font-weight: 600;
  color: #521b34;
  text-align: right;
}

.spec-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(201, 22, 92, 0.1);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: #a81850;
}

.spec-badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #ff2e6f;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--line);
  background: #0e040b;
  padding: clamp(44px, 6vw, 68px) 0 26px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr auto;
  gap: 40px;
  align-items: start;
}

.footer-brand p {
  max-width: 24em;
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted-2);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-top: 6px;
}

.footer-links a {
  font-size: 13.5px;
  color: var(--muted);
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--pink-soft);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 6px;
  font-size: 12px;
  color: var(--muted-2);
  text-align: right;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: 22px;
  border-top: 1px solid rgba(255, 138, 180, 0.1);
  font-size: 11.5px;
  color: #7d6271;
}

/* ==========================================================================
   滚动入场
   ========================================================================== */
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s ease var(--d, 0s), transform 0.85s cubic-bezier(0.2, 0.8, 0.2, 1) var(--d, 0s);
}

.js .reveal.in {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hero-copy {
    max-width: 720px;
    padding-bottom: 12px;
  }

  .hero-visual {
    padding-top: 12px;
  }

  .shot-stack {
    width: min(100%, 500px);
  }

  .float-chip-a {
    left: 2%;
  }

  .float-chip-b {
    right: 2%;
  }

  .feature-grid,
  .review-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid .feature-card:last-child,
  .review-grid .review-card:last-child {
    grid-column: span 2;
  }

  .experience-inner {
    grid-template-columns: 1fr;
  }

  .experience-copy {
    max-width: 680px;
  }

  .chat-stage {
    padding-top: 34px;
  }

  .faq-inner {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .faq-head {
    position: static;
    max-width: 620px;
    text-align: center;
    margin-inline: auto;
  }

  .faq-head .section-desc {
    max-width: none;
  }

  .download-panel {
    grid-template-columns: 1fr;
  }

  .download-spec {
    justify-content: flex-start;
  }

  .spec-card {
    width: 100%;
    max-width: none;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 18px;
    text-align: left;
    align-items: center;
  }

  .spec-logo {
    grid-row: span 2;
    margin: 0;
  }

  .spec-name {
    margin-top: 0;
  }

  .spec-list,
  .spec-badge {
    grid-column: 1 / -1;
  }

  .spec-badge {
    justify-self: start;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 68px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px 24px 26px;
    background: rgba(16, 5, 13, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
  }

  .nav-open .nav-links {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-links > a {
    padding: 14px 16px;
    font-size: 15.5px;
    border-radius: 12px;
  }

  .nav-links > a:not(.nav-cta) {
    border-bottom: 1px solid rgba(255, 138, 180, 0.08);
  }

  .nav-links .nav-cta {
    margin: 8px 0 0;
    text-align: center;
    border-bottom: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-meta {
    grid-column: 1 / -1;
    flex-direction: row;
    gap: 20px;
    text-align: left;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(1200px, 100% - 36px);
  }

  .hero-copy h1 {
    font-size: clamp(2.3rem, 10vw, 3rem);
  }

  .hero-stats li {
    padding: 0 18px;
  }

  .feature-grid,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid .feature-card:last-child,
  .review-grid .review-card:last-child {
    grid-column: auto;
  }

  .download-actions {
    grid-template-columns: 1fr;
    max-width: none;
  }

  .store-btn {
    padding: 15px 16px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .shot-stack {
    aspect-ratio: 1 / 1.04;
  }

  .shot {
    width: 42%;
  }

  .shot:nth-child(1) { --shift: -34%; --rot: -7deg; }
  .shot:nth-child(3) { --shift: 34%; --rot: 7deg; }

  .float-chip {
    font-size: 10.5px;
    padding: 7px 12px;
  }

  .float-chip-a { left: 0; top: 8%; }
  .float-chip-b { right: 0; bottom: 20%; }
}

@media (max-width: 460px) {
  .hero-meta {
    gap: 8px;
  }

  .meta-chip {
    padding: 7px 13px;
    font-size: 12px;
  }

  .hero-actions .btn {
    flex: 1;
    padding: 14px 18px;
  }

  .hero-stats {
    gap: 14px 0;
  }

  .hero-stats li {
    padding: 0 14px;
  }

  .hero-stats li:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .shot {
    width: 45%;
    padding: 6px;
    border-radius: 22px;
  }

  .shot-media {
    border-radius: 17px;
  }

  .shot figcaption {
    font-size: 10px;
  }

  .float-chip {
    display: none;
  }

  .faq-q {
    padding: 18px 18px;
    font-size: 14.5px;
  }

  .faq-a p {
    padding: 0 18px 20px;
  }

  .chat-card {
    transform: none;
  }

  .download-panel {
    padding: 26px 20px;
  }

  .spec-card {
    padding: 22px 18px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}