:root {
  --bg: #f7f9ff;
  --bg-soft: #fbfcff;
  --white: #ffffff;
  --ink: #101a33;
  --ink-soft: #33405c;
  --muted: #77839c;
  --muted-light: #a4adc1;
  --line: #e8edf8;
  --line-strong: #dbe3f2;
  --accent: #5b6cff;
  --accent-deep: #4352e8;
  --violet: #9b6cff;
  --peach: #ffb7a5;
  --mint: #9be7d0;
  --green: #35b68e;
  --shadow-sm: 0 8px 24px rgba(62, 76, 120, 0.06);
  --shadow-md: 0 22px 60px rgba(62, 76, 120, 0.1);
  --shadow-lg: 0 32px 90px rgba(62, 76, 120, 0.14);
  --radius: 26px;
  --font: "Segoe UI Variable Text", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --display: "Segoe UI Variable Display", "Bahnschrift", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 0.8, 0.2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-ready [data-reveal] { will-change: transform, opacity; }
::selection { background: rgba(91, 108, 255, 0.18); }

a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }
h1, h2, h3, p, figure { margin: 0; }
ul { padding: 0; margin: 0; list-style: none; }
code { font-family: "Cascadia Code", "Consolas", monospace; }

.icon {
  width: 18px;
  height: 18px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
}
.icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 50% at 10% 0%, rgba(214, 224, 255, 0.65), transparent 65%),
    radial-gradient(ellipse 55% 45% at 92% 14%, rgba(243, 226, 255, 0.6), transparent 68%),
    radial-gradient(ellipse 60% 45% at 70% 100%, rgba(255, 235, 222, 0.55), transparent 70%),
    linear-gradient(180deg, #f8faff 0%, #fbf9ff 45%, #fffaf6 100%);
}
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.65;
}
.bg-orb--one {
  width: 440px; height: 440px; left: -160px; top: 120px;
  background: rgba(190, 204, 255, 0.55);
  animation: floatOne 16s ease-in-out infinite alternate;
}
.bg-orb--two {
  width: 380px; height: 380px; right: -120px; top: 38%;
  background: rgba(238, 210, 255, 0.45);
  animation: floatTwo 20s ease-in-out infinite alternate;
}
.bg-orb--three {
  width: 420px; height: 320px; left: 35%; bottom: -150px;
  background: rgba(255, 218, 200, 0.4);
  animation: floatThree 18s ease-in-out infinite alternate;
}
@keyframes floatOne { to { transform: translate3d(40px, 40px, 0) scale(1.08); } }
@keyframes floatTwo { to { transform: translate3d(-46px, 28px, 0) scale(0.94); } }
@keyframes floatThree { to { transform: translate3d(30px, -30px, 0) scale(1.05); } }
.bg-grid {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: radial-gradient(rgba(96, 113, 160, 0.14) 0.7px, transparent 0.7px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 72%);
}

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  padding: 18px 28px;
  transition: padding 0.3s var(--ease), background 0.3s, border-color 0.3s, box-shadow 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  padding: 10px 28px;
  background: rgba(250, 252, 255, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: rgba(220, 228, 244, 0.85);
  box-shadow: 0 10px 30px rgba(62, 76, 120, 0.05);
}
.nav-inner {
  width: min(1200px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--accent), var(--violet));
  color: #fff;
  box-shadow: 0 8px 18px rgba(91, 108, 255, 0.24);
}
.brand-mark .icon { width: 21px; height: 21px; }
.brand-name {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}
.nav-links a {
  position: relative;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: translateX(-50%);
  transition: width 0.25s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 16px; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-cta {
  height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 17px;
  border-radius: 12px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  transition: transform 0.2s var(--ease), box-shadow 0.2s, background 0.2s;
}
.nav-cta .icon { width: 14px; height: 14px; }
.nav-cta:hover { background: #1d2b4d; transform: translateY(-1px); box-shadow: 0 10px 22px rgba(16, 26, 51, 0.16); }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255,255,255,0.7);
  color: var(--ink);
  place-items: center;
}
.mobile-menu {
  display: none;
  width: min(1200px, 100%);
  margin: 10px auto 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.94);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}
.mobile-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 13px;
}
.mobile-menu a:hover { background: #f4f7ff; }
.mobile-menu .mobile-download {
  margin-top: 4px;
  background: var(--ink);
  color: #fff;
}

/* ============================================================
   通用
   ============================================================ */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.eyebrow > span {
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.65;
}
.eyebrow--light { color: rgba(255,255,255,0.72); }
.section {
  width: min(1200px, calc(100% - 56px));
  margin: 0 auto;
  padding: 112px 0;
}
.section-heading h2 {
  font-family: var(--display);
  font-size: clamp(34px, 4.3vw, 56px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.045em;
}
.section-heading h2 em {
  font-style: normal;
  color: var(--accent);
}
.section-heading > p:not(.eyebrow) {
  max-width: 600px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}
.section-heading--split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}
.section-heading--split > p {
  max-width: 330px;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.section-heading--center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-heading--center .eyebrow { justify-content: center; }
.section-heading--center > p:not(.eyebrow) { max-width: 520px; }
.button {
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.22s var(--ease), box-shadow 0.22s, background 0.22s, border-color 0.22s;
}
.button .icon { width: 17px; height: 17px; }
.button--primary {
  background: linear-gradient(135deg, #6474ff, #8c66ff);
  color: #fff;
  box-shadow: 0 14px 30px rgba(91, 108, 255, 0.24);
}
.button--primary:hover { transform: translateY(-2px); box-shadow: 0 20px 38px rgba(91, 108, 255, 0.3); }
.button--soft {
  border-color: var(--line-strong);
  background: rgba(255,255,255,0.7);
  color: var(--ink-soft);
}
.button--soft:hover { background: #fff; border-color: #cdd8ef; transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.button--light {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 14px 30px rgba(25, 39, 76, 0.12);
}
.button--light:hover { transform: translateY(-2px); box-shadow: 0 20px 40px rgba(25, 39, 76, 0.18); }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 26px;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 600;
}
.text-link .icon { width: 14px; height: 14px; transition: transform 0.2s; }
.text-link:hover .icon { transform: translateX(4px); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  width: min(1200px, calc(100% - 56px));
  margin: 0 auto;
  min-height: 100vh;
  padding: 154px 0 90px;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  align-items: center;
  gap: 54px;
}
.hero-copy { position: relative; z-index: 2; }
.hero h1 {
  margin: 20px 0 0;
  font-family: var(--display);
  font-size: clamp(46px, 6.3vw, 82px);
  line-height: 1.04;
  font-weight: 600;
  letter-spacing: -0.06em;
  color: var(--ink);
}
.hero h1 em {
  display: block;
  font-style: normal;
  color: transparent;
  background: linear-gradient(100deg, #5b6cff 0%, #9b6cff 55%, #ff9f86 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-description {
  max-width: 490px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
}
.download-note {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
  color: var(--muted-light);
  font-size: 10px;
}
.download-note .icon { width: 13px; height: 13px; color: var(--muted); }
.download-note > span:not(.icon) { width: 3px; height: 3px; border-radius: 50%; background: #c7cfdf; }
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.hero-badges > span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 25px;
  padding: 0 9px;
  border: 1px solid rgba(220, 228, 244, 0.9);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255,255,255,0.45);
  font-size: 9px;
}
.hero-badges .icon { width: 11px; height: 11px; color: var(--green); }

.hero-visual {
  position: relative;
  min-width: 0;
  padding: 20px 0 30px;
}
.hero-glow {
  position: absolute;
  inset: 8% 3% 2% 8%;
  border-radius: 50%;
  background: linear-gradient(130deg, rgba(181, 195, 255, 0.55), rgba(243, 208, 255, 0.48) 52%, rgba(255, 213, 194, 0.45));
  filter: blur(55px);
  opacity: 0.8;
}
.hero-shot {
  position: relative;
  z-index: 2;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 44px 100px rgba(68, 82, 130, 0.2);
  transform: perspective(1600px) rotateY(-2.5deg) rotateX(1.5deg);
  animation: heroFloat 7s ease-in-out infinite alternate;
}
.hero-shot img { width: 100%; height: auto; }
@keyframes heroFloat {
  from { transform: perspective(1600px) rotateY(-2.5deg) rotateX(1.5deg) translateY(0); }
  to { transform: perspective(1600px) rotateY(-1deg) rotateX(0.5deg) translateY(-11px); }
}
.float-card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 14px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 16px 34px rgba(62, 76, 120, 0.13);
  backdrop-filter: blur(12px);
  animation: floatCard 6s ease-in-out infinite alternate;
}
.float-card--1 { left: -20px; bottom: 12%; }
.float-card--2 { right: -14px; top: 7%; animation-delay: -2.5s; }
.float-icon {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: linear-gradient(140deg, #eef2ff, #f6efff);
  color: var(--accent);
}
.float-icon .icon { width: 15px; height: 15px; }
.float-card b { display: block; color: var(--ink); font-size: 9.5px; font-weight: 700; }
.float-card small { display: block; margin-top: 2px; color: var(--muted); font-size: 8px; }
@keyframes floatCard {
  from { transform: translateY(0); }
  to { transform: translateY(-8px); }
}

/* ============================================================
   Trust
   ============================================================ */
.trust {
  width: min(1200px, calc(100% - 56px));
  margin: 0 auto;
  padding: 0 0 84px;
}
.trust-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.trust-item {
  min-height: 84px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 26px 22px;
  border-right: 1px solid var(--line);
}
.trust-item:last-child { border-right: 0; }
.trust-item strong {
  font-family: var(--display);
  font-size: 25px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.trust-item span { color: var(--muted); font-size: 10px; }
.trust-item--mark { justify-content: flex-end; }
.trust-mark {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-family: var(--display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.trust-item--mark span:last-child { color: var(--muted); font-size: 9px; }

/* ============================================================
   Intro
   ============================================================ */
.intro { padding-top: 18px; }
.intro .section-heading { max-width: 720px; }
.intro-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 52px;
}
.intro-point {
  padding: 27px 25px 25px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,0.58);
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
}
.intro-point:hover { transform: translateY(-5px); border-color: #d9e3f7; box-shadow: var(--shadow-md); }
.point-index { color: var(--accent); font-family: var(--display); font-size: 11px; letter-spacing: 0.12em; }
.intro-point h3 { margin-top: 22px; font-size: 16px; font-weight: 600; }
.intro-point p { margin-top: 9px; color: var(--muted); font-size: 12px; line-height: 1.8; }

/* ============================================================
   Features
   ============================================================ */
.features { padding-top: 60px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 46px;
}
.feature-card {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,0.62);
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #dbe5f8; }
.feature-icon {
  width: 39px; height: 39px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: linear-gradient(145deg, #eef2ff, #f8f0ff);
  color: var(--accent);
  border: 1px solid #e7ebff;
}
.feature-icon .icon { width: 18px; height: 18px; }
.feature-card h3 { margin-top: 22px; font-size: 15px; font-weight: 600; }
.feature-card p { margin-top: 8px; color: var(--muted); font-size: 12px; line-height: 1.8; }

/* ============================================================
   Showcase
   ============================================================ */
.showcase {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  align-items: center;
  gap: 68px;
}
.showcase-copy h2 {
  margin-top: 18px;
  font-family: var(--display);
  font-size: clamp(34px, 4.2vw, 54px);
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: -0.045em;
}
.showcase-copy > p:not(.eyebrow) { margin-top: 18px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.check-list { margin-top: 24px; display: grid; gap: 11px; }
.check-list li { display: flex; gap: 9px; color: var(--ink-soft); font-size: 11.5px; }
.check-list .icon { width: 15px; height: 15px; color: var(--green); margin-top: 2px; }
.showcase-visual {
  position: relative;
  border-radius: 25px;
  padding: 12px;
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-lg);
  transform: rotate(1deg);
  transition: transform 0.4s var(--ease);
}
.showcase-visual:hover { transform: rotate(0deg) translateY(-4px); }
.showcase-visual img { border-radius: 17px; }
.showcase-visual figcaption {
  position: absolute;
  left: 28px;
  bottom: -15px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: 9px;
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   Tutorial
   ============================================================ */
.tutorial {
  padding-top: 130px;
}
.tutorial-list {
  display: flex;
  flex-direction: column;
  gap: 74px;
  margin-top: 70px;
}
.tutorial-step {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  align-items: center;
  gap: 64px;
}
.tutorial-step--reverse .tutorial-image { order: 2; }
.tutorial-step--reverse .tutorial-copy { order: 1; padding-left: 20px; }
.tutorial-image {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-lg);
  background: #fff;
}
.tutorial-image::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
  pointer-events: none;
}
.tutorial-image img { width: 100%; height: auto; }
.tutorial-copy { max-width: 400px; }
.step-number {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-family: var(--display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
}
.step-number::before { content: ""; width: 22px; height: 1px; background: var(--accent); opacity: 0.55; }
.tutorial-copy h3 { margin-top: 14px; font-family: var(--display); font-size: clamp(24px, 2.8vw, 36px); font-weight: 600; letter-spacing: -0.035em; }
.tutorial-copy > p { margin-top: 14px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.step-tip {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 20px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(244, 247, 255, 0.86);
  color: #6c7892;
  font-size: 10px;
  line-height: 1.7;
}
.step-tip .icon { width: 13px; height: 13px; color: var(--violet); margin-top: 1px; }

/* ============================================================
   Download
   ============================================================ */
.download { padding-top: 70px; }
.download-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 40px;
  padding: 52px;
  border-radius: 30px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.9);
  background:
    radial-gradient(circle at 84% 8%, rgba(255,255,255,0.8), transparent 40%),
    linear-gradient(120deg, #eef3ff 0%, #f2eeff 46%, #fff1e9 100%);
  box-shadow: var(--shadow-lg);
}
.download-panel-glow {
  position: absolute;
  width: 380px; height: 380px;
  right: -120px; bottom: -190px;
  border-radius: 50%;
  background: rgba(255, 197, 177, 0.3);
  filter: blur(30px);
}
.download-copy { position: relative; z-index: 1; }
.download-copy .eyebrow { color: var(--accent); }
.download-copy h2 { margin-top: 18px; font-family: var(--display); font-size: clamp(36px, 4.4vw, 58px); line-height: 1.1; font-weight: 600; letter-spacing: -0.05em; }
.download-copy > p:not(.eyebrow) { max-width: 420px; margin-top: 16px; color: #6f7b96; font-size: 14px; line-height: 1.8; }
.download-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 26px; }
.download-secondary { display: inline-flex; align-items: center; gap: 6px; color: #5b6b89; font-size: 11px; font-weight: 600; }
.download-secondary .icon { width: 13px; height: 13px; }
.download-caption { margin-top: 13px !important; color: #9aa4b8 !important; font-size: 9.5px !important; }
.download-card {
  position: relative;
  z-index: 1;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.72);
  box-shadow: 0 18px 40px rgba(62, 76, 120, 0.09);
  backdrop-filter: blur(10px);
  align-self: start;
}
.download-card-head { display: flex; align-items: center; justify-content: space-between; }
.download-card-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; background: var(--ink); color: #fff; }
.download-card-icon .icon { width: 19px; height: 19px; }
.download-card-state { display: inline-flex; align-items: center; gap: 5px; color: var(--green); font-size: 8px; font-weight: 600; }
.download-card-state i { width: 4px; height: 4px; border-radius: 50%; background: currentColor; }
.download-file { display: block; margin-top: 18px; font-family: var(--display); font-size: 17px; letter-spacing: -0.01em; }
.download-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 17px 0 0; padding: 15px 0; border-top: 1px solid #edf1f9; border-bottom: 1px solid #edf1f9; }
.download-meta div { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; }
.download-meta dt { color: #9aa4b8; font-size: 8.5px; }
.download-meta dd { margin: 0; color: #37425a; font-size: 9.5px; font-weight: 600; }
.download-requirements { margin-top: 15px; }
.download-requirements > span { color: #9aa4b8; font-size: 8px; letter-spacing: 0.04em; }
.download-requirements p { display: flex; gap: 6px; margin-top: 7px; color: #67748e; font-size: 9px; line-height: 1.5; }
.download-requirements .icon { width: 11px; height: 11px; color: var(--green); margin-top: 1px; }

/* ============================================================
   FAQ
   ============================================================ */
.faq { padding-top: 30px; }
.faq-list { max-width: 820px; margin: 38px auto 0; }
.faq-item {
  border-bottom: 1px solid var(--line);
  transition: border-color 0.2s;
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 21px 2px;
  list-style: none;
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 600;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 8px; background: rgba(255,255,255,0.7); border: 1px solid var(--line); color: var(--muted); transition: transform 0.25s, color 0.25s; }
.faq-item summary i .icon { width: 12px; height: 12px; transform: rotate(90deg); transition: transform 0.25s; }
.faq-item[open] summary i { color: var(--accent); }
.faq-item[open] summary i .icon { transform: rotate(-90deg); }
.faq-answer { padding: 0 44px 21px 2px; }
.faq-answer p { color: var(--muted); font-size: 11.5px; line-height: 1.85; }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  width: min(1200px, calc(100% - 56px));
  margin: 0 auto;
  padding: 68px 0 30px;
  border-top: 1px solid var(--line);
}
.footer-main { display: flex; justify-content: space-between; gap: 60px; }
.footer-brand { max-width: 300px; }
.footer-brand p { margin-top: 13px; color: var(--muted); font-size: 11px; }
.footer-badge { display: inline-flex; align-items: center; gap: 5px; margin-top: 18px; padding: 5px 8px; border-radius: 7px; border: 1px solid var(--line); color: var(--muted-light); font-size: 8px; }
.footer-badge .icon { width: 10px; height: 10px; }
.footer-columns { display: flex; gap: 78px; }
.footer-column { display: flex; flex-direction: column; gap: 10px; }
.footer-column b { margin-bottom: 4px; color: var(--ink-soft); font-size: 10px; font-weight: 700; }
.footer-column a { color: var(--muted); font-size: 10px; transition: color 0.2s; }
.footer-column a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 58px; padding-top: 18px; border-top: 1px solid rgba(232, 237, 248, 0.7); color: var(--muted-light); font-size: 8.5px; }

/* ============================================================
   动效 / 杂项
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-delay="1"] { transition-delay: 0.08s; }
[data-delay="2"] { transition-delay: 0.16s; }
[data-delay="3"] { transition-delay: 0.24s; }
.noscript { padding: 80px 24px; text-align: center; color: var(--ink); }

@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; padding-top: 138px; gap: 30px; }
  .hero-copy { max-width: 680px; }
  .hero-visual { max-width: 760px; width: 100%; margin: 0 auto; }
  .hero h1 { font-size: clamp(46px, 7vw, 70px); }
  .trust-inner { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(2) { border-right: 0; }
  .trust-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .trust-item--mark { justify-content: flex-start; }
  .intro-points, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase { grid-template-columns: 1fr; gap: 36px; }
  .showcase-copy { max-width: 650px; }
  .tutorial-step { gap: 36px; }
  .download-panel { padding: 38px; grid-template-columns: 1fr; }
  .download-card { max-width: 520px; }
  .section { padding: 86px 0; }
}

@media (max-width: 820px) {
  .nav { padding: 12px 18px; }
  .nav.is-scrolled { padding: 8px 18px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: grid; }
  .mobile-menu:not([hidden]) { display: block; }
  .hero, .section, .trust, .footer { width: min(100% - 36px, 1200px); }
  .hero { padding-top: 124px; }
  .hero-shot { transform: none; animation: none; border-radius: 22px; }
  .float-card--1 { left: -8px; bottom: 8%; }
  .float-card--2 { right: -6px; top: 5%; }
  .section-heading--split { flex-direction: column; align-items: flex-start; gap: 14px; }
  .section-heading--split > p { margin: 0; }
  .intro-points, .feature-grid { grid-template-columns: 1fr; }
  .intro-points { margin-top: 36px; }
  .tutorial-list { gap: 46px; margin-top: 48px; }
  .tutorial-step, .tutorial-step--reverse { grid-template-columns: 1fr; gap: 18px; }
  .tutorial-step--reverse .tutorial-image,
  .tutorial-step--reverse .tutorial-copy { order: initial; }
  .tutorial-step--reverse .tutorial-copy { padding-left: 0; }
  .tutorial-copy { max-width: none; }
  .tutorial-image { border-radius: 18px; }
  .download-panel { padding: 28px; border-radius: 22px; }
  .download-copy h2 { font-size: clamp(34px, 7vw, 48px); }
  .footer-main { flex-direction: column; gap: 40px; }
  .footer-columns { gap: 54px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .trust { padding-bottom: 56px; }
  .trust-item { padding: 20px 14px; }
  .trust-item strong { font-size: 22px; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: 45px; }
  .hero-description { font-size: 13.5px; }
  .hero-actions .button { width: 100%; }
  .hero-badges { gap: 6px; }
  .float-card { padding: 8px 10px; }
  .float-card small { display: none; }
  .trust-inner { grid-template-columns: 1fr 1fr; }
  .trust-item--mark { display: none; }
  .download-panel { padding: 22px; }
  .download-card { padding: 18px; }
  .download-file { font-size: 15px; }
  .section { padding: 68px 0; }
  .section-heading h2 { font-size: 35px; }
  .eyebrow { font-size: 9px; }
  .faq-answer { padding-right: 16px; }
  .faq-item summary { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ============================================================
   lumakey 3.1 · 真实界面 / 主题 / 大图
   ============================================================ */
.screens-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(300px, 0.58fr);
  gap: 24px;
  align-items: start;
  margin-top: 44px;
}
.screens-main {
  margin: 0;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.screen-open {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}
.screen-open img { display: block; width: 100%; height: auto; }
.screens-main figcaption {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 22px 20px;
  border-top: 1px solid var(--line);
}
.screens-main figcaption strong { font-family: var(--display); font-size: 17px; letter-spacing: -.2px; }
.screens-main figcaption span { color: var(--muted); font-size: 12.5px; }
.screens-thumbs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-height: 610px;
  overflow: auto;
  padding: 2px 6px 2px 2px;
  scrollbar-width: thin;
}
.screen-thumb {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  color: var(--muted);
  font-size: 11px;
  text-align: left;
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.screen-thumb:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-sm); }
.screen-thumb img { width: 100%; height: auto; border-radius: 9px; display: block; }
.screen-thumb span { padding: 0 3px 2px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.screen-thumb.is-active { border-color: var(--accent); color: var(--accent-deep); box-shadow: 0 10px 26px rgba(91,108,255,.14); }

.theme-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 40px;
}
.theme-card {
  margin: 0;
  padding: 7px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.theme-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow-md); }
.theme-open { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; }
.theme-open img { width: 100%; height: auto; border-radius: 12px; display: block; }
.theme-card figcaption { display: flex; flex-direction: column; gap: 2px; padding: 9px 5px 4px; }
.theme-card figcaption b { font-size: 12px; color: var(--ink); }
.theme-card figcaption span { font-size: 10px; color: var(--muted); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 34px;
  background: rgba(7, 12, 28, .84);
  backdrop-filter: blur(10px);
}
.lightbox[hidden] { display: none; }
.lightbox figure { margin: 0; max-width: 94vw; max-height: 92vh; text-align: center; }
.lightbox img {
  display: block;
  max-width: 94vw;
  max-height: 84vh;
  margin: 0 auto;
  border-radius: 16px;
  box-shadow: 0 30px 90px rgba(0,0,0,.4);
}
.lightbox figcaption { margin-top: 12px; color: #e9edf8; font-size: 12px; letter-spacing: .2px; }
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  color: #fff;
  font-size: 24px;
  line-height: 1;
}
.lightbox-close:hover { background: rgba(255,255,255,.2); }
body.is-locked { overflow: hidden; }

@media (max-width: 1180px) {
  .screens-layout { grid-template-columns: 1fr; }
  .screens-thumbs { grid-template-columns: repeat(3, minmax(0, 1fr)); max-height: 380px; }
  .theme-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .screens-thumbs { grid-template-columns: repeat(2, minmax(0, 1fr)); max-height: 360px; }
  .theme-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lightbox { padding: 16px; }
}
@media (max-width: 560px) {
  .screens-thumbs { grid-template-columns: 1fr 1fr; max-height: 300px; }
  .theme-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .theme-card { padding: 5px; border-radius: 14px; }
  .theme-card figcaption span { display: none; }
}

/* lumakey: longer card-key hero title, keep it on two lines */
@media (min-width: 821px) {
  .hero h1 { font-size: clamp(48px, 4.2vw, 64px); }
}

/* lumakey: client app icon replaces the generic L mark */
.brand-mark--image {
  background: none;
  box-shadow: 0 6px 16px rgba(62, 76, 120, .14);
  overflow: hidden;
  padding: 0;
}
.brand-mark--image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ============================================================
   免费本地使用 / 免责声明
   ============================================================ */
.notice { padding-top: 70px; }
.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 38px;
}
.notice-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow-sm);
}
.notice-icon {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: rgba(91,108,255,.09);
  color: var(--accent);
  margin-bottom: 13px;
}
.notice-icon .icon { width: 19px; height: 19px; }
.notice-card h3 { font-size: 14px; margin-bottom: 6px; }
.notice-card p { color: var(--muted); font-size: 12px; line-height: 1.75; }

.disclaimer-card {
  max-width: 980px;
  margin: 38px auto 0;
  padding: 26px 30px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-md);
}
.free-use-box {
  padding: 15px 18px;
  border-radius: 14px;
  border: 1px solid rgba(91,108,255,.16);
  background: rgba(91,108,255,.055);
  margin-bottom: 20px;
}
.free-use-box b { color: var(--accent-deep); font-size: 13px; }
.free-use-box p { color: var(--muted); font-size: 12px; line-height: 1.8; margin-top: 4px; }
.disclaimer-list {
  list-style: none;
  counter-reset: disclaimer;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.disclaimer-list li {
  counter-increment: disclaimer;
  position: relative;
  padding-left: 30px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}
.disclaimer-list li::before {
  content: counter(disclaimer) ".";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
@media (max-width: 1080px) {
  .notice-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .disclaimer-card { padding: 20px; }
  .notice-card { padding: 18px; }
}




/* Heading layout: big title first, eyebrow small label below */
.section-heading {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.section-heading h2 { order: 1; }
.section-heading .eyebrow {
  order: 2;
  margin-top: 10px;
  margin-bottom: 8px;
}
.section-heading > p:not(.eyebrow) { order: 3; }
.section-heading--center { align-items: center; }
.section-heading--split > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.section-heading--split > div h2 { order: 1; }
.section-heading--split > div .eyebrow {
  order: 2;
  margin-top: 8px;
  margin-bottom: 0;
}
@media (min-width: 821px) { .section-heading--split { flex-direction: row; } }



/* Section pages: only the selected group is visible */
[hidden] { display: none !important; }
.nav-links a.is-active { color: var(--ink); }
.nav-links a.is-active::after { width: 16px; }
.mobile-menu a.is-active { color: var(--accent-deep); background: rgba(91,108,255,.08); }

/* When a nav page is selected, clear the fixed header and put the page at the top */
body.is-page-mode .features,
body.is-page-mode .screens,
body.is-page-mode .themes,
body.is-page-mode .tutorial,
body.is-page-mode .download,
body.is-page-mode .disclaimer,
body.is-page-mode .faq {
  padding-top: 112px;
}

/* Extra content blocks for richer pages */
.page-highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}
.page-highlight-card {
  padding: 21px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow-sm);
}
.page-highlight-icon {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(91,108,255,.09);
  color: var(--accent);
  margin-bottom: 12px;
}
.page-highlight-icon .icon { width: 18px; height: 18px; }
.page-highlight-card h3 { font-size: 13.5px; margin-bottom: 6px; }
.page-highlight-card p { color: var(--muted); font-size: 12px; line-height: 1.75; }
@media (max-width: 900px) {
  .page-highlight-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Softer colorful backdrop + interactive cursor + transitions
   ============================================================ */
:root {
  --bg: #dfe5ff;
  --bg-soft: #f0e9ff;
}
body {
  background: var(--bg);
}
#site {
  position: relative;
  z-index: 1;
}
.page-bg {
  background:
    radial-gradient(ellipse 78% 55% at 8% 0%, rgba(156, 171, 255, 0.58), transparent 65%),
    radial-gradient(ellipse 55% 48% at 96% 10%, rgba(255, 183, 163, 0.48), transparent 68%),
    radial-gradient(ellipse 60% 50% at 58% 100%, rgba(147, 231, 208, 0.38), transparent 72%),
    linear-gradient(135deg, #dfe5ff 0%, #e9ddff 46%, #ffe3d4 100%);
}
.bg-orb--one { background: rgba(154, 174, 255, 0.55); }
.bg-orb--two { background: rgba(221, 186, 255, 0.48); }
.bg-orb--three { background: rgba(255, 196, 170, 0.42); }
.bg-grid { opacity: 0.32; }

/* Cursor glow follows the pointer */
.cursor-aura,
.cursor-ring {
  position: fixed;
  left: 0;
  top: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.25s ease;
  will-change: transform;
}
.cursor-aura {
  width: 260px;
  height: 260px;
  margin: -130px 0 0 -130px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(112, 130, 255, 0.30), rgba(255, 175, 148, 0.16) 46%, transparent 72%);
  filter: blur(16px);
  mix-blend-mode: multiply;
}
.cursor-ring {
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  border-radius: 50%;
  border: 1px solid rgba(78, 96, 230, 0.48);
  box-shadow: 0 0 18px rgba(112, 130, 255, 0.25);
  background: rgba(255, 255, 255, 0.06);
}
body.cursor-active .cursor-aura,
body.cursor-active .cursor-ring { opacity: 1; }
.cursor-aura.is-hover { opacity: 0.86; }
.cursor-ring.is-hover {
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border-color: rgba(78, 96, 230, 0.7);
}

/* Smooth page switch */
.page-enter { animation: pageEnter 0.4s cubic-bezier(0.22, 0.8, 0.2, 1); }
@keyframes pageEnter { from { transform: translate3d(0, 12px, 0); } to { transform: none; } }

/* Silky button/card hover motion */
.button,
.nav-cta,
.download-secondary,
.screen-thumb,
.theme-open,
.faq-item,
.page-highlight-card,
.notice-card,
.feature-card,
.theme-card {
  transition:
    transform 0.35s var(--ease),
    box-shadow 0.35s var(--ease),
    background-color 0.35s var(--ease),
    border-color 0.35s var(--ease),
    color 0.25s ease;
}
.button:hover { transform: translateY(-3px) scale(1.012); }
.button:active { transform: translateY(0) scale(0.99); }
.nav-cta:hover { transform: translateY(-2px) scale(1.02); }
.screen-thumb:hover,
.theme-card:hover,
.page-highlight-card:hover,
.notice-card:hover,
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(62, 76, 120, 0.12);
}
.faq-item:hover { border-color: rgba(91, 108, 255, 0.22); }

@media (prefers-reduced-motion: reduce) {
  .cursor-aura, .cursor-ring, .page-enter { display: none !important; }
  .button, .nav-cta, .download-secondary, .screen-thumb, .theme-open,
  .faq-item, .page-highlight-card, .notice-card, .feature-card, .theme-card {
    transition: none !important;
  }
}



/* stronger, clearly visible pointer glow */
.cursor-aura {
  width: 320px;
  height: 320px;
  margin: -160px 0 0 -160px;
  background:
    radial-gradient(circle, rgba(91, 108, 255, 0.34) 0%, rgba(255, 150, 120, 0.18) 43%, rgba(255, 220, 180, 0.08) 62%, transparent 74%);
  filter: blur(14px);
  mix-blend-mode: normal;
}
.cursor-ring {
  border-color: rgba(78, 96, 230, 0.65);
  box-shadow: 0 0 24px rgba(112, 130, 255, 0.45), inset 0 0 12px rgba(255, 255, 255, 0.5);
}

/* Star-trail pointer effect (no center ball) */
.cursor-aura, .cursor-ring { display: none !important; }
.cursor-spark {
  position: fixed;
  left: 0;
  top: 0;
  display: block;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.22s ease;
  clip-path: polygon(50% 0%, 61% 38%, 100% 50%, 61% 62%, 50% 100%, 39% 62%, 0% 50%, 39% 38%);
  filter: drop-shadow(0 0 3px rgba(28, 38, 80, 0.45)) drop-shadow(0 0 6px rgba(255, 255, 255, 0.55));
  animation: sparkTwinkle 1.4s ease-in-out infinite alternate;
  will-change: transform;
}
body.cursor-active .cursor-spark { opacity: var(--o, 0.8); }
body.cursor-hover .cursor-spark { filter: drop-shadow(0 0 8px rgba(255, 255, 255, 1)) brightness(1.25); }
@keyframes sparkTwinkle {
  from { filter: drop-shadow(0 0 3px rgba(28,38,80,.38)) brightness(.95); }
  to { filter: drop-shadow(0 0 5px rgba(28,38,80,.55)) brightness(1.12); }
}
@media (prefers-reduced-motion: reduce) {
  .cursor-spark { display: none !important; }
}


/* Ensure stars are visible immediately after pointer activation */
.cursor-spark {
  opacity: 0;
  transition: none;
}
body.cursor-active .cursor-spark {
  opacity: 0.92 !important;
}

/* Use crisp diamond-shaped sparks (no ball, no clip/filter compositing issues) */
.cursor-spark {
  clip-path: none !important;
  filter: none !important;
  border-radius: 2px;
  box-shadow: 0 0 7px rgba(36, 48, 110, 0.5);
  animation: none !important;
  opacity: 0;
}
body.cursor-active .cursor-spark { opacity: 0.95 !important; }