:root {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #14213d;
  background: #f7f9fe;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: radial-gradient(circle at 78% 8%, #e8f0ff 0, transparent 27%), #f7f9fe; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid #fdba48; outline-offset: 4px; }

.site-shell { width: min(100% - 72px, 1190px); margin: 0 auto; }
.site-header { min-height: 92px; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #14213d; text-decoration: none; font-size: 1.33rem; font-weight: 850; letter-spacing: .03em; }
.brand img { border-radius: 11px; box-shadow: 0 8px 20px rgba(47, 98, 221, .16); }
.site-header nav { display: flex; align-items: center; gap: 32px; margin-left: auto; }
.site-header nav a { color: #52617e; text-decoration: none; font-size: .94rem; font-weight: 650; transition: color .2s ease; }
.site-header nav a:hover, .site-footer a:hover { color: #315fda; }
.header-action { display: inline-flex; align-items: center; gap: 13px; padding: 11px 18px; border: 1px solid #d8e2f7; border-radius: 999px; color: #2854c6; background: #fff; text-decoration: none; font-size: .9rem; font-weight: 750; box-shadow: 0 5px 18px rgba(29, 56, 119, .04); }
.header-action:hover { border-color: #9fbaff; background: #f6f9ff; }

.hero { min-height: 614px; display: grid; grid-template-columns: minmax(0, 1.07fr) minmax(390px, .93fr); align-items: center; gap: 34px; padding: 49px 0 106px; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 9px 14px; border: 1px solid #d9e6ff; border-radius: 999px; color: #315fce; background: #eef4ff; font-size: .8rem; font-weight: 800; letter-spacing: .04em; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: #3578ff; box-shadow: 0 0 0 4px #d5e4ff; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 25px 0 25px; font-size: clamp(3.1rem, 5.4vw, 5.25rem); line-height: 1.17; letter-spacing: -.055em; font-weight: 850; }
h1 span { color: #3468e6; }
.hero-lead { max-width: 590px; margin: 0; color: #596987; font-size: 1.08rem; line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: center; gap: 19px; padding: 0 24px; border-radius: 13px; text-decoration: none; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: #3368e8; box-shadow: 0 13px 28px rgba(44, 96, 219, .23); }
.button-primary:hover { background: #2458d6; box-shadow: 0 17px 30px rgba(44, 96, 219, .28); }
.button-secondary { color: #34517e; border: 1px solid #dae3f3; background: #fff; }
.button-secondary:hover { background: #f0f5ff; }
.hero-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 29px; color: #71809b; font-size: .82rem; }
.hero-tags span { padding: 0 11px; border-right: 1px solid #cdd7e8; }
.hero-tags span:first-child { padding-left: 0; }
.hero-tags span:last-child { border-right: 0; }

.hero-visual { position: relative; min-height: 510px; display: flex; align-items: center; justify-content: center; isolation: isolate; }
.hero-visual::before { content: ""; position: absolute; z-index: -2; inset: 7% 1% 6% 6%; border-radius: 43% 57% 54% 46% / 52% 43% 57% 48%; background: linear-gradient(145deg, #e5eeff, #d9e7ff); transform: rotate(-8deg); }
.orbit { position: absolute; z-index: -1; border: 1px solid rgba(61, 110, 216, .19); border-radius: 50%; }
.orbit-one { width: 390px; height: 390px; transform: rotate(-17deg) scaleX(1.24); }
.orbit-two { width: 500px; height: 340px; transform: rotate(27deg); }
.preview-card { width: min(100% - 44px, 400px); padding: 21px; border: 1px solid #e1e9f8; border-radius: 27px; background: #fff; box-shadow: 0 28px 65px rgba(39, 73, 142, .17); transform: rotate(3deg); }
.preview-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.preview-brand { display: inline-flex; align-items: center; gap: 8px; font-size: 1.05rem; }
.preview-brand img { border-radius: 8px; }
.preview-caption { color: #a4b0c5; font-size: .68rem; }
.preview-greeting { display: grid; gap: 5px; padding: 31px 9px 22px; }
.preview-greeting span { color: #8190aa; font-size: .82rem; }
.preview-greeting strong { font-size: 1.32rem; letter-spacing: -.02em; }
.preview-feature { display: flex; align-items: center; gap: 11px; min-width: 0; }
.preview-feature-primary { padding: 18px 15px; border-radius: 17px; background: #ecf3ff; }
.preview-feature-primary div { display: grid; gap: 4px; }
.preview-feature strong { font-size: .94rem; }
.preview-feature small { color: #7889a6; font-size: .7rem; }
.preview-arrow { margin-left: auto; color: #5278d0; font-size: 1.3rem; }
.feature-icon { width: 38px; height: 38px; flex: 0 0 38px; display: grid; place-items: center; border-radius: 11px; font-size: 1.2rem; font-weight: 750; }
.feature-icon.blue { color: #fff; background: #3873ed; }
.feature-icon.mint { color: #198d7f; background: #d9f8ef; }
.feature-icon.peach { color: #d27b33; background: #fff0d9; }
.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-top: 11px; }
.preview-grid .preview-feature { display: grid; grid-template-columns: 38px 1fr; column-gap: 9px; row-gap: 3px; padding: 14px 11px; border: 1px solid #ecf0f7; border-radius: 16px; }
.preview-grid .feature-icon { grid-row: span 2; }
.preview-grid small { grid-column: 2; }
.preview-foot { display: flex; align-items: center; gap: 8px; margin: 20px 2px 4px; color: #9aa8bd; font-size: .69rem; }
.mini-line { width: 16px; height: 2px; background: #b6c5e3; }
.float-note { position: absolute; right: 0; bottom: 48px; padding: 12px 16px; border: 1px solid #dfebff; border-radius: 13px; color: #3156a1; background: #fff; box-shadow: 0 12px 30px rgba(30, 68, 145, .11); font-size: .77rem; font-weight: 700; transform: rotate(-5deg); }
.float-note span { color: #f3a447; margin-right: 3px; }

.features { padding: 70px 0 104px; border-top: 1px solid #e5ebf6; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 60px; margin-bottom: 30px; }
.section-kicker { color: #3569dd; font-size: .79rem; font-weight: 850; letter-spacing: .15em; }
h2 { font-size: clamp(2.1rem, 3.8vw, 3.35rem); line-height: 1.26; letter-spacing: -.04em; }
.section-heading h2 { margin: 14px 0 0; }
.section-heading p { max-width: 430px; margin: 0 2px 5px 0; color: #60718f; line-height: 1.85; }
.feature-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.feature-card { grid-column: span 2; min-height: 244px; display: flex; flex-direction: column; align-items: flex-start; padding: 24px; border: 1px solid #e4ebf6; border-radius: 20px; background: #fff; box-shadow: 0 10px 30px rgba(20, 49, 108, .035); transition: transform .2s ease, box-shadow .2s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 18px 34px rgba(20, 49, 108, .08); }
.feature-card:nth-child(4), .feature-card:nth-child(5) { grid-column: span 3; min-height: 220px; }
.card-number { color: #9caac2; font-size: .68rem; font-weight: 800; letter-spacing: .1em; }
.card-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-top: 21px; border-radius: 12px; font-size: 1.35rem; font-weight: 800; }
.icon-blue { color: #3769dc; background: #e8f0ff; }
.icon-green { color: #15926d; background: #e0f7ed; }
.icon-purple { color: #7760d3; background: #f0ebff; }
.icon-orange { color: #cf8134; background: #fff0da; }
.icon-cyan { color: #168aab; background: #e3f6fb; }
.feature-card h3 { margin: 17px 0 8px; font-size: 1.17rem; letter-spacing: -.02em; }
.feature-card p { margin: 0; color: #667691; font-size: .9rem; line-height: 1.75; }

.download-panel { position: relative; overflow: hidden; display: flex; align-items: center; justify-content: space-between; gap: 40px; min-height: 286px; padding: 42px 51px; border-radius: 26px; color: #fff; background: linear-gradient(116deg, #163577, #275bc8 68%, #3679ef); }
.download-glow { position: absolute; right: 14%; bottom: -200px; width: 400px; height: 400px; border-radius: 50%; background: rgba(167, 204, 255, .15); filter: blur(3px); pointer-events: none; }
.download-copy, .download-actions { position: relative; }
.download-panel .section-kicker { color: #b9d3ff; }
.download-panel h2 { margin: 14px 0 11px; font-size: clamp(1.9rem, 3vw, 2.6rem); }
.download-panel p { margin: 0; color: #e0ebff; line-height: 1.75; }
.download-panel .download-hint { margin-top: 17px; color: #b8cef5; font-size: .84rem; }
.download-actions { display: grid; justify-items: center; gap: 13px; flex: 0 0 241px; }
.download-button { min-height: 58px; width: 100%; display: inline-flex; align-items: center; justify-content: center; border-radius: 13px; color: #2455be; background: #fff; text-decoration: none; text-align: center; font-weight: 850; box-shadow: 0 12px 25px rgba(12, 36, 91, .13); transition: transform .2s ease, background .2s ease; }
.download-button:not(.is-disabled):hover { transform: translateY(-2px); background: #edf4ff; }
.download-button.is-disabled { color: #5e7195; background: #d9e6ff; cursor: default; }
.version-label { color: #d4e3ff; font-size: .8rem; text-align: center; }
.site-footer { min-height: 122px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: #8492aa; font-size: .83rem; }
.site-footer div { display: flex; align-items: center; gap: 17px; }
.footer-brand { color: #1e3155; font-weight: 850; font-size: 1.04rem; }
.site-footer a { color: #647596; text-decoration: none; font-weight: 700; }

@media (max-width: 900px) {
  .site-shell { width: min(100% - 44px, 1190px); }
  .hero { grid-template-columns: 1fr; gap: 10px; padding: 43px 0 76px; }
  .hero-visual { min-height: 500px; }
  .section-heading { align-items: start; }
  .feature-card { grid-column: span 3; }
  .feature-card:nth-child(4), .feature-card:nth-child(5) { grid-column: span 3; }
}

@media (max-width: 600px) {
  .site-shell { width: min(100% - 36px, 1190px); }
  .site-header { min-height: 72px; gap: 12px; }
  .brand { font-size: 1.18rem; }
  .brand img { width: 34px; height: 34px; }
  .site-header nav { gap: 15px; }
  .site-header nav a { font-size: .78rem; }
  .header-action { display: none; }
  .hero { padding: 38px 0 63px; }
  h1 { margin: 20px 0; font-size: clamp(2.62rem, 10.1vw, 4rem); }
  .hero-lead { font-size: .98rem; line-height: 1.8; }
  .hero-actions { margin-top: 26px; }
  .button { width: 100%; justify-content: space-between; }
  .hero-tags { margin-top: 21px; font-size: .7rem; }
  .hero-tags span { padding: 0 7px; }
  .hero-visual { min-height: 425px; }
  .orbit-one { width: 300px; height: 300px; }
  .orbit-two { width: 350px; height: 260px; }
  .preview-card { width: min(100% - 18px, 380px); padding: 17px; transform: rotate(1deg); }
  .float-note { right: 2px; bottom: 12px; }
  .features { padding: 58px 0 72px; }
  .section-heading { display: block; margin-bottom: 24px; }
  .section-heading p { margin-top: 16px; font-size: .92rem; }
  .feature-grid { grid-template-columns: 1fr; gap: 12px; }
  .feature-card, .feature-card:nth-child(4), .feature-card:nth-child(5) { grid-column: 1; min-height: 0; padding: 22px; }
  .card-icon { margin-top: 17px; }
  .download-panel { min-height: 0; flex-direction: column; align-items: stretch; gap: 26px; padding: 31px 24px; border-radius: 22px; }
  .download-actions { flex-basis: auto; justify-items: stretch; }
  .site-footer { min-height: 115px; }
  .site-footer div { display: grid; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}