:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --page: #f5f5f7;
  --surface: #fff;
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --radius: 30px;
  --shadow: 0 20px 60px rgba(0, 0, 0, .08);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; background: var(--page); }
body { margin: 0; color: var(--ink); background: var(--page); font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
button:focus-visible, a:focus-visible { outline: 3px solid rgba(0, 113, 227, .32); outline-offset: 3px; }
h1, h2, h3, p { margin: 0; }

.section-shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 50; width: 100%; height: 80px; color: rgba(255,255,255,.82); background: rgba(22,22,23,.97); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); }
.nav-wrap { width: 100%; height: 80px; margin: 0; padding: 0 clamp(28px, 4vw, 72px); display: grid; grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr); align-items: center; }
.brand { padding: 0; border: 0; justify-self: start; color: #f5f5f7; background: transparent; font-size: 20px; font-weight: 650; }
.brand span { margin-right: 10px; font-size: 27px; vertical-align: -1px; }
.nav-links { display: flex; align-items: stretch; height: 100%; }
.nav-links button { padding: 0 30px; border: 0; display: flex; align-items: center; color: inherit; background: transparent; font-size: 16px; font-weight: 500; transition: color .2s; }
.nav-links button:hover { color: #fff; }
.nav-account { width: max-content; justify-self: end; display: flex; align-items: center; justify-content: flex-end; gap: 12px; }
.nav-action { min-width: 82px; min-height: 44px; padding: 0 22px; border-radius: 999px; font-size: 15px; font-weight: 600; }
.nav-login-action { border: 1px solid rgba(255,255,255,.42); color: #fff; background: transparent; }
.nav-login-action:hover { border-color: rgba(255,255,255,.75); background: rgba(255,255,255,.08); }
.nav-register-action { border: 1px solid var(--blue); color: #fff; background: var(--blue); }
.nav-register-action:hover { border-color: var(--blue-hover); background: var(--blue-hover); }
.nav-user { display: flex; align-items: center; gap: 14px; font-size: 15px; }
.nav-user > span { max-width: 120px; overflow: hidden; color: #fff; text-overflow: ellipsis; white-space: nowrap; }
.nav-user button { min-height: 40px; padding: 0 17px; border: 1px solid rgba(255,255,255,.32); border-radius: 999px; color: rgba(255,255,255,.82); background: transparent; font-size: 14px; }

.hero { min-height: 710px; padding: 92px 0 72px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 48px; }
.eyebrow { color: var(--blue); font-size: 12px; font-weight: 600; letter-spacing: 1.5px; }
.hero h1 { margin: 20px 0 28px; font-size: clamp(52px, 6vw, 82px); line-height: 1.04; letter-spacing: -.055em; }
.hero h1 span { color: #6e6e73; }
.hero-description { max-width: 590px; color: var(--muted); font-size: 19px; line-height: 1.65; }
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 28px; }
.button { min-height: 48px; padding: 0 24px; border: 0; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; font-weight: 600; transition: transform .2s, background .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 10px 26px rgba(0,113,227,.2); }
.button-primary:hover { background: var(--blue-hover); }
.text-link { padding: 0; border: 0; color: #0066cc; background: transparent; font-size: 17px; }
.text-link span { margin-left: 5px; font-size: 24px; vertical-align: -1px; }
.hero-visual { position: relative; width: min(470px, 100%); aspect-ratio: 1; justify-self: end; border-radius: 50%; background: radial-gradient(circle at 48% 45%, #79a9ff 0, #225ecb 18%, #17265e 42%, #05060c 70%); box-shadow: 0 35px 90px rgba(22,51,126,.28); }
.hero-visual::after { content: ''; position: absolute; inset: 16%; border-radius: 50%; background: rgba(255,255,255,.04); box-shadow: inset 0 0 60px rgba(255,255,255,.08); }
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; }
.orbit-one { inset: 7%; }
.orbit-two { inset: 24%; border-style: dashed; transform: rotate(20deg); }
.hero-star { position: absolute; inset: 0; z-index: 2; display: grid; place-items: center; color: #fff; font-size: 148px; text-shadow: 0 0 65px rgba(255,255,255,.8); }
.glyph { position: absolute; z-index: 3; color: rgba(255,255,255,.8); font-family: "Segoe UI Symbol", serif; font-size: 32px; }
.glyph-one { top: 12%; left: 17%; }.glyph-two { top: 48%; right: 4%; }.glyph-three { bottom: 8%; left: 30%; }

.downloads { padding: 112px 0 118px; scroll-margin-top: 80px; }
.section-heading { max-width: 760px; margin-bottom: 46px; }
.section-heading h2 { margin: 14px 0 16px; font-size: clamp(40px, 5vw, 62px); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p:last-child { color: var(--muted); font-size: 18px; line-height: 1.6; }
.section-heading.centered { margin-right: auto; margin-left: auto; text-align: center; }
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.download-card { min-height: 510px; padding: 38px; border-radius: var(--radius); display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; box-shadow: var(--shadow); }
.dark-card { color: #f5f5f7; background: radial-gradient(circle at 82% 12%, rgba(56,119,255,.45), transparent 31%), linear-gradient(135deg,#02040a,#101939); }
.blue-card { color: #fff; background: radial-gradient(circle at 87% 16%, rgba(255,255,255,.25), transparent 32%), linear-gradient(135deg,#0067d7,#5129b8); }
.card-topline { display: flex; align-items: center; justify-content: space-between; }
.product-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; background: rgba(255,255,255,.14); font-size: 28px; }
.tag { padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,.13); font-size: 11px; }
.download-card h3 { margin-bottom: 15px; font-size: 38px; letter-spacing: -.035em; }
.download-card p { color: rgba(255,255,255,.66); font-size: 16px; line-height: 1.7; }
.package-meta { margin: 0; padding: 21px 0; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); }
.package-meta div { padding-left: 18px; border-left: 1px solid rgba(255,255,255,.15); }
.package-meta div:first-child { padding-left: 0; border: 0; }
.package-meta dt { color: rgba(255,255,255,.5); font-size: 10px; }
.package-meta dd { margin: 7px 0 0; font-size: 14px; font-weight: 600; }
.button-light { width: 100%; color: #1d1d1f; background: #fff; }
.button-light:hover { box-shadow: 0 10px 30px rgba(0,0,0,.17); }
.download-button:disabled { cursor: wait; opacity: .72; transform: none; }
.download-note { margin-top: 22px; color: #86868b; text-align: center; font-size: 12px; }

.membership { padding: 112px 0 126px; scroll-margin-top: 80px; }
.plan-grid { max-width: 820px; margin: 0 auto; display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.plan-card { position: relative; min-height: 320px; padding: 34px; border: 1px solid var(--line); border-radius: 26px; color: var(--ink); background: #fff; display: flex; align-items: flex-start; flex-direction: column; text-align: left; transition: transform .2s, border-color .2s, box-shadow .2s; }
.plan-card:hover { transform: translateY(-3px); }
.plan-card.selected { border-color: var(--blue); box-shadow: 0 18px 46px rgba(0,113,227,.15), inset 0 0 0 1px var(--blue); }
.selection-mark { position: absolute; top: 28px; right: 28px; width: 22px; height: 22px; border: 2px solid #b7b7bc; border-radius: 50%; }
.selected .selection-mark { border: 6px solid var(--blue); }
.recommended { position: absolute; top: -13px; left: 30px; padding: 6px 14px; border-radius: 999px; color: #fff; background: var(--blue); font-size: 11px; }
.plan-kicker { color: var(--blue); font-size: 12px; font-weight: 600; }
.plan-card > strong { margin-top: 26px; font-size: 28px; }
.price { margin-top: auto; font-size: 68px; font-weight: 700; line-height: 1; letter-spacing: -.05em; }
.price small { margin-right: 5px; font-size: 24px; vertical-align: 25px; }
.price-note { margin-top: 11px; color: var(--muted); font-size: 13px; }
.purchase-bar { max-width: 980px; margin: 34px auto 0; padding: 22px 24px 22px 30px; border-radius: 24px; background: #fff; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 36px; box-shadow: var(--shadow); }
.purchase-bar > div { display: flex; flex-direction: column; gap: 5px; }
.purchase-bar span { color: var(--muted); font-size: 11px; }
.purchase-bar strong { font-size: 17px; }
.purchase-total { text-align: right; }
.purchase-total strong { color: var(--blue); font-size: 20px; }.purchase-total b { font-size: 27px; }

footer { color: #86868b; background: #fff; }
.footer-inner { min-height: 96px; display: flex; align-items: center; justify-content: space-between; font-size: 11px; }

.modal { position: fixed; inset: 0; z-index: 100; visibility: hidden; opacity: 0; transition: opacity .2s, visibility .2s; }
.modal.open { visibility: visible; opacity: 1; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.48); backdrop-filter: blur(9px); }
.modal-card { position: absolute; top: 50%; left: 50%; width: min(440px, calc(100% - 32px)); max-height: calc(100vh - 24px); padding: 36px; overflow-y: auto; border-radius: 30px; background: #fff; text-align: center; transform: translate(-50%,-47%) scale(.98); box-shadow: 0 30px 90px rgba(0,0,0,.25); transition: transform .2s; }
.modal.open .modal-card { transform: translate(-50%,-50%) scale(1); }
.modal-close { position: absolute; top: 18px; right: 18px; width: 34px; height: 34px; border: 0; border-radius: 50%; color: #515154; background: #f0f0f2; font-size: 22px; }
.alipay-mark { width: 54px; height: 54px; margin: 0 auto 16px; border-radius: 16px; color: #fff; background: #1677ff; display: grid; place-items: center; font-size: 28px; font-weight: 700; }
.modal-card h2 { margin: 10px 0 9px; font-size: 27px; }.modal-card > p:not(.eyebrow) { color: var(--muted); }
.auth-tabs { margin-top: 24px; padding: 4px; border-radius: 14px; background: #f0f0f2; display: grid; grid-template-columns: 1fr 1fr; }
.auth-tab { height: 40px; border: 0; border-radius: 11px; color: var(--muted); background: transparent; font-size: 13px; font-weight: 600; }
.auth-tab.active { color: var(--ink); background: #fff; box-shadow: 0 2px 9px rgba(0,0,0,.09); }
.shop-login-form { margin-top: 26px; text-align: left; }
.form-intro { margin-bottom: 20px!important; text-align: center; }
.shop-login-form label { margin-bottom: 15px; display: block; }
.shop-login-form label span { margin-bottom: 7px; display: block; color: #515154; font-size: 12px; font-weight: 600; }
.shop-login-form input { width: 100%; height: 48px; padding: 0 15px; border: 1px solid #d2d2d7; border-radius: 13px; color: var(--ink); background: #f5f5f7; font: inherit; outline: none; }
.shop-login-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,113,227,.12); }
.password-hint { margin: -4px 0 4px!important; color: var(--muted); font-size: 11px; line-height: 1.5; }
.full-button { width: 100%; }
.payment-step { margin-top: 18px; }
.payment-account { color: #515154!important; font-size: 12px; }
.qr-placeholder { min-height: 250px; margin: 20px 0 14px; padding: 20px; border: 1px solid #d9e5f5; border-radius: 22px; background: #f5f9ff; display: flex; align-items: center; flex-direction: column; justify-content: center; }
.qr-loading,.payment-success { display: flex; align-items: center; flex-direction: column; justify-content: center; }
.qr-loading strong,.payment-success strong { margin: 14px 0 8px; }
.qr-loading small,.payment-success small { max-width: 280px; color: var(--muted); line-height: 1.5; }
.spinner { width: 38px; height: 38px; border: 4px solid #dbeaff; border-top-color: #1677ff; border-radius: 50%; animation: spin .8s linear infinite; }
.payment-qr { width: 230px; height: 230px; padding: 8px; object-fit: contain; border-radius: 12px; background: #fff; }
.payment-success > span { width: 62px; height: 62px; border-radius: 50%; color: #fff; background: #30a46c; display: grid; place-items: center; font-size: 34px; }
.payment-message { min-height: 20px; margin: 10px 0 15px!important; color: var(--muted); font-size: 12px; line-height: 1.6; text-align: center; }
.error-message { color: #c20f2f!important; }.success-message { color: #24734f!important; }
.button + .button { margin-top: 10px; }
.button-secondary { width: 100%; color: #1d1d1f; background: #e8e8ed; }
.site-toast { position: fixed; z-index: 130; right: 24px; bottom: 24px; max-width: min(380px, calc(100% - 48px)); padding: 13px 18px; border-radius: 14px; color: #fff; background: rgba(29,29,31,.94); box-shadow: 0 14px 40px rgba(0,0,0,.2); font-size: 13px; opacity: 0; pointer-events: none; transform: translateY(12px); transition: opacity .2s, transform .2s; }
.site-toast.show { opacity: 1; transform: none; }
.site-toast.error { background: rgba(157,20,45,.96); }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 860px) {
  .hero { min-height: auto; padding-top: 72px; grid-template-columns: 1fr; }
  .hero-visual { width: min(440px, 88vw); justify-self: center; }
  .download-grid { grid-template-columns: 1fr; }
  .purchase-bar { grid-template-columns: 1fr auto; }.purchase-bar .button { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .section-shell { width: min(100% - 30px, 1180px); }
  .site-header, .nav-wrap { height: 72px; }
  .nav-wrap { width: 100%; padding: 0 16px; grid-template-columns: minmax(0, 1fr) auto; }.nav-links { display: none; }
  .brand { font-size: 17px; }.brand span { margin-right: 6px; font-size: 22px; }
  .nav-account { gap: 7px; }.nav-action { min-width: 62px; min-height: 38px; padding: 0 13px; font-size: 13px; }
  .hero { padding: 62px 0 56px; gap: 48px; }.hero h1 { font-size: 46px; }.hero-description { font-size: 16px; }.hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-visual { width: 92%; }.hero-star { font-size: 110px; }
  .downloads, .membership { padding: 76px 0; scroll-margin-top: 72px; }.section-heading { margin-bottom: 34px; }.section-heading h2 { font-size: 39px; }.section-heading > p:last-child { font-size: 16px; }
  .download-card { min-height: 500px; padding: 28px; }.download-card h3 { font-size: 32px; }.package-meta { gap: 5px; }.package-meta div { padding-left: 10px; }
  .plan-grid { grid-template-columns: 1fr; }.plan-card { min-height: 280px; }.purchase-bar { padding: 22px; gap: 22px; }.purchase-total b { font-size: 24px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition-duration: 0s !important; } }