:root {
  --ink: #111827;
  --muted: #566176;
  --line: #dbe3ef;
  --blue: #1769ff;
  --blue-dark: #0d4fc4;
  --green: #16835d;
  --surface: #ffffff;
  --soft: #f4f7fb;
  --dark: #0b1628;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--surface); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid rgba(219, 227, 239, .9); background: rgba(255,255,255,.94); backdrop-filter: blur(18px); }
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.site-brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 7px; color: #fff; background: var(--dark); font-size: 19px; font-weight: 800; }
.site-brand strong, .site-brand small { display: block; line-height: 1.2; }
.site-brand strong { font-size: 18px; }
.site-brand small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a { padding: 9px 12px; border-radius: 6px; color: #465268; font-size: 14px; font-weight: 700; }
.site-nav a:hover { color: var(--blue); background: #edf4ff; }
.site-nav .nav-download { margin-left: 8px; color: #fff; background: var(--blue); }
.site-nav .nav-download:hover { color: #fff; background: var(--blue-dark); }
.nav-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-size: 20px; }

.software-carousel { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #f7faff 0%, #f2f6fb 100%); }
.carousel-slide { display: none; padding: 52px 0 46px; }
.carousel-slide.is-active { display: block; animation: slide-in .32s ease; }
@keyframes slide-in { from { opacity: .25; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } }
.carousel-grid { display: grid; grid-template-columns: .76fr 1.24fr; align-items: center; gap: 58px; }
.carousel-product { display: flex; align-items: center; gap: 12px; margin: 18px 0 15px; color: var(--muted); font-size: 13px; font-weight: 700; }
.carousel-product img { width: 48px; height: 48px; border-radius: 8px; }
.carousel-copy h1 { margin: 0; font-size: 46px; line-height: 1.18; }
.carousel-copy > p { max-width: 560px; margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.carousel-copy .button-primary { min-width: 250px; }
.carousel-copy .button-secondary { padding-inline: 16px; }
.carousel-visual { overflow: hidden; border: 1px solid #c6d3e3; border-radius: 8px; background: #fff; box-shadow: 0 26px 64px rgba(20, 43, 76, .17); }
.carousel-controls { display: flex; align-items: center; justify-content: space-between; padding-top: 18px; padding-bottom: 18px; }
.carousel-controls.is-single { display: none; }
.carousel-dots { display: flex; gap: 8px; }
.carousel-dots button { width: 22px; height: 4px; padding: 0; border: 0; background: #cbd5e1; }
.carousel-dots button.is-active { width: 44px; background: var(--blue); }
.carousel-arrows { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12px; }
.carousel-arrows button { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 5px; color: var(--ink); background: #fff; font-size: 24px; line-height: 1; }

.product-browser { padding: 64px 0 82px; background: #fff; }
.browser-heading { display: grid; grid-template-columns: minmax(0, 1fr) 390px; align-items: end; gap: 48px; margin-bottom: 28px; }
.browser-heading span, .detail-header span { color: var(--blue); font-size: 13px; font-weight: 800; }
.browser-heading h2 { margin: 5px 0 0; font-size: 32px; }
.browser-heading > p { margin: 0 0 3px; color: var(--muted); font-size: 14px; }
.browser-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); border: 1px solid #d5deea; border-radius: 8px; overflow: hidden; background: #fff; box-shadow: 0 18px 48px rgba(20, 43, 76, .08); }
.software-picker { padding: 14px; border-right: 1px solid var(--line); background: #f6f8fb; }
.software-option { width: 100%; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; min-height: 72px; padding: 12px; border: 1px solid transparent; border-radius: 6px; color: var(--ink); background: transparent; text-align: left; cursor: pointer; }
.software-option + .software-option { margin-top: 6px; }
.software-option:hover:not(:disabled), .software-option.is-active { border-color: #a9c8ff; background: #fff; box-shadow: 0 7px 20px rgba(20, 43, 76, .09); }
.software-option img, .option-placeholder { width: 42px; height: 42px; border-radius: 7px; }
.option-placeholder { display: grid; place-items: center; color: #64748b; background: #e5eaf1; font-size: 9px; font-weight: 900; }
.software-option strong, .software-option small { display: block; }
.software-option strong { font-size: 14px; }
.software-option small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.software-option b { color: var(--blue); font-size: 20px; }
.software-option:disabled { opacity: .55; cursor: default; }
.product-detail { display: none; min-width: 0; padding: 34px; }
.product-detail.is-active { display: block; }
.detail-header { display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.detail-header h2 { margin: 4px 0 0; font-size: 29px; }
.detail-header p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.detail-header .button { min-width: 130px; }
.detail-preview { margin: 28px 0; overflow: hidden; border: 1px solid #cbd6e4; border-radius: 6px; background: var(--soft); }
.detail-preview img { width: 100%; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.detail-grid section { padding: 24px; border: 1px solid var(--line); border-radius: 7px; }
.detail-grid h3 { margin: 0 0 16px; font-size: 17px; }
.capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 11px 20px; margin: 0; padding: 0; list-style: none; color: #344054; font-size: 13px; }
.capability-list li::before { content: "✓"; margin-right: 7px; color: var(--green); font-weight: 900; }
.mini-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0; padding: 0; list-style: none; }
.mini-steps li { display: flex; align-items: center; gap: 9px; }
.mini-steps b { width: 26px; height: 26px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 4px; color: #fff; background: var(--blue); font-size: 11px; }
.mini-steps strong, .mini-steps small { display: block; }
.mini-steps strong { font-size: 12px; }
.mini-steps small { color: var(--muted); font-size: 9px; }
.detail-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.detail-footer a { color: var(--blue); font-size: 14px; font-weight: 800; }

.center-hero { padding: 78px 0 68px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #f7faff 0%, #fff 100%); }
.center-hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(400px, .75fr); align-items: center; gap: 72px; }
.hero-kicker { display: block; margin-bottom: 16px; color: var(--blue); font-size: 13px; font-weight: 800; }
.product-identity { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; color: var(--green); font-size: 13px; font-weight: 800; }
.product-identity img { width: 50px; height: 50px; border-radius: 10px; }
.hero-copy h1 { margin: 0; font-size: 44px; line-height: 1.22; letter-spacing: 0; }
.hero-lead { max-width: 580px; margin: 22px 0 0; color: var(--muted); font-size: 19px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: stretch; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 20px; border: 1px solid var(--line); border-radius: 7px; font-weight: 800; transition: transform .16s ease, box-shadow .16s ease, background .16s ease; }
.button:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(17, 24, 39, .12); }
.button-primary { min-width: 282px; justify-content: flex-start; gap: 13px; color: #fff; border-color: var(--blue); background: var(--blue); }
.button-primary:hover { color: #fff; background: var(--blue-dark); }
.button-primary span:last-child, .button-primary strong, .button-primary small { display: block; }
.button-primary small { margin-top: 2px; font-size: 11px; font-weight: 500; opacity: .82; }
.button-icon { font-size: 25px; line-height: 1; }
.button-secondary { background: #fff; }
.trust-row { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 23px; color: #344054; font-size: 13px; font-weight: 700; }
.trust-row span::before { content: "✓"; margin-right: 6px; color: var(--green); }
.center-primary { min-width: 174px; justify-content: center; }
.category-index { padding: 10px 30px 24px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 24px 70px rgba(30, 58, 95, .13); }
.index-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 0 12px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.index-head strong { color: var(--green); }
.index-row { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.index-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 6px; color: #64748b; background: #eef2f7; font-size: 10px; font-weight: 900; }
.index-row.active .index-icon { color: var(--blue); background: #eaf2ff; }
.index-row strong, .index-row small { display: block; }
.index-row small { margin-top: 2px; color: var(--muted); font-size: 11px; }
.index-row b { color: #b5c0cf; font-size: 13px; }
.category-index > p { margin: 20px 0 0; color: var(--muted); font-size: 12px; }
.hero-visual { overflow: hidden; border: 1px solid #cdd8e7; border-radius: 8px; background: #fff; box-shadow: 0 30px 80px rgba(30, 58, 95, .18); transform: rotate(.4deg); }
.window-bar { height: 38px; display: flex; align-items: center; gap: 7px; padding: 0 13px; border-bottom: 1px solid #e3e8f0; background: #f5f7fa; }
.window-bar span { width: 9px; height: 9px; border-radius: 50%; background: #ff665c; }
.window-bar span:nth-child(2) { background: #f5bd3e; }
.window-bar span:nth-child(3) { background: #34bd5a; }
.window-bar strong { margin-left: 6px; color: #6b7280; font-size: 11px; }
.hero-visual img { width: 100%; }

.quick-facts { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact-grid div { padding: 24px 28px; border-right: 1px solid var(--line); }
.fact-grid div:first-child { border-left: 1px solid var(--line); }
.fact-grid strong, .fact-grid span { display: block; }
.fact-grid strong { font-size: 20px; }
.fact-grid span { margin-top: 2px; color: var(--muted); font-size: 13px; }

.section { padding: 82px 0; }
.catalog-section { background: var(--soft); }
.catalog-heading { margin-left: 0; text-align: left; }
.catalog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.catalog-card { border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.catalog-card-featured { grid-column: 1 / -1; display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; }
.catalog-info { padding: 34px; }
.catalog-title { display: flex; align-items: center; gap: 16px; }
.catalog-title img { width: 58px; height: 58px; border-radius: 10px; }
.catalog-title span, .catalog-card-planned > span:not(.planned-index) { color: var(--green); font-size: 12px; font-weight: 800; }
.catalog-title h3 { margin: 3px 0 0; font-size: 24px; }
.catalog-info > p { margin: 22px 0 0; color: var(--muted); font-size: 14px; }
.catalog-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.catalog-tags span { padding: 4px 9px; border-radius: 4px; color: #344054; background: #eef2f7; font-size: 11px; font-weight: 700; }
.catalog-actions { display: flex; align-items: center; gap: 20px; margin-top: 26px; }
.catalog-actions .button { min-width: 126px; min-height: 44px; justify-content: center; }
.catalog-actions > a:last-child { color: var(--blue); font-size: 13px; font-weight: 800; }
.catalog-preview { display: flex; align-items: center; padding: 24px 24px 24px 0; background: #eef3f9; }
.catalog-preview img { width: 100%; border: 1px solid #cbd6e4; box-shadow: 0 12px 32px rgba(20, 43, 76, .13); }
.catalog-card-planned { position: relative; min-height: 190px; padding: 28px; overflow: hidden; }
.catalog-card-planned h3 { margin: 8px 0; font-size: 20px; }
.catalog-card-planned p { max-width: 350px; margin: 0; color: var(--muted); font-size: 14px; }
.catalog-card-planned small { display: block; margin-top: 22px; color: #7c8798; font-weight: 700; }
.planned-index { position: absolute; right: 24px; top: 15px; color: #e3e9f1; font-size: 52px; font-weight: 900; }
.product-intro { padding: 48px 0; background: #fff; }
.product-intro-grid { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
.product-intro .product-identity { margin: 0; }
.product-intro-grid > div:nth-child(2) h2 { margin: 0; font-size: 28px; }
.product-intro-grid > div:nth-child(2) p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.section-heading { max-width: 760px; margin: 0 auto 42px; text-align: center; }
.section-heading span, .section-kicker { color: var(--blue); font-size: 13px; font-weight: 800; }
.section-heading h2, .demo-copy h2 { margin: 8px 0 0; font-size: 34px; line-height: 1.3; }
.section-heading p, .demo-copy > p { margin: 14px 0 0; color: var(--muted); font-size: 16px; }
.section-heading.compact { margin-bottom: 34px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-item { min-height: 230px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 6px; color: var(--blue); background: #eaf2ff; font-size: 15px; font-weight: 900; }
.feature-item:nth-child(2n) .feature-icon { color: var(--green); background: #e9f8f2; }
.feature-item h3 { margin: 20px 0 8px; font-size: 18px; }
.feature-item p { margin: 0; color: var(--muted); font-size: 14px; }

.section-demo { background: var(--soft); }
.demo-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 58px; align-items: center; }
.demo-copy ul { margin: 24px 0 0; padding: 0; list-style: none; }
.demo-copy li { margin: 12px 0; color: #344054; }
.demo-copy li::before { content: "✓"; display: inline-grid; place-items: center; width: 20px; height: 20px; margin-right: 10px; border-radius: 50%; color: #fff; background: var(--green); font-size: 11px; font-weight: 900; }
.product-shot { margin: 0; overflow: hidden; border: 1px solid #ccd7e6; border-radius: 8px; background: #fff; box-shadow: 0 24px 60px rgba(20, 43, 76, .14); }
.product-shot img { width: 100%; }
.product-shot figcaption { padding: 10px 16px; color: #697386; font-size: 12px; text-align: center; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 17px; padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.steps > li > strong { flex: 0 0 auto; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 6px; color: #fff; background: var(--blue); }
.steps h3 { margin: 2px 0 7px; font-size: 17px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }
.download-band { padding: 56px 0; color: #fff; background: var(--dark); }
.download-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.download-inner span { color: #64d8bd; font-size: 13px; font-weight: 800; }
.download-inner h2 { margin: 6px 0 2px; font-size: 30px; }
.download-inner p { margin: 0; color: #aebbd0; }
.button-light { color: var(--dark); border-color: #fff; background: #fff; }

.site-footer { padding: 40px 0; color: #bdc6d4; background: #070e19; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px 30px; }
.footer-inner strong { color: #fff; font-size: 18px; }
.footer-inner p { margin: 4px 0 0; font-size: 12px; }
.footer-links { display: flex; gap: 18px; font-size: 13px; }
.footer-links a:hover, .site-footer a:hover { color: #fff; }
.footer-inner > p { grid-column: 1 / -1; padding-top: 18px; border-top: 1px solid #1e293b; }

@media (max-width: 980px) {
  .carousel-grid { grid-template-columns: 1fr; }
  .browser-layout { grid-template-columns: 220px minmax(0, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .center-hero-grid, .demo-grid { grid-template-columns: 1fr; }
  .center-hero-grid { gap: 38px; }
  .hero-copy { max-width: 720px; }
  .catalog-card-featured { grid-template-columns: 1fr; }
  .catalog-preview { padding: 24px; }
  .product-intro-grid { grid-template-columns: auto 1fr; }
  .product-intro-grid > .button { grid-column: 1 / -1; width: 100%; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 64px; }
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 64px; left: 14px; right: 14px; flex-direction: column; align-items: stretch; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 18px 50px rgba(15,23,42,.15); }
  .site-nav.is-open { display: flex; }
  .site-nav a { text-align: center; }
  .site-nav .nav-download { margin: 3px 0 0; }
  .center-hero { padding: 48px 0 44px; }
  .center-hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-copy h1 { font-size: 38px; }
  .hero-lead { font-size: 16px; }
  .hero-actions, .hero-actions .button { width: 100%; }
  .button-primary { min-width: 0; }
  .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .fact-grid div { padding: 18px; border-bottom: 1px solid var(--line); }
  .section { padding: 58px 0; }
  .section-heading h2, .demo-copy h2 { font-size: 28px; }
  .feature-grid, .catalog-grid { grid-template-columns: 1fr; }
  .catalog-card-featured { grid-column: auto; }
  .feature-item { min-height: 0; }
  .download-inner { align-items: flex-start; flex-direction: column; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .carousel-slide { padding-top: 42px; }
  .carousel-grid { gap: 32px; }
  .carousel-copy h1 { font-size: 36px; }
  .browser-heading { grid-template-columns: 1fr; align-items: start; gap: 10px; }
  .browser-layout { grid-template-columns: 1fr; }
  .software-picker { display: flex; gap: 8px; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .software-option { flex: 0 0 210px; }
  .software-option + .software-option { margin-top: 0; }
  .product-detail { padding: 22px; }
  .detail-header { align-items: flex-start; flex-direction: column; }
  .detail-header .button { width: 100%; }
  .capability-list { grid-template-columns: 1fr; }
  .mini-steps { grid-template-columns: 1fr; }
  .detail-footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 460px) {
  .carousel-controls { padding-top: 12px; padding-bottom: 12px; }
  .product-browser { padding: 54px 0 62px; }
  .browser-heading h2 { font-size: 26px; }
  .fact-grid { grid-template-columns: 1fr; }
  .fact-grid div { border-left: 1px solid var(--line); }
  .catalog-info { padding: 24px; }
  .catalog-preview { padding: 16px; }
  .product-intro-grid { grid-template-columns: 1fr; }
  .product-intro-grid > .button { grid-column: auto; }
}