:root {
  --ink: #102532;
  --muted: #607581;
  --navy: #073955;
  --blue: #0879b9;
  --cyan: #26b7c8;
  --warm: #fff4dd;
  --paper: #f6fafb;
  --line: #dbe7eb;
  --white: #fff;
  --shadow: 0 24px 70px rgba(4, 48, 71, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 84% 8%, rgba(38,183,200,.10), transparent 27rem),
    linear-gradient(#f7fbfc, #f4f8fa 44%, #f7fafb);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.section-shell { width: min(1200px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 max(24px, calc((100vw - 1200px) / 2));
  border-bottom: 1px solid rgba(219, 231, 235, .85);
  background: rgba(246, 250, 251, .9);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 11px; font-size: 18px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: white;
  border-radius: 10px 4px 10px 4px;
  background: linear-gradient(140deg, var(--blue), var(--cyan));
  font-size: 12px;
  letter-spacing: .08em;
}
nav { display: flex; gap: 34px; color: #415b69; font-size: 14px; font-weight: 600; }
nav a:hover { color: var(--blue); }
.nav-menu { position: relative; }
.nav-menu summary { cursor: pointer; list-style: none; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu summary::after { content: "⌄"; display: inline-block; margin-left: 6px; color: #7e929c; transform: translateY(-1px); }
.nav-dropdown { position: absolute; top: 34px; left: 50%; display: grid; width: 230px; padding: 9px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255,255,255,.98); box-shadow: 0 18px 45px rgba(7,57,85,.14); transform: translateX(-50%); }
.nav-dropdown::before { content: ""; position: absolute; top: -14px; left: 0; width: 100%; height: 14px; }
.nav-dropdown a { padding: 9px 11px; border-radius: 7px; color: #405966; font-size: 12px; white-space: nowrap; }
.nav-dropdown a:hover { color: #075f91; background: #edf7fa; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(420px, .86fr) minmax(540px, 1.14fr);
  align-items: center;
  min-height: 680px;
  gap: 58px;
  padding-block: 84px 94px;
}
.hero-copy { position: relative; z-index: 2; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .19em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 21px 0 25px; color: var(--navy); font-size: clamp(45px, 4.5vw, 62px); line-height: 1.13; letter-spacing: -.055em; }
.hero-line { display: block; white-space: nowrap; }
.hero-accent { color: var(--blue); }
.hero-kicker { display: inline-flex; align-items: center; gap: 9px; padding: 7px 12px; color: #28576c; border: 1px solid #c9e2e8; border-radius: 999px; background: rgba(255,255,255,.72); font-size: 12px; font-weight: 700; }
.hero-kicker span { width: 7px; height: 7px; border-radius: 50%; background: #20aaa9; box-shadow: 0 0 0 5px rgba(32,170,169,.12); }
.hero-text { max-width: 520px; margin-bottom: 30px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 700;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.button-disabled {
  cursor: not-allowed;
  opacity: 0.62;
  pointer-events: none;
  user-select: none;
}
.button-primary span { margin-left: 12px; font-size: 17px; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: linear-gradient(135deg, #0572ad, #089bae); box-shadow: 0 12px 30px rgba(8, 121, 185, .25); }
.button-ghost { border-color: #c7dbe3; background: rgba(255,255,255,.72); }
.release-meta { display: flex; flex-wrap: wrap; gap: 9px 22px; margin-top: 20px; color: #6e818b; font-size: 12px; }
.release-meta span::before { content: "✓"; margin-right: 6px; color: #1a9a8f; font-weight: 800; }

.hero-visual { position: relative; z-index: 1; }
.hero-visual::before { content: ""; position: absolute; inset: -90px -100px -80px -70px; z-index: -1; border-radius: 50%; background: radial-gradient(circle, rgba(18,145,180,.13), rgba(18,145,180,0) 67%); }
.product-shot { position: relative; overflow: hidden; border: 1px solid rgba(181,207,217,.92); border-radius: 17px; background: white; box-shadow: 0 32px 80px rgba(4,48,71,.18); cursor: zoom-in; transform: perspective(1400px) rotateY(-2deg); }
.product-shot-bar { display: flex; align-items: center; gap: 6px; height: 38px; padding: 0 14px; color: #69808b; border-bottom: 1px solid #e2eaed; background: #f8fafb; font-size: 10px; }
.product-shot-bar i { width: 8px; height: 8px; border-radius: 50%; background: #6dc598; }
.product-shot-bar i:first-child { background: #ed8278; }
.product-shot-bar i:nth-child(2) { background: #efc65d; }
.product-shot-bar b { margin-left: auto; margin-right: auto; transform: translateX(-18px); font-weight: 700; }
.product-shot-viewport { height: 405px; overflow: hidden; background: #f3f7f9; }
.product-shot-viewport img { display: block; width: 117%; max-width: none; height: auto; margin-left: -17%; transform: translateY(-13px); }
.hero-badge { position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px; padding: 11px 15px; border: 1px solid rgba(199,220,227,.95); border-radius: 11px; background: rgba(255,255,255,.94); box-shadow: 0 14px 35px rgba(4,48,71,.13); backdrop-filter: blur(10px); }
.hero-badge b, .hero-badge span { display: block; }
.hero-badge b { color: var(--navy); font-size: 15px; }
.hero-badge span { color: var(--muted); font-size: 10px; }
.hero-badge-top { top: -22px; right: 28px; }
.hero-badge-bottom { bottom: -24px; left: -24px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid #d7e4e9; border-radius: 16px; background: rgba(255,255,255,.86); box-shadow: 0 16px 45px rgba(9,58,81,.07); backdrop-filter: blur(10px); }
.stats div { position: relative; padding: 27px 30px; border-right: 1px solid var(--line); }
.stats div::before { content: ""; position: absolute; left: 29px; bottom: 18px; width: 32px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--blue), var(--cyan)); opacity: 0; transition: opacity .2s; }
.stats div:hover::before { opacity: 1; }
.stats div:last-child { border-right: 0; }
.stats strong, .stats span { display: block; }
.stats strong { color: var(--navy); font-size: 20px; }
.stats span { color: var(--muted); font-size: 12px; }

.product-values { display: grid; grid-template-columns: 1.35fr repeat(3, 1fr); gap: 16px; padding-top: 118px; }
.value-intro { padding-right: 35px; }
.value-intro h2 { font-size: clamp(30px, 3vw, 42px); }
.value-intro > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }
.product-values article { padding: 25px 23px; border: 1px solid #dae7eb; border-radius: 15px; background: rgba(255,255,255,.78); }
.product-values article > span { display: inline-block; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.product-values article h3 { margin: 25px 0 9px; color: var(--navy); font-size: 17px; }
.product-values article p { margin: 0; color: var(--muted); font-size: 12px; }

.features { padding-block: 128px 112px; }
.section-title { max-width: 720px; margin-bottom: 46px; }
h2 { margin-bottom: 16px; color: var(--navy); font-size: clamp(31px, 4vw, 47px); line-height: 1.2; letter-spacing: -.04em; }
.section-title > p:last-child, .section-copy > p { color: var(--muted); }
.feature-category { margin-top: 30px; padding: 34px; border: 1px solid #dae8ec; border-radius: 22px; background: rgba(255,255,255,.76); box-shadow: 0 15px 46px rgba(7,57,85,.055); }
.feature-category, .screenshots, .sparameter, .download { scroll-margin-top: 92px; }
.feature-category + .feature-category { padding-top: 34px; border-top: 1px solid #dae8ec; }
.feature-category:nth-child(odd) { background: rgba(242,250,250,.82); }
.category-heading { display: grid; grid-template-columns: 52px 1fr; align-items: start; gap: 18px; margin-bottom: 27px; }
.category-heading > span { display: grid; place-items: center; width: 45px; height: 45px; color: var(--blue); border: 1px solid #b9dbe4; border-radius: 13px; background: linear-gradient(145deg, #e9f7fa, #f8fcfd); font-size: 12px; font-weight: 800; }
.category-heading h3 { margin: 0 0 2px; color: var(--navy); font-size: 23px; }
.category-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.feature-grid { display: grid; grid-template-columns: repeat(12, 1fr); align-items: start; gap: 16px; }
.feature-card { grid-column: span 4; min-height: 230px; padding: 26px; overflow: hidden; border: 1px solid #d7e5e9; border-radius: 15px; background: rgba(255,255,255,.94); transition: border .2s, transform .2s, box-shadow .2s; }
.feature-card:hover { transform: translateY(-4px); border-color: #aed3dd; box-shadow: 0 18px 42px rgba(7,57,85,.095); }
.feature-card.featured { grid-column: span 8; color: white; border: 0; background: linear-gradient(135deg, #074667, #087e9a); }
.system-grid > .featured { grid-column: span 8; }
.system-grid > .feature-card:nth-child(2) { grid-column: span 4; }
.system-grid > .feature-card:nth-child(n+3) { grid-column: span 6; }
.four-up > .feature-card { grid-column: span 6; }
.mixed-three > .featured { grid-column: span 6; }
.mixed-three > .feature-card:not(.featured) { grid-column: span 3; }
.single-grid > .wide-card { grid-column: 1 / -1; min-height: 190px; }
.feature-card.featured h3, .feature-card.featured .card-index { color: white; }
.feature-card.featured p { max-width: 620px; color: #d8edf2; }
.card-index { color: var(--cyan); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.feature-card h3 { margin: 20px 0 10px; color: #123b50; font-size: 21px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.tag-list { display: flex; gap: 8px; margin-top: 22px; }
.tag-list span { padding: 5px 10px; border: 1px solid rgba(255,255,255,.28); border-radius: 30px; color: #ebf7f9; font-size: 10px; }
.feature-shot { position: relative; display: block; width: 100%; height: 148px; margin-top: 22px; padding: 0; overflow: hidden; border: 1px solid rgba(172,199,210,.75); border-radius: 10px; background: #edf4f6; cursor: zoom-in; }
.feature-shot img { display: block; width: 117%; max-width: none; height: auto; margin-left: -17%; transform: translateY(var(--crop-y, -20px)); transition: transform .25s ease; }
.feature-shot:hover img { transform: translateY(var(--crop-y, -20px)) scale(1.025); }
.feature-shot span { position: absolute; right: 8px; bottom: 8px; padding: 5px 9px; color: white; border-radius: 6px; background: rgba(5,48,70,.82); font: 600 10px/1.2 "Microsoft YaHei UI", sans-serif; }
.featured .feature-shot { border-color: rgba(255,255,255,.26); }

.screenshots { padding: 105px 34px 115px; border: 1px solid #dce8ec; border-radius: 25px; background: rgba(255,255,255,.72); box-shadow: 0 18px 55px rgba(7,57,85,.06); }
.shot-filters { display: flex; flex-wrap: wrap; gap: 9px; margin: -10px 0 25px; }
.shot-filter { padding: 8px 14px; color: #47616e; border: 1px solid #cadde4; border-radius: 30px; background: white; font: 600 12px/1.2 "Microsoft YaHei UI", sans-serif; cursor: pointer; }
.shot-filter:hover, .shot-filter.active { color: white; border-color: var(--blue); background: var(--blue); }
.screenshot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.screenshot-card { overflow: hidden; margin: 0; border: 1px solid #d6e4e9; border-radius: 16px; background: white; box-shadow: 0 13px 35px rgba(7,57,85,.07); cursor: zoom-in; transition: transform .2s ease, box-shadow .2s ease; }
.screenshot-card:hover { transform: translateY(-3px); box-shadow: 0 19px 45px rgba(7,57,85,.12); }
.shot-frame { display: grid; place-items: center; height: 290px; padding: 14px; overflow: hidden; border-bottom: 1px solid var(--line); background: linear-gradient(135deg, #f0f6f8, #f9fbfc); }
.shot-frame img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.shot-frame.app-shot { padding: 0; align-items: start; }
.shot-frame.app-shot img { width: 117%; max-width: none; height: auto; margin-left: -17%; object-fit: initial; transform: translateY(var(--crop-y, -25px)); }
.screenshot-card figcaption { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 17px 20px; }
.screenshot-card figcaption strong { color: var(--navy); font-size: 15px; }
.screenshot-card figcaption span { color: var(--muted); font-size: 11px; text-align: right; }
.image-viewer { width: min(95vw, 1500px); max-width: none; padding: 14px; border: 0; border-radius: 14px; background: white; box-shadow: 0 30px 90px rgba(0,0,0,.35); }
.image-viewer::backdrop { background: rgba(5,24,35,.78); backdrop-filter: blur(4px); }
.image-viewer img { display: block; width: 100%; max-height: 86vh; object-fit: contain; }
.viewer-close { position: absolute; z-index: 2; top: 20px; right: 20px; display: grid; place-items: center; width: 38px; height: 38px; padding: 0; color: white; border: 0; border-radius: 50%; background: rgba(4,35,51,.78); font-size: 25px; line-height: 1; cursor: pointer; }

.sparameter { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 80px; padding-block: 125px; }
.matrix-card { overflow: hidden; border: 1px solid #cbdae0; border-radius: 10px; background: white; box-shadow: 0 20px 50px rgba(9, 58, 81, .11); transform: rotate(-1deg); }
.matrix-head, .matrix-row { display: grid; grid-template-columns: 1.18fr repeat(5, 1fr); text-align: center; font-size: 12px; }
.matrix-head { color: #654b32; background: #f7e9d9; font-weight: 700; }
.matrix-head strong { grid-column: 2 / -1; }
.matrix-head span, .matrix-head strong, .matrix-row span, .matrix-row b { padding: 10px 6px; border-right: 1px solid #d4e0e4; border-bottom: 1px solid #d4e0e4; }
.matrix-row.labels { color: #345567; background: #edf7f8; font-weight: 700; }
.matrix-row b { font-weight: 700; background: white; }
.heat-one span { background: #ffe194; }
.heat-one span:nth-child(3) { background: #ffbd8e; }
.heat-two span { background: #78ca91; }
.heat-three span { background: #ffc482; }
.heat-three span:nth-child(3) { background: #ff8f80; }
.section-copy ul { margin: 25px 0 0; padding: 0; list-style: none; }
.section-copy li { margin: 10px 0; color: #34515f; }
.section-copy li::before { content: "→"; margin-right: 10px; color: var(--blue); font-weight: 800; }

.download { display: flex; align-items: center; justify-content: space-between; gap: 60px; margin-bottom: 90px; padding: 52px 58px; color: white; border-radius: 16px; background: linear-gradient(130deg, #083b58, #087e95); box-shadow: 0 22px 54px rgba(5, 58, 82, .2); }
.download h2 { color: white; font-size: clamp(28px, 4vw, 41px); }
.download p { margin-bottom: 0; color: #d9edf2; }
.download .eyebrow { color: #6ae0e0; }
.button-light { flex: 0 0 auto; flex-direction: column; min-width: 190px; min-height: 62px; color: var(--navy); background: white; }
.button-light span { color: #78909a; font-size: 10px; font-weight: 500; }
.hash { display: flex; align-items: flex-start; gap: 10px; margin-top: 16px !important; font-size: 10px; }
.hash span { flex: 0 0 auto; color: #73d9df; font-weight: 800; }
.hash code { max-width: 510px; overflow-wrap: anywhere; color: #a9cbd4; font-size: 9px; }

footer { padding: 64px 0 25px; color: #a7bdc6; background: #082e43; }
.footer-main { display: grid; grid-template-columns: 1.7fr .65fr 1fr; gap: 70px; padding-bottom: 45px; }
.footer-brand .brand { width: fit-content; color: white; }
.footer-brand p { max-width: 430px; margin: 20px 0 0; color: #94b0bb; font-size: 13px; }
.footer-links { display: grid; align-content: start; gap: 10px; font-size: 12px; }
.footer-links strong { margin-bottom: 6px; color: white; font-size: 13px; }
.footer-links a:hover { color: white; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 22px; border-top: 1px solid rgba(183,211,221,.15); }
.footer-bottom small { font-size: 10px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 60px; }
  .hero-copy { text-align: center; }
  .hero-text { margin-inline: auto; }
  .hero-actions, .release-meta { justify-content: center; }
  .hero-visual { max-width: 680px; margin: 0 auto; }
  .product-shot-viewport { height: 380px; }
  .product-values { grid-template-columns: repeat(3, 1fr); }
  .value-intro { grid-column: 1 / -1; max-width: 650px; padding: 0 0 15px; }
  .feature-card, .feature-card.featured, .system-grid > .featured, .system-grid > .feature-card:not(.featured), .four-up > .feature-card, .mixed-three > .featured, .mixed-three > .feature-card:not(.featured) { grid-column: span 6; }
  .sparameter { grid-template-columns: 1fr; gap: 55px; }
  .matrix-card { max-width: 680px; }
  .download { align-items: flex-start; flex-direction: column; }
  .footer-main { grid-template-columns: 1.4fr .7fr 1fr; gap: 35px; }
}

@media (max-width: 640px) {
  .section-shell { width: min(100% - 26px, 1160px); }
  .site-header { height: 62px; padding-inline: 15px; }
  nav { gap: 14px; font-size: 12px; }
  nav > a:first-child, nav > a:nth-last-child(2) { display: none; }
  .nav-dropdown { left: auto; right: -55px; transform: none; }
  .hero { gap: 45px; padding-block: 48px 62px; }
  h1 { font-size: 40px; }
  .hero-line { white-space: normal; }
  .hero-kicker { font-size: 11px; }
  .product-shot-viewport { height: 260px; }
  .hero-badge { display: none; }
  .window-body { grid-template-columns: 88px 1fr; min-height: 340px; }
  .mock-content { padding: 11px; }
  .mock-chart { height: 150px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div { padding: 19px; border-bottom: 1px solid var(--line); }
  .stats div:nth-child(2) { border-right: 0; }
  .product-values { grid-template-columns: 1fr; padding-top: 85px; }
  .value-intro { grid-column: auto; }
  .features { padding-block: 90px; }
  .feature-card, .feature-card.featured, .system-grid > .featured, .system-grid > .feature-card:not(.featured), .four-up > .feature-card, .mixed-three > .featured, .mixed-three > .feature-card:not(.featured) { grid-column: 1 / -1; }
  .feature-category { margin-top: 25px; padding: 24px 18px; }
  .feature-category + .feature-category { padding-top: 24px; }
  .screenshots { padding: 80px 18px 90px; }
  .screenshot-grid { grid-template-columns: 1fr; }
  .shot-frame { height: 245px; }
  .screenshot-card figcaption { align-items: flex-start; flex-direction: column; gap: 2px; }
  .screenshot-card figcaption span { text-align: left; }
  .sparameter { padding-bottom: 90px; }
  .matrix-head, .matrix-row { font-size: 9px; }
  .matrix-head span, .matrix-head strong, .matrix-row span, .matrix-row b { padding: 8px 2px; }
  .download { margin-bottom: 55px; padding: 34px 25px; }
  .button-light { width: 100%; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .feature-card { transition: none; }
}