:root {
  --ink: #10131c;
  --muted: #626a7c;
  --line: #dfe3eb;
  --paper: #f7f8fc;
  --white: #fff;
  --blue: #315cf5;
  --blue-deep: #1e3ecf;
  --blue-soft: #e9efff;
  --green: #25a878;
  --orange: #ff8a4c;
  --radius: 24px;
  --shadow: 0 24px 70px rgba(33, 49, 99, .13);
  --container: 1200px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.72; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
.narrow { max-width: 880px; }
.article-width { max-width: 940px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -60px; left: 24px; z-index: 1000; padding: 10px 16px; color: #fff; background: var(--ink); border-radius: 8px; }
.skip-link:focus { top: 10px; }

.site-header { position: sticky; top: 0; z-index: 100; height: var(--header-height); border-bottom: 1px solid rgba(16, 19, 28, .08); background: rgba(247, 248, 252, .9); backdrop-filter: blur(18px); }
.nav-shell { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: 184px; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.brand span { display: grid; line-height: 1.18; }
.brand strong { font-size: 17px; letter-spacing: -.02em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.site-nav { display: flex; align-items: center; gap: 28px; height: 100%; }
.site-nav > a { position: relative; display: inline-flex; align-items: center; height: 100%; color: #444b5c; font-size: 14px; font-weight: 650; white-space: nowrap; }
.site-nav > a:not(.nav-download)::after { content: ""; position: absolute; left: 0; right: 0; bottom: 15px; height: 2px; background: var(--blue); transform: scaleX(0); transition: transform .2s ease; }
.site-nav > a:hover, .site-nav > a[aria-current="page"] { color: var(--ink); }
.site-nav > a[aria-current="page"]::after, .site-nav > a:hover::after { transform: scaleX(1); }
.site-nav .nav-download { height: 42px; padding: 0 18px; color: #fff; background: var(--ink); border-radius: 99px; }
.menu-button { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; }
.menu-button span { display: block; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 2px; }

.hero { position: relative; overflow: hidden; padding: 88px 0 94px; background: radial-gradient(circle at 75% 18%, #e6ecff 0, rgba(230, 236, 255, 0) 33%), linear-gradient(180deg, #fbfcff, var(--paper)); }
.hero::before { content: ""; position: absolute; width: 500px; height: 500px; left: -340px; bottom: -300px; border: 1px solid #ccd6ff; border-radius: 50%; box-shadow: 0 0 0 70px rgba(49, 92, 245, .03), 0 0 0 140px rgba(49, 92, 245, .02); }
.hero-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 72px; align-items: center; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow span { width: 30px; height: 2px; background: currentColor; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 22px; color: #7a8293; font-size: 12px; font-weight: 650; }
.breadcrumb a { color: #59647a; }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb i { color: #adb4c2; font-style: normal; }
.breadcrumb span[aria-current="page"] { max-width: min(560px, 72vw); overflow: hidden; color: #7a8293; text-overflow: ellipsis; white-space: nowrap; }
.hero h1, .sub-hero h1, .article-hero h1, .not-found h1 { margin: 0; font-size: clamp(44px, 5.7vw, 76px); line-height: 1.08; letter-spacing: -.055em; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lede { max-width: 600px; margin: 28px 0 0; color: #50586a; font-size: 19px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; min-height: 50px; padding: 0 24px; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 14px; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(49, 92, 245, .24); }
.button-primary:hover { background: var(--blue-deep); }
.button-secondary { border-color: var(--line); background: rgba(255, 255, 255, .74); }
.button-light { color: var(--ink); background: #fff; }
.platform-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.platform-row a { display: inline-flex; align-items: center; gap: 5px; padding: 6px 10px; color: #5d6575; background: #fff; border: 1px solid var(--line); border-radius: 99px; font-size: 11px; font-weight: 700; transition: color .2s ease, transform .2s ease; }
.platform-row a:hover { color: var(--blue); transform: translateY(-2px); }
.platform-row svg { width: 13px; height: 13px; }

.hero-visual { min-width: 0; }
.hero-product-showcase { position: relative; width: min(100%, 650px); height: 450px; margin: 0 auto; }
.showcase-desktop { position: absolute; left: 0; top: 28px; z-index: 2; width: 535px; filter: drop-shadow(0 26px 38px rgba(35, 54, 118, .17)); }
.showcase-toolbar { height: 35px; display: flex; align-items: center; gap: 6px; padding: 0 13px; color: #777d8d; background: #f7f8fc; border: 6px solid #252a3d; border-bottom: 0; border-radius: 16px 16px 0 0; font-size: 10px; }
.showcase-toolbar > i { width: 7px; height: 7px; border-radius: 50%; background: #d4d7e2; }
.showcase-toolbar > i:first-child { background: #ff716d; }
.showcase-toolbar > i:nth-child(2) { background: #ffc45b; }
.showcase-toolbar > i:nth-child(3) { background: #62d68d; }
.showcase-toolbar > span { margin-left: 5px; }
.showcase-toolbar > b { display: flex; align-items: center; gap: 5px; margin-left: auto; color: #f05252; font-size: 10px; }
.showcase-toolbar > b em { width: 6px; height: 6px; background: currentColor; border-radius: 50%; box-shadow: 0 0 0 3px rgba(240, 82, 82, .12); }
.showcase-stage { position: relative; height: 300px; overflow: hidden; background: linear-gradient(145deg, #dce7ff, #f1e9ff); border: 6px solid #252a3d; border-top: 0; border-radius: 0 0 8px 8px; }
.showcase-stream { position: absolute; inset: 0; background: radial-gradient(circle at 24% 25%, rgba(255,255,255,.96) 0 8%, transparent 8.3%), linear-gradient(135deg, #d9e8ff 0%, #f4e8ff 100%); }
.showcase-stream > span { position: absolute; right: 27px; width: 123px; background: rgba(255,255,255,.72); border-radius: 9px; box-shadow: 0 8px 20px rgba(85,90,125,.1); }
.showcase-stream > span:nth-of-type(1) { top: 30px; height: 72px; }
.showcase-stream > span:nth-of-type(2) { top: 114px; height: 44px; }
.showcase-person { position: absolute; left: 79px; bottom: 0; width: 165px; height: 235px; }
.showcase-person i { position: absolute; left: 48px; top: 8px; width: 68px; height: 82px; background: linear-gradient(160deg, #f4c6a8, #d99675); border-radius: 48% 48% 42% 42%; box-shadow: inset 0 13px 0 #39384a; }
.showcase-person b { position: absolute; left: 18px; bottom: -32px; width: 130px; height: 174px; background: linear-gradient(140deg, #496cf3, #7559e9); border-radius: 62px 62px 12px 12px; }
.showcase-prompter { position: absolute; left: 24px; right: 24px; top: 70px; padding: 13px 18px 16px; color: #fff; background: rgba(18,25,47,.78); border: 1px solid rgba(134,169,255,.7); border-radius: 12px; box-shadow: 0 15px 35px rgba(20,28,59,.24); backdrop-filter: blur(7px); }
.showcase-prompter > div { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; padding-bottom: 9px; color: rgba(255,255,255,.76); border-bottom: 1px solid rgba(255,255,255,.12); font-size: 10px; }
.showcase-prompter > div b { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 17px; margin-right: 4px; color: #fff; background: var(--blue); border-radius: 5px; }
.showcase-prompter > div em { color: #83edbe; font-style: normal; }
.showcase-prompter p { position: relative; margin: 0; padding: 3px 8px; color: rgba(255,255,255,.49); font-size: 12px; line-height: 1.55; }
.showcase-prompter p.is-active { color: #fff; background: rgba(79,110,247,.45); border-radius: 5px; font-size: 14px; font-weight: 700; }
.showcase-prompter p.is-active i { position: absolute; left: 8px; bottom: 3px; width: 54%; height: 2px; background: #86a6ff; border-radius: 2px; }
.showcase-base { width: 158px; height: 54px; margin: 0 auto; background: linear-gradient(#b8bfcd, #e6e9f0); border-bottom: 10px solid #252a3d; clip-path: polygon(38% 0,62% 0,69% 82%,100% 82%,100% 100%,0 100%,0 82%,31% 82%); }
.showcase-phone { position: absolute; right: -2px; bottom: 3px; z-index: 4; width: 164px; height: 334px; padding: 5px; overflow: hidden; background: #0b0c10; border: 2px solid #0b0c10; border-radius: 34px; box-shadow: 0 28px 48px rgba(30,40,80,.24), inset 0 0 0 1px rgba(255,255,255,.18); }
.showcase-island { position: absolute; top: 10px; left: 50%; z-index: 3; width: 48px; height: 13px; background: #0b0c10; border-radius: 99px; transform: translateX(-50%); }
.showcase-phone-screen { position: relative; width: 100%; height: 100%; padding: 26px 10px 12px; overflow: hidden; color: #22263a; background: radial-gradient(circle at 82% 8%, rgba(102,86,238,.2), transparent 27%), linear-gradient(180deg,#f3f6ff 0%,#fff 58%,#f2f5ff 100%); border-radius: 28px; }
.showcase-brand { display: flex; align-items: center; gap: 7px; padding: 2px 3px 9px; }
.showcase-brand img { width: 29px; height: 29px; border-radius: 8px; box-shadow: 0 5px 12px rgba(34,83,210,.18); }
.showcase-brand div { display: flex; flex-direction: column; }
.showcase-brand strong { font-size: 10px; line-height: 1.35; }
.showcase-brand small { color: #747d96; font-size: 7px; line-height: 1.35; }
.showcase-sync { display: flex; flex-direction: column; align-items: center; padding: 12px 7px 10px; background: linear-gradient(145deg,rgba(255,255,255,.96),rgba(235,240,255,.95)); border: 1px solid rgba(79,110,247,.14); border-radius: 14px; box-shadow: 0 9px 20px rgba(50,70,140,.09); }
.showcase-sync span { display: grid; place-items: center; width: 31px; height: 31px; margin-bottom: 6px; color: #fff; background: linear-gradient(135deg,#4f76f8,#7457ec); border: 4px solid #e5ebff; border-radius: 50%; font-size: 11px; font-weight: 800; }
.showcase-sync strong { color: #294bc4; font-size: 11px; line-height: 1.4; }
.showcase-sync small { color: #7c86a1; font-size: 7px; line-height: 1.5; }
.showcase-script { margin-top: 9px; padding: 10px; background: rgba(255,255,255,.96); border: 1px solid #e5e9f3; border-radius: 12px; box-shadow: 0 7px 17px rgba(43,55,100,.07); }
.showcase-script > div { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.showcase-script > div span { padding: 2px 5px; color: #4464dc; background: #eef2ff; border-radius: 4px; font-size: 6px; font-weight: 700; }
.showcase-script > div small { color: #a1a7b6; font-size: 6px; }
.showcase-script h4 { margin: 0 0 4px; font-size: 10px; }
.showcase-script p { height: 38px; margin: 0; overflow: hidden; color: #7a8298; font-size: 7px; line-height: 1.7; }
.showcase-script > i { display: block; height: 3px; margin-top: 7px; overflow: hidden; background: #edf0f7; border-radius: 99px; }
.showcase-script > i b { display: block; width: 63%; height: 100%; background: linear-gradient(90deg,#4f76f8,#7457ec); }
.showcase-ai-button { margin-top: 9px; padding: 7px; color: #fff; background: linear-gradient(135deg,#456ff5,#7356eb); border-radius: 9px; box-shadow: 0 7px 15px rgba(62,84,190,.18); text-align: center; font-size: 8px; font-weight: 700; }
.showcase-ai-button span { margin-right: 4px; }

.trust-strip { color: #fff; background: var(--ink); }
.trust-strip .container { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.trust-strip p { font-weight: 750; }
.trust-strip div div { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 22px; color: #aab1c0; font-size: 13px; }
.section { padding: 104px 0; }
.section-heading { max-width: 720px; margin-bottom: 44px; }
.section-heading-center { margin-inline: auto; text-align: center; }
.kicker { margin: 0 0 12px; color: var(--blue); font-size: 12px; font-weight: 850; letter-spacing: .16em; }
.section-heading h2, .final-cta h2, .support-banner h2, .article-next h2 { margin: 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.15; letter-spacing: -.045em; }
.section-heading > p:last-child { margin: 18px 0 0; color: var(--muted); font-size: 17px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-grid article { min-height: 290px; padding: 30px; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.feature-grid article > span, .detail-list article > span { color: var(--blue); font-size: 12px; font-weight: 850; }
.feature-grid h3 { margin: auto 0 12px; font-size: 26px; letter-spacing: -.03em; }
.feature-grid p { margin: 0 0 24px; color: var(--muted); }
.feature-grid a { color: var(--blue); font-size: 13px; font-weight: 800; }
.mode-grid article > small { display: inline-flex; align-self: flex-start; margin: 14px 0 22px; padding: 5px 9px; color: #526078; background: var(--blue-soft); border-radius: 99px; font-size: 10px; font-weight: 750; }

.ai-section { background: #fff; }
.ai-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.ai-compare article { min-height: 330px; padding: 36px; color: #d7dce7; background: #151a25; border-radius: var(--radius); }
.ai-compare article.is-ai { color: #e7ecff; background: linear-gradient(145deg, #284bd5, #406dff); box-shadow: 0 24px 60px rgba(49,92,245,.24); }
.ai-compare article > span { display: inline-flex; padding: 6px 10px; color: #aab3c5; background: rgba(255,255,255,.08); border-radius: 99px; font-size: 11px; font-weight: 800; }
.ai-compare .is-ai > span { color: #fff; background: rgba(255,255,255,.16); }
.ai-compare h3 { max-width: 430px; margin: 68px 0 24px; color: #fff; font-size: clamp(28px, 3vw, 40px); line-height: 1.2; letter-spacing: -.04em; }
.ai-compare ul, .platform-compare ul { margin: 0; padding: 0; display: grid; gap: 10px; list-style: none; }
.ai-compare li, .platform-compare li { position: relative; padding-left: 23px; }
.ai-compare li::before, .platform-compare li::before { content: "✓"; position: absolute; left: 0; color: #7d94ff; font-weight: 900; }
.ai-compare .is-ai li::before { color: #a7f2cf; }
.ai-compare a { display: inline-flex; margin-top: 28px; color: #fff; font-size: 13px; font-weight: 800; }
.ai-benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 18px; }
.ai-benefit-grid article { padding: 24px; background: #f6f8ff; border: 1px solid #e2e7f8; border-radius: 18px; }
.ai-benefit-grid span { color: var(--blue); font-size: 11px; font-weight: 850; }
.ai-benefit-grid h3 { margin: 24px 0 8px; font-size: 19px; }
.ai-benefit-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.platform-section { background: #eef2ff; }
.platform-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.platform-compare article { padding: 36px; background: #fff; border: 1px solid rgba(49,92,245,.13); border-radius: var(--radius); }
.platform-compare article:nth-child(2) { background: #f3fbf6; border-color: #dcefe3; }
.platform-compare article > span { color: var(--blue); font-size: 12px; font-weight: 850; }
.platform-compare h3 { margin: 36px 0 14px; font-size: 30px; line-height: 1.3; letter-spacing: -.035em; }
.platform-compare p { margin: 0 0 24px; color: var(--muted); }
.platform-compare li { color: #485166; }
.platform-compare a { display: inline-flex; margin-top: 28px; color: var(--blue); font-size: 13px; font-weight: 850; }

.screenshot-section { overflow: hidden; background: #111722; }
.screenshot-section .section-heading h2, .screenshot-section .section-heading > p:last-child { color: #fff; }
.screenshot-section .section-heading > p:last-child { color: #aeb7c8; }
.screenshot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: start; }
.screenshot-grid figure { margin: 0; padding: 9px; background: #202838; border: 1px solid rgba(255, 255, 255, .09); border-radius: 28px; }
.screenshot-grid figure:nth-child(even) { margin-top: 48px; }
.screenshot-grid img { aspect-ratio: 9 / 16; object-fit: cover; border-radius: 21px; }
.screenshot-grid figcaption { display: grid; gap: 4px; padding: 18px 10px 12px; }
.screenshot-grid strong { color: #fff; }
.screenshot-grid span { color: #aeb7c8; font-size: 12px; line-height: 1.55; }

.workflow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 56px; }
.workflow-grid article { padding: 24px; background: #202838; border: 1px solid rgba(255,255,255,.09); border-radius: 18px; }
.workflow-grid article > span { color: #758eff; font-size: 10px; font-weight: 850; }
.workflow-grid h3 { margin: 22px 0 8px; color: #fff; font-size: 18px; }
.workflow-grid p { margin: 0; color: #aeb7c8; font-size: 13px; }

.use-case-section { background: #fff; }
.use-case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.use-case-grid article { min-height: 200px; padding: 24px; display: flex; flex-direction: column; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; }
.use-case-grid article:nth-child(4n + 2) { background: #eef2ff; }
.use-case-grid article:nth-child(4n + 3) { background: #eef8f2; }
.use-case-grid article:nth-child(4n + 4) { background: #fff3eb; }
.use-case-grid span { color: var(--blue); font-size: 11px; font-weight: 850; }
.use-case-grid h3 { margin: auto 0 8px; font-size: 21px; }
.use-case-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.scenario-grid a { min-height: 300px; padding: 32px; display: flex; flex-direction: column; border-radius: var(--radius); background: var(--blue-soft); }
.scenario-grid a:nth-child(2) { background: #edf7f1; }
.scenario-grid a:nth-child(3) { background: #fff1e9; }
.scenario-grid span { color: var(--blue); font-size: 12px; font-weight: 850; }
.scenario-grid h3 { margin: auto 0 12px; font-size: 27px; letter-spacing: -.03em; }
.scenario-grid p { color: var(--muted); }
.scenario-grid b { margin-top: 14px; font-size: 13px; }

.download-section { background: #e8edff; }
.version-note { min-height: 24px; color: var(--blue) !important; font-size: 13px !important; font-weight: 750; }
.release-note { max-width: 760px; margin: 4px auto 0 !important; color: #5a6480 !important; font-size: 12px !important; }
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.download-card { position: relative; padding: 24px; display: grid; grid-template-columns: 48px 1fr auto; grid-template-rows: auto auto; gap: 2px 15px; align-items: center; background: #fff; border: 1px solid rgba(49, 92, 245, .12); border-radius: 18px; transition: transform .2s ease, box-shadow .2s ease; }
.download-card:hover { transform: translateY(-3px); box-shadow: 0 16px 35px rgba(49, 92, 245, .12); }
.download-card.is-recommended { border-color: var(--blue); box-shadow: 0 12px 30px rgba(49,92,245,.11); }
.recommended-label { position: absolute; right: 16px; top: -10px; padding: 3px 8px; color: #fff; background: var(--blue); border-radius: 99px; font-size: 9px; font-weight: 800; }
.platform-icon { grid-row: 1 / 3; width: 48px; height: 48px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 14px; }
.platform-icon svg { width: 24px; height: 24px; }
.download-card strong { font-size: 18px; }
.download-card small { color: var(--muted); }
.download-card b { grid-column: 3; grid-row: 1 / 3; color: var(--blue); font-size: 12px; }

.guide-preview { background: #fff; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.guide-grid > a { min-height: 310px; padding: 30px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); }
.guide-grid span { color: var(--blue); font-size: 12px; font-weight: 850; }
.guide-grid h3 { margin: 48px 0 14px; font-size: 23px; line-height: 1.4; }
.guide-grid p { color: var(--muted); font-size: 14px; }
.guide-grid b { margin-top: auto; color: var(--blue); font-size: 13px; }
.section-more { margin: 34px 0 0; text-align: center; }

.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item h3 { margin: 0; }
.faq-item button { width: 100%; padding: 23px 0; display: flex; justify-content: space-between; gap: 20px; color: var(--ink); border: 0; background: transparent; text-align: left; font-weight: 750; cursor: pointer; }
.faq-item button span { color: var(--blue); font-size: 23px; font-weight: 400; transition: transform .2s ease; }
.faq-item button[aria-expanded="true"] span { transform: rotate(45deg); }
.faq-answer { padding: 0 48px 22px 0; color: var(--muted); }
.faq-answer p { margin: 0; }

.final-cta { padding: 100px 0; color: #fff; background: var(--blue); text-align: center; }
.final-cta p { margin: 0 0 16px; color: #cfd9ff; font-weight: 750; }
.final-cta h2 { max-width: 820px; margin-inline: auto; }
.final-cta .button { margin-top: 30px; }

.sub-hero { padding: 78px 0 84px; background: linear-gradient(145deg, #fbfcff, #edf1ff); }
.sub-hero-grid { display: grid; grid-template-columns: 1.2fr .55fr; gap: 80px; align-items: center; }
.sub-hero h1 { font-size: clamp(42px, 5vw, 68px); }
.sub-hero-grid > div > p:not(.eyebrow) { max-width: 720px; margin: 26px 0 0; color: var(--muted); font-size: 18px; }
.sub-visual { justify-self: center; width: min(300px, 90%); margin: 0; padding: 8px; overflow: hidden; background: #121722; border-radius: 34px; box-shadow: var(--shadow); transform: rotate(2deg); }
.sub-visual img { border-radius: 27px; }
.highlight-section { padding-block: 58px; background: var(--ink); }
.highlight-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.highlight-grid article { padding: 20px 24px; border-left: 1px solid #3b4354; }
.highlight-grid span { color: #728cff; font-size: 11px; font-weight: 850; }
.highlight-grid p { margin: 10px 0 0; color: #fff; font-weight: 700; }
.detail-list { border-top: 1px solid var(--line); }
.detail-list article { padding: 34px 0; display: grid; grid-template-columns: 80px 1fr; gap: 20px; border-bottom: 1px solid var(--line); }
.detail-list h2 { margin: 0 0 10px; font-size: 28px; letter-spacing: -.03em; }
.detail-list p { max-width: 850px; margin: 0; color: var(--muted); }

.article-hero { padding: 82px 0 70px; background: linear-gradient(145deg, #fbfcff, #edf1ff); }
.article-hero h1 { font-size: clamp(40px, 5vw, 64px); }
.article-hero .container > p:not(.eyebrow) { max-width: 800px; margin: 24px 0 0; color: var(--muted); font-size: 18px; }
.article-meta { display: flex; gap: 20px; margin-top: 24px; color: #7a8190; font-size: 12px; }
.guide-index { display: grid; gap: 16px; }
.guide-index > a { padding: 32px; display: grid; grid-template-columns: 74px 1fr; gap: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.guide-index > a > span { color: var(--blue); font-size: 24px; font-weight: 800; }
.guide-index p { margin: 0 0 8px; color: var(--muted); }
.guide-index h2 { margin: 0 0 12px; font-size: 27px; }
.guide-index b { color: var(--blue); font-size: 13px; }
.support-banner { padding: 72px 0; color: #fff; background: var(--blue); }
.support-banner .container { display: flex; justify-content: space-between; gap: 30px; align-items: center; }
.support-banner p { margin: 0 0 8px; color: #d4dcff; }
.support-banner h2 { max-width: 800px; font-size: clamp(30px, 3vw, 42px); }

.article-layout { padding: 74px 0 20px; display: grid; grid-template-columns: 220px minmax(0, 720px); gap: 80px; justify-content: center; align-items: start; }
.article-toc { position: sticky; top: calc(var(--header-height) + 24px); display: grid; gap: 9px; }
.article-toc p { margin: 0 0 8px; font-weight: 800; }
.article-toc a { color: var(--muted); font-size: 13px; }
.article-toc a:hover { color: var(--blue); }
.article-body { font-size: 17px; }
.article-lede { margin: 0 0 52px; color: #4f5768; font-size: 20px; }
.article-body section { padding: 0 0 48px; }
.step-number { color: var(--blue); font-size: 12px; font-weight: 850; }
.article-body h2 { margin: 8px 0 15px; font-size: 30px; letter-spacing: -.03em; }
.article-body section p { margin: 0; color: var(--muted); }
.article-body aside { margin: 6px 0 50px; padding: 24px; background: #fff3e9; border-left: 4px solid var(--orange); border-radius: 0 16px 16px 0; }
.article-body aside p { margin: 8px 0 0; color: #6a554a; }
.article-next { padding: 70px 0 90px; text-align: center; }
.article-next p { color: var(--blue); font-weight: 800; }
.article-next .button { margin: 26px 6px 0; }

.not-found { min-height: 65vh; padding: 110px 0; text-align: center; }
.error-code { margin: 0; color: var(--blue); font-size: 100px; font-weight: 900; line-height: 1; }
.not-found h1 { margin-top: 18px; font-size: 44px; }
.not-found p:not(.error-code) { color: var(--muted); }
.not-found .hero-actions { justify-content: center; }

.site-footer { padding: 72px 0 28px; color: #d8dce5; background: #0e1119; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 50px; }
.brand-footer strong { color: #fff; }
.footer-brand p { max-width: 330px; color: #8e96a6; }
.footer-grid > div:not(.footer-brand) { display: flex; flex-direction: column; gap: 9px; }
.footer-grid h2 { margin: 0 0 10px; color: #fff; font-size: 14px; }
.footer-grid a { color: #9da5b5; font-size: 13px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { margin-top: 52px; padding-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 30px; color: #727b8d; border-top: 1px solid #242936; font-size: 11px; }
.footer-bottom p { margin: 0; }
.footer-bottom p:last-child { display: flex; gap: 18px; }
.footer-bottom a { display: inline-flex; align-items: center; gap: 6px; }

@media (max-width: 980px) {
  .menu-button { display: block; }
  .site-nav { position: fixed; top: var(--header-height); left: 0; right: 0; height: auto; padding: 18px 24px 26px; display: none; align-items: stretch; flex-direction: column; gap: 0; background: rgba(247, 248, 252, .98); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav > a { height: 46px; }
  .site-nav > a::after { display: none; }
  .site-nav .nav-download { margin-top: 8px; justify-content: center; }
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .hero-copy { max-width: 720px; }
  .hero-product-showcase { margin-inline: auto; }
  .trust-strip .container, .support-banner .container { align-items: flex-start; flex-direction: column; padding-block: 24px; }
  .trust-strip div div { justify-content: flex-start; }
  .download-grid, .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .screenshot-grid { grid-template-columns: repeat(2, 1fr); }
  .screenshot-grid figure:nth-child(even) { margin-top: 28px; }
  .ai-benefit-grid, .use-case-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
  .sub-hero-grid { grid-template-columns: 1fr .45fr; gap: 44px; }
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; gap: 32px; }
  .article-toc { position: static; padding: 20px; background: #fff; border-radius: 16px; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2; }
}

@media (max-width: 720px) {
  :root { --header-height: 66px; --radius: 19px; }
  .container { width: min(100% - 32px, var(--container)); }
  .brand { min-width: auto; }
  .brand img { width: 38px; height: 38px; }
  .brand small { display: none; }
  .hero { padding: 62px 0 72px; }
  .hero h1, .sub-hero h1, .article-hero h1 { font-size: 43px; }
  .hero-lede { font-size: 16px; }
  .hero-actions .button { flex: 1 1 160px; }
  .trust-strip div div { gap: 10px 16px; }
  .section { padding: 76px 0; }
  .section-heading { margin-bottom: 32px; }
  .section-heading h2, .final-cta h2 { font-size: 36px; }
  .feature-grid, .scenario-grid, .download-grid, .guide-grid, .ai-compare, .platform-compare, .workflow-grid { grid-template-columns: 1fr; }
  .feature-grid article, .scenario-grid a { min-height: 240px; }
  .ai-compare article { min-height: 290px; padding: 28px; }
  .ai-compare h3 { margin-top: 48px; }
  .ai-benefit-grid, .use-case-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-compare article { padding: 28px; }
  .screenshot-grid { margin-right: -16px; padding-right: 16px; grid-template-columns: repeat(4, minmax(210px, 70vw)); overflow-x: auto; scroll-snap-type: x mandatory; }
  .screenshot-grid figure, .screenshot-grid figure:nth-child(even) { margin-top: 0; scroll-snap-align: start; }
  .download-card { grid-template-columns: 44px 1fr auto; padding: 20px; }
  .platform-icon { width: 44px; height: 44px; }
  .sub-hero { padding: 56px 0 68px; }
  .sub-hero-grid { grid-template-columns: 1fr; }
  .sub-visual { width: min(260px, 75%); }
  .highlight-grid { grid-template-columns: 1fr; }
  .detail-list article { grid-template-columns: 48px 1fr; }
  .guide-index > a { grid-template-columns: 44px 1fr; padding: 24px 20px; }
  .article-hero { padding: 58px 0; }
  .article-layout { padding-top: 50px; }
  .article-body { font-size: 16px; }
  .article-lede { font-size: 18px; }
  .article-body h2 { font-size: 25px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-bottom p:last-child { flex-direction: column; gap: 8px; }
}

@media (max-width: 680px) {
  .hero-visual { height: calc((100vw - 32px) * .6924); overflow: hidden; }
  .hero-product-showcase { width: 650px; height: 450px; margin: 0; transform: scale(calc((100vw - 32px) / 650)); transform-origin: top left; }
}

@media (max-width: 480px) {
  .ai-benefit-grid, .use-case-grid { grid-template-columns: 1fr; }
  .use-case-grid article { min-height: 170px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}