:root {
    --sai-ink: #07142f;
    --sai-muted: #5c6880;
    --sai-line: #dce3ef;
    --sai-blue: #0758d9;
    --sai-blue-deep: #063b9d;
    --sai-cyan: #00a8d6;
    --sai-bg: #f6f8fc;
    --sai-white: #ffffff;
}

.ai-page { background: var(--sai-bg); color: var(--sai-ink); }
.ai-page main { overflow: hidden; }
.ai-page .navbar { background: rgba(255, 255, 255, .95); }
.sai-container { width: min(1200px, calc(100% - 64px)); margin: 0 auto; }
.sai-kicker { margin: 0 0 18px; color: var(--sai-blue); font-size: 13px; font-weight: 800; letter-spacing: .16em; }
.sai-breadcrumb { display: flex; gap: 10px; margin-bottom: 40px; color: #73809a; font-size: 14px; }
.sai-breadcrumb a { color: inherit; text-decoration: none; }

.sai-hero { position: relative; padding: 164px 0 88px; background: linear-gradient(135deg, #f9fbff 0%, #edf3fc 58%, #f7f9fd 100%); }
.sai-hero::before { position: absolute; top: 80px; right: -160px; width: 620px; height: 620px; border-radius: 50%; background: radial-gradient(circle, rgba(27, 111, 226, .13), transparent 68%); content: ""; }
.sai-hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(440px, .95fr); gap: 76px; align-items: center; }
.sai-hero h1 { margin: 0; font-size: clamp(48px, 4.9vw, 76px); line-height: 1.12; letter-spacing: -.055em; word-break: keep-all; }
.sai-hero h1 em { color: var(--sai-blue); font-style: normal; }
.sai-hero-lead { max-width: 680px; margin: 28px 0 0; color: #4b5871; font-size: 20px; line-height: 1.75; word-break: keep-all; }
.sai-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.sai-btn { display: inline-flex; min-height: 52px; padding: 0 24px; border: 1px solid transparent; border-radius: 10px; align-items: center; justify-content: center; color: inherit; font-size: 15px; font-weight: 750; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.sai-btn:hover { transform: translateY(-2px); }
.sai-btn-primary { background: var(--sai-blue); color: #fff; box-shadow: 0 14px 32px rgba(7, 88, 217, .2); }
.sai-btn-primary:hover { background: var(--sai-blue-deep); }
.sai-btn-secondary { border-color: #b9c5d8; background: rgba(255, 255, 255, .76); }
.sai-assurance { display: flex; flex-wrap: wrap; gap: 20px; margin: 28px 0 0; padding: 0; color: #516078; font-size: 13px; list-style: none; }
.sai-assurance li::before { display: inline-block; width: 6px; height: 6px; margin-right: 8px; border-radius: 50%; background: var(--sai-cyan); vertical-align: 2px; content: ""; }

.sai-hero-visual { position: relative; padding: 24px; border: 1px solid rgba(149, 169, 202, .48); border-radius: 24px; background: rgba(255, 255, 255, .78); box-shadow: 0 32px 80px rgba(34, 60, 105, .16); backdrop-filter: blur(14px); }
.sai-visual-top { display: flex; padding-bottom: 18px; border-bottom: 1px solid var(--sai-line); align-items: center; justify-content: space-between; }
.sai-visual-top span { font-size: 16px; font-weight: 800; }
.sai-visual-top small { color: #6c7890; font-size: 12px; }
.sai-flow-source { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 18px 0 12px; }
.sai-flow-source span { position: relative; padding: 18px 14px 16px 48px; border: 1px solid #dbe3f0; border-radius: 14px; background: #f8faff; }
.sai-flow-source i { position: absolute; top: 17px; left: 14px; color: var(--sai-blue); font-size: 11px; font-style: normal; font-weight: 800; }
.sai-flow-source b, .sai-flow-source small { display: block; }
.sai-flow-source b { font-size: 14px; }
.sai-flow-source small { margin-top: 5px; color: #758198; font-size: 11px; }
.sai-flow-core { padding: 24px; border-radius: 16px; background: linear-gradient(135deg, #073d9d, #0867dd 65%, #048bb9); color: #fff; box-shadow: 0 16px 36px rgba(7, 82, 190, .22); }
.sai-flow-core small, .sai-flow-core strong, .sai-flow-core p { display: block; }
.sai-flow-core small { opacity: .7; font-size: 10px; font-weight: 800; letter-spacing: .16em; }
.sai-flow-core strong { margin-top: 9px; font-size: 18px; }
.sai-flow-core p { margin: 8px 0 0; opacity: .78; font-size: 12px; }
.sai-flow-result { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.sai-flow-result span { display: flex; padding: 16px; border: 1px solid #dbe3f0; border-radius: 13px; background: #fff; align-items: center; gap: 9px; font-size: 13px; }
.sai-flow-result i { width: 8px; height: 8px; border: 2px solid #0c9fb9; border-radius: 50%; }
.sai-visual-note { margin-top: 14px; color: #78849a; font-size: 11px; text-align: center; }

.sai-trust { border-top: 1px solid #e1e6ef; border-bottom: 1px solid #e1e6ef; background: #fff; }
.sai-trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.sai-trust-grid div { padding: 28px 24px; border-right: 1px solid #e1e6ef; text-align: center; }
.sai-trust-grid div:first-child { border-left: 1px solid #e1e6ef; }
.sai-trust strong, .sai-trust span { display: block; }
.sai-trust strong { font-size: 22px; }
.sai-trust span { margin-top: 5px; color: #748096; font-size: 12px; }

.sai-section { padding: 108px 0; }
.sai-section-head { max-width: 720px; }
.sai-section-head h2 { margin: 0; font-size: clamp(34px, 3.3vw, 52px); line-height: 1.2; letter-spacing: -.04em; word-break: keep-all; }
.sai-section-head > p:last-child { margin: 20px 0 0; color: var(--sai-muted); font-size: 17px; line-height: 1.75; word-break: keep-all; }
.sai-solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 54px; }
.sai-solution-card { min-height: 310px; padding: 30px; border: 1px solid var(--sai-line); border-radius: 18px; background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.sai-solution-card:hover { transform: translateY(-4px); box-shadow: 0 22px 52px rgba(36, 56, 91, .09); }
.sai-solution-card > span { color: var(--sai-blue); font-size: 12px; font-weight: 800; }
.sai-solution-card h3 { margin: 28px 0 12px; font-size: 22px; letter-spacing: -.025em; }
.sai-solution-card p { margin: 0; color: #5f6b80; font-size: 14px; line-height: 1.72; }
.sai-solution-card ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 24px 0 0; padding: 0; list-style: none; }
.sai-solution-card li { padding: 7px 10px; border-radius: 7px; background: #eef3fb; color: #496078; font-size: 11px; }

.sai-demo-section { background: #07152d; color: #fff; }
.sai-demo-section .sai-kicker { color: #4bc7eb; }
.sai-section-head-light > p:last-child { color: #aebbd0; }
.sai-demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 52px; }
.sai-demo-card { padding: 16px 16px 22px; border: 1px solid rgba(160, 181, 216, .2); border-radius: 18px; background: #0d1d39; }
.sai-demo-preview { position: relative; height: 128px; padding: 16px; overflow: hidden; border-radius: 12px; background: linear-gradient(135deg, #edf5ff, #dbe9fb); color: #0a3c87; }
.sai-demo-preview::after { position: absolute; right: -30px; bottom: -45px; width: 150px; height: 150px; border-radius: 50%; background: rgba(255, 255, 255, .45); content: ""; }
.sai-demo-preview span { position: relative; z-index: 1; font-size: 11px; font-weight: 800; }
.sai-demo-preview i { display: block; position: relative; z-index: 1; width: 72%; height: 7px; margin-top: 13px; border-radius: 8px; background: rgba(14, 70, 145, .18); }
.sai-demo-preview i:nth-of-type(2) { width: 90%; }
.sai-demo-preview i:nth-of-type(3) { width: 56%; }
.sai-demo-preview.is-indigo { background: linear-gradient(135deg, #eef0ff, #dedffc); color: #4846a9; }
.sai-demo-preview.is-cyan { background: linear-gradient(135deg, #e7fbff, #d0f1f5); color: #067b8b; }
.sai-demo-preview.is-orange { background: linear-gradient(135deg, #fff5e8, #ffe3c4); color: #aa5d0a; }
.sai-demo-preview.is-green { background: linear-gradient(135deg, #ecfbf3, #d2f0df); color: #147349; }
.sai-demo-preview.is-purple { background: linear-gradient(135deg, #f6efff, #e8daf9); color: #7541a7; }
.sai-demo-card h3 { margin: 22px 0 10px; font-size: 19px; }
.sai-demo-card p { min-height: 70px; margin: 0; color: #aebbd0; font-size: 13px; line-height: 1.72; }
.sai-tags { display: flex; gap: 6px; margin-top: 16px; }
.sai-tags span { padding: 6px 9px; border: 1px solid rgba(135, 166, 215, .22); border-radius: 6px; color: #8eb5e8; font-size: 10px; }
.sai-demo-card > a { display: inline-block; margin-top: 20px; color: #fff; font-size: 13px; font-weight: 700; text-decoration: none; }
.sai-demo-card > a b { margin-left: 5px; color: #55cbef; }
.sai-demo-more { display: flex; margin-top: 28px; padding: 25px 28px; border: 1px solid rgba(160, 181, 216, .2); border-radius: 15px; background: rgba(255, 255, 255, .04); align-items: center; justify-content: space-between; gap: 24px; }
.sai-demo-more strong, .sai-demo-more span { display: block; }
.sai-demo-more strong { font-size: 17px; }
.sai-demo-more span { margin-top: 7px; color: #99a8bf; font-size: 12px; }
.sai-btn-light { border-color: rgba(255, 255, 255, .28); color: #fff; white-space: nowrap; }

.sai-production { background: #fff; }
.sai-production-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: start; }
.sai-production-list { margin: 0; padding: 0; list-style: none; }
.sai-production-list li { display: grid; grid-template-columns: 54px 1fr; padding: 24px 0; border-bottom: 1px solid var(--sai-line); gap: 16px; }
.sai-production-list li:first-child { border-top: 1px solid var(--sai-line); }
.sai-production-list > li > span { color: var(--sai-blue); font-size: 12px; font-weight: 800; }
.sai-production-list strong { font-size: 17px; }
.sai-production-list p { margin: 7px 0 0; color: #6a768c; font-size: 13px; line-height: 1.65; }

.sai-process { background: #eef3fa; }
.sai-process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 48px; }
.sai-process-grid article { padding: 28px; border-radius: 16px; background: #fff; }
.sai-process-grid span { color: var(--sai-blue); font-size: 11px; font-weight: 800; }
.sai-process-grid h3 { margin: 24px 0 10px; font-size: 19px; }
.sai-process-grid p { margin: 0; color: #667287; font-size: 13px; line-height: 1.65; }

.sai-faq { background: #fff; }
.sai-faq-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; }
.sai-faq-list details { border-bottom: 1px solid var(--sai-line); }
.sai-faq-list details:first-child { border-top: 1px solid var(--sai-line); }
.sai-faq-list summary { position: relative; padding: 24px 38px 24px 0; cursor: pointer; font-size: 16px; font-weight: 700; list-style: none; }
.sai-faq-list summary::-webkit-details-marker { display: none; }
.sai-faq-list summary::after { position: absolute; right: 4px; color: var(--sai-blue); content: "+"; }
.sai-faq-list details[open] summary::after { content: "−"; }
.sai-faq-list details p { margin: -6px 0 24px; color: #667287; font-size: 14px; line-height: 1.72; }

.sai-contact { padding: 90px 0; background: linear-gradient(120deg, #073b9a, #075ed6 62%, #048bb2); color: #fff; }
.sai-contact .sai-kicker { color: #8de4f5; }
.sai-contact-inner > div:first-child { max-width: 690px; }
.sai-contact h2 { margin: 0; font-size: clamp(36px, 4vw, 56px); letter-spacing: -.045em; }
.sai-contact p { margin: 18px 0 0; color: rgba(255, 255, 255, .78); font-size: 16px; line-height: 1.7; }
.sai-inquiry-types { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.sai-inquiry-types span { padding: 9px 13px; border: 1px solid rgba(255, 255, 255, .24); border-radius: 999px; background: rgba(255, 255, 255, .08); font-size: 12px; }
.sai-btn-white { background: #fff; color: #0645a8; }
.sai-contact-link { display: inline-flex; min-height: 52px; align-items: center; color: #fff; font-size: 14px; text-decoration: none; }

@media (max-width: 1024px) {
    .sai-hero-grid { grid-template-columns: 1fr; gap: 52px; }
    .sai-hero-copy { max-width: 760px; }
    .sai-hero-visual { max-width: 680px; }
    .sai-solution-grid, .sai-demo-grid { grid-template-columns: repeat(2, 1fr); }
    .sai-production-grid, .sai-faq-grid { grid-template-columns: 1fr; gap: 48px; }
    .sai-process-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
    .sai-container { width: min(100% - 36px, 1200px); }
    .sai-hero { padding: 122px 0 62px; }
    .sai-breadcrumb { margin-bottom: 28px; }
    .sai-hero h1 { font-size: 42px; line-height: 1.16; }
    .sai-hero-lead { margin-top: 22px; font-size: 17px; line-height: 1.65; }
    .sai-actions { display: grid; grid-template-columns: 1fr; }
    .sai-btn { width: 100%; }
    .sai-assurance { gap: 9px 16px; }
    .sai-hero-visual { padding: 17px; border-radius: 18px; }
    .sai-flow-source, .sai-flow-result { grid-template-columns: 1fr; }
    .sai-flow-core { padding: 20px; }
    .sai-trust-grid { grid-template-columns: repeat(2, 1fr); }
    .sai-trust-grid div { padding: 22px 12px; border-bottom: 1px solid #e1e6ef; }
    .sai-trust-grid div:nth-child(odd) { border-left: 1px solid #e1e6ef; }
    .sai-section { padding: 76px 0; }
    .sai-section-head h2 { font-size: 34px; }
    .sai-section-head > p:last-child { font-size: 15px; }
    .sai-solution-grid, .sai-demo-grid, .sai-process-grid { grid-template-columns: 1fr; margin-top: 38px; }
    .sai-solution-card { min-height: 0; padding: 25px; }
    .sai-demo-card p { min-height: 0; }
    .sai-demo-more { align-items: stretch; flex-direction: column; }
    .sai-production-list li { grid-template-columns: 42px 1fr; }
    .sai-contact { padding: 72px 0; }
    .sai-contact h2 { font-size: 38px; }
}

@media (prefers-reduced-motion: reduce) {
    .sai-btn, .sai-solution-card { transition: none; }
}

.sai-btn:focus-visible, .sai-demo-card a:focus-visible, .sai-faq-list summary:focus-visible { outline: 3px solid #55ccef; outline-offset: 3px; }