:root {
  --purple-950: #241b52;
  --purple-900: #2e2566;
  --purple-700: #4b3d96;
  --purple-500: #6a58c0;
  --purple-100: #efeafa;
  --purple-050: #f8f6fd;
  --gold-700: #b58a00;
  --gold: #f2b90d;
  --ink: #28234b;
  --muted: #6f6a88;
  --line: #e5dff4;
  --white: #fff;
  --shell: 1180px;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(46, 37, 102, .11);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { color: var(--ink); background: var(--purple-050); font-family: var(--font); font-size: 16px; line-height: 1.8; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
.shell { width: min(calc(100% - 48px), var(--shell)); margin-inline: auto; }
.section { padding: 92px 0; }
.section-white { background: var(--white); }
.section-tint { background: linear-gradient(150deg, #fbfaff, var(--purple-100)); }
.section-dark { color: #fff; background: radial-gradient(circle at 80% 20%, rgba(106,88,192,.45), transparent 30%), linear-gradient(135deg, var(--purple-950), var(--purple-900)); }
.section-kicker { color: var(--gold-700); font-size: 12px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }
.section-title { margin-top: 7px; color: var(--purple-900); font-size: clamp(30px, 4vw, 44px); line-height: 1.28; letter-spacing: .01em; }
.section-dark .section-title { color: #fff; }
.section-lead { max-width: 760px; margin-top: 14px; color: var(--muted); font-size: 16px; }
.section-dark .section-lead { color: #d8d3ed; }
.title-line { display: flex; gap: 10px; margin-top: 18px; }
.title-line::before, .title-line::after { content: ""; height: 5px; border-radius: 5px; }
.title-line::before { width: 96px; background: var(--gold); }
.title-line::after { width: 42px; background: var(--purple-700); }
.section-dark .title-line::after { background: #b7abe8; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 10px 25px; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 800; transition: transform .18s, box-shadow .18s, background .18s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(120deg, var(--purple-700), var(--purple-500)); box-shadow: 0 10px 26px rgba(75,61,150,.3); }
.btn-secondary { color: var(--purple-700); border-color: var(--purple-700); background: rgba(255,255,255,.76); }
.btn-light { color: var(--purple-900); background: #fff; }
.text-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; color: var(--purple-700); font-size: 14px; font-weight: 800; }
.text-link::after { content: "→"; transition: transform .18s; }
.text-link:hover::after { transform: translateX(4px); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid rgba(242,185,13,.65); outline-offset: 3px; }

/* Header and two-level navigation */
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); box-shadow: 0 8px 30px rgba(46,37,102,.06); backdrop-filter: blur(16px); }
.site-header::after { content: ""; display: block; height: 3px; background: linear-gradient(90deg, var(--gold) 0 21%, var(--purple-700) 21% 100%); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.brand { display: inline-flex; align-items: center; color: var(--purple-700); }
.brand-logo { display: block; width: 238px; height: 56px; overflow: hidden; }
.brand-logo img { width: 258px; max-width: none; transform: translate(-11px, -39px); }
.main-nav { display: flex; align-items: center; gap: 2px; }
.nav-link, .nav-trigger { display: flex; align-items: center; gap: 5px; min-height: 42px; padding: 8px 13px; border: 0; border-radius: 10px; color: var(--ink); background: transparent; font-size: 14px; font-weight: 700; white-space: nowrap; cursor: pointer; transition: color .16s, background .16s; }
.nav-link:hover, .nav-trigger:hover, .nav-link.is-active, .nav-group.is-active > .nav-trigger, .nav-group.is-open > .nav-trigger { color: var(--purple-700); background: var(--purple-100); }
.nav-group { position: relative; }
.nav-submenu { position: absolute; left: 0; top: calc(100% + 13px); width: 320px; padding: 10px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255,255,255,.98); box-shadow: 0 24px 60px rgba(46,37,102,.18); opacity: 0; visibility: hidden; transform: translateY(8px); pointer-events: none; transition: opacity .17s, transform .17s, visibility .17s; }
.nav-submenu::before { content: ""; position: absolute; left: 0; right: 0; top: -14px; height: 14px; }
.nav-group:hover .nav-submenu, .nav-group:focus-within .nav-submenu, .nav-group.is-open .nav-submenu { opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
.nav-submenu a { display: block; padding: 11px 12px; border-radius: 10px; }
.nav-submenu a:hover { background: var(--purple-100); }
.nav-submenu b { display: block; }
.nav-submenu b { color: var(--purple-900); font-size: 14px; }
.nav-submenu-wide { width: 370px; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 0; border-radius: 10px; background: var(--purple-100); cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--purple-700); }

/* Home */
.home-hero { position: relative; min-height: 610px; overflow: hidden; background: linear-gradient(155deg, #fff 0%, #f5f1fc 58%, #e9e0fa 100%); }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: 1; }
.hero-fade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.88) 0%, rgba(255,255,255,.68) 39%, rgba(255,255,255,.08) 68%); }
.hero-content { position: relative; z-index: 2; max-width: 780px; padding: 112px 0 138px; }
.hero-eyebrow { color: var(--purple-700); font-size: 12px; font-weight: 900; letter-spacing: .32em; text-transform: uppercase; }
.home-hero h1 { margin-top: 14px; color: var(--purple-900); font-size: clamp(40px, 5vw, 61px); line-height: 1.2; letter-spacing: .025em; }
.hero-subtitle { margin-top: 12px; color: var(--purple-900); font-size: 18px; font-weight: 800; letter-spacing: .28em; }
.hero-copy { max-width: 580px; margin-top: 20px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-bird-window { display: none; }
.hero-metrics { position: absolute; z-index: 4; left: 0; right: 0; bottom: 0; background: linear-gradient(120deg, var(--purple-950), var(--purple-700)); }
.hero-metrics .shell { display: grid; grid-template-columns: repeat(3, 1fr); }
.metric { padding: 24px 18px; text-align: center; border-right: 1px solid rgba(255,255,255,.14); }
.metric:last-child { border-right: 0; }
.metric b { display: block; color: var(--gold); font-size: 29px; }
.metric span { color: #d9d4ee; font-size: 13px; }
.home-split { display: grid; grid-template-columns: 1.08fr .92fr; gap: 62px; align-items: center; }
.home-split p { margin-top: 22px; color: var(--muted); }
.image-frame { position: relative; overflow: hidden; border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.image-frame img { width: 100%; min-height: 360px; object-fit: cover; }
.image-frame::after { content: "SDC"; position: absolute; right: 20px; bottom: 12px; color: rgba(255,255,255,.86); font-size: 44px; font-weight: 900; letter-spacing: .08em; }
.image-frame.no-label::after { display: none; }
.feature-grid { display: grid; gap: 24px; margin-top: 38px; }
.feature-grid.two { grid-template-columns: repeat(2, 1fr); }
.feature-grid.three { grid-template-columns: repeat(3, 1fr); }
.feature-card { display: flex; flex-direction: column; min-height: 100%; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 36px rgba(46,37,102,.07); transition: transform .2s, box-shadow .2s; }
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.feature-card-media { display: grid; place-items: center; height: 250px; padding: 24px; overflow: hidden; background: linear-gradient(145deg, #fff, var(--purple-100)); }
.feature-card-media img { width: 100%; height: 100%; object-fit: contain; }
.feature-card-media.cover { padding: 0; }
.feature-card-media.cover img { object-fit: cover; }
.feature-card-media.product-wide { padding: 0; background: #100b2c; }
.feature-card-media.product-wide img { object-fit: cover; }
.feature-card-body { display: flex; flex: 1; flex-direction: column; padding: 25px 26px 27px; }
.feature-card-body h3 { color: var(--purple-900); font-size: 22px; line-height: 1.4; }
.feature-card-body p { margin-top: 9px; color: var(--muted); font-size: 14px; }
.feature-card-body .text-link { margin-top: auto; padding-top: 15px; }
.home-cta { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.home-cta h2 { font-size: clamp(28px, 4vw, 42px); line-height: 1.35; }
.home-cta p { max-width: 670px; margin-top: 9px; color: #d8d3ed; }

/* Secondary pages */
.page-hero { position: relative; overflow: hidden; padding: 92px 0 76px; background: linear-gradient(150deg, #fff, var(--purple-100)); }
.page-hero::after { content: ""; position: absolute; right: -120px; top: -170px; width: 500px; height: 500px; border: 1px solid rgba(75,61,150,.14); border-radius: 50%; box-shadow: 0 0 0 70px rgba(75,61,150,.035), 0 0 0 140px rgba(75,61,150,.025); }
.breadcrumb { position: relative; z-index: 2; color: var(--muted); font-size: 13px; }
.breadcrumb a:hover { color: var(--purple-700); }
.page-hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr .82fr; gap: 58px; align-items: center; margin-top: 27px; }
.page-hero h1 { color: var(--purple-900); font-size: clamp(38px, 5vw, 56px); line-height: 1.23; }
.page-hero .en { margin-top: 5px; color: var(--purple-700); font-size: 12px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }
.page-hero p { max-width: 660px; margin-top: 18px; color: var(--muted); }
.page-visual { display: grid; place-items: center; min-height: 330px; padding: 24px; overflow: hidden; border: 1px solid rgba(75,61,150,.12); border-radius: var(--radius); background: rgba(255,255,255,.78); box-shadow: var(--shadow); }
.page-visual img { width: 100%; max-height: 360px; object-fit: contain; }
.page-visual.cover { padding: 0; }
.page-visual.cover img { height: 360px; max-height: none; object-fit: cover; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 34px; }
.info-card { padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.info-card h3 { color: var(--purple-900); font-size: 18px; }
.info-card p { margin-top: 8px; color: var(--muted); font-size: 14px; }
.info-card.gold-top { border-top: 5px solid var(--gold); }
.value-list { display: grid; gap: 13px; margin-top: 34px; }
.value-row { display: grid; grid-template-columns: 240px 1fr; gap: 20px; padding: 18px 24px; border-radius: 13px; background: rgba(255,255,255,.9); }
.value-row b { color: var(--purple-900); }
.value-row span { color: var(--muted); font-size: 14px; }
.application-card .feature-card-media { height: 220px; }
.application-card .feature-card-body { padding: 21px 23px 24px; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; margin-top: 34px; }
.stat-card { padding: 24px; border-radius: var(--radius); background: var(--purple-100); }
.stat-card b { display: block; color: var(--purple-700); font-size: 29px; line-height: 1.2; }
.stat-card span { display: block; margin-top: 6px; color: var(--purple-900); font-size: 14px; font-weight: 800; }
.stat-card p { margin-top: 4px; color: var(--muted); font-size: 12px; }
.spec-wrap { margin-top: 30px; overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.spec-table { width: 100%; min-width: 720px; border-collapse: collapse; background: #fff; font-size: 14px; }
.spec-table th, .spec-table td { padding: 13px 16px; border-bottom: 1px solid var(--line); text-align: center; }
.spec-table thead th { color: #fff; background: linear-gradient(120deg, var(--purple-950), var(--purple-700)); }
.spec-table tbody th { width: 210px; color: var(--purple-900); background: var(--purple-100); text-align: left; }
.feature-list { display: grid; gap: 10px; margin-top: 22px; list-style: none; }
.feature-list li { position: relative; padding-left: 22px; color: var(--muted); font-size: 14px; }
.feature-list li::before { content: ""; position: absolute; left: 0; top: .75em; width: 11px; height: 4px; border-radius: 4px; background: var(--gold); }
.product-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 55px; align-items: center; }
.product-layout.reverse { grid-template-columns: 1.1fr .9fr; }
.product-layout.reverse .product-image { order: 2; }
.product-image { display: grid; place-items: center; min-height: 390px; padding: 30px; border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.product-image img { width: 100%; max-height: 430px; object-fit: contain; }
.product-image.cover { padding: 0; overflow: hidden; background: #0d0a25; }
.product-image.cover img { height: 430px; max-height: none; object-fit: cover; }
.product-copy h2 { color: var(--purple-900); font-size: clamp(30px, 4vw, 42px); line-height: 1.3; }
.product-copy .en { color: var(--purple-700); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.product-copy > p { margin-top: 16px; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.tags span { padding: 6px 15px; border: 1px solid var(--line); border-radius: 999px; color: var(--purple-900); background: #fff; font-size: 13px; font-weight: 700; }

/* About */
.about-panel { display: grid; grid-template-columns: 1.15fr .85fr; gap: 62px; align-items: center; }
.about-copy p { margin-top: 20px; color: var(--muted); font-size: 16px; }
.company-name { white-space: nowrap; font-size: clamp(28px, 3vw, 40px); }
.map-wrap { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.map-card { position: relative; display: block; min-height: 360px; overflow: hidden; background-color: #f5f2fc; background-image: linear-gradient(31deg, transparent 46%, rgba(75,61,150,.16) 47% 50%, transparent 51%), linear-gradient(148deg, transparent 45%, rgba(75,61,150,.11) 46% 49%, transparent 50%), linear-gradient(90deg, rgba(75,61,150,.08) 1px, transparent 1px), linear-gradient(rgba(75,61,150,.08) 1px, transparent 1px); background-size: 250px 170px, 310px 210px, 42px 42px, 42px 42px; }
.map-card::before { content: ""; position: absolute; inset: 16% -12% 13% -15%; border: 14px solid rgba(242,185,13,.72); border-left-color: transparent; border-right-color: transparent; border-radius: 50%; transform: rotate(-9deg); }
.map-card::after { content: "北京研发中心"; position: absolute; left: 50%; top: calc(50% + 54px); transform: translateX(-50%); color: var(--purple-900); font-size: 14px; font-weight: 900; letter-spacing: .08em; white-space: nowrap; }
.map-pin { position: absolute; z-index: 2; left: 50%; top: 50%; display: grid; place-items: center; width: 64px; height: 64px; transform: translate(-50%, -50%) rotate(45deg); border: 7px solid #fff; border-radius: 50% 50% 50% 10%; color: #fff; background: var(--purple-700); box-shadow: 0 16px 34px rgba(46,37,102,.28); }
.map-pin span { transform: rotate(-45deg); font-size: 24px; font-weight: 900; }
.map-address { padding: 21px 24px 24px; text-align: center; }
.map-address span { display: block; color: var(--gold-700); font-size: 11px; font-weight: 900; letter-spacing: .18em; text-transform: uppercase; }
.map-address b { display: block; margin-top: 5px; color: var(--purple-900); font-size: 17px; }
.address-card { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; margin-top: 34px; padding: 25px 28px; border-radius: var(--radius); color: #fff; background: linear-gradient(120deg, var(--purple-950), var(--purple-700)); }
.address-card .icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; color: var(--purple-900); background: var(--gold); font-size: 21px; font-weight: 900; }
.address-card span { display: block; color: #cfc9e8; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.address-card b { display: block; margin-top: 4px; font-size: 18px; }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 1.12fr .88fr; gap: 42px; align-items: start; }
.contact-form { padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.form-field { display: grid; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { color: var(--purple-900); font-size: 13px; font-weight: 800; }
.form-field input, .form-field textarea, .form-field select { width: 100%; border: 1px solid var(--line); border-radius: 11px; color: var(--ink); background: var(--purple-050); padding: 12px 14px; outline: 0; transition: border .15s, box-shadow .15s; }
.form-field textarea { min-height: 140px; resize: vertical; }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--purple-500); box-shadow: 0 0 0 4px rgba(106,88,192,.12); }
.form-actions { display: flex; align-items: center; gap: 16px; margin-top: 22px; }
.form-status { color: var(--muted); font-size: 12px; }
.contact-side { display: grid; gap: 18px; }
.contact-card { padding: 27px; border-radius: var(--radius); color: #fff; background: linear-gradient(135deg, var(--purple-950), var(--purple-700)); }
.contact-card h2 { font-size: 24px; }
.contact-card p { margin-top: 10px; color: #d8d3ed; }
.contact-card a { display: inline-block; margin-top: 16px; color: var(--gold); font-size: 19px; font-weight: 900; }
.contact-card a + a { display: block; margin-top: 8px; }
.contact-qr { display: grid; grid-template-columns: 168px 1fr; gap: 22px; align-items: center; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.contact-qr img { width: 168px; }
.contact-qr h3 { color: var(--purple-900); }
.contact-qr p { margin-top: 6px; color: var(--muted); font-size: 13px; }
.static-note { margin-top: 14px; color: #8c86a5; font-size: 12px; }

/* University program */
.university-intro { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 34px; }
.university-layer { position: relative; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 34px rgba(46,37,102,.07); }
.university-layer::after { content: attr(data-layer); position: absolute; right: 15px; top: 4px; color: rgba(75,61,150,.08); font-size: 64px; font-weight: 900; }
.university-layer h3 { position: relative; z-index: 1; color: var(--purple-900); font-size: 21px; }
.university-layer p { position: relative; z-index: 1; margin-top: 9px; color: var(--muted); font-size: 14px; }
.course-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 36px; }
.course-panel { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 34px rgba(46,37,102,.07); }
.course-panel h3 { padding: 18px 22px; color: #fff; background: linear-gradient(120deg, var(--purple-950), var(--purple-700)); font-size: 20px; }
.lab-list { display: grid; gap: 0; padding: 8px 22px 17px; list-style: none; counter-reset: labs; }
.lab-list li { position: relative; padding: 12px 0 12px 50px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; counter-increment: labs; }
.lab-list li:last-child { border-bottom: 0; }
.lab-list li::before { content: "LAB" counter(labs); position: absolute; left: 0; top: 13px; color: var(--purple-700); font-size: 11px; font-weight: 900; letter-spacing: .05em; }
.download-panel { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 34px; padding: 26px 30px; border-radius: var(--radius); color: #fff; background: linear-gradient(120deg, var(--purple-950), var(--purple-700)); }
.download-panel p { color: #d8d3ed; font-size: 14px; }

/* Footer */
.site-footer { color: #c4bfdf; background: var(--purple-950); }
.footer-grid { display: grid; grid-template-columns: 1.35fr repeat(4, 1fr) .75fr; gap: 32px; padding-top: 54px; padding-bottom: 46px; }
.footer-brand img { width: 142px; }
.footer-brand p { max-width: 230px; margin-top: 14px; color: #dedaf0; font-size: 13px; }
.footer-brand a { display: inline-block; margin-top: 8px; color: var(--gold); font-size: 13px; font-weight: 800; }
.footer-column { display: flex; flex-direction: column; align-items: flex-start; gap: 7px; }
.footer-column h2 { margin-bottom: 5px; color: #fff; font-size: 14px; }
.footer-column a { color: #b8b2d7; font-size: 12.5px; overflow-wrap: anywhere; }
.footer-column a:hover { color: var(--gold); }
.footer-qr { text-align: center; }
.footer-qr img { width: 98px; margin-inline: auto; border-radius: 8px; background: #fff; padding: 4px; }
.footer-qr span { display: block; margin-top: 6px; font-size: 12px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); }
.footer-bottom .shell { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 18px; padding-bottom: 18px; }
.footer-bottom p, .footer-bottom a { color: #918ab7; font-size: 11px; }
.footer-bottom div { display: flex; gap: 18px; }
.footer-bottom a:hover { color: var(--gold); }

@media (max-width: 1050px) {
  .menu-toggle { display: block; }
  .main-nav { position: absolute; left: 0; right: 0; top: 78px; display: none; max-height: calc(100vh - 86px); overflow-y: auto; flex-direction: column; align-items: stretch; padding: 14px 24px 22px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 24px 50px rgba(46,37,102,.15); }
  .main-nav.is-open { display: flex; }
  .nav-link, .nav-trigger { width: 100%; justify-content: space-between; }
  .nav-submenu, .nav-submenu-wide { position: static; display: none; width: auto; margin: 2px 0 7px 12px; padding: 5px; border: 0; border-left: 2px solid var(--gold); border-radius: 0 10px 10px 0; background: var(--purple-050); box-shadow: none; opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
  .nav-group:hover .nav-submenu, .nav-group:focus-within .nav-submenu { display: none; }
  .nav-group.is-open .nav-submenu { display: block; }
  .nav-submenu::before { display: none; }
  .home-split, .page-hero-grid, .product-layout, .product-layout.reverse, .about-panel, .contact-layout { grid-template-columns: 1fr; }
  .product-layout.reverse .product-image { order: 0; }
  .feature-grid.three, .university-intro { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 700px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .section { padding: 68px 0; }
  .header-inner { height: 72px; }
  .brand-logo { width: 196px; height: 48px; }
  .brand-logo img { width: 212px; transform: translate(-9px, -32px); }
  .main-nav { top: 72px; }
  .home-hero { min-height: 700px; }
  .hero-bg { width: 100%; opacity: .5; }
  .hero-fade { background: linear-gradient(90deg, rgba(250,248,254,.95), rgba(248,245,253,.74)); }
  .hero-content { padding: 78px 0 188px; }
  .hero-metrics .shell { grid-template-columns: 1fr; }
  .metric { padding: 11px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.11); }
  .metric:last-child { border-bottom: 0; }
  .metric b { display: inline; margin-right: 10px; font-size: 21px; }
  .feature-grid.two, .feature-grid.three, .content-grid, .stats-grid, .form-grid, .footer-grid, .university-intro, .course-grid { grid-template-columns: 1fr; }
  .home-cta { align-items: flex-start; flex-direction: column; }
  .page-hero { padding: 66px 0 58px; }
  .page-visual, .product-image { min-height: 270px; }
  .value-row { grid-template-columns: 1fr; gap: 5px; }
  .form-field.full { grid-column: auto; }
  .contact-form { padding: 24px 20px; }
  .contact-qr { grid-template-columns: 120px 1fr; }
  .contact-qr img { width: 120px; }
  .company-name { white-space: normal; }
  .download-panel { align-items: flex-start; flex-direction: column; }
  .footer-grid { gap: 26px; }
  .footer-bottom .shell { align-items: flex-start; flex-direction: column; }
}

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