*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg: #F7F9FC;
    --bg-card: #FFFFFF;
    --bg-nav: rgba(255,255,255,0.92);
    --bg-footer: #0F172A;
    --bg-banner: linear-gradient(135deg, #1B2A4A 0%, #0F1B33 60%, #0A1226 100%);
    --bg-tag: #E8EEF9;
    --bg-hover: #F0F4FB;
    --bg-input: #FFFFFF;
    --text-primary: #0B1A2F;
    --text-secondary: #1F2E45;
    --text-muted: #3E4E66;
    --text-light: #6B7A90;
    --text-on-dark: #F1F5F9;
    --text-on-dark-muted: #CBD5E1;
    --text-link: #1A5BB8;
    --text-link-hover: #0D3D8A;
    --text-btn: #FFFFFF;
    --brand: #2F6BFF;
    --brand-dark: #1A4FCC;
    --brand-light: #5B8CFF;
    --accent: #FF7A45;
    --border: #D8E0ED;
    --border-light: #E8EEF6;
    --shadow: 0 4px 20px rgba(11,26,47,0.08);
    --shadow-lg: 0 12px 40px rgba(11,26,47,0.12);
    --radius: 14px;
    --radius-sm: 8px;
    --transition: 0.25s ease;
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition), color var(--transition);
}
body.dark {
    --bg: #0B0E14;
    --bg-card: #151B28;
    --bg-nav: rgba(21,27,40,0.94);
    --bg-footer: #070A10;
    --bg-banner: linear-gradient(135deg, #0E1626 0%, #101B30 60%, #0A1220 100%);
    --bg-tag: #1E2A40;
    --bg-hover: #1A2233;
    --bg-input: #1A2233;
    --text-primary: #F1F5F9;
    --text-secondary: #E2E8F0;
    --text-muted: #CBD5E1;
    --text-light: #94A3B8;
    --text-on-dark: #F8FAFC;
    --text-on-dark-muted: #CBD5E1;
    --text-link: #7BA9FF;
    --text-link-hover: #A8C6FF;
    --text-btn: #0B0E14;
    --brand: #5B8CFF;
    --brand-dark: #8AAFFF;
    --brand-light: #3B6FE0;
    --accent: #FF9A6B;
    --border: #2A3548;
    --border-light: #1E2A40;
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.55);
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--text-link); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--text-link-hover); }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.navbar {
    position: sticky; top: 0; z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--transition), border-color var(--transition);
}
.nav-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 1.25rem; font-weight: 800;
    color: var(--text-primary); letter-spacing: 0.5px;
}
.nav-logo svg { width: 34px; height: 34px; flex-shrink: 0; }
.nav-logo span { color: var(--text-primary); }
.nav-logo .brand-dot { color: var(--brand); }
.nav-menu {
    display: flex; align-items: center; gap: 6px;
}
.nav-menu a {
    padding: 8px 14px; border-radius: var(--radius-sm);
    font-size: 0.92rem; font-weight: 500;
    color: var(--text-secondary);
    transition: background var(--transition), color var(--transition);
}
.nav-menu a:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.btn-icon {
    width: 40px; height: 40px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-hover); border: 1px solid var(--border-light);
    cursor: pointer; color: var(--text-secondary);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-icon:hover { background: var(--brand); color: var(--text-btn); border-color: var(--brand); }
.btn-icon svg { width: 20px; height: 20px; }
.mobile-toggle { display: none; }

.search-wrap { position: relative; display: flex; align-items: center; }
.search-input {
    width: 0; opacity: 0; padding: 0; border: none;
    background: var(--bg-input); color: var(--text-primary);
    border-radius: 20px; height: 38px; font-size: 0.88rem;
    transition: width 0.3s ease, opacity 0.3s ease, padding 0.3s ease, border-color var(--transition);
    outline: none; border: 1px solid transparent;
}
.search-wrap.open .search-input {
    width: 200px; opacity: 1; padding: 0 16px; border-color: var(--border);
}
.search-input::placeholder { color: var(--text-light); }
.search-input:focus { border-color: var(--brand); }

.banner {
    position: relative; overflow: hidden;
    background: var(--bg-banner);
    min-height: 520px;
    display: flex; align-items: center;
    transition: background var(--transition);
}
.banner-slides { position: absolute; inset: 0; }
.banner-slide {
    position: absolute; inset: 0;
    opacity: 0; transition: opacity 0.8s ease;
    display: flex; align-items: center;
}
.banner-slide.active { opacity: 1; }
.banner-content {
    position: relative; z-index: 2; max-width: 720px;
    padding: 60px 0;
}
.banner-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(47,107,255,0.18); border: 1px solid rgba(91,140,255,0.35);
    color: #B8CFFF; padding: 6px 16px; border-radius: 20px;
    font-size: 0.82rem; font-weight: 600; margin-bottom: 22px;
    letter-spacing: 0.5px;
}
body.dark .banner-badge { color: #C8DCFF; background: rgba(91,140,255,0.2); border-color: rgba(91,140,255,0.5); }
.banner h1 {
    font-size: 2.9rem; font-weight: 800; line-height: 1.25;
    color: #FFFFFF; margin-bottom: 20px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.35);
    letter-spacing: -0.5px;
}
.banner h1 em {
    font-style: normal;
    background: linear-gradient(90deg, #7BA9FF, #FF9A6B);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: #7BA9FF;
}
.banner p {
    font-size: 1.08rem; color: #D6E2F5; line-height: 1.85;
    margin-bottom: 32px; max-width: 600px;
    text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}
body.dark .banner p { color: #DCE6F5; }
.banner-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 13px 28px; border-radius: 30px;
    font-size: 0.95rem; font-weight: 600;
    cursor: pointer; border: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background var(--transition), color var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
    background: var(--brand); color: #FFFFFF;
    box-shadow: 0 6px 20px rgba(47,107,255,0.4);
}
.btn-primary:hover { background: var(--brand-dark); color: #FFFFFF; box-shadow: 0 8px 28px rgba(47,107,255,0.55); }
body.dark .btn-primary { background: var(--brand); color: #0B0E14; }
body.dark .btn-primary:hover { background: var(--brand-dark); color: #0B0E14; }
.btn-outline {
    background: rgba(255,255,255,0.1); color: #FFFFFF;
    border: 1.5px solid rgba(255,255,255,0.45);
}
.btn-outline:hover { background: rgba(255,255,255,0.2); color: #FFFFFF; border-color: #FFFFFF; }
.banner-dots {
    position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 3;
}
.banner-dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: rgba(255,255,255,0.35); cursor: pointer;
    transition: background 0.3s, width 0.3s;
}
.banner-dot.active { background: #FFFFFF; width: 28px; border-radius: 6px; }

.section { padding: 80px 0; }
.section-alt { background: var(--bg-card); transition: background var(--transition); }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.section-label {
    display: inline-block; font-size: 0.8rem; font-weight: 700;
    color: var(--brand); letter-spacing: 2px; text-transform: uppercase;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: 2rem; font-weight: 800; color: var(--text-primary);
    margin-bottom: 16px; line-height: 1.35; letter-spacing: -0.3px;
}
.section-header p {
    font-size: 1rem; color: var(--text-muted); line-height: 1.85;
}

.brand-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.brand-intro-text h2 { font-size: 1.9rem; font-weight: 800; color: var(--text-primary); margin-bottom: 20px; line-height: 1.4; }
.brand-intro-text p { color: var(--text-muted); margin-bottom: 16px; font-size: 1rem; line-height: 1.9; }
.brand-intro-text strong { color: var(--text-secondary); font-weight: 700; }
.brand-stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top: 32px; }
.stat-item {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 22px 18px; text-align: center;
    transition: background var(--transition), border-color var(--transition);
}
.stat-number {
    font-size: 1.9rem; font-weight: 800; color: var(--brand);
    line-height: 1.2; margin-bottom: 6px;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.brand-intro-visual {
    background: var(--bg-banner); border-radius: var(--radius);
    padding: 40px; display: flex; align-items: center; justify-content: center;
    min-height: 380px;
}
.brand-intro-visual svg { width: 100%; max-width: 360px; }

.culture-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.culture-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 32px 26px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.culture-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.culture-icon {
    width: 52px; height: 52px; border-radius: 14px;
    background: rgba(47,107,255,0.12); display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
}
body.dark .culture-icon { background: rgba(91,140,255,0.18); }
.culture-icon svg { width: 26px; height: 26px; }
.culture-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
.culture-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.8; }

.features-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.feature-card {
    display: flex; gap: 20px; background: var(--bg);
    border: 1px solid var(--border-light); border-radius: var(--radius);
    padding: 28px; transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.feature-num {
    flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
    background: var(--brand); color: #FFFFFF;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.05rem;
}
body.dark .feature-num { background: var(--brand); color: #0B0E14; }
.feature-card h3 { font-size: 1.08rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; }

.solutions-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.solution-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.solution-head {
    padding: 26px 24px 18px; border-bottom: 1px solid var(--border-light);
}
.solution-head h3 { font-size: 1.12rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.solution-head span { font-size: 0.82rem; color: var(--brand); font-weight: 600; }
.solution-body { padding: 20px 24px 26px; }
.solution-body ul { display: flex; flex-direction: column; gap: 10px; }
.solution-body li {
    font-size: 0.9rem; color: var(--text-muted); line-height: 1.7;
    padding-left: 20px; position: relative;
}
.solution-body li::before {
    content: "✓"; position: absolute; left: 0; top: 0;
    color: var(--brand); font-weight: 700;
}

.apps-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.app-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 28px 22px; text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.app-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.app-icon { margin: 0 auto 16px; width: 48px; height: 48px; }
.app-card h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.app-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

.cases-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.case-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 30px 26px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-tag {
    display: inline-block; font-size: 0.75rem; font-weight: 700;
    color: var(--brand); background: var(--bg-tag);
    padding: 4px 12px; border-radius: 12px; margin-bottom: 16px;
}
body.dark .case-tag { color: var(--brand-dark); background: var(--bg-tag); }
.case-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
.case-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.case-result { display: flex; gap: 20px; padding-top: 16px; border-top: 1px solid var(--border-light); }
.case-result div { flex: 1; }
.case-result .num { font-size: 1.3rem; font-weight: 800; color: var(--brand); line-height: 1.2; }
.case-result .lbl { font-size: 0.78rem; color: var(--text-light); }

.reviews-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.review-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 30px 26px; position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.review-stars { color: #F5A623; font-size: 1rem; margin-bottom: 14px; letter-spacing: 2px; }
.review-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.85; margin-bottom: 20px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
    width: 42px; height: 42px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.9rem; color: #FFFFFF;
    background: var(--brand); flex-shrink: 0;
}
body.dark .review-avatar { color: #0B0E14; }
.review-author .name { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); }
.review-author .role { font-size: 0.78rem; color: var(--text-light); }

.news-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.news-card {
    display: flex; gap: 22px; background: var(--bg);
    border: 1px solid var(--border-light); border-radius: var(--radius);
    padding: 26px; transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.news-date {
    flex-shrink: 0; width: 64px; text-align: center;
    background: var(--bg-tag); border-radius: var(--radius-sm); padding: 10px 6px;
}
body.dark .news-date { background: var(--bg-tag); }
.news-date .day { font-size: 1.4rem; font-weight: 800; color: var(--brand); line-height: 1.2; }
.news-date .month { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; }
.news-body h3 { font-size: 1.02rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; line-height: 1.5; }
.news-body p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 10px; }
.news-body .read-more { font-size: 0.85rem; font-weight: 600; color: var(--text-link); }
.news-body .read-more:hover { color: var(--text-link-hover); }

.articles-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.article-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 28px 26px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background var(--transition), border-color var(--transition);
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.article-meta { font-size: 0.78rem; color: var(--text-light); margin-bottom: 12px; display: flex; gap: 14px; flex-wrap: wrap; }
.article-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; line-height: 1.5; }
.article-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 14px; }
.article-card .read-link { font-size: 0.85rem; font-weight: 600; color: var(--text-link); }
.article-card .read-link:hover { color: var(--text-link-hover); }

.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); overflow: hidden;
    transition: background var(--transition), border-color var(--transition);
}
.faq-question {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 26px; cursor: pointer; gap: 16px;
    font-size: 1rem; font-weight: 700; color: var(--text-primary);
    transition: background var(--transition), color var(--transition);
    user-select: none;
}
.faq-question:hover { background: var(--bg-hover); }
.faq-question .faq-icon {
    flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%;
    background: var(--bg-tag); display: flex; align-items: center; justify-content: center;
    color: var(--brand); font-weight: 700; font-size: 1rem;
    transition: transform 0.3s ease, background var(--transition), color var(--transition);
}
.faq-item.open .faq-question .faq-icon { transform: rotate(45deg); background: var(--brand); color: #FFFFFF; }
body.dark .faq-item.open .faq-question .faq-icon { color: #0B0E14; }
.faq-answer {
    max-height: 0; overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 26px;
}
.faq-item.open .faq-answer { max-height: 600px; padding: 0 26px 22px; }
.faq-answer p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.9; }

.howto-wrap { max-width: 900px; margin: 0 auto; }
.howto-step {
    display: flex; gap: 22px; padding: 26px 0;
    border-bottom: 1px solid var(--border-light);
}
.howto-step:last-child { border-bottom: none; }
.howto-num {
    flex-shrink: 0; width: 48px; height: 48px; border-radius: 14px;
    background: var(--brand); color: #FFFFFF;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.1rem;
}
body.dark .howto-num { background: var(--brand); color: #0B0E14; }
.howto-content h3 { font-size: 1.08rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.howto-content p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.85; }
.howto-content ul { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.howto-content li {
    font-size: 0.88rem; color: var(--text-muted); line-height: 1.7;
    padding-left: 18px; position: relative;
}
.howto-content li::before {
    content: "•"; position: absolute; left: 4px; top: 0;
    color: var(--brand); font-weight: 700;
}

.notes-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.note-card {
    background: var(--bg); border: 1px solid var(--border-light);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius-sm); padding: 22px 24px;
    transition: background var(--transition), border-color var(--transition);
}
.note-card h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.note-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.8; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h3 { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); margin-bottom: 22px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 22px; }
.contact-icon {
    flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
    background: var(--bg-tag); display: flex; align-items: center; justify-content: center;
}
body.dark .contact-icon { background: var(--bg-tag); }
.contact-icon svg { width: 22px; height: 22px; }
.contact-item .label { font-size: 0.82rem; color: var(--text-light); margin-bottom: 2px; }
.contact-item .value { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
.contact-item .value a { color: var(--text-link); }
.contact-form {
    background: var(--bg); border: 1px solid var(--border-light);
    border-radius: var(--radius); padding: 32px 28px;
}
.contact-form h3 { font-size: 1.2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 20px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--bg-input);
    color: var(--text-primary); font-size: 0.92rem; outline: none;
    transition: border-color var(--transition), background var(--transition), color var(--transition);
    font-family: inherit;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-light); }
.form-group input:focus, .form-group textarea:focus { border-color: var(--brand); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-submit {
    width: 100%; padding: 13px; border-radius: var(--radius-sm);
    background: var(--brand); color: #FFFFFF; font-size: 0.95rem;
    font-weight: 700; border: none; cursor: pointer;
    transition: background var(--transition), color var(--transition), transform 0.2s ease;
}
.form-submit:hover { background: var(--brand-dark); color: #FFFFFF; transform: translateY(-1px); }
body.dark .form-submit { color: #0B0E14; }
body.dark .form-submit:hover { color: #0B0E14; }

.footer {
    background: var(--bg-footer); color: var(--text-on-dark);
    padding: 64px 0 28px;
    transition: background var(--transition), color var(--transition);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer-brand h3 { font-size: 1.2rem; font-weight: 800; color: #FFFFFF; margin-bottom: 14px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-on-dark-muted); line-height: 1.85; margin-bottom: 16px; }
.footer-brand .footer-contact { font-size: 0.85rem; color: var(--text-on-dark-muted); line-height: 2; }
.footer-brand .footer-contact strong { color: #FFFFFF; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #FFFFFF; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.86rem; color: var(--text-on-dark-muted); transition: color var(--transition); }
.footer-col a:hover { color: #FFFFFF; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 24px; display: flex; justify-content: space-between;
    align-items: center; flex-wrap: wrap; gap: 16px;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-on-dark-muted); }
.footer-bottom-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-bottom-links a { font-size: 0.82rem; color: var(--text-on-dark-muted); }
.footer-bottom-links a:hover { color: #FFFFFF; }

.back-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 999;
    width: 46px; height: 46px; border-radius: 50%;
    background: var(--brand); color: #FFFFFF;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; border: none;
    box-shadow: 0 6px 20px rgba(47,107,255,0.4);
    opacity: 0; visibility: hidden; transform: translateY(16px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background var(--transition), color var(--transition);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--brand-dark); color: #FFFFFF; }
body.dark .back-top { color: #0B0E14; }
body.dark .back-top:hover { color: #0B0E14; }
.back-top svg { width: 22px; height: 22px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.breadcrumb {
    max-width: 1200px; margin: 0 auto; padding: 16px 24px 0;
    font-size: 0.82rem; color: var(--text-light);
}
.breadcrumb a { color: var(--text-link); }
.breadcrumb a:hover { color: var(--text-link-hover); }
.breadcrumb span { margin: 0 8px; color: var(--text-light); }

@media (max-width: 1024px) {
    .brand-intro { grid-template-columns: 1fr; gap: 40px; }
    .culture-grid { grid-template-columns: repeat(2,1fr); }
    .solutions-grid { grid-template-columns: repeat(2,1fr); }
    .apps-grid { grid-template-columns: repeat(2,1fr); }
    .cases-grid { grid-template-columns: repeat(2,1fr); }
    .reviews-grid { grid-template-columns: repeat(2,1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed; top: 68px; left: 0; right: 0;
        background: var(--bg-card); flex-direction: column;
        padding: 16px 24px 24px; gap: 4px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%); opacity: 0; visibility: hidden;
        transition: transform 0.35s ease, opacity 0.35s ease, visibility 0.35s ease;
    }
    .nav-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-menu a { width: 100%; padding: 12px 14px; }
    .mobile-toggle { display: flex; }
    .banner h1 { font-size: 2rem; }
    .banner p { font-size: 0.95rem; }
    .section { padding: 56px 0; }
    .section-header h2 { font-size: 1.55rem; }
    .brand-stats { grid-template-columns: 1fr; }
    .culture-grid, .features-grid, .solutions-grid,
    .apps-grid, .cases-grid, .reviews-grid,
    .news-grid, .articles-grid, .notes-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .brand-intro-visual { min-height: 260px; padding: 26px; }
    .search-wrap.open .search-input { width: 140px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .banner h1 { font-size: 1.65rem; }
    .banner-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .stat-number { font-size: 1.5rem; }
    .back-top { bottom: 20px; right: 16px; }
}