/* ===== LIKTIN - CATL Style ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0028AA;
    --primary-dark: #001A7A;
    --dark: #0B1437;
    --text: #1A1A1A;
    --text-2: #555;
    --text-3: #999;
    --bg: #FFFFFF;
    --bg-2: #F5F6F8;
    --border: #E5E7EB;
    --radius: 4px;
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text); background: var(--bg); font-size: 16px; line-height: 1.7;
    -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: all .3s ease; }
img { max-width: 100%; display: block; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ===== Navigation ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,.96); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo img { height: 40px; width: auto; }
.nav-right { display: flex; align-items: center; gap: 28px; }
.nav-menu { display: flex; list-style: none; gap: 28px; margin: 0; padding: 0; }
.nav-menu li { white-space: nowrap; }
.nav-menu a { font-size: 15px; font-weight: 400; color: var(--text); position: relative; padding: 6px 0; }
.nav-menu a:hover { color: var(--primary); }
.nav-menu a.active { color: var(--primary); font-weight: 500; }
.nav-menu a.active::after { content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px; background: var(--primary); }
.nav-cta { background: var(--primary); color: #fff !important; padding: 10px 22px; font-size: 14px; font-weight: 500; border-radius: var(--radius); white-space: nowrap; flex-shrink: 0; }
.nav-cta:hover { background: var(--primary-dark); }
.lang-switch { position: relative; flex-shrink: 0; }
.lang-btn { display: flex; align-items: center; gap: 5px; font-size: 13px; color: var(--text-2); cursor: pointer; padding: 7px 12px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; white-space: nowrap; }
.lang-btn:hover { border-color: var(--primary); color: var(--primary); }
.lang-dropdown { position: absolute; top: calc(100% + 8px); right: 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 8px 30px rgba(0,0,0,.1); min-width: 150px; opacity: 0; visibility: hidden; transform: translateY(-6px); transition: all .25s; z-index: 100; }
.lang-dropdown.show { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-dropdown a { display: block; padding: 11px 18px; font-size: 14px; color: var(--text-2); border-bottom: 1px solid var(--border); }
.lang-dropdown a:last-child { border-bottom: none; }
.lang-dropdown a:hover { color: var(--primary); background: var(--bg-2); }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; flex-shrink: 0; }
.mobile-toggle span { width: 22px; height: 2px; background: var(--text); }

/* ===== Hero ===== */
.hero { margin-top: 72px; position: relative; min-height: 560px; background: linear-gradient(135deg, #061033 0%, #0028AA 100%); overflow: hidden; display: flex; align-items: center; padding: 80px 0; }
.hero::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px); background-size: 60px 60px; }
.hero::after { content: ''; position: absolute; right: -15%; top: -30%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(255,255,255,.07) 0%, transparent 65%); border-radius: 50%; }
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero h1 { font-size: 46px; font-weight: 600; color: #fff; line-height: 1.3; margin-bottom: 24px; letter-spacing: 1px; }
.hero p { font-size: 18px; color: rgba(255,255,255,.8); line-height: 1.8; max-width: 640px; margin-bottom: 40px; font-weight: 300; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px; font-size: 15px; font-weight: 500; border-radius: var(--radius); cursor: pointer; border: none; transition: all .3s; white-space: nowrap; }
.btn-primary { background: #fff; color: var(--primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,.2); }
.btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); }
.btn-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; }

/* ===== Brands ===== */
.brands { padding: 44px 0; border-bottom: 1px solid var(--border); background: #fff; }
.brands-title { text-align: center; font-size: 14px; color: var(--text-3); letter-spacing: 3px; margin-bottom: 32px; font-weight: 400; }
.brands-grid { display: flex; justify-content: center; align-items: center; gap: 20px 40px; flex-wrap: wrap; max-width: 680px; margin: 0 auto; }
.brand-logo { height: 52px; width: auto; opacity: .85; /* color */ transition: all .3s; }
.brand-logo:hover { opacity: 1; filter: grayscale(0%); }

/* ===== Section Common ===== */
.section { padding: 90px 0; }
.section-gray { background: var(--bg-2); }
.section-dark { background: var(--dark); color: #fff; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag { display: block; font-size: 13px; color: var(--primary); letter-spacing: 3px; font-weight: 500; margin-bottom: 14px; }
.section-dark .section-tag { color: rgba(255,255,255,.55); }
.section-title { font-size: 34px; font-weight: 600; line-height: 1.3; margin-bottom: 14px; letter-spacing: .5px; }
.section-desc { font-size: 16px; color: var(--text-2); max-width: 640px; margin: 0 auto; line-height: 1.8; font-weight: 300; }
.section-dark .section-desc { color: rgba(255,255,255,.6); }

/* ===== About ===== */
.about-row { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.about-visual { display: flex; justify-content: center; }
.about-visual svg { width: 100%; max-width: 260px; }
.about-text .sub { font-size: 14px; color: var(--primary); font-weight: 500; margin-bottom: 14px; letter-spacing: 2px; }
.about-text h2 { font-size: 30px; font-weight: 600; line-height: 1.4; margin-bottom: 24px; }
.about-text p { font-size: 16px; color: var(--text-2); line-height: 1.9; margin-bottom: 14px; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.value-item { display: flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; }
.value-dot { width: 8px; height: 8px; background: var(--primary); border-radius: 50%; flex-shrink: 0; }

/* ===== Services Grid ===== */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.svc-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 36px 30px; transition: all .3s; position: relative; overflow: hidden; display: flex; flex-direction: column; }
.svc-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--primary); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.svc-card:hover { box-shadow: 0 12px 40px rgba(0,40,170,.08); transform: translateY(-4px); border-color: transparent; }
.svc-card:hover::before { transform: scaleX(1); }
.svc-icon { width: 42px; height: 42px; margin-bottom: 22px; flex-shrink: 0; }
.svc-icon svg { width: 100%; height: 100%; }
.svc-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.svc-card p { font-size: 15px; color: var(--text-2); line-height: 1.8; }

/* ===== Advantages (dark) ===== */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.adv-item { padding: 36px 32px; background: #fff; border: 1px solid var(--border); border-radius: 8px; transition: box-shadow .3s, border-color .3s; }
.adv-item:hover { box-shadow: 0 4px 20px rgba(0,40,170,.08); border-color: rgba(0,40,170,.2); }
.adv-icon { width: 38px; height: 38px; margin-bottom: 18px; color: var(--primary); }
.adv-icon svg { width: 100%; height: 100%; }
.adv-item h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; }
.adv-item p { font-size: 15px; color: var(--text-2); line-height: 1.8; }

/* ===== Cases ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card { background: #fff; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); transition: all .3s; display: flex; flex-direction: column; }
.case-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,.08); transform: translateY(-4px); }
.case-img { height: 140px; background: var(--bg-2); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.case-img svg { width: 40px; height: 40px; opacity: .3; }
.case-body { padding: 26px; flex: 1; display: flex; flex-direction: column; }
.case-tag { display: inline-block; font-size: 12px; font-weight: 500; color: var(--primary); background: rgba(0,40,170,.06); padding: 4px 12px; border-radius: 3px; margin-bottom: 12px; align-self: flex-start; }
.case-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.case-body p { font-size: 14px; color: var(--text-2); line-height: 1.75; flex: 1; }
.case-meta { display: flex; gap: 16px; margin-top: 14px; font-size: 13px; color: var(--text-3); }

/* ===== News ===== */
.news-empty { text-align: center; padding: 100px 0; color: var(--text-3); font-size: 16px; }

/* ===== CTA ===== */
.cta { background: linear-gradient(135deg, #061033, #0028AA); color: #fff; padding: 72px 0; text-align: center; position: relative; overflow: hidden; }
.cta::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px); background-size: 60px 60px; }
.cta .container { position: relative; z-index: 2; }
.cta h2 { font-size: 32px; font-weight: 600; margin-bottom: 14px; }
.cta p { font-size: 16px; opacity: .75; margin-bottom: 32px; font-weight: 300; }
.cta .hero-btns { justify-content: center; }

/* ===== Footer ===== */
.footer { background: #080F2E; color: rgba(255,255,255,.6); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 44px; padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand img { height: 38px; width: auto; margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-bottom: 18px; max-width: 320px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 36px; height: 36px; background: rgba(255,255,255,.06); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; transition: all .3s; }
.footer-social a:hover { background: var(--primary); }
.footer h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.55); }
.footer-links a:hover { color: #fff; }
.footer-contact { list-style: none; }
.footer-contact li { font-size: 14px; margin-bottom: 12px; display: flex; gap: 10px; line-height: 1.7; }
.footer-bottom { padding: 22px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,.35); }

/* ===== Page Header ===== */
.page-header { margin-top: 72px; padding: 72px 0; background: linear-gradient(135deg, #061033, #0028AA); color: #fff; text-align: center; position: relative; overflow: hidden; }
.page-header::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px); background-size: 60px 60px; }
.page-header .container { position: relative; z-index: 2; }
.page-header h1 { font-size: 38px; font-weight: 600; letter-spacing: 1px; }
.page-header p { font-size: 16px; opacity: .7; margin-top: 10px; font-weight: 300; }

/* ===== Service Detail ===== */
.svc-detail { margin-bottom: 72px; }
.svc-detail:last-child { margin-bottom: 0; }
.svc-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.svc-detail-visual { display: flex; justify-content: center; }
.svc-detail-visual svg { width: 100%; max-width: 220px; }
.svc-detail-text h2 { font-size: 25px; font-weight: 600; margin-bottom: 16px; }
.svc-detail-text p { font-size: 15px; color: var(--text-2); line-height: 1.9; margin-bottom: 12px; }
.svc-detail-text ul { list-style: none; margin-top: 18px; }
.svc-detail-text li { font-size: 15px; color: var(--text-2); padding: 7px 0 7px 22px; position: relative; line-height: 1.7; }
.svc-detail-text li::before { content: ''; position: absolute; left: 0; top: 15px; width: 7px; height: 7px; background: var(--primary); border-radius: 50%; }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 28px; }
.contact-info { background: var(--dark); color: #fff; padding: 44px 36px; border-radius: 8px; }
.contact-info h3 { font-size: 21px; font-weight: 600; margin-bottom: 28px; }
.ci-item { display: flex; gap: 14px; margin-bottom: 24px; }
.ci-icon { width: 42px; height: 42px; background: rgba(255,255,255,.08); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.ci-item h4 { font-size: 13px; opacity: .5; margin-bottom: 4px; font-weight: 400; }
.ci-item p { font-size: 15px; font-weight: 500; line-height: 1.7; }
.contact-form { background: #fff; padding: 44px 36px; border-radius: 8px; border: 1px solid var(--border); }
.contact-form h3 { font-size: 21px; font-weight: 600; margin-bottom: 6px; }
.contact-form > p { font-size: 14px; color: var(--text-2); margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 7px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 15px; font-family: inherit; background: var(--bg-2); transition: all .25s; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(0,40,170,.08); }
.form-group textarea { resize: vertical; min-height: 110px; }
.btn-submit { width: 100%; padding: 13px; font-size: 16px; font-weight: 600; background: var(--primary); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; transition: all .3s; }
.btn-submit:hover { background: var(--primary-dark); }
.map-box { margin-top: 28px; height: 300px; background: var(--bg-2); border-radius: 8px; border: 1px dashed var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-3); font-size: 15px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .nav-right { gap: 20px; }
    .nav-menu { gap: 20px; }
    .nav-menu a { font-size: 14px; }
    .hero h1 { font-size: 36px; }
    .about-row, .svc-detail-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
    .svc-grid, .case-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 820px) {
    .nav-menu { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,.06); }
    .nav-menu.active { display: flex; }
    .nav-menu li { width: 100%; }
    .mobile-toggle { display: flex; }
    .nav-right { gap: 12px; }
    .nav-cta { display: none; }
    .lang-btn { padding: 6px 10px; font-size: 12px; }
}
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .hero { min-height: auto; padding: 64px 0; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; }
    .section { padding: 56px 0; }
    .section-title { font-size: 24px; }
    .section-desc { font-size: 15px; }
    .svc-grid, .case-grid, .adv-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .form-row { grid-template-columns: 1fr; }
    .page-header { padding: 48px 0; }
    .page-header h1 { font-size: 26px; }
    .cta { padding: 56px 0; }
    .cta h2 { font-size: 22px; }
    .brand-logo { height: 36px; }
    .brands-grid { gap: 14px 24px; }
    .about-values { grid-template-columns: 1fr; }
    .about-text h2 { font-size: 22px; }
    .contact-info, .contact-form { padding: 28px 22px; }
    .svc-detail-grid { gap: 32px; }
}