/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #1E5AAF;
    --primary-dark: #15408A;
    --primary-light: #3B7DD8;
    --green: #10B981;
    --green-light: #34D399;
    --amber: #F59E0B;
    --white: #FFFFFF;
    --bg: #F9F9FB;
    --bg-alt: #F3F6FA;
    --bg-light: #F9F9FB;
    --bg-card: #FFFFFF;
    --text: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: #E5E7EB;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 16px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

:focus-visible {
    outline: 3px solid rgba(30, 90, 175, 0.35);
    outline-offset: 3px;
}

.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;
}

/* ===== Header ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    height: 72px;
}

.header.scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; background: var(--primary);
    color: var(--white); border-radius: var(--radius);
    font-size: 18px; font-weight: 700;
    flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; }
.logo-name { font-size: 18px; font-weight: 700; color: var(--text); letter-spacing: 0.5px; }
.logo-sub { font-size: 10px; color: var(--text-muted); letter-spacing: 1.5px; font-weight: 500; }

.nav { display: flex; gap: 8px; align-items: center; }
.nav-link {
    font-size: 14px; font-weight: 500; color: var(--text-secondary);
    padding: 8px 16px; border-radius: var(--radius);
    transition: var(--transition); white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: rgba(30,90,175,0.06); }
.nav-link.active { color: var(--primary); background: rgba(30,90,175,0.1); font-weight: 600; }

.nav-cta {
    margin-left: 8px;
    padding: 10px 22px; background: var(--primary); color: var(--white);
    border-radius: var(--radius); font-size: 14px; font-weight: 600;
    transition: var(--transition); white-space: nowrap;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-sm); }

.menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-btn span { display: block; width: 24px; height: 2px; background: var(--text); transition: var(--transition); border-radius: 1px; }

/* ===== Page Banner (sub-pages) ===== */
.page-banner {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center; position: relative; overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute; top: -30%; right: -15%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(16,185,129,0.12) 0%, transparent 70%);
    border-radius: 50%;
}
.page-banner-title {
    font-size: 40px; font-weight: 800; color: var(--white);
    letter-spacing: 1px; margin-bottom: 12px; position: relative;
}
.page-banner-subtitle {
    font-size: 16px; color: rgba(255,255,255,0.7);
    font-weight: 400; position: relative;
}

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center;
    background: linear-gradient(135deg, #F0F4FB 0%, #E8EFF8 30%, #F5F7FA 100%);
    overflow: hidden; padding: 100px 0 80px;
}

.hero-pattern {
    position: absolute; inset: 0; opacity: 0.03;
    background-image: radial-gradient(circle, var(--primary) 1px, transparent 1px);
    background-size: 24px 24px;
}

.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 16px; background: rgba(30,90,175,0.08);
    color: var(--primary); border-radius: 24px;
    font-size: 13px; font-weight: 600; margin-bottom: 24px;
}
.hero-badge-dot {
    width: 8px; height: 8px; background: var(--green);
    border-radius: 50%; animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: 48px; font-weight: 800; color: var(--text);
    letter-spacing: 0.5px; margin-bottom: 20px; line-height: 1.25;
}
.hero-title span { color: var(--primary); }
.hero-subtitle {
    font-size: 17px; color: var(--text-secondary); margin-bottom: 36px;
    line-height: 1.8; max-width: 520px;
}

.hero-visual {
    position: relative; display: flex; justify-content: center; align-items: center;
}

.hero-visual-main {
    width: 100%; max-width: 480px; height: 360px;
    background: linear-gradient(135deg, var(--primary) 0%, #2B6DC8 40%, #4A90D9 100%);
    border-radius: var(--radius-xl);
    display: flex; align-items: center; justify-content: center;
    position: relative; z-index: 1;
    box-shadow: 0 24px 64px rgba(30,90,175,0.2);
}
.hero-visual-main::after {
    content: ''; position: absolute; inset: 8px;
    border: 2px solid rgba(255,255,255,0.15); border-radius: var(--radius);
    pointer-events: none;
}
.hero-visual-icon {
    font-size: 80px; opacity: 0.6; color: var(--white);
}

.hero-visual-float {
    position: absolute; z-index: 2;
    padding: 14px 18px; background: var(--white);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
    display: flex; align-items: center; gap: 12px;
}
.hero-visual-float.top-right { top: 20px; right: 10px; }
.hero-visual-float.bottom-left { bottom: 30px; left: 0; }
.float-icon {
    width: 40px; height: 40px; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; flex-shrink: 0;
}
.float-icon.green { background: #D1FAE5; color: var(--green); }
.float-icon.amber { background: #FEF3C7; color: var(--amber); }
.float-text .float-label { font-size: 11px; color: var(--text-muted); font-weight: 500; }
.float-text .float-value { font-size: 16px; font-weight: 700; color: var(--text); }

/* ===== Section Common ===== */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-light); }

.section-header { text-align: center; margin-bottom: 56px; }
.section-label {
    display: inline-block; padding: 5px 14px; background: rgba(30,90,175,0.08);
    color: var(--primary); border-radius: 20px;
    font-size: 13px; font-weight: 600; letter-spacing: 1px;
    text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
    font-size: 36px; font-weight: 800; color: var(--text);
    margin-bottom: 12px; letter-spacing: 0.5px;
}
.section-title span { color: var(--primary); }
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ===== Stats Bar ===== */
.stats-bar {
    padding: 48px 0; background: var(--white);
    border-bottom: 1px solid var(--border);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-icon {
    font-size: 28px; margin-bottom: 12px; display: block;
}
.stat-number {
    font-size: 36px; font-weight: 800; color: var(--primary);
    line-height: 1.2; margin-bottom: 6px;
}
.stat-label { font-size: 14px; color: var(--text-secondary); font-weight: 500; }

/* ===== Products ===== */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    overflow: hidden; box-shadow: var(--shadow);
    transition: var(--transition); border: 1px solid var(--border);
}
.product-card:hover {
    transform: translateY(-6px); box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.product-card-img {
    height: 200px; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.product-card-img .bg-gradient-blue {
    background: linear-gradient(135deg, #EBF3FC, #D6E6FA);
    position: absolute; inset: 0;
}
.product-card-img .bg-gradient-green {
    background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
    position: absolute; inset: 0;
}
.product-card-img .bg-gradient-amber {
    background: linear-gradient(135deg, #FFFBEB, #FEF3C7);
    position: absolute; inset: 0;
}
.product-card-img .bg-gradient-purple {
    background: linear-gradient(135deg, #F5F0FF, #EDE4FC);
    position: absolute; inset: 0;
}
.product-card-img-icon {
    font-size: 64px; position: relative; z-index: 1; opacity: 0.5;
}
.product-card-body { padding: 22px; }
.product-card-body h3 {
    font-size: 18px; font-weight: 700; color: var(--text);
    margin-bottom: 8px;
}
.product-card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.product-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.product-tag {
    padding: 4px 10px; border-radius: 4px; font-size: 11px; font-weight: 600;
    letter-spacing: 0.5px;
}
.product-tag.blue { background: rgba(30,90,175,0.1); color: var(--primary); }
.product-tag.green { background: rgba(16,185,129,0.1); color: #059669; }
.product-tag.amber { background: rgba(245,158,11,0.1); color: #D97706; }

/* ===== Advantages ===== */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    padding: 32px 28px; text-align: center;
    box-shadow: var(--shadow); border: 1px solid var(--border);
    transition: var(--transition);
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.adv-card-icon {
    width: 56px; height: 56px; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 18px; font-size: 26px;
}
.adv-card-icon.blue { background: #EEF3FC; color: var(--primary); }
.adv-card-icon.green { background: #ECFDF5; color: var(--green); }
.adv-card-icon.amber { background: #FFFBEB; color: var(--amber); }
.adv-card h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.adv-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Cases ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    overflow: hidden; box-shadow: var(--shadow);
    transition: var(--transition); border: 1px solid var(--border);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card-img {
    height: 200px; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.case-card-img .bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, #E8EDF2, #DCE3EB);
}
.case-card-img-icon { font-size: 56px; position: relative; z-index: 1; opacity: 0.35; }
.case-card-body { padding: 22px; }
.case-tag {
    display: inline-block; padding: 4px 12px; border-radius: 4px;
    font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
    margin-bottom: 10px;
}
.case-tag.blue { background: rgba(30,90,175,0.08); color: var(--primary); }
.case-tag.green { background: rgba(16,185,129,0.08); color: #059669; }
.case-tag.amber { background: rgba(245,158,11,0.08); color: #D97706; }
.case-card-body h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.case-card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ===== Process ===== */
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.process-grid::before {
    content: ''; position: absolute; top: 36px; left: 16%; right: 16%;
    height: 2px; background: var(--border); z-index: 0;
}
.process-step { text-align: center; position: relative; z-index: 1; }
.process-step-num {
    width: 72px; height: 72px; border-radius: 50%;
    background: var(--white); border: 3px solid var(--primary);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 26px; font-weight: 800; color: var(--primary);
    transition: var(--transition);
}
.process-step:hover .process-step-num {
    background: var(--primary); color: var(--white);
    transform: scale(1.1);
}
.process-step h3 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.process-step p { font-size: 13px; color: var(--text-secondary); }

/* ===== News ===== */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--border);
    transition: var(--transition);
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.news-card-date {
    display: inline-block; padding: 4px 12px;
    background: rgba(30,90,175,0.08); color: var(--primary);
    border-radius: 4px; font-size: 12px; font-weight: 600;
    margin-bottom: 14px;
}
.news-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.news-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Support ===== */
.support-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.support-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    padding: 36px 28px; text-align: center;
    box-shadow: var(--shadow); border: 1px solid var(--border);
    transition: var(--transition);
}
.support-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.support-card-icon {
    width: 64px; height: 64px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px; font-size: 30px;
}
.support-card-icon.blue { background: #EEF3FC; color: var(--primary); }
.support-card-icon.green { background: #ECFDF5; color: var(--green); }
.support-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.support-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== About page ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-image {
    height: 420px; border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #E8EDF2 0%, #D4DCE8 100%);
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.about-image-icon { font-size: 100px; opacity: 0.3; color: var(--primary); }
.about-image-badge {
    position: absolute; bottom: 30px; right: 30px;
    padding: 16px 24px; background: var(--white);
    border-radius: var(--radius); box-shadow: var(--shadow-lg);
    text-align: center;
}
.about-image-badge .badge-num { font-size: 28px; font-weight: 800; color: var(--primary); display: block; }
.about-image-badge .badge-label { font-size: 12px; color: var(--text-secondary); }

.about-content h2 { font-size: 32px; font-weight: 800; color: var(--text); margin-bottom: 20px; }
.about-content h2 span { color: var(--primary); }
.about-content .lead {
    font-size: 16px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 24px;
}
.about-content p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }

/* Timeline */
.timeline { padding: 32px 0; }
.timeline-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.timeline-grid::before {
    content: ''; position: absolute; top: 18px; left: 10%; right: 10%;
    height: 2px; background: var(--border);
}
.timeline-item { text-align: center; position: relative; z-index: 1; padding: 0 12px; }
.timeline-dot {
    width: 38px; height: 38px; border-radius: 50%;
    background: var(--primary); border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--primary);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px;
    color: var(--white); font-size: 13px; font-weight: 700;
}
.timeline-year { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.timeline-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

/* ===== Contact page ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info-card {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.contact-info-item { display: flex; gap: 16px; padding: 18px 0; }
.contact-info-item + .contact-info-item { border-top: 1px solid var(--border); }
.contact-info-icon {
    width: 44px; height: 44px; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: 20px;
}
.contact-info-icon.blue { background: #EEF3FC; color: var(--primary); }
.contact-info-icon.green { background: #ECFDF5; color: var(--green); }
.contact-info-item h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.contact-info-item p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; }

.contact-form-wrap {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.contact-form-wrap h3 { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 24px; }

.contact-form input, .contact-form textarea, .contact-form select {
    width: 100%; padding: 14px 16px; margin-bottom: 14px;
    border: 1px solid var(--border); border-radius: var(--radius);
    font-size: 15px; font-family: inherit; transition: var(--transition);
    background: var(--white); color: var(--text);
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30,90,175,0.08);
}
.contact-form textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row input, .form-row select { margin-bottom: 14px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 32px; border-radius: var(--radius);
    font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition);
    border: 2px solid transparent; font-family: inherit; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(30,90,175,0.25); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(30,90,175,0.06); transform: translateY(-2px); }
.btn-white { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.btn-light { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.35); }
.btn-light:hover { background: rgba(255,255,255,0.1); border-color: var(--white); transform: translateY(-2px); }
.btn-full { width: 100%; text-align: center; justify-content: center; }

.hero-btns { display: flex; gap: 14px; }

/* ===== Footer ===== */
.footer {
    background: #111827; color: rgba(255,255,255,0.6); padding: 64px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 16px; max-width: 280px; }
.footer .logo-name { color: var(--white); }
.footer .logo-sub { color: rgba(255,255,255,0.35); }
.footer .logo-icon { background: var(--primary-light); }
.footer h4 { color: var(--white); font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.45); transition: var(--transition); }
.footer-links a:hover { color: var(--white); }
.footer-contact p { font-size: 14px; margin-bottom: 10px; line-height: 1.6; }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    padding: 24px 0; border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 13px; color: rgba(255,255,255,0.3);
}
.footer-bottom a { color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-bottom a:hover { color: var(--white); }

/* ===== Mobile Nav ===== */
.mobile-nav {
    display: none; position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    background: var(--white); z-index: 999; padding: 24px;
    flex-direction: column; gap: 12px; overflow-y: auto;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
    display: block; padding: 14px 16px; border-radius: var(--radius);
    font-size: 16px; font-weight: 500; color: var(--text);
    transition: var(--transition); border: 1px solid transparent;
}
.mobile-nav a:hover, .mobile-nav a.active {
    background: rgba(30,90,175,0.06); color: var(--primary);
}
.mobile-nav-cta {
    margin-top: 12px; padding: 14px 24px; background: var(--primary);
    color: var(--white) !important; border-radius: var(--radius);
    text-align: center; font-weight: 600; font-size: 16px;
}
.mobile-lang-toggle {
    display: flex; align-items: center; justify-content: center; gap: 4px;
    width: 100%; padding: 14px 16px; margin-top: 4px;
    border: 1px solid var(--border); border-radius: var(--radius);
    background: var(--white); color: var(--text); cursor: pointer;
    font: inherit; font-size: 16px; font-weight: 600;
}
.mobile-lang-toggle .lang-cn,
.mobile-lang-toggle .lang-en { color: var(--text-muted); }
.mobile-lang-toggle .lang-cn.active,
.mobile-lang-toggle .lang-en.active { color: var(--primary); }
.mobile-lang-toggle .lang-sep { color: var(--text-muted); }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed; bottom: 32px; right: 32px; z-index: 900;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: var(--white); border: none;
    font-size: 20px; cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(20px);
    box-shadow: 0 4px 16px rgba(30,90,175,0.3);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ===== Animations ===== */
.reveal {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-btns { justify-content: center; }
    .hero-visual-main { height: 280px; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .support-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .process-grid::before { display: none; }
    .timeline-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
    .nav, .nav-cta { display: none; }
    .menu-btn { display: flex; }

    .page-banner { padding: 120px 0 48px; }
    .page-banner-title { font-size: 28px; }

    .hero { padding: 80px 0 60px; min-height: auto; }
    .hero-title { font-size: 30px; }
    .hero-subtitle { font-size: 15px; }
    .hero-visual-main { height: 200px; }
    .hero-visual-float { display: none; }

    .section-title { font-size: 26px; }
    .product-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .adv-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .stat-number { font-size: 28px; }
    .about-image { height: 280px; }
    .news-grid { grid-template-columns: 1fr; }
    .support-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .hero-btns { flex-direction: column; align-items: center; }
    .hero-btns .btn { width: 200px; justify-content: center; }
    .timeline-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
    .timeline-grid::before { display: none; }
    .btn { padding: 12px 24px; font-size: 14px; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .hero-title { font-size: 26px; }
}

/* ===== Header Right (Lang Toggle) ===== */
.header-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
    display: flex; align-items: center; gap: 2px;
    padding: 6px 10px; border: 1px solid var(--border);
    border-radius: var(--radius); background: var(--white);
    cursor: pointer; font-size: 13px; font-weight: 600;
    transition: var(--transition); font-family: inherit;
}
.lang-toggle:hover { border-color: var(--primary); }
.lang-toggle .lang-cn { color: var(--primary); }
.lang-toggle .lang-en { color: var(--text-muted); }
.lang-toggle .lang-sep { color: var(--text-muted); font-weight: 400; }
.lang-toggle .lang-cn.active { color: var(--primary); }
.lang-toggle .lang-en.active { color: var(--primary); }
.lang-toggle .lang-cn:not(.active) { color: var(--text-muted); }
.lang-toggle .lang-en:not(.active) { color: var(--text-muted); }

/* ===== Technical Specs Table ===== */
.specs-table-wrap {
    overflow-x: auto; border-radius: var(--radius-lg);
    box-shadow: var(--shadow); border: 1px solid var(--border);
    background: var(--white);
}
.specs-table {
    width: 100%; border-collapse: collapse; min-width: 680px;
}
.specs-table thead tr { background: var(--primary); }
.specs-table th {
    padding: 16px 20px; text-align: left;
    color: var(--white); font-size: 14px; font-weight: 600;
    white-space: nowrap;
}
.specs-table tbody tr { border-bottom: 1px solid var(--border); transition: var(--transition); }
.specs-table tbody tr:hover { background: rgba(30,90,175,0.03); }
.specs-table tbody tr:last-child { border-bottom: none; }
.specs-table td {
    padding: 14px 20px; font-size: 14px; color: var(--text);
    line-height: 1.6;
}
.specs-table td.spec-name { font-weight: 600; color: var(--primary); }
.specs-table td:nth-child(2) { font-weight: 500; }
.specs-table td:nth-child(3) { color: var(--text-secondary); font-size: 13px; }
.specs-table td:nth-child(4) { color: var(--text-secondary); font-size: 13px; }

.specs-note {
    display: flex; gap: 16px; align-items: flex-start;
    margin-top: 24px; padding: 20px 24px;
    background: rgba(30,90,175,0.04); border-radius: var(--radius-lg);
    border-left: 3px solid var(--primary);
}
.specs-note-icon { font-size: 24px; flex-shrink: 0; }
.specs-note p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.specs-note a { color: var(--primary); font-weight: 600; }

/* ===== Enhanced Case Cards ===== */
.case-filter {
    display: flex; justify-content: center; gap: 8px; margin-bottom: 40px;
}
.case-filter-btn {
    padding: 10px 24px; border: 1px solid var(--border);
    border-radius: 24px; background: var(--white);
    font-size: 14px; font-weight: 500; color: var(--text-secondary);
    cursor: pointer; transition: var(--transition); font-family: inherit;
}
.case-filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.case-filter-btn.active {
    background: var(--primary); color: var(--white);
    border-color: var(--primary);
}

.case-card .case-location {
    position: absolute; bottom: 12px; left: 12px; z-index: 2;
    padding: 4px 12px; background: rgba(255,255,255,0.95);
    border-radius: var(--radius); font-size: 12px; font-weight: 500;
    color: var(--text-secondary); box-shadow: var(--shadow-sm);
}
.case-card .case-year {
    position: absolute; bottom: 12px; right: 12px; z-index: 2;
    padding: 4px 10px; background: var(--primary);
    border-radius: var(--radius); font-size: 11px; font-weight: 600;
    color: var(--white); box-shadow: var(--shadow-sm);
}
.case-card-tags { display: flex; gap: 6px; align-items: center; margin-bottom: 10px; }
.case-region {
    padding: 3px 10px; border-radius: 4px;
    font-size: 11px; font-weight: 600;
}
.case-region.domestic { background: rgba(16,185,129,0.1); color: #059669; }
.case-region.overseas { background: rgba(245,158,11,0.1); color: #D97706; }

.case-details {
    list-style: none; margin-top: 12px;
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.case-details li {
    font-size: 13px; color: var(--text-secondary);
    display: flex; flex-direction: column; gap: 2px;
}
.case-details li span {
    font-size: 11px; color: var(--text-muted); font-weight: 500;
}
.case-details li { font-weight: 500; color: var(--text); }

.case-card.hidden { display: none; }

/* ===== Certifications ===== */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-card {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 32px 24px; text-align: center;
    box-shadow: var(--shadow); border: 1px solid var(--border);
    transition: var(--transition);
}
.cert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.cert-badge {
    width: 64px; height: 64px; margin: 0 auto 20px;
    border-radius: 50%; background: linear-gradient(135deg, #EEF3FC, #D6E6FA);
    display: flex; align-items: center; justify-content: center;
    font-size: 30px;
}
.cert-card h3 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 10px; line-height: 1.4; }
.cert-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.cert-year {
    display: inline-block; padding: 3px 10px;
    background: rgba(30,90,175,0.08); color: var(--primary);
    border-radius: 4px; font-size: 11px; font-weight: 600;
}

/* ===== FAQ Accordion ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 12px; overflow: hidden; transition: var(--transition);
    background: var(--white);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
    width: 100%; padding: 20px 24px; text-align: left;
    background: none; border: none; cursor: pointer;
    font-size: 16px; font-weight: 600; color: var(--text);
    display: flex; justify-content: space-between; align-items: center;
    gap: 16px; font-family: inherit; transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
    width: 28px; height: 28px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; background: rgba(30,90,175,0.08);
    color: var(--primary); font-size: 18px; font-weight: 400;
    transition: var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: var(--white); }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
}
.faq-answer p {
    padding: 0 24px 20px; font-size: 14px; color: var(--text-secondary);
    line-height: 1.8;
}
.faq-answer a { color: var(--primary); font-weight: 600; }

/* ===== Form Note ===== */
.form-note {
    margin-top: 14px; font-size: 13px; color: var(--green);
    text-align: center;
}
.form-status {
    min-height: 1.5em;
    margin-top: 10px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
}
.form-status.success {
    color: var(--green);
    font-size: 15px;
}
.form-status.sending {
    color: var(--amber);
}

/* ===== Floating Contact Bar ===== */
.float-contact-bar {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 900;
    display: none; background: var(--white);
    box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
    border-top: 1px solid var(--border);
}
.float-contact-item {
    flex: 1; display: flex; align-items: center; justify-content: center;
    gap: 8px; padding: 14px; font-size: 15px; font-weight: 600;
    text-decoration: none; transition: var(--transition);
}
.float-contact-item.float-phone { color: var(--white); background: var(--primary); }
.float-contact-item.float-phone:hover { background: var(--primary-dark); }
.float-contact-item.float-message { color: var(--primary); background: rgba(30,90,175,0.06); }
.float-contact-item.float-message:hover { background: rgba(30,90,175,0.12); }
.float-contact-icon { font-size: 18px; }

/* ===== Hero Carousel ===== */
.hero-carousel {
    position: relative;
    width: 100%; height: 100%;
    overflow: hidden;
    border-radius: var(--radius-xl);
}
.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    z-index: 1;
}
.hero-slide.active {
    opacity: 1;
    z-index: 2;
}
.hero-slide img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.hero-carousel-dots {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}
.hero-carousel-dots .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}
.hero-carousel-dots .dot:focus-visible { outline-color: var(--white); }
.hero-carousel-dots .dot.active {
    width: 24px;
    border-radius: 4px;
    background: rgba(255,255,255,0.95);
}

/* ===== Image fills (real photos replacing gradient placeholders) ===== */
.hero-visual-main {
    background: var(--primary) !important;  /* fallback */
    overflow: hidden;
    padding: 0;
}
.hero-visual-main img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    border-radius: calc(var(--radius-xl) - 0px);
}
.hero-visual-main::after { display: none; }  /* hide the inner border */
.hero-visual-main .hero-visual-icon { display: none; }

.product-card-img {
    background: var(--bg-alt) !important;  /* fallback */
    overflow: hidden;
    padding: 0;
}
.product-card-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-img .bg-gradient-blue,
.product-card-img .bg-gradient-green,
.product-card-img .bg-gradient-amber,
.product-card-img .bg-gradient-purple { display: none; }
.product-card-img .product-card-img-icon { display: none; }
.product-card-img .product-card-img-tag {
    position: absolute; top: 14px; left: 14px;
    z-index: 2;
    background: rgba(255,255,255,0.95);
    color: var(--primary);
    font-size: 12px; font-weight: 700;
    padding: 5px 12px; border-radius: 20px;
    backdrop-filter: blur(8px);
}

.case-card-img {
    background: var(--bg-alt) !important;  /* fallback */
    overflow: hidden;
    padding: 0;
}
.case-card-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
.case-card:hover .case-card-img img { transform: scale(1.05); }
.case-card-img .bg { display: none; }
.case-card-img .case-card-img-icon { display: none; }

.about-image {
    background: var(--bg-alt) !important;  /* fallback */
    overflow: hidden;
    padding: 0;
    min-height: 380px;
    position: relative;
}
.about-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.about-image .about-image-icon { display: none; }
.about-image .about-image-badge {
    position: absolute;
    bottom: 24px; right: 24px;
    z-index: 2;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(8px);
    padding: 14px 22px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

/* ===== Design Gallery (12-style portfolio) ===== */
.gallery-section { background: var(--bg); padding: 80px 0; }
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--bg-alt);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}
.gallery-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0) 60%);
    display: flex; align-items: flex-end;
    padding: 18px;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-info { color: #fff; }
.gallery-item-title {
    font-size: 15px; font-weight: 700; margin-bottom: 4px;
    color: #fff;
}
.gallery-item-meta {
    font-size: 12px; opacity: 0.85; color: #fff;
}
.gallery-item-tag {
    position: absolute;
    top: 12px; left: 12px;
    z-index: 2;
    background: rgba(30,90,175,0.92);
    color: #fff;
    font-size: 11px; font-weight: 600;
    padding: 4px 10px; border-radius: 12px;
    backdrop-filter: blur(6px);
}

/* Stats bar with factory bg */
.stats-bar {
    position: relative;
    background: var(--primary) !important;
    overflow: hidden;
}
.stats-bar::before {
    content: '';
    position: absolute; inset: 0;
    background-image: url('../images/factory-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.18;
    filter: grayscale(0.4);
}
.stats-bar .container { position: relative; z-index: 1; }
.stats-bar .stat-item { color: #fff !important; }
.stats-bar .stat-icon { color: rgba(255,255,255,0.92) !important; }
.stats-bar .stat-number { color: #fff !important; }
.stats-bar .stat-label { color: rgba(255,255,255,0.85) !important; }

/* ===== Responsive Additions ===== */
@media (max-width: 1024px) {
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .case-details { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .header-right { display: none; }
    .lang-toggle { display: none; }
    .cert-grid { grid-template-columns: 1fr; }
    .case-filter { flex-wrap: wrap; }
    .float-contact-bar { display: flex; }
    .back-to-top { bottom: 72px; }
    .faq-question { font-size: 15px; padding: 18px 20px; }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .gallery-item-overlay { opacity: 1; }
}

@media (max-width: 480px) {
    .case-filter-btn { padding: 8px 16px; font-size: 13px; }
    .specs-table th, .specs-table td { padding: 10px 12px; font-size: 13px; }
    .gallery-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}