/* ========================================
   CTJI 中科劲纬 — 企业官网主题样式
   视觉风格：深色科技 · 光电渐变 · 统一调性
   ======================================== */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-deeper: #0f3b8e;
    --primary-light: #60a5fa;
    --primary-glow: rgba(37, 99, 235, 0.25);
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --info: #06b6d4;
    --success: #10b981;
    --dark: #1e3a5f;
    --dark-surface: #2a4a7f;
    --dark-card: #3b6a9f;
    --dark-section: #ffffff;
    --dark-section-alt: #f8fafc;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-400: #64748b;
    --gray-500: #475569;
    --text-light: #1e293b;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 10px 30px -5px rgba(37,99,235,0.2);
    --shadow-xl: 0 20px 40px -8px rgba(37,99,235,0.25);
    --shadow-glow: 0 0 30px rgba(37,99,235,0.15);
    --radius: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --card-bg: #ffffff;
    --card-border: rgba(0,0,0,0.08);
    --section-gradient: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

html { scroll-behavior: smooth; font-size: 14px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-light);
    background: #ffffff;
    overflow-x: hidden;
    line-height: 1.7;
}

@media (min-width: 768px) { html { font-size: 16px; } }

::selection { background: var(--primary); color: #fff; }

/* ---- 通用 Section ---- */
.section-padding { padding: 5rem 0; }

.section-padding-alt {
    padding: 5rem 0;
    background: var(--dark-section-alt);
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--info));
    border-radius: 2px;
    margin: 0.75rem auto 0;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ---- 顶部公告 ---- */
.top-bar {
    background: #f8fafc;
    color: #374151;
    font-size: 0.85rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid #e5e7eb;
}

@media (max-width: 768px) {
    .top-bar-phone { display: none; }
    .top-bar-news { max-width: 100%; }
}

/* ---- 导航栏 ---- */
.navbar-dark {
    background: #ffffff !important;
    border-bottom: 1px solid #e5e7eb;
}

.navbar .navbar-brand {
    color: #1e293b !important;
}

.brand-title {
    font-weight: 700;
    font-size: 1.05rem;
    color: #1e293b;
}

.brand-sub {
    color: #64748b !important;
    font-size: 0.72rem !important;
}

.navbar .nav-link {
    font-size: 0.92rem;
    font-weight: 500;
    padding: 0.6rem 1rem !important;
    border-radius: 0.375rem;
    transition: var(--transition);
    position: relative;
    color: var(--text-light) !important;
}

.navbar .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: var(--transition);
    border-radius: 1px;
}

.navbar .nav-link:hover::after,
.navbar .nav-link.active::after { width: 70%; }

.navbar .nav-link:hover, .navbar .nav-link.active {
    color: var(--primary) !important;
}

/* ---- Hero ---- */
.hero-section {
    min-height: 88vh;
    background: #ffffff;
}

.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse at 15% 50%, rgba(37,99,235,0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 30%, rgba(99,102,241,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 85%, rgba(14,165,233,0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 15%, rgba(37,99,235,0.05) 0%, transparent 40%);
}

.hero-overlay {
    position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%232563eb' fill-opacity='0.04'%3E%3Cpath d='M50 50h-4v-4h4v4zm0-40h-4v-4h4v4zM10 50H6v-4h4v4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.6;
}



/* ---- 按钮 ---- */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-deeper));
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37,99,235,0.4);
    color: #fff;
}
.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    transition: var(--transition);
}
.btn-outline-primary:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: transparent;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}
.btn-outline-light {
    border: 2px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.8);
    transition: var(--transition);
}
.btn-outline-light:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.6);
    color: #fff;
    transform: translateY(-3px);
}

/* ---- 卡片通用 ---- */
.card, .service-card, .solution-card, .case-card, .testimonial-card {
    background: var(--card-bg) !important;
    border: 1px solid var(--card-border) !important;
    border-radius: var(--radius-xl) !important;
    backdrop-filter: blur(8px);
    transition: var(--transition);
    color: var(--text-light);
}

.service-card:hover, .solution-card:hover, .case-card:hover, .testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl) !important;
    border-color: var(--primary) !important;
    background: #f0f7ff !important;
}

.card-title, .card-text, .card-body {
    color: var(--text-light);
}

.card-text { color: var(--gray-500) !important; }

/* ---- 统计数据 ---- */
.stats-section {
    background: var(--section-gradient);
}
.stat-item .stat-icon { transition: var(--transition); }
.stat-item:hover .stat-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

/* ---- 页脚 ---- */
.footer {
    border-top: 1px solid rgba(0,0,0,0.06);
    background: #ffffff;
}

.footer-link {
    color: #475569;
    text-decoration: none;
    transition: var(--transition);
}
.footer-link:hover { color: var(--primary); padding-left: 4px; }

.footer .small {
    color: #475569;
}

/* ---- 浮动咨询 ---- */
.float-consult { position: fixed; bottom: 2rem; right: 2rem; z-index: 999; display: flex; flex-direction: column; gap: 0.5rem; }
.consult-item {
    width: 48px; height: 48px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; box-shadow: 0 4px 15px rgba(37,99,235,0.3);
    transition: var(--transition); text-decoration: none;
}
.consult-item:hover {
    transform: scale(1.1); color: #fff; box-shadow: 0 8px 25px rgba(37,99,235,0.5);
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
    .section-padding { padding: 3rem 0; }
    .hero-section { min-height: 60vh; }
    .hero-section h1 { font-size: 1.75rem; }
    .section-title { font-size: 1.5rem; }
    .float-consult { bottom: 1rem; right: 1rem; }
    .consult-item { width: 40px; height: 40px; font-size: 1rem; }
}

.text-purple { color: var(--accent) !important; }

@media print {
    .top-bar, .float-consult, .navbar { display: none !important; }
}

/* ---- 其他 ---- */
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
[data-aos] { pointer-events: none; }
[data-aos].aos-animate { pointer-events: auto; }
.article-content h4 { font-weight: 700; margin-top: 1.5rem; }
.article-content ul { padding-left: 1.25rem; }
.article-content ul li { margin-bottom: 0.5rem; line-height: 1.7; }



/* 每日工业动态 */
.news-row {
    border-left: 3px solid #2563eb;
    transition: background 0.15s ease;
}
.news-row:hover {
    background: #f1f5f9;
}