/**
 * AI搜索增长实验室 - 全站样式
 * 浅色AI科技感配色体系
 */

:root {
    --lab-primary: #3B9EFF;
    --lab-accent: #00D4FF;
    --lab-dark: #1A1A2E;
    --lab-card: #FFFFFF;
    --lab-card-hover: #E8F0FE;
    --lab-light: #F0F4FA;
    --lab-page-bg: #F0F4FA;
    --lab-section-alt: #E6EEF8;
    --lab-gold: #FFB84D;
    --lab-red: #FF4D6A;
    --lab-white: #FFFFFF;
    --lab-text: #1A1A2E;
    --lab-text-secondary: #5A6B80;
    --lab-gray: #8892A7;
    --lab-gray-light: #B8C1D0;
    --lab-border: rgba(59,158,255,0.12);
    --lab-border-hover: rgba(59,158,255,0.25);
    --lab-gradient: linear-gradient(135deg, var(--lab-primary), var(--lab-accent));
    --lab-gradient-dark: linear-gradient(135deg, #0A1525, #1A2744);
    --lab-shadow: 0 4px 24px rgba(59,158,255,0.10);
    --lab-shadow-hover: 0 12px 40px rgba(59,158,255,0.18);
    --lab-shadow-card: 0 2px 12px rgba(0,0,0,0.06);
    --lab-shadow-card-hover: 0 8px 32px rgba(59,158,255,0.12);
    --lab-radius: 12px;
    --lab-radius-lg: 20px;
    --lab-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Base === */
.lab-body {
    background: var(--lab-page-bg);
    color: var(--lab-text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.lab-main {
    padding-top: 80px;
}

/* === AI Tech Grid Background === */
.lab-body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(59,158,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,158,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* === Navbar === */
.lab-navbar {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--lab-border);
    padding: 12px 0;
    transition: var(--lab-transition);
    z-index: 1000;
}

.lab-navbar.scrolled {
    background: rgba(255,255,255,0.98);
    box-shadow: var(--lab-shadow-card);
}

.lab-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lab-logo-img {
    border-radius: 4px;
}

.lab-brand-text {
    font-weight: 700;
    font-size: 18px;
    color: var(--lab-dark);
}

.lab-navbar .nav-link {
    color: var(--lab-text-secondary);
    font-size: 14px;
    padding: 8px 16px;
    transition: var(--lab-transition);
}

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

.lab-nav-cta {
    background: var(--lab-gradient);
    color: var(--lab-white) !important;
    border-radius: 20px;
    font-weight: 600;
    padding: 8px 20px !important;
}

.lab-nav-cta:hover {
    box-shadow: 0 4px 20px rgba(59,158,255,0.35);
    transform: translateY(-1px);
}

/* === Hero (keeps dark gradient for AI impact) === */
.lab-hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--lab-gradient-dark);
}

.lab-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(59,158,255,0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(0,212,255,0.12) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite;
}

/* Grid overlay on hero for tech feel */
.lab-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0,212,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 1;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(2%, -2%); }
}

.lab-hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.lab-hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--lab-white);
    margin-bottom: 16px;
    line-height: 1.2;
}

.lab-hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
}

.lab-hero-highlight {
    color: var(--lab-accent);
}

/* === Buttons === */
.lab-btn-cta {
    background: var(--lab-gradient);
    color: var(--lab-white);
    border: none;
    border-radius: 24px;
    padding: 12px 32px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--lab-transition);
    text-decoration: none;
    display: inline-block;
}

.lab-btn-cta:hover {
    box-shadow: var(--lab-shadow-hover);
    transform: translateY(-2px);
    color: var(--lab-white);
}

.lab-btn-outline {
    background: transparent;
    color: var(--lab-primary);
    border: 2px solid var(--lab-primary);
    border-radius: 24px;
    padding: 10px 30px;
    font-weight: 600;
    transition: var(--lab-transition);
    text-decoration: none;
    display: inline-block;
}

.lab-btn-outline:hover {
    background: var(--lab-primary);
    color: var(--lab-white);
}

.lab-btn-gold {
    background: var(--lab-gold);
    color: var(--lab-dark);
    border: none;
    border-radius: 24px;
    padding: 12px 32px;
    font-weight: 700;
}

/* === Cards === */
.lab-card {
    background: var(--lab-card);
    border: 1px solid var(--lab-border);
    border-radius: var(--lab-radius);
    padding: 24px;
    transition: var(--lab-transition);
    box-shadow: var(--lab-shadow-card);
}

.lab-card:hover {
    background: var(--lab-card-hover);
    border-color: var(--lab-border-hover);
    box-shadow: var(--lab-shadow-card-hover);
    transform: translateY(-4px);
}

.lab-card-icon {
    width: 48px;
    height: 48px;
    background: var(--lab-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--lab-white);
    font-size: 24px;
    margin-bottom: 16px;
}

.lab-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--lab-text);
    margin-bottom: 8px;
}

.lab-card-text {
    font-size: 0.9rem;
    color: var(--lab-text-secondary);
    line-height: 1.5;
}

/* === Product Cards === */
.lab-product-card {
    background: var(--lab-card);
    border: 1px solid var(--lab-border);
    border-radius: var(--lab-radius-lg);
    padding: 32px;
    text-align: center;
    transition: var(--lab-transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--lab-shadow-card);
}

.lab-product-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--lab-gradient);
    opacity: 0;
    transition: var(--lab-transition);
}

.lab-product-card:hover {
    border-color: var(--lab-border-hover);
    box-shadow: var(--lab-shadow-card-hover);
    transform: translateY(-6px);
}

.lab-product-card:hover::after {
    opacity: 1;
}

.lab-product-icon {
    width: 64px;
    height: 64px;
    background: var(--lab-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--lab-white);
    font-size: 28px;
    margin: 0 auto 16px;
}

.lab-product-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--lab-text);
    margin-bottom: 8px;
}

.lab-product-tagline {
    font-size: 0.85rem;
    color: var(--lab-text-secondary);
    margin-bottom: 20px;
}

.lab-product-link {
    color: var(--lab-primary);
    font-weight: 600;
    text-decoration: none;
}

.lab-product-link:hover {
    color: var(--lab-dark);
}

/* === Engine Badges === */
.lab-engine-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,158,255,0.08);
    border: 1px solid var(--lab-border);
    border-radius: 20px;
    padding: 8px 16px;
    color: var(--lab-text);
    font-size: 0.85rem;
    transition: var(--lab-transition);
}

.lab-engine-badge:hover {
    background: rgba(59,158,255,0.15);
    border-color: var(--lab-primary);
    color: var(--lab-primary);
}

/* === Stats === */
.lab-stat {
    text-align: center;
    padding: 24px;
}

.lab-stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--lab-primary);
    line-height: 1;
}

.lab-stat-unit {
    font-size: 1rem;
    color: var(--lab-gold);
    font-weight: 600;
}

.lab-stat-label {
    font-size: 0.85rem;
    color: var(--lab-text-secondary);
    margin-top: 4px;
}

/* === Section === */
.lab-section {
    padding: 80px 0;
    position: relative;
}

.lab-section-dark {
    background: var(--lab-section-alt);
}

.lab-section-card {
    background: var(--lab-page-bg);
}

.lab-section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--lab-text);
    margin-bottom: 8px;
}

.lab-section-subtitle {
    font-size: 1rem;
    color: var(--lab-text-secondary);
    margin-bottom: 40px;
}

.lab-section-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(59,158,255,0.2), transparent);
    margin: 0;
}

/* === Partner Logos === */
.lab-partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
}

.lab-partner-item {
    background: var(--lab-card);
    border-radius: var(--lab-radius);
    padding: 20px;
    text-align: center;
    transition: var(--lab-transition);
    border: 1px solid var(--lab-border);
    box-shadow: var(--lab-shadow-card);
}

.lab-partner-item:hover {
    border-color: var(--lab-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--lab-shadow-card-hover);
}

.lab-partner-item img {
    max-width: 80px;
    max-height: 40px;
    margin-bottom: 8px;
}

.lab-partner-item .name {
    font-size: 0.85rem;
    color: var(--lab-text);
}

.lab-partner-founder {
    border: 2px solid var(--lab-gold);
    background: rgba(255,184,77,0.06);
}

/* === Team === */
.lab-team-card {
    text-align: center;
    padding: 24px;
}

.lab-team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--lab-primary);
    margin-bottom: 12px;
    object-fit: cover;
}

.lab-team-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--lab-text);
}

.lab-team-title {
    font-size: 0.8rem;
    color: var(--lab-primary);
}

.lab-team-bio {
    font-size: 0.8rem;
    color: var(--lab-text-secondary);
    margin-top: 8px;
}

/* === Case === */
.lab-case-card {
    background: var(--lab-card);
    border-radius: var(--lab-radius);
    padding: 24px;
    transition: var(--lab-transition);
    border: 1px solid var(--lab-border);
    box-shadow: var(--lab-shadow-card);
}

.lab-case-card:hover {
    border-color: var(--lab-border-hover);
    box-shadow: var(--lab-shadow-card-hover);
    transform: translateY(-4px);
}

.lab-case-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 16px;
}

.lab-case-industry {
    font-size: 0.75rem;
    color: var(--lab-primary);
    font-weight: 600;
}

.lab-case-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--lab-text);
    margin-bottom: 8px;
}

.lab-case-metric {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
}

.lab-case-metric .value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--lab-gold);
}

.lab-case-metric .label {
    font-size: 0.8rem;
    color: var(--lab-text-secondary);
}

/* === Diagnosis Form === */
.lab-diagnosis-form {
    background: var(--lab-card);
    border-radius: var(--lab-radius-lg);
    padding: 40px;
    border: 1px solid var(--lab-border);
    box-shadow: var(--lab-shadow-card);
}

.lab-form-group {
    margin-bottom: 20px;
}

.lab-form-label {
    color: var(--lab-text);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.lab-form-input {
    background: var(--lab-white);
    border: 1px solid var(--lab-border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--lab-text);
    font-size: 0.9rem;
    width: 100%;
    transition: var(--lab-transition);
}

.lab-form-input:focus {
    border-color: var(--lab-primary);
    box-shadow: 0 0 0 3px rgba(59,158,255,0.15);
    outline: none;
}

.lab-form-input::placeholder {
    color: var(--lab-gray);
}

.lab-engine-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 4px;
    padding: 8px 14px;
    background: rgba(59,158,255,0.06);
    border-radius: 16px;
    cursor: pointer;
    transition: var(--lab-transition);
    color: var(--lab-text);
}

.lab-engine-check:hover {
    background: rgba(59,158,255,0.12);
}

.lab-engine-check.checked {
    background: rgba(59,158,255,0.15);
    border: 1px solid var(--lab-primary);
    color: var(--lab-primary);
}

/* === Banner Carousel === */
.lab-banner-carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--lab-radius-lg);
    margin-bottom: 32px;
}

.lab-banner-slide {
    display: none;
    width: 100%;
}

.lab-banner-slide.active {
    display: block;
}

.lab-banner-slide img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--lab-radius-lg);
}

.lab-banner-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.lab-banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--lab-gray-light);
    cursor: pointer;
    transition: var(--lab-transition);
}

.lab-banner-dot.active {
    background: var(--lab-primary);
    width: 24px;
    border-radius: 5px;
}

/* === Footer === */
.lab-footer {
    background: var(--lab-white);
    border-top: 1px solid var(--lab-border);
    padding: 48px 0 24px;
}

.lab-footer h5 {
    color: var(--lab-text);
    font-weight: 700;
}

.lab-footer h6 {
    color: var(--lab-primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.lab-footer-tagline {
    color: var(--lab-text-secondary);
    font-size: 0.85rem;
}

.lab-footer-links {
    list-style: none;
    padding: 0;
}

.lab-footer-links li {
    margin-bottom: 8px;
}

.lab-footer-links a {
    color: var(--lab-text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--lab-transition);
}

.lab-footer-links a:hover {
    color: var(--lab-primary);
}

.lab-footer-divider {
    border-color: var(--lab-border);
}

.lab-footer-bottom {
    color: var(--lab-text-secondary);
    font-size: 0.8rem;
}

.lab-footer-friends {
    font-size: 0.8rem;
}

.lab-footer-friends a {
    color: var(--lab-text-secondary);
    margin-right: 12px;
    text-decoration: none;
}

.lab-footer-friends a:hover {
    color: var(--lab-primary);
}

/* === Animations === */
.animate-fadeInUp {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s, transform 0.6s;
}

.animate-fadeInUp.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 数字递增动画 */
.lab-counter {
    font-variant-numeric: tabular-nums;
}

/* 脉冲发光 */
.lab-pulse {
    animation: labPulse 2s infinite;
}

@keyframes labPulse {
    0% { box-shadow: 0 0 0 0 rgba(59,158,255,0.35); }
    70% { box-shadow: 0 0 0 10px rgba(59,158,255,0); }
    100% { box-shadow: 0 0 0 0 rgba(59,158,255,0); }
}

/* === Responsive === */
@media (max-width: 991px) {
    .lab-hero-title {
        font-size: 2.2rem;
    }
    .lab-section {
        padding: 60px 0;
    }
    .lab-navbar .navbar-nav {
        padding-top: 16px;
    }
}

@media (max-width: 768px) {
    .lab-hero {
        min-height: 400px;
        padding: 40px 0;
    }
    .lab-hero-title {
        font-size: 1.8rem;
    }
    .lab-hero-subtitle {
        font-size: 1rem;
    }
    .lab-section-title {
        font-size: 1.5rem;
    }
    .lab-stat-value {
        font-size: 2rem;
    }
    .lab-product-card {
        padding: 24px;
    }
    .lab-diagnosis-form {
        padding: 24px;
    }
    .lab-banner-slide img {
        height: 220px;
    }
}

@media (max-width: 576px) {
    .lab-hero-title {
        font-size: 1.5rem;
    }
    .lab-brand-text {
        font-size: 14px;
    }
}

/* === 表单提交成功提示 === */
.lab-success-msg {
    text-align: center;
    padding: 40px 20px;
}

.lab-success-msg i {
    font-size: 3rem;
    color: #28a745;
    margin-bottom: 16px;
}

.lab-success-msg h4 {
    color: var(--lab-text);
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.lab-success-msg p {
    color: var(--lab-text-secondary);
    font-size: 0.9rem;
}

/* === 导航栏产品下拉 === */
.lab-nav-dropdown .dropdown-menu {
    background: var(--lab-white);
    border: 1px solid var(--lab-border);
    border-radius: var(--lab-radius);
    padding: 8px;
    min-width: 200px;
    box-shadow: var(--lab-shadow-card);
}

.lab-nav-dropdown .dropdown-item {
    color: var(--lab-text-secondary);
    font-size: 14px;
    padding: 8px 16px;
    border-radius: 6px;
    transition: var(--lab-transition);
}

.lab-nav-dropdown .dropdown-item:hover {
    background: rgba(59,158,255,0.08);
    color: var(--lab-primary);
}

/* === 空状态 === */
.lab-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--lab-text-secondary);
}

.lab-empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
    color: var(--lab-primary);
}

/* === 资质卡片 === */
.lab-cert-card {
    background: var(--lab-card);
    border: 1px solid var(--lab-border);
    border-radius: var(--lab-radius);
    padding: 24px;
    text-align: center;
    transition: var(--lab-transition);
    box-shadow: var(--lab-shadow-card);
}

.lab-cert-card:hover {
    border-color: var(--lab-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--lab-shadow-card-hover);
}

.lab-cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,184,77,0.12);
    color: #C88600;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

/* === AI Glow Dot Decoration === */
.lab-glow-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--lab-accent);
    border-radius: 50%;
    opacity: 0;
    animation: glowDot 4s ease-in-out infinite;
}

@keyframes glowDot {
    0%, 100% { opacity: 0; transform: scale(0.5); }
    50% { opacity: 0.6; transform: scale(1.5); }
}

/* === CTA Section with Gradient === */
.lab-section-cta {
    background: var(--lab-gradient-dark);
    color: var(--lab-white);
    position: relative;
}

.lab-section-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.lab-section-cta .lab-section-title {
    color: var(--lab-white);
}

.lab-section-cta .lab-section-subtitle {
    color: rgba(255,255,255,0.7);
}

/* === Product Cover Image === */
.lab-product-cover {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: var(--lab-radius-lg);
    margin-bottom: 24px;
    box-shadow: var(--lab-shadow);
}

/* === Navbar Dark (for hero-only pages) === */
.navbar-dark.lab-navbar {
    background: rgba(10,21,37,0.92);
    border-bottom: 1px solid rgba(59,158,255,0.2);
}

.navbar-dark.lab-navbar .lab-brand-text {
    color: var(--lab-white);
}

.navbar-dark.lab-navbar .nav-link {
    color: rgba(255,255,255,0.7);
}

.navbar-dark.lab-navbar .nav-link:hover,
.navbar-dark.lab-navbar .nav-link.active {
    color: var(--lab-accent);
}

.navbar-dark.lab-navbar.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: var(--lab-shadow-card);
}

.navbar-dark.lab-navbar.scrolled .lab-brand-text {
    color: var(--lab-dark);
}

.navbar-dark.lab-navbar.scrolled .nav-link {
    color: var(--lab-text-secondary);
}

.navbar-dark.lab-navbar.scrolled .nav-link:hover,
.navbar-dark.lab-navbar.scrolled .nav-link.active {
    color: var(--lab-primary);
}

.navbar-dark.lab-nav-dropdown .dropdown-menu {
    background: var(--lab-white);
    border: 1px solid var(--lab-border);
    box-shadow: var(--lab-shadow-card);
}

.navbar-dark.lab-nav-dropdown .dropdown-item {
    color: var(--lab-text-secondary);
}

.navbar-dark.lab-nav-dropdown .dropdown-item:hover {
    color: var(--lab-primary);
}