/* ========================================
   心脑教练领导力® 网站样式
   Heart-Brain Coaching Leadership®
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary-dark: #0B1F3A;
    --primary-red: #E8503A;
    --accent-gold: #C8A951;
    --bg-light: #F7F4EF;
    --bg-white: #FFFFFF;
    --text-dark: #1A1A2E;
    --text-gray: #6B7280;
    --text-light: #9CA3AF;
    
    /* Fonts - 系统字体优先，避免依赖 Google Fonts */
    --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-serif: Georgia, "Times New Roman", "STSong", "SimSun", "Songti SC", serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-cn);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-red);
    color: var(--bg-white);
}

.btn-primary:hover {
    background-color: #d64530;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(232, 80, 58, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-dark);
    color: var(--primary-dark);
}

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

.btn-small {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-cn {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.logo-en {
    font-size: 0.75rem;
    color: var(--text-gray);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--primary-dark);
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu a {
    font-size: 0.9375rem;
    color: var(--text-dark);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-red);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-red);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(232, 80, 58, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(200, 169, 81, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--bg-white);
}

.hero-slogan {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1rem;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.hero-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-cta .btn-primary {
    background-color: var(--primary-red);
}

.hero-cta .btn-outline {
    border-color: var(--bg-white);
    color: var(--bg-white);
}

.hero-cta .btn-outline:hover {
    background-color: var(--bg-white);
    color: var(--primary-dark);
}

.hero-visual {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    padding: var(--spacing-xl);
}

.heart-brain-icon {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.heart-circle,
.brain-circle,
.coach-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.heart-circle {
    background: linear-gradient(135deg, var(--primary-red) 0%, #ff6b5b 100%);
    box-shadow: 0 20px 60px rgba(232, 80, 58, 0.4);
}

.brain-circle {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #e0c06a 100%);
    box-shadow: 0 20px 60px rgba(200, 169, 81, 0.4);
}

.coach-circle {
    background: linear-gradient(135deg, #1e4d8c 0%, var(--primary-navy) 100%);
    box-shadow: 0 20px 60px rgba(11, 31, 58, 0.45);
    border: 2px solid var(--accent-gold);
}

.icon-text {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bg-white);
}

.icon-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 4px;
}

.connection-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-red), var(--accent-gold));
    border-radius: 2px;
    position: relative;
}

.connection-line::before,
.connection-line::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--bg-white);
    top: 50%;
    transform: translateY(-50%);
}

.connection-line::before {
    left: -4px;
}

.connection-line::after {
    right: -4px;
}

/* ========================================
   Three Systems Section
   ======================================== */
.systems {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-light);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.system-card {
    background-color: var(--bg-white);
    border-radius: 20px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.system-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.system-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.system-icon svg {
    width: 40px;
    height: 40px;
}

.heart-icon {
    background: linear-gradient(135deg, var(--primary-red) 0%, #ff6b5b 100%);
    color: var(--bg-white);
}

.brain-icon {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: var(--bg-white);
}

.coach-icon {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #e0c06a 100%);
    color: var(--primary-dark);
}

.system-card h3 {
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.system-en {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
}

.system-desc {
    font-size: 0.9375rem;
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.system-features {
    text-align: left;
}

.system-features li {
    font-size: 0.875rem;
    color: var(--text-gray);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--bg-light);
}

.system-features li:last-child {
    border-bottom: none;
}

.system-features li::before {
    content: '✓ ';
    color: var(--primary-red);
    font-weight: bold;
}

/* ========================================
   Courses Section
   ======================================== */
.courses {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.course-card {
    background-color: var(--bg-light);
    border-radius: 20px;
    padding: var(--spacing-xl);
    position: relative;
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.course-card.featured {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
    color: var(--bg-white);
}

.course-card.featured h3,
.course-card.featured .course-desc,
.course-card.featured .course-en {
    color: var(--bg-white);
}

.course-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-red);
    color: var(--bg-white);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
}

.course-card.featured .course-tag {
    background-color: var(--accent-gold);
    color: var(--primary-dark);
}

.course-card h3 {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.course-en {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
}

.course-desc {
    font-size: 0.9375rem;
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.course-info {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
}

.course-card.featured .course-info {
    color: rgba(255, 255, 255, 0.8);
}

.btn-small {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    background-color: var(--primary-dark);
    color: var(--bg-white);
    border-radius: 50px;
    transition: var(--transition);
}

.course-card.featured .btn-small {
    background-color: var(--bg-white);
    color: var(--primary-dark);
}

.btn-small:hover {
    transform: translateY(-2px);
}

/* ========================================
   Clients Section
   ======================================== */
.clients {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-light);
}

.client-logos {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.logo-item {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-md);
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    transition: var(--transition);
}

.logo-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.client-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xxl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-red);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-gray);
}

/* ========================================
   Founder Section
   ======================================== */
.founder {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.founder-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.founder-image {
    position: relative;
}

.image-placeholder {
    width: 300px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
}

.image-placeholder span {
    font-size: 1.5rem;
    font-weight: 700;
}

.founder-info h2 {
    font-size: 0.875rem;
    color: var(--primary-red);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
}

.founder-info h3 {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.founder-title {
    font-size: 1.125rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
}

.founder-credentials {
    margin-bottom: var(--spacing-lg);
}

.credential {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--bg-light);
}

.credential:last-child {
    border-bottom: none;
}

.credential-icon {
    font-size: 1.5rem;
}

.credential strong {
    display: block;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.credential p {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 2px;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-red) 0%, #ff6b5b 100%);
    text-align: center;
    color: var(--bg-white);
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.cta p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.cta .btn-primary {
    background-color: var(--bg-white);
    color: var(--primary-red);
}

.cta .btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--bg-white);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--primary-dark);
    color: var(--bg-white);
    padding: var(--spacing-xxl) 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xxl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-brand .slogan {
    margin-top: var(--spacing-md);
    font-style: italic;
    color: var(--accent-gold);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-gold);
}

.footer-links ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--bg-white);
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    padding: var(--spacing-md) 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ========================================
   Mobile Responsive
   ======================================== */
@media (max-width: 992px) {
    .systems-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .founder-content {
        text-align: left;
    }
    
    .founder-image {
        margin: 0 auto;
    }
    
    .image-placeholder {
        width: 250px;
        height: 300px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-slogan {
        font-size: 1.75rem;
    }
    
    .hero-desc {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .heart-brain-icon {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .connection-line {
        width: 4px;
        height: 40px;
    }
    
    .heart-circle,
    .brain-circle {
        width: 100px;
        height: 100px;
    }
    
    .icon-text {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .client-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .client-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .founder-info h3 {
        font-size: 1.5rem;
    }
    
    .cta h2 {
        font-size: 1.5rem;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   About Page - Founder Section
   ======================================== */
.founder-detail {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-white);
}

.founder-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.founder-photo {
    position: sticky;
    top: 100px;
}

.photo-frame {
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(11, 31, 58, 0.15);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
}

.photo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    text-align: center;
    padding: var(--spacing-lg);
}

.photo-placeholder span {
    font-size: 4rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: 4px;
}

.photo-placeholder small {
    font-size: 1rem;
    color: var(--accent-gold);
    letter-spacing: 2px;
}

.founder-contact {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: 12px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.875rem;
    word-break: break-all;
}

.contact-item:hover {
    color: var(--primary-red);
}

.contact-item .icon {
    font-size: 1.25rem;
}


.founder-content h2 {
    font-size: 0.875rem;
    color: var(--primary-red);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.founder-content h3 {
    font-size: 2.25rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.founder-tagline {
    font-size: 1.125rem;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.founder-bio {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--primary-red);
}

.founder-bio p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.founder-bio p:last-child {
    margin-bottom: 0;
}

.credentials-section h4 {
    font-size: 1.75rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--bg-light);
    font-weight: 700;
}

.credential-item {
    background: var(--bg-white);
    border: 1px solid var(--bg-light);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    width: 100%;
    box-sizing: border-box;
}

.credential-item:hover {
    border-color: var(--primary-red);
    box-shadow: 0 4px 20px rgba(232, 80, 58, 0.08);
}

.credential-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.credential-badge {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9375rem;
    flex-shrink: 0;
}

.credential-badge.heart {
    background: linear-gradient(135deg, var(--primary-red) 0%, #ff6b5a 100%);
}

.credential-badge.academy {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #e0c06a 100%);
    color: var(--primary-dark);
}

.credential-header strong {
    display: block;
    color: var(--primary-dark);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.credential-header p {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.credential-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-sm) 0;
}

.credential-list li {
    padding: 0.75rem 0;
    padding-left: 1.75rem;
    position: relative;
    border-bottom: 1px dashed var(--bg-light);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.credential-list li:last-child {
    border-bottom: none;
}

.credential-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-red);
    font-weight: bold;
}

.credential-list li strong {
    color: var(--primary-dark);
    display: block;
    margin-bottom: 0;
    white-space: normal;
    font-size: 1.0625rem;
    line-height: 1.5;
}

.credential-list li span {
    color: var(--text-gray);
    font-size: 0.875rem;
    font-style: italic;
}

.credential-link {
    display: inline-block;
    color: var(--primary-red);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: var(--spacing-sm);
    transition: var(--transition);
}

.credential-link:hover {
    color: var(--primary-dark);
}

.credential-desc {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 1rem;
    margin: 0;
}

@media (max-width: 992px) {
    .founder-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .founder-photo {
        position: static;
        max-width: 320px;
        margin: 0 auto;
        width: 100%;
    }
    .founder-content h3 {
        font-size: 1.75rem;
    }
}

@media (max-width: 768px) {
    .photo-placeholder span {
        font-size: 3rem;
    }
    .credential-header {
        gap: var(--spacing-sm);
    }
    .credential-badge {
        width: 40px;
        height: 40px;
    }
}

.systems-grid .system-card,
.courses-grid .course-card {
    animation: fadeInUp 0.6s ease forwards;
}

.systems-grid .system-card:nth-child(2),
.courses-grid .course-card:nth-child(2) {
    animation-delay: 0.1s;
}

.systems-grid .system-card:nth-child(3),
.courses-grid .course-card:nth-child(3) {
    animation-delay: 0.2s;
}

.systems-grid .system-card:nth-child(4),
.courses-grid .course-card:nth-child(4) {
    animation-delay: 0.3s;
}

/* ====== 凭证徽章变体 ====== */
.credential-badge.media {
    background: linear-gradient(135deg, #1a73e8 0%, #0b1f3a 100%);
    color: var(--bg-white);
}

.credential-badge.award {
    background: linear-gradient(135deg, #C8A951 0%, #E8503A 100%);
    color: var(--bg-white);
}

/* ====== 凭证画廊 ====== */
.credentials-gallery {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--bg-light);
}

.credentials-gallery h5 {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.gallery-item {
    display: block;
    background: var(--bg-white);
    border: 1px solid var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(11, 31, 58, 0.06);
}

.gallery-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(11, 31, 58, 0.12);
    border-color: var(--primary-red);
}

.gallery-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    background: var(--bg-light);
}

.gallery-caption {
    padding: var(--spacing-sm) var(--spacing-md);
    border-top: 1px solid var(--bg-light);
}

.gallery-caption strong {
    display: block;
    font-size: 0.95rem;
    color: var(--primary-dark);
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.gallery-caption span {
    font-size: 0.8rem;
    color: var(--text-light);
    letter-spacing: 0.01em;
}

/* 官方凭证 · 来自 sfmchina.com */
.sfm-gallery {
    margin: 2.5rem 0 0;
    padding: 2rem 1.75rem 1.75rem;
    background: linear-gradient(135deg, rgba(11, 31, 58, 0.03), rgba(232, 80, 58, 0.04));
    border: 1px solid rgba(232, 80, 58, 0.18);
    border-radius: 14px;
    position: relative;
}

.sfm-gallery h5 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sfm-gallery h5::before {
    content: "★";
    color: var(--accent-color);
    font-size: 1rem;
}

.sfm-gallery-intro {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.65;
    margin: 0 0 1.5rem;
}

.sfm-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.sfm-item {
    display: block;
    background: #fff;
    border: 1px solid rgba(11, 31, 58, 0.08);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.sfm-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(11, 31, 58, 0.12);
    border-color: var(--accent-color);
}

.sfm-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    background: #f7f4ef;
}

.sfm-caption {
    padding: 0.75rem 0.9rem;
}

.sfm-caption strong {
    display: block;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.2rem;
}

.sfm-caption span {
    font-size: 0.78rem;
    color: var(--text-light);
    letter-spacing: 0.01em;
}

.sfm-gallery-link {
    display: inline-block;
    margin-top: 1.25rem;
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.sfm-gallery-link:hover {
    border-bottom-color: var(--accent-color);
}

@media (max-width: 1024px) {
    .sfm-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    .gallery-item img {
        height: 200px;
    }
}


/* ===== HeartMath Science Gallery (首页) ===== */
.heartmath-gallery {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #eef2f7 100%);
}

.gallery-header {
    text-align: center;
    margin-bottom: 50px;
}

.gallery-badge {
    display: inline-block;
    background: linear-gradient(135deg, #e84a5f 0%, #ff6b81 100%);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 6px 18px;
    border-radius: 20px;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(232, 74, 95, 0.25);
}

.gallery-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #1a2b4a;
    margin-bottom: 8px;
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.gallery-subtitle {
    font-size: 1rem;
    color: #5a6b85;
    letter-spacing: 0.5px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.gallery-item {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(26, 43, 74, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(26, 43, 74, 0.15);
}

.gallery-item-featured {
    border: 2px solid #e84a5f;
}

.gallery-image-wrapper {
    position: relative;
    overflow: hidden;
    background: #f0f3f7;
}

.gallery-image {
    width: 100%;
    height: 320px;
    object-fit: contain;
    display: block;
    transition: transform 0.4s ease;
}

.gallery-image-wrapper:hover .gallery-image {
    transform: scale(1.03);
}

.image-overlay {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(26, 43, 74, 0.85);
    color: #fff;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.image-overlay.featured {
    background: linear-gradient(135deg, #e84a5f 0%, #ff6b81 100%);
}

.gallery-caption {
    padding: 24px;
}

.gallery-caption h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1a2b4a;
    margin-bottom: 12px;
}

.gallery-caption p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #4a5a72;
    margin-bottom: 16px;
}

.gallery-caption strong {
    color: #e84a5f;
    font-weight: 700;
}

.gallery-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.meta-tag {
    font-size: 0.75rem;
    background: #eef2f7;
    color: #5a6b85;
    padding: 4px 10px;
    border-radius: 10px;
}

.meta-tag.featured {
    background: linear-gradient(135deg, #e84a5f 0%, #ff6b81 100%);
    color: #fff;
}

.gallery-cta {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(26, 43, 74, 0.06);
}

.cta-text {
    font-size: 1.05rem;
    color: #1a2b4a;
    margin-bottom: 20px;
    font-weight: 500;
}

.cta-text strong {
    color: #e84a5f;
}

@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gallery-item-featured {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .heartmath-gallery {
        padding: 50px 0;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .gallery-title {
        font-size: 1.8rem;
    }
    .gallery-image {
        height: 260px;
    }
}

/* ===== Course Banner (HeartMath hero in courses.html) ===== */
.course-banner {
    margin-bottom: 24px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 24px rgba(26, 43, 74, 0.10);
}

.course-banner-img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 280px;
    object-fit: cover;
}

/* ===== Gallery Text Card (about.html HeartMath science) ===== */
.gallery-item-text {
    background: linear-gradient(135deg, #1a2b4a 0%, #2a3f63 100%);
    display: flex;
    align-items: center;
}

.gallery-item-text .gallery-caption h3 {
    color: #ffffff;
}

.gallery-item-text .gallery-caption p {
    color: #cdd6e5;
}

.gallery-item-text .gallery-caption strong {
    color: #ff8a9b;
}

.gallery-item-text .meta-tag {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

.gallery-item-text .meta-tag.featured {
    background: linear-gradient(135deg, #e84a5f 0%, #ff6b81 100%);
}