/* ============================================
   汉纬信息咨询 - 企业官网样式
   HEARTWAY - Corporate Website Styles
   ============================================ */

/* CSS Variables */
:root {
    /* 主色调 - 优雅的森林绿色系 */
    --primary: #1a5d3a;
    --primary-light: #2d7a4e;
    --primary-dark: #0f3d26;
    
    /* 强调色 - 翡翠绿/祖母绿 */
    --accent: #10a37f;
    --accent-light: #2ec4a0;
    --accent-dark: #0d8a6b;
    
    /* 金色点缀 - 暖金色与绿色搭配更和谐 */
    --gold: #c9a227;
    --gold-light: #e0bf4c;
    
    /* 中性色 - 带一点绿调 */
    --dark: #152820;
    --gray-900: #1e3a2f;
    --gray-800: #3d5a4d;
    --gray-700: #4a6b5c;
    --gray-600: #5f8070;
    --gray-500: #8fa99c;
    --gray-400: #b8ccc2;
    --gray-300: #d4e5dc;
    --gray-200: #e8f2ed;
    --gray-100: #f3f9f6;
    --white: #ffffff;
    
    /* 功能色 */
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    --gradient-dark: linear-gradient(180deg, var(--primary-dark) 0%, var(--dark) 100%);
    
    /* 字体 */
    --font-serif: 'PingFang SC','Microsoft YaHei', 'Heiti SC', 'SimHei', sans-serif, serif;
    --font-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* 阴影 - 带绿色调 */
    --shadow-sm: 0 1px 2px rgba(15, 61, 38, 0.05);
    --shadow-md: 0 4px 6px rgba(15, 61, 38, 0.08);
    --shadow-lg: 0 10px 25px rgba(15, 61, 38, 0.12);
    --shadow-xl: 0 20px 40px rgba(15, 61, 38, 0.18);
    --shadow-glow: 0 0 40px rgba(16, 163, 127, 0.4);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
}

/* ============================================
   统一标题样式类 - 用于红框标题
   ============================================ */
.main-heading {
    font-family: 'PingFang SC','Microsoft YaHei', 'Heiti SC', 'SimHei', sans-serif;
    font-weight: 100;
    letter-spacing: 0.05em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
    border-color: var(--accent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-secondary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-block {
    width: 100%;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(26, 93, 58, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-image {
    height: 50px;
    width: auto;
    display: block;
}

.logo-text {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 0.05em;
}

.logo-subtitle {
    font-size: 0.625rem;
    color: var(--accent-light);
    letter-spacing: 0.1em;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    padding: var(--spacing-sm) var(--spacing-md);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-item-dropdown {
    position: relative;
}

.nav-item-dropdown > .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-caret {
    font-size: 0.65rem;
    opacity: 0.8;
    transition: transform 0.2s ease;
}

.nav-item-dropdown:hover > .nav-link .nav-caret,
.nav-item-dropdown.open > .nav-link .nav-caret {
    transform: rotate(180deg);
}

/* 策略工具下拉：白底卡片 + 品牌绿字，保证在深色 Banner 上可读 */
.navbar .nav-item-dropdown > .nav-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 248px;
    padding: 10px;
    margin: 0;
    list-style: none;
    background: #ffffff;
    border: 1px solid rgba(26, 93, 58, 0.1);
    border-radius: 14px;
    box-shadow:
        0 4px 6px rgba(15, 61, 38, 0.04),
        0 18px 40px rgba(15, 61, 38, 0.18);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
    z-index: 1200;
}

/* 悬停桥接：避免鼠标移入菜单时闪断 */
.navbar .nav-item-dropdown > .nav-dropdown::before {
    content: '';
    position: absolute;
    top: -14px;
    left: 0;
    right: 0;
    height: 14px;
}

.navbar .nav-item-dropdown > .nav-dropdown::after {
    content: '';
    position: absolute;
    top: -6px;
    right: 28px;
    width: 12px;
    height: 12px;
    background: #ffffff;
    border-left: 1px solid rgba(26, 93, 58, 0.1);
    border-top: 1px solid rgba(26, 93, 58, 0.1);
    transform: rotate(45deg);
}

.navbar .nav-item-dropdown:hover > .nav-dropdown,
.navbar .nav-item-dropdown.open > .nav-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.navbar .nav-item-dropdown > .nav-dropdown li + li {
    margin-top: 4px;
}

.navbar .nav-item-dropdown > .nav-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    color: #1a5d3a !important;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.35;
    white-space: nowrap;
    border-radius: 10px;
    background: transparent;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.navbar .nav-item-dropdown > .nav-dropdown a::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #c9a227;
    flex-shrink: 0;
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.16);
}

.navbar .nav-item-dropdown > .nav-dropdown a:hover {
    background: #f3f9f6;
    color: #0d8a6b !important;
    transform: translateX(2px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
}

.hero-bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    opacity: 0.25;
    filter: blur(2px);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(16, 163, 127, 0.35) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(46, 196, 160, 0.2) 0%, transparent 40%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-xl);
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

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

.hero-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(16, 163, 127, 0.25);
    border: 1px solid rgba(16, 163, 127, 0.5);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--accent-light);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--accent-light);
    text-shadow: 0 0 40px rgba(16, 163, 127, 0.6);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-2xl);
    font-weight: 300;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9375rem;
}

.hero-feature i {
    color: var(--accent-light);
}

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

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-5xl);
}

.section-header.left {
    text-align: left;
}

.section-header.light .section-title,
.section-header.light .section-desc,
.section-header.light p {
    color: var(--white);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

.section-desc-en {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-style: italic;
    max-width: 700px;
    margin: var(--spacing-sm) auto 0;
}

.section-more {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ============================================
   Advantages Section
   ============================================ */
.advantages {
    background: var(--gray-100);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.advantage-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    font-size: 2rem;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.advantage-card p {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
    position: relative;
    background: var(--gradient-primary);
    padding: var(--spacing-3xl) 0;
}

.stats-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 0% 50%, rgba(16, 163, 127, 0.25) 0%, transparent 50%),
        radial-gradient(ellipse at 100% 50%, rgba(46, 196, 160, 0.1) 0%, transparent 50%);
    overflow: hidden;
}

.stats-bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
    filter: blur(3px);
}

.stats-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-lg);
}

.stat-number {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--white);
    display: inline;
}

.stat-suffix {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--accent-light);
    display: inline;
}

.stat-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: var(--spacing-sm);
}

.stats-detail {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stats-detail p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

/* ============================================
   Hot Courses Section
   ============================================ */
.hot-courses {
    background: var(--white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.course-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.course-card.featured {
    border: 2px solid var(--accent);
}

.course-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    z-index: 10;
}

.course-image {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gray-100);
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-image i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.4);
}

.course-content {
    padding: var(--spacing-lg);
}

.course-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.course-content p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.course-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ============================================
   Partners Section
   ============================================ */
.partners-preview {
    background: var(--gray-900);
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.partners-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.partners-image-block {
    text-align: center;
}

.category-label {
    color: var(--accent-light);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--accent);
    display: inline-block;
    text-align: left;
}

.partners-image-wrapper {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: var(--transition-base);
    overflow: hidden;
}

.partners-image-wrapper:hover {
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
    transform: translateY(-4px);
}

.partners-showcase-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

@media (max-width: 768px) {
    .partners-image-wrapper {
        padding: var(--spacing-md);
    }
    
    .category-label {
        font-size: 0.875rem;
    }
}

.partners-category {
    margin-bottom: var(--spacing-xl);
}

.partners-category:last-child {
    margin-bottom: 0;
}

.partners-slider {
    overflow: hidden;
}

.partners-slider.reverse .partners-track {
    animation-direction: reverse;
}

.partners-track {
    display: flex;
    gap: var(--spacing-xl);
    animation: scroll 30s linear infinite;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.partner-logo {
    flex-shrink: 0;
    width: 140px;
    height: 55px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    padding: 8px 12px;
}

.partner-logo:hover {
    background: rgba(255, 255, 255, 0.15);
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.85;
    transition: var(--transition-base);
}

.partner-logo:hover img {
    opacity: 1;
}

.partner-logo span {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ============================================
   Testimonials Section
   ============================================ */
.testimonials {
    background: var(--gray-100);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-quote {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--accent);
    opacity: 0.3;
}

.testimonial-text {
    font-size: 0.9375rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 45px;
    height: 45px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 1rem;
}

.author-info h4 {
    font-size: 0.9375rem;
    margin-bottom: 2px;
}

.author-info span {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--white);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.about-text p {
    margin-bottom: var(--spacing-md);
}

.about-text .lead {
    font-size: 1.125rem;
    color: var(--gray-700);
    font-weight: 500;
}

.about-philosophy {
    background: var(--gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
}

.about-philosophy h4 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-philosophy > p {
    font-size: 0.9375rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
}

.philosophy-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.philosophy-list li {
    font-size: 0.875rem;
    color: var(--gray-600);
    padding-left: var(--spacing-md);
    border-left: 2px solid var(--accent);
}

.philosophy-list li strong {
    color: var(--primary);
}

.about-mission {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.mission-item {
    padding: var(--spacing-lg);
    background: var(--gray-100);
    border-radius: var(--radius-md);
}

.mission-item h4 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mission-item p {
    font-size: 0.9375rem;
    color: var(--gray-700);
    margin: 0;
}

.about-values {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    color: var(--white);
}

.about-values h4 {
    font-size: 1rem;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-values p {
    font-size: 0.9375rem;
    margin: 0;
    opacity: 0.9;
}

.about-visual {
    position: relative;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.2);
}

.about-main-image {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--accent);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.badge-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
}

.badge-text {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   Core Advantages Section
   ============================================ */
.core-advantages {
    background: var(--gray-100);
}

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

.core-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.core-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.core-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.core-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.core-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin: 0;
}

/* ============================================
   Timeline Section
   ============================================ */
.timeline {
    background: var(--white);
}

.timeline-wrapper {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-300);
    transform: translateX(-50%);
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.timeline-item {
    position: relative;
    display: flex;
    justify-content: flex-end;
    padding-right: calc(50% + 40px);
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: calc(50% + 40px);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 3px solid var(--white);
    border-radius: var(--radius-full);
    transform: translateX(-50%);
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    max-width: 400px;
}

.timeline-year {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
}

.timeline-content h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin: 0;
}

/* ============================================
   Services Section
   ============================================ */
.services {
    background: var(--gray-100);
}

.services-main {
    margin-bottom: var(--spacing-2xl);
}

.service-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
}

.service-card.large {
    text-align: center;
    padding: var(--spacing-3xl);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    font-size: 2rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.service-card > p {
    font-size: 1rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.service-features {
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.service-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.service-features li i {
    color: var(--accent);
    margin-top: 4px;
}

.service-flow {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.flow-title {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.flow-steps {
    display: flex;
    align-items: stretch;
    gap: var(--spacing-md);
}

.flow-step {
    flex: 1;
    background: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    background: var(--accent);
    color: var(--white);
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.step-content h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    font-size: 0.8125rem;
    color: var(--gray-600);
    margin: 0;
}

.flow-arrow {
    display: flex;
    align-items: center;
    color: var(--accent);
    font-size: 1.25rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.service-feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.service-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.service-feature-card h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.service-feature-card p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
}

/* ============================================
   Courses Section
   ============================================ */
.courses {
    background: var(--white);
}

.course-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.course-tab {
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition-base);
}

.course-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.course-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.course-panel {
    display: none;
}

.course-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.course-category {
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
}

.category-header {
    margin-bottom: var(--spacing-xl);
}

.category-header h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.category-header h3 i {
    color: var(--accent);
}

.category-header p {
    color: var(--gray-600);
    margin: 0;
}

.subcategory {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-300);
}

.subcategory-title {
    font-size: 1.125rem;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.category-courses {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.course-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.course-item.clickable {
    cursor: pointer;
}

.course-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.course-item .course-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--white);
}

.course-info h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.course-info p {
    font-size: 0.8125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.course-tags .tag {
    padding: 2px 8px;
    background: var(--gray-200);
    color: var(--gray-700);
    font-size: 0.6875rem;
    border-radius: var(--radius-sm);
}

/* ============================================
   Cases Section
   ============================================ */
.cases {
    background: var(--gray-100);
}

.case-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.case-category {
    margin-bottom: var(--spacing-2xl);
}

.case-category-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.case-category-title span {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--accent);
    color: var(--white);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-full);
}

.case-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.case-showcase img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.case-showcase img:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-xl);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.case-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    padding: var(--spacing-lg);
    text-align: center;
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-logo {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.case-logo span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
}

.case-info p {
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-xs);
}

.case-info small {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ============================================
   Founder Section
   ============================================ */
.founder {
    background: var(--white);
}

.founder-wrapper {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.founder-image {
    position: relative;
}

.image-frame {
    position: relative;
    z-index: 2;
}

.founder-placeholder {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: rgba(255, 255, 255, 0.2);
}

.founder-photo {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.founder-decoration {
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 3px solid var(--accent);
    border-radius: var(--radius-xl);
    z-index: 1;
}

.founder-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.founder-title {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--spacing-lg);
}

.founder-bio {
    margin-bottom: var(--spacing-xl);
}

.founder-bio p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
}

.founder-core, .founder-views {
    background: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.founder-core h4, .founder-views h4 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.founder-core ul, .founder-views ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.founder-core li, .founder-views li {
    font-size: 0.9375rem;
    color: var(--gray-700);
    padding-left: var(--spacing-md);
    position: relative;
}

.founder-core li::before, .founder-views li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.founder-views li strong {
    color: var(--primary);
}

.founder-achievements {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.achievement-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--gray-100);
    border-radius: var(--radius-md);
}

.achievement-item > i {
    font-size: 1.5rem;
    color: var(--accent);
    flex-shrink: 0;
}

.book-cover {
    flex-shrink: 0;
    width: 100px;
}

.book-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

.book-image:hover {
    transform: scale(1.05);
}

.achievement-item h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.achievement-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
}

/* ============================================
   News Section
   ============================================ */
.news {
    background: var(--gray-100);
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.news-tab {
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition-base);
}

.news-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.news-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.news-panel {
    display: none;
}

.news-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.news-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.news-image {
    height: 160px;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.news-image i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.3);
}

.news-image.has-cover {
    background: none;
}

.news-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.3s ease;
}

.news-card:hover .news-cover-image {
    transform: scale(1.05);
}

.news-image.has-cover .news-date {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.news-date {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
}

.news-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    min-height: 180px;
}

.news-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gray-100);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
    align-self: flex-start;
}

.news-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
    min-height: 2.8em;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--accent);
    font-weight: 500;
    text-decoration: none;
    margin-top: auto;
}

.news-link:hover {
    color: var(--accent-dark);
}

.news-link:focus,
.news-link:focus-visible {
    outline: none;
    border: none;
    box-shadow: none;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--gradient-dark);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(16, 163, 127, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(26, 93, 58, 0.25) 0%, transparent 50%);
}

.contact-wrapper {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    background: rgba(16, 163, 127, 0.25);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--accent-light);
}

.contact-text h4 {
    font-size: 0.875rem;
    color: var(--gray-400);
    font-weight: 400;
    margin-bottom: 2px;
}

.contact-text p {
    font-size: 1rem;
    color: var(--white);
    margin: 0;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--accent-light);
    transition: var(--transition-base);
}

.social-link:hover {
    color: var(--white);
}

.contact-qrcode {
    text-align: center;
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.qrcode-placeholder i {
    font-size: 2.5rem;
    color: #07c160;
}

.qrcode-placeholder span {
    font-size: 0.75rem;
    color: var(--gray-600);
}

.qrcode-image {
    width: 160px;
    height: auto;
    border-radius: var(--radius-md);
    background: var(--white);
    padding: 8px;
    margin-bottom: var(--spacing-md);
}

.contact-qrcode > p {
    font-size: 0.875rem;
    color: var(--gray-400);
}

.contact-form-wrapper {
    display: flex;
    align-items: flex-start;
}

.contact-form-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    width: 100%;
    box-shadow: var(--shadow-xl);
}

.contact-form-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
}

.form-group label i {
    margin-right: var(--spacing-xs);
    color: var(--accent);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.radio-group {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-sm) 0;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--gray-700);
    cursor: pointer;
}

.radio-group input[type="radio"] {
    width: auto;
    margin: 0;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--dark);
    position: relative;
    padding-top: 0;
}

.footer-wave {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-2xl);
}

.footer-wave svg {
    display: block;
    width: 100%;
    height: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-4xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-text {
    font-size: 1.25rem;
}

.footer-desc {
    color: var(--gray-500);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.125rem;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--accent);
    color: var(--white);
}

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

.footer-column h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    color: var(--gray-500);
    font-size: 0.9375rem;
}

.footer-column a:hover {
    color: var(--accent-light);
}

.footer-column .contact-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-500);
    font-size: 0.9375rem;
}

.footer-column .contact-list i {
    color: var(--accent-light);
    width: 16px;
}

.footer-bottom {
    padding: var(--spacing-lg) 0;
    display: flex;
    justify-content: space-between;
    color: var(--gray-600);
    font-size: 0.8125rem;
}

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--accent-dark);
    transform: translateY(-3px);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .flow-steps {
        flex-wrap: wrap;
    }
    
    .flow-step {
        flex: 1 1 45%;
    }
    
    .flow-arrow {
        display: none;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 80px var(--spacing-xl) var(--spacing-xl);
        transition: var(--transition-base);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }

    .nav-item-dropdown {
        width: 100%;
    }

    .navbar .nav-item-dropdown > .nav-dropdown {
        position: static;
        min-width: 0;
        width: 100%;
        margin-top: 8px;
        padding: 8px;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 12px;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: none;
        display: none;
    }

    .navbar .nav-item-dropdown > .nav-dropdown::before,
    .navbar .nav-item-dropdown > .nav-dropdown::after {
        display: none;
    }

    .navbar .nav-item-dropdown.open > .nav-dropdown {
        display: block;
    }

    .navbar .nav-item-dropdown > .nav-dropdown a {
        color: rgba(255, 255, 255, 0.92) !important;
        font-weight: 500;
    }

    .navbar .nav-item-dropdown > .nav-dropdown a::before {
        background: var(--gold-light);
        box-shadow: 0 0 0 3px rgba(224, 191, 76, 0.18);
    }

    .navbar .nav-item-dropdown > .nav-dropdown a:hover {
        background: rgba(255, 255, 255, 0.1);
        color: #ffffff !important;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-features {
        justify-content: flex-start;
    }
    
    .hero-buttons {
        justify-content: flex-start;
    }
    
    .about-wrapper,
    .founder-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .founder-image {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .founder-content {
        text-align: left;
    }
    
    .founder-core, .founder-views {
        text-align: left;
    }
    
    .founder-core li, .founder-views li {
        text-align: left;
    }
    
    .achievement-item {
        text-align: left;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .core-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .logo-image {
        height: 35px;
    }
    
    .logo-text {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        font-size: 0.875rem;
    }
    
    .advantages-grid,
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-dot {
        left: 20px;
    }
    
    .about-mission {
        grid-template-columns: 1fr;
    }
    
    .hero-features {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-badge {
        margin-left: 0;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .category-courses {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-2xl) 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .course-tabs,
    .case-filters,
    .news-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .course-tab,
    .filter-btn,
    .news-tab {
        text-align: center;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .flow-step {
        flex: 1 1 100%;
    }
}

/* ============================================
   人物专访视频卡片样式
   ============================================ */
.interview-section {
    margin-bottom: var(--spacing-md);
}

.interview-videos {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.interview-video-card {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    cursor: pointer;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.interview-video-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.interview-video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(16, 163, 127, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.play-button i {
    color: var(--white);
    font-size: 1.5rem;
    margin-left: 4px;
}

.interview-video-card:hover .play-button {
    background: var(--accent);
    transform: translate(-50%, -50%) scale(1.1);
}

.video-title {
    padding: var(--spacing-md);
    text-align: center;
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 500;
}

/* ============================================
   视频弹层样式
   ============================================ */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.video-modal.active {
    display: flex;
}

.video-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
}

.video-modal-content {
    position: relative;
    z-index: 1;
    width: 90%;
    max-width: 900px;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: visible;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.video-modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 44px;
    height: 44px;
    background: rgba(0, 0, 0, 0.7);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    z-index: 10;
}

.video-modal-close i {
    color: #fff;
    font-size: 1.5rem;
}

.video-modal-close:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: #fff;
    transform: rotate(90deg);
}

.video-modal-close:hover i {
    color: #333;
}

.video-modal-content video {
    width: 100%;
    display: block;
    border-radius: var(--radius-lg);
}

body.modal-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .interview-videos {
        flex-direction: column;
        align-items: center;
    }
    
    .interview-video-card {
        max-width: 100%;
        width: 100%;
    }
    
    .video-modal-content {
        width: 95%;
    }
    
    .video-modal-close {
        top: -40px;
        right: 5px;
    }
    
    .play-button {
        width: 50px;
        height: 50px;
    }
    
    .play-button i {
        font-size: 1.25rem;
    }
}

/* 图片懒加载 - 使用原生 loading="lazy"，无需 JS 控制透明度 */
img.lazy-img {
    transition: opacity 0.4s ease;
}