/* ============================================
   未名锡官网 - 极简品牌站样式表
   品牌色系：深海军蓝(#1A2B4A) + 米白(#F5F0EB) + 金色(#D4A843)
   ============================================ */

/* CSS变量 */
:root {
    --color-navy: #1A2B4A;
    --color-navy-light: #2a3f66;
    --color-navy-dark: #0f1a2e;
    --color-cream: #F5F0EB;
    --color-gold: #D4A843;
    --color-gold-light: #e6c77a;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-bg: #FAFAF8;
    
    --font-cn: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(26, 43, 74, 0.08);
    --shadow-md: 0 4px 16px rgba(26, 43, 74, 0.12);
    --shadow-lg: 0 8px 32px rgba(26, 43, 74, 0.16);
    
    --transition: all 0.3s ease;
}

/* 重置与基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-cn);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

ul {
    list-style: none;
}

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

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(26, 43, 74, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-cn {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.05em;
}

.logo-en {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-navy);
    padding: var(--spacing-md);
    z-index: 999;
}

.mobile-menu.active {
    display: block;
}

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

.mobile-menu a {
    color: var(--color-white);
    padding: var(--spacing-sm);
    display: block;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px var(--spacing-md) var(--spacing-xxl);
}

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

.hero-title {
    margin-bottom: var(--spacing-md);
}

.brand-highlight {
    display: block;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.brand-slogan {
    display: block;
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 400;
    color: var(--color-gold);
    letter-spacing: 0.3em;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 4vw, 2rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
    letter-spacing: 0.1em;
}

.hero-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xl);
}

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

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 1;
}

.hexagon {
    position: absolute;
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(212, 168, 67, 0.1) 0%, rgba(212, 168, 67, 0.02) 100%);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    animation: float 20s ease-in-out infinite;
}

.hexagon:nth-child(1) {
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.hexagon:nth-child(2) {
    top: 60%;
    right: -5%;
    animation-delay: -7s;
    width: 200px;
    height: 200px;
}

.hexagon:nth-child(3) {
    bottom: 10%;
    left: 30%;
    animation-delay: -14s;
    width: 150px;
    height: 150px;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-gold);
    color: var(--color-navy);
}

.btn-primary:hover {
    background: var(--color-gold-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    border-color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
}

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

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

.btn-gold {
    background: var(--color-gold);
    color: var(--color-navy);
}

.btn-gold:hover {
    background: var(--color-gold-light);
}

/* 通用区块标题 */
.section-title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-gold);
    margin: var(--spacing-sm) auto;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

/* 核心洞察 */
.core-insights {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.insight-card {
    background: var(--color-cream);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

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

.insight-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gold);
    opacity: 0.5;
    margin-bottom: var(--spacing-sm);
}

.insight-card h3 {
    font-size: 1.1rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.insight-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.insight-card strong {
    color: var(--color-navy);
}

/* 专家智库卡片样式 */
.insight-card .insight-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gold);
    opacity: 1;
    margin-bottom: var(--spacing-xs);
}

.insight-card .expert-role {
    color: var(--color-gold);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.insight-card .expert-desc {
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.insight-card .expert-bg {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* 治理决定论 */
.governance-impact {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
}

.governance-impact .section-title {
    color: var(--color-white);
}

.governance-impact .section-title::after {
    background: var(--color-gold);
}

.impact-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 700px;
    margin: var(--spacing-xl) auto 0;
}

.impact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-gold);
}

.impact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.impact-text h3 {
    font-size: 1.2rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.impact-text p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

/* 品牌主张 */
.brand-statement {
    padding: var(--spacing-xxl) 0;
    background: var(--color-cream);
}

.brand-statement blockquote {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.brand-statement blockquote p {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-navy);
    line-height: 1.8;
}

.brand-statement blockquote strong {
    color: var(--color-gold);
}

/* 产品预览 */
.product-preview {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.product-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.flow-item {
    background: var(--color-cream);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    min-width: 140px;
    transition: var(--transition);
}

.flow-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.flow-icon {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.flow-item h4 {
    font-size: 0.85rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.flow-item p {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.flow-arrow {
    color: var(--color-gold);
    font-size: 1.5rem;
    font-weight: bold;
}

.flow-note {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
}

.flow-note strong {
    color: var(--color-navy);
}

.cta-center {
    text-align: center;
}

/* 创始人预览 */
.founder-preview {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg);
}

.founder-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    align-items: center;
    box-shadow: var(--shadow-md);
}

.founder-label {
    display: inline-block;
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.founder-info h3 {
    font-size: 1.5rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.founder-title {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.founder-desc {
    color: var(--color-text);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.founder-credentials {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.founder-credentials li {
    font-size: 0.85rem;
    color: var(--color-text-light);
    padding-left: 1.25rem;
    position: relative;
}

.founder-credentials li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: bold;
}

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

/* 页脚 */
.footer {
    background: var(--color-navy);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-contact h4,
.footer-links h4 {
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

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

.footer-links a {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-gold);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
}

.footer-bottom a {
    color: var(--color-gold);
}

/* ============================================
   WGF五维治理页面
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    padding: 140px 0 var(--spacing-xxl);
    text-align: center;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
}

.wgf-section {
    padding: var(--spacing-xxl) 0;
}

.wgf-section:nth-child(even) {
    background: var(--color-white);
}

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

.wgf-card {
    background: var(--color-cream);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border-left: 5px solid var(--color-gold);
}

.wgf-card h3 {
    color: var(--color-navy);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.wgf-card h3 .wgf-level {
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.wgf-card .wgf-desc {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.wgf-card .wgf-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.wgf-card .wgf-items span {
    background: rgba(26, 43, 74, 0.08);
    color: var(--color-navy);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.wgf-card .wgf-weight {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(26, 43, 74, 0.1);
    color: var(--color-gold);
    font-size: 0.85rem;
    font-weight: 600;
    text-align: right;
}

/* 成熟度模型 */
.maturity-section {
    background: var(--color-navy);
    padding: var(--spacing-xxl) 0;
}

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

.maturity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.maturity-card {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.maturity-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-gold);
}

.maturity-level {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.maturity-name {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.maturity-desc {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   产品体系页面
   ============================================ */
.products-section {
    padding: var(--spacing-xxl) 0;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.product-item {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-lg);
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.product-icon {
    width: 60px;
    height: 60px;
    background: var(--color-cream);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.product-info h3 {
    color: var(--color-navy);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.product-info h3 .product-badge {
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-left: var(--spacing-xs);
    font-weight: 600;
}

.product-info p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.product-info .product-features {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.product-info .product-features span {
    font-size: 0.8rem;
    color: var(--color-text);
}

.product-price {
    text-align: right;
}

.product-price .price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-navy);
}

.product-price .price-unit {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.product-cta {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-cream);
}

/* ============================================
   白皮书页面
   ============================================ */
.whitepaper-section {
    padding: var(--spacing-xxl) 0;
}

.whitepaper-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

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

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

.whitepaper-cover {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    padding: var(--spacing-xl);
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.whitepaper-cover h3 {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.whitepaper-cover p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.whitepaper-badge {
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    align-self: center;
}

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

.whitepaper-content p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.whitepaper-download {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.download-btn {
    flex: 1;
    background: var(--color-navy);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--color-navy-light);
}

/* 联系表单 */
.contact-form-section {
    background: var(--color-cream);
    padding: var(--spacing-xxl) 0;
}

.form-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

.form-card h3 {
    text-align: center;
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* ============================================
   关于页面
   ============================================ */
.founder-detail {
    padding: var(--spacing-xxl) 0;
}

.founder-profile {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
    box-shadow: var(--shadow-md);
}

.founder-avatar {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    text-align: center;
}

.founder-avatar .avatar-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.founder-avatar h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.founder-avatar p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.founder-detail-info h2 {
    color: var(--color-navy);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.founder-detail-info .detail-subtitle {
    color: var(--color-gold);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.founder-bio {
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.credentials-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.credential-item {
    background: var(--color-cream);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.credential-item span:first-child {
    font-size: 1.25rem;
}

.credential-item span:last-child {
    font-size: 0.9rem;
    color: var(--color-text);
}

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

.project-tags span {
    background: var(--color-navy);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

.contact-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding-top: 100px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .founder-card {
        grid-template-columns: 1fr;
    }
    
    .founder-cta {
        flex-direction: row;
        justify-content: center;
    }
    
    .product-item {
        grid-template-columns: 1fr;
    }
    
    .product-price {
        text-align: left;
    }
    
    .founder-profile {
        grid-template-columns: 1fr;
    }
    
    .contact-buttons {
        flex-direction: column;
    }
    
    .product-flow {
        flex-direction: column;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
}

/* ===== 品牌故事 ===== */
.brand-story {
    padding: var(--spacing-xxl) 0;
    background: var(--color-cream);
}

.brand-story-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.story-block {
    background: var(--color-white);
    border-radius: 12px;
    padding: var(--spacing-xl);
    box-shadow: 0 2px 16px rgba(26,43,74,0.06);
    border-top: 3px solid var(--color-gold);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.story-block:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(26,43,74,0.1);
}

.story-block h3 {
    font-size: 1.8rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
    font-family: "Noto Serif SC", "STSong", serif;
    letter-spacing: 0.1em;
}

.story-block p {
    color: var(--color-text);
    line-height: 1.9;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .brand-story-content {
        grid-template-columns: 1fr;
    }
}

/* ===== 使命愿景价值观 ===== */
.mvv-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-navy);
}

.mvv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-xl);
}

.mvv-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: transform 0.3s ease;
}

.mvv-card:hover {
    transform: translateY(-4px);
}

.mvv-label {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
    border-radius: 20px;
    padding: 2px 14px;
    margin-bottom: var(--spacing-md);
}

.mvv-card h3 {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.mvv-card > p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.6;
}

.values-list {
    text-align: left;
    margin-top: var(--spacing-md);
}

.value-item {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.value-item:last-child {
    border-bottom: none;
}

.value-item strong {
    color: var(--color-gold);
    font-size: 0.9rem;
    white-space: nowrap;
}

.value-item span {
    color: rgba(255,255,255,0.65);
    font-size: 0.8rem;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .mvv-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 品牌定位增强 ===== */
.brand-slogan {
    text-align: center;
    font-size: 1.3rem;
    color: var(--color-gold);
    margin-top: var(--spacing-md);
    letter-spacing: 0.08em;
    font-family: "Noto Serif SC", "STSong", serif;
}

.brand-claim {
    text-align: center;
    font-size: 1.15rem;
    color: var(--color-navy);
    margin-top: var(--spacing-md);
    letter-spacing: 0.02em;
}

.brand-positioning {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* ============================================
   麦肯锡风格首页 — 大留白·一句话打穿
   ============================================ */

/* Hero — 一句话居中，极简 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 var(--spacing-md);
    position: relative;
}

.hero-content {
    max-width: 800px;
}

.hero-eyebrow {
    font-size: 0.95rem;
    color: var(--color-gold);
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-headline {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.05em;
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: rgba(255, 255, 255, 0.6);
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    letter-spacing: 0.05em;
}

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

/* 通用麦肯锡区块 */
.mck-section {
    padding: 100px 0;
}

.mck-section.mck-dark {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
}

.mck-section.mck-cream {
    background: var(--color-cream);
}

.mck-section-title {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 700;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.02em;
}

.mck-section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: var(--color-gold);
    margin: var(--spacing-sm) auto 0;
}

.mck-section-title.light {
    color: var(--color-white);
}

.mck-section-sub {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xxl);
    font-size: 1.05rem;
}

.mck-eyebrow {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.mck-body {
    text-align: center;
    max-width: 680px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

/* 三列卡片 */
.mck-cards {
    display: grid;
    gap: var(--spacing-lg);
}

.mck-cards.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.mck-cards.two-col {
    grid-template-columns: repeat(2, 1fr);
}

.mck-card {
    background: var(--color-cream);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mck-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.mck-card-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gold);
    opacity: 0.4;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.mck-card-icon {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.mck-card h3 {
    font-size: 1.2rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.mck-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* 品牌主张区 */
.brand-statement-section {
    background: var(--color-cream);
    padding: 80px 0;
}

.mck-quote {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    border: none;
    padding: 0;
}

.mck-quote p {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-navy);
    line-height: 1.9;
    letter-spacing: 0.03em;
}

.mck-quote strong {
    color: var(--color-gold);
}

/* 差异化卡片 */
.diff-card {
    text-align: center;
    border-top: 3px solid var(--color-gold);
}

.diff-icon {
    font-size: 2rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
}

.diff-card h3 {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-sm);
}

.diff-card p {
    font-size: 0.92rem;
}

/* 专家智库 */
.expert-featured {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    background: var(--color-white);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(26, 43, 74, 0.08);
    border-left: 4px solid var(--color-gold);
}

.expert-featured-inner {
    padding: var(--spacing-xl) var(--spacing-xxl);
}

.expert-featured h3 {
    font-size: 1.3rem;
    color: var(--color-navy);
    margin: 0 0 var(--spacing-xs);
}

.expert-featured-role {
    color: var(--color-gold);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.expert-featured-desc {
    color: var(--color-text);
    line-height: 1.8;
    margin: 0;
}

.expert-featured-tags {
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
}

.expert-role {
    color: var(--color-gold);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.expert-bg {
    color: var(--color-text-light);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

/* 深色区块按钮 */
.btn-outline-light {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    border: 2px solid rgba(255, 255, 255, 0.4);
    color: var(--color-white);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline-light:hover {
    border-color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
}

/* CTA居中行 */
.mck-cta-row {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* 创始人条 */
.founder-strip {
    background: var(--color-cream);
}

.founder-strip-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.founder-strip-left .founder-label {
    display: inline-block;
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.founder-strip-left h3 {
    font-size: 1.5rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.founder-one-liner {
    color: var(--color-text-light);
    font-size: 1.05rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .mck-cards.three-col,
    .mck-cards.two-col {
        grid-template-columns: 1fr;
    }

    .founder-strip-content {
        flex-direction: column;
        text-align: center;
    }

    .mck-section {
        padding: 60px 0;
    }

    .hero-headline {
        font-size: 2rem;
    }

    .expert-featured-inner {
        padding: var(--spacing-lg);
    }
}

/* WeimSea英文品牌名专用字体 */
.brand-name-en {
    font-family: "Cormorant Garamond", serif !important;
    letter-spacing: 0.15em;
    font-weight: 600;
}

/* ============================================
   麦肯锡风格 — 子页面统一补充
   ============================================ */

/* 页面标题装饰线 */
.page-header h1::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: var(--color-gold);
    margin: var(--spacing-sm) auto 0;
}

.page-header p {
    margin-top: var(--spacing-sm);
}

/* 米白区块内的卡片白底 */
.mck-cream .mck-card {
    background: var(--color-white);
}

/* 深色区块内的卡片 */
.mck-dark .mck-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.mck-dark .mck-card h3 {
    color: var(--color-white);
}

.mck-dark .mck-card p {
    color: rgba(255, 255, 255, 0.7);
}

.mck-dark .mck-card p strong {
    color: var(--color-gold);
}

.mck-dark .mck-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-gold);
}

.mck-dark .mck-card-num {
    opacity: 1;
}

/* 四列网格 */
.mck-cards.four-col {
    grid-template-columns: repeat(4, 1fr);
}

/* 高亮卡片（W4 AI治理） */
.mck-card-highlight {
    border-left: 4px solid var(--color-gold);
}

/* 白皮书徽章 */
.mck-badge {
    display: inline-block;
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.mck-badge.mck-badge-outline {
    background: transparent;
    color: var(--color-navy);
    border: 1px solid var(--color-navy);
}

.mck-card-meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.mck-card-audience {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* 引用署名 */
.mck-quote-footer {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-light);
    text-align: center;
}

/* 创始人详情卡片 */
.founder-detail-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl) var(--spacing-xl);
    box-shadow: var(--shadow-md);
    max-width: 800px;
    margin: 0 auto;
}

.founder-detail-card .founder-label {
    display: inline-block;
    background: var(--color-gold);
    color: var(--color-navy);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.founder-detail-card h2 {
    color: var(--color-navy);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.founder-detail-card .detail-subtitle {
    color: var(--color-gold);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
}

.founder-detail-card .founder-bio {
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: var(--spacing-lg);
}

.founder-detail-card .founder-bio strong {
    color: var(--color-navy);
}

/* 联系方式卡片 */
.contact-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    margin: 0 auto;
}

.contact-phone {
    font-size: 1.5rem;
    color: var(--color-navy);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.contact-note {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

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

/* 价值观列表（深色区块内） */
.mck-dark .values-list {
    text-align: left;
    margin-top: var(--spacing-md);
}

.mck-dark .value-item {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mck-dark .value-item:last-child {
    border-bottom: none;
}

.mck-dark .value-item strong {
    color: var(--color-gold);
    font-size: 0.9rem;
    white-space: nowrap;
}

.mck-dark .value-item span {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.8rem;
    line-height: 1.5;
}

/* 响应式补充 */
@media (max-width: 768px) {
    .mck-cards.four-col {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .mck-cards.four-col {
        grid-template-columns: 1fr;
    }
}